Loading...
1// SPDX-License-Identifier: GPL-2.0-only
2/******************************************************************************
3 *
4 * Copyright(c) 2003 - 2011 Intel Corporation. All rights reserved.
5 *
6 * Portions of this file are derived from the ipw3945 project, as well
7 * as portions of the ieee80211 subsystem header files.
8 *
9 * Contact Information:
10 * Intel Linux Wireless <ilw@linux.intel.com>
11 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
12 *
13 *****************************************************************************/
14
15#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
16
17#include <linux/kernel.h>
18#include <linux/module.h>
19#include <linux/init.h>
20#include <linux/pci.h>
21#include <linux/slab.h>
22#include <linux/dma-mapping.h>
23#include <linux/delay.h>
24#include <linux/sched.h>
25#include <linux/skbuff.h>
26#include <linux/netdevice.h>
27#include <linux/firmware.h>
28#include <linux/etherdevice.h>
29#include <linux/if_arp.h>
30#include <linux/units.h>
31
32#include <net/mac80211.h>
33
34#include <asm/div64.h>
35
36#define DRV_NAME "iwl4965"
37
38#include "common.h"
39#include "4965.h"
40
41/******************************************************************************
42 *
43 * module boiler plate
44 *
45 ******************************************************************************/
46
47/*
48 * module name, copyright, version, etc.
49 */
50#define DRV_DESCRIPTION "Intel(R) Wireless WiFi 4965 driver for Linux"
51
52#ifdef CONFIG_IWLEGACY_DEBUG
53#define VD "d"
54#else
55#define VD
56#endif
57
58#define DRV_VERSION IWLWIFI_VERSION VD
59
60MODULE_DESCRIPTION(DRV_DESCRIPTION);
61MODULE_VERSION(DRV_VERSION);
62MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
63MODULE_LICENSE("GPL");
64MODULE_ALIAS("iwl4965");
65
66void
67il4965_check_abort_status(struct il_priv *il, u8 frame_count, u32 status)
68{
69 if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) {
70 IL_ERR("Tx flush command to flush out all frames\n");
71 if (!test_bit(S_EXIT_PENDING, &il->status))
72 queue_work(il->workqueue, &il->tx_flush);
73 }
74}
75
76/*
77 * EEPROM
78 */
79struct il_mod_params il4965_mod_params = {
80 .restart_fw = 1,
81 /* the rest are 0 by default */
82};
83
84void
85il4965_rx_queue_reset(struct il_priv *il, struct il_rx_queue *rxq)
86{
87 unsigned long flags;
88 int i;
89 spin_lock_irqsave(&rxq->lock, flags);
90 INIT_LIST_HEAD(&rxq->rx_free);
91 INIT_LIST_HEAD(&rxq->rx_used);
92 /* Fill the rx_used queue with _all_ of the Rx buffers */
93 for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
94 /* In the reset function, these buffers may have been allocated
95 * to an SKB, so we need to unmap and free potential storage */
96 if (rxq->pool[i].page != NULL) {
97 dma_unmap_page(&il->pci_dev->dev,
98 rxq->pool[i].page_dma,
99 PAGE_SIZE << il->hw_params.rx_page_order,
100 DMA_FROM_DEVICE);
101 __il_free_pages(il, rxq->pool[i].page);
102 rxq->pool[i].page = NULL;
103 }
104 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
105 }
106
107 for (i = 0; i < RX_QUEUE_SIZE; i++)
108 rxq->queue[i] = NULL;
109
110 /* Set us so that we have processed and used all buffers, but have
111 * not restocked the Rx queue with fresh buffers */
112 rxq->read = rxq->write = 0;
113 rxq->write_actual = 0;
114 rxq->free_count = 0;
115 spin_unlock_irqrestore(&rxq->lock, flags);
116}
117
118int
119il4965_rx_init(struct il_priv *il, struct il_rx_queue *rxq)
120{
121 u32 rb_size;
122 const u32 rfdnlog = RX_QUEUE_SIZE_LOG; /* 256 RBDs */
123 u32 rb_timeout = 0;
124
125 if (il->cfg->mod_params->amsdu_size_8K)
126 rb_size = FH49_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_8K;
127 else
128 rb_size = FH49_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_4K;
129
130 /* Stop Rx DMA */
131 il_wr(il, FH49_MEM_RCSR_CHNL0_CONFIG_REG, 0);
132
133 /* Reset driver's Rx queue write idx */
134 il_wr(il, FH49_RSCSR_CHNL0_RBDCB_WPTR_REG, 0);
135
136 /* Tell device where to find RBD circular buffer in DRAM */
137 il_wr(il, FH49_RSCSR_CHNL0_RBDCB_BASE_REG, (u32) (rxq->bd_dma >> 8));
138
139 /* Tell device where in DRAM to update its Rx status */
140 il_wr(il, FH49_RSCSR_CHNL0_STTS_WPTR_REG, rxq->rb_stts_dma >> 4);
141
142 /* Enable Rx DMA
143 * Direct rx interrupts to hosts
144 * Rx buffer size 4 or 8k
145 * RB timeout 0x10
146 * 256 RBDs
147 */
148 il_wr(il, FH49_MEM_RCSR_CHNL0_CONFIG_REG,
149 FH49_RCSR_RX_CONFIG_CHNL_EN_ENABLE_VAL |
150 FH49_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_INT_HOST_VAL |
151 FH49_RCSR_CHNL0_RX_CONFIG_SINGLE_FRAME_MSK |
152 rb_size |
153 (rb_timeout << FH49_RCSR_RX_CONFIG_REG_IRQ_RBTH_POS) |
154 (rfdnlog << FH49_RCSR_RX_CONFIG_RBDCB_SIZE_POS));
155
156 /* Set interrupt coalescing timer to default (2048 usecs) */
157 il_write8(il, CSR_INT_COALESCING, IL_HOST_INT_TIMEOUT_DEF);
158
159 return 0;
160}
161
162static void
163il4965_set_pwr_vmain(struct il_priv *il)
164{
165/*
166 * (for documentation purposes)
167 * to set power to V_AUX, do:
168
169 if (pci_pme_capable(il->pci_dev, PCI_D3cold))
170 il_set_bits_mask_prph(il, APMG_PS_CTRL_REG,
171 APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
172 ~APMG_PS_CTRL_MSK_PWR_SRC);
173 */
174
175 il_set_bits_mask_prph(il, APMG_PS_CTRL_REG,
176 APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
177 ~APMG_PS_CTRL_MSK_PWR_SRC);
178}
179
180int
181il4965_hw_nic_init(struct il_priv *il)
182{
183 unsigned long flags;
184 struct il_rx_queue *rxq = &il->rxq;
185 int ret;
186
187 spin_lock_irqsave(&il->lock, flags);
188 il_apm_init(il);
189 /* Set interrupt coalescing calibration timer to default (512 usecs) */
190 il_write8(il, CSR_INT_COALESCING, IL_HOST_INT_CALIB_TIMEOUT_DEF);
191 spin_unlock_irqrestore(&il->lock, flags);
192
193 il4965_set_pwr_vmain(il);
194 il4965_nic_config(il);
195
196 /* Allocate the RX queue, or reset if it is already allocated */
197 if (!rxq->bd) {
198 ret = il_rx_queue_alloc(il);
199 if (ret) {
200 IL_ERR("Unable to initialize Rx queue\n");
201 return -ENOMEM;
202 }
203 } else
204 il4965_rx_queue_reset(il, rxq);
205
206 il4965_rx_replenish(il);
207
208 il4965_rx_init(il, rxq);
209
210 spin_lock_irqsave(&il->lock, flags);
211
212 rxq->need_update = 1;
213 il_rx_queue_update_write_ptr(il, rxq);
214
215 spin_unlock_irqrestore(&il->lock, flags);
216
217 /* Allocate or reset and init all Tx and Command queues */
218 if (!il->txq) {
219 ret = il4965_txq_ctx_alloc(il);
220 if (ret)
221 return ret;
222 } else
223 il4965_txq_ctx_reset(il);
224
225 set_bit(S_INIT, &il->status);
226
227 return 0;
228}
229
230/*
231 * il4965_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
232 */
233static inline __le32
234il4965_dma_addr2rbd_ptr(struct il_priv *il, dma_addr_t dma_addr)
235{
236 return cpu_to_le32((u32) (dma_addr >> 8));
237}
238
239/*
240 * il4965_rx_queue_restock - refill RX queue from pre-allocated pool
241 *
242 * If there are slots in the RX queue that need to be restocked,
243 * and we have free pre-allocated buffers, fill the ranks as much
244 * as we can, pulling from rx_free.
245 *
246 * This moves the 'write' idx forward to catch up with 'processed', and
247 * also updates the memory address in the firmware to reference the new
248 * target buffer.
249 */
250void
251il4965_rx_queue_restock(struct il_priv *il)
252{
253 struct il_rx_queue *rxq = &il->rxq;
254 struct list_head *element;
255 struct il_rx_buf *rxb;
256 unsigned long flags;
257
258 spin_lock_irqsave(&rxq->lock, flags);
259 while (il_rx_queue_space(rxq) > 0 && rxq->free_count) {
260 /* The overwritten rxb must be a used one */
261 rxb = rxq->queue[rxq->write];
262 BUG_ON(rxb && rxb->page);
263
264 /* Get next free Rx buffer, remove from free list */
265 element = rxq->rx_free.next;
266 rxb = list_entry(element, struct il_rx_buf, list);
267 list_del(element);
268
269 /* Point to Rx buffer via next RBD in circular buffer */
270 rxq->bd[rxq->write] =
271 il4965_dma_addr2rbd_ptr(il, rxb->page_dma);
272 rxq->queue[rxq->write] = rxb;
273 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
274 rxq->free_count--;
275 }
276 spin_unlock_irqrestore(&rxq->lock, flags);
277 /* If the pre-allocated buffer pool is dropping low, schedule to
278 * refill it */
279 if (rxq->free_count <= RX_LOW_WATERMARK)
280 queue_work(il->workqueue, &il->rx_replenish);
281
282 /* If we've added more space for the firmware to place data, tell it.
283 * Increment device's write pointer in multiples of 8. */
284 if (rxq->write_actual != (rxq->write & ~0x7)) {
285 spin_lock_irqsave(&rxq->lock, flags);
286 rxq->need_update = 1;
287 spin_unlock_irqrestore(&rxq->lock, flags);
288 il_rx_queue_update_write_ptr(il, rxq);
289 }
290}
291
292/*
293 * il4965_rx_replenish - Move all used packet from rx_used to rx_free
294 *
295 * When moving to rx_free an SKB is allocated for the slot.
296 *
297 * Also restock the Rx queue via il_rx_queue_restock.
298 * This is called as a scheduled work item (except for during initialization)
299 */
300static void
301il4965_rx_allocate(struct il_priv *il, gfp_t priority)
302{
303 struct il_rx_queue *rxq = &il->rxq;
304 struct list_head *element;
305 struct il_rx_buf *rxb;
306 struct page *page;
307 dma_addr_t page_dma;
308 unsigned long flags;
309 gfp_t gfp_mask = priority;
310
311 while (1) {
312 spin_lock_irqsave(&rxq->lock, flags);
313 if (list_empty(&rxq->rx_used)) {
314 spin_unlock_irqrestore(&rxq->lock, flags);
315 return;
316 }
317 spin_unlock_irqrestore(&rxq->lock, flags);
318
319 if (rxq->free_count > RX_LOW_WATERMARK)
320 gfp_mask |= __GFP_NOWARN;
321
322 if (il->hw_params.rx_page_order > 0)
323 gfp_mask |= __GFP_COMP;
324
325 /* Alloc a new receive buffer */
326 page = alloc_pages(gfp_mask, il->hw_params.rx_page_order);
327 if (!page) {
328 if (net_ratelimit())
329 D_INFO("alloc_pages failed, " "order: %d\n",
330 il->hw_params.rx_page_order);
331
332 if (rxq->free_count <= RX_LOW_WATERMARK &&
333 net_ratelimit())
334 IL_ERR("Failed to alloc_pages with %s. "
335 "Only %u free buffers remaining.\n",
336 priority ==
337 GFP_ATOMIC ? "GFP_ATOMIC" : "GFP_KERNEL",
338 rxq->free_count);
339 /* We don't reschedule replenish work here -- we will
340 * call the restock method and if it still needs
341 * more buffers it will schedule replenish */
342 return;
343 }
344
345 /* Get physical address of the RB */
346 page_dma = dma_map_page(&il->pci_dev->dev, page, 0,
347 PAGE_SIZE << il->hw_params.rx_page_order,
348 DMA_FROM_DEVICE);
349 if (unlikely(dma_mapping_error(&il->pci_dev->dev, page_dma))) {
350 __free_pages(page, il->hw_params.rx_page_order);
351 break;
352 }
353
354 spin_lock_irqsave(&rxq->lock, flags);
355
356 if (list_empty(&rxq->rx_used)) {
357 spin_unlock_irqrestore(&rxq->lock, flags);
358 dma_unmap_page(&il->pci_dev->dev, page_dma,
359 PAGE_SIZE << il->hw_params.rx_page_order,
360 DMA_FROM_DEVICE);
361 __free_pages(page, il->hw_params.rx_page_order);
362 return;
363 }
364
365 element = rxq->rx_used.next;
366 rxb = list_entry(element, struct il_rx_buf, list);
367 list_del(element);
368
369 BUG_ON(rxb->page);
370
371 rxb->page = page;
372 rxb->page_dma = page_dma;
373 list_add_tail(&rxb->list, &rxq->rx_free);
374 rxq->free_count++;
375 il->alloc_rxb_page++;
376
377 spin_unlock_irqrestore(&rxq->lock, flags);
378 }
379}
380
381void
382il4965_rx_replenish(struct il_priv *il)
383{
384 unsigned long flags;
385
386 il4965_rx_allocate(il, GFP_KERNEL);
387
388 spin_lock_irqsave(&il->lock, flags);
389 il4965_rx_queue_restock(il);
390 spin_unlock_irqrestore(&il->lock, flags);
391}
392
393void
394il4965_rx_replenish_now(struct il_priv *il)
395{
396 il4965_rx_allocate(il, GFP_ATOMIC);
397
398 il4965_rx_queue_restock(il);
399}
400
401/* Assumes that the skb field of the buffers in 'pool' is kept accurate.
402 * If an SKB has been detached, the POOL needs to have its SKB set to NULL
403 * This free routine walks the list of POOL entries and if SKB is set to
404 * non NULL it is unmapped and freed
405 */
406void
407il4965_rx_queue_free(struct il_priv *il, struct il_rx_queue *rxq)
408{
409 int i;
410 for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
411 if (rxq->pool[i].page != NULL) {
412 dma_unmap_page(&il->pci_dev->dev,
413 rxq->pool[i].page_dma,
414 PAGE_SIZE << il->hw_params.rx_page_order,
415 DMA_FROM_DEVICE);
416 __il_free_pages(il, rxq->pool[i].page);
417 rxq->pool[i].page = NULL;
418 }
419 }
420
421 dma_free_coherent(&il->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd,
422 rxq->bd_dma);
423 dma_free_coherent(&il->pci_dev->dev, sizeof(struct il_rb_status),
424 rxq->rb_stts, rxq->rb_stts_dma);
425 rxq->bd = NULL;
426 rxq->rb_stts = NULL;
427}
428
429int
430il4965_rxq_stop(struct il_priv *il)
431{
432 int ret;
433
434 _il_wr(il, FH49_MEM_RCSR_CHNL0_CONFIG_REG, 0);
435 ret = _il_poll_bit(il, FH49_MEM_RSSR_RX_STATUS_REG,
436 FH49_RSSR_CHNL0_RX_STATUS_CHNL_IDLE,
437 FH49_RSSR_CHNL0_RX_STATUS_CHNL_IDLE,
438 1000);
439 if (ret < 0)
440 IL_ERR("Can't stop Rx DMA.\n");
441
442 return 0;
443}
444
445int
446il4965_hwrate_to_mac80211_idx(u32 rate_n_flags, enum nl80211_band band)
447{
448 int idx = 0;
449 int band_offset = 0;
450
451 /* HT rate format: mac80211 wants an MCS number, which is just LSB */
452 if (rate_n_flags & RATE_MCS_HT_MSK) {
453 idx = (rate_n_flags & 0xff);
454 return idx;
455 /* Legacy rate format, search for match in table */
456 } else {
457 if (band == NL80211_BAND_5GHZ)
458 band_offset = IL_FIRST_OFDM_RATE;
459 for (idx = band_offset; idx < RATE_COUNT_LEGACY; idx++)
460 if (il_rates[idx].plcp == (rate_n_flags & 0xFF))
461 return idx - band_offset;
462 }
463
464 return -1;
465}
466
467static int
468il4965_calc_rssi(struct il_priv *il, struct il_rx_phy_res *rx_resp)
469{
470 /* data from PHY/DSP regarding signal strength, etc.,
471 * contents are always there, not configurable by host. */
472 struct il4965_rx_non_cfg_phy *ncphy =
473 (struct il4965_rx_non_cfg_phy *)rx_resp->non_cfg_phy_buf;
474 u32 agc =
475 (le16_to_cpu(ncphy->agc_info) & IL49_AGC_DB_MASK) >>
476 IL49_AGC_DB_POS;
477
478 u32 valid_antennae =
479 (le16_to_cpu(rx_resp->phy_flags) & IL49_RX_PHY_FLAGS_ANTENNAE_MASK)
480 >> IL49_RX_PHY_FLAGS_ANTENNAE_OFFSET;
481 u8 max_rssi = 0;
482 u32 i;
483
484 /* Find max rssi among 3 possible receivers.
485 * These values are measured by the digital signal processor (DSP).
486 * They should stay fairly constant even as the signal strength varies,
487 * if the radio's automatic gain control (AGC) is working right.
488 * AGC value (see below) will provide the "interesting" info. */
489 for (i = 0; i < 3; i++)
490 if (valid_antennae & (1 << i))
491 max_rssi = max(ncphy->rssi_info[i << 1], max_rssi);
492
493 D_STATS("Rssi In A %d B %d C %d Max %d AGC dB %d\n",
494 ncphy->rssi_info[0], ncphy->rssi_info[2], ncphy->rssi_info[4],
495 max_rssi, agc);
496
497 /* dBm = max_rssi dB - agc dB - constant.
498 * Higher AGC (higher radio gain) means lower signal. */
499 return max_rssi - agc - IL4965_RSSI_OFFSET;
500}
501
502static u32
503il4965_translate_rx_status(struct il_priv *il, u32 decrypt_in)
504{
505 u32 decrypt_out = 0;
506
507 if ((decrypt_in & RX_RES_STATUS_STATION_FOUND) ==
508 RX_RES_STATUS_STATION_FOUND)
509 decrypt_out |=
510 (RX_RES_STATUS_STATION_FOUND |
511 RX_RES_STATUS_NO_STATION_INFO_MISMATCH);
512
513 decrypt_out |= (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK);
514
515 /* packet was not encrypted */
516 if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
517 RX_RES_STATUS_SEC_TYPE_NONE)
518 return decrypt_out;
519
520 /* packet was encrypted with unknown alg */
521 if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
522 RX_RES_STATUS_SEC_TYPE_ERR)
523 return decrypt_out;
524
525 /* decryption was not done in HW */
526 if ((decrypt_in & RX_MPDU_RES_STATUS_DEC_DONE_MSK) !=
527 RX_MPDU_RES_STATUS_DEC_DONE_MSK)
528 return decrypt_out;
529
530 switch (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) {
531
532 case RX_RES_STATUS_SEC_TYPE_CCMP:
533 /* alg is CCM: check MIC only */
534 if (!(decrypt_in & RX_MPDU_RES_STATUS_MIC_OK))
535 /* Bad MIC */
536 decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
537 else
538 decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
539
540 break;
541
542 case RX_RES_STATUS_SEC_TYPE_TKIP:
543 if (!(decrypt_in & RX_MPDU_RES_STATUS_TTAK_OK)) {
544 /* Bad TTAK */
545 decrypt_out |= RX_RES_STATUS_BAD_KEY_TTAK;
546 break;
547 }
548 fallthrough; /* if TTAK OK */
549 default:
550 if (!(decrypt_in & RX_MPDU_RES_STATUS_ICV_OK))
551 decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
552 else
553 decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
554 break;
555 }
556
557 D_RX("decrypt_in:0x%x decrypt_out = 0x%x\n", decrypt_in, decrypt_out);
558
559 return decrypt_out;
560}
561
562#define SMALL_PACKET_SIZE 256
563
564static void
565il4965_pass_packet_to_mac80211(struct il_priv *il, struct ieee80211_hdr *hdr,
566 u32 len, u32 ampdu_status, struct il_rx_buf *rxb,
567 struct ieee80211_rx_status *stats)
568{
569 struct sk_buff *skb;
570 __le16 fc = hdr->frame_control;
571
572 /* We only process data packets if the interface is open */
573 if (unlikely(!il->is_open)) {
574 D_DROP("Dropping packet while interface is not open.\n");
575 return;
576 }
577
578 if (unlikely(test_bit(IL_STOP_REASON_PASSIVE, &il->stop_reason))) {
579 il_wake_queues_by_reason(il, IL_STOP_REASON_PASSIVE);
580 D_INFO("Woke queues - frame received on passive channel\n");
581 }
582
583 /* In case of HW accelerated crypto and bad decryption, drop */
584 if (!il->cfg->mod_params->sw_crypto &&
585 il_set_decrypted_flag(il, hdr, ampdu_status, stats))
586 return;
587
588 skb = dev_alloc_skb(SMALL_PACKET_SIZE);
589 if (!skb) {
590 IL_ERR("dev_alloc_skb failed\n");
591 return;
592 }
593
594 if (len <= SMALL_PACKET_SIZE) {
595 skb_put_data(skb, hdr, len);
596 } else {
597 skb_add_rx_frag(skb, 0, rxb->page, (void *)hdr - rxb_addr(rxb),
598 len, PAGE_SIZE << il->hw_params.rx_page_order);
599 il->alloc_rxb_page--;
600 rxb->page = NULL;
601 }
602
603 il_update_stats(il, false, fc, len);
604 memcpy(IEEE80211_SKB_RXCB(skb), stats, sizeof(*stats));
605
606 ieee80211_rx(il->hw, skb);
607}
608
609/* Called for N_RX (legacy ABG frames), or
610 * N_RX_MPDU (HT high-throughput N frames). */
611static void
612il4965_hdl_rx(struct il_priv *il, struct il_rx_buf *rxb)
613{
614 struct ieee80211_hdr *header;
615 struct ieee80211_rx_status rx_status = {};
616 struct il_rx_pkt *pkt = rxb_addr(rxb);
617 struct il_rx_phy_res *phy_res;
618 __le32 rx_pkt_status;
619 struct il_rx_mpdu_res_start *amsdu;
620 u32 len;
621 u32 ampdu_status;
622 u32 rate_n_flags;
623
624 /**
625 * N_RX and N_RX_MPDU are handled differently.
626 * N_RX: physical layer info is in this buffer
627 * N_RX_MPDU: physical layer info was sent in separate
628 * command and cached in il->last_phy_res
629 *
630 * Here we set up local variables depending on which command is
631 * received.
632 */
633 if (pkt->hdr.cmd == N_RX) {
634 phy_res = (struct il_rx_phy_res *)pkt->u.raw;
635 header =
636 (struct ieee80211_hdr *)(pkt->u.raw + sizeof(*phy_res) +
637 phy_res->cfg_phy_cnt);
638
639 len = le16_to_cpu(phy_res->byte_count);
640 rx_pkt_status =
641 *(__le32 *) (pkt->u.raw + sizeof(*phy_res) +
642 phy_res->cfg_phy_cnt + len);
643 ampdu_status = le32_to_cpu(rx_pkt_status);
644 } else {
645 if (!il->_4965.last_phy_res_valid) {
646 IL_ERR("MPDU frame without cached PHY data\n");
647 return;
648 }
649 phy_res = &il->_4965.last_phy_res;
650 amsdu = (struct il_rx_mpdu_res_start *)pkt->u.raw;
651 header = (struct ieee80211_hdr *)(pkt->u.raw + sizeof(*amsdu));
652 len = le16_to_cpu(amsdu->byte_count);
653 rx_pkt_status = *(__le32 *) (pkt->u.raw + sizeof(*amsdu) + len);
654 ampdu_status =
655 il4965_translate_rx_status(il, le32_to_cpu(rx_pkt_status));
656 }
657
658 if ((unlikely(phy_res->cfg_phy_cnt > 20))) {
659 D_DROP("dsp size out of range [0,20]: %d\n",
660 phy_res->cfg_phy_cnt);
661 return;
662 }
663
664 if (!(rx_pkt_status & RX_RES_STATUS_NO_CRC32_ERROR) ||
665 !(rx_pkt_status & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
666 D_RX("Bad CRC or FIFO: 0x%08X.\n", le32_to_cpu(rx_pkt_status));
667 return;
668 }
669
670 /* This will be used in several places later */
671 rate_n_flags = le32_to_cpu(phy_res->rate_n_flags);
672
673 /* rx_status carries information about the packet to mac80211 */
674 rx_status.mactime = le64_to_cpu(phy_res->timestamp);
675 rx_status.band =
676 (phy_res->
677 phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ? NL80211_BAND_2GHZ :
678 NL80211_BAND_5GHZ;
679 rx_status.freq =
680 ieee80211_channel_to_frequency(le16_to_cpu(phy_res->channel),
681 rx_status.band);
682 rx_status.rate_idx =
683 il4965_hwrate_to_mac80211_idx(rate_n_flags, rx_status.band);
684 rx_status.flag = 0;
685
686 /* TSF isn't reliable. In order to allow smooth user experience,
687 * this W/A doesn't propagate it to the mac80211 */
688 /*rx_status.flag |= RX_FLAG_MACTIME_START; */
689
690 il->ucode_beacon_time = le32_to_cpu(phy_res->beacon_time_stamp);
691
692 /* Find max signal strength (dBm) among 3 antenna/receiver chains */
693 rx_status.signal = il4965_calc_rssi(il, phy_res);
694
695 D_STATS("Rssi %d, TSF %llu\n", rx_status.signal,
696 (unsigned long long)rx_status.mactime);
697
698 /*
699 * "antenna number"
700 *
701 * It seems that the antenna field in the phy flags value
702 * is actually a bit field. This is undefined by radiotap,
703 * it wants an actual antenna number but I always get "7"
704 * for most legacy frames I receive indicating that the
705 * same frame was received on all three RX chains.
706 *
707 * I think this field should be removed in favor of a
708 * new 802.11n radiotap field "RX chains" that is defined
709 * as a bitmask.
710 */
711 rx_status.antenna =
712 (le16_to_cpu(phy_res->phy_flags) & RX_RES_PHY_FLAGS_ANTENNA_MSK) >>
713 RX_RES_PHY_FLAGS_ANTENNA_POS;
714
715 /* set the preamble flag if appropriate */
716 if (phy_res->phy_flags & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
717 rx_status.enc_flags |= RX_ENC_FLAG_SHORTPRE;
718
719 /* Set up the HT phy flags */
720 if (rate_n_flags & RATE_MCS_HT_MSK)
721 rx_status.encoding = RX_ENC_HT;
722 if (rate_n_flags & RATE_MCS_HT40_MSK)
723 rx_status.bw = RATE_INFO_BW_40;
724 else
725 rx_status.bw = RATE_INFO_BW_20;
726 if (rate_n_flags & RATE_MCS_SGI_MSK)
727 rx_status.enc_flags |= RX_ENC_FLAG_SHORT_GI;
728
729 if (phy_res->phy_flags & RX_RES_PHY_FLAGS_AGG_MSK) {
730 /* We know which subframes of an A-MPDU belong
731 * together since we get a single PHY response
732 * from the firmware for all of them.
733 */
734
735 rx_status.flag |= RX_FLAG_AMPDU_DETAILS;
736 rx_status.ampdu_reference = il->_4965.ampdu_ref;
737 }
738
739 il4965_pass_packet_to_mac80211(il, header, len, ampdu_status, rxb,
740 &rx_status);
741}
742
743/* Cache phy data (Rx signal strength, etc) for HT frame (N_RX_PHY).
744 * This will be used later in il_hdl_rx() for N_RX_MPDU. */
745static void
746il4965_hdl_rx_phy(struct il_priv *il, struct il_rx_buf *rxb)
747{
748 struct il_rx_pkt *pkt = rxb_addr(rxb);
749 il->_4965.last_phy_res_valid = true;
750 il->_4965.ampdu_ref++;
751 memcpy(&il->_4965.last_phy_res, pkt->u.raw,
752 sizeof(struct il_rx_phy_res));
753}
754
755static int
756il4965_get_channels_for_scan(struct il_priv *il, struct ieee80211_vif *vif,
757 enum nl80211_band band, u8 is_active,
758 u8 n_probes, struct il_scan_channel *scan_ch)
759{
760 struct ieee80211_channel *chan;
761 const struct ieee80211_supported_band *sband;
762 const struct il_channel_info *ch_info;
763 u16 passive_dwell = 0;
764 u16 active_dwell = 0;
765 int added, i;
766 u16 channel;
767
768 sband = il_get_hw_mode(il, band);
769 if (!sband)
770 return 0;
771
772 active_dwell = il_get_active_dwell_time(il, band, n_probes);
773 passive_dwell = il_get_passive_dwell_time(il, band, vif);
774
775 if (passive_dwell <= active_dwell)
776 passive_dwell = active_dwell + 1;
777
778 for (i = 0, added = 0; i < il->scan_request->n_channels; i++) {
779 chan = il->scan_request->channels[i];
780
781 if (chan->band != band)
782 continue;
783
784 channel = chan->hw_value;
785 scan_ch->channel = cpu_to_le16(channel);
786
787 ch_info = il_get_channel_info(il, band, channel);
788 if (!il_is_channel_valid(ch_info)) {
789 D_SCAN("Channel %d is INVALID for this band.\n",
790 channel);
791 continue;
792 }
793
794 if (!is_active || il_is_channel_passive(ch_info) ||
795 (chan->flags & IEEE80211_CHAN_NO_IR))
796 scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE;
797 else
798 scan_ch->type = SCAN_CHANNEL_TYPE_ACTIVE;
799
800 if (n_probes)
801 scan_ch->type |= IL_SCAN_PROBE_MASK(n_probes);
802
803 scan_ch->active_dwell = cpu_to_le16(active_dwell);
804 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
805
806 /* Set txpower levels to defaults */
807 scan_ch->dsp_atten = 110;
808
809 /* NOTE: if we were doing 6Mb OFDM for scans we'd use
810 * power level:
811 * scan_ch->tx_gain = ((1 << 5) | (2 << 3)) | 3;
812 */
813 if (band == NL80211_BAND_5GHZ)
814 scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3;
815 else
816 scan_ch->tx_gain = ((1 << 5) | (5 << 3));
817
818 D_SCAN("Scanning ch=%d prob=0x%X [%s %d]\n", channel,
819 le32_to_cpu(scan_ch->type),
820 (scan_ch->
821 type & SCAN_CHANNEL_TYPE_ACTIVE) ? "ACTIVE" : "PASSIVE",
822 (scan_ch->
823 type & SCAN_CHANNEL_TYPE_ACTIVE) ? active_dwell :
824 passive_dwell);
825
826 scan_ch++;
827 added++;
828 }
829
830 D_SCAN("total channels to scan %d\n", added);
831 return added;
832}
833
834static void
835il4965_toggle_tx_ant(struct il_priv *il, u8 *ant, u8 valid)
836{
837 int i;
838 u8 ind = *ant;
839
840 for (i = 0; i < RATE_ANT_NUM - 1; i++) {
841 ind = (ind + 1) < RATE_ANT_NUM ? ind + 1 : 0;
842 if (valid & BIT(ind)) {
843 *ant = ind;
844 return;
845 }
846 }
847}
848
849int
850il4965_request_scan(struct il_priv *il, struct ieee80211_vif *vif)
851{
852 struct il_host_cmd cmd = {
853 .id = C_SCAN,
854 .len = sizeof(struct il_scan_cmd),
855 .flags = CMD_SIZE_HUGE,
856 };
857 struct il_scan_cmd *scan;
858 u32 rate_flags = 0;
859 u16 cmd_len;
860 u16 rx_chain = 0;
861 enum nl80211_band band;
862 u8 n_probes = 0;
863 u8 rx_ant = il->hw_params.valid_rx_ant;
864 u8 rate;
865 bool is_active = false;
866 int chan_mod;
867 u8 active_chains;
868 u8 scan_tx_antennas = il->hw_params.valid_tx_ant;
869 int ret;
870
871 lockdep_assert_held(&il->mutex);
872
873 if (!il->scan_cmd) {
874 il->scan_cmd =
875 kmalloc(sizeof(struct il_scan_cmd) + IL_MAX_SCAN_SIZE,
876 GFP_KERNEL);
877 if (!il->scan_cmd) {
878 D_SCAN("fail to allocate memory for scan\n");
879 return -ENOMEM;
880 }
881 }
882 scan = il->scan_cmd;
883 memset(scan, 0, sizeof(struct il_scan_cmd) + IL_MAX_SCAN_SIZE);
884
885 scan->quiet_plcp_th = IL_PLCP_QUIET_THRESH;
886 scan->quiet_time = IL_ACTIVE_QUIET_TIME;
887
888 if (il_is_any_associated(il)) {
889 u16 interval;
890 u32 extra;
891 u32 suspend_time = 100;
892 u32 scan_suspend_time = 100;
893
894 D_INFO("Scanning while associated...\n");
895 interval = vif->bss_conf.beacon_int;
896
897 scan->suspend_time = 0;
898 scan->max_out_time = cpu_to_le32(200 * 1024);
899 if (!interval)
900 interval = suspend_time;
901
902 extra = (suspend_time / interval) << 22;
903 scan_suspend_time =
904 (extra | ((suspend_time % interval) * 1024));
905 scan->suspend_time = cpu_to_le32(scan_suspend_time);
906 D_SCAN("suspend_time 0x%X beacon interval %d\n",
907 scan_suspend_time, interval);
908 }
909
910 if (il->scan_request->n_ssids) {
911 int i, p = 0;
912 D_SCAN("Kicking off active scan\n");
913 for (i = 0; i < il->scan_request->n_ssids; i++) {
914 /* always does wildcard anyway */
915 if (!il->scan_request->ssids[i].ssid_len)
916 continue;
917 scan->direct_scan[p].id = WLAN_EID_SSID;
918 scan->direct_scan[p].len =
919 il->scan_request->ssids[i].ssid_len;
920 memcpy(scan->direct_scan[p].ssid,
921 il->scan_request->ssids[i].ssid,
922 il->scan_request->ssids[i].ssid_len);
923 n_probes++;
924 p++;
925 }
926 is_active = true;
927 } else
928 D_SCAN("Start passive scan.\n");
929
930 scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
931 scan->tx_cmd.sta_id = il->hw_params.bcast_id;
932 scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
933
934 switch (il->scan_band) {
935 case NL80211_BAND_2GHZ:
936 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
937 chan_mod =
938 le32_to_cpu(il->active.flags & RXON_FLG_CHANNEL_MODE_MSK) >>
939 RXON_FLG_CHANNEL_MODE_POS;
940 if (chan_mod == CHANNEL_MODE_PURE_40) {
941 rate = RATE_6M_PLCP;
942 } else {
943 rate = RATE_1M_PLCP;
944 rate_flags = RATE_MCS_CCK_MSK;
945 }
946 break;
947 case NL80211_BAND_5GHZ:
948 rate = RATE_6M_PLCP;
949 break;
950 default:
951 IL_WARN("Invalid scan band\n");
952 return -EIO;
953 }
954
955 /*
956 * If active scanning is requested but a certain channel is
957 * marked passive, we can do active scanning if we detect
958 * transmissions.
959 *
960 * There is an issue with some firmware versions that triggers
961 * a sysassert on a "good CRC threshold" of zero (== disabled),
962 * on a radar channel even though this means that we should NOT
963 * send probes.
964 *
965 * The "good CRC threshold" is the number of frames that we
966 * need to receive during our dwell time on a channel before
967 * sending out probes -- setting this to a huge value will
968 * mean we never reach it, but at the same time work around
969 * the aforementioned issue. Thus use IL_GOOD_CRC_TH_NEVER
970 * here instead of IL_GOOD_CRC_TH_DISABLED.
971 */
972 scan->good_CRC_th =
973 is_active ? IL_GOOD_CRC_TH_DEFAULT : IL_GOOD_CRC_TH_NEVER;
974
975 band = il->scan_band;
976
977 if (il->cfg->scan_rx_antennas[band])
978 rx_ant = il->cfg->scan_rx_antennas[band];
979
980 il4965_toggle_tx_ant(il, &il->scan_tx_ant[band], scan_tx_antennas);
981 rate_flags |= BIT(il->scan_tx_ant[band]) << RATE_MCS_ANT_POS;
982 scan->tx_cmd.rate_n_flags = cpu_to_le32(rate | rate_flags);
983
984 /* In power save mode use one chain, otherwise use all chains */
985 if (test_bit(S_POWER_PMI, &il->status)) {
986 /* rx_ant has been set to all valid chains previously */
987 active_chains =
988 rx_ant & ((u8) (il->chain_noise_data.active_chains));
989 if (!active_chains)
990 active_chains = rx_ant;
991
992 D_SCAN("chain_noise_data.active_chains: %u\n",
993 il->chain_noise_data.active_chains);
994
995 rx_ant = il4965_first_antenna(active_chains);
996 }
997
998 /* MIMO is not used here, but value is required */
999 rx_chain |= il->hw_params.valid_rx_ant << RXON_RX_CHAIN_VALID_POS;
1000 rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS;
1001 rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_SEL_POS;
1002 rx_chain |= 0x1 << RXON_RX_CHAIN_DRIVER_FORCE_POS;
1003 scan->rx_chain = cpu_to_le16(rx_chain);
1004
1005 cmd_len =
1006 il_fill_probe_req(il, (struct ieee80211_mgmt *)scan->data,
1007 vif->addr, il->scan_request->ie,
1008 il->scan_request->ie_len,
1009 IL_MAX_SCAN_SIZE - sizeof(*scan));
1010 scan->tx_cmd.len = cpu_to_le16(cmd_len);
1011
1012 scan->filter_flags |=
1013 (RXON_FILTER_ACCEPT_GRP_MSK | RXON_FILTER_BCON_AWARE_MSK);
1014
1015 scan->channel_count =
1016 il4965_get_channels_for_scan(il, vif, band, is_active, n_probes,
1017 (void *)&scan->data[cmd_len]);
1018 if (scan->channel_count == 0) {
1019 D_SCAN("channel count %d\n", scan->channel_count);
1020 return -EIO;
1021 }
1022
1023 cmd.len +=
1024 le16_to_cpu(scan->tx_cmd.len) +
1025 scan->channel_count * sizeof(struct il_scan_channel);
1026 cmd.data = scan;
1027 scan->len = cpu_to_le16(cmd.len);
1028
1029 set_bit(S_SCAN_HW, &il->status);
1030
1031 ret = il_send_cmd_sync(il, &cmd);
1032 if (ret)
1033 clear_bit(S_SCAN_HW, &il->status);
1034
1035 return ret;
1036}
1037
1038int
1039il4965_manage_ibss_station(struct il_priv *il, struct ieee80211_vif *vif,
1040 bool add)
1041{
1042 struct il_vif_priv *vif_priv = (void *)vif->drv_priv;
1043
1044 if (add)
1045 return il4965_add_bssid_station(il, vif->bss_conf.bssid,
1046 &vif_priv->ibss_bssid_sta_id);
1047 return il_remove_station(il, vif_priv->ibss_bssid_sta_id,
1048 vif->bss_conf.bssid);
1049}
1050
1051void
1052il4965_free_tfds_in_queue(struct il_priv *il, int sta_id, int tid, int freed)
1053{
1054 lockdep_assert_held(&il->sta_lock);
1055
1056 if (il->stations[sta_id].tid[tid].tfds_in_queue >= freed)
1057 il->stations[sta_id].tid[tid].tfds_in_queue -= freed;
1058 else {
1059 D_TX("free more than tfds_in_queue (%u:%d)\n",
1060 il->stations[sta_id].tid[tid].tfds_in_queue, freed);
1061 il->stations[sta_id].tid[tid].tfds_in_queue = 0;
1062 }
1063}
1064
1065#define IL_TX_QUEUE_MSK 0xfffff
1066
1067static bool
1068il4965_is_single_rx_stream(struct il_priv *il)
1069{
1070 return il->current_ht_config.smps == IEEE80211_SMPS_STATIC ||
1071 il->current_ht_config.single_chain_sufficient;
1072}
1073
1074#define IL_NUM_RX_CHAINS_MULTIPLE 3
1075#define IL_NUM_RX_CHAINS_SINGLE 2
1076#define IL_NUM_IDLE_CHAINS_DUAL 2
1077#define IL_NUM_IDLE_CHAINS_SINGLE 1
1078
1079/*
1080 * Determine how many receiver/antenna chains to use.
1081 *
1082 * More provides better reception via diversity. Fewer saves power
1083 * at the expense of throughput, but only when not in powersave to
1084 * start with.
1085 *
1086 * MIMO (dual stream) requires at least 2, but works better with 3.
1087 * This does not determine *which* chains to use, just how many.
1088 */
1089static int
1090il4965_get_active_rx_chain_count(struct il_priv *il)
1091{
1092 /* # of Rx chains to use when expecting MIMO. */
1093 if (il4965_is_single_rx_stream(il))
1094 return IL_NUM_RX_CHAINS_SINGLE;
1095 else
1096 return IL_NUM_RX_CHAINS_MULTIPLE;
1097}
1098
1099/*
1100 * When we are in power saving mode, unless device support spatial
1101 * multiplexing power save, use the active count for rx chain count.
1102 */
1103static int
1104il4965_get_idle_rx_chain_count(struct il_priv *il, int active_cnt)
1105{
1106 /* # Rx chains when idling, depending on SMPS mode */
1107 switch (il->current_ht_config.smps) {
1108 case IEEE80211_SMPS_STATIC:
1109 case IEEE80211_SMPS_DYNAMIC:
1110 return IL_NUM_IDLE_CHAINS_SINGLE;
1111 case IEEE80211_SMPS_OFF:
1112 return active_cnt;
1113 default:
1114 WARN(1, "invalid SMPS mode %d", il->current_ht_config.smps);
1115 return active_cnt;
1116 }
1117}
1118
1119/* up to 4 chains */
1120static u8
1121il4965_count_chain_bitmap(u32 chain_bitmap)
1122{
1123 u8 res;
1124 res = (chain_bitmap & BIT(0)) >> 0;
1125 res += (chain_bitmap & BIT(1)) >> 1;
1126 res += (chain_bitmap & BIT(2)) >> 2;
1127 res += (chain_bitmap & BIT(3)) >> 3;
1128 return res;
1129}
1130
1131/*
1132 * il4965_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
1133 *
1134 * Selects how many and which Rx receivers/antennas/chains to use.
1135 * This should not be used for scan command ... it puts data in wrong place.
1136 */
1137void
1138il4965_set_rxon_chain(struct il_priv *il)
1139{
1140 bool is_single = il4965_is_single_rx_stream(il);
1141 bool is_cam = !test_bit(S_POWER_PMI, &il->status);
1142 u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt;
1143 u32 active_chains;
1144 u16 rx_chain;
1145
1146 /* Tell uCode which antennas are actually connected.
1147 * Before first association, we assume all antennas are connected.
1148 * Just after first association, il4965_chain_noise_calibration()
1149 * checks which antennas actually *are* connected. */
1150 if (il->chain_noise_data.active_chains)
1151 active_chains = il->chain_noise_data.active_chains;
1152 else
1153 active_chains = il->hw_params.valid_rx_ant;
1154
1155 rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS;
1156
1157 /* How many receivers should we use? */
1158 active_rx_cnt = il4965_get_active_rx_chain_count(il);
1159 idle_rx_cnt = il4965_get_idle_rx_chain_count(il, active_rx_cnt);
1160
1161 /* correct rx chain count according hw settings
1162 * and chain noise calibration
1163 */
1164 valid_rx_cnt = il4965_count_chain_bitmap(active_chains);
1165 if (valid_rx_cnt < active_rx_cnt)
1166 active_rx_cnt = valid_rx_cnt;
1167
1168 if (valid_rx_cnt < idle_rx_cnt)
1169 idle_rx_cnt = valid_rx_cnt;
1170
1171 rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS;
1172 rx_chain |= idle_rx_cnt << RXON_RX_CHAIN_CNT_POS;
1173
1174 il->staging.rx_chain = cpu_to_le16(rx_chain);
1175
1176 if (!is_single && active_rx_cnt >= IL_NUM_RX_CHAINS_SINGLE && is_cam)
1177 il->staging.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
1178 else
1179 il->staging.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
1180
1181 D_ASSOC("rx_chain=0x%X active=%d idle=%d\n", il->staging.rx_chain,
1182 active_rx_cnt, idle_rx_cnt);
1183
1184 WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 ||
1185 active_rx_cnt < idle_rx_cnt);
1186}
1187
1188static const char *
1189il4965_get_fh_string(int cmd)
1190{
1191 switch (cmd) {
1192 IL_CMD(FH49_RSCSR_CHNL0_STTS_WPTR_REG);
1193 IL_CMD(FH49_RSCSR_CHNL0_RBDCB_BASE_REG);
1194 IL_CMD(FH49_RSCSR_CHNL0_WPTR);
1195 IL_CMD(FH49_MEM_RCSR_CHNL0_CONFIG_REG);
1196 IL_CMD(FH49_MEM_RSSR_SHARED_CTRL_REG);
1197 IL_CMD(FH49_MEM_RSSR_RX_STATUS_REG);
1198 IL_CMD(FH49_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV);
1199 IL_CMD(FH49_TSSR_TX_STATUS_REG);
1200 IL_CMD(FH49_TSSR_TX_ERROR_REG);
1201 default:
1202 return "UNKNOWN";
1203 }
1204}
1205
1206int
1207il4965_dump_fh(struct il_priv *il, char **buf, bool display)
1208{
1209 int i;
1210#ifdef CONFIG_IWLEGACY_DEBUG
1211 int pos = 0;
1212 size_t bufsz = 0;
1213#endif
1214 static const u32 fh_tbl[] = {
1215 FH49_RSCSR_CHNL0_STTS_WPTR_REG,
1216 FH49_RSCSR_CHNL0_RBDCB_BASE_REG,
1217 FH49_RSCSR_CHNL0_WPTR,
1218 FH49_MEM_RCSR_CHNL0_CONFIG_REG,
1219 FH49_MEM_RSSR_SHARED_CTRL_REG,
1220 FH49_MEM_RSSR_RX_STATUS_REG,
1221 FH49_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV,
1222 FH49_TSSR_TX_STATUS_REG,
1223 FH49_TSSR_TX_ERROR_REG
1224 };
1225#ifdef CONFIG_IWLEGACY_DEBUG
1226 if (display) {
1227 bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40;
1228 *buf = kmalloc(bufsz, GFP_KERNEL);
1229 if (!*buf)
1230 return -ENOMEM;
1231 pos +=
1232 scnprintf(*buf + pos, bufsz - pos, "FH register values:\n");
1233 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) {
1234 pos +=
1235 scnprintf(*buf + pos, bufsz - pos,
1236 " %34s: 0X%08x\n",
1237 il4965_get_fh_string(fh_tbl[i]),
1238 il_rd(il, fh_tbl[i]));
1239 }
1240 return pos;
1241 }
1242#endif
1243 IL_ERR("FH register values:\n");
1244 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) {
1245 IL_ERR(" %34s: 0X%08x\n", il4965_get_fh_string(fh_tbl[i]),
1246 il_rd(il, fh_tbl[i]));
1247 }
1248 return 0;
1249}
1250
1251static void
1252il4965_hdl_missed_beacon(struct il_priv *il, struct il_rx_buf *rxb)
1253{
1254 struct il_rx_pkt *pkt = rxb_addr(rxb);
1255 struct il_missed_beacon_notif *missed_beacon;
1256
1257 missed_beacon = &pkt->u.missed_beacon;
1258 if (le32_to_cpu(missed_beacon->consecutive_missed_beacons) >
1259 il->missed_beacon_threshold) {
1260 D_CALIB("missed bcn cnsq %d totl %d rcd %d expctd %d\n",
1261 le32_to_cpu(missed_beacon->consecutive_missed_beacons),
1262 le32_to_cpu(missed_beacon->total_missed_becons),
1263 le32_to_cpu(missed_beacon->num_recvd_beacons),
1264 le32_to_cpu(missed_beacon->num_expected_beacons));
1265 if (!test_bit(S_SCANNING, &il->status))
1266 il4965_init_sensitivity(il);
1267 }
1268}
1269
1270/* Calculate noise level, based on measurements during network silence just
1271 * before arriving beacon. This measurement can be done only if we know
1272 * exactly when to expect beacons, therefore only when we're associated. */
1273static void
1274il4965_rx_calc_noise(struct il_priv *il)
1275{
1276 struct stats_rx_non_phy *rx_info;
1277 int num_active_rx = 0;
1278 int total_silence = 0;
1279 int bcn_silence_a, bcn_silence_b, bcn_silence_c;
1280 int last_rx_noise;
1281
1282 rx_info = &(il->_4965.stats.rx.general);
1283 bcn_silence_a =
1284 le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER;
1285 bcn_silence_b =
1286 le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER;
1287 bcn_silence_c =
1288 le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER;
1289
1290 if (bcn_silence_a) {
1291 total_silence += bcn_silence_a;
1292 num_active_rx++;
1293 }
1294 if (bcn_silence_b) {
1295 total_silence += bcn_silence_b;
1296 num_active_rx++;
1297 }
1298 if (bcn_silence_c) {
1299 total_silence += bcn_silence_c;
1300 num_active_rx++;
1301 }
1302
1303 /* Average among active antennas */
1304 if (num_active_rx)
1305 last_rx_noise = (total_silence / num_active_rx) - 107;
1306 else
1307 last_rx_noise = IL_NOISE_MEAS_NOT_AVAILABLE;
1308
1309 D_CALIB("inband silence a %u, b %u, c %u, dBm %d\n", bcn_silence_a,
1310 bcn_silence_b, bcn_silence_c, last_rx_noise);
1311}
1312
1313#ifdef CONFIG_IWLEGACY_DEBUGFS
1314/*
1315 * based on the assumption of all stats counter are in DWORD
1316 * FIXME: This function is for debugging, do not deal with
1317 * the case of counters roll-over.
1318 */
1319static void
1320il4965_accumulative_stats(struct il_priv *il, __le32 * stats)
1321{
1322 int i, size;
1323 __le32 *prev_stats;
1324 u32 *accum_stats;
1325 u32 *delta, *max_delta;
1326 struct stats_general_common *general, *accum_general;
1327
1328 prev_stats = (__le32 *) &il->_4965.stats;
1329 accum_stats = (u32 *) &il->_4965.accum_stats;
1330 size = sizeof(struct il_notif_stats);
1331 general = &il->_4965.stats.general.common;
1332 accum_general = &il->_4965.accum_stats.general.common;
1333 delta = (u32 *) &il->_4965.delta_stats;
1334 max_delta = (u32 *) &il->_4965.max_delta;
1335
1336 for (i = sizeof(__le32); i < size;
1337 i +=
1338 sizeof(__le32), stats++, prev_stats++, delta++, max_delta++,
1339 accum_stats++) {
1340 if (le32_to_cpu(*stats) > le32_to_cpu(*prev_stats)) {
1341 *delta =
1342 (le32_to_cpu(*stats) - le32_to_cpu(*prev_stats));
1343 *accum_stats += *delta;
1344 if (*delta > *max_delta)
1345 *max_delta = *delta;
1346 }
1347 }
1348
1349 /* reset accumulative stats for "no-counter" type stats */
1350 accum_general->temperature = general->temperature;
1351 accum_general->ttl_timestamp = general->ttl_timestamp;
1352}
1353#endif
1354
1355static void
1356il4965_hdl_stats(struct il_priv *il, struct il_rx_buf *rxb)
1357{
1358 const int recalib_seconds = 60;
1359 bool change;
1360 struct il_rx_pkt *pkt = rxb_addr(rxb);
1361
1362 D_RX("Statistics notification received (%d vs %d).\n",
1363 (int)sizeof(struct il_notif_stats),
1364 le32_to_cpu(pkt->len_n_flags) & IL_RX_FRAME_SIZE_MSK);
1365
1366 change =
1367 ((il->_4965.stats.general.common.temperature !=
1368 pkt->u.stats.general.common.temperature) ||
1369 ((il->_4965.stats.flag & STATS_REPLY_FLG_HT40_MODE_MSK) !=
1370 (pkt->u.stats.flag & STATS_REPLY_FLG_HT40_MODE_MSK)));
1371#ifdef CONFIG_IWLEGACY_DEBUGFS
1372 il4965_accumulative_stats(il, (__le32 *) &pkt->u.stats);
1373#endif
1374
1375 /* TODO: reading some of stats is unneeded */
1376 memcpy(&il->_4965.stats, &pkt->u.stats, sizeof(il->_4965.stats));
1377
1378 set_bit(S_STATS, &il->status);
1379
1380 /*
1381 * Reschedule the stats timer to occur in recalib_seconds to ensure
1382 * we get a thermal update even if the uCode doesn't give us one
1383 */
1384 mod_timer(&il->stats_periodic,
1385 jiffies + msecs_to_jiffies(recalib_seconds * 1000));
1386
1387 if (unlikely(!test_bit(S_SCANNING, &il->status)) &&
1388 (pkt->hdr.cmd == N_STATS)) {
1389 il4965_rx_calc_noise(il);
1390 queue_work(il->workqueue, &il->run_time_calib_work);
1391 }
1392
1393 if (change)
1394 il4965_temperature_calib(il);
1395}
1396
1397static void
1398il4965_hdl_c_stats(struct il_priv *il, struct il_rx_buf *rxb)
1399{
1400 struct il_rx_pkt *pkt = rxb_addr(rxb);
1401
1402 if (le32_to_cpu(pkt->u.stats.flag) & UCODE_STATS_CLEAR_MSK) {
1403#ifdef CONFIG_IWLEGACY_DEBUGFS
1404 memset(&il->_4965.accum_stats, 0,
1405 sizeof(struct il_notif_stats));
1406 memset(&il->_4965.delta_stats, 0,
1407 sizeof(struct il_notif_stats));
1408 memset(&il->_4965.max_delta, 0, sizeof(struct il_notif_stats));
1409#endif
1410 D_RX("Statistics have been cleared\n");
1411 }
1412 il4965_hdl_stats(il, rxb);
1413}
1414
1415
1416/*
1417 * mac80211 queues, ACs, hardware queues, FIFOs.
1418 *
1419 * Cf. https://wireless.wiki.kernel.org/en/developers/Documentation/mac80211/queues
1420 *
1421 * Mac80211 uses the following numbers, which we get as from it
1422 * by way of skb_get_queue_mapping(skb):
1423 *
1424 * VO 0
1425 * VI 1
1426 * BE 2
1427 * BK 3
1428 *
1429 *
1430 * Regular (not A-MPDU) frames are put into hardware queues corresponding
1431 * to the FIFOs, see comments in iwl-prph.h. Aggregated frames get their
1432 * own queue per aggregation session (RA/TID combination), such queues are
1433 * set up to map into FIFOs too, for which we need an AC->FIFO mapping. In
1434 * order to map frames to the right queue, we also need an AC->hw queue
1435 * mapping. This is implemented here.
1436 *
1437 * Due to the way hw queues are set up (by the hw specific modules like
1438 * 4965.c), the AC->hw queue mapping is the identity
1439 * mapping.
1440 */
1441
1442static const u8 tid_to_ac[] = {
1443 IEEE80211_AC_BE,
1444 IEEE80211_AC_BK,
1445 IEEE80211_AC_BK,
1446 IEEE80211_AC_BE,
1447 IEEE80211_AC_VI,
1448 IEEE80211_AC_VI,
1449 IEEE80211_AC_VO,
1450 IEEE80211_AC_VO
1451};
1452
1453static inline int
1454il4965_get_ac_from_tid(u16 tid)
1455{
1456 if (likely(tid < ARRAY_SIZE(tid_to_ac)))
1457 return tid_to_ac[tid];
1458
1459 /* no support for TIDs 8-15 yet */
1460 return -EINVAL;
1461}
1462
1463static inline int
1464il4965_get_fifo_from_tid(u16 tid)
1465{
1466 static const u8 ac_to_fifo[] = {
1467 IL_TX_FIFO_VO,
1468 IL_TX_FIFO_VI,
1469 IL_TX_FIFO_BE,
1470 IL_TX_FIFO_BK,
1471 };
1472
1473 if (likely(tid < ARRAY_SIZE(tid_to_ac)))
1474 return ac_to_fifo[tid_to_ac[tid]];
1475
1476 /* no support for TIDs 8-15 yet */
1477 return -EINVAL;
1478}
1479
1480/*
1481 * handle build C_TX command notification.
1482 */
1483static void
1484il4965_tx_cmd_build_basic(struct il_priv *il, struct sk_buff *skb,
1485 struct il_tx_cmd *tx_cmd,
1486 struct ieee80211_tx_info *info,
1487 struct ieee80211_hdr *hdr, u8 std_id)
1488{
1489 __le16 fc = hdr->frame_control;
1490 __le32 tx_flags = tx_cmd->tx_flags;
1491
1492 tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
1493 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
1494 tx_flags |= TX_CMD_FLG_ACK_MSK;
1495 if (ieee80211_is_mgmt(fc))
1496 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
1497 if (ieee80211_is_probe_resp(fc) &&
1498 !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
1499 tx_flags |= TX_CMD_FLG_TSF_MSK;
1500 } else {
1501 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
1502 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
1503 }
1504
1505 if (ieee80211_is_back_req(fc))
1506 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK;
1507
1508 tx_cmd->sta_id = std_id;
1509 if (ieee80211_has_morefrags(fc))
1510 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
1511
1512 if (ieee80211_is_data_qos(fc)) {
1513 u8 *qc = ieee80211_get_qos_ctl(hdr);
1514 tx_cmd->tid_tspec = qc[0] & 0xf;
1515 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
1516 } else {
1517 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
1518 }
1519
1520 il_tx_cmd_protection(il, info, fc, &tx_flags);
1521
1522 tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
1523 if (ieee80211_is_mgmt(fc)) {
1524 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
1525 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
1526 else
1527 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
1528 } else {
1529 tx_cmd->timeout.pm_frame_timeout = 0;
1530 }
1531
1532 tx_cmd->driver_txop = 0;
1533 tx_cmd->tx_flags = tx_flags;
1534 tx_cmd->next_frame_len = 0;
1535}
1536
1537static void
1538il4965_tx_cmd_build_rate(struct il_priv *il,
1539 struct il_tx_cmd *tx_cmd,
1540 struct ieee80211_tx_info *info,
1541 struct ieee80211_sta *sta,
1542 __le16 fc)
1543{
1544 const u8 rts_retry_limit = 60;
1545 u32 rate_flags;
1546 int rate_idx;
1547 u8 data_retry_limit;
1548 u8 rate_plcp;
1549
1550 /* Set retry limit on DATA packets and Probe Responses */
1551 if (ieee80211_is_probe_resp(fc))
1552 data_retry_limit = 3;
1553 else
1554 data_retry_limit = IL4965_DEFAULT_TX_RETRY;
1555 tx_cmd->data_retry_limit = data_retry_limit;
1556 /* Set retry limit on RTS packets */
1557 tx_cmd->rts_retry_limit = min(data_retry_limit, rts_retry_limit);
1558
1559 /* DATA packets will use the uCode station table for rate/antenna
1560 * selection */
1561 if (ieee80211_is_data(fc)) {
1562 tx_cmd->initial_rate_idx = 0;
1563 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
1564 return;
1565 }
1566
1567 /**
1568 * If the current TX rate stored in mac80211 has the MCS bit set, it's
1569 * not really a TX rate. Thus, we use the lowest supported rate for
1570 * this band. Also use the lowest supported rate if the stored rate
1571 * idx is invalid.
1572 */
1573 rate_idx = info->control.rates[0].idx;
1574 if ((info->control.rates[0].flags & IEEE80211_TX_RC_MCS) || rate_idx < 0
1575 || rate_idx > RATE_COUNT_LEGACY)
1576 rate_idx = rate_lowest_index(&il->bands[info->band], sta);
1577 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
1578 if (info->band == NL80211_BAND_5GHZ)
1579 rate_idx += IL_FIRST_OFDM_RATE;
1580 /* Get PLCP rate for tx_cmd->rate_n_flags */
1581 rate_plcp = il_rates[rate_idx].plcp;
1582 /* Zero out flags for this packet */
1583 rate_flags = 0;
1584
1585 /* Set CCK flag as needed */
1586 if (rate_idx >= IL_FIRST_CCK_RATE && rate_idx <= IL_LAST_CCK_RATE)
1587 rate_flags |= RATE_MCS_CCK_MSK;
1588
1589 /* Set up antennas */
1590 il4965_toggle_tx_ant(il, &il->mgmt_tx_ant, il->hw_params.valid_tx_ant);
1591 rate_flags |= BIT(il->mgmt_tx_ant) << RATE_MCS_ANT_POS;
1592
1593 /* Set the rate in the TX cmd */
1594 tx_cmd->rate_n_flags = cpu_to_le32(rate_plcp | rate_flags);
1595}
1596
1597static void
1598il4965_tx_cmd_build_hwcrypto(struct il_priv *il, struct ieee80211_tx_info *info,
1599 struct il_tx_cmd *tx_cmd, struct sk_buff *skb_frag,
1600 int sta_id)
1601{
1602 struct ieee80211_key_conf *keyconf = info->control.hw_key;
1603
1604 switch (keyconf->cipher) {
1605 case WLAN_CIPHER_SUITE_CCMP:
1606 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
1607 memcpy(tx_cmd->key, keyconf->key, keyconf->keylen);
1608 if (info->flags & IEEE80211_TX_CTL_AMPDU)
1609 tx_cmd->tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
1610 D_TX("tx_cmd with AES hwcrypto\n");
1611 break;
1612
1613 case WLAN_CIPHER_SUITE_TKIP:
1614 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
1615 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
1616 D_TX("tx_cmd with tkip hwcrypto\n");
1617 break;
1618
1619 case WLAN_CIPHER_SUITE_WEP104:
1620 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
1621 fallthrough;
1622 case WLAN_CIPHER_SUITE_WEP40:
1623 tx_cmd->sec_ctl |=
1624 (TX_CMD_SEC_WEP | (keyconf->keyidx & TX_CMD_SEC_MSK) <<
1625 TX_CMD_SEC_SHIFT);
1626
1627 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
1628
1629 D_TX("Configuring packet for WEP encryption " "with key %d\n",
1630 keyconf->keyidx);
1631 break;
1632
1633 default:
1634 IL_ERR("Unknown encode cipher %x\n", keyconf->cipher);
1635 break;
1636 }
1637}
1638
1639/*
1640 * start C_TX command process
1641 */
1642int
1643il4965_tx_skb(struct il_priv *il,
1644 struct ieee80211_sta *sta,
1645 struct sk_buff *skb)
1646{
1647 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1648 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1649 struct il_station_priv *sta_priv = NULL;
1650 struct il_tx_queue *txq;
1651 struct il_queue *q;
1652 struct il_device_cmd *out_cmd;
1653 struct il_cmd_meta *out_meta;
1654 struct il_tx_cmd *tx_cmd;
1655 int txq_id;
1656 dma_addr_t phys_addr;
1657 dma_addr_t txcmd_phys;
1658 dma_addr_t scratch_phys;
1659 u16 len, firstlen, secondlen;
1660 u16 seq_number = 0;
1661 __le16 fc;
1662 u8 hdr_len;
1663 u8 sta_id;
1664 u8 wait_write_ptr = 0;
1665 u8 tid = 0;
1666 u8 *qc = NULL;
1667 unsigned long flags;
1668 bool is_agg = false;
1669
1670 spin_lock_irqsave(&il->lock, flags);
1671 if (il_is_rfkill(il)) {
1672 D_DROP("Dropping - RF KILL\n");
1673 goto drop_unlock;
1674 }
1675
1676 fc = hdr->frame_control;
1677
1678#ifdef CONFIG_IWLEGACY_DEBUG
1679 if (ieee80211_is_auth(fc))
1680 D_TX("Sending AUTH frame\n");
1681 else if (ieee80211_is_assoc_req(fc))
1682 D_TX("Sending ASSOC frame\n");
1683 else if (ieee80211_is_reassoc_req(fc))
1684 D_TX("Sending REASSOC frame\n");
1685#endif
1686
1687 hdr_len = ieee80211_hdrlen(fc);
1688
1689 /* For management frames use broadcast id to do not break aggregation */
1690 if (!ieee80211_is_data(fc))
1691 sta_id = il->hw_params.bcast_id;
1692 else {
1693 /* Find idx into station table for destination station */
1694 sta_id = il_sta_id_or_broadcast(il, sta);
1695
1696 if (sta_id == IL_INVALID_STATION) {
1697 D_DROP("Dropping - INVALID STATION: %pM\n", hdr->addr1);
1698 goto drop_unlock;
1699 }
1700 }
1701
1702 D_TX("station Id %d\n", sta_id);
1703
1704 if (sta)
1705 sta_priv = (void *)sta->drv_priv;
1706
1707 if (sta_priv && sta_priv->asleep &&
1708 (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER)) {
1709 /*
1710 * This sends an asynchronous command to the device,
1711 * but we can rely on it being processed before the
1712 * next frame is processed -- and the next frame to
1713 * this station is the one that will consume this
1714 * counter.
1715 * For now set the counter to just 1 since we do not
1716 * support uAPSD yet.
1717 */
1718 il4965_sta_modify_sleep_tx_count(il, sta_id, 1);
1719 }
1720
1721 /* FIXME: remove me ? */
1722 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
1723
1724 /* Access category (AC) is also the queue number */
1725 txq_id = skb_get_queue_mapping(skb);
1726
1727 /* irqs already disabled/saved above when locking il->lock */
1728 spin_lock(&il->sta_lock);
1729
1730 if (ieee80211_is_data_qos(fc)) {
1731 qc = ieee80211_get_qos_ctl(hdr);
1732 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
1733 if (WARN_ON_ONCE(tid >= MAX_TID_COUNT)) {
1734 spin_unlock(&il->sta_lock);
1735 goto drop_unlock;
1736 }
1737 seq_number = il->stations[sta_id].tid[tid].seq_number;
1738 seq_number &= IEEE80211_SCTL_SEQ;
1739 hdr->seq_ctrl =
1740 hdr->seq_ctrl & cpu_to_le16(IEEE80211_SCTL_FRAG);
1741 hdr->seq_ctrl |= cpu_to_le16(seq_number);
1742 seq_number += 0x10;
1743 /* aggregation is on for this <sta,tid> */
1744 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
1745 il->stations[sta_id].tid[tid].agg.state == IL_AGG_ON) {
1746 txq_id = il->stations[sta_id].tid[tid].agg.txq_id;
1747 is_agg = true;
1748 }
1749 }
1750
1751 txq = &il->txq[txq_id];
1752 q = &txq->q;
1753
1754 if (unlikely(il_queue_space(q) < q->high_mark)) {
1755 spin_unlock(&il->sta_lock);
1756 goto drop_unlock;
1757 }
1758
1759 if (ieee80211_is_data_qos(fc)) {
1760 il->stations[sta_id].tid[tid].tfds_in_queue++;
1761 if (!ieee80211_has_morefrags(fc))
1762 il->stations[sta_id].tid[tid].seq_number = seq_number;
1763 }
1764
1765 spin_unlock(&il->sta_lock);
1766
1767 txq->skbs[q->write_ptr] = skb;
1768
1769 /* Set up first empty entry in queue's array of Tx/cmd buffers */
1770 out_cmd = txq->cmd[q->write_ptr];
1771 out_meta = &txq->meta[q->write_ptr];
1772 tx_cmd = &out_cmd->cmd.tx;
1773 memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
1774 memset(tx_cmd, 0, sizeof(struct il_tx_cmd));
1775
1776 /*
1777 * Set up the Tx-command (not MAC!) header.
1778 * Store the chosen Tx queue and TFD idx within the sequence field;
1779 * after Tx, uCode's Tx response will return this value so driver can
1780 * locate the frame within the tx queue and do post-tx processing.
1781 */
1782 out_cmd->hdr.cmd = C_TX;
1783 out_cmd->hdr.sequence =
1784 cpu_to_le16((u16)
1785 (QUEUE_TO_SEQ(txq_id) | IDX_TO_SEQ(q->write_ptr)));
1786
1787 /* Copy MAC header from skb into command buffer */
1788 memcpy(tx_cmd->hdr, hdr, hdr_len);
1789
1790 /* Total # bytes to be transmitted */
1791 tx_cmd->len = cpu_to_le16((u16) skb->len);
1792
1793 if (info->control.hw_key)
1794 il4965_tx_cmd_build_hwcrypto(il, info, tx_cmd, skb, sta_id);
1795
1796 /* TODO need this for burst mode later on */
1797 il4965_tx_cmd_build_basic(il, skb, tx_cmd, info, hdr, sta_id);
1798
1799 il4965_tx_cmd_build_rate(il, tx_cmd, info, sta, fc);
1800
1801 /*
1802 * Use the first empty entry in this queue's command buffer array
1803 * to contain the Tx command and MAC header concatenated together
1804 * (payload data will be in another buffer).
1805 * Size of this varies, due to varying MAC header length.
1806 * If end is not dword aligned, we'll have 2 extra bytes at the end
1807 * of the MAC header (device reads on dword boundaries).
1808 * We'll tell device about this padding later.
1809 */
1810 len = sizeof(struct il_tx_cmd) + sizeof(struct il_cmd_header) + hdr_len;
1811 firstlen = (len + 3) & ~3;
1812
1813 /* Tell NIC about any 2-byte padding after MAC header */
1814 if (firstlen != len)
1815 tx_cmd->tx_flags |= TX_CMD_FLG_MH_PAD_MSK;
1816
1817 /* Physical address of this Tx command's header (not MAC header!),
1818 * within command buffer array. */
1819 txcmd_phys = dma_map_single(&il->pci_dev->dev, &out_cmd->hdr, firstlen,
1820 DMA_BIDIRECTIONAL);
1821 if (unlikely(dma_mapping_error(&il->pci_dev->dev, txcmd_phys)))
1822 goto drop_unlock;
1823
1824 /* Set up TFD's 2nd entry to point directly to remainder of skb,
1825 * if any (802.11 null frames have no payload). */
1826 secondlen = skb->len - hdr_len;
1827 if (secondlen > 0) {
1828 phys_addr = dma_map_single(&il->pci_dev->dev, skb->data + hdr_len,
1829 secondlen, DMA_TO_DEVICE);
1830 if (unlikely(dma_mapping_error(&il->pci_dev->dev, phys_addr)))
1831 goto drop_unlock;
1832 }
1833
1834 /* Add buffer containing Tx command and MAC(!) header to TFD's
1835 * first entry */
1836 il->ops->txq_attach_buf_to_tfd(il, txq, txcmd_phys, firstlen, 1, 0);
1837 dma_unmap_addr_set(out_meta, mapping, txcmd_phys);
1838 dma_unmap_len_set(out_meta, len, firstlen);
1839 if (secondlen)
1840 il->ops->txq_attach_buf_to_tfd(il, txq, phys_addr, secondlen,
1841 0, 0);
1842
1843 if (!ieee80211_has_morefrags(hdr->frame_control)) {
1844 txq->need_update = 1;
1845 } else {
1846 wait_write_ptr = 1;
1847 txq->need_update = 0;
1848 }
1849
1850 scratch_phys =
1851 txcmd_phys + sizeof(struct il_cmd_header) +
1852 offsetof(struct il_tx_cmd, scratch);
1853
1854 /* take back ownership of DMA buffer to enable update */
1855 dma_sync_single_for_cpu(&il->pci_dev->dev, txcmd_phys, firstlen,
1856 DMA_BIDIRECTIONAL);
1857 tx_cmd->dram_lsb_ptr = cpu_to_le32(scratch_phys);
1858 tx_cmd->dram_msb_ptr = il_get_dma_hi_addr(scratch_phys);
1859
1860 il_update_stats(il, true, fc, skb->len);
1861
1862 D_TX("sequence nr = 0X%x\n", le16_to_cpu(out_cmd->hdr.sequence));
1863 D_TX("tx_flags = 0X%x\n", le32_to_cpu(tx_cmd->tx_flags));
1864 il_print_hex_dump(il, IL_DL_TX, (u8 *) tx_cmd, sizeof(*tx_cmd));
1865 il_print_hex_dump(il, IL_DL_TX, (u8 *) tx_cmd->hdr, hdr_len);
1866
1867 /* Set up entry for this TFD in Tx byte-count array */
1868 if (info->flags & IEEE80211_TX_CTL_AMPDU)
1869 il->ops->txq_update_byte_cnt_tbl(il, txq, le16_to_cpu(tx_cmd->len));
1870
1871 dma_sync_single_for_device(&il->pci_dev->dev, txcmd_phys, firstlen,
1872 DMA_BIDIRECTIONAL);
1873
1874 /* Tell device the write idx *just past* this latest filled TFD */
1875 q->write_ptr = il_queue_inc_wrap(q->write_ptr, q->n_bd);
1876 il_txq_update_write_ptr(il, txq);
1877 spin_unlock_irqrestore(&il->lock, flags);
1878
1879 /*
1880 * At this point the frame is "transmitted" successfully
1881 * and we will get a TX status notification eventually,
1882 * regardless of the value of ret. "ret" only indicates
1883 * whether or not we should update the write pointer.
1884 */
1885
1886 /*
1887 * Avoid atomic ops if it isn't an associated client.
1888 * Also, if this is a packet for aggregation, don't
1889 * increase the counter because the ucode will stop
1890 * aggregation queues when their respective station
1891 * goes to sleep.
1892 */
1893 if (sta_priv && sta_priv->client && !is_agg)
1894 atomic_inc(&sta_priv->pending_frames);
1895
1896 if (il_queue_space(q) < q->high_mark && il->mac80211_registered) {
1897 if (wait_write_ptr) {
1898 spin_lock_irqsave(&il->lock, flags);
1899 txq->need_update = 1;
1900 il_txq_update_write_ptr(il, txq);
1901 spin_unlock_irqrestore(&il->lock, flags);
1902 } else {
1903 il_stop_queue(il, txq);
1904 }
1905 }
1906
1907 return 0;
1908
1909drop_unlock:
1910 spin_unlock_irqrestore(&il->lock, flags);
1911 return -1;
1912}
1913
1914static inline int
1915il4965_alloc_dma_ptr(struct il_priv *il, struct il_dma_ptr *ptr, size_t size)
1916{
1917 ptr->addr = dma_alloc_coherent(&il->pci_dev->dev, size, &ptr->dma,
1918 GFP_KERNEL);
1919 if (!ptr->addr)
1920 return -ENOMEM;
1921 ptr->size = size;
1922 return 0;
1923}
1924
1925static inline void
1926il4965_free_dma_ptr(struct il_priv *il, struct il_dma_ptr *ptr)
1927{
1928 if (unlikely(!ptr->addr))
1929 return;
1930
1931 dma_free_coherent(&il->pci_dev->dev, ptr->size, ptr->addr, ptr->dma);
1932 memset(ptr, 0, sizeof(*ptr));
1933}
1934
1935/*
1936 * il4965_hw_txq_ctx_free - Free TXQ Context
1937 *
1938 * Destroy all TX DMA queues and structures
1939 */
1940void
1941il4965_hw_txq_ctx_free(struct il_priv *il)
1942{
1943 int txq_id;
1944
1945 /* Tx queues */
1946 if (il->txq) {
1947 for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++)
1948 if (txq_id == il->cmd_queue)
1949 il_cmd_queue_free(il);
1950 else
1951 il_tx_queue_free(il, txq_id);
1952 }
1953 il4965_free_dma_ptr(il, &il->kw);
1954
1955 il4965_free_dma_ptr(il, &il->scd_bc_tbls);
1956
1957 /* free tx queue structure */
1958 il_free_txq_mem(il);
1959}
1960
1961/*
1962 * il4965_txq_ctx_alloc - allocate TX queue context
1963 * Allocate all Tx DMA structures and initialize them
1964 */
1965int
1966il4965_txq_ctx_alloc(struct il_priv *il)
1967{
1968 int ret, txq_id;
1969 unsigned long flags;
1970
1971 /* Free all tx/cmd queues and keep-warm buffer */
1972 il4965_hw_txq_ctx_free(il);
1973
1974 ret =
1975 il4965_alloc_dma_ptr(il, &il->scd_bc_tbls,
1976 il->hw_params.scd_bc_tbls_size);
1977 if (ret) {
1978 IL_ERR("Scheduler BC Table allocation failed\n");
1979 goto error_bc_tbls;
1980 }
1981 /* Alloc keep-warm buffer */
1982 ret = il4965_alloc_dma_ptr(il, &il->kw, IL_KW_SIZE);
1983 if (ret) {
1984 IL_ERR("Keep Warm allocation failed\n");
1985 goto error_kw;
1986 }
1987
1988 /* allocate tx queue structure */
1989 ret = il_alloc_txq_mem(il);
1990 if (ret)
1991 goto error;
1992
1993 spin_lock_irqsave(&il->lock, flags);
1994
1995 /* Turn off all Tx DMA fifos */
1996 il4965_txq_set_sched(il, 0);
1997
1998 /* Tell NIC where to find the "keep warm" buffer */
1999 il_wr(il, FH49_KW_MEM_ADDR_REG, il->kw.dma >> 4);
2000
2001 spin_unlock_irqrestore(&il->lock, flags);
2002
2003 /* Alloc and init all Tx queues, including the command queue (#4/#9) */
2004 for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++) {
2005 ret = il_tx_queue_init(il, txq_id);
2006 if (ret) {
2007 IL_ERR("Tx %d queue init failed\n", txq_id);
2008 goto error;
2009 }
2010 }
2011
2012 return ret;
2013
2014error:
2015 il4965_hw_txq_ctx_free(il);
2016 il4965_free_dma_ptr(il, &il->kw);
2017error_kw:
2018 il4965_free_dma_ptr(il, &il->scd_bc_tbls);
2019error_bc_tbls:
2020 return ret;
2021}
2022
2023void
2024il4965_txq_ctx_reset(struct il_priv *il)
2025{
2026 int txq_id;
2027 unsigned long flags;
2028
2029 spin_lock_irqsave(&il->lock, flags);
2030
2031 /* Turn off all Tx DMA fifos */
2032 il4965_txq_set_sched(il, 0);
2033 /* Tell NIC where to find the "keep warm" buffer */
2034 il_wr(il, FH49_KW_MEM_ADDR_REG, il->kw.dma >> 4);
2035
2036 spin_unlock_irqrestore(&il->lock, flags);
2037
2038 /* Alloc and init all Tx queues, including the command queue (#4) */
2039 for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++)
2040 il_tx_queue_reset(il, txq_id);
2041}
2042
2043static void
2044il4965_txq_ctx_unmap(struct il_priv *il)
2045{
2046 int txq_id;
2047
2048 if (!il->txq)
2049 return;
2050
2051 /* Unmap DMA from host system and free skb's */
2052 for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++)
2053 if (txq_id == il->cmd_queue)
2054 il_cmd_queue_unmap(il);
2055 else
2056 il_tx_queue_unmap(il, txq_id);
2057}
2058
2059/*
2060 * il4965_txq_ctx_stop - Stop all Tx DMA channels
2061 */
2062void
2063il4965_txq_ctx_stop(struct il_priv *il)
2064{
2065 int ch, ret;
2066
2067 _il_wr_prph(il, IL49_SCD_TXFACT, 0);
2068
2069 /* Stop each Tx DMA channel, and wait for it to be idle */
2070 for (ch = 0; ch < il->hw_params.dma_chnl_num; ch++) {
2071 _il_wr(il, FH49_TCSR_CHNL_TX_CONFIG_REG(ch), 0x0);
2072 ret =
2073 _il_poll_bit(il, FH49_TSSR_TX_STATUS_REG,
2074 FH49_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(ch),
2075 FH49_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(ch),
2076 1000);
2077 if (ret < 0)
2078 IL_ERR("Timeout stopping DMA channel %d [0x%08x]",
2079 ch, _il_rd(il, FH49_TSSR_TX_STATUS_REG));
2080 }
2081}
2082
2083/*
2084 * Find first available (lowest unused) Tx Queue, mark it "active".
2085 * Called only when finding queue for aggregation.
2086 * Should never return anything < 7, because they should already
2087 * be in use as EDCA AC (0-3), Command (4), reserved (5, 6)
2088 */
2089static int
2090il4965_txq_ctx_activate_free(struct il_priv *il)
2091{
2092 int txq_id;
2093
2094 for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++)
2095 if (!test_and_set_bit(txq_id, &il->txq_ctx_active_msk))
2096 return txq_id;
2097 return -1;
2098}
2099
2100/*
2101 * il4965_tx_queue_stop_scheduler - Stop queue, but keep configuration
2102 */
2103static void
2104il4965_tx_queue_stop_scheduler(struct il_priv *il, u16 txq_id)
2105{
2106 /* Simply stop the queue, but don't change any configuration;
2107 * the SCD_ACT_EN bit is the write-enable mask for the ACTIVE bit. */
2108 il_wr_prph(il, IL49_SCD_QUEUE_STATUS_BITS(txq_id),
2109 (0 << IL49_SCD_QUEUE_STTS_REG_POS_ACTIVE) |
2110 (1 << IL49_SCD_QUEUE_STTS_REG_POS_SCD_ACT_EN));
2111}
2112
2113/*
2114 * il4965_tx_queue_set_q2ratid - Map unique receiver/tid combination to a queue
2115 */
2116static int
2117il4965_tx_queue_set_q2ratid(struct il_priv *il, u16 ra_tid, u16 txq_id)
2118{
2119 u32 tbl_dw_addr;
2120 u32 tbl_dw;
2121 u16 scd_q2ratid;
2122
2123 scd_q2ratid = ra_tid & IL_SCD_QUEUE_RA_TID_MAP_RATID_MSK;
2124
2125 tbl_dw_addr =
2126 il->scd_base_addr + IL49_SCD_TRANSLATE_TBL_OFFSET_QUEUE(txq_id);
2127
2128 tbl_dw = il_read_targ_mem(il, tbl_dw_addr);
2129
2130 if (txq_id & 0x1)
2131 tbl_dw = (scd_q2ratid << 16) | (tbl_dw & 0x0000FFFF);
2132 else
2133 tbl_dw = scd_q2ratid | (tbl_dw & 0xFFFF0000);
2134
2135 il_write_targ_mem(il, tbl_dw_addr, tbl_dw);
2136
2137 return 0;
2138}
2139
2140/*
2141 * il4965_tx_queue_agg_enable - Set up & enable aggregation for selected queue
2142 *
2143 * NOTE: txq_id must be greater than IL49_FIRST_AMPDU_QUEUE,
2144 * i.e. it must be one of the higher queues used for aggregation
2145 */
2146static int
2147il4965_txq_agg_enable(struct il_priv *il, int txq_id, int tx_fifo, int sta_id,
2148 int tid, u16 ssn_idx)
2149{
2150 unsigned long flags;
2151 u16 ra_tid;
2152 int ret;
2153
2154 if ((IL49_FIRST_AMPDU_QUEUE > txq_id) ||
2155 (IL49_FIRST_AMPDU_QUEUE +
2156 il->cfg->num_of_ampdu_queues <= txq_id)) {
2157 IL_WARN("queue number out of range: %d, must be %d to %d\n",
2158 txq_id, IL49_FIRST_AMPDU_QUEUE,
2159 IL49_FIRST_AMPDU_QUEUE +
2160 il->cfg->num_of_ampdu_queues - 1);
2161 return -EINVAL;
2162 }
2163
2164 ra_tid = BUILD_RAxTID(sta_id, tid);
2165
2166 /* Modify device's station table to Tx this TID */
2167 ret = il4965_sta_tx_modify_enable_tid(il, sta_id, tid);
2168 if (ret)
2169 return ret;
2170
2171 spin_lock_irqsave(&il->lock, flags);
2172
2173 /* Stop this Tx queue before configuring it */
2174 il4965_tx_queue_stop_scheduler(il, txq_id);
2175
2176 /* Map receiver-address / traffic-ID to this queue */
2177 il4965_tx_queue_set_q2ratid(il, ra_tid, txq_id);
2178
2179 /* Set this queue as a chain-building queue */
2180 il_set_bits_prph(il, IL49_SCD_QUEUECHAIN_SEL, (1 << txq_id));
2181
2182 /* Place first TFD at idx corresponding to start sequence number.
2183 * Assumes that ssn_idx is valid (!= 0xFFF) */
2184 il->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
2185 il->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
2186 il4965_set_wr_ptrs(il, txq_id, ssn_idx);
2187
2188 /* Set up Tx win size and frame limit for this queue */
2189 il_write_targ_mem(il,
2190 il->scd_base_addr +
2191 IL49_SCD_CONTEXT_QUEUE_OFFSET(txq_id),
2192 (SCD_WIN_SIZE << IL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_POS)
2193 & IL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
2194
2195 il_write_targ_mem(il,
2196 il->scd_base_addr +
2197 IL49_SCD_CONTEXT_QUEUE_OFFSET(txq_id) + sizeof(u32),
2198 (SCD_FRAME_LIMIT <<
2199 IL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) &
2200 IL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
2201
2202 il_set_bits_prph(il, IL49_SCD_INTERRUPT_MASK, (1 << txq_id));
2203
2204 /* Set up Status area in SRAM, map to Tx DMA/FIFO, activate the queue */
2205 il4965_tx_queue_set_status(il, &il->txq[txq_id], tx_fifo, 1);
2206
2207 spin_unlock_irqrestore(&il->lock, flags);
2208
2209 return 0;
2210}
2211
2212int
2213il4965_tx_agg_start(struct il_priv *il, struct ieee80211_vif *vif,
2214 struct ieee80211_sta *sta, u16 tid, u16 * ssn)
2215{
2216 int sta_id;
2217 int tx_fifo;
2218 int txq_id;
2219 int ret;
2220 unsigned long flags;
2221 struct il_tid_data *tid_data;
2222
2223 /* FIXME: warning if tx fifo not found ? */
2224 tx_fifo = il4965_get_fifo_from_tid(tid);
2225 if (unlikely(tx_fifo < 0))
2226 return tx_fifo;
2227
2228 D_HT("%s on ra = %pM tid = %d\n", __func__, sta->addr, tid);
2229
2230 sta_id = il_sta_id(sta);
2231 if (sta_id == IL_INVALID_STATION) {
2232 IL_ERR("Start AGG on invalid station\n");
2233 return -ENXIO;
2234 }
2235 if (unlikely(tid >= MAX_TID_COUNT))
2236 return -EINVAL;
2237
2238 if (il->stations[sta_id].tid[tid].agg.state != IL_AGG_OFF) {
2239 IL_ERR("Start AGG when state is not IL_AGG_OFF !\n");
2240 return -ENXIO;
2241 }
2242
2243 txq_id = il4965_txq_ctx_activate_free(il);
2244 if (txq_id == -1) {
2245 IL_ERR("No free aggregation queue available\n");
2246 return -ENXIO;
2247 }
2248
2249 spin_lock_irqsave(&il->sta_lock, flags);
2250 tid_data = &il->stations[sta_id].tid[tid];
2251 *ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
2252 tid_data->agg.txq_id = txq_id;
2253 il_set_swq_id(&il->txq[txq_id], il4965_get_ac_from_tid(tid), txq_id);
2254 spin_unlock_irqrestore(&il->sta_lock, flags);
2255
2256 ret = il4965_txq_agg_enable(il, txq_id, tx_fifo, sta_id, tid, *ssn);
2257 if (ret)
2258 return ret;
2259
2260 spin_lock_irqsave(&il->sta_lock, flags);
2261 tid_data = &il->stations[sta_id].tid[tid];
2262 if (tid_data->tfds_in_queue == 0) {
2263 D_HT("HW queue is empty\n");
2264 tid_data->agg.state = IL_AGG_ON;
2265 ret = IEEE80211_AMPDU_TX_START_IMMEDIATE;
2266 } else {
2267 D_HT("HW queue is NOT empty: %d packets in HW queue\n",
2268 tid_data->tfds_in_queue);
2269 tid_data->agg.state = IL_EMPTYING_HW_QUEUE_ADDBA;
2270 }
2271 spin_unlock_irqrestore(&il->sta_lock, flags);
2272 return ret;
2273}
2274
2275/*
2276 * txq_id must be greater than IL49_FIRST_AMPDU_QUEUE
2277 * il->lock must be held by the caller
2278 */
2279static int
2280il4965_txq_agg_disable(struct il_priv *il, u16 txq_id, u16 ssn_idx, u8 tx_fifo)
2281{
2282 if ((IL49_FIRST_AMPDU_QUEUE > txq_id) ||
2283 (IL49_FIRST_AMPDU_QUEUE +
2284 il->cfg->num_of_ampdu_queues <= txq_id)) {
2285 IL_WARN("queue number out of range: %d, must be %d to %d\n",
2286 txq_id, IL49_FIRST_AMPDU_QUEUE,
2287 IL49_FIRST_AMPDU_QUEUE +
2288 il->cfg->num_of_ampdu_queues - 1);
2289 return -EINVAL;
2290 }
2291
2292 il4965_tx_queue_stop_scheduler(il, txq_id);
2293
2294 il_clear_bits_prph(il, IL49_SCD_QUEUECHAIN_SEL, (1 << txq_id));
2295
2296 il->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
2297 il->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
2298 /* supposes that ssn_idx is valid (!= 0xFFF) */
2299 il4965_set_wr_ptrs(il, txq_id, ssn_idx);
2300
2301 il_clear_bits_prph(il, IL49_SCD_INTERRUPT_MASK, (1 << txq_id));
2302 il_txq_ctx_deactivate(il, txq_id);
2303 il4965_tx_queue_set_status(il, &il->txq[txq_id], tx_fifo, 0);
2304
2305 return 0;
2306}
2307
2308int
2309il4965_tx_agg_stop(struct il_priv *il, struct ieee80211_vif *vif,
2310 struct ieee80211_sta *sta, u16 tid)
2311{
2312 int tx_fifo_id, txq_id, sta_id, ssn;
2313 struct il_tid_data *tid_data;
2314 int write_ptr, read_ptr;
2315 unsigned long flags;
2316
2317 /* FIXME: warning if tx_fifo_id not found ? */
2318 tx_fifo_id = il4965_get_fifo_from_tid(tid);
2319 if (unlikely(tx_fifo_id < 0))
2320 return tx_fifo_id;
2321
2322 sta_id = il_sta_id(sta);
2323
2324 if (sta_id == IL_INVALID_STATION) {
2325 IL_ERR("Invalid station for AGG tid %d\n", tid);
2326 return -ENXIO;
2327 }
2328
2329 spin_lock_irqsave(&il->sta_lock, flags);
2330
2331 tid_data = &il->stations[sta_id].tid[tid];
2332 ssn = (tid_data->seq_number & IEEE80211_SCTL_SEQ) >> 4;
2333 txq_id = tid_data->agg.txq_id;
2334
2335 switch (il->stations[sta_id].tid[tid].agg.state) {
2336 case IL_EMPTYING_HW_QUEUE_ADDBA:
2337 /*
2338 * This can happen if the peer stops aggregation
2339 * again before we've had a chance to drain the
2340 * queue we selected previously, i.e. before the
2341 * session was really started completely.
2342 */
2343 D_HT("AGG stop before setup done\n");
2344 goto turn_off;
2345 case IL_AGG_ON:
2346 break;
2347 default:
2348 IL_WARN("Stopping AGG while state not ON or starting\n");
2349 }
2350
2351 write_ptr = il->txq[txq_id].q.write_ptr;
2352 read_ptr = il->txq[txq_id].q.read_ptr;
2353
2354 /* The queue is not empty */
2355 if (write_ptr != read_ptr) {
2356 D_HT("Stopping a non empty AGG HW QUEUE\n");
2357 il->stations[sta_id].tid[tid].agg.state =
2358 IL_EMPTYING_HW_QUEUE_DELBA;
2359 spin_unlock_irqrestore(&il->sta_lock, flags);
2360 return 0;
2361 }
2362
2363 D_HT("HW queue is empty\n");
2364turn_off:
2365 il->stations[sta_id].tid[tid].agg.state = IL_AGG_OFF;
2366
2367 /* do not restore/save irqs */
2368 spin_unlock(&il->sta_lock);
2369 spin_lock(&il->lock);
2370
2371 /*
2372 * the only reason this call can fail is queue number out of range,
2373 * which can happen if uCode is reloaded and all the station
2374 * information are lost. if it is outside the range, there is no need
2375 * to deactivate the uCode queue, just return "success" to allow
2376 * mac80211 to clean up it own data.
2377 */
2378 il4965_txq_agg_disable(il, txq_id, ssn, tx_fifo_id);
2379 spin_unlock_irqrestore(&il->lock, flags);
2380
2381 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2382
2383 return 0;
2384}
2385
2386int
2387il4965_txq_check_empty(struct il_priv *il, int sta_id, u8 tid, int txq_id)
2388{
2389 struct il_queue *q = &il->txq[txq_id].q;
2390 u8 *addr = il->stations[sta_id].sta.sta.addr;
2391 struct il_tid_data *tid_data = &il->stations[sta_id].tid[tid];
2392
2393 lockdep_assert_held(&il->sta_lock);
2394
2395 switch (il->stations[sta_id].tid[tid].agg.state) {
2396 case IL_EMPTYING_HW_QUEUE_DELBA:
2397 /* We are reclaiming the last packet of the */
2398 /* aggregated HW queue */
2399 if (txq_id == tid_data->agg.txq_id &&
2400 q->read_ptr == q->write_ptr) {
2401 u16 ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
2402 int tx_fifo = il4965_get_fifo_from_tid(tid);
2403 D_HT("HW queue empty: continue DELBA flow\n");
2404 il4965_txq_agg_disable(il, txq_id, ssn, tx_fifo);
2405 tid_data->agg.state = IL_AGG_OFF;
2406 ieee80211_stop_tx_ba_cb_irqsafe(il->vif, addr, tid);
2407 }
2408 break;
2409 case IL_EMPTYING_HW_QUEUE_ADDBA:
2410 /* We are reclaiming the last packet of the queue */
2411 if (tid_data->tfds_in_queue == 0) {
2412 D_HT("HW queue empty: continue ADDBA flow\n");
2413 tid_data->agg.state = IL_AGG_ON;
2414 ieee80211_start_tx_ba_cb_irqsafe(il->vif, addr, tid);
2415 }
2416 break;
2417 }
2418
2419 return 0;
2420}
2421
2422static void
2423il4965_non_agg_tx_status(struct il_priv *il, const u8 *addr1)
2424{
2425 struct ieee80211_sta *sta;
2426 struct il_station_priv *sta_priv;
2427
2428 rcu_read_lock();
2429 sta = ieee80211_find_sta(il->vif, addr1);
2430 if (sta) {
2431 sta_priv = (void *)sta->drv_priv;
2432 /* avoid atomic ops if this isn't a client */
2433 if (sta_priv->client &&
2434 atomic_dec_return(&sta_priv->pending_frames) == 0)
2435 ieee80211_sta_block_awake(il->hw, sta, false);
2436 }
2437 rcu_read_unlock();
2438}
2439
2440static void
2441il4965_tx_status(struct il_priv *il, struct sk_buff *skb, bool is_agg)
2442{
2443 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2444
2445 if (!is_agg)
2446 il4965_non_agg_tx_status(il, hdr->addr1);
2447
2448 ieee80211_tx_status_irqsafe(il->hw, skb);
2449}
2450
2451int
2452il4965_tx_queue_reclaim(struct il_priv *il, int txq_id, int idx)
2453{
2454 struct il_tx_queue *txq = &il->txq[txq_id];
2455 struct il_queue *q = &txq->q;
2456 int nfreed = 0;
2457 struct ieee80211_hdr *hdr;
2458 struct sk_buff *skb;
2459
2460 if (idx >= q->n_bd || il_queue_used(q, idx) == 0) {
2461 IL_ERR("Read idx for DMA queue txq id (%d), idx %d, "
2462 "is out of range [0-%d] %d %d.\n", txq_id, idx, q->n_bd,
2463 q->write_ptr, q->read_ptr);
2464 return 0;
2465 }
2466
2467 for (idx = il_queue_inc_wrap(idx, q->n_bd); q->read_ptr != idx;
2468 q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd)) {
2469
2470 skb = txq->skbs[txq->q.read_ptr];
2471
2472 if (WARN_ON_ONCE(skb == NULL))
2473 continue;
2474
2475 hdr = (struct ieee80211_hdr *) skb->data;
2476 if (ieee80211_is_data_qos(hdr->frame_control))
2477 nfreed++;
2478
2479 il4965_tx_status(il, skb, txq_id >= IL4965_FIRST_AMPDU_QUEUE);
2480
2481 txq->skbs[txq->q.read_ptr] = NULL;
2482 il->ops->txq_free_tfd(il, txq);
2483 }
2484 return nfreed;
2485}
2486
2487/*
2488 * il4965_tx_status_reply_compressed_ba - Update tx status from block-ack
2489 *
2490 * Go through block-ack's bitmap of ACK'd frames, update driver's record of
2491 * ACK vs. not. This gets sent to mac80211, then to rate scaling algo.
2492 */
2493static int
2494il4965_tx_status_reply_compressed_ba(struct il_priv *il, struct il_ht_agg *agg,
2495 struct il_compressed_ba_resp *ba_resp)
2496{
2497 int i, sh, ack;
2498 u16 seq_ctl = le16_to_cpu(ba_resp->seq_ctl);
2499 u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
2500 int successes = 0;
2501 struct ieee80211_tx_info *info;
2502 u64 bitmap, sent_bitmap;
2503
2504 if (unlikely(!agg->wait_for_ba)) {
2505 if (unlikely(ba_resp->bitmap))
2506 IL_ERR("Received BA when not expected\n");
2507 return -EINVAL;
2508 }
2509
2510 /* Mark that the expected block-ack response arrived */
2511 agg->wait_for_ba = 0;
2512 D_TX_REPLY("BA %d %d\n", agg->start_idx, ba_resp->seq_ctl);
2513
2514 /* Calculate shift to align block-ack bits with our Tx win bits */
2515 sh = agg->start_idx - SEQ_TO_IDX(seq_ctl >> 4);
2516 if (sh < 0) /* tbw something is wrong with indices */
2517 sh += 0x100;
2518
2519 if (agg->frame_count > (64 - sh)) {
2520 D_TX_REPLY("more frames than bitmap size");
2521 return -1;
2522 }
2523
2524 /* don't use 64-bit values for now */
2525 bitmap = le64_to_cpu(ba_resp->bitmap) >> sh;
2526
2527 /* check for success or failure according to the
2528 * transmitted bitmap and block-ack bitmap */
2529 sent_bitmap = bitmap & agg->bitmap;
2530
2531 /* For each frame attempted in aggregation,
2532 * update driver's record of tx frame's status. */
2533 i = 0;
2534 while (sent_bitmap) {
2535 ack = sent_bitmap & 1ULL;
2536 successes += ack;
2537 D_TX_REPLY("%s ON i=%d idx=%d raw=%d\n", ack ? "ACK" : "NACK",
2538 i, (agg->start_idx + i) & 0xff, agg->start_idx + i);
2539 sent_bitmap >>= 1;
2540 ++i;
2541 }
2542
2543 D_TX_REPLY("Bitmap %llx\n", (unsigned long long)bitmap);
2544
2545 info = IEEE80211_SKB_CB(il->txq[scd_flow].skbs[agg->start_idx]);
2546 memset(&info->status, 0, sizeof(info->status));
2547 info->flags |= IEEE80211_TX_STAT_ACK;
2548 info->flags |= IEEE80211_TX_STAT_AMPDU;
2549 info->status.ampdu_ack_len = successes;
2550 info->status.ampdu_len = agg->frame_count;
2551 il4965_hwrate_to_tx_control(il, agg->rate_n_flags, info);
2552
2553 return 0;
2554}
2555
2556static inline bool
2557il4965_is_tx_success(u32 status)
2558{
2559 status &= TX_STATUS_MSK;
2560 return (status == TX_STATUS_SUCCESS || status == TX_STATUS_DIRECT_DONE);
2561}
2562
2563static u8
2564il4965_find_station(struct il_priv *il, const u8 *addr)
2565{
2566 int i;
2567 int start = 0;
2568 int ret = IL_INVALID_STATION;
2569 unsigned long flags;
2570
2571 if (il->iw_mode == NL80211_IFTYPE_ADHOC)
2572 start = IL_STA_ID;
2573
2574 if (is_broadcast_ether_addr(addr))
2575 return il->hw_params.bcast_id;
2576
2577 spin_lock_irqsave(&il->sta_lock, flags);
2578 for (i = start; i < il->hw_params.max_stations; i++)
2579 if (il->stations[i].used &&
2580 ether_addr_equal(il->stations[i].sta.sta.addr, addr)) {
2581 ret = i;
2582 goto out;
2583 }
2584
2585 D_ASSOC("can not find STA %pM total %d\n", addr, il->num_stations);
2586
2587out:
2588 /*
2589 * It may be possible that more commands interacting with stations
2590 * arrive before we completed processing the adding of
2591 * station
2592 */
2593 if (ret != IL_INVALID_STATION &&
2594 (!(il->stations[ret].used & IL_STA_UCODE_ACTIVE) ||
2595 (il->stations[ret].used & IL_STA_UCODE_INPROGRESS))) {
2596 IL_ERR("Requested station info for sta %d before ready.\n",
2597 ret);
2598 ret = IL_INVALID_STATION;
2599 }
2600 spin_unlock_irqrestore(&il->sta_lock, flags);
2601 return ret;
2602}
2603
2604static int
2605il4965_get_ra_sta_id(struct il_priv *il, struct ieee80211_hdr *hdr)
2606{
2607 if (il->iw_mode == NL80211_IFTYPE_STATION)
2608 return IL_AP_ID;
2609 else {
2610 u8 *da = ieee80211_get_DA(hdr);
2611
2612 return il4965_find_station(il, da);
2613 }
2614}
2615
2616static inline u32
2617il4965_get_scd_ssn(struct il4965_tx_resp *tx_resp)
2618{
2619 return le32_to_cpup(&tx_resp->u.status +
2620 tx_resp->frame_count) & IEEE80211_MAX_SN;
2621}
2622
2623static inline u32
2624il4965_tx_status_to_mac80211(u32 status)
2625{
2626 status &= TX_STATUS_MSK;
2627
2628 switch (status) {
2629 case TX_STATUS_SUCCESS:
2630 case TX_STATUS_DIRECT_DONE:
2631 return IEEE80211_TX_STAT_ACK;
2632 case TX_STATUS_FAIL_DEST_PS:
2633 return IEEE80211_TX_STAT_TX_FILTERED;
2634 default:
2635 return 0;
2636 }
2637}
2638
2639/*
2640 * il4965_tx_status_reply_tx - Handle Tx response for frames in aggregation queue
2641 */
2642static int
2643il4965_tx_status_reply_tx(struct il_priv *il, struct il_ht_agg *agg,
2644 struct il4965_tx_resp *tx_resp, int txq_id,
2645 u16 start_idx)
2646{
2647 u16 status;
2648 struct agg_tx_status *frame_status = tx_resp->u.agg_status;
2649 struct ieee80211_tx_info *info = NULL;
2650 struct ieee80211_hdr *hdr = NULL;
2651 u32 rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
2652 int i, sh, idx;
2653 u16 seq;
2654 if (agg->wait_for_ba)
2655 D_TX_REPLY("got tx response w/o block-ack\n");
2656
2657 agg->frame_count = tx_resp->frame_count;
2658 agg->start_idx = start_idx;
2659 agg->rate_n_flags = rate_n_flags;
2660 agg->bitmap = 0;
2661
2662 /* num frames attempted by Tx command */
2663 if (agg->frame_count == 1) {
2664 /* Only one frame was attempted; no block-ack will arrive */
2665 status = le16_to_cpu(frame_status[0].status);
2666 idx = start_idx;
2667
2668 D_TX_REPLY("FrameCnt = %d, StartIdx=%d idx=%d\n",
2669 agg->frame_count, agg->start_idx, idx);
2670
2671 info = IEEE80211_SKB_CB(il->txq[txq_id].skbs[idx]);
2672 info->status.rates[0].count = tx_resp->failure_frame + 1;
2673 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
2674 info->flags |= il4965_tx_status_to_mac80211(status);
2675 il4965_hwrate_to_tx_control(il, rate_n_flags, info);
2676
2677 D_TX_REPLY("1 Frame 0x%x failure :%d\n", status & 0xff,
2678 tx_resp->failure_frame);
2679 D_TX_REPLY("Rate Info rate_n_flags=%x\n", rate_n_flags);
2680
2681 agg->wait_for_ba = 0;
2682 } else {
2683 /* Two or more frames were attempted; expect block-ack */
2684 u64 bitmap = 0;
2685 int start = agg->start_idx;
2686 struct sk_buff *skb;
2687
2688 /* Construct bit-map of pending frames within Tx win */
2689 for (i = 0; i < agg->frame_count; i++) {
2690 u16 sc;
2691 status = le16_to_cpu(frame_status[i].status);
2692 seq = le16_to_cpu(frame_status[i].sequence);
2693 idx = SEQ_TO_IDX(seq);
2694 txq_id = SEQ_TO_QUEUE(seq);
2695
2696 if (status &
2697 (AGG_TX_STATE_FEW_BYTES_MSK |
2698 AGG_TX_STATE_ABORT_MSK))
2699 continue;
2700
2701 D_TX_REPLY("FrameCnt = %d, txq_id=%d idx=%d\n",
2702 agg->frame_count, txq_id, idx);
2703
2704 skb = il->txq[txq_id].skbs[idx];
2705 if (WARN_ON_ONCE(skb == NULL))
2706 return -1;
2707 hdr = (struct ieee80211_hdr *) skb->data;
2708
2709 sc = le16_to_cpu(hdr->seq_ctrl);
2710 if (idx != (IEEE80211_SEQ_TO_SN(sc) & 0xff)) {
2711 IL_ERR("BUG_ON idx doesn't match seq control"
2712 " idx=%d, seq_idx=%d, seq=%d\n", idx,
2713 IEEE80211_SEQ_TO_SN(sc), hdr->seq_ctrl);
2714 return -1;
2715 }
2716
2717 D_TX_REPLY("AGG Frame i=%d idx %d seq=%d\n", i, idx,
2718 IEEE80211_SEQ_TO_SN(sc));
2719
2720 sh = idx - start;
2721 if (sh > 64) {
2722 sh = (start - idx) + 0xff;
2723 bitmap = bitmap << sh;
2724 sh = 0;
2725 start = idx;
2726 } else if (sh < -64)
2727 sh = 0xff - (start - idx);
2728 else if (sh < 0) {
2729 sh = start - idx;
2730 start = idx;
2731 bitmap = bitmap << sh;
2732 sh = 0;
2733 }
2734 bitmap |= 1ULL << sh;
2735 D_TX_REPLY("start=%d bitmap=0x%llx\n", start,
2736 (unsigned long long)bitmap);
2737 }
2738
2739 agg->bitmap = bitmap;
2740 agg->start_idx = start;
2741 D_TX_REPLY("Frames %d start_idx=%d bitmap=0x%llx\n",
2742 agg->frame_count, agg->start_idx,
2743 (unsigned long long)agg->bitmap);
2744
2745 if (bitmap)
2746 agg->wait_for_ba = 1;
2747 }
2748 return 0;
2749}
2750
2751/*
2752 * il4965_hdl_tx - Handle standard (non-aggregation) Tx response
2753 */
2754static void
2755il4965_hdl_tx(struct il_priv *il, struct il_rx_buf *rxb)
2756{
2757 struct il_rx_pkt *pkt = rxb_addr(rxb);
2758 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
2759 int txq_id = SEQ_TO_QUEUE(sequence);
2760 int idx = SEQ_TO_IDX(sequence);
2761 struct il_tx_queue *txq = &il->txq[txq_id];
2762 struct sk_buff *skb;
2763 struct ieee80211_hdr *hdr;
2764 struct ieee80211_tx_info *info;
2765 struct il4965_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
2766 u32 status = le32_to_cpu(tx_resp->u.status);
2767 int tid;
2768 int sta_id;
2769 int freed;
2770 u8 *qc = NULL;
2771 unsigned long flags;
2772
2773 if (idx >= txq->q.n_bd || il_queue_used(&txq->q, idx) == 0) {
2774 IL_ERR("Read idx for DMA queue txq_id (%d) idx %d "
2775 "is out of range [0-%d] %d %d\n", txq_id, idx,
2776 txq->q.n_bd, txq->q.write_ptr, txq->q.read_ptr);
2777 return;
2778 }
2779
2780 txq->time_stamp = jiffies;
2781
2782 skb = txq->skbs[txq->q.read_ptr];
2783 info = IEEE80211_SKB_CB(skb);
2784 memset(&info->status, 0, sizeof(info->status));
2785
2786 hdr = (struct ieee80211_hdr *) skb->data;
2787 if (ieee80211_is_data_qos(hdr->frame_control)) {
2788 qc = ieee80211_get_qos_ctl(hdr);
2789 tid = qc[0] & 0xf;
2790 }
2791
2792 sta_id = il4965_get_ra_sta_id(il, hdr);
2793 if (txq->sched_retry && unlikely(sta_id == IL_INVALID_STATION)) {
2794 IL_ERR("Station not known\n");
2795 return;
2796 }
2797
2798 /*
2799 * Firmware will not transmit frame on passive channel, if it not yet
2800 * received some valid frame on that channel. When this error happen
2801 * we have to wait until firmware will unblock itself i.e. when we
2802 * note received beacon or other frame. We unblock queues in
2803 * il4965_pass_packet_to_mac80211 or in il_mac_bss_info_changed.
2804 */
2805 if (unlikely((status & TX_STATUS_MSK) == TX_STATUS_FAIL_PASSIVE_NO_RX) &&
2806 il->iw_mode == NL80211_IFTYPE_STATION) {
2807 il_stop_queues_by_reason(il, IL_STOP_REASON_PASSIVE);
2808 D_INFO("Stopped queues - RX waiting on passive channel\n");
2809 }
2810
2811 spin_lock_irqsave(&il->sta_lock, flags);
2812 if (txq->sched_retry) {
2813 const u32 scd_ssn = il4965_get_scd_ssn(tx_resp);
2814 struct il_ht_agg *agg;
2815
2816 if (WARN_ON(!qc))
2817 goto out;
2818
2819 agg = &il->stations[sta_id].tid[tid].agg;
2820
2821 il4965_tx_status_reply_tx(il, agg, tx_resp, txq_id, idx);
2822
2823 /* check if BAR is needed */
2824 if (tx_resp->frame_count == 1 &&
2825 !il4965_is_tx_success(status))
2826 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
2827
2828 if (txq->q.read_ptr != (scd_ssn & 0xff)) {
2829 idx = il_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
2830 D_TX_REPLY("Retry scheduler reclaim scd_ssn "
2831 "%d idx %d\n", scd_ssn, idx);
2832 freed = il4965_tx_queue_reclaim(il, txq_id, idx);
2833 il4965_free_tfds_in_queue(il, sta_id, tid, freed);
2834
2835 if (il->mac80211_registered &&
2836 il_queue_space(&txq->q) > txq->q.low_mark &&
2837 agg->state != IL_EMPTYING_HW_QUEUE_DELBA)
2838 il_wake_queue(il, txq);
2839 }
2840 } else {
2841 info->status.rates[0].count = tx_resp->failure_frame + 1;
2842 info->flags |= il4965_tx_status_to_mac80211(status);
2843 il4965_hwrate_to_tx_control(il,
2844 le32_to_cpu(tx_resp->rate_n_flags),
2845 info);
2846
2847 D_TX_REPLY("TXQ %d status %s (0x%08x) "
2848 "rate_n_flags 0x%x retries %d\n", txq_id,
2849 il4965_get_tx_fail_reason(status), status,
2850 le32_to_cpu(tx_resp->rate_n_flags),
2851 tx_resp->failure_frame);
2852
2853 freed = il4965_tx_queue_reclaim(il, txq_id, idx);
2854 if (qc && likely(sta_id != IL_INVALID_STATION))
2855 il4965_free_tfds_in_queue(il, sta_id, tid, freed);
2856 else if (sta_id == IL_INVALID_STATION)
2857 D_TX_REPLY("Station not known\n");
2858
2859 if (il->mac80211_registered &&
2860 il_queue_space(&txq->q) > txq->q.low_mark)
2861 il_wake_queue(il, txq);
2862 }
2863out:
2864 if (qc && likely(sta_id != IL_INVALID_STATION))
2865 il4965_txq_check_empty(il, sta_id, tid, txq_id);
2866
2867 il4965_check_abort_status(il, tx_resp->frame_count, status);
2868
2869 spin_unlock_irqrestore(&il->sta_lock, flags);
2870}
2871
2872/*
2873 * translate ucode response to mac80211 tx status control values
2874 */
2875void
2876il4965_hwrate_to_tx_control(struct il_priv *il, u32 rate_n_flags,
2877 struct ieee80211_tx_info *info)
2878{
2879 struct ieee80211_tx_rate *r = &info->status.rates[0];
2880
2881 info->status.antenna =
2882 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
2883 if (rate_n_flags & RATE_MCS_HT_MSK)
2884 r->flags |= IEEE80211_TX_RC_MCS;
2885 if (rate_n_flags & RATE_MCS_GF_MSK)
2886 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
2887 if (rate_n_flags & RATE_MCS_HT40_MSK)
2888 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
2889 if (rate_n_flags & RATE_MCS_DUP_MSK)
2890 r->flags |= IEEE80211_TX_RC_DUP_DATA;
2891 if (rate_n_flags & RATE_MCS_SGI_MSK)
2892 r->flags |= IEEE80211_TX_RC_SHORT_GI;
2893 r->idx = il4965_hwrate_to_mac80211_idx(rate_n_flags, info->band);
2894}
2895
2896/*
2897 * il4965_hdl_compressed_ba - Handler for N_COMPRESSED_BA
2898 *
2899 * Handles block-acknowledge notification from device, which reports success
2900 * of frames sent via aggregation.
2901 */
2902static void
2903il4965_hdl_compressed_ba(struct il_priv *il, struct il_rx_buf *rxb)
2904{
2905 struct il_rx_pkt *pkt = rxb_addr(rxb);
2906 struct il_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba;
2907 struct il_tx_queue *txq = NULL;
2908 struct il_ht_agg *agg;
2909 int idx;
2910 int sta_id;
2911 int tid;
2912 unsigned long flags;
2913
2914 /* "flow" corresponds to Tx queue */
2915 u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
2916
2917 /* "ssn" is start of block-ack Tx win, corresponds to idx
2918 * (in Tx queue's circular buffer) of first TFD/frame in win */
2919 u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
2920
2921 if (scd_flow >= il->hw_params.max_txq_num) {
2922 IL_ERR("BUG_ON scd_flow is bigger than number of queues\n");
2923 return;
2924 }
2925
2926 txq = &il->txq[scd_flow];
2927 sta_id = ba_resp->sta_id;
2928 tid = ba_resp->tid;
2929 agg = &il->stations[sta_id].tid[tid].agg;
2930 if (unlikely(agg->txq_id != scd_flow)) {
2931 /*
2932 * FIXME: this is a uCode bug which need to be addressed,
2933 * log the information and return for now!
2934 * since it is possible happen very often and in order
2935 * not to fill the syslog, don't enable the logging by default
2936 */
2937 D_TX_REPLY("BA scd_flow %d does not match txq_id %d\n",
2938 scd_flow, agg->txq_id);
2939 return;
2940 }
2941
2942 /* Find idx just before block-ack win */
2943 idx = il_queue_dec_wrap(ba_resp_scd_ssn & 0xff, txq->q.n_bd);
2944
2945 spin_lock_irqsave(&il->sta_lock, flags);
2946
2947 D_TX_REPLY("N_COMPRESSED_BA [%d] Received from %pM, " "sta_id = %d\n",
2948 agg->wait_for_ba, (u8 *) &ba_resp->sta_addr_lo32,
2949 ba_resp->sta_id);
2950 D_TX_REPLY("TID = %d, SeqCtl = %d, bitmap = 0x%llx," "scd_flow = "
2951 "%d, scd_ssn = %d\n", ba_resp->tid, ba_resp->seq_ctl,
2952 (unsigned long long)le64_to_cpu(ba_resp->bitmap),
2953 ba_resp->scd_flow, ba_resp->scd_ssn);
2954 D_TX_REPLY("DAT start_idx = %d, bitmap = 0x%llx\n", agg->start_idx,
2955 (unsigned long long)agg->bitmap);
2956
2957 /* Update driver's record of ACK vs. not for each frame in win */
2958 il4965_tx_status_reply_compressed_ba(il, agg, ba_resp);
2959
2960 /* Release all TFDs before the SSN, i.e. all TFDs in front of
2961 * block-ack win (we assume that they've been successfully
2962 * transmitted ... if not, it's too late anyway). */
2963 if (txq->q.read_ptr != (ba_resp_scd_ssn & 0xff)) {
2964 /* calculate mac80211 ampdu sw queue to wake */
2965 int freed = il4965_tx_queue_reclaim(il, scd_flow, idx);
2966 il4965_free_tfds_in_queue(il, sta_id, tid, freed);
2967
2968 if (il_queue_space(&txq->q) > txq->q.low_mark &&
2969 il->mac80211_registered &&
2970 agg->state != IL_EMPTYING_HW_QUEUE_DELBA)
2971 il_wake_queue(il, txq);
2972
2973 il4965_txq_check_empty(il, sta_id, tid, scd_flow);
2974 }
2975
2976 spin_unlock_irqrestore(&il->sta_lock, flags);
2977}
2978
2979#ifdef CONFIG_IWLEGACY_DEBUG
2980const char *
2981il4965_get_tx_fail_reason(u32 status)
2982{
2983#define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
2984#define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
2985
2986 switch (status & TX_STATUS_MSK) {
2987 case TX_STATUS_SUCCESS:
2988 return "SUCCESS";
2989 TX_STATUS_POSTPONE(DELAY);
2990 TX_STATUS_POSTPONE(FEW_BYTES);
2991 TX_STATUS_POSTPONE(QUIET_PERIOD);
2992 TX_STATUS_POSTPONE(CALC_TTAK);
2993 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
2994 TX_STATUS_FAIL(SHORT_LIMIT);
2995 TX_STATUS_FAIL(LONG_LIMIT);
2996 TX_STATUS_FAIL(FIFO_UNDERRUN);
2997 TX_STATUS_FAIL(DRAIN_FLOW);
2998 TX_STATUS_FAIL(RFKILL_FLUSH);
2999 TX_STATUS_FAIL(LIFE_EXPIRE);
3000 TX_STATUS_FAIL(DEST_PS);
3001 TX_STATUS_FAIL(HOST_ABORTED);
3002 TX_STATUS_FAIL(BT_RETRY);
3003 TX_STATUS_FAIL(STA_INVALID);
3004 TX_STATUS_FAIL(FRAG_DROPPED);
3005 TX_STATUS_FAIL(TID_DISABLE);
3006 TX_STATUS_FAIL(FIFO_FLUSHED);
3007 TX_STATUS_FAIL(INSUFFICIENT_CF_POLL);
3008 TX_STATUS_FAIL(PASSIVE_NO_RX);
3009 TX_STATUS_FAIL(NO_BEACON_ON_RADAR);
3010 }
3011
3012 return "UNKNOWN";
3013
3014#undef TX_STATUS_FAIL
3015#undef TX_STATUS_POSTPONE
3016}
3017#endif /* CONFIG_IWLEGACY_DEBUG */
3018
3019static struct il_link_quality_cmd *
3020il4965_sta_alloc_lq(struct il_priv *il, u8 sta_id)
3021{
3022 int i, r;
3023 struct il_link_quality_cmd *link_cmd;
3024 u32 rate_flags = 0;
3025 __le32 rate_n_flags;
3026
3027 link_cmd = kzalloc(sizeof(struct il_link_quality_cmd), GFP_KERNEL);
3028 if (!link_cmd) {
3029 IL_ERR("Unable to allocate memory for LQ cmd.\n");
3030 return NULL;
3031 }
3032 /* Set up the rate scaling to start at selected rate, fall back
3033 * all the way down to 1M in IEEE order, and then spin on 1M */
3034 if (il->band == NL80211_BAND_5GHZ)
3035 r = RATE_6M_IDX;
3036 else
3037 r = RATE_1M_IDX;
3038
3039 if (r >= IL_FIRST_CCK_RATE && r <= IL_LAST_CCK_RATE)
3040 rate_flags |= RATE_MCS_CCK_MSK;
3041
3042 rate_flags |=
3043 il4965_first_antenna(il->hw_params.
3044 valid_tx_ant) << RATE_MCS_ANT_POS;
3045 rate_n_flags = cpu_to_le32(il_rates[r].plcp | rate_flags);
3046 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
3047 link_cmd->rs_table[i].rate_n_flags = rate_n_flags;
3048
3049 link_cmd->general_params.single_stream_ant_msk =
3050 il4965_first_antenna(il->hw_params.valid_tx_ant);
3051
3052 link_cmd->general_params.dual_stream_ant_msk =
3053 il->hw_params.valid_tx_ant & ~il4965_first_antenna(il->hw_params.
3054 valid_tx_ant);
3055 if (!link_cmd->general_params.dual_stream_ant_msk) {
3056 link_cmd->general_params.dual_stream_ant_msk = ANT_AB;
3057 } else if (il4965_num_of_ant(il->hw_params.valid_tx_ant) == 2) {
3058 link_cmd->general_params.dual_stream_ant_msk =
3059 il->hw_params.valid_tx_ant;
3060 }
3061
3062 link_cmd->agg_params.agg_dis_start_th = LINK_QUAL_AGG_DISABLE_START_DEF;
3063 link_cmd->agg_params.agg_time_limit =
3064 cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF);
3065
3066 link_cmd->sta_id = sta_id;
3067
3068 return link_cmd;
3069}
3070
3071/*
3072 * il4965_add_bssid_station - Add the special IBSS BSSID station
3073 *
3074 * Function sleeps.
3075 */
3076int
3077il4965_add_bssid_station(struct il_priv *il, const u8 *addr, u8 *sta_id_r)
3078{
3079 int ret;
3080 u8 sta_id;
3081 struct il_link_quality_cmd *link_cmd;
3082 unsigned long flags;
3083
3084 if (sta_id_r)
3085 *sta_id_r = IL_INVALID_STATION;
3086
3087 ret = il_add_station_common(il, addr, 0, NULL, &sta_id);
3088 if (ret) {
3089 IL_ERR("Unable to add station %pM\n", addr);
3090 return ret;
3091 }
3092
3093 if (sta_id_r)
3094 *sta_id_r = sta_id;
3095
3096 spin_lock_irqsave(&il->sta_lock, flags);
3097 il->stations[sta_id].used |= IL_STA_LOCAL;
3098 spin_unlock_irqrestore(&il->sta_lock, flags);
3099
3100 /* Set up default rate scaling table in device's station table */
3101 link_cmd = il4965_sta_alloc_lq(il, sta_id);
3102 if (!link_cmd) {
3103 IL_ERR("Unable to initialize rate scaling for station %pM.\n",
3104 addr);
3105 return -ENOMEM;
3106 }
3107
3108 ret = il_send_lq_cmd(il, link_cmd, CMD_SYNC, true);
3109 if (ret)
3110 IL_ERR("Link quality command failed (%d)\n", ret);
3111
3112 spin_lock_irqsave(&il->sta_lock, flags);
3113 il->stations[sta_id].lq = link_cmd;
3114 spin_unlock_irqrestore(&il->sta_lock, flags);
3115
3116 return 0;
3117}
3118
3119static int
3120il4965_static_wepkey_cmd(struct il_priv *il, bool send_if_empty)
3121{
3122 int i;
3123 u8 buff[sizeof(struct il_wep_cmd) +
3124 sizeof(struct il_wep_key) * WEP_KEYS_MAX];
3125 struct il_wep_cmd *wep_cmd = (struct il_wep_cmd *)buff;
3126 size_t cmd_size = sizeof(struct il_wep_cmd);
3127 struct il_host_cmd cmd = {
3128 .id = C_WEPKEY,
3129 .data = wep_cmd,
3130 .flags = CMD_SYNC,
3131 };
3132 bool not_empty = false;
3133
3134 might_sleep();
3135
3136 memset(wep_cmd, 0,
3137 cmd_size + (sizeof(struct il_wep_key) * WEP_KEYS_MAX));
3138
3139 for (i = 0; i < WEP_KEYS_MAX; i++) {
3140 u8 key_size = il->_4965.wep_keys[i].key_size;
3141
3142 wep_cmd->key[i].key_idx = i;
3143 if (key_size) {
3144 wep_cmd->key[i].key_offset = i;
3145 not_empty = true;
3146 } else
3147 wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
3148
3149 wep_cmd->key[i].key_size = key_size;
3150 memcpy(&wep_cmd->key[i].key[3], il->_4965.wep_keys[i].key, key_size);
3151 }
3152
3153 wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
3154 wep_cmd->num_keys = WEP_KEYS_MAX;
3155
3156 cmd_size += sizeof(struct il_wep_key) * WEP_KEYS_MAX;
3157 cmd.len = cmd_size;
3158
3159 if (not_empty || send_if_empty)
3160 return il_send_cmd(il, &cmd);
3161 else
3162 return 0;
3163}
3164
3165int
3166il4965_restore_default_wep_keys(struct il_priv *il)
3167{
3168 lockdep_assert_held(&il->mutex);
3169
3170 return il4965_static_wepkey_cmd(il, false);
3171}
3172
3173int
3174il4965_remove_default_wep_key(struct il_priv *il,
3175 struct ieee80211_key_conf *keyconf)
3176{
3177 int ret;
3178 int idx = keyconf->keyidx;
3179
3180 lockdep_assert_held(&il->mutex);
3181
3182 D_WEP("Removing default WEP key: idx=%d\n", idx);
3183
3184 memset(&il->_4965.wep_keys[idx], 0, sizeof(struct il_wep_key));
3185 if (il_is_rfkill(il)) {
3186 D_WEP("Not sending C_WEPKEY command due to RFKILL.\n");
3187 /* but keys in device are clear anyway so return success */
3188 return 0;
3189 }
3190 ret = il4965_static_wepkey_cmd(il, 1);
3191 D_WEP("Remove default WEP key: idx=%d ret=%d\n", idx, ret);
3192
3193 return ret;
3194}
3195
3196int
3197il4965_set_default_wep_key(struct il_priv *il,
3198 struct ieee80211_key_conf *keyconf)
3199{
3200 int ret;
3201 int len = keyconf->keylen;
3202 int idx = keyconf->keyidx;
3203
3204 lockdep_assert_held(&il->mutex);
3205
3206 if (len != WEP_KEY_LEN_128 && len != WEP_KEY_LEN_64) {
3207 D_WEP("Bad WEP key length %d\n", keyconf->keylen);
3208 return -EINVAL;
3209 }
3210
3211 keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
3212 keyconf->hw_key_idx = HW_KEY_DEFAULT;
3213 il->stations[IL_AP_ID].keyinfo.cipher = keyconf->cipher;
3214
3215 il->_4965.wep_keys[idx].key_size = len;
3216 memcpy(&il->_4965.wep_keys[idx].key, &keyconf->key, len);
3217
3218 ret = il4965_static_wepkey_cmd(il, false);
3219
3220 D_WEP("Set default WEP key: len=%d idx=%d ret=%d\n", len, idx, ret);
3221 return ret;
3222}
3223
3224static int
3225il4965_set_wep_dynamic_key_info(struct il_priv *il,
3226 struct ieee80211_key_conf *keyconf, u8 sta_id)
3227{
3228 unsigned long flags;
3229 __le16 key_flags = 0;
3230 struct il_addsta_cmd sta_cmd;
3231
3232 lockdep_assert_held(&il->mutex);
3233
3234 keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
3235
3236 key_flags |= (STA_KEY_FLG_WEP | STA_KEY_FLG_MAP_KEY_MSK);
3237 key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
3238 key_flags &= ~STA_KEY_FLG_INVALID;
3239
3240 if (keyconf->keylen == WEP_KEY_LEN_128)
3241 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
3242
3243 if (sta_id == il->hw_params.bcast_id)
3244 key_flags |= STA_KEY_MULTICAST_MSK;
3245
3246 spin_lock_irqsave(&il->sta_lock, flags);
3247
3248 il->stations[sta_id].keyinfo.cipher = keyconf->cipher;
3249 il->stations[sta_id].keyinfo.keylen = keyconf->keylen;
3250 il->stations[sta_id].keyinfo.keyidx = keyconf->keyidx;
3251
3252 memcpy(il->stations[sta_id].keyinfo.key, keyconf->key, keyconf->keylen);
3253
3254 memcpy(&il->stations[sta_id].sta.key.key[3], keyconf->key,
3255 keyconf->keylen);
3256
3257 if ((il->stations[sta_id].sta.key.
3258 key_flags & STA_KEY_FLG_ENCRYPT_MSK) == STA_KEY_FLG_NO_ENC)
3259 il->stations[sta_id].sta.key.key_offset =
3260 il_get_free_ucode_key_idx(il);
3261 /* else, we are overriding an existing key => no need to allocated room
3262 * in uCode. */
3263
3264 WARN(il->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
3265 "no space for a new key");
3266
3267 il->stations[sta_id].sta.key.key_flags = key_flags;
3268 il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
3269 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3270
3271 memcpy(&sta_cmd, &il->stations[sta_id].sta,
3272 sizeof(struct il_addsta_cmd));
3273 spin_unlock_irqrestore(&il->sta_lock, flags);
3274
3275 return il_send_add_sta(il, &sta_cmd, CMD_SYNC);
3276}
3277
3278static int
3279il4965_set_ccmp_dynamic_key_info(struct il_priv *il,
3280 struct ieee80211_key_conf *keyconf, u8 sta_id)
3281{
3282 unsigned long flags;
3283 __le16 key_flags = 0;
3284 struct il_addsta_cmd sta_cmd;
3285
3286 lockdep_assert_held(&il->mutex);
3287
3288 key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
3289 key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
3290 key_flags &= ~STA_KEY_FLG_INVALID;
3291
3292 if (sta_id == il->hw_params.bcast_id)
3293 key_flags |= STA_KEY_MULTICAST_MSK;
3294
3295 keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
3296
3297 spin_lock_irqsave(&il->sta_lock, flags);
3298 il->stations[sta_id].keyinfo.cipher = keyconf->cipher;
3299 il->stations[sta_id].keyinfo.keylen = keyconf->keylen;
3300
3301 memcpy(il->stations[sta_id].keyinfo.key, keyconf->key, keyconf->keylen);
3302
3303 memcpy(il->stations[sta_id].sta.key.key, keyconf->key, keyconf->keylen);
3304
3305 if ((il->stations[sta_id].sta.key.
3306 key_flags & STA_KEY_FLG_ENCRYPT_MSK) == STA_KEY_FLG_NO_ENC)
3307 il->stations[sta_id].sta.key.key_offset =
3308 il_get_free_ucode_key_idx(il);
3309 /* else, we are overriding an existing key => no need to allocated room
3310 * in uCode. */
3311
3312 WARN(il->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
3313 "no space for a new key");
3314
3315 il->stations[sta_id].sta.key.key_flags = key_flags;
3316 il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
3317 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3318
3319 memcpy(&sta_cmd, &il->stations[sta_id].sta,
3320 sizeof(struct il_addsta_cmd));
3321 spin_unlock_irqrestore(&il->sta_lock, flags);
3322
3323 return il_send_add_sta(il, &sta_cmd, CMD_SYNC);
3324}
3325
3326static int
3327il4965_set_tkip_dynamic_key_info(struct il_priv *il,
3328 struct ieee80211_key_conf *keyconf, u8 sta_id)
3329{
3330 unsigned long flags;
3331 __le16 key_flags = 0;
3332
3333 key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
3334 key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
3335 key_flags &= ~STA_KEY_FLG_INVALID;
3336
3337 if (sta_id == il->hw_params.bcast_id)
3338 key_flags |= STA_KEY_MULTICAST_MSK;
3339
3340 keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
3341 keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
3342
3343 spin_lock_irqsave(&il->sta_lock, flags);
3344
3345 il->stations[sta_id].keyinfo.cipher = keyconf->cipher;
3346 il->stations[sta_id].keyinfo.keylen = 16;
3347
3348 if ((il->stations[sta_id].sta.key.
3349 key_flags & STA_KEY_FLG_ENCRYPT_MSK) == STA_KEY_FLG_NO_ENC)
3350 il->stations[sta_id].sta.key.key_offset =
3351 il_get_free_ucode_key_idx(il);
3352 /* else, we are overriding an existing key => no need to allocated room
3353 * in uCode. */
3354
3355 WARN(il->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
3356 "no space for a new key");
3357
3358 il->stations[sta_id].sta.key.key_flags = key_flags;
3359
3360 /* This copy is acutally not needed: we get the key with each TX */
3361 memcpy(il->stations[sta_id].keyinfo.key, keyconf->key, 16);
3362
3363 memcpy(il->stations[sta_id].sta.key.key, keyconf->key, 16);
3364
3365 spin_unlock_irqrestore(&il->sta_lock, flags);
3366
3367 return 0;
3368}
3369
3370void
3371il4965_update_tkip_key(struct il_priv *il, struct ieee80211_key_conf *keyconf,
3372 struct ieee80211_sta *sta, u32 iv32, u16 *phase1key)
3373{
3374 u8 sta_id;
3375 unsigned long flags;
3376 int i;
3377
3378 if (il_scan_cancel(il)) {
3379 /* cancel scan failed, just live w/ bad key and rely
3380 briefly on SW decryption */
3381 return;
3382 }
3383
3384 sta_id = il_sta_id_or_broadcast(il, sta);
3385 if (sta_id == IL_INVALID_STATION)
3386 return;
3387
3388 spin_lock_irqsave(&il->sta_lock, flags);
3389
3390 il->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
3391
3392 for (i = 0; i < 5; i++)
3393 il->stations[sta_id].sta.key.tkip_rx_ttak[i] =
3394 cpu_to_le16(phase1key[i]);
3395
3396 il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
3397 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3398
3399 il_send_add_sta(il, &il->stations[sta_id].sta, CMD_ASYNC);
3400
3401 spin_unlock_irqrestore(&il->sta_lock, flags);
3402}
3403
3404int
3405il4965_remove_dynamic_key(struct il_priv *il,
3406 struct ieee80211_key_conf *keyconf, u8 sta_id)
3407{
3408 unsigned long flags;
3409 u16 key_flags;
3410 u8 keyidx;
3411 struct il_addsta_cmd sta_cmd;
3412
3413 lockdep_assert_held(&il->mutex);
3414
3415 il->_4965.key_mapping_keys--;
3416
3417 spin_lock_irqsave(&il->sta_lock, flags);
3418 key_flags = le16_to_cpu(il->stations[sta_id].sta.key.key_flags);
3419 keyidx = (key_flags >> STA_KEY_FLG_KEYID_POS) & 0x3;
3420
3421 D_WEP("Remove dynamic key: idx=%d sta=%d\n", keyconf->keyidx, sta_id);
3422
3423 if (keyconf->keyidx != keyidx) {
3424 /* We need to remove a key with idx different that the one
3425 * in the uCode. This means that the key we need to remove has
3426 * been replaced by another one with different idx.
3427 * Don't do anything and return ok
3428 */
3429 spin_unlock_irqrestore(&il->sta_lock, flags);
3430 return 0;
3431 }
3432
3433 if (il->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_INVALID) {
3434 IL_WARN("Removing wrong key %d 0x%x\n", keyconf->keyidx,
3435 key_flags);
3436 spin_unlock_irqrestore(&il->sta_lock, flags);
3437 return 0;
3438 }
3439
3440 if (!test_and_clear_bit
3441 (il->stations[sta_id].sta.key.key_offset, &il->ucode_key_table))
3442 IL_ERR("idx %d not used in uCode key table.\n",
3443 il->stations[sta_id].sta.key.key_offset);
3444 memset(&il->stations[sta_id].keyinfo, 0, sizeof(struct il_hw_key));
3445 memset(&il->stations[sta_id].sta.key, 0, sizeof(struct il4965_keyinfo));
3446 il->stations[sta_id].sta.key.key_flags =
3447 STA_KEY_FLG_NO_ENC | STA_KEY_FLG_INVALID;
3448 il->stations[sta_id].sta.key.key_offset = keyconf->hw_key_idx;
3449 il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
3450 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3451
3452 if (il_is_rfkill(il)) {
3453 D_WEP
3454 ("Not sending C_ADD_STA command because RFKILL enabled.\n");
3455 spin_unlock_irqrestore(&il->sta_lock, flags);
3456 return 0;
3457 }
3458 memcpy(&sta_cmd, &il->stations[sta_id].sta,
3459 sizeof(struct il_addsta_cmd));
3460 spin_unlock_irqrestore(&il->sta_lock, flags);
3461
3462 return il_send_add_sta(il, &sta_cmd, CMD_SYNC);
3463}
3464
3465int
3466il4965_set_dynamic_key(struct il_priv *il, struct ieee80211_key_conf *keyconf,
3467 u8 sta_id)
3468{
3469 int ret;
3470
3471 lockdep_assert_held(&il->mutex);
3472
3473 il->_4965.key_mapping_keys++;
3474 keyconf->hw_key_idx = HW_KEY_DYNAMIC;
3475
3476 switch (keyconf->cipher) {
3477 case WLAN_CIPHER_SUITE_CCMP:
3478 ret =
3479 il4965_set_ccmp_dynamic_key_info(il, keyconf, sta_id);
3480 break;
3481 case WLAN_CIPHER_SUITE_TKIP:
3482 ret =
3483 il4965_set_tkip_dynamic_key_info(il, keyconf, sta_id);
3484 break;
3485 case WLAN_CIPHER_SUITE_WEP40:
3486 case WLAN_CIPHER_SUITE_WEP104:
3487 ret = il4965_set_wep_dynamic_key_info(il, keyconf, sta_id);
3488 break;
3489 default:
3490 IL_ERR("Unknown alg: %s cipher = %x\n", __func__,
3491 keyconf->cipher);
3492 ret = -EINVAL;
3493 }
3494
3495 D_WEP("Set dynamic key: cipher=%x len=%d idx=%d sta=%d ret=%d\n",
3496 keyconf->cipher, keyconf->keylen, keyconf->keyidx, sta_id, ret);
3497
3498 return ret;
3499}
3500
3501/*
3502 * il4965_alloc_bcast_station - add broadcast station into driver's station table.
3503 *
3504 * This adds the broadcast station into the driver's station table
3505 * and marks it driver active, so that it will be restored to the
3506 * device at the next best time.
3507 */
3508int
3509il4965_alloc_bcast_station(struct il_priv *il)
3510{
3511 struct il_link_quality_cmd *link_cmd;
3512 unsigned long flags;
3513 u8 sta_id;
3514
3515 spin_lock_irqsave(&il->sta_lock, flags);
3516 sta_id = il_prep_station(il, il_bcast_addr, false, NULL);
3517 if (sta_id == IL_INVALID_STATION) {
3518 IL_ERR("Unable to prepare broadcast station\n");
3519 spin_unlock_irqrestore(&il->sta_lock, flags);
3520
3521 return -EINVAL;
3522 }
3523
3524 il->stations[sta_id].used |= IL_STA_DRIVER_ACTIVE;
3525 il->stations[sta_id].used |= IL_STA_BCAST;
3526 spin_unlock_irqrestore(&il->sta_lock, flags);
3527
3528 link_cmd = il4965_sta_alloc_lq(il, sta_id);
3529 if (!link_cmd) {
3530 IL_ERR
3531 ("Unable to initialize rate scaling for bcast station.\n");
3532 return -ENOMEM;
3533 }
3534
3535 spin_lock_irqsave(&il->sta_lock, flags);
3536 il->stations[sta_id].lq = link_cmd;
3537 spin_unlock_irqrestore(&il->sta_lock, flags);
3538
3539 return 0;
3540}
3541
3542/*
3543 * il4965_update_bcast_station - update broadcast station's LQ command
3544 *
3545 * Only used by iwl4965. Placed here to have all bcast station management
3546 * code together.
3547 */
3548static int
3549il4965_update_bcast_station(struct il_priv *il)
3550{
3551 unsigned long flags;
3552 struct il_link_quality_cmd *link_cmd;
3553 u8 sta_id = il->hw_params.bcast_id;
3554
3555 link_cmd = il4965_sta_alloc_lq(il, sta_id);
3556 if (!link_cmd) {
3557 IL_ERR("Unable to initialize rate scaling for bcast sta.\n");
3558 return -ENOMEM;
3559 }
3560
3561 spin_lock_irqsave(&il->sta_lock, flags);
3562 if (il->stations[sta_id].lq)
3563 kfree(il->stations[sta_id].lq);
3564 else
3565 D_INFO("Bcast sta rate scaling has not been initialized.\n");
3566 il->stations[sta_id].lq = link_cmd;
3567 spin_unlock_irqrestore(&il->sta_lock, flags);
3568
3569 return 0;
3570}
3571
3572int
3573il4965_update_bcast_stations(struct il_priv *il)
3574{
3575 return il4965_update_bcast_station(il);
3576}
3577
3578/*
3579 * il4965_sta_tx_modify_enable_tid - Enable Tx for this TID in station table
3580 */
3581int
3582il4965_sta_tx_modify_enable_tid(struct il_priv *il, int sta_id, int tid)
3583{
3584 unsigned long flags;
3585 struct il_addsta_cmd sta_cmd;
3586
3587 lockdep_assert_held(&il->mutex);
3588
3589 /* Remove "disable" flag, to enable Tx for this TID */
3590 spin_lock_irqsave(&il->sta_lock, flags);
3591 il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
3592 il->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
3593 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3594 memcpy(&sta_cmd, &il->stations[sta_id].sta,
3595 sizeof(struct il_addsta_cmd));
3596 spin_unlock_irqrestore(&il->sta_lock, flags);
3597
3598 return il_send_add_sta(il, &sta_cmd, CMD_SYNC);
3599}
3600
3601int
3602il4965_sta_rx_agg_start(struct il_priv *il, struct ieee80211_sta *sta, int tid,
3603 u16 ssn)
3604{
3605 unsigned long flags;
3606 int sta_id;
3607 struct il_addsta_cmd sta_cmd;
3608
3609 lockdep_assert_held(&il->mutex);
3610
3611 sta_id = il_sta_id(sta);
3612 if (sta_id == IL_INVALID_STATION)
3613 return -ENXIO;
3614
3615 spin_lock_irqsave(&il->sta_lock, flags);
3616 il->stations[sta_id].sta.station_flags_msk = 0;
3617 il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
3618 il->stations[sta_id].sta.add_immediate_ba_tid = (u8) tid;
3619 il->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
3620 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3621 memcpy(&sta_cmd, &il->stations[sta_id].sta,
3622 sizeof(struct il_addsta_cmd));
3623 spin_unlock_irqrestore(&il->sta_lock, flags);
3624
3625 return il_send_add_sta(il, &sta_cmd, CMD_SYNC);
3626}
3627
3628int
3629il4965_sta_rx_agg_stop(struct il_priv *il, struct ieee80211_sta *sta, int tid)
3630{
3631 unsigned long flags;
3632 int sta_id;
3633 struct il_addsta_cmd sta_cmd;
3634
3635 lockdep_assert_held(&il->mutex);
3636
3637 sta_id = il_sta_id(sta);
3638 if (sta_id == IL_INVALID_STATION) {
3639 IL_ERR("Invalid station for AGG tid %d\n", tid);
3640 return -ENXIO;
3641 }
3642
3643 spin_lock_irqsave(&il->sta_lock, flags);
3644 il->stations[sta_id].sta.station_flags_msk = 0;
3645 il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
3646 il->stations[sta_id].sta.remove_immediate_ba_tid = (u8) tid;
3647 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3648 memcpy(&sta_cmd, &il->stations[sta_id].sta,
3649 sizeof(struct il_addsta_cmd));
3650 spin_unlock_irqrestore(&il->sta_lock, flags);
3651
3652 return il_send_add_sta(il, &sta_cmd, CMD_SYNC);
3653}
3654
3655void
3656il4965_sta_modify_sleep_tx_count(struct il_priv *il, int sta_id, int cnt)
3657{
3658 unsigned long flags;
3659
3660 spin_lock_irqsave(&il->sta_lock, flags);
3661 il->stations[sta_id].sta.station_flags |= STA_FLG_PWR_SAVE_MSK;
3662 il->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
3663 il->stations[sta_id].sta.sta.modify_mask =
3664 STA_MODIFY_SLEEP_TX_COUNT_MSK;
3665 il->stations[sta_id].sta.sleep_tx_count = cpu_to_le16(cnt);
3666 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3667 il_send_add_sta(il, &il->stations[sta_id].sta, CMD_ASYNC);
3668 spin_unlock_irqrestore(&il->sta_lock, flags);
3669
3670}
3671
3672void
3673il4965_update_chain_flags(struct il_priv *il)
3674{
3675 if (il->ops->set_rxon_chain) {
3676 il->ops->set_rxon_chain(il);
3677 if (il->active.rx_chain != il->staging.rx_chain)
3678 il_commit_rxon(il);
3679 }
3680}
3681
3682static void
3683il4965_clear_free_frames(struct il_priv *il)
3684{
3685 struct list_head *element;
3686
3687 D_INFO("%d frames on pre-allocated heap on clear.\n", il->frames_count);
3688
3689 while (!list_empty(&il->free_frames)) {
3690 element = il->free_frames.next;
3691 list_del(element);
3692 kfree(list_entry(element, struct il_frame, list));
3693 il->frames_count--;
3694 }
3695
3696 if (il->frames_count) {
3697 IL_WARN("%d frames still in use. Did we lose one?\n",
3698 il->frames_count);
3699 il->frames_count = 0;
3700 }
3701}
3702
3703static struct il_frame *
3704il4965_get_free_frame(struct il_priv *il)
3705{
3706 struct il_frame *frame;
3707 struct list_head *element;
3708 if (list_empty(&il->free_frames)) {
3709 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
3710 if (!frame) {
3711 IL_ERR("Could not allocate frame!\n");
3712 return NULL;
3713 }
3714
3715 il->frames_count++;
3716 return frame;
3717 }
3718
3719 element = il->free_frames.next;
3720 list_del(element);
3721 return list_entry(element, struct il_frame, list);
3722}
3723
3724static void
3725il4965_free_frame(struct il_priv *il, struct il_frame *frame)
3726{
3727 memset(frame, 0, sizeof(*frame));
3728 list_add(&frame->list, &il->free_frames);
3729}
3730
3731static u32
3732il4965_fill_beacon_frame(struct il_priv *il, struct ieee80211_hdr *hdr,
3733 int left)
3734{
3735 lockdep_assert_held(&il->mutex);
3736
3737 if (!il->beacon_skb)
3738 return 0;
3739
3740 if (il->beacon_skb->len > left)
3741 return 0;
3742
3743 memcpy(hdr, il->beacon_skb->data, il->beacon_skb->len);
3744
3745 return il->beacon_skb->len;
3746}
3747
3748/* Parse the beacon frame to find the TIM element and set tim_idx & tim_size */
3749static void
3750il4965_set_beacon_tim(struct il_priv *il,
3751 struct il_tx_beacon_cmd *tx_beacon_cmd, u8 * beacon,
3752 u32 frame_size)
3753{
3754 u16 tim_idx;
3755 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon;
3756
3757 /*
3758 * The idx is relative to frame start but we start looking at the
3759 * variable-length part of the beacon.
3760 */
3761 tim_idx = mgmt->u.beacon.variable - beacon;
3762
3763 /* Parse variable-length elements of beacon to find WLAN_EID_TIM */
3764 while ((tim_idx < (frame_size - 2)) &&
3765 (beacon[tim_idx] != WLAN_EID_TIM))
3766 tim_idx += beacon[tim_idx + 1] + 2;
3767
3768 /* If TIM field was found, set variables */
3769 if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) {
3770 tx_beacon_cmd->tim_idx = cpu_to_le16(tim_idx);
3771 tx_beacon_cmd->tim_size = beacon[tim_idx + 1];
3772 } else
3773 IL_WARN("Unable to find TIM Element in beacon\n");
3774}
3775
3776static unsigned int
3777il4965_hw_get_beacon_cmd(struct il_priv *il, struct il_frame *frame)
3778{
3779 struct il_tx_beacon_cmd *tx_beacon_cmd;
3780 u32 frame_size;
3781 u32 rate_flags;
3782 u32 rate;
3783 /*
3784 * We have to set up the TX command, the TX Beacon command, and the
3785 * beacon contents.
3786 */
3787
3788 lockdep_assert_held(&il->mutex);
3789
3790 if (!il->beacon_enabled) {
3791 IL_ERR("Trying to build beacon without beaconing enabled\n");
3792 return 0;
3793 }
3794
3795 /* Initialize memory */
3796 tx_beacon_cmd = &frame->u.beacon;
3797 memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
3798
3799 /* Set up TX beacon contents */
3800 frame_size =
3801 il4965_fill_beacon_frame(il, tx_beacon_cmd->frame,
3802 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
3803 if (WARN_ON_ONCE(frame_size > MAX_MPDU_SIZE))
3804 return 0;
3805 if (!frame_size)
3806 return 0;
3807
3808 /* Set up TX command fields */
3809 tx_beacon_cmd->tx.len = cpu_to_le16((u16) frame_size);
3810 tx_beacon_cmd->tx.sta_id = il->hw_params.bcast_id;
3811 tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
3812 tx_beacon_cmd->tx.tx_flags =
3813 TX_CMD_FLG_SEQ_CTL_MSK | TX_CMD_FLG_TSF_MSK |
3814 TX_CMD_FLG_STA_RATE_MSK;
3815
3816 /* Set up TX beacon command fields */
3817 il4965_set_beacon_tim(il, tx_beacon_cmd, (u8 *) tx_beacon_cmd->frame,
3818 frame_size);
3819
3820 /* Set up packet rate and flags */
3821 rate = il_get_lowest_plcp(il);
3822 il4965_toggle_tx_ant(il, &il->mgmt_tx_ant, il->hw_params.valid_tx_ant);
3823 rate_flags = BIT(il->mgmt_tx_ant) << RATE_MCS_ANT_POS;
3824 if ((rate >= IL_FIRST_CCK_RATE) && (rate <= IL_LAST_CCK_RATE))
3825 rate_flags |= RATE_MCS_CCK_MSK;
3826 tx_beacon_cmd->tx.rate_n_flags = cpu_to_le32(rate | rate_flags);
3827
3828 return sizeof(*tx_beacon_cmd) + frame_size;
3829}
3830
3831int
3832il4965_send_beacon_cmd(struct il_priv *il)
3833{
3834 struct il_frame *frame;
3835 unsigned int frame_size;
3836 int rc;
3837
3838 frame = il4965_get_free_frame(il);
3839 if (!frame) {
3840 IL_ERR("Could not obtain free frame buffer for beacon "
3841 "command.\n");
3842 return -ENOMEM;
3843 }
3844
3845 frame_size = il4965_hw_get_beacon_cmd(il, frame);
3846 if (!frame_size) {
3847 IL_ERR("Error configuring the beacon command\n");
3848 il4965_free_frame(il, frame);
3849 return -EINVAL;
3850 }
3851
3852 rc = il_send_cmd_pdu(il, C_TX_BEACON, frame_size, &frame->u.cmd[0]);
3853
3854 il4965_free_frame(il, frame);
3855
3856 return rc;
3857}
3858
3859static inline dma_addr_t
3860il4965_tfd_tb_get_addr(struct il_tfd *tfd, u8 idx)
3861{
3862 struct il_tfd_tb *tb = &tfd->tbs[idx];
3863
3864 dma_addr_t addr = get_unaligned_le32(&tb->lo);
3865 if (sizeof(dma_addr_t) > sizeof(u32))
3866 addr |=
3867 ((dma_addr_t) (le16_to_cpu(tb->hi_n_len) & 0xF) << 16) <<
3868 16;
3869
3870 return addr;
3871}
3872
3873static inline u16
3874il4965_tfd_tb_get_len(struct il_tfd *tfd, u8 idx)
3875{
3876 struct il_tfd_tb *tb = &tfd->tbs[idx];
3877
3878 return le16_to_cpu(tb->hi_n_len) >> 4;
3879}
3880
3881static inline void
3882il4965_tfd_set_tb(struct il_tfd *tfd, u8 idx, dma_addr_t addr, u16 len)
3883{
3884 struct il_tfd_tb *tb = &tfd->tbs[idx];
3885 u16 hi_n_len = len << 4;
3886
3887 put_unaligned_le32(addr, &tb->lo);
3888 if (sizeof(dma_addr_t) > sizeof(u32))
3889 hi_n_len |= ((addr >> 16) >> 16) & 0xF;
3890
3891 tb->hi_n_len = cpu_to_le16(hi_n_len);
3892
3893 tfd->num_tbs = idx + 1;
3894}
3895
3896static inline u8
3897il4965_tfd_get_num_tbs(struct il_tfd *tfd)
3898{
3899 return tfd->num_tbs & 0x1f;
3900}
3901
3902/*
3903 * il4965_hw_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr]
3904 *
3905 * Does NOT advance any TFD circular buffer read/write idxes
3906 * Does NOT free the TFD itself (which is within circular buffer)
3907 */
3908void
3909il4965_hw_txq_free_tfd(struct il_priv *il, struct il_tx_queue *txq)
3910{
3911 struct il_tfd *tfd_tmp = (struct il_tfd *)txq->tfds;
3912 struct il_tfd *tfd;
3913 struct pci_dev *dev = il->pci_dev;
3914 int idx = txq->q.read_ptr;
3915 int i;
3916 int num_tbs;
3917
3918 tfd = &tfd_tmp[idx];
3919
3920 /* Sanity check on number of chunks */
3921 num_tbs = il4965_tfd_get_num_tbs(tfd);
3922
3923 if (num_tbs >= IL_NUM_OF_TBS) {
3924 IL_ERR("Too many chunks: %i\n", num_tbs);
3925 /* @todo issue fatal error, it is quite serious situation */
3926 return;
3927 }
3928
3929 /* Unmap tx_cmd */
3930 if (num_tbs)
3931 dma_unmap_single(&dev->dev,
3932 dma_unmap_addr(&txq->meta[idx], mapping),
3933 dma_unmap_len(&txq->meta[idx], len),
3934 DMA_BIDIRECTIONAL);
3935
3936 /* Unmap chunks, if any. */
3937 for (i = 1; i < num_tbs; i++)
3938 dma_unmap_single(&dev->dev, il4965_tfd_tb_get_addr(tfd, i),
3939 il4965_tfd_tb_get_len(tfd, i), DMA_TO_DEVICE);
3940
3941 /* free SKB */
3942 if (txq->skbs) {
3943 struct sk_buff *skb = txq->skbs[txq->q.read_ptr];
3944
3945 /* can be called from irqs-disabled context */
3946 if (skb) {
3947 dev_kfree_skb_any(skb);
3948 txq->skbs[txq->q.read_ptr] = NULL;
3949 }
3950 }
3951}
3952
3953int
3954il4965_hw_txq_attach_buf_to_tfd(struct il_priv *il, struct il_tx_queue *txq,
3955 dma_addr_t addr, u16 len, u8 reset, u8 pad)
3956{
3957 struct il_queue *q;
3958 struct il_tfd *tfd, *tfd_tmp;
3959 u32 num_tbs;
3960
3961 q = &txq->q;
3962 tfd_tmp = (struct il_tfd *)txq->tfds;
3963 tfd = &tfd_tmp[q->write_ptr];
3964
3965 if (reset)
3966 memset(tfd, 0, sizeof(*tfd));
3967
3968 num_tbs = il4965_tfd_get_num_tbs(tfd);
3969
3970 /* Each TFD can point to a maximum 20 Tx buffers */
3971 if (num_tbs >= IL_NUM_OF_TBS) {
3972 IL_ERR("Error can not send more than %d chunks\n",
3973 IL_NUM_OF_TBS);
3974 return -EINVAL;
3975 }
3976
3977 BUG_ON(addr & ~DMA_BIT_MASK(36));
3978 if (unlikely(addr & ~IL_TX_DMA_MASK))
3979 IL_ERR("Unaligned address = %llx\n", (unsigned long long)addr);
3980
3981 il4965_tfd_set_tb(tfd, num_tbs, addr, len);
3982
3983 return 0;
3984}
3985
3986/*
3987 * Tell nic where to find circular buffer of Tx Frame Descriptors for
3988 * given Tx queue, and enable the DMA channel used for that queue.
3989 *
3990 * 4965 supports up to 16 Tx queues in DRAM, mapped to up to 8 Tx DMA
3991 * channels supported in hardware.
3992 */
3993int
3994il4965_hw_tx_queue_init(struct il_priv *il, struct il_tx_queue *txq)
3995{
3996 int txq_id = txq->q.id;
3997
3998 /* Circular buffer (TFD queue in DRAM) physical base address */
3999 il_wr(il, FH49_MEM_CBBC_QUEUE(txq_id), txq->q.dma_addr >> 8);
4000
4001 return 0;
4002}
4003
4004/******************************************************************************
4005 *
4006 * Generic RX handler implementations
4007 *
4008 ******************************************************************************/
4009static void
4010il4965_hdl_alive(struct il_priv *il, struct il_rx_buf *rxb)
4011{
4012 struct il_rx_pkt *pkt = rxb_addr(rxb);
4013 struct il_alive_resp *palive;
4014 struct delayed_work *pwork;
4015
4016 palive = &pkt->u.alive_frame;
4017
4018 D_INFO("Alive ucode status 0x%08X revision " "0x%01X 0x%01X\n",
4019 palive->is_valid, palive->ver_type, palive->ver_subtype);
4020
4021 if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
4022 D_INFO("Initialization Alive received.\n");
4023 memcpy(&il->card_alive_init, &pkt->u.raw,
4024 sizeof(struct il_init_alive_resp));
4025 pwork = &il->init_alive_start;
4026 } else {
4027 D_INFO("Runtime Alive received.\n");
4028 memcpy(&il->card_alive, &pkt->u.alive_frame,
4029 sizeof(struct il_alive_resp));
4030 pwork = &il->alive_start;
4031 }
4032
4033 /* We delay the ALIVE response by 5ms to
4034 * give the HW RF Kill time to activate... */
4035 if (palive->is_valid == UCODE_VALID_OK)
4036 queue_delayed_work(il->workqueue, pwork, msecs_to_jiffies(5));
4037 else
4038 IL_WARN("uCode did not respond OK.\n");
4039}
4040
4041/*
4042 * il4965_bg_stats_periodic - Timer callback to queue stats
4043 *
4044 * This callback is provided in order to send a stats request.
4045 *
4046 * This timer function is continually reset to execute within
4047 * 60 seconds since the last N_STATS was received. We need to
4048 * ensure we receive the stats in order to update the temperature
4049 * used for calibrating the TXPOWER.
4050 */
4051static void
4052il4965_bg_stats_periodic(struct timer_list *t)
4053{
4054 struct il_priv *il = from_timer(il, t, stats_periodic);
4055
4056 if (test_bit(S_EXIT_PENDING, &il->status))
4057 return;
4058
4059 /* dont send host command if rf-kill is on */
4060 if (!il_is_ready_rf(il))
4061 return;
4062
4063 il_send_stats_request(il, CMD_ASYNC, false);
4064}
4065
4066static void
4067il4965_hdl_beacon(struct il_priv *il, struct il_rx_buf *rxb)
4068{
4069 struct il_rx_pkt *pkt = rxb_addr(rxb);
4070 struct il4965_beacon_notif *beacon =
4071 (struct il4965_beacon_notif *)pkt->u.raw;
4072#ifdef CONFIG_IWLEGACY_DEBUG
4073 u8 rate = il4965_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
4074
4075 D_RX("beacon status %x retries %d iss %d tsf:0x%.8x%.8x rate %d\n",
4076 le32_to_cpu(beacon->beacon_notify_hdr.u.status) & TX_STATUS_MSK,
4077 beacon->beacon_notify_hdr.failure_frame,
4078 le32_to_cpu(beacon->ibss_mgr_status),
4079 le32_to_cpu(beacon->high_tsf), le32_to_cpu(beacon->low_tsf), rate);
4080#endif
4081 il->ibss_manager = le32_to_cpu(beacon->ibss_mgr_status);
4082}
4083
4084static void
4085il4965_perform_ct_kill_task(struct il_priv *il)
4086{
4087 unsigned long flags;
4088
4089 D_POWER("Stop all queues\n");
4090
4091 if (il->mac80211_registered)
4092 ieee80211_stop_queues(il->hw);
4093
4094 _il_wr(il, CSR_UCODE_DRV_GP1_SET,
4095 CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
4096 _il_rd(il, CSR_UCODE_DRV_GP1);
4097
4098 spin_lock_irqsave(&il->reg_lock, flags);
4099 if (likely(_il_grab_nic_access(il)))
4100 _il_release_nic_access(il);
4101 spin_unlock_irqrestore(&il->reg_lock, flags);
4102}
4103
4104/* Handle notification from uCode that card's power state is changing
4105 * due to software, hardware, or critical temperature RFKILL */
4106static void
4107il4965_hdl_card_state(struct il_priv *il, struct il_rx_buf *rxb)
4108{
4109 struct il_rx_pkt *pkt = rxb_addr(rxb);
4110 u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
4111 unsigned long status = il->status;
4112
4113 D_RF_KILL("Card state received: HW:%s SW:%s CT:%s\n",
4114 (flags & HW_CARD_DISABLED) ? "Kill" : "On",
4115 (flags & SW_CARD_DISABLED) ? "Kill" : "On",
4116 (flags & CT_CARD_DISABLED) ? "Reached" : "Not reached");
4117
4118 if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED | CT_CARD_DISABLED)) {
4119
4120 _il_wr(il, CSR_UCODE_DRV_GP1_SET,
4121 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
4122
4123 il_wr(il, HBUS_TARG_MBX_C, HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
4124
4125 if (!(flags & RXON_CARD_DISABLED)) {
4126 _il_wr(il, CSR_UCODE_DRV_GP1_CLR,
4127 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
4128 il_wr(il, HBUS_TARG_MBX_C,
4129 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
4130 }
4131 }
4132
4133 if (flags & CT_CARD_DISABLED)
4134 il4965_perform_ct_kill_task(il);
4135
4136 if (flags & HW_CARD_DISABLED)
4137 set_bit(S_RFKILL, &il->status);
4138 else
4139 clear_bit(S_RFKILL, &il->status);
4140
4141 if (!(flags & RXON_CARD_DISABLED))
4142 il_scan_cancel(il);
4143
4144 if ((test_bit(S_RFKILL, &status) !=
4145 test_bit(S_RFKILL, &il->status)))
4146 wiphy_rfkill_set_hw_state(il->hw->wiphy,
4147 test_bit(S_RFKILL, &il->status));
4148 else
4149 wake_up(&il->wait_command_queue);
4150}
4151
4152/*
4153 * il4965_setup_handlers - Initialize Rx handler callbacks
4154 *
4155 * Setup the RX handlers for each of the reply types sent from the uCode
4156 * to the host.
4157 *
4158 * This function chains into the hardware specific files for them to setup
4159 * any hardware specific handlers as well.
4160 */
4161static void
4162il4965_setup_handlers(struct il_priv *il)
4163{
4164 il->handlers[N_ALIVE] = il4965_hdl_alive;
4165 il->handlers[N_ERROR] = il_hdl_error;
4166 il->handlers[N_CHANNEL_SWITCH] = il_hdl_csa;
4167 il->handlers[N_SPECTRUM_MEASUREMENT] = il_hdl_spectrum_measurement;
4168 il->handlers[N_PM_SLEEP] = il_hdl_pm_sleep;
4169 il->handlers[N_PM_DEBUG_STATS] = il_hdl_pm_debug_stats;
4170 il->handlers[N_BEACON] = il4965_hdl_beacon;
4171
4172 /*
4173 * The same handler is used for both the REPLY to a discrete
4174 * stats request from the host as well as for the periodic
4175 * stats notifications (after received beacons) from the uCode.
4176 */
4177 il->handlers[C_STATS] = il4965_hdl_c_stats;
4178 il->handlers[N_STATS] = il4965_hdl_stats;
4179
4180 il_setup_rx_scan_handlers(il);
4181
4182 /* status change handler */
4183 il->handlers[N_CARD_STATE] = il4965_hdl_card_state;
4184
4185 il->handlers[N_MISSED_BEACONS] = il4965_hdl_missed_beacon;
4186 /* Rx handlers */
4187 il->handlers[N_RX_PHY] = il4965_hdl_rx_phy;
4188 il->handlers[N_RX_MPDU] = il4965_hdl_rx;
4189 il->handlers[N_RX] = il4965_hdl_rx;
4190 /* block ack */
4191 il->handlers[N_COMPRESSED_BA] = il4965_hdl_compressed_ba;
4192 /* Tx response */
4193 il->handlers[C_TX] = il4965_hdl_tx;
4194}
4195
4196/*
4197 * il4965_rx_handle - Main entry function for receiving responses from uCode
4198 *
4199 * Uses the il->handlers callback function array to invoke
4200 * the appropriate handlers, including command responses,
4201 * frame-received notifications, and other notifications.
4202 */
4203void
4204il4965_rx_handle(struct il_priv *il)
4205{
4206 struct il_rx_buf *rxb;
4207 struct il_rx_pkt *pkt;
4208 struct il_rx_queue *rxq = &il->rxq;
4209 u32 r, i;
4210 int reclaim;
4211 unsigned long flags;
4212 u8 fill_rx = 0;
4213 u32 count = 8;
4214 int total_empty;
4215
4216 /* uCode's read idx (stored in shared DRAM) indicates the last Rx
4217 * buffer that the driver may process (last buffer filled by ucode). */
4218 r = le16_to_cpu(rxq->rb_stts->closed_rb_num) & 0x0FFF;
4219 i = rxq->read;
4220
4221 /* Rx interrupt, but nothing sent from uCode */
4222 if (i == r)
4223 D_RX("r = %d, i = %d\n", r, i);
4224
4225 /* calculate total frames need to be restock after handling RX */
4226 total_empty = r - rxq->write_actual;
4227 if (total_empty < 0)
4228 total_empty += RX_QUEUE_SIZE;
4229
4230 if (total_empty > (RX_QUEUE_SIZE / 2))
4231 fill_rx = 1;
4232
4233 while (i != r) {
4234 rxb = rxq->queue[i];
4235
4236 /* If an RXB doesn't have a Rx queue slot associated with it,
4237 * then a bug has been introduced in the queue refilling
4238 * routines -- catch it here */
4239 BUG_ON(rxb == NULL);
4240
4241 rxq->queue[i] = NULL;
4242
4243 dma_unmap_page(&il->pci_dev->dev, rxb->page_dma,
4244 PAGE_SIZE << il->hw_params.rx_page_order,
4245 DMA_FROM_DEVICE);
4246 pkt = rxb_addr(rxb);
4247 reclaim = il_need_reclaim(il, pkt);
4248
4249 /* Based on type of command response or notification,
4250 * handle those that need handling via function in
4251 * handlers table. See il4965_setup_handlers() */
4252 if (il->handlers[pkt->hdr.cmd]) {
4253 D_RX("r = %d, i = %d, %s, 0x%02x\n", r, i,
4254 il_get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
4255 il->isr_stats.handlers[pkt->hdr.cmd]++;
4256 il->handlers[pkt->hdr.cmd] (il, rxb);
4257 } else {
4258 /* No handling needed */
4259 D_RX("r %d i %d No handler needed for %s, 0x%02x\n", r,
4260 i, il_get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
4261 }
4262
4263 /*
4264 * XXX: After here, we should always check rxb->page
4265 * against NULL before touching it or its virtual
4266 * memory (pkt). Because some handler might have
4267 * already taken or freed the pages.
4268 */
4269
4270 if (reclaim) {
4271 /* Invoke any callbacks, transfer the buffer to caller,
4272 * and fire off the (possibly) blocking il_send_cmd()
4273 * as we reclaim the driver command queue */
4274 if (rxb->page)
4275 il_tx_cmd_complete(il, rxb);
4276 else
4277 IL_WARN("Claim null rxb?\n");
4278 }
4279
4280 /* Reuse the page if possible. For notification packets and
4281 * SKBs that fail to Rx correctly, add them back into the
4282 * rx_free list for reuse later. */
4283 spin_lock_irqsave(&rxq->lock, flags);
4284 if (rxb->page != NULL) {
4285 rxb->page_dma =
4286 dma_map_page(&il->pci_dev->dev, rxb->page, 0,
4287 PAGE_SIZE << il->hw_params.rx_page_order,
4288 DMA_FROM_DEVICE);
4289
4290 if (unlikely(dma_mapping_error(&il->pci_dev->dev,
4291 rxb->page_dma))) {
4292 __il_free_pages(il, rxb->page);
4293 rxb->page = NULL;
4294 list_add_tail(&rxb->list, &rxq->rx_used);
4295 } else {
4296 list_add_tail(&rxb->list, &rxq->rx_free);
4297 rxq->free_count++;
4298 }
4299 } else
4300 list_add_tail(&rxb->list, &rxq->rx_used);
4301
4302 spin_unlock_irqrestore(&rxq->lock, flags);
4303
4304 i = (i + 1) & RX_QUEUE_MASK;
4305 /* If there are a lot of unused frames,
4306 * restock the Rx queue so ucode wont assert. */
4307 if (fill_rx) {
4308 count++;
4309 if (count >= 8) {
4310 rxq->read = i;
4311 il4965_rx_replenish_now(il);
4312 count = 0;
4313 }
4314 }
4315 }
4316
4317 /* Backtrack one entry */
4318 rxq->read = i;
4319 if (fill_rx)
4320 il4965_rx_replenish_now(il);
4321 else
4322 il4965_rx_queue_restock(il);
4323}
4324
4325/* call this function to flush any scheduled tasklet */
4326static inline void
4327il4965_synchronize_irq(struct il_priv *il)
4328{
4329 /* wait to make sure we flush pending tasklet */
4330 synchronize_irq(il->pci_dev->irq);
4331 tasklet_kill(&il->irq_tasklet);
4332}
4333
4334static void
4335il4965_irq_tasklet(struct tasklet_struct *t)
4336{
4337 struct il_priv *il = from_tasklet(il, t, irq_tasklet);
4338 u32 inta, handled = 0;
4339 u32 inta_fh;
4340 unsigned long flags;
4341 u32 i;
4342#ifdef CONFIG_IWLEGACY_DEBUG
4343 u32 inta_mask;
4344#endif
4345
4346 spin_lock_irqsave(&il->lock, flags);
4347
4348 /* Ack/clear/reset pending uCode interrupts.
4349 * Note: Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
4350 * and will clear only when CSR_FH_INT_STATUS gets cleared. */
4351 inta = _il_rd(il, CSR_INT);
4352 _il_wr(il, CSR_INT, inta);
4353
4354 /* Ack/clear/reset pending flow-handler (DMA) interrupts.
4355 * Any new interrupts that happen after this, either while we're
4356 * in this tasklet, or later, will show up in next ISR/tasklet. */
4357 inta_fh = _il_rd(il, CSR_FH_INT_STATUS);
4358 _il_wr(il, CSR_FH_INT_STATUS, inta_fh);
4359
4360#ifdef CONFIG_IWLEGACY_DEBUG
4361 if (il_get_debug_level(il) & IL_DL_ISR) {
4362 /* just for debug */
4363 inta_mask = _il_rd(il, CSR_INT_MASK);
4364 D_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n", inta,
4365 inta_mask, inta_fh);
4366 }
4367#endif
4368
4369 spin_unlock_irqrestore(&il->lock, flags);
4370
4371 /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
4372 * atomic, make sure that inta covers all the interrupts that
4373 * we've discovered, even if FH interrupt came in just after
4374 * reading CSR_INT. */
4375 if (inta_fh & CSR49_FH_INT_RX_MASK)
4376 inta |= CSR_INT_BIT_FH_RX;
4377 if (inta_fh & CSR49_FH_INT_TX_MASK)
4378 inta |= CSR_INT_BIT_FH_TX;
4379
4380 /* Now service all interrupt bits discovered above. */
4381 if (inta & CSR_INT_BIT_HW_ERR) {
4382 IL_ERR("Hardware error detected. Restarting.\n");
4383
4384 /* Tell the device to stop sending interrupts */
4385 il_disable_interrupts(il);
4386
4387 il->isr_stats.hw++;
4388 il_irq_handle_error(il);
4389
4390 handled |= CSR_INT_BIT_HW_ERR;
4391
4392 return;
4393 }
4394#ifdef CONFIG_IWLEGACY_DEBUG
4395 if (il_get_debug_level(il) & (IL_DL_ISR)) {
4396 /* NIC fires this, but we don't use it, redundant with WAKEUP */
4397 if (inta & CSR_INT_BIT_SCD) {
4398 D_ISR("Scheduler finished to transmit "
4399 "the frame/frames.\n");
4400 il->isr_stats.sch++;
4401 }
4402
4403 /* Alive notification via Rx interrupt will do the real work */
4404 if (inta & CSR_INT_BIT_ALIVE) {
4405 D_ISR("Alive interrupt\n");
4406 il->isr_stats.alive++;
4407 }
4408 }
4409#endif
4410 /* Safely ignore these bits for debug checks below */
4411 inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
4412
4413 /* HW RF KILL switch toggled */
4414 if (inta & CSR_INT_BIT_RF_KILL) {
4415 int hw_rf_kill = 0;
4416
4417 if (!(_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
4418 hw_rf_kill = 1;
4419
4420 IL_WARN("RF_KILL bit toggled to %s.\n",
4421 hw_rf_kill ? "disable radio" : "enable radio");
4422
4423 il->isr_stats.rfkill++;
4424
4425 /* driver only loads ucode once setting the interface up.
4426 * the driver allows loading the ucode even if the radio
4427 * is killed. Hence update the killswitch state here. The
4428 * rfkill handler will care about restarting if needed.
4429 */
4430 if (hw_rf_kill) {
4431 set_bit(S_RFKILL, &il->status);
4432 } else {
4433 clear_bit(S_RFKILL, &il->status);
4434 il_force_reset(il, true);
4435 }
4436 wiphy_rfkill_set_hw_state(il->hw->wiphy, hw_rf_kill);
4437
4438 handled |= CSR_INT_BIT_RF_KILL;
4439 }
4440
4441 /* Chip got too hot and stopped itself */
4442 if (inta & CSR_INT_BIT_CT_KILL) {
4443 IL_ERR("Microcode CT kill error detected.\n");
4444 il->isr_stats.ctkill++;
4445 handled |= CSR_INT_BIT_CT_KILL;
4446 }
4447
4448 /* Error detected by uCode */
4449 if (inta & CSR_INT_BIT_SW_ERR) {
4450 IL_ERR("Microcode SW error detected. " " Restarting 0x%X.\n",
4451 inta);
4452 il->isr_stats.sw++;
4453 il_irq_handle_error(il);
4454 handled |= CSR_INT_BIT_SW_ERR;
4455 }
4456
4457 /*
4458 * uCode wakes up after power-down sleep.
4459 * Tell device about any new tx or host commands enqueued,
4460 * and about any Rx buffers made available while asleep.
4461 */
4462 if (inta & CSR_INT_BIT_WAKEUP) {
4463 D_ISR("Wakeup interrupt\n");
4464 il_rx_queue_update_write_ptr(il, &il->rxq);
4465 for (i = 0; i < il->hw_params.max_txq_num; i++)
4466 il_txq_update_write_ptr(il, &il->txq[i]);
4467 il->isr_stats.wakeup++;
4468 handled |= CSR_INT_BIT_WAKEUP;
4469 }
4470
4471 /* All uCode command responses, including Tx command responses,
4472 * Rx "responses" (frame-received notification), and other
4473 * notifications from uCode come through here*/
4474 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
4475 il4965_rx_handle(il);
4476 il->isr_stats.rx++;
4477 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
4478 }
4479
4480 /* This "Tx" DMA channel is used only for loading uCode */
4481 if (inta & CSR_INT_BIT_FH_TX) {
4482 D_ISR("uCode load interrupt\n");
4483 il->isr_stats.tx++;
4484 handled |= CSR_INT_BIT_FH_TX;
4485 /* Wake up uCode load routine, now that load is complete */
4486 il->ucode_write_complete = 1;
4487 wake_up(&il->wait_command_queue);
4488 }
4489
4490 if (inta & ~handled) {
4491 IL_ERR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
4492 il->isr_stats.unhandled++;
4493 }
4494
4495 if (inta & ~(il->inta_mask)) {
4496 IL_WARN("Disabled INTA bits 0x%08x were pending\n",
4497 inta & ~il->inta_mask);
4498 IL_WARN(" with FH49_INT = 0x%08x\n", inta_fh);
4499 }
4500
4501 /* Re-enable all interrupts */
4502 /* only Re-enable if disabled by irq */
4503 if (test_bit(S_INT_ENABLED, &il->status))
4504 il_enable_interrupts(il);
4505 /* Re-enable RF_KILL if it occurred */
4506 else if (handled & CSR_INT_BIT_RF_KILL)
4507 il_enable_rfkill_int(il);
4508
4509#ifdef CONFIG_IWLEGACY_DEBUG
4510 if (il_get_debug_level(il) & (IL_DL_ISR)) {
4511 inta = _il_rd(il, CSR_INT);
4512 inta_mask = _il_rd(il, CSR_INT_MASK);
4513 inta_fh = _il_rd(il, CSR_FH_INT_STATUS);
4514 D_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
4515 "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
4516 }
4517#endif
4518}
4519
4520/*****************************************************************************
4521 *
4522 * sysfs attributes
4523 *
4524 *****************************************************************************/
4525
4526#ifdef CONFIG_IWLEGACY_DEBUG
4527
4528/*
4529 * The following adds a new attribute to the sysfs representation
4530 * of this device driver (i.e. a new file in /sys/class/net/wlan0/device/)
4531 * used for controlling the debug level.
4532 *
4533 * See the level definitions in iwl for details.
4534 *
4535 * The debug_level being managed using sysfs below is a per device debug
4536 * level that is used instead of the global debug level if it (the per
4537 * device debug level) is set.
4538 */
4539static ssize_t
4540il4965_show_debug_level(struct device *d, struct device_attribute *attr,
4541 char *buf)
4542{
4543 struct il_priv *il = dev_get_drvdata(d);
4544 return sprintf(buf, "0x%08X\n", il_get_debug_level(il));
4545}
4546
4547static ssize_t
4548il4965_store_debug_level(struct device *d, struct device_attribute *attr,
4549 const char *buf, size_t count)
4550{
4551 struct il_priv *il = dev_get_drvdata(d);
4552 unsigned long val;
4553 int ret;
4554
4555 ret = kstrtoul(buf, 0, &val);
4556 if (ret)
4557 IL_ERR("%s is not in hex or decimal form.\n", buf);
4558 else
4559 il->debug_level = val;
4560
4561 return strnlen(buf, count);
4562}
4563
4564static DEVICE_ATTR(debug_level, 0644, il4965_show_debug_level,
4565 il4965_store_debug_level);
4566
4567#endif /* CONFIG_IWLEGACY_DEBUG */
4568
4569static ssize_t
4570il4965_show_temperature(struct device *d, struct device_attribute *attr,
4571 char *buf)
4572{
4573 struct il_priv *il = dev_get_drvdata(d);
4574
4575 if (!il_is_alive(il))
4576 return -EAGAIN;
4577
4578 return sprintf(buf, "%d\n", il->temperature);
4579}
4580
4581static DEVICE_ATTR(temperature, 0444, il4965_show_temperature, NULL);
4582
4583static ssize_t
4584il4965_show_tx_power(struct device *d, struct device_attribute *attr, char *buf)
4585{
4586 struct il_priv *il = dev_get_drvdata(d);
4587
4588 if (!il_is_ready_rf(il))
4589 return sprintf(buf, "off\n");
4590 else
4591 return sprintf(buf, "%d\n", il->tx_power_user_lmt);
4592}
4593
4594static ssize_t
4595il4965_store_tx_power(struct device *d, struct device_attribute *attr,
4596 const char *buf, size_t count)
4597{
4598 struct il_priv *il = dev_get_drvdata(d);
4599 unsigned long val;
4600 int ret;
4601
4602 ret = kstrtoul(buf, 10, &val);
4603 if (ret)
4604 IL_INFO("%s is not in decimal form.\n", buf);
4605 else {
4606 ret = il_set_tx_power(il, val, false);
4607 if (ret)
4608 IL_ERR("failed setting tx power (0x%08x).\n", ret);
4609 else
4610 ret = count;
4611 }
4612 return ret;
4613}
4614
4615static DEVICE_ATTR(tx_power, 0644, il4965_show_tx_power,
4616 il4965_store_tx_power);
4617
4618static struct attribute *il_sysfs_entries[] = {
4619 &dev_attr_temperature.attr,
4620 &dev_attr_tx_power.attr,
4621#ifdef CONFIG_IWLEGACY_DEBUG
4622 &dev_attr_debug_level.attr,
4623#endif
4624 NULL
4625};
4626
4627static const struct attribute_group il_attribute_group = {
4628 .name = NULL, /* put in device directory */
4629 .attrs = il_sysfs_entries,
4630};
4631
4632/******************************************************************************
4633 *
4634 * uCode download functions
4635 *
4636 ******************************************************************************/
4637
4638static void
4639il4965_dealloc_ucode_pci(struct il_priv *il)
4640{
4641 il_free_fw_desc(il->pci_dev, &il->ucode_code);
4642 il_free_fw_desc(il->pci_dev, &il->ucode_data);
4643 il_free_fw_desc(il->pci_dev, &il->ucode_data_backup);
4644 il_free_fw_desc(il->pci_dev, &il->ucode_init);
4645 il_free_fw_desc(il->pci_dev, &il->ucode_init_data);
4646 il_free_fw_desc(il->pci_dev, &il->ucode_boot);
4647}
4648
4649static void
4650il4965_nic_start(struct il_priv *il)
4651{
4652 /* Remove all resets to allow NIC to operate */
4653 _il_wr(il, CSR_RESET, 0);
4654}
4655
4656static void il4965_ucode_callback(const struct firmware *ucode_raw,
4657 void *context);
4658static int il4965_mac_setup_register(struct il_priv *il, u32 max_probe_length);
4659
4660static int __must_check
4661il4965_request_firmware(struct il_priv *il, bool first)
4662{
4663 const char *name_pre = il->cfg->fw_name_pre;
4664 char tag[8];
4665
4666 if (first) {
4667 il->fw_idx = il->cfg->ucode_api_max;
4668 sprintf(tag, "%d", il->fw_idx);
4669 } else {
4670 il->fw_idx--;
4671 sprintf(tag, "%d", il->fw_idx);
4672 }
4673
4674 if (il->fw_idx < il->cfg->ucode_api_min) {
4675 IL_ERR("no suitable firmware found!\n");
4676 return -ENOENT;
4677 }
4678
4679 sprintf(il->firmware_name, "%s%s%s", name_pre, tag, ".ucode");
4680
4681 D_INFO("attempting to load firmware '%s'\n", il->firmware_name);
4682
4683 return request_firmware_nowait(THIS_MODULE, 1, il->firmware_name,
4684 &il->pci_dev->dev, GFP_KERNEL, il,
4685 il4965_ucode_callback);
4686}
4687
4688struct il4965_firmware_pieces {
4689 const void *inst, *data, *init, *init_data, *boot;
4690 size_t inst_size, data_size, init_size, init_data_size, boot_size;
4691};
4692
4693static int
4694il4965_load_firmware(struct il_priv *il, const struct firmware *ucode_raw,
4695 struct il4965_firmware_pieces *pieces)
4696{
4697 struct il_ucode_header *ucode = (void *)ucode_raw->data;
4698 u32 api_ver, hdr_size;
4699 const u8 *src;
4700
4701 il->ucode_ver = le32_to_cpu(ucode->ver);
4702 api_ver = IL_UCODE_API(il->ucode_ver);
4703
4704 switch (api_ver) {
4705 default:
4706 case 0:
4707 case 1:
4708 case 2:
4709 hdr_size = 24;
4710 if (ucode_raw->size < hdr_size) {
4711 IL_ERR("File size too small!\n");
4712 return -EINVAL;
4713 }
4714 pieces->inst_size = le32_to_cpu(ucode->v1.inst_size);
4715 pieces->data_size = le32_to_cpu(ucode->v1.data_size);
4716 pieces->init_size = le32_to_cpu(ucode->v1.init_size);
4717 pieces->init_data_size = le32_to_cpu(ucode->v1.init_data_size);
4718 pieces->boot_size = le32_to_cpu(ucode->v1.boot_size);
4719 src = ucode->v1.data;
4720 break;
4721 }
4722
4723 /* Verify size of file vs. image size info in file's header */
4724 if (ucode_raw->size !=
4725 hdr_size + pieces->inst_size + pieces->data_size +
4726 pieces->init_size + pieces->init_data_size + pieces->boot_size) {
4727
4728 IL_ERR("uCode file size %d does not match expected size\n",
4729 (int)ucode_raw->size);
4730 return -EINVAL;
4731 }
4732
4733 pieces->inst = src;
4734 src += pieces->inst_size;
4735 pieces->data = src;
4736 src += pieces->data_size;
4737 pieces->init = src;
4738 src += pieces->init_size;
4739 pieces->init_data = src;
4740 src += pieces->init_data_size;
4741 pieces->boot = src;
4742 src += pieces->boot_size;
4743
4744 return 0;
4745}
4746
4747/*
4748 * il4965_ucode_callback - callback when firmware was loaded
4749 *
4750 * If loaded successfully, copies the firmware into buffers
4751 * for the card to fetch (via DMA).
4752 */
4753static void
4754il4965_ucode_callback(const struct firmware *ucode_raw, void *context)
4755{
4756 struct il_priv *il = context;
4757 int err;
4758 struct il4965_firmware_pieces pieces;
4759 const unsigned int api_max = il->cfg->ucode_api_max;
4760 const unsigned int api_min = il->cfg->ucode_api_min;
4761 u32 api_ver;
4762
4763 u32 max_probe_length = 200;
4764 u32 standard_phy_calibration_size =
4765 IL_DEFAULT_STANDARD_PHY_CALIBRATE_TBL_SIZE;
4766
4767 memset(&pieces, 0, sizeof(pieces));
4768
4769 if (!ucode_raw) {
4770 if (il->fw_idx <= il->cfg->ucode_api_max)
4771 IL_ERR("request for firmware file '%s' failed.\n",
4772 il->firmware_name);
4773 goto try_again;
4774 }
4775
4776 D_INFO("Loaded firmware file '%s' (%zd bytes).\n", il->firmware_name,
4777 ucode_raw->size);
4778
4779 /* Make sure that we got at least the API version number */
4780 if (ucode_raw->size < 4) {
4781 IL_ERR("File size way too small!\n");
4782 goto try_again;
4783 }
4784
4785 /* Data from ucode file: header followed by uCode images */
4786 err = il4965_load_firmware(il, ucode_raw, &pieces);
4787
4788 if (err)
4789 goto try_again;
4790
4791 api_ver = IL_UCODE_API(il->ucode_ver);
4792
4793 /*
4794 * api_ver should match the api version forming part of the
4795 * firmware filename ... but we don't check for that and only rely
4796 * on the API version read from firmware header from here on forward
4797 */
4798 if (api_ver < api_min || api_ver > api_max) {
4799 IL_ERR("Driver unable to support your firmware API. "
4800 "Driver supports v%u, firmware is v%u.\n", api_max,
4801 api_ver);
4802 goto try_again;
4803 }
4804
4805 if (api_ver != api_max)
4806 IL_ERR("Firmware has old API version. Expected v%u, "
4807 "got v%u. New firmware can be obtained "
4808 "from http://www.intellinuxwireless.org.\n", api_max,
4809 api_ver);
4810
4811 IL_INFO("loaded firmware version %u.%u.%u.%u\n",
4812 IL_UCODE_MAJOR(il->ucode_ver), IL_UCODE_MINOR(il->ucode_ver),
4813 IL_UCODE_API(il->ucode_ver), IL_UCODE_SERIAL(il->ucode_ver));
4814
4815 snprintf(il->hw->wiphy->fw_version, sizeof(il->hw->wiphy->fw_version),
4816 "%u.%u.%u.%u", IL_UCODE_MAJOR(il->ucode_ver),
4817 IL_UCODE_MINOR(il->ucode_ver), IL_UCODE_API(il->ucode_ver),
4818 IL_UCODE_SERIAL(il->ucode_ver));
4819
4820 /*
4821 * For any of the failures below (before allocating pci memory)
4822 * we will try to load a version with a smaller API -- maybe the
4823 * user just got a corrupted version of the latest API.
4824 */
4825
4826 D_INFO("f/w package hdr ucode version raw = 0x%x\n", il->ucode_ver);
4827 D_INFO("f/w package hdr runtime inst size = %zd\n", pieces.inst_size);
4828 D_INFO("f/w package hdr runtime data size = %zd\n", pieces.data_size);
4829 D_INFO("f/w package hdr init inst size = %zd\n", pieces.init_size);
4830 D_INFO("f/w package hdr init data size = %zd\n", pieces.init_data_size);
4831 D_INFO("f/w package hdr boot inst size = %zd\n", pieces.boot_size);
4832
4833 /* Verify that uCode images will fit in card's SRAM */
4834 if (pieces.inst_size > il->hw_params.max_inst_size) {
4835 IL_ERR("uCode instr len %zd too large to fit in\n",
4836 pieces.inst_size);
4837 goto try_again;
4838 }
4839
4840 if (pieces.data_size > il->hw_params.max_data_size) {
4841 IL_ERR("uCode data len %zd too large to fit in\n",
4842 pieces.data_size);
4843 goto try_again;
4844 }
4845
4846 if (pieces.init_size > il->hw_params.max_inst_size) {
4847 IL_ERR("uCode init instr len %zd too large to fit in\n",
4848 pieces.init_size);
4849 goto try_again;
4850 }
4851
4852 if (pieces.init_data_size > il->hw_params.max_data_size) {
4853 IL_ERR("uCode init data len %zd too large to fit in\n",
4854 pieces.init_data_size);
4855 goto try_again;
4856 }
4857
4858 if (pieces.boot_size > il->hw_params.max_bsm_size) {
4859 IL_ERR("uCode boot instr len %zd too large to fit in\n",
4860 pieces.boot_size);
4861 goto try_again;
4862 }
4863
4864 /* Allocate ucode buffers for card's bus-master loading ... */
4865
4866 /* Runtime instructions and 2 copies of data:
4867 * 1) unmodified from disk
4868 * 2) backup cache for save/restore during power-downs */
4869 il->ucode_code.len = pieces.inst_size;
4870 il_alloc_fw_desc(il->pci_dev, &il->ucode_code);
4871
4872 il->ucode_data.len = pieces.data_size;
4873 il_alloc_fw_desc(il->pci_dev, &il->ucode_data);
4874
4875 il->ucode_data_backup.len = pieces.data_size;
4876 il_alloc_fw_desc(il->pci_dev, &il->ucode_data_backup);
4877
4878 if (!il->ucode_code.v_addr || !il->ucode_data.v_addr ||
4879 !il->ucode_data_backup.v_addr)
4880 goto err_pci_alloc;
4881
4882 /* Initialization instructions and data */
4883 if (pieces.init_size && pieces.init_data_size) {
4884 il->ucode_init.len = pieces.init_size;
4885 il_alloc_fw_desc(il->pci_dev, &il->ucode_init);
4886
4887 il->ucode_init_data.len = pieces.init_data_size;
4888 il_alloc_fw_desc(il->pci_dev, &il->ucode_init_data);
4889
4890 if (!il->ucode_init.v_addr || !il->ucode_init_data.v_addr)
4891 goto err_pci_alloc;
4892 }
4893
4894 /* Bootstrap (instructions only, no data) */
4895 if (pieces.boot_size) {
4896 il->ucode_boot.len = pieces.boot_size;
4897 il_alloc_fw_desc(il->pci_dev, &il->ucode_boot);
4898
4899 if (!il->ucode_boot.v_addr)
4900 goto err_pci_alloc;
4901 }
4902
4903 /* Now that we can no longer fail, copy information */
4904
4905 il->sta_key_max_num = STA_KEY_MAX_NUM;
4906
4907 /* Copy images into buffers for card's bus-master reads ... */
4908
4909 /* Runtime instructions (first block of data in file) */
4910 D_INFO("Copying (but not loading) uCode instr len %zd\n",
4911 pieces.inst_size);
4912 memcpy(il->ucode_code.v_addr, pieces.inst, pieces.inst_size);
4913
4914 D_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
4915 il->ucode_code.v_addr, (u32) il->ucode_code.p_addr);
4916
4917 /*
4918 * Runtime data
4919 * NOTE: Copy into backup buffer will be done in il_up()
4920 */
4921 D_INFO("Copying (but not loading) uCode data len %zd\n",
4922 pieces.data_size);
4923 memcpy(il->ucode_data.v_addr, pieces.data, pieces.data_size);
4924 memcpy(il->ucode_data_backup.v_addr, pieces.data, pieces.data_size);
4925
4926 /* Initialization instructions */
4927 if (pieces.init_size) {
4928 D_INFO("Copying (but not loading) init instr len %zd\n",
4929 pieces.init_size);
4930 memcpy(il->ucode_init.v_addr, pieces.init, pieces.init_size);
4931 }
4932
4933 /* Initialization data */
4934 if (pieces.init_data_size) {
4935 D_INFO("Copying (but not loading) init data len %zd\n",
4936 pieces.init_data_size);
4937 memcpy(il->ucode_init_data.v_addr, pieces.init_data,
4938 pieces.init_data_size);
4939 }
4940
4941 /* Bootstrap instructions */
4942 D_INFO("Copying (but not loading) boot instr len %zd\n",
4943 pieces.boot_size);
4944 memcpy(il->ucode_boot.v_addr, pieces.boot, pieces.boot_size);
4945
4946 /*
4947 * figure out the offset of chain noise reset and gain commands
4948 * base on the size of standard phy calibration commands table size
4949 */
4950 il->_4965.phy_calib_chain_noise_reset_cmd =
4951 standard_phy_calibration_size;
4952 il->_4965.phy_calib_chain_noise_gain_cmd =
4953 standard_phy_calibration_size + 1;
4954
4955 /**************************************************
4956 * This is still part of probe() in a sense...
4957 *
4958 * 9. Setup and register with mac80211 and debugfs
4959 **************************************************/
4960 err = il4965_mac_setup_register(il, max_probe_length);
4961 if (err)
4962 goto out_unbind;
4963
4964 il_dbgfs_register(il, DRV_NAME);
4965
4966 err = sysfs_create_group(&il->pci_dev->dev.kobj, &il_attribute_group);
4967 if (err) {
4968 IL_ERR("failed to create sysfs device attributes\n");
4969 goto out_unbind;
4970 }
4971
4972 /* We have our copies now, allow OS release its copies */
4973 release_firmware(ucode_raw);
4974 complete(&il->_4965.firmware_loading_complete);
4975 return;
4976
4977try_again:
4978 /* try next, if any */
4979 if (il4965_request_firmware(il, false))
4980 goto out_unbind;
4981 release_firmware(ucode_raw);
4982 return;
4983
4984err_pci_alloc:
4985 IL_ERR("failed to allocate pci memory\n");
4986 il4965_dealloc_ucode_pci(il);
4987out_unbind:
4988 complete(&il->_4965.firmware_loading_complete);
4989 device_release_driver(&il->pci_dev->dev);
4990 release_firmware(ucode_raw);
4991}
4992
4993static const char *const desc_lookup_text[] = {
4994 "OK",
4995 "FAIL",
4996 "BAD_PARAM",
4997 "BAD_CHECKSUM",
4998 "NMI_INTERRUPT_WDG",
4999 "SYSASSERT",
5000 "FATAL_ERROR",
5001 "BAD_COMMAND",
5002 "HW_ERROR_TUNE_LOCK",
5003 "HW_ERROR_TEMPERATURE",
5004 "ILLEGAL_CHAN_FREQ",
5005 "VCC_NOT_STBL",
5006 "FH49_ERROR",
5007 "NMI_INTERRUPT_HOST",
5008 "NMI_INTERRUPT_ACTION_PT",
5009 "NMI_INTERRUPT_UNKNOWN",
5010 "UCODE_VERSION_MISMATCH",
5011 "HW_ERROR_ABS_LOCK",
5012 "HW_ERROR_CAL_LOCK_FAIL",
5013 "NMI_INTERRUPT_INST_ACTION_PT",
5014 "NMI_INTERRUPT_DATA_ACTION_PT",
5015 "NMI_TRM_HW_ER",
5016 "NMI_INTERRUPT_TRM",
5017 "NMI_INTERRUPT_BREAK_POINT",
5018 "DEBUG_0",
5019 "DEBUG_1",
5020 "DEBUG_2",
5021 "DEBUG_3",
5022};
5023
5024static struct {
5025 char *name;
5026 u8 num;
5027} advanced_lookup[] = {
5028 {
5029 "NMI_INTERRUPT_WDG", 0x34}, {
5030 "SYSASSERT", 0x35}, {
5031 "UCODE_VERSION_MISMATCH", 0x37}, {
5032 "BAD_COMMAND", 0x38}, {
5033 "NMI_INTERRUPT_DATA_ACTION_PT", 0x3C}, {
5034 "FATAL_ERROR", 0x3D}, {
5035 "NMI_TRM_HW_ERR", 0x46}, {
5036 "NMI_INTERRUPT_TRM", 0x4C}, {
5037 "NMI_INTERRUPT_BREAK_POINT", 0x54}, {
5038 "NMI_INTERRUPT_WDG_RXF_FULL", 0x5C}, {
5039 "NMI_INTERRUPT_WDG_NO_RBD_RXF_FULL", 0x64}, {
5040 "NMI_INTERRUPT_HOST", 0x66}, {
5041 "NMI_INTERRUPT_ACTION_PT", 0x7C}, {
5042 "NMI_INTERRUPT_UNKNOWN", 0x84}, {
5043 "NMI_INTERRUPT_INST_ACTION_PT", 0x86}, {
5044"ADVANCED_SYSASSERT", 0},};
5045
5046static const char *
5047il4965_desc_lookup(u32 num)
5048{
5049 int i;
5050 int max = ARRAY_SIZE(desc_lookup_text);
5051
5052 if (num < max)
5053 return desc_lookup_text[num];
5054
5055 max = ARRAY_SIZE(advanced_lookup) - 1;
5056 for (i = 0; i < max; i++) {
5057 if (advanced_lookup[i].num == num)
5058 break;
5059 }
5060 return advanced_lookup[i].name;
5061}
5062
5063#define ERROR_START_OFFSET (1 * sizeof(u32))
5064#define ERROR_ELEM_SIZE (7 * sizeof(u32))
5065
5066void
5067il4965_dump_nic_error_log(struct il_priv *il)
5068{
5069 u32 data2, line;
5070 u32 desc, time, count, base, data1;
5071 u32 blink1, blink2, ilink1, ilink2;
5072 u32 pc, hcmd;
5073
5074 if (il->ucode_type == UCODE_INIT)
5075 base = le32_to_cpu(il->card_alive_init.error_event_table_ptr);
5076 else
5077 base = le32_to_cpu(il->card_alive.error_event_table_ptr);
5078
5079 if (!il->ops->is_valid_rtc_data_addr(base)) {
5080 IL_ERR("Not valid error log pointer 0x%08X for %s uCode\n",
5081 base, (il->ucode_type == UCODE_INIT) ? "Init" : "RT");
5082 return;
5083 }
5084
5085 count = il_read_targ_mem(il, base);
5086
5087 if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
5088 IL_ERR("Start IWL Error Log Dump:\n");
5089 IL_ERR("Status: 0x%08lX, count: %d\n", il->status, count);
5090 }
5091
5092 desc = il_read_targ_mem(il, base + 1 * sizeof(u32));
5093 il->isr_stats.err_code = desc;
5094 pc = il_read_targ_mem(il, base + 2 * sizeof(u32));
5095 blink1 = il_read_targ_mem(il, base + 3 * sizeof(u32));
5096 blink2 = il_read_targ_mem(il, base + 4 * sizeof(u32));
5097 ilink1 = il_read_targ_mem(il, base + 5 * sizeof(u32));
5098 ilink2 = il_read_targ_mem(il, base + 6 * sizeof(u32));
5099 data1 = il_read_targ_mem(il, base + 7 * sizeof(u32));
5100 data2 = il_read_targ_mem(il, base + 8 * sizeof(u32));
5101 line = il_read_targ_mem(il, base + 9 * sizeof(u32));
5102 time = il_read_targ_mem(il, base + 11 * sizeof(u32));
5103 hcmd = il_read_targ_mem(il, base + 22 * sizeof(u32));
5104
5105 IL_ERR("Desc Time "
5106 "data1 data2 line\n");
5107 IL_ERR("%-28s (0x%04X) %010u 0x%08X 0x%08X %u\n",
5108 il4965_desc_lookup(desc), desc, time, data1, data2, line);
5109 IL_ERR("pc blink1 blink2 ilink1 ilink2 hcmd\n");
5110 IL_ERR("0x%05X 0x%05X 0x%05X 0x%05X 0x%05X 0x%05X\n", pc, blink1,
5111 blink2, ilink1, ilink2, hcmd);
5112}
5113
5114static void
5115il4965_rf_kill_ct_config(struct il_priv *il)
5116{
5117 struct il_ct_kill_config cmd;
5118 unsigned long flags;
5119 int ret = 0;
5120
5121 spin_lock_irqsave(&il->lock, flags);
5122 _il_wr(il, CSR_UCODE_DRV_GP1_CLR,
5123 CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
5124 spin_unlock_irqrestore(&il->lock, flags);
5125
5126 cmd.critical_temperature_R =
5127 cpu_to_le32(il->hw_params.ct_kill_threshold);
5128
5129 ret = il_send_cmd_pdu(il, C_CT_KILL_CONFIG, sizeof(cmd), &cmd);
5130 if (ret)
5131 IL_ERR("C_CT_KILL_CONFIG failed\n");
5132 else
5133 D_INFO("C_CT_KILL_CONFIG " "succeeded, "
5134 "critical temperature is %d\n",
5135 il->hw_params.ct_kill_threshold);
5136}
5137
5138static const s8 default_queue_to_tx_fifo[] = {
5139 IL_TX_FIFO_VO,
5140 IL_TX_FIFO_VI,
5141 IL_TX_FIFO_BE,
5142 IL_TX_FIFO_BK,
5143 IL49_CMD_FIFO_NUM,
5144 IL_TX_FIFO_UNUSED,
5145 IL_TX_FIFO_UNUSED,
5146};
5147
5148#define IL_MASK(lo, hi) ((1 << (hi)) | ((1 << (hi)) - (1 << (lo))))
5149
5150static int
5151il4965_alive_notify(struct il_priv *il)
5152{
5153 u32 a;
5154 unsigned long flags;
5155 int i, chan;
5156 u32 reg_val;
5157
5158 spin_lock_irqsave(&il->lock, flags);
5159
5160 /* Clear 4965's internal Tx Scheduler data base */
5161 il->scd_base_addr = il_rd_prph(il, IL49_SCD_SRAM_BASE_ADDR);
5162 a = il->scd_base_addr + IL49_SCD_CONTEXT_DATA_OFFSET;
5163 for (; a < il->scd_base_addr + IL49_SCD_TX_STTS_BITMAP_OFFSET; a += 4)
5164 il_write_targ_mem(il, a, 0);
5165 for (; a < il->scd_base_addr + IL49_SCD_TRANSLATE_TBL_OFFSET; a += 4)
5166 il_write_targ_mem(il, a, 0);
5167 for (;
5168 a <
5169 il->scd_base_addr +
5170 IL49_SCD_TRANSLATE_TBL_OFFSET_QUEUE(il->hw_params.max_txq_num);
5171 a += 4)
5172 il_write_targ_mem(il, a, 0);
5173
5174 /* Tel 4965 where to find Tx byte count tables */
5175 il_wr_prph(il, IL49_SCD_DRAM_BASE_ADDR, il->scd_bc_tbls.dma >> 10);
5176
5177 /* Enable DMA channel */
5178 for (chan = 0; chan < FH49_TCSR_CHNL_NUM; chan++)
5179 il_wr(il, FH49_TCSR_CHNL_TX_CONFIG_REG(chan),
5180 FH49_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE |
5181 FH49_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE);
5182
5183 /* Update FH chicken bits */
5184 reg_val = il_rd(il, FH49_TX_CHICKEN_BITS_REG);
5185 il_wr(il, FH49_TX_CHICKEN_BITS_REG,
5186 reg_val | FH49_TX_CHICKEN_BITS_SCD_AUTO_RETRY_EN);
5187
5188 /* Disable chain mode for all queues */
5189 il_wr_prph(il, IL49_SCD_QUEUECHAIN_SEL, 0);
5190
5191 /* Initialize each Tx queue (including the command queue) */
5192 for (i = 0; i < il->hw_params.max_txq_num; i++) {
5193
5194 /* TFD circular buffer read/write idxes */
5195 il_wr_prph(il, IL49_SCD_QUEUE_RDPTR(i), 0);
5196 il_wr(il, HBUS_TARG_WRPTR, 0 | (i << 8));
5197
5198 /* Max Tx Window size for Scheduler-ACK mode */
5199 il_write_targ_mem(il,
5200 il->scd_base_addr +
5201 IL49_SCD_CONTEXT_QUEUE_OFFSET(i),
5202 (SCD_WIN_SIZE <<
5203 IL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
5204 IL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
5205
5206 /* Frame limit */
5207 il_write_targ_mem(il,
5208 il->scd_base_addr +
5209 IL49_SCD_CONTEXT_QUEUE_OFFSET(i) +
5210 sizeof(u32),
5211 (SCD_FRAME_LIMIT <<
5212 IL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) &
5213 IL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
5214
5215 }
5216 il_wr_prph(il, IL49_SCD_INTERRUPT_MASK,
5217 (1 << il->hw_params.max_txq_num) - 1);
5218
5219 /* Activate all Tx DMA/FIFO channels */
5220 il4965_txq_set_sched(il, IL_MASK(0, 6));
5221
5222 il4965_set_wr_ptrs(il, IL_DEFAULT_CMD_QUEUE_NUM, 0);
5223
5224 /* make sure all queue are not stopped */
5225 memset(&il->queue_stopped[0], 0, sizeof(il->queue_stopped));
5226 for (i = 0; i < 4; i++)
5227 atomic_set(&il->queue_stop_count[i], 0);
5228
5229 /* reset to 0 to enable all the queue first */
5230 il->txq_ctx_active_msk = 0;
5231 /* Map each Tx/cmd queue to its corresponding fifo */
5232 BUILD_BUG_ON(ARRAY_SIZE(default_queue_to_tx_fifo) != 7);
5233
5234 for (i = 0; i < ARRAY_SIZE(default_queue_to_tx_fifo); i++) {
5235 int ac = default_queue_to_tx_fifo[i];
5236
5237 il_txq_ctx_activate(il, i);
5238
5239 if (ac == IL_TX_FIFO_UNUSED)
5240 continue;
5241
5242 il4965_tx_queue_set_status(il, &il->txq[i], ac, 0);
5243 }
5244
5245 spin_unlock_irqrestore(&il->lock, flags);
5246
5247 return 0;
5248}
5249
5250/*
5251 * il4965_alive_start - called after N_ALIVE notification received
5252 * from protocol/runtime uCode (initialization uCode's
5253 * Alive gets handled by il_init_alive_start()).
5254 */
5255static void
5256il4965_alive_start(struct il_priv *il)
5257{
5258 int ret = 0;
5259
5260 D_INFO("Runtime Alive received.\n");
5261
5262 if (il->card_alive.is_valid != UCODE_VALID_OK) {
5263 /* We had an error bringing up the hardware, so take it
5264 * all the way back down so we can try again */
5265 D_INFO("Alive failed.\n");
5266 goto restart;
5267 }
5268
5269 /* Initialize uCode has loaded Runtime uCode ... verify inst image.
5270 * This is a paranoid check, because we would not have gotten the
5271 * "runtime" alive if code weren't properly loaded. */
5272 if (il4965_verify_ucode(il)) {
5273 /* Runtime instruction load was bad;
5274 * take it all the way back down so we can try again */
5275 D_INFO("Bad runtime uCode load.\n");
5276 goto restart;
5277 }
5278
5279 ret = il4965_alive_notify(il);
5280 if (ret) {
5281 IL_WARN("Could not complete ALIVE transition [ntf]: %d\n", ret);
5282 goto restart;
5283 }
5284
5285 /* After the ALIVE response, we can send host commands to the uCode */
5286 set_bit(S_ALIVE, &il->status);
5287
5288 /* Enable watchdog to monitor the driver tx queues */
5289 il_setup_watchdog(il);
5290
5291 if (il_is_rfkill(il))
5292 return;
5293
5294 ieee80211_wake_queues(il->hw);
5295
5296 il->active_rate = RATES_MASK;
5297
5298 il_power_update_mode(il, true);
5299 D_INFO("Updated power mode\n");
5300
5301 if (il_is_associated(il)) {
5302 struct il_rxon_cmd *active_rxon =
5303 (struct il_rxon_cmd *)&il->active;
5304 /* apply any changes in staging */
5305 il->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
5306 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5307 } else {
5308 /* Initialize our rx_config data */
5309 il_connection_init_rx_config(il);
5310
5311 if (il->ops->set_rxon_chain)
5312 il->ops->set_rxon_chain(il);
5313 }
5314
5315 /* Configure bluetooth coexistence if enabled */
5316 il_send_bt_config(il);
5317
5318 il4965_reset_run_time_calib(il);
5319
5320 set_bit(S_READY, &il->status);
5321
5322 /* Configure the adapter for unassociated operation */
5323 il_commit_rxon(il);
5324
5325 /* At this point, the NIC is initialized and operational */
5326 il4965_rf_kill_ct_config(il);
5327
5328 D_INFO("ALIVE processing complete.\n");
5329 wake_up(&il->wait_command_queue);
5330
5331 return;
5332
5333restart:
5334 queue_work(il->workqueue, &il->restart);
5335}
5336
5337static void il4965_cancel_deferred_work(struct il_priv *il);
5338
5339static void
5340__il4965_down(struct il_priv *il)
5341{
5342 unsigned long flags;
5343 int exit_pending;
5344
5345 D_INFO(DRV_NAME " is going down\n");
5346
5347 il_scan_cancel_timeout(il, 200);
5348
5349 exit_pending = test_and_set_bit(S_EXIT_PENDING, &il->status);
5350
5351 /* Stop TX queues watchdog. We need to have S_EXIT_PENDING bit set
5352 * to prevent rearm timer */
5353 del_timer_sync(&il->watchdog);
5354
5355 il_clear_ucode_stations(il);
5356
5357 /* FIXME: race conditions ? */
5358 spin_lock_irq(&il->sta_lock);
5359 /*
5360 * Remove all key information that is not stored as part
5361 * of station information since mac80211 may not have had
5362 * a chance to remove all the keys. When device is
5363 * reconfigured by mac80211 after an error all keys will
5364 * be reconfigured.
5365 */
5366 memset(il->_4965.wep_keys, 0, sizeof(il->_4965.wep_keys));
5367 il->_4965.key_mapping_keys = 0;
5368 spin_unlock_irq(&il->sta_lock);
5369
5370 il_dealloc_bcast_stations(il);
5371 il_clear_driver_stations(il);
5372
5373 /* Unblock any waiting calls */
5374 wake_up_all(&il->wait_command_queue);
5375
5376 /* Wipe out the EXIT_PENDING status bit if we are not actually
5377 * exiting the module */
5378 if (!exit_pending)
5379 clear_bit(S_EXIT_PENDING, &il->status);
5380
5381 /* stop and reset the on-board processor */
5382 _il_wr(il, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
5383
5384 /* tell the device to stop sending interrupts */
5385 spin_lock_irqsave(&il->lock, flags);
5386 il_disable_interrupts(il);
5387 spin_unlock_irqrestore(&il->lock, flags);
5388 il4965_synchronize_irq(il);
5389
5390 if (il->mac80211_registered)
5391 ieee80211_stop_queues(il->hw);
5392
5393 /* If we have not previously called il_init() then
5394 * clear all bits but the RF Kill bit and return */
5395 if (!il_is_init(il)) {
5396 il->status =
5397 test_bit(S_RFKILL, &il->status) << S_RFKILL |
5398 test_bit(S_GEO_CONFIGURED, &il->status) << S_GEO_CONFIGURED |
5399 test_bit(S_EXIT_PENDING, &il->status) << S_EXIT_PENDING;
5400 goto exit;
5401 }
5402
5403 /* ...otherwise clear out all the status bits but the RF Kill
5404 * bit and continue taking the NIC down. */
5405 il->status &=
5406 test_bit(S_RFKILL, &il->status) << S_RFKILL |
5407 test_bit(S_GEO_CONFIGURED, &il->status) << S_GEO_CONFIGURED |
5408 test_bit(S_FW_ERROR, &il->status) << S_FW_ERROR |
5409 test_bit(S_EXIT_PENDING, &il->status) << S_EXIT_PENDING;
5410
5411 /*
5412 * We disabled and synchronized interrupt, and priv->mutex is taken, so
5413 * here is the only thread which will program device registers, but
5414 * still have lockdep assertions, so we are taking reg_lock.
5415 */
5416 spin_lock_irq(&il->reg_lock);
5417 /* FIXME: il_grab_nic_access if rfkill is off ? */
5418
5419 il4965_txq_ctx_stop(il);
5420 il4965_rxq_stop(il);
5421 /* Power-down device's busmaster DMA clocks */
5422 _il_wr_prph(il, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT);
5423 udelay(5);
5424 /* Make sure (redundant) we've released our request to stay awake */
5425 _il_clear_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
5426 /* Stop the device, and put it in low power state */
5427 _il_apm_stop(il);
5428
5429 spin_unlock_irq(&il->reg_lock);
5430
5431 il4965_txq_ctx_unmap(il);
5432exit:
5433 memset(&il->card_alive, 0, sizeof(struct il_alive_resp));
5434
5435 dev_kfree_skb(il->beacon_skb);
5436 il->beacon_skb = NULL;
5437
5438 /* clear out any free frames */
5439 il4965_clear_free_frames(il);
5440}
5441
5442static void
5443il4965_down(struct il_priv *il)
5444{
5445 mutex_lock(&il->mutex);
5446 __il4965_down(il);
5447 mutex_unlock(&il->mutex);
5448
5449 il4965_cancel_deferred_work(il);
5450}
5451
5452
5453static void
5454il4965_set_hw_ready(struct il_priv *il)
5455{
5456 int ret;
5457
5458 il_set_bit(il, CSR_HW_IF_CONFIG_REG,
5459 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY);
5460
5461 /* See if we got it */
5462 ret = _il_poll_bit(il, CSR_HW_IF_CONFIG_REG,
5463 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
5464 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
5465 100);
5466 if (ret >= 0)
5467 il->hw_ready = true;
5468
5469 D_INFO("hardware %s ready\n", (il->hw_ready) ? "" : "not");
5470}
5471
5472static void
5473il4965_prepare_card_hw(struct il_priv *il)
5474{
5475 int ret;
5476
5477 il->hw_ready = false;
5478
5479 il4965_set_hw_ready(il);
5480 if (il->hw_ready)
5481 return;
5482
5483 /* If HW is not ready, prepare the conditions to check again */
5484 il_set_bit(il, CSR_HW_IF_CONFIG_REG, CSR_HW_IF_CONFIG_REG_PREPARE);
5485
5486 ret =
5487 _il_poll_bit(il, CSR_HW_IF_CONFIG_REG,
5488 ~CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE,
5489 CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE, 150000);
5490
5491 /* HW should be ready by now, check again. */
5492 if (ret != -ETIMEDOUT)
5493 il4965_set_hw_ready(il);
5494}
5495
5496#define MAX_HW_RESTARTS 5
5497
5498static int
5499__il4965_up(struct il_priv *il)
5500{
5501 int i;
5502 int ret;
5503
5504 if (test_bit(S_EXIT_PENDING, &il->status)) {
5505 IL_WARN("Exit pending; will not bring the NIC up\n");
5506 return -EIO;
5507 }
5508
5509 if (!il->ucode_data_backup.v_addr || !il->ucode_data.v_addr) {
5510 IL_ERR("ucode not available for device bringup\n");
5511 return -EIO;
5512 }
5513
5514 ret = il4965_alloc_bcast_station(il);
5515 if (ret) {
5516 il_dealloc_bcast_stations(il);
5517 return ret;
5518 }
5519
5520 il4965_prepare_card_hw(il);
5521 if (!il->hw_ready) {
5522 il_dealloc_bcast_stations(il);
5523 IL_ERR("HW not ready\n");
5524 return -EIO;
5525 }
5526
5527 /* If platform's RF_KILL switch is NOT set to KILL */
5528 if (_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
5529 clear_bit(S_RFKILL, &il->status);
5530 else {
5531 set_bit(S_RFKILL, &il->status);
5532 wiphy_rfkill_set_hw_state(il->hw->wiphy, true);
5533
5534 il_dealloc_bcast_stations(il);
5535 il_enable_rfkill_int(il);
5536 IL_WARN("Radio disabled by HW RF Kill switch\n");
5537 return 0;
5538 }
5539
5540 _il_wr(il, CSR_INT, 0xFFFFFFFF);
5541
5542 /* must be initialised before il_hw_nic_init */
5543 il->cmd_queue = IL_DEFAULT_CMD_QUEUE_NUM;
5544
5545 ret = il4965_hw_nic_init(il);
5546 if (ret) {
5547 IL_ERR("Unable to init nic\n");
5548 il_dealloc_bcast_stations(il);
5549 return ret;
5550 }
5551
5552 /* make sure rfkill handshake bits are cleared */
5553 _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5554 _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
5555
5556 /* clear (again), then enable host interrupts */
5557 _il_wr(il, CSR_INT, 0xFFFFFFFF);
5558 il_enable_interrupts(il);
5559
5560 /* really make sure rfkill handshake bits are cleared */
5561 _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5562 _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5563
5564 /* Copy original ucode data image from disk into backup cache.
5565 * This will be used to initialize the on-board processor's
5566 * data SRAM for a clean start when the runtime program first loads. */
5567 memcpy(il->ucode_data_backup.v_addr, il->ucode_data.v_addr,
5568 il->ucode_data.len);
5569
5570 for (i = 0; i < MAX_HW_RESTARTS; i++) {
5571
5572 /* load bootstrap state machine,
5573 * load bootstrap program into processor's memory,
5574 * prepare to load the "initialize" uCode */
5575 ret = il->ops->load_ucode(il);
5576
5577 if (ret) {
5578 IL_ERR("Unable to set up bootstrap uCode: %d\n", ret);
5579 continue;
5580 }
5581
5582 /* start card; "initialize" will load runtime ucode */
5583 il4965_nic_start(il);
5584
5585 D_INFO(DRV_NAME " is coming up\n");
5586
5587 return 0;
5588 }
5589
5590 set_bit(S_EXIT_PENDING, &il->status);
5591 __il4965_down(il);
5592 clear_bit(S_EXIT_PENDING, &il->status);
5593
5594 /* tried to restart and config the device for as long as our
5595 * patience could withstand */
5596 IL_ERR("Unable to initialize device after %d attempts.\n", i);
5597 return -EIO;
5598}
5599
5600/*****************************************************************************
5601 *
5602 * Workqueue callbacks
5603 *
5604 *****************************************************************************/
5605
5606static void
5607il4965_bg_init_alive_start(struct work_struct *data)
5608{
5609 struct il_priv *il =
5610 container_of(data, struct il_priv, init_alive_start.work);
5611
5612 mutex_lock(&il->mutex);
5613 if (test_bit(S_EXIT_PENDING, &il->status))
5614 goto out;
5615
5616 il->ops->init_alive_start(il);
5617out:
5618 mutex_unlock(&il->mutex);
5619}
5620
5621static void
5622il4965_bg_alive_start(struct work_struct *data)
5623{
5624 struct il_priv *il =
5625 container_of(data, struct il_priv, alive_start.work);
5626
5627 mutex_lock(&il->mutex);
5628 if (test_bit(S_EXIT_PENDING, &il->status))
5629 goto out;
5630
5631 il4965_alive_start(il);
5632out:
5633 mutex_unlock(&il->mutex);
5634}
5635
5636static void
5637il4965_bg_run_time_calib_work(struct work_struct *work)
5638{
5639 struct il_priv *il = container_of(work, struct il_priv,
5640 run_time_calib_work);
5641
5642 mutex_lock(&il->mutex);
5643
5644 if (test_bit(S_EXIT_PENDING, &il->status) ||
5645 test_bit(S_SCANNING, &il->status)) {
5646 mutex_unlock(&il->mutex);
5647 return;
5648 }
5649
5650 if (il->start_calib) {
5651 il4965_chain_noise_calibration(il, (void *)&il->_4965.stats);
5652 il4965_sensitivity_calibration(il, (void *)&il->_4965.stats);
5653 }
5654
5655 mutex_unlock(&il->mutex);
5656}
5657
5658static void
5659il4965_bg_restart(struct work_struct *data)
5660{
5661 struct il_priv *il = container_of(data, struct il_priv, restart);
5662
5663 if (test_bit(S_EXIT_PENDING, &il->status))
5664 return;
5665
5666 if (test_and_clear_bit(S_FW_ERROR, &il->status)) {
5667 mutex_lock(&il->mutex);
5668 il->is_open = 0;
5669
5670 __il4965_down(il);
5671
5672 mutex_unlock(&il->mutex);
5673 il4965_cancel_deferred_work(il);
5674 ieee80211_restart_hw(il->hw);
5675 } else {
5676 il4965_down(il);
5677
5678 mutex_lock(&il->mutex);
5679 if (test_bit(S_EXIT_PENDING, &il->status)) {
5680 mutex_unlock(&il->mutex);
5681 return;
5682 }
5683
5684 __il4965_up(il);
5685 mutex_unlock(&il->mutex);
5686 }
5687}
5688
5689static void
5690il4965_bg_rx_replenish(struct work_struct *data)
5691{
5692 struct il_priv *il = container_of(data, struct il_priv, rx_replenish);
5693
5694 if (test_bit(S_EXIT_PENDING, &il->status))
5695 return;
5696
5697 mutex_lock(&il->mutex);
5698 il4965_rx_replenish(il);
5699 mutex_unlock(&il->mutex);
5700}
5701
5702/*****************************************************************************
5703 *
5704 * mac80211 entry point functions
5705 *
5706 *****************************************************************************/
5707
5708#define UCODE_READY_TIMEOUT (4 * HZ)
5709
5710/*
5711 * Not a mac80211 entry point function, but it fits in with all the
5712 * other mac80211 functions grouped here.
5713 */
5714static int
5715il4965_mac_setup_register(struct il_priv *il, u32 max_probe_length)
5716{
5717 int ret;
5718 struct ieee80211_hw *hw = il->hw;
5719
5720 hw->rate_control_algorithm = "iwl-4965-rs";
5721
5722 /* Tell mac80211 our characteristics */
5723 ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS);
5724 ieee80211_hw_set(hw, SUPPORTS_PS);
5725 ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS);
5726 ieee80211_hw_set(hw, SPECTRUM_MGMT);
5727 ieee80211_hw_set(hw, NEED_DTIM_BEFORE_ASSOC);
5728 ieee80211_hw_set(hw, SIGNAL_DBM);
5729 ieee80211_hw_set(hw, AMPDU_AGGREGATION);
5730 if (il->cfg->sku & IL_SKU_N)
5731 hw->wiphy->features |= NL80211_FEATURE_DYNAMIC_SMPS |
5732 NL80211_FEATURE_STATIC_SMPS;
5733
5734 hw->sta_data_size = sizeof(struct il_station_priv);
5735 hw->vif_data_size = sizeof(struct il_vif_priv);
5736
5737 hw->wiphy->interface_modes =
5738 BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_ADHOC);
5739
5740 hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
5741 hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
5742 REGULATORY_DISABLE_BEACON_HINTS;
5743
5744 /*
5745 * For now, disable PS by default because it affects
5746 * RX performance significantly.
5747 */
5748 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
5749
5750 hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
5751 /* we create the 802.11 header and a zero-length SSID element */
5752 hw->wiphy->max_scan_ie_len = max_probe_length - 24 - 2;
5753
5754 /* Default value; 4 EDCA QOS priorities */
5755 hw->queues = 4;
5756
5757 hw->max_listen_interval = IL_CONN_MAX_LISTEN_INTERVAL;
5758
5759 if (il->bands[NL80211_BAND_2GHZ].n_channels)
5760 il->hw->wiphy->bands[NL80211_BAND_2GHZ] =
5761 &il->bands[NL80211_BAND_2GHZ];
5762 if (il->bands[NL80211_BAND_5GHZ].n_channels)
5763 il->hw->wiphy->bands[NL80211_BAND_5GHZ] =
5764 &il->bands[NL80211_BAND_5GHZ];
5765
5766 il_leds_init(il);
5767
5768 wiphy_ext_feature_set(il->hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
5769
5770 ret = ieee80211_register_hw(il->hw);
5771 if (ret) {
5772 IL_ERR("Failed to register hw (error %d)\n", ret);
5773 return ret;
5774 }
5775 il->mac80211_registered = 1;
5776
5777 return 0;
5778}
5779
5780int
5781il4965_mac_start(struct ieee80211_hw *hw)
5782{
5783 struct il_priv *il = hw->priv;
5784 int ret;
5785
5786 D_MAC80211("enter\n");
5787
5788 /* we should be verifying the device is ready to be opened */
5789 mutex_lock(&il->mutex);
5790 ret = __il4965_up(il);
5791 mutex_unlock(&il->mutex);
5792
5793 if (ret)
5794 return ret;
5795
5796 if (il_is_rfkill(il))
5797 goto out;
5798
5799 D_INFO("Start UP work done.\n");
5800
5801 /* Wait for START_ALIVE from Run Time ucode. Otherwise callbacks from
5802 * mac80211 will not be run successfully. */
5803 ret = wait_event_timeout(il->wait_command_queue,
5804 test_bit(S_READY, &il->status),
5805 UCODE_READY_TIMEOUT);
5806 if (!ret) {
5807 if (!test_bit(S_READY, &il->status)) {
5808 IL_ERR("START_ALIVE timeout after %dms.\n",
5809 jiffies_to_msecs(UCODE_READY_TIMEOUT));
5810 return -ETIMEDOUT;
5811 }
5812 }
5813
5814 il4965_led_enable(il);
5815
5816out:
5817 il->is_open = 1;
5818 D_MAC80211("leave\n");
5819 return 0;
5820}
5821
5822void
5823il4965_mac_stop(struct ieee80211_hw *hw)
5824{
5825 struct il_priv *il = hw->priv;
5826
5827 D_MAC80211("enter\n");
5828
5829 if (!il->is_open)
5830 return;
5831
5832 il->is_open = 0;
5833
5834 il4965_down(il);
5835
5836 flush_workqueue(il->workqueue);
5837
5838 /* User space software may expect getting rfkill changes
5839 * even if interface is down */
5840 _il_wr(il, CSR_INT, 0xFFFFFFFF);
5841 il_enable_rfkill_int(il);
5842
5843 D_MAC80211("leave\n");
5844}
5845
5846void
5847il4965_mac_tx(struct ieee80211_hw *hw,
5848 struct ieee80211_tx_control *control,
5849 struct sk_buff *skb)
5850{
5851 struct il_priv *il = hw->priv;
5852
5853 D_MACDUMP("enter\n");
5854
5855 D_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
5856 ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
5857
5858 if (il4965_tx_skb(il, control->sta, skb))
5859 dev_kfree_skb_any(skb);
5860
5861 D_MACDUMP("leave\n");
5862}
5863
5864void
5865il4965_mac_update_tkip_key(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5866 struct ieee80211_key_conf *keyconf,
5867 struct ieee80211_sta *sta, u32 iv32, u16 * phase1key)
5868{
5869 struct il_priv *il = hw->priv;
5870
5871 D_MAC80211("enter\n");
5872
5873 il4965_update_tkip_key(il, keyconf, sta, iv32, phase1key);
5874
5875 D_MAC80211("leave\n");
5876}
5877
5878int
5879il4965_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
5880 struct ieee80211_vif *vif, struct ieee80211_sta *sta,
5881 struct ieee80211_key_conf *key)
5882{
5883 struct il_priv *il = hw->priv;
5884 int ret;
5885 u8 sta_id;
5886 bool is_default_wep_key = false;
5887
5888 D_MAC80211("enter\n");
5889
5890 if (il->cfg->mod_params->sw_crypto) {
5891 D_MAC80211("leave - hwcrypto disabled\n");
5892 return -EOPNOTSUPP;
5893 }
5894
5895 /*
5896 * To support IBSS RSN, don't program group keys in IBSS, the
5897 * hardware will then not attempt to decrypt the frames.
5898 */
5899 if (vif->type == NL80211_IFTYPE_ADHOC &&
5900 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
5901 D_MAC80211("leave - ad-hoc group key\n");
5902 return -EOPNOTSUPP;
5903 }
5904
5905 sta_id = il_sta_id_or_broadcast(il, sta);
5906 if (sta_id == IL_INVALID_STATION)
5907 return -EINVAL;
5908
5909 mutex_lock(&il->mutex);
5910 il_scan_cancel_timeout(il, 100);
5911
5912 /*
5913 * If we are getting WEP group key and we didn't receive any key mapping
5914 * so far, we are in legacy wep mode (group key only), otherwise we are
5915 * in 1X mode.
5916 * In legacy wep mode, we use another host command to the uCode.
5917 */
5918 if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
5919 key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) {
5920 if (cmd == SET_KEY)
5921 is_default_wep_key = !il->_4965.key_mapping_keys;
5922 else
5923 is_default_wep_key =
5924 (key->hw_key_idx == HW_KEY_DEFAULT);
5925 }
5926
5927 switch (cmd) {
5928 case SET_KEY:
5929 if (is_default_wep_key)
5930 ret = il4965_set_default_wep_key(il, key);
5931 else
5932 ret = il4965_set_dynamic_key(il, key, sta_id);
5933
5934 D_MAC80211("enable hwcrypto key\n");
5935 break;
5936 case DISABLE_KEY:
5937 if (is_default_wep_key)
5938 ret = il4965_remove_default_wep_key(il, key);
5939 else
5940 ret = il4965_remove_dynamic_key(il, key, sta_id);
5941
5942 D_MAC80211("disable hwcrypto key\n");
5943 break;
5944 default:
5945 ret = -EINVAL;
5946 }
5947
5948 mutex_unlock(&il->mutex);
5949 D_MAC80211("leave\n");
5950
5951 return ret;
5952}
5953
5954int
5955il4965_mac_ampdu_action(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5956 struct ieee80211_ampdu_params *params)
5957{
5958 struct il_priv *il = hw->priv;
5959 int ret = -EINVAL;
5960 struct ieee80211_sta *sta = params->sta;
5961 enum ieee80211_ampdu_mlme_action action = params->action;
5962 u16 tid = params->tid;
5963 u16 *ssn = ¶ms->ssn;
5964
5965 D_HT("A-MPDU action on addr %pM tid %d\n", sta->addr, tid);
5966
5967 if (!(il->cfg->sku & IL_SKU_N))
5968 return -EACCES;
5969
5970 mutex_lock(&il->mutex);
5971
5972 switch (action) {
5973 case IEEE80211_AMPDU_RX_START:
5974 D_HT("start Rx\n");
5975 ret = il4965_sta_rx_agg_start(il, sta, tid, *ssn);
5976 break;
5977 case IEEE80211_AMPDU_RX_STOP:
5978 D_HT("stop Rx\n");
5979 ret = il4965_sta_rx_agg_stop(il, sta, tid);
5980 if (test_bit(S_EXIT_PENDING, &il->status))
5981 ret = 0;
5982 break;
5983 case IEEE80211_AMPDU_TX_START:
5984 D_HT("start Tx\n");
5985 ret = il4965_tx_agg_start(il, vif, sta, tid, ssn);
5986 break;
5987 case IEEE80211_AMPDU_TX_STOP_CONT:
5988 case IEEE80211_AMPDU_TX_STOP_FLUSH:
5989 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
5990 D_HT("stop Tx\n");
5991 ret = il4965_tx_agg_stop(il, vif, sta, tid);
5992 if (test_bit(S_EXIT_PENDING, &il->status))
5993 ret = 0;
5994 break;
5995 case IEEE80211_AMPDU_TX_OPERATIONAL:
5996 ret = 0;
5997 break;
5998 }
5999 mutex_unlock(&il->mutex);
6000
6001 return ret;
6002}
6003
6004int
6005il4965_mac_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
6006 struct ieee80211_sta *sta)
6007{
6008 struct il_priv *il = hw->priv;
6009 struct il_station_priv *sta_priv = (void *)sta->drv_priv;
6010 bool is_ap = vif->type == NL80211_IFTYPE_STATION;
6011 int ret;
6012 u8 sta_id;
6013
6014 D_INFO("received request to add station %pM\n", sta->addr);
6015 mutex_lock(&il->mutex);
6016 D_INFO("proceeding to add station %pM\n", sta->addr);
6017 sta_priv->common.sta_id = IL_INVALID_STATION;
6018
6019 atomic_set(&sta_priv->pending_frames, 0);
6020
6021 ret =
6022 il_add_station_common(il, sta->addr, is_ap, sta, &sta_id);
6023 if (ret) {
6024 IL_ERR("Unable to add station %pM (%d)\n", sta->addr, ret);
6025 /* Should we return success if return code is EEXIST ? */
6026 mutex_unlock(&il->mutex);
6027 return ret;
6028 }
6029
6030 sta_priv->common.sta_id = sta_id;
6031
6032 /* Initialize rate scaling */
6033 D_INFO("Initializing rate scaling for station %pM\n", sta->addr);
6034 il4965_rs_rate_init(il, sta, sta_id);
6035 mutex_unlock(&il->mutex);
6036
6037 return 0;
6038}
6039
6040void
6041il4965_mac_channel_switch(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
6042 struct ieee80211_channel_switch *ch_switch)
6043{
6044 struct il_priv *il = hw->priv;
6045 const struct il_channel_info *ch_info;
6046 struct ieee80211_conf *conf = &hw->conf;
6047 struct ieee80211_channel *channel = ch_switch->chandef.chan;
6048 struct il_ht_config *ht_conf = &il->current_ht_config;
6049 u16 ch;
6050
6051 D_MAC80211("enter\n");
6052
6053 mutex_lock(&il->mutex);
6054
6055 if (il_is_rfkill(il))
6056 goto out;
6057
6058 if (test_bit(S_EXIT_PENDING, &il->status) ||
6059 test_bit(S_SCANNING, &il->status) ||
6060 test_bit(S_CHANNEL_SWITCH_PENDING, &il->status))
6061 goto out;
6062
6063 if (!il_is_associated(il))
6064 goto out;
6065
6066 if (!il->ops->set_channel_switch)
6067 goto out;
6068
6069 ch = channel->hw_value;
6070 if (le16_to_cpu(il->active.channel) == ch)
6071 goto out;
6072
6073 ch_info = il_get_channel_info(il, channel->band, ch);
6074 if (!il_is_channel_valid(ch_info)) {
6075 D_MAC80211("invalid channel\n");
6076 goto out;
6077 }
6078
6079 spin_lock_irq(&il->lock);
6080
6081 il->current_ht_config.smps = conf->smps_mode;
6082
6083 /* Configure HT40 channels */
6084 switch (cfg80211_get_chandef_type(&ch_switch->chandef)) {
6085 case NL80211_CHAN_NO_HT:
6086 case NL80211_CHAN_HT20:
6087 il->ht.is_40mhz = false;
6088 il->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
6089 break;
6090 case NL80211_CHAN_HT40MINUS:
6091 il->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
6092 il->ht.is_40mhz = true;
6093 break;
6094 case NL80211_CHAN_HT40PLUS:
6095 il->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
6096 il->ht.is_40mhz = true;
6097 break;
6098 }
6099
6100 if ((le16_to_cpu(il->staging.channel) != ch))
6101 il->staging.flags = 0;
6102
6103 il_set_rxon_channel(il, channel);
6104 il_set_rxon_ht(il, ht_conf);
6105 il_set_flags_for_band(il, channel->band, il->vif);
6106
6107 spin_unlock_irq(&il->lock);
6108
6109 il_set_rate(il);
6110 /*
6111 * at this point, staging_rxon has the
6112 * configuration for channel switch
6113 */
6114 set_bit(S_CHANNEL_SWITCH_PENDING, &il->status);
6115 il->switch_channel = cpu_to_le16(ch);
6116 if (il->ops->set_channel_switch(il, ch_switch)) {
6117 clear_bit(S_CHANNEL_SWITCH_PENDING, &il->status);
6118 il->switch_channel = 0;
6119 ieee80211_chswitch_done(il->vif, false, 0);
6120 }
6121
6122out:
6123 mutex_unlock(&il->mutex);
6124 D_MAC80211("leave\n");
6125}
6126
6127void
6128il4965_configure_filter(struct ieee80211_hw *hw, unsigned int changed_flags,
6129 unsigned int *total_flags, u64 multicast)
6130{
6131 struct il_priv *il = hw->priv;
6132 __le32 filter_or = 0, filter_nand = 0;
6133
6134#define CHK(test, flag) do { \
6135 if (*total_flags & (test)) \
6136 filter_or |= (flag); \
6137 else \
6138 filter_nand |= (flag); \
6139 } while (0)
6140
6141 D_MAC80211("Enter: changed: 0x%x, total: 0x%x\n", changed_flags,
6142 *total_flags);
6143
6144 CHK(FIF_OTHER_BSS, RXON_FILTER_PROMISC_MSK);
6145 /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
6146 CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
6147 CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
6148
6149#undef CHK
6150
6151 mutex_lock(&il->mutex);
6152
6153 il->staging.filter_flags &= ~filter_nand;
6154 il->staging.filter_flags |= filter_or;
6155
6156 /*
6157 * Not committing directly because hardware can perform a scan,
6158 * but we'll eventually commit the filter flags change anyway.
6159 */
6160
6161 mutex_unlock(&il->mutex);
6162
6163 /*
6164 * Receiving all multicast frames is always enabled by the
6165 * default flags setup in il_connection_init_rx_config()
6166 * since we currently do not support programming multicast
6167 * filters into the device.
6168 */
6169 *total_flags &=
6170 FIF_OTHER_BSS | FIF_ALLMULTI |
6171 FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
6172}
6173
6174/*****************************************************************************
6175 *
6176 * driver setup and teardown
6177 *
6178 *****************************************************************************/
6179
6180static void
6181il4965_bg_txpower_work(struct work_struct *work)
6182{
6183 struct il_priv *il = container_of(work, struct il_priv,
6184 txpower_work);
6185
6186 mutex_lock(&il->mutex);
6187
6188 /* If a scan happened to start before we got here
6189 * then just return; the stats notification will
6190 * kick off another scheduled work to compensate for
6191 * any temperature delta we missed here. */
6192 if (test_bit(S_EXIT_PENDING, &il->status) ||
6193 test_bit(S_SCANNING, &il->status))
6194 goto out;
6195
6196 /* Regardless of if we are associated, we must reconfigure the
6197 * TX power since frames can be sent on non-radar channels while
6198 * not associated */
6199 il->ops->send_tx_power(il);
6200
6201 /* Update last_temperature to keep is_calib_needed from running
6202 * when it isn't needed... */
6203 il->last_temperature = il->temperature;
6204out:
6205 mutex_unlock(&il->mutex);
6206}
6207
6208static int
6209il4965_setup_deferred_work(struct il_priv *il)
6210{
6211 il->workqueue = create_singlethread_workqueue(DRV_NAME);
6212 if (!il->workqueue)
6213 return -ENOMEM;
6214
6215 init_waitqueue_head(&il->wait_command_queue);
6216
6217 INIT_WORK(&il->restart, il4965_bg_restart);
6218 INIT_WORK(&il->rx_replenish, il4965_bg_rx_replenish);
6219 INIT_WORK(&il->run_time_calib_work, il4965_bg_run_time_calib_work);
6220 INIT_DELAYED_WORK(&il->init_alive_start, il4965_bg_init_alive_start);
6221 INIT_DELAYED_WORK(&il->alive_start, il4965_bg_alive_start);
6222
6223 il_setup_scan_deferred_work(il);
6224
6225 INIT_WORK(&il->txpower_work, il4965_bg_txpower_work);
6226
6227 timer_setup(&il->stats_periodic, il4965_bg_stats_periodic, 0);
6228
6229 timer_setup(&il->watchdog, il_bg_watchdog, 0);
6230
6231 tasklet_setup(&il->irq_tasklet, il4965_irq_tasklet);
6232
6233 return 0;
6234}
6235
6236static void
6237il4965_cancel_deferred_work(struct il_priv *il)
6238{
6239 cancel_work_sync(&il->txpower_work);
6240 cancel_delayed_work_sync(&il->init_alive_start);
6241 cancel_delayed_work(&il->alive_start);
6242 cancel_work_sync(&il->run_time_calib_work);
6243
6244 il_cancel_scan_deferred_work(il);
6245
6246 del_timer_sync(&il->stats_periodic);
6247}
6248
6249static void
6250il4965_init_hw_rates(struct il_priv *il, struct ieee80211_rate *rates)
6251{
6252 int i;
6253
6254 for (i = 0; i < RATE_COUNT_LEGACY; i++) {
6255 rates[i].bitrate = il_rates[i].ieee * 5;
6256 rates[i].hw_value = i; /* Rate scaling will work on idxes */
6257 rates[i].hw_value_short = i;
6258 rates[i].flags = 0;
6259 if ((i >= IL_FIRST_CCK_RATE) && (i <= IL_LAST_CCK_RATE)) {
6260 /*
6261 * If CCK != 1M then set short preamble rate flag.
6262 */
6263 rates[i].flags |=
6264 (il_rates[i].plcp ==
6265 RATE_1M_PLCP) ? 0 : IEEE80211_RATE_SHORT_PREAMBLE;
6266 }
6267 }
6268}
6269
6270/*
6271 * Acquire il->lock before calling this function !
6272 */
6273void
6274il4965_set_wr_ptrs(struct il_priv *il, int txq_id, u32 idx)
6275{
6276 il_wr(il, HBUS_TARG_WRPTR, (idx & 0xff) | (txq_id << 8));
6277 il_wr_prph(il, IL49_SCD_QUEUE_RDPTR(txq_id), idx);
6278}
6279
6280void
6281il4965_tx_queue_set_status(struct il_priv *il, struct il_tx_queue *txq,
6282 int tx_fifo_id, int scd_retry)
6283{
6284 int txq_id = txq->q.id;
6285
6286 /* Find out whether to activate Tx queue */
6287 int active = test_bit(txq_id, &il->txq_ctx_active_msk) ? 1 : 0;
6288
6289 /* Set up and activate */
6290 il_wr_prph(il, IL49_SCD_QUEUE_STATUS_BITS(txq_id),
6291 (active << IL49_SCD_QUEUE_STTS_REG_POS_ACTIVE) |
6292 (tx_fifo_id << IL49_SCD_QUEUE_STTS_REG_POS_TXF) |
6293 (scd_retry << IL49_SCD_QUEUE_STTS_REG_POS_WSL) |
6294 (scd_retry << IL49_SCD_QUEUE_STTS_REG_POS_SCD_ACK) |
6295 IL49_SCD_QUEUE_STTS_REG_MSK);
6296
6297 txq->sched_retry = scd_retry;
6298
6299 D_INFO("%s %s Queue %d on AC %d\n", active ? "Activate" : "Deactivate",
6300 scd_retry ? "BA" : "AC", txq_id, tx_fifo_id);
6301}
6302
6303static const struct ieee80211_ops il4965_mac_ops = {
6304 .tx = il4965_mac_tx,
6305 .wake_tx_queue = ieee80211_handle_wake_tx_queue,
6306 .start = il4965_mac_start,
6307 .stop = il4965_mac_stop,
6308 .add_interface = il_mac_add_interface,
6309 .remove_interface = il_mac_remove_interface,
6310 .change_interface = il_mac_change_interface,
6311 .config = il_mac_config,
6312 .configure_filter = il4965_configure_filter,
6313 .set_key = il4965_mac_set_key,
6314 .update_tkip_key = il4965_mac_update_tkip_key,
6315 .conf_tx = il_mac_conf_tx,
6316 .reset_tsf = il_mac_reset_tsf,
6317 .bss_info_changed = il_mac_bss_info_changed,
6318 .ampdu_action = il4965_mac_ampdu_action,
6319 .hw_scan = il_mac_hw_scan,
6320 .sta_add = il4965_mac_sta_add,
6321 .sta_remove = il_mac_sta_remove,
6322 .channel_switch = il4965_mac_channel_switch,
6323 .tx_last_beacon = il_mac_tx_last_beacon,
6324 .flush = il_mac_flush,
6325};
6326
6327static int
6328il4965_init_drv(struct il_priv *il)
6329{
6330 int ret;
6331
6332 spin_lock_init(&il->sta_lock);
6333 spin_lock_init(&il->hcmd_lock);
6334
6335 INIT_LIST_HEAD(&il->free_frames);
6336
6337 mutex_init(&il->mutex);
6338
6339 il->ieee_channels = NULL;
6340 il->ieee_rates = NULL;
6341 il->band = NL80211_BAND_2GHZ;
6342
6343 il->iw_mode = NL80211_IFTYPE_STATION;
6344 il->current_ht_config.smps = IEEE80211_SMPS_STATIC;
6345 il->missed_beacon_threshold = IL_MISSED_BEACON_THRESHOLD_DEF;
6346
6347 /* initialize force reset */
6348 il->force_reset.reset_duration = IL_DELAY_NEXT_FORCE_FW_RELOAD;
6349
6350 /* Choose which receivers/antennas to use */
6351 if (il->ops->set_rxon_chain)
6352 il->ops->set_rxon_chain(il);
6353
6354 il_init_scan_params(il);
6355
6356 ret = il_init_channel_map(il);
6357 if (ret) {
6358 IL_ERR("initializing regulatory failed: %d\n", ret);
6359 goto err;
6360 }
6361
6362 ret = il_init_geos(il);
6363 if (ret) {
6364 IL_ERR("initializing geos failed: %d\n", ret);
6365 goto err_free_channel_map;
6366 }
6367 il4965_init_hw_rates(il, il->ieee_rates);
6368
6369 return 0;
6370
6371err_free_channel_map:
6372 il_free_channel_map(il);
6373err:
6374 return ret;
6375}
6376
6377static void
6378il4965_uninit_drv(struct il_priv *il)
6379{
6380 il_free_geos(il);
6381 il_free_channel_map(il);
6382 kfree(il->scan_cmd);
6383}
6384
6385static void
6386il4965_hw_detect(struct il_priv *il)
6387{
6388 il->hw_rev = _il_rd(il, CSR_HW_REV);
6389 il->hw_wa_rev = _il_rd(il, CSR_HW_REV_WA_REG);
6390 il->rev_id = il->pci_dev->revision;
6391 D_INFO("HW Revision ID = 0x%X\n", il->rev_id);
6392}
6393
6394static const struct il_sensitivity_ranges il4965_sensitivity = {
6395 .min_nrg_cck = 97,
6396 .max_nrg_cck = 0, /* not used, set to 0 */
6397
6398 .auto_corr_min_ofdm = 85,
6399 .auto_corr_min_ofdm_mrc = 170,
6400 .auto_corr_min_ofdm_x1 = 105,
6401 .auto_corr_min_ofdm_mrc_x1 = 220,
6402
6403 .auto_corr_max_ofdm = 120,
6404 .auto_corr_max_ofdm_mrc = 210,
6405 .auto_corr_max_ofdm_x1 = 140,
6406 .auto_corr_max_ofdm_mrc_x1 = 270,
6407
6408 .auto_corr_min_cck = 125,
6409 .auto_corr_max_cck = 200,
6410 .auto_corr_min_cck_mrc = 200,
6411 .auto_corr_max_cck_mrc = 400,
6412
6413 .nrg_th_cck = 100,
6414 .nrg_th_ofdm = 100,
6415
6416 .barker_corr_th_min = 190,
6417 .barker_corr_th_min_mrc = 390,
6418 .nrg_th_cca = 62,
6419};
6420
6421static void
6422il4965_set_hw_params(struct il_priv *il)
6423{
6424 il->hw_params.bcast_id = IL4965_BROADCAST_ID;
6425 il->hw_params.max_rxq_size = RX_QUEUE_SIZE;
6426 il->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
6427 if (il->cfg->mod_params->amsdu_size_8K)
6428 il->hw_params.rx_page_order = get_order(IL_RX_BUF_SIZE_8K);
6429 else
6430 il->hw_params.rx_page_order = get_order(IL_RX_BUF_SIZE_4K);
6431
6432 il->hw_params.max_beacon_itrvl = IL_MAX_UCODE_BEACON_INTERVAL;
6433
6434 if (il->cfg->mod_params->disable_11n)
6435 il->cfg->sku &= ~IL_SKU_N;
6436
6437 if (il->cfg->mod_params->num_of_queues >= IL_MIN_NUM_QUEUES &&
6438 il->cfg->mod_params->num_of_queues <= IL49_NUM_QUEUES)
6439 il->cfg->num_of_queues =
6440 il->cfg->mod_params->num_of_queues;
6441
6442 il->hw_params.max_txq_num = il->cfg->num_of_queues;
6443 il->hw_params.dma_chnl_num = FH49_TCSR_CHNL_NUM;
6444 il->hw_params.scd_bc_tbls_size =
6445 il->cfg->num_of_queues *
6446 sizeof(struct il4965_scd_bc_tbl);
6447
6448 il->hw_params.tfd_size = sizeof(struct il_tfd);
6449 il->hw_params.max_stations = IL4965_STATION_COUNT;
6450 il->hw_params.max_data_size = IL49_RTC_DATA_SIZE;
6451 il->hw_params.max_inst_size = IL49_RTC_INST_SIZE;
6452 il->hw_params.max_bsm_size = BSM_SRAM_SIZE;
6453 il->hw_params.ht40_channel = BIT(NL80211_BAND_5GHZ);
6454
6455 il->hw_params.rx_wrt_ptr_reg = FH49_RSCSR_CHNL0_WPTR;
6456
6457 il->hw_params.tx_chains_num = il4965_num_of_ant(il->cfg->valid_tx_ant);
6458 il->hw_params.rx_chains_num = il4965_num_of_ant(il->cfg->valid_rx_ant);
6459 il->hw_params.valid_tx_ant = il->cfg->valid_tx_ant;
6460 il->hw_params.valid_rx_ant = il->cfg->valid_rx_ant;
6461
6462 il->hw_params.ct_kill_threshold =
6463 celsius_to_kelvin(CT_KILL_THRESHOLD_LEGACY);
6464
6465 il->hw_params.sens = &il4965_sensitivity;
6466 il->hw_params.beacon_time_tsf_bits = IL4965_EXT_BEACON_TIME_POS;
6467}
6468
6469static int
6470il4965_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
6471{
6472 int err = 0;
6473 struct il_priv *il;
6474 struct ieee80211_hw *hw;
6475 struct il_cfg *cfg = (struct il_cfg *)(ent->driver_data);
6476 unsigned long flags;
6477 u16 pci_cmd;
6478
6479 /************************
6480 * 1. Allocating HW data
6481 ************************/
6482
6483 hw = ieee80211_alloc_hw(sizeof(struct il_priv), &il4965_mac_ops);
6484 if (!hw) {
6485 err = -ENOMEM;
6486 goto out;
6487 }
6488 il = hw->priv;
6489 il->hw = hw;
6490 SET_IEEE80211_DEV(hw, &pdev->dev);
6491
6492 D_INFO("*** LOAD DRIVER ***\n");
6493 il->cfg = cfg;
6494 il->ops = &il4965_ops;
6495#ifdef CONFIG_IWLEGACY_DEBUGFS
6496 il->debugfs_ops = &il4965_debugfs_ops;
6497#endif
6498 il->pci_dev = pdev;
6499 il->inta_mask = CSR_INI_SET_MASK;
6500
6501 /**************************
6502 * 2. Initializing PCI bus
6503 **************************/
6504 pci_disable_link_state(pdev,
6505 PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1 |
6506 PCIE_LINK_STATE_CLKPM);
6507
6508 if (pci_enable_device(pdev)) {
6509 err = -ENODEV;
6510 goto out_ieee80211_free_hw;
6511 }
6512
6513 pci_set_master(pdev);
6514
6515 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(36));
6516 if (err) {
6517 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
6518 /* both attempts failed: */
6519 if (err) {
6520 IL_WARN("No suitable DMA available.\n");
6521 goto out_pci_disable_device;
6522 }
6523 }
6524
6525 err = pci_request_regions(pdev, DRV_NAME);
6526 if (err)
6527 goto out_pci_disable_device;
6528
6529 pci_set_drvdata(pdev, il);
6530
6531 /***********************
6532 * 3. Read REV register
6533 ***********************/
6534 il->hw_base = pci_ioremap_bar(pdev, 0);
6535 if (!il->hw_base) {
6536 err = -ENODEV;
6537 goto out_pci_release_regions;
6538 }
6539
6540 D_INFO("pci_resource_len = 0x%08llx\n",
6541 (unsigned long long)pci_resource_len(pdev, 0));
6542 D_INFO("pci_resource_base = %p\n", il->hw_base);
6543
6544 /* these spin locks will be used in apm_ops.init and EEPROM access
6545 * we should init now
6546 */
6547 spin_lock_init(&il->reg_lock);
6548 spin_lock_init(&il->lock);
6549
6550 /*
6551 * stop and reset the on-board processor just in case it is in a
6552 * strange state ... like being left stranded by a primary kernel
6553 * and this is now the kdump kernel trying to start up
6554 */
6555 _il_wr(il, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
6556
6557 il4965_hw_detect(il);
6558 IL_INFO("Detected %s, REV=0x%X\n", il->cfg->name, il->hw_rev);
6559
6560 /* We disable the RETRY_TIMEOUT register (0x41) to keep
6561 * PCI Tx retries from interfering with C3 CPU state */
6562 pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
6563
6564 il4965_prepare_card_hw(il);
6565 if (!il->hw_ready) {
6566 IL_WARN("Failed, HW not ready\n");
6567 err = -EIO;
6568 goto out_iounmap;
6569 }
6570
6571 /*****************
6572 * 4. Read EEPROM
6573 *****************/
6574 /* Read the EEPROM */
6575 err = il_eeprom_init(il);
6576 if (err) {
6577 IL_ERR("Unable to init EEPROM\n");
6578 goto out_iounmap;
6579 }
6580 err = il4965_eeprom_check_version(il);
6581 if (err)
6582 goto out_free_eeprom;
6583
6584 /* extract MAC Address */
6585 il4965_eeprom_get_mac(il, il->addresses[0].addr);
6586 D_INFO("MAC address: %pM\n", il->addresses[0].addr);
6587 il->hw->wiphy->addresses = il->addresses;
6588 il->hw->wiphy->n_addresses = 1;
6589
6590 /************************
6591 * 5. Setup HW constants
6592 ************************/
6593 il4965_set_hw_params(il);
6594
6595 /*******************
6596 * 6. Setup il
6597 *******************/
6598
6599 err = il4965_init_drv(il);
6600 if (err)
6601 goto out_free_eeprom;
6602 /* At this point both hw and il are initialized. */
6603
6604 /********************
6605 * 7. Setup services
6606 ********************/
6607 spin_lock_irqsave(&il->lock, flags);
6608 il_disable_interrupts(il);
6609 spin_unlock_irqrestore(&il->lock, flags);
6610
6611 pci_enable_msi(il->pci_dev);
6612
6613 err = request_irq(il->pci_dev->irq, il_isr, IRQF_SHARED, DRV_NAME, il);
6614 if (err) {
6615 IL_ERR("Error allocating IRQ %d\n", il->pci_dev->irq);
6616 goto out_disable_msi;
6617 }
6618
6619 err = il4965_setup_deferred_work(il);
6620 if (err)
6621 goto out_free_irq;
6622
6623 il4965_setup_handlers(il);
6624
6625 /*********************************************
6626 * 8. Enable interrupts and read RFKILL state
6627 *********************************************/
6628
6629 /* enable rfkill interrupt: hw bug w/a */
6630 pci_read_config_word(il->pci_dev, PCI_COMMAND, &pci_cmd);
6631 if (pci_cmd & PCI_COMMAND_INTX_DISABLE) {
6632 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
6633 pci_write_config_word(il->pci_dev, PCI_COMMAND, pci_cmd);
6634 }
6635
6636 il_enable_rfkill_int(il);
6637
6638 /* If platform's RF_KILL switch is NOT set to KILL */
6639 if (_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
6640 clear_bit(S_RFKILL, &il->status);
6641 else
6642 set_bit(S_RFKILL, &il->status);
6643
6644 wiphy_rfkill_set_hw_state(il->hw->wiphy,
6645 test_bit(S_RFKILL, &il->status));
6646
6647 il_power_initialize(il);
6648
6649 init_completion(&il->_4965.firmware_loading_complete);
6650
6651 err = il4965_request_firmware(il, true);
6652 if (err)
6653 goto out_destroy_workqueue;
6654
6655 return 0;
6656
6657out_destroy_workqueue:
6658 destroy_workqueue(il->workqueue);
6659 il->workqueue = NULL;
6660out_free_irq:
6661 free_irq(il->pci_dev->irq, il);
6662out_disable_msi:
6663 pci_disable_msi(il->pci_dev);
6664 il4965_uninit_drv(il);
6665out_free_eeprom:
6666 il_eeprom_free(il);
6667out_iounmap:
6668 iounmap(il->hw_base);
6669out_pci_release_regions:
6670 pci_release_regions(pdev);
6671out_pci_disable_device:
6672 pci_disable_device(pdev);
6673out_ieee80211_free_hw:
6674 ieee80211_free_hw(il->hw);
6675out:
6676 return err;
6677}
6678
6679static void
6680il4965_pci_remove(struct pci_dev *pdev)
6681{
6682 struct il_priv *il = pci_get_drvdata(pdev);
6683 unsigned long flags;
6684
6685 if (!il)
6686 return;
6687
6688 wait_for_completion(&il->_4965.firmware_loading_complete);
6689
6690 D_INFO("*** UNLOAD DRIVER ***\n");
6691
6692 il_dbgfs_unregister(il);
6693 sysfs_remove_group(&pdev->dev.kobj, &il_attribute_group);
6694
6695 /* ieee80211_unregister_hw call wil cause il_mac_stop to
6696 * be called and il4965_down since we are removing the device
6697 * we need to set S_EXIT_PENDING bit.
6698 */
6699 set_bit(S_EXIT_PENDING, &il->status);
6700
6701 il_leds_exit(il);
6702
6703 if (il->mac80211_registered) {
6704 ieee80211_unregister_hw(il->hw);
6705 il->mac80211_registered = 0;
6706 } else {
6707 il4965_down(il);
6708 }
6709
6710 /*
6711 * Make sure device is reset to low power before unloading driver.
6712 * This may be redundant with il4965_down(), but there are paths to
6713 * run il4965_down() without calling apm_ops.stop(), and there are
6714 * paths to avoid running il4965_down() at all before leaving driver.
6715 * This (inexpensive) call *makes sure* device is reset.
6716 */
6717 il_apm_stop(il);
6718
6719 /* make sure we flush any pending irq or
6720 * tasklet for the driver
6721 */
6722 spin_lock_irqsave(&il->lock, flags);
6723 il_disable_interrupts(il);
6724 spin_unlock_irqrestore(&il->lock, flags);
6725
6726 il4965_synchronize_irq(il);
6727
6728 il4965_dealloc_ucode_pci(il);
6729
6730 if (il->rxq.bd)
6731 il4965_rx_queue_free(il, &il->rxq);
6732 il4965_hw_txq_ctx_free(il);
6733
6734 il_eeprom_free(il);
6735
6736 /*netif_stop_queue(dev); */
6737
6738 /* ieee80211_unregister_hw calls il_mac_stop, which flushes
6739 * il->workqueue... so we can't take down the workqueue
6740 * until now... */
6741 destroy_workqueue(il->workqueue);
6742 il->workqueue = NULL;
6743
6744 free_irq(il->pci_dev->irq, il);
6745 pci_disable_msi(il->pci_dev);
6746 iounmap(il->hw_base);
6747 pci_release_regions(pdev);
6748 pci_disable_device(pdev);
6749
6750 il4965_uninit_drv(il);
6751
6752 dev_kfree_skb(il->beacon_skb);
6753
6754 ieee80211_free_hw(il->hw);
6755}
6756
6757/*
6758 * Activate/Deactivate Tx DMA/FIFO channels according tx fifos mask
6759 * must be called under il->lock and mac access
6760 */
6761void
6762il4965_txq_set_sched(struct il_priv *il, u32 mask)
6763{
6764 il_wr_prph(il, IL49_SCD_TXFACT, mask);
6765}
6766
6767/*****************************************************************************
6768 *
6769 * driver and module entry point
6770 *
6771 *****************************************************************************/
6772
6773/* Hardware specific file defines the PCI IDs table for that hardware module */
6774static const struct pci_device_id il4965_hw_card_ids[] = {
6775 {IL_PCI_DEVICE(0x4229, PCI_ANY_ID, il4965_cfg)},
6776 {IL_PCI_DEVICE(0x4230, PCI_ANY_ID, il4965_cfg)},
6777 {0}
6778};
6779MODULE_DEVICE_TABLE(pci, il4965_hw_card_ids);
6780
6781static struct pci_driver il4965_driver = {
6782 .name = DRV_NAME,
6783 .id_table = il4965_hw_card_ids,
6784 .probe = il4965_pci_probe,
6785 .remove = il4965_pci_remove,
6786 .driver.pm = IL_LEGACY_PM_OPS,
6787};
6788
6789static int __init
6790il4965_init(void)
6791{
6792
6793 int ret;
6794 pr_info(DRV_DESCRIPTION ", " DRV_VERSION "\n");
6795 pr_info(DRV_COPYRIGHT "\n");
6796
6797 ret = il4965_rate_control_register();
6798 if (ret) {
6799 pr_err("Unable to register rate control algorithm: %d\n", ret);
6800 return ret;
6801 }
6802
6803 ret = pci_register_driver(&il4965_driver);
6804 if (ret) {
6805 pr_err("Unable to initialize PCI module\n");
6806 goto error_register;
6807 }
6808
6809 return ret;
6810
6811error_register:
6812 il4965_rate_control_unregister();
6813 return ret;
6814}
6815
6816static void __exit
6817il4965_exit(void)
6818{
6819 pci_unregister_driver(&il4965_driver);
6820 il4965_rate_control_unregister();
6821}
6822
6823module_exit(il4965_exit);
6824module_init(il4965_init);
6825
6826#ifdef CONFIG_IWLEGACY_DEBUG
6827module_param_named(debug, il_debug_level, uint, 0644);
6828MODULE_PARM_DESC(debug, "debug output mask");
6829#endif
6830
6831module_param_named(swcrypto, il4965_mod_params.sw_crypto, int, 0444);
6832MODULE_PARM_DESC(swcrypto, "using crypto in software (default 0 [hardware])");
6833module_param_named(queues_num, il4965_mod_params.num_of_queues, int, 0444);
6834MODULE_PARM_DESC(queues_num, "number of hw queues.");
6835module_param_named(11n_disable, il4965_mod_params.disable_11n, int, 0444);
6836MODULE_PARM_DESC(11n_disable, "disable 11n functionality");
6837module_param_named(amsdu_size_8K, il4965_mod_params.amsdu_size_8K, int, 0444);
6838MODULE_PARM_DESC(amsdu_size_8K, "enable 8K amsdu size (default 0 [disabled])");
6839module_param_named(fw_restart, il4965_mod_params.restart_fw, int, 0444);
6840MODULE_PARM_DESC(fw_restart, "restart firmware in case of error");
1/******************************************************************************
2 *
3 * Copyright(c) 2003 - 2011 Intel Corporation. All rights reserved.
4 *
5 * Portions of this file are derived from the ipw3945 project, as well
6 * as portions of the ieee80211 subsystem header files.
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of version 2 of the GNU General Public License as
10 * published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * more details.
16 *
17 * You should have received a copy of the GNU General Public License along with
18 * this program; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
20 *
21 * The full GNU General Public License is included in this distribution in the
22 * file called LICENSE.
23 *
24 * Contact Information:
25 * Intel Linux Wireless <ilw@linux.intel.com>
26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *
28 *****************************************************************************/
29
30#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
31
32#include <linux/kernel.h>
33#include <linux/module.h>
34#include <linux/init.h>
35#include <linux/pci.h>
36#include <linux/pci-aspm.h>
37#include <linux/slab.h>
38#include <linux/dma-mapping.h>
39#include <linux/delay.h>
40#include <linux/sched.h>
41#include <linux/skbuff.h>
42#include <linux/netdevice.h>
43#include <linux/firmware.h>
44#include <linux/etherdevice.h>
45#include <linux/if_arp.h>
46
47#include <net/mac80211.h>
48
49#include <asm/div64.h>
50
51#define DRV_NAME "iwl4965"
52
53#include "common.h"
54#include "4965.h"
55
56/******************************************************************************
57 *
58 * module boiler plate
59 *
60 ******************************************************************************/
61
62/*
63 * module name, copyright, version, etc.
64 */
65#define DRV_DESCRIPTION "Intel(R) Wireless WiFi 4965 driver for Linux"
66
67#ifdef CONFIG_IWLEGACY_DEBUG
68#define VD "d"
69#else
70#define VD
71#endif
72
73#define DRV_VERSION IWLWIFI_VERSION VD
74
75MODULE_DESCRIPTION(DRV_DESCRIPTION);
76MODULE_VERSION(DRV_VERSION);
77MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
78MODULE_LICENSE("GPL");
79MODULE_ALIAS("iwl4965");
80
81void
82il4965_check_abort_status(struct il_priv *il, u8 frame_count, u32 status)
83{
84 if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) {
85 IL_ERR("Tx flush command to flush out all frames\n");
86 if (!test_bit(S_EXIT_PENDING, &il->status))
87 queue_work(il->workqueue, &il->tx_flush);
88 }
89}
90
91/*
92 * EEPROM
93 */
94struct il_mod_params il4965_mod_params = {
95 .restart_fw = 1,
96 /* the rest are 0 by default */
97};
98
99void
100il4965_rx_queue_reset(struct il_priv *il, struct il_rx_queue *rxq)
101{
102 unsigned long flags;
103 int i;
104 spin_lock_irqsave(&rxq->lock, flags);
105 INIT_LIST_HEAD(&rxq->rx_free);
106 INIT_LIST_HEAD(&rxq->rx_used);
107 /* Fill the rx_used queue with _all_ of the Rx buffers */
108 for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
109 /* In the reset function, these buffers may have been allocated
110 * to an SKB, so we need to unmap and free potential storage */
111 if (rxq->pool[i].page != NULL) {
112 pci_unmap_page(il->pci_dev, rxq->pool[i].page_dma,
113 PAGE_SIZE << il->hw_params.rx_page_order,
114 PCI_DMA_FROMDEVICE);
115 __il_free_pages(il, rxq->pool[i].page);
116 rxq->pool[i].page = NULL;
117 }
118 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
119 }
120
121 for (i = 0; i < RX_QUEUE_SIZE; i++)
122 rxq->queue[i] = NULL;
123
124 /* Set us so that we have processed and used all buffers, but have
125 * not restocked the Rx queue with fresh buffers */
126 rxq->read = rxq->write = 0;
127 rxq->write_actual = 0;
128 rxq->free_count = 0;
129 spin_unlock_irqrestore(&rxq->lock, flags);
130}
131
132int
133il4965_rx_init(struct il_priv *il, struct il_rx_queue *rxq)
134{
135 u32 rb_size;
136 const u32 rfdnlog = RX_QUEUE_SIZE_LOG; /* 256 RBDs */
137 u32 rb_timeout = 0;
138
139 if (il->cfg->mod_params->amsdu_size_8K)
140 rb_size = FH49_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_8K;
141 else
142 rb_size = FH49_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_4K;
143
144 /* Stop Rx DMA */
145 il_wr(il, FH49_MEM_RCSR_CHNL0_CONFIG_REG, 0);
146
147 /* Reset driver's Rx queue write idx */
148 il_wr(il, FH49_RSCSR_CHNL0_RBDCB_WPTR_REG, 0);
149
150 /* Tell device where to find RBD circular buffer in DRAM */
151 il_wr(il, FH49_RSCSR_CHNL0_RBDCB_BASE_REG, (u32) (rxq->bd_dma >> 8));
152
153 /* Tell device where in DRAM to update its Rx status */
154 il_wr(il, FH49_RSCSR_CHNL0_STTS_WPTR_REG, rxq->rb_stts_dma >> 4);
155
156 /* Enable Rx DMA
157 * Direct rx interrupts to hosts
158 * Rx buffer size 4 or 8k
159 * RB timeout 0x10
160 * 256 RBDs
161 */
162 il_wr(il, FH49_MEM_RCSR_CHNL0_CONFIG_REG,
163 FH49_RCSR_RX_CONFIG_CHNL_EN_ENABLE_VAL |
164 FH49_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_INT_HOST_VAL |
165 FH49_RCSR_CHNL0_RX_CONFIG_SINGLE_FRAME_MSK |
166 rb_size |
167 (rb_timeout << FH49_RCSR_RX_CONFIG_REG_IRQ_RBTH_POS) |
168 (rfdnlog << FH49_RCSR_RX_CONFIG_RBDCB_SIZE_POS));
169
170 /* Set interrupt coalescing timer to default (2048 usecs) */
171 il_write8(il, CSR_INT_COALESCING, IL_HOST_INT_TIMEOUT_DEF);
172
173 return 0;
174}
175
176static void
177il4965_set_pwr_vmain(struct il_priv *il)
178{
179/*
180 * (for documentation purposes)
181 * to set power to V_AUX, do:
182
183 if (pci_pme_capable(il->pci_dev, PCI_D3cold))
184 il_set_bits_mask_prph(il, APMG_PS_CTRL_REG,
185 APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
186 ~APMG_PS_CTRL_MSK_PWR_SRC);
187 */
188
189 il_set_bits_mask_prph(il, APMG_PS_CTRL_REG,
190 APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
191 ~APMG_PS_CTRL_MSK_PWR_SRC);
192}
193
194int
195il4965_hw_nic_init(struct il_priv *il)
196{
197 unsigned long flags;
198 struct il_rx_queue *rxq = &il->rxq;
199 int ret;
200
201 spin_lock_irqsave(&il->lock, flags);
202 il_apm_init(il);
203 /* Set interrupt coalescing calibration timer to default (512 usecs) */
204 il_write8(il, CSR_INT_COALESCING, IL_HOST_INT_CALIB_TIMEOUT_DEF);
205 spin_unlock_irqrestore(&il->lock, flags);
206
207 il4965_set_pwr_vmain(il);
208 il4965_nic_config(il);
209
210 /* Allocate the RX queue, or reset if it is already allocated */
211 if (!rxq->bd) {
212 ret = il_rx_queue_alloc(il);
213 if (ret) {
214 IL_ERR("Unable to initialize Rx queue\n");
215 return -ENOMEM;
216 }
217 } else
218 il4965_rx_queue_reset(il, rxq);
219
220 il4965_rx_replenish(il);
221
222 il4965_rx_init(il, rxq);
223
224 spin_lock_irqsave(&il->lock, flags);
225
226 rxq->need_update = 1;
227 il_rx_queue_update_write_ptr(il, rxq);
228
229 spin_unlock_irqrestore(&il->lock, flags);
230
231 /* Allocate or reset and init all Tx and Command queues */
232 if (!il->txq) {
233 ret = il4965_txq_ctx_alloc(il);
234 if (ret)
235 return ret;
236 } else
237 il4965_txq_ctx_reset(il);
238
239 set_bit(S_INIT, &il->status);
240
241 return 0;
242}
243
244/**
245 * il4965_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
246 */
247static inline __le32
248il4965_dma_addr2rbd_ptr(struct il_priv *il, dma_addr_t dma_addr)
249{
250 return cpu_to_le32((u32) (dma_addr >> 8));
251}
252
253/**
254 * il4965_rx_queue_restock - refill RX queue from pre-allocated pool
255 *
256 * If there are slots in the RX queue that need to be restocked,
257 * and we have free pre-allocated buffers, fill the ranks as much
258 * as we can, pulling from rx_free.
259 *
260 * This moves the 'write' idx forward to catch up with 'processed', and
261 * also updates the memory address in the firmware to reference the new
262 * target buffer.
263 */
264void
265il4965_rx_queue_restock(struct il_priv *il)
266{
267 struct il_rx_queue *rxq = &il->rxq;
268 struct list_head *element;
269 struct il_rx_buf *rxb;
270 unsigned long flags;
271
272 spin_lock_irqsave(&rxq->lock, flags);
273 while (il_rx_queue_space(rxq) > 0 && rxq->free_count) {
274 /* The overwritten rxb must be a used one */
275 rxb = rxq->queue[rxq->write];
276 BUG_ON(rxb && rxb->page);
277
278 /* Get next free Rx buffer, remove from free list */
279 element = rxq->rx_free.next;
280 rxb = list_entry(element, struct il_rx_buf, list);
281 list_del(element);
282
283 /* Point to Rx buffer via next RBD in circular buffer */
284 rxq->bd[rxq->write] =
285 il4965_dma_addr2rbd_ptr(il, rxb->page_dma);
286 rxq->queue[rxq->write] = rxb;
287 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
288 rxq->free_count--;
289 }
290 spin_unlock_irqrestore(&rxq->lock, flags);
291 /* If the pre-allocated buffer pool is dropping low, schedule to
292 * refill it */
293 if (rxq->free_count <= RX_LOW_WATERMARK)
294 queue_work(il->workqueue, &il->rx_replenish);
295
296 /* If we've added more space for the firmware to place data, tell it.
297 * Increment device's write pointer in multiples of 8. */
298 if (rxq->write_actual != (rxq->write & ~0x7)) {
299 spin_lock_irqsave(&rxq->lock, flags);
300 rxq->need_update = 1;
301 spin_unlock_irqrestore(&rxq->lock, flags);
302 il_rx_queue_update_write_ptr(il, rxq);
303 }
304}
305
306/**
307 * il4965_rx_replenish - Move all used packet from rx_used to rx_free
308 *
309 * When moving to rx_free an SKB is allocated for the slot.
310 *
311 * Also restock the Rx queue via il_rx_queue_restock.
312 * This is called as a scheduled work item (except for during initialization)
313 */
314static void
315il4965_rx_allocate(struct il_priv *il, gfp_t priority)
316{
317 struct il_rx_queue *rxq = &il->rxq;
318 struct list_head *element;
319 struct il_rx_buf *rxb;
320 struct page *page;
321 dma_addr_t page_dma;
322 unsigned long flags;
323 gfp_t gfp_mask = priority;
324
325 while (1) {
326 spin_lock_irqsave(&rxq->lock, flags);
327 if (list_empty(&rxq->rx_used)) {
328 spin_unlock_irqrestore(&rxq->lock, flags);
329 return;
330 }
331 spin_unlock_irqrestore(&rxq->lock, flags);
332
333 if (rxq->free_count > RX_LOW_WATERMARK)
334 gfp_mask |= __GFP_NOWARN;
335
336 if (il->hw_params.rx_page_order > 0)
337 gfp_mask |= __GFP_COMP;
338
339 /* Alloc a new receive buffer */
340 page = alloc_pages(gfp_mask, il->hw_params.rx_page_order);
341 if (!page) {
342 if (net_ratelimit())
343 D_INFO("alloc_pages failed, " "order: %d\n",
344 il->hw_params.rx_page_order);
345
346 if (rxq->free_count <= RX_LOW_WATERMARK &&
347 net_ratelimit())
348 IL_ERR("Failed to alloc_pages with %s. "
349 "Only %u free buffers remaining.\n",
350 priority ==
351 GFP_ATOMIC ? "GFP_ATOMIC" : "GFP_KERNEL",
352 rxq->free_count);
353 /* We don't reschedule replenish work here -- we will
354 * call the restock method and if it still needs
355 * more buffers it will schedule replenish */
356 return;
357 }
358
359 /* Get physical address of the RB */
360 page_dma =
361 pci_map_page(il->pci_dev, page, 0,
362 PAGE_SIZE << il->hw_params.rx_page_order,
363 PCI_DMA_FROMDEVICE);
364 if (unlikely(pci_dma_mapping_error(il->pci_dev, page_dma))) {
365 __free_pages(page, il->hw_params.rx_page_order);
366 break;
367 }
368
369 spin_lock_irqsave(&rxq->lock, flags);
370
371 if (list_empty(&rxq->rx_used)) {
372 spin_unlock_irqrestore(&rxq->lock, flags);
373 pci_unmap_page(il->pci_dev, page_dma,
374 PAGE_SIZE << il->hw_params.rx_page_order,
375 PCI_DMA_FROMDEVICE);
376 __free_pages(page, il->hw_params.rx_page_order);
377 return;
378 }
379
380 element = rxq->rx_used.next;
381 rxb = list_entry(element, struct il_rx_buf, list);
382 list_del(element);
383
384 BUG_ON(rxb->page);
385
386 rxb->page = page;
387 rxb->page_dma = page_dma;
388 list_add_tail(&rxb->list, &rxq->rx_free);
389 rxq->free_count++;
390 il->alloc_rxb_page++;
391
392 spin_unlock_irqrestore(&rxq->lock, flags);
393 }
394}
395
396void
397il4965_rx_replenish(struct il_priv *il)
398{
399 unsigned long flags;
400
401 il4965_rx_allocate(il, GFP_KERNEL);
402
403 spin_lock_irqsave(&il->lock, flags);
404 il4965_rx_queue_restock(il);
405 spin_unlock_irqrestore(&il->lock, flags);
406}
407
408void
409il4965_rx_replenish_now(struct il_priv *il)
410{
411 il4965_rx_allocate(il, GFP_ATOMIC);
412
413 il4965_rx_queue_restock(il);
414}
415
416/* Assumes that the skb field of the buffers in 'pool' is kept accurate.
417 * If an SKB has been detached, the POOL needs to have its SKB set to NULL
418 * This free routine walks the list of POOL entries and if SKB is set to
419 * non NULL it is unmapped and freed
420 */
421void
422il4965_rx_queue_free(struct il_priv *il, struct il_rx_queue *rxq)
423{
424 int i;
425 for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
426 if (rxq->pool[i].page != NULL) {
427 pci_unmap_page(il->pci_dev, rxq->pool[i].page_dma,
428 PAGE_SIZE << il->hw_params.rx_page_order,
429 PCI_DMA_FROMDEVICE);
430 __il_free_pages(il, rxq->pool[i].page);
431 rxq->pool[i].page = NULL;
432 }
433 }
434
435 dma_free_coherent(&il->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd,
436 rxq->bd_dma);
437 dma_free_coherent(&il->pci_dev->dev, sizeof(struct il_rb_status),
438 rxq->rb_stts, rxq->rb_stts_dma);
439 rxq->bd = NULL;
440 rxq->rb_stts = NULL;
441}
442
443int
444il4965_rxq_stop(struct il_priv *il)
445{
446 int ret;
447
448 _il_wr(il, FH49_MEM_RCSR_CHNL0_CONFIG_REG, 0);
449 ret = _il_poll_bit(il, FH49_MEM_RSSR_RX_STATUS_REG,
450 FH49_RSSR_CHNL0_RX_STATUS_CHNL_IDLE,
451 FH49_RSSR_CHNL0_RX_STATUS_CHNL_IDLE,
452 1000);
453 if (ret < 0)
454 IL_ERR("Can't stop Rx DMA.\n");
455
456 return 0;
457}
458
459int
460il4965_hwrate_to_mac80211_idx(u32 rate_n_flags, enum ieee80211_band band)
461{
462 int idx = 0;
463 int band_offset = 0;
464
465 /* HT rate format: mac80211 wants an MCS number, which is just LSB */
466 if (rate_n_flags & RATE_MCS_HT_MSK) {
467 idx = (rate_n_flags & 0xff);
468 return idx;
469 /* Legacy rate format, search for match in table */
470 } else {
471 if (band == IEEE80211_BAND_5GHZ)
472 band_offset = IL_FIRST_OFDM_RATE;
473 for (idx = band_offset; idx < RATE_COUNT_LEGACY; idx++)
474 if (il_rates[idx].plcp == (rate_n_flags & 0xFF))
475 return idx - band_offset;
476 }
477
478 return -1;
479}
480
481static int
482il4965_calc_rssi(struct il_priv *il, struct il_rx_phy_res *rx_resp)
483{
484 /* data from PHY/DSP regarding signal strength, etc.,
485 * contents are always there, not configurable by host. */
486 struct il4965_rx_non_cfg_phy *ncphy =
487 (struct il4965_rx_non_cfg_phy *)rx_resp->non_cfg_phy_buf;
488 u32 agc =
489 (le16_to_cpu(ncphy->agc_info) & IL49_AGC_DB_MASK) >>
490 IL49_AGC_DB_POS;
491
492 u32 valid_antennae =
493 (le16_to_cpu(rx_resp->phy_flags) & IL49_RX_PHY_FLAGS_ANTENNAE_MASK)
494 >> IL49_RX_PHY_FLAGS_ANTENNAE_OFFSET;
495 u8 max_rssi = 0;
496 u32 i;
497
498 /* Find max rssi among 3 possible receivers.
499 * These values are measured by the digital signal processor (DSP).
500 * They should stay fairly constant even as the signal strength varies,
501 * if the radio's automatic gain control (AGC) is working right.
502 * AGC value (see below) will provide the "interesting" info. */
503 for (i = 0; i < 3; i++)
504 if (valid_antennae & (1 << i))
505 max_rssi = max(ncphy->rssi_info[i << 1], max_rssi);
506
507 D_STATS("Rssi In A %d B %d C %d Max %d AGC dB %d\n",
508 ncphy->rssi_info[0], ncphy->rssi_info[2], ncphy->rssi_info[4],
509 max_rssi, agc);
510
511 /* dBm = max_rssi dB - agc dB - constant.
512 * Higher AGC (higher radio gain) means lower signal. */
513 return max_rssi - agc - IL4965_RSSI_OFFSET;
514}
515
516static u32
517il4965_translate_rx_status(struct il_priv *il, u32 decrypt_in)
518{
519 u32 decrypt_out = 0;
520
521 if ((decrypt_in & RX_RES_STATUS_STATION_FOUND) ==
522 RX_RES_STATUS_STATION_FOUND)
523 decrypt_out |=
524 (RX_RES_STATUS_STATION_FOUND |
525 RX_RES_STATUS_NO_STATION_INFO_MISMATCH);
526
527 decrypt_out |= (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK);
528
529 /* packet was not encrypted */
530 if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
531 RX_RES_STATUS_SEC_TYPE_NONE)
532 return decrypt_out;
533
534 /* packet was encrypted with unknown alg */
535 if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
536 RX_RES_STATUS_SEC_TYPE_ERR)
537 return decrypt_out;
538
539 /* decryption was not done in HW */
540 if ((decrypt_in & RX_MPDU_RES_STATUS_DEC_DONE_MSK) !=
541 RX_MPDU_RES_STATUS_DEC_DONE_MSK)
542 return decrypt_out;
543
544 switch (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) {
545
546 case RX_RES_STATUS_SEC_TYPE_CCMP:
547 /* alg is CCM: check MIC only */
548 if (!(decrypt_in & RX_MPDU_RES_STATUS_MIC_OK))
549 /* Bad MIC */
550 decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
551 else
552 decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
553
554 break;
555
556 case RX_RES_STATUS_SEC_TYPE_TKIP:
557 if (!(decrypt_in & RX_MPDU_RES_STATUS_TTAK_OK)) {
558 /* Bad TTAK */
559 decrypt_out |= RX_RES_STATUS_BAD_KEY_TTAK;
560 break;
561 }
562 /* fall through if TTAK OK */
563 default:
564 if (!(decrypt_in & RX_MPDU_RES_STATUS_ICV_OK))
565 decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
566 else
567 decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
568 break;
569 }
570
571 D_RX("decrypt_in:0x%x decrypt_out = 0x%x\n", decrypt_in, decrypt_out);
572
573 return decrypt_out;
574}
575
576#define SMALL_PACKET_SIZE 256
577
578static void
579il4965_pass_packet_to_mac80211(struct il_priv *il, struct ieee80211_hdr *hdr,
580 u32 len, u32 ampdu_status, struct il_rx_buf *rxb,
581 struct ieee80211_rx_status *stats)
582{
583 struct sk_buff *skb;
584 __le16 fc = hdr->frame_control;
585
586 /* We only process data packets if the interface is open */
587 if (unlikely(!il->is_open)) {
588 D_DROP("Dropping packet while interface is not open.\n");
589 return;
590 }
591
592 if (unlikely(test_bit(IL_STOP_REASON_PASSIVE, &il->stop_reason))) {
593 il_wake_queues_by_reason(il, IL_STOP_REASON_PASSIVE);
594 D_INFO("Woke queues - frame received on passive channel\n");
595 }
596
597 /* In case of HW accelerated crypto and bad decryption, drop */
598 if (!il->cfg->mod_params->sw_crypto &&
599 il_set_decrypted_flag(il, hdr, ampdu_status, stats))
600 return;
601
602 skb = dev_alloc_skb(SMALL_PACKET_SIZE);
603 if (!skb) {
604 IL_ERR("dev_alloc_skb failed\n");
605 return;
606 }
607
608 if (len <= SMALL_PACKET_SIZE) {
609 memcpy(skb_put(skb, len), hdr, len);
610 } else {
611 skb_add_rx_frag(skb, 0, rxb->page, (void *)hdr - rxb_addr(rxb),
612 len, PAGE_SIZE << il->hw_params.rx_page_order);
613 il->alloc_rxb_page--;
614 rxb->page = NULL;
615 }
616
617 il_update_stats(il, false, fc, len);
618 memcpy(IEEE80211_SKB_RXCB(skb), stats, sizeof(*stats));
619
620 ieee80211_rx(il->hw, skb);
621}
622
623/* Called for N_RX (legacy ABG frames), or
624 * N_RX_MPDU (HT high-throughput N frames). */
625static void
626il4965_hdl_rx(struct il_priv *il, struct il_rx_buf *rxb)
627{
628 struct ieee80211_hdr *header;
629 struct ieee80211_rx_status rx_status = {};
630 struct il_rx_pkt *pkt = rxb_addr(rxb);
631 struct il_rx_phy_res *phy_res;
632 __le32 rx_pkt_status;
633 struct il_rx_mpdu_res_start *amsdu;
634 u32 len;
635 u32 ampdu_status;
636 u32 rate_n_flags;
637
638 /**
639 * N_RX and N_RX_MPDU are handled differently.
640 * N_RX: physical layer info is in this buffer
641 * N_RX_MPDU: physical layer info was sent in separate
642 * command and cached in il->last_phy_res
643 *
644 * Here we set up local variables depending on which command is
645 * received.
646 */
647 if (pkt->hdr.cmd == N_RX) {
648 phy_res = (struct il_rx_phy_res *)pkt->u.raw;
649 header =
650 (struct ieee80211_hdr *)(pkt->u.raw + sizeof(*phy_res) +
651 phy_res->cfg_phy_cnt);
652
653 len = le16_to_cpu(phy_res->byte_count);
654 rx_pkt_status =
655 *(__le32 *) (pkt->u.raw + sizeof(*phy_res) +
656 phy_res->cfg_phy_cnt + len);
657 ampdu_status = le32_to_cpu(rx_pkt_status);
658 } else {
659 if (!il->_4965.last_phy_res_valid) {
660 IL_ERR("MPDU frame without cached PHY data\n");
661 return;
662 }
663 phy_res = &il->_4965.last_phy_res;
664 amsdu = (struct il_rx_mpdu_res_start *)pkt->u.raw;
665 header = (struct ieee80211_hdr *)(pkt->u.raw + sizeof(*amsdu));
666 len = le16_to_cpu(amsdu->byte_count);
667 rx_pkt_status = *(__le32 *) (pkt->u.raw + sizeof(*amsdu) + len);
668 ampdu_status =
669 il4965_translate_rx_status(il, le32_to_cpu(rx_pkt_status));
670 }
671
672 if ((unlikely(phy_res->cfg_phy_cnt > 20))) {
673 D_DROP("dsp size out of range [0,20]: %d\n",
674 phy_res->cfg_phy_cnt);
675 return;
676 }
677
678 if (!(rx_pkt_status & RX_RES_STATUS_NO_CRC32_ERROR) ||
679 !(rx_pkt_status & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
680 D_RX("Bad CRC or FIFO: 0x%08X.\n", le32_to_cpu(rx_pkt_status));
681 return;
682 }
683
684 /* This will be used in several places later */
685 rate_n_flags = le32_to_cpu(phy_res->rate_n_flags);
686
687 /* rx_status carries information about the packet to mac80211 */
688 rx_status.mactime = le64_to_cpu(phy_res->timestamp);
689 rx_status.band =
690 (phy_res->
691 phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ? IEEE80211_BAND_2GHZ :
692 IEEE80211_BAND_5GHZ;
693 rx_status.freq =
694 ieee80211_channel_to_frequency(le16_to_cpu(phy_res->channel),
695 rx_status.band);
696 rx_status.rate_idx =
697 il4965_hwrate_to_mac80211_idx(rate_n_flags, rx_status.band);
698 rx_status.flag = 0;
699
700 /* TSF isn't reliable. In order to allow smooth user experience,
701 * this W/A doesn't propagate it to the mac80211 */
702 /*rx_status.flag |= RX_FLAG_MACTIME_START; */
703
704 il->ucode_beacon_time = le32_to_cpu(phy_res->beacon_time_stamp);
705
706 /* Find max signal strength (dBm) among 3 antenna/receiver chains */
707 rx_status.signal = il4965_calc_rssi(il, phy_res);
708
709 D_STATS("Rssi %d, TSF %llu\n", rx_status.signal,
710 (unsigned long long)rx_status.mactime);
711
712 /*
713 * "antenna number"
714 *
715 * It seems that the antenna field in the phy flags value
716 * is actually a bit field. This is undefined by radiotap,
717 * it wants an actual antenna number but I always get "7"
718 * for most legacy frames I receive indicating that the
719 * same frame was received on all three RX chains.
720 *
721 * I think this field should be removed in favor of a
722 * new 802.11n radiotap field "RX chains" that is defined
723 * as a bitmask.
724 */
725 rx_status.antenna =
726 (le16_to_cpu(phy_res->phy_flags) & RX_RES_PHY_FLAGS_ANTENNA_MSK) >>
727 RX_RES_PHY_FLAGS_ANTENNA_POS;
728
729 /* set the preamble flag if appropriate */
730 if (phy_res->phy_flags & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
731 rx_status.flag |= RX_FLAG_SHORTPRE;
732
733 /* Set up the HT phy flags */
734 if (rate_n_flags & RATE_MCS_HT_MSK)
735 rx_status.flag |= RX_FLAG_HT;
736 if (rate_n_flags & RATE_MCS_HT40_MSK)
737 rx_status.flag |= RX_FLAG_40MHZ;
738 if (rate_n_flags & RATE_MCS_SGI_MSK)
739 rx_status.flag |= RX_FLAG_SHORT_GI;
740
741 if (phy_res->phy_flags & RX_RES_PHY_FLAGS_AGG_MSK) {
742 /* We know which subframes of an A-MPDU belong
743 * together since we get a single PHY response
744 * from the firmware for all of them.
745 */
746
747 rx_status.flag |= RX_FLAG_AMPDU_DETAILS;
748 rx_status.ampdu_reference = il->_4965.ampdu_ref;
749 }
750
751 il4965_pass_packet_to_mac80211(il, header, len, ampdu_status, rxb,
752 &rx_status);
753}
754
755/* Cache phy data (Rx signal strength, etc) for HT frame (N_RX_PHY).
756 * This will be used later in il_hdl_rx() for N_RX_MPDU. */
757static void
758il4965_hdl_rx_phy(struct il_priv *il, struct il_rx_buf *rxb)
759{
760 struct il_rx_pkt *pkt = rxb_addr(rxb);
761 il->_4965.last_phy_res_valid = true;
762 il->_4965.ampdu_ref++;
763 memcpy(&il->_4965.last_phy_res, pkt->u.raw,
764 sizeof(struct il_rx_phy_res));
765}
766
767static int
768il4965_get_channels_for_scan(struct il_priv *il, struct ieee80211_vif *vif,
769 enum ieee80211_band band, u8 is_active,
770 u8 n_probes, struct il_scan_channel *scan_ch)
771{
772 struct ieee80211_channel *chan;
773 const struct ieee80211_supported_band *sband;
774 const struct il_channel_info *ch_info;
775 u16 passive_dwell = 0;
776 u16 active_dwell = 0;
777 int added, i;
778 u16 channel;
779
780 sband = il_get_hw_mode(il, band);
781 if (!sband)
782 return 0;
783
784 active_dwell = il_get_active_dwell_time(il, band, n_probes);
785 passive_dwell = il_get_passive_dwell_time(il, band, vif);
786
787 if (passive_dwell <= active_dwell)
788 passive_dwell = active_dwell + 1;
789
790 for (i = 0, added = 0; i < il->scan_request->n_channels; i++) {
791 chan = il->scan_request->channels[i];
792
793 if (chan->band != band)
794 continue;
795
796 channel = chan->hw_value;
797 scan_ch->channel = cpu_to_le16(channel);
798
799 ch_info = il_get_channel_info(il, band, channel);
800 if (!il_is_channel_valid(ch_info)) {
801 D_SCAN("Channel %d is INVALID for this band.\n",
802 channel);
803 continue;
804 }
805
806 if (!is_active || il_is_channel_passive(ch_info) ||
807 (chan->flags & IEEE80211_CHAN_NO_IR))
808 scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE;
809 else
810 scan_ch->type = SCAN_CHANNEL_TYPE_ACTIVE;
811
812 if (n_probes)
813 scan_ch->type |= IL_SCAN_PROBE_MASK(n_probes);
814
815 scan_ch->active_dwell = cpu_to_le16(active_dwell);
816 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
817
818 /* Set txpower levels to defaults */
819 scan_ch->dsp_atten = 110;
820
821 /* NOTE: if we were doing 6Mb OFDM for scans we'd use
822 * power level:
823 * scan_ch->tx_gain = ((1 << 5) | (2 << 3)) | 3;
824 */
825 if (band == IEEE80211_BAND_5GHZ)
826 scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3;
827 else
828 scan_ch->tx_gain = ((1 << 5) | (5 << 3));
829
830 D_SCAN("Scanning ch=%d prob=0x%X [%s %d]\n", channel,
831 le32_to_cpu(scan_ch->type),
832 (scan_ch->
833 type & SCAN_CHANNEL_TYPE_ACTIVE) ? "ACTIVE" : "PASSIVE",
834 (scan_ch->
835 type & SCAN_CHANNEL_TYPE_ACTIVE) ? active_dwell :
836 passive_dwell);
837
838 scan_ch++;
839 added++;
840 }
841
842 D_SCAN("total channels to scan %d\n", added);
843 return added;
844}
845
846static void
847il4965_toggle_tx_ant(struct il_priv *il, u8 *ant, u8 valid)
848{
849 int i;
850 u8 ind = *ant;
851
852 for (i = 0; i < RATE_ANT_NUM - 1; i++) {
853 ind = (ind + 1) < RATE_ANT_NUM ? ind + 1 : 0;
854 if (valid & BIT(ind)) {
855 *ant = ind;
856 return;
857 }
858 }
859}
860
861int
862il4965_request_scan(struct il_priv *il, struct ieee80211_vif *vif)
863{
864 struct il_host_cmd cmd = {
865 .id = C_SCAN,
866 .len = sizeof(struct il_scan_cmd),
867 .flags = CMD_SIZE_HUGE,
868 };
869 struct il_scan_cmd *scan;
870 u32 rate_flags = 0;
871 u16 cmd_len;
872 u16 rx_chain = 0;
873 enum ieee80211_band band;
874 u8 n_probes = 0;
875 u8 rx_ant = il->hw_params.valid_rx_ant;
876 u8 rate;
877 bool is_active = false;
878 int chan_mod;
879 u8 active_chains;
880 u8 scan_tx_antennas = il->hw_params.valid_tx_ant;
881 int ret;
882
883 lockdep_assert_held(&il->mutex);
884
885 if (!il->scan_cmd) {
886 il->scan_cmd =
887 kmalloc(sizeof(struct il_scan_cmd) + IL_MAX_SCAN_SIZE,
888 GFP_KERNEL);
889 if (!il->scan_cmd) {
890 D_SCAN("fail to allocate memory for scan\n");
891 return -ENOMEM;
892 }
893 }
894 scan = il->scan_cmd;
895 memset(scan, 0, sizeof(struct il_scan_cmd) + IL_MAX_SCAN_SIZE);
896
897 scan->quiet_plcp_th = IL_PLCP_QUIET_THRESH;
898 scan->quiet_time = IL_ACTIVE_QUIET_TIME;
899
900 if (il_is_any_associated(il)) {
901 u16 interval;
902 u32 extra;
903 u32 suspend_time = 100;
904 u32 scan_suspend_time = 100;
905
906 D_INFO("Scanning while associated...\n");
907 interval = vif->bss_conf.beacon_int;
908
909 scan->suspend_time = 0;
910 scan->max_out_time = cpu_to_le32(200 * 1024);
911 if (!interval)
912 interval = suspend_time;
913
914 extra = (suspend_time / interval) << 22;
915 scan_suspend_time =
916 (extra | ((suspend_time % interval) * 1024));
917 scan->suspend_time = cpu_to_le32(scan_suspend_time);
918 D_SCAN("suspend_time 0x%X beacon interval %d\n",
919 scan_suspend_time, interval);
920 }
921
922 if (il->scan_request->n_ssids) {
923 int i, p = 0;
924 D_SCAN("Kicking off active scan\n");
925 for (i = 0; i < il->scan_request->n_ssids; i++) {
926 /* always does wildcard anyway */
927 if (!il->scan_request->ssids[i].ssid_len)
928 continue;
929 scan->direct_scan[p].id = WLAN_EID_SSID;
930 scan->direct_scan[p].len =
931 il->scan_request->ssids[i].ssid_len;
932 memcpy(scan->direct_scan[p].ssid,
933 il->scan_request->ssids[i].ssid,
934 il->scan_request->ssids[i].ssid_len);
935 n_probes++;
936 p++;
937 }
938 is_active = true;
939 } else
940 D_SCAN("Start passive scan.\n");
941
942 scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
943 scan->tx_cmd.sta_id = il->hw_params.bcast_id;
944 scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
945
946 switch (il->scan_band) {
947 case IEEE80211_BAND_2GHZ:
948 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
949 chan_mod =
950 le32_to_cpu(il->active.flags & RXON_FLG_CHANNEL_MODE_MSK) >>
951 RXON_FLG_CHANNEL_MODE_POS;
952 if (chan_mod == CHANNEL_MODE_PURE_40) {
953 rate = RATE_6M_PLCP;
954 } else {
955 rate = RATE_1M_PLCP;
956 rate_flags = RATE_MCS_CCK_MSK;
957 }
958 break;
959 case IEEE80211_BAND_5GHZ:
960 rate = RATE_6M_PLCP;
961 break;
962 default:
963 IL_WARN("Invalid scan band\n");
964 return -EIO;
965 }
966
967 /*
968 * If active scanning is requested but a certain channel is
969 * marked passive, we can do active scanning if we detect
970 * transmissions.
971 *
972 * There is an issue with some firmware versions that triggers
973 * a sysassert on a "good CRC threshold" of zero (== disabled),
974 * on a radar channel even though this means that we should NOT
975 * send probes.
976 *
977 * The "good CRC threshold" is the number of frames that we
978 * need to receive during our dwell time on a channel before
979 * sending out probes -- setting this to a huge value will
980 * mean we never reach it, but at the same time work around
981 * the aforementioned issue. Thus use IL_GOOD_CRC_TH_NEVER
982 * here instead of IL_GOOD_CRC_TH_DISABLED.
983 */
984 scan->good_CRC_th =
985 is_active ? IL_GOOD_CRC_TH_DEFAULT : IL_GOOD_CRC_TH_NEVER;
986
987 band = il->scan_band;
988
989 if (il->cfg->scan_rx_antennas[band])
990 rx_ant = il->cfg->scan_rx_antennas[band];
991
992 il4965_toggle_tx_ant(il, &il->scan_tx_ant[band], scan_tx_antennas);
993 rate_flags |= BIT(il->scan_tx_ant[band]) << RATE_MCS_ANT_POS;
994 scan->tx_cmd.rate_n_flags = cpu_to_le32(rate | rate_flags);
995
996 /* In power save mode use one chain, otherwise use all chains */
997 if (test_bit(S_POWER_PMI, &il->status)) {
998 /* rx_ant has been set to all valid chains previously */
999 active_chains =
1000 rx_ant & ((u8) (il->chain_noise_data.active_chains));
1001 if (!active_chains)
1002 active_chains = rx_ant;
1003
1004 D_SCAN("chain_noise_data.active_chains: %u\n",
1005 il->chain_noise_data.active_chains);
1006
1007 rx_ant = il4965_first_antenna(active_chains);
1008 }
1009
1010 /* MIMO is not used here, but value is required */
1011 rx_chain |= il->hw_params.valid_rx_ant << RXON_RX_CHAIN_VALID_POS;
1012 rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS;
1013 rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_SEL_POS;
1014 rx_chain |= 0x1 << RXON_RX_CHAIN_DRIVER_FORCE_POS;
1015 scan->rx_chain = cpu_to_le16(rx_chain);
1016
1017 cmd_len =
1018 il_fill_probe_req(il, (struct ieee80211_mgmt *)scan->data,
1019 vif->addr, il->scan_request->ie,
1020 il->scan_request->ie_len,
1021 IL_MAX_SCAN_SIZE - sizeof(*scan));
1022 scan->tx_cmd.len = cpu_to_le16(cmd_len);
1023
1024 scan->filter_flags |=
1025 (RXON_FILTER_ACCEPT_GRP_MSK | RXON_FILTER_BCON_AWARE_MSK);
1026
1027 scan->channel_count =
1028 il4965_get_channels_for_scan(il, vif, band, is_active, n_probes,
1029 (void *)&scan->data[cmd_len]);
1030 if (scan->channel_count == 0) {
1031 D_SCAN("channel count %d\n", scan->channel_count);
1032 return -EIO;
1033 }
1034
1035 cmd.len +=
1036 le16_to_cpu(scan->tx_cmd.len) +
1037 scan->channel_count * sizeof(struct il_scan_channel);
1038 cmd.data = scan;
1039 scan->len = cpu_to_le16(cmd.len);
1040
1041 set_bit(S_SCAN_HW, &il->status);
1042
1043 ret = il_send_cmd_sync(il, &cmd);
1044 if (ret)
1045 clear_bit(S_SCAN_HW, &il->status);
1046
1047 return ret;
1048}
1049
1050int
1051il4965_manage_ibss_station(struct il_priv *il, struct ieee80211_vif *vif,
1052 bool add)
1053{
1054 struct il_vif_priv *vif_priv = (void *)vif->drv_priv;
1055
1056 if (add)
1057 return il4965_add_bssid_station(il, vif->bss_conf.bssid,
1058 &vif_priv->ibss_bssid_sta_id);
1059 return il_remove_station(il, vif_priv->ibss_bssid_sta_id,
1060 vif->bss_conf.bssid);
1061}
1062
1063void
1064il4965_free_tfds_in_queue(struct il_priv *il, int sta_id, int tid, int freed)
1065{
1066 lockdep_assert_held(&il->sta_lock);
1067
1068 if (il->stations[sta_id].tid[tid].tfds_in_queue >= freed)
1069 il->stations[sta_id].tid[tid].tfds_in_queue -= freed;
1070 else {
1071 D_TX("free more than tfds_in_queue (%u:%d)\n",
1072 il->stations[sta_id].tid[tid].tfds_in_queue, freed);
1073 il->stations[sta_id].tid[tid].tfds_in_queue = 0;
1074 }
1075}
1076
1077#define IL_TX_QUEUE_MSK 0xfffff
1078
1079static bool
1080il4965_is_single_rx_stream(struct il_priv *il)
1081{
1082 return il->current_ht_config.smps == IEEE80211_SMPS_STATIC ||
1083 il->current_ht_config.single_chain_sufficient;
1084}
1085
1086#define IL_NUM_RX_CHAINS_MULTIPLE 3
1087#define IL_NUM_RX_CHAINS_SINGLE 2
1088#define IL_NUM_IDLE_CHAINS_DUAL 2
1089#define IL_NUM_IDLE_CHAINS_SINGLE 1
1090
1091/*
1092 * Determine how many receiver/antenna chains to use.
1093 *
1094 * More provides better reception via diversity. Fewer saves power
1095 * at the expense of throughput, but only when not in powersave to
1096 * start with.
1097 *
1098 * MIMO (dual stream) requires at least 2, but works better with 3.
1099 * This does not determine *which* chains to use, just how many.
1100 */
1101static int
1102il4965_get_active_rx_chain_count(struct il_priv *il)
1103{
1104 /* # of Rx chains to use when expecting MIMO. */
1105 if (il4965_is_single_rx_stream(il))
1106 return IL_NUM_RX_CHAINS_SINGLE;
1107 else
1108 return IL_NUM_RX_CHAINS_MULTIPLE;
1109}
1110
1111/*
1112 * When we are in power saving mode, unless device support spatial
1113 * multiplexing power save, use the active count for rx chain count.
1114 */
1115static int
1116il4965_get_idle_rx_chain_count(struct il_priv *il, int active_cnt)
1117{
1118 /* # Rx chains when idling, depending on SMPS mode */
1119 switch (il->current_ht_config.smps) {
1120 case IEEE80211_SMPS_STATIC:
1121 case IEEE80211_SMPS_DYNAMIC:
1122 return IL_NUM_IDLE_CHAINS_SINGLE;
1123 case IEEE80211_SMPS_OFF:
1124 return active_cnt;
1125 default:
1126 WARN(1, "invalid SMPS mode %d", il->current_ht_config.smps);
1127 return active_cnt;
1128 }
1129}
1130
1131/* up to 4 chains */
1132static u8
1133il4965_count_chain_bitmap(u32 chain_bitmap)
1134{
1135 u8 res;
1136 res = (chain_bitmap & BIT(0)) >> 0;
1137 res += (chain_bitmap & BIT(1)) >> 1;
1138 res += (chain_bitmap & BIT(2)) >> 2;
1139 res += (chain_bitmap & BIT(3)) >> 3;
1140 return res;
1141}
1142
1143/**
1144 * il4965_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
1145 *
1146 * Selects how many and which Rx receivers/antennas/chains to use.
1147 * This should not be used for scan command ... it puts data in wrong place.
1148 */
1149void
1150il4965_set_rxon_chain(struct il_priv *il)
1151{
1152 bool is_single = il4965_is_single_rx_stream(il);
1153 bool is_cam = !test_bit(S_POWER_PMI, &il->status);
1154 u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt;
1155 u32 active_chains;
1156 u16 rx_chain;
1157
1158 /* Tell uCode which antennas are actually connected.
1159 * Before first association, we assume all antennas are connected.
1160 * Just after first association, il4965_chain_noise_calibration()
1161 * checks which antennas actually *are* connected. */
1162 if (il->chain_noise_data.active_chains)
1163 active_chains = il->chain_noise_data.active_chains;
1164 else
1165 active_chains = il->hw_params.valid_rx_ant;
1166
1167 rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS;
1168
1169 /* How many receivers should we use? */
1170 active_rx_cnt = il4965_get_active_rx_chain_count(il);
1171 idle_rx_cnt = il4965_get_idle_rx_chain_count(il, active_rx_cnt);
1172
1173 /* correct rx chain count according hw settings
1174 * and chain noise calibration
1175 */
1176 valid_rx_cnt = il4965_count_chain_bitmap(active_chains);
1177 if (valid_rx_cnt < active_rx_cnt)
1178 active_rx_cnt = valid_rx_cnt;
1179
1180 if (valid_rx_cnt < idle_rx_cnt)
1181 idle_rx_cnt = valid_rx_cnt;
1182
1183 rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS;
1184 rx_chain |= idle_rx_cnt << RXON_RX_CHAIN_CNT_POS;
1185
1186 il->staging.rx_chain = cpu_to_le16(rx_chain);
1187
1188 if (!is_single && active_rx_cnt >= IL_NUM_RX_CHAINS_SINGLE && is_cam)
1189 il->staging.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
1190 else
1191 il->staging.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
1192
1193 D_ASSOC("rx_chain=0x%X active=%d idle=%d\n", il->staging.rx_chain,
1194 active_rx_cnt, idle_rx_cnt);
1195
1196 WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 ||
1197 active_rx_cnt < idle_rx_cnt);
1198}
1199
1200static const char *
1201il4965_get_fh_string(int cmd)
1202{
1203 switch (cmd) {
1204 IL_CMD(FH49_RSCSR_CHNL0_STTS_WPTR_REG);
1205 IL_CMD(FH49_RSCSR_CHNL0_RBDCB_BASE_REG);
1206 IL_CMD(FH49_RSCSR_CHNL0_WPTR);
1207 IL_CMD(FH49_MEM_RCSR_CHNL0_CONFIG_REG);
1208 IL_CMD(FH49_MEM_RSSR_SHARED_CTRL_REG);
1209 IL_CMD(FH49_MEM_RSSR_RX_STATUS_REG);
1210 IL_CMD(FH49_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV);
1211 IL_CMD(FH49_TSSR_TX_STATUS_REG);
1212 IL_CMD(FH49_TSSR_TX_ERROR_REG);
1213 default:
1214 return "UNKNOWN";
1215 }
1216}
1217
1218int
1219il4965_dump_fh(struct il_priv *il, char **buf, bool display)
1220{
1221 int i;
1222#ifdef CONFIG_IWLEGACY_DEBUG
1223 int pos = 0;
1224 size_t bufsz = 0;
1225#endif
1226 static const u32 fh_tbl[] = {
1227 FH49_RSCSR_CHNL0_STTS_WPTR_REG,
1228 FH49_RSCSR_CHNL0_RBDCB_BASE_REG,
1229 FH49_RSCSR_CHNL0_WPTR,
1230 FH49_MEM_RCSR_CHNL0_CONFIG_REG,
1231 FH49_MEM_RSSR_SHARED_CTRL_REG,
1232 FH49_MEM_RSSR_RX_STATUS_REG,
1233 FH49_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV,
1234 FH49_TSSR_TX_STATUS_REG,
1235 FH49_TSSR_TX_ERROR_REG
1236 };
1237#ifdef CONFIG_IWLEGACY_DEBUG
1238 if (display) {
1239 bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40;
1240 *buf = kmalloc(bufsz, GFP_KERNEL);
1241 if (!*buf)
1242 return -ENOMEM;
1243 pos +=
1244 scnprintf(*buf + pos, bufsz - pos, "FH register values:\n");
1245 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) {
1246 pos +=
1247 scnprintf(*buf + pos, bufsz - pos,
1248 " %34s: 0X%08x\n",
1249 il4965_get_fh_string(fh_tbl[i]),
1250 il_rd(il, fh_tbl[i]));
1251 }
1252 return pos;
1253 }
1254#endif
1255 IL_ERR("FH register values:\n");
1256 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) {
1257 IL_ERR(" %34s: 0X%08x\n", il4965_get_fh_string(fh_tbl[i]),
1258 il_rd(il, fh_tbl[i]));
1259 }
1260 return 0;
1261}
1262
1263static void
1264il4965_hdl_missed_beacon(struct il_priv *il, struct il_rx_buf *rxb)
1265{
1266 struct il_rx_pkt *pkt = rxb_addr(rxb);
1267 struct il_missed_beacon_notif *missed_beacon;
1268
1269 missed_beacon = &pkt->u.missed_beacon;
1270 if (le32_to_cpu(missed_beacon->consecutive_missed_beacons) >
1271 il->missed_beacon_threshold) {
1272 D_CALIB("missed bcn cnsq %d totl %d rcd %d expctd %d\n",
1273 le32_to_cpu(missed_beacon->consecutive_missed_beacons),
1274 le32_to_cpu(missed_beacon->total_missed_becons),
1275 le32_to_cpu(missed_beacon->num_recvd_beacons),
1276 le32_to_cpu(missed_beacon->num_expected_beacons));
1277 if (!test_bit(S_SCANNING, &il->status))
1278 il4965_init_sensitivity(il);
1279 }
1280}
1281
1282/* Calculate noise level, based on measurements during network silence just
1283 * before arriving beacon. This measurement can be done only if we know
1284 * exactly when to expect beacons, therefore only when we're associated. */
1285static void
1286il4965_rx_calc_noise(struct il_priv *il)
1287{
1288 struct stats_rx_non_phy *rx_info;
1289 int num_active_rx = 0;
1290 int total_silence = 0;
1291 int bcn_silence_a, bcn_silence_b, bcn_silence_c;
1292 int last_rx_noise;
1293
1294 rx_info = &(il->_4965.stats.rx.general);
1295 bcn_silence_a =
1296 le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER;
1297 bcn_silence_b =
1298 le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER;
1299 bcn_silence_c =
1300 le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER;
1301
1302 if (bcn_silence_a) {
1303 total_silence += bcn_silence_a;
1304 num_active_rx++;
1305 }
1306 if (bcn_silence_b) {
1307 total_silence += bcn_silence_b;
1308 num_active_rx++;
1309 }
1310 if (bcn_silence_c) {
1311 total_silence += bcn_silence_c;
1312 num_active_rx++;
1313 }
1314
1315 /* Average among active antennas */
1316 if (num_active_rx)
1317 last_rx_noise = (total_silence / num_active_rx) - 107;
1318 else
1319 last_rx_noise = IL_NOISE_MEAS_NOT_AVAILABLE;
1320
1321 D_CALIB("inband silence a %u, b %u, c %u, dBm %d\n", bcn_silence_a,
1322 bcn_silence_b, bcn_silence_c, last_rx_noise);
1323}
1324
1325#ifdef CONFIG_IWLEGACY_DEBUGFS
1326/*
1327 * based on the assumption of all stats counter are in DWORD
1328 * FIXME: This function is for debugging, do not deal with
1329 * the case of counters roll-over.
1330 */
1331static void
1332il4965_accumulative_stats(struct il_priv *il, __le32 * stats)
1333{
1334 int i, size;
1335 __le32 *prev_stats;
1336 u32 *accum_stats;
1337 u32 *delta, *max_delta;
1338 struct stats_general_common *general, *accum_general;
1339 struct stats_tx *tx, *accum_tx;
1340
1341 prev_stats = (__le32 *) &il->_4965.stats;
1342 accum_stats = (u32 *) &il->_4965.accum_stats;
1343 size = sizeof(struct il_notif_stats);
1344 general = &il->_4965.stats.general.common;
1345 accum_general = &il->_4965.accum_stats.general.common;
1346 tx = &il->_4965.stats.tx;
1347 accum_tx = &il->_4965.accum_stats.tx;
1348 delta = (u32 *) &il->_4965.delta_stats;
1349 max_delta = (u32 *) &il->_4965.max_delta;
1350
1351 for (i = sizeof(__le32); i < size;
1352 i +=
1353 sizeof(__le32), stats++, prev_stats++, delta++, max_delta++,
1354 accum_stats++) {
1355 if (le32_to_cpu(*stats) > le32_to_cpu(*prev_stats)) {
1356 *delta =
1357 (le32_to_cpu(*stats) - le32_to_cpu(*prev_stats));
1358 *accum_stats += *delta;
1359 if (*delta > *max_delta)
1360 *max_delta = *delta;
1361 }
1362 }
1363
1364 /* reset accumulative stats for "no-counter" type stats */
1365 accum_general->temperature = general->temperature;
1366 accum_general->ttl_timestamp = general->ttl_timestamp;
1367}
1368#endif
1369
1370static void
1371il4965_hdl_stats(struct il_priv *il, struct il_rx_buf *rxb)
1372{
1373 const int recalib_seconds = 60;
1374 bool change;
1375 struct il_rx_pkt *pkt = rxb_addr(rxb);
1376
1377 D_RX("Statistics notification received (%d vs %d).\n",
1378 (int)sizeof(struct il_notif_stats),
1379 le32_to_cpu(pkt->len_n_flags) & IL_RX_FRAME_SIZE_MSK);
1380
1381 change =
1382 ((il->_4965.stats.general.common.temperature !=
1383 pkt->u.stats.general.common.temperature) ||
1384 ((il->_4965.stats.flag & STATS_REPLY_FLG_HT40_MODE_MSK) !=
1385 (pkt->u.stats.flag & STATS_REPLY_FLG_HT40_MODE_MSK)));
1386#ifdef CONFIG_IWLEGACY_DEBUGFS
1387 il4965_accumulative_stats(il, (__le32 *) &pkt->u.stats);
1388#endif
1389
1390 /* TODO: reading some of stats is unneeded */
1391 memcpy(&il->_4965.stats, &pkt->u.stats, sizeof(il->_4965.stats));
1392
1393 set_bit(S_STATS, &il->status);
1394
1395 /*
1396 * Reschedule the stats timer to occur in recalib_seconds to ensure
1397 * we get a thermal update even if the uCode doesn't give us one
1398 */
1399 mod_timer(&il->stats_periodic,
1400 jiffies + msecs_to_jiffies(recalib_seconds * 1000));
1401
1402 if (unlikely(!test_bit(S_SCANNING, &il->status)) &&
1403 (pkt->hdr.cmd == N_STATS)) {
1404 il4965_rx_calc_noise(il);
1405 queue_work(il->workqueue, &il->run_time_calib_work);
1406 }
1407
1408 if (change)
1409 il4965_temperature_calib(il);
1410}
1411
1412static void
1413il4965_hdl_c_stats(struct il_priv *il, struct il_rx_buf *rxb)
1414{
1415 struct il_rx_pkt *pkt = rxb_addr(rxb);
1416
1417 if (le32_to_cpu(pkt->u.stats.flag) & UCODE_STATS_CLEAR_MSK) {
1418#ifdef CONFIG_IWLEGACY_DEBUGFS
1419 memset(&il->_4965.accum_stats, 0,
1420 sizeof(struct il_notif_stats));
1421 memset(&il->_4965.delta_stats, 0,
1422 sizeof(struct il_notif_stats));
1423 memset(&il->_4965.max_delta, 0, sizeof(struct il_notif_stats));
1424#endif
1425 D_RX("Statistics have been cleared\n");
1426 }
1427 il4965_hdl_stats(il, rxb);
1428}
1429
1430
1431/*
1432 * mac80211 queues, ACs, hardware queues, FIFOs.
1433 *
1434 * Cf. http://wireless.kernel.org/en/developers/Documentation/mac80211/queues
1435 *
1436 * Mac80211 uses the following numbers, which we get as from it
1437 * by way of skb_get_queue_mapping(skb):
1438 *
1439 * VO 0
1440 * VI 1
1441 * BE 2
1442 * BK 3
1443 *
1444 *
1445 * Regular (not A-MPDU) frames are put into hardware queues corresponding
1446 * to the FIFOs, see comments in iwl-prph.h. Aggregated frames get their
1447 * own queue per aggregation session (RA/TID combination), such queues are
1448 * set up to map into FIFOs too, for which we need an AC->FIFO mapping. In
1449 * order to map frames to the right queue, we also need an AC->hw queue
1450 * mapping. This is implemented here.
1451 *
1452 * Due to the way hw queues are set up (by the hw specific modules like
1453 * 4965.c), the AC->hw queue mapping is the identity
1454 * mapping.
1455 */
1456
1457static const u8 tid_to_ac[] = {
1458 IEEE80211_AC_BE,
1459 IEEE80211_AC_BK,
1460 IEEE80211_AC_BK,
1461 IEEE80211_AC_BE,
1462 IEEE80211_AC_VI,
1463 IEEE80211_AC_VI,
1464 IEEE80211_AC_VO,
1465 IEEE80211_AC_VO
1466};
1467
1468static inline int
1469il4965_get_ac_from_tid(u16 tid)
1470{
1471 if (likely(tid < ARRAY_SIZE(tid_to_ac)))
1472 return tid_to_ac[tid];
1473
1474 /* no support for TIDs 8-15 yet */
1475 return -EINVAL;
1476}
1477
1478static inline int
1479il4965_get_fifo_from_tid(u16 tid)
1480{
1481 const u8 ac_to_fifo[] = {
1482 IL_TX_FIFO_VO,
1483 IL_TX_FIFO_VI,
1484 IL_TX_FIFO_BE,
1485 IL_TX_FIFO_BK,
1486 };
1487
1488 if (likely(tid < ARRAY_SIZE(tid_to_ac)))
1489 return ac_to_fifo[tid_to_ac[tid]];
1490
1491 /* no support for TIDs 8-15 yet */
1492 return -EINVAL;
1493}
1494
1495/*
1496 * handle build C_TX command notification.
1497 */
1498static void
1499il4965_tx_cmd_build_basic(struct il_priv *il, struct sk_buff *skb,
1500 struct il_tx_cmd *tx_cmd,
1501 struct ieee80211_tx_info *info,
1502 struct ieee80211_hdr *hdr, u8 std_id)
1503{
1504 __le16 fc = hdr->frame_control;
1505 __le32 tx_flags = tx_cmd->tx_flags;
1506
1507 tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
1508 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
1509 tx_flags |= TX_CMD_FLG_ACK_MSK;
1510 if (ieee80211_is_mgmt(fc))
1511 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
1512 if (ieee80211_is_probe_resp(fc) &&
1513 !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
1514 tx_flags |= TX_CMD_FLG_TSF_MSK;
1515 } else {
1516 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
1517 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
1518 }
1519
1520 if (ieee80211_is_back_req(fc))
1521 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK;
1522
1523 tx_cmd->sta_id = std_id;
1524 if (ieee80211_has_morefrags(fc))
1525 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
1526
1527 if (ieee80211_is_data_qos(fc)) {
1528 u8 *qc = ieee80211_get_qos_ctl(hdr);
1529 tx_cmd->tid_tspec = qc[0] & 0xf;
1530 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
1531 } else {
1532 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
1533 }
1534
1535 il_tx_cmd_protection(il, info, fc, &tx_flags);
1536
1537 tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
1538 if (ieee80211_is_mgmt(fc)) {
1539 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
1540 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
1541 else
1542 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
1543 } else {
1544 tx_cmd->timeout.pm_frame_timeout = 0;
1545 }
1546
1547 tx_cmd->driver_txop = 0;
1548 tx_cmd->tx_flags = tx_flags;
1549 tx_cmd->next_frame_len = 0;
1550}
1551
1552static void
1553il4965_tx_cmd_build_rate(struct il_priv *il,
1554 struct il_tx_cmd *tx_cmd,
1555 struct ieee80211_tx_info *info,
1556 struct ieee80211_sta *sta,
1557 __le16 fc)
1558{
1559 const u8 rts_retry_limit = 60;
1560 u32 rate_flags;
1561 int rate_idx;
1562 u8 data_retry_limit;
1563 u8 rate_plcp;
1564
1565 /* Set retry limit on DATA packets and Probe Responses */
1566 if (ieee80211_is_probe_resp(fc))
1567 data_retry_limit = 3;
1568 else
1569 data_retry_limit = IL4965_DEFAULT_TX_RETRY;
1570 tx_cmd->data_retry_limit = data_retry_limit;
1571 /* Set retry limit on RTS packets */
1572 tx_cmd->rts_retry_limit = min(data_retry_limit, rts_retry_limit);
1573
1574 /* DATA packets will use the uCode station table for rate/antenna
1575 * selection */
1576 if (ieee80211_is_data(fc)) {
1577 tx_cmd->initial_rate_idx = 0;
1578 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
1579 return;
1580 }
1581
1582 /**
1583 * If the current TX rate stored in mac80211 has the MCS bit set, it's
1584 * not really a TX rate. Thus, we use the lowest supported rate for
1585 * this band. Also use the lowest supported rate if the stored rate
1586 * idx is invalid.
1587 */
1588 rate_idx = info->control.rates[0].idx;
1589 if ((info->control.rates[0].flags & IEEE80211_TX_RC_MCS) || rate_idx < 0
1590 || rate_idx > RATE_COUNT_LEGACY)
1591 rate_idx = rate_lowest_index(&il->bands[info->band], sta);
1592 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
1593 if (info->band == IEEE80211_BAND_5GHZ)
1594 rate_idx += IL_FIRST_OFDM_RATE;
1595 /* Get PLCP rate for tx_cmd->rate_n_flags */
1596 rate_plcp = il_rates[rate_idx].plcp;
1597 /* Zero out flags for this packet */
1598 rate_flags = 0;
1599
1600 /* Set CCK flag as needed */
1601 if (rate_idx >= IL_FIRST_CCK_RATE && rate_idx <= IL_LAST_CCK_RATE)
1602 rate_flags |= RATE_MCS_CCK_MSK;
1603
1604 /* Set up antennas */
1605 il4965_toggle_tx_ant(il, &il->mgmt_tx_ant, il->hw_params.valid_tx_ant);
1606 rate_flags |= BIT(il->mgmt_tx_ant) << RATE_MCS_ANT_POS;
1607
1608 /* Set the rate in the TX cmd */
1609 tx_cmd->rate_n_flags = cpu_to_le32(rate_plcp | rate_flags);
1610}
1611
1612static void
1613il4965_tx_cmd_build_hwcrypto(struct il_priv *il, struct ieee80211_tx_info *info,
1614 struct il_tx_cmd *tx_cmd, struct sk_buff *skb_frag,
1615 int sta_id)
1616{
1617 struct ieee80211_key_conf *keyconf = info->control.hw_key;
1618
1619 switch (keyconf->cipher) {
1620 case WLAN_CIPHER_SUITE_CCMP:
1621 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
1622 memcpy(tx_cmd->key, keyconf->key, keyconf->keylen);
1623 if (info->flags & IEEE80211_TX_CTL_AMPDU)
1624 tx_cmd->tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
1625 D_TX("tx_cmd with AES hwcrypto\n");
1626 break;
1627
1628 case WLAN_CIPHER_SUITE_TKIP:
1629 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
1630 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
1631 D_TX("tx_cmd with tkip hwcrypto\n");
1632 break;
1633
1634 case WLAN_CIPHER_SUITE_WEP104:
1635 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
1636 /* fall through */
1637 case WLAN_CIPHER_SUITE_WEP40:
1638 tx_cmd->sec_ctl |=
1639 (TX_CMD_SEC_WEP | (keyconf->keyidx & TX_CMD_SEC_MSK) <<
1640 TX_CMD_SEC_SHIFT);
1641
1642 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
1643
1644 D_TX("Configuring packet for WEP encryption " "with key %d\n",
1645 keyconf->keyidx);
1646 break;
1647
1648 default:
1649 IL_ERR("Unknown encode cipher %x\n", keyconf->cipher);
1650 break;
1651 }
1652}
1653
1654/*
1655 * start C_TX command process
1656 */
1657int
1658il4965_tx_skb(struct il_priv *il,
1659 struct ieee80211_sta *sta,
1660 struct sk_buff *skb)
1661{
1662 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1663 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1664 struct il_station_priv *sta_priv = NULL;
1665 struct il_tx_queue *txq;
1666 struct il_queue *q;
1667 struct il_device_cmd *out_cmd;
1668 struct il_cmd_meta *out_meta;
1669 struct il_tx_cmd *tx_cmd;
1670 int txq_id;
1671 dma_addr_t phys_addr;
1672 dma_addr_t txcmd_phys;
1673 dma_addr_t scratch_phys;
1674 u16 len, firstlen, secondlen;
1675 u16 seq_number = 0;
1676 __le16 fc;
1677 u8 hdr_len;
1678 u8 sta_id;
1679 u8 wait_write_ptr = 0;
1680 u8 tid = 0;
1681 u8 *qc = NULL;
1682 unsigned long flags;
1683 bool is_agg = false;
1684
1685 spin_lock_irqsave(&il->lock, flags);
1686 if (il_is_rfkill(il)) {
1687 D_DROP("Dropping - RF KILL\n");
1688 goto drop_unlock;
1689 }
1690
1691 fc = hdr->frame_control;
1692
1693#ifdef CONFIG_IWLEGACY_DEBUG
1694 if (ieee80211_is_auth(fc))
1695 D_TX("Sending AUTH frame\n");
1696 else if (ieee80211_is_assoc_req(fc))
1697 D_TX("Sending ASSOC frame\n");
1698 else if (ieee80211_is_reassoc_req(fc))
1699 D_TX("Sending REASSOC frame\n");
1700#endif
1701
1702 hdr_len = ieee80211_hdrlen(fc);
1703
1704 /* For management frames use broadcast id to do not break aggregation */
1705 if (!ieee80211_is_data(fc))
1706 sta_id = il->hw_params.bcast_id;
1707 else {
1708 /* Find idx into station table for destination station */
1709 sta_id = il_sta_id_or_broadcast(il, sta);
1710
1711 if (sta_id == IL_INVALID_STATION) {
1712 D_DROP("Dropping - INVALID STATION: %pM\n", hdr->addr1);
1713 goto drop_unlock;
1714 }
1715 }
1716
1717 D_TX("station Id %d\n", sta_id);
1718
1719 if (sta)
1720 sta_priv = (void *)sta->drv_priv;
1721
1722 if (sta_priv && sta_priv->asleep &&
1723 (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER)) {
1724 /*
1725 * This sends an asynchronous command to the device,
1726 * but we can rely on it being processed before the
1727 * next frame is processed -- and the next frame to
1728 * this station is the one that will consume this
1729 * counter.
1730 * For now set the counter to just 1 since we do not
1731 * support uAPSD yet.
1732 */
1733 il4965_sta_modify_sleep_tx_count(il, sta_id, 1);
1734 }
1735
1736 /* FIXME: remove me ? */
1737 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
1738
1739 /* Access category (AC) is also the queue number */
1740 txq_id = skb_get_queue_mapping(skb);
1741
1742 /* irqs already disabled/saved above when locking il->lock */
1743 spin_lock(&il->sta_lock);
1744
1745 if (ieee80211_is_data_qos(fc)) {
1746 qc = ieee80211_get_qos_ctl(hdr);
1747 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
1748 if (WARN_ON_ONCE(tid >= MAX_TID_COUNT)) {
1749 spin_unlock(&il->sta_lock);
1750 goto drop_unlock;
1751 }
1752 seq_number = il->stations[sta_id].tid[tid].seq_number;
1753 seq_number &= IEEE80211_SCTL_SEQ;
1754 hdr->seq_ctrl =
1755 hdr->seq_ctrl & cpu_to_le16(IEEE80211_SCTL_FRAG);
1756 hdr->seq_ctrl |= cpu_to_le16(seq_number);
1757 seq_number += 0x10;
1758 /* aggregation is on for this <sta,tid> */
1759 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
1760 il->stations[sta_id].tid[tid].agg.state == IL_AGG_ON) {
1761 txq_id = il->stations[sta_id].tid[tid].agg.txq_id;
1762 is_agg = true;
1763 }
1764 }
1765
1766 txq = &il->txq[txq_id];
1767 q = &txq->q;
1768
1769 if (unlikely(il_queue_space(q) < q->high_mark)) {
1770 spin_unlock(&il->sta_lock);
1771 goto drop_unlock;
1772 }
1773
1774 if (ieee80211_is_data_qos(fc)) {
1775 il->stations[sta_id].tid[tid].tfds_in_queue++;
1776 if (!ieee80211_has_morefrags(fc))
1777 il->stations[sta_id].tid[tid].seq_number = seq_number;
1778 }
1779
1780 spin_unlock(&il->sta_lock);
1781
1782 txq->skbs[q->write_ptr] = skb;
1783
1784 /* Set up first empty entry in queue's array of Tx/cmd buffers */
1785 out_cmd = txq->cmd[q->write_ptr];
1786 out_meta = &txq->meta[q->write_ptr];
1787 tx_cmd = &out_cmd->cmd.tx;
1788 memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
1789 memset(tx_cmd, 0, sizeof(struct il_tx_cmd));
1790
1791 /*
1792 * Set up the Tx-command (not MAC!) header.
1793 * Store the chosen Tx queue and TFD idx within the sequence field;
1794 * after Tx, uCode's Tx response will return this value so driver can
1795 * locate the frame within the tx queue and do post-tx processing.
1796 */
1797 out_cmd->hdr.cmd = C_TX;
1798 out_cmd->hdr.sequence =
1799 cpu_to_le16((u16)
1800 (QUEUE_TO_SEQ(txq_id) | IDX_TO_SEQ(q->write_ptr)));
1801
1802 /* Copy MAC header from skb into command buffer */
1803 memcpy(tx_cmd->hdr, hdr, hdr_len);
1804
1805 /* Total # bytes to be transmitted */
1806 tx_cmd->len = cpu_to_le16((u16) skb->len);
1807
1808 if (info->control.hw_key)
1809 il4965_tx_cmd_build_hwcrypto(il, info, tx_cmd, skb, sta_id);
1810
1811 /* TODO need this for burst mode later on */
1812 il4965_tx_cmd_build_basic(il, skb, tx_cmd, info, hdr, sta_id);
1813
1814 il4965_tx_cmd_build_rate(il, tx_cmd, info, sta, fc);
1815
1816 /*
1817 * Use the first empty entry in this queue's command buffer array
1818 * to contain the Tx command and MAC header concatenated together
1819 * (payload data will be in another buffer).
1820 * Size of this varies, due to varying MAC header length.
1821 * If end is not dword aligned, we'll have 2 extra bytes at the end
1822 * of the MAC header (device reads on dword boundaries).
1823 * We'll tell device about this padding later.
1824 */
1825 len = sizeof(struct il_tx_cmd) + sizeof(struct il_cmd_header) + hdr_len;
1826 firstlen = (len + 3) & ~3;
1827
1828 /* Tell NIC about any 2-byte padding after MAC header */
1829 if (firstlen != len)
1830 tx_cmd->tx_flags |= TX_CMD_FLG_MH_PAD_MSK;
1831
1832 /* Physical address of this Tx command's header (not MAC header!),
1833 * within command buffer array. */
1834 txcmd_phys =
1835 pci_map_single(il->pci_dev, &out_cmd->hdr, firstlen,
1836 PCI_DMA_BIDIRECTIONAL);
1837 if (unlikely(pci_dma_mapping_error(il->pci_dev, txcmd_phys)))
1838 goto drop_unlock;
1839
1840 /* Set up TFD's 2nd entry to point directly to remainder of skb,
1841 * if any (802.11 null frames have no payload). */
1842 secondlen = skb->len - hdr_len;
1843 if (secondlen > 0) {
1844 phys_addr =
1845 pci_map_single(il->pci_dev, skb->data + hdr_len, secondlen,
1846 PCI_DMA_TODEVICE);
1847 if (unlikely(pci_dma_mapping_error(il->pci_dev, phys_addr)))
1848 goto drop_unlock;
1849 }
1850
1851 /* Add buffer containing Tx command and MAC(!) header to TFD's
1852 * first entry */
1853 il->ops->txq_attach_buf_to_tfd(il, txq, txcmd_phys, firstlen, 1, 0);
1854 dma_unmap_addr_set(out_meta, mapping, txcmd_phys);
1855 dma_unmap_len_set(out_meta, len, firstlen);
1856 if (secondlen)
1857 il->ops->txq_attach_buf_to_tfd(il, txq, phys_addr, secondlen,
1858 0, 0);
1859
1860 if (!ieee80211_has_morefrags(hdr->frame_control)) {
1861 txq->need_update = 1;
1862 } else {
1863 wait_write_ptr = 1;
1864 txq->need_update = 0;
1865 }
1866
1867 scratch_phys =
1868 txcmd_phys + sizeof(struct il_cmd_header) +
1869 offsetof(struct il_tx_cmd, scratch);
1870
1871 /* take back ownership of DMA buffer to enable update */
1872 pci_dma_sync_single_for_cpu(il->pci_dev, txcmd_phys, firstlen,
1873 PCI_DMA_BIDIRECTIONAL);
1874 tx_cmd->dram_lsb_ptr = cpu_to_le32(scratch_phys);
1875 tx_cmd->dram_msb_ptr = il_get_dma_hi_addr(scratch_phys);
1876
1877 il_update_stats(il, true, fc, skb->len);
1878
1879 D_TX("sequence nr = 0X%x\n", le16_to_cpu(out_cmd->hdr.sequence));
1880 D_TX("tx_flags = 0X%x\n", le32_to_cpu(tx_cmd->tx_flags));
1881 il_print_hex_dump(il, IL_DL_TX, (u8 *) tx_cmd, sizeof(*tx_cmd));
1882 il_print_hex_dump(il, IL_DL_TX, (u8 *) tx_cmd->hdr, hdr_len);
1883
1884 /* Set up entry for this TFD in Tx byte-count array */
1885 if (info->flags & IEEE80211_TX_CTL_AMPDU)
1886 il->ops->txq_update_byte_cnt_tbl(il, txq, le16_to_cpu(tx_cmd->len));
1887
1888 pci_dma_sync_single_for_device(il->pci_dev, txcmd_phys, firstlen,
1889 PCI_DMA_BIDIRECTIONAL);
1890
1891 /* Tell device the write idx *just past* this latest filled TFD */
1892 q->write_ptr = il_queue_inc_wrap(q->write_ptr, q->n_bd);
1893 il_txq_update_write_ptr(il, txq);
1894 spin_unlock_irqrestore(&il->lock, flags);
1895
1896 /*
1897 * At this point the frame is "transmitted" successfully
1898 * and we will get a TX status notification eventually,
1899 * regardless of the value of ret. "ret" only indicates
1900 * whether or not we should update the write pointer.
1901 */
1902
1903 /*
1904 * Avoid atomic ops if it isn't an associated client.
1905 * Also, if this is a packet for aggregation, don't
1906 * increase the counter because the ucode will stop
1907 * aggregation queues when their respective station
1908 * goes to sleep.
1909 */
1910 if (sta_priv && sta_priv->client && !is_agg)
1911 atomic_inc(&sta_priv->pending_frames);
1912
1913 if (il_queue_space(q) < q->high_mark && il->mac80211_registered) {
1914 if (wait_write_ptr) {
1915 spin_lock_irqsave(&il->lock, flags);
1916 txq->need_update = 1;
1917 il_txq_update_write_ptr(il, txq);
1918 spin_unlock_irqrestore(&il->lock, flags);
1919 } else {
1920 il_stop_queue(il, txq);
1921 }
1922 }
1923
1924 return 0;
1925
1926drop_unlock:
1927 spin_unlock_irqrestore(&il->lock, flags);
1928 return -1;
1929}
1930
1931static inline int
1932il4965_alloc_dma_ptr(struct il_priv *il, struct il_dma_ptr *ptr, size_t size)
1933{
1934 ptr->addr = dma_alloc_coherent(&il->pci_dev->dev, size, &ptr->dma,
1935 GFP_KERNEL);
1936 if (!ptr->addr)
1937 return -ENOMEM;
1938 ptr->size = size;
1939 return 0;
1940}
1941
1942static inline void
1943il4965_free_dma_ptr(struct il_priv *il, struct il_dma_ptr *ptr)
1944{
1945 if (unlikely(!ptr->addr))
1946 return;
1947
1948 dma_free_coherent(&il->pci_dev->dev, ptr->size, ptr->addr, ptr->dma);
1949 memset(ptr, 0, sizeof(*ptr));
1950}
1951
1952/**
1953 * il4965_hw_txq_ctx_free - Free TXQ Context
1954 *
1955 * Destroy all TX DMA queues and structures
1956 */
1957void
1958il4965_hw_txq_ctx_free(struct il_priv *il)
1959{
1960 int txq_id;
1961
1962 /* Tx queues */
1963 if (il->txq) {
1964 for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++)
1965 if (txq_id == il->cmd_queue)
1966 il_cmd_queue_free(il);
1967 else
1968 il_tx_queue_free(il, txq_id);
1969 }
1970 il4965_free_dma_ptr(il, &il->kw);
1971
1972 il4965_free_dma_ptr(il, &il->scd_bc_tbls);
1973
1974 /* free tx queue structure */
1975 il_free_txq_mem(il);
1976}
1977
1978/**
1979 * il4965_txq_ctx_alloc - allocate TX queue context
1980 * Allocate all Tx DMA structures and initialize them
1981 *
1982 * @param il
1983 * @return error code
1984 */
1985int
1986il4965_txq_ctx_alloc(struct il_priv *il)
1987{
1988 int ret, txq_id;
1989 unsigned long flags;
1990
1991 /* Free all tx/cmd queues and keep-warm buffer */
1992 il4965_hw_txq_ctx_free(il);
1993
1994 ret =
1995 il4965_alloc_dma_ptr(il, &il->scd_bc_tbls,
1996 il->hw_params.scd_bc_tbls_size);
1997 if (ret) {
1998 IL_ERR("Scheduler BC Table allocation failed\n");
1999 goto error_bc_tbls;
2000 }
2001 /* Alloc keep-warm buffer */
2002 ret = il4965_alloc_dma_ptr(il, &il->kw, IL_KW_SIZE);
2003 if (ret) {
2004 IL_ERR("Keep Warm allocation failed\n");
2005 goto error_kw;
2006 }
2007
2008 /* allocate tx queue structure */
2009 ret = il_alloc_txq_mem(il);
2010 if (ret)
2011 goto error;
2012
2013 spin_lock_irqsave(&il->lock, flags);
2014
2015 /* Turn off all Tx DMA fifos */
2016 il4965_txq_set_sched(il, 0);
2017
2018 /* Tell NIC where to find the "keep warm" buffer */
2019 il_wr(il, FH49_KW_MEM_ADDR_REG, il->kw.dma >> 4);
2020
2021 spin_unlock_irqrestore(&il->lock, flags);
2022
2023 /* Alloc and init all Tx queues, including the command queue (#4/#9) */
2024 for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++) {
2025 ret = il_tx_queue_init(il, txq_id);
2026 if (ret) {
2027 IL_ERR("Tx %d queue init failed\n", txq_id);
2028 goto error;
2029 }
2030 }
2031
2032 return ret;
2033
2034error:
2035 il4965_hw_txq_ctx_free(il);
2036 il4965_free_dma_ptr(il, &il->kw);
2037error_kw:
2038 il4965_free_dma_ptr(il, &il->scd_bc_tbls);
2039error_bc_tbls:
2040 return ret;
2041}
2042
2043void
2044il4965_txq_ctx_reset(struct il_priv *il)
2045{
2046 int txq_id;
2047 unsigned long flags;
2048
2049 spin_lock_irqsave(&il->lock, flags);
2050
2051 /* Turn off all Tx DMA fifos */
2052 il4965_txq_set_sched(il, 0);
2053 /* Tell NIC where to find the "keep warm" buffer */
2054 il_wr(il, FH49_KW_MEM_ADDR_REG, il->kw.dma >> 4);
2055
2056 spin_unlock_irqrestore(&il->lock, flags);
2057
2058 /* Alloc and init all Tx queues, including the command queue (#4) */
2059 for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++)
2060 il_tx_queue_reset(il, txq_id);
2061}
2062
2063static void
2064il4965_txq_ctx_unmap(struct il_priv *il)
2065{
2066 int txq_id;
2067
2068 if (!il->txq)
2069 return;
2070
2071 /* Unmap DMA from host system and free skb's */
2072 for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++)
2073 if (txq_id == il->cmd_queue)
2074 il_cmd_queue_unmap(il);
2075 else
2076 il_tx_queue_unmap(il, txq_id);
2077}
2078
2079/**
2080 * il4965_txq_ctx_stop - Stop all Tx DMA channels
2081 */
2082void
2083il4965_txq_ctx_stop(struct il_priv *il)
2084{
2085 int ch, ret;
2086
2087 _il_wr_prph(il, IL49_SCD_TXFACT, 0);
2088
2089 /* Stop each Tx DMA channel, and wait for it to be idle */
2090 for (ch = 0; ch < il->hw_params.dma_chnl_num; ch++) {
2091 _il_wr(il, FH49_TCSR_CHNL_TX_CONFIG_REG(ch), 0x0);
2092 ret =
2093 _il_poll_bit(il, FH49_TSSR_TX_STATUS_REG,
2094 FH49_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(ch),
2095 FH49_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(ch),
2096 1000);
2097 if (ret < 0)
2098 IL_ERR("Timeout stopping DMA channel %d [0x%08x]",
2099 ch, _il_rd(il, FH49_TSSR_TX_STATUS_REG));
2100 }
2101}
2102
2103/*
2104 * Find first available (lowest unused) Tx Queue, mark it "active".
2105 * Called only when finding queue for aggregation.
2106 * Should never return anything < 7, because they should already
2107 * be in use as EDCA AC (0-3), Command (4), reserved (5, 6)
2108 */
2109static int
2110il4965_txq_ctx_activate_free(struct il_priv *il)
2111{
2112 int txq_id;
2113
2114 for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++)
2115 if (!test_and_set_bit(txq_id, &il->txq_ctx_active_msk))
2116 return txq_id;
2117 return -1;
2118}
2119
2120/**
2121 * il4965_tx_queue_stop_scheduler - Stop queue, but keep configuration
2122 */
2123static void
2124il4965_tx_queue_stop_scheduler(struct il_priv *il, u16 txq_id)
2125{
2126 /* Simply stop the queue, but don't change any configuration;
2127 * the SCD_ACT_EN bit is the write-enable mask for the ACTIVE bit. */
2128 il_wr_prph(il, IL49_SCD_QUEUE_STATUS_BITS(txq_id),
2129 (0 << IL49_SCD_QUEUE_STTS_REG_POS_ACTIVE) |
2130 (1 << IL49_SCD_QUEUE_STTS_REG_POS_SCD_ACT_EN));
2131}
2132
2133/**
2134 * il4965_tx_queue_set_q2ratid - Map unique receiver/tid combination to a queue
2135 */
2136static int
2137il4965_tx_queue_set_q2ratid(struct il_priv *il, u16 ra_tid, u16 txq_id)
2138{
2139 u32 tbl_dw_addr;
2140 u32 tbl_dw;
2141 u16 scd_q2ratid;
2142
2143 scd_q2ratid = ra_tid & IL_SCD_QUEUE_RA_TID_MAP_RATID_MSK;
2144
2145 tbl_dw_addr =
2146 il->scd_base_addr + IL49_SCD_TRANSLATE_TBL_OFFSET_QUEUE(txq_id);
2147
2148 tbl_dw = il_read_targ_mem(il, tbl_dw_addr);
2149
2150 if (txq_id & 0x1)
2151 tbl_dw = (scd_q2ratid << 16) | (tbl_dw & 0x0000FFFF);
2152 else
2153 tbl_dw = scd_q2ratid | (tbl_dw & 0xFFFF0000);
2154
2155 il_write_targ_mem(il, tbl_dw_addr, tbl_dw);
2156
2157 return 0;
2158}
2159
2160/**
2161 * il4965_tx_queue_agg_enable - Set up & enable aggregation for selected queue
2162 *
2163 * NOTE: txq_id must be greater than IL49_FIRST_AMPDU_QUEUE,
2164 * i.e. it must be one of the higher queues used for aggregation
2165 */
2166static int
2167il4965_txq_agg_enable(struct il_priv *il, int txq_id, int tx_fifo, int sta_id,
2168 int tid, u16 ssn_idx)
2169{
2170 unsigned long flags;
2171 u16 ra_tid;
2172 int ret;
2173
2174 if ((IL49_FIRST_AMPDU_QUEUE > txq_id) ||
2175 (IL49_FIRST_AMPDU_QUEUE +
2176 il->cfg->num_of_ampdu_queues <= txq_id)) {
2177 IL_WARN("queue number out of range: %d, must be %d to %d\n",
2178 txq_id, IL49_FIRST_AMPDU_QUEUE,
2179 IL49_FIRST_AMPDU_QUEUE +
2180 il->cfg->num_of_ampdu_queues - 1);
2181 return -EINVAL;
2182 }
2183
2184 ra_tid = BUILD_RAxTID(sta_id, tid);
2185
2186 /* Modify device's station table to Tx this TID */
2187 ret = il4965_sta_tx_modify_enable_tid(il, sta_id, tid);
2188 if (ret)
2189 return ret;
2190
2191 spin_lock_irqsave(&il->lock, flags);
2192
2193 /* Stop this Tx queue before configuring it */
2194 il4965_tx_queue_stop_scheduler(il, txq_id);
2195
2196 /* Map receiver-address / traffic-ID to this queue */
2197 il4965_tx_queue_set_q2ratid(il, ra_tid, txq_id);
2198
2199 /* Set this queue as a chain-building queue */
2200 il_set_bits_prph(il, IL49_SCD_QUEUECHAIN_SEL, (1 << txq_id));
2201
2202 /* Place first TFD at idx corresponding to start sequence number.
2203 * Assumes that ssn_idx is valid (!= 0xFFF) */
2204 il->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
2205 il->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
2206 il4965_set_wr_ptrs(il, txq_id, ssn_idx);
2207
2208 /* Set up Tx win size and frame limit for this queue */
2209 il_write_targ_mem(il,
2210 il->scd_base_addr +
2211 IL49_SCD_CONTEXT_QUEUE_OFFSET(txq_id),
2212 (SCD_WIN_SIZE << IL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_POS)
2213 & IL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
2214
2215 il_write_targ_mem(il,
2216 il->scd_base_addr +
2217 IL49_SCD_CONTEXT_QUEUE_OFFSET(txq_id) + sizeof(u32),
2218 (SCD_FRAME_LIMIT <<
2219 IL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) &
2220 IL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
2221
2222 il_set_bits_prph(il, IL49_SCD_INTERRUPT_MASK, (1 << txq_id));
2223
2224 /* Set up Status area in SRAM, map to Tx DMA/FIFO, activate the queue */
2225 il4965_tx_queue_set_status(il, &il->txq[txq_id], tx_fifo, 1);
2226
2227 spin_unlock_irqrestore(&il->lock, flags);
2228
2229 return 0;
2230}
2231
2232int
2233il4965_tx_agg_start(struct il_priv *il, struct ieee80211_vif *vif,
2234 struct ieee80211_sta *sta, u16 tid, u16 * ssn)
2235{
2236 int sta_id;
2237 int tx_fifo;
2238 int txq_id;
2239 int ret;
2240 unsigned long flags;
2241 struct il_tid_data *tid_data;
2242
2243 /* FIXME: warning if tx fifo not found ? */
2244 tx_fifo = il4965_get_fifo_from_tid(tid);
2245 if (unlikely(tx_fifo < 0))
2246 return tx_fifo;
2247
2248 D_HT("%s on ra = %pM tid = %d\n", __func__, sta->addr, tid);
2249
2250 sta_id = il_sta_id(sta);
2251 if (sta_id == IL_INVALID_STATION) {
2252 IL_ERR("Start AGG on invalid station\n");
2253 return -ENXIO;
2254 }
2255 if (unlikely(tid >= MAX_TID_COUNT))
2256 return -EINVAL;
2257
2258 if (il->stations[sta_id].tid[tid].agg.state != IL_AGG_OFF) {
2259 IL_ERR("Start AGG when state is not IL_AGG_OFF !\n");
2260 return -ENXIO;
2261 }
2262
2263 txq_id = il4965_txq_ctx_activate_free(il);
2264 if (txq_id == -1) {
2265 IL_ERR("No free aggregation queue available\n");
2266 return -ENXIO;
2267 }
2268
2269 spin_lock_irqsave(&il->sta_lock, flags);
2270 tid_data = &il->stations[sta_id].tid[tid];
2271 *ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
2272 tid_data->agg.txq_id = txq_id;
2273 il_set_swq_id(&il->txq[txq_id], il4965_get_ac_from_tid(tid), txq_id);
2274 spin_unlock_irqrestore(&il->sta_lock, flags);
2275
2276 ret = il4965_txq_agg_enable(il, txq_id, tx_fifo, sta_id, tid, *ssn);
2277 if (ret)
2278 return ret;
2279
2280 spin_lock_irqsave(&il->sta_lock, flags);
2281 tid_data = &il->stations[sta_id].tid[tid];
2282 if (tid_data->tfds_in_queue == 0) {
2283 D_HT("HW queue is empty\n");
2284 tid_data->agg.state = IL_AGG_ON;
2285 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2286 } else {
2287 D_HT("HW queue is NOT empty: %d packets in HW queue\n",
2288 tid_data->tfds_in_queue);
2289 tid_data->agg.state = IL_EMPTYING_HW_QUEUE_ADDBA;
2290 }
2291 spin_unlock_irqrestore(&il->sta_lock, flags);
2292 return ret;
2293}
2294
2295/**
2296 * txq_id must be greater than IL49_FIRST_AMPDU_QUEUE
2297 * il->lock must be held by the caller
2298 */
2299static int
2300il4965_txq_agg_disable(struct il_priv *il, u16 txq_id, u16 ssn_idx, u8 tx_fifo)
2301{
2302 if ((IL49_FIRST_AMPDU_QUEUE > txq_id) ||
2303 (IL49_FIRST_AMPDU_QUEUE +
2304 il->cfg->num_of_ampdu_queues <= txq_id)) {
2305 IL_WARN("queue number out of range: %d, must be %d to %d\n",
2306 txq_id, IL49_FIRST_AMPDU_QUEUE,
2307 IL49_FIRST_AMPDU_QUEUE +
2308 il->cfg->num_of_ampdu_queues - 1);
2309 return -EINVAL;
2310 }
2311
2312 il4965_tx_queue_stop_scheduler(il, txq_id);
2313
2314 il_clear_bits_prph(il, IL49_SCD_QUEUECHAIN_SEL, (1 << txq_id));
2315
2316 il->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
2317 il->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
2318 /* supposes that ssn_idx is valid (!= 0xFFF) */
2319 il4965_set_wr_ptrs(il, txq_id, ssn_idx);
2320
2321 il_clear_bits_prph(il, IL49_SCD_INTERRUPT_MASK, (1 << txq_id));
2322 il_txq_ctx_deactivate(il, txq_id);
2323 il4965_tx_queue_set_status(il, &il->txq[txq_id], tx_fifo, 0);
2324
2325 return 0;
2326}
2327
2328int
2329il4965_tx_agg_stop(struct il_priv *il, struct ieee80211_vif *vif,
2330 struct ieee80211_sta *sta, u16 tid)
2331{
2332 int tx_fifo_id, txq_id, sta_id, ssn;
2333 struct il_tid_data *tid_data;
2334 int write_ptr, read_ptr;
2335 unsigned long flags;
2336
2337 /* FIXME: warning if tx_fifo_id not found ? */
2338 tx_fifo_id = il4965_get_fifo_from_tid(tid);
2339 if (unlikely(tx_fifo_id < 0))
2340 return tx_fifo_id;
2341
2342 sta_id = il_sta_id(sta);
2343
2344 if (sta_id == IL_INVALID_STATION) {
2345 IL_ERR("Invalid station for AGG tid %d\n", tid);
2346 return -ENXIO;
2347 }
2348
2349 spin_lock_irqsave(&il->sta_lock, flags);
2350
2351 tid_data = &il->stations[sta_id].tid[tid];
2352 ssn = (tid_data->seq_number & IEEE80211_SCTL_SEQ) >> 4;
2353 txq_id = tid_data->agg.txq_id;
2354
2355 switch (il->stations[sta_id].tid[tid].agg.state) {
2356 case IL_EMPTYING_HW_QUEUE_ADDBA:
2357 /*
2358 * This can happen if the peer stops aggregation
2359 * again before we've had a chance to drain the
2360 * queue we selected previously, i.e. before the
2361 * session was really started completely.
2362 */
2363 D_HT("AGG stop before setup done\n");
2364 goto turn_off;
2365 case IL_AGG_ON:
2366 break;
2367 default:
2368 IL_WARN("Stopping AGG while state not ON or starting\n");
2369 }
2370
2371 write_ptr = il->txq[txq_id].q.write_ptr;
2372 read_ptr = il->txq[txq_id].q.read_ptr;
2373
2374 /* The queue is not empty */
2375 if (write_ptr != read_ptr) {
2376 D_HT("Stopping a non empty AGG HW QUEUE\n");
2377 il->stations[sta_id].tid[tid].agg.state =
2378 IL_EMPTYING_HW_QUEUE_DELBA;
2379 spin_unlock_irqrestore(&il->sta_lock, flags);
2380 return 0;
2381 }
2382
2383 D_HT("HW queue is empty\n");
2384turn_off:
2385 il->stations[sta_id].tid[tid].agg.state = IL_AGG_OFF;
2386
2387 /* do not restore/save irqs */
2388 spin_unlock(&il->sta_lock);
2389 spin_lock(&il->lock);
2390
2391 /*
2392 * the only reason this call can fail is queue number out of range,
2393 * which can happen if uCode is reloaded and all the station
2394 * information are lost. if it is outside the range, there is no need
2395 * to deactivate the uCode queue, just return "success" to allow
2396 * mac80211 to clean up it own data.
2397 */
2398 il4965_txq_agg_disable(il, txq_id, ssn, tx_fifo_id);
2399 spin_unlock_irqrestore(&il->lock, flags);
2400
2401 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2402
2403 return 0;
2404}
2405
2406int
2407il4965_txq_check_empty(struct il_priv *il, int sta_id, u8 tid, int txq_id)
2408{
2409 struct il_queue *q = &il->txq[txq_id].q;
2410 u8 *addr = il->stations[sta_id].sta.sta.addr;
2411 struct il_tid_data *tid_data = &il->stations[sta_id].tid[tid];
2412
2413 lockdep_assert_held(&il->sta_lock);
2414
2415 switch (il->stations[sta_id].tid[tid].agg.state) {
2416 case IL_EMPTYING_HW_QUEUE_DELBA:
2417 /* We are reclaiming the last packet of the */
2418 /* aggregated HW queue */
2419 if (txq_id == tid_data->agg.txq_id &&
2420 q->read_ptr == q->write_ptr) {
2421 u16 ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
2422 int tx_fifo = il4965_get_fifo_from_tid(tid);
2423 D_HT("HW queue empty: continue DELBA flow\n");
2424 il4965_txq_agg_disable(il, txq_id, ssn, tx_fifo);
2425 tid_data->agg.state = IL_AGG_OFF;
2426 ieee80211_stop_tx_ba_cb_irqsafe(il->vif, addr, tid);
2427 }
2428 break;
2429 case IL_EMPTYING_HW_QUEUE_ADDBA:
2430 /* We are reclaiming the last packet of the queue */
2431 if (tid_data->tfds_in_queue == 0) {
2432 D_HT("HW queue empty: continue ADDBA flow\n");
2433 tid_data->agg.state = IL_AGG_ON;
2434 ieee80211_start_tx_ba_cb_irqsafe(il->vif, addr, tid);
2435 }
2436 break;
2437 }
2438
2439 return 0;
2440}
2441
2442static void
2443il4965_non_agg_tx_status(struct il_priv *il, const u8 *addr1)
2444{
2445 struct ieee80211_sta *sta;
2446 struct il_station_priv *sta_priv;
2447
2448 rcu_read_lock();
2449 sta = ieee80211_find_sta(il->vif, addr1);
2450 if (sta) {
2451 sta_priv = (void *)sta->drv_priv;
2452 /* avoid atomic ops if this isn't a client */
2453 if (sta_priv->client &&
2454 atomic_dec_return(&sta_priv->pending_frames) == 0)
2455 ieee80211_sta_block_awake(il->hw, sta, false);
2456 }
2457 rcu_read_unlock();
2458}
2459
2460static void
2461il4965_tx_status(struct il_priv *il, struct sk_buff *skb, bool is_agg)
2462{
2463 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2464
2465 if (!is_agg)
2466 il4965_non_agg_tx_status(il, hdr->addr1);
2467
2468 ieee80211_tx_status_irqsafe(il->hw, skb);
2469}
2470
2471int
2472il4965_tx_queue_reclaim(struct il_priv *il, int txq_id, int idx)
2473{
2474 struct il_tx_queue *txq = &il->txq[txq_id];
2475 struct il_queue *q = &txq->q;
2476 int nfreed = 0;
2477 struct ieee80211_hdr *hdr;
2478 struct sk_buff *skb;
2479
2480 if (idx >= q->n_bd || il_queue_used(q, idx) == 0) {
2481 IL_ERR("Read idx for DMA queue txq id (%d), idx %d, "
2482 "is out of range [0-%d] %d %d.\n", txq_id, idx, q->n_bd,
2483 q->write_ptr, q->read_ptr);
2484 return 0;
2485 }
2486
2487 for (idx = il_queue_inc_wrap(idx, q->n_bd); q->read_ptr != idx;
2488 q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd)) {
2489
2490 skb = txq->skbs[txq->q.read_ptr];
2491
2492 if (WARN_ON_ONCE(skb == NULL))
2493 continue;
2494
2495 hdr = (struct ieee80211_hdr *) skb->data;
2496 if (ieee80211_is_data_qos(hdr->frame_control))
2497 nfreed++;
2498
2499 il4965_tx_status(il, skb, txq_id >= IL4965_FIRST_AMPDU_QUEUE);
2500
2501 txq->skbs[txq->q.read_ptr] = NULL;
2502 il->ops->txq_free_tfd(il, txq);
2503 }
2504 return nfreed;
2505}
2506
2507/**
2508 * il4965_tx_status_reply_compressed_ba - Update tx status from block-ack
2509 *
2510 * Go through block-ack's bitmap of ACK'd frames, update driver's record of
2511 * ACK vs. not. This gets sent to mac80211, then to rate scaling algo.
2512 */
2513static int
2514il4965_tx_status_reply_compressed_ba(struct il_priv *il, struct il_ht_agg *agg,
2515 struct il_compressed_ba_resp *ba_resp)
2516{
2517 int i, sh, ack;
2518 u16 seq_ctl = le16_to_cpu(ba_resp->seq_ctl);
2519 u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
2520 int successes = 0;
2521 struct ieee80211_tx_info *info;
2522 u64 bitmap, sent_bitmap;
2523
2524 if (unlikely(!agg->wait_for_ba)) {
2525 if (unlikely(ba_resp->bitmap))
2526 IL_ERR("Received BA when not expected\n");
2527 return -EINVAL;
2528 }
2529
2530 /* Mark that the expected block-ack response arrived */
2531 agg->wait_for_ba = 0;
2532 D_TX_REPLY("BA %d %d\n", agg->start_idx, ba_resp->seq_ctl);
2533
2534 /* Calculate shift to align block-ack bits with our Tx win bits */
2535 sh = agg->start_idx - SEQ_TO_IDX(seq_ctl >> 4);
2536 if (sh < 0) /* tbw something is wrong with indices */
2537 sh += 0x100;
2538
2539 if (agg->frame_count > (64 - sh)) {
2540 D_TX_REPLY("more frames than bitmap size");
2541 return -1;
2542 }
2543
2544 /* don't use 64-bit values for now */
2545 bitmap = le64_to_cpu(ba_resp->bitmap) >> sh;
2546
2547 /* check for success or failure according to the
2548 * transmitted bitmap and block-ack bitmap */
2549 sent_bitmap = bitmap & agg->bitmap;
2550
2551 /* For each frame attempted in aggregation,
2552 * update driver's record of tx frame's status. */
2553 i = 0;
2554 while (sent_bitmap) {
2555 ack = sent_bitmap & 1ULL;
2556 successes += ack;
2557 D_TX_REPLY("%s ON i=%d idx=%d raw=%d\n", ack ? "ACK" : "NACK",
2558 i, (agg->start_idx + i) & 0xff, agg->start_idx + i);
2559 sent_bitmap >>= 1;
2560 ++i;
2561 }
2562
2563 D_TX_REPLY("Bitmap %llx\n", (unsigned long long)bitmap);
2564
2565 info = IEEE80211_SKB_CB(il->txq[scd_flow].skbs[agg->start_idx]);
2566 memset(&info->status, 0, sizeof(info->status));
2567 info->flags |= IEEE80211_TX_STAT_ACK;
2568 info->flags |= IEEE80211_TX_STAT_AMPDU;
2569 info->status.ampdu_ack_len = successes;
2570 info->status.ampdu_len = agg->frame_count;
2571 il4965_hwrate_to_tx_control(il, agg->rate_n_flags, info);
2572
2573 return 0;
2574}
2575
2576static inline bool
2577il4965_is_tx_success(u32 status)
2578{
2579 status &= TX_STATUS_MSK;
2580 return (status == TX_STATUS_SUCCESS || status == TX_STATUS_DIRECT_DONE);
2581}
2582
2583static u8
2584il4965_find_station(struct il_priv *il, const u8 *addr)
2585{
2586 int i;
2587 int start = 0;
2588 int ret = IL_INVALID_STATION;
2589 unsigned long flags;
2590
2591 if (il->iw_mode == NL80211_IFTYPE_ADHOC)
2592 start = IL_STA_ID;
2593
2594 if (is_broadcast_ether_addr(addr))
2595 return il->hw_params.bcast_id;
2596
2597 spin_lock_irqsave(&il->sta_lock, flags);
2598 for (i = start; i < il->hw_params.max_stations; i++)
2599 if (il->stations[i].used &&
2600 ether_addr_equal(il->stations[i].sta.sta.addr, addr)) {
2601 ret = i;
2602 goto out;
2603 }
2604
2605 D_ASSOC("can not find STA %pM total %d\n", addr, il->num_stations);
2606
2607out:
2608 /*
2609 * It may be possible that more commands interacting with stations
2610 * arrive before we completed processing the adding of
2611 * station
2612 */
2613 if (ret != IL_INVALID_STATION &&
2614 (!(il->stations[ret].used & IL_STA_UCODE_ACTIVE) ||
2615 ((il->stations[ret].used & IL_STA_UCODE_ACTIVE) &&
2616 (il->stations[ret].used & IL_STA_UCODE_INPROGRESS)))) {
2617 IL_ERR("Requested station info for sta %d before ready.\n",
2618 ret);
2619 ret = IL_INVALID_STATION;
2620 }
2621 spin_unlock_irqrestore(&il->sta_lock, flags);
2622 return ret;
2623}
2624
2625static int
2626il4965_get_ra_sta_id(struct il_priv *il, struct ieee80211_hdr *hdr)
2627{
2628 if (il->iw_mode == NL80211_IFTYPE_STATION)
2629 return IL_AP_ID;
2630 else {
2631 u8 *da = ieee80211_get_DA(hdr);
2632
2633 return il4965_find_station(il, da);
2634 }
2635}
2636
2637static inline u32
2638il4965_get_scd_ssn(struct il4965_tx_resp *tx_resp)
2639{
2640 return le32_to_cpup(&tx_resp->u.status +
2641 tx_resp->frame_count) & IEEE80211_MAX_SN;
2642}
2643
2644static inline u32
2645il4965_tx_status_to_mac80211(u32 status)
2646{
2647 status &= TX_STATUS_MSK;
2648
2649 switch (status) {
2650 case TX_STATUS_SUCCESS:
2651 case TX_STATUS_DIRECT_DONE:
2652 return IEEE80211_TX_STAT_ACK;
2653 case TX_STATUS_FAIL_DEST_PS:
2654 return IEEE80211_TX_STAT_TX_FILTERED;
2655 default:
2656 return 0;
2657 }
2658}
2659
2660/**
2661 * il4965_tx_status_reply_tx - Handle Tx response for frames in aggregation queue
2662 */
2663static int
2664il4965_tx_status_reply_tx(struct il_priv *il, struct il_ht_agg *agg,
2665 struct il4965_tx_resp *tx_resp, int txq_id,
2666 u16 start_idx)
2667{
2668 u16 status;
2669 struct agg_tx_status *frame_status = tx_resp->u.agg_status;
2670 struct ieee80211_tx_info *info = NULL;
2671 struct ieee80211_hdr *hdr = NULL;
2672 u32 rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
2673 int i, sh, idx;
2674 u16 seq;
2675 if (agg->wait_for_ba)
2676 D_TX_REPLY("got tx response w/o block-ack\n");
2677
2678 agg->frame_count = tx_resp->frame_count;
2679 agg->start_idx = start_idx;
2680 agg->rate_n_flags = rate_n_flags;
2681 agg->bitmap = 0;
2682
2683 /* num frames attempted by Tx command */
2684 if (agg->frame_count == 1) {
2685 /* Only one frame was attempted; no block-ack will arrive */
2686 status = le16_to_cpu(frame_status[0].status);
2687 idx = start_idx;
2688
2689 D_TX_REPLY("FrameCnt = %d, StartIdx=%d idx=%d\n",
2690 agg->frame_count, agg->start_idx, idx);
2691
2692 info = IEEE80211_SKB_CB(il->txq[txq_id].skbs[idx]);
2693 info->status.rates[0].count = tx_resp->failure_frame + 1;
2694 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
2695 info->flags |= il4965_tx_status_to_mac80211(status);
2696 il4965_hwrate_to_tx_control(il, rate_n_flags, info);
2697
2698 D_TX_REPLY("1 Frame 0x%x failure :%d\n", status & 0xff,
2699 tx_resp->failure_frame);
2700 D_TX_REPLY("Rate Info rate_n_flags=%x\n", rate_n_flags);
2701
2702 agg->wait_for_ba = 0;
2703 } else {
2704 /* Two or more frames were attempted; expect block-ack */
2705 u64 bitmap = 0;
2706 int start = agg->start_idx;
2707 struct sk_buff *skb;
2708
2709 /* Construct bit-map of pending frames within Tx win */
2710 for (i = 0; i < agg->frame_count; i++) {
2711 u16 sc;
2712 status = le16_to_cpu(frame_status[i].status);
2713 seq = le16_to_cpu(frame_status[i].sequence);
2714 idx = SEQ_TO_IDX(seq);
2715 txq_id = SEQ_TO_QUEUE(seq);
2716
2717 if (status &
2718 (AGG_TX_STATE_FEW_BYTES_MSK |
2719 AGG_TX_STATE_ABORT_MSK))
2720 continue;
2721
2722 D_TX_REPLY("FrameCnt = %d, txq_id=%d idx=%d\n",
2723 agg->frame_count, txq_id, idx);
2724
2725 skb = il->txq[txq_id].skbs[idx];
2726 if (WARN_ON_ONCE(skb == NULL))
2727 return -1;
2728 hdr = (struct ieee80211_hdr *) skb->data;
2729
2730 sc = le16_to_cpu(hdr->seq_ctrl);
2731 if (idx != (IEEE80211_SEQ_TO_SN(sc) & 0xff)) {
2732 IL_ERR("BUG_ON idx doesn't match seq control"
2733 " idx=%d, seq_idx=%d, seq=%d\n", idx,
2734 IEEE80211_SEQ_TO_SN(sc), hdr->seq_ctrl);
2735 return -1;
2736 }
2737
2738 D_TX_REPLY("AGG Frame i=%d idx %d seq=%d\n", i, idx,
2739 IEEE80211_SEQ_TO_SN(sc));
2740
2741 sh = idx - start;
2742 if (sh > 64) {
2743 sh = (start - idx) + 0xff;
2744 bitmap = bitmap << sh;
2745 sh = 0;
2746 start = idx;
2747 } else if (sh < -64)
2748 sh = 0xff - (start - idx);
2749 else if (sh < 0) {
2750 sh = start - idx;
2751 start = idx;
2752 bitmap = bitmap << sh;
2753 sh = 0;
2754 }
2755 bitmap |= 1ULL << sh;
2756 D_TX_REPLY("start=%d bitmap=0x%llx\n", start,
2757 (unsigned long long)bitmap);
2758 }
2759
2760 agg->bitmap = bitmap;
2761 agg->start_idx = start;
2762 D_TX_REPLY("Frames %d start_idx=%d bitmap=0x%llx\n",
2763 agg->frame_count, agg->start_idx,
2764 (unsigned long long)agg->bitmap);
2765
2766 if (bitmap)
2767 agg->wait_for_ba = 1;
2768 }
2769 return 0;
2770}
2771
2772/**
2773 * il4965_hdl_tx - Handle standard (non-aggregation) Tx response
2774 */
2775static void
2776il4965_hdl_tx(struct il_priv *il, struct il_rx_buf *rxb)
2777{
2778 struct il_rx_pkt *pkt = rxb_addr(rxb);
2779 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
2780 int txq_id = SEQ_TO_QUEUE(sequence);
2781 int idx = SEQ_TO_IDX(sequence);
2782 struct il_tx_queue *txq = &il->txq[txq_id];
2783 struct sk_buff *skb;
2784 struct ieee80211_hdr *hdr;
2785 struct ieee80211_tx_info *info;
2786 struct il4965_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
2787 u32 status = le32_to_cpu(tx_resp->u.status);
2788 int uninitialized_var(tid);
2789 int sta_id;
2790 int freed;
2791 u8 *qc = NULL;
2792 unsigned long flags;
2793
2794 if (idx >= txq->q.n_bd || il_queue_used(&txq->q, idx) == 0) {
2795 IL_ERR("Read idx for DMA queue txq_id (%d) idx %d "
2796 "is out of range [0-%d] %d %d\n", txq_id, idx,
2797 txq->q.n_bd, txq->q.write_ptr, txq->q.read_ptr);
2798 return;
2799 }
2800
2801 txq->time_stamp = jiffies;
2802
2803 skb = txq->skbs[txq->q.read_ptr];
2804 info = IEEE80211_SKB_CB(skb);
2805 memset(&info->status, 0, sizeof(info->status));
2806
2807 hdr = (struct ieee80211_hdr *) skb->data;
2808 if (ieee80211_is_data_qos(hdr->frame_control)) {
2809 qc = ieee80211_get_qos_ctl(hdr);
2810 tid = qc[0] & 0xf;
2811 }
2812
2813 sta_id = il4965_get_ra_sta_id(il, hdr);
2814 if (txq->sched_retry && unlikely(sta_id == IL_INVALID_STATION)) {
2815 IL_ERR("Station not known\n");
2816 return;
2817 }
2818
2819 /*
2820 * Firmware will not transmit frame on passive channel, if it not yet
2821 * received some valid frame on that channel. When this error happen
2822 * we have to wait until firmware will unblock itself i.e. when we
2823 * note received beacon or other frame. We unblock queues in
2824 * il4965_pass_packet_to_mac80211 or in il_mac_bss_info_changed.
2825 */
2826 if (unlikely((status & TX_STATUS_MSK) == TX_STATUS_FAIL_PASSIVE_NO_RX) &&
2827 il->iw_mode == NL80211_IFTYPE_STATION) {
2828 il_stop_queues_by_reason(il, IL_STOP_REASON_PASSIVE);
2829 D_INFO("Stopped queues - RX waiting on passive channel\n");
2830 }
2831
2832 spin_lock_irqsave(&il->sta_lock, flags);
2833 if (txq->sched_retry) {
2834 const u32 scd_ssn = il4965_get_scd_ssn(tx_resp);
2835 struct il_ht_agg *agg = NULL;
2836 WARN_ON(!qc);
2837
2838 agg = &il->stations[sta_id].tid[tid].agg;
2839
2840 il4965_tx_status_reply_tx(il, agg, tx_resp, txq_id, idx);
2841
2842 /* check if BAR is needed */
2843 if (tx_resp->frame_count == 1 &&
2844 !il4965_is_tx_success(status))
2845 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
2846
2847 if (txq->q.read_ptr != (scd_ssn & 0xff)) {
2848 idx = il_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
2849 D_TX_REPLY("Retry scheduler reclaim scd_ssn "
2850 "%d idx %d\n", scd_ssn, idx);
2851 freed = il4965_tx_queue_reclaim(il, txq_id, idx);
2852 if (qc)
2853 il4965_free_tfds_in_queue(il, sta_id, tid,
2854 freed);
2855
2856 if (il->mac80211_registered &&
2857 il_queue_space(&txq->q) > txq->q.low_mark &&
2858 agg->state != IL_EMPTYING_HW_QUEUE_DELBA)
2859 il_wake_queue(il, txq);
2860 }
2861 } else {
2862 info->status.rates[0].count = tx_resp->failure_frame + 1;
2863 info->flags |= il4965_tx_status_to_mac80211(status);
2864 il4965_hwrate_to_tx_control(il,
2865 le32_to_cpu(tx_resp->rate_n_flags),
2866 info);
2867
2868 D_TX_REPLY("TXQ %d status %s (0x%08x) "
2869 "rate_n_flags 0x%x retries %d\n", txq_id,
2870 il4965_get_tx_fail_reason(status), status,
2871 le32_to_cpu(tx_resp->rate_n_flags),
2872 tx_resp->failure_frame);
2873
2874 freed = il4965_tx_queue_reclaim(il, txq_id, idx);
2875 if (qc && likely(sta_id != IL_INVALID_STATION))
2876 il4965_free_tfds_in_queue(il, sta_id, tid, freed);
2877 else if (sta_id == IL_INVALID_STATION)
2878 D_TX_REPLY("Station not known\n");
2879
2880 if (il->mac80211_registered &&
2881 il_queue_space(&txq->q) > txq->q.low_mark)
2882 il_wake_queue(il, txq);
2883 }
2884 if (qc && likely(sta_id != IL_INVALID_STATION))
2885 il4965_txq_check_empty(il, sta_id, tid, txq_id);
2886
2887 il4965_check_abort_status(il, tx_resp->frame_count, status);
2888
2889 spin_unlock_irqrestore(&il->sta_lock, flags);
2890}
2891
2892/**
2893 * translate ucode response to mac80211 tx status control values
2894 */
2895void
2896il4965_hwrate_to_tx_control(struct il_priv *il, u32 rate_n_flags,
2897 struct ieee80211_tx_info *info)
2898{
2899 struct ieee80211_tx_rate *r = &info->status.rates[0];
2900
2901 info->status.antenna =
2902 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
2903 if (rate_n_flags & RATE_MCS_HT_MSK)
2904 r->flags |= IEEE80211_TX_RC_MCS;
2905 if (rate_n_flags & RATE_MCS_GF_MSK)
2906 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
2907 if (rate_n_flags & RATE_MCS_HT40_MSK)
2908 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
2909 if (rate_n_flags & RATE_MCS_DUP_MSK)
2910 r->flags |= IEEE80211_TX_RC_DUP_DATA;
2911 if (rate_n_flags & RATE_MCS_SGI_MSK)
2912 r->flags |= IEEE80211_TX_RC_SHORT_GI;
2913 r->idx = il4965_hwrate_to_mac80211_idx(rate_n_flags, info->band);
2914}
2915
2916/**
2917 * il4965_hdl_compressed_ba - Handler for N_COMPRESSED_BA
2918 *
2919 * Handles block-acknowledge notification from device, which reports success
2920 * of frames sent via aggregation.
2921 */
2922static void
2923il4965_hdl_compressed_ba(struct il_priv *il, struct il_rx_buf *rxb)
2924{
2925 struct il_rx_pkt *pkt = rxb_addr(rxb);
2926 struct il_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba;
2927 struct il_tx_queue *txq = NULL;
2928 struct il_ht_agg *agg;
2929 int idx;
2930 int sta_id;
2931 int tid;
2932 unsigned long flags;
2933
2934 /* "flow" corresponds to Tx queue */
2935 u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
2936
2937 /* "ssn" is start of block-ack Tx win, corresponds to idx
2938 * (in Tx queue's circular buffer) of first TFD/frame in win */
2939 u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
2940
2941 if (scd_flow >= il->hw_params.max_txq_num) {
2942 IL_ERR("BUG_ON scd_flow is bigger than number of queues\n");
2943 return;
2944 }
2945
2946 txq = &il->txq[scd_flow];
2947 sta_id = ba_resp->sta_id;
2948 tid = ba_resp->tid;
2949 agg = &il->stations[sta_id].tid[tid].agg;
2950 if (unlikely(agg->txq_id != scd_flow)) {
2951 /*
2952 * FIXME: this is a uCode bug which need to be addressed,
2953 * log the information and return for now!
2954 * since it is possible happen very often and in order
2955 * not to fill the syslog, don't enable the logging by default
2956 */
2957 D_TX_REPLY("BA scd_flow %d does not match txq_id %d\n",
2958 scd_flow, agg->txq_id);
2959 return;
2960 }
2961
2962 /* Find idx just before block-ack win */
2963 idx = il_queue_dec_wrap(ba_resp_scd_ssn & 0xff, txq->q.n_bd);
2964
2965 spin_lock_irqsave(&il->sta_lock, flags);
2966
2967 D_TX_REPLY("N_COMPRESSED_BA [%d] Received from %pM, " "sta_id = %d\n",
2968 agg->wait_for_ba, (u8 *) &ba_resp->sta_addr_lo32,
2969 ba_resp->sta_id);
2970 D_TX_REPLY("TID = %d, SeqCtl = %d, bitmap = 0x%llx," "scd_flow = "
2971 "%d, scd_ssn = %d\n", ba_resp->tid, ba_resp->seq_ctl,
2972 (unsigned long long)le64_to_cpu(ba_resp->bitmap),
2973 ba_resp->scd_flow, ba_resp->scd_ssn);
2974 D_TX_REPLY("DAT start_idx = %d, bitmap = 0x%llx\n", agg->start_idx,
2975 (unsigned long long)agg->bitmap);
2976
2977 /* Update driver's record of ACK vs. not for each frame in win */
2978 il4965_tx_status_reply_compressed_ba(il, agg, ba_resp);
2979
2980 /* Release all TFDs before the SSN, i.e. all TFDs in front of
2981 * block-ack win (we assume that they've been successfully
2982 * transmitted ... if not, it's too late anyway). */
2983 if (txq->q.read_ptr != (ba_resp_scd_ssn & 0xff)) {
2984 /* calculate mac80211 ampdu sw queue to wake */
2985 int freed = il4965_tx_queue_reclaim(il, scd_flow, idx);
2986 il4965_free_tfds_in_queue(il, sta_id, tid, freed);
2987
2988 if (il_queue_space(&txq->q) > txq->q.low_mark &&
2989 il->mac80211_registered &&
2990 agg->state != IL_EMPTYING_HW_QUEUE_DELBA)
2991 il_wake_queue(il, txq);
2992
2993 il4965_txq_check_empty(il, sta_id, tid, scd_flow);
2994 }
2995
2996 spin_unlock_irqrestore(&il->sta_lock, flags);
2997}
2998
2999#ifdef CONFIG_IWLEGACY_DEBUG
3000const char *
3001il4965_get_tx_fail_reason(u32 status)
3002{
3003#define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
3004#define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
3005
3006 switch (status & TX_STATUS_MSK) {
3007 case TX_STATUS_SUCCESS:
3008 return "SUCCESS";
3009 TX_STATUS_POSTPONE(DELAY);
3010 TX_STATUS_POSTPONE(FEW_BYTES);
3011 TX_STATUS_POSTPONE(QUIET_PERIOD);
3012 TX_STATUS_POSTPONE(CALC_TTAK);
3013 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
3014 TX_STATUS_FAIL(SHORT_LIMIT);
3015 TX_STATUS_FAIL(LONG_LIMIT);
3016 TX_STATUS_FAIL(FIFO_UNDERRUN);
3017 TX_STATUS_FAIL(DRAIN_FLOW);
3018 TX_STATUS_FAIL(RFKILL_FLUSH);
3019 TX_STATUS_FAIL(LIFE_EXPIRE);
3020 TX_STATUS_FAIL(DEST_PS);
3021 TX_STATUS_FAIL(HOST_ABORTED);
3022 TX_STATUS_FAIL(BT_RETRY);
3023 TX_STATUS_FAIL(STA_INVALID);
3024 TX_STATUS_FAIL(FRAG_DROPPED);
3025 TX_STATUS_FAIL(TID_DISABLE);
3026 TX_STATUS_FAIL(FIFO_FLUSHED);
3027 TX_STATUS_FAIL(INSUFFICIENT_CF_POLL);
3028 TX_STATUS_FAIL(PASSIVE_NO_RX);
3029 TX_STATUS_FAIL(NO_BEACON_ON_RADAR);
3030 }
3031
3032 return "UNKNOWN";
3033
3034#undef TX_STATUS_FAIL
3035#undef TX_STATUS_POSTPONE
3036}
3037#endif /* CONFIG_IWLEGACY_DEBUG */
3038
3039static struct il_link_quality_cmd *
3040il4965_sta_alloc_lq(struct il_priv *il, u8 sta_id)
3041{
3042 int i, r;
3043 struct il_link_quality_cmd *link_cmd;
3044 u32 rate_flags = 0;
3045 __le32 rate_n_flags;
3046
3047 link_cmd = kzalloc(sizeof(struct il_link_quality_cmd), GFP_KERNEL);
3048 if (!link_cmd) {
3049 IL_ERR("Unable to allocate memory for LQ cmd.\n");
3050 return NULL;
3051 }
3052 /* Set up the rate scaling to start at selected rate, fall back
3053 * all the way down to 1M in IEEE order, and then spin on 1M */
3054 if (il->band == IEEE80211_BAND_5GHZ)
3055 r = RATE_6M_IDX;
3056 else
3057 r = RATE_1M_IDX;
3058
3059 if (r >= IL_FIRST_CCK_RATE && r <= IL_LAST_CCK_RATE)
3060 rate_flags |= RATE_MCS_CCK_MSK;
3061
3062 rate_flags |=
3063 il4965_first_antenna(il->hw_params.
3064 valid_tx_ant) << RATE_MCS_ANT_POS;
3065 rate_n_flags = cpu_to_le32(il_rates[r].plcp | rate_flags);
3066 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
3067 link_cmd->rs_table[i].rate_n_flags = rate_n_flags;
3068
3069 link_cmd->general_params.single_stream_ant_msk =
3070 il4965_first_antenna(il->hw_params.valid_tx_ant);
3071
3072 link_cmd->general_params.dual_stream_ant_msk =
3073 il->hw_params.valid_tx_ant & ~il4965_first_antenna(il->hw_params.
3074 valid_tx_ant);
3075 if (!link_cmd->general_params.dual_stream_ant_msk) {
3076 link_cmd->general_params.dual_stream_ant_msk = ANT_AB;
3077 } else if (il4965_num_of_ant(il->hw_params.valid_tx_ant) == 2) {
3078 link_cmd->general_params.dual_stream_ant_msk =
3079 il->hw_params.valid_tx_ant;
3080 }
3081
3082 link_cmd->agg_params.agg_dis_start_th = LINK_QUAL_AGG_DISABLE_START_DEF;
3083 link_cmd->agg_params.agg_time_limit =
3084 cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF);
3085
3086 link_cmd->sta_id = sta_id;
3087
3088 return link_cmd;
3089}
3090
3091/*
3092 * il4965_add_bssid_station - Add the special IBSS BSSID station
3093 *
3094 * Function sleeps.
3095 */
3096int
3097il4965_add_bssid_station(struct il_priv *il, const u8 *addr, u8 *sta_id_r)
3098{
3099 int ret;
3100 u8 sta_id;
3101 struct il_link_quality_cmd *link_cmd;
3102 unsigned long flags;
3103
3104 if (sta_id_r)
3105 *sta_id_r = IL_INVALID_STATION;
3106
3107 ret = il_add_station_common(il, addr, 0, NULL, &sta_id);
3108 if (ret) {
3109 IL_ERR("Unable to add station %pM\n", addr);
3110 return ret;
3111 }
3112
3113 if (sta_id_r)
3114 *sta_id_r = sta_id;
3115
3116 spin_lock_irqsave(&il->sta_lock, flags);
3117 il->stations[sta_id].used |= IL_STA_LOCAL;
3118 spin_unlock_irqrestore(&il->sta_lock, flags);
3119
3120 /* Set up default rate scaling table in device's station table */
3121 link_cmd = il4965_sta_alloc_lq(il, sta_id);
3122 if (!link_cmd) {
3123 IL_ERR("Unable to initialize rate scaling for station %pM.\n",
3124 addr);
3125 return -ENOMEM;
3126 }
3127
3128 ret = il_send_lq_cmd(il, link_cmd, CMD_SYNC, true);
3129 if (ret)
3130 IL_ERR("Link quality command failed (%d)\n", ret);
3131
3132 spin_lock_irqsave(&il->sta_lock, flags);
3133 il->stations[sta_id].lq = link_cmd;
3134 spin_unlock_irqrestore(&il->sta_lock, flags);
3135
3136 return 0;
3137}
3138
3139static int
3140il4965_static_wepkey_cmd(struct il_priv *il, bool send_if_empty)
3141{
3142 int i;
3143 u8 buff[sizeof(struct il_wep_cmd) +
3144 sizeof(struct il_wep_key) * WEP_KEYS_MAX];
3145 struct il_wep_cmd *wep_cmd = (struct il_wep_cmd *)buff;
3146 size_t cmd_size = sizeof(struct il_wep_cmd);
3147 struct il_host_cmd cmd = {
3148 .id = C_WEPKEY,
3149 .data = wep_cmd,
3150 .flags = CMD_SYNC,
3151 };
3152 bool not_empty = false;
3153
3154 might_sleep();
3155
3156 memset(wep_cmd, 0,
3157 cmd_size + (sizeof(struct il_wep_key) * WEP_KEYS_MAX));
3158
3159 for (i = 0; i < WEP_KEYS_MAX; i++) {
3160 u8 key_size = il->_4965.wep_keys[i].key_size;
3161
3162 wep_cmd->key[i].key_idx = i;
3163 if (key_size) {
3164 wep_cmd->key[i].key_offset = i;
3165 not_empty = true;
3166 } else
3167 wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
3168
3169 wep_cmd->key[i].key_size = key_size;
3170 memcpy(&wep_cmd->key[i].key[3], il->_4965.wep_keys[i].key, key_size);
3171 }
3172
3173 wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
3174 wep_cmd->num_keys = WEP_KEYS_MAX;
3175
3176 cmd_size += sizeof(struct il_wep_key) * WEP_KEYS_MAX;
3177 cmd.len = cmd_size;
3178
3179 if (not_empty || send_if_empty)
3180 return il_send_cmd(il, &cmd);
3181 else
3182 return 0;
3183}
3184
3185int
3186il4965_restore_default_wep_keys(struct il_priv *il)
3187{
3188 lockdep_assert_held(&il->mutex);
3189
3190 return il4965_static_wepkey_cmd(il, false);
3191}
3192
3193int
3194il4965_remove_default_wep_key(struct il_priv *il,
3195 struct ieee80211_key_conf *keyconf)
3196{
3197 int ret;
3198 int idx = keyconf->keyidx;
3199
3200 lockdep_assert_held(&il->mutex);
3201
3202 D_WEP("Removing default WEP key: idx=%d\n", idx);
3203
3204 memset(&il->_4965.wep_keys[idx], 0, sizeof(struct il_wep_key));
3205 if (il_is_rfkill(il)) {
3206 D_WEP("Not sending C_WEPKEY command due to RFKILL.\n");
3207 /* but keys in device are clear anyway so return success */
3208 return 0;
3209 }
3210 ret = il4965_static_wepkey_cmd(il, 1);
3211 D_WEP("Remove default WEP key: idx=%d ret=%d\n", idx, ret);
3212
3213 return ret;
3214}
3215
3216int
3217il4965_set_default_wep_key(struct il_priv *il,
3218 struct ieee80211_key_conf *keyconf)
3219{
3220 int ret;
3221 int len = keyconf->keylen;
3222 int idx = keyconf->keyidx;
3223
3224 lockdep_assert_held(&il->mutex);
3225
3226 if (len != WEP_KEY_LEN_128 && len != WEP_KEY_LEN_64) {
3227 D_WEP("Bad WEP key length %d\n", keyconf->keylen);
3228 return -EINVAL;
3229 }
3230
3231 keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
3232 keyconf->hw_key_idx = HW_KEY_DEFAULT;
3233 il->stations[IL_AP_ID].keyinfo.cipher = keyconf->cipher;
3234
3235 il->_4965.wep_keys[idx].key_size = len;
3236 memcpy(&il->_4965.wep_keys[idx].key, &keyconf->key, len);
3237
3238 ret = il4965_static_wepkey_cmd(il, false);
3239
3240 D_WEP("Set default WEP key: len=%d idx=%d ret=%d\n", len, idx, ret);
3241 return ret;
3242}
3243
3244static int
3245il4965_set_wep_dynamic_key_info(struct il_priv *il,
3246 struct ieee80211_key_conf *keyconf, u8 sta_id)
3247{
3248 unsigned long flags;
3249 __le16 key_flags = 0;
3250 struct il_addsta_cmd sta_cmd;
3251
3252 lockdep_assert_held(&il->mutex);
3253
3254 keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
3255
3256 key_flags |= (STA_KEY_FLG_WEP | STA_KEY_FLG_MAP_KEY_MSK);
3257 key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
3258 key_flags &= ~STA_KEY_FLG_INVALID;
3259
3260 if (keyconf->keylen == WEP_KEY_LEN_128)
3261 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
3262
3263 if (sta_id == il->hw_params.bcast_id)
3264 key_flags |= STA_KEY_MULTICAST_MSK;
3265
3266 spin_lock_irqsave(&il->sta_lock, flags);
3267
3268 il->stations[sta_id].keyinfo.cipher = keyconf->cipher;
3269 il->stations[sta_id].keyinfo.keylen = keyconf->keylen;
3270 il->stations[sta_id].keyinfo.keyidx = keyconf->keyidx;
3271
3272 memcpy(il->stations[sta_id].keyinfo.key, keyconf->key, keyconf->keylen);
3273
3274 memcpy(&il->stations[sta_id].sta.key.key[3], keyconf->key,
3275 keyconf->keylen);
3276
3277 if ((il->stations[sta_id].sta.key.
3278 key_flags & STA_KEY_FLG_ENCRYPT_MSK) == STA_KEY_FLG_NO_ENC)
3279 il->stations[sta_id].sta.key.key_offset =
3280 il_get_free_ucode_key_idx(il);
3281 /* else, we are overriding an existing key => no need to allocated room
3282 * in uCode. */
3283
3284 WARN(il->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
3285 "no space for a new key");
3286
3287 il->stations[sta_id].sta.key.key_flags = key_flags;
3288 il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
3289 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3290
3291 memcpy(&sta_cmd, &il->stations[sta_id].sta,
3292 sizeof(struct il_addsta_cmd));
3293 spin_unlock_irqrestore(&il->sta_lock, flags);
3294
3295 return il_send_add_sta(il, &sta_cmd, CMD_SYNC);
3296}
3297
3298static int
3299il4965_set_ccmp_dynamic_key_info(struct il_priv *il,
3300 struct ieee80211_key_conf *keyconf, u8 sta_id)
3301{
3302 unsigned long flags;
3303 __le16 key_flags = 0;
3304 struct il_addsta_cmd sta_cmd;
3305
3306 lockdep_assert_held(&il->mutex);
3307
3308 key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
3309 key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
3310 key_flags &= ~STA_KEY_FLG_INVALID;
3311
3312 if (sta_id == il->hw_params.bcast_id)
3313 key_flags |= STA_KEY_MULTICAST_MSK;
3314
3315 keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
3316
3317 spin_lock_irqsave(&il->sta_lock, flags);
3318 il->stations[sta_id].keyinfo.cipher = keyconf->cipher;
3319 il->stations[sta_id].keyinfo.keylen = keyconf->keylen;
3320
3321 memcpy(il->stations[sta_id].keyinfo.key, keyconf->key, keyconf->keylen);
3322
3323 memcpy(il->stations[sta_id].sta.key.key, keyconf->key, keyconf->keylen);
3324
3325 if ((il->stations[sta_id].sta.key.
3326 key_flags & STA_KEY_FLG_ENCRYPT_MSK) == STA_KEY_FLG_NO_ENC)
3327 il->stations[sta_id].sta.key.key_offset =
3328 il_get_free_ucode_key_idx(il);
3329 /* else, we are overriding an existing key => no need to allocated room
3330 * in uCode. */
3331
3332 WARN(il->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
3333 "no space for a new key");
3334
3335 il->stations[sta_id].sta.key.key_flags = key_flags;
3336 il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
3337 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3338
3339 memcpy(&sta_cmd, &il->stations[sta_id].sta,
3340 sizeof(struct il_addsta_cmd));
3341 spin_unlock_irqrestore(&il->sta_lock, flags);
3342
3343 return il_send_add_sta(il, &sta_cmd, CMD_SYNC);
3344}
3345
3346static int
3347il4965_set_tkip_dynamic_key_info(struct il_priv *il,
3348 struct ieee80211_key_conf *keyconf, u8 sta_id)
3349{
3350 unsigned long flags;
3351 int ret = 0;
3352 __le16 key_flags = 0;
3353
3354 key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
3355 key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
3356 key_flags &= ~STA_KEY_FLG_INVALID;
3357
3358 if (sta_id == il->hw_params.bcast_id)
3359 key_flags |= STA_KEY_MULTICAST_MSK;
3360
3361 keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
3362 keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
3363
3364 spin_lock_irqsave(&il->sta_lock, flags);
3365
3366 il->stations[sta_id].keyinfo.cipher = keyconf->cipher;
3367 il->stations[sta_id].keyinfo.keylen = 16;
3368
3369 if ((il->stations[sta_id].sta.key.
3370 key_flags & STA_KEY_FLG_ENCRYPT_MSK) == STA_KEY_FLG_NO_ENC)
3371 il->stations[sta_id].sta.key.key_offset =
3372 il_get_free_ucode_key_idx(il);
3373 /* else, we are overriding an existing key => no need to allocated room
3374 * in uCode. */
3375
3376 WARN(il->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
3377 "no space for a new key");
3378
3379 il->stations[sta_id].sta.key.key_flags = key_flags;
3380
3381 /* This copy is acutally not needed: we get the key with each TX */
3382 memcpy(il->stations[sta_id].keyinfo.key, keyconf->key, 16);
3383
3384 memcpy(il->stations[sta_id].sta.key.key, keyconf->key, 16);
3385
3386 spin_unlock_irqrestore(&il->sta_lock, flags);
3387
3388 return ret;
3389}
3390
3391void
3392il4965_update_tkip_key(struct il_priv *il, struct ieee80211_key_conf *keyconf,
3393 struct ieee80211_sta *sta, u32 iv32, u16 *phase1key)
3394{
3395 u8 sta_id;
3396 unsigned long flags;
3397 int i;
3398
3399 if (il_scan_cancel(il)) {
3400 /* cancel scan failed, just live w/ bad key and rely
3401 briefly on SW decryption */
3402 return;
3403 }
3404
3405 sta_id = il_sta_id_or_broadcast(il, sta);
3406 if (sta_id == IL_INVALID_STATION)
3407 return;
3408
3409 spin_lock_irqsave(&il->sta_lock, flags);
3410
3411 il->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
3412
3413 for (i = 0; i < 5; i++)
3414 il->stations[sta_id].sta.key.tkip_rx_ttak[i] =
3415 cpu_to_le16(phase1key[i]);
3416
3417 il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
3418 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3419
3420 il_send_add_sta(il, &il->stations[sta_id].sta, CMD_ASYNC);
3421
3422 spin_unlock_irqrestore(&il->sta_lock, flags);
3423}
3424
3425int
3426il4965_remove_dynamic_key(struct il_priv *il,
3427 struct ieee80211_key_conf *keyconf, u8 sta_id)
3428{
3429 unsigned long flags;
3430 u16 key_flags;
3431 u8 keyidx;
3432 struct il_addsta_cmd sta_cmd;
3433
3434 lockdep_assert_held(&il->mutex);
3435
3436 il->_4965.key_mapping_keys--;
3437
3438 spin_lock_irqsave(&il->sta_lock, flags);
3439 key_flags = le16_to_cpu(il->stations[sta_id].sta.key.key_flags);
3440 keyidx = (key_flags >> STA_KEY_FLG_KEYID_POS) & 0x3;
3441
3442 D_WEP("Remove dynamic key: idx=%d sta=%d\n", keyconf->keyidx, sta_id);
3443
3444 if (keyconf->keyidx != keyidx) {
3445 /* We need to remove a key with idx different that the one
3446 * in the uCode. This means that the key we need to remove has
3447 * been replaced by another one with different idx.
3448 * Don't do anything and return ok
3449 */
3450 spin_unlock_irqrestore(&il->sta_lock, flags);
3451 return 0;
3452 }
3453
3454 if (il->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_INVALID) {
3455 IL_WARN("Removing wrong key %d 0x%x\n", keyconf->keyidx,
3456 key_flags);
3457 spin_unlock_irqrestore(&il->sta_lock, flags);
3458 return 0;
3459 }
3460
3461 if (!test_and_clear_bit
3462 (il->stations[sta_id].sta.key.key_offset, &il->ucode_key_table))
3463 IL_ERR("idx %d not used in uCode key table.\n",
3464 il->stations[sta_id].sta.key.key_offset);
3465 memset(&il->stations[sta_id].keyinfo, 0, sizeof(struct il_hw_key));
3466 memset(&il->stations[sta_id].sta.key, 0, sizeof(struct il4965_keyinfo));
3467 il->stations[sta_id].sta.key.key_flags =
3468 STA_KEY_FLG_NO_ENC | STA_KEY_FLG_INVALID;
3469 il->stations[sta_id].sta.key.key_offset = keyconf->hw_key_idx;
3470 il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
3471 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3472
3473 if (il_is_rfkill(il)) {
3474 D_WEP
3475 ("Not sending C_ADD_STA command because RFKILL enabled.\n");
3476 spin_unlock_irqrestore(&il->sta_lock, flags);
3477 return 0;
3478 }
3479 memcpy(&sta_cmd, &il->stations[sta_id].sta,
3480 sizeof(struct il_addsta_cmd));
3481 spin_unlock_irqrestore(&il->sta_lock, flags);
3482
3483 return il_send_add_sta(il, &sta_cmd, CMD_SYNC);
3484}
3485
3486int
3487il4965_set_dynamic_key(struct il_priv *il, struct ieee80211_key_conf *keyconf,
3488 u8 sta_id)
3489{
3490 int ret;
3491
3492 lockdep_assert_held(&il->mutex);
3493
3494 il->_4965.key_mapping_keys++;
3495 keyconf->hw_key_idx = HW_KEY_DYNAMIC;
3496
3497 switch (keyconf->cipher) {
3498 case WLAN_CIPHER_SUITE_CCMP:
3499 ret =
3500 il4965_set_ccmp_dynamic_key_info(il, keyconf, sta_id);
3501 break;
3502 case WLAN_CIPHER_SUITE_TKIP:
3503 ret =
3504 il4965_set_tkip_dynamic_key_info(il, keyconf, sta_id);
3505 break;
3506 case WLAN_CIPHER_SUITE_WEP40:
3507 case WLAN_CIPHER_SUITE_WEP104:
3508 ret = il4965_set_wep_dynamic_key_info(il, keyconf, sta_id);
3509 break;
3510 default:
3511 IL_ERR("Unknown alg: %s cipher = %x\n", __func__,
3512 keyconf->cipher);
3513 ret = -EINVAL;
3514 }
3515
3516 D_WEP("Set dynamic key: cipher=%x len=%d idx=%d sta=%d ret=%d\n",
3517 keyconf->cipher, keyconf->keylen, keyconf->keyidx, sta_id, ret);
3518
3519 return ret;
3520}
3521
3522/**
3523 * il4965_alloc_bcast_station - add broadcast station into driver's station table.
3524 *
3525 * This adds the broadcast station into the driver's station table
3526 * and marks it driver active, so that it will be restored to the
3527 * device at the next best time.
3528 */
3529int
3530il4965_alloc_bcast_station(struct il_priv *il)
3531{
3532 struct il_link_quality_cmd *link_cmd;
3533 unsigned long flags;
3534 u8 sta_id;
3535
3536 spin_lock_irqsave(&il->sta_lock, flags);
3537 sta_id = il_prep_station(il, il_bcast_addr, false, NULL);
3538 if (sta_id == IL_INVALID_STATION) {
3539 IL_ERR("Unable to prepare broadcast station\n");
3540 spin_unlock_irqrestore(&il->sta_lock, flags);
3541
3542 return -EINVAL;
3543 }
3544
3545 il->stations[sta_id].used |= IL_STA_DRIVER_ACTIVE;
3546 il->stations[sta_id].used |= IL_STA_BCAST;
3547 spin_unlock_irqrestore(&il->sta_lock, flags);
3548
3549 link_cmd = il4965_sta_alloc_lq(il, sta_id);
3550 if (!link_cmd) {
3551 IL_ERR
3552 ("Unable to initialize rate scaling for bcast station.\n");
3553 return -ENOMEM;
3554 }
3555
3556 spin_lock_irqsave(&il->sta_lock, flags);
3557 il->stations[sta_id].lq = link_cmd;
3558 spin_unlock_irqrestore(&il->sta_lock, flags);
3559
3560 return 0;
3561}
3562
3563/**
3564 * il4965_update_bcast_station - update broadcast station's LQ command
3565 *
3566 * Only used by iwl4965. Placed here to have all bcast station management
3567 * code together.
3568 */
3569static int
3570il4965_update_bcast_station(struct il_priv *il)
3571{
3572 unsigned long flags;
3573 struct il_link_quality_cmd *link_cmd;
3574 u8 sta_id = il->hw_params.bcast_id;
3575
3576 link_cmd = il4965_sta_alloc_lq(il, sta_id);
3577 if (!link_cmd) {
3578 IL_ERR("Unable to initialize rate scaling for bcast sta.\n");
3579 return -ENOMEM;
3580 }
3581
3582 spin_lock_irqsave(&il->sta_lock, flags);
3583 if (il->stations[sta_id].lq)
3584 kfree(il->stations[sta_id].lq);
3585 else
3586 D_INFO("Bcast sta rate scaling has not been initialized.\n");
3587 il->stations[sta_id].lq = link_cmd;
3588 spin_unlock_irqrestore(&il->sta_lock, flags);
3589
3590 return 0;
3591}
3592
3593int
3594il4965_update_bcast_stations(struct il_priv *il)
3595{
3596 return il4965_update_bcast_station(il);
3597}
3598
3599/**
3600 * il4965_sta_tx_modify_enable_tid - Enable Tx for this TID in station table
3601 */
3602int
3603il4965_sta_tx_modify_enable_tid(struct il_priv *il, int sta_id, int tid)
3604{
3605 unsigned long flags;
3606 struct il_addsta_cmd sta_cmd;
3607
3608 lockdep_assert_held(&il->mutex);
3609
3610 /* Remove "disable" flag, to enable Tx for this TID */
3611 spin_lock_irqsave(&il->sta_lock, flags);
3612 il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
3613 il->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
3614 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3615 memcpy(&sta_cmd, &il->stations[sta_id].sta,
3616 sizeof(struct il_addsta_cmd));
3617 spin_unlock_irqrestore(&il->sta_lock, flags);
3618
3619 return il_send_add_sta(il, &sta_cmd, CMD_SYNC);
3620}
3621
3622int
3623il4965_sta_rx_agg_start(struct il_priv *il, struct ieee80211_sta *sta, int tid,
3624 u16 ssn)
3625{
3626 unsigned long flags;
3627 int sta_id;
3628 struct il_addsta_cmd sta_cmd;
3629
3630 lockdep_assert_held(&il->mutex);
3631
3632 sta_id = il_sta_id(sta);
3633 if (sta_id == IL_INVALID_STATION)
3634 return -ENXIO;
3635
3636 spin_lock_irqsave(&il->sta_lock, flags);
3637 il->stations[sta_id].sta.station_flags_msk = 0;
3638 il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
3639 il->stations[sta_id].sta.add_immediate_ba_tid = (u8) tid;
3640 il->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
3641 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3642 memcpy(&sta_cmd, &il->stations[sta_id].sta,
3643 sizeof(struct il_addsta_cmd));
3644 spin_unlock_irqrestore(&il->sta_lock, flags);
3645
3646 return il_send_add_sta(il, &sta_cmd, CMD_SYNC);
3647}
3648
3649int
3650il4965_sta_rx_agg_stop(struct il_priv *il, struct ieee80211_sta *sta, int tid)
3651{
3652 unsigned long flags;
3653 int sta_id;
3654 struct il_addsta_cmd sta_cmd;
3655
3656 lockdep_assert_held(&il->mutex);
3657
3658 sta_id = il_sta_id(sta);
3659 if (sta_id == IL_INVALID_STATION) {
3660 IL_ERR("Invalid station for AGG tid %d\n", tid);
3661 return -ENXIO;
3662 }
3663
3664 spin_lock_irqsave(&il->sta_lock, flags);
3665 il->stations[sta_id].sta.station_flags_msk = 0;
3666 il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
3667 il->stations[sta_id].sta.remove_immediate_ba_tid = (u8) tid;
3668 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3669 memcpy(&sta_cmd, &il->stations[sta_id].sta,
3670 sizeof(struct il_addsta_cmd));
3671 spin_unlock_irqrestore(&il->sta_lock, flags);
3672
3673 return il_send_add_sta(il, &sta_cmd, CMD_SYNC);
3674}
3675
3676void
3677il4965_sta_modify_sleep_tx_count(struct il_priv *il, int sta_id, int cnt)
3678{
3679 unsigned long flags;
3680
3681 spin_lock_irqsave(&il->sta_lock, flags);
3682 il->stations[sta_id].sta.station_flags |= STA_FLG_PWR_SAVE_MSK;
3683 il->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
3684 il->stations[sta_id].sta.sta.modify_mask =
3685 STA_MODIFY_SLEEP_TX_COUNT_MSK;
3686 il->stations[sta_id].sta.sleep_tx_count = cpu_to_le16(cnt);
3687 il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3688 il_send_add_sta(il, &il->stations[sta_id].sta, CMD_ASYNC);
3689 spin_unlock_irqrestore(&il->sta_lock, flags);
3690
3691}
3692
3693void
3694il4965_update_chain_flags(struct il_priv *il)
3695{
3696 if (il->ops->set_rxon_chain) {
3697 il->ops->set_rxon_chain(il);
3698 if (il->active.rx_chain != il->staging.rx_chain)
3699 il_commit_rxon(il);
3700 }
3701}
3702
3703static void
3704il4965_clear_free_frames(struct il_priv *il)
3705{
3706 struct list_head *element;
3707
3708 D_INFO("%d frames on pre-allocated heap on clear.\n", il->frames_count);
3709
3710 while (!list_empty(&il->free_frames)) {
3711 element = il->free_frames.next;
3712 list_del(element);
3713 kfree(list_entry(element, struct il_frame, list));
3714 il->frames_count--;
3715 }
3716
3717 if (il->frames_count) {
3718 IL_WARN("%d frames still in use. Did we lose one?\n",
3719 il->frames_count);
3720 il->frames_count = 0;
3721 }
3722}
3723
3724static struct il_frame *
3725il4965_get_free_frame(struct il_priv *il)
3726{
3727 struct il_frame *frame;
3728 struct list_head *element;
3729 if (list_empty(&il->free_frames)) {
3730 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
3731 if (!frame) {
3732 IL_ERR("Could not allocate frame!\n");
3733 return NULL;
3734 }
3735
3736 il->frames_count++;
3737 return frame;
3738 }
3739
3740 element = il->free_frames.next;
3741 list_del(element);
3742 return list_entry(element, struct il_frame, list);
3743}
3744
3745static void
3746il4965_free_frame(struct il_priv *il, struct il_frame *frame)
3747{
3748 memset(frame, 0, sizeof(*frame));
3749 list_add(&frame->list, &il->free_frames);
3750}
3751
3752static u32
3753il4965_fill_beacon_frame(struct il_priv *il, struct ieee80211_hdr *hdr,
3754 int left)
3755{
3756 lockdep_assert_held(&il->mutex);
3757
3758 if (!il->beacon_skb)
3759 return 0;
3760
3761 if (il->beacon_skb->len > left)
3762 return 0;
3763
3764 memcpy(hdr, il->beacon_skb->data, il->beacon_skb->len);
3765
3766 return il->beacon_skb->len;
3767}
3768
3769/* Parse the beacon frame to find the TIM element and set tim_idx & tim_size */
3770static void
3771il4965_set_beacon_tim(struct il_priv *il,
3772 struct il_tx_beacon_cmd *tx_beacon_cmd, u8 * beacon,
3773 u32 frame_size)
3774{
3775 u16 tim_idx;
3776 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon;
3777
3778 /*
3779 * The idx is relative to frame start but we start looking at the
3780 * variable-length part of the beacon.
3781 */
3782 tim_idx = mgmt->u.beacon.variable - beacon;
3783
3784 /* Parse variable-length elements of beacon to find WLAN_EID_TIM */
3785 while ((tim_idx < (frame_size - 2)) &&
3786 (beacon[tim_idx] != WLAN_EID_TIM))
3787 tim_idx += beacon[tim_idx + 1] + 2;
3788
3789 /* If TIM field was found, set variables */
3790 if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) {
3791 tx_beacon_cmd->tim_idx = cpu_to_le16(tim_idx);
3792 tx_beacon_cmd->tim_size = beacon[tim_idx + 1];
3793 } else
3794 IL_WARN("Unable to find TIM Element in beacon\n");
3795}
3796
3797static unsigned int
3798il4965_hw_get_beacon_cmd(struct il_priv *il, struct il_frame *frame)
3799{
3800 struct il_tx_beacon_cmd *tx_beacon_cmd;
3801 u32 frame_size;
3802 u32 rate_flags;
3803 u32 rate;
3804 /*
3805 * We have to set up the TX command, the TX Beacon command, and the
3806 * beacon contents.
3807 */
3808
3809 lockdep_assert_held(&il->mutex);
3810
3811 if (!il->beacon_enabled) {
3812 IL_ERR("Trying to build beacon without beaconing enabled\n");
3813 return 0;
3814 }
3815
3816 /* Initialize memory */
3817 tx_beacon_cmd = &frame->u.beacon;
3818 memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
3819
3820 /* Set up TX beacon contents */
3821 frame_size =
3822 il4965_fill_beacon_frame(il, tx_beacon_cmd->frame,
3823 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
3824 if (WARN_ON_ONCE(frame_size > MAX_MPDU_SIZE))
3825 return 0;
3826 if (!frame_size)
3827 return 0;
3828
3829 /* Set up TX command fields */
3830 tx_beacon_cmd->tx.len = cpu_to_le16((u16) frame_size);
3831 tx_beacon_cmd->tx.sta_id = il->hw_params.bcast_id;
3832 tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
3833 tx_beacon_cmd->tx.tx_flags =
3834 TX_CMD_FLG_SEQ_CTL_MSK | TX_CMD_FLG_TSF_MSK |
3835 TX_CMD_FLG_STA_RATE_MSK;
3836
3837 /* Set up TX beacon command fields */
3838 il4965_set_beacon_tim(il, tx_beacon_cmd, (u8 *) tx_beacon_cmd->frame,
3839 frame_size);
3840
3841 /* Set up packet rate and flags */
3842 rate = il_get_lowest_plcp(il);
3843 il4965_toggle_tx_ant(il, &il->mgmt_tx_ant, il->hw_params.valid_tx_ant);
3844 rate_flags = BIT(il->mgmt_tx_ant) << RATE_MCS_ANT_POS;
3845 if ((rate >= IL_FIRST_CCK_RATE) && (rate <= IL_LAST_CCK_RATE))
3846 rate_flags |= RATE_MCS_CCK_MSK;
3847 tx_beacon_cmd->tx.rate_n_flags = cpu_to_le32(rate | rate_flags);
3848
3849 return sizeof(*tx_beacon_cmd) + frame_size;
3850}
3851
3852int
3853il4965_send_beacon_cmd(struct il_priv *il)
3854{
3855 struct il_frame *frame;
3856 unsigned int frame_size;
3857 int rc;
3858
3859 frame = il4965_get_free_frame(il);
3860 if (!frame) {
3861 IL_ERR("Could not obtain free frame buffer for beacon "
3862 "command.\n");
3863 return -ENOMEM;
3864 }
3865
3866 frame_size = il4965_hw_get_beacon_cmd(il, frame);
3867 if (!frame_size) {
3868 IL_ERR("Error configuring the beacon command\n");
3869 il4965_free_frame(il, frame);
3870 return -EINVAL;
3871 }
3872
3873 rc = il_send_cmd_pdu(il, C_TX_BEACON, frame_size, &frame->u.cmd[0]);
3874
3875 il4965_free_frame(il, frame);
3876
3877 return rc;
3878}
3879
3880static inline dma_addr_t
3881il4965_tfd_tb_get_addr(struct il_tfd *tfd, u8 idx)
3882{
3883 struct il_tfd_tb *tb = &tfd->tbs[idx];
3884
3885 dma_addr_t addr = get_unaligned_le32(&tb->lo);
3886 if (sizeof(dma_addr_t) > sizeof(u32))
3887 addr |=
3888 ((dma_addr_t) (le16_to_cpu(tb->hi_n_len) & 0xF) << 16) <<
3889 16;
3890
3891 return addr;
3892}
3893
3894static inline u16
3895il4965_tfd_tb_get_len(struct il_tfd *tfd, u8 idx)
3896{
3897 struct il_tfd_tb *tb = &tfd->tbs[idx];
3898
3899 return le16_to_cpu(tb->hi_n_len) >> 4;
3900}
3901
3902static inline void
3903il4965_tfd_set_tb(struct il_tfd *tfd, u8 idx, dma_addr_t addr, u16 len)
3904{
3905 struct il_tfd_tb *tb = &tfd->tbs[idx];
3906 u16 hi_n_len = len << 4;
3907
3908 put_unaligned_le32(addr, &tb->lo);
3909 if (sizeof(dma_addr_t) > sizeof(u32))
3910 hi_n_len |= ((addr >> 16) >> 16) & 0xF;
3911
3912 tb->hi_n_len = cpu_to_le16(hi_n_len);
3913
3914 tfd->num_tbs = idx + 1;
3915}
3916
3917static inline u8
3918il4965_tfd_get_num_tbs(struct il_tfd *tfd)
3919{
3920 return tfd->num_tbs & 0x1f;
3921}
3922
3923/**
3924 * il4965_hw_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr]
3925 * @il - driver ilate data
3926 * @txq - tx queue
3927 *
3928 * Does NOT advance any TFD circular buffer read/write idxes
3929 * Does NOT free the TFD itself (which is within circular buffer)
3930 */
3931void
3932il4965_hw_txq_free_tfd(struct il_priv *il, struct il_tx_queue *txq)
3933{
3934 struct il_tfd *tfd_tmp = (struct il_tfd *)txq->tfds;
3935 struct il_tfd *tfd;
3936 struct pci_dev *dev = il->pci_dev;
3937 int idx = txq->q.read_ptr;
3938 int i;
3939 int num_tbs;
3940
3941 tfd = &tfd_tmp[idx];
3942
3943 /* Sanity check on number of chunks */
3944 num_tbs = il4965_tfd_get_num_tbs(tfd);
3945
3946 if (num_tbs >= IL_NUM_OF_TBS) {
3947 IL_ERR("Too many chunks: %i\n", num_tbs);
3948 /* @todo issue fatal error, it is quite serious situation */
3949 return;
3950 }
3951
3952 /* Unmap tx_cmd */
3953 if (num_tbs)
3954 pci_unmap_single(dev, dma_unmap_addr(&txq->meta[idx], mapping),
3955 dma_unmap_len(&txq->meta[idx], len),
3956 PCI_DMA_BIDIRECTIONAL);
3957
3958 /* Unmap chunks, if any. */
3959 for (i = 1; i < num_tbs; i++)
3960 pci_unmap_single(dev, il4965_tfd_tb_get_addr(tfd, i),
3961 il4965_tfd_tb_get_len(tfd, i),
3962 PCI_DMA_TODEVICE);
3963
3964 /* free SKB */
3965 if (txq->skbs) {
3966 struct sk_buff *skb = txq->skbs[txq->q.read_ptr];
3967
3968 /* can be called from irqs-disabled context */
3969 if (skb) {
3970 dev_kfree_skb_any(skb);
3971 txq->skbs[txq->q.read_ptr] = NULL;
3972 }
3973 }
3974}
3975
3976int
3977il4965_hw_txq_attach_buf_to_tfd(struct il_priv *il, struct il_tx_queue *txq,
3978 dma_addr_t addr, u16 len, u8 reset, u8 pad)
3979{
3980 struct il_queue *q;
3981 struct il_tfd *tfd, *tfd_tmp;
3982 u32 num_tbs;
3983
3984 q = &txq->q;
3985 tfd_tmp = (struct il_tfd *)txq->tfds;
3986 tfd = &tfd_tmp[q->write_ptr];
3987
3988 if (reset)
3989 memset(tfd, 0, sizeof(*tfd));
3990
3991 num_tbs = il4965_tfd_get_num_tbs(tfd);
3992
3993 /* Each TFD can point to a maximum 20 Tx buffers */
3994 if (num_tbs >= IL_NUM_OF_TBS) {
3995 IL_ERR("Error can not send more than %d chunks\n",
3996 IL_NUM_OF_TBS);
3997 return -EINVAL;
3998 }
3999
4000 BUG_ON(addr & ~DMA_BIT_MASK(36));
4001 if (unlikely(addr & ~IL_TX_DMA_MASK))
4002 IL_ERR("Unaligned address = %llx\n", (unsigned long long)addr);
4003
4004 il4965_tfd_set_tb(tfd, num_tbs, addr, len);
4005
4006 return 0;
4007}
4008
4009/*
4010 * Tell nic where to find circular buffer of Tx Frame Descriptors for
4011 * given Tx queue, and enable the DMA channel used for that queue.
4012 *
4013 * 4965 supports up to 16 Tx queues in DRAM, mapped to up to 8 Tx DMA
4014 * channels supported in hardware.
4015 */
4016int
4017il4965_hw_tx_queue_init(struct il_priv *il, struct il_tx_queue *txq)
4018{
4019 int txq_id = txq->q.id;
4020
4021 /* Circular buffer (TFD queue in DRAM) physical base address */
4022 il_wr(il, FH49_MEM_CBBC_QUEUE(txq_id), txq->q.dma_addr >> 8);
4023
4024 return 0;
4025}
4026
4027/******************************************************************************
4028 *
4029 * Generic RX handler implementations
4030 *
4031 ******************************************************************************/
4032static void
4033il4965_hdl_alive(struct il_priv *il, struct il_rx_buf *rxb)
4034{
4035 struct il_rx_pkt *pkt = rxb_addr(rxb);
4036 struct il_alive_resp *palive;
4037 struct delayed_work *pwork;
4038
4039 palive = &pkt->u.alive_frame;
4040
4041 D_INFO("Alive ucode status 0x%08X revision " "0x%01X 0x%01X\n",
4042 palive->is_valid, palive->ver_type, palive->ver_subtype);
4043
4044 if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
4045 D_INFO("Initialization Alive received.\n");
4046 memcpy(&il->card_alive_init, &pkt->u.alive_frame,
4047 sizeof(struct il_init_alive_resp));
4048 pwork = &il->init_alive_start;
4049 } else {
4050 D_INFO("Runtime Alive received.\n");
4051 memcpy(&il->card_alive, &pkt->u.alive_frame,
4052 sizeof(struct il_alive_resp));
4053 pwork = &il->alive_start;
4054 }
4055
4056 /* We delay the ALIVE response by 5ms to
4057 * give the HW RF Kill time to activate... */
4058 if (palive->is_valid == UCODE_VALID_OK)
4059 queue_delayed_work(il->workqueue, pwork, msecs_to_jiffies(5));
4060 else
4061 IL_WARN("uCode did not respond OK.\n");
4062}
4063
4064/**
4065 * il4965_bg_stats_periodic - Timer callback to queue stats
4066 *
4067 * This callback is provided in order to send a stats request.
4068 *
4069 * This timer function is continually reset to execute within
4070 * 60 seconds since the last N_STATS was received. We need to
4071 * ensure we receive the stats in order to update the temperature
4072 * used for calibrating the TXPOWER.
4073 */
4074static void
4075il4965_bg_stats_periodic(unsigned long data)
4076{
4077 struct il_priv *il = (struct il_priv *)data;
4078
4079 if (test_bit(S_EXIT_PENDING, &il->status))
4080 return;
4081
4082 /* dont send host command if rf-kill is on */
4083 if (!il_is_ready_rf(il))
4084 return;
4085
4086 il_send_stats_request(il, CMD_ASYNC, false);
4087}
4088
4089static void
4090il4965_hdl_beacon(struct il_priv *il, struct il_rx_buf *rxb)
4091{
4092 struct il_rx_pkt *pkt = rxb_addr(rxb);
4093 struct il4965_beacon_notif *beacon =
4094 (struct il4965_beacon_notif *)pkt->u.raw;
4095#ifdef CONFIG_IWLEGACY_DEBUG
4096 u8 rate = il4965_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
4097
4098 D_RX("beacon status %x retries %d iss %d tsf:0x%.8x%.8x rate %d\n",
4099 le32_to_cpu(beacon->beacon_notify_hdr.u.status) & TX_STATUS_MSK,
4100 beacon->beacon_notify_hdr.failure_frame,
4101 le32_to_cpu(beacon->ibss_mgr_status),
4102 le32_to_cpu(beacon->high_tsf), le32_to_cpu(beacon->low_tsf), rate);
4103#endif
4104 il->ibss_manager = le32_to_cpu(beacon->ibss_mgr_status);
4105}
4106
4107static void
4108il4965_perform_ct_kill_task(struct il_priv *il)
4109{
4110 unsigned long flags;
4111
4112 D_POWER("Stop all queues\n");
4113
4114 if (il->mac80211_registered)
4115 ieee80211_stop_queues(il->hw);
4116
4117 _il_wr(il, CSR_UCODE_DRV_GP1_SET,
4118 CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
4119 _il_rd(il, CSR_UCODE_DRV_GP1);
4120
4121 spin_lock_irqsave(&il->reg_lock, flags);
4122 if (likely(_il_grab_nic_access(il)))
4123 _il_release_nic_access(il);
4124 spin_unlock_irqrestore(&il->reg_lock, flags);
4125}
4126
4127/* Handle notification from uCode that card's power state is changing
4128 * due to software, hardware, or critical temperature RFKILL */
4129static void
4130il4965_hdl_card_state(struct il_priv *il, struct il_rx_buf *rxb)
4131{
4132 struct il_rx_pkt *pkt = rxb_addr(rxb);
4133 u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
4134 unsigned long status = il->status;
4135
4136 D_RF_KILL("Card state received: HW:%s SW:%s CT:%s\n",
4137 (flags & HW_CARD_DISABLED) ? "Kill" : "On",
4138 (flags & SW_CARD_DISABLED) ? "Kill" : "On",
4139 (flags & CT_CARD_DISABLED) ? "Reached" : "Not reached");
4140
4141 if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED | CT_CARD_DISABLED)) {
4142
4143 _il_wr(il, CSR_UCODE_DRV_GP1_SET,
4144 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
4145
4146 il_wr(il, HBUS_TARG_MBX_C, HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
4147
4148 if (!(flags & RXON_CARD_DISABLED)) {
4149 _il_wr(il, CSR_UCODE_DRV_GP1_CLR,
4150 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
4151 il_wr(il, HBUS_TARG_MBX_C,
4152 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
4153 }
4154 }
4155
4156 if (flags & CT_CARD_DISABLED)
4157 il4965_perform_ct_kill_task(il);
4158
4159 if (flags & HW_CARD_DISABLED)
4160 set_bit(S_RFKILL, &il->status);
4161 else
4162 clear_bit(S_RFKILL, &il->status);
4163
4164 if (!(flags & RXON_CARD_DISABLED))
4165 il_scan_cancel(il);
4166
4167 if ((test_bit(S_RFKILL, &status) !=
4168 test_bit(S_RFKILL, &il->status)))
4169 wiphy_rfkill_set_hw_state(il->hw->wiphy,
4170 test_bit(S_RFKILL, &il->status));
4171 else
4172 wake_up(&il->wait_command_queue);
4173}
4174
4175/**
4176 * il4965_setup_handlers - Initialize Rx handler callbacks
4177 *
4178 * Setup the RX handlers for each of the reply types sent from the uCode
4179 * to the host.
4180 *
4181 * This function chains into the hardware specific files for them to setup
4182 * any hardware specific handlers as well.
4183 */
4184static void
4185il4965_setup_handlers(struct il_priv *il)
4186{
4187 il->handlers[N_ALIVE] = il4965_hdl_alive;
4188 il->handlers[N_ERROR] = il_hdl_error;
4189 il->handlers[N_CHANNEL_SWITCH] = il_hdl_csa;
4190 il->handlers[N_SPECTRUM_MEASUREMENT] = il_hdl_spectrum_measurement;
4191 il->handlers[N_PM_SLEEP] = il_hdl_pm_sleep;
4192 il->handlers[N_PM_DEBUG_STATS] = il_hdl_pm_debug_stats;
4193 il->handlers[N_BEACON] = il4965_hdl_beacon;
4194
4195 /*
4196 * The same handler is used for both the REPLY to a discrete
4197 * stats request from the host as well as for the periodic
4198 * stats notifications (after received beacons) from the uCode.
4199 */
4200 il->handlers[C_STATS] = il4965_hdl_c_stats;
4201 il->handlers[N_STATS] = il4965_hdl_stats;
4202
4203 il_setup_rx_scan_handlers(il);
4204
4205 /* status change handler */
4206 il->handlers[N_CARD_STATE] = il4965_hdl_card_state;
4207
4208 il->handlers[N_MISSED_BEACONS] = il4965_hdl_missed_beacon;
4209 /* Rx handlers */
4210 il->handlers[N_RX_PHY] = il4965_hdl_rx_phy;
4211 il->handlers[N_RX_MPDU] = il4965_hdl_rx;
4212 il->handlers[N_RX] = il4965_hdl_rx;
4213 /* block ack */
4214 il->handlers[N_COMPRESSED_BA] = il4965_hdl_compressed_ba;
4215 /* Tx response */
4216 il->handlers[C_TX] = il4965_hdl_tx;
4217}
4218
4219/**
4220 * il4965_rx_handle - Main entry function for receiving responses from uCode
4221 *
4222 * Uses the il->handlers callback function array to invoke
4223 * the appropriate handlers, including command responses,
4224 * frame-received notifications, and other notifications.
4225 */
4226void
4227il4965_rx_handle(struct il_priv *il)
4228{
4229 struct il_rx_buf *rxb;
4230 struct il_rx_pkt *pkt;
4231 struct il_rx_queue *rxq = &il->rxq;
4232 u32 r, i;
4233 int reclaim;
4234 unsigned long flags;
4235 u8 fill_rx = 0;
4236 u32 count = 8;
4237 int total_empty;
4238
4239 /* uCode's read idx (stored in shared DRAM) indicates the last Rx
4240 * buffer that the driver may process (last buffer filled by ucode). */
4241 r = le16_to_cpu(rxq->rb_stts->closed_rb_num) & 0x0FFF;
4242 i = rxq->read;
4243
4244 /* Rx interrupt, but nothing sent from uCode */
4245 if (i == r)
4246 D_RX("r = %d, i = %d\n", r, i);
4247
4248 /* calculate total frames need to be restock after handling RX */
4249 total_empty = r - rxq->write_actual;
4250 if (total_empty < 0)
4251 total_empty += RX_QUEUE_SIZE;
4252
4253 if (total_empty > (RX_QUEUE_SIZE / 2))
4254 fill_rx = 1;
4255
4256 while (i != r) {
4257 int len;
4258
4259 rxb = rxq->queue[i];
4260
4261 /* If an RXB doesn't have a Rx queue slot associated with it,
4262 * then a bug has been introduced in the queue refilling
4263 * routines -- catch it here */
4264 BUG_ON(rxb == NULL);
4265
4266 rxq->queue[i] = NULL;
4267
4268 pci_unmap_page(il->pci_dev, rxb->page_dma,
4269 PAGE_SIZE << il->hw_params.rx_page_order,
4270 PCI_DMA_FROMDEVICE);
4271 pkt = rxb_addr(rxb);
4272
4273 len = le32_to_cpu(pkt->len_n_flags) & IL_RX_FRAME_SIZE_MSK;
4274 len += sizeof(u32); /* account for status word */
4275
4276 reclaim = il_need_reclaim(il, pkt);
4277
4278 /* Based on type of command response or notification,
4279 * handle those that need handling via function in
4280 * handlers table. See il4965_setup_handlers() */
4281 if (il->handlers[pkt->hdr.cmd]) {
4282 D_RX("r = %d, i = %d, %s, 0x%02x\n", r, i,
4283 il_get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
4284 il->isr_stats.handlers[pkt->hdr.cmd]++;
4285 il->handlers[pkt->hdr.cmd] (il, rxb);
4286 } else {
4287 /* No handling needed */
4288 D_RX("r %d i %d No handler needed for %s, 0x%02x\n", r,
4289 i, il_get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
4290 }
4291
4292 /*
4293 * XXX: After here, we should always check rxb->page
4294 * against NULL before touching it or its virtual
4295 * memory (pkt). Because some handler might have
4296 * already taken or freed the pages.
4297 */
4298
4299 if (reclaim) {
4300 /* Invoke any callbacks, transfer the buffer to caller,
4301 * and fire off the (possibly) blocking il_send_cmd()
4302 * as we reclaim the driver command queue */
4303 if (rxb->page)
4304 il_tx_cmd_complete(il, rxb);
4305 else
4306 IL_WARN("Claim null rxb?\n");
4307 }
4308
4309 /* Reuse the page if possible. For notification packets and
4310 * SKBs that fail to Rx correctly, add them back into the
4311 * rx_free list for reuse later. */
4312 spin_lock_irqsave(&rxq->lock, flags);
4313 if (rxb->page != NULL) {
4314 rxb->page_dma =
4315 pci_map_page(il->pci_dev, rxb->page, 0,
4316 PAGE_SIZE << il->hw_params.
4317 rx_page_order, PCI_DMA_FROMDEVICE);
4318
4319 if (unlikely(pci_dma_mapping_error(il->pci_dev,
4320 rxb->page_dma))) {
4321 __il_free_pages(il, rxb->page);
4322 rxb->page = NULL;
4323 list_add_tail(&rxb->list, &rxq->rx_used);
4324 } else {
4325 list_add_tail(&rxb->list, &rxq->rx_free);
4326 rxq->free_count++;
4327 }
4328 } else
4329 list_add_tail(&rxb->list, &rxq->rx_used);
4330
4331 spin_unlock_irqrestore(&rxq->lock, flags);
4332
4333 i = (i + 1) & RX_QUEUE_MASK;
4334 /* If there are a lot of unused frames,
4335 * restock the Rx queue so ucode wont assert. */
4336 if (fill_rx) {
4337 count++;
4338 if (count >= 8) {
4339 rxq->read = i;
4340 il4965_rx_replenish_now(il);
4341 count = 0;
4342 }
4343 }
4344 }
4345
4346 /* Backtrack one entry */
4347 rxq->read = i;
4348 if (fill_rx)
4349 il4965_rx_replenish_now(il);
4350 else
4351 il4965_rx_queue_restock(il);
4352}
4353
4354/* call this function to flush any scheduled tasklet */
4355static inline void
4356il4965_synchronize_irq(struct il_priv *il)
4357{
4358 /* wait to make sure we flush pending tasklet */
4359 synchronize_irq(il->pci_dev->irq);
4360 tasklet_kill(&il->irq_tasklet);
4361}
4362
4363static void
4364il4965_irq_tasklet(struct il_priv *il)
4365{
4366 u32 inta, handled = 0;
4367 u32 inta_fh;
4368 unsigned long flags;
4369 u32 i;
4370#ifdef CONFIG_IWLEGACY_DEBUG
4371 u32 inta_mask;
4372#endif
4373
4374 spin_lock_irqsave(&il->lock, flags);
4375
4376 /* Ack/clear/reset pending uCode interrupts.
4377 * Note: Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
4378 * and will clear only when CSR_FH_INT_STATUS gets cleared. */
4379 inta = _il_rd(il, CSR_INT);
4380 _il_wr(il, CSR_INT, inta);
4381
4382 /* Ack/clear/reset pending flow-handler (DMA) interrupts.
4383 * Any new interrupts that happen after this, either while we're
4384 * in this tasklet, or later, will show up in next ISR/tasklet. */
4385 inta_fh = _il_rd(il, CSR_FH_INT_STATUS);
4386 _il_wr(il, CSR_FH_INT_STATUS, inta_fh);
4387
4388#ifdef CONFIG_IWLEGACY_DEBUG
4389 if (il_get_debug_level(il) & IL_DL_ISR) {
4390 /* just for debug */
4391 inta_mask = _il_rd(il, CSR_INT_MASK);
4392 D_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n", inta,
4393 inta_mask, inta_fh);
4394 }
4395#endif
4396
4397 spin_unlock_irqrestore(&il->lock, flags);
4398
4399 /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
4400 * atomic, make sure that inta covers all the interrupts that
4401 * we've discovered, even if FH interrupt came in just after
4402 * reading CSR_INT. */
4403 if (inta_fh & CSR49_FH_INT_RX_MASK)
4404 inta |= CSR_INT_BIT_FH_RX;
4405 if (inta_fh & CSR49_FH_INT_TX_MASK)
4406 inta |= CSR_INT_BIT_FH_TX;
4407
4408 /* Now service all interrupt bits discovered above. */
4409 if (inta & CSR_INT_BIT_HW_ERR) {
4410 IL_ERR("Hardware error detected. Restarting.\n");
4411
4412 /* Tell the device to stop sending interrupts */
4413 il_disable_interrupts(il);
4414
4415 il->isr_stats.hw++;
4416 il_irq_handle_error(il);
4417
4418 handled |= CSR_INT_BIT_HW_ERR;
4419
4420 return;
4421 }
4422#ifdef CONFIG_IWLEGACY_DEBUG
4423 if (il_get_debug_level(il) & (IL_DL_ISR)) {
4424 /* NIC fires this, but we don't use it, redundant with WAKEUP */
4425 if (inta & CSR_INT_BIT_SCD) {
4426 D_ISR("Scheduler finished to transmit "
4427 "the frame/frames.\n");
4428 il->isr_stats.sch++;
4429 }
4430
4431 /* Alive notification via Rx interrupt will do the real work */
4432 if (inta & CSR_INT_BIT_ALIVE) {
4433 D_ISR("Alive interrupt\n");
4434 il->isr_stats.alive++;
4435 }
4436 }
4437#endif
4438 /* Safely ignore these bits for debug checks below */
4439 inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
4440
4441 /* HW RF KILL switch toggled */
4442 if (inta & CSR_INT_BIT_RF_KILL) {
4443 int hw_rf_kill = 0;
4444
4445 if (!(_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
4446 hw_rf_kill = 1;
4447
4448 IL_WARN("RF_KILL bit toggled to %s.\n",
4449 hw_rf_kill ? "disable radio" : "enable radio");
4450
4451 il->isr_stats.rfkill++;
4452
4453 /* driver only loads ucode once setting the interface up.
4454 * the driver allows loading the ucode even if the radio
4455 * is killed. Hence update the killswitch state here. The
4456 * rfkill handler will care about restarting if needed.
4457 */
4458 if (hw_rf_kill) {
4459 set_bit(S_RFKILL, &il->status);
4460 } else {
4461 clear_bit(S_RFKILL, &il->status);
4462 il_force_reset(il, true);
4463 }
4464 wiphy_rfkill_set_hw_state(il->hw->wiphy, hw_rf_kill);
4465
4466 handled |= CSR_INT_BIT_RF_KILL;
4467 }
4468
4469 /* Chip got too hot and stopped itself */
4470 if (inta & CSR_INT_BIT_CT_KILL) {
4471 IL_ERR("Microcode CT kill error detected.\n");
4472 il->isr_stats.ctkill++;
4473 handled |= CSR_INT_BIT_CT_KILL;
4474 }
4475
4476 /* Error detected by uCode */
4477 if (inta & CSR_INT_BIT_SW_ERR) {
4478 IL_ERR("Microcode SW error detected. " " Restarting 0x%X.\n",
4479 inta);
4480 il->isr_stats.sw++;
4481 il_irq_handle_error(il);
4482 handled |= CSR_INT_BIT_SW_ERR;
4483 }
4484
4485 /*
4486 * uCode wakes up after power-down sleep.
4487 * Tell device about any new tx or host commands enqueued,
4488 * and about any Rx buffers made available while asleep.
4489 */
4490 if (inta & CSR_INT_BIT_WAKEUP) {
4491 D_ISR("Wakeup interrupt\n");
4492 il_rx_queue_update_write_ptr(il, &il->rxq);
4493 for (i = 0; i < il->hw_params.max_txq_num; i++)
4494 il_txq_update_write_ptr(il, &il->txq[i]);
4495 il->isr_stats.wakeup++;
4496 handled |= CSR_INT_BIT_WAKEUP;
4497 }
4498
4499 /* All uCode command responses, including Tx command responses,
4500 * Rx "responses" (frame-received notification), and other
4501 * notifications from uCode come through here*/
4502 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
4503 il4965_rx_handle(il);
4504 il->isr_stats.rx++;
4505 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
4506 }
4507
4508 /* This "Tx" DMA channel is used only for loading uCode */
4509 if (inta & CSR_INT_BIT_FH_TX) {
4510 D_ISR("uCode load interrupt\n");
4511 il->isr_stats.tx++;
4512 handled |= CSR_INT_BIT_FH_TX;
4513 /* Wake up uCode load routine, now that load is complete */
4514 il->ucode_write_complete = 1;
4515 wake_up(&il->wait_command_queue);
4516 }
4517
4518 if (inta & ~handled) {
4519 IL_ERR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
4520 il->isr_stats.unhandled++;
4521 }
4522
4523 if (inta & ~(il->inta_mask)) {
4524 IL_WARN("Disabled INTA bits 0x%08x were pending\n",
4525 inta & ~il->inta_mask);
4526 IL_WARN(" with FH49_INT = 0x%08x\n", inta_fh);
4527 }
4528
4529 /* Re-enable all interrupts */
4530 /* only Re-enable if disabled by irq */
4531 if (test_bit(S_INT_ENABLED, &il->status))
4532 il_enable_interrupts(il);
4533 /* Re-enable RF_KILL if it occurred */
4534 else if (handled & CSR_INT_BIT_RF_KILL)
4535 il_enable_rfkill_int(il);
4536
4537#ifdef CONFIG_IWLEGACY_DEBUG
4538 if (il_get_debug_level(il) & (IL_DL_ISR)) {
4539 inta = _il_rd(il, CSR_INT);
4540 inta_mask = _il_rd(il, CSR_INT_MASK);
4541 inta_fh = _il_rd(il, CSR_FH_INT_STATUS);
4542 D_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
4543 "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
4544 }
4545#endif
4546}
4547
4548/*****************************************************************************
4549 *
4550 * sysfs attributes
4551 *
4552 *****************************************************************************/
4553
4554#ifdef CONFIG_IWLEGACY_DEBUG
4555
4556/*
4557 * The following adds a new attribute to the sysfs representation
4558 * of this device driver (i.e. a new file in /sys/class/net/wlan0/device/)
4559 * used for controlling the debug level.
4560 *
4561 * See the level definitions in iwl for details.
4562 *
4563 * The debug_level being managed using sysfs below is a per device debug
4564 * level that is used instead of the global debug level if it (the per
4565 * device debug level) is set.
4566 */
4567static ssize_t
4568il4965_show_debug_level(struct device *d, struct device_attribute *attr,
4569 char *buf)
4570{
4571 struct il_priv *il = dev_get_drvdata(d);
4572 return sprintf(buf, "0x%08X\n", il_get_debug_level(il));
4573}
4574
4575static ssize_t
4576il4965_store_debug_level(struct device *d, struct device_attribute *attr,
4577 const char *buf, size_t count)
4578{
4579 struct il_priv *il = dev_get_drvdata(d);
4580 unsigned long val;
4581 int ret;
4582
4583 ret = kstrtoul(buf, 0, &val);
4584 if (ret)
4585 IL_ERR("%s is not in hex or decimal form.\n", buf);
4586 else
4587 il->debug_level = val;
4588
4589 return strnlen(buf, count);
4590}
4591
4592static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO, il4965_show_debug_level,
4593 il4965_store_debug_level);
4594
4595#endif /* CONFIG_IWLEGACY_DEBUG */
4596
4597static ssize_t
4598il4965_show_temperature(struct device *d, struct device_attribute *attr,
4599 char *buf)
4600{
4601 struct il_priv *il = dev_get_drvdata(d);
4602
4603 if (!il_is_alive(il))
4604 return -EAGAIN;
4605
4606 return sprintf(buf, "%d\n", il->temperature);
4607}
4608
4609static DEVICE_ATTR(temperature, S_IRUGO, il4965_show_temperature, NULL);
4610
4611static ssize_t
4612il4965_show_tx_power(struct device *d, struct device_attribute *attr, char *buf)
4613{
4614 struct il_priv *il = dev_get_drvdata(d);
4615
4616 if (!il_is_ready_rf(il))
4617 return sprintf(buf, "off\n");
4618 else
4619 return sprintf(buf, "%d\n", il->tx_power_user_lmt);
4620}
4621
4622static ssize_t
4623il4965_store_tx_power(struct device *d, struct device_attribute *attr,
4624 const char *buf, size_t count)
4625{
4626 struct il_priv *il = dev_get_drvdata(d);
4627 unsigned long val;
4628 int ret;
4629
4630 ret = kstrtoul(buf, 10, &val);
4631 if (ret)
4632 IL_INFO("%s is not in decimal form.\n", buf);
4633 else {
4634 ret = il_set_tx_power(il, val, false);
4635 if (ret)
4636 IL_ERR("failed setting tx power (0x%08x).\n", ret);
4637 else
4638 ret = count;
4639 }
4640 return ret;
4641}
4642
4643static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, il4965_show_tx_power,
4644 il4965_store_tx_power);
4645
4646static struct attribute *il_sysfs_entries[] = {
4647 &dev_attr_temperature.attr,
4648 &dev_attr_tx_power.attr,
4649#ifdef CONFIG_IWLEGACY_DEBUG
4650 &dev_attr_debug_level.attr,
4651#endif
4652 NULL
4653};
4654
4655static struct attribute_group il_attribute_group = {
4656 .name = NULL, /* put in device directory */
4657 .attrs = il_sysfs_entries,
4658};
4659
4660/******************************************************************************
4661 *
4662 * uCode download functions
4663 *
4664 ******************************************************************************/
4665
4666static void
4667il4965_dealloc_ucode_pci(struct il_priv *il)
4668{
4669 il_free_fw_desc(il->pci_dev, &il->ucode_code);
4670 il_free_fw_desc(il->pci_dev, &il->ucode_data);
4671 il_free_fw_desc(il->pci_dev, &il->ucode_data_backup);
4672 il_free_fw_desc(il->pci_dev, &il->ucode_init);
4673 il_free_fw_desc(il->pci_dev, &il->ucode_init_data);
4674 il_free_fw_desc(il->pci_dev, &il->ucode_boot);
4675}
4676
4677static void
4678il4965_nic_start(struct il_priv *il)
4679{
4680 /* Remove all resets to allow NIC to operate */
4681 _il_wr(il, CSR_RESET, 0);
4682}
4683
4684static void il4965_ucode_callback(const struct firmware *ucode_raw,
4685 void *context);
4686static int il4965_mac_setup_register(struct il_priv *il, u32 max_probe_length);
4687
4688static int __must_check
4689il4965_request_firmware(struct il_priv *il, bool first)
4690{
4691 const char *name_pre = il->cfg->fw_name_pre;
4692 char tag[8];
4693
4694 if (first) {
4695 il->fw_idx = il->cfg->ucode_api_max;
4696 sprintf(tag, "%d", il->fw_idx);
4697 } else {
4698 il->fw_idx--;
4699 sprintf(tag, "%d", il->fw_idx);
4700 }
4701
4702 if (il->fw_idx < il->cfg->ucode_api_min) {
4703 IL_ERR("no suitable firmware found!\n");
4704 return -ENOENT;
4705 }
4706
4707 sprintf(il->firmware_name, "%s%s%s", name_pre, tag, ".ucode");
4708
4709 D_INFO("attempting to load firmware '%s'\n", il->firmware_name);
4710
4711 return request_firmware_nowait(THIS_MODULE, 1, il->firmware_name,
4712 &il->pci_dev->dev, GFP_KERNEL, il,
4713 il4965_ucode_callback);
4714}
4715
4716struct il4965_firmware_pieces {
4717 const void *inst, *data, *init, *init_data, *boot;
4718 size_t inst_size, data_size, init_size, init_data_size, boot_size;
4719};
4720
4721static int
4722il4965_load_firmware(struct il_priv *il, const struct firmware *ucode_raw,
4723 struct il4965_firmware_pieces *pieces)
4724{
4725 struct il_ucode_header *ucode = (void *)ucode_raw->data;
4726 u32 api_ver, hdr_size;
4727 const u8 *src;
4728
4729 il->ucode_ver = le32_to_cpu(ucode->ver);
4730 api_ver = IL_UCODE_API(il->ucode_ver);
4731
4732 switch (api_ver) {
4733 default:
4734 case 0:
4735 case 1:
4736 case 2:
4737 hdr_size = 24;
4738 if (ucode_raw->size < hdr_size) {
4739 IL_ERR("File size too small!\n");
4740 return -EINVAL;
4741 }
4742 pieces->inst_size = le32_to_cpu(ucode->v1.inst_size);
4743 pieces->data_size = le32_to_cpu(ucode->v1.data_size);
4744 pieces->init_size = le32_to_cpu(ucode->v1.init_size);
4745 pieces->init_data_size = le32_to_cpu(ucode->v1.init_data_size);
4746 pieces->boot_size = le32_to_cpu(ucode->v1.boot_size);
4747 src = ucode->v1.data;
4748 break;
4749 }
4750
4751 /* Verify size of file vs. image size info in file's header */
4752 if (ucode_raw->size !=
4753 hdr_size + pieces->inst_size + pieces->data_size +
4754 pieces->init_size + pieces->init_data_size + pieces->boot_size) {
4755
4756 IL_ERR("uCode file size %d does not match expected size\n",
4757 (int)ucode_raw->size);
4758 return -EINVAL;
4759 }
4760
4761 pieces->inst = src;
4762 src += pieces->inst_size;
4763 pieces->data = src;
4764 src += pieces->data_size;
4765 pieces->init = src;
4766 src += pieces->init_size;
4767 pieces->init_data = src;
4768 src += pieces->init_data_size;
4769 pieces->boot = src;
4770 src += pieces->boot_size;
4771
4772 return 0;
4773}
4774
4775/**
4776 * il4965_ucode_callback - callback when firmware was loaded
4777 *
4778 * If loaded successfully, copies the firmware into buffers
4779 * for the card to fetch (via DMA).
4780 */
4781static void
4782il4965_ucode_callback(const struct firmware *ucode_raw, void *context)
4783{
4784 struct il_priv *il = context;
4785 struct il_ucode_header *ucode;
4786 int err;
4787 struct il4965_firmware_pieces pieces;
4788 const unsigned int api_max = il->cfg->ucode_api_max;
4789 const unsigned int api_min = il->cfg->ucode_api_min;
4790 u32 api_ver;
4791
4792 u32 max_probe_length = 200;
4793 u32 standard_phy_calibration_size =
4794 IL_DEFAULT_STANDARD_PHY_CALIBRATE_TBL_SIZE;
4795
4796 memset(&pieces, 0, sizeof(pieces));
4797
4798 if (!ucode_raw) {
4799 if (il->fw_idx <= il->cfg->ucode_api_max)
4800 IL_ERR("request for firmware file '%s' failed.\n",
4801 il->firmware_name);
4802 goto try_again;
4803 }
4804
4805 D_INFO("Loaded firmware file '%s' (%zd bytes).\n", il->firmware_name,
4806 ucode_raw->size);
4807
4808 /* Make sure that we got at least the API version number */
4809 if (ucode_raw->size < 4) {
4810 IL_ERR("File size way too small!\n");
4811 goto try_again;
4812 }
4813
4814 /* Data from ucode file: header followed by uCode images */
4815 ucode = (struct il_ucode_header *)ucode_raw->data;
4816
4817 err = il4965_load_firmware(il, ucode_raw, &pieces);
4818
4819 if (err)
4820 goto try_again;
4821
4822 api_ver = IL_UCODE_API(il->ucode_ver);
4823
4824 /*
4825 * api_ver should match the api version forming part of the
4826 * firmware filename ... but we don't check for that and only rely
4827 * on the API version read from firmware header from here on forward
4828 */
4829 if (api_ver < api_min || api_ver > api_max) {
4830 IL_ERR("Driver unable to support your firmware API. "
4831 "Driver supports v%u, firmware is v%u.\n", api_max,
4832 api_ver);
4833 goto try_again;
4834 }
4835
4836 if (api_ver != api_max)
4837 IL_ERR("Firmware has old API version. Expected v%u, "
4838 "got v%u. New firmware can be obtained "
4839 "from http://www.intellinuxwireless.org.\n", api_max,
4840 api_ver);
4841
4842 IL_INFO("loaded firmware version %u.%u.%u.%u\n",
4843 IL_UCODE_MAJOR(il->ucode_ver), IL_UCODE_MINOR(il->ucode_ver),
4844 IL_UCODE_API(il->ucode_ver), IL_UCODE_SERIAL(il->ucode_ver));
4845
4846 snprintf(il->hw->wiphy->fw_version, sizeof(il->hw->wiphy->fw_version),
4847 "%u.%u.%u.%u", IL_UCODE_MAJOR(il->ucode_ver),
4848 IL_UCODE_MINOR(il->ucode_ver), IL_UCODE_API(il->ucode_ver),
4849 IL_UCODE_SERIAL(il->ucode_ver));
4850
4851 /*
4852 * For any of the failures below (before allocating pci memory)
4853 * we will try to load a version with a smaller API -- maybe the
4854 * user just got a corrupted version of the latest API.
4855 */
4856
4857 D_INFO("f/w package hdr ucode version raw = 0x%x\n", il->ucode_ver);
4858 D_INFO("f/w package hdr runtime inst size = %Zd\n", pieces.inst_size);
4859 D_INFO("f/w package hdr runtime data size = %Zd\n", pieces.data_size);
4860 D_INFO("f/w package hdr init inst size = %Zd\n", pieces.init_size);
4861 D_INFO("f/w package hdr init data size = %Zd\n", pieces.init_data_size);
4862 D_INFO("f/w package hdr boot inst size = %Zd\n", pieces.boot_size);
4863
4864 /* Verify that uCode images will fit in card's SRAM */
4865 if (pieces.inst_size > il->hw_params.max_inst_size) {
4866 IL_ERR("uCode instr len %Zd too large to fit in\n",
4867 pieces.inst_size);
4868 goto try_again;
4869 }
4870
4871 if (pieces.data_size > il->hw_params.max_data_size) {
4872 IL_ERR("uCode data len %Zd too large to fit in\n",
4873 pieces.data_size);
4874 goto try_again;
4875 }
4876
4877 if (pieces.init_size > il->hw_params.max_inst_size) {
4878 IL_ERR("uCode init instr len %Zd too large to fit in\n",
4879 pieces.init_size);
4880 goto try_again;
4881 }
4882
4883 if (pieces.init_data_size > il->hw_params.max_data_size) {
4884 IL_ERR("uCode init data len %Zd too large to fit in\n",
4885 pieces.init_data_size);
4886 goto try_again;
4887 }
4888
4889 if (pieces.boot_size > il->hw_params.max_bsm_size) {
4890 IL_ERR("uCode boot instr len %Zd too large to fit in\n",
4891 pieces.boot_size);
4892 goto try_again;
4893 }
4894
4895 /* Allocate ucode buffers for card's bus-master loading ... */
4896
4897 /* Runtime instructions and 2 copies of data:
4898 * 1) unmodified from disk
4899 * 2) backup cache for save/restore during power-downs */
4900 il->ucode_code.len = pieces.inst_size;
4901 il_alloc_fw_desc(il->pci_dev, &il->ucode_code);
4902
4903 il->ucode_data.len = pieces.data_size;
4904 il_alloc_fw_desc(il->pci_dev, &il->ucode_data);
4905
4906 il->ucode_data_backup.len = pieces.data_size;
4907 il_alloc_fw_desc(il->pci_dev, &il->ucode_data_backup);
4908
4909 if (!il->ucode_code.v_addr || !il->ucode_data.v_addr ||
4910 !il->ucode_data_backup.v_addr)
4911 goto err_pci_alloc;
4912
4913 /* Initialization instructions and data */
4914 if (pieces.init_size && pieces.init_data_size) {
4915 il->ucode_init.len = pieces.init_size;
4916 il_alloc_fw_desc(il->pci_dev, &il->ucode_init);
4917
4918 il->ucode_init_data.len = pieces.init_data_size;
4919 il_alloc_fw_desc(il->pci_dev, &il->ucode_init_data);
4920
4921 if (!il->ucode_init.v_addr || !il->ucode_init_data.v_addr)
4922 goto err_pci_alloc;
4923 }
4924
4925 /* Bootstrap (instructions only, no data) */
4926 if (pieces.boot_size) {
4927 il->ucode_boot.len = pieces.boot_size;
4928 il_alloc_fw_desc(il->pci_dev, &il->ucode_boot);
4929
4930 if (!il->ucode_boot.v_addr)
4931 goto err_pci_alloc;
4932 }
4933
4934 /* Now that we can no longer fail, copy information */
4935
4936 il->sta_key_max_num = STA_KEY_MAX_NUM;
4937
4938 /* Copy images into buffers for card's bus-master reads ... */
4939
4940 /* Runtime instructions (first block of data in file) */
4941 D_INFO("Copying (but not loading) uCode instr len %Zd\n",
4942 pieces.inst_size);
4943 memcpy(il->ucode_code.v_addr, pieces.inst, pieces.inst_size);
4944
4945 D_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
4946 il->ucode_code.v_addr, (u32) il->ucode_code.p_addr);
4947
4948 /*
4949 * Runtime data
4950 * NOTE: Copy into backup buffer will be done in il_up()
4951 */
4952 D_INFO("Copying (but not loading) uCode data len %Zd\n",
4953 pieces.data_size);
4954 memcpy(il->ucode_data.v_addr, pieces.data, pieces.data_size);
4955 memcpy(il->ucode_data_backup.v_addr, pieces.data, pieces.data_size);
4956
4957 /* Initialization instructions */
4958 if (pieces.init_size) {
4959 D_INFO("Copying (but not loading) init instr len %Zd\n",
4960 pieces.init_size);
4961 memcpy(il->ucode_init.v_addr, pieces.init, pieces.init_size);
4962 }
4963
4964 /* Initialization data */
4965 if (pieces.init_data_size) {
4966 D_INFO("Copying (but not loading) init data len %Zd\n",
4967 pieces.init_data_size);
4968 memcpy(il->ucode_init_data.v_addr, pieces.init_data,
4969 pieces.init_data_size);
4970 }
4971
4972 /* Bootstrap instructions */
4973 D_INFO("Copying (but not loading) boot instr len %Zd\n",
4974 pieces.boot_size);
4975 memcpy(il->ucode_boot.v_addr, pieces.boot, pieces.boot_size);
4976
4977 /*
4978 * figure out the offset of chain noise reset and gain commands
4979 * base on the size of standard phy calibration commands table size
4980 */
4981 il->_4965.phy_calib_chain_noise_reset_cmd =
4982 standard_phy_calibration_size;
4983 il->_4965.phy_calib_chain_noise_gain_cmd =
4984 standard_phy_calibration_size + 1;
4985
4986 /**************************************************
4987 * This is still part of probe() in a sense...
4988 *
4989 * 9. Setup and register with mac80211 and debugfs
4990 **************************************************/
4991 err = il4965_mac_setup_register(il, max_probe_length);
4992 if (err)
4993 goto out_unbind;
4994
4995 err = il_dbgfs_register(il, DRV_NAME);
4996 if (err)
4997 IL_ERR("failed to create debugfs files. Ignoring error: %d\n",
4998 err);
4999
5000 err = sysfs_create_group(&il->pci_dev->dev.kobj, &il_attribute_group);
5001 if (err) {
5002 IL_ERR("failed to create sysfs device attributes\n");
5003 goto out_unbind;
5004 }
5005
5006 /* We have our copies now, allow OS release its copies */
5007 release_firmware(ucode_raw);
5008 complete(&il->_4965.firmware_loading_complete);
5009 return;
5010
5011try_again:
5012 /* try next, if any */
5013 if (il4965_request_firmware(il, false))
5014 goto out_unbind;
5015 release_firmware(ucode_raw);
5016 return;
5017
5018err_pci_alloc:
5019 IL_ERR("failed to allocate pci memory\n");
5020 il4965_dealloc_ucode_pci(il);
5021out_unbind:
5022 complete(&il->_4965.firmware_loading_complete);
5023 device_release_driver(&il->pci_dev->dev);
5024 release_firmware(ucode_raw);
5025}
5026
5027static const char *const desc_lookup_text[] = {
5028 "OK",
5029 "FAIL",
5030 "BAD_PARAM",
5031 "BAD_CHECKSUM",
5032 "NMI_INTERRUPT_WDG",
5033 "SYSASSERT",
5034 "FATAL_ERROR",
5035 "BAD_COMMAND",
5036 "HW_ERROR_TUNE_LOCK",
5037 "HW_ERROR_TEMPERATURE",
5038 "ILLEGAL_CHAN_FREQ",
5039 "VCC_NOT_STBL",
5040 "FH49_ERROR",
5041 "NMI_INTERRUPT_HOST",
5042 "NMI_INTERRUPT_ACTION_PT",
5043 "NMI_INTERRUPT_UNKNOWN",
5044 "UCODE_VERSION_MISMATCH",
5045 "HW_ERROR_ABS_LOCK",
5046 "HW_ERROR_CAL_LOCK_FAIL",
5047 "NMI_INTERRUPT_INST_ACTION_PT",
5048 "NMI_INTERRUPT_DATA_ACTION_PT",
5049 "NMI_TRM_HW_ER",
5050 "NMI_INTERRUPT_TRM",
5051 "NMI_INTERRUPT_BREAK_POINT",
5052 "DEBUG_0",
5053 "DEBUG_1",
5054 "DEBUG_2",
5055 "DEBUG_3",
5056};
5057
5058static struct {
5059 char *name;
5060 u8 num;
5061} advanced_lookup[] = {
5062 {
5063 "NMI_INTERRUPT_WDG", 0x34}, {
5064 "SYSASSERT", 0x35}, {
5065 "UCODE_VERSION_MISMATCH", 0x37}, {
5066 "BAD_COMMAND", 0x38}, {
5067 "NMI_INTERRUPT_DATA_ACTION_PT", 0x3C}, {
5068 "FATAL_ERROR", 0x3D}, {
5069 "NMI_TRM_HW_ERR", 0x46}, {
5070 "NMI_INTERRUPT_TRM", 0x4C}, {
5071 "NMI_INTERRUPT_BREAK_POINT", 0x54}, {
5072 "NMI_INTERRUPT_WDG_RXF_FULL", 0x5C}, {
5073 "NMI_INTERRUPT_WDG_NO_RBD_RXF_FULL", 0x64}, {
5074 "NMI_INTERRUPT_HOST", 0x66}, {
5075 "NMI_INTERRUPT_ACTION_PT", 0x7C}, {
5076 "NMI_INTERRUPT_UNKNOWN", 0x84}, {
5077 "NMI_INTERRUPT_INST_ACTION_PT", 0x86}, {
5078"ADVANCED_SYSASSERT", 0},};
5079
5080static const char *
5081il4965_desc_lookup(u32 num)
5082{
5083 int i;
5084 int max = ARRAY_SIZE(desc_lookup_text);
5085
5086 if (num < max)
5087 return desc_lookup_text[num];
5088
5089 max = ARRAY_SIZE(advanced_lookup) - 1;
5090 for (i = 0; i < max; i++) {
5091 if (advanced_lookup[i].num == num)
5092 break;
5093 }
5094 return advanced_lookup[i].name;
5095}
5096
5097#define ERROR_START_OFFSET (1 * sizeof(u32))
5098#define ERROR_ELEM_SIZE (7 * sizeof(u32))
5099
5100void
5101il4965_dump_nic_error_log(struct il_priv *il)
5102{
5103 u32 data2, line;
5104 u32 desc, time, count, base, data1;
5105 u32 blink1, blink2, ilink1, ilink2;
5106 u32 pc, hcmd;
5107
5108 if (il->ucode_type == UCODE_INIT)
5109 base = le32_to_cpu(il->card_alive_init.error_event_table_ptr);
5110 else
5111 base = le32_to_cpu(il->card_alive.error_event_table_ptr);
5112
5113 if (!il->ops->is_valid_rtc_data_addr(base)) {
5114 IL_ERR("Not valid error log pointer 0x%08X for %s uCode\n",
5115 base, (il->ucode_type == UCODE_INIT) ? "Init" : "RT");
5116 return;
5117 }
5118
5119 count = il_read_targ_mem(il, base);
5120
5121 if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
5122 IL_ERR("Start IWL Error Log Dump:\n");
5123 IL_ERR("Status: 0x%08lX, count: %d\n", il->status, count);
5124 }
5125
5126 desc = il_read_targ_mem(il, base + 1 * sizeof(u32));
5127 il->isr_stats.err_code = desc;
5128 pc = il_read_targ_mem(il, base + 2 * sizeof(u32));
5129 blink1 = il_read_targ_mem(il, base + 3 * sizeof(u32));
5130 blink2 = il_read_targ_mem(il, base + 4 * sizeof(u32));
5131 ilink1 = il_read_targ_mem(il, base + 5 * sizeof(u32));
5132 ilink2 = il_read_targ_mem(il, base + 6 * sizeof(u32));
5133 data1 = il_read_targ_mem(il, base + 7 * sizeof(u32));
5134 data2 = il_read_targ_mem(il, base + 8 * sizeof(u32));
5135 line = il_read_targ_mem(il, base + 9 * sizeof(u32));
5136 time = il_read_targ_mem(il, base + 11 * sizeof(u32));
5137 hcmd = il_read_targ_mem(il, base + 22 * sizeof(u32));
5138
5139 IL_ERR("Desc Time "
5140 "data1 data2 line\n");
5141 IL_ERR("%-28s (0x%04X) %010u 0x%08X 0x%08X %u\n",
5142 il4965_desc_lookup(desc), desc, time, data1, data2, line);
5143 IL_ERR("pc blink1 blink2 ilink1 ilink2 hcmd\n");
5144 IL_ERR("0x%05X 0x%05X 0x%05X 0x%05X 0x%05X 0x%05X\n", pc, blink1,
5145 blink2, ilink1, ilink2, hcmd);
5146}
5147
5148static void
5149il4965_rf_kill_ct_config(struct il_priv *il)
5150{
5151 struct il_ct_kill_config cmd;
5152 unsigned long flags;
5153 int ret = 0;
5154
5155 spin_lock_irqsave(&il->lock, flags);
5156 _il_wr(il, CSR_UCODE_DRV_GP1_CLR,
5157 CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
5158 spin_unlock_irqrestore(&il->lock, flags);
5159
5160 cmd.critical_temperature_R =
5161 cpu_to_le32(il->hw_params.ct_kill_threshold);
5162
5163 ret = il_send_cmd_pdu(il, C_CT_KILL_CONFIG, sizeof(cmd), &cmd);
5164 if (ret)
5165 IL_ERR("C_CT_KILL_CONFIG failed\n");
5166 else
5167 D_INFO("C_CT_KILL_CONFIG " "succeeded, "
5168 "critical temperature is %d\n",
5169 il->hw_params.ct_kill_threshold);
5170}
5171
5172static const s8 default_queue_to_tx_fifo[] = {
5173 IL_TX_FIFO_VO,
5174 IL_TX_FIFO_VI,
5175 IL_TX_FIFO_BE,
5176 IL_TX_FIFO_BK,
5177 IL49_CMD_FIFO_NUM,
5178 IL_TX_FIFO_UNUSED,
5179 IL_TX_FIFO_UNUSED,
5180};
5181
5182#define IL_MASK(lo, hi) ((1 << (hi)) | ((1 << (hi)) - (1 << (lo))))
5183
5184static int
5185il4965_alive_notify(struct il_priv *il)
5186{
5187 u32 a;
5188 unsigned long flags;
5189 int i, chan;
5190 u32 reg_val;
5191
5192 spin_lock_irqsave(&il->lock, flags);
5193
5194 /* Clear 4965's internal Tx Scheduler data base */
5195 il->scd_base_addr = il_rd_prph(il, IL49_SCD_SRAM_BASE_ADDR);
5196 a = il->scd_base_addr + IL49_SCD_CONTEXT_DATA_OFFSET;
5197 for (; a < il->scd_base_addr + IL49_SCD_TX_STTS_BITMAP_OFFSET; a += 4)
5198 il_write_targ_mem(il, a, 0);
5199 for (; a < il->scd_base_addr + IL49_SCD_TRANSLATE_TBL_OFFSET; a += 4)
5200 il_write_targ_mem(il, a, 0);
5201 for (;
5202 a <
5203 il->scd_base_addr +
5204 IL49_SCD_TRANSLATE_TBL_OFFSET_QUEUE(il->hw_params.max_txq_num);
5205 a += 4)
5206 il_write_targ_mem(il, a, 0);
5207
5208 /* Tel 4965 where to find Tx byte count tables */
5209 il_wr_prph(il, IL49_SCD_DRAM_BASE_ADDR, il->scd_bc_tbls.dma >> 10);
5210
5211 /* Enable DMA channel */
5212 for (chan = 0; chan < FH49_TCSR_CHNL_NUM; chan++)
5213 il_wr(il, FH49_TCSR_CHNL_TX_CONFIG_REG(chan),
5214 FH49_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE |
5215 FH49_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE);
5216
5217 /* Update FH chicken bits */
5218 reg_val = il_rd(il, FH49_TX_CHICKEN_BITS_REG);
5219 il_wr(il, FH49_TX_CHICKEN_BITS_REG,
5220 reg_val | FH49_TX_CHICKEN_BITS_SCD_AUTO_RETRY_EN);
5221
5222 /* Disable chain mode for all queues */
5223 il_wr_prph(il, IL49_SCD_QUEUECHAIN_SEL, 0);
5224
5225 /* Initialize each Tx queue (including the command queue) */
5226 for (i = 0; i < il->hw_params.max_txq_num; i++) {
5227
5228 /* TFD circular buffer read/write idxes */
5229 il_wr_prph(il, IL49_SCD_QUEUE_RDPTR(i), 0);
5230 il_wr(il, HBUS_TARG_WRPTR, 0 | (i << 8));
5231
5232 /* Max Tx Window size for Scheduler-ACK mode */
5233 il_write_targ_mem(il,
5234 il->scd_base_addr +
5235 IL49_SCD_CONTEXT_QUEUE_OFFSET(i),
5236 (SCD_WIN_SIZE <<
5237 IL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
5238 IL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
5239
5240 /* Frame limit */
5241 il_write_targ_mem(il,
5242 il->scd_base_addr +
5243 IL49_SCD_CONTEXT_QUEUE_OFFSET(i) +
5244 sizeof(u32),
5245 (SCD_FRAME_LIMIT <<
5246 IL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) &
5247 IL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
5248
5249 }
5250 il_wr_prph(il, IL49_SCD_INTERRUPT_MASK,
5251 (1 << il->hw_params.max_txq_num) - 1);
5252
5253 /* Activate all Tx DMA/FIFO channels */
5254 il4965_txq_set_sched(il, IL_MASK(0, 6));
5255
5256 il4965_set_wr_ptrs(il, IL_DEFAULT_CMD_QUEUE_NUM, 0);
5257
5258 /* make sure all queue are not stopped */
5259 memset(&il->queue_stopped[0], 0, sizeof(il->queue_stopped));
5260 for (i = 0; i < 4; i++)
5261 atomic_set(&il->queue_stop_count[i], 0);
5262
5263 /* reset to 0 to enable all the queue first */
5264 il->txq_ctx_active_msk = 0;
5265 /* Map each Tx/cmd queue to its corresponding fifo */
5266 BUILD_BUG_ON(ARRAY_SIZE(default_queue_to_tx_fifo) != 7);
5267
5268 for (i = 0; i < ARRAY_SIZE(default_queue_to_tx_fifo); i++) {
5269 int ac = default_queue_to_tx_fifo[i];
5270
5271 il_txq_ctx_activate(il, i);
5272
5273 if (ac == IL_TX_FIFO_UNUSED)
5274 continue;
5275
5276 il4965_tx_queue_set_status(il, &il->txq[i], ac, 0);
5277 }
5278
5279 spin_unlock_irqrestore(&il->lock, flags);
5280
5281 return 0;
5282}
5283
5284/**
5285 * il4965_alive_start - called after N_ALIVE notification received
5286 * from protocol/runtime uCode (initialization uCode's
5287 * Alive gets handled by il_init_alive_start()).
5288 */
5289static void
5290il4965_alive_start(struct il_priv *il)
5291{
5292 int ret = 0;
5293
5294 D_INFO("Runtime Alive received.\n");
5295
5296 if (il->card_alive.is_valid != UCODE_VALID_OK) {
5297 /* We had an error bringing up the hardware, so take it
5298 * all the way back down so we can try again */
5299 D_INFO("Alive failed.\n");
5300 goto restart;
5301 }
5302
5303 /* Initialize uCode has loaded Runtime uCode ... verify inst image.
5304 * This is a paranoid check, because we would not have gotten the
5305 * "runtime" alive if code weren't properly loaded. */
5306 if (il4965_verify_ucode(il)) {
5307 /* Runtime instruction load was bad;
5308 * take it all the way back down so we can try again */
5309 D_INFO("Bad runtime uCode load.\n");
5310 goto restart;
5311 }
5312
5313 ret = il4965_alive_notify(il);
5314 if (ret) {
5315 IL_WARN("Could not complete ALIVE transition [ntf]: %d\n", ret);
5316 goto restart;
5317 }
5318
5319 /* After the ALIVE response, we can send host commands to the uCode */
5320 set_bit(S_ALIVE, &il->status);
5321
5322 /* Enable watchdog to monitor the driver tx queues */
5323 il_setup_watchdog(il);
5324
5325 if (il_is_rfkill(il))
5326 return;
5327
5328 ieee80211_wake_queues(il->hw);
5329
5330 il->active_rate = RATES_MASK;
5331
5332 il_power_update_mode(il, true);
5333 D_INFO("Updated power mode\n");
5334
5335 if (il_is_associated(il)) {
5336 struct il_rxon_cmd *active_rxon =
5337 (struct il_rxon_cmd *)&il->active;
5338 /* apply any changes in staging */
5339 il->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
5340 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5341 } else {
5342 /* Initialize our rx_config data */
5343 il_connection_init_rx_config(il);
5344
5345 if (il->ops->set_rxon_chain)
5346 il->ops->set_rxon_chain(il);
5347 }
5348
5349 /* Configure bluetooth coexistence if enabled */
5350 il_send_bt_config(il);
5351
5352 il4965_reset_run_time_calib(il);
5353
5354 set_bit(S_READY, &il->status);
5355
5356 /* Configure the adapter for unassociated operation */
5357 il_commit_rxon(il);
5358
5359 /* At this point, the NIC is initialized and operational */
5360 il4965_rf_kill_ct_config(il);
5361
5362 D_INFO("ALIVE processing complete.\n");
5363 wake_up(&il->wait_command_queue);
5364
5365 return;
5366
5367restart:
5368 queue_work(il->workqueue, &il->restart);
5369}
5370
5371static void il4965_cancel_deferred_work(struct il_priv *il);
5372
5373static void
5374__il4965_down(struct il_priv *il)
5375{
5376 unsigned long flags;
5377 int exit_pending;
5378
5379 D_INFO(DRV_NAME " is going down\n");
5380
5381 il_scan_cancel_timeout(il, 200);
5382
5383 exit_pending = test_and_set_bit(S_EXIT_PENDING, &il->status);
5384
5385 /* Stop TX queues watchdog. We need to have S_EXIT_PENDING bit set
5386 * to prevent rearm timer */
5387 del_timer_sync(&il->watchdog);
5388
5389 il_clear_ucode_stations(il);
5390
5391 /* FIXME: race conditions ? */
5392 spin_lock_irq(&il->sta_lock);
5393 /*
5394 * Remove all key information that is not stored as part
5395 * of station information since mac80211 may not have had
5396 * a chance to remove all the keys. When device is
5397 * reconfigured by mac80211 after an error all keys will
5398 * be reconfigured.
5399 */
5400 memset(il->_4965.wep_keys, 0, sizeof(il->_4965.wep_keys));
5401 il->_4965.key_mapping_keys = 0;
5402 spin_unlock_irq(&il->sta_lock);
5403
5404 il_dealloc_bcast_stations(il);
5405 il_clear_driver_stations(il);
5406
5407 /* Unblock any waiting calls */
5408 wake_up_all(&il->wait_command_queue);
5409
5410 /* Wipe out the EXIT_PENDING status bit if we are not actually
5411 * exiting the module */
5412 if (!exit_pending)
5413 clear_bit(S_EXIT_PENDING, &il->status);
5414
5415 /* stop and reset the on-board processor */
5416 _il_wr(il, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
5417
5418 /* tell the device to stop sending interrupts */
5419 spin_lock_irqsave(&il->lock, flags);
5420 il_disable_interrupts(il);
5421 spin_unlock_irqrestore(&il->lock, flags);
5422 il4965_synchronize_irq(il);
5423
5424 if (il->mac80211_registered)
5425 ieee80211_stop_queues(il->hw);
5426
5427 /* If we have not previously called il_init() then
5428 * clear all bits but the RF Kill bit and return */
5429 if (!il_is_init(il)) {
5430 il->status =
5431 test_bit(S_RFKILL, &il->status) << S_RFKILL |
5432 test_bit(S_GEO_CONFIGURED, &il->status) << S_GEO_CONFIGURED |
5433 test_bit(S_EXIT_PENDING, &il->status) << S_EXIT_PENDING;
5434 goto exit;
5435 }
5436
5437 /* ...otherwise clear out all the status bits but the RF Kill
5438 * bit and continue taking the NIC down. */
5439 il->status &=
5440 test_bit(S_RFKILL, &il->status) << S_RFKILL |
5441 test_bit(S_GEO_CONFIGURED, &il->status) << S_GEO_CONFIGURED |
5442 test_bit(S_FW_ERROR, &il->status) << S_FW_ERROR |
5443 test_bit(S_EXIT_PENDING, &il->status) << S_EXIT_PENDING;
5444
5445 /*
5446 * We disabled and synchronized interrupt, and priv->mutex is taken, so
5447 * here is the only thread which will program device registers, but
5448 * still have lockdep assertions, so we are taking reg_lock.
5449 */
5450 spin_lock_irq(&il->reg_lock);
5451 /* FIXME: il_grab_nic_access if rfkill is off ? */
5452
5453 il4965_txq_ctx_stop(il);
5454 il4965_rxq_stop(il);
5455 /* Power-down device's busmaster DMA clocks */
5456 _il_wr_prph(il, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT);
5457 udelay(5);
5458 /* Make sure (redundant) we've released our request to stay awake */
5459 _il_clear_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
5460 /* Stop the device, and put it in low power state */
5461 _il_apm_stop(il);
5462
5463 spin_unlock_irq(&il->reg_lock);
5464
5465 il4965_txq_ctx_unmap(il);
5466exit:
5467 memset(&il->card_alive, 0, sizeof(struct il_alive_resp));
5468
5469 dev_kfree_skb(il->beacon_skb);
5470 il->beacon_skb = NULL;
5471
5472 /* clear out any free frames */
5473 il4965_clear_free_frames(il);
5474}
5475
5476static void
5477il4965_down(struct il_priv *il)
5478{
5479 mutex_lock(&il->mutex);
5480 __il4965_down(il);
5481 mutex_unlock(&il->mutex);
5482
5483 il4965_cancel_deferred_work(il);
5484}
5485
5486
5487static void
5488il4965_set_hw_ready(struct il_priv *il)
5489{
5490 int ret;
5491
5492 il_set_bit(il, CSR_HW_IF_CONFIG_REG,
5493 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY);
5494
5495 /* See if we got it */
5496 ret = _il_poll_bit(il, CSR_HW_IF_CONFIG_REG,
5497 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
5498 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
5499 100);
5500 if (ret >= 0)
5501 il->hw_ready = true;
5502
5503 D_INFO("hardware %s ready\n", (il->hw_ready) ? "" : "not");
5504}
5505
5506static void
5507il4965_prepare_card_hw(struct il_priv *il)
5508{
5509 int ret;
5510
5511 il->hw_ready = false;
5512
5513 il4965_set_hw_ready(il);
5514 if (il->hw_ready)
5515 return;
5516
5517 /* If HW is not ready, prepare the conditions to check again */
5518 il_set_bit(il, CSR_HW_IF_CONFIG_REG, CSR_HW_IF_CONFIG_REG_PREPARE);
5519
5520 ret =
5521 _il_poll_bit(il, CSR_HW_IF_CONFIG_REG,
5522 ~CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE,
5523 CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE, 150000);
5524
5525 /* HW should be ready by now, check again. */
5526 if (ret != -ETIMEDOUT)
5527 il4965_set_hw_ready(il);
5528}
5529
5530#define MAX_HW_RESTARTS 5
5531
5532static int
5533__il4965_up(struct il_priv *il)
5534{
5535 int i;
5536 int ret;
5537
5538 if (test_bit(S_EXIT_PENDING, &il->status)) {
5539 IL_WARN("Exit pending; will not bring the NIC up\n");
5540 return -EIO;
5541 }
5542
5543 if (!il->ucode_data_backup.v_addr || !il->ucode_data.v_addr) {
5544 IL_ERR("ucode not available for device bringup\n");
5545 return -EIO;
5546 }
5547
5548 ret = il4965_alloc_bcast_station(il);
5549 if (ret) {
5550 il_dealloc_bcast_stations(il);
5551 return ret;
5552 }
5553
5554 il4965_prepare_card_hw(il);
5555 if (!il->hw_ready) {
5556 IL_ERR("HW not ready\n");
5557 return -EIO;
5558 }
5559
5560 /* If platform's RF_KILL switch is NOT set to KILL */
5561 if (_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
5562 clear_bit(S_RFKILL, &il->status);
5563 else {
5564 set_bit(S_RFKILL, &il->status);
5565 wiphy_rfkill_set_hw_state(il->hw->wiphy, true);
5566
5567 il_enable_rfkill_int(il);
5568 IL_WARN("Radio disabled by HW RF Kill switch\n");
5569 return 0;
5570 }
5571
5572 _il_wr(il, CSR_INT, 0xFFFFFFFF);
5573
5574 /* must be initialised before il_hw_nic_init */
5575 il->cmd_queue = IL_DEFAULT_CMD_QUEUE_NUM;
5576
5577 ret = il4965_hw_nic_init(il);
5578 if (ret) {
5579 IL_ERR("Unable to init nic\n");
5580 return ret;
5581 }
5582
5583 /* make sure rfkill handshake bits are cleared */
5584 _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5585 _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
5586
5587 /* clear (again), then enable host interrupts */
5588 _il_wr(il, CSR_INT, 0xFFFFFFFF);
5589 il_enable_interrupts(il);
5590
5591 /* really make sure rfkill handshake bits are cleared */
5592 _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5593 _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5594
5595 /* Copy original ucode data image from disk into backup cache.
5596 * This will be used to initialize the on-board processor's
5597 * data SRAM for a clean start when the runtime program first loads. */
5598 memcpy(il->ucode_data_backup.v_addr, il->ucode_data.v_addr,
5599 il->ucode_data.len);
5600
5601 for (i = 0; i < MAX_HW_RESTARTS; i++) {
5602
5603 /* load bootstrap state machine,
5604 * load bootstrap program into processor's memory,
5605 * prepare to load the "initialize" uCode */
5606 ret = il->ops->load_ucode(il);
5607
5608 if (ret) {
5609 IL_ERR("Unable to set up bootstrap uCode: %d\n", ret);
5610 continue;
5611 }
5612
5613 /* start card; "initialize" will load runtime ucode */
5614 il4965_nic_start(il);
5615
5616 D_INFO(DRV_NAME " is coming up\n");
5617
5618 return 0;
5619 }
5620
5621 set_bit(S_EXIT_PENDING, &il->status);
5622 __il4965_down(il);
5623 clear_bit(S_EXIT_PENDING, &il->status);
5624
5625 /* tried to restart and config the device for as long as our
5626 * patience could withstand */
5627 IL_ERR("Unable to initialize device after %d attempts.\n", i);
5628 return -EIO;
5629}
5630
5631/*****************************************************************************
5632 *
5633 * Workqueue callbacks
5634 *
5635 *****************************************************************************/
5636
5637static void
5638il4965_bg_init_alive_start(struct work_struct *data)
5639{
5640 struct il_priv *il =
5641 container_of(data, struct il_priv, init_alive_start.work);
5642
5643 mutex_lock(&il->mutex);
5644 if (test_bit(S_EXIT_PENDING, &il->status))
5645 goto out;
5646
5647 il->ops->init_alive_start(il);
5648out:
5649 mutex_unlock(&il->mutex);
5650}
5651
5652static void
5653il4965_bg_alive_start(struct work_struct *data)
5654{
5655 struct il_priv *il =
5656 container_of(data, struct il_priv, alive_start.work);
5657
5658 mutex_lock(&il->mutex);
5659 if (test_bit(S_EXIT_PENDING, &il->status))
5660 goto out;
5661
5662 il4965_alive_start(il);
5663out:
5664 mutex_unlock(&il->mutex);
5665}
5666
5667static void
5668il4965_bg_run_time_calib_work(struct work_struct *work)
5669{
5670 struct il_priv *il = container_of(work, struct il_priv,
5671 run_time_calib_work);
5672
5673 mutex_lock(&il->mutex);
5674
5675 if (test_bit(S_EXIT_PENDING, &il->status) ||
5676 test_bit(S_SCANNING, &il->status)) {
5677 mutex_unlock(&il->mutex);
5678 return;
5679 }
5680
5681 if (il->start_calib) {
5682 il4965_chain_noise_calibration(il, (void *)&il->_4965.stats);
5683 il4965_sensitivity_calibration(il, (void *)&il->_4965.stats);
5684 }
5685
5686 mutex_unlock(&il->mutex);
5687}
5688
5689static void
5690il4965_bg_restart(struct work_struct *data)
5691{
5692 struct il_priv *il = container_of(data, struct il_priv, restart);
5693
5694 if (test_bit(S_EXIT_PENDING, &il->status))
5695 return;
5696
5697 if (test_and_clear_bit(S_FW_ERROR, &il->status)) {
5698 mutex_lock(&il->mutex);
5699 il->is_open = 0;
5700
5701 __il4965_down(il);
5702
5703 mutex_unlock(&il->mutex);
5704 il4965_cancel_deferred_work(il);
5705 ieee80211_restart_hw(il->hw);
5706 } else {
5707 il4965_down(il);
5708
5709 mutex_lock(&il->mutex);
5710 if (test_bit(S_EXIT_PENDING, &il->status)) {
5711 mutex_unlock(&il->mutex);
5712 return;
5713 }
5714
5715 __il4965_up(il);
5716 mutex_unlock(&il->mutex);
5717 }
5718}
5719
5720static void
5721il4965_bg_rx_replenish(struct work_struct *data)
5722{
5723 struct il_priv *il = container_of(data, struct il_priv, rx_replenish);
5724
5725 if (test_bit(S_EXIT_PENDING, &il->status))
5726 return;
5727
5728 mutex_lock(&il->mutex);
5729 il4965_rx_replenish(il);
5730 mutex_unlock(&il->mutex);
5731}
5732
5733/*****************************************************************************
5734 *
5735 * mac80211 entry point functions
5736 *
5737 *****************************************************************************/
5738
5739#define UCODE_READY_TIMEOUT (4 * HZ)
5740
5741/*
5742 * Not a mac80211 entry point function, but it fits in with all the
5743 * other mac80211 functions grouped here.
5744 */
5745static int
5746il4965_mac_setup_register(struct il_priv *il, u32 max_probe_length)
5747{
5748 int ret;
5749 struct ieee80211_hw *hw = il->hw;
5750
5751 hw->rate_control_algorithm = "iwl-4965-rs";
5752
5753 /* Tell mac80211 our characteristics */
5754 ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS);
5755 ieee80211_hw_set(hw, SUPPORTS_PS);
5756 ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS);
5757 ieee80211_hw_set(hw, SPECTRUM_MGMT);
5758 ieee80211_hw_set(hw, NEED_DTIM_BEFORE_ASSOC);
5759 ieee80211_hw_set(hw, SIGNAL_DBM);
5760 ieee80211_hw_set(hw, AMPDU_AGGREGATION);
5761 if (il->cfg->sku & IL_SKU_N)
5762 hw->wiphy->features |= NL80211_FEATURE_DYNAMIC_SMPS |
5763 NL80211_FEATURE_STATIC_SMPS;
5764
5765 hw->sta_data_size = sizeof(struct il_station_priv);
5766 hw->vif_data_size = sizeof(struct il_vif_priv);
5767
5768 hw->wiphy->interface_modes =
5769 BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_ADHOC);
5770
5771 hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
5772 hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
5773 REGULATORY_DISABLE_BEACON_HINTS;
5774
5775 /*
5776 * For now, disable PS by default because it affects
5777 * RX performance significantly.
5778 */
5779 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
5780
5781 hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
5782 /* we create the 802.11 header and a zero-length SSID element */
5783 hw->wiphy->max_scan_ie_len = max_probe_length - 24 - 2;
5784
5785 /* Default value; 4 EDCA QOS priorities */
5786 hw->queues = 4;
5787
5788 hw->max_listen_interval = IL_CONN_MAX_LISTEN_INTERVAL;
5789
5790 if (il->bands[IEEE80211_BAND_2GHZ].n_channels)
5791 il->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
5792 &il->bands[IEEE80211_BAND_2GHZ];
5793 if (il->bands[IEEE80211_BAND_5GHZ].n_channels)
5794 il->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
5795 &il->bands[IEEE80211_BAND_5GHZ];
5796
5797 il_leds_init(il);
5798
5799 ret = ieee80211_register_hw(il->hw);
5800 if (ret) {
5801 IL_ERR("Failed to register hw (error %d)\n", ret);
5802 return ret;
5803 }
5804 il->mac80211_registered = 1;
5805
5806 return 0;
5807}
5808
5809int
5810il4965_mac_start(struct ieee80211_hw *hw)
5811{
5812 struct il_priv *il = hw->priv;
5813 int ret;
5814
5815 D_MAC80211("enter\n");
5816
5817 /* we should be verifying the device is ready to be opened */
5818 mutex_lock(&il->mutex);
5819 ret = __il4965_up(il);
5820 mutex_unlock(&il->mutex);
5821
5822 if (ret)
5823 return ret;
5824
5825 if (il_is_rfkill(il))
5826 goto out;
5827
5828 D_INFO("Start UP work done.\n");
5829
5830 /* Wait for START_ALIVE from Run Time ucode. Otherwise callbacks from
5831 * mac80211 will not be run successfully. */
5832 ret = wait_event_timeout(il->wait_command_queue,
5833 test_bit(S_READY, &il->status),
5834 UCODE_READY_TIMEOUT);
5835 if (!ret) {
5836 if (!test_bit(S_READY, &il->status)) {
5837 IL_ERR("START_ALIVE timeout after %dms.\n",
5838 jiffies_to_msecs(UCODE_READY_TIMEOUT));
5839 return -ETIMEDOUT;
5840 }
5841 }
5842
5843 il4965_led_enable(il);
5844
5845out:
5846 il->is_open = 1;
5847 D_MAC80211("leave\n");
5848 return 0;
5849}
5850
5851void
5852il4965_mac_stop(struct ieee80211_hw *hw)
5853{
5854 struct il_priv *il = hw->priv;
5855
5856 D_MAC80211("enter\n");
5857
5858 if (!il->is_open)
5859 return;
5860
5861 il->is_open = 0;
5862
5863 il4965_down(il);
5864
5865 flush_workqueue(il->workqueue);
5866
5867 /* User space software may expect getting rfkill changes
5868 * even if interface is down */
5869 _il_wr(il, CSR_INT, 0xFFFFFFFF);
5870 il_enable_rfkill_int(il);
5871
5872 D_MAC80211("leave\n");
5873}
5874
5875void
5876il4965_mac_tx(struct ieee80211_hw *hw,
5877 struct ieee80211_tx_control *control,
5878 struct sk_buff *skb)
5879{
5880 struct il_priv *il = hw->priv;
5881
5882 D_MACDUMP("enter\n");
5883
5884 D_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
5885 ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
5886
5887 if (il4965_tx_skb(il, control->sta, skb))
5888 dev_kfree_skb_any(skb);
5889
5890 D_MACDUMP("leave\n");
5891}
5892
5893void
5894il4965_mac_update_tkip_key(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5895 struct ieee80211_key_conf *keyconf,
5896 struct ieee80211_sta *sta, u32 iv32, u16 * phase1key)
5897{
5898 struct il_priv *il = hw->priv;
5899
5900 D_MAC80211("enter\n");
5901
5902 il4965_update_tkip_key(il, keyconf, sta, iv32, phase1key);
5903
5904 D_MAC80211("leave\n");
5905}
5906
5907int
5908il4965_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
5909 struct ieee80211_vif *vif, struct ieee80211_sta *sta,
5910 struct ieee80211_key_conf *key)
5911{
5912 struct il_priv *il = hw->priv;
5913 int ret;
5914 u8 sta_id;
5915 bool is_default_wep_key = false;
5916
5917 D_MAC80211("enter\n");
5918
5919 if (il->cfg->mod_params->sw_crypto) {
5920 D_MAC80211("leave - hwcrypto disabled\n");
5921 return -EOPNOTSUPP;
5922 }
5923
5924 /*
5925 * To support IBSS RSN, don't program group keys in IBSS, the
5926 * hardware will then not attempt to decrypt the frames.
5927 */
5928 if (vif->type == NL80211_IFTYPE_ADHOC &&
5929 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
5930 D_MAC80211("leave - ad-hoc group key\n");
5931 return -EOPNOTSUPP;
5932 }
5933
5934 sta_id = il_sta_id_or_broadcast(il, sta);
5935 if (sta_id == IL_INVALID_STATION)
5936 return -EINVAL;
5937
5938 mutex_lock(&il->mutex);
5939 il_scan_cancel_timeout(il, 100);
5940
5941 /*
5942 * If we are getting WEP group key and we didn't receive any key mapping
5943 * so far, we are in legacy wep mode (group key only), otherwise we are
5944 * in 1X mode.
5945 * In legacy wep mode, we use another host command to the uCode.
5946 */
5947 if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
5948 key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) {
5949 if (cmd == SET_KEY)
5950 is_default_wep_key = !il->_4965.key_mapping_keys;
5951 else
5952 is_default_wep_key =
5953 (key->hw_key_idx == HW_KEY_DEFAULT);
5954 }
5955
5956 switch (cmd) {
5957 case SET_KEY:
5958 if (is_default_wep_key)
5959 ret = il4965_set_default_wep_key(il, key);
5960 else
5961 ret = il4965_set_dynamic_key(il, key, sta_id);
5962
5963 D_MAC80211("enable hwcrypto key\n");
5964 break;
5965 case DISABLE_KEY:
5966 if (is_default_wep_key)
5967 ret = il4965_remove_default_wep_key(il, key);
5968 else
5969 ret = il4965_remove_dynamic_key(il, key, sta_id);
5970
5971 D_MAC80211("disable hwcrypto key\n");
5972 break;
5973 default:
5974 ret = -EINVAL;
5975 }
5976
5977 mutex_unlock(&il->mutex);
5978 D_MAC80211("leave\n");
5979
5980 return ret;
5981}
5982
5983int
5984il4965_mac_ampdu_action(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5985 struct ieee80211_ampdu_params *params)
5986{
5987 struct il_priv *il = hw->priv;
5988 int ret = -EINVAL;
5989 struct ieee80211_sta *sta = params->sta;
5990 enum ieee80211_ampdu_mlme_action action = params->action;
5991 u16 tid = params->tid;
5992 u16 *ssn = ¶ms->ssn;
5993
5994 D_HT("A-MPDU action on addr %pM tid %d\n", sta->addr, tid);
5995
5996 if (!(il->cfg->sku & IL_SKU_N))
5997 return -EACCES;
5998
5999 mutex_lock(&il->mutex);
6000
6001 switch (action) {
6002 case IEEE80211_AMPDU_RX_START:
6003 D_HT("start Rx\n");
6004 ret = il4965_sta_rx_agg_start(il, sta, tid, *ssn);
6005 break;
6006 case IEEE80211_AMPDU_RX_STOP:
6007 D_HT("stop Rx\n");
6008 ret = il4965_sta_rx_agg_stop(il, sta, tid);
6009 if (test_bit(S_EXIT_PENDING, &il->status))
6010 ret = 0;
6011 break;
6012 case IEEE80211_AMPDU_TX_START:
6013 D_HT("start Tx\n");
6014 ret = il4965_tx_agg_start(il, vif, sta, tid, ssn);
6015 break;
6016 case IEEE80211_AMPDU_TX_STOP_CONT:
6017 case IEEE80211_AMPDU_TX_STOP_FLUSH:
6018 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
6019 D_HT("stop Tx\n");
6020 ret = il4965_tx_agg_stop(il, vif, sta, tid);
6021 if (test_bit(S_EXIT_PENDING, &il->status))
6022 ret = 0;
6023 break;
6024 case IEEE80211_AMPDU_TX_OPERATIONAL:
6025 ret = 0;
6026 break;
6027 }
6028 mutex_unlock(&il->mutex);
6029
6030 return ret;
6031}
6032
6033int
6034il4965_mac_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
6035 struct ieee80211_sta *sta)
6036{
6037 struct il_priv *il = hw->priv;
6038 struct il_station_priv *sta_priv = (void *)sta->drv_priv;
6039 bool is_ap = vif->type == NL80211_IFTYPE_STATION;
6040 int ret;
6041 u8 sta_id;
6042
6043 D_INFO("received request to add station %pM\n", sta->addr);
6044 mutex_lock(&il->mutex);
6045 D_INFO("proceeding to add station %pM\n", sta->addr);
6046 sta_priv->common.sta_id = IL_INVALID_STATION;
6047
6048 atomic_set(&sta_priv->pending_frames, 0);
6049
6050 ret =
6051 il_add_station_common(il, sta->addr, is_ap, sta, &sta_id);
6052 if (ret) {
6053 IL_ERR("Unable to add station %pM (%d)\n", sta->addr, ret);
6054 /* Should we return success if return code is EEXIST ? */
6055 mutex_unlock(&il->mutex);
6056 return ret;
6057 }
6058
6059 sta_priv->common.sta_id = sta_id;
6060
6061 /* Initialize rate scaling */
6062 D_INFO("Initializing rate scaling for station %pM\n", sta->addr);
6063 il4965_rs_rate_init(il, sta, sta_id);
6064 mutex_unlock(&il->mutex);
6065
6066 return 0;
6067}
6068
6069void
6070il4965_mac_channel_switch(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
6071 struct ieee80211_channel_switch *ch_switch)
6072{
6073 struct il_priv *il = hw->priv;
6074 const struct il_channel_info *ch_info;
6075 struct ieee80211_conf *conf = &hw->conf;
6076 struct ieee80211_channel *channel = ch_switch->chandef.chan;
6077 struct il_ht_config *ht_conf = &il->current_ht_config;
6078 u16 ch;
6079
6080 D_MAC80211("enter\n");
6081
6082 mutex_lock(&il->mutex);
6083
6084 if (il_is_rfkill(il))
6085 goto out;
6086
6087 if (test_bit(S_EXIT_PENDING, &il->status) ||
6088 test_bit(S_SCANNING, &il->status) ||
6089 test_bit(S_CHANNEL_SWITCH_PENDING, &il->status))
6090 goto out;
6091
6092 if (!il_is_associated(il))
6093 goto out;
6094
6095 if (!il->ops->set_channel_switch)
6096 goto out;
6097
6098 ch = channel->hw_value;
6099 if (le16_to_cpu(il->active.channel) == ch)
6100 goto out;
6101
6102 ch_info = il_get_channel_info(il, channel->band, ch);
6103 if (!il_is_channel_valid(ch_info)) {
6104 D_MAC80211("invalid channel\n");
6105 goto out;
6106 }
6107
6108 spin_lock_irq(&il->lock);
6109
6110 il->current_ht_config.smps = conf->smps_mode;
6111
6112 /* Configure HT40 channels */
6113 switch (cfg80211_get_chandef_type(&ch_switch->chandef)) {
6114 case NL80211_CHAN_NO_HT:
6115 case NL80211_CHAN_HT20:
6116 il->ht.is_40mhz = false;
6117 il->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
6118 break;
6119 case NL80211_CHAN_HT40MINUS:
6120 il->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
6121 il->ht.is_40mhz = true;
6122 break;
6123 case NL80211_CHAN_HT40PLUS:
6124 il->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
6125 il->ht.is_40mhz = true;
6126 break;
6127 }
6128
6129 if ((le16_to_cpu(il->staging.channel) != ch))
6130 il->staging.flags = 0;
6131
6132 il_set_rxon_channel(il, channel);
6133 il_set_rxon_ht(il, ht_conf);
6134 il_set_flags_for_band(il, channel->band, il->vif);
6135
6136 spin_unlock_irq(&il->lock);
6137
6138 il_set_rate(il);
6139 /*
6140 * at this point, staging_rxon has the
6141 * configuration for channel switch
6142 */
6143 set_bit(S_CHANNEL_SWITCH_PENDING, &il->status);
6144 il->switch_channel = cpu_to_le16(ch);
6145 if (il->ops->set_channel_switch(il, ch_switch)) {
6146 clear_bit(S_CHANNEL_SWITCH_PENDING, &il->status);
6147 il->switch_channel = 0;
6148 ieee80211_chswitch_done(il->vif, false);
6149 }
6150
6151out:
6152 mutex_unlock(&il->mutex);
6153 D_MAC80211("leave\n");
6154}
6155
6156void
6157il4965_configure_filter(struct ieee80211_hw *hw, unsigned int changed_flags,
6158 unsigned int *total_flags, u64 multicast)
6159{
6160 struct il_priv *il = hw->priv;
6161 __le32 filter_or = 0, filter_nand = 0;
6162
6163#define CHK(test, flag) do { \
6164 if (*total_flags & (test)) \
6165 filter_or |= (flag); \
6166 else \
6167 filter_nand |= (flag); \
6168 } while (0)
6169
6170 D_MAC80211("Enter: changed: 0x%x, total: 0x%x\n", changed_flags,
6171 *total_flags);
6172
6173 CHK(FIF_OTHER_BSS, RXON_FILTER_PROMISC_MSK);
6174 /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
6175 CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
6176 CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
6177
6178#undef CHK
6179
6180 mutex_lock(&il->mutex);
6181
6182 il->staging.filter_flags &= ~filter_nand;
6183 il->staging.filter_flags |= filter_or;
6184
6185 /*
6186 * Not committing directly because hardware can perform a scan,
6187 * but we'll eventually commit the filter flags change anyway.
6188 */
6189
6190 mutex_unlock(&il->mutex);
6191
6192 /*
6193 * Receiving all multicast frames is always enabled by the
6194 * default flags setup in il_connection_init_rx_config()
6195 * since we currently do not support programming multicast
6196 * filters into the device.
6197 */
6198 *total_flags &=
6199 FIF_OTHER_BSS | FIF_ALLMULTI |
6200 FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
6201}
6202
6203/*****************************************************************************
6204 *
6205 * driver setup and teardown
6206 *
6207 *****************************************************************************/
6208
6209static void
6210il4965_bg_txpower_work(struct work_struct *work)
6211{
6212 struct il_priv *il = container_of(work, struct il_priv,
6213 txpower_work);
6214
6215 mutex_lock(&il->mutex);
6216
6217 /* If a scan happened to start before we got here
6218 * then just return; the stats notification will
6219 * kick off another scheduled work to compensate for
6220 * any temperature delta we missed here. */
6221 if (test_bit(S_EXIT_PENDING, &il->status) ||
6222 test_bit(S_SCANNING, &il->status))
6223 goto out;
6224
6225 /* Regardless of if we are associated, we must reconfigure the
6226 * TX power since frames can be sent on non-radar channels while
6227 * not associated */
6228 il->ops->send_tx_power(il);
6229
6230 /* Update last_temperature to keep is_calib_needed from running
6231 * when it isn't needed... */
6232 il->last_temperature = il->temperature;
6233out:
6234 mutex_unlock(&il->mutex);
6235}
6236
6237static void
6238il4965_setup_deferred_work(struct il_priv *il)
6239{
6240 il->workqueue = create_singlethread_workqueue(DRV_NAME);
6241
6242 init_waitqueue_head(&il->wait_command_queue);
6243
6244 INIT_WORK(&il->restart, il4965_bg_restart);
6245 INIT_WORK(&il->rx_replenish, il4965_bg_rx_replenish);
6246 INIT_WORK(&il->run_time_calib_work, il4965_bg_run_time_calib_work);
6247 INIT_DELAYED_WORK(&il->init_alive_start, il4965_bg_init_alive_start);
6248 INIT_DELAYED_WORK(&il->alive_start, il4965_bg_alive_start);
6249
6250 il_setup_scan_deferred_work(il);
6251
6252 INIT_WORK(&il->txpower_work, il4965_bg_txpower_work);
6253
6254 setup_timer(&il->stats_periodic, il4965_bg_stats_periodic,
6255 (unsigned long)il);
6256
6257 setup_timer(&il->watchdog, il_bg_watchdog, (unsigned long)il);
6258
6259 tasklet_init(&il->irq_tasklet,
6260 (void (*)(unsigned long))il4965_irq_tasklet,
6261 (unsigned long)il);
6262}
6263
6264static void
6265il4965_cancel_deferred_work(struct il_priv *il)
6266{
6267 cancel_work_sync(&il->txpower_work);
6268 cancel_delayed_work_sync(&il->init_alive_start);
6269 cancel_delayed_work(&il->alive_start);
6270 cancel_work_sync(&il->run_time_calib_work);
6271
6272 il_cancel_scan_deferred_work(il);
6273
6274 del_timer_sync(&il->stats_periodic);
6275}
6276
6277static void
6278il4965_init_hw_rates(struct il_priv *il, struct ieee80211_rate *rates)
6279{
6280 int i;
6281
6282 for (i = 0; i < RATE_COUNT_LEGACY; i++) {
6283 rates[i].bitrate = il_rates[i].ieee * 5;
6284 rates[i].hw_value = i; /* Rate scaling will work on idxes */
6285 rates[i].hw_value_short = i;
6286 rates[i].flags = 0;
6287 if ((i >= IL_FIRST_CCK_RATE) && (i <= IL_LAST_CCK_RATE)) {
6288 /*
6289 * If CCK != 1M then set short preamble rate flag.
6290 */
6291 rates[i].flags |=
6292 (il_rates[i].plcp ==
6293 RATE_1M_PLCP) ? 0 : IEEE80211_RATE_SHORT_PREAMBLE;
6294 }
6295 }
6296}
6297
6298/*
6299 * Acquire il->lock before calling this function !
6300 */
6301void
6302il4965_set_wr_ptrs(struct il_priv *il, int txq_id, u32 idx)
6303{
6304 il_wr(il, HBUS_TARG_WRPTR, (idx & 0xff) | (txq_id << 8));
6305 il_wr_prph(il, IL49_SCD_QUEUE_RDPTR(txq_id), idx);
6306}
6307
6308void
6309il4965_tx_queue_set_status(struct il_priv *il, struct il_tx_queue *txq,
6310 int tx_fifo_id, int scd_retry)
6311{
6312 int txq_id = txq->q.id;
6313
6314 /* Find out whether to activate Tx queue */
6315 int active = test_bit(txq_id, &il->txq_ctx_active_msk) ? 1 : 0;
6316
6317 /* Set up and activate */
6318 il_wr_prph(il, IL49_SCD_QUEUE_STATUS_BITS(txq_id),
6319 (active << IL49_SCD_QUEUE_STTS_REG_POS_ACTIVE) |
6320 (tx_fifo_id << IL49_SCD_QUEUE_STTS_REG_POS_TXF) |
6321 (scd_retry << IL49_SCD_QUEUE_STTS_REG_POS_WSL) |
6322 (scd_retry << IL49_SCD_QUEUE_STTS_REG_POS_SCD_ACK) |
6323 IL49_SCD_QUEUE_STTS_REG_MSK);
6324
6325 txq->sched_retry = scd_retry;
6326
6327 D_INFO("%s %s Queue %d on AC %d\n", active ? "Activate" : "Deactivate",
6328 scd_retry ? "BA" : "AC", txq_id, tx_fifo_id);
6329}
6330
6331static const struct ieee80211_ops il4965_mac_ops = {
6332 .tx = il4965_mac_tx,
6333 .start = il4965_mac_start,
6334 .stop = il4965_mac_stop,
6335 .add_interface = il_mac_add_interface,
6336 .remove_interface = il_mac_remove_interface,
6337 .change_interface = il_mac_change_interface,
6338 .config = il_mac_config,
6339 .configure_filter = il4965_configure_filter,
6340 .set_key = il4965_mac_set_key,
6341 .update_tkip_key = il4965_mac_update_tkip_key,
6342 .conf_tx = il_mac_conf_tx,
6343 .reset_tsf = il_mac_reset_tsf,
6344 .bss_info_changed = il_mac_bss_info_changed,
6345 .ampdu_action = il4965_mac_ampdu_action,
6346 .hw_scan = il_mac_hw_scan,
6347 .sta_add = il4965_mac_sta_add,
6348 .sta_remove = il_mac_sta_remove,
6349 .channel_switch = il4965_mac_channel_switch,
6350 .tx_last_beacon = il_mac_tx_last_beacon,
6351 .flush = il_mac_flush,
6352};
6353
6354static int
6355il4965_init_drv(struct il_priv *il)
6356{
6357 int ret;
6358
6359 spin_lock_init(&il->sta_lock);
6360 spin_lock_init(&il->hcmd_lock);
6361
6362 INIT_LIST_HEAD(&il->free_frames);
6363
6364 mutex_init(&il->mutex);
6365
6366 il->ieee_channels = NULL;
6367 il->ieee_rates = NULL;
6368 il->band = IEEE80211_BAND_2GHZ;
6369
6370 il->iw_mode = NL80211_IFTYPE_STATION;
6371 il->current_ht_config.smps = IEEE80211_SMPS_STATIC;
6372 il->missed_beacon_threshold = IL_MISSED_BEACON_THRESHOLD_DEF;
6373
6374 /* initialize force reset */
6375 il->force_reset.reset_duration = IL_DELAY_NEXT_FORCE_FW_RELOAD;
6376
6377 /* Choose which receivers/antennas to use */
6378 if (il->ops->set_rxon_chain)
6379 il->ops->set_rxon_chain(il);
6380
6381 il_init_scan_params(il);
6382
6383 ret = il_init_channel_map(il);
6384 if (ret) {
6385 IL_ERR("initializing regulatory failed: %d\n", ret);
6386 goto err;
6387 }
6388
6389 ret = il_init_geos(il);
6390 if (ret) {
6391 IL_ERR("initializing geos failed: %d\n", ret);
6392 goto err_free_channel_map;
6393 }
6394 il4965_init_hw_rates(il, il->ieee_rates);
6395
6396 return 0;
6397
6398err_free_channel_map:
6399 il_free_channel_map(il);
6400err:
6401 return ret;
6402}
6403
6404static void
6405il4965_uninit_drv(struct il_priv *il)
6406{
6407 il_free_geos(il);
6408 il_free_channel_map(il);
6409 kfree(il->scan_cmd);
6410}
6411
6412static void
6413il4965_hw_detect(struct il_priv *il)
6414{
6415 il->hw_rev = _il_rd(il, CSR_HW_REV);
6416 il->hw_wa_rev = _il_rd(il, CSR_HW_REV_WA_REG);
6417 il->rev_id = il->pci_dev->revision;
6418 D_INFO("HW Revision ID = 0x%X\n", il->rev_id);
6419}
6420
6421static const struct il_sensitivity_ranges il4965_sensitivity = {
6422 .min_nrg_cck = 97,
6423 .max_nrg_cck = 0, /* not used, set to 0 */
6424
6425 .auto_corr_min_ofdm = 85,
6426 .auto_corr_min_ofdm_mrc = 170,
6427 .auto_corr_min_ofdm_x1 = 105,
6428 .auto_corr_min_ofdm_mrc_x1 = 220,
6429
6430 .auto_corr_max_ofdm = 120,
6431 .auto_corr_max_ofdm_mrc = 210,
6432 .auto_corr_max_ofdm_x1 = 140,
6433 .auto_corr_max_ofdm_mrc_x1 = 270,
6434
6435 .auto_corr_min_cck = 125,
6436 .auto_corr_max_cck = 200,
6437 .auto_corr_min_cck_mrc = 200,
6438 .auto_corr_max_cck_mrc = 400,
6439
6440 .nrg_th_cck = 100,
6441 .nrg_th_ofdm = 100,
6442
6443 .barker_corr_th_min = 190,
6444 .barker_corr_th_min_mrc = 390,
6445 .nrg_th_cca = 62,
6446};
6447
6448static void
6449il4965_set_hw_params(struct il_priv *il)
6450{
6451 il->hw_params.bcast_id = IL4965_BROADCAST_ID;
6452 il->hw_params.max_rxq_size = RX_QUEUE_SIZE;
6453 il->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
6454 if (il->cfg->mod_params->amsdu_size_8K)
6455 il->hw_params.rx_page_order = get_order(IL_RX_BUF_SIZE_8K);
6456 else
6457 il->hw_params.rx_page_order = get_order(IL_RX_BUF_SIZE_4K);
6458
6459 il->hw_params.max_beacon_itrvl = IL_MAX_UCODE_BEACON_INTERVAL;
6460
6461 if (il->cfg->mod_params->disable_11n)
6462 il->cfg->sku &= ~IL_SKU_N;
6463
6464 if (il->cfg->mod_params->num_of_queues >= IL_MIN_NUM_QUEUES &&
6465 il->cfg->mod_params->num_of_queues <= IL49_NUM_QUEUES)
6466 il->cfg->num_of_queues =
6467 il->cfg->mod_params->num_of_queues;
6468
6469 il->hw_params.max_txq_num = il->cfg->num_of_queues;
6470 il->hw_params.dma_chnl_num = FH49_TCSR_CHNL_NUM;
6471 il->hw_params.scd_bc_tbls_size =
6472 il->cfg->num_of_queues *
6473 sizeof(struct il4965_scd_bc_tbl);
6474
6475 il->hw_params.tfd_size = sizeof(struct il_tfd);
6476 il->hw_params.max_stations = IL4965_STATION_COUNT;
6477 il->hw_params.max_data_size = IL49_RTC_DATA_SIZE;
6478 il->hw_params.max_inst_size = IL49_RTC_INST_SIZE;
6479 il->hw_params.max_bsm_size = BSM_SRAM_SIZE;
6480 il->hw_params.ht40_channel = BIT(IEEE80211_BAND_5GHZ);
6481
6482 il->hw_params.rx_wrt_ptr_reg = FH49_RSCSR_CHNL0_WPTR;
6483
6484 il->hw_params.tx_chains_num = il4965_num_of_ant(il->cfg->valid_tx_ant);
6485 il->hw_params.rx_chains_num = il4965_num_of_ant(il->cfg->valid_rx_ant);
6486 il->hw_params.valid_tx_ant = il->cfg->valid_tx_ant;
6487 il->hw_params.valid_rx_ant = il->cfg->valid_rx_ant;
6488
6489 il->hw_params.ct_kill_threshold =
6490 CELSIUS_TO_KELVIN(CT_KILL_THRESHOLD_LEGACY);
6491
6492 il->hw_params.sens = &il4965_sensitivity;
6493 il->hw_params.beacon_time_tsf_bits = IL4965_EXT_BEACON_TIME_POS;
6494}
6495
6496static int
6497il4965_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
6498{
6499 int err = 0;
6500 struct il_priv *il;
6501 struct ieee80211_hw *hw;
6502 struct il_cfg *cfg = (struct il_cfg *)(ent->driver_data);
6503 unsigned long flags;
6504 u16 pci_cmd;
6505
6506 /************************
6507 * 1. Allocating HW data
6508 ************************/
6509
6510 hw = ieee80211_alloc_hw(sizeof(struct il_priv), &il4965_mac_ops);
6511 if (!hw) {
6512 err = -ENOMEM;
6513 goto out;
6514 }
6515 il = hw->priv;
6516 il->hw = hw;
6517 SET_IEEE80211_DEV(hw, &pdev->dev);
6518
6519 D_INFO("*** LOAD DRIVER ***\n");
6520 il->cfg = cfg;
6521 il->ops = &il4965_ops;
6522#ifdef CONFIG_IWLEGACY_DEBUGFS
6523 il->debugfs_ops = &il4965_debugfs_ops;
6524#endif
6525 il->pci_dev = pdev;
6526 il->inta_mask = CSR_INI_SET_MASK;
6527
6528 /**************************
6529 * 2. Initializing PCI bus
6530 **************************/
6531 pci_disable_link_state(pdev,
6532 PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1 |
6533 PCIE_LINK_STATE_CLKPM);
6534
6535 if (pci_enable_device(pdev)) {
6536 err = -ENODEV;
6537 goto out_ieee80211_free_hw;
6538 }
6539
6540 pci_set_master(pdev);
6541
6542 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(36));
6543 if (!err)
6544 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(36));
6545 if (err) {
6546 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
6547 if (!err)
6548 err =
6549 pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
6550 /* both attempts failed: */
6551 if (err) {
6552 IL_WARN("No suitable DMA available.\n");
6553 goto out_pci_disable_device;
6554 }
6555 }
6556
6557 err = pci_request_regions(pdev, DRV_NAME);
6558 if (err)
6559 goto out_pci_disable_device;
6560
6561 pci_set_drvdata(pdev, il);
6562
6563 /***********************
6564 * 3. Read REV register
6565 ***********************/
6566 il->hw_base = pci_ioremap_bar(pdev, 0);
6567 if (!il->hw_base) {
6568 err = -ENODEV;
6569 goto out_pci_release_regions;
6570 }
6571
6572 D_INFO("pci_resource_len = 0x%08llx\n",
6573 (unsigned long long)pci_resource_len(pdev, 0));
6574 D_INFO("pci_resource_base = %p\n", il->hw_base);
6575
6576 /* these spin locks will be used in apm_ops.init and EEPROM access
6577 * we should init now
6578 */
6579 spin_lock_init(&il->reg_lock);
6580 spin_lock_init(&il->lock);
6581
6582 /*
6583 * stop and reset the on-board processor just in case it is in a
6584 * strange state ... like being left stranded by a primary kernel
6585 * and this is now the kdump kernel trying to start up
6586 */
6587 _il_wr(il, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
6588
6589 il4965_hw_detect(il);
6590 IL_INFO("Detected %s, REV=0x%X\n", il->cfg->name, il->hw_rev);
6591
6592 /* We disable the RETRY_TIMEOUT register (0x41) to keep
6593 * PCI Tx retries from interfering with C3 CPU state */
6594 pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
6595
6596 il4965_prepare_card_hw(il);
6597 if (!il->hw_ready) {
6598 IL_WARN("Failed, HW not ready\n");
6599 err = -EIO;
6600 goto out_iounmap;
6601 }
6602
6603 /*****************
6604 * 4. Read EEPROM
6605 *****************/
6606 /* Read the EEPROM */
6607 err = il_eeprom_init(il);
6608 if (err) {
6609 IL_ERR("Unable to init EEPROM\n");
6610 goto out_iounmap;
6611 }
6612 err = il4965_eeprom_check_version(il);
6613 if (err)
6614 goto out_free_eeprom;
6615
6616 /* extract MAC Address */
6617 il4965_eeprom_get_mac(il, il->addresses[0].addr);
6618 D_INFO("MAC address: %pM\n", il->addresses[0].addr);
6619 il->hw->wiphy->addresses = il->addresses;
6620 il->hw->wiphy->n_addresses = 1;
6621
6622 /************************
6623 * 5. Setup HW constants
6624 ************************/
6625 il4965_set_hw_params(il);
6626
6627 /*******************
6628 * 6. Setup il
6629 *******************/
6630
6631 err = il4965_init_drv(il);
6632 if (err)
6633 goto out_free_eeprom;
6634 /* At this point both hw and il are initialized. */
6635
6636 /********************
6637 * 7. Setup services
6638 ********************/
6639 spin_lock_irqsave(&il->lock, flags);
6640 il_disable_interrupts(il);
6641 spin_unlock_irqrestore(&il->lock, flags);
6642
6643 pci_enable_msi(il->pci_dev);
6644
6645 err = request_irq(il->pci_dev->irq, il_isr, IRQF_SHARED, DRV_NAME, il);
6646 if (err) {
6647 IL_ERR("Error allocating IRQ %d\n", il->pci_dev->irq);
6648 goto out_disable_msi;
6649 }
6650
6651 il4965_setup_deferred_work(il);
6652 il4965_setup_handlers(il);
6653
6654 /*********************************************
6655 * 8. Enable interrupts and read RFKILL state
6656 *********************************************/
6657
6658 /* enable rfkill interrupt: hw bug w/a */
6659 pci_read_config_word(il->pci_dev, PCI_COMMAND, &pci_cmd);
6660 if (pci_cmd & PCI_COMMAND_INTX_DISABLE) {
6661 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
6662 pci_write_config_word(il->pci_dev, PCI_COMMAND, pci_cmd);
6663 }
6664
6665 il_enable_rfkill_int(il);
6666
6667 /* If platform's RF_KILL switch is NOT set to KILL */
6668 if (_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
6669 clear_bit(S_RFKILL, &il->status);
6670 else
6671 set_bit(S_RFKILL, &il->status);
6672
6673 wiphy_rfkill_set_hw_state(il->hw->wiphy,
6674 test_bit(S_RFKILL, &il->status));
6675
6676 il_power_initialize(il);
6677
6678 init_completion(&il->_4965.firmware_loading_complete);
6679
6680 err = il4965_request_firmware(il, true);
6681 if (err)
6682 goto out_destroy_workqueue;
6683
6684 return 0;
6685
6686out_destroy_workqueue:
6687 destroy_workqueue(il->workqueue);
6688 il->workqueue = NULL;
6689 free_irq(il->pci_dev->irq, il);
6690out_disable_msi:
6691 pci_disable_msi(il->pci_dev);
6692 il4965_uninit_drv(il);
6693out_free_eeprom:
6694 il_eeprom_free(il);
6695out_iounmap:
6696 iounmap(il->hw_base);
6697out_pci_release_regions:
6698 pci_release_regions(pdev);
6699out_pci_disable_device:
6700 pci_disable_device(pdev);
6701out_ieee80211_free_hw:
6702 ieee80211_free_hw(il->hw);
6703out:
6704 return err;
6705}
6706
6707static void
6708il4965_pci_remove(struct pci_dev *pdev)
6709{
6710 struct il_priv *il = pci_get_drvdata(pdev);
6711 unsigned long flags;
6712
6713 if (!il)
6714 return;
6715
6716 wait_for_completion(&il->_4965.firmware_loading_complete);
6717
6718 D_INFO("*** UNLOAD DRIVER ***\n");
6719
6720 il_dbgfs_unregister(il);
6721 sysfs_remove_group(&pdev->dev.kobj, &il_attribute_group);
6722
6723 /* ieee80211_unregister_hw call wil cause il_mac_stop to
6724 * to be called and il4965_down since we are removing the device
6725 * we need to set S_EXIT_PENDING bit.
6726 */
6727 set_bit(S_EXIT_PENDING, &il->status);
6728
6729 il_leds_exit(il);
6730
6731 if (il->mac80211_registered) {
6732 ieee80211_unregister_hw(il->hw);
6733 il->mac80211_registered = 0;
6734 } else {
6735 il4965_down(il);
6736 }
6737
6738 /*
6739 * Make sure device is reset to low power before unloading driver.
6740 * This may be redundant with il4965_down(), but there are paths to
6741 * run il4965_down() without calling apm_ops.stop(), and there are
6742 * paths to avoid running il4965_down() at all before leaving driver.
6743 * This (inexpensive) call *makes sure* device is reset.
6744 */
6745 il_apm_stop(il);
6746
6747 /* make sure we flush any pending irq or
6748 * tasklet for the driver
6749 */
6750 spin_lock_irqsave(&il->lock, flags);
6751 il_disable_interrupts(il);
6752 spin_unlock_irqrestore(&il->lock, flags);
6753
6754 il4965_synchronize_irq(il);
6755
6756 il4965_dealloc_ucode_pci(il);
6757
6758 if (il->rxq.bd)
6759 il4965_rx_queue_free(il, &il->rxq);
6760 il4965_hw_txq_ctx_free(il);
6761
6762 il_eeprom_free(il);
6763
6764 /*netif_stop_queue(dev); */
6765 flush_workqueue(il->workqueue);
6766
6767 /* ieee80211_unregister_hw calls il_mac_stop, which flushes
6768 * il->workqueue... so we can't take down the workqueue
6769 * until now... */
6770 destroy_workqueue(il->workqueue);
6771 il->workqueue = NULL;
6772
6773 free_irq(il->pci_dev->irq, il);
6774 pci_disable_msi(il->pci_dev);
6775 iounmap(il->hw_base);
6776 pci_release_regions(pdev);
6777 pci_disable_device(pdev);
6778
6779 il4965_uninit_drv(il);
6780
6781 dev_kfree_skb(il->beacon_skb);
6782
6783 ieee80211_free_hw(il->hw);
6784}
6785
6786/*
6787 * Activate/Deactivate Tx DMA/FIFO channels according tx fifos mask
6788 * must be called under il->lock and mac access
6789 */
6790void
6791il4965_txq_set_sched(struct il_priv *il, u32 mask)
6792{
6793 il_wr_prph(il, IL49_SCD_TXFACT, mask);
6794}
6795
6796/*****************************************************************************
6797 *
6798 * driver and module entry point
6799 *
6800 *****************************************************************************/
6801
6802/* Hardware specific file defines the PCI IDs table for that hardware module */
6803static const struct pci_device_id il4965_hw_card_ids[] = {
6804 {IL_PCI_DEVICE(0x4229, PCI_ANY_ID, il4965_cfg)},
6805 {IL_PCI_DEVICE(0x4230, PCI_ANY_ID, il4965_cfg)},
6806 {0}
6807};
6808MODULE_DEVICE_TABLE(pci, il4965_hw_card_ids);
6809
6810static struct pci_driver il4965_driver = {
6811 .name = DRV_NAME,
6812 .id_table = il4965_hw_card_ids,
6813 .probe = il4965_pci_probe,
6814 .remove = il4965_pci_remove,
6815 .driver.pm = IL_LEGACY_PM_OPS,
6816};
6817
6818static int __init
6819il4965_init(void)
6820{
6821
6822 int ret;
6823 pr_info(DRV_DESCRIPTION ", " DRV_VERSION "\n");
6824 pr_info(DRV_COPYRIGHT "\n");
6825
6826 ret = il4965_rate_control_register();
6827 if (ret) {
6828 pr_err("Unable to register rate control algorithm: %d\n", ret);
6829 return ret;
6830 }
6831
6832 ret = pci_register_driver(&il4965_driver);
6833 if (ret) {
6834 pr_err("Unable to initialize PCI module\n");
6835 goto error_register;
6836 }
6837
6838 return ret;
6839
6840error_register:
6841 il4965_rate_control_unregister();
6842 return ret;
6843}
6844
6845static void __exit
6846il4965_exit(void)
6847{
6848 pci_unregister_driver(&il4965_driver);
6849 il4965_rate_control_unregister();
6850}
6851
6852module_exit(il4965_exit);
6853module_init(il4965_init);
6854
6855#ifdef CONFIG_IWLEGACY_DEBUG
6856module_param_named(debug, il_debug_level, uint, S_IRUGO | S_IWUSR);
6857MODULE_PARM_DESC(debug, "debug output mask");
6858#endif
6859
6860module_param_named(swcrypto, il4965_mod_params.sw_crypto, int, S_IRUGO);
6861MODULE_PARM_DESC(swcrypto, "using crypto in software (default 0 [hardware])");
6862module_param_named(queues_num, il4965_mod_params.num_of_queues, int, S_IRUGO);
6863MODULE_PARM_DESC(queues_num, "number of hw queues.");
6864module_param_named(11n_disable, il4965_mod_params.disable_11n, int, S_IRUGO);
6865MODULE_PARM_DESC(11n_disable, "disable 11n functionality");
6866module_param_named(amsdu_size_8K, il4965_mod_params.amsdu_size_8K, int,
6867 S_IRUGO);
6868MODULE_PARM_DESC(amsdu_size_8K, "enable 8K amsdu size (default 0 [disabled])");
6869module_param_named(fw_restart, il4965_mod_params.restart_fw, int, S_IRUGO);
6870MODULE_PARM_DESC(fw_restart, "restart firmware in case of error");