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1// SPDX-License-Identifier: GPL-2.0-only
2/******************************************************************************
3 *
4 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
5 *
6 * Contact Information:
7 * Intel Linux Wireless <ilw@linux.intel.com>
8 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
9 *****************************************************************************/
10
11#include <linux/kernel.h>
12#include <linux/module.h>
13#include <linux/etherdevice.h>
14#include <linux/sched.h>
15#include <linux/slab.h>
16#include <linux/types.h>
17#include <linux/lockdep.h>
18#include <linux/pci.h>
19#include <linux/dma-mapping.h>
20#include <linux/delay.h>
21#include <linux/skbuff.h>
22#include <net/mac80211.h>
23
24#include "common.h"
25
26int
27_il_poll_bit(struct il_priv *il, u32 addr, u32 bits, u32 mask, int timeout)
28{
29 const int interval = 10; /* microseconds */
30 int t = 0;
31
32 do {
33 if ((_il_rd(il, addr) & mask) == (bits & mask))
34 return t;
35 udelay(interval);
36 t += interval;
37 } while (t < timeout);
38
39 return -ETIMEDOUT;
40}
41EXPORT_SYMBOL(_il_poll_bit);
42
43void
44il_set_bit(struct il_priv *p, u32 r, u32 m)
45{
46 unsigned long reg_flags;
47
48 spin_lock_irqsave(&p->reg_lock, reg_flags);
49 _il_set_bit(p, r, m);
50 spin_unlock_irqrestore(&p->reg_lock, reg_flags);
51}
52EXPORT_SYMBOL(il_set_bit);
53
54void
55il_clear_bit(struct il_priv *p, u32 r, u32 m)
56{
57 unsigned long reg_flags;
58
59 spin_lock_irqsave(&p->reg_lock, reg_flags);
60 _il_clear_bit(p, r, m);
61 spin_unlock_irqrestore(&p->reg_lock, reg_flags);
62}
63EXPORT_SYMBOL(il_clear_bit);
64
65bool
66_il_grab_nic_access(struct il_priv *il)
67{
68 int ret;
69 u32 val;
70
71 /* this bit wakes up the NIC */
72 _il_set_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
73
74 /*
75 * These bits say the device is running, and should keep running for
76 * at least a short while (at least as long as MAC_ACCESS_REQ stays 1),
77 * but they do not indicate that embedded SRAM is restored yet;
78 * 3945 and 4965 have volatile SRAM, and must save/restore contents
79 * to/from host DRAM when sleeping/waking for power-saving.
80 * Each direction takes approximately 1/4 millisecond; with this
81 * overhead, it's a good idea to grab and hold MAC_ACCESS_REQUEST if a
82 * series of register accesses are expected (e.g. reading Event Log),
83 * to keep device from sleeping.
84 *
85 * CSR_UCODE_DRV_GP1 register bit MAC_SLEEP == 0 indicates that
86 * SRAM is okay/restored. We don't check that here because this call
87 * is just for hardware register access; but GP1 MAC_SLEEP check is a
88 * good idea before accessing 3945/4965 SRAM (e.g. reading Event Log).
89 *
90 */
91 ret =
92 _il_poll_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_VAL_MAC_ACCESS_EN,
93 (CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY |
94 CSR_GP_CNTRL_REG_FLAG_GOING_TO_SLEEP), 15000);
95 if (unlikely(ret < 0)) {
96 val = _il_rd(il, CSR_GP_CNTRL);
97 WARN_ONCE(1, "Timeout waiting for ucode processor access "
98 "(CSR_GP_CNTRL 0x%08x)\n", val);
99 _il_wr(il, CSR_RESET, CSR_RESET_REG_FLAG_FORCE_NMI);
100 return false;
101 }
102
103 return true;
104}
105EXPORT_SYMBOL_GPL(_il_grab_nic_access);
106
107int
108il_poll_bit(struct il_priv *il, u32 addr, u32 mask, int timeout)
109{
110 const int interval = 10; /* microseconds */
111 int t = 0;
112
113 do {
114 if ((il_rd(il, addr) & mask) == mask)
115 return t;
116 udelay(interval);
117 t += interval;
118 } while (t < timeout);
119
120 return -ETIMEDOUT;
121}
122EXPORT_SYMBOL(il_poll_bit);
123
124u32
125il_rd_prph(struct il_priv *il, u32 reg)
126{
127 unsigned long reg_flags;
128 u32 val;
129
130 spin_lock_irqsave(&il->reg_lock, reg_flags);
131 _il_grab_nic_access(il);
132 val = _il_rd_prph(il, reg);
133 _il_release_nic_access(il);
134 spin_unlock_irqrestore(&il->reg_lock, reg_flags);
135 return val;
136}
137EXPORT_SYMBOL(il_rd_prph);
138
139void
140il_wr_prph(struct il_priv *il, u32 addr, u32 val)
141{
142 unsigned long reg_flags;
143
144 spin_lock_irqsave(&il->reg_lock, reg_flags);
145 if (likely(_il_grab_nic_access(il))) {
146 _il_wr_prph(il, addr, val);
147 _il_release_nic_access(il);
148 }
149 spin_unlock_irqrestore(&il->reg_lock, reg_flags);
150}
151EXPORT_SYMBOL(il_wr_prph);
152
153u32
154il_read_targ_mem(struct il_priv *il, u32 addr)
155{
156 unsigned long reg_flags;
157 u32 value;
158
159 spin_lock_irqsave(&il->reg_lock, reg_flags);
160 _il_grab_nic_access(il);
161
162 _il_wr(il, HBUS_TARG_MEM_RADDR, addr);
163 value = _il_rd(il, HBUS_TARG_MEM_RDAT);
164
165 _il_release_nic_access(il);
166 spin_unlock_irqrestore(&il->reg_lock, reg_flags);
167 return value;
168}
169EXPORT_SYMBOL(il_read_targ_mem);
170
171void
172il_write_targ_mem(struct il_priv *il, u32 addr, u32 val)
173{
174 unsigned long reg_flags;
175
176 spin_lock_irqsave(&il->reg_lock, reg_flags);
177 if (likely(_il_grab_nic_access(il))) {
178 _il_wr(il, HBUS_TARG_MEM_WADDR, addr);
179 _il_wr(il, HBUS_TARG_MEM_WDAT, val);
180 _il_release_nic_access(il);
181 }
182 spin_unlock_irqrestore(&il->reg_lock, reg_flags);
183}
184EXPORT_SYMBOL(il_write_targ_mem);
185
186const char *
187il_get_cmd_string(u8 cmd)
188{
189 switch (cmd) {
190 IL_CMD(N_ALIVE);
191 IL_CMD(N_ERROR);
192 IL_CMD(C_RXON);
193 IL_CMD(C_RXON_ASSOC);
194 IL_CMD(C_QOS_PARAM);
195 IL_CMD(C_RXON_TIMING);
196 IL_CMD(C_ADD_STA);
197 IL_CMD(C_REM_STA);
198 IL_CMD(C_WEPKEY);
199 IL_CMD(N_3945_RX);
200 IL_CMD(C_TX);
201 IL_CMD(C_RATE_SCALE);
202 IL_CMD(C_LEDS);
203 IL_CMD(C_TX_LINK_QUALITY_CMD);
204 IL_CMD(C_CHANNEL_SWITCH);
205 IL_CMD(N_CHANNEL_SWITCH);
206 IL_CMD(C_SPECTRUM_MEASUREMENT);
207 IL_CMD(N_SPECTRUM_MEASUREMENT);
208 IL_CMD(C_POWER_TBL);
209 IL_CMD(N_PM_SLEEP);
210 IL_CMD(N_PM_DEBUG_STATS);
211 IL_CMD(C_SCAN);
212 IL_CMD(C_SCAN_ABORT);
213 IL_CMD(N_SCAN_START);
214 IL_CMD(N_SCAN_RESULTS);
215 IL_CMD(N_SCAN_COMPLETE);
216 IL_CMD(N_BEACON);
217 IL_CMD(C_TX_BEACON);
218 IL_CMD(C_TX_PWR_TBL);
219 IL_CMD(C_BT_CONFIG);
220 IL_CMD(C_STATS);
221 IL_CMD(N_STATS);
222 IL_CMD(N_CARD_STATE);
223 IL_CMD(N_MISSED_BEACONS);
224 IL_CMD(C_CT_KILL_CONFIG);
225 IL_CMD(C_SENSITIVITY);
226 IL_CMD(C_PHY_CALIBRATION);
227 IL_CMD(N_RX_PHY);
228 IL_CMD(N_RX_MPDU);
229 IL_CMD(N_RX);
230 IL_CMD(N_COMPRESSED_BA);
231 default:
232 return "UNKNOWN";
233
234 }
235}
236EXPORT_SYMBOL(il_get_cmd_string);
237
238#define HOST_COMPLETE_TIMEOUT (HZ / 2)
239
240static void
241il_generic_cmd_callback(struct il_priv *il, struct il_device_cmd *cmd,
242 struct il_rx_pkt *pkt)
243{
244 if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
245 IL_ERR("Bad return from %s (0x%08X)\n",
246 il_get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags);
247 return;
248 }
249#ifdef CONFIG_IWLEGACY_DEBUG
250 switch (cmd->hdr.cmd) {
251 case C_TX_LINK_QUALITY_CMD:
252 case C_SENSITIVITY:
253 D_HC_DUMP("back from %s (0x%08X)\n",
254 il_get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags);
255 break;
256 default:
257 D_HC("back from %s (0x%08X)\n", il_get_cmd_string(cmd->hdr.cmd),
258 pkt->hdr.flags);
259 }
260#endif
261}
262
263static int
264il_send_cmd_async(struct il_priv *il, struct il_host_cmd *cmd)
265{
266 int ret;
267
268 BUG_ON(!(cmd->flags & CMD_ASYNC));
269
270 /* An asynchronous command can not expect an SKB to be set. */
271 BUG_ON(cmd->flags & CMD_WANT_SKB);
272
273 /* Assign a generic callback if one is not provided */
274 if (!cmd->callback)
275 cmd->callback = il_generic_cmd_callback;
276
277 if (test_bit(S_EXIT_PENDING, &il->status))
278 return -EBUSY;
279
280 ret = il_enqueue_hcmd(il, cmd);
281 if (ret < 0) {
282 IL_ERR("Error sending %s: enqueue_hcmd failed: %d\n",
283 il_get_cmd_string(cmd->id), ret);
284 return ret;
285 }
286 return 0;
287}
288
289int
290il_send_cmd_sync(struct il_priv *il, struct il_host_cmd *cmd)
291{
292 int cmd_idx;
293 int ret;
294
295 lockdep_assert_held(&il->mutex);
296
297 BUG_ON(cmd->flags & CMD_ASYNC);
298
299 /* A synchronous command can not have a callback set. */
300 BUG_ON(cmd->callback);
301
302 D_INFO("Attempting to send sync command %s\n",
303 il_get_cmd_string(cmd->id));
304
305 set_bit(S_HCMD_ACTIVE, &il->status);
306 D_INFO("Setting HCMD_ACTIVE for command %s\n",
307 il_get_cmd_string(cmd->id));
308
309 cmd_idx = il_enqueue_hcmd(il, cmd);
310 if (cmd_idx < 0) {
311 ret = cmd_idx;
312 IL_ERR("Error sending %s: enqueue_hcmd failed: %d\n",
313 il_get_cmd_string(cmd->id), ret);
314 goto out;
315 }
316
317 ret = wait_event_timeout(il->wait_command_queue,
318 !test_bit(S_HCMD_ACTIVE, &il->status),
319 HOST_COMPLETE_TIMEOUT);
320 if (!ret) {
321 if (test_bit(S_HCMD_ACTIVE, &il->status)) {
322 IL_ERR("Error sending %s: time out after %dms.\n",
323 il_get_cmd_string(cmd->id),
324 jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
325
326 clear_bit(S_HCMD_ACTIVE, &il->status);
327 D_INFO("Clearing HCMD_ACTIVE for command %s\n",
328 il_get_cmd_string(cmd->id));
329 ret = -ETIMEDOUT;
330 goto cancel;
331 }
332 }
333
334 if (test_bit(S_RFKILL, &il->status)) {
335 IL_ERR("Command %s aborted: RF KILL Switch\n",
336 il_get_cmd_string(cmd->id));
337 ret = -ECANCELED;
338 goto fail;
339 }
340 if (test_bit(S_FW_ERROR, &il->status)) {
341 IL_ERR("Command %s failed: FW Error\n",
342 il_get_cmd_string(cmd->id));
343 ret = -EIO;
344 goto fail;
345 }
346 if ((cmd->flags & CMD_WANT_SKB) && !cmd->reply_page) {
347 IL_ERR("Error: Response NULL in '%s'\n",
348 il_get_cmd_string(cmd->id));
349 ret = -EIO;
350 goto cancel;
351 }
352
353 ret = 0;
354 goto out;
355
356cancel:
357 if (cmd->flags & CMD_WANT_SKB) {
358 /*
359 * Cancel the CMD_WANT_SKB flag for the cmd in the
360 * TX cmd queue. Otherwise in case the cmd comes
361 * in later, it will possibly set an invalid
362 * address (cmd->meta.source).
363 */
364 il->txq[il->cmd_queue].meta[cmd_idx].flags &= ~CMD_WANT_SKB;
365 }
366fail:
367 if (cmd->reply_page) {
368 il_free_pages(il, cmd->reply_page);
369 cmd->reply_page = 0;
370 }
371out:
372 return ret;
373}
374EXPORT_SYMBOL(il_send_cmd_sync);
375
376int
377il_send_cmd(struct il_priv *il, struct il_host_cmd *cmd)
378{
379 if (cmd->flags & CMD_ASYNC)
380 return il_send_cmd_async(il, cmd);
381
382 return il_send_cmd_sync(il, cmd);
383}
384EXPORT_SYMBOL(il_send_cmd);
385
386int
387il_send_cmd_pdu(struct il_priv *il, u8 id, u16 len, const void *data)
388{
389 struct il_host_cmd cmd = {
390 .id = id,
391 .len = len,
392 .data = data,
393 };
394
395 return il_send_cmd_sync(il, &cmd);
396}
397EXPORT_SYMBOL(il_send_cmd_pdu);
398
399int
400il_send_cmd_pdu_async(struct il_priv *il, u8 id, u16 len, const void *data,
401 void (*callback) (struct il_priv *il,
402 struct il_device_cmd *cmd,
403 struct il_rx_pkt *pkt))
404{
405 struct il_host_cmd cmd = {
406 .id = id,
407 .len = len,
408 .data = data,
409 };
410
411 cmd.flags |= CMD_ASYNC;
412 cmd.callback = callback;
413
414 return il_send_cmd_async(il, &cmd);
415}
416EXPORT_SYMBOL(il_send_cmd_pdu_async);
417
418/* default: IL_LED_BLINK(0) using blinking idx table */
419static int led_mode;
420module_param(led_mode, int, 0444);
421MODULE_PARM_DESC(led_mode,
422 "0=system default, " "1=On(RF On)/Off(RF Off), 2=blinking");
423
424/* Throughput OFF time(ms) ON time (ms)
425 * >300 25 25
426 * >200 to 300 40 40
427 * >100 to 200 55 55
428 * >70 to 100 65 65
429 * >50 to 70 75 75
430 * >20 to 50 85 85
431 * >10 to 20 95 95
432 * >5 to 10 110 110
433 * >1 to 5 130 130
434 * >0 to 1 167 167
435 * <=0 SOLID ON
436 */
437static const struct ieee80211_tpt_blink il_blink[] = {
438 {.throughput = 0, .blink_time = 334},
439 {.throughput = 1 * 1024 - 1, .blink_time = 260},
440 {.throughput = 5 * 1024 - 1, .blink_time = 220},
441 {.throughput = 10 * 1024 - 1, .blink_time = 190},
442 {.throughput = 20 * 1024 - 1, .blink_time = 170},
443 {.throughput = 50 * 1024 - 1, .blink_time = 150},
444 {.throughput = 70 * 1024 - 1, .blink_time = 130},
445 {.throughput = 100 * 1024 - 1, .blink_time = 110},
446 {.throughput = 200 * 1024 - 1, .blink_time = 80},
447 {.throughput = 300 * 1024 - 1, .blink_time = 50},
448};
449
450/*
451 * Adjust led blink rate to compensate on a MAC Clock difference on every HW
452 * Led blink rate analysis showed an average deviation of 0% on 3945,
453 * 5% on 4965 HW.
454 * Need to compensate on the led on/off time per HW according to the deviation
455 * to achieve the desired led frequency
456 * The calculation is: (100-averageDeviation)/100 * blinkTime
457 * For code efficiency the calculation will be:
458 * compensation = (100 - averageDeviation) * 64 / 100
459 * NewBlinkTime = (compensation * BlinkTime) / 64
460 */
461static inline u8
462il_blink_compensation(struct il_priv *il, u8 time, u16 compensation)
463{
464 if (!compensation) {
465 IL_ERR("undefined blink compensation: "
466 "use pre-defined blinking time\n");
467 return time;
468 }
469
470 return (u8) ((time * compensation) >> 6);
471}
472
473/* Set led pattern command */
474static int
475il_led_cmd(struct il_priv *il, unsigned long on, unsigned long off)
476{
477 struct il_led_cmd led_cmd = {
478 .id = IL_LED_LINK,
479 .interval = IL_DEF_LED_INTRVL
480 };
481 int ret;
482
483 if (!test_bit(S_READY, &il->status))
484 return -EBUSY;
485
486 if (il->blink_on == on && il->blink_off == off)
487 return 0;
488
489 if (off == 0) {
490 /* led is SOLID_ON */
491 on = IL_LED_SOLID;
492 }
493
494 D_LED("Led blink time compensation=%u\n",
495 il->cfg->led_compensation);
496 led_cmd.on =
497 il_blink_compensation(il, on,
498 il->cfg->led_compensation);
499 led_cmd.off =
500 il_blink_compensation(il, off,
501 il->cfg->led_compensation);
502
503 ret = il->ops->send_led_cmd(il, &led_cmd);
504 if (!ret) {
505 il->blink_on = on;
506 il->blink_off = off;
507 }
508 return ret;
509}
510
511static void
512il_led_brightness_set(struct led_classdev *led_cdev,
513 enum led_brightness brightness)
514{
515 struct il_priv *il = container_of(led_cdev, struct il_priv, led);
516 unsigned long on = 0;
517
518 if (brightness > 0)
519 on = IL_LED_SOLID;
520
521 il_led_cmd(il, on, 0);
522}
523
524static int
525il_led_blink_set(struct led_classdev *led_cdev, unsigned long *delay_on,
526 unsigned long *delay_off)
527{
528 struct il_priv *il = container_of(led_cdev, struct il_priv, led);
529
530 return il_led_cmd(il, *delay_on, *delay_off);
531}
532
533void
534il_leds_init(struct il_priv *il)
535{
536 int mode = led_mode;
537 int ret;
538
539 if (mode == IL_LED_DEFAULT)
540 mode = il->cfg->led_mode;
541
542 il->led.name =
543 kasprintf(GFP_KERNEL, "%s-led", wiphy_name(il->hw->wiphy));
544 il->led.brightness_set = il_led_brightness_set;
545 il->led.blink_set = il_led_blink_set;
546 il->led.max_brightness = 1;
547
548 switch (mode) {
549 case IL_LED_DEFAULT:
550 WARN_ON(1);
551 break;
552 case IL_LED_BLINK:
553 il->led.default_trigger =
554 ieee80211_create_tpt_led_trigger(il->hw,
555 IEEE80211_TPT_LEDTRIG_FL_CONNECTED,
556 il_blink,
557 ARRAY_SIZE(il_blink));
558 break;
559 case IL_LED_RF_STATE:
560 il->led.default_trigger = ieee80211_get_radio_led_name(il->hw);
561 break;
562 }
563
564 ret = led_classdev_register(&il->pci_dev->dev, &il->led);
565 if (ret) {
566 kfree(il->led.name);
567 return;
568 }
569
570 il->led_registered = true;
571}
572EXPORT_SYMBOL(il_leds_init);
573
574void
575il_leds_exit(struct il_priv *il)
576{
577 if (!il->led_registered)
578 return;
579
580 led_classdev_unregister(&il->led);
581 kfree(il->led.name);
582}
583EXPORT_SYMBOL(il_leds_exit);
584
585/************************** EEPROM BANDS ****************************
586 *
587 * The il_eeprom_band definitions below provide the mapping from the
588 * EEPROM contents to the specific channel number supported for each
589 * band.
590 *
591 * For example, il_priv->eeprom.band_3_channels[4] from the band_3
592 * definition below maps to physical channel 42 in the 5.2GHz spectrum.
593 * The specific geography and calibration information for that channel
594 * is contained in the eeprom map itself.
595 *
596 * During init, we copy the eeprom information and channel map
597 * information into il->channel_info_24/52 and il->channel_map_24/52
598 *
599 * channel_map_24/52 provides the idx in the channel_info array for a
600 * given channel. We have to have two separate maps as there is channel
601 * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
602 * band_2
603 *
604 * A value of 0xff stored in the channel_map indicates that the channel
605 * is not supported by the hardware at all.
606 *
607 * A value of 0xfe in the channel_map indicates that the channel is not
608 * valid for Tx with the current hardware. This means that
609 * while the system can tune and receive on a given channel, it may not
610 * be able to associate or transmit any frames on that
611 * channel. There is no corresponding channel information for that
612 * entry.
613 *
614 *********************************************************************/
615
616/* 2.4 GHz */
617const u8 il_eeprom_band_1[14] = {
618 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
619};
620
621/* 5.2 GHz bands */
622static const u8 il_eeprom_band_2[] = { /* 4915-5080MHz */
623 183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
624};
625
626static const u8 il_eeprom_band_3[] = { /* 5170-5320MHz */
627 34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
628};
629
630static const u8 il_eeprom_band_4[] = { /* 5500-5700MHz */
631 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
632};
633
634static const u8 il_eeprom_band_5[] = { /* 5725-5825MHz */
635 145, 149, 153, 157, 161, 165
636};
637
638static const u8 il_eeprom_band_6[] = { /* 2.4 ht40 channel */
639 1, 2, 3, 4, 5, 6, 7
640};
641
642static const u8 il_eeprom_band_7[] = { /* 5.2 ht40 channel */
643 36, 44, 52, 60, 100, 108, 116, 124, 132, 149, 157
644};
645
646/******************************************************************************
647 *
648 * EEPROM related functions
649 *
650******************************************************************************/
651
652static int
653il_eeprom_verify_signature(struct il_priv *il)
654{
655 u32 gp = _il_rd(il, CSR_EEPROM_GP) & CSR_EEPROM_GP_VALID_MSK;
656 int ret = 0;
657
658 D_EEPROM("EEPROM signature=0x%08x\n", gp);
659 switch (gp) {
660 case CSR_EEPROM_GP_GOOD_SIG_EEP_LESS_THAN_4K:
661 case CSR_EEPROM_GP_GOOD_SIG_EEP_MORE_THAN_4K:
662 break;
663 default:
664 IL_ERR("bad EEPROM signature," "EEPROM_GP=0x%08x\n", gp);
665 ret = -ENOENT;
666 break;
667 }
668 return ret;
669}
670
671const u8 *
672il_eeprom_query_addr(const struct il_priv *il, size_t offset)
673{
674 BUG_ON(offset >= il->cfg->eeprom_size);
675 return &il->eeprom[offset];
676}
677EXPORT_SYMBOL(il_eeprom_query_addr);
678
679u16
680il_eeprom_query16(const struct il_priv *il, size_t offset)
681{
682 if (!il->eeprom)
683 return 0;
684 return (u16) il->eeprom[offset] | ((u16) il->eeprom[offset + 1] << 8);
685}
686EXPORT_SYMBOL(il_eeprom_query16);
687
688/*
689 * il_eeprom_init - read EEPROM contents
690 *
691 * Load the EEPROM contents from adapter into il->eeprom
692 *
693 * NOTE: This routine uses the non-debug IO access functions.
694 */
695int
696il_eeprom_init(struct il_priv *il)
697{
698 __le16 *e;
699 u32 gp = _il_rd(il, CSR_EEPROM_GP);
700 int sz;
701 int ret;
702 int addr;
703
704 /* allocate eeprom */
705 sz = il->cfg->eeprom_size;
706 D_EEPROM("NVM size = %d\n", sz);
707 il->eeprom = kzalloc(sz, GFP_KERNEL);
708 if (!il->eeprom)
709 return -ENOMEM;
710
711 e = (__le16 *) il->eeprom;
712
713 il->ops->apm_init(il);
714
715 ret = il_eeprom_verify_signature(il);
716 if (ret < 0) {
717 IL_ERR("EEPROM not found, EEPROM_GP=0x%08x\n", gp);
718 ret = -ENOENT;
719 goto err;
720 }
721
722 /* Make sure driver (instead of uCode) is allowed to read EEPROM */
723 ret = il->ops->eeprom_acquire_semaphore(il);
724 if (ret < 0) {
725 IL_ERR("Failed to acquire EEPROM semaphore.\n");
726 ret = -ENOENT;
727 goto err;
728 }
729
730 /* eeprom is an array of 16bit values */
731 for (addr = 0; addr < sz; addr += sizeof(u16)) {
732 u32 r;
733
734 _il_wr(il, CSR_EEPROM_REG,
735 CSR_EEPROM_REG_MSK_ADDR & (addr << 1));
736
737 ret =
738 _il_poll_bit(il, CSR_EEPROM_REG,
739 CSR_EEPROM_REG_READ_VALID_MSK,
740 CSR_EEPROM_REG_READ_VALID_MSK,
741 IL_EEPROM_ACCESS_TIMEOUT);
742 if (ret < 0) {
743 IL_ERR("Time out reading EEPROM[%d]\n", addr);
744 goto done;
745 }
746 r = _il_rd(il, CSR_EEPROM_REG);
747 e[addr / 2] = cpu_to_le16(r >> 16);
748 }
749
750 D_EEPROM("NVM Type: %s, version: 0x%x\n", "EEPROM",
751 il_eeprom_query16(il, EEPROM_VERSION));
752
753 ret = 0;
754done:
755 il->ops->eeprom_release_semaphore(il);
756
757err:
758 if (ret)
759 il_eeprom_free(il);
760 /* Reset chip to save power until we load uCode during "up". */
761 il_apm_stop(il);
762 return ret;
763}
764EXPORT_SYMBOL(il_eeprom_init);
765
766void
767il_eeprom_free(struct il_priv *il)
768{
769 kfree(il->eeprom);
770 il->eeprom = NULL;
771}
772EXPORT_SYMBOL(il_eeprom_free);
773
774static void
775il_init_band_reference(const struct il_priv *il, int eep_band,
776 int *eeprom_ch_count,
777 const struct il_eeprom_channel **eeprom_ch_info,
778 const u8 **eeprom_ch_idx)
779{
780 u32 offset = il->cfg->regulatory_bands[eep_band - 1];
781
782 switch (eep_band) {
783 case 1: /* 2.4GHz band */
784 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_1);
785 *eeprom_ch_info =
786 (struct il_eeprom_channel *)il_eeprom_query_addr(il,
787 offset);
788 *eeprom_ch_idx = il_eeprom_band_1;
789 break;
790 case 2: /* 4.9GHz band */
791 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_2);
792 *eeprom_ch_info =
793 (struct il_eeprom_channel *)il_eeprom_query_addr(il,
794 offset);
795 *eeprom_ch_idx = il_eeprom_band_2;
796 break;
797 case 3: /* 5.2GHz band */
798 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_3);
799 *eeprom_ch_info =
800 (struct il_eeprom_channel *)il_eeprom_query_addr(il,
801 offset);
802 *eeprom_ch_idx = il_eeprom_band_3;
803 break;
804 case 4: /* 5.5GHz band */
805 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_4);
806 *eeprom_ch_info =
807 (struct il_eeprom_channel *)il_eeprom_query_addr(il,
808 offset);
809 *eeprom_ch_idx = il_eeprom_band_4;
810 break;
811 case 5: /* 5.7GHz band */
812 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_5);
813 *eeprom_ch_info =
814 (struct il_eeprom_channel *)il_eeprom_query_addr(il,
815 offset);
816 *eeprom_ch_idx = il_eeprom_band_5;
817 break;
818 case 6: /* 2.4GHz ht40 channels */
819 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_6);
820 *eeprom_ch_info =
821 (struct il_eeprom_channel *)il_eeprom_query_addr(il,
822 offset);
823 *eeprom_ch_idx = il_eeprom_band_6;
824 break;
825 case 7: /* 5 GHz ht40 channels */
826 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_7);
827 *eeprom_ch_info =
828 (struct il_eeprom_channel *)il_eeprom_query_addr(il,
829 offset);
830 *eeprom_ch_idx = il_eeprom_band_7;
831 break;
832 default:
833 BUG();
834 }
835}
836
837#define CHECK_AND_PRINT(x) ((eeprom_ch->flags & EEPROM_CHANNEL_##x) \
838 ? # x " " : "")
839/*
840 * il_mod_ht40_chan_info - Copy ht40 channel info into driver's il.
841 *
842 * Does not set up a command, or touch hardware.
843 */
844static int
845il_mod_ht40_chan_info(struct il_priv *il, enum nl80211_band band, u16 channel,
846 const struct il_eeprom_channel *eeprom_ch,
847 u8 clear_ht40_extension_channel)
848{
849 struct il_channel_info *ch_info;
850
851 ch_info =
852 (struct il_channel_info *)il_get_channel_info(il, band, channel);
853
854 if (!il_is_channel_valid(ch_info))
855 return -1;
856
857 D_EEPROM("HT40 Ch. %d [%sGHz] %s%s%s%s%s(0x%02x %ddBm):"
858 " Ad-Hoc %ssupported\n", ch_info->channel,
859 il_is_channel_a_band(ch_info) ? "5.2" : "2.4",
860 CHECK_AND_PRINT(IBSS), CHECK_AND_PRINT(ACTIVE),
861 CHECK_AND_PRINT(RADAR), CHECK_AND_PRINT(WIDE),
862 CHECK_AND_PRINT(DFS), eeprom_ch->flags,
863 eeprom_ch->max_power_avg,
864 ((eeprom_ch->flags & EEPROM_CHANNEL_IBSS) &&
865 !(eeprom_ch->flags & EEPROM_CHANNEL_RADAR)) ? "" : "not ");
866
867 ch_info->ht40_eeprom = *eeprom_ch;
868 ch_info->ht40_max_power_avg = eeprom_ch->max_power_avg;
869 ch_info->ht40_flags = eeprom_ch->flags;
870 if (eeprom_ch->flags & EEPROM_CHANNEL_VALID)
871 ch_info->ht40_extension_channel &=
872 ~clear_ht40_extension_channel;
873
874 return 0;
875}
876
877#define CHECK_AND_PRINT_I(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
878 ? # x " " : "")
879
880/*
881 * il_init_channel_map - Set up driver's info for all possible channels
882 */
883int
884il_init_channel_map(struct il_priv *il)
885{
886 int eeprom_ch_count = 0;
887 const u8 *eeprom_ch_idx = NULL;
888 const struct il_eeprom_channel *eeprom_ch_info = NULL;
889 int band, ch;
890 struct il_channel_info *ch_info;
891
892 if (il->channel_count) {
893 D_EEPROM("Channel map already initialized.\n");
894 return 0;
895 }
896
897 D_EEPROM("Initializing regulatory info from EEPROM\n");
898
899 il->channel_count =
900 ARRAY_SIZE(il_eeprom_band_1) + ARRAY_SIZE(il_eeprom_band_2) +
901 ARRAY_SIZE(il_eeprom_band_3) + ARRAY_SIZE(il_eeprom_band_4) +
902 ARRAY_SIZE(il_eeprom_band_5);
903
904 D_EEPROM("Parsing data for %d channels.\n", il->channel_count);
905
906 il->channel_info =
907 kcalloc(il->channel_count, sizeof(struct il_channel_info),
908 GFP_KERNEL);
909 if (!il->channel_info) {
910 IL_ERR("Could not allocate channel_info\n");
911 il->channel_count = 0;
912 return -ENOMEM;
913 }
914
915 ch_info = il->channel_info;
916
917 /* Loop through the 5 EEPROM bands adding them in order to the
918 * channel map we maintain (that contains additional information than
919 * what just in the EEPROM) */
920 for (band = 1; band <= 5; band++) {
921
922 il_init_band_reference(il, band, &eeprom_ch_count,
923 &eeprom_ch_info, &eeprom_ch_idx);
924
925 /* Loop through each band adding each of the channels */
926 for (ch = 0; ch < eeprom_ch_count; ch++) {
927 ch_info->channel = eeprom_ch_idx[ch];
928 ch_info->band =
929 (band ==
930 1) ? NL80211_BAND_2GHZ : NL80211_BAND_5GHZ;
931
932 /* permanently store EEPROM's channel regulatory flags
933 * and max power in channel info database. */
934 ch_info->eeprom = eeprom_ch_info[ch];
935
936 /* Copy the run-time flags so they are there even on
937 * invalid channels */
938 ch_info->flags = eeprom_ch_info[ch].flags;
939 /* First write that ht40 is not enabled, and then enable
940 * one by one */
941 ch_info->ht40_extension_channel =
942 IEEE80211_CHAN_NO_HT40;
943
944 if (!(il_is_channel_valid(ch_info))) {
945 D_EEPROM("Ch. %d Flags %x [%sGHz] - "
946 "No traffic\n", ch_info->channel,
947 ch_info->flags,
948 il_is_channel_a_band(ch_info) ? "5.2" :
949 "2.4");
950 ch_info++;
951 continue;
952 }
953
954 /* Initialize regulatory-based run-time data */
955 ch_info->max_power_avg = ch_info->curr_txpow =
956 eeprom_ch_info[ch].max_power_avg;
957 ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
958 ch_info->min_power = 0;
959
960 D_EEPROM("Ch. %d [%sGHz] " "%s%s%s%s%s%s(0x%02x %ddBm):"
961 " Ad-Hoc %ssupported\n", ch_info->channel,
962 il_is_channel_a_band(ch_info) ? "5.2" : "2.4",
963 CHECK_AND_PRINT_I(VALID),
964 CHECK_AND_PRINT_I(IBSS),
965 CHECK_AND_PRINT_I(ACTIVE),
966 CHECK_AND_PRINT_I(RADAR),
967 CHECK_AND_PRINT_I(WIDE),
968 CHECK_AND_PRINT_I(DFS),
969 eeprom_ch_info[ch].flags,
970 eeprom_ch_info[ch].max_power_avg,
971 ((eeprom_ch_info[ch].
972 flags & EEPROM_CHANNEL_IBSS) &&
973 !(eeprom_ch_info[ch].
974 flags & EEPROM_CHANNEL_RADAR)) ? "" :
975 "not ");
976
977 ch_info++;
978 }
979 }
980
981 /* Check if we do have HT40 channels */
982 if (il->cfg->regulatory_bands[5] == EEPROM_REGULATORY_BAND_NO_HT40 &&
983 il->cfg->regulatory_bands[6] == EEPROM_REGULATORY_BAND_NO_HT40)
984 return 0;
985
986 /* Two additional EEPROM bands for 2.4 and 5 GHz HT40 channels */
987 for (band = 6; band <= 7; band++) {
988 enum nl80211_band ieeeband;
989
990 il_init_band_reference(il, band, &eeprom_ch_count,
991 &eeprom_ch_info, &eeprom_ch_idx);
992
993 /* EEPROM band 6 is 2.4, band 7 is 5 GHz */
994 ieeeband =
995 (band == 6) ? NL80211_BAND_2GHZ : NL80211_BAND_5GHZ;
996
997 /* Loop through each band adding each of the channels */
998 for (ch = 0; ch < eeprom_ch_count; ch++) {
999 /* Set up driver's info for lower half */
1000 il_mod_ht40_chan_info(il, ieeeband, eeprom_ch_idx[ch],
1001 &eeprom_ch_info[ch],
1002 IEEE80211_CHAN_NO_HT40PLUS);
1003
1004 /* Set up driver's info for upper half */
1005 il_mod_ht40_chan_info(il, ieeeband,
1006 eeprom_ch_idx[ch] + 4,
1007 &eeprom_ch_info[ch],
1008 IEEE80211_CHAN_NO_HT40MINUS);
1009 }
1010 }
1011
1012 return 0;
1013}
1014EXPORT_SYMBOL(il_init_channel_map);
1015
1016/*
1017 * il_free_channel_map - undo allocations in il_init_channel_map
1018 */
1019void
1020il_free_channel_map(struct il_priv *il)
1021{
1022 kfree(il->channel_info);
1023 il->channel_count = 0;
1024}
1025EXPORT_SYMBOL(il_free_channel_map);
1026
1027/*
1028 * il_get_channel_info - Find driver's ilate channel info
1029 *
1030 * Based on band and channel number.
1031 */
1032const struct il_channel_info *
1033il_get_channel_info(const struct il_priv *il, enum nl80211_band band,
1034 u16 channel)
1035{
1036 int i;
1037
1038 switch (band) {
1039 case NL80211_BAND_5GHZ:
1040 for (i = 14; i < il->channel_count; i++) {
1041 if (il->channel_info[i].channel == channel)
1042 return &il->channel_info[i];
1043 }
1044 break;
1045 case NL80211_BAND_2GHZ:
1046 if (channel >= 1 && channel <= 14)
1047 return &il->channel_info[channel - 1];
1048 break;
1049 default:
1050 BUG();
1051 }
1052
1053 return NULL;
1054}
1055EXPORT_SYMBOL(il_get_channel_info);
1056
1057/*
1058 * Setting power level allows the card to go to sleep when not busy.
1059 *
1060 * We calculate a sleep command based on the required latency, which
1061 * we get from mac80211.
1062 */
1063
1064#define SLP_VEC(X0, X1, X2, X3, X4) { \
1065 cpu_to_le32(X0), \
1066 cpu_to_le32(X1), \
1067 cpu_to_le32(X2), \
1068 cpu_to_le32(X3), \
1069 cpu_to_le32(X4) \
1070}
1071
1072static void
1073il_build_powertable_cmd(struct il_priv *il, struct il_powertable_cmd *cmd)
1074{
1075 static const __le32 interval[3][IL_POWER_VEC_SIZE] = {
1076 SLP_VEC(2, 2, 4, 6, 0xFF),
1077 SLP_VEC(2, 4, 7, 10, 10),
1078 SLP_VEC(4, 7, 10, 10, 0xFF)
1079 };
1080 int i, dtim_period, no_dtim;
1081 u32 max_sleep;
1082 bool skip;
1083
1084 memset(cmd, 0, sizeof(*cmd));
1085
1086 if (il->power_data.pci_pm)
1087 cmd->flags |= IL_POWER_PCI_PM_MSK;
1088
1089 /* if no Power Save, we are done */
1090 if (il->power_data.ps_disabled)
1091 return;
1092
1093 cmd->flags = IL_POWER_DRIVER_ALLOW_SLEEP_MSK;
1094 cmd->keep_alive_seconds = 0;
1095 cmd->debug_flags = 0;
1096 cmd->rx_data_timeout = cpu_to_le32(25 * 1024);
1097 cmd->tx_data_timeout = cpu_to_le32(25 * 1024);
1098 cmd->keep_alive_beacons = 0;
1099
1100 dtim_period = il->vif ? il->vif->bss_conf.dtim_period : 0;
1101
1102 if (dtim_period <= 2) {
1103 memcpy(cmd->sleep_interval, interval[0], sizeof(interval[0]));
1104 no_dtim = 2;
1105 } else if (dtim_period <= 10) {
1106 memcpy(cmd->sleep_interval, interval[1], sizeof(interval[1]));
1107 no_dtim = 2;
1108 } else {
1109 memcpy(cmd->sleep_interval, interval[2], sizeof(interval[2]));
1110 no_dtim = 0;
1111 }
1112
1113 if (dtim_period == 0) {
1114 dtim_period = 1;
1115 skip = false;
1116 } else {
1117 skip = !!no_dtim;
1118 }
1119
1120 if (skip) {
1121 __le32 tmp = cmd->sleep_interval[IL_POWER_VEC_SIZE - 1];
1122
1123 max_sleep = le32_to_cpu(tmp);
1124 if (max_sleep == 0xFF)
1125 max_sleep = dtim_period * (skip + 1);
1126 else if (max_sleep > dtim_period)
1127 max_sleep = (max_sleep / dtim_period) * dtim_period;
1128 cmd->flags |= IL_POWER_SLEEP_OVER_DTIM_MSK;
1129 } else {
1130 max_sleep = dtim_period;
1131 cmd->flags &= ~IL_POWER_SLEEP_OVER_DTIM_MSK;
1132 }
1133
1134 for (i = 0; i < IL_POWER_VEC_SIZE; i++)
1135 if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
1136 cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
1137}
1138
1139static int
1140il_set_power(struct il_priv *il, struct il_powertable_cmd *cmd)
1141{
1142 D_POWER("Sending power/sleep command\n");
1143 D_POWER("Flags value = 0x%08X\n", cmd->flags);
1144 D_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
1145 D_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
1146 D_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
1147 le32_to_cpu(cmd->sleep_interval[0]),
1148 le32_to_cpu(cmd->sleep_interval[1]),
1149 le32_to_cpu(cmd->sleep_interval[2]),
1150 le32_to_cpu(cmd->sleep_interval[3]),
1151 le32_to_cpu(cmd->sleep_interval[4]));
1152
1153 return il_send_cmd_pdu(il, C_POWER_TBL,
1154 sizeof(struct il_powertable_cmd), cmd);
1155}
1156
1157static int
1158il_power_set_mode(struct il_priv *il, struct il_powertable_cmd *cmd, bool force)
1159{
1160 int ret;
1161 bool update_chains;
1162
1163 lockdep_assert_held(&il->mutex);
1164
1165 /* Don't update the RX chain when chain noise calibration is running */
1166 update_chains = il->chain_noise_data.state == IL_CHAIN_NOISE_DONE ||
1167 il->chain_noise_data.state == IL_CHAIN_NOISE_ALIVE;
1168
1169 if (!memcmp(&il->power_data.sleep_cmd, cmd, sizeof(*cmd)) && !force)
1170 return 0;
1171
1172 if (!il_is_ready_rf(il))
1173 return -EIO;
1174
1175 /* scan complete use sleep_power_next, need to be updated */
1176 memcpy(&il->power_data.sleep_cmd_next, cmd, sizeof(*cmd));
1177 if (test_bit(S_SCANNING, &il->status) && !force) {
1178 D_INFO("Defer power set mode while scanning\n");
1179 return 0;
1180 }
1181
1182 if (cmd->flags & IL_POWER_DRIVER_ALLOW_SLEEP_MSK)
1183 set_bit(S_POWER_PMI, &il->status);
1184
1185 ret = il_set_power(il, cmd);
1186 if (!ret) {
1187 if (!(cmd->flags & IL_POWER_DRIVER_ALLOW_SLEEP_MSK))
1188 clear_bit(S_POWER_PMI, &il->status);
1189
1190 if (il->ops->update_chain_flags && update_chains)
1191 il->ops->update_chain_flags(il);
1192 else if (il->ops->update_chain_flags)
1193 D_POWER("Cannot update the power, chain noise "
1194 "calibration running: %d\n",
1195 il->chain_noise_data.state);
1196
1197 memcpy(&il->power_data.sleep_cmd, cmd, sizeof(*cmd));
1198 } else
1199 IL_ERR("set power fail, ret = %d", ret);
1200
1201 return ret;
1202}
1203
1204int
1205il_power_update_mode(struct il_priv *il, bool force)
1206{
1207 struct il_powertable_cmd cmd;
1208
1209 il_build_powertable_cmd(il, &cmd);
1210
1211 return il_power_set_mode(il, &cmd, force);
1212}
1213EXPORT_SYMBOL(il_power_update_mode);
1214
1215/* initialize to default */
1216void
1217il_power_initialize(struct il_priv *il)
1218{
1219 u16 lctl;
1220
1221 pcie_capability_read_word(il->pci_dev, PCI_EXP_LNKCTL, &lctl);
1222 il->power_data.pci_pm = !(lctl & PCI_EXP_LNKCTL_ASPM_L0S);
1223
1224 il->power_data.debug_sleep_level_override = -1;
1225
1226 memset(&il->power_data.sleep_cmd, 0, sizeof(il->power_data.sleep_cmd));
1227}
1228EXPORT_SYMBOL(il_power_initialize);
1229
1230/* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
1231 * sending probe req. This should be set long enough to hear probe responses
1232 * from more than one AP. */
1233#define IL_ACTIVE_DWELL_TIME_24 (30) /* all times in msec */
1234#define IL_ACTIVE_DWELL_TIME_52 (20)
1235
1236#define IL_ACTIVE_DWELL_FACTOR_24GHZ (3)
1237#define IL_ACTIVE_DWELL_FACTOR_52GHZ (2)
1238
1239/* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
1240 * Must be set longer than active dwell time.
1241 * For the most reliable scan, set > AP beacon interval (typically 100msec). */
1242#define IL_PASSIVE_DWELL_TIME_24 (20) /* all times in msec */
1243#define IL_PASSIVE_DWELL_TIME_52 (10)
1244#define IL_PASSIVE_DWELL_BASE (100)
1245#define IL_CHANNEL_TUNE_TIME 5
1246
1247static int
1248il_send_scan_abort(struct il_priv *il)
1249{
1250 int ret;
1251 struct il_rx_pkt *pkt;
1252 struct il_host_cmd cmd = {
1253 .id = C_SCAN_ABORT,
1254 .flags = CMD_WANT_SKB,
1255 };
1256
1257 /* Exit instantly with error when device is not ready
1258 * to receive scan abort command or it does not perform
1259 * hardware scan currently */
1260 if (!test_bit(S_READY, &il->status) ||
1261 !test_bit(S_GEO_CONFIGURED, &il->status) ||
1262 !test_bit(S_SCAN_HW, &il->status) ||
1263 test_bit(S_FW_ERROR, &il->status) ||
1264 test_bit(S_EXIT_PENDING, &il->status))
1265 return -EIO;
1266
1267 ret = il_send_cmd_sync(il, &cmd);
1268 if (ret)
1269 return ret;
1270
1271 pkt = (struct il_rx_pkt *)cmd.reply_page;
1272 if (pkt->u.status != CAN_ABORT_STATUS) {
1273 /* The scan abort will return 1 for success or
1274 * 2 for "failure". A failure condition can be
1275 * due to simply not being in an active scan which
1276 * can occur if we send the scan abort before we
1277 * the microcode has notified us that a scan is
1278 * completed. */
1279 D_SCAN("SCAN_ABORT ret %d.\n", pkt->u.status);
1280 ret = -EIO;
1281 }
1282
1283 il_free_pages(il, cmd.reply_page);
1284 return ret;
1285}
1286
1287static void
1288il_complete_scan(struct il_priv *il, bool aborted)
1289{
1290 struct cfg80211_scan_info info = {
1291 .aborted = aborted,
1292 };
1293
1294 /* check if scan was requested from mac80211 */
1295 if (il->scan_request) {
1296 D_SCAN("Complete scan in mac80211\n");
1297 ieee80211_scan_completed(il->hw, &info);
1298 }
1299
1300 il->scan_vif = NULL;
1301 il->scan_request = NULL;
1302}
1303
1304void
1305il_force_scan_end(struct il_priv *il)
1306{
1307 lockdep_assert_held(&il->mutex);
1308
1309 if (!test_bit(S_SCANNING, &il->status)) {
1310 D_SCAN("Forcing scan end while not scanning\n");
1311 return;
1312 }
1313
1314 D_SCAN("Forcing scan end\n");
1315 clear_bit(S_SCANNING, &il->status);
1316 clear_bit(S_SCAN_HW, &il->status);
1317 clear_bit(S_SCAN_ABORTING, &il->status);
1318 il_complete_scan(il, true);
1319}
1320
1321static void
1322il_do_scan_abort(struct il_priv *il)
1323{
1324 int ret;
1325
1326 lockdep_assert_held(&il->mutex);
1327
1328 if (!test_bit(S_SCANNING, &il->status)) {
1329 D_SCAN("Not performing scan to abort\n");
1330 return;
1331 }
1332
1333 if (test_and_set_bit(S_SCAN_ABORTING, &il->status)) {
1334 D_SCAN("Scan abort in progress\n");
1335 return;
1336 }
1337
1338 ret = il_send_scan_abort(il);
1339 if (ret) {
1340 D_SCAN("Send scan abort failed %d\n", ret);
1341 il_force_scan_end(il);
1342 } else
1343 D_SCAN("Successfully send scan abort\n");
1344}
1345
1346/*
1347 * il_scan_cancel - Cancel any currently executing HW scan
1348 */
1349int
1350il_scan_cancel(struct il_priv *il)
1351{
1352 D_SCAN("Queuing abort scan\n");
1353 queue_work(il->workqueue, &il->abort_scan);
1354 return 0;
1355}
1356EXPORT_SYMBOL(il_scan_cancel);
1357
1358/*
1359 * il_scan_cancel_timeout - Cancel any currently executing HW scan
1360 * @ms: amount of time to wait (in milliseconds) for scan to abort
1361 *
1362 */
1363int
1364il_scan_cancel_timeout(struct il_priv *il, unsigned long ms)
1365{
1366 unsigned long timeout = jiffies + msecs_to_jiffies(ms);
1367
1368 lockdep_assert_held(&il->mutex);
1369
1370 D_SCAN("Scan cancel timeout\n");
1371
1372 il_do_scan_abort(il);
1373
1374 while (time_before_eq(jiffies, timeout)) {
1375 if (!test_bit(S_SCAN_HW, &il->status))
1376 break;
1377 msleep(20);
1378 }
1379
1380 return test_bit(S_SCAN_HW, &il->status);
1381}
1382EXPORT_SYMBOL(il_scan_cancel_timeout);
1383
1384/* Service response to C_SCAN (0x80) */
1385static void
1386il_hdl_scan(struct il_priv *il, struct il_rx_buf *rxb)
1387{
1388#ifdef CONFIG_IWLEGACY_DEBUG
1389 struct il_rx_pkt *pkt = rxb_addr(rxb);
1390 struct il_scanreq_notification *notif =
1391 (struct il_scanreq_notification *)pkt->u.raw;
1392
1393 D_SCAN("Scan request status = 0x%x\n", notif->status);
1394#endif
1395}
1396
1397/* Service N_SCAN_START (0x82) */
1398static void
1399il_hdl_scan_start(struct il_priv *il, struct il_rx_buf *rxb)
1400{
1401 struct il_rx_pkt *pkt = rxb_addr(rxb);
1402 struct il_scanstart_notification *notif =
1403 (struct il_scanstart_notification *)pkt->u.raw;
1404 il->scan_start_tsf = le32_to_cpu(notif->tsf_low);
1405 D_SCAN("Scan start: " "%d [802.11%s] "
1406 "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n", notif->channel,
1407 notif->band ? "bg" : "a", le32_to_cpu(notif->tsf_high),
1408 le32_to_cpu(notif->tsf_low), notif->status, notif->beacon_timer);
1409}
1410
1411/* Service N_SCAN_RESULTS (0x83) */
1412static void
1413il_hdl_scan_results(struct il_priv *il, struct il_rx_buf *rxb)
1414{
1415#ifdef CONFIG_IWLEGACY_DEBUG
1416 struct il_rx_pkt *pkt = rxb_addr(rxb);
1417 struct il_scanresults_notification *notif =
1418 (struct il_scanresults_notification *)pkt->u.raw;
1419
1420 D_SCAN("Scan ch.res: " "%d [802.11%s] " "(TSF: 0x%08X:%08X) - %d "
1421 "elapsed=%lu usec\n", notif->channel, notif->band ? "bg" : "a",
1422 le32_to_cpu(notif->tsf_high), le32_to_cpu(notif->tsf_low),
1423 le32_to_cpu(notif->stats[0]),
1424 le32_to_cpu(notif->tsf_low) - il->scan_start_tsf);
1425#endif
1426}
1427
1428/* Service N_SCAN_COMPLETE (0x84) */
1429static void
1430il_hdl_scan_complete(struct il_priv *il, struct il_rx_buf *rxb)
1431{
1432
1433 struct il_rx_pkt *pkt = rxb_addr(rxb);
1434 struct il_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
1435
1436 D_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
1437 scan_notif->scanned_channels, scan_notif->tsf_low,
1438 scan_notif->tsf_high, scan_notif->status);
1439
1440 /* The HW is no longer scanning */
1441 clear_bit(S_SCAN_HW, &il->status);
1442
1443 D_SCAN("Scan on %sGHz took %dms\n",
1444 (il->scan_band == NL80211_BAND_2GHZ) ? "2.4" : "5.2",
1445 jiffies_to_msecs(jiffies - il->scan_start));
1446
1447 queue_work(il->workqueue, &il->scan_completed);
1448}
1449
1450void
1451il_setup_rx_scan_handlers(struct il_priv *il)
1452{
1453 /* scan handlers */
1454 il->handlers[C_SCAN] = il_hdl_scan;
1455 il->handlers[N_SCAN_START] = il_hdl_scan_start;
1456 il->handlers[N_SCAN_RESULTS] = il_hdl_scan_results;
1457 il->handlers[N_SCAN_COMPLETE] = il_hdl_scan_complete;
1458}
1459EXPORT_SYMBOL(il_setup_rx_scan_handlers);
1460
1461u16
1462il_get_active_dwell_time(struct il_priv *il, enum nl80211_band band,
1463 u8 n_probes)
1464{
1465 if (band == NL80211_BAND_5GHZ)
1466 return IL_ACTIVE_DWELL_TIME_52 +
1467 IL_ACTIVE_DWELL_FACTOR_52GHZ * (n_probes + 1);
1468 else
1469 return IL_ACTIVE_DWELL_TIME_24 +
1470 IL_ACTIVE_DWELL_FACTOR_24GHZ * (n_probes + 1);
1471}
1472EXPORT_SYMBOL(il_get_active_dwell_time);
1473
1474u16
1475il_get_passive_dwell_time(struct il_priv *il, enum nl80211_band band,
1476 struct ieee80211_vif *vif)
1477{
1478 u16 value;
1479
1480 u16 passive =
1481 (band ==
1482 NL80211_BAND_2GHZ) ? IL_PASSIVE_DWELL_BASE +
1483 IL_PASSIVE_DWELL_TIME_24 : IL_PASSIVE_DWELL_BASE +
1484 IL_PASSIVE_DWELL_TIME_52;
1485
1486 if (il_is_any_associated(il)) {
1487 /*
1488 * If we're associated, we clamp the maximum passive
1489 * dwell time to be 98% of the smallest beacon interval
1490 * (minus 2 * channel tune time)
1491 */
1492 value = il->vif ? il->vif->bss_conf.beacon_int : 0;
1493 if (value > IL_PASSIVE_DWELL_BASE || !value)
1494 value = IL_PASSIVE_DWELL_BASE;
1495 value = (value * 98) / 100 - IL_CHANNEL_TUNE_TIME * 2;
1496 passive = min(value, passive);
1497 }
1498
1499 return passive;
1500}
1501EXPORT_SYMBOL(il_get_passive_dwell_time);
1502
1503void
1504il_init_scan_params(struct il_priv *il)
1505{
1506 u8 ant_idx = fls(il->hw_params.valid_tx_ant) - 1;
1507 if (!il->scan_tx_ant[NL80211_BAND_5GHZ])
1508 il->scan_tx_ant[NL80211_BAND_5GHZ] = ant_idx;
1509 if (!il->scan_tx_ant[NL80211_BAND_2GHZ])
1510 il->scan_tx_ant[NL80211_BAND_2GHZ] = ant_idx;
1511}
1512EXPORT_SYMBOL(il_init_scan_params);
1513
1514static int
1515il_scan_initiate(struct il_priv *il, struct ieee80211_vif *vif)
1516{
1517 int ret;
1518
1519 lockdep_assert_held(&il->mutex);
1520
1521 cancel_delayed_work(&il->scan_check);
1522
1523 if (!il_is_ready_rf(il)) {
1524 IL_WARN("Request scan called when driver not ready.\n");
1525 return -EIO;
1526 }
1527
1528 if (test_bit(S_SCAN_HW, &il->status)) {
1529 D_SCAN("Multiple concurrent scan requests in parallel.\n");
1530 return -EBUSY;
1531 }
1532
1533 if (test_bit(S_SCAN_ABORTING, &il->status)) {
1534 D_SCAN("Scan request while abort pending.\n");
1535 return -EBUSY;
1536 }
1537
1538 D_SCAN("Starting scan...\n");
1539
1540 set_bit(S_SCANNING, &il->status);
1541 il->scan_start = jiffies;
1542
1543 ret = il->ops->request_scan(il, vif);
1544 if (ret) {
1545 clear_bit(S_SCANNING, &il->status);
1546 return ret;
1547 }
1548
1549 queue_delayed_work(il->workqueue, &il->scan_check,
1550 IL_SCAN_CHECK_WATCHDOG);
1551
1552 return 0;
1553}
1554
1555int
1556il_mac_hw_scan(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1557 struct ieee80211_scan_request *hw_req)
1558{
1559 struct cfg80211_scan_request *req = &hw_req->req;
1560 struct il_priv *il = hw->priv;
1561 int ret;
1562
1563 if (req->n_channels == 0) {
1564 IL_ERR("Can not scan on no channels.\n");
1565 return -EINVAL;
1566 }
1567
1568 mutex_lock(&il->mutex);
1569 D_MAC80211("enter\n");
1570
1571 if (test_bit(S_SCANNING, &il->status)) {
1572 D_SCAN("Scan already in progress.\n");
1573 ret = -EAGAIN;
1574 goto out_unlock;
1575 }
1576
1577 /* mac80211 will only ask for one band at a time */
1578 il->scan_request = req;
1579 il->scan_vif = vif;
1580 il->scan_band = req->channels[0]->band;
1581
1582 ret = il_scan_initiate(il, vif);
1583
1584out_unlock:
1585 D_MAC80211("leave ret %d\n", ret);
1586 mutex_unlock(&il->mutex);
1587
1588 return ret;
1589}
1590EXPORT_SYMBOL(il_mac_hw_scan);
1591
1592static void
1593il_bg_scan_check(struct work_struct *data)
1594{
1595 struct il_priv *il =
1596 container_of(data, struct il_priv, scan_check.work);
1597
1598 D_SCAN("Scan check work\n");
1599
1600 /* Since we are here firmware does not finish scan and
1601 * most likely is in bad shape, so we don't bother to
1602 * send abort command, just force scan complete to mac80211 */
1603 mutex_lock(&il->mutex);
1604 il_force_scan_end(il);
1605 mutex_unlock(&il->mutex);
1606}
1607
1608/*
1609 * il_fill_probe_req - fill in all required fields and IE for probe request
1610 */
1611u16
1612il_fill_probe_req(struct il_priv *il, struct ieee80211_mgmt *frame,
1613 const u8 *ta, const u8 *ies, int ie_len, int left)
1614{
1615 int len = 0;
1616 u8 *pos = NULL;
1617
1618 /* Make sure there is enough space for the probe request,
1619 * two mandatory IEs and the data */
1620 left -= 24;
1621 if (left < 0)
1622 return 0;
1623
1624 frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1625 eth_broadcast_addr(frame->da);
1626 memcpy(frame->sa, ta, ETH_ALEN);
1627 eth_broadcast_addr(frame->bssid);
1628 frame->seq_ctrl = 0;
1629
1630 len += 24;
1631
1632 /* ...next IE... */
1633 pos = &frame->u.probe_req.variable[0];
1634
1635 /* fill in our indirect SSID IE */
1636 left -= 2;
1637 if (left < 0)
1638 return 0;
1639 *pos++ = WLAN_EID_SSID;
1640 *pos++ = 0;
1641
1642 len += 2;
1643
1644 if (WARN_ON(left < ie_len))
1645 return len;
1646
1647 if (ies && ie_len) {
1648 memcpy(pos, ies, ie_len);
1649 len += ie_len;
1650 }
1651
1652 return (u16) len;
1653}
1654EXPORT_SYMBOL(il_fill_probe_req);
1655
1656static void
1657il_bg_abort_scan(struct work_struct *work)
1658{
1659 struct il_priv *il = container_of(work, struct il_priv, abort_scan);
1660
1661 D_SCAN("Abort scan work\n");
1662
1663 /* We keep scan_check work queued in case when firmware will not
1664 * report back scan completed notification */
1665 mutex_lock(&il->mutex);
1666 il_scan_cancel_timeout(il, 200);
1667 mutex_unlock(&il->mutex);
1668}
1669
1670static void
1671il_bg_scan_completed(struct work_struct *work)
1672{
1673 struct il_priv *il = container_of(work, struct il_priv, scan_completed);
1674 bool aborted;
1675
1676 D_SCAN("Completed scan.\n");
1677
1678 cancel_delayed_work(&il->scan_check);
1679
1680 mutex_lock(&il->mutex);
1681
1682 aborted = test_and_clear_bit(S_SCAN_ABORTING, &il->status);
1683 if (aborted)
1684 D_SCAN("Aborted scan completed.\n");
1685
1686 if (!test_and_clear_bit(S_SCANNING, &il->status)) {
1687 D_SCAN("Scan already completed.\n");
1688 goto out_settings;
1689 }
1690
1691 il_complete_scan(il, aborted);
1692
1693out_settings:
1694 /* Can we still talk to firmware ? */
1695 if (!il_is_ready_rf(il))
1696 goto out;
1697
1698 /*
1699 * We do not commit power settings while scan is pending,
1700 * do it now if the settings changed.
1701 */
1702 il_power_set_mode(il, &il->power_data.sleep_cmd_next, false);
1703 il_set_tx_power(il, il->tx_power_next, false);
1704
1705 il->ops->post_scan(il);
1706
1707out:
1708 mutex_unlock(&il->mutex);
1709}
1710
1711void
1712il_setup_scan_deferred_work(struct il_priv *il)
1713{
1714 INIT_WORK(&il->scan_completed, il_bg_scan_completed);
1715 INIT_WORK(&il->abort_scan, il_bg_abort_scan);
1716 INIT_DELAYED_WORK(&il->scan_check, il_bg_scan_check);
1717}
1718EXPORT_SYMBOL(il_setup_scan_deferred_work);
1719
1720void
1721il_cancel_scan_deferred_work(struct il_priv *il)
1722{
1723 cancel_work_sync(&il->abort_scan);
1724 cancel_work_sync(&il->scan_completed);
1725
1726 if (cancel_delayed_work_sync(&il->scan_check)) {
1727 mutex_lock(&il->mutex);
1728 il_force_scan_end(il);
1729 mutex_unlock(&il->mutex);
1730 }
1731}
1732EXPORT_SYMBOL(il_cancel_scan_deferred_work);
1733
1734/* il->sta_lock must be held */
1735static void
1736il_sta_ucode_activate(struct il_priv *il, u8 sta_id)
1737{
1738
1739 if (!(il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE))
1740 IL_ERR("ACTIVATE a non DRIVER active station id %u addr %pM\n",
1741 sta_id, il->stations[sta_id].sta.sta.addr);
1742
1743 if (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE) {
1744 D_ASSOC("STA id %u addr %pM already present"
1745 " in uCode (according to driver)\n", sta_id,
1746 il->stations[sta_id].sta.sta.addr);
1747 } else {
1748 il->stations[sta_id].used |= IL_STA_UCODE_ACTIVE;
1749 D_ASSOC("Added STA id %u addr %pM to uCode\n", sta_id,
1750 il->stations[sta_id].sta.sta.addr);
1751 }
1752}
1753
1754static int
1755il_process_add_sta_resp(struct il_priv *il, struct il_addsta_cmd *addsta,
1756 struct il_rx_pkt *pkt, bool sync)
1757{
1758 u8 sta_id = addsta->sta.sta_id;
1759 unsigned long flags;
1760 int ret = -EIO;
1761
1762 if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
1763 IL_ERR("Bad return from C_ADD_STA (0x%08X)\n", pkt->hdr.flags);
1764 return ret;
1765 }
1766
1767 D_INFO("Processing response for adding station %u\n", sta_id);
1768
1769 spin_lock_irqsave(&il->sta_lock, flags);
1770
1771 switch (pkt->u.add_sta.status) {
1772 case ADD_STA_SUCCESS_MSK:
1773 D_INFO("C_ADD_STA PASSED\n");
1774 il_sta_ucode_activate(il, sta_id);
1775 ret = 0;
1776 break;
1777 case ADD_STA_NO_ROOM_IN_TBL:
1778 IL_ERR("Adding station %d failed, no room in table.\n", sta_id);
1779 break;
1780 case ADD_STA_NO_BLOCK_ACK_RESOURCE:
1781 IL_ERR("Adding station %d failed, no block ack resource.\n",
1782 sta_id);
1783 break;
1784 case ADD_STA_MODIFY_NON_EXIST_STA:
1785 IL_ERR("Attempting to modify non-existing station %d\n",
1786 sta_id);
1787 break;
1788 default:
1789 D_ASSOC("Received C_ADD_STA:(0x%08X)\n", pkt->u.add_sta.status);
1790 break;
1791 }
1792
1793 D_INFO("%s station id %u addr %pM\n",
1794 il->stations[sta_id].sta.mode ==
1795 STA_CONTROL_MODIFY_MSK ? "Modified" : "Added", sta_id,
1796 il->stations[sta_id].sta.sta.addr);
1797
1798 /*
1799 * XXX: The MAC address in the command buffer is often changed from
1800 * the original sent to the device. That is, the MAC address
1801 * written to the command buffer often is not the same MAC address
1802 * read from the command buffer when the command returns. This
1803 * issue has not yet been resolved and this debugging is left to
1804 * observe the problem.
1805 */
1806 D_INFO("%s station according to cmd buffer %pM\n",
1807 il->stations[sta_id].sta.mode ==
1808 STA_CONTROL_MODIFY_MSK ? "Modified" : "Added", addsta->sta.addr);
1809 spin_unlock_irqrestore(&il->sta_lock, flags);
1810
1811 return ret;
1812}
1813
1814static void
1815il_add_sta_callback(struct il_priv *il, struct il_device_cmd *cmd,
1816 struct il_rx_pkt *pkt)
1817{
1818 struct il_addsta_cmd *addsta = (struct il_addsta_cmd *)cmd->cmd.payload;
1819
1820 il_process_add_sta_resp(il, addsta, pkt, false);
1821
1822}
1823
1824int
1825il_send_add_sta(struct il_priv *il, struct il_addsta_cmd *sta, u8 flags)
1826{
1827 struct il_rx_pkt *pkt = NULL;
1828 int ret = 0;
1829 u8 data[sizeof(*sta)];
1830 struct il_host_cmd cmd = {
1831 .id = C_ADD_STA,
1832 .flags = flags,
1833 .data = data,
1834 };
1835 u8 sta_id __maybe_unused = sta->sta.sta_id;
1836
1837 D_INFO("Adding sta %u (%pM) %ssynchronously\n", sta_id, sta->sta.addr,
1838 flags & CMD_ASYNC ? "a" : "");
1839
1840 if (flags & CMD_ASYNC)
1841 cmd.callback = il_add_sta_callback;
1842 else {
1843 cmd.flags |= CMD_WANT_SKB;
1844 might_sleep();
1845 }
1846
1847 cmd.len = il->ops->build_addsta_hcmd(sta, data);
1848 ret = il_send_cmd(il, &cmd);
1849 if (ret)
1850 return ret;
1851 if (flags & CMD_ASYNC)
1852 return 0;
1853
1854 pkt = (struct il_rx_pkt *)cmd.reply_page;
1855 ret = il_process_add_sta_resp(il, sta, pkt, true);
1856
1857 il_free_pages(il, cmd.reply_page);
1858
1859 return ret;
1860}
1861EXPORT_SYMBOL(il_send_add_sta);
1862
1863static void
1864il_set_ht_add_station(struct il_priv *il, u8 idx, struct ieee80211_sta *sta)
1865{
1866 struct ieee80211_sta_ht_cap *sta_ht_inf = &sta->ht_cap;
1867 __le32 sta_flags;
1868
1869 if (!sta || !sta_ht_inf->ht_supported)
1870 goto done;
1871
1872 D_ASSOC("spatial multiplexing power save mode: %s\n",
1873 (sta->smps_mode == IEEE80211_SMPS_STATIC) ? "static" :
1874 (sta->smps_mode == IEEE80211_SMPS_DYNAMIC) ? "dynamic" :
1875 "disabled");
1876
1877 sta_flags = il->stations[idx].sta.station_flags;
1878
1879 sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
1880
1881 switch (sta->smps_mode) {
1882 case IEEE80211_SMPS_STATIC:
1883 sta_flags |= STA_FLG_MIMO_DIS_MSK;
1884 break;
1885 case IEEE80211_SMPS_DYNAMIC:
1886 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
1887 break;
1888 case IEEE80211_SMPS_OFF:
1889 break;
1890 default:
1891 IL_WARN("Invalid MIMO PS mode %d\n", sta->smps_mode);
1892 break;
1893 }
1894
1895 sta_flags |=
1896 cpu_to_le32((u32) sta_ht_inf->
1897 ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
1898
1899 sta_flags |=
1900 cpu_to_le32((u32) sta_ht_inf->
1901 ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
1902
1903 if (il_is_ht40_tx_allowed(il, &sta->ht_cap))
1904 sta_flags |= STA_FLG_HT40_EN_MSK;
1905 else
1906 sta_flags &= ~STA_FLG_HT40_EN_MSK;
1907
1908 il->stations[idx].sta.station_flags = sta_flags;
1909done:
1910 return;
1911}
1912
1913/*
1914 * il_prep_station - Prepare station information for addition
1915 *
1916 * should be called with sta_lock held
1917 */
1918u8
1919il_prep_station(struct il_priv *il, const u8 *addr, bool is_ap,
1920 struct ieee80211_sta *sta)
1921{
1922 struct il_station_entry *station;
1923 int i;
1924 u8 sta_id = IL_INVALID_STATION;
1925 u16 rate;
1926
1927 if (is_ap)
1928 sta_id = IL_AP_ID;
1929 else if (is_broadcast_ether_addr(addr))
1930 sta_id = il->hw_params.bcast_id;
1931 else
1932 for (i = IL_STA_ID; i < il->hw_params.max_stations; i++) {
1933 if (ether_addr_equal(il->stations[i].sta.sta.addr,
1934 addr)) {
1935 sta_id = i;
1936 break;
1937 }
1938
1939 if (!il->stations[i].used &&
1940 sta_id == IL_INVALID_STATION)
1941 sta_id = i;
1942 }
1943
1944 /*
1945 * These two conditions have the same outcome, but keep them
1946 * separate
1947 */
1948 if (unlikely(sta_id == IL_INVALID_STATION))
1949 return sta_id;
1950
1951 /*
1952 * uCode is not able to deal with multiple requests to add a
1953 * station. Keep track if one is in progress so that we do not send
1954 * another.
1955 */
1956 if (il->stations[sta_id].used & IL_STA_UCODE_INPROGRESS) {
1957 D_INFO("STA %d already in process of being added.\n", sta_id);
1958 return sta_id;
1959 }
1960
1961 if ((il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE) &&
1962 (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE) &&
1963 ether_addr_equal(il->stations[sta_id].sta.sta.addr, addr)) {
1964 D_ASSOC("STA %d (%pM) already added, not adding again.\n",
1965 sta_id, addr);
1966 return sta_id;
1967 }
1968
1969 station = &il->stations[sta_id];
1970 station->used = IL_STA_DRIVER_ACTIVE;
1971 D_ASSOC("Add STA to driver ID %d: %pM\n", sta_id, addr);
1972 il->num_stations++;
1973
1974 /* Set up the C_ADD_STA command to send to device */
1975 memset(&station->sta, 0, sizeof(struct il_addsta_cmd));
1976 memcpy(station->sta.sta.addr, addr, ETH_ALEN);
1977 station->sta.mode = 0;
1978 station->sta.sta.sta_id = sta_id;
1979 station->sta.station_flags = 0;
1980
1981 /*
1982 * OK to call unconditionally, since local stations (IBSS BSSID
1983 * STA and broadcast STA) pass in a NULL sta, and mac80211
1984 * doesn't allow HT IBSS.
1985 */
1986 il_set_ht_add_station(il, sta_id, sta);
1987
1988 /* 3945 only */
1989 rate = (il->band == NL80211_BAND_5GHZ) ? RATE_6M_PLCP : RATE_1M_PLCP;
1990 /* Turn on both antennas for the station... */
1991 station->sta.rate_n_flags = cpu_to_le16(rate | RATE_MCS_ANT_AB_MSK);
1992
1993 return sta_id;
1994
1995}
1996EXPORT_SYMBOL_GPL(il_prep_station);
1997
1998#define STA_WAIT_TIMEOUT (HZ/2)
1999
2000/*
2001 * il_add_station_common -
2002 */
2003int
2004il_add_station_common(struct il_priv *il, const u8 *addr, bool is_ap,
2005 struct ieee80211_sta *sta, u8 *sta_id_r)
2006{
2007 unsigned long flags_spin;
2008 int ret = 0;
2009 u8 sta_id;
2010 struct il_addsta_cmd sta_cmd;
2011
2012 *sta_id_r = 0;
2013 spin_lock_irqsave(&il->sta_lock, flags_spin);
2014 sta_id = il_prep_station(il, addr, is_ap, sta);
2015 if (sta_id == IL_INVALID_STATION) {
2016 IL_ERR("Unable to prepare station %pM for addition\n", addr);
2017 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2018 return -EINVAL;
2019 }
2020
2021 /*
2022 * uCode is not able to deal with multiple requests to add a
2023 * station. Keep track if one is in progress so that we do not send
2024 * another.
2025 */
2026 if (il->stations[sta_id].used & IL_STA_UCODE_INPROGRESS) {
2027 D_INFO("STA %d already in process of being added.\n", sta_id);
2028 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2029 return -EEXIST;
2030 }
2031
2032 if ((il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE) &&
2033 (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE)) {
2034 D_ASSOC("STA %d (%pM) already added, not adding again.\n",
2035 sta_id, addr);
2036 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2037 return -EEXIST;
2038 }
2039
2040 il->stations[sta_id].used |= IL_STA_UCODE_INPROGRESS;
2041 memcpy(&sta_cmd, &il->stations[sta_id].sta,
2042 sizeof(struct il_addsta_cmd));
2043 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2044
2045 /* Add station to device's station table */
2046 ret = il_send_add_sta(il, &sta_cmd, CMD_SYNC);
2047 if (ret) {
2048 spin_lock_irqsave(&il->sta_lock, flags_spin);
2049 IL_ERR("Adding station %pM failed.\n",
2050 il->stations[sta_id].sta.sta.addr);
2051 il->stations[sta_id].used &= ~IL_STA_DRIVER_ACTIVE;
2052 il->stations[sta_id].used &= ~IL_STA_UCODE_INPROGRESS;
2053 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2054 }
2055 *sta_id_r = sta_id;
2056 return ret;
2057}
2058EXPORT_SYMBOL(il_add_station_common);
2059
2060/*
2061 * il_sta_ucode_deactivate - deactivate ucode status for a station
2062 *
2063 * il->sta_lock must be held
2064 */
2065static void
2066il_sta_ucode_deactivate(struct il_priv *il, u8 sta_id)
2067{
2068 /* Ucode must be active and driver must be non active */
2069 if ((il->stations[sta_id].
2070 used & (IL_STA_UCODE_ACTIVE | IL_STA_DRIVER_ACTIVE)) !=
2071 IL_STA_UCODE_ACTIVE)
2072 IL_ERR("removed non active STA %u\n", sta_id);
2073
2074 il->stations[sta_id].used &= ~IL_STA_UCODE_ACTIVE;
2075
2076 memset(&il->stations[sta_id], 0, sizeof(struct il_station_entry));
2077 D_ASSOC("Removed STA %u\n", sta_id);
2078}
2079
2080static int
2081il_send_remove_station(struct il_priv *il, const u8 * addr, int sta_id,
2082 bool temporary)
2083{
2084 struct il_rx_pkt *pkt;
2085 int ret;
2086
2087 unsigned long flags_spin;
2088 struct il_rem_sta_cmd rm_sta_cmd;
2089
2090 struct il_host_cmd cmd = {
2091 .id = C_REM_STA,
2092 .len = sizeof(struct il_rem_sta_cmd),
2093 .flags = CMD_SYNC,
2094 .data = &rm_sta_cmd,
2095 };
2096
2097 memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
2098 rm_sta_cmd.num_sta = 1;
2099 memcpy(&rm_sta_cmd.addr, addr, ETH_ALEN);
2100
2101 cmd.flags |= CMD_WANT_SKB;
2102
2103 ret = il_send_cmd(il, &cmd);
2104
2105 if (ret)
2106 return ret;
2107
2108 pkt = (struct il_rx_pkt *)cmd.reply_page;
2109 if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
2110 IL_ERR("Bad return from C_REM_STA (0x%08X)\n", pkt->hdr.flags);
2111 ret = -EIO;
2112 }
2113
2114 if (!ret) {
2115 switch (pkt->u.rem_sta.status) {
2116 case REM_STA_SUCCESS_MSK:
2117 if (!temporary) {
2118 spin_lock_irqsave(&il->sta_lock, flags_spin);
2119 il_sta_ucode_deactivate(il, sta_id);
2120 spin_unlock_irqrestore(&il->sta_lock,
2121 flags_spin);
2122 }
2123 D_ASSOC("C_REM_STA PASSED\n");
2124 break;
2125 default:
2126 ret = -EIO;
2127 IL_ERR("C_REM_STA failed\n");
2128 break;
2129 }
2130 }
2131 il_free_pages(il, cmd.reply_page);
2132
2133 return ret;
2134}
2135
2136/*
2137 * il_remove_station - Remove driver's knowledge of station.
2138 */
2139int
2140il_remove_station(struct il_priv *il, const u8 sta_id, const u8 * addr)
2141{
2142 unsigned long flags;
2143
2144 if (!il_is_ready(il)) {
2145 D_INFO("Unable to remove station %pM, device not ready.\n",
2146 addr);
2147 /*
2148 * It is typical for stations to be removed when we are
2149 * going down. Return success since device will be down
2150 * soon anyway
2151 */
2152 return 0;
2153 }
2154
2155 D_ASSOC("Removing STA from driver:%d %pM\n", sta_id, addr);
2156
2157 if (WARN_ON(sta_id == IL_INVALID_STATION))
2158 return -EINVAL;
2159
2160 spin_lock_irqsave(&il->sta_lock, flags);
2161
2162 if (!(il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE)) {
2163 D_INFO("Removing %pM but non DRIVER active\n", addr);
2164 goto out_err;
2165 }
2166
2167 if (!(il->stations[sta_id].used & IL_STA_UCODE_ACTIVE)) {
2168 D_INFO("Removing %pM but non UCODE active\n", addr);
2169 goto out_err;
2170 }
2171
2172 if (il->stations[sta_id].used & IL_STA_LOCAL) {
2173 kfree(il->stations[sta_id].lq);
2174 il->stations[sta_id].lq = NULL;
2175 }
2176
2177 il->stations[sta_id].used &= ~IL_STA_DRIVER_ACTIVE;
2178
2179 il->num_stations--;
2180
2181 BUG_ON(il->num_stations < 0);
2182
2183 spin_unlock_irqrestore(&il->sta_lock, flags);
2184
2185 return il_send_remove_station(il, addr, sta_id, false);
2186out_err:
2187 spin_unlock_irqrestore(&il->sta_lock, flags);
2188 return -EINVAL;
2189}
2190EXPORT_SYMBOL_GPL(il_remove_station);
2191
2192/*
2193 * il_clear_ucode_stations - clear ucode station table bits
2194 *
2195 * This function clears all the bits in the driver indicating
2196 * which stations are active in the ucode. Call when something
2197 * other than explicit station management would cause this in
2198 * the ucode, e.g. unassociated RXON.
2199 */
2200void
2201il_clear_ucode_stations(struct il_priv *il)
2202{
2203 int i;
2204 unsigned long flags_spin;
2205 bool cleared = false;
2206
2207 D_INFO("Clearing ucode stations in driver\n");
2208
2209 spin_lock_irqsave(&il->sta_lock, flags_spin);
2210 for (i = 0; i < il->hw_params.max_stations; i++) {
2211 if (il->stations[i].used & IL_STA_UCODE_ACTIVE) {
2212 D_INFO("Clearing ucode active for station %d\n", i);
2213 il->stations[i].used &= ~IL_STA_UCODE_ACTIVE;
2214 cleared = true;
2215 }
2216 }
2217 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2218
2219 if (!cleared)
2220 D_INFO("No active stations found to be cleared\n");
2221}
2222EXPORT_SYMBOL(il_clear_ucode_stations);
2223
2224/*
2225 * il_restore_stations() - Restore driver known stations to device
2226 *
2227 * All stations considered active by driver, but not present in ucode, is
2228 * restored.
2229 *
2230 * Function sleeps.
2231 */
2232void
2233il_restore_stations(struct il_priv *il)
2234{
2235 struct il_addsta_cmd sta_cmd;
2236 struct il_link_quality_cmd lq;
2237 unsigned long flags_spin;
2238 int i;
2239 bool found = false;
2240 int ret;
2241 bool send_lq;
2242
2243 if (!il_is_ready(il)) {
2244 D_INFO("Not ready yet, not restoring any stations.\n");
2245 return;
2246 }
2247
2248 D_ASSOC("Restoring all known stations ... start.\n");
2249 spin_lock_irqsave(&il->sta_lock, flags_spin);
2250 for (i = 0; i < il->hw_params.max_stations; i++) {
2251 if ((il->stations[i].used & IL_STA_DRIVER_ACTIVE) &&
2252 !(il->stations[i].used & IL_STA_UCODE_ACTIVE)) {
2253 D_ASSOC("Restoring sta %pM\n",
2254 il->stations[i].sta.sta.addr);
2255 il->stations[i].sta.mode = 0;
2256 il->stations[i].used |= IL_STA_UCODE_INPROGRESS;
2257 found = true;
2258 }
2259 }
2260
2261 for (i = 0; i < il->hw_params.max_stations; i++) {
2262 if ((il->stations[i].used & IL_STA_UCODE_INPROGRESS)) {
2263 memcpy(&sta_cmd, &il->stations[i].sta,
2264 sizeof(struct il_addsta_cmd));
2265 send_lq = false;
2266 if (il->stations[i].lq) {
2267 memcpy(&lq, il->stations[i].lq,
2268 sizeof(struct il_link_quality_cmd));
2269 send_lq = true;
2270 }
2271 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2272 ret = il_send_add_sta(il, &sta_cmd, CMD_SYNC);
2273 if (ret) {
2274 spin_lock_irqsave(&il->sta_lock, flags_spin);
2275 IL_ERR("Adding station %pM failed.\n",
2276 il->stations[i].sta.sta.addr);
2277 il->stations[i].used &= ~IL_STA_DRIVER_ACTIVE;
2278 il->stations[i].used &=
2279 ~IL_STA_UCODE_INPROGRESS;
2280 spin_unlock_irqrestore(&il->sta_lock,
2281 flags_spin);
2282 }
2283 /*
2284 * Rate scaling has already been initialized, send
2285 * current LQ command
2286 */
2287 if (send_lq)
2288 il_send_lq_cmd(il, &lq, CMD_SYNC, true);
2289 spin_lock_irqsave(&il->sta_lock, flags_spin);
2290 il->stations[i].used &= ~IL_STA_UCODE_INPROGRESS;
2291 }
2292 }
2293
2294 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2295 if (!found)
2296 D_INFO("Restoring all known stations"
2297 " .... no stations to be restored.\n");
2298 else
2299 D_INFO("Restoring all known stations" " .... complete.\n");
2300}
2301EXPORT_SYMBOL(il_restore_stations);
2302
2303int
2304il_get_free_ucode_key_idx(struct il_priv *il)
2305{
2306 int i;
2307
2308 for (i = 0; i < il->sta_key_max_num; i++)
2309 if (!test_and_set_bit(i, &il->ucode_key_table))
2310 return i;
2311
2312 return WEP_INVALID_OFFSET;
2313}
2314EXPORT_SYMBOL(il_get_free_ucode_key_idx);
2315
2316void
2317il_dealloc_bcast_stations(struct il_priv *il)
2318{
2319 unsigned long flags;
2320 int i;
2321
2322 spin_lock_irqsave(&il->sta_lock, flags);
2323 for (i = 0; i < il->hw_params.max_stations; i++) {
2324 if (!(il->stations[i].used & IL_STA_BCAST))
2325 continue;
2326
2327 il->stations[i].used &= ~IL_STA_UCODE_ACTIVE;
2328 il->num_stations--;
2329 BUG_ON(il->num_stations < 0);
2330 kfree(il->stations[i].lq);
2331 il->stations[i].lq = NULL;
2332 }
2333 spin_unlock_irqrestore(&il->sta_lock, flags);
2334}
2335EXPORT_SYMBOL_GPL(il_dealloc_bcast_stations);
2336
2337#ifdef CONFIG_IWLEGACY_DEBUG
2338static void
2339il_dump_lq_cmd(struct il_priv *il, struct il_link_quality_cmd *lq)
2340{
2341 int i;
2342 D_RATE("lq station id 0x%x\n", lq->sta_id);
2343 D_RATE("lq ant 0x%X 0x%X\n", lq->general_params.single_stream_ant_msk,
2344 lq->general_params.dual_stream_ant_msk);
2345
2346 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
2347 D_RATE("lq idx %d 0x%X\n", i, lq->rs_table[i].rate_n_flags);
2348}
2349#else
2350static inline void
2351il_dump_lq_cmd(struct il_priv *il, struct il_link_quality_cmd *lq)
2352{
2353}
2354#endif
2355
2356/*
2357 * il_is_lq_table_valid() - Test one aspect of LQ cmd for validity
2358 *
2359 * It sometimes happens when a HT rate has been in use and we
2360 * loose connectivity with AP then mac80211 will first tell us that the
2361 * current channel is not HT anymore before removing the station. In such a
2362 * scenario the RXON flags will be updated to indicate we are not
2363 * communicating HT anymore, but the LQ command may still contain HT rates.
2364 * Test for this to prevent driver from sending LQ command between the time
2365 * RXON flags are updated and when LQ command is updated.
2366 */
2367static bool
2368il_is_lq_table_valid(struct il_priv *il, struct il_link_quality_cmd *lq)
2369{
2370 int i;
2371
2372 if (il->ht.enabled)
2373 return true;
2374
2375 D_INFO("Channel %u is not an HT channel\n", il->active.channel);
2376 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
2377 if (le32_to_cpu(lq->rs_table[i].rate_n_flags) & RATE_MCS_HT_MSK) {
2378 D_INFO("idx %d of LQ expects HT channel\n", i);
2379 return false;
2380 }
2381 }
2382 return true;
2383}
2384
2385/*
2386 * il_send_lq_cmd() - Send link quality command
2387 * @init: This command is sent as part of station initialization right
2388 * after station has been added.
2389 *
2390 * The link quality command is sent as the last step of station creation.
2391 * This is the special case in which init is set and we call a callback in
2392 * this case to clear the state indicating that station creation is in
2393 * progress.
2394 */
2395int
2396il_send_lq_cmd(struct il_priv *il, struct il_link_quality_cmd *lq,
2397 u8 flags, bool init)
2398{
2399 int ret = 0;
2400 unsigned long flags_spin;
2401
2402 struct il_host_cmd cmd = {
2403 .id = C_TX_LINK_QUALITY_CMD,
2404 .len = sizeof(struct il_link_quality_cmd),
2405 .flags = flags,
2406 .data = lq,
2407 };
2408
2409 if (WARN_ON(lq->sta_id == IL_INVALID_STATION))
2410 return -EINVAL;
2411
2412 spin_lock_irqsave(&il->sta_lock, flags_spin);
2413 if (!(il->stations[lq->sta_id].used & IL_STA_DRIVER_ACTIVE)) {
2414 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2415 return -EINVAL;
2416 }
2417 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2418
2419 il_dump_lq_cmd(il, lq);
2420 BUG_ON(init && (cmd.flags & CMD_ASYNC));
2421
2422 if (il_is_lq_table_valid(il, lq))
2423 ret = il_send_cmd(il, &cmd);
2424 else
2425 ret = -EINVAL;
2426
2427 if (cmd.flags & CMD_ASYNC)
2428 return ret;
2429
2430 if (init) {
2431 D_INFO("init LQ command complete,"
2432 " clearing sta addition status for sta %d\n",
2433 lq->sta_id);
2434 spin_lock_irqsave(&il->sta_lock, flags_spin);
2435 il->stations[lq->sta_id].used &= ~IL_STA_UCODE_INPROGRESS;
2436 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2437 }
2438 return ret;
2439}
2440EXPORT_SYMBOL(il_send_lq_cmd);
2441
2442int
2443il_mac_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
2444 struct ieee80211_sta *sta)
2445{
2446 struct il_priv *il = hw->priv;
2447 struct il_station_priv_common *sta_common = (void *)sta->drv_priv;
2448 int ret;
2449
2450 mutex_lock(&il->mutex);
2451 D_MAC80211("enter station %pM\n", sta->addr);
2452
2453 ret = il_remove_station(il, sta_common->sta_id, sta->addr);
2454 if (ret)
2455 IL_ERR("Error removing station %pM\n", sta->addr);
2456
2457 D_MAC80211("leave ret %d\n", ret);
2458 mutex_unlock(&il->mutex);
2459
2460 return ret;
2461}
2462EXPORT_SYMBOL(il_mac_sta_remove);
2463
2464/************************** RX-FUNCTIONS ****************************/
2465/*
2466 * Rx theory of operation
2467 *
2468 * Driver allocates a circular buffer of Receive Buffer Descriptors (RBDs),
2469 * each of which point to Receive Buffers to be filled by the NIC. These get
2470 * used not only for Rx frames, but for any command response or notification
2471 * from the NIC. The driver and NIC manage the Rx buffers by means
2472 * of idxes into the circular buffer.
2473 *
2474 * Rx Queue Indexes
2475 * The host/firmware share two idx registers for managing the Rx buffers.
2476 *
2477 * The READ idx maps to the first position that the firmware may be writing
2478 * to -- the driver can read up to (but not including) this position and get
2479 * good data.
2480 * The READ idx is managed by the firmware once the card is enabled.
2481 *
2482 * The WRITE idx maps to the last position the driver has read from -- the
2483 * position preceding WRITE is the last slot the firmware can place a packet.
2484 *
2485 * The queue is empty (no good data) if WRITE = READ - 1, and is full if
2486 * WRITE = READ.
2487 *
2488 * During initialization, the host sets up the READ queue position to the first
2489 * IDX position, and WRITE to the last (READ - 1 wrapped)
2490 *
2491 * When the firmware places a packet in a buffer, it will advance the READ idx
2492 * and fire the RX interrupt. The driver can then query the READ idx and
2493 * process as many packets as possible, moving the WRITE idx forward as it
2494 * resets the Rx queue buffers with new memory.
2495 *
2496 * The management in the driver is as follows:
2497 * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free. When
2498 * iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
2499 * to replenish the iwl->rxq->rx_free.
2500 * + In il_rx_replenish (scheduled) if 'processed' != 'read' then the
2501 * iwl->rxq is replenished and the READ IDX is updated (updating the
2502 * 'processed' and 'read' driver idxes as well)
2503 * + A received packet is processed and handed to the kernel network stack,
2504 * detached from the iwl->rxq. The driver 'processed' idx is updated.
2505 * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
2506 * list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
2507 * IDX is not incremented and iwl->status(RX_STALLED) is set. If there
2508 * were enough free buffers and RX_STALLED is set it is cleared.
2509 *
2510 *
2511 * Driver sequence:
2512 *
2513 * il_rx_queue_alloc() Allocates rx_free
2514 * il_rx_replenish() Replenishes rx_free list from rx_used, and calls
2515 * il_rx_queue_restock
2516 * il_rx_queue_restock() Moves available buffers from rx_free into Rx
2517 * queue, updates firmware pointers, and updates
2518 * the WRITE idx. If insufficient rx_free buffers
2519 * are available, schedules il_rx_replenish
2520 *
2521 * -- enable interrupts --
2522 * ISR - il_rx() Detach il_rx_bufs from pool up to the
2523 * READ IDX, detaching the SKB from the pool.
2524 * Moves the packet buffer from queue to rx_used.
2525 * Calls il_rx_queue_restock to refill any empty
2526 * slots.
2527 * ...
2528 *
2529 */
2530
2531/*
2532 * il_rx_queue_space - Return number of free slots available in queue.
2533 */
2534int
2535il_rx_queue_space(const struct il_rx_queue *q)
2536{
2537 int s = q->read - q->write;
2538 if (s <= 0)
2539 s += RX_QUEUE_SIZE;
2540 /* keep some buffer to not confuse full and empty queue */
2541 s -= 2;
2542 if (s < 0)
2543 s = 0;
2544 return s;
2545}
2546EXPORT_SYMBOL(il_rx_queue_space);
2547
2548/*
2549 * il_rx_queue_update_write_ptr - Update the write pointer for the RX queue
2550 */
2551void
2552il_rx_queue_update_write_ptr(struct il_priv *il, struct il_rx_queue *q)
2553{
2554 unsigned long flags;
2555 u32 rx_wrt_ptr_reg = il->hw_params.rx_wrt_ptr_reg;
2556 u32 reg;
2557
2558 spin_lock_irqsave(&q->lock, flags);
2559
2560 if (q->need_update == 0)
2561 goto exit_unlock;
2562
2563 /* If power-saving is in use, make sure device is awake */
2564 if (test_bit(S_POWER_PMI, &il->status)) {
2565 reg = _il_rd(il, CSR_UCODE_DRV_GP1);
2566
2567 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
2568 D_INFO("Rx queue requesting wakeup," " GP1 = 0x%x\n",
2569 reg);
2570 il_set_bit(il, CSR_GP_CNTRL,
2571 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2572 goto exit_unlock;
2573 }
2574
2575 q->write_actual = (q->write & ~0x7);
2576 il_wr(il, rx_wrt_ptr_reg, q->write_actual);
2577
2578 /* Else device is assumed to be awake */
2579 } else {
2580 /* Device expects a multiple of 8 */
2581 q->write_actual = (q->write & ~0x7);
2582 il_wr(il, rx_wrt_ptr_reg, q->write_actual);
2583 }
2584
2585 q->need_update = 0;
2586
2587exit_unlock:
2588 spin_unlock_irqrestore(&q->lock, flags);
2589}
2590EXPORT_SYMBOL(il_rx_queue_update_write_ptr);
2591
2592int
2593il_rx_queue_alloc(struct il_priv *il)
2594{
2595 struct il_rx_queue *rxq = &il->rxq;
2596 struct device *dev = &il->pci_dev->dev;
2597 int i;
2598
2599 spin_lock_init(&rxq->lock);
2600 INIT_LIST_HEAD(&rxq->rx_free);
2601 INIT_LIST_HEAD(&rxq->rx_used);
2602
2603 /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
2604 rxq->bd = dma_alloc_coherent(dev, 4 * RX_QUEUE_SIZE, &rxq->bd_dma,
2605 GFP_KERNEL);
2606 if (!rxq->bd)
2607 goto err_bd;
2608
2609 rxq->rb_stts = dma_alloc_coherent(dev, sizeof(struct il_rb_status),
2610 &rxq->rb_stts_dma, GFP_KERNEL);
2611 if (!rxq->rb_stts)
2612 goto err_rb;
2613
2614 /* Fill the rx_used queue with _all_ of the Rx buffers */
2615 for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
2616 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
2617
2618 /* Set us so that we have processed and used all buffers, but have
2619 * not restocked the Rx queue with fresh buffers */
2620 rxq->read = rxq->write = 0;
2621 rxq->write_actual = 0;
2622 rxq->free_count = 0;
2623 rxq->need_update = 0;
2624 return 0;
2625
2626err_rb:
2627 dma_free_coherent(&il->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd,
2628 rxq->bd_dma);
2629err_bd:
2630 return -ENOMEM;
2631}
2632EXPORT_SYMBOL(il_rx_queue_alloc);
2633
2634void
2635il_hdl_spectrum_measurement(struct il_priv *il, struct il_rx_buf *rxb)
2636{
2637 struct il_rx_pkt *pkt = rxb_addr(rxb);
2638 struct il_spectrum_notification *report = &(pkt->u.spectrum_notif);
2639
2640 if (!report->state) {
2641 D_11H("Spectrum Measure Notification: Start\n");
2642 return;
2643 }
2644
2645 memcpy(&il->measure_report, report, sizeof(*report));
2646 il->measurement_status |= MEASUREMENT_READY;
2647}
2648EXPORT_SYMBOL(il_hdl_spectrum_measurement);
2649
2650/*
2651 * returns non-zero if packet should be dropped
2652 */
2653int
2654il_set_decrypted_flag(struct il_priv *il, struct ieee80211_hdr *hdr,
2655 u32 decrypt_res, struct ieee80211_rx_status *stats)
2656{
2657 u16 fc = le16_to_cpu(hdr->frame_control);
2658
2659 /*
2660 * All contexts have the same setting here due to it being
2661 * a module parameter, so OK to check any context.
2662 */
2663 if (il->active.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
2664 return 0;
2665
2666 if (!(fc & IEEE80211_FCTL_PROTECTED))
2667 return 0;
2668
2669 D_RX("decrypt_res:0x%x\n", decrypt_res);
2670 switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
2671 case RX_RES_STATUS_SEC_TYPE_TKIP:
2672 /* The uCode has got a bad phase 1 Key, pushes the packet.
2673 * Decryption will be done in SW. */
2674 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2675 RX_RES_STATUS_BAD_KEY_TTAK)
2676 break;
2677 fallthrough;
2678
2679 case RX_RES_STATUS_SEC_TYPE_WEP:
2680 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2681 RX_RES_STATUS_BAD_ICV_MIC) {
2682 /* bad ICV, the packet is destroyed since the
2683 * decryption is inplace, drop it */
2684 D_RX("Packet destroyed\n");
2685 return -1;
2686 }
2687 fallthrough;
2688 case RX_RES_STATUS_SEC_TYPE_CCMP:
2689 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2690 RX_RES_STATUS_DECRYPT_OK) {
2691 D_RX("hw decrypt successfully!!!\n");
2692 stats->flag |= RX_FLAG_DECRYPTED;
2693 }
2694 break;
2695
2696 default:
2697 break;
2698 }
2699 return 0;
2700}
2701EXPORT_SYMBOL(il_set_decrypted_flag);
2702
2703/*
2704 * il_txq_update_write_ptr - Send new write idx to hardware
2705 */
2706void
2707il_txq_update_write_ptr(struct il_priv *il, struct il_tx_queue *txq)
2708{
2709 u32 reg = 0;
2710 int txq_id = txq->q.id;
2711
2712 if (txq->need_update == 0)
2713 return;
2714
2715 /* if we're trying to save power */
2716 if (test_bit(S_POWER_PMI, &il->status)) {
2717 /* wake up nic if it's powered down ...
2718 * uCode will wake up, and interrupt us again, so next
2719 * time we'll skip this part. */
2720 reg = _il_rd(il, CSR_UCODE_DRV_GP1);
2721
2722 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
2723 D_INFO("Tx queue %d requesting wakeup," " GP1 = 0x%x\n",
2724 txq_id, reg);
2725 il_set_bit(il, CSR_GP_CNTRL,
2726 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2727 return;
2728 }
2729
2730 il_wr(il, HBUS_TARG_WRPTR, txq->q.write_ptr | (txq_id << 8));
2731
2732 /*
2733 * else not in power-save mode,
2734 * uCode will never sleep when we're
2735 * trying to tx (during RFKILL, we're not trying to tx).
2736 */
2737 } else
2738 _il_wr(il, HBUS_TARG_WRPTR, txq->q.write_ptr | (txq_id << 8));
2739 txq->need_update = 0;
2740}
2741EXPORT_SYMBOL(il_txq_update_write_ptr);
2742
2743/*
2744 * il_tx_queue_unmap - Unmap any remaining DMA mappings and free skb's
2745 */
2746void
2747il_tx_queue_unmap(struct il_priv *il, int txq_id)
2748{
2749 struct il_tx_queue *txq = &il->txq[txq_id];
2750 struct il_queue *q = &txq->q;
2751
2752 if (q->n_bd == 0)
2753 return;
2754
2755 while (q->write_ptr != q->read_ptr) {
2756 il->ops->txq_free_tfd(il, txq);
2757 q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd);
2758 }
2759}
2760EXPORT_SYMBOL(il_tx_queue_unmap);
2761
2762/*
2763 * il_tx_queue_free - Deallocate DMA queue.
2764 * @txq: Transmit queue to deallocate.
2765 *
2766 * Empty queue by removing and destroying all BD's.
2767 * Free all buffers.
2768 * 0-fill, but do not free "txq" descriptor structure.
2769 */
2770void
2771il_tx_queue_free(struct il_priv *il, int txq_id)
2772{
2773 struct il_tx_queue *txq = &il->txq[txq_id];
2774 struct device *dev = &il->pci_dev->dev;
2775 int i;
2776
2777 il_tx_queue_unmap(il, txq_id);
2778
2779 /* De-alloc array of command/tx buffers */
2780 if (txq->cmd) {
2781 for (i = 0; i < TFD_TX_CMD_SLOTS; i++)
2782 kfree(txq->cmd[i]);
2783 }
2784
2785 /* De-alloc circular buffer of TFDs */
2786 if (txq->q.n_bd)
2787 dma_free_coherent(dev, il->hw_params.tfd_size * txq->q.n_bd,
2788 txq->tfds, txq->q.dma_addr);
2789
2790 /* De-alloc array of per-TFD driver data */
2791 kfree(txq->skbs);
2792 txq->skbs = NULL;
2793
2794 /* deallocate arrays */
2795 kfree(txq->cmd);
2796 kfree(txq->meta);
2797 txq->cmd = NULL;
2798 txq->meta = NULL;
2799
2800 /* 0-fill queue descriptor structure */
2801 memset(txq, 0, sizeof(*txq));
2802}
2803EXPORT_SYMBOL(il_tx_queue_free);
2804
2805/*
2806 * il_cmd_queue_unmap - Unmap any remaining DMA mappings from command queue
2807 */
2808void
2809il_cmd_queue_unmap(struct il_priv *il)
2810{
2811 struct il_tx_queue *txq = &il->txq[il->cmd_queue];
2812 struct il_queue *q = &txq->q;
2813 int i;
2814
2815 if (q->n_bd == 0)
2816 return;
2817
2818 while (q->read_ptr != q->write_ptr) {
2819 i = il_get_cmd_idx(q, q->read_ptr, 0);
2820
2821 if (txq->meta[i].flags & CMD_MAPPED) {
2822 pci_unmap_single(il->pci_dev,
2823 dma_unmap_addr(&txq->meta[i], mapping),
2824 dma_unmap_len(&txq->meta[i], len),
2825 PCI_DMA_BIDIRECTIONAL);
2826 txq->meta[i].flags = 0;
2827 }
2828
2829 q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd);
2830 }
2831
2832 i = q->n_win;
2833 if (txq->meta[i].flags & CMD_MAPPED) {
2834 pci_unmap_single(il->pci_dev,
2835 dma_unmap_addr(&txq->meta[i], mapping),
2836 dma_unmap_len(&txq->meta[i], len),
2837 PCI_DMA_BIDIRECTIONAL);
2838 txq->meta[i].flags = 0;
2839 }
2840}
2841EXPORT_SYMBOL(il_cmd_queue_unmap);
2842
2843/*
2844 * il_cmd_queue_free - Deallocate DMA queue.
2845 *
2846 * Empty queue by removing and destroying all BD's.
2847 * Free all buffers.
2848 * 0-fill, but do not free "txq" descriptor structure.
2849 */
2850void
2851il_cmd_queue_free(struct il_priv *il)
2852{
2853 struct il_tx_queue *txq = &il->txq[il->cmd_queue];
2854 struct device *dev = &il->pci_dev->dev;
2855 int i;
2856
2857 il_cmd_queue_unmap(il);
2858
2859 /* De-alloc array of command/tx buffers */
2860 if (txq->cmd) {
2861 for (i = 0; i <= TFD_CMD_SLOTS; i++)
2862 kfree(txq->cmd[i]);
2863 }
2864
2865 /* De-alloc circular buffer of TFDs */
2866 if (txq->q.n_bd)
2867 dma_free_coherent(dev, il->hw_params.tfd_size * txq->q.n_bd,
2868 txq->tfds, txq->q.dma_addr);
2869
2870 /* deallocate arrays */
2871 kfree(txq->cmd);
2872 kfree(txq->meta);
2873 txq->cmd = NULL;
2874 txq->meta = NULL;
2875
2876 /* 0-fill queue descriptor structure */
2877 memset(txq, 0, sizeof(*txq));
2878}
2879EXPORT_SYMBOL(il_cmd_queue_free);
2880
2881/*************** DMA-QUEUE-GENERAL-FUNCTIONS *****
2882 * DMA services
2883 *
2884 * Theory of operation
2885 *
2886 * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer
2887 * of buffer descriptors, each of which points to one or more data buffers for
2888 * the device to read from or fill. Driver and device exchange status of each
2889 * queue via "read" and "write" pointers. Driver keeps minimum of 2 empty
2890 * entries in each circular buffer, to protect against confusing empty and full
2891 * queue states.
2892 *
2893 * The device reads or writes the data in the queues via the device's several
2894 * DMA/FIFO channels. Each queue is mapped to a single DMA channel.
2895 *
2896 * For Tx queue, there are low mark and high mark limits. If, after queuing
2897 * the packet for Tx, free space become < low mark, Tx queue stopped. When
2898 * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
2899 * Tx queue resumed.
2900 *
2901 * See more detailed info in 4965.h.
2902 ***************************************************/
2903
2904int
2905il_queue_space(const struct il_queue *q)
2906{
2907 int s = q->read_ptr - q->write_ptr;
2908
2909 if (q->read_ptr > q->write_ptr)
2910 s -= q->n_bd;
2911
2912 if (s <= 0)
2913 s += q->n_win;
2914 /* keep some reserve to not confuse empty and full situations */
2915 s -= 2;
2916 if (s < 0)
2917 s = 0;
2918 return s;
2919}
2920EXPORT_SYMBOL(il_queue_space);
2921
2922
2923/*
2924 * il_queue_init - Initialize queue's high/low-water and read/write idxes
2925 */
2926static int
2927il_queue_init(struct il_priv *il, struct il_queue *q, int slots, u32 id)
2928{
2929 /*
2930 * TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
2931 * il_queue_inc_wrap and il_queue_dec_wrap are broken.
2932 */
2933 BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
2934 /* FIXME: remove q->n_bd */
2935 q->n_bd = TFD_QUEUE_SIZE_MAX;
2936
2937 q->n_win = slots;
2938 q->id = id;
2939
2940 /* slots_must be power-of-two size, otherwise
2941 * il_get_cmd_idx is broken. */
2942 BUG_ON(!is_power_of_2(slots));
2943
2944 q->low_mark = q->n_win / 4;
2945 if (q->low_mark < 4)
2946 q->low_mark = 4;
2947
2948 q->high_mark = q->n_win / 8;
2949 if (q->high_mark < 2)
2950 q->high_mark = 2;
2951
2952 q->write_ptr = q->read_ptr = 0;
2953
2954 return 0;
2955}
2956
2957/*
2958 * il_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue
2959 */
2960static int
2961il_tx_queue_alloc(struct il_priv *il, struct il_tx_queue *txq, u32 id)
2962{
2963 struct device *dev = &il->pci_dev->dev;
2964 size_t tfd_sz = il->hw_params.tfd_size * TFD_QUEUE_SIZE_MAX;
2965
2966 /* Driver ilate data, only for Tx (not command) queues,
2967 * not shared with device. */
2968 if (id != il->cmd_queue) {
2969 txq->skbs = kcalloc(TFD_QUEUE_SIZE_MAX,
2970 sizeof(struct sk_buff *),
2971 GFP_KERNEL);
2972 if (!txq->skbs) {
2973 IL_ERR("Fail to alloc skbs\n");
2974 goto error;
2975 }
2976 } else
2977 txq->skbs = NULL;
2978
2979 /* Circular buffer of transmit frame descriptors (TFDs),
2980 * shared with device */
2981 txq->tfds =
2982 dma_alloc_coherent(dev, tfd_sz, &txq->q.dma_addr, GFP_KERNEL);
2983 if (!txq->tfds)
2984 goto error;
2985
2986 txq->q.id = id;
2987
2988 return 0;
2989
2990error:
2991 kfree(txq->skbs);
2992 txq->skbs = NULL;
2993
2994 return -ENOMEM;
2995}
2996
2997/*
2998 * il_tx_queue_init - Allocate and initialize one tx/cmd queue
2999 */
3000int
3001il_tx_queue_init(struct il_priv *il, u32 txq_id)
3002{
3003 int i, len, ret;
3004 int slots, actual_slots;
3005 struct il_tx_queue *txq = &il->txq[txq_id];
3006
3007 /*
3008 * Alloc buffer array for commands (Tx or other types of commands).
3009 * For the command queue (#4/#9), allocate command space + one big
3010 * command for scan, since scan command is very huge; the system will
3011 * not have two scans at the same time, so only one is needed.
3012 * For normal Tx queues (all other queues), no super-size command
3013 * space is needed.
3014 */
3015 if (txq_id == il->cmd_queue) {
3016 slots = TFD_CMD_SLOTS;
3017 actual_slots = slots + 1;
3018 } else {
3019 slots = TFD_TX_CMD_SLOTS;
3020 actual_slots = slots;
3021 }
3022
3023 txq->meta =
3024 kcalloc(actual_slots, sizeof(struct il_cmd_meta), GFP_KERNEL);
3025 txq->cmd =
3026 kcalloc(actual_slots, sizeof(struct il_device_cmd *), GFP_KERNEL);
3027
3028 if (!txq->meta || !txq->cmd)
3029 goto out_free_arrays;
3030
3031 len = sizeof(struct il_device_cmd);
3032 for (i = 0; i < actual_slots; i++) {
3033 /* only happens for cmd queue */
3034 if (i == slots)
3035 len = IL_MAX_CMD_SIZE;
3036
3037 txq->cmd[i] = kmalloc(len, GFP_KERNEL);
3038 if (!txq->cmd[i])
3039 goto err;
3040 }
3041
3042 /* Alloc driver data array and TFD circular buffer */
3043 ret = il_tx_queue_alloc(il, txq, txq_id);
3044 if (ret)
3045 goto err;
3046
3047 txq->need_update = 0;
3048
3049 /*
3050 * For the default queues 0-3, set up the swq_id
3051 * already -- all others need to get one later
3052 * (if they need one at all).
3053 */
3054 if (txq_id < 4)
3055 il_set_swq_id(txq, txq_id, txq_id);
3056
3057 /* Initialize queue's high/low-water marks, and head/tail idxes */
3058 il_queue_init(il, &txq->q, slots, txq_id);
3059
3060 /* Tell device where to find queue */
3061 il->ops->txq_init(il, txq);
3062
3063 return 0;
3064err:
3065 for (i = 0; i < actual_slots; i++)
3066 kfree(txq->cmd[i]);
3067out_free_arrays:
3068 kfree(txq->meta);
3069 txq->meta = NULL;
3070 kfree(txq->cmd);
3071 txq->cmd = NULL;
3072
3073 return -ENOMEM;
3074}
3075EXPORT_SYMBOL(il_tx_queue_init);
3076
3077void
3078il_tx_queue_reset(struct il_priv *il, u32 txq_id)
3079{
3080 int slots, actual_slots;
3081 struct il_tx_queue *txq = &il->txq[txq_id];
3082
3083 if (txq_id == il->cmd_queue) {
3084 slots = TFD_CMD_SLOTS;
3085 actual_slots = TFD_CMD_SLOTS + 1;
3086 } else {
3087 slots = TFD_TX_CMD_SLOTS;
3088 actual_slots = TFD_TX_CMD_SLOTS;
3089 }
3090
3091 memset(txq->meta, 0, sizeof(struct il_cmd_meta) * actual_slots);
3092 txq->need_update = 0;
3093
3094 /* Initialize queue's high/low-water marks, and head/tail idxes */
3095 il_queue_init(il, &txq->q, slots, txq_id);
3096
3097 /* Tell device where to find queue */
3098 il->ops->txq_init(il, txq);
3099}
3100EXPORT_SYMBOL(il_tx_queue_reset);
3101
3102/*************** HOST COMMAND QUEUE FUNCTIONS *****/
3103
3104/*
3105 * il_enqueue_hcmd - enqueue a uCode command
3106 * @il: device ilate data point
3107 * @cmd: a point to the ucode command structure
3108 *
3109 * The function returns < 0 values to indicate the operation is
3110 * failed. On success, it turns the idx (> 0) of command in the
3111 * command queue.
3112 */
3113int
3114il_enqueue_hcmd(struct il_priv *il, struct il_host_cmd *cmd)
3115{
3116 struct il_tx_queue *txq = &il->txq[il->cmd_queue];
3117 struct il_queue *q = &txq->q;
3118 struct il_device_cmd *out_cmd;
3119 struct il_cmd_meta *out_meta;
3120 dma_addr_t phys_addr;
3121 unsigned long flags;
3122 u32 idx;
3123 u16 fix_size;
3124
3125 cmd->len = il->ops->get_hcmd_size(cmd->id, cmd->len);
3126 fix_size = (u16) (cmd->len + sizeof(out_cmd->hdr));
3127
3128 /* If any of the command structures end up being larger than
3129 * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
3130 * we will need to increase the size of the TFD entries
3131 * Also, check to see if command buffer should not exceed the size
3132 * of device_cmd and max_cmd_size. */
3133 BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
3134 !(cmd->flags & CMD_SIZE_HUGE));
3135 BUG_ON(fix_size > IL_MAX_CMD_SIZE);
3136
3137 if (il_is_rfkill(il) || il_is_ctkill(il)) {
3138 IL_WARN("Not sending command - %s KILL\n",
3139 il_is_rfkill(il) ? "RF" : "CT");
3140 return -EIO;
3141 }
3142
3143 spin_lock_irqsave(&il->hcmd_lock, flags);
3144
3145 if (il_queue_space(q) < ((cmd->flags & CMD_ASYNC) ? 2 : 1)) {
3146 spin_unlock_irqrestore(&il->hcmd_lock, flags);
3147
3148 IL_ERR("Restarting adapter due to command queue full\n");
3149 queue_work(il->workqueue, &il->restart);
3150 return -ENOSPC;
3151 }
3152
3153 idx = il_get_cmd_idx(q, q->write_ptr, cmd->flags & CMD_SIZE_HUGE);
3154 out_cmd = txq->cmd[idx];
3155 out_meta = &txq->meta[idx];
3156
3157 if (WARN_ON(out_meta->flags & CMD_MAPPED)) {
3158 spin_unlock_irqrestore(&il->hcmd_lock, flags);
3159 return -ENOSPC;
3160 }
3161
3162 memset(out_meta, 0, sizeof(*out_meta)); /* re-initialize to NULL */
3163 out_meta->flags = cmd->flags | CMD_MAPPED;
3164 if (cmd->flags & CMD_WANT_SKB)
3165 out_meta->source = cmd;
3166 if (cmd->flags & CMD_ASYNC)
3167 out_meta->callback = cmd->callback;
3168
3169 out_cmd->hdr.cmd = cmd->id;
3170 memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
3171
3172 /* At this point, the out_cmd now has all of the incoming cmd
3173 * information */
3174
3175 out_cmd->hdr.flags = 0;
3176 out_cmd->hdr.sequence =
3177 cpu_to_le16(QUEUE_TO_SEQ(il->cmd_queue) | IDX_TO_SEQ(q->write_ptr));
3178 if (cmd->flags & CMD_SIZE_HUGE)
3179 out_cmd->hdr.sequence |= SEQ_HUGE_FRAME;
3180
3181#ifdef CONFIG_IWLEGACY_DEBUG
3182 switch (out_cmd->hdr.cmd) {
3183 case C_TX_LINK_QUALITY_CMD:
3184 case C_SENSITIVITY:
3185 D_HC_DUMP("Sending command %s (#%x), seq: 0x%04X, "
3186 "%d bytes at %d[%d]:%d\n",
3187 il_get_cmd_string(out_cmd->hdr.cmd), out_cmd->hdr.cmd,
3188 le16_to_cpu(out_cmd->hdr.sequence), fix_size,
3189 q->write_ptr, idx, il->cmd_queue);
3190 break;
3191 default:
3192 D_HC("Sending command %s (#%x), seq: 0x%04X, "
3193 "%d bytes at %d[%d]:%d\n",
3194 il_get_cmd_string(out_cmd->hdr.cmd), out_cmd->hdr.cmd,
3195 le16_to_cpu(out_cmd->hdr.sequence), fix_size, q->write_ptr,
3196 idx, il->cmd_queue);
3197 }
3198#endif
3199
3200 phys_addr =
3201 pci_map_single(il->pci_dev, &out_cmd->hdr, fix_size,
3202 PCI_DMA_BIDIRECTIONAL);
3203 if (unlikely(pci_dma_mapping_error(il->pci_dev, phys_addr))) {
3204 idx = -ENOMEM;
3205 goto out;
3206 }
3207 dma_unmap_addr_set(out_meta, mapping, phys_addr);
3208 dma_unmap_len_set(out_meta, len, fix_size);
3209
3210 txq->need_update = 1;
3211
3212 if (il->ops->txq_update_byte_cnt_tbl)
3213 /* Set up entry in queue's byte count circular buffer */
3214 il->ops->txq_update_byte_cnt_tbl(il, txq, 0);
3215
3216 il->ops->txq_attach_buf_to_tfd(il, txq, phys_addr, fix_size, 1,
3217 U32_PAD(cmd->len));
3218
3219 /* Increment and update queue's write idx */
3220 q->write_ptr = il_queue_inc_wrap(q->write_ptr, q->n_bd);
3221 il_txq_update_write_ptr(il, txq);
3222
3223out:
3224 spin_unlock_irqrestore(&il->hcmd_lock, flags);
3225 return idx;
3226}
3227
3228/*
3229 * il_hcmd_queue_reclaim - Reclaim TX command queue entries already Tx'd
3230 *
3231 * When FW advances 'R' idx, all entries between old and new 'R' idx
3232 * need to be reclaimed. As result, some free space forms. If there is
3233 * enough free space (> low mark), wake the stack that feeds us.
3234 */
3235static void
3236il_hcmd_queue_reclaim(struct il_priv *il, int txq_id, int idx, int cmd_idx)
3237{
3238 struct il_tx_queue *txq = &il->txq[txq_id];
3239 struct il_queue *q = &txq->q;
3240 int nfreed = 0;
3241
3242 if (idx >= q->n_bd || il_queue_used(q, idx) == 0) {
3243 IL_ERR("Read idx for DMA queue txq id (%d), idx %d, "
3244 "is out of range [0-%d] %d %d.\n", txq_id, idx, q->n_bd,
3245 q->write_ptr, q->read_ptr);
3246 return;
3247 }
3248
3249 for (idx = il_queue_inc_wrap(idx, q->n_bd); q->read_ptr != idx;
3250 q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd)) {
3251
3252 if (nfreed++ > 0) {
3253 IL_ERR("HCMD skipped: idx (%d) %d %d\n", idx,
3254 q->write_ptr, q->read_ptr);
3255 queue_work(il->workqueue, &il->restart);
3256 }
3257
3258 }
3259}
3260
3261/*
3262 * il_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3263 * @rxb: Rx buffer to reclaim
3264 *
3265 * If an Rx buffer has an async callback associated with it the callback
3266 * will be executed. The attached skb (if present) will only be freed
3267 * if the callback returns 1
3268 */
3269void
3270il_tx_cmd_complete(struct il_priv *il, struct il_rx_buf *rxb)
3271{
3272 struct il_rx_pkt *pkt = rxb_addr(rxb);
3273 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3274 int txq_id = SEQ_TO_QUEUE(sequence);
3275 int idx = SEQ_TO_IDX(sequence);
3276 int cmd_idx;
3277 bool huge = !!(pkt->hdr.sequence & SEQ_HUGE_FRAME);
3278 struct il_device_cmd *cmd;
3279 struct il_cmd_meta *meta;
3280 struct il_tx_queue *txq = &il->txq[il->cmd_queue];
3281 unsigned long flags;
3282
3283 /* If a Tx command is being handled and it isn't in the actual
3284 * command queue then there a command routing bug has been introduced
3285 * in the queue management code. */
3286 if (WARN
3287 (txq_id != il->cmd_queue,
3288 "wrong command queue %d (should be %d), sequence 0x%X readp=%d writep=%d\n",
3289 txq_id, il->cmd_queue, sequence, il->txq[il->cmd_queue].q.read_ptr,
3290 il->txq[il->cmd_queue].q.write_ptr)) {
3291 il_print_hex_error(il, pkt, 32);
3292 return;
3293 }
3294
3295 cmd_idx = il_get_cmd_idx(&txq->q, idx, huge);
3296 cmd = txq->cmd[cmd_idx];
3297 meta = &txq->meta[cmd_idx];
3298
3299 txq->time_stamp = jiffies;
3300
3301 pci_unmap_single(il->pci_dev, dma_unmap_addr(meta, mapping),
3302 dma_unmap_len(meta, len), PCI_DMA_BIDIRECTIONAL);
3303
3304 /* Input error checking is done when commands are added to queue. */
3305 if (meta->flags & CMD_WANT_SKB) {
3306 meta->source->reply_page = (unsigned long)rxb_addr(rxb);
3307 rxb->page = NULL;
3308 } else if (meta->callback)
3309 meta->callback(il, cmd, pkt);
3310
3311 spin_lock_irqsave(&il->hcmd_lock, flags);
3312
3313 il_hcmd_queue_reclaim(il, txq_id, idx, cmd_idx);
3314
3315 if (!(meta->flags & CMD_ASYNC)) {
3316 clear_bit(S_HCMD_ACTIVE, &il->status);
3317 D_INFO("Clearing HCMD_ACTIVE for command %s\n",
3318 il_get_cmd_string(cmd->hdr.cmd));
3319 wake_up(&il->wait_command_queue);
3320 }
3321
3322 /* Mark as unmapped */
3323 meta->flags = 0;
3324
3325 spin_unlock_irqrestore(&il->hcmd_lock, flags);
3326}
3327EXPORT_SYMBOL(il_tx_cmd_complete);
3328
3329MODULE_DESCRIPTION("iwl-legacy: common functions for 3945 and 4965");
3330MODULE_VERSION(IWLWIFI_VERSION);
3331MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
3332MODULE_LICENSE("GPL");
3333
3334/*
3335 * set bt_coex_active to true, uCode will do kill/defer
3336 * every time the priority line is asserted (BT is sending signals on the
3337 * priority line in the PCIx).
3338 * set bt_coex_active to false, uCode will ignore the BT activity and
3339 * perform the normal operation
3340 *
3341 * User might experience transmit issue on some platform due to WiFi/BT
3342 * co-exist problem. The possible behaviors are:
3343 * Able to scan and finding all the available AP
3344 * Not able to associate with any AP
3345 * On those platforms, WiFi communication can be restored by set
3346 * "bt_coex_active" module parameter to "false"
3347 *
3348 * default: bt_coex_active = true (BT_COEX_ENABLE)
3349 */
3350static bool bt_coex_active = true;
3351module_param(bt_coex_active, bool, 0444);
3352MODULE_PARM_DESC(bt_coex_active, "enable wifi/bluetooth co-exist");
3353
3354u32 il_debug_level;
3355EXPORT_SYMBOL(il_debug_level);
3356
3357const u8 il_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
3358EXPORT_SYMBOL(il_bcast_addr);
3359
3360#define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
3361#define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
3362static void
3363il_init_ht_hw_capab(const struct il_priv *il,
3364 struct ieee80211_sta_ht_cap *ht_info,
3365 enum nl80211_band band)
3366{
3367 u16 max_bit_rate = 0;
3368 u8 rx_chains_num = il->hw_params.rx_chains_num;
3369 u8 tx_chains_num = il->hw_params.tx_chains_num;
3370
3371 ht_info->cap = 0;
3372 memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
3373
3374 ht_info->ht_supported = true;
3375
3376 ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
3377 max_bit_rate = MAX_BIT_RATE_20_MHZ;
3378 if (il->hw_params.ht40_channel & BIT(band)) {
3379 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
3380 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
3381 ht_info->mcs.rx_mask[4] = 0x01;
3382 max_bit_rate = MAX_BIT_RATE_40_MHZ;
3383 }
3384
3385 if (il->cfg->mod_params->amsdu_size_8K)
3386 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
3387
3388 ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
3389 ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
3390
3391 ht_info->mcs.rx_mask[0] = 0xFF;
3392 if (rx_chains_num >= 2)
3393 ht_info->mcs.rx_mask[1] = 0xFF;
3394 if (rx_chains_num >= 3)
3395 ht_info->mcs.rx_mask[2] = 0xFF;
3396
3397 /* Highest supported Rx data rate */
3398 max_bit_rate *= rx_chains_num;
3399 WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
3400 ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
3401
3402 /* Tx MCS capabilities */
3403 ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
3404 if (tx_chains_num != rx_chains_num) {
3405 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
3406 ht_info->mcs.tx_params |=
3407 ((tx_chains_num -
3408 1) << IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
3409 }
3410}
3411
3412/*
3413 * il_init_geos - Initialize mac80211's geo/channel info based from eeprom
3414 */
3415int
3416il_init_geos(struct il_priv *il)
3417{
3418 struct il_channel_info *ch;
3419 struct ieee80211_supported_band *sband;
3420 struct ieee80211_channel *channels;
3421 struct ieee80211_channel *geo_ch;
3422 struct ieee80211_rate *rates;
3423 int i = 0;
3424 s8 max_tx_power = 0;
3425
3426 if (il->bands[NL80211_BAND_2GHZ].n_bitrates ||
3427 il->bands[NL80211_BAND_5GHZ].n_bitrates) {
3428 D_INFO("Geography modes already initialized.\n");
3429 set_bit(S_GEO_CONFIGURED, &il->status);
3430 return 0;
3431 }
3432
3433 channels =
3434 kcalloc(il->channel_count, sizeof(struct ieee80211_channel),
3435 GFP_KERNEL);
3436 if (!channels)
3437 return -ENOMEM;
3438
3439 rates =
3440 kzalloc((sizeof(struct ieee80211_rate) * RATE_COUNT_LEGACY),
3441 GFP_KERNEL);
3442 if (!rates) {
3443 kfree(channels);
3444 return -ENOMEM;
3445 }
3446
3447 /* 5.2GHz channels start after the 2.4GHz channels */
3448 sband = &il->bands[NL80211_BAND_5GHZ];
3449 sband->channels = &channels[ARRAY_SIZE(il_eeprom_band_1)];
3450 /* just OFDM */
3451 sband->bitrates = &rates[IL_FIRST_OFDM_RATE];
3452 sband->n_bitrates = RATE_COUNT_LEGACY - IL_FIRST_OFDM_RATE;
3453
3454 if (il->cfg->sku & IL_SKU_N)
3455 il_init_ht_hw_capab(il, &sband->ht_cap, NL80211_BAND_5GHZ);
3456
3457 sband = &il->bands[NL80211_BAND_2GHZ];
3458 sband->channels = channels;
3459 /* OFDM & CCK */
3460 sband->bitrates = rates;
3461 sband->n_bitrates = RATE_COUNT_LEGACY;
3462
3463 if (il->cfg->sku & IL_SKU_N)
3464 il_init_ht_hw_capab(il, &sband->ht_cap, NL80211_BAND_2GHZ);
3465
3466 il->ieee_channels = channels;
3467 il->ieee_rates = rates;
3468
3469 for (i = 0; i < il->channel_count; i++) {
3470 ch = &il->channel_info[i];
3471
3472 if (!il_is_channel_valid(ch))
3473 continue;
3474
3475 sband = &il->bands[ch->band];
3476
3477 geo_ch = &sband->channels[sband->n_channels++];
3478
3479 geo_ch->center_freq =
3480 ieee80211_channel_to_frequency(ch->channel, ch->band);
3481 geo_ch->max_power = ch->max_power_avg;
3482 geo_ch->max_antenna_gain = 0xff;
3483 geo_ch->hw_value = ch->channel;
3484
3485 if (il_is_channel_valid(ch)) {
3486 if (!(ch->flags & EEPROM_CHANNEL_IBSS))
3487 geo_ch->flags |= IEEE80211_CHAN_NO_IR;
3488
3489 if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
3490 geo_ch->flags |= IEEE80211_CHAN_NO_IR;
3491
3492 if (ch->flags & EEPROM_CHANNEL_RADAR)
3493 geo_ch->flags |= IEEE80211_CHAN_RADAR;
3494
3495 geo_ch->flags |= ch->ht40_extension_channel;
3496
3497 if (ch->max_power_avg > max_tx_power)
3498 max_tx_power = ch->max_power_avg;
3499 } else {
3500 geo_ch->flags |= IEEE80211_CHAN_DISABLED;
3501 }
3502
3503 D_INFO("Channel %d Freq=%d[%sGHz] %s flag=0x%X\n", ch->channel,
3504 geo_ch->center_freq,
3505 il_is_channel_a_band(ch) ? "5.2" : "2.4",
3506 geo_ch->
3507 flags & IEEE80211_CHAN_DISABLED ? "restricted" : "valid",
3508 geo_ch->flags);
3509 }
3510
3511 il->tx_power_device_lmt = max_tx_power;
3512 il->tx_power_user_lmt = max_tx_power;
3513 il->tx_power_next = max_tx_power;
3514
3515 if (il->bands[NL80211_BAND_5GHZ].n_channels == 0 &&
3516 (il->cfg->sku & IL_SKU_A)) {
3517 IL_INFO("Incorrectly detected BG card as ABG. "
3518 "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
3519 il->pci_dev->device, il->pci_dev->subsystem_device);
3520 il->cfg->sku &= ~IL_SKU_A;
3521 }
3522
3523 IL_INFO("Tunable channels: %d 802.11bg, %d 802.11a channels\n",
3524 il->bands[NL80211_BAND_2GHZ].n_channels,
3525 il->bands[NL80211_BAND_5GHZ].n_channels);
3526
3527 set_bit(S_GEO_CONFIGURED, &il->status);
3528
3529 return 0;
3530}
3531EXPORT_SYMBOL(il_init_geos);
3532
3533/*
3534 * il_free_geos - undo allocations in il_init_geos
3535 */
3536void
3537il_free_geos(struct il_priv *il)
3538{
3539 kfree(il->ieee_channels);
3540 kfree(il->ieee_rates);
3541 clear_bit(S_GEO_CONFIGURED, &il->status);
3542}
3543EXPORT_SYMBOL(il_free_geos);
3544
3545static bool
3546il_is_channel_extension(struct il_priv *il, enum nl80211_band band,
3547 u16 channel, u8 extension_chan_offset)
3548{
3549 const struct il_channel_info *ch_info;
3550
3551 ch_info = il_get_channel_info(il, band, channel);
3552 if (!il_is_channel_valid(ch_info))
3553 return false;
3554
3555 if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
3556 return !(ch_info->
3557 ht40_extension_channel & IEEE80211_CHAN_NO_HT40PLUS);
3558 else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
3559 return !(ch_info->
3560 ht40_extension_channel & IEEE80211_CHAN_NO_HT40MINUS);
3561
3562 return false;
3563}
3564
3565bool
3566il_is_ht40_tx_allowed(struct il_priv *il, struct ieee80211_sta_ht_cap *ht_cap)
3567{
3568 if (!il->ht.enabled || !il->ht.is_40mhz)
3569 return false;
3570
3571 /*
3572 * We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
3573 * the bit will not set if it is pure 40MHz case
3574 */
3575 if (ht_cap && !ht_cap->ht_supported)
3576 return false;
3577
3578#ifdef CONFIG_IWLEGACY_DEBUGFS
3579 if (il->disable_ht40)
3580 return false;
3581#endif
3582
3583 return il_is_channel_extension(il, il->band,
3584 le16_to_cpu(il->staging.channel),
3585 il->ht.extension_chan_offset);
3586}
3587EXPORT_SYMBOL(il_is_ht40_tx_allowed);
3588
3589static u16 noinline
3590il_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
3591{
3592 u16 new_val;
3593 u16 beacon_factor;
3594
3595 /*
3596 * If mac80211 hasn't given us a beacon interval, program
3597 * the default into the device.
3598 */
3599 if (!beacon_val)
3600 return DEFAULT_BEACON_INTERVAL;
3601
3602 /*
3603 * If the beacon interval we obtained from the peer
3604 * is too large, we'll have to wake up more often
3605 * (and in IBSS case, we'll beacon too much)
3606 *
3607 * For example, if max_beacon_val is 4096, and the
3608 * requested beacon interval is 7000, we'll have to
3609 * use 3500 to be able to wake up on the beacons.
3610 *
3611 * This could badly influence beacon detection stats.
3612 */
3613
3614 beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
3615 new_val = beacon_val / beacon_factor;
3616
3617 if (!new_val)
3618 new_val = max_beacon_val;
3619
3620 return new_val;
3621}
3622
3623int
3624il_send_rxon_timing(struct il_priv *il)
3625{
3626 u64 tsf;
3627 s32 interval_tm, rem;
3628 struct ieee80211_conf *conf = NULL;
3629 u16 beacon_int;
3630 struct ieee80211_vif *vif = il->vif;
3631
3632 conf = &il->hw->conf;
3633
3634 lockdep_assert_held(&il->mutex);
3635
3636 memset(&il->timing, 0, sizeof(struct il_rxon_time_cmd));
3637
3638 il->timing.timestamp = cpu_to_le64(il->timestamp);
3639 il->timing.listen_interval = cpu_to_le16(conf->listen_interval);
3640
3641 beacon_int = vif ? vif->bss_conf.beacon_int : 0;
3642
3643 /*
3644 * TODO: For IBSS we need to get atim_win from mac80211,
3645 * for now just always use 0
3646 */
3647 il->timing.atim_win = 0;
3648
3649 beacon_int =
3650 il_adjust_beacon_interval(beacon_int,
3651 il->hw_params.max_beacon_itrvl *
3652 TIME_UNIT);
3653 il->timing.beacon_interval = cpu_to_le16(beacon_int);
3654
3655 tsf = il->timestamp; /* tsf is modifed by do_div: copy it */
3656 interval_tm = beacon_int * TIME_UNIT;
3657 rem = do_div(tsf, interval_tm);
3658 il->timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
3659
3660 il->timing.dtim_period = vif ? (vif->bss_conf.dtim_period ? : 1) : 1;
3661
3662 D_ASSOC("beacon interval %d beacon timer %d beacon tim %d\n",
3663 le16_to_cpu(il->timing.beacon_interval),
3664 le32_to_cpu(il->timing.beacon_init_val),
3665 le16_to_cpu(il->timing.atim_win));
3666
3667 return il_send_cmd_pdu(il, C_RXON_TIMING, sizeof(il->timing),
3668 &il->timing);
3669}
3670EXPORT_SYMBOL(il_send_rxon_timing);
3671
3672void
3673il_set_rxon_hwcrypto(struct il_priv *il, int hw_decrypt)
3674{
3675 struct il_rxon_cmd *rxon = &il->staging;
3676
3677 if (hw_decrypt)
3678 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
3679 else
3680 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
3681
3682}
3683EXPORT_SYMBOL(il_set_rxon_hwcrypto);
3684
3685/* validate RXON structure is valid */
3686int
3687il_check_rxon_cmd(struct il_priv *il)
3688{
3689 struct il_rxon_cmd *rxon = &il->staging;
3690 bool error = false;
3691
3692 if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
3693 if (rxon->flags & RXON_FLG_TGJ_NARROW_BAND_MSK) {
3694 IL_WARN("check 2.4G: wrong narrow\n");
3695 error = true;
3696 }
3697 if (rxon->flags & RXON_FLG_RADAR_DETECT_MSK) {
3698 IL_WARN("check 2.4G: wrong radar\n");
3699 error = true;
3700 }
3701 } else {
3702 if (!(rxon->flags & RXON_FLG_SHORT_SLOT_MSK)) {
3703 IL_WARN("check 5.2G: not short slot!\n");
3704 error = true;
3705 }
3706 if (rxon->flags & RXON_FLG_CCK_MSK) {
3707 IL_WARN("check 5.2G: CCK!\n");
3708 error = true;
3709 }
3710 }
3711 if ((rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1) {
3712 IL_WARN("mac/bssid mcast!\n");
3713 error = true;
3714 }
3715
3716 /* make sure basic rates 6Mbps and 1Mbps are supported */
3717 if ((rxon->ofdm_basic_rates & RATE_6M_MASK) == 0 &&
3718 (rxon->cck_basic_rates & RATE_1M_MASK) == 0) {
3719 IL_WARN("neither 1 nor 6 are basic\n");
3720 error = true;
3721 }
3722
3723 if (le16_to_cpu(rxon->assoc_id) > 2007) {
3724 IL_WARN("aid > 2007\n");
3725 error = true;
3726 }
3727
3728 if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) ==
3729 (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) {
3730 IL_WARN("CCK and short slot\n");
3731 error = true;
3732 }
3733
3734 if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) ==
3735 (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) {
3736 IL_WARN("CCK and auto detect");
3737 error = true;
3738 }
3739
3740 if ((rxon->
3741 flags & (RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK)) ==
3742 RXON_FLG_TGG_PROTECT_MSK) {
3743 IL_WARN("TGg but no auto-detect\n");
3744 error = true;
3745 }
3746
3747 if (error)
3748 IL_WARN("Tuning to channel %d\n", le16_to_cpu(rxon->channel));
3749
3750 if (error) {
3751 IL_ERR("Invalid RXON\n");
3752 return -EINVAL;
3753 }
3754 return 0;
3755}
3756EXPORT_SYMBOL(il_check_rxon_cmd);
3757
3758/*
3759 * il_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
3760 * @il: staging_rxon is compared to active_rxon
3761 *
3762 * If the RXON structure is changing enough to require a new tune,
3763 * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
3764 * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
3765 */
3766int
3767il_full_rxon_required(struct il_priv *il)
3768{
3769 const struct il_rxon_cmd *staging = &il->staging;
3770 const struct il_rxon_cmd *active = &il->active;
3771
3772#define CHK(cond) \
3773 if ((cond)) { \
3774 D_INFO("need full RXON - " #cond "\n"); \
3775 return 1; \
3776 }
3777
3778#define CHK_NEQ(c1, c2) \
3779 if ((c1) != (c2)) { \
3780 D_INFO("need full RXON - " \
3781 #c1 " != " #c2 " - %d != %d\n", \
3782 (c1), (c2)); \
3783 return 1; \
3784 }
3785
3786 /* These items are only settable from the full RXON command */
3787 CHK(!il_is_associated(il));
3788 CHK(!ether_addr_equal_64bits(staging->bssid_addr, active->bssid_addr));
3789 CHK(!ether_addr_equal_64bits(staging->node_addr, active->node_addr));
3790 CHK(!ether_addr_equal_64bits(staging->wlap_bssid_addr,
3791 active->wlap_bssid_addr));
3792 CHK_NEQ(staging->dev_type, active->dev_type);
3793 CHK_NEQ(staging->channel, active->channel);
3794 CHK_NEQ(staging->air_propagation, active->air_propagation);
3795 CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates,
3796 active->ofdm_ht_single_stream_basic_rates);
3797 CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates,
3798 active->ofdm_ht_dual_stream_basic_rates);
3799 CHK_NEQ(staging->assoc_id, active->assoc_id);
3800
3801 /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
3802 * be updated with the RXON_ASSOC command -- however only some
3803 * flag transitions are allowed using RXON_ASSOC */
3804
3805 /* Check if we are not switching bands */
3806 CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK,
3807 active->flags & RXON_FLG_BAND_24G_MSK);
3808
3809 /* Check if we are switching association toggle */
3810 CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK,
3811 active->filter_flags & RXON_FILTER_ASSOC_MSK);
3812
3813#undef CHK
3814#undef CHK_NEQ
3815
3816 return 0;
3817}
3818EXPORT_SYMBOL(il_full_rxon_required);
3819
3820u8
3821il_get_lowest_plcp(struct il_priv *il)
3822{
3823 /*
3824 * Assign the lowest rate -- should really get this from
3825 * the beacon skb from mac80211.
3826 */
3827 if (il->staging.flags & RXON_FLG_BAND_24G_MSK)
3828 return RATE_1M_PLCP;
3829 else
3830 return RATE_6M_PLCP;
3831}
3832EXPORT_SYMBOL(il_get_lowest_plcp);
3833
3834static void
3835_il_set_rxon_ht(struct il_priv *il, struct il_ht_config *ht_conf)
3836{
3837 struct il_rxon_cmd *rxon = &il->staging;
3838
3839 if (!il->ht.enabled) {
3840 rxon->flags &=
3841 ~(RXON_FLG_CHANNEL_MODE_MSK |
3842 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK | RXON_FLG_HT40_PROT_MSK
3843 | RXON_FLG_HT_PROT_MSK);
3844 return;
3845 }
3846
3847 rxon->flags |=
3848 cpu_to_le32(il->ht.protection << RXON_FLG_HT_OPERATING_MODE_POS);
3849
3850 /* Set up channel bandwidth:
3851 * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
3852 /* clear the HT channel mode before set the mode */
3853 rxon->flags &=
3854 ~(RXON_FLG_CHANNEL_MODE_MSK | RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
3855 if (il_is_ht40_tx_allowed(il, NULL)) {
3856 /* pure ht40 */
3857 if (il->ht.protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
3858 rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
3859 /* Note: control channel is opposite of extension channel */
3860 switch (il->ht.extension_chan_offset) {
3861 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3862 rxon->flags &=
3863 ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
3864 break;
3865 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3866 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
3867 break;
3868 }
3869 } else {
3870 /* Note: control channel is opposite of extension channel */
3871 switch (il->ht.extension_chan_offset) {
3872 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3873 rxon->flags &=
3874 ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
3875 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
3876 break;
3877 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3878 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
3879 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
3880 break;
3881 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
3882 default:
3883 /* channel location only valid if in Mixed mode */
3884 IL_ERR("invalid extension channel offset\n");
3885 break;
3886 }
3887 }
3888 } else {
3889 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
3890 }
3891
3892 if (il->ops->set_rxon_chain)
3893 il->ops->set_rxon_chain(il);
3894
3895 D_ASSOC("rxon flags 0x%X operation mode :0x%X "
3896 "extension channel offset 0x%x\n", le32_to_cpu(rxon->flags),
3897 il->ht.protection, il->ht.extension_chan_offset);
3898}
3899
3900void
3901il_set_rxon_ht(struct il_priv *il, struct il_ht_config *ht_conf)
3902{
3903 _il_set_rxon_ht(il, ht_conf);
3904}
3905EXPORT_SYMBOL(il_set_rxon_ht);
3906
3907/* Return valid, unused, channel for a passive scan to reset the RF */
3908u8
3909il_get_single_channel_number(struct il_priv *il, enum nl80211_band band)
3910{
3911 const struct il_channel_info *ch_info;
3912 int i;
3913 u8 channel = 0;
3914 u8 min, max;
3915
3916 if (band == NL80211_BAND_5GHZ) {
3917 min = 14;
3918 max = il->channel_count;
3919 } else {
3920 min = 0;
3921 max = 14;
3922 }
3923
3924 for (i = min; i < max; i++) {
3925 channel = il->channel_info[i].channel;
3926 if (channel == le16_to_cpu(il->staging.channel))
3927 continue;
3928
3929 ch_info = il_get_channel_info(il, band, channel);
3930 if (il_is_channel_valid(ch_info))
3931 break;
3932 }
3933
3934 return channel;
3935}
3936EXPORT_SYMBOL(il_get_single_channel_number);
3937
3938/*
3939 * il_set_rxon_channel - Set the band and channel values in staging RXON
3940 * @ch: requested channel as a pointer to struct ieee80211_channel
3941
3942 * NOTE: Does not commit to the hardware; it sets appropriate bit fields
3943 * in the staging RXON flag structure based on the ch->band
3944 */
3945int
3946il_set_rxon_channel(struct il_priv *il, struct ieee80211_channel *ch)
3947{
3948 enum nl80211_band band = ch->band;
3949 u16 channel = ch->hw_value;
3950
3951 if (le16_to_cpu(il->staging.channel) == channel && il->band == band)
3952 return 0;
3953
3954 il->staging.channel = cpu_to_le16(channel);
3955 if (band == NL80211_BAND_5GHZ)
3956 il->staging.flags &= ~RXON_FLG_BAND_24G_MSK;
3957 else
3958 il->staging.flags |= RXON_FLG_BAND_24G_MSK;
3959
3960 il->band = band;
3961
3962 D_INFO("Staging channel set to %d [%d]\n", channel, band);
3963
3964 return 0;
3965}
3966EXPORT_SYMBOL(il_set_rxon_channel);
3967
3968void
3969il_set_flags_for_band(struct il_priv *il, enum nl80211_band band,
3970 struct ieee80211_vif *vif)
3971{
3972 if (band == NL80211_BAND_5GHZ) {
3973 il->staging.flags &=
3974 ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK |
3975 RXON_FLG_CCK_MSK);
3976 il->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
3977 } else {
3978 /* Copied from il_post_associate() */
3979 if (vif && vif->bss_conf.use_short_slot)
3980 il->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
3981 else
3982 il->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3983
3984 il->staging.flags |= RXON_FLG_BAND_24G_MSK;
3985 il->staging.flags |= RXON_FLG_AUTO_DETECT_MSK;
3986 il->staging.flags &= ~RXON_FLG_CCK_MSK;
3987 }
3988}
3989EXPORT_SYMBOL(il_set_flags_for_band);
3990
3991/*
3992 * initialize rxon structure with default values from eeprom
3993 */
3994void
3995il_connection_init_rx_config(struct il_priv *il)
3996{
3997 const struct il_channel_info *ch_info;
3998
3999 memset(&il->staging, 0, sizeof(il->staging));
4000
4001 switch (il->iw_mode) {
4002 case NL80211_IFTYPE_UNSPECIFIED:
4003 il->staging.dev_type = RXON_DEV_TYPE_ESS;
4004 break;
4005 case NL80211_IFTYPE_STATION:
4006 il->staging.dev_type = RXON_DEV_TYPE_ESS;
4007 il->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
4008 break;
4009 case NL80211_IFTYPE_ADHOC:
4010 il->staging.dev_type = RXON_DEV_TYPE_IBSS;
4011 il->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
4012 il->staging.filter_flags =
4013 RXON_FILTER_BCON_AWARE_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
4014 break;
4015 default:
4016 IL_ERR("Unsupported interface type %d\n", il->vif->type);
4017 return;
4018 }
4019
4020#if 0
4021 /* TODO: Figure out when short_preamble would be set and cache from
4022 * that */
4023 if (!hw_to_local(il->hw)->short_preamble)
4024 il->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
4025 else
4026 il->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
4027#endif
4028
4029 ch_info =
4030 il_get_channel_info(il, il->band, le16_to_cpu(il->active.channel));
4031
4032 if (!ch_info)
4033 ch_info = &il->channel_info[0];
4034
4035 il->staging.channel = cpu_to_le16(ch_info->channel);
4036 il->band = ch_info->band;
4037
4038 il_set_flags_for_band(il, il->band, il->vif);
4039
4040 il->staging.ofdm_basic_rates =
4041 (IL_OFDM_RATES_MASK >> IL_FIRST_OFDM_RATE) & 0xFF;
4042 il->staging.cck_basic_rates =
4043 (IL_CCK_RATES_MASK >> IL_FIRST_CCK_RATE) & 0xF;
4044
4045 /* clear both MIX and PURE40 mode flag */
4046 il->staging.flags &=
4047 ~(RXON_FLG_CHANNEL_MODE_MIXED | RXON_FLG_CHANNEL_MODE_PURE_40);
4048 if (il->vif)
4049 memcpy(il->staging.node_addr, il->vif->addr, ETH_ALEN);
4050
4051 il->staging.ofdm_ht_single_stream_basic_rates = 0xff;
4052 il->staging.ofdm_ht_dual_stream_basic_rates = 0xff;
4053}
4054EXPORT_SYMBOL(il_connection_init_rx_config);
4055
4056void
4057il_set_rate(struct il_priv *il)
4058{
4059 const struct ieee80211_supported_band *hw = NULL;
4060 struct ieee80211_rate *rate;
4061 int i;
4062
4063 hw = il_get_hw_mode(il, il->band);
4064 if (!hw) {
4065 IL_ERR("Failed to set rate: unable to get hw mode\n");
4066 return;
4067 }
4068
4069 il->active_rate = 0;
4070
4071 for (i = 0; i < hw->n_bitrates; i++) {
4072 rate = &(hw->bitrates[i]);
4073 if (rate->hw_value < RATE_COUNT_LEGACY)
4074 il->active_rate |= (1 << rate->hw_value);
4075 }
4076
4077 D_RATE("Set active_rate = %0x\n", il->active_rate);
4078
4079 il->staging.cck_basic_rates =
4080 (IL_CCK_BASIC_RATES_MASK >> IL_FIRST_CCK_RATE) & 0xF;
4081
4082 il->staging.ofdm_basic_rates =
4083 (IL_OFDM_BASIC_RATES_MASK >> IL_FIRST_OFDM_RATE) & 0xFF;
4084}
4085EXPORT_SYMBOL(il_set_rate);
4086
4087void
4088il_chswitch_done(struct il_priv *il, bool is_success)
4089{
4090 if (test_bit(S_EXIT_PENDING, &il->status))
4091 return;
4092
4093 if (test_and_clear_bit(S_CHANNEL_SWITCH_PENDING, &il->status))
4094 ieee80211_chswitch_done(il->vif, is_success);
4095}
4096EXPORT_SYMBOL(il_chswitch_done);
4097
4098void
4099il_hdl_csa(struct il_priv *il, struct il_rx_buf *rxb)
4100{
4101 struct il_rx_pkt *pkt = rxb_addr(rxb);
4102 struct il_csa_notification *csa = &(pkt->u.csa_notif);
4103 struct il_rxon_cmd *rxon = (void *)&il->active;
4104
4105 if (!test_bit(S_CHANNEL_SWITCH_PENDING, &il->status))
4106 return;
4107
4108 if (!le32_to_cpu(csa->status) && csa->channel == il->switch_channel) {
4109 rxon->channel = csa->channel;
4110 il->staging.channel = csa->channel;
4111 D_11H("CSA notif: channel %d\n", le16_to_cpu(csa->channel));
4112 il_chswitch_done(il, true);
4113 } else {
4114 IL_ERR("CSA notif (fail) : channel %d\n",
4115 le16_to_cpu(csa->channel));
4116 il_chswitch_done(il, false);
4117 }
4118}
4119EXPORT_SYMBOL(il_hdl_csa);
4120
4121#ifdef CONFIG_IWLEGACY_DEBUG
4122void
4123il_print_rx_config_cmd(struct il_priv *il)
4124{
4125 struct il_rxon_cmd *rxon = &il->staging;
4126
4127 D_RADIO("RX CONFIG:\n");
4128 il_print_hex_dump(il, IL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4129 D_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
4130 D_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4131 D_RADIO("u32 filter_flags: 0x%08x\n", le32_to_cpu(rxon->filter_flags));
4132 D_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4133 D_RADIO("u8 ofdm_basic_rates: 0x%02x\n", rxon->ofdm_basic_rates);
4134 D_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
4135 D_RADIO("u8[6] node_addr: %pM\n", rxon->node_addr);
4136 D_RADIO("u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
4137 D_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
4138}
4139EXPORT_SYMBOL(il_print_rx_config_cmd);
4140#endif
4141/*
4142 * il_irq_handle_error - called for HW or SW error interrupt from card
4143 */
4144void
4145il_irq_handle_error(struct il_priv *il)
4146{
4147 /* Set the FW error flag -- cleared on il_down */
4148 set_bit(S_FW_ERROR, &il->status);
4149
4150 /* Cancel currently queued command. */
4151 clear_bit(S_HCMD_ACTIVE, &il->status);
4152
4153 IL_ERR("Loaded firmware version: %s\n", il->hw->wiphy->fw_version);
4154
4155 il->ops->dump_nic_error_log(il);
4156 if (il->ops->dump_fh)
4157 il->ops->dump_fh(il, NULL, false);
4158#ifdef CONFIG_IWLEGACY_DEBUG
4159 if (il_get_debug_level(il) & IL_DL_FW_ERRORS)
4160 il_print_rx_config_cmd(il);
4161#endif
4162
4163 wake_up(&il->wait_command_queue);
4164
4165 /* Keep the restart process from trying to send host
4166 * commands by clearing the INIT status bit */
4167 clear_bit(S_READY, &il->status);
4168
4169 if (!test_bit(S_EXIT_PENDING, &il->status)) {
4170 IL_DBG(IL_DL_FW_ERRORS,
4171 "Restarting adapter due to uCode error.\n");
4172
4173 if (il->cfg->mod_params->restart_fw)
4174 queue_work(il->workqueue, &il->restart);
4175 }
4176}
4177EXPORT_SYMBOL(il_irq_handle_error);
4178
4179static int
4180_il_apm_stop_master(struct il_priv *il)
4181{
4182 int ret = 0;
4183
4184 /* stop device's busmaster DMA activity */
4185 _il_set_bit(il, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
4186
4187 ret =
4188 _il_poll_bit(il, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
4189 CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
4190 if (ret < 0)
4191 IL_WARN("Master Disable Timed Out, 100 usec\n");
4192
4193 D_INFO("stop master\n");
4194
4195 return ret;
4196}
4197
4198void
4199_il_apm_stop(struct il_priv *il)
4200{
4201 lockdep_assert_held(&il->reg_lock);
4202
4203 D_INFO("Stop card, put in low power state\n");
4204
4205 /* Stop device's DMA activity */
4206 _il_apm_stop_master(il);
4207
4208 /* Reset the entire device */
4209 _il_set_bit(il, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
4210
4211 udelay(10);
4212
4213 /*
4214 * Clear "initialization complete" bit to move adapter from
4215 * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
4216 */
4217 _il_clear_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
4218}
4219EXPORT_SYMBOL(_il_apm_stop);
4220
4221void
4222il_apm_stop(struct il_priv *il)
4223{
4224 unsigned long flags;
4225
4226 spin_lock_irqsave(&il->reg_lock, flags);
4227 _il_apm_stop(il);
4228 spin_unlock_irqrestore(&il->reg_lock, flags);
4229}
4230EXPORT_SYMBOL(il_apm_stop);
4231
4232/*
4233 * Start up NIC's basic functionality after it has been reset
4234 * (e.g. after platform boot, or shutdown via il_apm_stop())
4235 * NOTE: This does not load uCode nor start the embedded processor
4236 */
4237int
4238il_apm_init(struct il_priv *il)
4239{
4240 int ret = 0;
4241 u16 lctl;
4242
4243 D_INFO("Init card's basic functions\n");
4244
4245 /*
4246 * Use "set_bit" below rather than "write", to preserve any hardware
4247 * bits already set by default after reset.
4248 */
4249
4250 /* Disable L0S exit timer (platform NMI Work/Around) */
4251 il_set_bit(il, CSR_GIO_CHICKEN_BITS,
4252 CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
4253
4254 /*
4255 * Disable L0s without affecting L1;
4256 * don't wait for ICH L0s (ICH bug W/A)
4257 */
4258 il_set_bit(il, CSR_GIO_CHICKEN_BITS,
4259 CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
4260
4261 /* Set FH wait threshold to maximum (HW error during stress W/A) */
4262 il_set_bit(il, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
4263
4264 /*
4265 * Enable HAP INTA (interrupt from management bus) to
4266 * wake device's PCI Express link L1a -> L0s
4267 * NOTE: This is no-op for 3945 (non-existent bit)
4268 */
4269 il_set_bit(il, CSR_HW_IF_CONFIG_REG,
4270 CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
4271
4272 /*
4273 * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition.
4274 * Check if BIOS (or OS) enabled L1-ASPM on this device.
4275 * If so (likely), disable L0S, so device moves directly L0->L1;
4276 * costs negligible amount of power savings.
4277 * If not (unlikely), enable L0S, so there is at least some
4278 * power savings, even without L1.
4279 */
4280 if (il->cfg->set_l0s) {
4281 ret = pcie_capability_read_word(il->pci_dev, PCI_EXP_LNKCTL, &lctl);
4282 if (!ret && (lctl & PCI_EXP_LNKCTL_ASPM_L1)) {
4283 /* L1-ASPM enabled; disable(!) L0S */
4284 il_set_bit(il, CSR_GIO_REG,
4285 CSR_GIO_REG_VAL_L0S_ENABLED);
4286 D_POWER("L1 Enabled; Disabling L0S\n");
4287 } else {
4288 /* L1-ASPM disabled; enable(!) L0S */
4289 il_clear_bit(il, CSR_GIO_REG,
4290 CSR_GIO_REG_VAL_L0S_ENABLED);
4291 D_POWER("L1 Disabled; Enabling L0S\n");
4292 }
4293 }
4294
4295 /* Configure analog phase-lock-loop before activating to D0A */
4296 if (il->cfg->pll_cfg_val)
4297 il_set_bit(il, CSR_ANA_PLL_CFG,
4298 il->cfg->pll_cfg_val);
4299
4300 /*
4301 * Set "initialization complete" bit to move adapter from
4302 * D0U* --> D0A* (powered-up active) state.
4303 */
4304 il_set_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
4305
4306 /*
4307 * Wait for clock stabilization; once stabilized, access to
4308 * device-internal resources is supported, e.g. il_wr_prph()
4309 * and accesses to uCode SRAM.
4310 */
4311 ret =
4312 _il_poll_bit(il, CSR_GP_CNTRL,
4313 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
4314 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
4315 if (ret < 0) {
4316 D_INFO("Failed to init the card\n");
4317 goto out;
4318 }
4319
4320 /*
4321 * Enable DMA and BSM (if used) clocks, wait for them to stabilize.
4322 * BSM (Boostrap State Machine) is only in 3945 and 4965.
4323 *
4324 * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
4325 * do not disable clocks. This preserves any hardware bits already
4326 * set by default in "CLK_CTRL_REG" after reset.
4327 */
4328 if (il->cfg->use_bsm)
4329 il_wr_prph(il, APMG_CLK_EN_REG,
4330 APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
4331 else
4332 il_wr_prph(il, APMG_CLK_EN_REG, APMG_CLK_VAL_DMA_CLK_RQT);
4333 udelay(20);
4334
4335 /* Disable L1-Active */
4336 il_set_bits_prph(il, APMG_PCIDEV_STT_REG,
4337 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
4338
4339out:
4340 return ret;
4341}
4342EXPORT_SYMBOL(il_apm_init);
4343
4344int
4345il_set_tx_power(struct il_priv *il, s8 tx_power, bool force)
4346{
4347 int ret;
4348 s8 prev_tx_power;
4349 bool defer;
4350
4351 lockdep_assert_held(&il->mutex);
4352
4353 if (il->tx_power_user_lmt == tx_power && !force)
4354 return 0;
4355
4356 if (!il->ops->send_tx_power)
4357 return -EOPNOTSUPP;
4358
4359 /* 0 dBm mean 1 milliwatt */
4360 if (tx_power < 0) {
4361 IL_WARN("Requested user TXPOWER %d below 1 mW.\n", tx_power);
4362 return -EINVAL;
4363 }
4364
4365 if (tx_power > il->tx_power_device_lmt) {
4366 IL_WARN("Requested user TXPOWER %d above upper limit %d.\n",
4367 tx_power, il->tx_power_device_lmt);
4368 return -EINVAL;
4369 }
4370
4371 if (!il_is_ready_rf(il))
4372 return -EIO;
4373
4374 /* scan complete and commit_rxon use tx_power_next value,
4375 * it always need to be updated for newest request */
4376 il->tx_power_next = tx_power;
4377
4378 /* do not set tx power when scanning or channel changing */
4379 defer = test_bit(S_SCANNING, &il->status) ||
4380 memcmp(&il->active, &il->staging, sizeof(il->staging));
4381 if (defer && !force) {
4382 D_INFO("Deferring tx power set\n");
4383 return 0;
4384 }
4385
4386 prev_tx_power = il->tx_power_user_lmt;
4387 il->tx_power_user_lmt = tx_power;
4388
4389 ret = il->ops->send_tx_power(il);
4390
4391 /* if fail to set tx_power, restore the orig. tx power */
4392 if (ret) {
4393 il->tx_power_user_lmt = prev_tx_power;
4394 il->tx_power_next = prev_tx_power;
4395 }
4396 return ret;
4397}
4398EXPORT_SYMBOL(il_set_tx_power);
4399
4400void
4401il_send_bt_config(struct il_priv *il)
4402{
4403 struct il_bt_cmd bt_cmd = {
4404 .lead_time = BT_LEAD_TIME_DEF,
4405 .max_kill = BT_MAX_KILL_DEF,
4406 .kill_ack_mask = 0,
4407 .kill_cts_mask = 0,
4408 };
4409
4410 if (!bt_coex_active)
4411 bt_cmd.flags = BT_COEX_DISABLE;
4412 else
4413 bt_cmd.flags = BT_COEX_ENABLE;
4414
4415 D_INFO("BT coex %s\n",
4416 (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
4417
4418 if (il_send_cmd_pdu(il, C_BT_CONFIG, sizeof(struct il_bt_cmd), &bt_cmd))
4419 IL_ERR("failed to send BT Coex Config\n");
4420}
4421EXPORT_SYMBOL(il_send_bt_config);
4422
4423int
4424il_send_stats_request(struct il_priv *il, u8 flags, bool clear)
4425{
4426 struct il_stats_cmd stats_cmd = {
4427 .configuration_flags = clear ? IL_STATS_CONF_CLEAR_STATS : 0,
4428 };
4429
4430 if (flags & CMD_ASYNC)
4431 return il_send_cmd_pdu_async(il, C_STATS, sizeof(struct il_stats_cmd),
4432 &stats_cmd, NULL);
4433 else
4434 return il_send_cmd_pdu(il, C_STATS, sizeof(struct il_stats_cmd),
4435 &stats_cmd);
4436}
4437EXPORT_SYMBOL(il_send_stats_request);
4438
4439void
4440il_hdl_pm_sleep(struct il_priv *il, struct il_rx_buf *rxb)
4441{
4442#ifdef CONFIG_IWLEGACY_DEBUG
4443 struct il_rx_pkt *pkt = rxb_addr(rxb);
4444 struct il_sleep_notification *sleep = &(pkt->u.sleep_notif);
4445 D_RX("sleep mode: %d, src: %d\n",
4446 sleep->pm_sleep_mode, sleep->pm_wakeup_src);
4447#endif
4448}
4449EXPORT_SYMBOL(il_hdl_pm_sleep);
4450
4451void
4452il_hdl_pm_debug_stats(struct il_priv *il, struct il_rx_buf *rxb)
4453{
4454 struct il_rx_pkt *pkt = rxb_addr(rxb);
4455 u32 len = le32_to_cpu(pkt->len_n_flags) & IL_RX_FRAME_SIZE_MSK;
4456 D_RADIO("Dumping %d bytes of unhandled notification for %s:\n", len,
4457 il_get_cmd_string(pkt->hdr.cmd));
4458 il_print_hex_dump(il, IL_DL_RADIO, pkt->u.raw, len);
4459}
4460EXPORT_SYMBOL(il_hdl_pm_debug_stats);
4461
4462void
4463il_hdl_error(struct il_priv *il, struct il_rx_buf *rxb)
4464{
4465 struct il_rx_pkt *pkt = rxb_addr(rxb);
4466
4467 IL_ERR("Error Reply type 0x%08X cmd %s (0x%02X) "
4468 "seq 0x%04X ser 0x%08X\n",
4469 le32_to_cpu(pkt->u.err_resp.error_type),
4470 il_get_cmd_string(pkt->u.err_resp.cmd_id),
4471 pkt->u.err_resp.cmd_id,
4472 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
4473 le32_to_cpu(pkt->u.err_resp.error_info));
4474}
4475EXPORT_SYMBOL(il_hdl_error);
4476
4477void
4478il_clear_isr_stats(struct il_priv *il)
4479{
4480 memset(&il->isr_stats, 0, sizeof(il->isr_stats));
4481}
4482
4483int
4484il_mac_conf_tx(struct ieee80211_hw *hw, struct ieee80211_vif *vif, u16 queue,
4485 const struct ieee80211_tx_queue_params *params)
4486{
4487 struct il_priv *il = hw->priv;
4488 unsigned long flags;
4489 int q;
4490
4491 D_MAC80211("enter\n");
4492
4493 if (!il_is_ready_rf(il)) {
4494 D_MAC80211("leave - RF not ready\n");
4495 return -EIO;
4496 }
4497
4498 if (queue >= AC_NUM) {
4499 D_MAC80211("leave - queue >= AC_NUM %d\n", queue);
4500 return 0;
4501 }
4502
4503 q = AC_NUM - 1 - queue;
4504
4505 spin_lock_irqsave(&il->lock, flags);
4506
4507 il->qos_data.def_qos_parm.ac[q].cw_min =
4508 cpu_to_le16(params->cw_min);
4509 il->qos_data.def_qos_parm.ac[q].cw_max =
4510 cpu_to_le16(params->cw_max);
4511 il->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
4512 il->qos_data.def_qos_parm.ac[q].edca_txop =
4513 cpu_to_le16((params->txop * 32));
4514
4515 il->qos_data.def_qos_parm.ac[q].reserved1 = 0;
4516
4517 spin_unlock_irqrestore(&il->lock, flags);
4518
4519 D_MAC80211("leave\n");
4520 return 0;
4521}
4522EXPORT_SYMBOL(il_mac_conf_tx);
4523
4524int
4525il_mac_tx_last_beacon(struct ieee80211_hw *hw)
4526{
4527 struct il_priv *il = hw->priv;
4528 int ret;
4529
4530 D_MAC80211("enter\n");
4531
4532 ret = (il->ibss_manager == IL_IBSS_MANAGER);
4533
4534 D_MAC80211("leave ret %d\n", ret);
4535 return ret;
4536}
4537EXPORT_SYMBOL_GPL(il_mac_tx_last_beacon);
4538
4539static int
4540il_set_mode(struct il_priv *il)
4541{
4542 il_connection_init_rx_config(il);
4543
4544 if (il->ops->set_rxon_chain)
4545 il->ops->set_rxon_chain(il);
4546
4547 return il_commit_rxon(il);
4548}
4549
4550int
4551il_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
4552{
4553 struct il_priv *il = hw->priv;
4554 int err;
4555 bool reset;
4556
4557 mutex_lock(&il->mutex);
4558 D_MAC80211("enter: type %d, addr %pM\n", vif->type, vif->addr);
4559
4560 if (!il_is_ready_rf(il)) {
4561 IL_WARN("Try to add interface when device not ready\n");
4562 err = -EINVAL;
4563 goto out;
4564 }
4565
4566 /*
4567 * We do not support multiple virtual interfaces, but on hardware reset
4568 * we have to add the same interface again.
4569 */
4570 reset = (il->vif == vif);
4571 if (il->vif && !reset) {
4572 err = -EOPNOTSUPP;
4573 goto out;
4574 }
4575
4576 il->vif = vif;
4577 il->iw_mode = vif->type;
4578
4579 err = il_set_mode(il);
4580 if (err) {
4581 IL_WARN("Fail to set mode %d\n", vif->type);
4582 if (!reset) {
4583 il->vif = NULL;
4584 il->iw_mode = NL80211_IFTYPE_STATION;
4585 }
4586 }
4587
4588out:
4589 D_MAC80211("leave err %d\n", err);
4590 mutex_unlock(&il->mutex);
4591
4592 return err;
4593}
4594EXPORT_SYMBOL(il_mac_add_interface);
4595
4596static void
4597il_teardown_interface(struct il_priv *il, struct ieee80211_vif *vif)
4598{
4599 lockdep_assert_held(&il->mutex);
4600
4601 if (il->scan_vif == vif) {
4602 il_scan_cancel_timeout(il, 200);
4603 il_force_scan_end(il);
4604 }
4605
4606 il_set_mode(il);
4607}
4608
4609void
4610il_mac_remove_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
4611{
4612 struct il_priv *il = hw->priv;
4613
4614 mutex_lock(&il->mutex);
4615 D_MAC80211("enter: type %d, addr %pM\n", vif->type, vif->addr);
4616
4617 WARN_ON(il->vif != vif);
4618 il->vif = NULL;
4619 il->iw_mode = NL80211_IFTYPE_UNSPECIFIED;
4620 il_teardown_interface(il, vif);
4621 eth_zero_addr(il->bssid);
4622
4623 D_MAC80211("leave\n");
4624 mutex_unlock(&il->mutex);
4625}
4626EXPORT_SYMBOL(il_mac_remove_interface);
4627
4628int
4629il_alloc_txq_mem(struct il_priv *il)
4630{
4631 if (!il->txq)
4632 il->txq =
4633 kcalloc(il->cfg->num_of_queues,
4634 sizeof(struct il_tx_queue),
4635 GFP_KERNEL);
4636 if (!il->txq) {
4637 IL_ERR("Not enough memory for txq\n");
4638 return -ENOMEM;
4639 }
4640 return 0;
4641}
4642EXPORT_SYMBOL(il_alloc_txq_mem);
4643
4644void
4645il_free_txq_mem(struct il_priv *il)
4646{
4647 kfree(il->txq);
4648 il->txq = NULL;
4649}
4650EXPORT_SYMBOL(il_free_txq_mem);
4651
4652int
4653il_force_reset(struct il_priv *il, bool external)
4654{
4655 struct il_force_reset *force_reset;
4656
4657 if (test_bit(S_EXIT_PENDING, &il->status))
4658 return -EINVAL;
4659
4660 force_reset = &il->force_reset;
4661 force_reset->reset_request_count++;
4662 if (!external) {
4663 if (force_reset->last_force_reset_jiffies &&
4664 time_after(force_reset->last_force_reset_jiffies +
4665 force_reset->reset_duration, jiffies)) {
4666 D_INFO("force reset rejected\n");
4667 force_reset->reset_reject_count++;
4668 return -EAGAIN;
4669 }
4670 }
4671 force_reset->reset_success_count++;
4672 force_reset->last_force_reset_jiffies = jiffies;
4673
4674 /*
4675 * if the request is from external(ex: debugfs),
4676 * then always perform the request in regardless the module
4677 * parameter setting
4678 * if the request is from internal (uCode error or driver
4679 * detect failure), then fw_restart module parameter
4680 * need to be check before performing firmware reload
4681 */
4682
4683 if (!external && !il->cfg->mod_params->restart_fw) {
4684 D_INFO("Cancel firmware reload based on "
4685 "module parameter setting\n");
4686 return 0;
4687 }
4688
4689 IL_ERR("On demand firmware reload\n");
4690
4691 /* Set the FW error flag -- cleared on il_down */
4692 set_bit(S_FW_ERROR, &il->status);
4693 wake_up(&il->wait_command_queue);
4694 /*
4695 * Keep the restart process from trying to send host
4696 * commands by clearing the INIT status bit
4697 */
4698 clear_bit(S_READY, &il->status);
4699 queue_work(il->workqueue, &il->restart);
4700
4701 return 0;
4702}
4703EXPORT_SYMBOL(il_force_reset);
4704
4705int
4706il_mac_change_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
4707 enum nl80211_iftype newtype, bool newp2p)
4708{
4709 struct il_priv *il = hw->priv;
4710 int err;
4711
4712 mutex_lock(&il->mutex);
4713 D_MAC80211("enter: type %d, addr %pM newtype %d newp2p %d\n",
4714 vif->type, vif->addr, newtype, newp2p);
4715
4716 if (newp2p) {
4717 err = -EOPNOTSUPP;
4718 goto out;
4719 }
4720
4721 if (!il->vif || !il_is_ready_rf(il)) {
4722 /*
4723 * Huh? But wait ... this can maybe happen when
4724 * we're in the middle of a firmware restart!
4725 */
4726 err = -EBUSY;
4727 goto out;
4728 }
4729
4730 /* success */
4731 vif->type = newtype;
4732 vif->p2p = false;
4733 il->iw_mode = newtype;
4734 il_teardown_interface(il, vif);
4735 err = 0;
4736
4737out:
4738 D_MAC80211("leave err %d\n", err);
4739 mutex_unlock(&il->mutex);
4740
4741 return err;
4742}
4743EXPORT_SYMBOL(il_mac_change_interface);
4744
4745void il_mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
4746 u32 queues, bool drop)
4747{
4748 struct il_priv *il = hw->priv;
4749 unsigned long timeout = jiffies + msecs_to_jiffies(500);
4750 int i;
4751
4752 mutex_lock(&il->mutex);
4753 D_MAC80211("enter\n");
4754
4755 if (il->txq == NULL)
4756 goto out;
4757
4758 for (i = 0; i < il->hw_params.max_txq_num; i++) {
4759 struct il_queue *q;
4760
4761 if (i == il->cmd_queue)
4762 continue;
4763
4764 q = &il->txq[i].q;
4765 if (q->read_ptr == q->write_ptr)
4766 continue;
4767
4768 if (time_after(jiffies, timeout)) {
4769 IL_ERR("Failed to flush queue %d\n", q->id);
4770 break;
4771 }
4772
4773 msleep(20);
4774 }
4775out:
4776 D_MAC80211("leave\n");
4777 mutex_unlock(&il->mutex);
4778}
4779EXPORT_SYMBOL(il_mac_flush);
4780
4781/*
4782 * On every watchdog tick we check (latest) time stamp. If it does not
4783 * change during timeout period and queue is not empty we reset firmware.
4784 */
4785static int
4786il_check_stuck_queue(struct il_priv *il, int cnt)
4787{
4788 struct il_tx_queue *txq = &il->txq[cnt];
4789 struct il_queue *q = &txq->q;
4790 unsigned long timeout;
4791 unsigned long now = jiffies;
4792 int ret;
4793
4794 if (q->read_ptr == q->write_ptr) {
4795 txq->time_stamp = now;
4796 return 0;
4797 }
4798
4799 timeout =
4800 txq->time_stamp +
4801 msecs_to_jiffies(il->cfg->wd_timeout);
4802
4803 if (time_after(now, timeout)) {
4804 IL_ERR("Queue %d stuck for %u ms.\n", q->id,
4805 jiffies_to_msecs(now - txq->time_stamp));
4806 ret = il_force_reset(il, false);
4807 return (ret == -EAGAIN) ? 0 : 1;
4808 }
4809
4810 return 0;
4811}
4812
4813/*
4814 * Making watchdog tick be a quarter of timeout assure we will
4815 * discover the queue hung between timeout and 1.25*timeout
4816 */
4817#define IL_WD_TICK(timeout) ((timeout) / 4)
4818
4819/*
4820 * Watchdog timer callback, we check each tx queue for stuck, if if hung
4821 * we reset the firmware. If everything is fine just rearm the timer.
4822 */
4823void
4824il_bg_watchdog(struct timer_list *t)
4825{
4826 struct il_priv *il = from_timer(il, t, watchdog);
4827 int cnt;
4828 unsigned long timeout;
4829
4830 if (test_bit(S_EXIT_PENDING, &il->status))
4831 return;
4832
4833 timeout = il->cfg->wd_timeout;
4834 if (timeout == 0)
4835 return;
4836
4837 /* monitor and check for stuck cmd queue */
4838 if (il_check_stuck_queue(il, il->cmd_queue))
4839 return;
4840
4841 /* monitor and check for other stuck queues */
4842 for (cnt = 0; cnt < il->hw_params.max_txq_num; cnt++) {
4843 /* skip as we already checked the command queue */
4844 if (cnt == il->cmd_queue)
4845 continue;
4846 if (il_check_stuck_queue(il, cnt))
4847 return;
4848 }
4849
4850 mod_timer(&il->watchdog,
4851 jiffies + msecs_to_jiffies(IL_WD_TICK(timeout)));
4852}
4853EXPORT_SYMBOL(il_bg_watchdog);
4854
4855void
4856il_setup_watchdog(struct il_priv *il)
4857{
4858 unsigned int timeout = il->cfg->wd_timeout;
4859
4860 if (timeout)
4861 mod_timer(&il->watchdog,
4862 jiffies + msecs_to_jiffies(IL_WD_TICK(timeout)));
4863 else
4864 del_timer(&il->watchdog);
4865}
4866EXPORT_SYMBOL(il_setup_watchdog);
4867
4868/*
4869 * extended beacon time format
4870 * time in usec will be changed into a 32-bit value in extended:internal format
4871 * the extended part is the beacon counts
4872 * the internal part is the time in usec within one beacon interval
4873 */
4874u32
4875il_usecs_to_beacons(struct il_priv *il, u32 usec, u32 beacon_interval)
4876{
4877 u32 quot;
4878 u32 rem;
4879 u32 interval = beacon_interval * TIME_UNIT;
4880
4881 if (!interval || !usec)
4882 return 0;
4883
4884 quot =
4885 (usec /
4886 interval) & (il_beacon_time_mask_high(il,
4887 il->hw_params.
4888 beacon_time_tsf_bits) >> il->
4889 hw_params.beacon_time_tsf_bits);
4890 rem =
4891 (usec % interval) & il_beacon_time_mask_low(il,
4892 il->hw_params.
4893 beacon_time_tsf_bits);
4894
4895 return (quot << il->hw_params.beacon_time_tsf_bits) + rem;
4896}
4897EXPORT_SYMBOL(il_usecs_to_beacons);
4898
4899/* base is usually what we get from ucode with each received frame,
4900 * the same as HW timer counter counting down
4901 */
4902__le32
4903il_add_beacon_time(struct il_priv *il, u32 base, u32 addon,
4904 u32 beacon_interval)
4905{
4906 u32 base_low = base & il_beacon_time_mask_low(il,
4907 il->hw_params.
4908 beacon_time_tsf_bits);
4909 u32 addon_low = addon & il_beacon_time_mask_low(il,
4910 il->hw_params.
4911 beacon_time_tsf_bits);
4912 u32 interval = beacon_interval * TIME_UNIT;
4913 u32 res = (base & il_beacon_time_mask_high(il,
4914 il->hw_params.
4915 beacon_time_tsf_bits)) +
4916 (addon & il_beacon_time_mask_high(il,
4917 il->hw_params.
4918 beacon_time_tsf_bits));
4919
4920 if (base_low > addon_low)
4921 res += base_low - addon_low;
4922 else if (base_low < addon_low) {
4923 res += interval + base_low - addon_low;
4924 res += (1 << il->hw_params.beacon_time_tsf_bits);
4925 } else
4926 res += (1 << il->hw_params.beacon_time_tsf_bits);
4927
4928 return cpu_to_le32(res);
4929}
4930EXPORT_SYMBOL(il_add_beacon_time);
4931
4932#ifdef CONFIG_PM_SLEEP
4933
4934static int
4935il_pci_suspend(struct device *device)
4936{
4937 struct il_priv *il = dev_get_drvdata(device);
4938
4939 /*
4940 * This function is called when system goes into suspend state
4941 * mac80211 will call il_mac_stop() from the mac80211 suspend function
4942 * first but since il_mac_stop() has no knowledge of who the caller is,
4943 * it will not call apm_ops.stop() to stop the DMA operation.
4944 * Calling apm_ops.stop here to make sure we stop the DMA.
4945 */
4946 il_apm_stop(il);
4947
4948 return 0;
4949}
4950
4951static int
4952il_pci_resume(struct device *device)
4953{
4954 struct pci_dev *pdev = to_pci_dev(device);
4955 struct il_priv *il = pci_get_drvdata(pdev);
4956 bool hw_rfkill = false;
4957
4958 /*
4959 * We disable the RETRY_TIMEOUT register (0x41) to keep
4960 * PCI Tx retries from interfering with C3 CPU state.
4961 */
4962 pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
4963
4964 il_enable_interrupts(il);
4965
4966 if (!(_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
4967 hw_rfkill = true;
4968
4969 if (hw_rfkill)
4970 set_bit(S_RFKILL, &il->status);
4971 else
4972 clear_bit(S_RFKILL, &il->status);
4973
4974 wiphy_rfkill_set_hw_state(il->hw->wiphy, hw_rfkill);
4975
4976 return 0;
4977}
4978
4979SIMPLE_DEV_PM_OPS(il_pm_ops, il_pci_suspend, il_pci_resume);
4980EXPORT_SYMBOL(il_pm_ops);
4981
4982#endif /* CONFIG_PM_SLEEP */
4983
4984static void
4985il_update_qos(struct il_priv *il)
4986{
4987 if (test_bit(S_EXIT_PENDING, &il->status))
4988 return;
4989
4990 il->qos_data.def_qos_parm.qos_flags = 0;
4991
4992 if (il->qos_data.qos_active)
4993 il->qos_data.def_qos_parm.qos_flags |=
4994 QOS_PARAM_FLG_UPDATE_EDCA_MSK;
4995
4996 if (il->ht.enabled)
4997 il->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
4998
4999 D_QOS("send QoS cmd with Qos active=%d FLAGS=0x%X\n",
5000 il->qos_data.qos_active, il->qos_data.def_qos_parm.qos_flags);
5001
5002 il_send_cmd_pdu_async(il, C_QOS_PARAM, sizeof(struct il_qosparam_cmd),
5003 &il->qos_data.def_qos_parm, NULL);
5004}
5005
5006/*
5007 * il_mac_config - mac80211 config callback
5008 */
5009int
5010il_mac_config(struct ieee80211_hw *hw, u32 changed)
5011{
5012 struct il_priv *il = hw->priv;
5013 const struct il_channel_info *ch_info;
5014 struct ieee80211_conf *conf = &hw->conf;
5015 struct ieee80211_channel *channel = conf->chandef.chan;
5016 struct il_ht_config *ht_conf = &il->current_ht_config;
5017 unsigned long flags = 0;
5018 int ret = 0;
5019 u16 ch;
5020 int scan_active = 0;
5021 bool ht_changed = false;
5022
5023 mutex_lock(&il->mutex);
5024 D_MAC80211("enter: channel %d changed 0x%X\n", channel->hw_value,
5025 changed);
5026
5027 if (unlikely(test_bit(S_SCANNING, &il->status))) {
5028 scan_active = 1;
5029 D_MAC80211("scan active\n");
5030 }
5031
5032 if (changed &
5033 (IEEE80211_CONF_CHANGE_SMPS | IEEE80211_CONF_CHANGE_CHANNEL)) {
5034 /* mac80211 uses static for non-HT which is what we want */
5035 il->current_ht_config.smps = conf->smps_mode;
5036
5037 /*
5038 * Recalculate chain counts.
5039 *
5040 * If monitor mode is enabled then mac80211 will
5041 * set up the SM PS mode to OFF if an HT channel is
5042 * configured.
5043 */
5044 if (il->ops->set_rxon_chain)
5045 il->ops->set_rxon_chain(il);
5046 }
5047
5048 /* during scanning mac80211 will delay channel setting until
5049 * scan finish with changed = 0
5050 */
5051 if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
5052
5053 if (scan_active)
5054 goto set_ch_out;
5055
5056 ch = channel->hw_value;
5057 ch_info = il_get_channel_info(il, channel->band, ch);
5058 if (!il_is_channel_valid(ch_info)) {
5059 D_MAC80211("leave - invalid channel\n");
5060 ret = -EINVAL;
5061 goto set_ch_out;
5062 }
5063
5064 if (il->iw_mode == NL80211_IFTYPE_ADHOC &&
5065 !il_is_channel_ibss(ch_info)) {
5066 D_MAC80211("leave - not IBSS channel\n");
5067 ret = -EINVAL;
5068 goto set_ch_out;
5069 }
5070
5071 spin_lock_irqsave(&il->lock, flags);
5072
5073 /* Configure HT40 channels */
5074 if (il->ht.enabled != conf_is_ht(conf)) {
5075 il->ht.enabled = conf_is_ht(conf);
5076 ht_changed = true;
5077 }
5078 if (il->ht.enabled) {
5079 if (conf_is_ht40_minus(conf)) {
5080 il->ht.extension_chan_offset =
5081 IEEE80211_HT_PARAM_CHA_SEC_BELOW;
5082 il->ht.is_40mhz = true;
5083 } else if (conf_is_ht40_plus(conf)) {
5084 il->ht.extension_chan_offset =
5085 IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
5086 il->ht.is_40mhz = true;
5087 } else {
5088 il->ht.extension_chan_offset =
5089 IEEE80211_HT_PARAM_CHA_SEC_NONE;
5090 il->ht.is_40mhz = false;
5091 }
5092 } else
5093 il->ht.is_40mhz = false;
5094
5095 /*
5096 * Default to no protection. Protection mode will
5097 * later be set from BSS config in il_ht_conf
5098 */
5099 il->ht.protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
5100
5101 /* if we are switching from ht to 2.4 clear flags
5102 * from any ht related info since 2.4 does not
5103 * support ht */
5104 if ((le16_to_cpu(il->staging.channel) != ch))
5105 il->staging.flags = 0;
5106
5107 il_set_rxon_channel(il, channel);
5108 il_set_rxon_ht(il, ht_conf);
5109
5110 il_set_flags_for_band(il, channel->band, il->vif);
5111
5112 spin_unlock_irqrestore(&il->lock, flags);
5113
5114 if (il->ops->update_bcast_stations)
5115 ret = il->ops->update_bcast_stations(il);
5116
5117set_ch_out:
5118 /* The list of supported rates and rate mask can be different
5119 * for each band; since the band may have changed, reset
5120 * the rate mask to what mac80211 lists */
5121 il_set_rate(il);
5122 }
5123
5124 if (changed & (IEEE80211_CONF_CHANGE_PS | IEEE80211_CONF_CHANGE_IDLE)) {
5125 il->power_data.ps_disabled = !(conf->flags & IEEE80211_CONF_PS);
5126 if (!il->power_data.ps_disabled)
5127 IL_WARN_ONCE("Enabling power save might cause firmware crashes\n");
5128 ret = il_power_update_mode(il, false);
5129 if (ret)
5130 D_MAC80211("Error setting sleep level\n");
5131 }
5132
5133 if (changed & IEEE80211_CONF_CHANGE_POWER) {
5134 D_MAC80211("TX Power old=%d new=%d\n", il->tx_power_user_lmt,
5135 conf->power_level);
5136
5137 il_set_tx_power(il, conf->power_level, false);
5138 }
5139
5140 if (!il_is_ready(il)) {
5141 D_MAC80211("leave - not ready\n");
5142 goto out;
5143 }
5144
5145 if (scan_active)
5146 goto out;
5147
5148 if (memcmp(&il->active, &il->staging, sizeof(il->staging)))
5149 il_commit_rxon(il);
5150 else
5151 D_INFO("Not re-sending same RXON configuration.\n");
5152 if (ht_changed)
5153 il_update_qos(il);
5154
5155out:
5156 D_MAC80211("leave ret %d\n", ret);
5157 mutex_unlock(&il->mutex);
5158
5159 return ret;
5160}
5161EXPORT_SYMBOL(il_mac_config);
5162
5163void
5164il_mac_reset_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
5165{
5166 struct il_priv *il = hw->priv;
5167 unsigned long flags;
5168
5169 mutex_lock(&il->mutex);
5170 D_MAC80211("enter: type %d, addr %pM\n", vif->type, vif->addr);
5171
5172 spin_lock_irqsave(&il->lock, flags);
5173
5174 memset(&il->current_ht_config, 0, sizeof(struct il_ht_config));
5175
5176 /* new association get rid of ibss beacon skb */
5177 dev_kfree_skb(il->beacon_skb);
5178 il->beacon_skb = NULL;
5179 il->timestamp = 0;
5180
5181 spin_unlock_irqrestore(&il->lock, flags);
5182
5183 il_scan_cancel_timeout(il, 100);
5184 if (!il_is_ready_rf(il)) {
5185 D_MAC80211("leave - not ready\n");
5186 mutex_unlock(&il->mutex);
5187 return;
5188 }
5189
5190 /* we are restarting association process */
5191 il->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5192 il_commit_rxon(il);
5193
5194 il_set_rate(il);
5195
5196 D_MAC80211("leave\n");
5197 mutex_unlock(&il->mutex);
5198}
5199EXPORT_SYMBOL(il_mac_reset_tsf);
5200
5201static void
5202il_ht_conf(struct il_priv *il, struct ieee80211_vif *vif)
5203{
5204 struct il_ht_config *ht_conf = &il->current_ht_config;
5205 struct ieee80211_sta *sta;
5206 struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
5207
5208 D_ASSOC("enter:\n");
5209
5210 if (!il->ht.enabled)
5211 return;
5212
5213 il->ht.protection =
5214 bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
5215 il->ht.non_gf_sta_present =
5216 !!(bss_conf->
5217 ht_operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
5218
5219 ht_conf->single_chain_sufficient = false;
5220
5221 switch (vif->type) {
5222 case NL80211_IFTYPE_STATION:
5223 rcu_read_lock();
5224 sta = ieee80211_find_sta(vif, bss_conf->bssid);
5225 if (sta) {
5226 struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
5227 int maxstreams;
5228
5229 maxstreams =
5230 (ht_cap->mcs.
5231 tx_params & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
5232 >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
5233 maxstreams += 1;
5234
5235 if (ht_cap->mcs.rx_mask[1] == 0 &&
5236 ht_cap->mcs.rx_mask[2] == 0)
5237 ht_conf->single_chain_sufficient = true;
5238 if (maxstreams <= 1)
5239 ht_conf->single_chain_sufficient = true;
5240 } else {
5241 /*
5242 * If at all, this can only happen through a race
5243 * when the AP disconnects us while we're still
5244 * setting up the connection, in that case mac80211
5245 * will soon tell us about that.
5246 */
5247 ht_conf->single_chain_sufficient = true;
5248 }
5249 rcu_read_unlock();
5250 break;
5251 case NL80211_IFTYPE_ADHOC:
5252 ht_conf->single_chain_sufficient = true;
5253 break;
5254 default:
5255 break;
5256 }
5257
5258 D_ASSOC("leave\n");
5259}
5260
5261static inline void
5262il_set_no_assoc(struct il_priv *il, struct ieee80211_vif *vif)
5263{
5264 /*
5265 * inform the ucode that there is no longer an
5266 * association and that no more packets should be
5267 * sent
5268 */
5269 il->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5270 il->staging.assoc_id = 0;
5271 il_commit_rxon(il);
5272}
5273
5274static void
5275il_beacon_update(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
5276{
5277 struct il_priv *il = hw->priv;
5278 unsigned long flags;
5279 __le64 timestamp;
5280 struct sk_buff *skb = ieee80211_beacon_get(hw, vif);
5281
5282 if (!skb)
5283 return;
5284
5285 D_MAC80211("enter\n");
5286
5287 lockdep_assert_held(&il->mutex);
5288
5289 if (!il->beacon_enabled) {
5290 IL_ERR("update beacon with no beaconing enabled\n");
5291 dev_kfree_skb(skb);
5292 return;
5293 }
5294
5295 spin_lock_irqsave(&il->lock, flags);
5296 dev_kfree_skb(il->beacon_skb);
5297 il->beacon_skb = skb;
5298
5299 timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
5300 il->timestamp = le64_to_cpu(timestamp);
5301
5302 D_MAC80211("leave\n");
5303 spin_unlock_irqrestore(&il->lock, flags);
5304
5305 if (!il_is_ready_rf(il)) {
5306 D_MAC80211("leave - RF not ready\n");
5307 return;
5308 }
5309
5310 il->ops->post_associate(il);
5311}
5312
5313void
5314il_mac_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5315 struct ieee80211_bss_conf *bss_conf, u32 changes)
5316{
5317 struct il_priv *il = hw->priv;
5318 int ret;
5319
5320 mutex_lock(&il->mutex);
5321 D_MAC80211("enter: changes 0x%x\n", changes);
5322
5323 if (!il_is_alive(il)) {
5324 D_MAC80211("leave - not alive\n");
5325 mutex_unlock(&il->mutex);
5326 return;
5327 }
5328
5329 if (changes & BSS_CHANGED_QOS) {
5330 unsigned long flags;
5331
5332 spin_lock_irqsave(&il->lock, flags);
5333 il->qos_data.qos_active = bss_conf->qos;
5334 il_update_qos(il);
5335 spin_unlock_irqrestore(&il->lock, flags);
5336 }
5337
5338 if (changes & BSS_CHANGED_BEACON_ENABLED) {
5339 /* FIXME: can we remove beacon_enabled ? */
5340 if (vif->bss_conf.enable_beacon)
5341 il->beacon_enabled = true;
5342 else
5343 il->beacon_enabled = false;
5344 }
5345
5346 if (changes & BSS_CHANGED_BSSID) {
5347 D_MAC80211("BSSID %pM\n", bss_conf->bssid);
5348
5349 /*
5350 * On passive channel we wait with blocked queues to see if
5351 * there is traffic on that channel. If no frame will be
5352 * received (what is very unlikely since scan detects AP on
5353 * that channel, but theoretically possible), mac80211 associate
5354 * procedure will time out and mac80211 will call us with NULL
5355 * bssid. We have to unblock queues on such condition.
5356 */
5357 if (is_zero_ether_addr(bss_conf->bssid))
5358 il_wake_queues_by_reason(il, IL_STOP_REASON_PASSIVE);
5359
5360 /*
5361 * If there is currently a HW scan going on in the background,
5362 * then we need to cancel it, otherwise sometimes we are not
5363 * able to authenticate (FIXME: why ?)
5364 */
5365 if (il_scan_cancel_timeout(il, 100)) {
5366 D_MAC80211("leave - scan abort failed\n");
5367 mutex_unlock(&il->mutex);
5368 return;
5369 }
5370
5371 /* mac80211 only sets assoc when in STATION mode */
5372 memcpy(il->staging.bssid_addr, bss_conf->bssid, ETH_ALEN);
5373
5374 /* FIXME: currently needed in a few places */
5375 memcpy(il->bssid, bss_conf->bssid, ETH_ALEN);
5376 }
5377
5378 /*
5379 * This needs to be after setting the BSSID in case
5380 * mac80211 decides to do both changes at once because
5381 * it will invoke post_associate.
5382 */
5383 if (vif->type == NL80211_IFTYPE_ADHOC && (changes & BSS_CHANGED_BEACON))
5384 il_beacon_update(hw, vif);
5385
5386 if (changes & BSS_CHANGED_ERP_PREAMBLE) {
5387 D_MAC80211("ERP_PREAMBLE %d\n", bss_conf->use_short_preamble);
5388 if (bss_conf->use_short_preamble)
5389 il->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
5390 else
5391 il->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
5392 }
5393
5394 if (changes & BSS_CHANGED_ERP_CTS_PROT) {
5395 D_MAC80211("ERP_CTS %d\n", bss_conf->use_cts_prot);
5396 if (bss_conf->use_cts_prot && il->band != NL80211_BAND_5GHZ)
5397 il->staging.flags |= RXON_FLG_TGG_PROTECT_MSK;
5398 else
5399 il->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
5400 if (bss_conf->use_cts_prot)
5401 il->staging.flags |= RXON_FLG_SELF_CTS_EN;
5402 else
5403 il->staging.flags &= ~RXON_FLG_SELF_CTS_EN;
5404 }
5405
5406 if (changes & BSS_CHANGED_BASIC_RATES) {
5407 /* XXX use this information
5408 *
5409 * To do that, remove code from il_set_rate() and put something
5410 * like this here:
5411 *
5412 if (A-band)
5413 il->staging.ofdm_basic_rates =
5414 bss_conf->basic_rates;
5415 else
5416 il->staging.ofdm_basic_rates =
5417 bss_conf->basic_rates >> 4;
5418 il->staging.cck_basic_rates =
5419 bss_conf->basic_rates & 0xF;
5420 */
5421 }
5422
5423 if (changes & BSS_CHANGED_HT) {
5424 il_ht_conf(il, vif);
5425
5426 if (il->ops->set_rxon_chain)
5427 il->ops->set_rxon_chain(il);
5428 }
5429
5430 if (changes & BSS_CHANGED_ASSOC) {
5431 D_MAC80211("ASSOC %d\n", bss_conf->assoc);
5432 if (bss_conf->assoc) {
5433 il->timestamp = bss_conf->sync_tsf;
5434
5435 if (!il_is_rfkill(il))
5436 il->ops->post_associate(il);
5437 } else
5438 il_set_no_assoc(il, vif);
5439 }
5440
5441 if (changes && il_is_associated(il) && bss_conf->aid) {
5442 D_MAC80211("Changes (%#x) while associated\n", changes);
5443 ret = il_send_rxon_assoc(il);
5444 if (!ret) {
5445 /* Sync active_rxon with latest change. */
5446 memcpy((void *)&il->active, &il->staging,
5447 sizeof(struct il_rxon_cmd));
5448 }
5449 }
5450
5451 if (changes & BSS_CHANGED_BEACON_ENABLED) {
5452 if (vif->bss_conf.enable_beacon) {
5453 memcpy(il->staging.bssid_addr, bss_conf->bssid,
5454 ETH_ALEN);
5455 memcpy(il->bssid, bss_conf->bssid, ETH_ALEN);
5456 il->ops->config_ap(il);
5457 } else
5458 il_set_no_assoc(il, vif);
5459 }
5460
5461 if (changes & BSS_CHANGED_IBSS) {
5462 ret = il->ops->manage_ibss_station(il, vif,
5463 bss_conf->ibss_joined);
5464 if (ret)
5465 IL_ERR("failed to %s IBSS station %pM\n",
5466 bss_conf->ibss_joined ? "add" : "remove",
5467 bss_conf->bssid);
5468 }
5469
5470 D_MAC80211("leave\n");
5471 mutex_unlock(&il->mutex);
5472}
5473EXPORT_SYMBOL(il_mac_bss_info_changed);
5474
5475irqreturn_t
5476il_isr(int irq, void *data)
5477{
5478 struct il_priv *il = data;
5479 u32 inta, inta_mask;
5480 u32 inta_fh;
5481 unsigned long flags;
5482 if (!il)
5483 return IRQ_NONE;
5484
5485 spin_lock_irqsave(&il->lock, flags);
5486
5487 /* Disable (but don't clear!) interrupts here to avoid
5488 * back-to-back ISRs and sporadic interrupts from our NIC.
5489 * If we have something to service, the tasklet will re-enable ints.
5490 * If we *don't* have something, we'll re-enable before leaving here. */
5491 inta_mask = _il_rd(il, CSR_INT_MASK); /* just for debug */
5492 _il_wr(il, CSR_INT_MASK, 0x00000000);
5493
5494 /* Discover which interrupts are active/pending */
5495 inta = _il_rd(il, CSR_INT);
5496 inta_fh = _il_rd(il, CSR_FH_INT_STATUS);
5497
5498 /* Ignore interrupt if there's nothing in NIC to service.
5499 * This may be due to IRQ shared with another device,
5500 * or due to sporadic interrupts thrown from our NIC. */
5501 if (!inta && !inta_fh) {
5502 D_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
5503 goto none;
5504 }
5505
5506 if (inta == 0xFFFFFFFF || (inta & 0xFFFFFFF0) == 0xa5a5a5a0) {
5507 /* Hardware disappeared. It might have already raised
5508 * an interrupt */
5509 IL_WARN("HARDWARE GONE?? INTA == 0x%08x\n", inta);
5510 goto unplugged;
5511 }
5512
5513 D_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n", inta, inta_mask,
5514 inta_fh);
5515
5516 inta &= ~CSR_INT_BIT_SCD;
5517
5518 /* il_irq_tasklet() will service interrupts and re-enable them */
5519 if (likely(inta || inta_fh))
5520 tasklet_schedule(&il->irq_tasklet);
5521
5522unplugged:
5523 spin_unlock_irqrestore(&il->lock, flags);
5524 return IRQ_HANDLED;
5525
5526none:
5527 /* re-enable interrupts here since we don't have anything to service. */
5528 /* only Re-enable if disabled by irq */
5529 if (test_bit(S_INT_ENABLED, &il->status))
5530 il_enable_interrupts(il);
5531 spin_unlock_irqrestore(&il->lock, flags);
5532 return IRQ_NONE;
5533}
5534EXPORT_SYMBOL(il_isr);
5535
5536/*
5537 * il_tx_cmd_protection: Set rts/cts. 3945 and 4965 only share this
5538 * function.
5539 */
5540void
5541il_tx_cmd_protection(struct il_priv *il, struct ieee80211_tx_info *info,
5542 __le16 fc, __le32 *tx_flags)
5543{
5544 if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
5545 *tx_flags |= TX_CMD_FLG_RTS_MSK;
5546 *tx_flags &= ~TX_CMD_FLG_CTS_MSK;
5547 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
5548
5549 if (!ieee80211_is_mgmt(fc))
5550 return;
5551
5552 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
5553 case cpu_to_le16(IEEE80211_STYPE_AUTH):
5554 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
5555 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
5556 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
5557 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
5558 *tx_flags |= TX_CMD_FLG_CTS_MSK;
5559 break;
5560 }
5561 } else if (info->control.rates[0].
5562 flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
5563 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
5564 *tx_flags |= TX_CMD_FLG_CTS_MSK;
5565 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
5566 }
5567}
5568EXPORT_SYMBOL(il_tx_cmd_protection);