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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (c) 2012 - 2018 Microchip Technology Inc., and its subsidiaries.
4 * All rights reserved.
5 */
6
7#include <linux/irq.h>
8#include <linux/kthread.h>
9#include <linux/firmware.h>
10#include <linux/netdevice.h>
11#include <linux/inetdevice.h>
12
13#include "cfg80211.h"
14#include "wlan_cfg.h"
15
16#define WILC_MULTICAST_TABLE_SIZE 8
17#define WILC_MAX_FW_VERSION_STR_SIZE 50
18
19/* latest API version supported */
20#define WILC1000_API_VER 1
21
22#define WILC1000_FW_PREFIX "atmel/wilc1000_wifi_firmware-"
23#define __WILC1000_FW(api) WILC1000_FW_PREFIX #api ".bin"
24#define WILC1000_FW(api) __WILC1000_FW(api)
25
26#define WILC3000_API_VER 1
27
28#define WILC3000_FW_PREFIX "atmel/wilc3000_wifi_firmware-"
29#define __WILC3000_FW(api) WILC3000_FW_PREFIX #api ".bin"
30#define WILC3000_FW(api) __WILC3000_FW(api)
31
32static irqreturn_t isr_uh_routine(int irq, void *user_data)
33{
34 struct wilc *wilc = user_data;
35
36 if (wilc->close) {
37 pr_err("Can't handle UH interrupt\n");
38 return IRQ_HANDLED;
39 }
40 return IRQ_WAKE_THREAD;
41}
42
43static irqreturn_t isr_bh_routine(int irq, void *userdata)
44{
45 struct wilc *wilc = userdata;
46
47 if (wilc->close) {
48 pr_err("Can't handle BH interrupt\n");
49 return IRQ_HANDLED;
50 }
51
52 wilc_handle_isr(wilc);
53
54 return IRQ_HANDLED;
55}
56
57static int init_irq(struct net_device *dev)
58{
59 struct wilc_vif *vif = netdev_priv(dev);
60 struct wilc *wl = vif->wilc;
61 int ret;
62
63 ret = request_threaded_irq(wl->dev_irq_num, isr_uh_routine,
64 isr_bh_routine,
65 IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
66 dev->name, wl);
67 if (ret) {
68 netdev_err(dev, "Failed to request IRQ [%d]\n", ret);
69 return ret;
70 }
71 netdev_dbg(dev, "IRQ request succeeded IRQ-NUM= %d\n", wl->dev_irq_num);
72
73 return 0;
74}
75
76static void deinit_irq(struct net_device *dev)
77{
78 struct wilc_vif *vif = netdev_priv(dev);
79 struct wilc *wilc = vif->wilc;
80
81 /* Deinitialize IRQ */
82 if (wilc->dev_irq_num)
83 free_irq(wilc->dev_irq_num, wilc);
84}
85
86void wilc_mac_indicate(struct wilc *wilc)
87{
88 s8 status;
89
90 wilc_wlan_cfg_get_val(wilc, WID_STATUS, &status, 1);
91 if (wilc->mac_status == WILC_MAC_STATUS_INIT) {
92 wilc->mac_status = status;
93 complete(&wilc->sync_event);
94 } else {
95 wilc->mac_status = status;
96 }
97}
98
99static struct net_device *get_if_handler(struct wilc *wilc, u8 *mac_header)
100{
101 struct net_device *ndev = NULL;
102 struct wilc_vif *vif;
103 struct ieee80211_hdr *h = (struct ieee80211_hdr *)mac_header;
104
105 wilc_for_each_vif(wilc, vif) {
106 if (vif->iftype == WILC_STATION_MODE)
107 if (ether_addr_equal_unaligned(h->addr2, vif->bssid)) {
108 ndev = vif->ndev;
109 goto out;
110 }
111 if (vif->iftype == WILC_AP_MODE)
112 if (ether_addr_equal_unaligned(h->addr1, vif->bssid)) {
113 ndev = vif->ndev;
114 goto out;
115 }
116 }
117out:
118 return ndev;
119}
120
121void wilc_wlan_set_bssid(struct net_device *wilc_netdev, const u8 *bssid,
122 u8 mode)
123{
124 struct wilc_vif *vif = netdev_priv(wilc_netdev);
125
126 if (bssid)
127 ether_addr_copy(vif->bssid, bssid);
128 else
129 eth_zero_addr(vif->bssid);
130
131 vif->iftype = mode;
132}
133
134int wilc_wlan_get_num_conn_ifcs(struct wilc *wilc)
135{
136 int srcu_idx;
137 u8 ret_val = 0;
138 struct wilc_vif *vif;
139
140 srcu_idx = srcu_read_lock(&wilc->srcu);
141 wilc_for_each_vif(wilc, vif) {
142 if (!is_zero_ether_addr(vif->bssid))
143 ret_val++;
144 }
145 srcu_read_unlock(&wilc->srcu, srcu_idx);
146 return ret_val;
147}
148
149static void wilc_wake_tx_queues(struct wilc *wl)
150{
151 int srcu_idx;
152 struct wilc_vif *ifc;
153
154 srcu_idx = srcu_read_lock(&wl->srcu);
155 wilc_for_each_vif(wl, ifc) {
156 if (ifc->mac_opened && netif_queue_stopped(ifc->ndev))
157 netif_wake_queue(ifc->ndev);
158 }
159 srcu_read_unlock(&wl->srcu, srcu_idx);
160}
161
162static int wilc_txq_task(void *vp)
163{
164 int ret;
165 u32 txq_count;
166 struct wilc *wl = vp;
167
168 complete(&wl->txq_thread_started);
169 while (1) {
170 if (wait_for_completion_interruptible(&wl->txq_event))
171 continue;
172 if (wl->close) {
173 complete(&wl->txq_thread_started);
174
175 while (!kthread_should_stop())
176 schedule();
177 break;
178 }
179 do {
180 ret = wilc_wlan_handle_txq(wl, &txq_count);
181 if (txq_count < FLOW_CONTROL_LOWER_THRESHOLD) {
182 wilc_wake_tx_queues(wl);
183 }
184 if (ret != WILC_VMM_ENTRY_FULL_RETRY)
185 break;
186 /* Back off TX task from sending packets for some time.
187 * msleep_interruptible will allow RX task to run and
188 * free buffers. TX task will be in TASK_INTERRUPTIBLE
189 * state which will put the thread back to CPU running
190 * queue when it's signaled even if the timeout isn't
191 * elapsed. This gives faster chance for reserved SK
192 * buffers to be free.
193 */
194 msleep_interruptible(TX_BACKOFF_WEIGHT_MS);
195 } while (!wl->close);
196 }
197 return 0;
198}
199
200static int wilc_wlan_get_firmware(struct net_device *dev)
201{
202 struct wilc_vif *vif = netdev_priv(dev);
203 struct wilc *wilc = vif->wilc;
204 const struct firmware *wilc_fw;
205 char *firmware;
206 int ret;
207
208 if (is_wilc1000(wilc->chipid))
209 firmware = WILC1000_FW(WILC1000_API_VER);
210 else if (is_wilc3000(wilc->chipid))
211 firmware = WILC3000_FW(WILC3000_API_VER);
212 else
213 return -EINVAL;
214
215 netdev_info(dev, "WILC%d loading firmware [%s]\n",
216 is_wilc1000(wilc->chipid) ? 1000 : 3000,
217 firmware);
218
219 ret = request_firmware(&wilc_fw, firmware, wilc->dev);
220 if (ret != 0) {
221 netdev_err(dev, "%s - firmware not available\n", firmware);
222 return -EINVAL;
223 }
224 wilc->firmware = wilc_fw;
225
226 return 0;
227}
228
229static int wilc_start_firmware(struct net_device *dev)
230{
231 struct wilc_vif *vif = netdev_priv(dev);
232 struct wilc *wilc = vif->wilc;
233 int ret = 0;
234
235 ret = wilc_wlan_start(wilc);
236 if (ret)
237 return ret;
238
239 if (!wait_for_completion_timeout(&wilc->sync_event,
240 msecs_to_jiffies(5000)))
241 return -ETIME;
242
243 return 0;
244}
245
246static int wilc_firmware_download(struct net_device *dev)
247{
248 struct wilc_vif *vif = netdev_priv(dev);
249 struct wilc *wilc = vif->wilc;
250 int ret = 0;
251
252 if (!wilc->firmware) {
253 netdev_err(dev, "Firmware buffer is NULL\n");
254 return -ENOBUFS;
255 }
256
257 ret = wilc_wlan_firmware_download(wilc, wilc->firmware->data,
258 wilc->firmware->size);
259 if (ret)
260 return ret;
261
262 release_firmware(wilc->firmware);
263 wilc->firmware = NULL;
264
265 netdev_dbg(dev, "Download Succeeded\n");
266
267 return 0;
268}
269
270static int wilc_init_fw_config(struct net_device *dev, struct wilc_vif *vif)
271{
272 struct wilc_priv *priv = &vif->priv;
273 struct host_if_drv *hif_drv;
274 u8 b;
275 u16 hw;
276 u32 w;
277
278 netdev_dbg(dev, "Start configuring Firmware\n");
279 hif_drv = (struct host_if_drv *)priv->hif_drv;
280 netdev_dbg(dev, "Host = %p\n", hif_drv);
281
282 w = vif->iftype;
283 cpu_to_le32s(&w);
284 if (!wilc_wlan_cfg_set(vif, 1, WID_SET_OPERATION_MODE, (u8 *)&w, 4,
285 0, 0))
286 goto fail;
287
288 b = WILC_FW_BSS_TYPE_INFRA;
289 if (!wilc_wlan_cfg_set(vif, 0, WID_BSS_TYPE, &b, 1, 0, 0))
290 goto fail;
291
292 b = WILC_FW_TX_RATE_AUTO;
293 if (!wilc_wlan_cfg_set(vif, 0, WID_CURRENT_TX_RATE, &b, 1, 0, 0))
294 goto fail;
295
296 b = WILC_FW_OPER_MODE_G_MIXED_11B_2;
297 if (!wilc_wlan_cfg_set(vif, 0, WID_11G_OPERATING_MODE, &b, 1, 0, 0))
298 goto fail;
299
300 b = WILC_FW_PREAMBLE_AUTO;
301 if (!wilc_wlan_cfg_set(vif, 0, WID_PREAMBLE, &b, 1, 0, 0))
302 goto fail;
303
304 b = WILC_FW_11N_PROT_AUTO;
305 if (!wilc_wlan_cfg_set(vif, 0, WID_11N_PROT_MECH, &b, 1, 0, 0))
306 goto fail;
307
308 b = WILC_FW_ACTIVE_SCAN;
309 if (!wilc_wlan_cfg_set(vif, 0, WID_SCAN_TYPE, &b, 1, 0, 0))
310 goto fail;
311
312 b = WILC_FW_SITE_SURVEY_OFF;
313 if (!wilc_wlan_cfg_set(vif, 0, WID_SITE_SURVEY, &b, 1, 0, 0))
314 goto fail;
315
316 hw = 0xffff;
317 cpu_to_le16s(&hw);
318 if (!wilc_wlan_cfg_set(vif, 0, WID_RTS_THRESHOLD, (u8 *)&hw, 2, 0, 0))
319 goto fail;
320
321 hw = 2346;
322 cpu_to_le16s(&hw);
323 if (!wilc_wlan_cfg_set(vif, 0, WID_FRAG_THRESHOLD, (u8 *)&hw, 2, 0, 0))
324 goto fail;
325
326 b = 0;
327 if (!wilc_wlan_cfg_set(vif, 0, WID_BCAST_SSID, &b, 1, 0, 0))
328 goto fail;
329
330 b = 1;
331 if (!wilc_wlan_cfg_set(vif, 0, WID_QOS_ENABLE, &b, 1, 0, 0))
332 goto fail;
333
334 b = WILC_FW_NO_POWERSAVE;
335 if (!wilc_wlan_cfg_set(vif, 0, WID_POWER_MANAGEMENT, &b, 1, 0, 0))
336 goto fail;
337
338 b = WILC_FW_SEC_NO;
339 if (!wilc_wlan_cfg_set(vif, 0, WID_11I_MODE, &b, 1, 0, 0))
340 goto fail;
341
342 b = WILC_FW_AUTH_OPEN_SYSTEM;
343 if (!wilc_wlan_cfg_set(vif, 0, WID_AUTH_TYPE, &b, 1, 0, 0))
344 goto fail;
345
346 b = 3;
347 if (!wilc_wlan_cfg_set(vif, 0, WID_LISTEN_INTERVAL, &b, 1, 0, 0))
348 goto fail;
349
350 b = 3;
351 if (!wilc_wlan_cfg_set(vif, 0, WID_DTIM_PERIOD, &b, 1, 0, 0))
352 goto fail;
353
354 b = WILC_FW_ACK_POLICY_NORMAL;
355 if (!wilc_wlan_cfg_set(vif, 0, WID_ACK_POLICY, &b, 1, 0, 0))
356 goto fail;
357
358 b = 0;
359 if (!wilc_wlan_cfg_set(vif, 0, WID_USER_CONTROL_ON_TX_POWER, &b, 1,
360 0, 0))
361 goto fail;
362
363 b = 48;
364 if (!wilc_wlan_cfg_set(vif, 0, WID_TX_POWER_LEVEL_11A, &b, 1, 0, 0))
365 goto fail;
366
367 b = 28;
368 if (!wilc_wlan_cfg_set(vif, 0, WID_TX_POWER_LEVEL_11B, &b, 1, 0, 0))
369 goto fail;
370
371 hw = 100;
372 cpu_to_le16s(&hw);
373 if (!wilc_wlan_cfg_set(vif, 0, WID_BEACON_INTERVAL, (u8 *)&hw, 2, 0, 0))
374 goto fail;
375
376 b = WILC_FW_REKEY_POLICY_DISABLE;
377 if (!wilc_wlan_cfg_set(vif, 0, WID_REKEY_POLICY, &b, 1, 0, 0))
378 goto fail;
379
380 w = 84600;
381 cpu_to_le32s(&w);
382 if (!wilc_wlan_cfg_set(vif, 0, WID_REKEY_PERIOD, (u8 *)&w, 4, 0, 0))
383 goto fail;
384
385 w = 500;
386 cpu_to_le32s(&w);
387 if (!wilc_wlan_cfg_set(vif, 0, WID_REKEY_PACKET_COUNT, (u8 *)&w, 4, 0,
388 0))
389 goto fail;
390
391 b = 1;
392 if (!wilc_wlan_cfg_set(vif, 0, WID_SHORT_SLOT_ALLOWED, &b, 1, 0,
393 0))
394 goto fail;
395
396 b = WILC_FW_ERP_PROT_SELF_CTS;
397 if (!wilc_wlan_cfg_set(vif, 0, WID_11N_ERP_PROT_TYPE, &b, 1, 0, 0))
398 goto fail;
399
400 b = 1;
401 if (!wilc_wlan_cfg_set(vif, 0, WID_11N_ENABLE, &b, 1, 0, 0))
402 goto fail;
403
404 b = WILC_FW_11N_OP_MODE_HT_MIXED;
405 if (!wilc_wlan_cfg_set(vif, 0, WID_11N_OPERATING_MODE, &b, 1, 0, 0))
406 goto fail;
407
408 b = 1;
409 if (!wilc_wlan_cfg_set(vif, 0, WID_11N_TXOP_PROT_DISABLE, &b, 1, 0, 0))
410 goto fail;
411
412 b = WILC_FW_OBBS_NONHT_DETECT_PROTECT_REPORT;
413 if (!wilc_wlan_cfg_set(vif, 0, WID_11N_OBSS_NONHT_DETECTION, &b, 1,
414 0, 0))
415 goto fail;
416
417 b = WILC_FW_HT_PROT_RTS_CTS_NONHT;
418 if (!wilc_wlan_cfg_set(vif, 0, WID_11N_HT_PROT_TYPE, &b, 1, 0, 0))
419 goto fail;
420
421 b = 0;
422 if (!wilc_wlan_cfg_set(vif, 0, WID_11N_RIFS_PROT_ENABLE, &b, 1, 0,
423 0))
424 goto fail;
425
426 b = 7;
427 if (!wilc_wlan_cfg_set(vif, 0, WID_11N_CURRENT_TX_MCS, &b, 1, 0, 0))
428 goto fail;
429
430 b = 1;
431 if (!wilc_wlan_cfg_set(vif, 0, WID_11N_IMMEDIATE_BA_ENABLED, &b, 1,
432 1, 0))
433 goto fail;
434
435 return 0;
436
437fail:
438 return -EINVAL;
439}
440
441static void wlan_deinitialize_threads(struct net_device *dev)
442{
443 struct wilc_vif *vif = netdev_priv(dev);
444 struct wilc *wl = vif->wilc;
445
446 wl->close = 1;
447
448 complete(&wl->txq_event);
449
450 if (wl->txq_thread) {
451 kthread_stop(wl->txq_thread);
452 wl->txq_thread = NULL;
453 }
454}
455
456static void wilc_wlan_deinitialize(struct net_device *dev)
457{
458 struct wilc_vif *vif = netdev_priv(dev);
459 struct wilc *wl = vif->wilc;
460
461 if (!wl) {
462 netdev_err(dev, "wl is NULL\n");
463 return;
464 }
465
466 if (wl->initialized) {
467 netdev_info(dev, "Deinitializing wilc1000...\n");
468
469 if (!wl->dev_irq_num &&
470 wl->hif_func->disable_interrupt) {
471 mutex_lock(&wl->hif_cs);
472 wl->hif_func->disable_interrupt(wl);
473 mutex_unlock(&wl->hif_cs);
474 }
475 complete(&wl->txq_event);
476
477 wlan_deinitialize_threads(dev);
478 deinit_irq(dev);
479
480 wilc_wlan_stop(wl, vif);
481 wilc_wlan_cleanup(dev);
482
483 wl->initialized = false;
484
485 netdev_dbg(dev, "wilc1000 deinitialization Done\n");
486 } else {
487 netdev_dbg(dev, "wilc1000 is not initialized\n");
488 }
489}
490
491static int wlan_initialize_threads(struct net_device *dev)
492{
493 struct wilc_vif *vif = netdev_priv(dev);
494 struct wilc *wilc = vif->wilc;
495
496 wilc->txq_thread = kthread_run(wilc_txq_task, (void *)wilc,
497 "%s-tx", dev->name);
498 if (IS_ERR(wilc->txq_thread)) {
499 netdev_err(dev, "couldn't create TXQ thread\n");
500 wilc->close = 1;
501 return PTR_ERR(wilc->txq_thread);
502 }
503 wait_for_completion(&wilc->txq_thread_started);
504
505 return 0;
506}
507
508static int wilc_wlan_initialize(struct net_device *dev, struct wilc_vif *vif)
509{
510 int ret = 0;
511 struct wilc *wl = vif->wilc;
512
513 if (!wl->initialized) {
514 wl->mac_status = WILC_MAC_STATUS_INIT;
515 wl->close = 0;
516
517 ret = wilc_wlan_init(dev);
518 if (ret)
519 return ret;
520
521 ret = wlan_initialize_threads(dev);
522 if (ret)
523 goto fail_wilc_wlan;
524
525 if (wl->dev_irq_num && init_irq(dev)) {
526 ret = -EIO;
527 goto fail_threads;
528 }
529
530 if (!wl->dev_irq_num &&
531 wl->hif_func->enable_interrupt &&
532 wl->hif_func->enable_interrupt(wl)) {
533 ret = -EIO;
534 goto fail_irq_init;
535 }
536
537 ret = wilc_wlan_get_firmware(dev);
538 if (ret)
539 goto fail_irq_enable;
540
541 ret = wilc_firmware_download(dev);
542 if (ret)
543 goto fail_irq_enable;
544
545 ret = wilc_start_firmware(dev);
546 if (ret)
547 goto fail_irq_enable;
548
549 if (wilc_wlan_cfg_get(vif, 1, WID_FIRMWARE_VERSION, 1, 0)) {
550 int size;
551 char firmware_ver[WILC_MAX_FW_VERSION_STR_SIZE];
552
553 size = wilc_wlan_cfg_get_val(wl, WID_FIRMWARE_VERSION,
554 firmware_ver,
555 sizeof(firmware_ver));
556 firmware_ver[size] = '\0';
557 netdev_dbg(dev, "Firmware Ver = %s\n", firmware_ver);
558 }
559
560 ret = wilc_init_fw_config(dev, vif);
561 if (ret) {
562 netdev_err(dev, "Failed to configure firmware\n");
563 goto fail_fw_start;
564 }
565 wl->initialized = true;
566 return 0;
567
568fail_fw_start:
569 wilc_wlan_stop(wl, vif);
570
571fail_irq_enable:
572 if (!wl->dev_irq_num &&
573 wl->hif_func->disable_interrupt)
574 wl->hif_func->disable_interrupt(wl);
575fail_irq_init:
576 if (wl->dev_irq_num)
577 deinit_irq(dev);
578fail_threads:
579 wlan_deinitialize_threads(dev);
580fail_wilc_wlan:
581 wilc_wlan_cleanup(dev);
582 netdev_err(dev, "WLAN initialization FAILED\n");
583 } else {
584 netdev_dbg(dev, "wilc1000 already initialized\n");
585 }
586 return ret;
587}
588
589static int mac_init_fn(struct net_device *ndev)
590{
591 netif_start_queue(ndev);
592 netif_stop_queue(ndev);
593
594 return 0;
595}
596
597static int wilc_mac_open(struct net_device *ndev)
598{
599 struct wilc_vif *vif = netdev_priv(ndev);
600 struct wilc *wl = vif->wilc;
601 int ret = 0;
602 struct mgmt_frame_regs mgmt_regs = {};
603
604 if (!wl || !wl->dev) {
605 netdev_err(ndev, "device not ready\n");
606 return -ENODEV;
607 }
608
609 netdev_dbg(ndev, "MAC OPEN[%p]\n", ndev);
610
611 ret = wilc_init_host_int(ndev);
612 if (ret)
613 return ret;
614
615 ret = wilc_wlan_initialize(ndev, vif);
616 if (ret) {
617 wilc_deinit_host_int(ndev);
618 return ret;
619 }
620
621 wilc_set_operation_mode(vif, wilc_get_vif_idx(vif), vif->iftype,
622 vif->idx);
623
624 netdev_dbg(ndev, "Mac address: %pM\n", ndev->dev_addr);
625 ret = wilc_set_mac_address(vif, ndev->dev_addr);
626 if (ret) {
627 netdev_err(ndev, "Failed to enforce MAC address in chip");
628 wilc_deinit_host_int(ndev);
629 if (!wl->open_ifcs)
630 wilc_wlan_deinitialize(ndev);
631 return ret;
632 }
633
634 mgmt_regs.interface_stypes = vif->mgmt_reg_stypes;
635 /* so we detect a change */
636 vif->mgmt_reg_stypes = 0;
637 wilc_update_mgmt_frame_registrations(vif->ndev->ieee80211_ptr->wiphy,
638 vif->ndev->ieee80211_ptr,
639 &mgmt_regs);
640 netif_wake_queue(ndev);
641 wl->open_ifcs++;
642 vif->mac_opened = 1;
643 return 0;
644}
645
646static struct net_device_stats *mac_stats(struct net_device *dev)
647{
648 struct wilc_vif *vif = netdev_priv(dev);
649
650 return &vif->netstats;
651}
652
653static int wilc_set_mac_addr(struct net_device *dev, void *p)
654{
655 int result;
656 struct wilc_vif *vif = netdev_priv(dev);
657 struct wilc *wilc = vif->wilc;
658 struct sockaddr *addr = (struct sockaddr *)p;
659 unsigned char mac_addr[ETH_ALEN];
660 struct wilc_vif *tmp_vif;
661 int srcu_idx;
662
663 if (!is_valid_ether_addr(addr->sa_data))
664 return -EADDRNOTAVAIL;
665
666 if (!vif->mac_opened) {
667 eth_commit_mac_addr_change(dev, p);
668 return 0;
669 }
670
671 /* Verify MAC Address is not already in use: */
672
673 srcu_idx = srcu_read_lock(&wilc->srcu);
674 wilc_for_each_vif(wilc, tmp_vif) {
675 wilc_get_mac_address(tmp_vif, mac_addr);
676 if (ether_addr_equal(addr->sa_data, mac_addr)) {
677 if (vif != tmp_vif) {
678 srcu_read_unlock(&wilc->srcu, srcu_idx);
679 return -EADDRNOTAVAIL;
680 }
681 srcu_read_unlock(&wilc->srcu, srcu_idx);
682 return 0;
683 }
684 }
685 srcu_read_unlock(&wilc->srcu, srcu_idx);
686
687 result = wilc_set_mac_address(vif, addr->sa_data);
688 if (result)
689 return result;
690
691 eth_commit_mac_addr_change(dev, p);
692 return result;
693}
694
695static void wilc_set_multicast_list(struct net_device *dev)
696{
697 struct netdev_hw_addr *ha;
698 struct wilc_vif *vif = netdev_priv(dev);
699 int i;
700 u8 *mc_list;
701 u8 *cur_mc;
702
703 if (dev->flags & IFF_PROMISC)
704 return;
705
706 if (dev->flags & IFF_ALLMULTI ||
707 dev->mc.count > WILC_MULTICAST_TABLE_SIZE) {
708 wilc_setup_multicast_filter(vif, 0, 0, NULL);
709 return;
710 }
711
712 if (dev->mc.count == 0) {
713 wilc_setup_multicast_filter(vif, 1, 0, NULL);
714 return;
715 }
716
717 mc_list = kmalloc_array(dev->mc.count, ETH_ALEN, GFP_ATOMIC);
718 if (!mc_list)
719 return;
720
721 cur_mc = mc_list;
722 i = 0;
723 netdev_for_each_mc_addr(ha, dev) {
724 memcpy(cur_mc, ha->addr, ETH_ALEN);
725 netdev_dbg(dev, "Entry[%d]: %pM\n", i, cur_mc);
726 i++;
727 cur_mc += ETH_ALEN;
728 }
729
730 if (wilc_setup_multicast_filter(vif, 1, dev->mc.count, mc_list))
731 kfree(mc_list);
732}
733
734static void wilc_tx_complete(void *priv, int status)
735{
736 struct tx_complete_data *pv_data = priv;
737
738 dev_kfree_skb(pv_data->skb);
739 kfree(pv_data);
740}
741
742netdev_tx_t wilc_mac_xmit(struct sk_buff *skb, struct net_device *ndev)
743{
744 struct wilc_vif *vif = netdev_priv(ndev);
745 struct wilc *wilc = vif->wilc;
746 struct tx_complete_data *tx_data = NULL;
747 int queue_count;
748
749 if (skb->dev != ndev) {
750 netdev_err(ndev, "Packet not destined to this device\n");
751 dev_kfree_skb(skb);
752 return NETDEV_TX_OK;
753 }
754
755 tx_data = kmalloc(sizeof(*tx_data), GFP_ATOMIC);
756 if (!tx_data) {
757 dev_kfree_skb(skb);
758 netif_wake_queue(ndev);
759 return NETDEV_TX_OK;
760 }
761
762 tx_data->buff = skb->data;
763 tx_data->size = skb->len;
764 tx_data->skb = skb;
765
766 vif->netstats.tx_packets++;
767 vif->netstats.tx_bytes += tx_data->size;
768 queue_count = wilc_wlan_txq_add_net_pkt(ndev, tx_data,
769 tx_data->buff, tx_data->size,
770 wilc_tx_complete);
771
772 if (queue_count > FLOW_CONTROL_UPPER_THRESHOLD) {
773 int srcu_idx;
774 struct wilc_vif *vif;
775
776 srcu_idx = srcu_read_lock(&wilc->srcu);
777 wilc_for_each_vif(wilc, vif) {
778 if (vif->mac_opened)
779 netif_stop_queue(vif->ndev);
780 }
781 srcu_read_unlock(&wilc->srcu, srcu_idx);
782 }
783
784 return NETDEV_TX_OK;
785}
786
787static int wilc_mac_close(struct net_device *ndev)
788{
789 struct wilc_vif *vif = netdev_priv(ndev);
790 struct wilc *wl = vif->wilc;
791
792 netdev_dbg(ndev, "Mac close\n");
793
794 if (wl->open_ifcs > 0)
795 wl->open_ifcs--;
796 else
797 return 0;
798
799 if (vif->ndev) {
800 netif_stop_queue(vif->ndev);
801
802 wilc_handle_disconnect(vif);
803 wilc_deinit_host_int(vif->ndev);
804 }
805
806 if (wl->open_ifcs == 0) {
807 netdev_dbg(ndev, "Deinitializing wilc1000\n");
808 wl->close = 1;
809 wilc_wlan_deinitialize(ndev);
810 }
811
812 vif->mac_opened = 0;
813
814 return 0;
815}
816
817void wilc_frmw_to_host(struct wilc *wilc, u8 *buff, u32 size,
818 u32 pkt_offset)
819{
820 unsigned char *buff_to_send = NULL;
821 struct net_device *wilc_netdev;
822 unsigned int frame_len = 0;
823 struct wilc_vif *vif;
824 struct sk_buff *skb;
825 int srcu_idx;
826 int stats;
827
828 if (!wilc)
829 return;
830
831 srcu_idx = srcu_read_lock(&wilc->srcu);
832 wilc_netdev = get_if_handler(wilc, buff);
833 if (!wilc_netdev)
834 goto out;
835
836 buff += pkt_offset;
837 vif = netdev_priv(wilc_netdev);
838
839 if (size > 0) {
840 frame_len = size;
841 buff_to_send = buff;
842
843 skb = dev_alloc_skb(frame_len);
844 if (!skb)
845 goto out;
846
847 skb->dev = wilc_netdev;
848
849 skb_put_data(skb, buff_to_send, frame_len);
850
851 skb->protocol = eth_type_trans(skb, wilc_netdev);
852 vif->netstats.rx_packets++;
853 vif->netstats.rx_bytes += frame_len;
854 skb->ip_summed = CHECKSUM_UNNECESSARY;
855 stats = netif_rx(skb);
856 netdev_dbg(wilc_netdev, "netif_rx ret value is: %d\n", stats);
857 }
858out:
859 srcu_read_unlock(&wilc->srcu, srcu_idx);
860}
861
862void wilc_wfi_mgmt_rx(struct wilc *wilc, u8 *buff, u32 size, bool is_auth)
863{
864 int srcu_idx;
865 struct wilc_vif *vif;
866
867 srcu_idx = srcu_read_lock(&wilc->srcu);
868 wilc_for_each_vif(wilc, vif) {
869 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buff;
870 u16 type = le16_to_cpup((__le16 *)buff);
871 u32 type_bit = BIT(type >> 4);
872 u32 auth_bit = BIT(IEEE80211_STYPE_AUTH >> 4);
873
874 if ((vif->mgmt_reg_stypes & auth_bit &&
875 ieee80211_is_auth(mgmt->frame_control)) &&
876 vif->iftype == WILC_STATION_MODE && is_auth) {
877 wilc_wfi_mgmt_frame_rx(vif, buff, size);
878 break;
879 }
880
881 if (vif->priv.p2p_listen_state &&
882 vif->mgmt_reg_stypes & type_bit)
883 wilc_wfi_p2p_rx(vif, buff, size);
884
885 if (vif->monitor_flag)
886 wilc_wfi_monitor_rx(wilc->monitor_dev, buff, size);
887 }
888 srcu_read_unlock(&wilc->srcu, srcu_idx);
889}
890
891static const struct net_device_ops wilc_netdev_ops = {
892 .ndo_init = mac_init_fn,
893 .ndo_open = wilc_mac_open,
894 .ndo_stop = wilc_mac_close,
895 .ndo_set_mac_address = wilc_set_mac_addr,
896 .ndo_start_xmit = wilc_mac_xmit,
897 .ndo_get_stats = mac_stats,
898 .ndo_set_rx_mode = wilc_set_multicast_list,
899};
900
901void wilc_netdev_cleanup(struct wilc *wilc)
902{
903 struct wilc_vif *vif, *vif_tmp;
904
905 if (!wilc)
906 return;
907
908 if (wilc->firmware) {
909 release_firmware(wilc->firmware);
910 wilc->firmware = NULL;
911 }
912
913 list_for_each_entry_safe(vif, vif_tmp, &wilc->vif_list, list) {
914 mutex_lock(&wilc->vif_mutex);
915 list_del_rcu(&vif->list);
916 wilc->vif_num--;
917 mutex_unlock(&wilc->vif_mutex);
918 synchronize_srcu(&wilc->srcu);
919 if (vif->ndev)
920 unregister_netdev(vif->ndev);
921 }
922
923 wilc_wfi_deinit_mon_interface(wilc, false);
924 destroy_workqueue(wilc->hif_workqueue);
925
926 wilc_wlan_cfg_deinit(wilc);
927 wlan_deinit_locks(wilc);
928}
929EXPORT_SYMBOL_GPL(wilc_netdev_cleanup);
930
931static u8 wilc_get_available_idx(struct wilc *wl)
932{
933 int idx = 0;
934 struct wilc_vif *vif;
935 int srcu_idx;
936
937 srcu_idx = srcu_read_lock(&wl->srcu);
938 wilc_for_each_vif(wl, vif) {
939 if (vif->idx == 0)
940 idx = 1;
941 else
942 idx = 0;
943 }
944 srcu_read_unlock(&wl->srcu, srcu_idx);
945 return idx;
946}
947
948struct wilc_vif *wilc_netdev_ifc_init(struct wilc *wl, const char *name,
949 int vif_type, enum nl80211_iftype type,
950 bool rtnl_locked)
951{
952 u8 mac_address[ETH_ALEN];
953 struct net_device *ndev;
954 struct wilc_vif *vif;
955 int ret;
956
957 ndev = alloc_etherdev(sizeof(*vif));
958 if (!ndev)
959 return ERR_PTR(-ENOMEM);
960
961 vif = netdev_priv(ndev);
962 ndev->ieee80211_ptr = &vif->priv.wdev;
963 strcpy(ndev->name, name);
964 vif->wilc = wl;
965 vif->ndev = ndev;
966 ndev->ml_priv = vif;
967
968 ndev->netdev_ops = &wilc_netdev_ops;
969
970 SET_NETDEV_DEV(ndev, wiphy_dev(wl->wiphy));
971
972 vif->priv.wdev.wiphy = wl->wiphy;
973 vif->priv.wdev.netdev = ndev;
974 vif->priv.wdev.iftype = type;
975 vif->priv.dev = ndev;
976
977 ndev->needs_free_netdev = true;
978 vif->iftype = vif_type;
979 vif->idx = wilc_get_available_idx(wl);
980 vif->mac_opened = 0;
981
982 memcpy(mac_address, wl->nv_mac_address, ETH_ALEN);
983 /* WILC firmware uses locally administered MAC address for the
984 * second virtual interface (bit 1 of first byte set), but
985 * since it is possibly not loaded/running yet, reproduce this behavior
986 * in the driver during interface creation.
987 */
988 if (vif->idx)
989 mac_address[0] |= 0x2;
990
991 eth_hw_addr_set(vif->ndev, mac_address);
992
993 mutex_lock(&wl->vif_mutex);
994 list_add_tail_rcu(&vif->list, &wl->vif_list);
995 wl->vif_num += 1;
996 mutex_unlock(&wl->vif_mutex);
997 synchronize_srcu(&wl->srcu);
998
999 if (rtnl_locked)
1000 ret = cfg80211_register_netdevice(ndev);
1001 else
1002 ret = register_netdev(ndev);
1003
1004 if (ret) {
1005 ret = -EFAULT;
1006 goto error_remove_vif;
1007 }
1008
1009 return vif;
1010
1011error_remove_vif:
1012 mutex_lock(&wl->vif_mutex);
1013 list_del_rcu(&vif->list);
1014 wl->vif_num -= 1;
1015 mutex_unlock(&wl->vif_mutex);
1016 synchronize_srcu(&wl->srcu);
1017 free_netdev(ndev);
1018 return ERR_PTR(ret);
1019}
1020EXPORT_SYMBOL_GPL(wilc_netdev_ifc_init);
1021
1022MODULE_DESCRIPTION("Atmel WILC1000 core wireless driver");
1023MODULE_LICENSE("GPL");
1024MODULE_FIRMWARE(WILC1000_FW(WILC1000_API_VER));
1025MODULE_FIRMWARE(WILC3000_FW(WILC3000_API_VER));