1 /*
2 * Marvell Wireless LAN device driver: major functions
3 *
4 * Copyright (C) 2011-2014, Marvell International Ltd.
5 *
6 * This software file (the "File") is distributed by Marvell International
7 * Ltd. under the terms of the GNU General Public License Version 2, June 1991
8 * (the "License"). You may use, redistribute and/or modify this File in
9 * accordance with the terms and conditions of the License, a copy of which
10 * is available by writing to the Free Software Foundation, Inc.,
11 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
12 * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
13 *
14 * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
16 * ARE EXPRESSLY DISCLAIMED. The License provides additional details about
17 * this warranty disclaimer.
18 */
19
20 #include "main.h"
21 #include "wmm.h"
22 #include "cfg80211.h"
23 #include "11n.h"
24
25 #define VERSION "1.0"
26
27 const char driver_version[] = "mwifiex " VERSION " (%s) ";
28 static char *cal_data_cfg;
29 module_param(cal_data_cfg, charp, 0);
30
31 static unsigned short driver_mode;
32 module_param(driver_mode, ushort, 0);
33 MODULE_PARM_DESC(driver_mode,
34 "station=0x1(default), ap-sta=0x3, station-p2p=0x5, ap-sta-p2p=0x7");
35
36 /*
37 * This function registers the device and performs all the necessary
38 * initializations.
39 *
40 * The following initialization operations are performed -
41 * - Allocate adapter structure
42 * - Save interface specific operations table in adapter
43 * - Call interface specific initialization routine
44 * - Allocate private structures
45 * - Set default adapter structure parameters
46 * - Initialize locks
47 *
48 * In case of any errors during inittialization, this function also ensures
49 * proper cleanup before exiting.
50 */
mwifiex_register(void * card,struct mwifiex_if_ops * if_ops,void ** padapter)51 static int mwifiex_register(void *card, struct mwifiex_if_ops *if_ops,
52 void **padapter)
53 {
54 struct mwifiex_adapter *adapter;
55 int i;
56
57 adapter = kzalloc(sizeof(struct mwifiex_adapter), GFP_KERNEL);
58 if (!adapter)
59 return -ENOMEM;
60
61 *padapter = adapter;
62 adapter->card = card;
63
64 /* Save interface specific operations in adapter */
65 memmove(&adapter->if_ops, if_ops, sizeof(struct mwifiex_if_ops));
66
67 /* card specific initialization has been deferred until now .. */
68 if (adapter->if_ops.init_if)
69 if (adapter->if_ops.init_if(adapter))
70 goto error;
71
72 adapter->priv_num = 0;
73
74 for (i = 0; i < MWIFIEX_MAX_BSS_NUM; i++) {
75 /* Allocate memory for private structure */
76 adapter->priv[i] =
77 kzalloc(sizeof(struct mwifiex_private), GFP_KERNEL);
78 if (!adapter->priv[i])
79 goto error;
80
81 adapter->priv[i]->adapter = adapter;
82 adapter->priv_num++;
83 }
84 mwifiex_init_lock_list(adapter);
85
86 setup_timer(&adapter->cmd_timer, mwifiex_cmd_timeout_func,
87 (unsigned long)adapter);
88
89 return 0;
90
91 error:
92 dev_dbg(adapter->dev, "info: leave mwifiex_register with error\n");
93
94 for (i = 0; i < adapter->priv_num; i++)
95 kfree(adapter->priv[i]);
96
97 kfree(adapter);
98
99 return -1;
100 }
101
102 /*
103 * This function unregisters the device and performs all the necessary
104 * cleanups.
105 *
106 * The following cleanup operations are performed -
107 * - Free the timers
108 * - Free beacon buffers
109 * - Free private structures
110 * - Free adapter structure
111 */
mwifiex_unregister(struct mwifiex_adapter * adapter)112 static int mwifiex_unregister(struct mwifiex_adapter *adapter)
113 {
114 s32 i;
115
116 if (adapter->if_ops.cleanup_if)
117 adapter->if_ops.cleanup_if(adapter);
118
119 del_timer_sync(&adapter->cmd_timer);
120
121 /* Free private structures */
122 for (i = 0; i < adapter->priv_num; i++) {
123 if (adapter->priv[i]) {
124 mwifiex_free_curr_bcn(adapter->priv[i]);
125 kfree(adapter->priv[i]);
126 }
127 }
128
129 vfree(adapter->chan_stats);
130 kfree(adapter);
131 return 0;
132 }
133
mwifiex_queue_main_work(struct mwifiex_adapter * adapter)134 void mwifiex_queue_main_work(struct mwifiex_adapter *adapter)
135 {
136 unsigned long flags;
137
138 spin_lock_irqsave(&adapter->main_proc_lock, flags);
139 if (adapter->mwifiex_processing) {
140 adapter->more_task_flag = true;
141 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
142 } else {
143 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
144 queue_work(adapter->workqueue, &adapter->main_work);
145 }
146 }
147 EXPORT_SYMBOL_GPL(mwifiex_queue_main_work);
148
mwifiex_queue_rx_work(struct mwifiex_adapter * adapter)149 static void mwifiex_queue_rx_work(struct mwifiex_adapter *adapter)
150 {
151 unsigned long flags;
152
153 spin_lock_irqsave(&adapter->rx_proc_lock, flags);
154 if (adapter->rx_processing) {
155 spin_unlock_irqrestore(&adapter->rx_proc_lock, flags);
156 } else {
157 spin_unlock_irqrestore(&adapter->rx_proc_lock, flags);
158 queue_work(adapter->rx_workqueue, &adapter->rx_work);
159 }
160 }
161
mwifiex_process_rx(struct mwifiex_adapter * adapter)162 static int mwifiex_process_rx(struct mwifiex_adapter *adapter)
163 {
164 unsigned long flags;
165 struct sk_buff *skb;
166 struct mwifiex_rxinfo *rx_info;
167
168 spin_lock_irqsave(&adapter->rx_proc_lock, flags);
169 if (adapter->rx_processing || adapter->rx_locked) {
170 spin_unlock_irqrestore(&adapter->rx_proc_lock, flags);
171 goto exit_rx_proc;
172 } else {
173 adapter->rx_processing = true;
174 spin_unlock_irqrestore(&adapter->rx_proc_lock, flags);
175 }
176
177 /* Check for Rx data */
178 while ((skb = skb_dequeue(&adapter->rx_data_q))) {
179 atomic_dec(&adapter->rx_pending);
180 if ((adapter->delay_main_work ||
181 adapter->iface_type == MWIFIEX_USB) &&
182 (atomic_read(&adapter->rx_pending) < LOW_RX_PENDING)) {
183 if (adapter->if_ops.submit_rem_rx_urbs)
184 adapter->if_ops.submit_rem_rx_urbs(adapter);
185 adapter->delay_main_work = false;
186 mwifiex_queue_main_work(adapter);
187 }
188 rx_info = MWIFIEX_SKB_RXCB(skb);
189 if (rx_info->buf_type == MWIFIEX_TYPE_AGGR_DATA) {
190 if (adapter->if_ops.deaggr_pkt)
191 adapter->if_ops.deaggr_pkt(adapter, skb);
192 dev_kfree_skb_any(skb);
193 } else {
194 mwifiex_handle_rx_packet(adapter, skb);
195 }
196 }
197 spin_lock_irqsave(&adapter->rx_proc_lock, flags);
198 adapter->rx_processing = false;
199 spin_unlock_irqrestore(&adapter->rx_proc_lock, flags);
200
201 exit_rx_proc:
202 return 0;
203 }
204
205 /*
206 * The main process.
207 *
208 * This function is the main procedure of the driver and handles various driver
209 * operations. It runs in a loop and provides the core functionalities.
210 *
211 * The main responsibilities of this function are -
212 * - Ensure concurrency control
213 * - Handle pending interrupts and call interrupt handlers
214 * - Wake up the card if required
215 * - Handle command responses and call response handlers
216 * - Handle events and call event handlers
217 * - Execute pending commands
218 * - Transmit pending data packets
219 */
mwifiex_main_process(struct mwifiex_adapter * adapter)220 int mwifiex_main_process(struct mwifiex_adapter *adapter)
221 {
222 int ret = 0;
223 unsigned long flags;
224
225 spin_lock_irqsave(&adapter->main_proc_lock, flags);
226
227 /* Check if already processing */
228 if (adapter->mwifiex_processing || adapter->main_locked) {
229 adapter->more_task_flag = true;
230 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
231 goto exit_main_proc;
232 } else {
233 adapter->mwifiex_processing = true;
234 }
235 process_start:
236 do {
237 adapter->more_task_flag = false;
238 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
239 if ((adapter->hw_status == MWIFIEX_HW_STATUS_CLOSING) ||
240 (adapter->hw_status == MWIFIEX_HW_STATUS_NOT_READY))
241 break;
242
243 /* For non-USB interfaces, If we process interrupts first, it
244 * would increase RX pending even further. Avoid this by
245 * checking if rx_pending has crossed high threshold and
246 * schedule rx work queue and then process interrupts.
247 * For USB interface, there are no interrupts. We already have
248 * HIGH_RX_PENDING check in usb.c
249 */
250 if (atomic_read(&adapter->rx_pending) >= HIGH_RX_PENDING &&
251 adapter->iface_type != MWIFIEX_USB) {
252 adapter->delay_main_work = true;
253 mwifiex_queue_rx_work(adapter);
254 break;
255 }
256
257 /* Handle pending interrupt if any */
258 if (adapter->int_status) {
259 if (adapter->hs_activated)
260 mwifiex_process_hs_config(adapter);
261 if (adapter->if_ops.process_int_status)
262 adapter->if_ops.process_int_status(adapter);
263 }
264
265 if (adapter->rx_work_enabled && adapter->data_received)
266 mwifiex_queue_rx_work(adapter);
267
268 /* Need to wake up the card ? */
269 if ((adapter->ps_state == PS_STATE_SLEEP) &&
270 (adapter->pm_wakeup_card_req &&
271 !adapter->pm_wakeup_fw_try) &&
272 (is_command_pending(adapter) ||
273 !skb_queue_empty(&adapter->tx_data_q) ||
274 !mwifiex_wmm_lists_empty(adapter))) {
275 adapter->pm_wakeup_fw_try = true;
276 mod_timer(&adapter->wakeup_timer, jiffies + (HZ*3));
277 adapter->if_ops.wakeup(adapter);
278 spin_lock_irqsave(&adapter->main_proc_lock, flags);
279 continue;
280 }
281
282 if (IS_CARD_RX_RCVD(adapter)) {
283 adapter->data_received = false;
284 adapter->pm_wakeup_fw_try = false;
285 del_timer(&adapter->wakeup_timer);
286 if (adapter->ps_state == PS_STATE_SLEEP)
287 adapter->ps_state = PS_STATE_AWAKE;
288 } else {
289 /* We have tried to wakeup the card already */
290 if (adapter->pm_wakeup_fw_try)
291 break;
292 if (adapter->ps_state != PS_STATE_AWAKE ||
293 adapter->tx_lock_flag)
294 break;
295
296 if ((!adapter->scan_chan_gap_enabled &&
297 adapter->scan_processing) || adapter->data_sent ||
298 (mwifiex_wmm_lists_empty(adapter) &&
299 skb_queue_empty(&adapter->tx_data_q))) {
300 if (adapter->cmd_sent || adapter->curr_cmd ||
301 (!is_command_pending(adapter)))
302 break;
303 }
304 }
305
306 /* Check for event */
307 if (adapter->event_received) {
308 adapter->event_received = false;
309 mwifiex_process_event(adapter);
310 }
311
312 /* Check for Cmd Resp */
313 if (adapter->cmd_resp_received) {
314 adapter->cmd_resp_received = false;
315 mwifiex_process_cmdresp(adapter);
316
317 /* call mwifiex back when init_fw is done */
318 if (adapter->hw_status == MWIFIEX_HW_STATUS_INIT_DONE) {
319 adapter->hw_status = MWIFIEX_HW_STATUS_READY;
320 mwifiex_init_fw_complete(adapter);
321 }
322 }
323
324 /* Check if we need to confirm Sleep Request
325 received previously */
326 if (adapter->ps_state == PS_STATE_PRE_SLEEP) {
327 if (!adapter->cmd_sent && !adapter->curr_cmd)
328 mwifiex_check_ps_cond(adapter);
329 }
330
331 /* * The ps_state may have been changed during processing of
332 * Sleep Request event.
333 */
334 if ((adapter->ps_state == PS_STATE_SLEEP) ||
335 (adapter->ps_state == PS_STATE_PRE_SLEEP) ||
336 (adapter->ps_state == PS_STATE_SLEEP_CFM) ||
337 adapter->tx_lock_flag){
338 spin_lock_irqsave(&adapter->main_proc_lock, flags);
339 continue;
340 }
341
342 if (!adapter->cmd_sent && !adapter->curr_cmd) {
343 if (mwifiex_exec_next_cmd(adapter) == -1) {
344 ret = -1;
345 break;
346 }
347 }
348
349 if ((adapter->scan_chan_gap_enabled ||
350 !adapter->scan_processing) &&
351 !adapter->data_sent &&
352 !skb_queue_empty(&adapter->tx_data_q)) {
353 mwifiex_process_tx_queue(adapter);
354 if (adapter->hs_activated) {
355 adapter->is_hs_configured = false;
356 mwifiex_hs_activated_event
357 (mwifiex_get_priv
358 (adapter, MWIFIEX_BSS_ROLE_ANY),
359 false);
360 }
361 }
362
363 if ((adapter->scan_chan_gap_enabled ||
364 !adapter->scan_processing) &&
365 !adapter->data_sent && !mwifiex_wmm_lists_empty(adapter)) {
366 mwifiex_wmm_process_tx(adapter);
367 if (adapter->hs_activated) {
368 adapter->is_hs_configured = false;
369 mwifiex_hs_activated_event
370 (mwifiex_get_priv
371 (adapter, MWIFIEX_BSS_ROLE_ANY),
372 false);
373 }
374 }
375
376 if (adapter->delay_null_pkt && !adapter->cmd_sent &&
377 !adapter->curr_cmd && !is_command_pending(adapter) &&
378 (mwifiex_wmm_lists_empty(adapter) &&
379 skb_queue_empty(&adapter->tx_data_q))) {
380 if (!mwifiex_send_null_packet
381 (mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA),
382 MWIFIEX_TxPD_POWER_MGMT_NULL_PACKET |
383 MWIFIEX_TxPD_POWER_MGMT_LAST_PACKET)) {
384 adapter->delay_null_pkt = false;
385 adapter->ps_state = PS_STATE_SLEEP;
386 }
387 break;
388 }
389 spin_lock_irqsave(&adapter->main_proc_lock, flags);
390 } while (true);
391
392 spin_lock_irqsave(&adapter->main_proc_lock, flags);
393 if (adapter->more_task_flag)
394 goto process_start;
395 adapter->mwifiex_processing = false;
396 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
397
398 exit_main_proc:
399 if (adapter->hw_status == MWIFIEX_HW_STATUS_CLOSING)
400 mwifiex_shutdown_drv(adapter);
401 return ret;
402 }
403 EXPORT_SYMBOL_GPL(mwifiex_main_process);
404
405 /*
406 * This function frees the adapter structure.
407 *
408 * Additionally, this closes the netlink socket, frees the timers
409 * and private structures.
410 */
mwifiex_free_adapter(struct mwifiex_adapter * adapter)411 static void mwifiex_free_adapter(struct mwifiex_adapter *adapter)
412 {
413 if (!adapter) {
414 pr_err("%s: adapter is NULL\n", __func__);
415 return;
416 }
417
418 mwifiex_unregister(adapter);
419 pr_debug("info: %s: free adapter\n", __func__);
420 }
421
422 /*
423 * This function cancels all works in the queue and destroys
424 * the main workqueue.
425 */
mwifiex_terminate_workqueue(struct mwifiex_adapter * adapter)426 static void mwifiex_terminate_workqueue(struct mwifiex_adapter *adapter)
427 {
428 flush_workqueue(adapter->workqueue);
429 destroy_workqueue(adapter->workqueue);
430 adapter->workqueue = NULL;
431
432 if (adapter->rx_workqueue) {
433 flush_workqueue(adapter->rx_workqueue);
434 destroy_workqueue(adapter->rx_workqueue);
435 adapter->rx_workqueue = NULL;
436 }
437 }
438
439 /*
440 * This function gets firmware and initializes it.
441 *
442 * The main initialization steps followed are -
443 * - Download the correct firmware to card
444 * - Issue the init commands to firmware
445 */
mwifiex_fw_dpc(const struct firmware * firmware,void * context)446 static void mwifiex_fw_dpc(const struct firmware *firmware, void *context)
447 {
448 int ret;
449 char fmt[64];
450 struct mwifiex_private *priv;
451 struct mwifiex_adapter *adapter = context;
452 struct mwifiex_fw_image fw;
453 struct semaphore *sem = adapter->card_sem;
454 bool init_failed = false;
455 struct wireless_dev *wdev;
456
457 if (!firmware) {
458 dev_err(adapter->dev,
459 "Failed to get firmware %s\n", adapter->fw_name);
460 goto err_dnld_fw;
461 }
462
463 memset(&fw, 0, sizeof(struct mwifiex_fw_image));
464 adapter->firmware = firmware;
465 fw.fw_buf = (u8 *) adapter->firmware->data;
466 fw.fw_len = adapter->firmware->size;
467
468 if (adapter->if_ops.dnld_fw)
469 ret = adapter->if_ops.dnld_fw(adapter, &fw);
470 else
471 ret = mwifiex_dnld_fw(adapter, &fw);
472 if (ret == -1)
473 goto err_dnld_fw;
474
475 dev_notice(adapter->dev, "WLAN FW is active\n");
476
477 if (cal_data_cfg) {
478 if ((request_firmware(&adapter->cal_data, cal_data_cfg,
479 adapter->dev)) < 0)
480 dev_err(adapter->dev,
481 "Cal data request_firmware() failed\n");
482 }
483
484 /* enable host interrupt after fw dnld is successful */
485 if (adapter->if_ops.enable_int) {
486 if (adapter->if_ops.enable_int(adapter))
487 goto err_dnld_fw;
488 }
489
490 adapter->init_wait_q_woken = false;
491 ret = mwifiex_init_fw(adapter);
492 if (ret == -1) {
493 goto err_init_fw;
494 } else if (!ret) {
495 adapter->hw_status = MWIFIEX_HW_STATUS_READY;
496 goto done;
497 }
498 /* Wait for mwifiex_init to complete */
499 wait_event_interruptible(adapter->init_wait_q,
500 adapter->init_wait_q_woken);
501 if (adapter->hw_status != MWIFIEX_HW_STATUS_READY)
502 goto err_init_fw;
503
504 priv = adapter->priv[MWIFIEX_BSS_ROLE_STA];
505 if (mwifiex_register_cfg80211(adapter)) {
506 dev_err(adapter->dev, "cannot register with cfg80211\n");
507 goto err_init_fw;
508 }
509
510 if (mwifiex_init_channel_scan_gap(adapter)) {
511 dev_err(adapter->dev, "could not init channel stats table\n");
512 goto err_init_fw;
513 }
514
515 if (driver_mode) {
516 driver_mode &= MWIFIEX_DRIVER_MODE_BITMASK;
517 driver_mode |= MWIFIEX_DRIVER_MODE_STA;
518 }
519
520 rtnl_lock();
521 /* Create station interface by default */
522 wdev = mwifiex_add_virtual_intf(adapter->wiphy, "mlan%d", NET_NAME_ENUM,
523 NL80211_IFTYPE_STATION, NULL, NULL);
524 if (IS_ERR(wdev)) {
525 dev_err(adapter->dev, "cannot create default STA interface\n");
526 rtnl_unlock();
527 goto err_add_intf;
528 }
529
530 if (driver_mode & MWIFIEX_DRIVER_MODE_UAP) {
531 wdev = mwifiex_add_virtual_intf(adapter->wiphy, "uap%d", NET_NAME_ENUM,
532 NL80211_IFTYPE_AP, NULL, NULL);
533 if (IS_ERR(wdev)) {
534 dev_err(adapter->dev, "cannot create AP interface\n");
535 rtnl_unlock();
536 goto err_add_intf;
537 }
538 }
539
540 if (driver_mode & MWIFIEX_DRIVER_MODE_P2P) {
541 wdev = mwifiex_add_virtual_intf(adapter->wiphy, "p2p%d", NET_NAME_ENUM,
542 NL80211_IFTYPE_P2P_CLIENT, NULL,
543 NULL);
544 if (IS_ERR(wdev)) {
545 dev_err(adapter->dev,
546 "cannot create p2p client interface\n");
547 rtnl_unlock();
548 goto err_add_intf;
549 }
550 }
551 rtnl_unlock();
552
553 mwifiex_drv_get_driver_version(adapter, fmt, sizeof(fmt) - 1);
554 dev_notice(adapter->dev, "driver_version = %s\n", fmt);
555 goto done;
556
557 err_add_intf:
558 wiphy_unregister(adapter->wiphy);
559 wiphy_free(adapter->wiphy);
560 err_init_fw:
561 if (adapter->if_ops.disable_int)
562 adapter->if_ops.disable_int(adapter);
563 err_dnld_fw:
564 pr_debug("info: %s: unregister device\n", __func__);
565 if (adapter->if_ops.unregister_dev)
566 adapter->if_ops.unregister_dev(adapter);
567
568 if (adapter->hw_status == MWIFIEX_HW_STATUS_READY) {
569 pr_debug("info: %s: shutdown mwifiex\n", __func__);
570 adapter->init_wait_q_woken = false;
571
572 if (mwifiex_shutdown_drv(adapter) == -EINPROGRESS)
573 wait_event_interruptible(adapter->init_wait_q,
574 adapter->init_wait_q_woken);
575 }
576 adapter->surprise_removed = true;
577 mwifiex_terminate_workqueue(adapter);
578 init_failed = true;
579 done:
580 if (adapter->cal_data) {
581 release_firmware(adapter->cal_data);
582 adapter->cal_data = NULL;
583 }
584 if (adapter->firmware) {
585 release_firmware(adapter->firmware);
586 adapter->firmware = NULL;
587 }
588 if (init_failed)
589 mwifiex_free_adapter(adapter);
590 up(sem);
591 return;
592 }
593
594 /*
595 * This function initializes the hardware and gets firmware.
596 */
mwifiex_init_hw_fw(struct mwifiex_adapter * adapter)597 static int mwifiex_init_hw_fw(struct mwifiex_adapter *adapter)
598 {
599 int ret;
600
601 ret = request_firmware_nowait(THIS_MODULE, 1, adapter->fw_name,
602 adapter->dev, GFP_KERNEL, adapter,
603 mwifiex_fw_dpc);
604 if (ret < 0)
605 dev_err(adapter->dev,
606 "request_firmware_nowait() returned error %d\n", ret);
607 return ret;
608 }
609
610 /*
611 * CFG802.11 network device handler for open.
612 *
613 * Starts the data queue.
614 */
615 static int
mwifiex_open(struct net_device * dev)616 mwifiex_open(struct net_device *dev)
617 {
618 netif_carrier_off(dev);
619
620 return 0;
621 }
622
623 /*
624 * CFG802.11 network device handler for close.
625 */
626 static int
mwifiex_close(struct net_device * dev)627 mwifiex_close(struct net_device *dev)
628 {
629 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
630
631 if (priv->scan_request) {
632 dev_dbg(priv->adapter->dev, "aborting scan on ndo_stop\n");
633 cfg80211_scan_done(priv->scan_request, 1);
634 priv->scan_request = NULL;
635 priv->scan_aborting = true;
636 }
637
638 return 0;
639 }
640
641 /*
642 * Add buffer into wmm tx queue and queue work to transmit it.
643 */
mwifiex_queue_tx_pkt(struct mwifiex_private * priv,struct sk_buff * skb)644 int mwifiex_queue_tx_pkt(struct mwifiex_private *priv, struct sk_buff *skb)
645 {
646 struct netdev_queue *txq;
647 int index = mwifiex_1d_to_wmm_queue[skb->priority];
648
649 if (atomic_inc_return(&priv->wmm_tx_pending[index]) >= MAX_TX_PENDING) {
650 txq = netdev_get_tx_queue(priv->netdev, index);
651 if (!netif_tx_queue_stopped(txq)) {
652 netif_tx_stop_queue(txq);
653 dev_dbg(priv->adapter->dev, "stop queue: %d\n", index);
654 }
655 }
656
657 atomic_inc(&priv->adapter->tx_pending);
658 mwifiex_wmm_add_buf_txqueue(priv, skb);
659
660 mwifiex_queue_main_work(priv->adapter);
661
662 return 0;
663 }
664
665 struct sk_buff *
mwifiex_clone_skb_for_tx_status(struct mwifiex_private * priv,struct sk_buff * skb,u8 flag,u64 * cookie)666 mwifiex_clone_skb_for_tx_status(struct mwifiex_private *priv,
667 struct sk_buff *skb, u8 flag, u64 *cookie)
668 {
669 struct sk_buff *orig_skb = skb;
670 struct mwifiex_txinfo *tx_info, *orig_tx_info;
671
672 skb = skb_clone(skb, GFP_ATOMIC);
673 if (skb) {
674 unsigned long flags;
675 int id;
676
677 spin_lock_irqsave(&priv->ack_status_lock, flags);
678 id = idr_alloc(&priv->ack_status_frames, orig_skb,
679 1, 0xff, GFP_ATOMIC);
680 spin_unlock_irqrestore(&priv->ack_status_lock, flags);
681
682 if (id >= 0) {
683 tx_info = MWIFIEX_SKB_TXCB(skb);
684 tx_info->ack_frame_id = id;
685 tx_info->flags |= flag;
686 orig_tx_info = MWIFIEX_SKB_TXCB(orig_skb);
687 orig_tx_info->ack_frame_id = id;
688 orig_tx_info->flags |= flag;
689
690 if (flag == MWIFIEX_BUF_FLAG_ACTION_TX_STATUS && cookie)
691 orig_tx_info->cookie = *cookie;
692
693 } else if (skb_shared(skb)) {
694 kfree_skb(orig_skb);
695 } else {
696 kfree_skb(skb);
697 skb = orig_skb;
698 }
699 } else {
700 /* couldn't clone -- lose tx status ... */
701 skb = orig_skb;
702 }
703
704 return skb;
705 }
706
707 /*
708 * CFG802.11 network device handler for data transmission.
709 */
710 static int
mwifiex_hard_start_xmit(struct sk_buff * skb,struct net_device * dev)711 mwifiex_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
712 {
713 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
714 struct sk_buff *new_skb;
715 struct mwifiex_txinfo *tx_info;
716 bool multicast;
717
718 dev_dbg(priv->adapter->dev, "data: %lu BSS(%d-%d): Data <= kernel\n",
719 jiffies, priv->bss_type, priv->bss_num);
720
721 if (priv->adapter->surprise_removed) {
722 kfree_skb(skb);
723 priv->stats.tx_dropped++;
724 return 0;
725 }
726 if (!skb->len || (skb->len > ETH_FRAME_LEN)) {
727 dev_err(priv->adapter->dev, "Tx: bad skb len %d\n", skb->len);
728 kfree_skb(skb);
729 priv->stats.tx_dropped++;
730 return 0;
731 }
732 if (skb_headroom(skb) < MWIFIEX_MIN_DATA_HEADER_LEN) {
733 dev_dbg(priv->adapter->dev,
734 "data: Tx: insufficient skb headroom %d\n",
735 skb_headroom(skb));
736 /* Insufficient skb headroom - allocate a new skb */
737 new_skb =
738 skb_realloc_headroom(skb, MWIFIEX_MIN_DATA_HEADER_LEN);
739 if (unlikely(!new_skb)) {
740 dev_err(priv->adapter->dev, "Tx: cannot alloca new_skb\n");
741 kfree_skb(skb);
742 priv->stats.tx_dropped++;
743 return 0;
744 }
745 kfree_skb(skb);
746 skb = new_skb;
747 dev_dbg(priv->adapter->dev, "info: new skb headroomd %d\n",
748 skb_headroom(skb));
749 }
750
751 tx_info = MWIFIEX_SKB_TXCB(skb);
752 memset(tx_info, 0, sizeof(*tx_info));
753 tx_info->bss_num = priv->bss_num;
754 tx_info->bss_type = priv->bss_type;
755 tx_info->pkt_len = skb->len;
756
757 multicast = is_multicast_ether_addr(skb->data);
758
759 if (unlikely(!multicast && skb->sk &&
760 skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS &&
761 priv->adapter->fw_api_ver == MWIFIEX_FW_V15))
762 skb = mwifiex_clone_skb_for_tx_status(priv,
763 skb,
764 MWIFIEX_BUF_FLAG_EAPOL_TX_STATUS, NULL);
765
766 /* Record the current time the packet was queued; used to
767 * determine the amount of time the packet was queued in
768 * the driver before it was sent to the firmware.
769 * The delay is then sent along with the packet to the
770 * firmware for aggregate delay calculation for stats and
771 * MSDU lifetime expiry.
772 */
773 __net_timestamp(skb);
774
775 if (ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) &&
776 priv->bss_type == MWIFIEX_BSS_TYPE_STA &&
777 !ether_addr_equal_unaligned(priv->cfg_bssid, skb->data)) {
778 if (priv->adapter->auto_tdls && priv->check_tdls_tx)
779 mwifiex_tdls_check_tx(priv, skb);
780 }
781
782 mwifiex_queue_tx_pkt(priv, skb);
783
784 return 0;
785 }
786
787 /*
788 * CFG802.11 network device handler for setting MAC address.
789 */
790 static int
mwifiex_set_mac_address(struct net_device * dev,void * addr)791 mwifiex_set_mac_address(struct net_device *dev, void *addr)
792 {
793 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
794 struct sockaddr *hw_addr = addr;
795 int ret;
796
797 memcpy(priv->curr_addr, hw_addr->sa_data, ETH_ALEN);
798
799 /* Send request to firmware */
800 ret = mwifiex_send_cmd(priv, HostCmd_CMD_802_11_MAC_ADDRESS,
801 HostCmd_ACT_GEN_SET, 0, NULL, true);
802
803 if (!ret)
804 memcpy(priv->netdev->dev_addr, priv->curr_addr, ETH_ALEN);
805 else
806 dev_err(priv->adapter->dev,
807 "set mac address failed: ret=%d\n", ret);
808
809 memcpy(dev->dev_addr, priv->curr_addr, ETH_ALEN);
810
811 return ret;
812 }
813
814 /*
815 * CFG802.11 network device handler for setting multicast list.
816 */
mwifiex_set_multicast_list(struct net_device * dev)817 static void mwifiex_set_multicast_list(struct net_device *dev)
818 {
819 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
820 struct mwifiex_multicast_list mcast_list;
821
822 if (dev->flags & IFF_PROMISC) {
823 mcast_list.mode = MWIFIEX_PROMISC_MODE;
824 } else if (dev->flags & IFF_ALLMULTI ||
825 netdev_mc_count(dev) > MWIFIEX_MAX_MULTICAST_LIST_SIZE) {
826 mcast_list.mode = MWIFIEX_ALL_MULTI_MODE;
827 } else {
828 mcast_list.mode = MWIFIEX_MULTICAST_MODE;
829 mcast_list.num_multicast_addr =
830 mwifiex_copy_mcast_addr(&mcast_list, dev);
831 }
832 mwifiex_request_set_multicast_list(priv, &mcast_list);
833 }
834
835 /*
836 * CFG802.11 network device handler for transmission timeout.
837 */
838 static void
mwifiex_tx_timeout(struct net_device * dev)839 mwifiex_tx_timeout(struct net_device *dev)
840 {
841 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
842
843 priv->num_tx_timeout++;
844 priv->tx_timeout_cnt++;
845 dev_err(priv->adapter->dev,
846 "%lu : Tx timeout(#%d), bss_type-num = %d-%d\n",
847 jiffies, priv->tx_timeout_cnt, priv->bss_type, priv->bss_num);
848 mwifiex_set_trans_start(dev);
849
850 if (priv->tx_timeout_cnt > TX_TIMEOUT_THRESHOLD &&
851 priv->adapter->if_ops.card_reset) {
852 dev_err(priv->adapter->dev,
853 "tx_timeout_cnt exceeds threshold. Triggering card reset!\n");
854 priv->adapter->if_ops.card_reset(priv->adapter);
855 }
856 }
857
mwifiex_dump_drv_info(struct mwifiex_adapter * adapter)858 void mwifiex_dump_drv_info(struct mwifiex_adapter *adapter)
859 {
860 void *p;
861 char drv_version[64];
862 struct usb_card_rec *cardp;
863 struct sdio_mmc_card *sdio_card;
864 struct mwifiex_private *priv;
865 int i, idx;
866 struct netdev_queue *txq;
867 struct mwifiex_debug_info *debug_info;
868
869 if (adapter->drv_info_dump) {
870 vfree(adapter->drv_info_dump);
871 adapter->drv_info_size = 0;
872 }
873
874 dev_info(adapter->dev, "=== DRIVER INFO DUMP START===\n");
875
876 adapter->drv_info_dump = vzalloc(MWIFIEX_DRV_INFO_SIZE_MAX);
877
878 if (!adapter->drv_info_dump)
879 return;
880
881 p = (char *)(adapter->drv_info_dump);
882 p += sprintf(p, "driver_name = " "\"mwifiex\"\n");
883
884 mwifiex_drv_get_driver_version(adapter, drv_version,
885 sizeof(drv_version) - 1);
886 p += sprintf(p, "driver_version = %s\n", drv_version);
887
888 if (adapter->iface_type == MWIFIEX_USB) {
889 cardp = (struct usb_card_rec *)adapter->card;
890 p += sprintf(p, "tx_cmd_urb_pending = %d\n",
891 atomic_read(&cardp->tx_cmd_urb_pending));
892 p += sprintf(p, "tx_data_urb_pending = %d\n",
893 atomic_read(&cardp->tx_data_urb_pending));
894 p += sprintf(p, "rx_cmd_urb_pending = %d\n",
895 atomic_read(&cardp->rx_cmd_urb_pending));
896 p += sprintf(p, "rx_data_urb_pending = %d\n",
897 atomic_read(&cardp->rx_data_urb_pending));
898 }
899
900 p += sprintf(p, "tx_pending = %d\n",
901 atomic_read(&adapter->tx_pending));
902 p += sprintf(p, "rx_pending = %d\n",
903 atomic_read(&adapter->rx_pending));
904
905 if (adapter->iface_type == MWIFIEX_SDIO) {
906 sdio_card = (struct sdio_mmc_card *)adapter->card;
907 p += sprintf(p, "\nmp_rd_bitmap=0x%x curr_rd_port=0x%x\n",
908 sdio_card->mp_rd_bitmap, sdio_card->curr_rd_port);
909 p += sprintf(p, "mp_wr_bitmap=0x%x curr_wr_port=0x%x\n",
910 sdio_card->mp_wr_bitmap, sdio_card->curr_wr_port);
911 }
912
913 for (i = 0; i < adapter->priv_num; i++) {
914 if (!adapter->priv[i] || !adapter->priv[i]->netdev)
915 continue;
916 priv = adapter->priv[i];
917 p += sprintf(p, "\n[interface : \"%s\"]\n",
918 priv->netdev->name);
919 p += sprintf(p, "wmm_tx_pending[0] = %d\n",
920 atomic_read(&priv->wmm_tx_pending[0]));
921 p += sprintf(p, "wmm_tx_pending[1] = %d\n",
922 atomic_read(&priv->wmm_tx_pending[1]));
923 p += sprintf(p, "wmm_tx_pending[2] = %d\n",
924 atomic_read(&priv->wmm_tx_pending[2]));
925 p += sprintf(p, "wmm_tx_pending[3] = %d\n",
926 atomic_read(&priv->wmm_tx_pending[3]));
927 p += sprintf(p, "media_state=\"%s\"\n", !priv->media_connected ?
928 "Disconnected" : "Connected");
929 p += sprintf(p, "carrier %s\n", (netif_carrier_ok(priv->netdev)
930 ? "on" : "off"));
931 for (idx = 0; idx < priv->netdev->num_tx_queues; idx++) {
932 txq = netdev_get_tx_queue(priv->netdev, idx);
933 p += sprintf(p, "tx queue %d:%s ", idx,
934 netif_tx_queue_stopped(txq) ?
935 "stopped" : "started");
936 }
937 p += sprintf(p, "\n%s: num_tx_timeout = %d\n",
938 priv->netdev->name, priv->num_tx_timeout);
939 }
940
941 if (adapter->iface_type == MWIFIEX_SDIO) {
942 p += sprintf(p, "\n=== SDIO register DUMP===\n");
943 if (adapter->if_ops.reg_dump)
944 p += adapter->if_ops.reg_dump(adapter, p);
945 }
946
947 p += sprintf(p, "\n=== MORE DEBUG INFORMATION\n");
948 debug_info = kzalloc(sizeof(*debug_info), GFP_KERNEL);
949 if (debug_info) {
950 for (i = 0; i < adapter->priv_num; i++) {
951 if (!adapter->priv[i] || !adapter->priv[i]->netdev)
952 continue;
953 priv = adapter->priv[i];
954 mwifiex_get_debug_info(priv, debug_info);
955 p += mwifiex_debug_info_to_buffer(priv, p, debug_info);
956 break;
957 }
958 kfree(debug_info);
959 }
960
961 adapter->drv_info_size = p - adapter->drv_info_dump;
962 dev_info(adapter->dev, "=== DRIVER INFO DUMP END===\n");
963 }
964 EXPORT_SYMBOL_GPL(mwifiex_dump_drv_info);
965
966 /*
967 * CFG802.11 network device handler for statistics retrieval.
968 */
mwifiex_get_stats(struct net_device * dev)969 static struct net_device_stats *mwifiex_get_stats(struct net_device *dev)
970 {
971 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
972
973 return &priv->stats;
974 }
975
976 static u16
mwifiex_netdev_select_wmm_queue(struct net_device * dev,struct sk_buff * skb,void * accel_priv,select_queue_fallback_t fallback)977 mwifiex_netdev_select_wmm_queue(struct net_device *dev, struct sk_buff *skb,
978 void *accel_priv, select_queue_fallback_t fallback)
979 {
980 skb->priority = cfg80211_classify8021d(skb, NULL);
981 return mwifiex_1d_to_wmm_queue[skb->priority];
982 }
983
984 /* Network device handlers */
985 static const struct net_device_ops mwifiex_netdev_ops = {
986 .ndo_open = mwifiex_open,
987 .ndo_stop = mwifiex_close,
988 .ndo_start_xmit = mwifiex_hard_start_xmit,
989 .ndo_set_mac_address = mwifiex_set_mac_address,
990 .ndo_tx_timeout = mwifiex_tx_timeout,
991 .ndo_get_stats = mwifiex_get_stats,
992 .ndo_set_rx_mode = mwifiex_set_multicast_list,
993 .ndo_select_queue = mwifiex_netdev_select_wmm_queue,
994 };
995
996 /*
997 * This function initializes the private structure parameters.
998 *
999 * The following wait queues are initialized -
1000 * - IOCTL wait queue
1001 * - Command wait queue
1002 * - Statistics wait queue
1003 *
1004 * ...and the following default parameters are set -
1005 * - Current key index : Set to 0
1006 * - Rate index : Set to auto
1007 * - Media connected : Set to disconnected
1008 * - Adhoc link sensed : Set to false
1009 * - Nick name : Set to null
1010 * - Number of Tx timeout : Set to 0
1011 * - Device address : Set to current address
1012 * - Rx histogram statistc : Set to 0
1013 *
1014 * In addition, the CFG80211 work queue is also created.
1015 */
mwifiex_init_priv_params(struct mwifiex_private * priv,struct net_device * dev)1016 void mwifiex_init_priv_params(struct mwifiex_private *priv,
1017 struct net_device *dev)
1018 {
1019 dev->netdev_ops = &mwifiex_netdev_ops;
1020 dev->destructor = free_netdev;
1021 /* Initialize private structure */
1022 priv->current_key_index = 0;
1023 priv->media_connected = false;
1024 memset(priv->mgmt_ie, 0,
1025 sizeof(struct mwifiex_ie) * MAX_MGMT_IE_INDEX);
1026 priv->beacon_idx = MWIFIEX_AUTO_IDX_MASK;
1027 priv->proberesp_idx = MWIFIEX_AUTO_IDX_MASK;
1028 priv->assocresp_idx = MWIFIEX_AUTO_IDX_MASK;
1029 priv->gen_idx = MWIFIEX_AUTO_IDX_MASK;
1030 priv->num_tx_timeout = 0;
1031 ether_addr_copy(priv->curr_addr, priv->adapter->perm_addr);
1032 memcpy(dev->dev_addr, priv->curr_addr, ETH_ALEN);
1033
1034 if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA ||
1035 GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_UAP) {
1036 priv->hist_data = kmalloc(sizeof(*priv->hist_data), GFP_KERNEL);
1037 if (priv->hist_data)
1038 mwifiex_hist_data_reset(priv);
1039 }
1040 }
1041
1042 /*
1043 * This function check if command is pending.
1044 */
is_command_pending(struct mwifiex_adapter * adapter)1045 int is_command_pending(struct mwifiex_adapter *adapter)
1046 {
1047 unsigned long flags;
1048 int is_cmd_pend_q_empty;
1049
1050 spin_lock_irqsave(&adapter->cmd_pending_q_lock, flags);
1051 is_cmd_pend_q_empty = list_empty(&adapter->cmd_pending_q);
1052 spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, flags);
1053
1054 return !is_cmd_pend_q_empty;
1055 }
1056
1057 /*
1058 * This is the RX work queue function.
1059 *
1060 * It handles the RX operations.
1061 */
mwifiex_rx_work_queue(struct work_struct * work)1062 static void mwifiex_rx_work_queue(struct work_struct *work)
1063 {
1064 struct mwifiex_adapter *adapter =
1065 container_of(work, struct mwifiex_adapter, rx_work);
1066
1067 if (adapter->surprise_removed)
1068 return;
1069 mwifiex_process_rx(adapter);
1070 }
1071
1072 /*
1073 * This is the main work queue function.
1074 *
1075 * It handles the main process, which in turn handles the complete
1076 * driver operations.
1077 */
mwifiex_main_work_queue(struct work_struct * work)1078 static void mwifiex_main_work_queue(struct work_struct *work)
1079 {
1080 struct mwifiex_adapter *adapter =
1081 container_of(work, struct mwifiex_adapter, main_work);
1082
1083 if (adapter->surprise_removed)
1084 return;
1085 mwifiex_main_process(adapter);
1086 }
1087
1088 /*
1089 * This function adds the card.
1090 *
1091 * This function follows the following major steps to set up the device -
1092 * - Initialize software. This includes probing the card, registering
1093 * the interface operations table, and allocating/initializing the
1094 * adapter structure
1095 * - Set up the netlink socket
1096 * - Create and start the main work queue
1097 * - Register the device
1098 * - Initialize firmware and hardware
1099 * - Add logical interfaces
1100 */
1101 int
mwifiex_add_card(void * card,struct semaphore * sem,struct mwifiex_if_ops * if_ops,u8 iface_type)1102 mwifiex_add_card(void *card, struct semaphore *sem,
1103 struct mwifiex_if_ops *if_ops, u8 iface_type)
1104 {
1105 struct mwifiex_adapter *adapter;
1106
1107 if (down_interruptible(sem))
1108 goto exit_sem_err;
1109
1110 if (mwifiex_register(card, if_ops, (void **)&adapter)) {
1111 pr_err("%s: software init failed\n", __func__);
1112 goto err_init_sw;
1113 }
1114
1115 adapter->iface_type = iface_type;
1116 adapter->card_sem = sem;
1117
1118 adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
1119 adapter->surprise_removed = false;
1120 init_waitqueue_head(&adapter->init_wait_q);
1121 adapter->is_suspended = false;
1122 adapter->hs_activated = false;
1123 init_waitqueue_head(&adapter->hs_activate_wait_q);
1124 init_waitqueue_head(&adapter->cmd_wait_q.wait);
1125 adapter->cmd_wait_q.status = 0;
1126 adapter->scan_wait_q_woken = false;
1127
1128 if ((num_possible_cpus() > 1) || adapter->iface_type == MWIFIEX_USB) {
1129 adapter->rx_work_enabled = true;
1130 pr_notice("rx work enabled, cpus %d\n", num_possible_cpus());
1131 }
1132
1133 adapter->workqueue =
1134 alloc_workqueue("MWIFIEX_WORK_QUEUE",
1135 WQ_HIGHPRI | WQ_MEM_RECLAIM | WQ_UNBOUND, 1);
1136 if (!adapter->workqueue)
1137 goto err_kmalloc;
1138
1139 INIT_WORK(&adapter->main_work, mwifiex_main_work_queue);
1140
1141 if (adapter->rx_work_enabled) {
1142 adapter->rx_workqueue = alloc_workqueue("MWIFIEX_RX_WORK_QUEUE",
1143 WQ_HIGHPRI |
1144 WQ_MEM_RECLAIM |
1145 WQ_UNBOUND, 1);
1146 if (!adapter->rx_workqueue)
1147 goto err_kmalloc;
1148
1149 INIT_WORK(&adapter->rx_work, mwifiex_rx_work_queue);
1150 }
1151
1152 /* Register the device. Fill up the private data structure with relevant
1153 information from the card. */
1154 if (adapter->if_ops.register_dev(adapter)) {
1155 pr_err("%s: failed to register mwifiex device\n", __func__);
1156 goto err_registerdev;
1157 }
1158
1159 if (mwifiex_init_hw_fw(adapter)) {
1160 pr_err("%s: firmware init failed\n", __func__);
1161 goto err_init_fw;
1162 }
1163
1164 return 0;
1165
1166 err_init_fw:
1167 pr_debug("info: %s: unregister device\n", __func__);
1168 if (adapter->if_ops.unregister_dev)
1169 adapter->if_ops.unregister_dev(adapter);
1170 if (adapter->hw_status == MWIFIEX_HW_STATUS_READY) {
1171 pr_debug("info: %s: shutdown mwifiex\n", __func__);
1172 adapter->init_wait_q_woken = false;
1173
1174 if (mwifiex_shutdown_drv(adapter) == -EINPROGRESS)
1175 wait_event_interruptible(adapter->init_wait_q,
1176 adapter->init_wait_q_woken);
1177 }
1178 err_registerdev:
1179 adapter->surprise_removed = true;
1180 mwifiex_terminate_workqueue(adapter);
1181 err_kmalloc:
1182 mwifiex_free_adapter(adapter);
1183
1184 err_init_sw:
1185 up(sem);
1186
1187 exit_sem_err:
1188 return -1;
1189 }
1190 EXPORT_SYMBOL_GPL(mwifiex_add_card);
1191
1192 /*
1193 * This function removes the card.
1194 *
1195 * This function follows the following major steps to remove the device -
1196 * - Stop data traffic
1197 * - Shutdown firmware
1198 * - Remove the logical interfaces
1199 * - Terminate the work queue
1200 * - Unregister the device
1201 * - Free the adapter structure
1202 */
mwifiex_remove_card(struct mwifiex_adapter * adapter,struct semaphore * sem)1203 int mwifiex_remove_card(struct mwifiex_adapter *adapter, struct semaphore *sem)
1204 {
1205 struct mwifiex_private *priv = NULL;
1206 int i;
1207
1208 if (down_interruptible(sem))
1209 goto exit_sem_err;
1210
1211 if (!adapter)
1212 goto exit_remove;
1213
1214 /* We can no longer handle interrupts once we start doing the teardown
1215 * below. */
1216 if (adapter->if_ops.disable_int)
1217 adapter->if_ops.disable_int(adapter);
1218
1219 adapter->surprise_removed = true;
1220
1221 mwifiex_terminate_workqueue(adapter);
1222
1223 /* Stop data */
1224 for (i = 0; i < adapter->priv_num; i++) {
1225 priv = adapter->priv[i];
1226 if (priv && priv->netdev) {
1227 mwifiex_stop_net_dev_queue(priv->netdev, adapter);
1228 if (netif_carrier_ok(priv->netdev))
1229 netif_carrier_off(priv->netdev);
1230 }
1231 }
1232
1233 dev_dbg(adapter->dev, "cmd: calling mwifiex_shutdown_drv...\n");
1234 adapter->init_wait_q_woken = false;
1235
1236 if (mwifiex_shutdown_drv(adapter) == -EINPROGRESS)
1237 wait_event_interruptible(adapter->init_wait_q,
1238 adapter->init_wait_q_woken);
1239 dev_dbg(adapter->dev, "cmd: mwifiex_shutdown_drv done\n");
1240 if (atomic_read(&adapter->rx_pending) ||
1241 atomic_read(&adapter->tx_pending) ||
1242 atomic_read(&adapter->cmd_pending)) {
1243 dev_err(adapter->dev, "rx_pending=%d, tx_pending=%d, "
1244 "cmd_pending=%d\n",
1245 atomic_read(&adapter->rx_pending),
1246 atomic_read(&adapter->tx_pending),
1247 atomic_read(&adapter->cmd_pending));
1248 }
1249
1250 for (i = 0; i < adapter->priv_num; i++) {
1251 priv = adapter->priv[i];
1252
1253 if (!priv)
1254 continue;
1255
1256 rtnl_lock();
1257 if (priv->netdev &&
1258 priv->wdev.iftype != NL80211_IFTYPE_UNSPECIFIED)
1259 mwifiex_del_virtual_intf(adapter->wiphy, &priv->wdev);
1260 rtnl_unlock();
1261 }
1262
1263 wiphy_unregister(adapter->wiphy);
1264 wiphy_free(adapter->wiphy);
1265
1266 /* Unregister device */
1267 dev_dbg(adapter->dev, "info: unregister device\n");
1268 if (adapter->if_ops.unregister_dev)
1269 adapter->if_ops.unregister_dev(adapter);
1270 /* Free adapter structure */
1271 dev_dbg(adapter->dev, "info: free adapter\n");
1272 mwifiex_free_adapter(adapter);
1273
1274 exit_remove:
1275 up(sem);
1276 exit_sem_err:
1277 return 0;
1278 }
1279 EXPORT_SYMBOL_GPL(mwifiex_remove_card);
1280
1281 /*
1282 * This function initializes the module.
1283 *
1284 * The debug FS is also initialized if configured.
1285 */
1286 static int
mwifiex_init_module(void)1287 mwifiex_init_module(void)
1288 {
1289 #ifdef CONFIG_DEBUG_FS
1290 mwifiex_debugfs_init();
1291 #endif
1292 return 0;
1293 }
1294
1295 /*
1296 * This function cleans up the module.
1297 *
1298 * The debug FS is removed if available.
1299 */
1300 static void
mwifiex_cleanup_module(void)1301 mwifiex_cleanup_module(void)
1302 {
1303 #ifdef CONFIG_DEBUG_FS
1304 mwifiex_debugfs_remove();
1305 #endif
1306 }
1307
1308 module_init(mwifiex_init_module);
1309 module_exit(mwifiex_cleanup_module);
1310
1311 MODULE_AUTHOR("Marvell International Ltd.");
1312 MODULE_DESCRIPTION("Marvell WiFi-Ex Driver version " VERSION);
1313 MODULE_VERSION(VERSION);
1314 MODULE_LICENSE("GPL v2");
1315