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 <linux/suspend.h>
21
22 #include "main.h"
23 #include "wmm.h"
24 #include "cfg80211.h"
25 #include "11n.h"
26
27 #define VERSION "1.0"
28 #define MFG_FIRMWARE "mwifiex_mfg.bin"
29
30 static unsigned int debug_mask = MWIFIEX_DEFAULT_DEBUG_MASK;
31 module_param(debug_mask, uint, 0);
32 MODULE_PARM_DESC(debug_mask, "bitmap for debug flags");
33
34 const char driver_version[] = "mwifiex " VERSION " (%s) ";
35 static char *cal_data_cfg;
36 module_param(cal_data_cfg, charp, 0);
37
38 static unsigned short driver_mode;
39 module_param(driver_mode, ushort, 0);
40 MODULE_PARM_DESC(driver_mode,
41 "station=0x1(default), ap-sta=0x3, station-p2p=0x5, ap-sta-p2p=0x7");
42
43 bool mfg_mode;
44 module_param(mfg_mode, bool, 0);
45 MODULE_PARM_DESC(mfg_mode, "manufacturing mode enable:1, disable:0");
46
47 bool aggr_ctrl;
48 module_param(aggr_ctrl, bool, 0000);
49 MODULE_PARM_DESC(aggr_ctrl, "usb tx aggregation enable:1, disable:0");
50
51 /*
52 * This function registers the device and performs all the necessary
53 * initializations.
54 *
55 * The following initialization operations are performed -
56 * - Allocate adapter structure
57 * - Save interface specific operations table in adapter
58 * - Call interface specific initialization routine
59 * - Allocate private structures
60 * - Set default adapter structure parameters
61 * - Initialize locks
62 *
63 * In case of any errors during inittialization, this function also ensures
64 * proper cleanup before exiting.
65 */
mwifiex_register(void * card,struct device * dev,struct mwifiex_if_ops * if_ops,void ** padapter)66 static int mwifiex_register(void *card, struct device *dev,
67 struct mwifiex_if_ops *if_ops, void **padapter)
68 {
69 struct mwifiex_adapter *adapter;
70 int i;
71
72 adapter = kzalloc(sizeof(struct mwifiex_adapter), GFP_KERNEL);
73 if (!adapter)
74 return -ENOMEM;
75
76 *padapter = adapter;
77 adapter->dev = dev;
78 adapter->card = card;
79
80 /* Save interface specific operations in adapter */
81 memmove(&adapter->if_ops, if_ops, sizeof(struct mwifiex_if_ops));
82 adapter->debug_mask = debug_mask;
83
84 /* card specific initialization has been deferred until now .. */
85 if (adapter->if_ops.init_if)
86 if (adapter->if_ops.init_if(adapter))
87 goto error;
88
89 adapter->priv_num = 0;
90
91 for (i = 0; i < MWIFIEX_MAX_BSS_NUM; i++) {
92 /* Allocate memory for private structure */
93 adapter->priv[i] =
94 kzalloc(sizeof(struct mwifiex_private), GFP_KERNEL);
95 if (!adapter->priv[i])
96 goto error;
97
98 adapter->priv[i]->adapter = adapter;
99 adapter->priv_num++;
100 }
101 mwifiex_init_lock_list(adapter);
102
103 timer_setup(&adapter->cmd_timer, mwifiex_cmd_timeout_func, 0);
104
105 return 0;
106
107 error:
108 mwifiex_dbg(adapter, ERROR,
109 "info: leave mwifiex_register with error\n");
110
111 for (i = 0; i < adapter->priv_num; i++)
112 kfree(adapter->priv[i]);
113
114 kfree(adapter);
115
116 return -1;
117 }
118
119 /*
120 * This function unregisters the device and performs all the necessary
121 * cleanups.
122 *
123 * The following cleanup operations are performed -
124 * - Free the timers
125 * - Free beacon buffers
126 * - Free private structures
127 * - Free adapter structure
128 */
mwifiex_unregister(struct mwifiex_adapter * adapter)129 static int mwifiex_unregister(struct mwifiex_adapter *adapter)
130 {
131 s32 i;
132
133 if (adapter->if_ops.cleanup_if)
134 adapter->if_ops.cleanup_if(adapter);
135
136 del_timer_sync(&adapter->cmd_timer);
137
138 /* Free private structures */
139 for (i = 0; i < adapter->priv_num; i++) {
140 if (adapter->priv[i]) {
141 mwifiex_free_curr_bcn(adapter->priv[i]);
142 kfree(adapter->priv[i]);
143 }
144 }
145
146 if (adapter->nd_info) {
147 for (i = 0 ; i < adapter->nd_info->n_matches ; i++)
148 kfree(adapter->nd_info->matches[i]);
149 kfree(adapter->nd_info);
150 adapter->nd_info = NULL;
151 }
152
153 kfree(adapter->regd);
154
155 kfree(adapter);
156 return 0;
157 }
158
mwifiex_queue_main_work(struct mwifiex_adapter * adapter)159 void mwifiex_queue_main_work(struct mwifiex_adapter *adapter)
160 {
161 unsigned long flags;
162
163 spin_lock_irqsave(&adapter->main_proc_lock, flags);
164 if (adapter->mwifiex_processing) {
165 adapter->more_task_flag = true;
166 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
167 } else {
168 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
169 queue_work(adapter->workqueue, &adapter->main_work);
170 }
171 }
172 EXPORT_SYMBOL_GPL(mwifiex_queue_main_work);
173
mwifiex_queue_rx_work(struct mwifiex_adapter * adapter)174 static void mwifiex_queue_rx_work(struct mwifiex_adapter *adapter)
175 {
176 unsigned long flags;
177
178 spin_lock_irqsave(&adapter->rx_proc_lock, flags);
179 if (adapter->rx_processing) {
180 spin_unlock_irqrestore(&adapter->rx_proc_lock, flags);
181 } else {
182 spin_unlock_irqrestore(&adapter->rx_proc_lock, flags);
183 queue_work(adapter->rx_workqueue, &adapter->rx_work);
184 }
185 }
186
mwifiex_process_rx(struct mwifiex_adapter * adapter)187 static int mwifiex_process_rx(struct mwifiex_adapter *adapter)
188 {
189 unsigned long flags;
190 struct sk_buff *skb;
191 struct mwifiex_rxinfo *rx_info;
192
193 spin_lock_irqsave(&adapter->rx_proc_lock, flags);
194 if (adapter->rx_processing || adapter->rx_locked) {
195 spin_unlock_irqrestore(&adapter->rx_proc_lock, flags);
196 goto exit_rx_proc;
197 } else {
198 adapter->rx_processing = true;
199 spin_unlock_irqrestore(&adapter->rx_proc_lock, flags);
200 }
201
202 /* Check for Rx data */
203 while ((skb = skb_dequeue(&adapter->rx_data_q))) {
204 atomic_dec(&adapter->rx_pending);
205 if ((adapter->delay_main_work ||
206 adapter->iface_type == MWIFIEX_USB) &&
207 (atomic_read(&adapter->rx_pending) < LOW_RX_PENDING)) {
208 if (adapter->if_ops.submit_rem_rx_urbs)
209 adapter->if_ops.submit_rem_rx_urbs(adapter);
210 adapter->delay_main_work = false;
211 mwifiex_queue_main_work(adapter);
212 }
213 rx_info = MWIFIEX_SKB_RXCB(skb);
214 if (rx_info->buf_type == MWIFIEX_TYPE_AGGR_DATA) {
215 if (adapter->if_ops.deaggr_pkt)
216 adapter->if_ops.deaggr_pkt(adapter, skb);
217 dev_kfree_skb_any(skb);
218 } else {
219 mwifiex_handle_rx_packet(adapter, skb);
220 }
221 }
222 spin_lock_irqsave(&adapter->rx_proc_lock, flags);
223 adapter->rx_processing = false;
224 spin_unlock_irqrestore(&adapter->rx_proc_lock, flags);
225
226 exit_rx_proc:
227 return 0;
228 }
229
230 /*
231 * The main process.
232 *
233 * This function is the main procedure of the driver and handles various driver
234 * operations. It runs in a loop and provides the core functionalities.
235 *
236 * The main responsibilities of this function are -
237 * - Ensure concurrency control
238 * - Handle pending interrupts and call interrupt handlers
239 * - Wake up the card if required
240 * - Handle command responses and call response handlers
241 * - Handle events and call event handlers
242 * - Execute pending commands
243 * - Transmit pending data packets
244 */
mwifiex_main_process(struct mwifiex_adapter * adapter)245 int mwifiex_main_process(struct mwifiex_adapter *adapter)
246 {
247 int ret = 0;
248 unsigned long flags;
249
250 spin_lock_irqsave(&adapter->main_proc_lock, flags);
251
252 /* Check if already processing */
253 if (adapter->mwifiex_processing || adapter->main_locked) {
254 adapter->more_task_flag = true;
255 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
256 return 0;
257 } else {
258 adapter->mwifiex_processing = true;
259 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
260 }
261 process_start:
262 do {
263 if (adapter->hw_status == MWIFIEX_HW_STATUS_NOT_READY)
264 break;
265
266 /* For non-USB interfaces, If we process interrupts first, it
267 * would increase RX pending even further. Avoid this by
268 * checking if rx_pending has crossed high threshold and
269 * schedule rx work queue and then process interrupts.
270 * For USB interface, there are no interrupts. We already have
271 * HIGH_RX_PENDING check in usb.c
272 */
273 if (atomic_read(&adapter->rx_pending) >= HIGH_RX_PENDING &&
274 adapter->iface_type != MWIFIEX_USB) {
275 adapter->delay_main_work = true;
276 mwifiex_queue_rx_work(adapter);
277 break;
278 }
279
280 /* Handle pending interrupt if any */
281 if (adapter->int_status) {
282 if (adapter->hs_activated)
283 mwifiex_process_hs_config(adapter);
284 if (adapter->if_ops.process_int_status)
285 adapter->if_ops.process_int_status(adapter);
286 }
287
288 if (adapter->rx_work_enabled && adapter->data_received)
289 mwifiex_queue_rx_work(adapter);
290
291 /* Need to wake up the card ? */
292 if ((adapter->ps_state == PS_STATE_SLEEP) &&
293 (adapter->pm_wakeup_card_req &&
294 !adapter->pm_wakeup_fw_try) &&
295 (is_command_pending(adapter) ||
296 !skb_queue_empty(&adapter->tx_data_q) ||
297 !mwifiex_bypass_txlist_empty(adapter) ||
298 !mwifiex_wmm_lists_empty(adapter))) {
299 adapter->pm_wakeup_fw_try = true;
300 mod_timer(&adapter->wakeup_timer, jiffies + (HZ*3));
301 adapter->if_ops.wakeup(adapter);
302 continue;
303 }
304
305 if (IS_CARD_RX_RCVD(adapter)) {
306 adapter->data_received = false;
307 adapter->pm_wakeup_fw_try = false;
308 del_timer(&adapter->wakeup_timer);
309 if (adapter->ps_state == PS_STATE_SLEEP)
310 adapter->ps_state = PS_STATE_AWAKE;
311 } else {
312 /* We have tried to wakeup the card already */
313 if (adapter->pm_wakeup_fw_try)
314 break;
315 if (adapter->ps_state == PS_STATE_PRE_SLEEP)
316 mwifiex_check_ps_cond(adapter);
317
318 if (adapter->ps_state != PS_STATE_AWAKE)
319 break;
320 if (adapter->tx_lock_flag) {
321 if (adapter->iface_type == MWIFIEX_USB) {
322 if (!adapter->usb_mc_setup)
323 break;
324 } else
325 break;
326 }
327
328 if ((!adapter->scan_chan_gap_enabled &&
329 adapter->scan_processing) || adapter->data_sent ||
330 mwifiex_is_tdls_chan_switching
331 (mwifiex_get_priv(adapter,
332 MWIFIEX_BSS_ROLE_STA)) ||
333 (mwifiex_wmm_lists_empty(adapter) &&
334 mwifiex_bypass_txlist_empty(adapter) &&
335 skb_queue_empty(&adapter->tx_data_q))) {
336 if (adapter->cmd_sent || adapter->curr_cmd ||
337 !mwifiex_is_send_cmd_allowed
338 (mwifiex_get_priv(adapter,
339 MWIFIEX_BSS_ROLE_STA)) ||
340 (!is_command_pending(adapter)))
341 break;
342 }
343 }
344
345 /* Check for event */
346 if (adapter->event_received) {
347 adapter->event_received = false;
348 mwifiex_process_event(adapter);
349 }
350
351 /* Check for Cmd Resp */
352 if (adapter->cmd_resp_received) {
353 adapter->cmd_resp_received = false;
354 mwifiex_process_cmdresp(adapter);
355
356 /* call mwifiex back when init_fw is done */
357 if (adapter->hw_status == MWIFIEX_HW_STATUS_INIT_DONE) {
358 adapter->hw_status = MWIFIEX_HW_STATUS_READY;
359 mwifiex_init_fw_complete(adapter);
360 }
361 }
362
363 /* Check if we need to confirm Sleep Request
364 received previously */
365 if (adapter->ps_state == PS_STATE_PRE_SLEEP)
366 mwifiex_check_ps_cond(adapter);
367
368 /* * The ps_state may have been changed during processing of
369 * Sleep Request event.
370 */
371 if ((adapter->ps_state == PS_STATE_SLEEP) ||
372 (adapter->ps_state == PS_STATE_PRE_SLEEP) ||
373 (adapter->ps_state == PS_STATE_SLEEP_CFM)) {
374 continue;
375 }
376
377 if (adapter->tx_lock_flag) {
378 if (adapter->iface_type == MWIFIEX_USB) {
379 if (!adapter->usb_mc_setup)
380 continue;
381 } else
382 continue;
383 }
384
385 if (!adapter->cmd_sent && !adapter->curr_cmd &&
386 mwifiex_is_send_cmd_allowed
387 (mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA))) {
388 if (mwifiex_exec_next_cmd(adapter) == -1) {
389 ret = -1;
390 break;
391 }
392 }
393
394 /** If USB Multi channel setup ongoing,
395 * wait for ready to tx data.
396 */
397 if (adapter->iface_type == MWIFIEX_USB &&
398 adapter->usb_mc_setup)
399 continue;
400
401 if ((adapter->scan_chan_gap_enabled ||
402 !adapter->scan_processing) &&
403 !adapter->data_sent &&
404 !skb_queue_empty(&adapter->tx_data_q)) {
405 mwifiex_process_tx_queue(adapter);
406 if (adapter->hs_activated) {
407 clear_bit(MWIFIEX_IS_HS_CONFIGURED,
408 &adapter->work_flags);
409 mwifiex_hs_activated_event
410 (mwifiex_get_priv
411 (adapter, MWIFIEX_BSS_ROLE_ANY),
412 false);
413 }
414 }
415
416 if ((adapter->scan_chan_gap_enabled ||
417 !adapter->scan_processing) &&
418 !adapter->data_sent &&
419 !mwifiex_bypass_txlist_empty(adapter) &&
420 !mwifiex_is_tdls_chan_switching
421 (mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA))) {
422 mwifiex_process_bypass_tx(adapter);
423 if (adapter->hs_activated) {
424 clear_bit(MWIFIEX_IS_HS_CONFIGURED,
425 &adapter->work_flags);
426 mwifiex_hs_activated_event
427 (mwifiex_get_priv
428 (adapter, MWIFIEX_BSS_ROLE_ANY),
429 false);
430 }
431 }
432
433 if ((adapter->scan_chan_gap_enabled ||
434 !adapter->scan_processing) &&
435 !adapter->data_sent && !mwifiex_wmm_lists_empty(adapter) &&
436 !mwifiex_is_tdls_chan_switching
437 (mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA))) {
438 mwifiex_wmm_process_tx(adapter);
439 if (adapter->hs_activated) {
440 clear_bit(MWIFIEX_IS_HS_CONFIGURED,
441 &adapter->work_flags);
442 mwifiex_hs_activated_event
443 (mwifiex_get_priv
444 (adapter, MWIFIEX_BSS_ROLE_ANY),
445 false);
446 }
447 }
448
449 if (adapter->delay_null_pkt && !adapter->cmd_sent &&
450 !adapter->curr_cmd && !is_command_pending(adapter) &&
451 (mwifiex_wmm_lists_empty(adapter) &&
452 mwifiex_bypass_txlist_empty(adapter) &&
453 skb_queue_empty(&adapter->tx_data_q))) {
454 if (!mwifiex_send_null_packet
455 (mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA),
456 MWIFIEX_TxPD_POWER_MGMT_NULL_PACKET |
457 MWIFIEX_TxPD_POWER_MGMT_LAST_PACKET)) {
458 adapter->delay_null_pkt = false;
459 adapter->ps_state = PS_STATE_SLEEP;
460 }
461 break;
462 }
463 } while (true);
464
465 spin_lock_irqsave(&adapter->main_proc_lock, flags);
466 if (adapter->more_task_flag) {
467 adapter->more_task_flag = false;
468 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
469 goto process_start;
470 }
471 adapter->mwifiex_processing = false;
472 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
473
474 return ret;
475 }
476 EXPORT_SYMBOL_GPL(mwifiex_main_process);
477
478 /*
479 * This function frees the adapter structure.
480 *
481 * Additionally, this closes the netlink socket, frees the timers
482 * and private structures.
483 */
mwifiex_free_adapter(struct mwifiex_adapter * adapter)484 static void mwifiex_free_adapter(struct mwifiex_adapter *adapter)
485 {
486 if (!adapter) {
487 pr_err("%s: adapter is NULL\n", __func__);
488 return;
489 }
490
491 mwifiex_unregister(adapter);
492 pr_debug("info: %s: free adapter\n", __func__);
493 }
494
495 /*
496 * This function cancels all works in the queue and destroys
497 * the main workqueue.
498 */
mwifiex_terminate_workqueue(struct mwifiex_adapter * adapter)499 static void mwifiex_terminate_workqueue(struct mwifiex_adapter *adapter)
500 {
501 if (adapter->workqueue) {
502 flush_workqueue(adapter->workqueue);
503 destroy_workqueue(adapter->workqueue);
504 adapter->workqueue = NULL;
505 }
506
507 if (adapter->rx_workqueue) {
508 flush_workqueue(adapter->rx_workqueue);
509 destroy_workqueue(adapter->rx_workqueue);
510 adapter->rx_workqueue = NULL;
511 }
512 }
513
514 /*
515 * This function gets firmware and initializes it.
516 *
517 * The main initialization steps followed are -
518 * - Download the correct firmware to card
519 * - Issue the init commands to firmware
520 */
_mwifiex_fw_dpc(const struct firmware * firmware,void * context)521 static int _mwifiex_fw_dpc(const struct firmware *firmware, void *context)
522 {
523 int ret;
524 char fmt[64];
525 struct mwifiex_adapter *adapter = context;
526 struct mwifiex_fw_image fw;
527 bool init_failed = false;
528 struct wireless_dev *wdev;
529 struct completion *fw_done = adapter->fw_done;
530
531 if (!firmware) {
532 mwifiex_dbg(adapter, ERROR,
533 "Failed to get firmware %s\n", adapter->fw_name);
534 goto err_dnld_fw;
535 }
536
537 memset(&fw, 0, sizeof(struct mwifiex_fw_image));
538 adapter->firmware = firmware;
539 fw.fw_buf = (u8 *) adapter->firmware->data;
540 fw.fw_len = adapter->firmware->size;
541
542 if (adapter->if_ops.dnld_fw) {
543 ret = adapter->if_ops.dnld_fw(adapter, &fw);
544 } else {
545 ret = mwifiex_dnld_fw(adapter, &fw);
546 }
547
548 if (ret == -1)
549 goto err_dnld_fw;
550
551 mwifiex_dbg(adapter, MSG, "WLAN FW is active\n");
552
553 if (cal_data_cfg) {
554 if ((request_firmware(&adapter->cal_data, cal_data_cfg,
555 adapter->dev)) < 0)
556 mwifiex_dbg(adapter, ERROR,
557 "Cal data request_firmware() failed\n");
558 }
559
560 /* enable host interrupt after fw dnld is successful */
561 if (adapter->if_ops.enable_int) {
562 if (adapter->if_ops.enable_int(adapter))
563 goto err_dnld_fw;
564 }
565
566 adapter->init_wait_q_woken = false;
567 ret = mwifiex_init_fw(adapter);
568 if (ret == -1) {
569 goto err_init_fw;
570 } else if (!ret) {
571 adapter->hw_status = MWIFIEX_HW_STATUS_READY;
572 goto done;
573 }
574 /* Wait for mwifiex_init to complete */
575 if (!adapter->mfg_mode) {
576 wait_event_interruptible(adapter->init_wait_q,
577 adapter->init_wait_q_woken);
578 if (adapter->hw_status != MWIFIEX_HW_STATUS_READY)
579 goto err_init_fw;
580 }
581
582 if (!adapter->wiphy) {
583 if (mwifiex_register_cfg80211(adapter)) {
584 mwifiex_dbg(adapter, ERROR,
585 "cannot register with cfg80211\n");
586 goto err_init_fw;
587 }
588 }
589
590 if (mwifiex_init_channel_scan_gap(adapter)) {
591 mwifiex_dbg(adapter, ERROR,
592 "could not init channel stats table\n");
593 goto err_init_chan_scan;
594 }
595
596 if (driver_mode) {
597 driver_mode &= MWIFIEX_DRIVER_MODE_BITMASK;
598 driver_mode |= MWIFIEX_DRIVER_MODE_STA;
599 }
600
601 rtnl_lock();
602 /* Create station interface by default */
603 wdev = mwifiex_add_virtual_intf(adapter->wiphy, "mlan%d", NET_NAME_ENUM,
604 NL80211_IFTYPE_STATION, NULL);
605 if (IS_ERR(wdev)) {
606 mwifiex_dbg(adapter, ERROR,
607 "cannot create default STA interface\n");
608 rtnl_unlock();
609 goto err_add_intf;
610 }
611
612 if (driver_mode & MWIFIEX_DRIVER_MODE_UAP) {
613 wdev = mwifiex_add_virtual_intf(adapter->wiphy, "uap%d", NET_NAME_ENUM,
614 NL80211_IFTYPE_AP, NULL);
615 if (IS_ERR(wdev)) {
616 mwifiex_dbg(adapter, ERROR,
617 "cannot create AP interface\n");
618 rtnl_unlock();
619 goto err_add_intf;
620 }
621 }
622
623 if (driver_mode & MWIFIEX_DRIVER_MODE_P2P) {
624 wdev = mwifiex_add_virtual_intf(adapter->wiphy, "p2p%d", NET_NAME_ENUM,
625 NL80211_IFTYPE_P2P_CLIENT, NULL);
626 if (IS_ERR(wdev)) {
627 mwifiex_dbg(adapter, ERROR,
628 "cannot create p2p client interface\n");
629 rtnl_unlock();
630 goto err_add_intf;
631 }
632 }
633 rtnl_unlock();
634
635 mwifiex_drv_get_driver_version(adapter, fmt, sizeof(fmt) - 1);
636 mwifiex_dbg(adapter, MSG, "driver_version = %s\n", fmt);
637 goto done;
638
639 err_add_intf:
640 vfree(adapter->chan_stats);
641 err_init_chan_scan:
642 wiphy_unregister(adapter->wiphy);
643 wiphy_free(adapter->wiphy);
644 err_init_fw:
645 if (adapter->if_ops.disable_int)
646 adapter->if_ops.disable_int(adapter);
647 err_dnld_fw:
648 mwifiex_dbg(adapter, ERROR,
649 "info: %s: unregister device\n", __func__);
650 if (adapter->if_ops.unregister_dev)
651 adapter->if_ops.unregister_dev(adapter);
652
653 set_bit(MWIFIEX_SURPRISE_REMOVED, &adapter->work_flags);
654 mwifiex_terminate_workqueue(adapter);
655
656 if (adapter->hw_status == MWIFIEX_HW_STATUS_READY) {
657 pr_debug("info: %s: shutdown mwifiex\n", __func__);
658 mwifiex_shutdown_drv(adapter);
659 mwifiex_free_cmd_buffers(adapter);
660 }
661
662 init_failed = true;
663 done:
664 if (adapter->cal_data) {
665 release_firmware(adapter->cal_data);
666 adapter->cal_data = NULL;
667 }
668 if (adapter->firmware) {
669 release_firmware(adapter->firmware);
670 adapter->firmware = NULL;
671 }
672 if (init_failed) {
673 if (adapter->irq_wakeup >= 0)
674 device_init_wakeup(adapter->dev, false);
675 mwifiex_free_adapter(adapter);
676 }
677 /* Tell all current and future waiters we're finished */
678 complete_all(fw_done);
679
680 return init_failed ? -EIO : 0;
681 }
682
mwifiex_fw_dpc(const struct firmware * firmware,void * context)683 static void mwifiex_fw_dpc(const struct firmware *firmware, void *context)
684 {
685 _mwifiex_fw_dpc(firmware, context);
686 }
687
688 /*
689 * This function gets the firmware and (if called asynchronously) kicks off the
690 * HW init when done.
691 */
mwifiex_init_hw_fw(struct mwifiex_adapter * adapter,bool req_fw_nowait)692 static int mwifiex_init_hw_fw(struct mwifiex_adapter *adapter,
693 bool req_fw_nowait)
694 {
695 int ret;
696
697 /* Override default firmware with manufacturing one if
698 * manufacturing mode is enabled
699 */
700 if (mfg_mode) {
701 if (strlcpy(adapter->fw_name, MFG_FIRMWARE,
702 sizeof(adapter->fw_name)) >=
703 sizeof(adapter->fw_name)) {
704 pr_err("%s: fw_name too long!\n", __func__);
705 return -1;
706 }
707 }
708
709 if (req_fw_nowait) {
710 ret = request_firmware_nowait(THIS_MODULE, 1, adapter->fw_name,
711 adapter->dev, GFP_KERNEL, adapter,
712 mwifiex_fw_dpc);
713 } else {
714 ret = request_firmware(&adapter->firmware,
715 adapter->fw_name,
716 adapter->dev);
717 }
718
719 if (ret < 0)
720 mwifiex_dbg(adapter, ERROR, "request_firmware%s error %d\n",
721 req_fw_nowait ? "_nowait" : "", ret);
722 return ret;
723 }
724
725 /*
726 * CFG802.11 network device handler for open.
727 *
728 * Starts the data queue.
729 */
730 static int
mwifiex_open(struct net_device * dev)731 mwifiex_open(struct net_device *dev)
732 {
733 netif_carrier_off(dev);
734
735 return 0;
736 }
737
738 /*
739 * CFG802.11 network device handler for close.
740 */
741 static int
mwifiex_close(struct net_device * dev)742 mwifiex_close(struct net_device *dev)
743 {
744 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
745
746 if (priv->scan_request) {
747 struct cfg80211_scan_info info = {
748 .aborted = true,
749 };
750
751 mwifiex_dbg(priv->adapter, INFO,
752 "aborting scan on ndo_stop\n");
753 cfg80211_scan_done(priv->scan_request, &info);
754 priv->scan_request = NULL;
755 priv->scan_aborting = true;
756 }
757
758 if (priv->sched_scanning) {
759 mwifiex_dbg(priv->adapter, INFO,
760 "aborting bgscan on ndo_stop\n");
761 mwifiex_stop_bg_scan(priv);
762 cfg80211_sched_scan_stopped(priv->wdev.wiphy, 0);
763 }
764
765 return 0;
766 }
767
768 static bool
mwifiex_bypass_tx_queue(struct mwifiex_private * priv,struct sk_buff * skb)769 mwifiex_bypass_tx_queue(struct mwifiex_private *priv,
770 struct sk_buff *skb)
771 {
772 struct ethhdr *eth_hdr = (struct ethhdr *)skb->data;
773
774 if (ntohs(eth_hdr->h_proto) == ETH_P_PAE ||
775 mwifiex_is_skb_mgmt_frame(skb) ||
776 (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA &&
777 ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) &&
778 (ntohs(eth_hdr->h_proto) == ETH_P_TDLS))) {
779 mwifiex_dbg(priv->adapter, DATA,
780 "bypass txqueue; eth type %#x, mgmt %d\n",
781 ntohs(eth_hdr->h_proto),
782 mwifiex_is_skb_mgmt_frame(skb));
783 return true;
784 }
785
786 return false;
787 }
788 /*
789 * Add buffer into wmm tx queue and queue work to transmit it.
790 */
mwifiex_queue_tx_pkt(struct mwifiex_private * priv,struct sk_buff * skb)791 int mwifiex_queue_tx_pkt(struct mwifiex_private *priv, struct sk_buff *skb)
792 {
793 struct netdev_queue *txq;
794 int index = mwifiex_1d_to_wmm_queue[skb->priority];
795
796 if (atomic_inc_return(&priv->wmm_tx_pending[index]) >= MAX_TX_PENDING) {
797 txq = netdev_get_tx_queue(priv->netdev, index);
798 if (!netif_tx_queue_stopped(txq)) {
799 netif_tx_stop_queue(txq);
800 mwifiex_dbg(priv->adapter, DATA,
801 "stop queue: %d\n", index);
802 }
803 }
804
805 if (mwifiex_bypass_tx_queue(priv, skb)) {
806 atomic_inc(&priv->adapter->tx_pending);
807 atomic_inc(&priv->adapter->bypass_tx_pending);
808 mwifiex_wmm_add_buf_bypass_txqueue(priv, skb);
809 } else {
810 atomic_inc(&priv->adapter->tx_pending);
811 mwifiex_wmm_add_buf_txqueue(priv, skb);
812 }
813
814 mwifiex_queue_main_work(priv->adapter);
815
816 return 0;
817 }
818
819 struct sk_buff *
mwifiex_clone_skb_for_tx_status(struct mwifiex_private * priv,struct sk_buff * skb,u8 flag,u64 * cookie)820 mwifiex_clone_skb_for_tx_status(struct mwifiex_private *priv,
821 struct sk_buff *skb, u8 flag, u64 *cookie)
822 {
823 struct sk_buff *orig_skb = skb;
824 struct mwifiex_txinfo *tx_info, *orig_tx_info;
825
826 skb = skb_clone(skb, GFP_ATOMIC);
827 if (skb) {
828 unsigned long flags;
829 int id;
830
831 spin_lock_irqsave(&priv->ack_status_lock, flags);
832 id = idr_alloc(&priv->ack_status_frames, orig_skb,
833 1, 0x10, GFP_ATOMIC);
834 spin_unlock_irqrestore(&priv->ack_status_lock, flags);
835
836 if (id >= 0) {
837 tx_info = MWIFIEX_SKB_TXCB(skb);
838 tx_info->ack_frame_id = id;
839 tx_info->flags |= flag;
840 orig_tx_info = MWIFIEX_SKB_TXCB(orig_skb);
841 orig_tx_info->ack_frame_id = id;
842 orig_tx_info->flags |= flag;
843
844 if (flag == MWIFIEX_BUF_FLAG_ACTION_TX_STATUS && cookie)
845 orig_tx_info->cookie = *cookie;
846
847 } else if (skb_shared(skb)) {
848 kfree_skb(orig_skb);
849 } else {
850 kfree_skb(skb);
851 skb = orig_skb;
852 }
853 } else {
854 /* couldn't clone -- lose tx status ... */
855 skb = orig_skb;
856 }
857
858 return skb;
859 }
860
861 /*
862 * CFG802.11 network device handler for data transmission.
863 */
864 static netdev_tx_t
mwifiex_hard_start_xmit(struct sk_buff * skb,struct net_device * dev)865 mwifiex_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
866 {
867 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
868 struct sk_buff *new_skb;
869 struct mwifiex_txinfo *tx_info;
870 bool multicast;
871
872 mwifiex_dbg(priv->adapter, DATA,
873 "data: %lu BSS(%d-%d): Data <= kernel\n",
874 jiffies, priv->bss_type, priv->bss_num);
875
876 if (test_bit(MWIFIEX_SURPRISE_REMOVED, &priv->adapter->work_flags)) {
877 kfree_skb(skb);
878 priv->stats.tx_dropped++;
879 return 0;
880 }
881 if (!skb->len || (skb->len > ETH_FRAME_LEN)) {
882 mwifiex_dbg(priv->adapter, ERROR,
883 "Tx: bad skb len %d\n", skb->len);
884 kfree_skb(skb);
885 priv->stats.tx_dropped++;
886 return 0;
887 }
888 if (skb_headroom(skb) < MWIFIEX_MIN_DATA_HEADER_LEN) {
889 mwifiex_dbg(priv->adapter, DATA,
890 "data: Tx: insufficient skb headroom %d\n",
891 skb_headroom(skb));
892 /* Insufficient skb headroom - allocate a new skb */
893 new_skb =
894 skb_realloc_headroom(skb, MWIFIEX_MIN_DATA_HEADER_LEN);
895 if (unlikely(!new_skb)) {
896 mwifiex_dbg(priv->adapter, ERROR,
897 "Tx: cannot alloca new_skb\n");
898 kfree_skb(skb);
899 priv->stats.tx_dropped++;
900 return 0;
901 }
902 kfree_skb(skb);
903 skb = new_skb;
904 mwifiex_dbg(priv->adapter, INFO,
905 "info: new skb headroomd %d\n",
906 skb_headroom(skb));
907 }
908
909 tx_info = MWIFIEX_SKB_TXCB(skb);
910 memset(tx_info, 0, sizeof(*tx_info));
911 tx_info->bss_num = priv->bss_num;
912 tx_info->bss_type = priv->bss_type;
913 tx_info->pkt_len = skb->len;
914
915 multicast = is_multicast_ether_addr(skb->data);
916
917 if (unlikely(!multicast && skb->sk &&
918 skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS &&
919 priv->adapter->fw_api_ver == MWIFIEX_FW_V15))
920 skb = mwifiex_clone_skb_for_tx_status(priv,
921 skb,
922 MWIFIEX_BUF_FLAG_EAPOL_TX_STATUS, NULL);
923
924 /* Record the current time the packet was queued; used to
925 * determine the amount of time the packet was queued in
926 * the driver before it was sent to the firmware.
927 * The delay is then sent along with the packet to the
928 * firmware for aggregate delay calculation for stats and
929 * MSDU lifetime expiry.
930 */
931 __net_timestamp(skb);
932
933 if (ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) &&
934 priv->bss_type == MWIFIEX_BSS_TYPE_STA &&
935 !ether_addr_equal_unaligned(priv->cfg_bssid, skb->data)) {
936 if (priv->adapter->auto_tdls && priv->check_tdls_tx)
937 mwifiex_tdls_check_tx(priv, skb);
938 }
939
940 mwifiex_queue_tx_pkt(priv, skb);
941
942 return 0;
943 }
944
mwifiex_set_mac_address(struct mwifiex_private * priv,struct net_device * dev,bool external,u8 * new_mac)945 int mwifiex_set_mac_address(struct mwifiex_private *priv,
946 struct net_device *dev, bool external,
947 u8 *new_mac)
948 {
949 int ret;
950 u64 mac_addr, old_mac_addr;
951
952 old_mac_addr = ether_addr_to_u64(priv->curr_addr);
953
954 if (external) {
955 mac_addr = ether_addr_to_u64(new_mac);
956 } else {
957 /* Internal mac address change */
958 if (priv->bss_type == MWIFIEX_BSS_TYPE_ANY)
959 return -ENOTSUPP;
960
961 mac_addr = old_mac_addr;
962
963 if (priv->bss_type == MWIFIEX_BSS_TYPE_P2P)
964 mac_addr |= BIT_ULL(MWIFIEX_MAC_LOCAL_ADMIN_BIT);
965
966 if (mwifiex_get_intf_num(priv->adapter, priv->bss_type) > 1) {
967 /* Set mac address based on bss_type/bss_num */
968 mac_addr ^= BIT_ULL(priv->bss_type + 8);
969 mac_addr += priv->bss_num;
970 }
971 }
972
973 u64_to_ether_addr(mac_addr, priv->curr_addr);
974
975 /* Send request to firmware */
976 ret = mwifiex_send_cmd(priv, HostCmd_CMD_802_11_MAC_ADDRESS,
977 HostCmd_ACT_GEN_SET, 0, NULL, true);
978
979 if (ret) {
980 u64_to_ether_addr(old_mac_addr, priv->curr_addr);
981 mwifiex_dbg(priv->adapter, ERROR,
982 "set mac address failed: ret=%d\n", ret);
983 return ret;
984 }
985
986 ether_addr_copy(dev->dev_addr, priv->curr_addr);
987 return 0;
988 }
989
990 /* CFG802.11 network device handler for setting MAC address.
991 */
992 static int
mwifiex_ndo_set_mac_address(struct net_device * dev,void * addr)993 mwifiex_ndo_set_mac_address(struct net_device *dev, void *addr)
994 {
995 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
996 struct sockaddr *hw_addr = addr;
997
998 return mwifiex_set_mac_address(priv, dev, true, hw_addr->sa_data);
999 }
1000
1001 /*
1002 * CFG802.11 network device handler for setting multicast list.
1003 */
mwifiex_set_multicast_list(struct net_device * dev)1004 static void mwifiex_set_multicast_list(struct net_device *dev)
1005 {
1006 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
1007 struct mwifiex_multicast_list mcast_list;
1008
1009 if (dev->flags & IFF_PROMISC) {
1010 mcast_list.mode = MWIFIEX_PROMISC_MODE;
1011 } else if (dev->flags & IFF_ALLMULTI ||
1012 netdev_mc_count(dev) > MWIFIEX_MAX_MULTICAST_LIST_SIZE) {
1013 mcast_list.mode = MWIFIEX_ALL_MULTI_MODE;
1014 } else {
1015 mcast_list.mode = MWIFIEX_MULTICAST_MODE;
1016 mcast_list.num_multicast_addr =
1017 mwifiex_copy_mcast_addr(&mcast_list, dev);
1018 }
1019 mwifiex_request_set_multicast_list(priv, &mcast_list);
1020 }
1021
1022 /*
1023 * CFG802.11 network device handler for transmission timeout.
1024 */
1025 static void
mwifiex_tx_timeout(struct net_device * dev)1026 mwifiex_tx_timeout(struct net_device *dev)
1027 {
1028 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
1029
1030 priv->num_tx_timeout++;
1031 priv->tx_timeout_cnt++;
1032 mwifiex_dbg(priv->adapter, ERROR,
1033 "%lu : Tx timeout(#%d), bss_type-num = %d-%d\n",
1034 jiffies, priv->tx_timeout_cnt, priv->bss_type,
1035 priv->bss_num);
1036 mwifiex_set_trans_start(dev);
1037
1038 if (priv->tx_timeout_cnt > TX_TIMEOUT_THRESHOLD &&
1039 priv->adapter->if_ops.card_reset) {
1040 mwifiex_dbg(priv->adapter, ERROR,
1041 "tx_timeout_cnt exceeds threshold.\t"
1042 "Triggering card reset!\n");
1043 priv->adapter->if_ops.card_reset(priv->adapter);
1044 }
1045 }
1046
mwifiex_multi_chan_resync(struct mwifiex_adapter * adapter)1047 void mwifiex_multi_chan_resync(struct mwifiex_adapter *adapter)
1048 {
1049 struct usb_card_rec *card = adapter->card;
1050 struct mwifiex_private *priv;
1051 u16 tx_buf_size;
1052 int i, ret;
1053
1054 card->mc_resync_flag = true;
1055 for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++) {
1056 if (atomic_read(&card->port[i].tx_data_urb_pending)) {
1057 mwifiex_dbg(adapter, WARN, "pending data urb in sys\n");
1058 return;
1059 }
1060 }
1061
1062 card->mc_resync_flag = false;
1063 tx_buf_size = 0xffff;
1064 priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
1065 ret = mwifiex_send_cmd(priv, HostCmd_CMD_RECONFIGURE_TX_BUFF,
1066 HostCmd_ACT_GEN_SET, 0, &tx_buf_size, false);
1067 if (ret)
1068 mwifiex_dbg(adapter, ERROR,
1069 "send reconfig tx buf size cmd err\n");
1070 }
1071 EXPORT_SYMBOL_GPL(mwifiex_multi_chan_resync);
1072
mwifiex_upload_device_dump(struct mwifiex_adapter * adapter)1073 void mwifiex_upload_device_dump(struct mwifiex_adapter *adapter)
1074 {
1075 /* Dump all the memory data into single file, a userspace script will
1076 * be used to split all the memory data to multiple files
1077 */
1078 mwifiex_dbg(adapter, MSG,
1079 "== mwifiex dump information to /sys/class/devcoredump start\n");
1080 dev_coredumpv(adapter->dev, adapter->devdump_data, adapter->devdump_len,
1081 GFP_KERNEL);
1082 mwifiex_dbg(adapter, MSG,
1083 "== mwifiex dump information to /sys/class/devcoredump end\n");
1084
1085 /* Device dump data will be freed in device coredump release function
1086 * after 5 min. Here reset adapter->devdump_data and ->devdump_len
1087 * to avoid it been accidentally reused.
1088 */
1089 adapter->devdump_data = NULL;
1090 adapter->devdump_len = 0;
1091 }
1092 EXPORT_SYMBOL_GPL(mwifiex_upload_device_dump);
1093
mwifiex_drv_info_dump(struct mwifiex_adapter * adapter)1094 void mwifiex_drv_info_dump(struct mwifiex_adapter *adapter)
1095 {
1096 char *p;
1097 char drv_version[64];
1098 struct usb_card_rec *cardp;
1099 struct sdio_mmc_card *sdio_card;
1100 struct mwifiex_private *priv;
1101 int i, idx;
1102 struct netdev_queue *txq;
1103 struct mwifiex_debug_info *debug_info;
1104
1105 mwifiex_dbg(adapter, MSG, "===mwifiex driverinfo dump start===\n");
1106
1107 p = adapter->devdump_data;
1108 strcpy(p, "========Start dump driverinfo========\n");
1109 p += strlen("========Start dump driverinfo========\n");
1110 p += sprintf(p, "driver_name = " "\"mwifiex\"\n");
1111
1112 mwifiex_drv_get_driver_version(adapter, drv_version,
1113 sizeof(drv_version) - 1);
1114 p += sprintf(p, "driver_version = %s\n", drv_version);
1115
1116 if (adapter->iface_type == MWIFIEX_USB) {
1117 cardp = (struct usb_card_rec *)adapter->card;
1118 p += sprintf(p, "tx_cmd_urb_pending = %d\n",
1119 atomic_read(&cardp->tx_cmd_urb_pending));
1120 p += sprintf(p, "tx_data_urb_pending_port_0 = %d\n",
1121 atomic_read(&cardp->port[0].tx_data_urb_pending));
1122 p += sprintf(p, "tx_data_urb_pending_port_1 = %d\n",
1123 atomic_read(&cardp->port[1].tx_data_urb_pending));
1124 p += sprintf(p, "rx_cmd_urb_pending = %d\n",
1125 atomic_read(&cardp->rx_cmd_urb_pending));
1126 p += sprintf(p, "rx_data_urb_pending = %d\n",
1127 atomic_read(&cardp->rx_data_urb_pending));
1128 }
1129
1130 p += sprintf(p, "tx_pending = %d\n",
1131 atomic_read(&adapter->tx_pending));
1132 p += sprintf(p, "rx_pending = %d\n",
1133 atomic_read(&adapter->rx_pending));
1134
1135 if (adapter->iface_type == MWIFIEX_SDIO) {
1136 sdio_card = (struct sdio_mmc_card *)adapter->card;
1137 p += sprintf(p, "\nmp_rd_bitmap=0x%x curr_rd_port=0x%x\n",
1138 sdio_card->mp_rd_bitmap, sdio_card->curr_rd_port);
1139 p += sprintf(p, "mp_wr_bitmap=0x%x curr_wr_port=0x%x\n",
1140 sdio_card->mp_wr_bitmap, sdio_card->curr_wr_port);
1141 }
1142
1143 for (i = 0; i < adapter->priv_num; i++) {
1144 if (!adapter->priv[i] || !adapter->priv[i]->netdev)
1145 continue;
1146 priv = adapter->priv[i];
1147 p += sprintf(p, "\n[interface : \"%s\"]\n",
1148 priv->netdev->name);
1149 p += sprintf(p, "wmm_tx_pending[0] = %d\n",
1150 atomic_read(&priv->wmm_tx_pending[0]));
1151 p += sprintf(p, "wmm_tx_pending[1] = %d\n",
1152 atomic_read(&priv->wmm_tx_pending[1]));
1153 p += sprintf(p, "wmm_tx_pending[2] = %d\n",
1154 atomic_read(&priv->wmm_tx_pending[2]));
1155 p += sprintf(p, "wmm_tx_pending[3] = %d\n",
1156 atomic_read(&priv->wmm_tx_pending[3]));
1157 p += sprintf(p, "media_state=\"%s\"\n", !priv->media_connected ?
1158 "Disconnected" : "Connected");
1159 p += sprintf(p, "carrier %s\n", (netif_carrier_ok(priv->netdev)
1160 ? "on" : "off"));
1161 for (idx = 0; idx < priv->netdev->num_tx_queues; idx++) {
1162 txq = netdev_get_tx_queue(priv->netdev, idx);
1163 p += sprintf(p, "tx queue %d:%s ", idx,
1164 netif_tx_queue_stopped(txq) ?
1165 "stopped" : "started");
1166 }
1167 p += sprintf(p, "\n%s: num_tx_timeout = %d\n",
1168 priv->netdev->name, priv->num_tx_timeout);
1169 }
1170
1171 if (adapter->iface_type == MWIFIEX_SDIO ||
1172 adapter->iface_type == MWIFIEX_PCIE) {
1173 p += sprintf(p, "\n=== %s register dump===\n",
1174 adapter->iface_type == MWIFIEX_SDIO ?
1175 "SDIO" : "PCIE");
1176 if (adapter->if_ops.reg_dump)
1177 p += adapter->if_ops.reg_dump(adapter, p);
1178 }
1179 p += sprintf(p, "\n=== more debug information\n");
1180 debug_info = kzalloc(sizeof(*debug_info), GFP_KERNEL);
1181 if (debug_info) {
1182 for (i = 0; i < adapter->priv_num; i++) {
1183 if (!adapter->priv[i] || !adapter->priv[i]->netdev)
1184 continue;
1185 priv = adapter->priv[i];
1186 mwifiex_get_debug_info(priv, debug_info);
1187 p += mwifiex_debug_info_to_buffer(priv, p, debug_info);
1188 break;
1189 }
1190 kfree(debug_info);
1191 }
1192
1193 strcpy(p, "\n========End dump========\n");
1194 p += strlen("\n========End dump========\n");
1195 mwifiex_dbg(adapter, MSG, "===mwifiex driverinfo dump end===\n");
1196 adapter->devdump_len = p - (char *)adapter->devdump_data;
1197 }
1198 EXPORT_SYMBOL_GPL(mwifiex_drv_info_dump);
1199
mwifiex_prepare_fw_dump_info(struct mwifiex_adapter * adapter)1200 void mwifiex_prepare_fw_dump_info(struct mwifiex_adapter *adapter)
1201 {
1202 u8 idx;
1203 char *fw_dump_ptr;
1204 u32 dump_len = 0;
1205
1206 for (idx = 0; idx < adapter->num_mem_types; idx++) {
1207 struct memory_type_mapping *entry =
1208 &adapter->mem_type_mapping_tbl[idx];
1209
1210 if (entry->mem_ptr) {
1211 dump_len += (strlen("========Start dump ") +
1212 strlen(entry->mem_name) +
1213 strlen("========\n") +
1214 (entry->mem_size + 1) +
1215 strlen("\n========End dump========\n"));
1216 }
1217 }
1218
1219 if (dump_len + 1 + adapter->devdump_len > MWIFIEX_FW_DUMP_SIZE) {
1220 /* Realloc in case buffer overflow */
1221 fw_dump_ptr = vzalloc(dump_len + 1 + adapter->devdump_len);
1222 mwifiex_dbg(adapter, MSG, "Realloc device dump data.\n");
1223 if (!fw_dump_ptr) {
1224 vfree(adapter->devdump_data);
1225 mwifiex_dbg(adapter, ERROR,
1226 "vzalloc devdump data failure!\n");
1227 return;
1228 }
1229
1230 memmove(fw_dump_ptr, adapter->devdump_data,
1231 adapter->devdump_len);
1232 vfree(adapter->devdump_data);
1233 adapter->devdump_data = fw_dump_ptr;
1234 }
1235
1236 fw_dump_ptr = (char *)adapter->devdump_data + adapter->devdump_len;
1237
1238 for (idx = 0; idx < adapter->num_mem_types; idx++) {
1239 struct memory_type_mapping *entry =
1240 &adapter->mem_type_mapping_tbl[idx];
1241
1242 if (entry->mem_ptr) {
1243 strcpy(fw_dump_ptr, "========Start dump ");
1244 fw_dump_ptr += strlen("========Start dump ");
1245
1246 strcpy(fw_dump_ptr, entry->mem_name);
1247 fw_dump_ptr += strlen(entry->mem_name);
1248
1249 strcpy(fw_dump_ptr, "========\n");
1250 fw_dump_ptr += strlen("========\n");
1251
1252 memcpy(fw_dump_ptr, entry->mem_ptr, entry->mem_size);
1253 fw_dump_ptr += entry->mem_size;
1254
1255 strcpy(fw_dump_ptr, "\n========End dump========\n");
1256 fw_dump_ptr += strlen("\n========End dump========\n");
1257 }
1258 }
1259
1260 adapter->devdump_len = fw_dump_ptr - (char *)adapter->devdump_data;
1261
1262 for (idx = 0; idx < adapter->num_mem_types; idx++) {
1263 struct memory_type_mapping *entry =
1264 &adapter->mem_type_mapping_tbl[idx];
1265
1266 vfree(entry->mem_ptr);
1267 entry->mem_ptr = NULL;
1268 entry->mem_size = 0;
1269 }
1270 }
1271 EXPORT_SYMBOL_GPL(mwifiex_prepare_fw_dump_info);
1272
1273 /*
1274 * CFG802.11 network device handler for statistics retrieval.
1275 */
mwifiex_get_stats(struct net_device * dev)1276 static struct net_device_stats *mwifiex_get_stats(struct net_device *dev)
1277 {
1278 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
1279
1280 return &priv->stats;
1281 }
1282
1283 static u16
mwifiex_netdev_select_wmm_queue(struct net_device * dev,struct sk_buff * skb,struct net_device * sb_dev,select_queue_fallback_t fallback)1284 mwifiex_netdev_select_wmm_queue(struct net_device *dev, struct sk_buff *skb,
1285 struct net_device *sb_dev,
1286 select_queue_fallback_t fallback)
1287 {
1288 skb->priority = cfg80211_classify8021d(skb, NULL);
1289 return mwifiex_1d_to_wmm_queue[skb->priority];
1290 }
1291
1292 /* Network device handlers */
1293 static const struct net_device_ops mwifiex_netdev_ops = {
1294 .ndo_open = mwifiex_open,
1295 .ndo_stop = mwifiex_close,
1296 .ndo_start_xmit = mwifiex_hard_start_xmit,
1297 .ndo_set_mac_address = mwifiex_ndo_set_mac_address,
1298 .ndo_validate_addr = eth_validate_addr,
1299 .ndo_tx_timeout = mwifiex_tx_timeout,
1300 .ndo_get_stats = mwifiex_get_stats,
1301 .ndo_set_rx_mode = mwifiex_set_multicast_list,
1302 .ndo_select_queue = mwifiex_netdev_select_wmm_queue,
1303 };
1304
1305 /*
1306 * This function initializes the private structure parameters.
1307 *
1308 * The following wait queues are initialized -
1309 * - IOCTL wait queue
1310 * - Command wait queue
1311 * - Statistics wait queue
1312 *
1313 * ...and the following default parameters are set -
1314 * - Current key index : Set to 0
1315 * - Rate index : Set to auto
1316 * - Media connected : Set to disconnected
1317 * - Adhoc link sensed : Set to false
1318 * - Nick name : Set to null
1319 * - Number of Tx timeout : Set to 0
1320 * - Device address : Set to current address
1321 * - Rx histogram statistc : Set to 0
1322 *
1323 * In addition, the CFG80211 work queue is also created.
1324 */
mwifiex_init_priv_params(struct mwifiex_private * priv,struct net_device * dev)1325 void mwifiex_init_priv_params(struct mwifiex_private *priv,
1326 struct net_device *dev)
1327 {
1328 dev->netdev_ops = &mwifiex_netdev_ops;
1329 dev->needs_free_netdev = true;
1330 /* Initialize private structure */
1331 priv->current_key_index = 0;
1332 priv->media_connected = false;
1333 memset(priv->mgmt_ie, 0,
1334 sizeof(struct mwifiex_ie) * MAX_MGMT_IE_INDEX);
1335 priv->beacon_idx = MWIFIEX_AUTO_IDX_MASK;
1336 priv->proberesp_idx = MWIFIEX_AUTO_IDX_MASK;
1337 priv->assocresp_idx = MWIFIEX_AUTO_IDX_MASK;
1338 priv->gen_idx = MWIFIEX_AUTO_IDX_MASK;
1339 priv->num_tx_timeout = 0;
1340 if (is_valid_ether_addr(dev->dev_addr))
1341 ether_addr_copy(priv->curr_addr, dev->dev_addr);
1342 else
1343 ether_addr_copy(priv->curr_addr, priv->adapter->perm_addr);
1344
1345 if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA ||
1346 GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_UAP) {
1347 priv->hist_data = kmalloc(sizeof(*priv->hist_data), GFP_KERNEL);
1348 if (priv->hist_data)
1349 mwifiex_hist_data_reset(priv);
1350 }
1351 }
1352
1353 /*
1354 * This function check if command is pending.
1355 */
is_command_pending(struct mwifiex_adapter * adapter)1356 int is_command_pending(struct mwifiex_adapter *adapter)
1357 {
1358 unsigned long flags;
1359 int is_cmd_pend_q_empty;
1360
1361 spin_lock_irqsave(&adapter->cmd_pending_q_lock, flags);
1362 is_cmd_pend_q_empty = list_empty(&adapter->cmd_pending_q);
1363 spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, flags);
1364
1365 return !is_cmd_pend_q_empty;
1366 }
1367
1368 /*
1369 * This is the RX work queue function.
1370 *
1371 * It handles the RX operations.
1372 */
mwifiex_rx_work_queue(struct work_struct * work)1373 static void mwifiex_rx_work_queue(struct work_struct *work)
1374 {
1375 struct mwifiex_adapter *adapter =
1376 container_of(work, struct mwifiex_adapter, rx_work);
1377
1378 if (test_bit(MWIFIEX_SURPRISE_REMOVED, &adapter->work_flags))
1379 return;
1380 mwifiex_process_rx(adapter);
1381 }
1382
1383 /*
1384 * This is the main work queue function.
1385 *
1386 * It handles the main process, which in turn handles the complete
1387 * driver operations.
1388 */
mwifiex_main_work_queue(struct work_struct * work)1389 static void mwifiex_main_work_queue(struct work_struct *work)
1390 {
1391 struct mwifiex_adapter *adapter =
1392 container_of(work, struct mwifiex_adapter, main_work);
1393
1394 if (test_bit(MWIFIEX_SURPRISE_REMOVED, &adapter->work_flags))
1395 return;
1396 mwifiex_main_process(adapter);
1397 }
1398
1399 /* Common teardown code used for both device removal and reset */
mwifiex_uninit_sw(struct mwifiex_adapter * adapter)1400 static void mwifiex_uninit_sw(struct mwifiex_adapter *adapter)
1401 {
1402 struct mwifiex_private *priv;
1403 int i;
1404
1405 /* We can no longer handle interrupts once we start doing the teardown
1406 * below.
1407 */
1408 if (adapter->if_ops.disable_int)
1409 adapter->if_ops.disable_int(adapter);
1410
1411 set_bit(MWIFIEX_SURPRISE_REMOVED, &adapter->work_flags);
1412 mwifiex_terminate_workqueue(adapter);
1413 adapter->int_status = 0;
1414
1415 /* Stop data */
1416 for (i = 0; i < adapter->priv_num; i++) {
1417 priv = adapter->priv[i];
1418 if (priv && priv->netdev) {
1419 mwifiex_stop_net_dev_queue(priv->netdev, adapter);
1420 if (netif_carrier_ok(priv->netdev))
1421 netif_carrier_off(priv->netdev);
1422 netif_device_detach(priv->netdev);
1423 }
1424 }
1425
1426 mwifiex_dbg(adapter, CMD, "cmd: calling mwifiex_shutdown_drv...\n");
1427 mwifiex_shutdown_drv(adapter);
1428 mwifiex_dbg(adapter, CMD, "cmd: mwifiex_shutdown_drv done\n");
1429
1430 if (atomic_read(&adapter->rx_pending) ||
1431 atomic_read(&adapter->tx_pending) ||
1432 atomic_read(&adapter->cmd_pending)) {
1433 mwifiex_dbg(adapter, ERROR,
1434 "rx_pending=%d, tx_pending=%d,\t"
1435 "cmd_pending=%d\n",
1436 atomic_read(&adapter->rx_pending),
1437 atomic_read(&adapter->tx_pending),
1438 atomic_read(&adapter->cmd_pending));
1439 }
1440
1441 for (i = 0; i < adapter->priv_num; i++) {
1442 priv = adapter->priv[i];
1443 if (!priv)
1444 continue;
1445 rtnl_lock();
1446 if (priv->netdev &&
1447 priv->wdev.iftype != NL80211_IFTYPE_UNSPECIFIED)
1448 mwifiex_del_virtual_intf(adapter->wiphy, &priv->wdev);
1449 rtnl_unlock();
1450 }
1451
1452 wiphy_unregister(adapter->wiphy);
1453 wiphy_free(adapter->wiphy);
1454 adapter->wiphy = NULL;
1455
1456 vfree(adapter->chan_stats);
1457 mwifiex_free_cmd_buffers(adapter);
1458 }
1459
1460 /*
1461 * This function gets called during PCIe function level reset.
1462 */
mwifiex_shutdown_sw(struct mwifiex_adapter * adapter)1463 int mwifiex_shutdown_sw(struct mwifiex_adapter *adapter)
1464 {
1465 struct mwifiex_private *priv;
1466
1467 if (!adapter)
1468 return 0;
1469
1470 wait_for_completion(adapter->fw_done);
1471 /* Caller should ensure we aren't suspending while this happens */
1472 reinit_completion(adapter->fw_done);
1473
1474 priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
1475 mwifiex_deauthenticate(priv, NULL);
1476
1477 mwifiex_uninit_sw(adapter);
1478
1479 if (adapter->if_ops.down_dev)
1480 adapter->if_ops.down_dev(adapter);
1481
1482 return 0;
1483 }
1484 EXPORT_SYMBOL_GPL(mwifiex_shutdown_sw);
1485
1486 /* This function gets called during PCIe function level reset. Required
1487 * code is extracted from mwifiex_add_card()
1488 */
1489 int
mwifiex_reinit_sw(struct mwifiex_adapter * adapter)1490 mwifiex_reinit_sw(struct mwifiex_adapter *adapter)
1491 {
1492 int ret;
1493
1494 mwifiex_init_lock_list(adapter);
1495 if (adapter->if_ops.up_dev)
1496 adapter->if_ops.up_dev(adapter);
1497
1498 adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
1499 clear_bit(MWIFIEX_SURPRISE_REMOVED, &adapter->work_flags);
1500 init_waitqueue_head(&adapter->init_wait_q);
1501 clear_bit(MWIFIEX_IS_SUSPENDED, &adapter->work_flags);
1502 adapter->hs_activated = false;
1503 clear_bit(MWIFIEX_IS_CMD_TIMEDOUT, &adapter->work_flags);
1504 init_waitqueue_head(&adapter->hs_activate_wait_q);
1505 init_waitqueue_head(&adapter->cmd_wait_q.wait);
1506 adapter->cmd_wait_q.status = 0;
1507 adapter->scan_wait_q_woken = false;
1508
1509 if ((num_possible_cpus() > 1) || adapter->iface_type == MWIFIEX_USB)
1510 adapter->rx_work_enabled = true;
1511
1512 adapter->workqueue =
1513 alloc_workqueue("MWIFIEX_WORK_QUEUE",
1514 WQ_HIGHPRI | WQ_MEM_RECLAIM | WQ_UNBOUND, 1);
1515 if (!adapter->workqueue)
1516 goto err_kmalloc;
1517
1518 INIT_WORK(&adapter->main_work, mwifiex_main_work_queue);
1519
1520 if (adapter->rx_work_enabled) {
1521 adapter->rx_workqueue = alloc_workqueue("MWIFIEX_RX_WORK_QUEUE",
1522 WQ_HIGHPRI |
1523 WQ_MEM_RECLAIM |
1524 WQ_UNBOUND, 1);
1525 if (!adapter->rx_workqueue)
1526 goto err_kmalloc;
1527 INIT_WORK(&adapter->rx_work, mwifiex_rx_work_queue);
1528 }
1529
1530 /* Register the device. Fill up the private data structure with
1531 * relevant information from the card. Some code extracted from
1532 * mwifiex_register_dev()
1533 */
1534 mwifiex_dbg(adapter, INFO, "%s, mwifiex_init_hw_fw()...\n", __func__);
1535
1536 if (mwifiex_init_hw_fw(adapter, false)) {
1537 mwifiex_dbg(adapter, ERROR,
1538 "%s: firmware init failed\n", __func__);
1539 goto err_init_fw;
1540 }
1541
1542 /* _mwifiex_fw_dpc() does its own cleanup */
1543 ret = _mwifiex_fw_dpc(adapter->firmware, adapter);
1544 if (ret) {
1545 pr_err("Failed to bring up adapter: %d\n", ret);
1546 return ret;
1547 }
1548 mwifiex_dbg(adapter, INFO, "%s, successful\n", __func__);
1549
1550 return 0;
1551
1552 err_init_fw:
1553 mwifiex_dbg(adapter, ERROR, "info: %s: unregister device\n", __func__);
1554 if (adapter->if_ops.unregister_dev)
1555 adapter->if_ops.unregister_dev(adapter);
1556
1557 err_kmalloc:
1558 set_bit(MWIFIEX_SURPRISE_REMOVED, &adapter->work_flags);
1559 mwifiex_terminate_workqueue(adapter);
1560 if (adapter->hw_status == MWIFIEX_HW_STATUS_READY) {
1561 mwifiex_dbg(adapter, ERROR,
1562 "info: %s: shutdown mwifiex\n", __func__);
1563 mwifiex_shutdown_drv(adapter);
1564 mwifiex_free_cmd_buffers(adapter);
1565 }
1566
1567 complete_all(adapter->fw_done);
1568 mwifiex_dbg(adapter, INFO, "%s, error\n", __func__);
1569
1570 return -1;
1571 }
1572 EXPORT_SYMBOL_GPL(mwifiex_reinit_sw);
1573
mwifiex_irq_wakeup_handler(int irq,void * priv)1574 static irqreturn_t mwifiex_irq_wakeup_handler(int irq, void *priv)
1575 {
1576 struct mwifiex_adapter *adapter = priv;
1577
1578 dev_dbg(adapter->dev, "%s: wake by wifi", __func__);
1579 adapter->wake_by_wifi = true;
1580 disable_irq_nosync(irq);
1581
1582 /* Notify PM core we are wakeup source */
1583 pm_wakeup_event(adapter->dev, 0);
1584 pm_system_wakeup();
1585
1586 return IRQ_HANDLED;
1587 }
1588
mwifiex_probe_of(struct mwifiex_adapter * adapter)1589 static void mwifiex_probe_of(struct mwifiex_adapter *adapter)
1590 {
1591 int ret;
1592 struct device *dev = adapter->dev;
1593
1594 if (!dev->of_node)
1595 goto err_exit;
1596
1597 adapter->dt_node = dev->of_node;
1598 adapter->irq_wakeup = irq_of_parse_and_map(adapter->dt_node, 0);
1599 if (!adapter->irq_wakeup) {
1600 dev_dbg(dev, "fail to parse irq_wakeup from device tree\n");
1601 goto err_exit;
1602 }
1603
1604 ret = devm_request_irq(dev, adapter->irq_wakeup,
1605 mwifiex_irq_wakeup_handler, IRQF_TRIGGER_LOW,
1606 "wifi_wake", adapter);
1607 if (ret) {
1608 dev_err(dev, "Failed to request irq_wakeup %d (%d)\n",
1609 adapter->irq_wakeup, ret);
1610 goto err_exit;
1611 }
1612
1613 disable_irq(adapter->irq_wakeup);
1614 if (device_init_wakeup(dev, true)) {
1615 dev_err(dev, "fail to init wakeup for mwifiex\n");
1616 goto err_exit;
1617 }
1618 return;
1619
1620 err_exit:
1621 adapter->irq_wakeup = -1;
1622 }
1623
1624 /*
1625 * This function adds the card.
1626 *
1627 * This function follows the following major steps to set up the device -
1628 * - Initialize software. This includes probing the card, registering
1629 * the interface operations table, and allocating/initializing the
1630 * adapter structure
1631 * - Set up the netlink socket
1632 * - Create and start the main work queue
1633 * - Register the device
1634 * - Initialize firmware and hardware
1635 * - Add logical interfaces
1636 */
1637 int
mwifiex_add_card(void * card,struct completion * fw_done,struct mwifiex_if_ops * if_ops,u8 iface_type,struct device * dev)1638 mwifiex_add_card(void *card, struct completion *fw_done,
1639 struct mwifiex_if_ops *if_ops, u8 iface_type,
1640 struct device *dev)
1641 {
1642 struct mwifiex_adapter *adapter;
1643
1644 if (mwifiex_register(card, dev, if_ops, (void **)&adapter)) {
1645 pr_err("%s: software init failed\n", __func__);
1646 goto err_init_sw;
1647 }
1648
1649 mwifiex_probe_of(adapter);
1650
1651 adapter->iface_type = iface_type;
1652 adapter->fw_done = fw_done;
1653
1654 adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
1655 clear_bit(MWIFIEX_SURPRISE_REMOVED, &adapter->work_flags);
1656 init_waitqueue_head(&adapter->init_wait_q);
1657 clear_bit(MWIFIEX_IS_SUSPENDED, &adapter->work_flags);
1658 adapter->hs_activated = false;
1659 init_waitqueue_head(&adapter->hs_activate_wait_q);
1660 init_waitqueue_head(&adapter->cmd_wait_q.wait);
1661 adapter->cmd_wait_q.status = 0;
1662 adapter->scan_wait_q_woken = false;
1663
1664 if ((num_possible_cpus() > 1) || adapter->iface_type == MWIFIEX_USB)
1665 adapter->rx_work_enabled = true;
1666
1667 adapter->workqueue =
1668 alloc_workqueue("MWIFIEX_WORK_QUEUE",
1669 WQ_HIGHPRI | WQ_MEM_RECLAIM | WQ_UNBOUND, 1);
1670 if (!adapter->workqueue)
1671 goto err_kmalloc;
1672
1673 INIT_WORK(&adapter->main_work, mwifiex_main_work_queue);
1674
1675 if (adapter->rx_work_enabled) {
1676 adapter->rx_workqueue = alloc_workqueue("MWIFIEX_RX_WORK_QUEUE",
1677 WQ_HIGHPRI |
1678 WQ_MEM_RECLAIM |
1679 WQ_UNBOUND, 1);
1680 if (!adapter->rx_workqueue)
1681 goto err_kmalloc;
1682
1683 INIT_WORK(&adapter->rx_work, mwifiex_rx_work_queue);
1684 }
1685
1686 /* Register the device. Fill up the private data structure with relevant
1687 information from the card. */
1688 if (adapter->if_ops.register_dev(adapter)) {
1689 pr_err("%s: failed to register mwifiex device\n", __func__);
1690 goto err_registerdev;
1691 }
1692
1693 if (mwifiex_init_hw_fw(adapter, true)) {
1694 pr_err("%s: firmware init failed\n", __func__);
1695 goto err_init_fw;
1696 }
1697
1698 return 0;
1699
1700 err_init_fw:
1701 pr_debug("info: %s: unregister device\n", __func__);
1702 if (adapter->if_ops.unregister_dev)
1703 adapter->if_ops.unregister_dev(adapter);
1704 err_registerdev:
1705 set_bit(MWIFIEX_SURPRISE_REMOVED, &adapter->work_flags);
1706 mwifiex_terminate_workqueue(adapter);
1707 if (adapter->hw_status == MWIFIEX_HW_STATUS_READY) {
1708 pr_debug("info: %s: shutdown mwifiex\n", __func__);
1709 mwifiex_shutdown_drv(adapter);
1710 mwifiex_free_cmd_buffers(adapter);
1711 }
1712 err_kmalloc:
1713 if (adapter->irq_wakeup >= 0)
1714 device_init_wakeup(adapter->dev, false);
1715 mwifiex_free_adapter(adapter);
1716
1717 err_init_sw:
1718
1719 return -1;
1720 }
1721 EXPORT_SYMBOL_GPL(mwifiex_add_card);
1722
1723 /*
1724 * This function removes the card.
1725 *
1726 * This function follows the following major steps to remove the device -
1727 * - Stop data traffic
1728 * - Shutdown firmware
1729 * - Remove the logical interfaces
1730 * - Terminate the work queue
1731 * - Unregister the device
1732 * - Free the adapter structure
1733 */
mwifiex_remove_card(struct mwifiex_adapter * adapter)1734 int mwifiex_remove_card(struct mwifiex_adapter *adapter)
1735 {
1736 if (!adapter)
1737 return 0;
1738
1739 mwifiex_uninit_sw(adapter);
1740
1741 if (adapter->irq_wakeup >= 0)
1742 device_init_wakeup(adapter->dev, false);
1743
1744 /* Unregister device */
1745 mwifiex_dbg(adapter, INFO,
1746 "info: unregister device\n");
1747 if (adapter->if_ops.unregister_dev)
1748 adapter->if_ops.unregister_dev(adapter);
1749 /* Free adapter structure */
1750 mwifiex_dbg(adapter, INFO,
1751 "info: free adapter\n");
1752 mwifiex_free_adapter(adapter);
1753
1754 return 0;
1755 }
1756 EXPORT_SYMBOL_GPL(mwifiex_remove_card);
1757
_mwifiex_dbg(const struct mwifiex_adapter * adapter,int mask,const char * fmt,...)1758 void _mwifiex_dbg(const struct mwifiex_adapter *adapter, int mask,
1759 const char *fmt, ...)
1760 {
1761 struct va_format vaf;
1762 va_list args;
1763
1764 if (!(adapter->debug_mask & mask))
1765 return;
1766
1767 va_start(args, fmt);
1768
1769 vaf.fmt = fmt;
1770 vaf.va = &args;
1771
1772 if (adapter->dev)
1773 dev_info(adapter->dev, "%pV", &vaf);
1774 else
1775 pr_info("%pV", &vaf);
1776
1777 va_end(args);
1778 }
1779 EXPORT_SYMBOL_GPL(_mwifiex_dbg);
1780
1781 /*
1782 * This function initializes the module.
1783 *
1784 * The debug FS is also initialized if configured.
1785 */
1786 static int
mwifiex_init_module(void)1787 mwifiex_init_module(void)
1788 {
1789 #ifdef CONFIG_DEBUG_FS
1790 mwifiex_debugfs_init();
1791 #endif
1792 return 0;
1793 }
1794
1795 /*
1796 * This function cleans up the module.
1797 *
1798 * The debug FS is removed if available.
1799 */
1800 static void
mwifiex_cleanup_module(void)1801 mwifiex_cleanup_module(void)
1802 {
1803 #ifdef CONFIG_DEBUG_FS
1804 mwifiex_debugfs_remove();
1805 #endif
1806 }
1807
1808 module_init(mwifiex_init_module);
1809 module_exit(mwifiex_cleanup_module);
1810
1811 MODULE_AUTHOR("Marvell International Ltd.");
1812 MODULE_DESCRIPTION("Marvell WiFi-Ex Driver version " VERSION);
1813 MODULE_VERSION(VERSION);
1814 MODULE_LICENSE("GPL v2");
1815
