1 /*
2 * NXP Wireless LAN device driver: major functions
3 *
4 * Copyright 2011-2020 NXP
5 *
6 * This software file (the "File") is distributed by NXP
7 * 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 const u16 mwifiex_1d_to_wmm_queue[8] = { 1, 0, 0, 1, 2, 2, 3, 3 };
52
53 /*
54 * This function registers the device and performs all the necessary
55 * initializations.
56 *
57 * The following initialization operations are performed -
58 * - Allocate adapter structure
59 * - Save interface specific operations table in adapter
60 * - Call interface specific initialization routine
61 * - Allocate private structures
62 * - Set default adapter structure parameters
63 * - Initialize locks
64 *
65 * In case of any errors during inittialization, this function also ensures
66 * proper cleanup before exiting.
67 */
mwifiex_register(void * card,struct device * dev,struct mwifiex_if_ops * if_ops,void ** padapter)68 static int mwifiex_register(void *card, struct device *dev,
69 struct mwifiex_if_ops *if_ops, void **padapter)
70 {
71 struct mwifiex_adapter *adapter;
72 int i;
73
74 adapter = kzalloc(sizeof(struct mwifiex_adapter), GFP_KERNEL);
75 if (!adapter)
76 return -ENOMEM;
77
78 *padapter = adapter;
79 adapter->dev = dev;
80 adapter->card = card;
81
82 /* Save interface specific operations in adapter */
83 memmove(&adapter->if_ops, if_ops, sizeof(struct mwifiex_if_ops));
84 adapter->debug_mask = debug_mask;
85
86 /* card specific initialization has been deferred until now .. */
87 if (adapter->if_ops.init_if)
88 if (adapter->if_ops.init_if(adapter))
89 goto error;
90
91 adapter->priv_num = 0;
92
93 for (i = 0; i < MWIFIEX_MAX_BSS_NUM; i++) {
94 /* Allocate memory for private structure */
95 adapter->priv[i] =
96 kzalloc(sizeof(struct mwifiex_private), GFP_KERNEL);
97 if (!adapter->priv[i])
98 goto error;
99
100 adapter->priv[i]->adapter = adapter;
101 adapter->priv_num++;
102 }
103 mwifiex_init_lock_list(adapter);
104
105 timer_setup(&adapter->cmd_timer, mwifiex_cmd_timeout_func, 0);
106
107 return 0;
108
109 error:
110 mwifiex_dbg(adapter, ERROR,
111 "info: leave mwifiex_register with error\n");
112
113 for (i = 0; i < adapter->priv_num; i++)
114 kfree(adapter->priv[i]);
115
116 kfree(adapter);
117
118 return -1;
119 }
120
121 /*
122 * This function unregisters the device and performs all the necessary
123 * cleanups.
124 *
125 * The following cleanup operations are performed -
126 * - Free the timers
127 * - Free beacon buffers
128 * - Free private structures
129 * - Free adapter structure
130 */
mwifiex_unregister(struct mwifiex_adapter * adapter)131 static int mwifiex_unregister(struct mwifiex_adapter *adapter)
132 {
133 s32 i;
134
135 if (adapter->if_ops.cleanup_if)
136 adapter->if_ops.cleanup_if(adapter);
137
138 del_timer_sync(&adapter->cmd_timer);
139
140 /* Free private structures */
141 for (i = 0; i < adapter->priv_num; i++) {
142 if (adapter->priv[i]) {
143 mwifiex_free_curr_bcn(adapter->priv[i]);
144 kfree(adapter->priv[i]);
145 }
146 }
147
148 if (adapter->nd_info) {
149 for (i = 0 ; i < adapter->nd_info->n_matches ; i++)
150 kfree(adapter->nd_info->matches[i]);
151 kfree(adapter->nd_info);
152 adapter->nd_info = NULL;
153 }
154
155 kfree(adapter->regd);
156
157 kfree(adapter);
158 return 0;
159 }
160
mwifiex_queue_main_work(struct mwifiex_adapter * adapter)161 void mwifiex_queue_main_work(struct mwifiex_adapter *adapter)
162 {
163 unsigned long flags;
164
165 spin_lock_irqsave(&adapter->main_proc_lock, flags);
166 if (adapter->mwifiex_processing) {
167 adapter->more_task_flag = true;
168 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
169 } else {
170 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
171 queue_work(adapter->workqueue, &adapter->main_work);
172 }
173 }
174 EXPORT_SYMBOL_GPL(mwifiex_queue_main_work);
175
mwifiex_queue_rx_work(struct mwifiex_adapter * adapter)176 static void mwifiex_queue_rx_work(struct mwifiex_adapter *adapter)
177 {
178 spin_lock_bh(&adapter->rx_proc_lock);
179 if (adapter->rx_processing) {
180 spin_unlock_bh(&adapter->rx_proc_lock);
181 } else {
182 spin_unlock_bh(&adapter->rx_proc_lock);
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 struct sk_buff *skb;
190 struct mwifiex_rxinfo *rx_info;
191
192 spin_lock_bh(&adapter->rx_proc_lock);
193 if (adapter->rx_processing || adapter->rx_locked) {
194 spin_unlock_bh(&adapter->rx_proc_lock);
195 goto exit_rx_proc;
196 } else {
197 adapter->rx_processing = true;
198 spin_unlock_bh(&adapter->rx_proc_lock);
199 }
200
201 /* Check for Rx data */
202 while ((skb = skb_dequeue(&adapter->rx_data_q))) {
203 atomic_dec(&adapter->rx_pending);
204 if ((adapter->delay_main_work ||
205 adapter->iface_type == MWIFIEX_USB) &&
206 (atomic_read(&adapter->rx_pending) < LOW_RX_PENDING)) {
207 if (adapter->if_ops.submit_rem_rx_urbs)
208 adapter->if_ops.submit_rem_rx_urbs(adapter);
209 adapter->delay_main_work = false;
210 mwifiex_queue_main_work(adapter);
211 }
212 rx_info = MWIFIEX_SKB_RXCB(skb);
213 if (rx_info->buf_type == MWIFIEX_TYPE_AGGR_DATA) {
214 if (adapter->if_ops.deaggr_pkt)
215 adapter->if_ops.deaggr_pkt(adapter, skb);
216 dev_kfree_skb_any(skb);
217 } else {
218 mwifiex_handle_rx_packet(adapter, skb);
219 }
220 }
221 spin_lock_bh(&adapter->rx_proc_lock);
222 adapter->rx_processing = false;
223 spin_unlock_bh(&adapter->rx_proc_lock);
224
225 exit_rx_proc:
226 return 0;
227 }
228
229 /*
230 * The main process.
231 *
232 * This function is the main procedure of the driver and handles various driver
233 * operations. It runs in a loop and provides the core functionalities.
234 *
235 * The main responsibilities of this function are -
236 * - Ensure concurrency control
237 * - Handle pending interrupts and call interrupt handlers
238 * - Wake up the card if required
239 * - Handle command responses and call response handlers
240 * - Handle events and call event handlers
241 * - Execute pending commands
242 * - Transmit pending data packets
243 */
mwifiex_main_process(struct mwifiex_adapter * adapter)244 int mwifiex_main_process(struct mwifiex_adapter *adapter)
245 {
246 int ret = 0;
247 unsigned long flags;
248
249 spin_lock_irqsave(&adapter->main_proc_lock, flags);
250
251 /* Check if already processing */
252 if (adapter->mwifiex_processing || adapter->main_locked) {
253 adapter->more_task_flag = true;
254 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
255 return 0;
256 } else {
257 adapter->mwifiex_processing = true;
258 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
259 }
260 process_start:
261 do {
262 if (adapter->hw_status == MWIFIEX_HW_STATUS_NOT_READY)
263 break;
264
265 /* For non-USB interfaces, If we process interrupts first, it
266 * would increase RX pending even further. Avoid this by
267 * checking if rx_pending has crossed high threshold and
268 * schedule rx work queue and then process interrupts.
269 * For USB interface, there are no interrupts. We already have
270 * HIGH_RX_PENDING check in usb.c
271 */
272 if (atomic_read(&adapter->rx_pending) >= HIGH_RX_PENDING &&
273 adapter->iface_type != MWIFIEX_USB) {
274 adapter->delay_main_work = true;
275 mwifiex_queue_rx_work(adapter);
276 break;
277 }
278
279 /* Handle pending interrupt if any */
280 if (adapter->int_status) {
281 if (adapter->hs_activated)
282 mwifiex_process_hs_config(adapter);
283 if (adapter->if_ops.process_int_status)
284 adapter->if_ops.process_int_status(adapter);
285 }
286
287 if (adapter->rx_work_enabled && adapter->data_received)
288 mwifiex_queue_rx_work(adapter);
289
290 /* Need to wake up the card ? */
291 if ((adapter->ps_state == PS_STATE_SLEEP) &&
292 (adapter->pm_wakeup_card_req &&
293 !adapter->pm_wakeup_fw_try) &&
294 (is_command_pending(adapter) ||
295 !skb_queue_empty(&adapter->tx_data_q) ||
296 !mwifiex_bypass_txlist_empty(adapter) ||
297 !mwifiex_wmm_lists_empty(adapter))) {
298 adapter->pm_wakeup_fw_try = true;
299 mod_timer(&adapter->wakeup_timer, jiffies + (HZ*3));
300 adapter->if_ops.wakeup(adapter);
301 continue;
302 }
303
304 if (IS_CARD_RX_RCVD(adapter)) {
305 adapter->data_received = false;
306 adapter->pm_wakeup_fw_try = false;
307 del_timer(&adapter->wakeup_timer);
308 if (adapter->ps_state == PS_STATE_SLEEP)
309 adapter->ps_state = PS_STATE_AWAKE;
310 } else {
311 /* We have tried to wakeup the card already */
312 if (adapter->pm_wakeup_fw_try)
313 break;
314 if (adapter->ps_state == PS_STATE_PRE_SLEEP)
315 mwifiex_check_ps_cond(adapter);
316
317 if (adapter->ps_state != PS_STATE_AWAKE)
318 break;
319 if (adapter->tx_lock_flag) {
320 if (adapter->iface_type == MWIFIEX_USB) {
321 if (!adapter->usb_mc_setup)
322 break;
323 } else
324 break;
325 }
326
327 if ((!adapter->scan_chan_gap_enabled &&
328 adapter->scan_processing) || adapter->data_sent ||
329 mwifiex_is_tdls_chan_switching
330 (mwifiex_get_priv(adapter,
331 MWIFIEX_BSS_ROLE_STA)) ||
332 (mwifiex_wmm_lists_empty(adapter) &&
333 mwifiex_bypass_txlist_empty(adapter) &&
334 skb_queue_empty(&adapter->tx_data_q))) {
335 if (adapter->cmd_sent || adapter->curr_cmd ||
336 !mwifiex_is_send_cmd_allowed
337 (mwifiex_get_priv(adapter,
338 MWIFIEX_BSS_ROLE_STA)) ||
339 (!is_command_pending(adapter)))
340 break;
341 }
342 }
343
344 /* Check for event */
345 if (adapter->event_received) {
346 adapter->event_received = false;
347 mwifiex_process_event(adapter);
348 }
349
350 /* Check for Cmd Resp */
351 if (adapter->cmd_resp_received) {
352 adapter->cmd_resp_received = false;
353 mwifiex_process_cmdresp(adapter);
354
355 /* call mwifiex back when init_fw is done */
356 if (adapter->hw_status == MWIFIEX_HW_STATUS_INIT_DONE) {
357 adapter->hw_status = MWIFIEX_HW_STATUS_READY;
358 mwifiex_init_fw_complete(adapter);
359 }
360 }
361
362 /* Check if we need to confirm Sleep Request
363 received previously */
364 if (adapter->ps_state == PS_STATE_PRE_SLEEP)
365 mwifiex_check_ps_cond(adapter);
366
367 /* * The ps_state may have been changed during processing of
368 * Sleep Request event.
369 */
370 if ((adapter->ps_state == PS_STATE_SLEEP) ||
371 (adapter->ps_state == PS_STATE_PRE_SLEEP) ||
372 (adapter->ps_state == PS_STATE_SLEEP_CFM)) {
373 continue;
374 }
375
376 if (adapter->tx_lock_flag) {
377 if (adapter->iface_type == MWIFIEX_USB) {
378 if (!adapter->usb_mc_setup)
379 continue;
380 } else
381 continue;
382 }
383
384 if (!adapter->cmd_sent && !adapter->curr_cmd &&
385 mwifiex_is_send_cmd_allowed
386 (mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA))) {
387 if (mwifiex_exec_next_cmd(adapter) == -1) {
388 ret = -1;
389 break;
390 }
391 }
392
393 /** If USB Multi channel setup ongoing,
394 * wait for ready to tx data.
395 */
396 if (adapter->iface_type == MWIFIEX_USB &&
397 adapter->usb_mc_setup)
398 continue;
399
400 if ((adapter->scan_chan_gap_enabled ||
401 !adapter->scan_processing) &&
402 !adapter->data_sent &&
403 !skb_queue_empty(&adapter->tx_data_q)) {
404 mwifiex_process_tx_queue(adapter);
405 if (adapter->hs_activated) {
406 clear_bit(MWIFIEX_IS_HS_CONFIGURED,
407 &adapter->work_flags);
408 mwifiex_hs_activated_event
409 (mwifiex_get_priv
410 (adapter, MWIFIEX_BSS_ROLE_ANY),
411 false);
412 }
413 }
414
415 if ((adapter->scan_chan_gap_enabled ||
416 !adapter->scan_processing) &&
417 !adapter->data_sent &&
418 !mwifiex_bypass_txlist_empty(adapter) &&
419 !mwifiex_is_tdls_chan_switching
420 (mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA))) {
421 mwifiex_process_bypass_tx(adapter);
422 if (adapter->hs_activated) {
423 clear_bit(MWIFIEX_IS_HS_CONFIGURED,
424 &adapter->work_flags);
425 mwifiex_hs_activated_event
426 (mwifiex_get_priv
427 (adapter, MWIFIEX_BSS_ROLE_ANY),
428 false);
429 }
430 }
431
432 if ((adapter->scan_chan_gap_enabled ||
433 !adapter->scan_processing) &&
434 !adapter->data_sent && !mwifiex_wmm_lists_empty(adapter) &&
435 !mwifiex_is_tdls_chan_switching
436 (mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA))) {
437 mwifiex_wmm_process_tx(adapter);
438 if (adapter->hs_activated) {
439 clear_bit(MWIFIEX_IS_HS_CONFIGURED,
440 &adapter->work_flags);
441 mwifiex_hs_activated_event
442 (mwifiex_get_priv
443 (adapter, MWIFIEX_BSS_ROLE_ANY),
444 false);
445 }
446 }
447
448 if (adapter->delay_null_pkt && !adapter->cmd_sent &&
449 !adapter->curr_cmd && !is_command_pending(adapter) &&
450 (mwifiex_wmm_lists_empty(adapter) &&
451 mwifiex_bypass_txlist_empty(adapter) &&
452 skb_queue_empty(&adapter->tx_data_q))) {
453 if (!mwifiex_send_null_packet
454 (mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA),
455 MWIFIEX_TxPD_POWER_MGMT_NULL_PACKET |
456 MWIFIEX_TxPD_POWER_MGMT_LAST_PACKET)) {
457 adapter->delay_null_pkt = false;
458 adapter->ps_state = PS_STATE_SLEEP;
459 }
460 break;
461 }
462 } while (true);
463
464 spin_lock_irqsave(&adapter->main_proc_lock, flags);
465 if (adapter->more_task_flag) {
466 adapter->more_task_flag = false;
467 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
468 goto process_start;
469 }
470 adapter->mwifiex_processing = false;
471 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
472
473 return ret;
474 }
475 EXPORT_SYMBOL_GPL(mwifiex_main_process);
476
477 /*
478 * This function frees the adapter structure.
479 *
480 * Additionally, this closes the netlink socket, frees the timers
481 * and private structures.
482 */
mwifiex_free_adapter(struct mwifiex_adapter * adapter)483 static void mwifiex_free_adapter(struct mwifiex_adapter *adapter)
484 {
485 if (!adapter) {
486 pr_err("%s: adapter is NULL\n", __func__);
487 return;
488 }
489
490 mwifiex_unregister(adapter);
491 pr_debug("info: %s: free adapter\n", __func__);
492 }
493
494 /*
495 * This function cancels all works in the queue and destroys
496 * the main workqueue.
497 */
mwifiex_terminate_workqueue(struct mwifiex_adapter * adapter)498 static void mwifiex_terminate_workqueue(struct mwifiex_adapter *adapter)
499 {
500 if (adapter->workqueue) {
501 flush_workqueue(adapter->workqueue);
502 destroy_workqueue(adapter->workqueue);
503 adapter->workqueue = NULL;
504 }
505
506 if (adapter->rx_workqueue) {
507 flush_workqueue(adapter->rx_workqueue);
508 destroy_workqueue(adapter->rx_workqueue);
509 adapter->rx_workqueue = NULL;
510 }
511 }
512
513 /*
514 * This function gets firmware and initializes it.
515 *
516 * The main initialization steps followed are -
517 * - Download the correct firmware to card
518 * - Issue the init commands to firmware
519 */
_mwifiex_fw_dpc(const struct firmware * firmware,void * context)520 static int _mwifiex_fw_dpc(const struct firmware *firmware, void *context)
521 {
522 int ret;
523 char fmt[64];
524 struct mwifiex_adapter *adapter = context;
525 struct mwifiex_fw_image fw;
526 bool init_failed = false;
527 struct wireless_dev *wdev;
528 struct completion *fw_done = adapter->fw_done;
529
530 if (!firmware) {
531 mwifiex_dbg(adapter, ERROR,
532 "Failed to get firmware %s\n", adapter->fw_name);
533 goto err_dnld_fw;
534 }
535
536 memset(&fw, 0, sizeof(struct mwifiex_fw_image));
537 adapter->firmware = firmware;
538 fw.fw_buf = (u8 *) adapter->firmware->data;
539 fw.fw_len = adapter->firmware->size;
540
541 if (adapter->if_ops.dnld_fw) {
542 ret = adapter->if_ops.dnld_fw(adapter, &fw);
543 } else {
544 ret = mwifiex_dnld_fw(adapter, &fw);
545 }
546
547 if (ret == -1)
548 goto err_dnld_fw;
549
550 mwifiex_dbg(adapter, MSG, "WLAN FW is active\n");
551
552 if (cal_data_cfg) {
553 if ((request_firmware(&adapter->cal_data, cal_data_cfg,
554 adapter->dev)) < 0)
555 mwifiex_dbg(adapter, ERROR,
556 "Cal data request_firmware() failed\n");
557 }
558
559 /* enable host interrupt after fw dnld is successful */
560 if (adapter->if_ops.enable_int) {
561 if (adapter->if_ops.enable_int(adapter))
562 goto err_dnld_fw;
563 }
564
565 adapter->init_wait_q_woken = false;
566 ret = mwifiex_init_fw(adapter);
567 if (ret == -1) {
568 goto err_init_fw;
569 } else if (!ret) {
570 adapter->hw_status = MWIFIEX_HW_STATUS_READY;
571 goto done;
572 }
573 /* Wait for mwifiex_init to complete */
574 if (!adapter->mfg_mode) {
575 wait_event_interruptible(adapter->init_wait_q,
576 adapter->init_wait_q_woken);
577 if (adapter->hw_status != MWIFIEX_HW_STATUS_READY)
578 goto err_init_fw;
579 }
580
581 if (!adapter->wiphy) {
582 if (mwifiex_register_cfg80211(adapter)) {
583 mwifiex_dbg(adapter, ERROR,
584 "cannot register with cfg80211\n");
585 goto err_init_fw;
586 }
587 }
588
589 if (mwifiex_init_channel_scan_gap(adapter)) {
590 mwifiex_dbg(adapter, ERROR,
591 "could not init channel stats table\n");
592 goto err_init_chan_scan;
593 }
594
595 if (driver_mode) {
596 driver_mode &= MWIFIEX_DRIVER_MODE_BITMASK;
597 driver_mode |= MWIFIEX_DRIVER_MODE_STA;
598 }
599
600 rtnl_lock();
601 /* Create station interface by default */
602 wdev = mwifiex_add_virtual_intf(adapter->wiphy, "mlan%d", NET_NAME_ENUM,
603 NL80211_IFTYPE_STATION, NULL);
604 if (IS_ERR(wdev)) {
605 mwifiex_dbg(adapter, ERROR,
606 "cannot create default STA interface\n");
607 rtnl_unlock();
608 goto err_add_intf;
609 }
610
611 if (driver_mode & MWIFIEX_DRIVER_MODE_UAP) {
612 wdev = mwifiex_add_virtual_intf(adapter->wiphy, "uap%d", NET_NAME_ENUM,
613 NL80211_IFTYPE_AP, NULL);
614 if (IS_ERR(wdev)) {
615 mwifiex_dbg(adapter, ERROR,
616 "cannot create AP interface\n");
617 rtnl_unlock();
618 goto err_add_intf;
619 }
620 }
621
622 if (driver_mode & MWIFIEX_DRIVER_MODE_P2P) {
623 wdev = mwifiex_add_virtual_intf(adapter->wiphy, "p2p%d", NET_NAME_ENUM,
624 NL80211_IFTYPE_P2P_CLIENT, NULL);
625 if (IS_ERR(wdev)) {
626 mwifiex_dbg(adapter, ERROR,
627 "cannot create p2p client interface\n");
628 rtnl_unlock();
629 goto err_add_intf;
630 }
631 }
632 rtnl_unlock();
633
634 mwifiex_drv_get_driver_version(adapter, fmt, sizeof(fmt) - 1);
635 mwifiex_dbg(adapter, MSG, "driver_version = %s\n", fmt);
636 adapter->is_up = true;
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 int id;
829
830 spin_lock_bh(&priv->ack_status_lock);
831 id = idr_alloc(&priv->ack_status_frames, orig_skb,
832 1, 0x10, GFP_ATOMIC);
833 spin_unlock_bh(&priv->ack_status_lock);
834
835 if (id >= 0) {
836 tx_info = MWIFIEX_SKB_TXCB(skb);
837 tx_info->ack_frame_id = id;
838 tx_info->flags |= flag;
839 orig_tx_info = MWIFIEX_SKB_TXCB(orig_skb);
840 orig_tx_info->ack_frame_id = id;
841 orig_tx_info->flags |= flag;
842
843 if (flag == MWIFIEX_BUF_FLAG_ACTION_TX_STATUS && cookie)
844 orig_tx_info->cookie = *cookie;
845
846 } else if (skb_shared(skb)) {
847 kfree_skb(orig_skb);
848 } else {
849 kfree_skb(skb);
850 skb = orig_skb;
851 }
852 } else {
853 /* couldn't clone -- lose tx status ... */
854 skb = orig_skb;
855 }
856
857 return skb;
858 }
859
860 /*
861 * CFG802.11 network device handler for data transmission.
862 */
863 static netdev_tx_t
mwifiex_hard_start_xmit(struct sk_buff * skb,struct net_device * dev)864 mwifiex_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
865 {
866 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
867 struct sk_buff *new_skb;
868 struct mwifiex_txinfo *tx_info;
869 bool multicast;
870
871 mwifiex_dbg(priv->adapter, DATA,
872 "data: %lu BSS(%d-%d): Data <= kernel\n",
873 jiffies, priv->bss_type, priv->bss_num);
874
875 if (test_bit(MWIFIEX_SURPRISE_REMOVED, &priv->adapter->work_flags)) {
876 kfree_skb(skb);
877 priv->stats.tx_dropped++;
878 return 0;
879 }
880 if (!skb->len || (skb->len > ETH_FRAME_LEN)) {
881 mwifiex_dbg(priv->adapter, ERROR,
882 "Tx: bad skb len %d\n", skb->len);
883 kfree_skb(skb);
884 priv->stats.tx_dropped++;
885 return 0;
886 }
887 if (skb_headroom(skb) < MWIFIEX_MIN_DATA_HEADER_LEN) {
888 mwifiex_dbg(priv->adapter, DATA,
889 "data: Tx: insufficient skb headroom %d\n",
890 skb_headroom(skb));
891 /* Insufficient skb headroom - allocate a new skb */
892 new_skb =
893 skb_realloc_headroom(skb, MWIFIEX_MIN_DATA_HEADER_LEN);
894 if (unlikely(!new_skb)) {
895 mwifiex_dbg(priv->adapter, ERROR,
896 "Tx: cannot alloca new_skb\n");
897 kfree_skb(skb);
898 priv->stats.tx_dropped++;
899 return 0;
900 }
901 kfree_skb(skb);
902 skb = new_skb;
903 mwifiex_dbg(priv->adapter, INFO,
904 "info: new skb headroomd %d\n",
905 skb_headroom(skb));
906 }
907
908 tx_info = MWIFIEX_SKB_TXCB(skb);
909 memset(tx_info, 0, sizeof(*tx_info));
910 tx_info->bss_num = priv->bss_num;
911 tx_info->bss_type = priv->bss_type;
912 tx_info->pkt_len = skb->len;
913
914 multicast = is_multicast_ether_addr(skb->data);
915
916 if (unlikely(!multicast && skb->sk &&
917 skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS &&
918 priv->adapter->fw_api_ver == MWIFIEX_FW_V15))
919 skb = mwifiex_clone_skb_for_tx_status(priv,
920 skb,
921 MWIFIEX_BUF_FLAG_EAPOL_TX_STATUS, NULL);
922
923 /* Record the current time the packet was queued; used to
924 * determine the amount of time the packet was queued in
925 * the driver before it was sent to the firmware.
926 * The delay is then sent along with the packet to the
927 * firmware for aggregate delay calculation for stats and
928 * MSDU lifetime expiry.
929 */
930 __net_timestamp(skb);
931
932 if (ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) &&
933 priv->bss_type == MWIFIEX_BSS_TYPE_STA &&
934 !ether_addr_equal_unaligned(priv->cfg_bssid, skb->data)) {
935 if (priv->adapter->auto_tdls && priv->check_tdls_tx)
936 mwifiex_tdls_check_tx(priv, skb);
937 }
938
939 mwifiex_queue_tx_pkt(priv, skb);
940
941 return 0;
942 }
943
mwifiex_set_mac_address(struct mwifiex_private * priv,struct net_device * dev,bool external,u8 * new_mac)944 int mwifiex_set_mac_address(struct mwifiex_private *priv,
945 struct net_device *dev, bool external,
946 u8 *new_mac)
947 {
948 int ret;
949 u64 mac_addr, old_mac_addr;
950
951 old_mac_addr = ether_addr_to_u64(priv->curr_addr);
952
953 if (external) {
954 mac_addr = ether_addr_to_u64(new_mac);
955 } else {
956 /* Internal mac address change */
957 if (priv->bss_type == MWIFIEX_BSS_TYPE_ANY)
958 return -EOPNOTSUPP;
959
960 mac_addr = old_mac_addr;
961
962 if (priv->bss_type == MWIFIEX_BSS_TYPE_P2P) {
963 mac_addr |= BIT_ULL(MWIFIEX_MAC_LOCAL_ADMIN_BIT);
964 mac_addr += priv->bss_num;
965 } else if (priv->adapter->priv[0] != priv) {
966 /* Set mac address based on bss_type/bss_num */
967 mac_addr ^= BIT_ULL(priv->bss_type + 8);
968 mac_addr += priv->bss_num;
969 }
970 }
971
972 u64_to_ether_addr(mac_addr, priv->curr_addr);
973
974 /* Send request to firmware */
975 ret = mwifiex_send_cmd(priv, HostCmd_CMD_802_11_MAC_ADDRESS,
976 HostCmd_ACT_GEN_SET, 0, NULL, true);
977
978 if (ret) {
979 u64_to_ether_addr(old_mac_addr, priv->curr_addr);
980 mwifiex_dbg(priv->adapter, ERROR,
981 "set mac address failed: ret=%d\n", ret);
982 return ret;
983 }
984
985 ether_addr_copy(dev->dev_addr, priv->curr_addr);
986 return 0;
987 }
988
989 /* CFG802.11 network device handler for setting MAC address.
990 */
991 static int
mwifiex_ndo_set_mac_address(struct net_device * dev,void * addr)992 mwifiex_ndo_set_mac_address(struct net_device *dev, void *addr)
993 {
994 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
995 struct sockaddr *hw_addr = addr;
996
997 return mwifiex_set_mac_address(priv, dev, true, hw_addr->sa_data);
998 }
999
1000 /*
1001 * CFG802.11 network device handler for setting multicast list.
1002 */
mwifiex_set_multicast_list(struct net_device * dev)1003 static void mwifiex_set_multicast_list(struct net_device *dev)
1004 {
1005 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
1006 struct mwifiex_multicast_list mcast_list;
1007
1008 if (dev->flags & IFF_PROMISC) {
1009 mcast_list.mode = MWIFIEX_PROMISC_MODE;
1010 } else if (dev->flags & IFF_ALLMULTI ||
1011 netdev_mc_count(dev) > MWIFIEX_MAX_MULTICAST_LIST_SIZE) {
1012 mcast_list.mode = MWIFIEX_ALL_MULTI_MODE;
1013 } else {
1014 mcast_list.mode = MWIFIEX_MULTICAST_MODE;
1015 mcast_list.num_multicast_addr =
1016 mwifiex_copy_mcast_addr(&mcast_list, dev);
1017 }
1018 mwifiex_request_set_multicast_list(priv, &mcast_list);
1019 }
1020
1021 /*
1022 * CFG802.11 network device handler for transmission timeout.
1023 */
1024 static void
mwifiex_tx_timeout(struct net_device * dev,unsigned int txqueue)1025 mwifiex_tx_timeout(struct net_device *dev, unsigned int txqueue)
1026 {
1027 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
1028
1029 priv->num_tx_timeout++;
1030 priv->tx_timeout_cnt++;
1031 mwifiex_dbg(priv->adapter, ERROR,
1032 "%lu : Tx timeout(#%d), bss_type-num = %d-%d\n",
1033 jiffies, priv->tx_timeout_cnt, priv->bss_type,
1034 priv->bss_num);
1035 mwifiex_set_trans_start(dev);
1036
1037 if (priv->tx_timeout_cnt > TX_TIMEOUT_THRESHOLD &&
1038 priv->adapter->if_ops.card_reset) {
1039 mwifiex_dbg(priv->adapter, ERROR,
1040 "tx_timeout_cnt exceeds threshold.\t"
1041 "Triggering card reset!\n");
1042 priv->adapter->if_ops.card_reset(priv->adapter);
1043 }
1044 }
1045
mwifiex_multi_chan_resync(struct mwifiex_adapter * adapter)1046 void mwifiex_multi_chan_resync(struct mwifiex_adapter *adapter)
1047 {
1048 struct usb_card_rec *card = adapter->card;
1049 struct mwifiex_private *priv;
1050 u16 tx_buf_size;
1051 int i, ret;
1052
1053 card->mc_resync_flag = true;
1054 for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++) {
1055 if (atomic_read(&card->port[i].tx_data_urb_pending)) {
1056 mwifiex_dbg(adapter, WARN, "pending data urb in sys\n");
1057 return;
1058 }
1059 }
1060
1061 card->mc_resync_flag = false;
1062 tx_buf_size = 0xffff;
1063 priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
1064 ret = mwifiex_send_cmd(priv, HostCmd_CMD_RECONFIGURE_TX_BUFF,
1065 HostCmd_ACT_GEN_SET, 0, &tx_buf_size, false);
1066 if (ret)
1067 mwifiex_dbg(adapter, ERROR,
1068 "send reconfig tx buf size cmd err\n");
1069 }
1070 EXPORT_SYMBOL_GPL(mwifiex_multi_chan_resync);
1071
mwifiex_upload_device_dump(struct mwifiex_adapter * adapter)1072 void mwifiex_upload_device_dump(struct mwifiex_adapter *adapter)
1073 {
1074 /* Dump all the memory data into single file, a userspace script will
1075 * be used to split all the memory data to multiple files
1076 */
1077 mwifiex_dbg(adapter, MSG,
1078 "== mwifiex dump information to /sys/class/devcoredump start\n");
1079 dev_coredumpv(adapter->dev, adapter->devdump_data, adapter->devdump_len,
1080 GFP_KERNEL);
1081 mwifiex_dbg(adapter, MSG,
1082 "== mwifiex dump information to /sys/class/devcoredump end\n");
1083
1084 /* Device dump data will be freed in device coredump release function
1085 * after 5 min. Here reset adapter->devdump_data and ->devdump_len
1086 * to avoid it been accidentally reused.
1087 */
1088 adapter->devdump_data = NULL;
1089 adapter->devdump_len = 0;
1090 }
1091 EXPORT_SYMBOL_GPL(mwifiex_upload_device_dump);
1092
mwifiex_drv_info_dump(struct mwifiex_adapter * adapter)1093 void mwifiex_drv_info_dump(struct mwifiex_adapter *adapter)
1094 {
1095 char *p;
1096 char drv_version[64];
1097 struct usb_card_rec *cardp;
1098 struct sdio_mmc_card *sdio_card;
1099 struct mwifiex_private *priv;
1100 int i, idx;
1101 struct netdev_queue *txq;
1102 struct mwifiex_debug_info *debug_info;
1103
1104 mwifiex_dbg(adapter, MSG, "===mwifiex driverinfo dump start===\n");
1105
1106 p = adapter->devdump_data;
1107 strcpy(p, "========Start dump driverinfo========\n");
1108 p += strlen("========Start dump driverinfo========\n");
1109 p += sprintf(p, "driver_name = " "\"mwifiex\"\n");
1110
1111 mwifiex_drv_get_driver_version(adapter, drv_version,
1112 sizeof(drv_version) - 1);
1113 p += sprintf(p, "driver_version = %s\n", drv_version);
1114
1115 if (adapter->iface_type == MWIFIEX_USB) {
1116 cardp = (struct usb_card_rec *)adapter->card;
1117 p += sprintf(p, "tx_cmd_urb_pending = %d\n",
1118 atomic_read(&cardp->tx_cmd_urb_pending));
1119 p += sprintf(p, "tx_data_urb_pending_port_0 = %d\n",
1120 atomic_read(&cardp->port[0].tx_data_urb_pending));
1121 p += sprintf(p, "tx_data_urb_pending_port_1 = %d\n",
1122 atomic_read(&cardp->port[1].tx_data_urb_pending));
1123 p += sprintf(p, "rx_cmd_urb_pending = %d\n",
1124 atomic_read(&cardp->rx_cmd_urb_pending));
1125 p += sprintf(p, "rx_data_urb_pending = %d\n",
1126 atomic_read(&cardp->rx_data_urb_pending));
1127 }
1128
1129 p += sprintf(p, "tx_pending = %d\n",
1130 atomic_read(&adapter->tx_pending));
1131 p += sprintf(p, "rx_pending = %d\n",
1132 atomic_read(&adapter->rx_pending));
1133
1134 if (adapter->iface_type == MWIFIEX_SDIO) {
1135 sdio_card = (struct sdio_mmc_card *)adapter->card;
1136 p += sprintf(p, "\nmp_rd_bitmap=0x%x curr_rd_port=0x%x\n",
1137 sdio_card->mp_rd_bitmap, sdio_card->curr_rd_port);
1138 p += sprintf(p, "mp_wr_bitmap=0x%x curr_wr_port=0x%x\n",
1139 sdio_card->mp_wr_bitmap, sdio_card->curr_wr_port);
1140 }
1141
1142 for (i = 0; i < adapter->priv_num; i++) {
1143 if (!adapter->priv[i] || !adapter->priv[i]->netdev)
1144 continue;
1145 priv = adapter->priv[i];
1146 p += sprintf(p, "\n[interface : \"%s\"]\n",
1147 priv->netdev->name);
1148 p += sprintf(p, "wmm_tx_pending[0] = %d\n",
1149 atomic_read(&priv->wmm_tx_pending[0]));
1150 p += sprintf(p, "wmm_tx_pending[1] = %d\n",
1151 atomic_read(&priv->wmm_tx_pending[1]));
1152 p += sprintf(p, "wmm_tx_pending[2] = %d\n",
1153 atomic_read(&priv->wmm_tx_pending[2]));
1154 p += sprintf(p, "wmm_tx_pending[3] = %d\n",
1155 atomic_read(&priv->wmm_tx_pending[3]));
1156 p += sprintf(p, "media_state=\"%s\"\n", !priv->media_connected ?
1157 "Disconnected" : "Connected");
1158 p += sprintf(p, "carrier %s\n", (netif_carrier_ok(priv->netdev)
1159 ? "on" : "off"));
1160 for (idx = 0; idx < priv->netdev->num_tx_queues; idx++) {
1161 txq = netdev_get_tx_queue(priv->netdev, idx);
1162 p += sprintf(p, "tx queue %d:%s ", idx,
1163 netif_tx_queue_stopped(txq) ?
1164 "stopped" : "started");
1165 }
1166 p += sprintf(p, "\n%s: num_tx_timeout = %d\n",
1167 priv->netdev->name, priv->num_tx_timeout);
1168 }
1169
1170 if (adapter->iface_type == MWIFIEX_SDIO ||
1171 adapter->iface_type == MWIFIEX_PCIE) {
1172 p += sprintf(p, "\n=== %s register dump===\n",
1173 adapter->iface_type == MWIFIEX_SDIO ?
1174 "SDIO" : "PCIE");
1175 if (adapter->if_ops.reg_dump)
1176 p += adapter->if_ops.reg_dump(adapter, p);
1177 }
1178 p += sprintf(p, "\n=== more debug information\n");
1179 debug_info = kzalloc(sizeof(*debug_info), GFP_KERNEL);
1180 if (debug_info) {
1181 for (i = 0; i < adapter->priv_num; i++) {
1182 if (!adapter->priv[i] || !adapter->priv[i]->netdev)
1183 continue;
1184 priv = adapter->priv[i];
1185 mwifiex_get_debug_info(priv, debug_info);
1186 p += mwifiex_debug_info_to_buffer(priv, p, debug_info);
1187 break;
1188 }
1189 kfree(debug_info);
1190 }
1191
1192 strcpy(p, "\n========End dump========\n");
1193 p += strlen("\n========End dump========\n");
1194 mwifiex_dbg(adapter, MSG, "===mwifiex driverinfo dump end===\n");
1195 adapter->devdump_len = p - (char *)adapter->devdump_data;
1196 }
1197 EXPORT_SYMBOL_GPL(mwifiex_drv_info_dump);
1198
mwifiex_prepare_fw_dump_info(struct mwifiex_adapter * adapter)1199 void mwifiex_prepare_fw_dump_info(struct mwifiex_adapter *adapter)
1200 {
1201 u8 idx;
1202 char *fw_dump_ptr;
1203 u32 dump_len = 0;
1204
1205 for (idx = 0; idx < adapter->num_mem_types; idx++) {
1206 struct memory_type_mapping *entry =
1207 &adapter->mem_type_mapping_tbl[idx];
1208
1209 if (entry->mem_ptr) {
1210 dump_len += (strlen("========Start dump ") +
1211 strlen(entry->mem_name) +
1212 strlen("========\n") +
1213 (entry->mem_size + 1) +
1214 strlen("\n========End dump========\n"));
1215 }
1216 }
1217
1218 if (dump_len + 1 + adapter->devdump_len > MWIFIEX_FW_DUMP_SIZE) {
1219 /* Realloc in case buffer overflow */
1220 fw_dump_ptr = vzalloc(dump_len + 1 + adapter->devdump_len);
1221 mwifiex_dbg(adapter, MSG, "Realloc device dump data.\n");
1222 if (!fw_dump_ptr) {
1223 vfree(adapter->devdump_data);
1224 mwifiex_dbg(adapter, ERROR,
1225 "vzalloc devdump data failure!\n");
1226 return;
1227 }
1228
1229 memmove(fw_dump_ptr, adapter->devdump_data,
1230 adapter->devdump_len);
1231 vfree(adapter->devdump_data);
1232 adapter->devdump_data = fw_dump_ptr;
1233 }
1234
1235 fw_dump_ptr = (char *)adapter->devdump_data + adapter->devdump_len;
1236
1237 for (idx = 0; idx < adapter->num_mem_types; idx++) {
1238 struct memory_type_mapping *entry =
1239 &adapter->mem_type_mapping_tbl[idx];
1240
1241 if (entry->mem_ptr) {
1242 strcpy(fw_dump_ptr, "========Start dump ");
1243 fw_dump_ptr += strlen("========Start dump ");
1244
1245 strcpy(fw_dump_ptr, entry->mem_name);
1246 fw_dump_ptr += strlen(entry->mem_name);
1247
1248 strcpy(fw_dump_ptr, "========\n");
1249 fw_dump_ptr += strlen("========\n");
1250
1251 memcpy(fw_dump_ptr, entry->mem_ptr, entry->mem_size);
1252 fw_dump_ptr += entry->mem_size;
1253
1254 strcpy(fw_dump_ptr, "\n========End dump========\n");
1255 fw_dump_ptr += strlen("\n========End dump========\n");
1256 }
1257 }
1258
1259 adapter->devdump_len = fw_dump_ptr - (char *)adapter->devdump_data;
1260
1261 for (idx = 0; idx < adapter->num_mem_types; idx++) {
1262 struct memory_type_mapping *entry =
1263 &adapter->mem_type_mapping_tbl[idx];
1264
1265 vfree(entry->mem_ptr);
1266 entry->mem_ptr = NULL;
1267 entry->mem_size = 0;
1268 }
1269 }
1270 EXPORT_SYMBOL_GPL(mwifiex_prepare_fw_dump_info);
1271
1272 /*
1273 * CFG802.11 network device handler for statistics retrieval.
1274 */
mwifiex_get_stats(struct net_device * dev)1275 static struct net_device_stats *mwifiex_get_stats(struct net_device *dev)
1276 {
1277 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
1278
1279 return &priv->stats;
1280 }
1281
1282 static u16
mwifiex_netdev_select_wmm_queue(struct net_device * dev,struct sk_buff * skb,struct net_device * sb_dev)1283 mwifiex_netdev_select_wmm_queue(struct net_device *dev, struct sk_buff *skb,
1284 struct net_device *sb_dev)
1285 {
1286 skb->priority = cfg80211_classify8021d(skb, NULL);
1287 return mwifiex_1d_to_wmm_queue[skb->priority];
1288 }
1289
1290 /* Network device handlers */
1291 static const struct net_device_ops mwifiex_netdev_ops = {
1292 .ndo_open = mwifiex_open,
1293 .ndo_stop = mwifiex_close,
1294 .ndo_start_xmit = mwifiex_hard_start_xmit,
1295 .ndo_set_mac_address = mwifiex_ndo_set_mac_address,
1296 .ndo_validate_addr = eth_validate_addr,
1297 .ndo_tx_timeout = mwifiex_tx_timeout,
1298 .ndo_get_stats = mwifiex_get_stats,
1299 .ndo_set_rx_mode = mwifiex_set_multicast_list,
1300 .ndo_select_queue = mwifiex_netdev_select_wmm_queue,
1301 };
1302
1303 /*
1304 * This function initializes the private structure parameters.
1305 *
1306 * The following wait queues are initialized -
1307 * - IOCTL wait queue
1308 * - Command wait queue
1309 * - Statistics wait queue
1310 *
1311 * ...and the following default parameters are set -
1312 * - Current key index : Set to 0
1313 * - Rate index : Set to auto
1314 * - Media connected : Set to disconnected
1315 * - Adhoc link sensed : Set to false
1316 * - Nick name : Set to null
1317 * - Number of Tx timeout : Set to 0
1318 * - Device address : Set to current address
1319 * - Rx histogram statistc : Set to 0
1320 *
1321 * In addition, the CFG80211 work queue is also created.
1322 */
mwifiex_init_priv_params(struct mwifiex_private * priv,struct net_device * dev)1323 void mwifiex_init_priv_params(struct mwifiex_private *priv,
1324 struct net_device *dev)
1325 {
1326 dev->netdev_ops = &mwifiex_netdev_ops;
1327 dev->needs_free_netdev = true;
1328 /* Initialize private structure */
1329 priv->current_key_index = 0;
1330 priv->media_connected = false;
1331 memset(priv->mgmt_ie, 0,
1332 sizeof(struct mwifiex_ie) * MAX_MGMT_IE_INDEX);
1333 priv->beacon_idx = MWIFIEX_AUTO_IDX_MASK;
1334 priv->proberesp_idx = MWIFIEX_AUTO_IDX_MASK;
1335 priv->assocresp_idx = MWIFIEX_AUTO_IDX_MASK;
1336 priv->gen_idx = MWIFIEX_AUTO_IDX_MASK;
1337 priv->num_tx_timeout = 0;
1338 if (is_valid_ether_addr(dev->dev_addr))
1339 ether_addr_copy(priv->curr_addr, dev->dev_addr);
1340 else
1341 ether_addr_copy(priv->curr_addr, priv->adapter->perm_addr);
1342
1343 if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA ||
1344 GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_UAP) {
1345 priv->hist_data = kmalloc(sizeof(*priv->hist_data), GFP_KERNEL);
1346 if (priv->hist_data)
1347 mwifiex_hist_data_reset(priv);
1348 }
1349 }
1350
1351 /*
1352 * This function check if command is pending.
1353 */
is_command_pending(struct mwifiex_adapter * adapter)1354 int is_command_pending(struct mwifiex_adapter *adapter)
1355 {
1356 int is_cmd_pend_q_empty;
1357
1358 spin_lock_bh(&adapter->cmd_pending_q_lock);
1359 is_cmd_pend_q_empty = list_empty(&adapter->cmd_pending_q);
1360 spin_unlock_bh(&adapter->cmd_pending_q_lock);
1361
1362 return !is_cmd_pend_q_empty;
1363 }
1364
1365 /*
1366 * This is the RX work queue function.
1367 *
1368 * It handles the RX operations.
1369 */
mwifiex_rx_work_queue(struct work_struct * work)1370 static void mwifiex_rx_work_queue(struct work_struct *work)
1371 {
1372 struct mwifiex_adapter *adapter =
1373 container_of(work, struct mwifiex_adapter, rx_work);
1374
1375 if (test_bit(MWIFIEX_SURPRISE_REMOVED, &adapter->work_flags))
1376 return;
1377 mwifiex_process_rx(adapter);
1378 }
1379
1380 /*
1381 * This is the main work queue function.
1382 *
1383 * It handles the main process, which in turn handles the complete
1384 * driver operations.
1385 */
mwifiex_main_work_queue(struct work_struct * work)1386 static void mwifiex_main_work_queue(struct work_struct *work)
1387 {
1388 struct mwifiex_adapter *adapter =
1389 container_of(work, struct mwifiex_adapter, main_work);
1390
1391 if (test_bit(MWIFIEX_SURPRISE_REMOVED, &adapter->work_flags))
1392 return;
1393 mwifiex_main_process(adapter);
1394 }
1395
1396 /* Common teardown code used for both device removal and reset */
mwifiex_uninit_sw(struct mwifiex_adapter * adapter)1397 static void mwifiex_uninit_sw(struct mwifiex_adapter *adapter)
1398 {
1399 struct mwifiex_private *priv;
1400 int i;
1401
1402 /* We can no longer handle interrupts once we start doing the teardown
1403 * below.
1404 */
1405 if (adapter->if_ops.disable_int)
1406 adapter->if_ops.disable_int(adapter);
1407
1408 set_bit(MWIFIEX_SURPRISE_REMOVED, &adapter->work_flags);
1409 mwifiex_terminate_workqueue(adapter);
1410 adapter->int_status = 0;
1411
1412 /* Stop data */
1413 for (i = 0; i < adapter->priv_num; i++) {
1414 priv = adapter->priv[i];
1415 if (priv && priv->netdev) {
1416 mwifiex_stop_net_dev_queue(priv->netdev, adapter);
1417 if (netif_carrier_ok(priv->netdev))
1418 netif_carrier_off(priv->netdev);
1419 netif_device_detach(priv->netdev);
1420 }
1421 }
1422
1423 mwifiex_dbg(adapter, CMD, "cmd: calling mwifiex_shutdown_drv...\n");
1424 mwifiex_shutdown_drv(adapter);
1425 mwifiex_dbg(adapter, CMD, "cmd: mwifiex_shutdown_drv done\n");
1426
1427 if (atomic_read(&adapter->rx_pending) ||
1428 atomic_read(&adapter->tx_pending) ||
1429 atomic_read(&adapter->cmd_pending)) {
1430 mwifiex_dbg(adapter, ERROR,
1431 "rx_pending=%d, tx_pending=%d,\t"
1432 "cmd_pending=%d\n",
1433 atomic_read(&adapter->rx_pending),
1434 atomic_read(&adapter->tx_pending),
1435 atomic_read(&adapter->cmd_pending));
1436 }
1437
1438 for (i = 0; i < adapter->priv_num; i++) {
1439 priv = adapter->priv[i];
1440 if (!priv)
1441 continue;
1442 rtnl_lock();
1443 if (priv->netdev &&
1444 priv->wdev.iftype != NL80211_IFTYPE_UNSPECIFIED)
1445 mwifiex_del_virtual_intf(adapter->wiphy, &priv->wdev);
1446 rtnl_unlock();
1447 }
1448
1449 wiphy_unregister(adapter->wiphy);
1450 wiphy_free(adapter->wiphy);
1451 adapter->wiphy = NULL;
1452
1453 vfree(adapter->chan_stats);
1454 mwifiex_free_cmd_buffers(adapter);
1455 }
1456
1457 /*
1458 * This function gets called during PCIe function level reset.
1459 */
mwifiex_shutdown_sw(struct mwifiex_adapter * adapter)1460 int mwifiex_shutdown_sw(struct mwifiex_adapter *adapter)
1461 {
1462 struct mwifiex_private *priv;
1463
1464 if (!adapter)
1465 return 0;
1466
1467 wait_for_completion(adapter->fw_done);
1468 /* Caller should ensure we aren't suspending while this happens */
1469 reinit_completion(adapter->fw_done);
1470
1471 priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
1472 mwifiex_deauthenticate(priv, NULL);
1473
1474 mwifiex_init_shutdown_fw(priv, MWIFIEX_FUNC_SHUTDOWN);
1475
1476 mwifiex_uninit_sw(adapter);
1477 adapter->is_up = false;
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 if (adapter->is_up)
1740 mwifiex_uninit_sw(adapter);
1741
1742 if (adapter->irq_wakeup >= 0)
1743 device_init_wakeup(adapter->dev, false);
1744
1745 /* Unregister device */
1746 mwifiex_dbg(adapter, INFO,
1747 "info: unregister device\n");
1748 if (adapter->if_ops.unregister_dev)
1749 adapter->if_ops.unregister_dev(adapter);
1750 /* Free adapter structure */
1751 mwifiex_dbg(adapter, INFO,
1752 "info: free adapter\n");
1753 mwifiex_free_adapter(adapter);
1754
1755 return 0;
1756 }
1757 EXPORT_SYMBOL_GPL(mwifiex_remove_card);
1758
_mwifiex_dbg(const struct mwifiex_adapter * adapter,int mask,const char * fmt,...)1759 void _mwifiex_dbg(const struct mwifiex_adapter *adapter, int mask,
1760 const char *fmt, ...)
1761 {
1762 struct va_format vaf;
1763 va_list args;
1764
1765 if (!(adapter->debug_mask & mask))
1766 return;
1767
1768 va_start(args, fmt);
1769
1770 vaf.fmt = fmt;
1771 vaf.va = &args;
1772
1773 if (adapter->dev)
1774 dev_info(adapter->dev, "%pV", &vaf);
1775 else
1776 pr_info("%pV", &vaf);
1777
1778 va_end(args);
1779 }
1780 EXPORT_SYMBOL_GPL(_mwifiex_dbg);
1781
1782 /*
1783 * This function initializes the module.
1784 *
1785 * The debug FS is also initialized if configured.
1786 */
1787 static int
mwifiex_init_module(void)1788 mwifiex_init_module(void)
1789 {
1790 #ifdef CONFIG_DEBUG_FS
1791 mwifiex_debugfs_init();
1792 #endif
1793 return 0;
1794 }
1795
1796 /*
1797 * This function cleans up the module.
1798 *
1799 * The debug FS is removed if available.
1800 */
1801 static void
mwifiex_cleanup_module(void)1802 mwifiex_cleanup_module(void)
1803 {
1804 #ifdef CONFIG_DEBUG_FS
1805 mwifiex_debugfs_remove();
1806 #endif
1807 }
1808
1809 module_init(mwifiex_init_module);
1810 module_exit(mwifiex_cleanup_module);
1811
1812 MODULE_AUTHOR("Marvell International Ltd.");
1813 MODULE_DESCRIPTION("Marvell WiFi-Ex Driver version " VERSION);
1814 MODULE_VERSION(VERSION);
1815 MODULE_LICENSE("GPL v2");
1816