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Merge remote-tracking branch 'sound-asoc/for-next'
[deliverable/linux.git] / drivers / net / wireless / marvell / mwifiex / main.c
1 /*
2 * Marvell Wireless LAN device driver: major functions
3 *
4 * Copyright (C) 2011-2014, Marvell International Ltd.
5 *
6 * This software file (the "File") is distributed by Marvell International
7 * Ltd. under the terms of the GNU General Public License Version 2, June 1991
8 * (the "License"). You may use, redistribute and/or modify this File in
9 * accordance with the terms and conditions of the License, a copy of which
10 * is available by writing to the Free Software Foundation, Inc.,
11 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
12 * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
13 *
14 * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
16 * ARE EXPRESSLY DISCLAIMED. The License provides additional details about
17 * this warranty disclaimer.
18 */
19
20 #include "main.h"
21 #include "wmm.h"
22 #include "cfg80211.h"
23 #include "11n.h"
24
25 #define VERSION "1.0"
26 #define MFG_FIRMWARE "mwifiex_mfg.bin"
27
28 static unsigned int debug_mask = MWIFIEX_DEFAULT_DEBUG_MASK;
29 module_param(debug_mask, uint, 0);
30 MODULE_PARM_DESC(debug_mask, "bitmap for debug flags");
31
32 const char driver_version[] = "mwifiex " VERSION " (%s) ";
33 static char *cal_data_cfg;
34 module_param(cal_data_cfg, charp, 0);
35
36 static unsigned short driver_mode;
37 module_param(driver_mode, ushort, 0);
38 MODULE_PARM_DESC(driver_mode,
39 "station=0x1(default), ap-sta=0x3, station-p2p=0x5, ap-sta-p2p=0x7");
40
41 bool mfg_mode;
42 module_param(mfg_mode, bool, 0);
43 MODULE_PARM_DESC(mfg_mode, "manufacturing mode enable:1, disable:0");
44
45 /*
46 * This function registers the device and performs all the necessary
47 * initializations.
48 *
49 * The following initialization operations are performed -
50 * - Allocate adapter structure
51 * - Save interface specific operations table in adapter
52 * - Call interface specific initialization routine
53 * - Allocate private structures
54 * - Set default adapter structure parameters
55 * - Initialize locks
56 *
57 * In case of any errors during inittialization, this function also ensures
58 * proper cleanup before exiting.
59 */
60 static int mwifiex_register(void *card, struct mwifiex_if_ops *if_ops,
61 void **padapter)
62 {
63 struct mwifiex_adapter *adapter;
64 int i;
65
66 adapter = kzalloc(sizeof(struct mwifiex_adapter), GFP_KERNEL);
67 if (!adapter)
68 return -ENOMEM;
69
70 *padapter = adapter;
71 adapter->card = card;
72
73 /* Save interface specific operations in adapter */
74 memmove(&adapter->if_ops, if_ops, sizeof(struct mwifiex_if_ops));
75 adapter->debug_mask = debug_mask;
76
77 /* card specific initialization has been deferred until now .. */
78 if (adapter->if_ops.init_if)
79 if (adapter->if_ops.init_if(adapter))
80 goto error;
81
82 adapter->priv_num = 0;
83
84 for (i = 0; i < MWIFIEX_MAX_BSS_NUM; i++) {
85 /* Allocate memory for private structure */
86 adapter->priv[i] =
87 kzalloc(sizeof(struct mwifiex_private), GFP_KERNEL);
88 if (!adapter->priv[i])
89 goto error;
90
91 adapter->priv[i]->adapter = adapter;
92 adapter->priv_num++;
93 }
94 mwifiex_init_lock_list(adapter);
95
96 setup_timer(&adapter->cmd_timer, mwifiex_cmd_timeout_func,
97 (unsigned long)adapter);
98
99 return 0;
100
101 error:
102 mwifiex_dbg(adapter, ERROR,
103 "info: leave mwifiex_register with error\n");
104
105 for (i = 0; i < adapter->priv_num; i++)
106 kfree(adapter->priv[i]);
107
108 kfree(adapter);
109
110 return -1;
111 }
112
113 /*
114 * This function unregisters the device and performs all the necessary
115 * cleanups.
116 *
117 * The following cleanup operations are performed -
118 * - Free the timers
119 * - Free beacon buffers
120 * - Free private structures
121 * - Free adapter structure
122 */
123 static int mwifiex_unregister(struct mwifiex_adapter *adapter)
124 {
125 s32 i;
126
127 if (adapter->if_ops.cleanup_if)
128 adapter->if_ops.cleanup_if(adapter);
129
130 del_timer_sync(&adapter->cmd_timer);
131
132 /* Free private structures */
133 for (i = 0; i < adapter->priv_num; i++) {
134 if (adapter->priv[i]) {
135 mwifiex_free_curr_bcn(adapter->priv[i]);
136 kfree(adapter->priv[i]);
137 }
138 }
139
140 if (adapter->nd_info) {
141 for (i = 0 ; i < adapter->nd_info->n_matches ; i++)
142 kfree(adapter->nd_info->matches[i]);
143 kfree(adapter->nd_info);
144 adapter->nd_info = NULL;
145 }
146
147 kfree(adapter->regd);
148
149 vfree(adapter->chan_stats);
150 kfree(adapter);
151 return 0;
152 }
153
154 void mwifiex_queue_main_work(struct mwifiex_adapter *adapter)
155 {
156 unsigned long flags;
157
158 spin_lock_irqsave(&adapter->main_proc_lock, flags);
159 if (adapter->mwifiex_processing) {
160 adapter->more_task_flag = true;
161 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
162 } else {
163 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
164 queue_work(adapter->workqueue, &adapter->main_work);
165 }
166 }
167 EXPORT_SYMBOL_GPL(mwifiex_queue_main_work);
168
169 static void mwifiex_queue_rx_work(struct mwifiex_adapter *adapter)
170 {
171 unsigned long flags;
172
173 spin_lock_irqsave(&adapter->rx_proc_lock, flags);
174 if (adapter->rx_processing) {
175 spin_unlock_irqrestore(&adapter->rx_proc_lock, flags);
176 } else {
177 spin_unlock_irqrestore(&adapter->rx_proc_lock, flags);
178 queue_work(adapter->rx_workqueue, &adapter->rx_work);
179 }
180 }
181
182 static int mwifiex_process_rx(struct mwifiex_adapter *adapter)
183 {
184 unsigned long flags;
185 struct sk_buff *skb;
186 struct mwifiex_rxinfo *rx_info;
187
188 spin_lock_irqsave(&adapter->rx_proc_lock, flags);
189 if (adapter->rx_processing || adapter->rx_locked) {
190 spin_unlock_irqrestore(&adapter->rx_proc_lock, flags);
191 goto exit_rx_proc;
192 } else {
193 adapter->rx_processing = true;
194 spin_unlock_irqrestore(&adapter->rx_proc_lock, flags);
195 }
196
197 /* Check for Rx data */
198 while ((skb = skb_dequeue(&adapter->rx_data_q))) {
199 atomic_dec(&adapter->rx_pending);
200 if ((adapter->delay_main_work ||
201 adapter->iface_type == MWIFIEX_USB) &&
202 (atomic_read(&adapter->rx_pending) < LOW_RX_PENDING)) {
203 if (adapter->if_ops.submit_rem_rx_urbs)
204 adapter->if_ops.submit_rem_rx_urbs(adapter);
205 adapter->delay_main_work = false;
206 mwifiex_queue_main_work(adapter);
207 }
208 rx_info = MWIFIEX_SKB_RXCB(skb);
209 if (rx_info->buf_type == MWIFIEX_TYPE_AGGR_DATA) {
210 if (adapter->if_ops.deaggr_pkt)
211 adapter->if_ops.deaggr_pkt(adapter, skb);
212 dev_kfree_skb_any(skb);
213 } else {
214 mwifiex_handle_rx_packet(adapter, skb);
215 }
216 }
217 spin_lock_irqsave(&adapter->rx_proc_lock, flags);
218 adapter->rx_processing = false;
219 spin_unlock_irqrestore(&adapter->rx_proc_lock, flags);
220
221 exit_rx_proc:
222 return 0;
223 }
224
225 /*
226 * The main process.
227 *
228 * This function is the main procedure of the driver and handles various driver
229 * operations. It runs in a loop and provides the core functionalities.
230 *
231 * The main responsibilities of this function are -
232 * - Ensure concurrency control
233 * - Handle pending interrupts and call interrupt handlers
234 * - Wake up the card if required
235 * - Handle command responses and call response handlers
236 * - Handle events and call event handlers
237 * - Execute pending commands
238 * - Transmit pending data packets
239 */
240 int mwifiex_main_process(struct mwifiex_adapter *adapter)
241 {
242 int ret = 0;
243 unsigned long flags;
244
245 spin_lock_irqsave(&adapter->main_proc_lock, flags);
246
247 /* Check if already processing */
248 if (adapter->mwifiex_processing || adapter->main_locked) {
249 adapter->more_task_flag = true;
250 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
251 goto exit_main_proc;
252 } else {
253 adapter->mwifiex_processing = true;
254 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
255 }
256 process_start:
257 do {
258 if ((adapter->hw_status == MWIFIEX_HW_STATUS_CLOSING) ||
259 (adapter->hw_status == MWIFIEX_HW_STATUS_NOT_READY))
260 break;
261
262 /* For non-USB interfaces, If we process interrupts first, it
263 * would increase RX pending even further. Avoid this by
264 * checking if rx_pending has crossed high threshold and
265 * schedule rx work queue and then process interrupts.
266 * For USB interface, there are no interrupts. We already have
267 * HIGH_RX_PENDING check in usb.c
268 */
269 if (atomic_read(&adapter->rx_pending) >= HIGH_RX_PENDING &&
270 adapter->iface_type != MWIFIEX_USB) {
271 adapter->delay_main_work = true;
272 mwifiex_queue_rx_work(adapter);
273 break;
274 }
275
276 /* Handle pending interrupt if any */
277 if (adapter->int_status) {
278 if (adapter->hs_activated)
279 mwifiex_process_hs_config(adapter);
280 if (adapter->if_ops.process_int_status)
281 adapter->if_ops.process_int_status(adapter);
282 }
283
284 if (adapter->rx_work_enabled && adapter->data_received)
285 mwifiex_queue_rx_work(adapter);
286
287 /* Need to wake up the card ? */
288 if ((adapter->ps_state == PS_STATE_SLEEP) &&
289 (adapter->pm_wakeup_card_req &&
290 !adapter->pm_wakeup_fw_try) &&
291 (is_command_pending(adapter) ||
292 !skb_queue_empty(&adapter->tx_data_q) ||
293 !mwifiex_bypass_txlist_empty(adapter) ||
294 !mwifiex_wmm_lists_empty(adapter))) {
295 adapter->pm_wakeup_fw_try = true;
296 mod_timer(&adapter->wakeup_timer, jiffies + (HZ*3));
297 adapter->if_ops.wakeup(adapter);
298 continue;
299 }
300
301 if (IS_CARD_RX_RCVD(adapter)) {
302 adapter->data_received = false;
303 adapter->pm_wakeup_fw_try = false;
304 del_timer(&adapter->wakeup_timer);
305 if (adapter->ps_state == PS_STATE_SLEEP)
306 adapter->ps_state = PS_STATE_AWAKE;
307 } else {
308 /* We have tried to wakeup the card already */
309 if (adapter->pm_wakeup_fw_try)
310 break;
311 if (adapter->ps_state != PS_STATE_AWAKE)
312 break;
313 if (adapter->tx_lock_flag) {
314 if (adapter->iface_type == MWIFIEX_USB) {
315 if (!adapter->usb_mc_setup)
316 break;
317 } else
318 break;
319 }
320
321 if ((!adapter->scan_chan_gap_enabled &&
322 adapter->scan_processing) || adapter->data_sent ||
323 mwifiex_is_tdls_chan_switching
324 (mwifiex_get_priv(adapter,
325 MWIFIEX_BSS_ROLE_STA)) ||
326 (mwifiex_wmm_lists_empty(adapter) &&
327 mwifiex_bypass_txlist_empty(adapter) &&
328 skb_queue_empty(&adapter->tx_data_q))) {
329 if (adapter->cmd_sent || adapter->curr_cmd ||
330 !mwifiex_is_send_cmd_allowed
331 (mwifiex_get_priv(adapter,
332 MWIFIEX_BSS_ROLE_STA)) ||
333 (!is_command_pending(adapter)))
334 break;
335 }
336 }
337
338 /* Check for event */
339 if (adapter->event_received) {
340 adapter->event_received = false;
341 mwifiex_process_event(adapter);
342 }
343
344 /* Check for Cmd Resp */
345 if (adapter->cmd_resp_received) {
346 adapter->cmd_resp_received = false;
347 mwifiex_process_cmdresp(adapter);
348
349 /* call mwifiex back when init_fw is done */
350 if (adapter->hw_status == MWIFIEX_HW_STATUS_INIT_DONE) {
351 adapter->hw_status = MWIFIEX_HW_STATUS_READY;
352 mwifiex_init_fw_complete(adapter);
353 }
354 }
355
356 /* Check if we need to confirm Sleep Request
357 received previously */
358 if (adapter->ps_state == PS_STATE_PRE_SLEEP) {
359 if (!adapter->cmd_sent && !adapter->curr_cmd)
360 mwifiex_check_ps_cond(adapter);
361 }
362
363 /* * The ps_state may have been changed during processing of
364 * Sleep Request event.
365 */
366 if ((adapter->ps_state == PS_STATE_SLEEP) ||
367 (adapter->ps_state == PS_STATE_PRE_SLEEP) ||
368 (adapter->ps_state == PS_STATE_SLEEP_CFM)) {
369 continue;
370 }
371
372 if (adapter->tx_lock_flag) {
373 if (adapter->iface_type == MWIFIEX_USB) {
374 if (!adapter->usb_mc_setup)
375 continue;
376 } else
377 continue;
378 }
379
380 if (!adapter->cmd_sent && !adapter->curr_cmd &&
381 mwifiex_is_send_cmd_allowed
382 (mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA))) {
383 if (mwifiex_exec_next_cmd(adapter) == -1) {
384 ret = -1;
385 break;
386 }
387 }
388
389 /** If USB Multi channel setup ongoing,
390 * wait for ready to tx data.
391 */
392 if (adapter->iface_type == MWIFIEX_USB &&
393 adapter->usb_mc_setup)
394 continue;
395
396 if ((adapter->scan_chan_gap_enabled ||
397 !adapter->scan_processing) &&
398 !adapter->data_sent &&
399 !skb_queue_empty(&adapter->tx_data_q)) {
400 mwifiex_process_tx_queue(adapter);
401 if (adapter->hs_activated) {
402 adapter->is_hs_configured = false;
403 mwifiex_hs_activated_event
404 (mwifiex_get_priv
405 (adapter, MWIFIEX_BSS_ROLE_ANY),
406 false);
407 }
408 }
409
410 if ((adapter->scan_chan_gap_enabled ||
411 !adapter->scan_processing) &&
412 !adapter->data_sent &&
413 !mwifiex_bypass_txlist_empty(adapter) &&
414 !mwifiex_is_tdls_chan_switching
415 (mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA))) {
416 mwifiex_process_bypass_tx(adapter);
417 if (adapter->hs_activated) {
418 adapter->is_hs_configured = false;
419 mwifiex_hs_activated_event
420 (mwifiex_get_priv
421 (adapter, MWIFIEX_BSS_ROLE_ANY),
422 false);
423 }
424 }
425
426 if ((adapter->scan_chan_gap_enabled ||
427 !adapter->scan_processing) &&
428 !adapter->data_sent && !mwifiex_wmm_lists_empty(adapter) &&
429 !mwifiex_is_tdls_chan_switching
430 (mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA))) {
431 mwifiex_wmm_process_tx(adapter);
432 if (adapter->hs_activated) {
433 adapter->is_hs_configured = false;
434 mwifiex_hs_activated_event
435 (mwifiex_get_priv
436 (adapter, MWIFIEX_BSS_ROLE_ANY),
437 false);
438 }
439 }
440
441 if (adapter->delay_null_pkt && !adapter->cmd_sent &&
442 !adapter->curr_cmd && !is_command_pending(adapter) &&
443 (mwifiex_wmm_lists_empty(adapter) &&
444 mwifiex_bypass_txlist_empty(adapter) &&
445 skb_queue_empty(&adapter->tx_data_q))) {
446 if (!mwifiex_send_null_packet
447 (mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA),
448 MWIFIEX_TxPD_POWER_MGMT_NULL_PACKET |
449 MWIFIEX_TxPD_POWER_MGMT_LAST_PACKET)) {
450 adapter->delay_null_pkt = false;
451 adapter->ps_state = PS_STATE_SLEEP;
452 }
453 break;
454 }
455 } while (true);
456
457 spin_lock_irqsave(&adapter->main_proc_lock, flags);
458 if (adapter->more_task_flag) {
459 adapter->more_task_flag = false;
460 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
461 goto process_start;
462 }
463 adapter->mwifiex_processing = false;
464 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
465
466 exit_main_proc:
467 if (adapter->hw_status == MWIFIEX_HW_STATUS_CLOSING)
468 mwifiex_shutdown_drv(adapter);
469 return ret;
470 }
471 EXPORT_SYMBOL_GPL(mwifiex_main_process);
472
473 /*
474 * This function frees the adapter structure.
475 *
476 * Additionally, this closes the netlink socket, frees the timers
477 * and private structures.
478 */
479 static void mwifiex_free_adapter(struct mwifiex_adapter *adapter)
480 {
481 if (!adapter) {
482 pr_err("%s: adapter is NULL\n", __func__);
483 return;
484 }
485
486 mwifiex_unregister(adapter);
487 pr_debug("info: %s: free adapter\n", __func__);
488 }
489
490 /*
491 * This function cancels all works in the queue and destroys
492 * the main workqueue.
493 */
494 static void mwifiex_terminate_workqueue(struct mwifiex_adapter *adapter)
495 {
496 if (adapter->workqueue) {
497 flush_workqueue(adapter->workqueue);
498 destroy_workqueue(adapter->workqueue);
499 adapter->workqueue = NULL;
500 }
501
502 if (adapter->rx_workqueue) {
503 flush_workqueue(adapter->rx_workqueue);
504 destroy_workqueue(adapter->rx_workqueue);
505 adapter->rx_workqueue = NULL;
506 }
507 }
508
509 /*
510 * This function gets firmware and initializes it.
511 *
512 * The main initialization steps followed are -
513 * - Download the correct firmware to card
514 * - Issue the init commands to firmware
515 */
516 static void mwifiex_fw_dpc(const struct firmware *firmware, void *context)
517 {
518 int ret;
519 char fmt[64];
520 struct mwifiex_private *priv;
521 struct mwifiex_adapter *adapter = context;
522 struct mwifiex_fw_image fw;
523 struct semaphore *sem = adapter->card_sem;
524 bool init_failed = false;
525 struct wireless_dev *wdev;
526
527 if (!firmware) {
528 mwifiex_dbg(adapter, ERROR,
529 "Failed to get firmware %s\n", adapter->fw_name);
530 goto err_dnld_fw;
531 }
532
533 memset(&fw, 0, sizeof(struct mwifiex_fw_image));
534 adapter->firmware = firmware;
535 fw.fw_buf = (u8 *) adapter->firmware->data;
536 fw.fw_len = adapter->firmware->size;
537
538 if (adapter->if_ops.dnld_fw) {
539 ret = adapter->if_ops.dnld_fw(adapter, &fw);
540 } else {
541 ret = mwifiex_dnld_fw(adapter, &fw);
542 }
543
544 if (ret == -1)
545 goto err_dnld_fw;
546
547 mwifiex_dbg(adapter, MSG, "WLAN FW is active\n");
548
549 if (cal_data_cfg) {
550 if ((request_firmware(&adapter->cal_data, cal_data_cfg,
551 adapter->dev)) < 0)
552 mwifiex_dbg(adapter, ERROR,
553 "Cal data request_firmware() failed\n");
554 }
555
556 /* enable host interrupt after fw dnld is successful */
557 if (adapter->if_ops.enable_int) {
558 if (adapter->if_ops.enable_int(adapter))
559 goto err_dnld_fw;
560 }
561
562 adapter->init_wait_q_woken = false;
563 ret = mwifiex_init_fw(adapter);
564 if (ret == -1) {
565 goto err_init_fw;
566 } else if (!ret) {
567 adapter->hw_status = MWIFIEX_HW_STATUS_READY;
568 goto done;
569 }
570 /* Wait for mwifiex_init to complete */
571 if (!adapter->mfg_mode) {
572 wait_event_interruptible(adapter->init_wait_q,
573 adapter->init_wait_q_woken);
574 if (adapter->hw_status != MWIFIEX_HW_STATUS_READY)
575 goto err_init_fw;
576 }
577
578 priv = adapter->priv[MWIFIEX_BSS_ROLE_STA];
579
580 if (!adapter->wiphy) {
581 if (mwifiex_register_cfg80211(adapter)) {
582 mwifiex_dbg(adapter, ERROR,
583 "cannot register with cfg80211\n");
584 goto err_init_fw;
585 }
586 }
587
588 if (mwifiex_init_channel_scan_gap(adapter)) {
589 mwifiex_dbg(adapter, ERROR,
590 "could not init channel stats table\n");
591 goto err_init_fw;
592 }
593
594 if (driver_mode) {
595 driver_mode &= MWIFIEX_DRIVER_MODE_BITMASK;
596 driver_mode |= MWIFIEX_DRIVER_MODE_STA;
597 }
598
599 rtnl_lock();
600 /* Create station interface by default */
601 wdev = mwifiex_add_virtual_intf(adapter->wiphy, "mlan%d", NET_NAME_ENUM,
602 NL80211_IFTYPE_STATION, NULL, NULL);
603 if (IS_ERR(wdev)) {
604 mwifiex_dbg(adapter, ERROR,
605 "cannot create default STA interface\n");
606 rtnl_unlock();
607 goto err_add_intf;
608 }
609
610 if (driver_mode & MWIFIEX_DRIVER_MODE_UAP) {
611 wdev = mwifiex_add_virtual_intf(adapter->wiphy, "uap%d", NET_NAME_ENUM,
612 NL80211_IFTYPE_AP, NULL, NULL);
613 if (IS_ERR(wdev)) {
614 mwifiex_dbg(adapter, ERROR,
615 "cannot create AP interface\n");
616 rtnl_unlock();
617 goto err_add_intf;
618 }
619 }
620
621 if (driver_mode & MWIFIEX_DRIVER_MODE_P2P) {
622 wdev = mwifiex_add_virtual_intf(adapter->wiphy, "p2p%d", NET_NAME_ENUM,
623 NL80211_IFTYPE_P2P_CLIENT, NULL,
624 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 goto done;
637
638 err_add_intf:
639 wiphy_unregister(adapter->wiphy);
640 wiphy_free(adapter->wiphy);
641 err_init_fw:
642 if (adapter->if_ops.disable_int)
643 adapter->if_ops.disable_int(adapter);
644 err_dnld_fw:
645 mwifiex_dbg(adapter, ERROR,
646 "info: %s: unregister device\n", __func__);
647 if (adapter->if_ops.unregister_dev)
648 adapter->if_ops.unregister_dev(adapter);
649
650 if (adapter->hw_status == MWIFIEX_HW_STATUS_READY) {
651 pr_debug("info: %s: shutdown mwifiex\n", __func__);
652 adapter->init_wait_q_woken = false;
653
654 if (mwifiex_shutdown_drv(adapter) == -EINPROGRESS)
655 wait_event_interruptible(adapter->init_wait_q,
656 adapter->init_wait_q_woken);
657 }
658 adapter->surprise_removed = true;
659 mwifiex_terminate_workqueue(adapter);
660 init_failed = true;
661 done:
662 if (adapter->cal_data) {
663 release_firmware(adapter->cal_data);
664 adapter->cal_data = NULL;
665 }
666 if (adapter->firmware) {
667 release_firmware(adapter->firmware);
668 adapter->firmware = NULL;
669 }
670 if (init_failed)
671 mwifiex_free_adapter(adapter);
672 up(sem);
673 return;
674 }
675
676 /*
677 * This function initializes the hardware and gets firmware.
678 */
679 static int mwifiex_init_hw_fw(struct mwifiex_adapter *adapter,
680 bool req_fw_nowait)
681 {
682 int ret;
683
684 /* Override default firmware with manufacturing one if
685 * manufacturing mode is enabled
686 */
687 if (mfg_mode) {
688 if (strlcpy(adapter->fw_name, MFG_FIRMWARE,
689 sizeof(adapter->fw_name)) >=
690 sizeof(adapter->fw_name)) {
691 pr_err("%s: fw_name too long!\n", __func__);
692 return -1;
693 }
694 }
695
696 if (req_fw_nowait) {
697 ret = request_firmware_nowait(THIS_MODULE, 1, adapter->fw_name,
698 adapter->dev, GFP_KERNEL, adapter,
699 mwifiex_fw_dpc);
700 if (ret < 0)
701 mwifiex_dbg(adapter, ERROR,
702 "request_firmware_nowait error %d\n", ret);
703 } else {
704 ret = request_firmware(&adapter->firmware,
705 adapter->fw_name,
706 adapter->dev);
707 if (ret < 0)
708 mwifiex_dbg(adapter, ERROR,
709 "request_firmware error %d\n", ret);
710 else
711 mwifiex_fw_dpc(adapter->firmware, (void *)adapter);
712 }
713
714 return ret;
715 }
716
717 /*
718 * CFG802.11 network device handler for open.
719 *
720 * Starts the data queue.
721 */
722 static int
723 mwifiex_open(struct net_device *dev)
724 {
725 netif_carrier_off(dev);
726
727 return 0;
728 }
729
730 /*
731 * CFG802.11 network device handler for close.
732 */
733 static int
734 mwifiex_close(struct net_device *dev)
735 {
736 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
737
738 if (priv->scan_request) {
739 struct cfg80211_scan_info info = {
740 .aborted = true,
741 };
742
743 mwifiex_dbg(priv->adapter, INFO,
744 "aborting scan on ndo_stop\n");
745 cfg80211_scan_done(priv->scan_request, &info);
746 priv->scan_request = NULL;
747 priv->scan_aborting = true;
748 }
749
750 if (priv->sched_scanning) {
751 mwifiex_dbg(priv->adapter, INFO,
752 "aborting bgscan on ndo_stop\n");
753 mwifiex_stop_bg_scan(priv);
754 cfg80211_sched_scan_stopped(priv->wdev.wiphy);
755 }
756
757 return 0;
758 }
759
760 static bool
761 mwifiex_bypass_tx_queue(struct mwifiex_private *priv,
762 struct sk_buff *skb)
763 {
764 struct ethhdr *eth_hdr = (struct ethhdr *)skb->data;
765
766 if (ntohs(eth_hdr->h_proto) == ETH_P_PAE ||
767 mwifiex_is_skb_mgmt_frame(skb) ||
768 (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA &&
769 ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) &&
770 (ntohs(eth_hdr->h_proto) == ETH_P_TDLS))) {
771 mwifiex_dbg(priv->adapter, DATA,
772 "bypass txqueue; eth type %#x, mgmt %d\n",
773 ntohs(eth_hdr->h_proto),
774 mwifiex_is_skb_mgmt_frame(skb));
775 return true;
776 }
777
778 return false;
779 }
780 /*
781 * Add buffer into wmm tx queue and queue work to transmit it.
782 */
783 int mwifiex_queue_tx_pkt(struct mwifiex_private *priv, struct sk_buff *skb)
784 {
785 struct netdev_queue *txq;
786 int index = mwifiex_1d_to_wmm_queue[skb->priority];
787
788 if (atomic_inc_return(&priv->wmm_tx_pending[index]) >= MAX_TX_PENDING) {
789 txq = netdev_get_tx_queue(priv->netdev, index);
790 if (!netif_tx_queue_stopped(txq)) {
791 netif_tx_stop_queue(txq);
792 mwifiex_dbg(priv->adapter, DATA,
793 "stop queue: %d\n", index);
794 }
795 }
796
797 if (mwifiex_bypass_tx_queue(priv, skb)) {
798 atomic_inc(&priv->adapter->tx_pending);
799 atomic_inc(&priv->adapter->bypass_tx_pending);
800 mwifiex_wmm_add_buf_bypass_txqueue(priv, skb);
801 } else {
802 atomic_inc(&priv->adapter->tx_pending);
803 mwifiex_wmm_add_buf_txqueue(priv, skb);
804 }
805
806 mwifiex_queue_main_work(priv->adapter);
807
808 return 0;
809 }
810
811 struct sk_buff *
812 mwifiex_clone_skb_for_tx_status(struct mwifiex_private *priv,
813 struct sk_buff *skb, u8 flag, u64 *cookie)
814 {
815 struct sk_buff *orig_skb = skb;
816 struct mwifiex_txinfo *tx_info, *orig_tx_info;
817
818 skb = skb_clone(skb, GFP_ATOMIC);
819 if (skb) {
820 unsigned long flags;
821 int id;
822
823 spin_lock_irqsave(&priv->ack_status_lock, flags);
824 id = idr_alloc(&priv->ack_status_frames, orig_skb,
825 1, 0x10, GFP_ATOMIC);
826 spin_unlock_irqrestore(&priv->ack_status_lock, flags);
827
828 if (id >= 0) {
829 tx_info = MWIFIEX_SKB_TXCB(skb);
830 tx_info->ack_frame_id = id;
831 tx_info->flags |= flag;
832 orig_tx_info = MWIFIEX_SKB_TXCB(orig_skb);
833 orig_tx_info->ack_frame_id = id;
834 orig_tx_info->flags |= flag;
835
836 if (flag == MWIFIEX_BUF_FLAG_ACTION_TX_STATUS && cookie)
837 orig_tx_info->cookie = *cookie;
838
839 } else if (skb_shared(skb)) {
840 kfree_skb(orig_skb);
841 } else {
842 kfree_skb(skb);
843 skb = orig_skb;
844 }
845 } else {
846 /* couldn't clone -- lose tx status ... */
847 skb = orig_skb;
848 }
849
850 return skb;
851 }
852
853 /*
854 * CFG802.11 network device handler for data transmission.
855 */
856 static int
857 mwifiex_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
858 {
859 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
860 struct sk_buff *new_skb;
861 struct mwifiex_txinfo *tx_info;
862 bool multicast;
863
864 mwifiex_dbg(priv->adapter, DATA,
865 "data: %lu BSS(%d-%d): Data <= kernel\n",
866 jiffies, priv->bss_type, priv->bss_num);
867
868 if (priv->adapter->surprise_removed) {
869 kfree_skb(skb);
870 priv->stats.tx_dropped++;
871 return 0;
872 }
873 if (!skb->len || (skb->len > ETH_FRAME_LEN)) {
874 mwifiex_dbg(priv->adapter, ERROR,
875 "Tx: bad skb len %d\n", skb->len);
876 kfree_skb(skb);
877 priv->stats.tx_dropped++;
878 return 0;
879 }
880 if (skb_headroom(skb) < MWIFIEX_MIN_DATA_HEADER_LEN) {
881 mwifiex_dbg(priv->adapter, DATA,
882 "data: Tx: insufficient skb headroom %d\n",
883 skb_headroom(skb));
884 /* Insufficient skb headroom - allocate a new skb */
885 new_skb =
886 skb_realloc_headroom(skb, MWIFIEX_MIN_DATA_HEADER_LEN);
887 if (unlikely(!new_skb)) {
888 mwifiex_dbg(priv->adapter, ERROR,
889 "Tx: cannot alloca new_skb\n");
890 kfree_skb(skb);
891 priv->stats.tx_dropped++;
892 return 0;
893 }
894 kfree_skb(skb);
895 skb = new_skb;
896 mwifiex_dbg(priv->adapter, INFO,
897 "info: new skb headroomd %d\n",
898 skb_headroom(skb));
899 }
900
901 tx_info = MWIFIEX_SKB_TXCB(skb);
902 memset(tx_info, 0, sizeof(*tx_info));
903 tx_info->bss_num = priv->bss_num;
904 tx_info->bss_type = priv->bss_type;
905 tx_info->pkt_len = skb->len;
906
907 multicast = is_multicast_ether_addr(skb->data);
908
909 if (unlikely(!multicast && skb->sk &&
910 skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS &&
911 priv->adapter->fw_api_ver == MWIFIEX_FW_V15))
912 skb = mwifiex_clone_skb_for_tx_status(priv,
913 skb,
914 MWIFIEX_BUF_FLAG_EAPOL_TX_STATUS, NULL);
915
916 /* Record the current time the packet was queued; used to
917 * determine the amount of time the packet was queued in
918 * the driver before it was sent to the firmware.
919 * The delay is then sent along with the packet to the
920 * firmware for aggregate delay calculation for stats and
921 * MSDU lifetime expiry.
922 */
923 __net_timestamp(skb);
924
925 if (ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) &&
926 priv->bss_type == MWIFIEX_BSS_TYPE_STA &&
927 !ether_addr_equal_unaligned(priv->cfg_bssid, skb->data)) {
928 if (priv->adapter->auto_tdls && priv->check_tdls_tx)
929 mwifiex_tdls_check_tx(priv, skb);
930 }
931
932 mwifiex_queue_tx_pkt(priv, skb);
933
934 return 0;
935 }
936
937 /*
938 * CFG802.11 network device handler for setting MAC address.
939 */
940 static int
941 mwifiex_set_mac_address(struct net_device *dev, void *addr)
942 {
943 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
944 struct sockaddr *hw_addr = addr;
945 int ret;
946
947 memcpy(priv->curr_addr, hw_addr->sa_data, ETH_ALEN);
948
949 /* Send request to firmware */
950 ret = mwifiex_send_cmd(priv, HostCmd_CMD_802_11_MAC_ADDRESS,
951 HostCmd_ACT_GEN_SET, 0, NULL, true);
952
953 if (!ret)
954 memcpy(priv->netdev->dev_addr, priv->curr_addr, ETH_ALEN);
955 else
956 mwifiex_dbg(priv->adapter, ERROR,
957 "set mac address failed: ret=%d\n", ret);
958
959 memcpy(dev->dev_addr, priv->curr_addr, ETH_ALEN);
960
961 return ret;
962 }
963
964 /*
965 * CFG802.11 network device handler for setting multicast list.
966 */
967 static void mwifiex_set_multicast_list(struct net_device *dev)
968 {
969 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
970 struct mwifiex_multicast_list mcast_list;
971
972 if (dev->flags & IFF_PROMISC) {
973 mcast_list.mode = MWIFIEX_PROMISC_MODE;
974 } else if (dev->flags & IFF_ALLMULTI ||
975 netdev_mc_count(dev) > MWIFIEX_MAX_MULTICAST_LIST_SIZE) {
976 mcast_list.mode = MWIFIEX_ALL_MULTI_MODE;
977 } else {
978 mcast_list.mode = MWIFIEX_MULTICAST_MODE;
979 mcast_list.num_multicast_addr =
980 mwifiex_copy_mcast_addr(&mcast_list, dev);
981 }
982 mwifiex_request_set_multicast_list(priv, &mcast_list);
983 }
984
985 /*
986 * CFG802.11 network device handler for transmission timeout.
987 */
988 static void
989 mwifiex_tx_timeout(struct net_device *dev)
990 {
991 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
992
993 priv->num_tx_timeout++;
994 priv->tx_timeout_cnt++;
995 mwifiex_dbg(priv->adapter, ERROR,
996 "%lu : Tx timeout(#%d), bss_type-num = %d-%d\n",
997 jiffies, priv->tx_timeout_cnt, priv->bss_type,
998 priv->bss_num);
999 mwifiex_set_trans_start(dev);
1000
1001 if (priv->tx_timeout_cnt > TX_TIMEOUT_THRESHOLD &&
1002 priv->adapter->if_ops.card_reset) {
1003 mwifiex_dbg(priv->adapter, ERROR,
1004 "tx_timeout_cnt exceeds threshold.\t"
1005 "Triggering card reset!\n");
1006 priv->adapter->if_ops.card_reset(priv->adapter);
1007 }
1008 }
1009
1010 void mwifiex_multi_chan_resync(struct mwifiex_adapter *adapter)
1011 {
1012 struct usb_card_rec *card = adapter->card;
1013 struct mwifiex_private *priv;
1014 u16 tx_buf_size;
1015 int i, ret;
1016
1017 card->mc_resync_flag = true;
1018 for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++) {
1019 if (atomic_read(&card->port[i].tx_data_urb_pending)) {
1020 mwifiex_dbg(adapter, WARN, "pending data urb in sys\n");
1021 return;
1022 }
1023 }
1024
1025 card->mc_resync_flag = false;
1026 tx_buf_size = 0xffff;
1027 priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
1028 ret = mwifiex_send_cmd(priv, HostCmd_CMD_RECONFIGURE_TX_BUFF,
1029 HostCmd_ACT_GEN_SET, 0, &tx_buf_size, false);
1030 if (ret)
1031 mwifiex_dbg(adapter, ERROR,
1032 "send reconfig tx buf size cmd err\n");
1033 }
1034 EXPORT_SYMBOL_GPL(mwifiex_multi_chan_resync);
1035
1036 void mwifiex_drv_info_dump(struct mwifiex_adapter *adapter)
1037 {
1038 void *p;
1039 char drv_version[64];
1040 struct usb_card_rec *cardp;
1041 struct sdio_mmc_card *sdio_card;
1042 struct mwifiex_private *priv;
1043 int i, idx;
1044 struct netdev_queue *txq;
1045 struct mwifiex_debug_info *debug_info;
1046
1047 if (adapter->drv_info_dump) {
1048 vfree(adapter->drv_info_dump);
1049 adapter->drv_info_dump = NULL;
1050 adapter->drv_info_size = 0;
1051 }
1052
1053 mwifiex_dbg(adapter, MSG, "===mwifiex driverinfo dump start===\n");
1054
1055 adapter->drv_info_dump = vzalloc(MWIFIEX_DRV_INFO_SIZE_MAX);
1056
1057 if (!adapter->drv_info_dump)
1058 return;
1059
1060 p = (char *)(adapter->drv_info_dump);
1061 p += sprintf(p, "driver_name = " "\"mwifiex\"\n");
1062
1063 mwifiex_drv_get_driver_version(adapter, drv_version,
1064 sizeof(drv_version) - 1);
1065 p += sprintf(p, "driver_version = %s\n", drv_version);
1066
1067 if (adapter->iface_type == MWIFIEX_USB) {
1068 cardp = (struct usb_card_rec *)adapter->card;
1069 p += sprintf(p, "tx_cmd_urb_pending = %d\n",
1070 atomic_read(&cardp->tx_cmd_urb_pending));
1071 p += sprintf(p, "tx_data_urb_pending_port_0 = %d\n",
1072 atomic_read(&cardp->port[0].tx_data_urb_pending));
1073 p += sprintf(p, "tx_data_urb_pending_port_1 = %d\n",
1074 atomic_read(&cardp->port[1].tx_data_urb_pending));
1075 p += sprintf(p, "rx_cmd_urb_pending = %d\n",
1076 atomic_read(&cardp->rx_cmd_urb_pending));
1077 p += sprintf(p, "rx_data_urb_pending = %d\n",
1078 atomic_read(&cardp->rx_data_urb_pending));
1079 }
1080
1081 p += sprintf(p, "tx_pending = %d\n",
1082 atomic_read(&adapter->tx_pending));
1083 p += sprintf(p, "rx_pending = %d\n",
1084 atomic_read(&adapter->rx_pending));
1085
1086 if (adapter->iface_type == MWIFIEX_SDIO) {
1087 sdio_card = (struct sdio_mmc_card *)adapter->card;
1088 p += sprintf(p, "\nmp_rd_bitmap=0x%x curr_rd_port=0x%x\n",
1089 sdio_card->mp_rd_bitmap, sdio_card->curr_rd_port);
1090 p += sprintf(p, "mp_wr_bitmap=0x%x curr_wr_port=0x%x\n",
1091 sdio_card->mp_wr_bitmap, sdio_card->curr_wr_port);
1092 }
1093
1094 for (i = 0; i < adapter->priv_num; i++) {
1095 if (!adapter->priv[i] || !adapter->priv[i]->netdev)
1096 continue;
1097 priv = adapter->priv[i];
1098 p += sprintf(p, "\n[interface : \"%s\"]\n",
1099 priv->netdev->name);
1100 p += sprintf(p, "wmm_tx_pending[0] = %d\n",
1101 atomic_read(&priv->wmm_tx_pending[0]));
1102 p += sprintf(p, "wmm_tx_pending[1] = %d\n",
1103 atomic_read(&priv->wmm_tx_pending[1]));
1104 p += sprintf(p, "wmm_tx_pending[2] = %d\n",
1105 atomic_read(&priv->wmm_tx_pending[2]));
1106 p += sprintf(p, "wmm_tx_pending[3] = %d\n",
1107 atomic_read(&priv->wmm_tx_pending[3]));
1108 p += sprintf(p, "media_state=\"%s\"\n", !priv->media_connected ?
1109 "Disconnected" : "Connected");
1110 p += sprintf(p, "carrier %s\n", (netif_carrier_ok(priv->netdev)
1111 ? "on" : "off"));
1112 for (idx = 0; idx < priv->netdev->num_tx_queues; idx++) {
1113 txq = netdev_get_tx_queue(priv->netdev, idx);
1114 p += sprintf(p, "tx queue %d:%s ", idx,
1115 netif_tx_queue_stopped(txq) ?
1116 "stopped" : "started");
1117 }
1118 p += sprintf(p, "\n%s: num_tx_timeout = %d\n",
1119 priv->netdev->name, priv->num_tx_timeout);
1120 }
1121
1122 if (adapter->iface_type == MWIFIEX_SDIO ||
1123 adapter->iface_type == MWIFIEX_PCIE) {
1124 p += sprintf(p, "\n=== %s register dump===\n",
1125 adapter->iface_type == MWIFIEX_SDIO ?
1126 "SDIO" : "PCIE");
1127 if (adapter->if_ops.reg_dump)
1128 p += adapter->if_ops.reg_dump(adapter, p);
1129 }
1130 p += sprintf(p, "\n=== more debug information\n");
1131 debug_info = kzalloc(sizeof(*debug_info), GFP_KERNEL);
1132 if (debug_info) {
1133 for (i = 0; i < adapter->priv_num; i++) {
1134 if (!adapter->priv[i] || !adapter->priv[i]->netdev)
1135 continue;
1136 priv = adapter->priv[i];
1137 mwifiex_get_debug_info(priv, debug_info);
1138 p += mwifiex_debug_info_to_buffer(priv, p, debug_info);
1139 break;
1140 }
1141 kfree(debug_info);
1142 }
1143
1144 adapter->drv_info_size = p - adapter->drv_info_dump;
1145 mwifiex_dbg(adapter, MSG, "===mwifiex driverinfo dump end===\n");
1146 }
1147 EXPORT_SYMBOL_GPL(mwifiex_drv_info_dump);
1148
1149 void mwifiex_upload_device_dump(struct mwifiex_adapter *adapter)
1150 {
1151 u8 idx, *dump_data, *fw_dump_ptr;
1152 u32 dump_len;
1153
1154 dump_len = (strlen("========Start dump driverinfo========\n") +
1155 adapter->drv_info_size +
1156 strlen("\n========End dump========\n"));
1157
1158 for (idx = 0; idx < adapter->num_mem_types; idx++) {
1159 struct memory_type_mapping *entry =
1160 &adapter->mem_type_mapping_tbl[idx];
1161
1162 if (entry->mem_ptr) {
1163 dump_len += (strlen("========Start dump ") +
1164 strlen(entry->mem_name) +
1165 strlen("========\n") +
1166 (entry->mem_size + 1) +
1167 strlen("\n========End dump========\n"));
1168 }
1169 }
1170
1171 dump_data = vzalloc(dump_len + 1);
1172 if (!dump_data)
1173 goto done;
1174
1175 fw_dump_ptr = dump_data;
1176
1177 /* Dump all the memory data into single file, a userspace script will
1178 * be used to split all the memory data to multiple files
1179 */
1180 mwifiex_dbg(adapter, MSG,
1181 "== mwifiex dump information to /sys/class/devcoredump start");
1182
1183 strcpy(fw_dump_ptr, "========Start dump driverinfo========\n");
1184 fw_dump_ptr += strlen("========Start dump driverinfo========\n");
1185 memcpy(fw_dump_ptr, adapter->drv_info_dump, adapter->drv_info_size);
1186 fw_dump_ptr += adapter->drv_info_size;
1187 strcpy(fw_dump_ptr, "\n========End dump========\n");
1188 fw_dump_ptr += strlen("\n========End dump========\n");
1189
1190 for (idx = 0; idx < adapter->num_mem_types; idx++) {
1191 struct memory_type_mapping *entry =
1192 &adapter->mem_type_mapping_tbl[idx];
1193
1194 if (entry->mem_ptr) {
1195 strcpy(fw_dump_ptr, "========Start dump ");
1196 fw_dump_ptr += strlen("========Start dump ");
1197
1198 strcpy(fw_dump_ptr, entry->mem_name);
1199 fw_dump_ptr += strlen(entry->mem_name);
1200
1201 strcpy(fw_dump_ptr, "========\n");
1202 fw_dump_ptr += strlen("========\n");
1203
1204 memcpy(fw_dump_ptr, entry->mem_ptr, entry->mem_size);
1205 fw_dump_ptr += entry->mem_size;
1206
1207 strcpy(fw_dump_ptr, "\n========End dump========\n");
1208 fw_dump_ptr += strlen("\n========End dump========\n");
1209 }
1210 }
1211
1212 /* device dump data will be free in device coredump release function
1213 * after 5 min
1214 */
1215 dev_coredumpv(adapter->dev, dump_data, dump_len, GFP_KERNEL);
1216 mwifiex_dbg(adapter, MSG,
1217 "== mwifiex dump information to /sys/class/devcoredump end");
1218
1219 done:
1220 for (idx = 0; idx < adapter->num_mem_types; idx++) {
1221 struct memory_type_mapping *entry =
1222 &adapter->mem_type_mapping_tbl[idx];
1223
1224 if (entry->mem_ptr) {
1225 vfree(entry->mem_ptr);
1226 entry->mem_ptr = NULL;
1227 }
1228 entry->mem_size = 0;
1229 }
1230
1231 if (adapter->drv_info_dump) {
1232 vfree(adapter->drv_info_dump);
1233 adapter->drv_info_dump = NULL;
1234 adapter->drv_info_size = 0;
1235 }
1236 }
1237 EXPORT_SYMBOL_GPL(mwifiex_upload_device_dump);
1238
1239 /*
1240 * CFG802.11 network device handler for statistics retrieval.
1241 */
1242 static struct net_device_stats *mwifiex_get_stats(struct net_device *dev)
1243 {
1244 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
1245
1246 return &priv->stats;
1247 }
1248
1249 static u16
1250 mwifiex_netdev_select_wmm_queue(struct net_device *dev, struct sk_buff *skb,
1251 void *accel_priv, select_queue_fallback_t fallback)
1252 {
1253 skb->priority = cfg80211_classify8021d(skb, NULL);
1254 return mwifiex_1d_to_wmm_queue[skb->priority];
1255 }
1256
1257 /* Network device handlers */
1258 static const struct net_device_ops mwifiex_netdev_ops = {
1259 .ndo_open = mwifiex_open,
1260 .ndo_stop = mwifiex_close,
1261 .ndo_start_xmit = mwifiex_hard_start_xmit,
1262 .ndo_set_mac_address = mwifiex_set_mac_address,
1263 .ndo_validate_addr = eth_validate_addr,
1264 .ndo_tx_timeout = mwifiex_tx_timeout,
1265 .ndo_get_stats = mwifiex_get_stats,
1266 .ndo_set_rx_mode = mwifiex_set_multicast_list,
1267 .ndo_select_queue = mwifiex_netdev_select_wmm_queue,
1268 };
1269
1270 /*
1271 * This function initializes the private structure parameters.
1272 *
1273 * The following wait queues are initialized -
1274 * - IOCTL wait queue
1275 * - Command wait queue
1276 * - Statistics wait queue
1277 *
1278 * ...and the following default parameters are set -
1279 * - Current key index : Set to 0
1280 * - Rate index : Set to auto
1281 * - Media connected : Set to disconnected
1282 * - Adhoc link sensed : Set to false
1283 * - Nick name : Set to null
1284 * - Number of Tx timeout : Set to 0
1285 * - Device address : Set to current address
1286 * - Rx histogram statistc : Set to 0
1287 *
1288 * In addition, the CFG80211 work queue is also created.
1289 */
1290 void mwifiex_init_priv_params(struct mwifiex_private *priv,
1291 struct net_device *dev)
1292 {
1293 dev->netdev_ops = &mwifiex_netdev_ops;
1294 dev->destructor = free_netdev;
1295 /* Initialize private structure */
1296 priv->current_key_index = 0;
1297 priv->media_connected = false;
1298 memset(priv->mgmt_ie, 0,
1299 sizeof(struct mwifiex_ie) * MAX_MGMT_IE_INDEX);
1300 priv->beacon_idx = MWIFIEX_AUTO_IDX_MASK;
1301 priv->proberesp_idx = MWIFIEX_AUTO_IDX_MASK;
1302 priv->assocresp_idx = MWIFIEX_AUTO_IDX_MASK;
1303 priv->gen_idx = MWIFIEX_AUTO_IDX_MASK;
1304 priv->num_tx_timeout = 0;
1305 ether_addr_copy(priv->curr_addr, priv->adapter->perm_addr);
1306 memcpy(dev->dev_addr, priv->curr_addr, ETH_ALEN);
1307
1308 if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA ||
1309 GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_UAP) {
1310 priv->hist_data = kmalloc(sizeof(*priv->hist_data), GFP_KERNEL);
1311 if (priv->hist_data)
1312 mwifiex_hist_data_reset(priv);
1313 }
1314 }
1315
1316 /*
1317 * This function check if command is pending.
1318 */
1319 int is_command_pending(struct mwifiex_adapter *adapter)
1320 {
1321 unsigned long flags;
1322 int is_cmd_pend_q_empty;
1323
1324 spin_lock_irqsave(&adapter->cmd_pending_q_lock, flags);
1325 is_cmd_pend_q_empty = list_empty(&adapter->cmd_pending_q);
1326 spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, flags);
1327
1328 return !is_cmd_pend_q_empty;
1329 }
1330
1331 /*
1332 * This is the RX work queue function.
1333 *
1334 * It handles the RX operations.
1335 */
1336 static void mwifiex_rx_work_queue(struct work_struct *work)
1337 {
1338 struct mwifiex_adapter *adapter =
1339 container_of(work, struct mwifiex_adapter, rx_work);
1340
1341 if (adapter->surprise_removed)
1342 return;
1343 mwifiex_process_rx(adapter);
1344 }
1345
1346 /*
1347 * This is the main work queue function.
1348 *
1349 * It handles the main process, which in turn handles the complete
1350 * driver operations.
1351 */
1352 static void mwifiex_main_work_queue(struct work_struct *work)
1353 {
1354 struct mwifiex_adapter *adapter =
1355 container_of(work, struct mwifiex_adapter, main_work);
1356
1357 if (adapter->surprise_removed)
1358 return;
1359 mwifiex_main_process(adapter);
1360 }
1361
1362 /*
1363 * This function gets called during PCIe function level reset. Required
1364 * code is extracted from mwifiex_remove_card()
1365 */
1366 static int
1367 mwifiex_shutdown_sw(struct mwifiex_adapter *adapter, struct semaphore *sem)
1368 {
1369 struct mwifiex_private *priv;
1370 int i;
1371
1372 if (down_interruptible(sem))
1373 goto exit_sem_err;
1374
1375 if (!adapter)
1376 goto exit_remove;
1377
1378 priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
1379 mwifiex_deauthenticate(priv, NULL);
1380
1381 /* We can no longer handle interrupts once we start doing the teardown
1382 * below.
1383 */
1384 if (adapter->if_ops.disable_int)
1385 adapter->if_ops.disable_int(adapter);
1386
1387 adapter->surprise_removed = true;
1388 mwifiex_terminate_workqueue(adapter);
1389
1390 /* Stop data */
1391 for (i = 0; i < adapter->priv_num; i++) {
1392 priv = adapter->priv[i];
1393 if (priv && priv->netdev) {
1394 mwifiex_stop_net_dev_queue(priv->netdev, adapter);
1395 if (netif_carrier_ok(priv->netdev))
1396 netif_carrier_off(priv->netdev);
1397 netif_device_detach(priv->netdev);
1398 }
1399 }
1400
1401 mwifiex_dbg(adapter, CMD, "cmd: calling mwifiex_shutdown_drv...\n");
1402 adapter->init_wait_q_woken = false;
1403
1404 if (mwifiex_shutdown_drv(adapter) == -EINPROGRESS)
1405 wait_event_interruptible(adapter->init_wait_q,
1406 adapter->init_wait_q_woken);
1407 if (adapter->if_ops.down_dev)
1408 adapter->if_ops.down_dev(adapter);
1409
1410 mwifiex_dbg(adapter, CMD, "cmd: mwifiex_shutdown_drv done\n");
1411 if (atomic_read(&adapter->rx_pending) ||
1412 atomic_read(&adapter->tx_pending) ||
1413 atomic_read(&adapter->cmd_pending)) {
1414 mwifiex_dbg(adapter, ERROR,
1415 "rx_pending=%d, tx_pending=%d,\t"
1416 "cmd_pending=%d\n",
1417 atomic_read(&adapter->rx_pending),
1418 atomic_read(&adapter->tx_pending),
1419 atomic_read(&adapter->cmd_pending));
1420 }
1421
1422 for (i = 0; i < adapter->priv_num; i++) {
1423 priv = adapter->priv[i];
1424 if (!priv)
1425 continue;
1426 rtnl_lock();
1427 if (priv->netdev &&
1428 priv->wdev.iftype != NL80211_IFTYPE_UNSPECIFIED)
1429 mwifiex_del_virtual_intf(adapter->wiphy, &priv->wdev);
1430 rtnl_unlock();
1431 }
1432
1433 exit_remove:
1434 up(sem);
1435 exit_sem_err:
1436 mwifiex_dbg(adapter, INFO, "%s, successful\n", __func__);
1437 return 0;
1438 }
1439
1440 /* This function gets called during PCIe function level reset. Required
1441 * code is extracted from mwifiex_add_card()
1442 */
1443 static int
1444 mwifiex_reinit_sw(struct mwifiex_adapter *adapter, struct semaphore *sem,
1445 struct mwifiex_if_ops *if_ops, u8 iface_type)
1446 {
1447 char fw_name[32];
1448 struct pcie_service_card *card = adapter->card;
1449
1450 if (down_interruptible(sem))
1451 goto exit_sem_err;
1452
1453 mwifiex_init_lock_list(adapter);
1454 if (adapter->if_ops.up_dev)
1455 adapter->if_ops.up_dev(adapter);
1456
1457 adapter->iface_type = iface_type;
1458 adapter->card_sem = sem;
1459
1460 adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
1461 adapter->surprise_removed = false;
1462 init_waitqueue_head(&adapter->init_wait_q);
1463 adapter->is_suspended = false;
1464 adapter->hs_activated = false;
1465 init_waitqueue_head(&adapter->hs_activate_wait_q);
1466 init_waitqueue_head(&adapter->cmd_wait_q.wait);
1467 adapter->cmd_wait_q.status = 0;
1468 adapter->scan_wait_q_woken = false;
1469
1470 if ((num_possible_cpus() > 1) || adapter->iface_type == MWIFIEX_USB)
1471 adapter->rx_work_enabled = true;
1472
1473 adapter->workqueue =
1474 alloc_workqueue("MWIFIEX_WORK_QUEUE",
1475 WQ_HIGHPRI | WQ_MEM_RECLAIM | WQ_UNBOUND, 1);
1476 if (!adapter->workqueue)
1477 goto err_kmalloc;
1478
1479 INIT_WORK(&adapter->main_work, mwifiex_main_work_queue);
1480
1481 if (adapter->rx_work_enabled) {
1482 adapter->rx_workqueue = alloc_workqueue("MWIFIEX_RX_WORK_QUEUE",
1483 WQ_HIGHPRI |
1484 WQ_MEM_RECLAIM |
1485 WQ_UNBOUND, 1);
1486 if (!adapter->rx_workqueue)
1487 goto err_kmalloc;
1488 INIT_WORK(&adapter->rx_work, mwifiex_rx_work_queue);
1489 }
1490
1491 /* Register the device. Fill up the private data structure with
1492 * relevant information from the card. Some code extracted from
1493 * mwifiex_register_dev()
1494 */
1495 mwifiex_dbg(adapter, INFO, "%s, mwifiex_init_hw_fw()...\n", __func__);
1496 strcpy(fw_name, adapter->fw_name);
1497 strcpy(adapter->fw_name, PCIE8997_DEFAULT_WIFIFW_NAME);
1498
1499 adapter->tx_buf_size = card->pcie.tx_buf_size;
1500 adapter->ext_scan = card->pcie.can_ext_scan;
1501 if (mwifiex_init_hw_fw(adapter, false)) {
1502 strcpy(adapter->fw_name, fw_name);
1503 mwifiex_dbg(adapter, ERROR,
1504 "%s: firmware init failed\n", __func__);
1505 goto err_init_fw;
1506 }
1507 strcpy(adapter->fw_name, fw_name);
1508 mwifiex_dbg(adapter, INFO, "%s, successful\n", __func__);
1509 up(sem);
1510 return 0;
1511
1512 err_init_fw:
1513 mwifiex_dbg(adapter, ERROR, "info: %s: unregister device\n", __func__);
1514 if (adapter->if_ops.unregister_dev)
1515 adapter->if_ops.unregister_dev(adapter);
1516 if (adapter->hw_status == MWIFIEX_HW_STATUS_READY) {
1517 mwifiex_dbg(adapter, ERROR,
1518 "info: %s: shutdown mwifiex\n", __func__);
1519 adapter->init_wait_q_woken = false;
1520
1521 if (mwifiex_shutdown_drv(adapter) == -EINPROGRESS)
1522 wait_event_interruptible(adapter->init_wait_q,
1523 adapter->init_wait_q_woken);
1524 }
1525
1526 err_kmalloc:
1527 mwifiex_terminate_workqueue(adapter);
1528 adapter->surprise_removed = true;
1529 up(sem);
1530 exit_sem_err:
1531 mwifiex_dbg(adapter, INFO, "%s, error\n", __func__);
1532
1533 return -1;
1534 }
1535
1536 /* This function processes pre and post PCIe function level resets.
1537 * It performs software cleanup without touching PCIe specific code.
1538 * Also, during initialization PCIe stuff is skipped.
1539 */
1540 void mwifiex_do_flr(struct mwifiex_adapter *adapter, bool prepare)
1541 {
1542 struct mwifiex_if_ops if_ops;
1543
1544 if (!prepare) {
1545 mwifiex_reinit_sw(adapter, adapter->card_sem, &if_ops,
1546 adapter->iface_type);
1547 } else {
1548 memcpy(&if_ops, &adapter->if_ops,
1549 sizeof(struct mwifiex_if_ops));
1550 mwifiex_shutdown_sw(adapter, adapter->card_sem);
1551 }
1552 }
1553 EXPORT_SYMBOL_GPL(mwifiex_do_flr);
1554
1555 /*
1556 * This function adds the card.
1557 *
1558 * This function follows the following major steps to set up the device -
1559 * - Initialize software. This includes probing the card, registering
1560 * the interface operations table, and allocating/initializing the
1561 * adapter structure
1562 * - Set up the netlink socket
1563 * - Create and start the main work queue
1564 * - Register the device
1565 * - Initialize firmware and hardware
1566 * - Add logical interfaces
1567 */
1568 int
1569 mwifiex_add_card(void *card, struct semaphore *sem,
1570 struct mwifiex_if_ops *if_ops, u8 iface_type)
1571 {
1572 struct mwifiex_adapter *adapter;
1573
1574 if (down_interruptible(sem))
1575 goto exit_sem_err;
1576
1577 if (mwifiex_register(card, if_ops, (void **)&adapter)) {
1578 pr_err("%s: software init failed\n", __func__);
1579 goto err_init_sw;
1580 }
1581
1582 adapter->iface_type = iface_type;
1583 adapter->card_sem = sem;
1584
1585 adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
1586 adapter->surprise_removed = false;
1587 init_waitqueue_head(&adapter->init_wait_q);
1588 adapter->is_suspended = false;
1589 adapter->hs_activated = false;
1590 init_waitqueue_head(&adapter->hs_activate_wait_q);
1591 init_waitqueue_head(&adapter->cmd_wait_q.wait);
1592 adapter->cmd_wait_q.status = 0;
1593 adapter->scan_wait_q_woken = false;
1594
1595 if ((num_possible_cpus() > 1) || adapter->iface_type == MWIFIEX_USB) {
1596 adapter->rx_work_enabled = true;
1597 pr_notice("rx work enabled, cpus %d\n", num_possible_cpus());
1598 }
1599
1600 adapter->workqueue =
1601 alloc_workqueue("MWIFIEX_WORK_QUEUE",
1602 WQ_HIGHPRI | WQ_MEM_RECLAIM | WQ_UNBOUND, 1);
1603 if (!adapter->workqueue)
1604 goto err_kmalloc;
1605
1606 INIT_WORK(&adapter->main_work, mwifiex_main_work_queue);
1607
1608 if (adapter->rx_work_enabled) {
1609 adapter->rx_workqueue = alloc_workqueue("MWIFIEX_RX_WORK_QUEUE",
1610 WQ_HIGHPRI |
1611 WQ_MEM_RECLAIM |
1612 WQ_UNBOUND, 1);
1613 if (!adapter->rx_workqueue)
1614 goto err_kmalloc;
1615
1616 INIT_WORK(&adapter->rx_work, mwifiex_rx_work_queue);
1617 }
1618
1619 /* Register the device. Fill up the private data structure with relevant
1620 information from the card. */
1621 if (adapter->if_ops.register_dev(adapter)) {
1622 pr_err("%s: failed to register mwifiex device\n", __func__);
1623 goto err_registerdev;
1624 }
1625
1626 if (mwifiex_init_hw_fw(adapter, true)) {
1627 pr_err("%s: firmware init failed\n", __func__);
1628 goto err_init_fw;
1629 }
1630
1631 return 0;
1632
1633 err_init_fw:
1634 pr_debug("info: %s: unregister device\n", __func__);
1635 if (adapter->if_ops.unregister_dev)
1636 adapter->if_ops.unregister_dev(adapter);
1637 if (adapter->hw_status == MWIFIEX_HW_STATUS_READY) {
1638 pr_debug("info: %s: shutdown mwifiex\n", __func__);
1639 adapter->init_wait_q_woken = false;
1640
1641 if (mwifiex_shutdown_drv(adapter) == -EINPROGRESS)
1642 wait_event_interruptible(adapter->init_wait_q,
1643 adapter->init_wait_q_woken);
1644 }
1645 err_registerdev:
1646 adapter->surprise_removed = true;
1647 mwifiex_terminate_workqueue(adapter);
1648 err_kmalloc:
1649 mwifiex_free_adapter(adapter);
1650
1651 err_init_sw:
1652 up(sem);
1653
1654 exit_sem_err:
1655 return -1;
1656 }
1657 EXPORT_SYMBOL_GPL(mwifiex_add_card);
1658
1659 /*
1660 * This function removes the card.
1661 *
1662 * This function follows the following major steps to remove the device -
1663 * - Stop data traffic
1664 * - Shutdown firmware
1665 * - Remove the logical interfaces
1666 * - Terminate the work queue
1667 * - Unregister the device
1668 * - Free the adapter structure
1669 */
1670 int mwifiex_remove_card(struct mwifiex_adapter *adapter, struct semaphore *sem)
1671 {
1672 struct mwifiex_private *priv = NULL;
1673 int i;
1674
1675 if (down_trylock(sem))
1676 goto exit_sem_err;
1677
1678 if (!adapter)
1679 goto exit_remove;
1680
1681 /* We can no longer handle interrupts once we start doing the teardown
1682 * below. */
1683 if (adapter->if_ops.disable_int)
1684 adapter->if_ops.disable_int(adapter);
1685
1686 adapter->surprise_removed = true;
1687
1688 mwifiex_terminate_workqueue(adapter);
1689
1690 /* Stop data */
1691 for (i = 0; i < adapter->priv_num; i++) {
1692 priv = adapter->priv[i];
1693 if (priv && priv->netdev) {
1694 mwifiex_stop_net_dev_queue(priv->netdev, adapter);
1695 if (netif_carrier_ok(priv->netdev))
1696 netif_carrier_off(priv->netdev);
1697 }
1698 }
1699
1700 mwifiex_dbg(adapter, CMD,
1701 "cmd: calling mwifiex_shutdown_drv...\n");
1702 adapter->init_wait_q_woken = false;
1703
1704 if (mwifiex_shutdown_drv(adapter) == -EINPROGRESS)
1705 wait_event_interruptible(adapter->init_wait_q,
1706 adapter->init_wait_q_woken);
1707 mwifiex_dbg(adapter, CMD,
1708 "cmd: mwifiex_shutdown_drv done\n");
1709 if (atomic_read(&adapter->rx_pending) ||
1710 atomic_read(&adapter->tx_pending) ||
1711 atomic_read(&adapter->cmd_pending)) {
1712 mwifiex_dbg(adapter, ERROR,
1713 "rx_pending=%d, tx_pending=%d,\t"
1714 "cmd_pending=%d\n",
1715 atomic_read(&adapter->rx_pending),
1716 atomic_read(&adapter->tx_pending),
1717 atomic_read(&adapter->cmd_pending));
1718 }
1719
1720 for (i = 0; i < adapter->priv_num; i++) {
1721 priv = adapter->priv[i];
1722
1723 if (!priv)
1724 continue;
1725
1726 rtnl_lock();
1727 if (priv->netdev &&
1728 priv->wdev.iftype != NL80211_IFTYPE_UNSPECIFIED)
1729 mwifiex_del_virtual_intf(adapter->wiphy, &priv->wdev);
1730 rtnl_unlock();
1731 }
1732
1733 wiphy_unregister(adapter->wiphy);
1734 wiphy_free(adapter->wiphy);
1735
1736 /* Unregister device */
1737 mwifiex_dbg(adapter, INFO,
1738 "info: unregister device\n");
1739 if (adapter->if_ops.unregister_dev)
1740 adapter->if_ops.unregister_dev(adapter);
1741 /* Free adapter structure */
1742 mwifiex_dbg(adapter, INFO,
1743 "info: free adapter\n");
1744 mwifiex_free_adapter(adapter);
1745
1746 exit_remove:
1747 up(sem);
1748 exit_sem_err:
1749 return 0;
1750 }
1751 EXPORT_SYMBOL_GPL(mwifiex_remove_card);
1752
1753 void _mwifiex_dbg(const struct mwifiex_adapter *adapter, int mask,
1754 const char *fmt, ...)
1755 {
1756 struct va_format vaf;
1757 va_list args;
1758
1759 if (!adapter->dev || !(adapter->debug_mask & mask))
1760 return;
1761
1762 va_start(args, fmt);
1763
1764 vaf.fmt = fmt;
1765 vaf.va = &args;
1766
1767 dev_info(adapter->dev, "%pV", &vaf);
1768
1769 va_end(args);
1770 }
1771 EXPORT_SYMBOL_GPL(_mwifiex_dbg);
1772
1773 /*
1774 * This function initializes the module.
1775 *
1776 * The debug FS is also initialized if configured.
1777 */
1778 static int
1779 mwifiex_init_module(void)
1780 {
1781 #ifdef CONFIG_DEBUG_FS
1782 mwifiex_debugfs_init();
1783 #endif
1784 return 0;
1785 }
1786
1787 /*
1788 * This function cleans up the module.
1789 *
1790 * The debug FS is removed if available.
1791 */
1792 static void
1793 mwifiex_cleanup_module(void)
1794 {
1795 #ifdef CONFIG_DEBUG_FS
1796 mwifiex_debugfs_remove();
1797 #endif
1798 }
1799
1800 module_init(mwifiex_init_module);
1801 module_exit(mwifiex_cleanup_module);
1802
1803 MODULE_AUTHOR("Marvell International Ltd.");
1804 MODULE_DESCRIPTION("Marvell WiFi-Ex Driver version " VERSION);
1805 MODULE_VERSION(VERSION);
1806 MODULE_LICENSE("GPL v2");
Linux kernel - Deliverables
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