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