2 * Marvell Wireless LAN device driver: major functions
4 * Copyright (C) 2011-2014, Marvell International Ltd.
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.
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.
27 static unsigned int debug_mask = MWIFIEX_DEFAULT_DEBUG_MASK;
28 module_param(debug_mask, uint, 0);
29 MODULE_PARM_DESC(debug_mask, "bitmap for debug flags");
31 const char driver_version[] = "mwifiex " VERSION " (%s) ";
32 static char *cal_data_cfg;
33 module_param(cal_data_cfg, charp, 0);
35 static unsigned short driver_mode;
36 module_param(driver_mode, ushort, 0);
37 MODULE_PARM_DESC(driver_mode,
38 "station=0x1(default), ap-sta=0x3, station-p2p=0x5, ap-sta-p2p=0x7");
41 * This function registers the device and performs all the necessary
44 * The following initialization operations are performed -
45 * - Allocate adapter structure
46 * - Save interface specific operations table in adapter
47 * - Call interface specific initialization routine
48 * - Allocate private structures
49 * - Set default adapter structure parameters
52 * In case of any errors during inittialization, this function also ensures
53 * proper cleanup before exiting.
55 static int mwifiex_register(void *card, struct mwifiex_if_ops *if_ops,
58 struct mwifiex_adapter *adapter;
61 adapter = kzalloc(sizeof(struct mwifiex_adapter), GFP_KERNEL);
68 /* Save interface specific operations in adapter */
69 memmove(&adapter->if_ops, if_ops, sizeof(struct mwifiex_if_ops));
70 adapter->debug_mask = debug_mask;
72 /* card specific initialization has been deferred until now .. */
73 if (adapter->if_ops.init_if)
74 if (adapter->if_ops.init_if(adapter))
77 adapter->priv_num = 0;
79 for (i = 0; i < MWIFIEX_MAX_BSS_NUM; i++) {
80 /* Allocate memory for private structure */
82 kzalloc(sizeof(struct mwifiex_private), GFP_KERNEL);
83 if (!adapter->priv[i])
86 adapter->priv[i]->adapter = adapter;
89 mwifiex_init_lock_list(adapter);
91 setup_timer(&adapter->cmd_timer, mwifiex_cmd_timeout_func,
92 (unsigned long)adapter);
97 mwifiex_dbg(adapter, ERROR,
98 "info: leave mwifiex_register with error\n");
100 for (i = 0; i < adapter->priv_num; i++)
101 kfree(adapter->priv[i]);
109 * This function unregisters the device and performs all the necessary
112 * The following cleanup operations are performed -
114 * - Free beacon buffers
115 * - Free private structures
116 * - Free adapter structure
118 static int mwifiex_unregister(struct mwifiex_adapter *adapter)
122 if (adapter->if_ops.cleanup_if)
123 adapter->if_ops.cleanup_if(adapter);
125 del_timer_sync(&adapter->cmd_timer);
127 /* Free private structures */
128 for (i = 0; i < adapter->priv_num; i++) {
129 if (adapter->priv[i]) {
130 mwifiex_free_curr_bcn(adapter->priv[i]);
131 kfree(adapter->priv[i]);
135 vfree(adapter->chan_stats);
140 void mwifiex_queue_main_work(struct mwifiex_adapter *adapter)
144 spin_lock_irqsave(&adapter->main_proc_lock, flags);
145 if (adapter->mwifiex_processing) {
146 adapter->more_task_flag = true;
147 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
149 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
150 queue_work(adapter->workqueue, &adapter->main_work);
153 EXPORT_SYMBOL_GPL(mwifiex_queue_main_work);
155 static void mwifiex_queue_rx_work(struct mwifiex_adapter *adapter)
159 spin_lock_irqsave(&adapter->rx_proc_lock, flags);
160 if (adapter->rx_processing) {
161 spin_unlock_irqrestore(&adapter->rx_proc_lock, flags);
163 spin_unlock_irqrestore(&adapter->rx_proc_lock, flags);
164 queue_work(adapter->rx_workqueue, &adapter->rx_work);
168 static int mwifiex_process_rx(struct mwifiex_adapter *adapter)
172 struct mwifiex_rxinfo *rx_info;
174 spin_lock_irqsave(&adapter->rx_proc_lock, flags);
175 if (adapter->rx_processing || adapter->rx_locked) {
176 spin_unlock_irqrestore(&adapter->rx_proc_lock, flags);
179 adapter->rx_processing = true;
180 spin_unlock_irqrestore(&adapter->rx_proc_lock, flags);
183 /* Check for Rx data */
184 while ((skb = skb_dequeue(&adapter->rx_data_q))) {
185 atomic_dec(&adapter->rx_pending);
186 if ((adapter->delay_main_work ||
187 adapter->iface_type == MWIFIEX_USB) &&
188 (atomic_read(&adapter->rx_pending) < LOW_RX_PENDING)) {
189 if (adapter->if_ops.submit_rem_rx_urbs)
190 adapter->if_ops.submit_rem_rx_urbs(adapter);
191 adapter->delay_main_work = false;
192 mwifiex_queue_main_work(adapter);
194 rx_info = MWIFIEX_SKB_RXCB(skb);
195 if (rx_info->buf_type == MWIFIEX_TYPE_AGGR_DATA) {
196 if (adapter->if_ops.deaggr_pkt)
197 adapter->if_ops.deaggr_pkt(adapter, skb);
198 dev_kfree_skb_any(skb);
200 mwifiex_handle_rx_packet(adapter, skb);
203 spin_lock_irqsave(&adapter->rx_proc_lock, flags);
204 adapter->rx_processing = false;
205 spin_unlock_irqrestore(&adapter->rx_proc_lock, flags);
214 * This function is the main procedure of the driver and handles various driver
215 * operations. It runs in a loop and provides the core functionalities.
217 * The main responsibilities of this function are -
218 * - Ensure concurrency control
219 * - Handle pending interrupts and call interrupt handlers
220 * - Wake up the card if required
221 * - Handle command responses and call response handlers
222 * - Handle events and call event handlers
223 * - Execute pending commands
224 * - Transmit pending data packets
226 int mwifiex_main_process(struct mwifiex_adapter *adapter)
231 spin_lock_irqsave(&adapter->main_proc_lock, flags);
233 /* Check if already processing */
234 if (adapter->mwifiex_processing || adapter->main_locked) {
235 adapter->more_task_flag = true;
236 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
239 adapter->mwifiex_processing = true;
240 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
244 if ((adapter->hw_status == MWIFIEX_HW_STATUS_CLOSING) ||
245 (adapter->hw_status == MWIFIEX_HW_STATUS_NOT_READY))
248 /* For non-USB interfaces, If we process interrupts first, it
249 * would increase RX pending even further. Avoid this by
250 * checking if rx_pending has crossed high threshold and
251 * schedule rx work queue and then process interrupts.
252 * For USB interface, there are no interrupts. We already have
253 * HIGH_RX_PENDING check in usb.c
255 if (atomic_read(&adapter->rx_pending) >= HIGH_RX_PENDING &&
256 adapter->iface_type != MWIFIEX_USB) {
257 adapter->delay_main_work = true;
258 mwifiex_queue_rx_work(adapter);
262 /* Handle pending interrupt if any */
263 if (adapter->int_status) {
264 if (adapter->hs_activated)
265 mwifiex_process_hs_config(adapter);
266 if (adapter->if_ops.process_int_status)
267 adapter->if_ops.process_int_status(adapter);
270 if (adapter->rx_work_enabled && adapter->data_received)
271 mwifiex_queue_rx_work(adapter);
273 /* Need to wake up the card ? */
274 if ((adapter->ps_state == PS_STATE_SLEEP) &&
275 (adapter->pm_wakeup_card_req &&
276 !adapter->pm_wakeup_fw_try) &&
277 (is_command_pending(adapter) ||
278 !skb_queue_empty(&adapter->tx_data_q) ||
279 !mwifiex_bypass_txlist_empty(adapter) ||
280 !mwifiex_wmm_lists_empty(adapter))) {
281 adapter->pm_wakeup_fw_try = true;
282 mod_timer(&adapter->wakeup_timer, jiffies + (HZ*3));
283 adapter->if_ops.wakeup(adapter);
287 if (IS_CARD_RX_RCVD(adapter)) {
288 adapter->data_received = false;
289 adapter->pm_wakeup_fw_try = false;
290 del_timer(&adapter->wakeup_timer);
291 if (adapter->ps_state == PS_STATE_SLEEP)
292 adapter->ps_state = PS_STATE_AWAKE;
294 /* We have tried to wakeup the card already */
295 if (adapter->pm_wakeup_fw_try)
297 if (adapter->ps_state != PS_STATE_AWAKE ||
298 adapter->tx_lock_flag)
301 if ((!adapter->scan_chan_gap_enabled &&
302 adapter->scan_processing) || adapter->data_sent ||
303 mwifiex_is_tdls_chan_switching
304 (mwifiex_get_priv(adapter,
305 MWIFIEX_BSS_ROLE_STA)) ||
306 (mwifiex_wmm_lists_empty(adapter) &&
307 mwifiex_bypass_txlist_empty(adapter) &&
308 skb_queue_empty(&adapter->tx_data_q))) {
309 if (adapter->cmd_sent || adapter->curr_cmd ||
310 !mwifiex_is_send_cmd_allowed
311 (mwifiex_get_priv(adapter,
312 MWIFIEX_BSS_ROLE_STA)) ||
313 (!is_command_pending(adapter)))
318 /* Check for event */
319 if (adapter->event_received) {
320 adapter->event_received = false;
321 mwifiex_process_event(adapter);
324 /* Check for Cmd Resp */
325 if (adapter->cmd_resp_received) {
326 adapter->cmd_resp_received = false;
327 mwifiex_process_cmdresp(adapter);
329 /* call mwifiex back when init_fw is done */
330 if (adapter->hw_status == MWIFIEX_HW_STATUS_INIT_DONE) {
331 adapter->hw_status = MWIFIEX_HW_STATUS_READY;
332 mwifiex_init_fw_complete(adapter);
336 /* Check if we need to confirm Sleep Request
337 received previously */
338 if (adapter->ps_state == PS_STATE_PRE_SLEEP) {
339 if (!adapter->cmd_sent && !adapter->curr_cmd)
340 mwifiex_check_ps_cond(adapter);
343 /* * The ps_state may have been changed during processing of
344 * Sleep Request event.
346 if ((adapter->ps_state == PS_STATE_SLEEP) ||
347 (adapter->ps_state == PS_STATE_PRE_SLEEP) ||
348 (adapter->ps_state == PS_STATE_SLEEP_CFM) ||
349 adapter->tx_lock_flag){
353 if (!adapter->cmd_sent && !adapter->curr_cmd &&
354 mwifiex_is_send_cmd_allowed
355 (mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA))) {
356 if (mwifiex_exec_next_cmd(adapter) == -1) {
362 if ((adapter->scan_chan_gap_enabled ||
363 !adapter->scan_processing) &&
364 !adapter->data_sent &&
365 !skb_queue_empty(&adapter->tx_data_q)) {
366 mwifiex_process_tx_queue(adapter);
367 if (adapter->hs_activated) {
368 adapter->is_hs_configured = false;
369 mwifiex_hs_activated_event
371 (adapter, MWIFIEX_BSS_ROLE_ANY),
376 if ((adapter->scan_chan_gap_enabled ||
377 !adapter->scan_processing) &&
378 !adapter->data_sent &&
379 !mwifiex_bypass_txlist_empty(adapter) &&
380 !mwifiex_is_tdls_chan_switching
381 (mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA))) {
382 mwifiex_process_bypass_tx(adapter);
383 if (adapter->hs_activated) {
384 adapter->is_hs_configured = false;
385 mwifiex_hs_activated_event
387 (adapter, MWIFIEX_BSS_ROLE_ANY),
392 if ((adapter->scan_chan_gap_enabled ||
393 !adapter->scan_processing) &&
394 !adapter->data_sent && !mwifiex_wmm_lists_empty(adapter) &&
395 !mwifiex_is_tdls_chan_switching
396 (mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA))) {
397 mwifiex_wmm_process_tx(adapter);
398 if (adapter->hs_activated) {
399 adapter->is_hs_configured = false;
400 mwifiex_hs_activated_event
402 (adapter, MWIFIEX_BSS_ROLE_ANY),
407 if (adapter->delay_null_pkt && !adapter->cmd_sent &&
408 !adapter->curr_cmd && !is_command_pending(adapter) &&
409 (mwifiex_wmm_lists_empty(adapter) &&
410 mwifiex_bypass_txlist_empty(adapter) &&
411 skb_queue_empty(&adapter->tx_data_q))) {
412 if (!mwifiex_send_null_packet
413 (mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA),
414 MWIFIEX_TxPD_POWER_MGMT_NULL_PACKET |
415 MWIFIEX_TxPD_POWER_MGMT_LAST_PACKET)) {
416 adapter->delay_null_pkt = false;
417 adapter->ps_state = PS_STATE_SLEEP;
423 spin_lock_irqsave(&adapter->main_proc_lock, flags);
424 if (adapter->more_task_flag) {
425 adapter->more_task_flag = false;
426 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
429 adapter->mwifiex_processing = false;
430 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
433 if (adapter->hw_status == MWIFIEX_HW_STATUS_CLOSING)
434 mwifiex_shutdown_drv(adapter);
437 EXPORT_SYMBOL_GPL(mwifiex_main_process);
440 * This function frees the adapter structure.
442 * Additionally, this closes the netlink socket, frees the timers
443 * and private structures.
445 static void mwifiex_free_adapter(struct mwifiex_adapter *adapter)
448 pr_err("%s: adapter is NULL\n", __func__);
452 mwifiex_unregister(adapter);
453 pr_debug("info: %s: free adapter\n", __func__);
457 * This function cancels all works in the queue and destroys
458 * the main workqueue.
460 static void mwifiex_terminate_workqueue(struct mwifiex_adapter *adapter)
462 flush_workqueue(adapter->workqueue);
463 destroy_workqueue(adapter->workqueue);
464 adapter->workqueue = NULL;
466 if (adapter->rx_workqueue) {
467 flush_workqueue(adapter->rx_workqueue);
468 destroy_workqueue(adapter->rx_workqueue);
469 adapter->rx_workqueue = NULL;
474 * This function gets firmware and initializes it.
476 * The main initialization steps followed are -
477 * - Download the correct firmware to card
478 * - Issue the init commands to firmware
480 static void mwifiex_fw_dpc(const struct firmware *firmware, void *context)
484 struct mwifiex_private *priv;
485 struct mwifiex_adapter *adapter = context;
486 struct mwifiex_fw_image fw;
487 struct semaphore *sem = adapter->card_sem;
488 bool init_failed = false;
489 struct wireless_dev *wdev;
492 mwifiex_dbg(adapter, ERROR,
493 "Failed to get firmware %s\n", adapter->fw_name);
497 memset(&fw, 0, sizeof(struct mwifiex_fw_image));
498 adapter->firmware = firmware;
499 fw.fw_buf = (u8 *) adapter->firmware->data;
500 fw.fw_len = adapter->firmware->size;
502 if (adapter->if_ops.dnld_fw)
503 ret = adapter->if_ops.dnld_fw(adapter, &fw);
505 ret = mwifiex_dnld_fw(adapter, &fw);
509 mwifiex_dbg(adapter, MSG, "WLAN FW is active\n");
512 if ((request_firmware(&adapter->cal_data, cal_data_cfg,
514 mwifiex_dbg(adapter, ERROR,
515 "Cal data request_firmware() failed\n");
518 /* enable host interrupt after fw dnld is successful */
519 if (adapter->if_ops.enable_int) {
520 if (adapter->if_ops.enable_int(adapter))
524 adapter->init_wait_q_woken = false;
525 ret = mwifiex_init_fw(adapter);
529 adapter->hw_status = MWIFIEX_HW_STATUS_READY;
532 /* Wait for mwifiex_init to complete */
533 wait_event_interruptible(adapter->init_wait_q,
534 adapter->init_wait_q_woken);
535 if (adapter->hw_status != MWIFIEX_HW_STATUS_READY)
538 priv = adapter->priv[MWIFIEX_BSS_ROLE_STA];
539 if (mwifiex_register_cfg80211(adapter)) {
540 mwifiex_dbg(adapter, ERROR,
541 "cannot register with cfg80211\n");
545 if (mwifiex_init_channel_scan_gap(adapter)) {
546 mwifiex_dbg(adapter, ERROR,
547 "could not init channel stats table\n");
552 driver_mode &= MWIFIEX_DRIVER_MODE_BITMASK;
553 driver_mode |= MWIFIEX_DRIVER_MODE_STA;
557 /* Create station interface by default */
558 wdev = mwifiex_add_virtual_intf(adapter->wiphy, "mlan%d", NET_NAME_ENUM,
559 NL80211_IFTYPE_STATION, NULL, NULL);
561 mwifiex_dbg(adapter, ERROR,
562 "cannot create default STA interface\n");
567 if (driver_mode & MWIFIEX_DRIVER_MODE_UAP) {
568 wdev = mwifiex_add_virtual_intf(adapter->wiphy, "uap%d", NET_NAME_ENUM,
569 NL80211_IFTYPE_AP, NULL, NULL);
571 mwifiex_dbg(adapter, ERROR,
572 "cannot create AP interface\n");
578 if (driver_mode & MWIFIEX_DRIVER_MODE_P2P) {
579 wdev = mwifiex_add_virtual_intf(adapter->wiphy, "p2p%d", NET_NAME_ENUM,
580 NL80211_IFTYPE_P2P_CLIENT, NULL,
583 mwifiex_dbg(adapter, ERROR,
584 "cannot create p2p client interface\n");
591 mwifiex_drv_get_driver_version(adapter, fmt, sizeof(fmt) - 1);
592 mwifiex_dbg(adapter, MSG, "driver_version = %s\n", fmt);
596 wiphy_unregister(adapter->wiphy);
597 wiphy_free(adapter->wiphy);
599 if (adapter->if_ops.disable_int)
600 adapter->if_ops.disable_int(adapter);
602 mwifiex_dbg(adapter, ERROR,
603 "info: %s: unregister device\n", __func__);
604 if (adapter->if_ops.unregister_dev)
605 adapter->if_ops.unregister_dev(adapter);
607 if (adapter->hw_status == MWIFIEX_HW_STATUS_READY) {
608 pr_debug("info: %s: shutdown mwifiex\n", __func__);
609 adapter->init_wait_q_woken = false;
611 if (mwifiex_shutdown_drv(adapter) == -EINPROGRESS)
612 wait_event_interruptible(adapter->init_wait_q,
613 adapter->init_wait_q_woken);
615 adapter->surprise_removed = true;
616 mwifiex_terminate_workqueue(adapter);
619 if (adapter->cal_data) {
620 release_firmware(adapter->cal_data);
621 adapter->cal_data = NULL;
623 if (adapter->firmware) {
624 release_firmware(adapter->firmware);
625 adapter->firmware = NULL;
628 mwifiex_free_adapter(adapter);
634 * This function initializes the hardware and gets firmware.
636 static int mwifiex_init_hw_fw(struct mwifiex_adapter *adapter)
640 ret = request_firmware_nowait(THIS_MODULE, 1, adapter->fw_name,
641 adapter->dev, GFP_KERNEL, adapter,
644 mwifiex_dbg(adapter, ERROR,
645 "request_firmware_nowait error %d\n", ret);
650 * CFG802.11 network device handler for open.
652 * Starts the data queue.
655 mwifiex_open(struct net_device *dev)
657 netif_carrier_off(dev);
663 * CFG802.11 network device handler for close.
666 mwifiex_close(struct net_device *dev)
668 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
670 if (priv->scan_request) {
671 mwifiex_dbg(priv->adapter, INFO,
672 "aborting scan on ndo_stop\n");
673 cfg80211_scan_done(priv->scan_request, 1);
674 priv->scan_request = NULL;
675 priv->scan_aborting = true;
682 mwifiex_bypass_tx_queue(struct mwifiex_private *priv,
685 struct ethhdr *eth_hdr = (struct ethhdr *)skb->data;
687 if (ntohs(eth_hdr->h_proto) == ETH_P_PAE ||
688 mwifiex_is_skb_mgmt_frame(skb) ||
689 (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA &&
690 ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) &&
691 (ntohs(eth_hdr->h_proto) == ETH_P_TDLS))) {
692 mwifiex_dbg(priv->adapter, DATA,
693 "bypass txqueue; eth type %#x, mgmt %d\n",
694 ntohs(eth_hdr->h_proto),
695 mwifiex_is_skb_mgmt_frame(skb));
702 * Add buffer into wmm tx queue and queue work to transmit it.
704 int mwifiex_queue_tx_pkt(struct mwifiex_private *priv, struct sk_buff *skb)
706 struct netdev_queue *txq;
707 int index = mwifiex_1d_to_wmm_queue[skb->priority];
709 if (atomic_inc_return(&priv->wmm_tx_pending[index]) >= MAX_TX_PENDING) {
710 txq = netdev_get_tx_queue(priv->netdev, index);
711 if (!netif_tx_queue_stopped(txq)) {
712 netif_tx_stop_queue(txq);
713 mwifiex_dbg(priv->adapter, DATA,
714 "stop queue: %d\n", index);
718 if (mwifiex_bypass_tx_queue(priv, skb)) {
719 atomic_inc(&priv->adapter->tx_pending);
720 atomic_inc(&priv->adapter->bypass_tx_pending);
721 mwifiex_wmm_add_buf_bypass_txqueue(priv, skb);
723 atomic_inc(&priv->adapter->tx_pending);
724 mwifiex_wmm_add_buf_txqueue(priv, skb);
727 mwifiex_queue_main_work(priv->adapter);
733 mwifiex_clone_skb_for_tx_status(struct mwifiex_private *priv,
734 struct sk_buff *skb, u8 flag, u64 *cookie)
736 struct sk_buff *orig_skb = skb;
737 struct mwifiex_txinfo *tx_info, *orig_tx_info;
739 skb = skb_clone(skb, GFP_ATOMIC);
744 spin_lock_irqsave(&priv->ack_status_lock, flags);
745 id = idr_alloc(&priv->ack_status_frames, orig_skb,
746 1, 0xff, GFP_ATOMIC);
747 spin_unlock_irqrestore(&priv->ack_status_lock, flags);
750 tx_info = MWIFIEX_SKB_TXCB(skb);
751 tx_info->ack_frame_id = id;
752 tx_info->flags |= flag;
753 orig_tx_info = MWIFIEX_SKB_TXCB(orig_skb);
754 orig_tx_info->ack_frame_id = id;
755 orig_tx_info->flags |= flag;
757 if (flag == MWIFIEX_BUF_FLAG_ACTION_TX_STATUS && cookie)
758 orig_tx_info->cookie = *cookie;
760 } else if (skb_shared(skb)) {
767 /* couldn't clone -- lose tx status ... */
775 * CFG802.11 network device handler for data transmission.
778 mwifiex_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
780 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
781 struct sk_buff *new_skb;
782 struct mwifiex_txinfo *tx_info;
785 mwifiex_dbg(priv->adapter, DATA,
786 "data: %lu BSS(%d-%d): Data <= kernel\n",
787 jiffies, priv->bss_type, priv->bss_num);
789 if (priv->adapter->surprise_removed) {
791 priv->stats.tx_dropped++;
794 if (!skb->len || (skb->len > ETH_FRAME_LEN)) {
795 mwifiex_dbg(priv->adapter, ERROR,
796 "Tx: bad skb len %d\n", skb->len);
798 priv->stats.tx_dropped++;
801 if (skb_headroom(skb) < MWIFIEX_MIN_DATA_HEADER_LEN) {
802 mwifiex_dbg(priv->adapter, DATA,
803 "data: Tx: insufficient skb headroom %d\n",
805 /* Insufficient skb headroom - allocate a new skb */
807 skb_realloc_headroom(skb, MWIFIEX_MIN_DATA_HEADER_LEN);
808 if (unlikely(!new_skb)) {
809 mwifiex_dbg(priv->adapter, ERROR,
810 "Tx: cannot alloca new_skb\n");
812 priv->stats.tx_dropped++;
817 mwifiex_dbg(priv->adapter, INFO,
818 "info: new skb headroomd %d\n",
822 tx_info = MWIFIEX_SKB_TXCB(skb);
823 memset(tx_info, 0, sizeof(*tx_info));
824 tx_info->bss_num = priv->bss_num;
825 tx_info->bss_type = priv->bss_type;
826 tx_info->pkt_len = skb->len;
828 multicast = is_multicast_ether_addr(skb->data);
830 if (unlikely(!multicast && skb->sk &&
831 skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS &&
832 priv->adapter->fw_api_ver == MWIFIEX_FW_V15))
833 skb = mwifiex_clone_skb_for_tx_status(priv,
835 MWIFIEX_BUF_FLAG_EAPOL_TX_STATUS, NULL);
837 /* Record the current time the packet was queued; used to
838 * determine the amount of time the packet was queued in
839 * the driver before it was sent to the firmware.
840 * The delay is then sent along with the packet to the
841 * firmware for aggregate delay calculation for stats and
842 * MSDU lifetime expiry.
844 __net_timestamp(skb);
846 if (ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) &&
847 priv->bss_type == MWIFIEX_BSS_TYPE_STA &&
848 !ether_addr_equal_unaligned(priv->cfg_bssid, skb->data)) {
849 if (priv->adapter->auto_tdls && priv->check_tdls_tx)
850 mwifiex_tdls_check_tx(priv, skb);
853 mwifiex_queue_tx_pkt(priv, skb);
859 * CFG802.11 network device handler for setting MAC address.
862 mwifiex_set_mac_address(struct net_device *dev, void *addr)
864 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
865 struct sockaddr *hw_addr = addr;
868 memcpy(priv->curr_addr, hw_addr->sa_data, ETH_ALEN);
870 /* Send request to firmware */
871 ret = mwifiex_send_cmd(priv, HostCmd_CMD_802_11_MAC_ADDRESS,
872 HostCmd_ACT_GEN_SET, 0, NULL, true);
875 memcpy(priv->netdev->dev_addr, priv->curr_addr, ETH_ALEN);
877 mwifiex_dbg(priv->adapter, ERROR,
878 "set mac address failed: ret=%d\n", ret);
880 memcpy(dev->dev_addr, priv->curr_addr, ETH_ALEN);
886 * CFG802.11 network device handler for setting multicast list.
888 static void mwifiex_set_multicast_list(struct net_device *dev)
890 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
891 struct mwifiex_multicast_list mcast_list;
893 if (dev->flags & IFF_PROMISC) {
894 mcast_list.mode = MWIFIEX_PROMISC_MODE;
895 } else if (dev->flags & IFF_ALLMULTI ||
896 netdev_mc_count(dev) > MWIFIEX_MAX_MULTICAST_LIST_SIZE) {
897 mcast_list.mode = MWIFIEX_ALL_MULTI_MODE;
899 mcast_list.mode = MWIFIEX_MULTICAST_MODE;
900 mcast_list.num_multicast_addr =
901 mwifiex_copy_mcast_addr(&mcast_list, dev);
903 mwifiex_request_set_multicast_list(priv, &mcast_list);
907 * CFG802.11 network device handler for transmission timeout.
910 mwifiex_tx_timeout(struct net_device *dev)
912 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
914 priv->num_tx_timeout++;
915 priv->tx_timeout_cnt++;
916 mwifiex_dbg(priv->adapter, ERROR,
917 "%lu : Tx timeout(#%d), bss_type-num = %d-%d\n",
918 jiffies, priv->tx_timeout_cnt, priv->bss_type,
920 mwifiex_set_trans_start(dev);
922 if (priv->tx_timeout_cnt > TX_TIMEOUT_THRESHOLD &&
923 priv->adapter->if_ops.card_reset) {
924 mwifiex_dbg(priv->adapter, ERROR,
925 "tx_timeout_cnt exceeds threshold.\t"
926 "Triggering card reset!\n");
927 priv->adapter->if_ops.card_reset(priv->adapter);
931 void mwifiex_drv_info_dump(struct mwifiex_adapter *adapter)
934 char drv_version[64];
935 struct usb_card_rec *cardp;
936 struct sdio_mmc_card *sdio_card;
937 struct mwifiex_private *priv;
939 struct netdev_queue *txq;
940 struct mwifiex_debug_info *debug_info;
942 if (adapter->drv_info_dump) {
943 vfree(adapter->drv_info_dump);
944 adapter->drv_info_dump = NULL;
945 adapter->drv_info_size = 0;
948 mwifiex_dbg(adapter, MSG, "===mwifiex driverinfo dump start===\n");
950 adapter->drv_info_dump = vzalloc(MWIFIEX_DRV_INFO_SIZE_MAX);
952 if (!adapter->drv_info_dump)
955 p = (char *)(adapter->drv_info_dump);
956 p += sprintf(p, "driver_name = " "\"mwifiex\"\n");
958 mwifiex_drv_get_driver_version(adapter, drv_version,
959 sizeof(drv_version) - 1);
960 p += sprintf(p, "driver_version = %s\n", drv_version);
962 if (adapter->iface_type == MWIFIEX_USB) {
963 cardp = (struct usb_card_rec *)adapter->card;
964 p += sprintf(p, "tx_cmd_urb_pending = %d\n",
965 atomic_read(&cardp->tx_cmd_urb_pending));
966 p += sprintf(p, "tx_data_urb_pending = %d\n",
967 atomic_read(&cardp->tx_data_urb_pending));
968 p += sprintf(p, "rx_cmd_urb_pending = %d\n",
969 atomic_read(&cardp->rx_cmd_urb_pending));
970 p += sprintf(p, "rx_data_urb_pending = %d\n",
971 atomic_read(&cardp->rx_data_urb_pending));
974 p += sprintf(p, "tx_pending = %d\n",
975 atomic_read(&adapter->tx_pending));
976 p += sprintf(p, "rx_pending = %d\n",
977 atomic_read(&adapter->rx_pending));
979 if (adapter->iface_type == MWIFIEX_SDIO) {
980 sdio_card = (struct sdio_mmc_card *)adapter->card;
981 p += sprintf(p, "\nmp_rd_bitmap=0x%x curr_rd_port=0x%x\n",
982 sdio_card->mp_rd_bitmap, sdio_card->curr_rd_port);
983 p += sprintf(p, "mp_wr_bitmap=0x%x curr_wr_port=0x%x\n",
984 sdio_card->mp_wr_bitmap, sdio_card->curr_wr_port);
987 for (i = 0; i < adapter->priv_num; i++) {
988 if (!adapter->priv[i] || !adapter->priv[i]->netdev)
990 priv = adapter->priv[i];
991 p += sprintf(p, "\n[interface : \"%s\"]\n",
993 p += sprintf(p, "wmm_tx_pending[0] = %d\n",
994 atomic_read(&priv->wmm_tx_pending[0]));
995 p += sprintf(p, "wmm_tx_pending[1] = %d\n",
996 atomic_read(&priv->wmm_tx_pending[1]));
997 p += sprintf(p, "wmm_tx_pending[2] = %d\n",
998 atomic_read(&priv->wmm_tx_pending[2]));
999 p += sprintf(p, "wmm_tx_pending[3] = %d\n",
1000 atomic_read(&priv->wmm_tx_pending[3]));
1001 p += sprintf(p, "media_state=\"%s\"\n", !priv->media_connected ?
1002 "Disconnected" : "Connected");
1003 p += sprintf(p, "carrier %s\n", (netif_carrier_ok(priv->netdev)
1005 for (idx = 0; idx < priv->netdev->num_tx_queues; idx++) {
1006 txq = netdev_get_tx_queue(priv->netdev, idx);
1007 p += sprintf(p, "tx queue %d:%s ", idx,
1008 netif_tx_queue_stopped(txq) ?
1009 "stopped" : "started");
1011 p += sprintf(p, "\n%s: num_tx_timeout = %d\n",
1012 priv->netdev->name, priv->num_tx_timeout);
1015 if (adapter->iface_type == MWIFIEX_SDIO) {
1016 p += sprintf(p, "\n=== SDIO register dump===\n");
1017 if (adapter->if_ops.reg_dump)
1018 p += adapter->if_ops.reg_dump(adapter, p);
1021 p += sprintf(p, "\n=== more debug information\n");
1022 debug_info = kzalloc(sizeof(*debug_info), GFP_KERNEL);
1024 for (i = 0; i < adapter->priv_num; i++) {
1025 if (!adapter->priv[i] || !adapter->priv[i]->netdev)
1027 priv = adapter->priv[i];
1028 mwifiex_get_debug_info(priv, debug_info);
1029 p += mwifiex_debug_info_to_buffer(priv, p, debug_info);
1035 adapter->drv_info_size = p - adapter->drv_info_dump;
1036 mwifiex_dbg(adapter, MSG, "===mwifiex driverinfo dump end===\n");
1038 EXPORT_SYMBOL_GPL(mwifiex_drv_info_dump);
1040 void mwifiex_upload_device_dump(struct mwifiex_adapter *adapter)
1042 u8 idx, *dump_data, *fw_dump_ptr;
1045 dump_len = (strlen("========Start dump driverinfo========\n") +
1046 adapter->drv_info_size +
1047 strlen("\n========End dump========\n"));
1049 for (idx = 0; idx < adapter->num_mem_types; idx++) {
1050 struct memory_type_mapping *entry =
1051 &adapter->mem_type_mapping_tbl[idx];
1053 if (entry->mem_ptr) {
1054 dump_len += (strlen("========Start dump ") +
1055 strlen(entry->mem_name) +
1056 strlen("========\n") +
1057 (entry->mem_size + 1) +
1058 strlen("\n========End dump========\n"));
1062 dump_data = vzalloc(dump_len + 1);
1066 fw_dump_ptr = dump_data;
1068 /* Dump all the memory data into single file, a userspace script will
1069 * be used to split all the memory data to multiple files
1071 mwifiex_dbg(adapter, MSG,
1072 "== mwifiex dump information to /sys/class/devcoredump start");
1074 strcpy(fw_dump_ptr, "========Start dump driverinfo========\n");
1075 fw_dump_ptr += strlen("========Start dump driverinfo========\n");
1076 memcpy(fw_dump_ptr, adapter->drv_info_dump, adapter->drv_info_size);
1077 fw_dump_ptr += adapter->drv_info_size;
1078 strcpy(fw_dump_ptr, "\n========End dump========\n");
1079 fw_dump_ptr += strlen("\n========End dump========\n");
1081 for (idx = 0; idx < adapter->num_mem_types; idx++) {
1082 struct memory_type_mapping *entry =
1083 &adapter->mem_type_mapping_tbl[idx];
1085 if (entry->mem_ptr) {
1086 strcpy(fw_dump_ptr, "========Start dump ");
1087 fw_dump_ptr += strlen("========Start dump ");
1089 strcpy(fw_dump_ptr, entry->mem_name);
1090 fw_dump_ptr += strlen(entry->mem_name);
1092 strcpy(fw_dump_ptr, "========\n");
1093 fw_dump_ptr += strlen("========\n");
1095 memcpy(fw_dump_ptr, entry->mem_ptr, entry->mem_size);
1096 fw_dump_ptr += entry->mem_size;
1098 strcpy(fw_dump_ptr, "\n========End dump========\n");
1099 fw_dump_ptr += strlen("\n========End dump========\n");
1103 /* device dump data will be free in device coredump release function
1106 dev_coredumpv(adapter->dev, dump_data, dump_len, GFP_KERNEL);
1107 mwifiex_dbg(adapter, MSG,
1108 "== mwifiex dump information to /sys/class/devcoredump end");
1111 for (idx = 0; idx < adapter->num_mem_types; idx++) {
1112 struct memory_type_mapping *entry =
1113 &adapter->mem_type_mapping_tbl[idx];
1115 if (entry->mem_ptr) {
1116 vfree(entry->mem_ptr);
1117 entry->mem_ptr = NULL;
1119 entry->mem_size = 0;
1122 if (adapter->drv_info_dump) {
1123 vfree(adapter->drv_info_dump);
1124 adapter->drv_info_dump = NULL;
1125 adapter->drv_info_size = 0;
1128 EXPORT_SYMBOL_GPL(mwifiex_upload_device_dump);
1131 * CFG802.11 network device handler for statistics retrieval.
1133 static struct net_device_stats *mwifiex_get_stats(struct net_device *dev)
1135 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
1137 return &priv->stats;
1141 mwifiex_netdev_select_wmm_queue(struct net_device *dev, struct sk_buff *skb,
1142 void *accel_priv, select_queue_fallback_t fallback)
1144 skb->priority = cfg80211_classify8021d(skb, NULL);
1145 return mwifiex_1d_to_wmm_queue[skb->priority];
1148 /* Network device handlers */
1149 static const struct net_device_ops mwifiex_netdev_ops = {
1150 .ndo_open = mwifiex_open,
1151 .ndo_stop = mwifiex_close,
1152 .ndo_start_xmit = mwifiex_hard_start_xmit,
1153 .ndo_set_mac_address = mwifiex_set_mac_address,
1154 .ndo_tx_timeout = mwifiex_tx_timeout,
1155 .ndo_get_stats = mwifiex_get_stats,
1156 .ndo_set_rx_mode = mwifiex_set_multicast_list,
1157 .ndo_select_queue = mwifiex_netdev_select_wmm_queue,
1161 * This function initializes the private structure parameters.
1163 * The following wait queues are initialized -
1164 * - IOCTL wait queue
1165 * - Command wait queue
1166 * - Statistics wait queue
1168 * ...and the following default parameters are set -
1169 * - Current key index : Set to 0
1170 * - Rate index : Set to auto
1171 * - Media connected : Set to disconnected
1172 * - Adhoc link sensed : Set to false
1173 * - Nick name : Set to null
1174 * - Number of Tx timeout : Set to 0
1175 * - Device address : Set to current address
1176 * - Rx histogram statistc : Set to 0
1178 * In addition, the CFG80211 work queue is also created.
1180 void mwifiex_init_priv_params(struct mwifiex_private *priv,
1181 struct net_device *dev)
1183 dev->netdev_ops = &mwifiex_netdev_ops;
1184 dev->destructor = free_netdev;
1185 /* Initialize private structure */
1186 priv->current_key_index = 0;
1187 priv->media_connected = false;
1188 memset(priv->mgmt_ie, 0,
1189 sizeof(struct mwifiex_ie) * MAX_MGMT_IE_INDEX);
1190 priv->beacon_idx = MWIFIEX_AUTO_IDX_MASK;
1191 priv->proberesp_idx = MWIFIEX_AUTO_IDX_MASK;
1192 priv->assocresp_idx = MWIFIEX_AUTO_IDX_MASK;
1193 priv->gen_idx = MWIFIEX_AUTO_IDX_MASK;
1194 priv->num_tx_timeout = 0;
1195 ether_addr_copy(priv->curr_addr, priv->adapter->perm_addr);
1196 memcpy(dev->dev_addr, priv->curr_addr, ETH_ALEN);
1198 if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA ||
1199 GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_UAP) {
1200 priv->hist_data = kmalloc(sizeof(*priv->hist_data), GFP_KERNEL);
1201 if (priv->hist_data)
1202 mwifiex_hist_data_reset(priv);
1207 * This function check if command is pending.
1209 int is_command_pending(struct mwifiex_adapter *adapter)
1211 unsigned long flags;
1212 int is_cmd_pend_q_empty;
1214 spin_lock_irqsave(&adapter->cmd_pending_q_lock, flags);
1215 is_cmd_pend_q_empty = list_empty(&adapter->cmd_pending_q);
1216 spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, flags);
1218 return !is_cmd_pend_q_empty;
1222 * This is the RX work queue function.
1224 * It handles the RX operations.
1226 static void mwifiex_rx_work_queue(struct work_struct *work)
1228 struct mwifiex_adapter *adapter =
1229 container_of(work, struct mwifiex_adapter, rx_work);
1231 if (adapter->surprise_removed)
1233 mwifiex_process_rx(adapter);
1237 * This is the main work queue function.
1239 * It handles the main process, which in turn handles the complete
1240 * driver operations.
1242 static void mwifiex_main_work_queue(struct work_struct *work)
1244 struct mwifiex_adapter *adapter =
1245 container_of(work, struct mwifiex_adapter, main_work);
1247 if (adapter->surprise_removed)
1249 mwifiex_main_process(adapter);
1253 * This function adds the card.
1255 * This function follows the following major steps to set up the device -
1256 * - Initialize software. This includes probing the card, registering
1257 * the interface operations table, and allocating/initializing the
1259 * - Set up the netlink socket
1260 * - Create and start the main work queue
1261 * - Register the device
1262 * - Initialize firmware and hardware
1263 * - Add logical interfaces
1266 mwifiex_add_card(void *card, struct semaphore *sem,
1267 struct mwifiex_if_ops *if_ops, u8 iface_type)
1269 struct mwifiex_adapter *adapter;
1271 if (down_interruptible(sem))
1274 if (mwifiex_register(card, if_ops, (void **)&adapter)) {
1275 pr_err("%s: software init failed\n", __func__);
1279 adapter->iface_type = iface_type;
1280 adapter->card_sem = sem;
1282 adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
1283 adapter->surprise_removed = false;
1284 init_waitqueue_head(&adapter->init_wait_q);
1285 adapter->is_suspended = false;
1286 adapter->hs_activated = false;
1287 init_waitqueue_head(&adapter->hs_activate_wait_q);
1288 init_waitqueue_head(&adapter->cmd_wait_q.wait);
1289 adapter->cmd_wait_q.status = 0;
1290 adapter->scan_wait_q_woken = false;
1292 if ((num_possible_cpus() > 1) || adapter->iface_type == MWIFIEX_USB) {
1293 adapter->rx_work_enabled = true;
1294 pr_notice("rx work enabled, cpus %d\n", num_possible_cpus());
1297 adapter->workqueue =
1298 alloc_workqueue("MWIFIEX_WORK_QUEUE",
1299 WQ_HIGHPRI | WQ_MEM_RECLAIM | WQ_UNBOUND, 1);
1300 if (!adapter->workqueue)
1303 INIT_WORK(&adapter->main_work, mwifiex_main_work_queue);
1305 if (adapter->rx_work_enabled) {
1306 adapter->rx_workqueue = alloc_workqueue("MWIFIEX_RX_WORK_QUEUE",
1310 if (!adapter->rx_workqueue)
1313 INIT_WORK(&adapter->rx_work, mwifiex_rx_work_queue);
1316 /* Register the device. Fill up the private data structure with relevant
1317 information from the card. */
1318 if (adapter->if_ops.register_dev(adapter)) {
1319 pr_err("%s: failed to register mwifiex device\n", __func__);
1320 goto err_registerdev;
1323 if (mwifiex_init_hw_fw(adapter)) {
1324 pr_err("%s: firmware init failed\n", __func__);
1331 pr_debug("info: %s: unregister device\n", __func__);
1332 if (adapter->if_ops.unregister_dev)
1333 adapter->if_ops.unregister_dev(adapter);
1334 if (adapter->hw_status == MWIFIEX_HW_STATUS_READY) {
1335 pr_debug("info: %s: shutdown mwifiex\n", __func__);
1336 adapter->init_wait_q_woken = false;
1338 if (mwifiex_shutdown_drv(adapter) == -EINPROGRESS)
1339 wait_event_interruptible(adapter->init_wait_q,
1340 adapter->init_wait_q_woken);
1343 adapter->surprise_removed = true;
1344 mwifiex_terminate_workqueue(adapter);
1346 mwifiex_free_adapter(adapter);
1354 EXPORT_SYMBOL_GPL(mwifiex_add_card);
1357 * This function removes the card.
1359 * This function follows the following major steps to remove the device -
1360 * - Stop data traffic
1361 * - Shutdown firmware
1362 * - Remove the logical interfaces
1363 * - Terminate the work queue
1364 * - Unregister the device
1365 * - Free the adapter structure
1367 int mwifiex_remove_card(struct mwifiex_adapter *adapter, struct semaphore *sem)
1369 struct mwifiex_private *priv = NULL;
1372 if (down_interruptible(sem))
1378 /* We can no longer handle interrupts once we start doing the teardown
1380 if (adapter->if_ops.disable_int)
1381 adapter->if_ops.disable_int(adapter);
1383 adapter->surprise_removed = true;
1385 mwifiex_terminate_workqueue(adapter);
1388 for (i = 0; i < adapter->priv_num; i++) {
1389 priv = adapter->priv[i];
1390 if (priv && priv->netdev) {
1391 mwifiex_stop_net_dev_queue(priv->netdev, adapter);
1392 if (netif_carrier_ok(priv->netdev))
1393 netif_carrier_off(priv->netdev);
1397 mwifiex_dbg(adapter, CMD,
1398 "cmd: calling mwifiex_shutdown_drv...\n");
1399 adapter->init_wait_q_woken = false;
1401 if (mwifiex_shutdown_drv(adapter) == -EINPROGRESS)
1402 wait_event_interruptible(adapter->init_wait_q,
1403 adapter->init_wait_q_woken);
1404 mwifiex_dbg(adapter, CMD,
1405 "cmd: mwifiex_shutdown_drv done\n");
1406 if (atomic_read(&adapter->rx_pending) ||
1407 atomic_read(&adapter->tx_pending) ||
1408 atomic_read(&adapter->cmd_pending)) {
1409 mwifiex_dbg(adapter, ERROR,
1410 "rx_pending=%d, tx_pending=%d,\t"
1412 atomic_read(&adapter->rx_pending),
1413 atomic_read(&adapter->tx_pending),
1414 atomic_read(&adapter->cmd_pending));
1417 for (i = 0; i < adapter->priv_num; i++) {
1418 priv = adapter->priv[i];
1425 priv->wdev.iftype != NL80211_IFTYPE_UNSPECIFIED)
1426 mwifiex_del_virtual_intf(adapter->wiphy, &priv->wdev);
1430 wiphy_unregister(adapter->wiphy);
1431 wiphy_free(adapter->wiphy);
1433 /* Unregister device */
1434 mwifiex_dbg(adapter, INFO,
1435 "info: unregister device\n");
1436 if (adapter->if_ops.unregister_dev)
1437 adapter->if_ops.unregister_dev(adapter);
1438 /* Free adapter structure */
1439 mwifiex_dbg(adapter, INFO,
1440 "info: free adapter\n");
1441 mwifiex_free_adapter(adapter);
1448 EXPORT_SYMBOL_GPL(mwifiex_remove_card);
1450 void _mwifiex_dbg(const struct mwifiex_adapter *adapter, int mask,
1451 const char *fmt, ...)
1453 struct va_format vaf;
1456 if (!adapter->dev || !(adapter->debug_mask & mask))
1459 va_start(args, fmt);
1464 dev_info(adapter->dev, "%pV", &vaf);
1468 EXPORT_SYMBOL_GPL(_mwifiex_dbg);
1471 * This function initializes the module.
1473 * The debug FS is also initialized if configured.
1476 mwifiex_init_module(void)
1478 #ifdef CONFIG_DEBUG_FS
1479 mwifiex_debugfs_init();
1485 * This function cleans up the module.
1487 * The debug FS is removed if available.
1490 mwifiex_cleanup_module(void)
1492 #ifdef CONFIG_DEBUG_FS
1493 mwifiex_debugfs_remove();
1497 module_init(mwifiex_init_module);
1498 module_exit(mwifiex_cleanup_module);
1500 MODULE_AUTHOR("Marvell International Ltd.");
1501 MODULE_DESCRIPTION("Marvell WiFi-Ex Driver version " VERSION);
1502 MODULE_VERSION(VERSION);
1503 MODULE_LICENSE("GPL v2");