2 * Marvell Wireless LAN device driver: major functions
4 * Copyright (C) 2011, 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 const char driver_version[] = "mwifiex " VERSION " (%s) ";
28 static char *cal_data_cfg;
29 module_param(cal_data_cfg, charp, 0);
31 static void scan_delay_timer_fn(unsigned long data)
33 struct mwifiex_private *priv = (struct mwifiex_private *)data;
34 struct mwifiex_adapter *adapter = priv->adapter;
35 struct cmd_ctrl_node *cmd_node, *tmp_node;
38 if (adapter->surprise_removed)
41 if (adapter->scan_delay_cnt == MWIFIEX_MAX_SCAN_DELAY_CNT) {
43 * Abort scan operation by cancelling all pending scan
46 spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
47 list_for_each_entry_safe(cmd_node, tmp_node,
48 &adapter->scan_pending_q, list) {
49 list_del(&cmd_node->list);
50 mwifiex_insert_cmd_to_free_q(adapter, cmd_node);
52 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
54 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
55 adapter->scan_processing = false;
56 adapter->scan_delay_cnt = 0;
57 adapter->empty_tx_q_cnt = 0;
58 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
60 if (priv->scan_request) {
61 dev_dbg(adapter->dev, "info: aborting scan\n");
62 cfg80211_scan_done(priv->scan_request, 1);
63 priv->scan_request = NULL;
65 priv->scan_aborting = false;
66 dev_dbg(adapter->dev, "info: scan already aborted\n");
71 if (!atomic_read(&priv->adapter->is_tx_received)) {
72 adapter->empty_tx_q_cnt++;
73 if (adapter->empty_tx_q_cnt == MWIFIEX_MAX_EMPTY_TX_Q_CNT) {
75 * No Tx traffic for 200msec. Get scan command from
76 * scan pending queue and put to cmd pending queue to
77 * resume scan operation
79 adapter->scan_delay_cnt = 0;
80 adapter->empty_tx_q_cnt = 0;
81 spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
82 cmd_node = list_first_entry(&adapter->scan_pending_q,
83 struct cmd_ctrl_node, list);
84 list_del(&cmd_node->list);
85 spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
88 mwifiex_insert_cmd_to_pending_q(adapter, cmd_node,
90 queue_work(adapter->workqueue, &adapter->main_work);
94 adapter->empty_tx_q_cnt = 0;
97 /* Delay scan operation further by 20msec */
98 mod_timer(&priv->scan_delay_timer, jiffies +
99 msecs_to_jiffies(MWIFIEX_SCAN_DELAY_MSEC));
100 adapter->scan_delay_cnt++;
103 if (atomic_read(&priv->adapter->is_tx_received))
104 atomic_set(&priv->adapter->is_tx_received, false);
110 * This function registers the device and performs all the necessary
113 * The following initialization operations are performed -
114 * - Allocate adapter structure
115 * - Save interface specific operations table in adapter
116 * - Call interface specific initialization routine
117 * - Allocate private structures
118 * - Set default adapter structure parameters
121 * In case of any errors during inittialization, this function also ensures
122 * proper cleanup before exiting.
124 static int mwifiex_register(void *card, struct mwifiex_if_ops *if_ops,
127 struct mwifiex_adapter *adapter;
130 adapter = kzalloc(sizeof(struct mwifiex_adapter), GFP_KERNEL);
135 adapter->card = card;
137 /* Save interface specific operations in adapter */
138 memmove(&adapter->if_ops, if_ops, sizeof(struct mwifiex_if_ops));
140 /* card specific initialization has been deferred until now .. */
141 if (adapter->if_ops.init_if)
142 if (adapter->if_ops.init_if(adapter))
145 adapter->priv_num = 0;
147 for (i = 0; i < MWIFIEX_MAX_BSS_NUM; i++) {
148 /* Allocate memory for private structure */
150 kzalloc(sizeof(struct mwifiex_private), GFP_KERNEL);
151 if (!adapter->priv[i])
154 adapter->priv[i]->adapter = adapter;
157 setup_timer(&adapter->priv[i]->scan_delay_timer,
159 (unsigned long)adapter->priv[i]);
161 mwifiex_init_lock_list(adapter);
163 init_timer(&adapter->cmd_timer);
164 adapter->cmd_timer.function = mwifiex_cmd_timeout_func;
165 adapter->cmd_timer.data = (unsigned long) adapter;
170 dev_dbg(adapter->dev, "info: leave mwifiex_register with error\n");
172 for (i = 0; i < adapter->priv_num; i++)
173 kfree(adapter->priv[i]);
181 * This function unregisters the device and performs all the necessary
184 * The following cleanup operations are performed -
186 * - Free beacon buffers
187 * - Free private structures
188 * - Free adapter structure
190 static int mwifiex_unregister(struct mwifiex_adapter *adapter)
194 if (adapter->if_ops.cleanup_if)
195 adapter->if_ops.cleanup_if(adapter);
197 del_timer(&adapter->cmd_timer);
199 /* Free private structures */
200 for (i = 0; i < adapter->priv_num; i++) {
201 if (adapter->priv[i]) {
202 mwifiex_free_curr_bcn(adapter->priv[i]);
203 del_timer_sync(&adapter->priv[i]->scan_delay_timer);
204 kfree(adapter->priv[i]);
215 * This function is the main procedure of the driver and handles various driver
216 * operations. It runs in a loop and provides the core functionalities.
218 * The main responsibilities of this function are -
219 * - Ensure concurrency control
220 * - Handle pending interrupts and call interrupt handlers
221 * - Wake up the card if required
222 * - Handle command responses and call response handlers
223 * - Handle events and call event handlers
224 * - Execute pending commands
225 * - Transmit pending data packets
227 int mwifiex_main_process(struct mwifiex_adapter *adapter)
233 spin_lock_irqsave(&adapter->main_proc_lock, flags);
235 /* Check if already processing */
236 if (adapter->mwifiex_processing) {
237 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
240 adapter->mwifiex_processing = true;
241 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
245 if ((adapter->hw_status == MWIFIEX_HW_STATUS_CLOSING) ||
246 (adapter->hw_status == MWIFIEX_HW_STATUS_NOT_READY))
249 /* Handle pending interrupt if any */
250 if (adapter->int_status) {
251 if (adapter->hs_activated)
252 mwifiex_process_hs_config(adapter);
253 if (adapter->if_ops.process_int_status)
254 adapter->if_ops.process_int_status(adapter);
257 /* Need to wake up the card ? */
258 if ((adapter->ps_state == PS_STATE_SLEEP) &&
259 (adapter->pm_wakeup_card_req &&
260 !adapter->pm_wakeup_fw_try) &&
261 (is_command_pending(adapter) ||
262 !mwifiex_wmm_lists_empty(adapter))) {
263 adapter->pm_wakeup_fw_try = true;
264 adapter->if_ops.wakeup(adapter);
268 if (IS_CARD_RX_RCVD(adapter)) {
269 adapter->pm_wakeup_fw_try = false;
270 if (adapter->ps_state == PS_STATE_SLEEP)
271 adapter->ps_state = PS_STATE_AWAKE;
273 /* We have tried to wakeup the card already */
274 if (adapter->pm_wakeup_fw_try)
276 if (adapter->ps_state != PS_STATE_AWAKE ||
277 adapter->tx_lock_flag)
280 if ((adapter->scan_processing &&
281 !adapter->scan_delay_cnt) || adapter->data_sent ||
282 mwifiex_wmm_lists_empty(adapter)) {
283 if (adapter->cmd_sent || adapter->curr_cmd ||
284 (!is_command_pending(adapter)))
289 /* Check Rx data for USB */
290 if (adapter->iface_type == MWIFIEX_USB)
291 while ((skb = skb_dequeue(&adapter->usb_rx_data_q)))
292 mwifiex_handle_rx_packet(adapter, skb);
294 /* Check for Cmd Resp */
295 if (adapter->cmd_resp_received) {
296 adapter->cmd_resp_received = false;
297 mwifiex_process_cmdresp(adapter);
299 /* call mwifiex back when init_fw is done */
300 if (adapter->hw_status == MWIFIEX_HW_STATUS_INIT_DONE) {
301 adapter->hw_status = MWIFIEX_HW_STATUS_READY;
302 mwifiex_init_fw_complete(adapter);
306 /* Check for event */
307 if (adapter->event_received) {
308 adapter->event_received = false;
309 mwifiex_process_event(adapter);
312 /* Check if we need to confirm Sleep Request
313 received previously */
314 if (adapter->ps_state == PS_STATE_PRE_SLEEP) {
315 if (!adapter->cmd_sent && !adapter->curr_cmd)
316 mwifiex_check_ps_cond(adapter);
319 /* * The ps_state may have been changed during processing of
320 * Sleep Request event.
322 if ((adapter->ps_state == PS_STATE_SLEEP) ||
323 (adapter->ps_state == PS_STATE_PRE_SLEEP) ||
324 (adapter->ps_state == PS_STATE_SLEEP_CFM) ||
325 adapter->tx_lock_flag)
328 if (!adapter->cmd_sent && !adapter->curr_cmd) {
329 if (mwifiex_exec_next_cmd(adapter) == -1) {
335 if ((!adapter->scan_processing || adapter->scan_delay_cnt) &&
336 !adapter->data_sent && !mwifiex_wmm_lists_empty(adapter)) {
337 mwifiex_wmm_process_tx(adapter);
338 if (adapter->hs_activated) {
339 adapter->is_hs_configured = false;
340 mwifiex_hs_activated_event
342 (adapter, MWIFIEX_BSS_ROLE_ANY),
347 if (adapter->delay_null_pkt && !adapter->cmd_sent &&
348 !adapter->curr_cmd && !is_command_pending(adapter) &&
349 mwifiex_wmm_lists_empty(adapter)) {
350 if (!mwifiex_send_null_packet
351 (mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA),
352 MWIFIEX_TxPD_POWER_MGMT_NULL_PACKET |
353 MWIFIEX_TxPD_POWER_MGMT_LAST_PACKET)) {
354 adapter->delay_null_pkt = false;
355 adapter->ps_state = PS_STATE_SLEEP;
361 spin_lock_irqsave(&adapter->main_proc_lock, flags);
362 if ((adapter->int_status) || IS_CARD_RX_RCVD(adapter)) {
363 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
367 adapter->mwifiex_processing = false;
368 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
371 if (adapter->hw_status == MWIFIEX_HW_STATUS_CLOSING)
372 mwifiex_shutdown_drv(adapter);
375 EXPORT_SYMBOL_GPL(mwifiex_main_process);
378 * This function frees the adapter structure.
380 * Additionally, this closes the netlink socket, frees the timers
381 * and private structures.
383 static void mwifiex_free_adapter(struct mwifiex_adapter *adapter)
386 pr_err("%s: adapter is NULL\n", __func__);
390 mwifiex_unregister(adapter);
391 pr_debug("info: %s: free adapter\n", __func__);
395 * This function cancels all works in the queue and destroys
396 * the main workqueue.
398 static void mwifiex_terminate_workqueue(struct mwifiex_adapter *adapter)
400 flush_workqueue(adapter->workqueue);
401 destroy_workqueue(adapter->workqueue);
402 adapter->workqueue = NULL;
406 * This function gets firmware and initializes it.
408 * The main initialization steps followed are -
409 * - Download the correct firmware to card
410 * - Issue the init commands to firmware
412 static void mwifiex_fw_dpc(const struct firmware *firmware, void *context)
416 struct mwifiex_private *priv;
417 struct mwifiex_adapter *adapter = context;
418 struct mwifiex_fw_image fw;
419 struct semaphore *sem = adapter->card_sem;
420 bool init_failed = false;
421 struct wireless_dev *wdev;
424 dev_err(adapter->dev,
425 "Failed to get firmware %s\n", adapter->fw_name);
429 memset(&fw, 0, sizeof(struct mwifiex_fw_image));
430 adapter->firmware = firmware;
431 fw.fw_buf = (u8 *) adapter->firmware->data;
432 fw.fw_len = adapter->firmware->size;
434 if (adapter->if_ops.dnld_fw)
435 ret = adapter->if_ops.dnld_fw(adapter, &fw);
437 ret = mwifiex_dnld_fw(adapter, &fw);
441 dev_notice(adapter->dev, "WLAN FW is active\n");
444 if ((request_firmware(&adapter->cal_data, cal_data_cfg,
446 dev_err(adapter->dev,
447 "Cal data request_firmware() failed\n");
450 /* enable host interrupt after fw dnld is successful */
451 if (adapter->if_ops.enable_int) {
452 if (adapter->if_ops.enable_int(adapter))
456 adapter->init_wait_q_woken = false;
457 ret = mwifiex_init_fw(adapter);
461 adapter->hw_status = MWIFIEX_HW_STATUS_READY;
464 /* Wait for mwifiex_init to complete */
465 wait_event_interruptible(adapter->init_wait_q,
466 adapter->init_wait_q_woken);
467 if (adapter->hw_status != MWIFIEX_HW_STATUS_READY)
470 priv = adapter->priv[MWIFIEX_BSS_ROLE_STA];
471 if (mwifiex_register_cfg80211(adapter)) {
472 dev_err(adapter->dev, "cannot register with cfg80211\n");
477 /* Create station interface by default */
478 wdev = mwifiex_add_virtual_intf(adapter->wiphy, "mlan%d",
479 NL80211_IFTYPE_STATION, NULL, NULL);
481 dev_err(adapter->dev, "cannot create default STA interface\n");
487 mwifiex_drv_get_driver_version(adapter, fmt, sizeof(fmt) - 1);
488 dev_notice(adapter->dev, "driver_version = %s\n", fmt);
492 wiphy_unregister(adapter->wiphy);
493 wiphy_free(adapter->wiphy);
495 if (adapter->if_ops.disable_int)
496 adapter->if_ops.disable_int(adapter);
498 pr_debug("info: %s: unregister device\n", __func__);
499 if (adapter->if_ops.unregister_dev)
500 adapter->if_ops.unregister_dev(adapter);
502 if ((adapter->hw_status == MWIFIEX_HW_STATUS_FW_READY) ||
503 (adapter->hw_status == MWIFIEX_HW_STATUS_READY)) {
504 pr_debug("info: %s: shutdown mwifiex\n", __func__);
505 adapter->init_wait_q_woken = false;
507 if (mwifiex_shutdown_drv(adapter) == -EINPROGRESS)
508 wait_event_interruptible(adapter->init_wait_q,
509 adapter->init_wait_q_woken);
511 adapter->surprise_removed = true;
512 mwifiex_terminate_workqueue(adapter);
515 if (adapter->cal_data) {
516 release_firmware(adapter->cal_data);
517 adapter->cal_data = NULL;
519 if (adapter->firmware) {
520 release_firmware(adapter->firmware);
521 adapter->firmware = NULL;
523 complete(&adapter->fw_load);
525 mwifiex_free_adapter(adapter);
531 * This function initializes the hardware and gets firmware.
533 static int mwifiex_init_hw_fw(struct mwifiex_adapter *adapter)
537 init_completion(&adapter->fw_load);
538 ret = request_firmware_nowait(THIS_MODULE, 1, adapter->fw_name,
539 adapter->dev, GFP_KERNEL, adapter,
542 dev_err(adapter->dev,
543 "request_firmware_nowait() returned error %d\n", ret);
548 * CFG802.11 network device handler for open.
550 * Starts the data queue.
553 mwifiex_open(struct net_device *dev)
555 netif_tx_start_all_queues(dev);
560 * CFG802.11 network device handler for close.
563 mwifiex_close(struct net_device *dev)
565 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
567 if (priv->scan_request) {
568 dev_dbg(priv->adapter->dev, "aborting scan on ndo_stop\n");
569 cfg80211_scan_done(priv->scan_request, 1);
570 priv->scan_request = NULL;
571 priv->scan_aborting = true;
578 * Add buffer into wmm tx queue and queue work to transmit it.
580 int mwifiex_queue_tx_pkt(struct mwifiex_private *priv, struct sk_buff *skb)
582 struct netdev_queue *txq;
583 int index = mwifiex_1d_to_wmm_queue[skb->priority];
585 if (atomic_inc_return(&priv->wmm_tx_pending[index]) >= MAX_TX_PENDING) {
586 txq = netdev_get_tx_queue(priv->netdev, index);
587 if (!netif_tx_queue_stopped(txq)) {
588 netif_tx_stop_queue(txq);
589 dev_dbg(priv->adapter->dev, "stop queue: %d\n", index);
593 atomic_inc(&priv->adapter->tx_pending);
594 mwifiex_wmm_add_buf_txqueue(priv, skb);
596 if (priv->adapter->scan_delay_cnt)
597 atomic_set(&priv->adapter->is_tx_received, true);
599 queue_work(priv->adapter->workqueue, &priv->adapter->main_work);
605 * CFG802.11 network device handler for data transmission.
608 mwifiex_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
610 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
611 struct sk_buff *new_skb;
612 struct mwifiex_txinfo *tx_info;
615 dev_dbg(priv->adapter->dev, "data: %lu BSS(%d-%d): Data <= kernel\n",
616 jiffies, priv->bss_type, priv->bss_num);
618 if (priv->adapter->surprise_removed) {
620 priv->stats.tx_dropped++;
623 if (!skb->len || (skb->len > ETH_FRAME_LEN)) {
624 dev_err(priv->adapter->dev, "Tx: bad skb len %d\n", skb->len);
626 priv->stats.tx_dropped++;
629 if (skb_headroom(skb) < MWIFIEX_MIN_DATA_HEADER_LEN) {
630 dev_dbg(priv->adapter->dev,
631 "data: Tx: insufficient skb headroom %d\n",
633 /* Insufficient skb headroom - allocate a new skb */
635 skb_realloc_headroom(skb, MWIFIEX_MIN_DATA_HEADER_LEN);
636 if (unlikely(!new_skb)) {
637 dev_err(priv->adapter->dev, "Tx: cannot alloca new_skb\n");
639 priv->stats.tx_dropped++;
644 dev_dbg(priv->adapter->dev, "info: new skb headroomd %d\n",
648 tx_info = MWIFIEX_SKB_TXCB(skb);
649 tx_info->bss_num = priv->bss_num;
650 tx_info->bss_type = priv->bss_type;
652 /* Record the current time the packet was queued; used to
653 * determine the amount of time the packet was queued in
654 * the driver before it was sent to the firmware.
655 * The delay is then sent along with the packet to the
656 * firmware for aggregate delay calculation for stats and
657 * MSDU lifetime expiry.
659 do_gettimeofday(&tv);
660 skb->tstamp = timeval_to_ktime(tv);
662 mwifiex_queue_tx_pkt(priv, skb);
668 * CFG802.11 network device handler for setting MAC address.
671 mwifiex_set_mac_address(struct net_device *dev, void *addr)
673 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
674 struct sockaddr *hw_addr = addr;
677 memcpy(priv->curr_addr, hw_addr->sa_data, ETH_ALEN);
679 /* Send request to firmware */
680 ret = mwifiex_send_cmd_sync(priv, HostCmd_CMD_802_11_MAC_ADDRESS,
681 HostCmd_ACT_GEN_SET, 0, NULL);
684 memcpy(priv->netdev->dev_addr, priv->curr_addr, ETH_ALEN);
686 dev_err(priv->adapter->dev,
687 "set mac address failed: ret=%d\n", ret);
689 memcpy(dev->dev_addr, priv->curr_addr, ETH_ALEN);
695 * CFG802.11 network device handler for setting multicast list.
697 static void mwifiex_set_multicast_list(struct net_device *dev)
699 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
700 struct mwifiex_multicast_list mcast_list;
702 if (dev->flags & IFF_PROMISC) {
703 mcast_list.mode = MWIFIEX_PROMISC_MODE;
704 } else if (dev->flags & IFF_ALLMULTI ||
705 netdev_mc_count(dev) > MWIFIEX_MAX_MULTICAST_LIST_SIZE) {
706 mcast_list.mode = MWIFIEX_ALL_MULTI_MODE;
708 mcast_list.mode = MWIFIEX_MULTICAST_MODE;
709 mcast_list.num_multicast_addr =
710 mwifiex_copy_mcast_addr(&mcast_list, dev);
712 mwifiex_request_set_multicast_list(priv, &mcast_list);
716 * CFG802.11 network device handler for transmission timeout.
719 mwifiex_tx_timeout(struct net_device *dev)
721 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
723 priv->num_tx_timeout++;
724 priv->tx_timeout_cnt++;
725 dev_err(priv->adapter->dev,
726 "%lu : Tx timeout(#%d), bss_type-num = %d-%d\n",
727 jiffies, priv->tx_timeout_cnt, priv->bss_type, priv->bss_num);
728 mwifiex_set_trans_start(dev);
730 if (priv->tx_timeout_cnt > TX_TIMEOUT_THRESHOLD &&
731 priv->adapter->if_ops.card_reset) {
732 dev_err(priv->adapter->dev,
733 "tx_timeout_cnt exceeds threshold. Triggering card reset!\n");
734 priv->adapter->if_ops.card_reset(priv->adapter);
739 * CFG802.11 network device handler for statistics retrieval.
741 static struct net_device_stats *mwifiex_get_stats(struct net_device *dev)
743 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
749 mwifiex_netdev_select_wmm_queue(struct net_device *dev, struct sk_buff *skb)
751 skb->priority = cfg80211_classify8021d(skb);
752 return mwifiex_1d_to_wmm_queue[skb->priority];
755 /* Network device handlers */
756 static const struct net_device_ops mwifiex_netdev_ops = {
757 .ndo_open = mwifiex_open,
758 .ndo_stop = mwifiex_close,
759 .ndo_start_xmit = mwifiex_hard_start_xmit,
760 .ndo_set_mac_address = mwifiex_set_mac_address,
761 .ndo_tx_timeout = mwifiex_tx_timeout,
762 .ndo_get_stats = mwifiex_get_stats,
763 .ndo_set_rx_mode = mwifiex_set_multicast_list,
764 .ndo_select_queue = mwifiex_netdev_select_wmm_queue,
768 * This function initializes the private structure parameters.
770 * The following wait queues are initialized -
772 * - Command wait queue
773 * - Statistics wait queue
775 * ...and the following default parameters are set -
776 * - Current key index : Set to 0
777 * - Rate index : Set to auto
778 * - Media connected : Set to disconnected
779 * - Adhoc link sensed : Set to false
780 * - Nick name : Set to null
781 * - Number of Tx timeout : Set to 0
782 * - Device address : Set to current address
784 * In addition, the CFG80211 work queue is also created.
786 void mwifiex_init_priv_params(struct mwifiex_private *priv,
787 struct net_device *dev)
789 dev->netdev_ops = &mwifiex_netdev_ops;
790 dev->destructor = free_netdev;
791 /* Initialize private structure */
792 priv->current_key_index = 0;
793 priv->media_connected = false;
794 memset(&priv->nick_name, 0, sizeof(priv->nick_name));
795 memset(priv->mgmt_ie, 0,
796 sizeof(struct mwifiex_ie) * MAX_MGMT_IE_INDEX);
797 priv->beacon_idx = MWIFIEX_AUTO_IDX_MASK;
798 priv->proberesp_idx = MWIFIEX_AUTO_IDX_MASK;
799 priv->assocresp_idx = MWIFIEX_AUTO_IDX_MASK;
800 priv->rsn_idx = MWIFIEX_AUTO_IDX_MASK;
801 priv->num_tx_timeout = 0;
802 memcpy(dev->dev_addr, priv->curr_addr, ETH_ALEN);
806 * This function check if command is pending.
808 int is_command_pending(struct mwifiex_adapter *adapter)
811 int is_cmd_pend_q_empty;
813 spin_lock_irqsave(&adapter->cmd_pending_q_lock, flags);
814 is_cmd_pend_q_empty = list_empty(&adapter->cmd_pending_q);
815 spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, flags);
817 return !is_cmd_pend_q_empty;
821 * This is the main work queue function.
823 * It handles the main process, which in turn handles the complete
826 static void mwifiex_main_work_queue(struct work_struct *work)
828 struct mwifiex_adapter *adapter =
829 container_of(work, struct mwifiex_adapter, main_work);
831 if (adapter->surprise_removed)
833 mwifiex_main_process(adapter);
837 * This function adds the card.
839 * This function follows the following major steps to set up the device -
840 * - Initialize software. This includes probing the card, registering
841 * the interface operations table, and allocating/initializing the
843 * - Set up the netlink socket
844 * - Create and start the main work queue
845 * - Register the device
846 * - Initialize firmware and hardware
847 * - Add logical interfaces
850 mwifiex_add_card(void *card, struct semaphore *sem,
851 struct mwifiex_if_ops *if_ops, u8 iface_type)
853 struct mwifiex_adapter *adapter;
855 if (down_interruptible(sem))
858 if (mwifiex_register(card, if_ops, (void **)&adapter)) {
859 pr_err("%s: software init failed\n", __func__);
863 adapter->iface_type = iface_type;
864 adapter->card_sem = sem;
866 adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
867 adapter->surprise_removed = false;
868 init_waitqueue_head(&adapter->init_wait_q);
869 adapter->is_suspended = false;
870 adapter->hs_activated = false;
871 init_waitqueue_head(&adapter->hs_activate_wait_q);
872 adapter->cmd_wait_q_required = false;
873 init_waitqueue_head(&adapter->cmd_wait_q.wait);
874 adapter->cmd_wait_q.status = 0;
875 adapter->scan_wait_q_woken = false;
878 alloc_workqueue("MWIFIEX_WORK_QUEUE",
879 WQ_HIGHPRI | WQ_MEM_RECLAIM | WQ_UNBOUND, 1);
880 if (!adapter->workqueue)
883 INIT_WORK(&adapter->main_work, mwifiex_main_work_queue);
885 /* Register the device. Fill up the private data structure with relevant
886 information from the card. */
887 if (adapter->if_ops.register_dev(adapter)) {
888 pr_err("%s: failed to register mwifiex device\n", __func__);
889 goto err_registerdev;
892 if (mwifiex_init_hw_fw(adapter)) {
893 pr_err("%s: firmware init failed\n", __func__);
900 pr_debug("info: %s: unregister device\n", __func__);
901 if (adapter->if_ops.unregister_dev)
902 adapter->if_ops.unregister_dev(adapter);
903 if ((adapter->hw_status == MWIFIEX_HW_STATUS_FW_READY) ||
904 (adapter->hw_status == MWIFIEX_HW_STATUS_READY)) {
905 pr_debug("info: %s: shutdown mwifiex\n", __func__);
906 adapter->init_wait_q_woken = false;
908 if (mwifiex_shutdown_drv(adapter) == -EINPROGRESS)
909 wait_event_interruptible(adapter->init_wait_q,
910 adapter->init_wait_q_woken);
913 adapter->surprise_removed = true;
914 mwifiex_terminate_workqueue(adapter);
916 mwifiex_free_adapter(adapter);
924 EXPORT_SYMBOL_GPL(mwifiex_add_card);
927 * This function removes the card.
929 * This function follows the following major steps to remove the device -
930 * - Stop data traffic
931 * - Shutdown firmware
932 * - Remove the logical interfaces
933 * - Terminate the work queue
934 * - Unregister the device
935 * - Free the adapter structure
937 int mwifiex_remove_card(struct mwifiex_adapter *adapter, struct semaphore *sem)
939 struct mwifiex_private *priv = NULL;
942 if (down_interruptible(sem))
948 /* We can no longer handle interrupts once we start doing the teardown
950 if (adapter->if_ops.disable_int)
951 adapter->if_ops.disable_int(adapter);
953 adapter->surprise_removed = true;
956 for (i = 0; i < adapter->priv_num; i++) {
957 priv = adapter->priv[i];
958 if (priv && priv->netdev) {
959 mwifiex_stop_net_dev_queue(priv->netdev, adapter);
960 if (netif_carrier_ok(priv->netdev))
961 netif_carrier_off(priv->netdev);
965 dev_dbg(adapter->dev, "cmd: calling mwifiex_shutdown_drv...\n");
966 adapter->init_wait_q_woken = false;
968 if (mwifiex_shutdown_drv(adapter) == -EINPROGRESS)
969 wait_event_interruptible(adapter->init_wait_q,
970 adapter->init_wait_q_woken);
971 dev_dbg(adapter->dev, "cmd: mwifiex_shutdown_drv done\n");
972 if (atomic_read(&adapter->rx_pending) ||
973 atomic_read(&adapter->tx_pending) ||
974 atomic_read(&adapter->cmd_pending)) {
975 dev_err(adapter->dev, "rx_pending=%d, tx_pending=%d, "
977 atomic_read(&adapter->rx_pending),
978 atomic_read(&adapter->tx_pending),
979 atomic_read(&adapter->cmd_pending));
982 for (i = 0; i < adapter->priv_num; i++) {
983 priv = adapter->priv[i];
989 if (priv->wdev && priv->netdev)
990 mwifiex_del_virtual_intf(adapter->wiphy, priv->wdev);
994 priv = adapter->priv[0];
995 if (!priv || !priv->wdev)
998 wiphy_unregister(priv->wdev->wiphy);
999 wiphy_free(priv->wdev->wiphy);
1001 mwifiex_terminate_workqueue(adapter);
1003 /* Unregister device */
1004 dev_dbg(adapter->dev, "info: unregister device\n");
1005 if (adapter->if_ops.unregister_dev)
1006 adapter->if_ops.unregister_dev(adapter);
1007 /* Free adapter structure */
1008 dev_dbg(adapter->dev, "info: free adapter\n");
1009 mwifiex_free_adapter(adapter);
1016 EXPORT_SYMBOL_GPL(mwifiex_remove_card);
1019 * This function initializes the module.
1021 * The debug FS is also initialized if configured.
1024 mwifiex_init_module(void)
1026 #ifdef CONFIG_DEBUG_FS
1027 mwifiex_debugfs_init();
1033 * This function cleans up the module.
1035 * The debug FS is removed if available.
1038 mwifiex_cleanup_module(void)
1040 #ifdef CONFIG_DEBUG_FS
1041 mwifiex_debugfs_remove();
1045 module_init(mwifiex_init_module);
1046 module_exit(mwifiex_cleanup_module);
1048 MODULE_AUTHOR("Marvell International Ltd.");
1049 MODULE_DESCRIPTION("Marvell WiFi-Ex Driver version " VERSION);
1050 MODULE_VERSION(VERSION);
1051 MODULE_LICENSE("GPL v2");