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 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;
36 spinlock_t *scan_q_lock = &adapter->scan_pending_q_lock;
39 if (adapter->surprise_removed)
42 if (adapter->scan_delay_cnt == MWIFIEX_MAX_SCAN_DELAY_CNT ||
43 !adapter->scan_processing) {
45 * Abort scan operation by cancelling all pending scan
48 spin_lock_irqsave(scan_q_lock, flags);
49 list_for_each_entry_safe(cmd_node, tmp_node,
50 &adapter->scan_pending_q, list) {
51 list_del(&cmd_node->list);
52 mwifiex_insert_cmd_to_free_q(adapter, cmd_node);
54 spin_unlock_irqrestore(scan_q_lock, flags);
56 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
57 adapter->scan_processing = false;
58 adapter->scan_delay_cnt = 0;
59 adapter->empty_tx_q_cnt = 0;
60 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
62 if (priv->scan_request) {
63 dev_dbg(adapter->dev, "info: aborting scan\n");
64 cfg80211_scan_done(priv->scan_request, 1);
65 priv->scan_request = NULL;
67 priv->scan_aborting = false;
68 dev_dbg(adapter->dev, "info: scan already aborted\n");
73 if (!atomic_read(&priv->adapter->is_tx_received)) {
74 adapter->empty_tx_q_cnt++;
75 if (adapter->empty_tx_q_cnt == MWIFIEX_MAX_EMPTY_TX_Q_CNT) {
77 * No Tx traffic for 200msec. Get scan command from
78 * scan pending queue and put to cmd pending queue to
79 * resume scan operation
81 adapter->scan_delay_cnt = 0;
82 adapter->empty_tx_q_cnt = 0;
83 spin_lock_irqsave(scan_q_lock, flags);
85 if (list_empty(&adapter->scan_pending_q)) {
86 spin_unlock_irqrestore(scan_q_lock, flags);
90 cmd_node = list_first_entry(&adapter->scan_pending_q,
91 struct cmd_ctrl_node, list);
92 list_del(&cmd_node->list);
93 spin_unlock_irqrestore(scan_q_lock, flags);
95 mwifiex_insert_cmd_to_pending_q(adapter, cmd_node,
97 queue_work(adapter->workqueue, &adapter->main_work);
101 adapter->empty_tx_q_cnt = 0;
104 /* Delay scan operation further by 20msec */
105 mod_timer(&priv->scan_delay_timer, jiffies +
106 msecs_to_jiffies(MWIFIEX_SCAN_DELAY_MSEC));
107 adapter->scan_delay_cnt++;
110 if (atomic_read(&priv->adapter->is_tx_received))
111 atomic_set(&priv->adapter->is_tx_received, false);
117 * This function registers the device and performs all the necessary
120 * The following initialization operations are performed -
121 * - Allocate adapter structure
122 * - Save interface specific operations table in adapter
123 * - Call interface specific initialization routine
124 * - Allocate private structures
125 * - Set default adapter structure parameters
128 * In case of any errors during inittialization, this function also ensures
129 * proper cleanup before exiting.
131 static int mwifiex_register(void *card, struct mwifiex_if_ops *if_ops,
134 struct mwifiex_adapter *adapter;
137 adapter = kzalloc(sizeof(struct mwifiex_adapter), GFP_KERNEL);
142 adapter->card = card;
144 /* Save interface specific operations in adapter */
145 memmove(&adapter->if_ops, if_ops, sizeof(struct mwifiex_if_ops));
147 /* card specific initialization has been deferred until now .. */
148 if (adapter->if_ops.init_if)
149 if (adapter->if_ops.init_if(adapter))
152 adapter->priv_num = 0;
154 for (i = 0; i < MWIFIEX_MAX_BSS_NUM; i++) {
155 /* Allocate memory for private structure */
157 kzalloc(sizeof(struct mwifiex_private), GFP_KERNEL);
158 if (!adapter->priv[i])
161 adapter->priv[i]->adapter = adapter;
164 setup_timer(&adapter->priv[i]->scan_delay_timer,
166 (unsigned long)adapter->priv[i]);
168 mwifiex_init_lock_list(adapter);
170 init_timer(&adapter->cmd_timer);
171 adapter->cmd_timer.function = mwifiex_cmd_timeout_func;
172 adapter->cmd_timer.data = (unsigned long) adapter;
177 dev_dbg(adapter->dev, "info: leave mwifiex_register with error\n");
179 for (i = 0; i < adapter->priv_num; i++)
180 kfree(adapter->priv[i]);
188 * This function unregisters the device and performs all the necessary
191 * The following cleanup operations are performed -
193 * - Free beacon buffers
194 * - Free private structures
195 * - Free adapter structure
197 static int mwifiex_unregister(struct mwifiex_adapter *adapter)
201 if (adapter->if_ops.cleanup_if)
202 adapter->if_ops.cleanup_if(adapter);
204 del_timer_sync(&adapter->cmd_timer);
206 /* Free private structures */
207 for (i = 0; i < adapter->priv_num; i++) {
208 if (adapter->priv[i]) {
209 mwifiex_free_curr_bcn(adapter->priv[i]);
210 del_timer_sync(&adapter->priv[i]->scan_delay_timer);
211 kfree(adapter->priv[i]);
222 * This function is the main procedure of the driver and handles various driver
223 * operations. It runs in a loop and provides the core functionalities.
225 * The main responsibilities of this function are -
226 * - Ensure concurrency control
227 * - Handle pending interrupts and call interrupt handlers
228 * - Wake up the card if required
229 * - Handle command responses and call response handlers
230 * - Handle events and call event handlers
231 * - Execute pending commands
232 * - Transmit pending data packets
234 int mwifiex_main_process(struct mwifiex_adapter *adapter)
240 spin_lock_irqsave(&adapter->main_proc_lock, flags);
242 /* Check if already processing */
243 if (adapter->mwifiex_processing) {
244 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
247 adapter->mwifiex_processing = true;
248 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
252 if ((adapter->hw_status == MWIFIEX_HW_STATUS_CLOSING) ||
253 (adapter->hw_status == MWIFIEX_HW_STATUS_NOT_READY))
256 /* Handle pending interrupt if any */
257 if (adapter->int_status) {
258 if (adapter->hs_activated)
259 mwifiex_process_hs_config(adapter);
260 if (adapter->if_ops.process_int_status)
261 adapter->if_ops.process_int_status(adapter);
264 /* Need to wake up the card ? */
265 if ((adapter->ps_state == PS_STATE_SLEEP) &&
266 (adapter->pm_wakeup_card_req &&
267 !adapter->pm_wakeup_fw_try) &&
268 (is_command_pending(adapter) ||
269 !mwifiex_wmm_lists_empty(adapter))) {
270 adapter->pm_wakeup_fw_try = true;
271 adapter->if_ops.wakeup(adapter);
275 if (IS_CARD_RX_RCVD(adapter)) {
276 adapter->pm_wakeup_fw_try = false;
277 if (adapter->ps_state == PS_STATE_SLEEP)
278 adapter->ps_state = PS_STATE_AWAKE;
280 /* We have tried to wakeup the card already */
281 if (adapter->pm_wakeup_fw_try)
283 if (adapter->ps_state != PS_STATE_AWAKE ||
284 adapter->tx_lock_flag)
287 if ((!adapter->scan_chan_gap_enabled &&
288 !adapter->scan_delay_cnt &&
289 adapter->scan_processing) || adapter->data_sent ||
290 mwifiex_wmm_lists_empty(adapter)) {
291 if (adapter->cmd_sent || adapter->curr_cmd ||
292 (!is_command_pending(adapter)))
297 /* Check Rx data for USB */
298 if (adapter->iface_type == MWIFIEX_USB)
299 while ((skb = skb_dequeue(&adapter->usb_rx_data_q)))
300 mwifiex_handle_rx_packet(adapter, skb);
302 /* Check for event */
303 if (adapter->event_received) {
304 adapter->event_received = false;
305 mwifiex_process_event(adapter);
308 /* Check for Cmd Resp */
309 if (adapter->cmd_resp_received) {
310 adapter->cmd_resp_received = false;
311 mwifiex_process_cmdresp(adapter);
313 /* call mwifiex back when init_fw is done */
314 if (adapter->hw_status == MWIFIEX_HW_STATUS_INIT_DONE) {
315 adapter->hw_status = MWIFIEX_HW_STATUS_READY;
316 mwifiex_init_fw_complete(adapter);
320 /* Check if we need to confirm Sleep Request
321 received previously */
322 if (adapter->ps_state == PS_STATE_PRE_SLEEP) {
323 if (!adapter->cmd_sent && !adapter->curr_cmd)
324 mwifiex_check_ps_cond(adapter);
327 /* * The ps_state may have been changed during processing of
328 * Sleep Request event.
330 if ((adapter->ps_state == PS_STATE_SLEEP) ||
331 (adapter->ps_state == PS_STATE_PRE_SLEEP) ||
332 (adapter->ps_state == PS_STATE_SLEEP_CFM) ||
333 adapter->tx_lock_flag)
336 if (!adapter->cmd_sent && !adapter->curr_cmd) {
337 if (mwifiex_exec_next_cmd(adapter) == -1) {
343 if ((adapter->scan_chan_gap_enabled ||
344 (!adapter->scan_processing || adapter->scan_delay_cnt)) &&
345 !adapter->data_sent && !mwifiex_wmm_lists_empty(adapter)) {
346 mwifiex_wmm_process_tx(adapter);
347 if (adapter->hs_activated) {
348 adapter->is_hs_configured = false;
349 mwifiex_hs_activated_event
351 (adapter, MWIFIEX_BSS_ROLE_ANY),
356 if (adapter->delay_null_pkt && !adapter->cmd_sent &&
357 !adapter->curr_cmd && !is_command_pending(adapter) &&
358 mwifiex_wmm_lists_empty(adapter)) {
359 if (!mwifiex_send_null_packet
360 (mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA),
361 MWIFIEX_TxPD_POWER_MGMT_NULL_PACKET |
362 MWIFIEX_TxPD_POWER_MGMT_LAST_PACKET)) {
363 adapter->delay_null_pkt = false;
364 adapter->ps_state = PS_STATE_SLEEP;
370 spin_lock_irqsave(&adapter->main_proc_lock, flags);
371 if ((adapter->int_status) || IS_CARD_RX_RCVD(adapter)) {
372 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
376 adapter->mwifiex_processing = false;
377 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
380 if (adapter->hw_status == MWIFIEX_HW_STATUS_CLOSING)
381 mwifiex_shutdown_drv(adapter);
384 EXPORT_SYMBOL_GPL(mwifiex_main_process);
387 * This function frees the adapter structure.
389 * Additionally, this closes the netlink socket, frees the timers
390 * and private structures.
392 static void mwifiex_free_adapter(struct mwifiex_adapter *adapter)
395 pr_err("%s: adapter is NULL\n", __func__);
399 mwifiex_unregister(adapter);
400 pr_debug("info: %s: free adapter\n", __func__);
404 * This function cancels all works in the queue and destroys
405 * the main workqueue.
407 static void mwifiex_terminate_workqueue(struct mwifiex_adapter *adapter)
409 flush_workqueue(adapter->workqueue);
410 destroy_workqueue(adapter->workqueue);
411 adapter->workqueue = NULL;
415 * This function gets firmware and initializes it.
417 * The main initialization steps followed are -
418 * - Download the correct firmware to card
419 * - Issue the init commands to firmware
421 static void mwifiex_fw_dpc(const struct firmware *firmware, void *context)
425 struct mwifiex_private *priv;
426 struct mwifiex_adapter *adapter = context;
427 struct mwifiex_fw_image fw;
428 struct semaphore *sem = adapter->card_sem;
429 bool init_failed = false;
430 struct wireless_dev *wdev;
433 dev_err(adapter->dev,
434 "Failed to get firmware %s\n", adapter->fw_name);
438 memset(&fw, 0, sizeof(struct mwifiex_fw_image));
439 adapter->firmware = firmware;
440 fw.fw_buf = (u8 *) adapter->firmware->data;
441 fw.fw_len = adapter->firmware->size;
443 if (adapter->if_ops.dnld_fw)
444 ret = adapter->if_ops.dnld_fw(adapter, &fw);
446 ret = mwifiex_dnld_fw(adapter, &fw);
450 dev_notice(adapter->dev, "WLAN FW is active\n");
453 if ((request_firmware(&adapter->cal_data, cal_data_cfg,
455 dev_err(adapter->dev,
456 "Cal data request_firmware() failed\n");
459 /* enable host interrupt after fw dnld is successful */
460 if (adapter->if_ops.enable_int) {
461 if (adapter->if_ops.enable_int(adapter))
465 adapter->init_wait_q_woken = false;
466 ret = mwifiex_init_fw(adapter);
470 adapter->hw_status = MWIFIEX_HW_STATUS_READY;
473 /* Wait for mwifiex_init to complete */
474 wait_event_interruptible(adapter->init_wait_q,
475 adapter->init_wait_q_woken);
476 if (adapter->hw_status != MWIFIEX_HW_STATUS_READY)
479 priv = adapter->priv[MWIFIEX_BSS_ROLE_STA];
480 if (mwifiex_register_cfg80211(adapter)) {
481 dev_err(adapter->dev, "cannot register with cfg80211\n");
486 /* Create station interface by default */
487 wdev = mwifiex_add_virtual_intf(adapter->wiphy, "mlan%d",
488 NL80211_IFTYPE_STATION, NULL, NULL);
490 dev_err(adapter->dev, "cannot create default STA interface\n");
496 mwifiex_drv_get_driver_version(adapter, fmt, sizeof(fmt) - 1);
497 dev_notice(adapter->dev, "driver_version = %s\n", fmt);
501 wiphy_unregister(adapter->wiphy);
502 wiphy_free(adapter->wiphy);
504 if (adapter->if_ops.disable_int)
505 adapter->if_ops.disable_int(adapter);
507 pr_debug("info: %s: unregister device\n", __func__);
508 if (adapter->if_ops.unregister_dev)
509 adapter->if_ops.unregister_dev(adapter);
511 if ((adapter->hw_status == MWIFIEX_HW_STATUS_FW_READY) ||
512 (adapter->hw_status == MWIFIEX_HW_STATUS_READY)) {
513 pr_debug("info: %s: shutdown mwifiex\n", __func__);
514 adapter->init_wait_q_woken = false;
516 if (mwifiex_shutdown_drv(adapter) == -EINPROGRESS)
517 wait_event_interruptible(adapter->init_wait_q,
518 adapter->init_wait_q_woken);
520 adapter->surprise_removed = true;
521 mwifiex_terminate_workqueue(adapter);
524 if (adapter->cal_data) {
525 release_firmware(adapter->cal_data);
526 adapter->cal_data = NULL;
528 if (adapter->firmware) {
529 release_firmware(adapter->firmware);
530 adapter->firmware = NULL;
533 mwifiex_free_adapter(adapter);
539 * This function initializes the hardware and gets firmware.
541 static int mwifiex_init_hw_fw(struct mwifiex_adapter *adapter)
545 ret = request_firmware_nowait(THIS_MODULE, 1, adapter->fw_name,
546 adapter->dev, GFP_KERNEL, adapter,
549 dev_err(adapter->dev,
550 "request_firmware_nowait() returned error %d\n", ret);
555 * CFG802.11 network device handler for open.
557 * Starts the data queue.
560 mwifiex_open(struct net_device *dev)
562 netif_tx_start_all_queues(dev);
567 * CFG802.11 network device handler for close.
570 mwifiex_close(struct net_device *dev)
572 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
574 if (priv->scan_request) {
575 dev_dbg(priv->adapter->dev, "aborting scan on ndo_stop\n");
576 cfg80211_scan_done(priv->scan_request, 1);
577 priv->scan_request = NULL;
578 priv->scan_aborting = true;
585 * Add buffer into wmm tx queue and queue work to transmit it.
587 int mwifiex_queue_tx_pkt(struct mwifiex_private *priv, struct sk_buff *skb)
589 struct netdev_queue *txq;
590 int index = mwifiex_1d_to_wmm_queue[skb->priority];
592 if (atomic_inc_return(&priv->wmm_tx_pending[index]) >= MAX_TX_PENDING) {
593 txq = netdev_get_tx_queue(priv->netdev, index);
594 if (!netif_tx_queue_stopped(txq)) {
595 netif_tx_stop_queue(txq);
596 dev_dbg(priv->adapter->dev, "stop queue: %d\n", index);
600 atomic_inc(&priv->adapter->tx_pending);
601 mwifiex_wmm_add_buf_txqueue(priv, skb);
603 if (priv->adapter->scan_delay_cnt)
604 atomic_set(&priv->adapter->is_tx_received, true);
606 queue_work(priv->adapter->workqueue, &priv->adapter->main_work);
612 * CFG802.11 network device handler for data transmission.
615 mwifiex_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
617 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
618 struct sk_buff *new_skb;
619 struct mwifiex_txinfo *tx_info;
621 dev_dbg(priv->adapter->dev, "data: %lu BSS(%d-%d): Data <= kernel\n",
622 jiffies, priv->bss_type, priv->bss_num);
624 if (priv->adapter->surprise_removed) {
626 priv->stats.tx_dropped++;
629 if (!skb->len || (skb->len > ETH_FRAME_LEN)) {
630 dev_err(priv->adapter->dev, "Tx: bad skb len %d\n", skb->len);
632 priv->stats.tx_dropped++;
635 if (skb_headroom(skb) < MWIFIEX_MIN_DATA_HEADER_LEN) {
636 dev_dbg(priv->adapter->dev,
637 "data: Tx: insufficient skb headroom %d\n",
639 /* Insufficient skb headroom - allocate a new skb */
641 skb_realloc_headroom(skb, MWIFIEX_MIN_DATA_HEADER_LEN);
642 if (unlikely(!new_skb)) {
643 dev_err(priv->adapter->dev, "Tx: cannot alloca new_skb\n");
645 priv->stats.tx_dropped++;
650 dev_dbg(priv->adapter->dev, "info: new skb headroomd %d\n",
654 tx_info = MWIFIEX_SKB_TXCB(skb);
655 memset(tx_info, 0, sizeof(*tx_info));
656 tx_info->bss_num = priv->bss_num;
657 tx_info->bss_type = priv->bss_type;
658 tx_info->pkt_len = skb->len;
660 /* Record the current time the packet was queued; used to
661 * determine the amount of time the packet was queued in
662 * the driver before it was sent to the firmware.
663 * The delay is then sent along with the packet to the
664 * firmware for aggregate delay calculation for stats and
665 * MSDU lifetime expiry.
667 __net_timestamp(skb);
669 mwifiex_queue_tx_pkt(priv, skb);
675 * CFG802.11 network device handler for setting MAC address.
678 mwifiex_set_mac_address(struct net_device *dev, void *addr)
680 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
681 struct sockaddr *hw_addr = addr;
684 memcpy(priv->curr_addr, hw_addr->sa_data, ETH_ALEN);
686 /* Send request to firmware */
687 ret = mwifiex_send_cmd(priv, HostCmd_CMD_802_11_MAC_ADDRESS,
688 HostCmd_ACT_GEN_SET, 0, NULL, true);
691 memcpy(priv->netdev->dev_addr, priv->curr_addr, ETH_ALEN);
693 dev_err(priv->adapter->dev,
694 "set mac address failed: ret=%d\n", ret);
696 memcpy(dev->dev_addr, priv->curr_addr, ETH_ALEN);
702 * CFG802.11 network device handler for setting multicast list.
704 static void mwifiex_set_multicast_list(struct net_device *dev)
706 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
707 struct mwifiex_multicast_list mcast_list;
709 if (dev->flags & IFF_PROMISC) {
710 mcast_list.mode = MWIFIEX_PROMISC_MODE;
711 } else if (dev->flags & IFF_ALLMULTI ||
712 netdev_mc_count(dev) > MWIFIEX_MAX_MULTICAST_LIST_SIZE) {
713 mcast_list.mode = MWIFIEX_ALL_MULTI_MODE;
715 mcast_list.mode = MWIFIEX_MULTICAST_MODE;
716 mcast_list.num_multicast_addr =
717 mwifiex_copy_mcast_addr(&mcast_list, dev);
719 mwifiex_request_set_multicast_list(priv, &mcast_list);
723 * CFG802.11 network device handler for transmission timeout.
726 mwifiex_tx_timeout(struct net_device *dev)
728 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
730 priv->num_tx_timeout++;
731 priv->tx_timeout_cnt++;
732 dev_err(priv->adapter->dev,
733 "%lu : Tx timeout(#%d), bss_type-num = %d-%d\n",
734 jiffies, priv->tx_timeout_cnt, priv->bss_type, priv->bss_num);
735 mwifiex_set_trans_start(dev);
737 if (priv->tx_timeout_cnt > TX_TIMEOUT_THRESHOLD &&
738 priv->adapter->if_ops.card_reset) {
739 dev_err(priv->adapter->dev,
740 "tx_timeout_cnt exceeds threshold. Triggering card reset!\n");
741 priv->adapter->if_ops.card_reset(priv->adapter);
746 * CFG802.11 network device handler for statistics retrieval.
748 static struct net_device_stats *mwifiex_get_stats(struct net_device *dev)
750 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
756 mwifiex_netdev_select_wmm_queue(struct net_device *dev, struct sk_buff *skb,
757 void *accel_priv, select_queue_fallback_t fallback)
759 skb->priority = cfg80211_classify8021d(skb, NULL);
760 return mwifiex_1d_to_wmm_queue[skb->priority];
763 /* Network device handlers */
764 static const struct net_device_ops mwifiex_netdev_ops = {
765 .ndo_open = mwifiex_open,
766 .ndo_stop = mwifiex_close,
767 .ndo_start_xmit = mwifiex_hard_start_xmit,
768 .ndo_set_mac_address = mwifiex_set_mac_address,
769 .ndo_tx_timeout = mwifiex_tx_timeout,
770 .ndo_get_stats = mwifiex_get_stats,
771 .ndo_set_rx_mode = mwifiex_set_multicast_list,
772 .ndo_select_queue = mwifiex_netdev_select_wmm_queue,
776 * This function initializes the private structure parameters.
778 * The following wait queues are initialized -
780 * - Command wait queue
781 * - Statistics wait queue
783 * ...and the following default parameters are set -
784 * - Current key index : Set to 0
785 * - Rate index : Set to auto
786 * - Media connected : Set to disconnected
787 * - Adhoc link sensed : Set to false
788 * - Nick name : Set to null
789 * - Number of Tx timeout : Set to 0
790 * - Device address : Set to current address
792 * In addition, the CFG80211 work queue is also created.
794 void mwifiex_init_priv_params(struct mwifiex_private *priv,
795 struct net_device *dev)
797 dev->netdev_ops = &mwifiex_netdev_ops;
798 dev->destructor = free_netdev;
799 /* Initialize private structure */
800 priv->current_key_index = 0;
801 priv->media_connected = false;
802 memset(&priv->nick_name, 0, sizeof(priv->nick_name));
803 memset(priv->mgmt_ie, 0,
804 sizeof(struct mwifiex_ie) * MAX_MGMT_IE_INDEX);
805 priv->beacon_idx = MWIFIEX_AUTO_IDX_MASK;
806 priv->proberesp_idx = MWIFIEX_AUTO_IDX_MASK;
807 priv->assocresp_idx = MWIFIEX_AUTO_IDX_MASK;
808 priv->rsn_idx = MWIFIEX_AUTO_IDX_MASK;
809 priv->num_tx_timeout = 0;
810 memcpy(dev->dev_addr, priv->curr_addr, ETH_ALEN);
814 * This function check if command is pending.
816 int is_command_pending(struct mwifiex_adapter *adapter)
819 int is_cmd_pend_q_empty;
821 spin_lock_irqsave(&adapter->cmd_pending_q_lock, flags);
822 is_cmd_pend_q_empty = list_empty(&adapter->cmd_pending_q);
823 spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, flags);
825 return !is_cmd_pend_q_empty;
829 * This is the main work queue function.
831 * It handles the main process, which in turn handles the complete
834 static void mwifiex_main_work_queue(struct work_struct *work)
836 struct mwifiex_adapter *adapter =
837 container_of(work, struct mwifiex_adapter, main_work);
839 if (adapter->surprise_removed)
841 mwifiex_main_process(adapter);
845 * This function adds the card.
847 * This function follows the following major steps to set up the device -
848 * - Initialize software. This includes probing the card, registering
849 * the interface operations table, and allocating/initializing the
851 * - Set up the netlink socket
852 * - Create and start the main work queue
853 * - Register the device
854 * - Initialize firmware and hardware
855 * - Add logical interfaces
858 mwifiex_add_card(void *card, struct semaphore *sem,
859 struct mwifiex_if_ops *if_ops, u8 iface_type)
861 struct mwifiex_adapter *adapter;
863 if (down_interruptible(sem))
866 if (mwifiex_register(card, if_ops, (void **)&adapter)) {
867 pr_err("%s: software init failed\n", __func__);
871 adapter->iface_type = iface_type;
872 adapter->card_sem = sem;
874 adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
875 adapter->surprise_removed = false;
876 init_waitqueue_head(&adapter->init_wait_q);
877 adapter->is_suspended = false;
878 adapter->hs_activated = false;
879 init_waitqueue_head(&adapter->hs_activate_wait_q);
880 init_waitqueue_head(&adapter->cmd_wait_q.wait);
881 adapter->cmd_wait_q.status = 0;
882 adapter->scan_wait_q_woken = false;
885 alloc_workqueue("MWIFIEX_WORK_QUEUE",
886 WQ_HIGHPRI | WQ_MEM_RECLAIM | WQ_UNBOUND, 1);
887 if (!adapter->workqueue)
890 INIT_WORK(&adapter->main_work, mwifiex_main_work_queue);
891 if (adapter->if_ops.iface_work)
892 INIT_WORK(&adapter->iface_work, adapter->if_ops.iface_work);
894 /* Register the device. Fill up the private data structure with relevant
895 information from the card. */
896 if (adapter->if_ops.register_dev(adapter)) {
897 pr_err("%s: failed to register mwifiex device\n", __func__);
898 goto err_registerdev;
901 if (mwifiex_init_hw_fw(adapter)) {
902 pr_err("%s: firmware init failed\n", __func__);
909 pr_debug("info: %s: unregister device\n", __func__);
910 if (adapter->if_ops.unregister_dev)
911 adapter->if_ops.unregister_dev(adapter);
912 if ((adapter->hw_status == MWIFIEX_HW_STATUS_FW_READY) ||
913 (adapter->hw_status == MWIFIEX_HW_STATUS_READY)) {
914 pr_debug("info: %s: shutdown mwifiex\n", __func__);
915 adapter->init_wait_q_woken = false;
917 if (mwifiex_shutdown_drv(adapter) == -EINPROGRESS)
918 wait_event_interruptible(adapter->init_wait_q,
919 adapter->init_wait_q_woken);
922 adapter->surprise_removed = true;
923 mwifiex_terminate_workqueue(adapter);
925 mwifiex_free_adapter(adapter);
933 EXPORT_SYMBOL_GPL(mwifiex_add_card);
936 * This function removes the card.
938 * This function follows the following major steps to remove the device -
939 * - Stop data traffic
940 * - Shutdown firmware
941 * - Remove the logical interfaces
942 * - Terminate the work queue
943 * - Unregister the device
944 * - Free the adapter structure
946 int mwifiex_remove_card(struct mwifiex_adapter *adapter, struct semaphore *sem)
948 struct mwifiex_private *priv = NULL;
951 if (down_interruptible(sem))
957 /* We can no longer handle interrupts once we start doing the teardown
959 if (adapter->if_ops.disable_int)
960 adapter->if_ops.disable_int(adapter);
962 adapter->surprise_removed = true;
965 for (i = 0; i < adapter->priv_num; i++) {
966 priv = adapter->priv[i];
967 if (priv && priv->netdev) {
968 mwifiex_stop_net_dev_queue(priv->netdev, adapter);
969 if (netif_carrier_ok(priv->netdev))
970 netif_carrier_off(priv->netdev);
974 dev_dbg(adapter->dev, "cmd: calling mwifiex_shutdown_drv...\n");
975 adapter->init_wait_q_woken = false;
977 if (mwifiex_shutdown_drv(adapter) == -EINPROGRESS)
978 wait_event_interruptible(adapter->init_wait_q,
979 adapter->init_wait_q_woken);
980 dev_dbg(adapter->dev, "cmd: mwifiex_shutdown_drv done\n");
981 if (atomic_read(&adapter->rx_pending) ||
982 atomic_read(&adapter->tx_pending) ||
983 atomic_read(&adapter->cmd_pending)) {
984 dev_err(adapter->dev, "rx_pending=%d, tx_pending=%d, "
986 atomic_read(&adapter->rx_pending),
987 atomic_read(&adapter->tx_pending),
988 atomic_read(&adapter->cmd_pending));
991 for (i = 0; i < adapter->priv_num; i++) {
992 priv = adapter->priv[i];
998 if (priv->wdev && priv->netdev)
999 mwifiex_del_virtual_intf(adapter->wiphy, priv->wdev);
1003 wiphy_unregister(adapter->wiphy);
1004 wiphy_free(adapter->wiphy);
1006 mwifiex_terminate_workqueue(adapter);
1008 /* Unregister device */
1009 dev_dbg(adapter->dev, "info: unregister device\n");
1010 if (adapter->if_ops.unregister_dev)
1011 adapter->if_ops.unregister_dev(adapter);
1012 /* Free adapter structure */
1013 dev_dbg(adapter->dev, "info: free adapter\n");
1014 mwifiex_free_adapter(adapter);
1021 EXPORT_SYMBOL_GPL(mwifiex_remove_card);
1024 * This function initializes the module.
1026 * The debug FS is also initialized if configured.
1029 mwifiex_init_module(void)
1031 #ifdef CONFIG_DEBUG_FS
1032 mwifiex_debugfs_init();
1038 * This function cleans up the module.
1040 * The debug FS is removed if available.
1043 mwifiex_cleanup_module(void)
1045 #ifdef CONFIG_DEBUG_FS
1046 mwifiex_debugfs_remove();
1050 module_init(mwifiex_init_module);
1051 module_exit(mwifiex_cleanup_module);
1053 MODULE_AUTHOR("Marvell International Ltd.");
1054 MODULE_DESCRIPTION("Marvell WiFi-Ex Driver version " VERSION);
1055 MODULE_VERSION(VERSION);
1056 MODULE_LICENSE("GPL v2");