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 unsigned short driver_mode;
32 module_param(driver_mode, ushort, 0);
33 MODULE_PARM_DESC(driver_mode,
34 "station=0x1(default), ap-sta=0x3, station-p2p=0x5, ap-sta-p2p=0x7");
37 * This function registers the device and performs all the necessary
40 * The following initialization operations are performed -
41 * - Allocate adapter structure
42 * - Save interface specific operations table in adapter
43 * - Call interface specific initialization routine
44 * - Allocate private structures
45 * - Set default adapter structure parameters
48 * In case of any errors during inittialization, this function also ensures
49 * proper cleanup before exiting.
51 static int mwifiex_register(void *card, struct mwifiex_if_ops *if_ops,
54 struct mwifiex_adapter *adapter;
57 adapter = kzalloc(sizeof(struct mwifiex_adapter), GFP_KERNEL);
64 /* Save interface specific operations in adapter */
65 memmove(&adapter->if_ops, if_ops, sizeof(struct mwifiex_if_ops));
67 /* card specific initialization has been deferred until now .. */
68 if (adapter->if_ops.init_if)
69 if (adapter->if_ops.init_if(adapter))
72 adapter->priv_num = 0;
74 for (i = 0; i < MWIFIEX_MAX_BSS_NUM; i++) {
75 /* Allocate memory for private structure */
77 kzalloc(sizeof(struct mwifiex_private), GFP_KERNEL);
78 if (!adapter->priv[i])
81 adapter->priv[i]->adapter = adapter;
84 mwifiex_init_lock_list(adapter);
86 init_timer(&adapter->cmd_timer);
87 adapter->cmd_timer.function = mwifiex_cmd_timeout_func;
88 adapter->cmd_timer.data = (unsigned long) adapter;
93 dev_dbg(adapter->dev, "info: leave mwifiex_register with error\n");
95 for (i = 0; i < adapter->priv_num; i++)
96 kfree(adapter->priv[i]);
104 * This function unregisters the device and performs all the necessary
107 * The following cleanup operations are performed -
109 * - Free beacon buffers
110 * - Free private structures
111 * - Free adapter structure
113 static int mwifiex_unregister(struct mwifiex_adapter *adapter)
117 if (adapter->if_ops.cleanup_if)
118 adapter->if_ops.cleanup_if(adapter);
120 del_timer_sync(&adapter->cmd_timer);
122 /* Free private structures */
123 for (i = 0; i < adapter->priv_num; i++) {
124 if (adapter->priv[i]) {
125 mwifiex_free_curr_bcn(adapter->priv[i]);
126 kfree(adapter->priv[i]);
130 vfree(adapter->chan_stats);
135 static int mwifiex_process_rx(struct mwifiex_adapter *adapter)
140 spin_lock_irqsave(&adapter->rx_proc_lock, flags);
141 if (adapter->rx_processing || adapter->rx_locked) {
142 spin_unlock_irqrestore(&adapter->rx_proc_lock, flags);
145 adapter->rx_processing = true;
146 spin_unlock_irqrestore(&adapter->rx_proc_lock, flags);
149 /* Check for Rx data */
150 while ((skb = skb_dequeue(&adapter->rx_data_q))) {
151 atomic_dec(&adapter->rx_pending);
152 if ((adapter->delay_main_work ||
153 adapter->iface_type == MWIFIEX_USB) &&
154 (atomic_read(&adapter->rx_pending) < LOW_RX_PENDING)) {
155 if (adapter->if_ops.submit_rem_rx_urbs)
156 adapter->if_ops.submit_rem_rx_urbs(adapter);
157 adapter->delay_main_work = false;
158 queue_work(adapter->workqueue, &adapter->main_work);
160 mwifiex_handle_rx_packet(adapter, skb);
162 spin_lock_irqsave(&adapter->rx_proc_lock, flags);
163 adapter->rx_processing = false;
164 spin_unlock_irqrestore(&adapter->rx_proc_lock, flags);
173 * This function is the main procedure of the driver and handles various driver
174 * operations. It runs in a loop and provides the core functionalities.
176 * The main responsibilities of this function are -
177 * - Ensure concurrency control
178 * - Handle pending interrupts and call interrupt handlers
179 * - Wake up the card if required
180 * - Handle command responses and call response handlers
181 * - Handle events and call event handlers
182 * - Execute pending commands
183 * - Transmit pending data packets
185 int mwifiex_main_process(struct mwifiex_adapter *adapter)
190 spin_lock_irqsave(&adapter->main_proc_lock, flags);
192 /* Check if already processing */
193 if (adapter->mwifiex_processing) {
194 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
197 adapter->mwifiex_processing = true;
198 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
202 if ((adapter->hw_status == MWIFIEX_HW_STATUS_CLOSING) ||
203 (adapter->hw_status == MWIFIEX_HW_STATUS_NOT_READY))
206 /* For non-USB interfaces, If we process interrupts first, it
207 * would increase RX pending even further. Avoid this by
208 * checking if rx_pending has crossed high threshold and
209 * schedule rx work queue and then process interrupts.
210 * For USB interface, there are no interrupts. We already have
211 * HIGH_RX_PENDING check in usb.c
213 if (atomic_read(&adapter->rx_pending) >= HIGH_RX_PENDING &&
214 adapter->iface_type != MWIFIEX_USB) {
215 adapter->delay_main_work = true;
216 if (!adapter->rx_processing)
217 queue_work(adapter->rx_workqueue,
222 /* Handle pending interrupt if any */
223 if (adapter->int_status) {
224 if (adapter->hs_activated)
225 mwifiex_process_hs_config(adapter);
226 if (adapter->if_ops.process_int_status)
227 adapter->if_ops.process_int_status(adapter);
230 if (adapter->rx_work_enabled && adapter->data_received)
231 queue_work(adapter->rx_workqueue, &adapter->rx_work);
233 /* Need to wake up the card ? */
234 if ((adapter->ps_state == PS_STATE_SLEEP) &&
235 (adapter->pm_wakeup_card_req &&
236 !adapter->pm_wakeup_fw_try) &&
237 (is_command_pending(adapter) ||
238 !mwifiex_wmm_lists_empty(adapter))) {
239 adapter->pm_wakeup_fw_try = true;
240 adapter->if_ops.wakeup(adapter);
244 if (IS_CARD_RX_RCVD(adapter)) {
245 adapter->data_received = false;
246 adapter->pm_wakeup_fw_try = false;
247 if (adapter->ps_state == PS_STATE_SLEEP)
248 adapter->ps_state = PS_STATE_AWAKE;
250 /* We have tried to wakeup the card already */
251 if (adapter->pm_wakeup_fw_try)
253 if (adapter->ps_state != PS_STATE_AWAKE ||
254 adapter->tx_lock_flag)
257 if ((!adapter->scan_chan_gap_enabled &&
258 adapter->scan_processing) || adapter->data_sent ||
259 mwifiex_wmm_lists_empty(adapter)) {
260 if (adapter->cmd_sent || adapter->curr_cmd ||
261 (!is_command_pending(adapter)))
266 /* Check for event */
267 if (adapter->event_received) {
268 adapter->event_received = false;
269 mwifiex_process_event(adapter);
272 /* Check for Cmd Resp */
273 if (adapter->cmd_resp_received) {
274 adapter->cmd_resp_received = false;
275 mwifiex_process_cmdresp(adapter);
277 /* call mwifiex back when init_fw is done */
278 if (adapter->hw_status == MWIFIEX_HW_STATUS_INIT_DONE) {
279 adapter->hw_status = MWIFIEX_HW_STATUS_READY;
280 mwifiex_init_fw_complete(adapter);
284 /* Check if we need to confirm Sleep Request
285 received previously */
286 if (adapter->ps_state == PS_STATE_PRE_SLEEP) {
287 if (!adapter->cmd_sent && !adapter->curr_cmd)
288 mwifiex_check_ps_cond(adapter);
291 /* * The ps_state may have been changed during processing of
292 * Sleep Request event.
294 if ((adapter->ps_state == PS_STATE_SLEEP) ||
295 (adapter->ps_state == PS_STATE_PRE_SLEEP) ||
296 (adapter->ps_state == PS_STATE_SLEEP_CFM) ||
297 adapter->tx_lock_flag)
300 if (!adapter->cmd_sent && !adapter->curr_cmd) {
301 if (mwifiex_exec_next_cmd(adapter) == -1) {
307 if ((adapter->scan_chan_gap_enabled ||
308 !adapter->scan_processing) &&
309 !adapter->data_sent && !mwifiex_wmm_lists_empty(adapter)) {
310 mwifiex_wmm_process_tx(adapter);
311 if (adapter->hs_activated) {
312 adapter->is_hs_configured = false;
313 mwifiex_hs_activated_event
315 (adapter, MWIFIEX_BSS_ROLE_ANY),
320 if (adapter->delay_null_pkt && !adapter->cmd_sent &&
321 !adapter->curr_cmd && !is_command_pending(adapter) &&
322 mwifiex_wmm_lists_empty(adapter)) {
323 if (!mwifiex_send_null_packet
324 (mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA),
325 MWIFIEX_TxPD_POWER_MGMT_NULL_PACKET |
326 MWIFIEX_TxPD_POWER_MGMT_LAST_PACKET)) {
327 adapter->delay_null_pkt = false;
328 adapter->ps_state = PS_STATE_SLEEP;
334 spin_lock_irqsave(&adapter->main_proc_lock, flags);
335 if (!adapter->delay_main_work &&
336 (adapter->int_status || IS_CARD_RX_RCVD(adapter))) {
337 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
341 adapter->mwifiex_processing = false;
342 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
345 if (adapter->hw_status == MWIFIEX_HW_STATUS_CLOSING)
346 mwifiex_shutdown_drv(adapter);
349 EXPORT_SYMBOL_GPL(mwifiex_main_process);
352 * This function frees the adapter structure.
354 * Additionally, this closes the netlink socket, frees the timers
355 * and private structures.
357 static void mwifiex_free_adapter(struct mwifiex_adapter *adapter)
360 pr_err("%s: adapter is NULL\n", __func__);
364 mwifiex_unregister(adapter);
365 pr_debug("info: %s: free adapter\n", __func__);
369 * This function cancels all works in the queue and destroys
370 * the main workqueue.
372 static void mwifiex_terminate_workqueue(struct mwifiex_adapter *adapter)
374 flush_workqueue(adapter->workqueue);
375 destroy_workqueue(adapter->workqueue);
376 adapter->workqueue = NULL;
378 if (adapter->rx_workqueue) {
379 flush_workqueue(adapter->rx_workqueue);
380 destroy_workqueue(adapter->rx_workqueue);
381 adapter->rx_workqueue = NULL;
386 * This function gets firmware and initializes it.
388 * The main initialization steps followed are -
389 * - Download the correct firmware to card
390 * - Issue the init commands to firmware
392 static void mwifiex_fw_dpc(const struct firmware *firmware, void *context)
396 struct mwifiex_private *priv;
397 struct mwifiex_adapter *adapter = context;
398 struct mwifiex_fw_image fw;
399 struct semaphore *sem = adapter->card_sem;
400 bool init_failed = false;
401 struct wireless_dev *wdev;
404 dev_err(adapter->dev,
405 "Failed to get firmware %s\n", adapter->fw_name);
409 memset(&fw, 0, sizeof(struct mwifiex_fw_image));
410 adapter->firmware = firmware;
411 fw.fw_buf = (u8 *) adapter->firmware->data;
412 fw.fw_len = adapter->firmware->size;
414 if (adapter->if_ops.dnld_fw)
415 ret = adapter->if_ops.dnld_fw(adapter, &fw);
417 ret = mwifiex_dnld_fw(adapter, &fw);
421 dev_notice(adapter->dev, "WLAN FW is active\n");
424 if ((request_firmware(&adapter->cal_data, cal_data_cfg,
426 dev_err(adapter->dev,
427 "Cal data request_firmware() failed\n");
430 /* enable host interrupt after fw dnld is successful */
431 if (adapter->if_ops.enable_int) {
432 if (adapter->if_ops.enable_int(adapter))
436 adapter->init_wait_q_woken = false;
437 ret = mwifiex_init_fw(adapter);
441 adapter->hw_status = MWIFIEX_HW_STATUS_READY;
444 /* Wait for mwifiex_init to complete */
445 wait_event_interruptible(adapter->init_wait_q,
446 adapter->init_wait_q_woken);
447 if (adapter->hw_status != MWIFIEX_HW_STATUS_READY)
450 priv = adapter->priv[MWIFIEX_BSS_ROLE_STA];
451 if (mwifiex_register_cfg80211(adapter)) {
452 dev_err(adapter->dev, "cannot register with cfg80211\n");
456 if (mwifiex_init_channel_scan_gap(adapter)) {
457 dev_err(adapter->dev, "could not init channel stats table\n");
462 driver_mode &= MWIFIEX_DRIVER_MODE_BITMASK;
463 driver_mode |= MWIFIEX_DRIVER_MODE_STA;
467 /* Create station interface by default */
468 wdev = mwifiex_add_virtual_intf(adapter->wiphy, "mlan%d",
469 NL80211_IFTYPE_STATION, NULL, NULL);
471 dev_err(adapter->dev, "cannot create default STA interface\n");
476 if (driver_mode & MWIFIEX_DRIVER_MODE_UAP) {
477 wdev = mwifiex_add_virtual_intf(adapter->wiphy, "uap%d",
478 NL80211_IFTYPE_AP, NULL, NULL);
480 dev_err(adapter->dev, "cannot create AP interface\n");
486 if (driver_mode & MWIFIEX_DRIVER_MODE_P2P) {
487 wdev = mwifiex_add_virtual_intf(adapter->wiphy, "p2p%d",
488 NL80211_IFTYPE_P2P_CLIENT, NULL,
491 dev_err(adapter->dev,
492 "cannot create p2p client interface\n");
499 mwifiex_drv_get_driver_version(adapter, fmt, sizeof(fmt) - 1);
500 dev_notice(adapter->dev, "driver_version = %s\n", fmt);
504 wiphy_unregister(adapter->wiphy);
505 wiphy_free(adapter->wiphy);
507 if (adapter->if_ops.disable_int)
508 adapter->if_ops.disable_int(adapter);
510 pr_debug("info: %s: unregister device\n", __func__);
511 if (adapter->if_ops.unregister_dev)
512 adapter->if_ops.unregister_dev(adapter);
514 if ((adapter->hw_status == MWIFIEX_HW_STATUS_FW_READY) ||
515 (adapter->hw_status == MWIFIEX_HW_STATUS_READY)) {
516 pr_debug("info: %s: shutdown mwifiex\n", __func__);
517 adapter->init_wait_q_woken = false;
519 if (mwifiex_shutdown_drv(adapter) == -EINPROGRESS)
520 wait_event_interruptible(adapter->init_wait_q,
521 adapter->init_wait_q_woken);
523 adapter->surprise_removed = true;
524 mwifiex_terminate_workqueue(adapter);
527 if (adapter->cal_data) {
528 release_firmware(adapter->cal_data);
529 adapter->cal_data = NULL;
531 if (adapter->firmware) {
532 release_firmware(adapter->firmware);
533 adapter->firmware = NULL;
536 mwifiex_free_adapter(adapter);
542 * This function initializes the hardware and gets firmware.
544 static int mwifiex_init_hw_fw(struct mwifiex_adapter *adapter)
548 ret = request_firmware_nowait(THIS_MODULE, 1, adapter->fw_name,
549 adapter->dev, GFP_KERNEL, adapter,
552 dev_err(adapter->dev,
553 "request_firmware_nowait() returned error %d\n", ret);
558 * CFG802.11 network device handler for open.
560 * Starts the data queue.
563 mwifiex_open(struct net_device *dev)
565 netif_tx_start_all_queues(dev);
570 * CFG802.11 network device handler for close.
573 mwifiex_close(struct net_device *dev)
575 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
577 if (priv->scan_request) {
578 dev_dbg(priv->adapter->dev, "aborting scan on ndo_stop\n");
579 cfg80211_scan_done(priv->scan_request, 1);
580 priv->scan_request = NULL;
581 priv->scan_aborting = true;
588 * Add buffer into wmm tx queue and queue work to transmit it.
590 int mwifiex_queue_tx_pkt(struct mwifiex_private *priv, struct sk_buff *skb)
592 struct netdev_queue *txq;
593 int index = mwifiex_1d_to_wmm_queue[skb->priority];
595 if (atomic_inc_return(&priv->wmm_tx_pending[index]) >= MAX_TX_PENDING) {
596 txq = netdev_get_tx_queue(priv->netdev, index);
597 if (!netif_tx_queue_stopped(txq)) {
598 netif_tx_stop_queue(txq);
599 dev_dbg(priv->adapter->dev, "stop queue: %d\n", index);
603 atomic_inc(&priv->adapter->tx_pending);
604 mwifiex_wmm_add_buf_txqueue(priv, skb);
606 queue_work(priv->adapter->workqueue, &priv->adapter->main_work);
612 mwifiex_clone_skb_for_tx_status(struct mwifiex_private *priv,
613 struct sk_buff *skb, u8 flag, u64 *cookie)
615 struct sk_buff *orig_skb = skb;
616 struct mwifiex_txinfo *tx_info, *orig_tx_info;
618 skb = skb_clone(skb, GFP_ATOMIC);
623 spin_lock_irqsave(&priv->ack_status_lock, flags);
624 id = idr_alloc(&priv->ack_status_frames, orig_skb,
625 1, 0xff, GFP_ATOMIC);
626 spin_unlock_irqrestore(&priv->ack_status_lock, flags);
629 tx_info = MWIFIEX_SKB_TXCB(skb);
630 tx_info->ack_frame_id = id;
631 tx_info->flags |= flag;
632 orig_tx_info = MWIFIEX_SKB_TXCB(orig_skb);
633 orig_tx_info->ack_frame_id = id;
634 orig_tx_info->flags |= flag;
636 if (flag == MWIFIEX_BUF_FLAG_ACTION_TX_STATUS && cookie)
637 orig_tx_info->cookie = *cookie;
639 } else if (skb_shared(skb)) {
646 /* couldn't clone -- lose tx status ... */
654 * CFG802.11 network device handler for data transmission.
657 mwifiex_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
659 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
660 struct sk_buff *new_skb;
661 struct mwifiex_txinfo *tx_info;
664 dev_dbg(priv->adapter->dev, "data: %lu BSS(%d-%d): Data <= kernel\n",
665 jiffies, priv->bss_type, priv->bss_num);
667 if (priv->adapter->surprise_removed) {
669 priv->stats.tx_dropped++;
672 if (!skb->len || (skb->len > ETH_FRAME_LEN)) {
673 dev_err(priv->adapter->dev, "Tx: bad skb len %d\n", skb->len);
675 priv->stats.tx_dropped++;
678 if (skb_headroom(skb) < MWIFIEX_MIN_DATA_HEADER_LEN) {
679 dev_dbg(priv->adapter->dev,
680 "data: Tx: insufficient skb headroom %d\n",
682 /* Insufficient skb headroom - allocate a new skb */
684 skb_realloc_headroom(skb, MWIFIEX_MIN_DATA_HEADER_LEN);
685 if (unlikely(!new_skb)) {
686 dev_err(priv->adapter->dev, "Tx: cannot alloca new_skb\n");
688 priv->stats.tx_dropped++;
693 dev_dbg(priv->adapter->dev, "info: new skb headroomd %d\n",
697 tx_info = MWIFIEX_SKB_TXCB(skb);
698 memset(tx_info, 0, sizeof(*tx_info));
699 tx_info->bss_num = priv->bss_num;
700 tx_info->bss_type = priv->bss_type;
701 tx_info->pkt_len = skb->len;
703 multicast = is_multicast_ether_addr(skb->data);
705 if (unlikely(!multicast && skb->sk &&
706 skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS &&
707 priv->adapter->fw_api_ver == MWIFIEX_FW_V15))
708 skb = mwifiex_clone_skb_for_tx_status(priv,
710 MWIFIEX_BUF_FLAG_EAPOL_TX_STATUS, NULL);
712 /* Record the current time the packet was queued; used to
713 * determine the amount of time the packet was queued in
714 * the driver before it was sent to the firmware.
715 * The delay is then sent along with the packet to the
716 * firmware for aggregate delay calculation for stats and
717 * MSDU lifetime expiry.
719 __net_timestamp(skb);
721 if (ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) &&
722 priv->bss_type == MWIFIEX_BSS_TYPE_STA &&
723 !ether_addr_equal_unaligned(priv->cfg_bssid, skb->data)) {
724 if (priv->adapter->auto_tdls && priv->check_tdls_tx)
725 mwifiex_tdls_check_tx(priv, skb);
728 mwifiex_queue_tx_pkt(priv, skb);
734 * CFG802.11 network device handler for setting MAC address.
737 mwifiex_set_mac_address(struct net_device *dev, void *addr)
739 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
740 struct sockaddr *hw_addr = addr;
743 memcpy(priv->curr_addr, hw_addr->sa_data, ETH_ALEN);
745 /* Send request to firmware */
746 ret = mwifiex_send_cmd(priv, HostCmd_CMD_802_11_MAC_ADDRESS,
747 HostCmd_ACT_GEN_SET, 0, NULL, true);
750 memcpy(priv->netdev->dev_addr, priv->curr_addr, ETH_ALEN);
752 dev_err(priv->adapter->dev,
753 "set mac address failed: ret=%d\n", ret);
755 memcpy(dev->dev_addr, priv->curr_addr, ETH_ALEN);
761 * CFG802.11 network device handler for setting multicast list.
763 static void mwifiex_set_multicast_list(struct net_device *dev)
765 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
766 struct mwifiex_multicast_list mcast_list;
768 if (dev->flags & IFF_PROMISC) {
769 mcast_list.mode = MWIFIEX_PROMISC_MODE;
770 } else if (dev->flags & IFF_ALLMULTI ||
771 netdev_mc_count(dev) > MWIFIEX_MAX_MULTICAST_LIST_SIZE) {
772 mcast_list.mode = MWIFIEX_ALL_MULTI_MODE;
774 mcast_list.mode = MWIFIEX_MULTICAST_MODE;
775 mcast_list.num_multicast_addr =
776 mwifiex_copy_mcast_addr(&mcast_list, dev);
778 mwifiex_request_set_multicast_list(priv, &mcast_list);
782 * CFG802.11 network device handler for transmission timeout.
785 mwifiex_tx_timeout(struct net_device *dev)
787 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
789 priv->num_tx_timeout++;
790 priv->tx_timeout_cnt++;
791 dev_err(priv->adapter->dev,
792 "%lu : Tx timeout(#%d), bss_type-num = %d-%d\n",
793 jiffies, priv->tx_timeout_cnt, priv->bss_type, priv->bss_num);
794 mwifiex_set_trans_start(dev);
796 if (priv->tx_timeout_cnt > TX_TIMEOUT_THRESHOLD &&
797 priv->adapter->if_ops.card_reset) {
798 dev_err(priv->adapter->dev,
799 "tx_timeout_cnt exceeds threshold. Triggering card reset!\n");
800 priv->adapter->if_ops.card_reset(priv->adapter);
805 * CFG802.11 network device handler for statistics retrieval.
807 static struct net_device_stats *mwifiex_get_stats(struct net_device *dev)
809 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
815 mwifiex_netdev_select_wmm_queue(struct net_device *dev, struct sk_buff *skb,
816 void *accel_priv, select_queue_fallback_t fallback)
818 skb->priority = cfg80211_classify8021d(skb, NULL);
819 return mwifiex_1d_to_wmm_queue[skb->priority];
822 /* Network device handlers */
823 static const struct net_device_ops mwifiex_netdev_ops = {
824 .ndo_open = mwifiex_open,
825 .ndo_stop = mwifiex_close,
826 .ndo_start_xmit = mwifiex_hard_start_xmit,
827 .ndo_set_mac_address = mwifiex_set_mac_address,
828 .ndo_tx_timeout = mwifiex_tx_timeout,
829 .ndo_get_stats = mwifiex_get_stats,
830 .ndo_set_rx_mode = mwifiex_set_multicast_list,
831 .ndo_select_queue = mwifiex_netdev_select_wmm_queue,
835 * This function initializes the private structure parameters.
837 * The following wait queues are initialized -
839 * - Command wait queue
840 * - Statistics wait queue
842 * ...and the following default parameters are set -
843 * - Current key index : Set to 0
844 * - Rate index : Set to auto
845 * - Media connected : Set to disconnected
846 * - Adhoc link sensed : Set to false
847 * - Nick name : Set to null
848 * - Number of Tx timeout : Set to 0
849 * - Device address : Set to current address
851 * In addition, the CFG80211 work queue is also created.
853 void mwifiex_init_priv_params(struct mwifiex_private *priv,
854 struct net_device *dev)
856 dev->netdev_ops = &mwifiex_netdev_ops;
857 dev->destructor = free_netdev;
858 /* Initialize private structure */
859 priv->current_key_index = 0;
860 priv->media_connected = false;
861 memset(&priv->nick_name, 0, sizeof(priv->nick_name));
862 memset(priv->mgmt_ie, 0,
863 sizeof(struct mwifiex_ie) * MAX_MGMT_IE_INDEX);
864 priv->beacon_idx = MWIFIEX_AUTO_IDX_MASK;
865 priv->proberesp_idx = MWIFIEX_AUTO_IDX_MASK;
866 priv->assocresp_idx = MWIFIEX_AUTO_IDX_MASK;
867 priv->rsn_idx = MWIFIEX_AUTO_IDX_MASK;
868 priv->num_tx_timeout = 0;
869 memcpy(dev->dev_addr, priv->curr_addr, ETH_ALEN);
873 * This function check if command is pending.
875 int is_command_pending(struct mwifiex_adapter *adapter)
878 int is_cmd_pend_q_empty;
880 spin_lock_irqsave(&adapter->cmd_pending_q_lock, flags);
881 is_cmd_pend_q_empty = list_empty(&adapter->cmd_pending_q);
882 spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, flags);
884 return !is_cmd_pend_q_empty;
888 * This is the RX work queue function.
890 * It handles the RX operations.
892 static void mwifiex_rx_work_queue(struct work_struct *work)
894 struct mwifiex_adapter *adapter =
895 container_of(work, struct mwifiex_adapter, rx_work);
897 if (adapter->surprise_removed)
899 mwifiex_process_rx(adapter);
903 * This is the main work queue function.
905 * It handles the main process, which in turn handles the complete
908 static void mwifiex_main_work_queue(struct work_struct *work)
910 struct mwifiex_adapter *adapter =
911 container_of(work, struct mwifiex_adapter, main_work);
913 if (adapter->surprise_removed)
915 mwifiex_main_process(adapter);
919 * This function adds the card.
921 * This function follows the following major steps to set up the device -
922 * - Initialize software. This includes probing the card, registering
923 * the interface operations table, and allocating/initializing the
925 * - Set up the netlink socket
926 * - Create and start the main work queue
927 * - Register the device
928 * - Initialize firmware and hardware
929 * - Add logical interfaces
932 mwifiex_add_card(void *card, struct semaphore *sem,
933 struct mwifiex_if_ops *if_ops, u8 iface_type)
935 struct mwifiex_adapter *adapter;
937 if (down_interruptible(sem))
940 if (mwifiex_register(card, if_ops, (void **)&adapter)) {
941 pr_err("%s: software init failed\n", __func__);
945 adapter->iface_type = iface_type;
946 adapter->card_sem = sem;
948 adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
949 adapter->surprise_removed = false;
950 init_waitqueue_head(&adapter->init_wait_q);
951 adapter->is_suspended = false;
952 adapter->hs_activated = false;
953 init_waitqueue_head(&adapter->hs_activate_wait_q);
954 init_waitqueue_head(&adapter->cmd_wait_q.wait);
955 adapter->cmd_wait_q.status = 0;
956 adapter->scan_wait_q_woken = false;
958 if ((num_possible_cpus() > 1) || adapter->iface_type == MWIFIEX_USB) {
959 adapter->rx_work_enabled = true;
960 pr_notice("rx work enabled, cpus %d\n", num_possible_cpus());
964 alloc_workqueue("MWIFIEX_WORK_QUEUE",
965 WQ_HIGHPRI | WQ_MEM_RECLAIM | WQ_UNBOUND, 1);
966 if (!adapter->workqueue)
969 INIT_WORK(&adapter->main_work, mwifiex_main_work_queue);
971 if (adapter->rx_work_enabled) {
972 adapter->rx_workqueue = alloc_workqueue("MWIFIEX_RX_WORK_QUEUE",
976 if (!adapter->rx_workqueue)
979 INIT_WORK(&adapter->rx_work, mwifiex_rx_work_queue);
982 if (adapter->if_ops.iface_work)
983 INIT_WORK(&adapter->iface_work, adapter->if_ops.iface_work);
985 /* Register the device. Fill up the private data structure with relevant
986 information from the card. */
987 if (adapter->if_ops.register_dev(adapter)) {
988 pr_err("%s: failed to register mwifiex device\n", __func__);
989 goto err_registerdev;
992 if (mwifiex_init_hw_fw(adapter)) {
993 pr_err("%s: firmware init failed\n", __func__);
1000 pr_debug("info: %s: unregister device\n", __func__);
1001 if (adapter->if_ops.unregister_dev)
1002 adapter->if_ops.unregister_dev(adapter);
1003 if ((adapter->hw_status == MWIFIEX_HW_STATUS_FW_READY) ||
1004 (adapter->hw_status == MWIFIEX_HW_STATUS_READY)) {
1005 pr_debug("info: %s: shutdown mwifiex\n", __func__);
1006 adapter->init_wait_q_woken = false;
1008 if (mwifiex_shutdown_drv(adapter) == -EINPROGRESS)
1009 wait_event_interruptible(adapter->init_wait_q,
1010 adapter->init_wait_q_woken);
1013 adapter->surprise_removed = true;
1014 mwifiex_terminate_workqueue(adapter);
1016 mwifiex_free_adapter(adapter);
1024 EXPORT_SYMBOL_GPL(mwifiex_add_card);
1027 * This function removes the card.
1029 * This function follows the following major steps to remove the device -
1030 * - Stop data traffic
1031 * - Shutdown firmware
1032 * - Remove the logical interfaces
1033 * - Terminate the work queue
1034 * - Unregister the device
1035 * - Free the adapter structure
1037 int mwifiex_remove_card(struct mwifiex_adapter *adapter, struct semaphore *sem)
1039 struct mwifiex_private *priv = NULL;
1042 if (down_interruptible(sem))
1048 /* We can no longer handle interrupts once we start doing the teardown
1050 if (adapter->if_ops.disable_int)
1051 adapter->if_ops.disable_int(adapter);
1053 adapter->surprise_removed = true;
1056 for (i = 0; i < adapter->priv_num; i++) {
1057 priv = adapter->priv[i];
1058 if (priv && priv->netdev) {
1059 mwifiex_stop_net_dev_queue(priv->netdev, adapter);
1060 if (netif_carrier_ok(priv->netdev))
1061 netif_carrier_off(priv->netdev);
1065 dev_dbg(adapter->dev, "cmd: calling mwifiex_shutdown_drv...\n");
1066 adapter->init_wait_q_woken = false;
1068 if (mwifiex_shutdown_drv(adapter) == -EINPROGRESS)
1069 wait_event_interruptible(adapter->init_wait_q,
1070 adapter->init_wait_q_woken);
1071 dev_dbg(adapter->dev, "cmd: mwifiex_shutdown_drv done\n");
1072 if (atomic_read(&adapter->rx_pending) ||
1073 atomic_read(&adapter->tx_pending) ||
1074 atomic_read(&adapter->cmd_pending)) {
1075 dev_err(adapter->dev, "rx_pending=%d, tx_pending=%d, "
1077 atomic_read(&adapter->rx_pending),
1078 atomic_read(&adapter->tx_pending),
1079 atomic_read(&adapter->cmd_pending));
1082 for (i = 0; i < adapter->priv_num; i++) {
1083 priv = adapter->priv[i];
1089 if (priv->wdev && priv->netdev)
1090 mwifiex_del_virtual_intf(adapter->wiphy, priv->wdev);
1094 wiphy_unregister(adapter->wiphy);
1095 wiphy_free(adapter->wiphy);
1097 mwifiex_terminate_workqueue(adapter);
1099 /* Unregister device */
1100 dev_dbg(adapter->dev, "info: unregister device\n");
1101 if (adapter->if_ops.unregister_dev)
1102 adapter->if_ops.unregister_dev(adapter);
1103 /* Free adapter structure */
1104 dev_dbg(adapter->dev, "info: free adapter\n");
1105 mwifiex_free_adapter(adapter);
1112 EXPORT_SYMBOL_GPL(mwifiex_remove_card);
1115 * This function initializes the module.
1117 * The debug FS is also initialized if configured.
1120 mwifiex_init_module(void)
1122 #ifdef CONFIG_DEBUG_FS
1123 mwifiex_debugfs_init();
1129 * This function cleans up the module.
1131 * The debug FS is removed if available.
1134 mwifiex_cleanup_module(void)
1136 #ifdef CONFIG_DEBUG_FS
1137 mwifiex_debugfs_remove();
1141 module_init(mwifiex_init_module);
1142 module_exit(mwifiex_cleanup_module);
1144 MODULE_AUTHOR("Marvell International Ltd.");
1145 MODULE_DESCRIPTION("Marvell WiFi-Ex Driver version " VERSION);
1146 MODULE_VERSION(VERSION);
1147 MODULE_LICENSE("GPL v2");