blob: 6bf58aba51d20ca59253efb55ada327888615e5d [file] [log] [blame]
Bing Zhao5e6e3a92011-03-21 18:00:50 -07001/*
2 * Marvell Wireless LAN device driver: major functions
3 *
4 * Copyright (C) 2011, Marvell International Ltd.
5 *
6 * This software file (the "File") is distributed by Marvell International
7 * Ltd. under the terms of the GNU General Public License Version 2, June 1991
8 * (the "License"). You may use, redistribute and/or modify this File in
9 * accordance with the terms and conditions of the License, a copy of which
10 * is available by writing to the Free Software Foundation, Inc.,
11 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
12 * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
13 *
14 * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
16 * ARE EXPRESSLY DISCLAIMED. The License provides additional details about
17 * this warranty disclaimer.
18 */
19
20#include "main.h"
21#include "wmm.h"
22#include "cfg80211.h"
23#include "11n.h"
24
25#define VERSION "1.0"
26
27const char driver_version[] = "mwifiex " VERSION " (%s) ";
Amitkumar Karwar388ec382013-05-17 17:50:25 -070028static char *cal_data_cfg;
29module_param(cal_data_cfg, charp, 0);
Bing Zhao5e6e3a92011-03-21 18:00:50 -070030
Amitkumar Karwardf810082013-06-04 16:19:56 -070031static void scan_delay_timer_fn(unsigned long data)
32{
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 unsigned long flags;
37
38 if (adapter->surprise_removed)
39 return;
40
41 if (adapter->scan_delay_cnt == MWIFIEX_MAX_SCAN_DELAY_CNT) {
42 /*
43 * Abort scan operation by cancelling all pending scan
44 * commands
45 */
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);
51 }
52 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
53
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);
59
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;
64 } else {
65 priv->scan_aborting = false;
66 dev_dbg(adapter->dev, "info: scan already aborted\n");
67 }
68 goto done;
69 }
70
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) {
74 /*
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
78 */
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,
86 flags);
87
88 mwifiex_insert_cmd_to_pending_q(adapter, cmd_node,
89 true);
90 queue_work(adapter->workqueue, &adapter->main_work);
91 goto done;
92 }
93 } else {
94 adapter->empty_tx_q_cnt = 0;
95 }
96
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++;
101
102done:
103 if (atomic_read(&priv->adapter->is_tx_received))
104 atomic_set(&priv->adapter->is_tx_received, false);
105
106 return;
107}
108
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700109/*
110 * This function registers the device and performs all the necessary
111 * initializations.
112 *
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
119 * - Initialize locks
120 *
121 * In case of any errors during inittialization, this function also ensures
122 * proper cleanup before exiting.
123 */
124static int mwifiex_register(void *card, struct mwifiex_if_ops *if_ops,
Amitkumar Karwar287546d2011-06-08 20:39:20 +0530125 void **padapter)
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700126{
Amitkumar Karwar2be78592011-04-15 20:50:42 -0700127 struct mwifiex_adapter *adapter;
128 int i;
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700129
130 adapter = kzalloc(sizeof(struct mwifiex_adapter), GFP_KERNEL);
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700131 if (!adapter)
Christoph Fritzb53575e2011-05-08 22:50:09 +0200132 return -ENOMEM;
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700133
Amitkumar Karwar287546d2011-06-08 20:39:20 +0530134 *padapter = adapter;
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700135 adapter->card = card;
136
137 /* Save interface specific operations in adapter */
138 memmove(&adapter->if_ops, if_ops, sizeof(struct mwifiex_if_ops));
139
140 /* card specific initialization has been deferred until now .. */
Amitkumar Karwar4daffe32012-04-18 20:08:28 -0700141 if (adapter->if_ops.init_if)
142 if (adapter->if_ops.init_if(adapter))
143 goto error;
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700144
145 adapter->priv_num = 0;
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700146
Avinash Patil64b05e22012-05-08 18:30:13 -0700147 for (i = 0; i < MWIFIEX_MAX_BSS_NUM; i++) {
148 /* Allocate memory for private structure */
149 adapter->priv[i] =
150 kzalloc(sizeof(struct mwifiex_private), GFP_KERNEL);
151 if (!adapter->priv[i])
152 goto error;
153
154 adapter->priv[i]->adapter = adapter;
Avinash Patil64b05e22012-05-08 18:30:13 -0700155 adapter->priv_num++;
Amitkumar Karwardf810082013-06-04 16:19:56 -0700156
157 setup_timer(&adapter->priv[i]->scan_delay_timer,
158 scan_delay_timer_fn,
159 (unsigned long)adapter->priv[i]);
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700160 }
Amitkumar Karwar44b815c2011-09-29 20:43:41 -0700161 mwifiex_init_lock_list(adapter);
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700162
163 init_timer(&adapter->cmd_timer);
164 adapter->cmd_timer.function = mwifiex_cmd_timeout_func;
165 adapter->cmd_timer.data = (unsigned long) adapter;
166
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700167 return 0;
168
169error:
170 dev_dbg(adapter->dev, "info: leave mwifiex_register with error\n");
171
Yogesh Ashok Powar93a1df42011-09-26 20:37:26 -0700172 for (i = 0; i < adapter->priv_num; i++)
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700173 kfree(adapter->priv[i]);
Yogesh Ashok Powar93a1df42011-09-26 20:37:26 -0700174
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700175 kfree(adapter);
176
177 return -1;
178}
179
180/*
181 * This function unregisters the device and performs all the necessary
182 * cleanups.
183 *
184 * The following cleanup operations are performed -
185 * - Free the timers
186 * - Free beacon buffers
187 * - Free private structures
188 * - Free adapter structure
189 */
190static int mwifiex_unregister(struct mwifiex_adapter *adapter)
191{
Yogesh Ashok Powar270e58e2011-05-03 20:11:46 -0700192 s32 i;
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700193
Amitkumar Karwar4cfda672013-07-22 19:17:50 -0700194 if (adapter->if_ops.cleanup_if)
195 adapter->if_ops.cleanup_if(adapter);
196
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700197 del_timer(&adapter->cmd_timer);
198
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]);
Amitkumar Karwar003d87c2013-07-22 19:17:48 -0700203 del_timer_sync(&adapter->priv[i]->scan_delay_timer);
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700204 kfree(adapter->priv[i]);
205 }
206 }
207
208 kfree(adapter);
209 return 0;
210}
211
212/*
213 * The main process.
214 *
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.
217 *
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
226 */
227int mwifiex_main_process(struct mwifiex_adapter *adapter)
228{
229 int ret = 0;
230 unsigned long flags;
Amitkumar Karwar4daffe32012-04-18 20:08:28 -0700231 struct sk_buff *skb;
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700232
233 spin_lock_irqsave(&adapter->main_proc_lock, flags);
234
235 /* Check if already processing */
236 if (adapter->mwifiex_processing) {
237 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
238 goto exit_main_proc;
239 } else {
240 adapter->mwifiex_processing = true;
241 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
242 }
243process_start:
244 do {
245 if ((adapter->hw_status == MWIFIEX_HW_STATUS_CLOSING) ||
246 (adapter->hw_status == MWIFIEX_HW_STATUS_NOT_READY))
247 break;
248
249 /* Handle pending interrupt if any */
250 if (adapter->int_status) {
251 if (adapter->hs_activated)
252 mwifiex_process_hs_config(adapter);
Amitkumar Karwar4daffe32012-04-18 20:08:28 -0700253 if (adapter->if_ops.process_int_status)
254 adapter->if_ops.process_int_status(adapter);
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700255 }
256
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) &&
Yogesh Ashok Powarf57c1ed2012-03-13 19:22:37 -0700261 (is_command_pending(adapter) ||
262 !mwifiex_wmm_lists_empty(adapter))) {
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700263 adapter->pm_wakeup_fw_try = true;
264 adapter->if_ops.wakeup(adapter);
265 continue;
266 }
Amitkumar Karwar4daffe32012-04-18 20:08:28 -0700267
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700268 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;
272 } else {
273 /* We have tried to wakeup the card already */
274 if (adapter->pm_wakeup_fw_try)
275 break;
276 if (adapter->ps_state != PS_STATE_AWAKE ||
277 adapter->tx_lock_flag)
278 break;
279
Amitkumar Karwarf931c772012-06-20 19:58:36 -0700280 if ((adapter->scan_processing &&
281 !adapter->scan_delay_cnt) || adapter->data_sent ||
Yogesh Ashok Powarf57c1ed2012-03-13 19:22:37 -0700282 mwifiex_wmm_lists_empty(adapter)) {
283 if (adapter->cmd_sent || adapter->curr_cmd ||
284 (!is_command_pending(adapter)))
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700285 break;
286 }
287 }
288
Amitkumar Karwar4daffe32012-04-18 20:08:28 -0700289 /* 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);
293
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700294 /* Check for Cmd Resp */
295 if (adapter->cmd_resp_received) {
296 adapter->cmd_resp_received = false;
297 mwifiex_process_cmdresp(adapter);
298
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);
303 }
304 }
305
306 /* Check for event */
307 if (adapter->event_received) {
308 adapter->event_received = false;
309 mwifiex_process_event(adapter);
310 }
311
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);
317 }
318
319 /* * The ps_state may have been changed during processing of
320 * Sleep Request event.
321 */
Yogesh Ashok Powarf57c1ed2012-03-13 19:22:37 -0700322 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)
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700326 continue;
327
328 if (!adapter->cmd_sent && !adapter->curr_cmd) {
329 if (mwifiex_exec_next_cmd(adapter) == -1) {
330 ret = -1;
331 break;
332 }
333 }
334
Amitkumar Karwar3249ba72012-06-06 21:12:41 -0700335 if ((!adapter->scan_processing || adapter->scan_delay_cnt) &&
336 !adapter->data_sent && !mwifiex_wmm_lists_empty(adapter)) {
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700337 mwifiex_wmm_process_tx(adapter);
338 if (adapter->hs_activated) {
339 adapter->is_hs_configured = false;
340 mwifiex_hs_activated_event
341 (mwifiex_get_priv
342 (adapter, MWIFIEX_BSS_ROLE_ANY),
343 false);
344 }
345 }
346
347 if (adapter->delay_null_pkt && !adapter->cmd_sent &&
Yogesh Ashok Powarf57c1ed2012-03-13 19:22:37 -0700348 !adapter->curr_cmd && !is_command_pending(adapter) &&
349 mwifiex_wmm_lists_empty(adapter)) {
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700350 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;
356 }
357 break;
358 }
359 } while (true);
360
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700361 spin_lock_irqsave(&adapter->main_proc_lock, flags);
Amitkumar Karwar453b0c32013-09-27 10:55:38 -0700362 if ((adapter->int_status) || IS_CARD_RX_RCVD(adapter)) {
363 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
364 goto process_start;
365 }
366
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700367 adapter->mwifiex_processing = false;
368 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
369
370exit_main_proc:
371 if (adapter->hw_status == MWIFIEX_HW_STATUS_CLOSING)
372 mwifiex_shutdown_drv(adapter);
373 return ret;
374}
Bing Zhao601216e2012-11-05 16:59:15 -0800375EXPORT_SYMBOL_GPL(mwifiex_main_process);
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700376
377/*
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700378 * This function frees the adapter structure.
379 *
380 * Additionally, this closes the netlink socket, frees the timers
381 * and private structures.
382 */
383static void mwifiex_free_adapter(struct mwifiex_adapter *adapter)
384{
385 if (!adapter) {
386 pr_err("%s: adapter is NULL\n", __func__);
387 return;
388 }
389
390 mwifiex_unregister(adapter);
391 pr_debug("info: %s: free adapter\n", __func__);
392}
393
394/*
Amitkumar Karwar6b41f942013-07-22 19:17:55 -0700395 * This function cancels all works in the queue and destroys
396 * the main workqueue.
397 */
398static void mwifiex_terminate_workqueue(struct mwifiex_adapter *adapter)
399{
400 flush_workqueue(adapter->workqueue);
401 destroy_workqueue(adapter->workqueue);
402 adapter->workqueue = NULL;
403}
404
405/*
Amitkumar Karwar59a4cc22012-04-09 20:06:57 -0700406 * This function gets firmware and initializes it.
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700407 *
408 * The main initialization steps followed are -
409 * - Download the correct firmware to card
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700410 * - Issue the init commands to firmware
411 */
Amitkumar Karwar59a4cc22012-04-09 20:06:57 -0700412static void mwifiex_fw_dpc(const struct firmware *firmware, void *context)
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700413{
Amitkumar Karwarbec568f2013-11-14 19:10:38 -0800414 int ret;
Amitkumar Karwar59a4cc22012-04-09 20:06:57 -0700415 char fmt[64];
416 struct mwifiex_private *priv;
417 struct mwifiex_adapter *adapter = context;
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700418 struct mwifiex_fw_image fw;
Amitkumar Karwarc3afd992013-07-30 17:18:15 -0700419 struct semaphore *sem = adapter->card_sem;
420 bool init_failed = false;
Amitkumar Karwar68b76e92013-11-14 19:10:37 -0800421 struct wireless_dev *wdev;
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700422
Amitkumar Karwar59a4cc22012-04-09 20:06:57 -0700423 if (!firmware) {
424 dev_err(adapter->dev,
425 "Failed to get firmware %s\n", adapter->fw_name);
Amitkumar Karwar6b41f942013-07-22 19:17:55 -0700426 goto err_dnld_fw;
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700427 }
Amitkumar Karwar59a4cc22012-04-09 20:06:57 -0700428
429 memset(&fw, 0, sizeof(struct mwifiex_fw_image));
430 adapter->firmware = firmware;
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700431 fw.fw_buf = (u8 *) adapter->firmware->data;
432 fw.fw_len = adapter->firmware->size;
433
Amitkumar Karwar4daffe32012-04-18 20:08:28 -0700434 if (adapter->if_ops.dnld_fw)
435 ret = adapter->if_ops.dnld_fw(adapter, &fw);
436 else
437 ret = mwifiex_dnld_fw(adapter, &fw);
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700438 if (ret == -1)
Amitkumar Karwar6b41f942013-07-22 19:17:55 -0700439 goto err_dnld_fw;
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700440
441 dev_notice(adapter->dev, "WLAN FW is active\n");
442
Amitkumar Karwar388ec382013-05-17 17:50:25 -0700443 if (cal_data_cfg) {
444 if ((request_firmware(&adapter->cal_data, cal_data_cfg,
445 adapter->dev)) < 0)
446 dev_err(adapter->dev,
447 "Cal data request_firmware() failed\n");
448 }
449
Daniel Drake232fde02013-07-13 10:57:10 -0400450 /* enable host interrupt after fw dnld is successful */
Amitkumar Karwar6b41f942013-07-22 19:17:55 -0700451 if (adapter->if_ops.enable_int) {
452 if (adapter->if_ops.enable_int(adapter))
453 goto err_dnld_fw;
454 }
Daniel Drake232fde02013-07-13 10:57:10 -0400455
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700456 adapter->init_wait_q_woken = false;
457 ret = mwifiex_init_fw(adapter);
458 if (ret == -1) {
Amitkumar Karwar6b41f942013-07-22 19:17:55 -0700459 goto err_init_fw;
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700460 } else if (!ret) {
461 adapter->hw_status = MWIFIEX_HW_STATUS_READY;
462 goto done;
463 }
464 /* Wait for mwifiex_init to complete */
465 wait_event_interruptible(adapter->init_wait_q,
466 adapter->init_wait_q_woken);
Amitkumar Karwar59a4cc22012-04-09 20:06:57 -0700467 if (adapter->hw_status != MWIFIEX_HW_STATUS_READY)
Amitkumar Karwar6b41f942013-07-22 19:17:55 -0700468 goto err_init_fw;
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700469
Avinash Patild6bffe82012-05-08 18:30:15 -0700470 priv = adapter->priv[MWIFIEX_BSS_ROLE_STA];
471 if (mwifiex_register_cfg80211(adapter)) {
Amitkumar Karwar59a4cc22012-04-09 20:06:57 -0700472 dev_err(adapter->dev, "cannot register with cfg80211\n");
Amitkumar Karward1af2942013-11-14 19:10:39 -0800473 goto err_init_fw;
Amitkumar Karwar59a4cc22012-04-09 20:06:57 -0700474 }
475
476 rtnl_lock();
477 /* Create station interface by default */
Amitkumar Karwar68b76e92013-11-14 19:10:37 -0800478 wdev = mwifiex_add_virtual_intf(adapter->wiphy, "mlan%d",
479 NL80211_IFTYPE_STATION, NULL, NULL);
480 if (IS_ERR(wdev)) {
Amitkumar Karwar59a4cc22012-04-09 20:06:57 -0700481 dev_err(adapter->dev, "cannot create default STA interface\n");
Amitkumar Karwarbec568f2013-11-14 19:10:38 -0800482 rtnl_unlock();
Amitkumar Karwar59a4cc22012-04-09 20:06:57 -0700483 goto err_add_intf;
484 }
485 rtnl_unlock();
486
487 mwifiex_drv_get_driver_version(adapter, fmt, sizeof(fmt) - 1);
488 dev_notice(adapter->dev, "driver_version = %s\n", fmt);
489 goto done;
490
491err_add_intf:
Amitkumar Karwar6b41f942013-07-22 19:17:55 -0700492 wiphy_unregister(adapter->wiphy);
493 wiphy_free(adapter->wiphy);
Amitkumar Karwar59a4cc22012-04-09 20:06:57 -0700494err_init_fw:
Daniel Drake232fde02013-07-13 10:57:10 -0400495 if (adapter->if_ops.disable_int)
496 adapter->if_ops.disable_int(adapter);
Amitkumar Karwar6b41f942013-07-22 19:17:55 -0700497err_dnld_fw:
Amitkumar Karwar59a4cc22012-04-09 20:06:57 -0700498 pr_debug("info: %s: unregister device\n", __func__);
Amitkumar Karwar6b41f942013-07-22 19:17:55 -0700499 if (adapter->if_ops.unregister_dev)
500 adapter->if_ops.unregister_dev(adapter);
501
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;
506
507 if (mwifiex_shutdown_drv(adapter) == -EINPROGRESS)
508 wait_event_interruptible(adapter->init_wait_q,
509 adapter->init_wait_q_woken);
510 }
511 adapter->surprise_removed = true;
512 mwifiex_terminate_workqueue(adapter);
Amitkumar Karwarc3afd992013-07-30 17:18:15 -0700513 init_failed = true;
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700514done:
Amitkumar Karwar388ec382013-05-17 17:50:25 -0700515 if (adapter->cal_data) {
516 release_firmware(adapter->cal_data);
517 adapter->cal_data = NULL;
518 }
Amitkumar Karwarc3afd992013-07-30 17:18:15 -0700519 if (adapter->firmware) {
520 release_firmware(adapter->firmware);
521 adapter->firmware = NULL;
522 }
Amitkumar Karwar59a4cc22012-04-09 20:06:57 -0700523 complete(&adapter->fw_load);
Amitkumar Karwarc3afd992013-07-30 17:18:15 -0700524 if (init_failed)
525 mwifiex_free_adapter(adapter);
526 up(sem);
Amitkumar Karwar59a4cc22012-04-09 20:06:57 -0700527 return;
528}
529
530/*
531 * This function initializes the hardware and gets firmware.
532 */
533static int mwifiex_init_hw_fw(struct mwifiex_adapter *adapter)
534{
535 int ret;
536
537 init_completion(&adapter->fw_load);
538 ret = request_firmware_nowait(THIS_MODULE, 1, adapter->fw_name,
539 adapter->dev, GFP_KERNEL, adapter,
540 mwifiex_fw_dpc);
541 if (ret < 0)
542 dev_err(adapter->dev,
543 "request_firmware_nowait() returned error %d\n", ret);
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700544 return ret;
545}
546
547/*
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700548 * CFG802.11 network device handler for open.
549 *
550 * Starts the data queue.
551 */
552static int
553mwifiex_open(struct net_device *dev)
554{
Avinash Patilbbea3bc2011-12-08 20:41:05 -0800555 netif_tx_start_all_queues(dev);
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700556 return 0;
557}
558
559/*
560 * CFG802.11 network device handler for close.
561 */
562static int
563mwifiex_close(struct net_device *dev)
564{
Amitkumar Karwarf162cac2012-10-19 19:19:16 -0700565 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
566
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;
Amitkumar Karwar75ab7532013-05-17 17:50:20 -0700571 priv->scan_aborting = true;
Amitkumar Karwarf162cac2012-10-19 19:19:16 -0700572 }
573
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700574 return 0;
575}
576
577/*
Stone Piaoe39faa72012-09-25 20:23:32 -0700578 * Add buffer into wmm tx queue and queue work to transmit it.
579 */
580int mwifiex_queue_tx_pkt(struct mwifiex_private *priv, struct sk_buff *skb)
581{
Avinash Patil47411a02012-11-01 18:44:16 -0700582 struct netdev_queue *txq;
583 int index = mwifiex_1d_to_wmm_queue[skb->priority];
584
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);
590 }
591 }
592
Stone Piaoe39faa72012-09-25 20:23:32 -0700593 atomic_inc(&priv->adapter->tx_pending);
Avinash Patil47411a02012-11-01 18:44:16 -0700594 mwifiex_wmm_add_buf_txqueue(priv, skb);
Stone Piaoe39faa72012-09-25 20:23:32 -0700595
596 if (priv->adapter->scan_delay_cnt)
597 atomic_set(&priv->adapter->is_tx_received, true);
598
Stone Piaoe39faa72012-09-25 20:23:32 -0700599 queue_work(priv->adapter->workqueue, &priv->adapter->main_work);
600
601 return 0;
602}
603
604/*
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700605 * CFG802.11 network device handler for data transmission.
606 */
607static int
608mwifiex_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
609{
610 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
Yogesh Ashok Powar270e58e2011-05-03 20:11:46 -0700611 struct sk_buff *new_skb;
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700612 struct mwifiex_txinfo *tx_info;
Avinash Patil47411a02012-11-01 18:44:16 -0700613 struct timeval tv;
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700614
Yogesh Ashok Powar9da9a3b2012-01-11 20:06:11 -0800615 dev_dbg(priv->adapter->dev, "data: %lu BSS(%d-%d): Data <= kernel\n",
Yogesh Ashok Powarf57c1ed2012-03-13 19:22:37 -0700616 jiffies, priv->bss_type, priv->bss_num);
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700617
618 if (priv->adapter->surprise_removed) {
Christoph Fritzb53575e2011-05-08 22:50:09 +0200619 kfree_skb(skb);
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700620 priv->stats.tx_dropped++;
621 return 0;
622 }
623 if (!skb->len || (skb->len > ETH_FRAME_LEN)) {
624 dev_err(priv->adapter->dev, "Tx: bad skb len %d\n", skb->len);
Christoph Fritzb53575e2011-05-08 22:50:09 +0200625 kfree_skb(skb);
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700626 priv->stats.tx_dropped++;
627 return 0;
628 }
629 if (skb_headroom(skb) < MWIFIEX_MIN_DATA_HEADER_LEN) {
630 dev_dbg(priv->adapter->dev,
631 "data: Tx: insufficient skb headroom %d\n",
Yogesh Ashok Powarf57c1ed2012-03-13 19:22:37 -0700632 skb_headroom(skb));
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700633 /* Insufficient skb headroom - allocate a new skb */
634 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");
Christoph Fritzb53575e2011-05-08 22:50:09 +0200638 kfree_skb(skb);
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700639 priv->stats.tx_dropped++;
640 return 0;
641 }
642 kfree_skb(skb);
643 skb = new_skb;
644 dev_dbg(priv->adapter->dev, "info: new skb headroomd %d\n",
Yogesh Ashok Powarf57c1ed2012-03-13 19:22:37 -0700645 skb_headroom(skb));
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700646 }
647
648 tx_info = MWIFIEX_SKB_TXCB(skb);
Yogesh Ashok Powar9da9a3b2012-01-11 20:06:11 -0800649 tx_info->bss_num = priv->bss_num;
650 tx_info->bss_type = priv->bss_type;
Ujjal Roya1ed4842013-12-02 23:17:55 -0800651 tx_info->pkt_len = skb->len;
Avinash Patil47411a02012-11-01 18:44:16 -0700652
653 /* Record the current time the packet was queued; used to
654 * determine the amount of time the packet was queued in
655 * the driver before it was sent to the firmware.
656 * The delay is then sent along with the packet to the
657 * firmware for aggregate delay calculation for stats and
658 * MSDU lifetime expiry.
659 */
660 do_gettimeofday(&tv);
661 skb->tstamp = timeval_to_ktime(tv);
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700662
Stone Piaoe39faa72012-09-25 20:23:32 -0700663 mwifiex_queue_tx_pkt(priv, skb);
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700664
665 return 0;
666}
667
668/*
669 * CFG802.11 network device handler for setting MAC address.
670 */
671static int
672mwifiex_set_mac_address(struct net_device *dev, void *addr)
673{
674 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
Amitkumar Karwara5ffddb2011-06-20 15:21:48 -0700675 struct sockaddr *hw_addr = addr;
Yogesh Ashok Powar270e58e2011-05-03 20:11:46 -0700676 int ret;
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700677
678 memcpy(priv->curr_addr, hw_addr->sa_data, ETH_ALEN);
679
Amitkumar Karwar600f5d92011-04-13 17:27:06 -0700680 /* Send request to firmware */
681 ret = mwifiex_send_cmd_sync(priv, HostCmd_CMD_802_11_MAC_ADDRESS,
682 HostCmd_ACT_GEN_SET, 0, NULL);
683
684 if (!ret)
685 memcpy(priv->netdev->dev_addr, priv->curr_addr, ETH_ALEN);
686 else
Yogesh Ashok Powarf57c1ed2012-03-13 19:22:37 -0700687 dev_err(priv->adapter->dev,
688 "set mac address failed: ret=%d\n", ret);
Amitkumar Karwar600f5d92011-04-13 17:27:06 -0700689
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700690 memcpy(dev->dev_addr, priv->curr_addr, ETH_ALEN);
691
Amitkumar Karwar600f5d92011-04-13 17:27:06 -0700692 return ret;
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700693}
694
695/*
696 * CFG802.11 network device handler for setting multicast list.
697 */
698static void mwifiex_set_multicast_list(struct net_device *dev)
699{
700 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
Amitkumar Karwar600f5d92011-04-13 17:27:06 -0700701 struct mwifiex_multicast_list mcast_list;
702
703 if (dev->flags & IFF_PROMISC) {
704 mcast_list.mode = MWIFIEX_PROMISC_MODE;
705 } else if (dev->flags & IFF_ALLMULTI ||
706 netdev_mc_count(dev) > MWIFIEX_MAX_MULTICAST_LIST_SIZE) {
707 mcast_list.mode = MWIFIEX_ALL_MULTI_MODE;
708 } else {
709 mcast_list.mode = MWIFIEX_MULTICAST_MODE;
Daniel Drake6390d882013-06-14 15:24:24 -0400710 mcast_list.num_multicast_addr =
711 mwifiex_copy_mcast_addr(&mcast_list, dev);
Amitkumar Karwar600f5d92011-04-13 17:27:06 -0700712 }
713 mwifiex_request_set_multicast_list(priv, &mcast_list);
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700714}
715
716/*
717 * CFG802.11 network device handler for transmission timeout.
718 */
719static void
720mwifiex_tx_timeout(struct net_device *dev)
721{
722 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
723
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700724 priv->num_tx_timeout++;
Ashok Nagarajan8908c7d2013-03-08 10:58:45 -0800725 priv->tx_timeout_cnt++;
726 dev_err(priv->adapter->dev,
727 "%lu : Tx timeout(#%d), bss_type-num = %d-%d\n",
728 jiffies, priv->tx_timeout_cnt, priv->bss_type, priv->bss_num);
729 mwifiex_set_trans_start(dev);
730
731 if (priv->tx_timeout_cnt > TX_TIMEOUT_THRESHOLD &&
732 priv->adapter->if_ops.card_reset) {
733 dev_err(priv->adapter->dev,
734 "tx_timeout_cnt exceeds threshold. Triggering card reset!\n");
735 priv->adapter->if_ops.card_reset(priv->adapter);
736 }
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700737}
738
739/*
740 * CFG802.11 network device handler for statistics retrieval.
741 */
742static struct net_device_stats *mwifiex_get_stats(struct net_device *dev)
743{
744 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
745
746 return &priv->stats;
747}
748
Avinash Patil47411a02012-11-01 18:44:16 -0700749static u16
750mwifiex_netdev_select_wmm_queue(struct net_device *dev, struct sk_buff *skb)
751{
752 skb->priority = cfg80211_classify8021d(skb);
753 return mwifiex_1d_to_wmm_queue[skb->priority];
754}
755
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700756/* Network device handlers */
757static const struct net_device_ops mwifiex_netdev_ops = {
758 .ndo_open = mwifiex_open,
759 .ndo_stop = mwifiex_close,
760 .ndo_start_xmit = mwifiex_hard_start_xmit,
761 .ndo_set_mac_address = mwifiex_set_mac_address,
762 .ndo_tx_timeout = mwifiex_tx_timeout,
763 .ndo_get_stats = mwifiex_get_stats,
Jiri Pirkoafc4b132011-08-16 06:29:01 +0000764 .ndo_set_rx_mode = mwifiex_set_multicast_list,
Avinash Patil47411a02012-11-01 18:44:16 -0700765 .ndo_select_queue = mwifiex_netdev_select_wmm_queue,
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700766};
767
768/*
769 * This function initializes the private structure parameters.
770 *
771 * The following wait queues are initialized -
772 * - IOCTL wait queue
773 * - Command wait queue
774 * - Statistics wait queue
775 *
776 * ...and the following default parameters are set -
777 * - Current key index : Set to 0
778 * - Rate index : Set to auto
779 * - Media connected : Set to disconnected
780 * - Adhoc link sensed : Set to false
781 * - Nick name : Set to null
782 * - Number of Tx timeout : Set to 0
783 * - Device address : Set to current address
784 *
785 * In addition, the CFG80211 work queue is also created.
786 */
Yogesh Ashok Powar93a1df42011-09-26 20:37:26 -0700787void mwifiex_init_priv_params(struct mwifiex_private *priv,
788 struct net_device *dev)
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700789{
790 dev->netdev_ops = &mwifiex_netdev_ops;
Amitkumar Karwarf16fdc92013-05-06 19:46:54 -0700791 dev->destructor = free_netdev;
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700792 /* Initialize private structure */
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700793 priv->current_key_index = 0;
794 priv->media_connected = false;
795 memset(&priv->nick_name, 0, sizeof(priv->nick_name));
Avinash Patilede98bf2012-05-08 18:30:28 -0700796 memset(priv->mgmt_ie, 0,
797 sizeof(struct mwifiex_ie) * MAX_MGMT_IE_INDEX);
Avinash Patilf31acab2012-05-08 18:30:29 -0700798 priv->beacon_idx = MWIFIEX_AUTO_IDX_MASK;
799 priv->proberesp_idx = MWIFIEX_AUTO_IDX_MASK;
800 priv->assocresp_idx = MWIFIEX_AUTO_IDX_MASK;
801 priv->rsn_idx = MWIFIEX_AUTO_IDX_MASK;
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700802 priv->num_tx_timeout = 0;
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700803 memcpy(dev->dev_addr, priv->curr_addr, ETH_ALEN);
804}
805
806/*
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700807 * This function check if command is pending.
808 */
809int is_command_pending(struct mwifiex_adapter *adapter)
810{
811 unsigned long flags;
812 int is_cmd_pend_q_empty;
813
814 spin_lock_irqsave(&adapter->cmd_pending_q_lock, flags);
815 is_cmd_pend_q_empty = list_empty(&adapter->cmd_pending_q);
816 spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, flags);
817
818 return !is_cmd_pend_q_empty;
819}
820
821/*
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700822 * This is the main work queue function.
823 *
824 * It handles the main process, which in turn handles the complete
825 * driver operations.
826 */
827static void mwifiex_main_work_queue(struct work_struct *work)
828{
829 struct mwifiex_adapter *adapter =
830 container_of(work, struct mwifiex_adapter, main_work);
831
832 if (adapter->surprise_removed)
833 return;
834 mwifiex_main_process(adapter);
835}
836
837/*
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700838 * This function adds the card.
839 *
840 * This function follows the following major steps to set up the device -
841 * - Initialize software. This includes probing the card, registering
842 * the interface operations table, and allocating/initializing the
843 * adapter structure
844 * - Set up the netlink socket
845 * - Create and start the main work queue
846 * - Register the device
847 * - Initialize firmware and hardware
848 * - Add logical interfaces
849 */
850int
851mwifiex_add_card(void *card, struct semaphore *sem,
Amitkumar Karward930fae2011-10-11 17:41:21 -0700852 struct mwifiex_if_ops *if_ops, u8 iface_type)
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700853{
Amitkumar Karwar2be78592011-04-15 20:50:42 -0700854 struct mwifiex_adapter *adapter;
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700855
856 if (down_interruptible(sem))
857 goto exit_sem_err;
858
Yogesh Ashok Powar93a1df42011-09-26 20:37:26 -0700859 if (mwifiex_register(card, if_ops, (void **)&adapter)) {
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700860 pr_err("%s: software init failed\n", __func__);
861 goto err_init_sw;
862 }
863
Amitkumar Karward930fae2011-10-11 17:41:21 -0700864 adapter->iface_type = iface_type;
Amitkumar Karwar6b41f942013-07-22 19:17:55 -0700865 adapter->card_sem = sem;
Amitkumar Karward930fae2011-10-11 17:41:21 -0700866
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700867 adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700868 adapter->surprise_removed = false;
869 init_waitqueue_head(&adapter->init_wait_q);
870 adapter->is_suspended = false;
871 adapter->hs_activated = false;
872 init_waitqueue_head(&adapter->hs_activate_wait_q);
Amitkumar Karwar600f5d92011-04-13 17:27:06 -0700873 adapter->cmd_wait_q_required = false;
874 init_waitqueue_head(&adapter->cmd_wait_q.wait);
Amitkumar Karwar600f5d92011-04-13 17:27:06 -0700875 adapter->cmd_wait_q.status = 0;
Amitkumar Karwarefaaa8b2011-10-12 20:28:06 -0700876 adapter->scan_wait_q_woken = false;
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700877
Amitkumar Karwar448a71c2013-10-11 18:33:04 -0700878 adapter->workqueue =
879 alloc_workqueue("MWIFIEX_WORK_QUEUE",
880 WQ_HIGHPRI | WQ_MEM_RECLAIM | WQ_UNBOUND, 1);
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700881 if (!adapter->workqueue)
882 goto err_kmalloc;
883
884 INIT_WORK(&adapter->main_work, mwifiex_main_work_queue);
885
886 /* Register the device. Fill up the private data structure with relevant
Daniel Drake232fde02013-07-13 10:57:10 -0400887 information from the card. */
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700888 if (adapter->if_ops.register_dev(adapter)) {
889 pr_err("%s: failed to register mwifiex device\n", __func__);
890 goto err_registerdev;
891 }
892
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700893 if (mwifiex_init_hw_fw(adapter)) {
894 pr_err("%s: firmware init failed\n", __func__);
895 goto err_init_fw;
896 }
Amitkumar Karwar2be78592011-04-15 20:50:42 -0700897
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700898 return 0;
899
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700900err_init_fw:
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700901 pr_debug("info: %s: unregister device\n", __func__);
Amitkumar Karwar4daffe32012-04-18 20:08:28 -0700902 if (adapter->if_ops.unregister_dev)
903 adapter->if_ops.unregister_dev(adapter);
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700904 if ((adapter->hw_status == MWIFIEX_HW_STATUS_FW_READY) ||
905 (adapter->hw_status == MWIFIEX_HW_STATUS_READY)) {
906 pr_debug("info: %s: shutdown mwifiex\n", __func__);
907 adapter->init_wait_q_woken = false;
Yogesh Ashok Powar636c4592011-04-15 20:50:40 -0700908
909 if (mwifiex_shutdown_drv(adapter) == -EINPROGRESS)
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700910 wait_event_interruptible(adapter->init_wait_q,
911 adapter->init_wait_q_woken);
912 }
Amitkumar Karwar6b41f942013-07-22 19:17:55 -0700913err_registerdev:
914 adapter->surprise_removed = true;
915 mwifiex_terminate_workqueue(adapter);
916err_kmalloc:
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700917 mwifiex_free_adapter(adapter);
918
919err_init_sw:
920 up(sem);
921
922exit_sem_err:
923 return -1;
924}
925EXPORT_SYMBOL_GPL(mwifiex_add_card);
926
927/*
928 * This function removes the card.
929 *
930 * This function follows the following major steps to remove the device -
931 * - Stop data traffic
932 * - Shutdown firmware
933 * - Remove the logical interfaces
934 * - Terminate the work queue
935 * - Unregister the device
936 * - Free the adapter structure
937 */
938int mwifiex_remove_card(struct mwifiex_adapter *adapter, struct semaphore *sem)
939{
940 struct mwifiex_private *priv = NULL;
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700941 int i;
942
943 if (down_interruptible(sem))
944 goto exit_sem_err;
945
946 if (!adapter)
947 goto exit_remove;
948
Daniel Drake232fde02013-07-13 10:57:10 -0400949 /* We can no longer handle interrupts once we start doing the teardown
950 * below. */
951 if (adapter->if_ops.disable_int)
952 adapter->if_ops.disable_int(adapter);
953
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700954 adapter->surprise_removed = true;
955
956 /* Stop data */
957 for (i = 0; i < adapter->priv_num; i++) {
958 priv = adapter->priv[i];
Yogesh Ashok Powar93a1df42011-09-26 20:37:26 -0700959 if (priv && priv->netdev) {
Avinash Patil47411a02012-11-01 18:44:16 -0700960 mwifiex_stop_net_dev_queue(priv->netdev, adapter);
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700961 if (netif_carrier_ok(priv->netdev))
962 netif_carrier_off(priv->netdev);
963 }
964 }
965
966 dev_dbg(adapter->dev, "cmd: calling mwifiex_shutdown_drv...\n");
967 adapter->init_wait_q_woken = false;
Yogesh Ashok Powar636c4592011-04-15 20:50:40 -0700968
969 if (mwifiex_shutdown_drv(adapter) == -EINPROGRESS)
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700970 wait_event_interruptible(adapter->init_wait_q,
971 adapter->init_wait_q_woken);
972 dev_dbg(adapter->dev, "cmd: mwifiex_shutdown_drv done\n");
973 if (atomic_read(&adapter->rx_pending) ||
974 atomic_read(&adapter->tx_pending) ||
Amitkumar Karwar600f5d92011-04-13 17:27:06 -0700975 atomic_read(&adapter->cmd_pending)) {
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700976 dev_err(adapter->dev, "rx_pending=%d, tx_pending=%d, "
Amitkumar Karwar600f5d92011-04-13 17:27:06 -0700977 "cmd_pending=%d\n",
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700978 atomic_read(&adapter->rx_pending),
979 atomic_read(&adapter->tx_pending),
Amitkumar Karwar600f5d92011-04-13 17:27:06 -0700980 atomic_read(&adapter->cmd_pending));
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700981 }
982
Yogesh Ashok Powar93a1df42011-09-26 20:37:26 -0700983 for (i = 0; i < adapter->priv_num; i++) {
984 priv = adapter->priv[i];
985
986 if (!priv)
987 continue;
988
989 rtnl_lock();
Amitkumar Karwar2da8cbf2012-02-03 20:34:02 -0800990 if (priv->wdev && priv->netdev)
Johannes Berg84efbb82012-06-16 00:00:26 +0200991 mwifiex_del_virtual_intf(adapter->wiphy, priv->wdev);
Yogesh Ashok Powar93a1df42011-09-26 20:37:26 -0700992 rtnl_unlock();
993 }
994
Amitkumar Karwarc2868ad2013-12-02 23:17:57 -0800995 wiphy_unregister(adapter->wiphy);
996 wiphy_free(adapter->wiphy);
Avinash Patil64b05e22012-05-08 18:30:13 -0700997
Bing Zhao5e6e3a92011-03-21 18:00:50 -0700998 mwifiex_terminate_workqueue(adapter);
999
1000 /* Unregister device */
1001 dev_dbg(adapter->dev, "info: unregister device\n");
Amitkumar Karwar4daffe32012-04-18 20:08:28 -07001002 if (adapter->if_ops.unregister_dev)
1003 adapter->if_ops.unregister_dev(adapter);
Bing Zhao5e6e3a92011-03-21 18:00:50 -07001004 /* Free adapter structure */
1005 dev_dbg(adapter->dev, "info: free adapter\n");
1006 mwifiex_free_adapter(adapter);
1007
1008exit_remove:
1009 up(sem);
1010exit_sem_err:
1011 return 0;
1012}
1013EXPORT_SYMBOL_GPL(mwifiex_remove_card);
1014
1015/*
1016 * This function initializes the module.
1017 *
1018 * The debug FS is also initialized if configured.
1019 */
1020static int
1021mwifiex_init_module(void)
1022{
1023#ifdef CONFIG_DEBUG_FS
1024 mwifiex_debugfs_init();
1025#endif
1026 return 0;
1027}
1028
1029/*
1030 * This function cleans up the module.
1031 *
1032 * The debug FS is removed if available.
1033 */
1034static void
1035mwifiex_cleanup_module(void)
1036{
1037#ifdef CONFIG_DEBUG_FS
1038 mwifiex_debugfs_remove();
1039#endif
1040}
1041
1042module_init(mwifiex_init_module);
1043module_exit(mwifiex_cleanup_module);
1044
1045MODULE_AUTHOR("Marvell International Ltd.");
1046MODULE_DESCRIPTION("Marvell WiFi-Ex Driver version " VERSION);
1047MODULE_VERSION(VERSION);
1048MODULE_LICENSE("GPL v2");