Commit | Line | Data |
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5e6e3a92 BZ |
1 | /* |
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 | ||
27 | const char driver_version[] = "mwifiex " VERSION " (%s) "; | |
28 | ||
5e6e3a92 BZ |
29 | /* |
30 | * This function registers the device and performs all the necessary | |
31 | * initializations. | |
32 | * | |
33 | * The following initialization operations are performed - | |
34 | * - Allocate adapter structure | |
35 | * - Save interface specific operations table in adapter | |
36 | * - Call interface specific initialization routine | |
37 | * - Allocate private structures | |
38 | * - Set default adapter structure parameters | |
39 | * - Initialize locks | |
40 | * | |
41 | * In case of any errors during inittialization, this function also ensures | |
42 | * proper cleanup before exiting. | |
43 | */ | |
44 | static int mwifiex_register(void *card, struct mwifiex_if_ops *if_ops, | |
287546df | 45 | void **padapter) |
5e6e3a92 | 46 | { |
2be7859f AK |
47 | struct mwifiex_adapter *adapter; |
48 | int i; | |
5e6e3a92 BZ |
49 | |
50 | adapter = kzalloc(sizeof(struct mwifiex_adapter), GFP_KERNEL); | |
5e6e3a92 | 51 | if (!adapter) |
b53575ec | 52 | return -ENOMEM; |
5e6e3a92 | 53 | |
287546df | 54 | *padapter = adapter; |
5e6e3a92 BZ |
55 | adapter->card = card; |
56 | ||
57 | /* Save interface specific operations in adapter */ | |
58 | memmove(&adapter->if_ops, if_ops, sizeof(struct mwifiex_if_ops)); | |
59 | ||
60 | /* card specific initialization has been deferred until now .. */ | |
636c4598 | 61 | if (adapter->if_ops.init_if(adapter)) |
5e6e3a92 BZ |
62 | goto error; |
63 | ||
64 | adapter->priv_num = 0; | |
5e6e3a92 | 65 | |
93a1df48 YAP |
66 | /* Allocate memory for private structure */ |
67 | adapter->priv[0] = kzalloc(sizeof(struct mwifiex_private), | |
68 | GFP_KERNEL); | |
69 | if (!adapter->priv[0]) { | |
70 | dev_err(adapter->dev, "%s: failed to alloc priv[0]\n", | |
71 | __func__); | |
72 | goto error; | |
5e6e3a92 BZ |
73 | } |
74 | ||
93a1df48 YAP |
75 | adapter->priv_num++; |
76 | ||
77 | adapter->priv[0]->adapter = adapter; | |
5e6e3a92 BZ |
78 | if (mwifiex_init_lock_list(adapter)) |
79 | goto error; | |
80 | ||
81 | init_timer(&adapter->cmd_timer); | |
82 | adapter->cmd_timer.function = mwifiex_cmd_timeout_func; | |
83 | adapter->cmd_timer.data = (unsigned long) adapter; | |
84 | ||
5e6e3a92 BZ |
85 | return 0; |
86 | ||
87 | error: | |
88 | dev_dbg(adapter->dev, "info: leave mwifiex_register with error\n"); | |
89 | ||
5e6e3a92 | 90 | mwifiex_free_lock_list(adapter); |
93a1df48 YAP |
91 | |
92 | for (i = 0; i < adapter->priv_num; i++) | |
5e6e3a92 | 93 | kfree(adapter->priv[i]); |
93a1df48 | 94 | |
5e6e3a92 BZ |
95 | kfree(adapter); |
96 | ||
97 | return -1; | |
98 | } | |
99 | ||
100 | /* | |
101 | * This function unregisters the device and performs all the necessary | |
102 | * cleanups. | |
103 | * | |
104 | * The following cleanup operations are performed - | |
105 | * - Free the timers | |
106 | * - Free beacon buffers | |
107 | * - Free private structures | |
108 | * - Free adapter structure | |
109 | */ | |
110 | static int mwifiex_unregister(struct mwifiex_adapter *adapter) | |
111 | { | |
270e58e8 | 112 | s32 i; |
5e6e3a92 BZ |
113 | |
114 | del_timer(&adapter->cmd_timer); | |
115 | ||
116 | /* Free private structures */ | |
117 | for (i = 0; i < adapter->priv_num; i++) { | |
118 | if (adapter->priv[i]) { | |
119 | mwifiex_free_curr_bcn(adapter->priv[i]); | |
120 | kfree(adapter->priv[i]); | |
121 | } | |
122 | } | |
123 | ||
124 | kfree(adapter); | |
125 | return 0; | |
126 | } | |
127 | ||
128 | /* | |
129 | * The main process. | |
130 | * | |
131 | * This function is the main procedure of the driver and handles various driver | |
132 | * operations. It runs in a loop and provides the core functionalities. | |
133 | * | |
134 | * The main responsibilities of this function are - | |
135 | * - Ensure concurrency control | |
136 | * - Handle pending interrupts and call interrupt handlers | |
137 | * - Wake up the card if required | |
138 | * - Handle command responses and call response handlers | |
139 | * - Handle events and call event handlers | |
140 | * - Execute pending commands | |
141 | * - Transmit pending data packets | |
142 | */ | |
143 | int mwifiex_main_process(struct mwifiex_adapter *adapter) | |
144 | { | |
145 | int ret = 0; | |
146 | unsigned long flags; | |
147 | ||
148 | spin_lock_irqsave(&adapter->main_proc_lock, flags); | |
149 | ||
150 | /* Check if already processing */ | |
151 | if (adapter->mwifiex_processing) { | |
152 | spin_unlock_irqrestore(&adapter->main_proc_lock, flags); | |
153 | goto exit_main_proc; | |
154 | } else { | |
155 | adapter->mwifiex_processing = true; | |
156 | spin_unlock_irqrestore(&adapter->main_proc_lock, flags); | |
157 | } | |
158 | process_start: | |
159 | do { | |
160 | if ((adapter->hw_status == MWIFIEX_HW_STATUS_CLOSING) || | |
161 | (adapter->hw_status == MWIFIEX_HW_STATUS_NOT_READY)) | |
162 | break; | |
163 | ||
164 | /* Handle pending interrupt if any */ | |
165 | if (adapter->int_status) { | |
166 | if (adapter->hs_activated) | |
167 | mwifiex_process_hs_config(adapter); | |
168 | adapter->if_ops.process_int_status(adapter); | |
169 | } | |
170 | ||
171 | /* Need to wake up the card ? */ | |
172 | if ((adapter->ps_state == PS_STATE_SLEEP) && | |
173 | (adapter->pm_wakeup_card_req && | |
174 | !adapter->pm_wakeup_fw_try) && | |
175 | (is_command_pending(adapter) | |
176 | || !mwifiex_wmm_lists_empty(adapter))) { | |
177 | adapter->pm_wakeup_fw_try = true; | |
178 | adapter->if_ops.wakeup(adapter); | |
179 | continue; | |
180 | } | |
181 | if (IS_CARD_RX_RCVD(adapter)) { | |
182 | adapter->pm_wakeup_fw_try = false; | |
183 | if (adapter->ps_state == PS_STATE_SLEEP) | |
184 | adapter->ps_state = PS_STATE_AWAKE; | |
185 | } else { | |
186 | /* We have tried to wakeup the card already */ | |
187 | if (adapter->pm_wakeup_fw_try) | |
188 | break; | |
189 | if (adapter->ps_state != PS_STATE_AWAKE || | |
190 | adapter->tx_lock_flag) | |
191 | break; | |
192 | ||
193 | if (adapter->scan_processing || adapter->data_sent | |
194 | || mwifiex_wmm_lists_empty(adapter)) { | |
195 | if (adapter->cmd_sent || adapter->curr_cmd | |
196 | || (!is_command_pending(adapter))) | |
197 | break; | |
198 | } | |
199 | } | |
200 | ||
201 | /* Check for Cmd Resp */ | |
202 | if (adapter->cmd_resp_received) { | |
203 | adapter->cmd_resp_received = false; | |
204 | mwifiex_process_cmdresp(adapter); | |
205 | ||
206 | /* call mwifiex back when init_fw is done */ | |
207 | if (adapter->hw_status == MWIFIEX_HW_STATUS_INIT_DONE) { | |
208 | adapter->hw_status = MWIFIEX_HW_STATUS_READY; | |
209 | mwifiex_init_fw_complete(adapter); | |
210 | } | |
211 | } | |
212 | ||
213 | /* Check for event */ | |
214 | if (adapter->event_received) { | |
215 | adapter->event_received = false; | |
216 | mwifiex_process_event(adapter); | |
217 | } | |
218 | ||
219 | /* Check if we need to confirm Sleep Request | |
220 | received previously */ | |
221 | if (adapter->ps_state == PS_STATE_PRE_SLEEP) { | |
222 | if (!adapter->cmd_sent && !adapter->curr_cmd) | |
223 | mwifiex_check_ps_cond(adapter); | |
224 | } | |
225 | ||
226 | /* * The ps_state may have been changed during processing of | |
227 | * Sleep Request event. | |
228 | */ | |
229 | if ((adapter->ps_state == PS_STATE_SLEEP) | |
230 | || (adapter->ps_state == PS_STATE_PRE_SLEEP) | |
231 | || (adapter->ps_state == PS_STATE_SLEEP_CFM) | |
232 | || adapter->tx_lock_flag) | |
233 | continue; | |
234 | ||
235 | if (!adapter->cmd_sent && !adapter->curr_cmd) { | |
236 | if (mwifiex_exec_next_cmd(adapter) == -1) { | |
237 | ret = -1; | |
238 | break; | |
239 | } | |
240 | } | |
241 | ||
242 | if (!adapter->scan_processing && !adapter->data_sent && | |
243 | !mwifiex_wmm_lists_empty(adapter)) { | |
244 | mwifiex_wmm_process_tx(adapter); | |
245 | if (adapter->hs_activated) { | |
246 | adapter->is_hs_configured = false; | |
247 | mwifiex_hs_activated_event | |
248 | (mwifiex_get_priv | |
249 | (adapter, MWIFIEX_BSS_ROLE_ANY), | |
250 | false); | |
251 | } | |
252 | } | |
253 | ||
254 | if (adapter->delay_null_pkt && !adapter->cmd_sent && | |
255 | !adapter->curr_cmd && !is_command_pending(adapter) | |
256 | && mwifiex_wmm_lists_empty(adapter)) { | |
257 | if (!mwifiex_send_null_packet | |
258 | (mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA), | |
259 | MWIFIEX_TxPD_POWER_MGMT_NULL_PACKET | | |
260 | MWIFIEX_TxPD_POWER_MGMT_LAST_PACKET)) { | |
261 | adapter->delay_null_pkt = false; | |
262 | adapter->ps_state = PS_STATE_SLEEP; | |
263 | } | |
264 | break; | |
265 | } | |
266 | } while (true); | |
267 | ||
268 | if ((adapter->int_status) || IS_CARD_RX_RCVD(adapter)) | |
269 | goto process_start; | |
270 | ||
271 | spin_lock_irqsave(&adapter->main_proc_lock, flags); | |
272 | adapter->mwifiex_processing = false; | |
273 | spin_unlock_irqrestore(&adapter->main_proc_lock, flags); | |
274 | ||
275 | exit_main_proc: | |
276 | if (adapter->hw_status == MWIFIEX_HW_STATUS_CLOSING) | |
277 | mwifiex_shutdown_drv(adapter); | |
278 | return ret; | |
279 | } | |
280 | ||
5e6e3a92 BZ |
281 | /* |
282 | * This function frees the adapter structure. | |
283 | * | |
284 | * Additionally, this closes the netlink socket, frees the timers | |
285 | * and private structures. | |
286 | */ | |
287 | static void mwifiex_free_adapter(struct mwifiex_adapter *adapter) | |
288 | { | |
289 | if (!adapter) { | |
290 | pr_err("%s: adapter is NULL\n", __func__); | |
291 | return; | |
292 | } | |
293 | ||
294 | mwifiex_unregister(adapter); | |
295 | pr_debug("info: %s: free adapter\n", __func__); | |
296 | } | |
297 | ||
298 | /* | |
299 | * This function initializes the hardware and firmware. | |
300 | * | |
301 | * The main initialization steps followed are - | |
302 | * - Download the correct firmware to card | |
303 | * - Allocate and initialize the adapter structure | |
304 | * - Initialize the private structures | |
305 | * - Issue the init commands to firmware | |
306 | */ | |
307 | static int mwifiex_init_hw_fw(struct mwifiex_adapter *adapter) | |
308 | { | |
270e58e8 | 309 | int ret, err; |
5e6e3a92 BZ |
310 | struct mwifiex_fw_image fw; |
311 | ||
312 | memset(&fw, 0, sizeof(struct mwifiex_fw_image)); | |
313 | ||
4a7f5db1 AK |
314 | err = request_firmware(&adapter->firmware, adapter->fw_name, |
315 | adapter->dev); | |
5e6e3a92 BZ |
316 | if (err < 0) { |
317 | dev_err(adapter->dev, "request_firmware() returned" | |
318 | " error code %#x\n", err); | |
319 | ret = -1; | |
320 | goto done; | |
321 | } | |
322 | fw.fw_buf = (u8 *) adapter->firmware->data; | |
323 | fw.fw_len = adapter->firmware->size; | |
324 | ||
325 | ret = mwifiex_dnld_fw(adapter, &fw); | |
326 | if (ret == -1) | |
327 | goto done; | |
328 | ||
329 | dev_notice(adapter->dev, "WLAN FW is active\n"); | |
330 | ||
331 | adapter->init_wait_q_woken = false; | |
332 | ret = mwifiex_init_fw(adapter); | |
333 | if (ret == -1) { | |
334 | goto done; | |
335 | } else if (!ret) { | |
336 | adapter->hw_status = MWIFIEX_HW_STATUS_READY; | |
337 | goto done; | |
338 | } | |
339 | /* Wait for mwifiex_init to complete */ | |
340 | wait_event_interruptible(adapter->init_wait_q, | |
341 | adapter->init_wait_q_woken); | |
342 | if (adapter->hw_status != MWIFIEX_HW_STATUS_READY) { | |
343 | ret = -1; | |
344 | goto done; | |
345 | } | |
346 | ret = 0; | |
347 | ||
348 | done: | |
349 | if (adapter->firmware) | |
350 | release_firmware(adapter->firmware); | |
351 | if (ret) | |
352 | ret = -1; | |
353 | return ret; | |
354 | } | |
355 | ||
356 | /* | |
357 | * This function fills a driver buffer. | |
358 | * | |
359 | * The function associates a given SKB with the provided driver buffer | |
360 | * and also updates some of the SKB parameters, including IP header, | |
361 | * priority and timestamp. | |
362 | */ | |
363 | static void | |
364 | mwifiex_fill_buffer(struct sk_buff *skb) | |
365 | { | |
270e58e8 | 366 | struct ethhdr *eth; |
5e6e3a92 BZ |
367 | struct iphdr *iph; |
368 | struct timeval tv; | |
369 | u8 tid = 0; | |
370 | ||
371 | eth = (struct ethhdr *) skb->data; | |
372 | switch (eth->h_proto) { | |
373 | case __constant_htons(ETH_P_IP): | |
374 | iph = ip_hdr(skb); | |
375 | tid = IPTOS_PREC(iph->tos); | |
376 | pr_debug("data: packet type ETH_P_IP: %04x, tid=%#x prio=%#x\n", | |
377 | eth->h_proto, tid, skb->priority); | |
378 | break; | |
379 | case __constant_htons(ETH_P_ARP): | |
380 | pr_debug("data: ARP packet: %04x\n", eth->h_proto); | |
381 | default: | |
382 | break; | |
383 | } | |
384 | /* Offset for TOS field in the IP header */ | |
385 | #define IPTOS_OFFSET 5 | |
386 | tid = (tid >> IPTOS_OFFSET); | |
387 | skb->priority = tid; | |
388 | /* Record the current time the packet was queued; used to | |
389 | determine the amount of time the packet was queued in | |
390 | the driver before it was sent to the firmware. | |
391 | The delay is then sent along with the packet to the | |
392 | firmware for aggregate delay calculation for stats and | |
393 | MSDU lifetime expiry. | |
394 | */ | |
395 | do_gettimeofday(&tv); | |
396 | skb->tstamp = timeval_to_ktime(tv); | |
5e6e3a92 BZ |
397 | } |
398 | ||
399 | /* | |
400 | * CFG802.11 network device handler for open. | |
401 | * | |
402 | * Starts the data queue. | |
403 | */ | |
404 | static int | |
405 | mwifiex_open(struct net_device *dev) | |
406 | { | |
407 | netif_start_queue(dev); | |
408 | return 0; | |
409 | } | |
410 | ||
411 | /* | |
412 | * CFG802.11 network device handler for close. | |
413 | */ | |
414 | static int | |
415 | mwifiex_close(struct net_device *dev) | |
416 | { | |
417 | return 0; | |
418 | } | |
419 | ||
420 | /* | |
421 | * CFG802.11 network device handler for data transmission. | |
422 | */ | |
423 | static int | |
424 | mwifiex_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
425 | { | |
426 | struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev); | |
270e58e8 | 427 | struct sk_buff *new_skb; |
5e6e3a92 BZ |
428 | struct mwifiex_txinfo *tx_info; |
429 | ||
430 | dev_dbg(priv->adapter->dev, "data: %lu BSS(%d): Data <= kernel\n", | |
431 | jiffies, priv->bss_index); | |
432 | ||
433 | if (priv->adapter->surprise_removed) { | |
b53575ec | 434 | kfree_skb(skb); |
5e6e3a92 BZ |
435 | priv->stats.tx_dropped++; |
436 | return 0; | |
437 | } | |
438 | if (!skb->len || (skb->len > ETH_FRAME_LEN)) { | |
439 | dev_err(priv->adapter->dev, "Tx: bad skb len %d\n", skb->len); | |
b53575ec | 440 | kfree_skb(skb); |
5e6e3a92 BZ |
441 | priv->stats.tx_dropped++; |
442 | return 0; | |
443 | } | |
444 | if (skb_headroom(skb) < MWIFIEX_MIN_DATA_HEADER_LEN) { | |
445 | dev_dbg(priv->adapter->dev, | |
446 | "data: Tx: insufficient skb headroom %d\n", | |
447 | skb_headroom(skb)); | |
448 | /* Insufficient skb headroom - allocate a new skb */ | |
449 | new_skb = | |
450 | skb_realloc_headroom(skb, MWIFIEX_MIN_DATA_HEADER_LEN); | |
451 | if (unlikely(!new_skb)) { | |
452 | dev_err(priv->adapter->dev, "Tx: cannot alloca new_skb\n"); | |
b53575ec | 453 | kfree_skb(skb); |
5e6e3a92 BZ |
454 | priv->stats.tx_dropped++; |
455 | return 0; | |
456 | } | |
457 | kfree_skb(skb); | |
458 | skb = new_skb; | |
459 | dev_dbg(priv->adapter->dev, "info: new skb headroomd %d\n", | |
460 | skb_headroom(skb)); | |
461 | } | |
462 | ||
463 | tx_info = MWIFIEX_SKB_TXCB(skb); | |
464 | tx_info->bss_index = priv->bss_index; | |
465 | mwifiex_fill_buffer(skb); | |
466 | ||
467 | mwifiex_wmm_add_buf_txqueue(priv->adapter, skb); | |
468 | atomic_inc(&priv->adapter->tx_pending); | |
469 | ||
470 | if (atomic_read(&priv->adapter->tx_pending) >= MAX_TX_PENDING) { | |
471 | netif_stop_queue(priv->netdev); | |
472 | dev->trans_start = jiffies; | |
473 | } | |
474 | ||
475 | queue_work(priv->adapter->workqueue, &priv->adapter->main_work); | |
476 | ||
477 | return 0; | |
478 | } | |
479 | ||
480 | /* | |
481 | * CFG802.11 network device handler for setting MAC address. | |
482 | */ | |
483 | static int | |
484 | mwifiex_set_mac_address(struct net_device *dev, void *addr) | |
485 | { | |
486 | struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev); | |
a5ffddb7 | 487 | struct sockaddr *hw_addr = addr; |
270e58e8 | 488 | int ret; |
5e6e3a92 BZ |
489 | |
490 | memcpy(priv->curr_addr, hw_addr->sa_data, ETH_ALEN); | |
491 | ||
600f5d90 AK |
492 | /* Send request to firmware */ |
493 | ret = mwifiex_send_cmd_sync(priv, HostCmd_CMD_802_11_MAC_ADDRESS, | |
494 | HostCmd_ACT_GEN_SET, 0, NULL); | |
495 | ||
496 | if (!ret) | |
497 | memcpy(priv->netdev->dev_addr, priv->curr_addr, ETH_ALEN); | |
498 | else | |
499 | dev_err(priv->adapter->dev, "set mac address failed: ret=%d" | |
500 | "\n", ret); | |
501 | ||
5e6e3a92 BZ |
502 | memcpy(dev->dev_addr, priv->curr_addr, ETH_ALEN); |
503 | ||
600f5d90 | 504 | return ret; |
5e6e3a92 BZ |
505 | } |
506 | ||
507 | /* | |
508 | * CFG802.11 network device handler for setting multicast list. | |
509 | */ | |
510 | static void mwifiex_set_multicast_list(struct net_device *dev) | |
511 | { | |
512 | struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev); | |
600f5d90 AK |
513 | struct mwifiex_multicast_list mcast_list; |
514 | ||
515 | if (dev->flags & IFF_PROMISC) { | |
516 | mcast_list.mode = MWIFIEX_PROMISC_MODE; | |
517 | } else if (dev->flags & IFF_ALLMULTI || | |
518 | netdev_mc_count(dev) > MWIFIEX_MAX_MULTICAST_LIST_SIZE) { | |
519 | mcast_list.mode = MWIFIEX_ALL_MULTI_MODE; | |
520 | } else { | |
521 | mcast_list.mode = MWIFIEX_MULTICAST_MODE; | |
522 | if (netdev_mc_count(dev)) | |
523 | mcast_list.num_multicast_addr = | |
524 | mwifiex_copy_mcast_addr(&mcast_list, dev); | |
525 | } | |
526 | mwifiex_request_set_multicast_list(priv, &mcast_list); | |
5e6e3a92 BZ |
527 | } |
528 | ||
529 | /* | |
530 | * CFG802.11 network device handler for transmission timeout. | |
531 | */ | |
532 | static void | |
533 | mwifiex_tx_timeout(struct net_device *dev) | |
534 | { | |
535 | struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev); | |
536 | ||
537 | dev_err(priv->adapter->dev, "%lu : Tx timeout, bss_index=%d\n", | |
538 | jiffies, priv->bss_index); | |
539 | dev->trans_start = jiffies; | |
540 | priv->num_tx_timeout++; | |
541 | } | |
542 | ||
543 | /* | |
544 | * CFG802.11 network device handler for statistics retrieval. | |
545 | */ | |
546 | static struct net_device_stats *mwifiex_get_stats(struct net_device *dev) | |
547 | { | |
548 | struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev); | |
549 | ||
550 | return &priv->stats; | |
551 | } | |
552 | ||
553 | /* Network device handlers */ | |
554 | static const struct net_device_ops mwifiex_netdev_ops = { | |
555 | .ndo_open = mwifiex_open, | |
556 | .ndo_stop = mwifiex_close, | |
557 | .ndo_start_xmit = mwifiex_hard_start_xmit, | |
558 | .ndo_set_mac_address = mwifiex_set_mac_address, | |
559 | .ndo_tx_timeout = mwifiex_tx_timeout, | |
560 | .ndo_get_stats = mwifiex_get_stats, | |
561 | .ndo_set_multicast_list = mwifiex_set_multicast_list, | |
562 | }; | |
563 | ||
564 | /* | |
565 | * This function initializes the private structure parameters. | |
566 | * | |
567 | * The following wait queues are initialized - | |
568 | * - IOCTL wait queue | |
569 | * - Command wait queue | |
570 | * - Statistics wait queue | |
571 | * | |
572 | * ...and the following default parameters are set - | |
573 | * - Current key index : Set to 0 | |
574 | * - Rate index : Set to auto | |
575 | * - Media connected : Set to disconnected | |
576 | * - Adhoc link sensed : Set to false | |
577 | * - Nick name : Set to null | |
578 | * - Number of Tx timeout : Set to 0 | |
579 | * - Device address : Set to current address | |
580 | * | |
581 | * In addition, the CFG80211 work queue is also created. | |
582 | */ | |
93a1df48 YAP |
583 | void mwifiex_init_priv_params(struct mwifiex_private *priv, |
584 | struct net_device *dev) | |
5e6e3a92 BZ |
585 | { |
586 | dev->netdev_ops = &mwifiex_netdev_ops; | |
587 | /* Initialize private structure */ | |
5e6e3a92 BZ |
588 | priv->current_key_index = 0; |
589 | priv->media_connected = false; | |
590 | memset(&priv->nick_name, 0, sizeof(priv->nick_name)); | |
591 | priv->num_tx_timeout = 0; | |
592 | priv->workqueue = create_singlethread_workqueue("cfg80211_wq"); | |
593 | INIT_WORK(&priv->cfg_workqueue, mwifiex_cfg80211_results); | |
594 | memcpy(dev->dev_addr, priv->curr_addr, ETH_ALEN); | |
595 | } | |
596 | ||
5e6e3a92 BZ |
597 | /* |
598 | * This function check if command is pending. | |
599 | */ | |
600 | int is_command_pending(struct mwifiex_adapter *adapter) | |
601 | { | |
602 | unsigned long flags; | |
603 | int is_cmd_pend_q_empty; | |
604 | ||
605 | spin_lock_irqsave(&adapter->cmd_pending_q_lock, flags); | |
606 | is_cmd_pend_q_empty = list_empty(&adapter->cmd_pending_q); | |
607 | spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, flags); | |
608 | ||
609 | return !is_cmd_pend_q_empty; | |
610 | } | |
611 | ||
612 | /* | |
613 | * This function returns the correct private structure pointer based | |
614 | * upon the BSS number. | |
615 | */ | |
616 | struct mwifiex_private * | |
617 | mwifiex_bss_index_to_priv(struct mwifiex_adapter *adapter, u8 bss_index) | |
618 | { | |
619 | if (!adapter || (bss_index >= adapter->priv_num)) | |
620 | return NULL; | |
621 | return adapter->priv[bss_index]; | |
622 | } | |
623 | ||
624 | /* | |
625 | * This is the main work queue function. | |
626 | * | |
627 | * It handles the main process, which in turn handles the complete | |
628 | * driver operations. | |
629 | */ | |
630 | static void mwifiex_main_work_queue(struct work_struct *work) | |
631 | { | |
632 | struct mwifiex_adapter *adapter = | |
633 | container_of(work, struct mwifiex_adapter, main_work); | |
634 | ||
635 | if (adapter->surprise_removed) | |
636 | return; | |
637 | mwifiex_main_process(adapter); | |
638 | } | |
639 | ||
640 | /* | |
641 | * This function cancels all works in the queue and destroys | |
642 | * the main workqueue. | |
643 | */ | |
644 | static void | |
645 | mwifiex_terminate_workqueue(struct mwifiex_adapter *adapter) | |
646 | { | |
647 | flush_workqueue(adapter->workqueue); | |
648 | destroy_workqueue(adapter->workqueue); | |
649 | adapter->workqueue = NULL; | |
650 | } | |
651 | ||
652 | /* | |
653 | * This function adds the card. | |
654 | * | |
655 | * This function follows the following major steps to set up the device - | |
656 | * - Initialize software. This includes probing the card, registering | |
657 | * the interface operations table, and allocating/initializing the | |
658 | * adapter structure | |
659 | * - Set up the netlink socket | |
660 | * - Create and start the main work queue | |
661 | * - Register the device | |
662 | * - Initialize firmware and hardware | |
663 | * - Add logical interfaces | |
664 | */ | |
665 | int | |
666 | mwifiex_add_card(void *card, struct semaphore *sem, | |
667 | struct mwifiex_if_ops *if_ops) | |
668 | { | |
2be7859f | 669 | struct mwifiex_adapter *adapter; |
5674fbb7 | 670 | char fmt[64]; |
93a1df48 | 671 | struct mwifiex_private *priv; |
5e6e3a92 BZ |
672 | |
673 | if (down_interruptible(sem)) | |
674 | goto exit_sem_err; | |
675 | ||
93a1df48 | 676 | if (mwifiex_register(card, if_ops, (void **)&adapter)) { |
5e6e3a92 BZ |
677 | pr_err("%s: software init failed\n", __func__); |
678 | goto err_init_sw; | |
679 | } | |
680 | ||
5e6e3a92 | 681 | adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING; |
5e6e3a92 BZ |
682 | adapter->surprise_removed = false; |
683 | init_waitqueue_head(&adapter->init_wait_q); | |
684 | adapter->is_suspended = false; | |
685 | adapter->hs_activated = false; | |
686 | init_waitqueue_head(&adapter->hs_activate_wait_q); | |
600f5d90 AK |
687 | adapter->cmd_wait_q_required = false; |
688 | init_waitqueue_head(&adapter->cmd_wait_q.wait); | |
689 | adapter->cmd_wait_q.condition = false; | |
690 | adapter->cmd_wait_q.status = 0; | |
5e6e3a92 | 691 | |
5e6e3a92 BZ |
692 | adapter->workqueue = create_workqueue("MWIFIEX_WORK_QUEUE"); |
693 | if (!adapter->workqueue) | |
694 | goto err_kmalloc; | |
695 | ||
696 | INIT_WORK(&adapter->main_work, mwifiex_main_work_queue); | |
697 | ||
698 | /* Register the device. Fill up the private data structure with relevant | |
699 | information from the card and request for the required IRQ. */ | |
700 | if (adapter->if_ops.register_dev(adapter)) { | |
701 | pr_err("%s: failed to register mwifiex device\n", __func__); | |
702 | goto err_registerdev; | |
703 | } | |
704 | ||
5e6e3a92 BZ |
705 | if (mwifiex_init_hw_fw(adapter)) { |
706 | pr_err("%s: firmware init failed\n", __func__); | |
707 | goto err_init_fw; | |
708 | } | |
2be7859f | 709 | |
93a1df48 YAP |
710 | priv = adapter->priv[0]; |
711 | ||
712 | if (mwifiex_register_cfg80211(priv) != 0) { | |
713 | dev_err(adapter->dev, "cannot register netdevice" | |
714 | " with cfg80211\n"); | |
715 | goto err_init_fw; | |
716 | } | |
717 | ||
718 | rtnl_lock(); | |
719 | /* Create station interface by default */ | |
720 | if (!mwifiex_add_virtual_intf(priv->wdev->wiphy, "mlan%d", | |
721 | NL80211_IFTYPE_STATION, NULL, NULL)) { | |
722 | rtnl_unlock(); | |
723 | dev_err(adapter->dev, "cannot create default station" | |
724 | " interface\n"); | |
725 | goto err_add_intf; | |
5e6e3a92 | 726 | } |
5e6e3a92 | 727 | |
93a1df48 YAP |
728 | rtnl_unlock(); |
729 | ||
5e6e3a92 BZ |
730 | up(sem); |
731 | ||
5674fbb7 AK |
732 | mwifiex_drv_get_driver_version(adapter, fmt, sizeof(fmt) - 1); |
733 | dev_notice(adapter->dev, "driver_version = %s\n", fmt); | |
734 | ||
5e6e3a92 BZ |
735 | return 0; |
736 | ||
737 | err_add_intf: | |
93a1df48 YAP |
738 | rtnl_lock(); |
739 | mwifiex_del_virtual_intf(priv->wdev->wiphy, priv->netdev); | |
740 | rtnl_unlock(); | |
5e6e3a92 | 741 | err_init_fw: |
5e6e3a92 BZ |
742 | pr_debug("info: %s: unregister device\n", __func__); |
743 | adapter->if_ops.unregister_dev(adapter); | |
744 | err_registerdev: | |
745 | adapter->surprise_removed = true; | |
746 | mwifiex_terminate_workqueue(adapter); | |
747 | err_kmalloc: | |
748 | if ((adapter->hw_status == MWIFIEX_HW_STATUS_FW_READY) || | |
749 | (adapter->hw_status == MWIFIEX_HW_STATUS_READY)) { | |
750 | pr_debug("info: %s: shutdown mwifiex\n", __func__); | |
751 | adapter->init_wait_q_woken = false; | |
636c4598 YAP |
752 | |
753 | if (mwifiex_shutdown_drv(adapter) == -EINPROGRESS) | |
5e6e3a92 BZ |
754 | wait_event_interruptible(adapter->init_wait_q, |
755 | adapter->init_wait_q_woken); | |
756 | } | |
757 | ||
758 | mwifiex_free_adapter(adapter); | |
759 | ||
760 | err_init_sw: | |
761 | up(sem); | |
762 | ||
763 | exit_sem_err: | |
764 | return -1; | |
765 | } | |
766 | EXPORT_SYMBOL_GPL(mwifiex_add_card); | |
767 | ||
768 | /* | |
769 | * This function removes the card. | |
770 | * | |
771 | * This function follows the following major steps to remove the device - | |
772 | * - Stop data traffic | |
773 | * - Shutdown firmware | |
774 | * - Remove the logical interfaces | |
775 | * - Terminate the work queue | |
776 | * - Unregister the device | |
777 | * - Free the adapter structure | |
778 | */ | |
779 | int mwifiex_remove_card(struct mwifiex_adapter *adapter, struct semaphore *sem) | |
780 | { | |
781 | struct mwifiex_private *priv = NULL; | |
5e6e3a92 BZ |
782 | int i; |
783 | ||
784 | if (down_interruptible(sem)) | |
785 | goto exit_sem_err; | |
786 | ||
787 | if (!adapter) | |
788 | goto exit_remove; | |
789 | ||
790 | adapter->surprise_removed = true; | |
791 | ||
792 | /* Stop data */ | |
793 | for (i = 0; i < adapter->priv_num; i++) { | |
794 | priv = adapter->priv[i]; | |
93a1df48 | 795 | if (priv && priv->netdev) { |
5e6e3a92 BZ |
796 | if (!netif_queue_stopped(priv->netdev)) |
797 | netif_stop_queue(priv->netdev); | |
798 | if (netif_carrier_ok(priv->netdev)) | |
799 | netif_carrier_off(priv->netdev); | |
800 | } | |
801 | } | |
802 | ||
803 | dev_dbg(adapter->dev, "cmd: calling mwifiex_shutdown_drv...\n"); | |
804 | adapter->init_wait_q_woken = false; | |
636c4598 YAP |
805 | |
806 | if (mwifiex_shutdown_drv(adapter) == -EINPROGRESS) | |
5e6e3a92 BZ |
807 | wait_event_interruptible(adapter->init_wait_q, |
808 | adapter->init_wait_q_woken); | |
809 | dev_dbg(adapter->dev, "cmd: mwifiex_shutdown_drv done\n"); | |
810 | if (atomic_read(&adapter->rx_pending) || | |
811 | atomic_read(&adapter->tx_pending) || | |
600f5d90 | 812 | atomic_read(&adapter->cmd_pending)) { |
5e6e3a92 | 813 | dev_err(adapter->dev, "rx_pending=%d, tx_pending=%d, " |
600f5d90 | 814 | "cmd_pending=%d\n", |
5e6e3a92 BZ |
815 | atomic_read(&adapter->rx_pending), |
816 | atomic_read(&adapter->tx_pending), | |
600f5d90 | 817 | atomic_read(&adapter->cmd_pending)); |
5e6e3a92 BZ |
818 | } |
819 | ||
93a1df48 YAP |
820 | for (i = 0; i < adapter->priv_num; i++) { |
821 | priv = adapter->priv[i]; | |
822 | ||
823 | if (!priv) | |
824 | continue; | |
825 | ||
826 | rtnl_lock(); | |
827 | mwifiex_del_virtual_intf(priv->wdev->wiphy, priv->netdev); | |
828 | rtnl_unlock(); | |
829 | } | |
830 | ||
831 | wiphy_unregister(priv->wdev->wiphy); | |
832 | wiphy_free(priv->wdev->wiphy); | |
833 | kfree(priv->wdev); | |
5e6e3a92 BZ |
834 | |
835 | mwifiex_terminate_workqueue(adapter); | |
836 | ||
837 | /* Unregister device */ | |
838 | dev_dbg(adapter->dev, "info: unregister device\n"); | |
839 | adapter->if_ops.unregister_dev(adapter); | |
840 | /* Free adapter structure */ | |
841 | dev_dbg(adapter->dev, "info: free adapter\n"); | |
842 | mwifiex_free_adapter(adapter); | |
843 | ||
844 | exit_remove: | |
845 | up(sem); | |
846 | exit_sem_err: | |
847 | return 0; | |
848 | } | |
849 | EXPORT_SYMBOL_GPL(mwifiex_remove_card); | |
850 | ||
851 | /* | |
852 | * This function initializes the module. | |
853 | * | |
854 | * The debug FS is also initialized if configured. | |
855 | */ | |
856 | static int | |
857 | mwifiex_init_module(void) | |
858 | { | |
859 | #ifdef CONFIG_DEBUG_FS | |
860 | mwifiex_debugfs_init(); | |
861 | #endif | |
862 | return 0; | |
863 | } | |
864 | ||
865 | /* | |
866 | * This function cleans up the module. | |
867 | * | |
868 | * The debug FS is removed if available. | |
869 | */ | |
870 | static void | |
871 | mwifiex_cleanup_module(void) | |
872 | { | |
873 | #ifdef CONFIG_DEBUG_FS | |
874 | mwifiex_debugfs_remove(); | |
875 | #endif | |
876 | } | |
877 | ||
878 | module_init(mwifiex_init_module); | |
879 | module_exit(mwifiex_cleanup_module); | |
880 | ||
881 | MODULE_AUTHOR("Marvell International Ltd."); | |
882 | MODULE_DESCRIPTION("Marvell WiFi-Ex Driver version " VERSION); | |
883 | MODULE_VERSION(VERSION); | |
884 | MODULE_LICENSE("GPL v2"); |