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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 | ||
29 | struct mwifiex_adapter *g_adapter; | |
30 | EXPORT_SYMBOL_GPL(g_adapter); | |
31 | ||
32 | static struct mwifiex_bss_attr mwifiex_bss_sta[] = { | |
33 | {MWIFIEX_BSS_TYPE_STA, MWIFIEX_DATA_FRAME_TYPE_ETH_II, true, 0, 0}, | |
34 | }; | |
35 | ||
36 | static int drv_mode = DRV_MODE_STA; | |
37 | ||
38 | static char fw_name[32] = DEFAULT_FW_NAME; | |
39 | ||
40 | /* Supported drv_mode table */ | |
41 | static struct mwifiex_drv_mode mwifiex_drv_mode_tbl[] = { | |
42 | { | |
43 | /* drv_mode */ | |
44 | .drv_mode = DRV_MODE_STA, | |
45 | /* intf number */ | |
46 | .intf_num = ARRAY_SIZE(mwifiex_bss_sta), | |
47 | /* bss_attr */ | |
48 | .bss_attr = mwifiex_bss_sta, | |
49 | } | |
50 | , | |
51 | }; | |
52 | ||
53 | /* | |
54 | * This function registers the device and performs all the necessary | |
55 | * initializations. | |
56 | * | |
57 | * The following initialization operations are performed - | |
58 | * - Allocate adapter structure | |
59 | * - Save interface specific operations table in adapter | |
60 | * - Call interface specific initialization routine | |
61 | * - Allocate private structures | |
62 | * - Set default adapter structure parameters | |
63 | * - Initialize locks | |
64 | * | |
65 | * In case of any errors during inittialization, this function also ensures | |
66 | * proper cleanup before exiting. | |
67 | */ | |
68 | static int mwifiex_register(void *card, struct mwifiex_if_ops *if_ops, | |
69 | struct mwifiex_device *mdevice, void **padapter) | |
70 | { | |
71 | int ret = 0; | |
72 | struct mwifiex_adapter *adapter = NULL; | |
73 | u8 i = 0; | |
74 | ||
75 | adapter = kzalloc(sizeof(struct mwifiex_adapter), GFP_KERNEL); | |
76 | /* Allocate memory for adapter structure */ | |
77 | if (!adapter) | |
78 | return -1; | |
79 | ||
80 | g_adapter = adapter; | |
81 | adapter->card = card; | |
82 | ||
83 | /* Save interface specific operations in adapter */ | |
84 | memmove(&adapter->if_ops, if_ops, sizeof(struct mwifiex_if_ops)); | |
85 | ||
86 | /* card specific initialization has been deferred until now .. */ | |
87 | ret = adapter->if_ops.init_if(adapter); | |
88 | if (ret) | |
89 | goto error; | |
90 | ||
91 | adapter->priv_num = 0; | |
92 | for (i = 0; i < MWIFIEX_MAX_BSS_NUM; i++) { | |
93 | adapter->priv[i] = NULL; | |
94 | ||
95 | if (!mdevice->bss_attr[i].active) | |
96 | continue; | |
97 | ||
98 | /* For valid bss_attr, | |
99 | allocate memory for private structure */ | |
100 | adapter->priv[i] = kzalloc(sizeof(struct mwifiex_private), | |
101 | GFP_KERNEL); | |
102 | if (!adapter->priv[i]) { | |
103 | dev_err(adapter->dev, "%s: failed to alloc priv[%d]\n", | |
104 | __func__, i); | |
105 | goto error; | |
106 | } | |
107 | ||
108 | adapter->priv_num++; | |
109 | memset(adapter->priv[i], 0, | |
110 | sizeof(struct mwifiex_private)); | |
111 | adapter->priv[i]->adapter = adapter; | |
112 | /* Save bss_type, frame_type & bss_priority */ | |
113 | adapter->priv[i]->bss_type = (u8) mdevice->bss_attr[i].bss_type; | |
114 | adapter->priv[i]->frame_type = | |
115 | (u8) mdevice->bss_attr[i].frame_type; | |
116 | adapter->priv[i]->bss_priority = | |
117 | (u8) mdevice->bss_attr[i].bss_priority; | |
118 | if (mdevice->bss_attr[i].bss_type == MWIFIEX_BSS_TYPE_STA) | |
119 | adapter->priv[i]->bss_role = MWIFIEX_BSS_ROLE_STA; | |
120 | else if (mdevice->bss_attr[i].bss_type == MWIFIEX_BSS_TYPE_UAP) | |
121 | adapter->priv[i]->bss_role = MWIFIEX_BSS_ROLE_UAP; | |
122 | ||
123 | /* Save bss_index & bss_num */ | |
124 | adapter->priv[i]->bss_index = i; | |
125 | adapter->priv[i]->bss_num = mdevice->bss_attr[i].bss_num; | |
126 | } | |
127 | ||
128 | /* Initialize lock variables */ | |
129 | if (mwifiex_init_lock_list(adapter)) | |
130 | goto error; | |
131 | ||
132 | init_timer(&adapter->cmd_timer); | |
133 | adapter->cmd_timer.function = mwifiex_cmd_timeout_func; | |
134 | adapter->cmd_timer.data = (unsigned long) adapter; | |
135 | ||
136 | /* Return pointer of struct mwifiex_adapter */ | |
137 | *padapter = adapter; | |
138 | return 0; | |
139 | ||
140 | error: | |
141 | dev_dbg(adapter->dev, "info: leave mwifiex_register with error\n"); | |
142 | ||
143 | /* Free lock variables */ | |
144 | mwifiex_free_lock_list(adapter); | |
145 | for (i = 0; i < MWIFIEX_MAX_BSS_NUM; i++) | |
146 | kfree(adapter->priv[i]); | |
147 | kfree(adapter); | |
148 | ||
149 | return -1; | |
150 | } | |
151 | ||
152 | /* | |
153 | * This function unregisters the device and performs all the necessary | |
154 | * cleanups. | |
155 | * | |
156 | * The following cleanup operations are performed - | |
157 | * - Free the timers | |
158 | * - Free beacon buffers | |
159 | * - Free private structures | |
160 | * - Free adapter structure | |
161 | */ | |
162 | static int mwifiex_unregister(struct mwifiex_adapter *adapter) | |
163 | { | |
164 | s32 i = 0; | |
165 | ||
166 | del_timer(&adapter->cmd_timer); | |
167 | ||
168 | /* Free private structures */ | |
169 | for (i = 0; i < adapter->priv_num; i++) { | |
170 | if (adapter->priv[i]) { | |
171 | mwifiex_free_curr_bcn(adapter->priv[i]); | |
172 | kfree(adapter->priv[i]); | |
173 | } | |
174 | } | |
175 | ||
176 | kfree(adapter); | |
177 | return 0; | |
178 | } | |
179 | ||
180 | /* | |
181 | * The main process. | |
182 | * | |
183 | * This function is the main procedure of the driver and handles various driver | |
184 | * operations. It runs in a loop and provides the core functionalities. | |
185 | * | |
186 | * The main responsibilities of this function are - | |
187 | * - Ensure concurrency control | |
188 | * - Handle pending interrupts and call interrupt handlers | |
189 | * - Wake up the card if required | |
190 | * - Handle command responses and call response handlers | |
191 | * - Handle events and call event handlers | |
192 | * - Execute pending commands | |
193 | * - Transmit pending data packets | |
194 | */ | |
195 | int mwifiex_main_process(struct mwifiex_adapter *adapter) | |
196 | { | |
197 | int ret = 0; | |
198 | unsigned long flags; | |
199 | ||
200 | spin_lock_irqsave(&adapter->main_proc_lock, flags); | |
201 | ||
202 | /* Check if already processing */ | |
203 | if (adapter->mwifiex_processing) { | |
204 | spin_unlock_irqrestore(&adapter->main_proc_lock, flags); | |
205 | goto exit_main_proc; | |
206 | } else { | |
207 | adapter->mwifiex_processing = true; | |
208 | spin_unlock_irqrestore(&adapter->main_proc_lock, flags); | |
209 | } | |
210 | process_start: | |
211 | do { | |
212 | if ((adapter->hw_status == MWIFIEX_HW_STATUS_CLOSING) || | |
213 | (adapter->hw_status == MWIFIEX_HW_STATUS_NOT_READY)) | |
214 | break; | |
215 | ||
216 | /* Handle pending interrupt if any */ | |
217 | if (adapter->int_status) { | |
218 | if (adapter->hs_activated) | |
219 | mwifiex_process_hs_config(adapter); | |
220 | adapter->if_ops.process_int_status(adapter); | |
221 | } | |
222 | ||
223 | /* Need to wake up the card ? */ | |
224 | if ((adapter->ps_state == PS_STATE_SLEEP) && | |
225 | (adapter->pm_wakeup_card_req && | |
226 | !adapter->pm_wakeup_fw_try) && | |
227 | (is_command_pending(adapter) | |
228 | || !mwifiex_wmm_lists_empty(adapter))) { | |
229 | adapter->pm_wakeup_fw_try = true; | |
230 | adapter->if_ops.wakeup(adapter); | |
231 | continue; | |
232 | } | |
233 | if (IS_CARD_RX_RCVD(adapter)) { | |
234 | adapter->pm_wakeup_fw_try = false; | |
235 | if (adapter->ps_state == PS_STATE_SLEEP) | |
236 | adapter->ps_state = PS_STATE_AWAKE; | |
237 | } else { | |
238 | /* We have tried to wakeup the card already */ | |
239 | if (adapter->pm_wakeup_fw_try) | |
240 | break; | |
241 | if (adapter->ps_state != PS_STATE_AWAKE || | |
242 | adapter->tx_lock_flag) | |
243 | break; | |
244 | ||
245 | if (adapter->scan_processing || adapter->data_sent | |
246 | || mwifiex_wmm_lists_empty(adapter)) { | |
247 | if (adapter->cmd_sent || adapter->curr_cmd | |
248 | || (!is_command_pending(adapter))) | |
249 | break; | |
250 | } | |
251 | } | |
252 | ||
253 | /* Check for Cmd Resp */ | |
254 | if (adapter->cmd_resp_received) { | |
255 | adapter->cmd_resp_received = false; | |
256 | mwifiex_process_cmdresp(adapter); | |
257 | ||
258 | /* call mwifiex back when init_fw is done */ | |
259 | if (adapter->hw_status == MWIFIEX_HW_STATUS_INIT_DONE) { | |
260 | adapter->hw_status = MWIFIEX_HW_STATUS_READY; | |
261 | mwifiex_init_fw_complete(adapter); | |
262 | } | |
263 | } | |
264 | ||
265 | /* Check for event */ | |
266 | if (adapter->event_received) { | |
267 | adapter->event_received = false; | |
268 | mwifiex_process_event(adapter); | |
269 | } | |
270 | ||
271 | /* Check if we need to confirm Sleep Request | |
272 | received previously */ | |
273 | if (adapter->ps_state == PS_STATE_PRE_SLEEP) { | |
274 | if (!adapter->cmd_sent && !adapter->curr_cmd) | |
275 | mwifiex_check_ps_cond(adapter); | |
276 | } | |
277 | ||
278 | /* * The ps_state may have been changed during processing of | |
279 | * Sleep Request event. | |
280 | */ | |
281 | if ((adapter->ps_state == PS_STATE_SLEEP) | |
282 | || (adapter->ps_state == PS_STATE_PRE_SLEEP) | |
283 | || (adapter->ps_state == PS_STATE_SLEEP_CFM) | |
284 | || adapter->tx_lock_flag) | |
285 | continue; | |
286 | ||
287 | if (!adapter->cmd_sent && !adapter->curr_cmd) { | |
288 | if (mwifiex_exec_next_cmd(adapter) == -1) { | |
289 | ret = -1; | |
290 | break; | |
291 | } | |
292 | } | |
293 | ||
294 | if (!adapter->scan_processing && !adapter->data_sent && | |
295 | !mwifiex_wmm_lists_empty(adapter)) { | |
296 | mwifiex_wmm_process_tx(adapter); | |
297 | if (adapter->hs_activated) { | |
298 | adapter->is_hs_configured = false; | |
299 | mwifiex_hs_activated_event | |
300 | (mwifiex_get_priv | |
301 | (adapter, MWIFIEX_BSS_ROLE_ANY), | |
302 | false); | |
303 | } | |
304 | } | |
305 | ||
306 | if (adapter->delay_null_pkt && !adapter->cmd_sent && | |
307 | !adapter->curr_cmd && !is_command_pending(adapter) | |
308 | && mwifiex_wmm_lists_empty(adapter)) { | |
309 | if (!mwifiex_send_null_packet | |
310 | (mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA), | |
311 | MWIFIEX_TxPD_POWER_MGMT_NULL_PACKET | | |
312 | MWIFIEX_TxPD_POWER_MGMT_LAST_PACKET)) { | |
313 | adapter->delay_null_pkt = false; | |
314 | adapter->ps_state = PS_STATE_SLEEP; | |
315 | } | |
316 | break; | |
317 | } | |
318 | } while (true); | |
319 | ||
320 | if ((adapter->int_status) || IS_CARD_RX_RCVD(adapter)) | |
321 | goto process_start; | |
322 | ||
323 | spin_lock_irqsave(&adapter->main_proc_lock, flags); | |
324 | adapter->mwifiex_processing = false; | |
325 | spin_unlock_irqrestore(&adapter->main_proc_lock, flags); | |
326 | ||
327 | exit_main_proc: | |
328 | if (adapter->hw_status == MWIFIEX_HW_STATUS_CLOSING) | |
329 | mwifiex_shutdown_drv(adapter); | |
330 | return ret; | |
331 | } | |
332 | ||
333 | /* | |
334 | * This function initializes the software. | |
335 | * | |
336 | * The main work includes allocating and initializing the adapter structure | |
337 | * and initializing the private structures. | |
338 | */ | |
339 | static int | |
340 | mwifiex_init_sw(void *card, struct mwifiex_if_ops *if_ops, void **pmwifiex) | |
341 | { | |
342 | int i; | |
343 | struct mwifiex_device device; | |
344 | struct mwifiex_drv_mode *drv_mode_ptr; | |
345 | ||
346 | /* find mwifiex_drv_mode entry from mwifiex_drv_mode_tbl */ | |
347 | drv_mode_ptr = NULL; | |
348 | for (i = 0; i < ARRAY_SIZE(mwifiex_drv_mode_tbl); i++) { | |
349 | if (mwifiex_drv_mode_tbl[i].drv_mode == drv_mode) { | |
350 | drv_mode_ptr = &mwifiex_drv_mode_tbl[i]; | |
351 | break; | |
352 | } | |
353 | } | |
354 | ||
355 | if (!drv_mode_ptr) { | |
356 | pr_err("invalid drv_mode=%d\n", drv_mode); | |
357 | return -1; | |
358 | } | |
359 | ||
360 | memset(&device, 0, sizeof(struct mwifiex_device)); | |
361 | ||
362 | for (i = 0; i < drv_mode_ptr->intf_num; i++) { | |
363 | device.bss_attr[i].bss_type = | |
364 | drv_mode_ptr->bss_attr[i].bss_type; | |
365 | device.bss_attr[i].frame_type = | |
366 | drv_mode_ptr->bss_attr[i].frame_type; | |
367 | device.bss_attr[i].active = drv_mode_ptr->bss_attr[i].active; | |
368 | device.bss_attr[i].bss_priority = | |
369 | drv_mode_ptr->bss_attr[i].bss_priority; | |
370 | device.bss_attr[i].bss_num = drv_mode_ptr->bss_attr[i].bss_num; | |
371 | } | |
372 | ||
373 | if (mwifiex_register(card, if_ops, &device, pmwifiex)) | |
374 | return -1; | |
375 | ||
376 | return 0; | |
377 | } | |
378 | ||
379 | /* | |
380 | * This function frees the adapter structure. | |
381 | * | |
382 | * Additionally, this closes the netlink socket, frees the timers | |
383 | * and private structures. | |
384 | */ | |
385 | static void mwifiex_free_adapter(struct mwifiex_adapter *adapter) | |
386 | { | |
387 | if (!adapter) { | |
388 | pr_err("%s: adapter is NULL\n", __func__); | |
389 | return; | |
390 | } | |
391 | ||
392 | mwifiex_unregister(adapter); | |
393 | pr_debug("info: %s: free adapter\n", __func__); | |
394 | } | |
395 | ||
396 | /* | |
397 | * This function initializes the hardware and firmware. | |
398 | * | |
399 | * The main initialization steps followed are - | |
400 | * - Download the correct firmware to card | |
401 | * - Allocate and initialize the adapter structure | |
402 | * - Initialize the private structures | |
403 | * - Issue the init commands to firmware | |
404 | */ | |
405 | static int mwifiex_init_hw_fw(struct mwifiex_adapter *adapter) | |
406 | { | |
407 | int ret = 0; | |
408 | int err; | |
409 | struct mwifiex_fw_image fw; | |
410 | ||
411 | memset(&fw, 0, sizeof(struct mwifiex_fw_image)); | |
412 | ||
413 | switch (adapter->revision_id) { | |
414 | case SD8787_W0: | |
415 | case SD8787_W1: | |
416 | strcpy(fw_name, SD8787_W1_FW_NAME); | |
417 | break; | |
418 | case SD8787_A0: | |
419 | case SD8787_A1: | |
420 | strcpy(fw_name, SD8787_AX_FW_NAME); | |
421 | break; | |
422 | default: | |
423 | break; | |
424 | } | |
425 | ||
426 | err = request_firmware(&adapter->firmware, fw_name, adapter->dev); | |
427 | if (err < 0) { | |
428 | dev_err(adapter->dev, "request_firmware() returned" | |
429 | " error code %#x\n", err); | |
430 | ret = -1; | |
431 | goto done; | |
432 | } | |
433 | fw.fw_buf = (u8 *) adapter->firmware->data; | |
434 | fw.fw_len = adapter->firmware->size; | |
435 | ||
436 | ret = mwifiex_dnld_fw(adapter, &fw); | |
437 | if (ret == -1) | |
438 | goto done; | |
439 | ||
440 | dev_notice(adapter->dev, "WLAN FW is active\n"); | |
441 | ||
442 | adapter->init_wait_q_woken = false; | |
443 | ret = mwifiex_init_fw(adapter); | |
444 | if (ret == -1) { | |
445 | goto done; | |
446 | } else if (!ret) { | |
447 | adapter->hw_status = MWIFIEX_HW_STATUS_READY; | |
448 | goto done; | |
449 | } | |
450 | /* Wait for mwifiex_init to complete */ | |
451 | wait_event_interruptible(adapter->init_wait_q, | |
452 | adapter->init_wait_q_woken); | |
453 | if (adapter->hw_status != MWIFIEX_HW_STATUS_READY) { | |
454 | ret = -1; | |
455 | goto done; | |
456 | } | |
457 | ret = 0; | |
458 | ||
459 | done: | |
460 | if (adapter->firmware) | |
461 | release_firmware(adapter->firmware); | |
462 | if (ret) | |
463 | ret = -1; | |
464 | return ret; | |
465 | } | |
466 | ||
467 | /* | |
468 | * This function fills a driver buffer. | |
469 | * | |
470 | * The function associates a given SKB with the provided driver buffer | |
471 | * and also updates some of the SKB parameters, including IP header, | |
472 | * priority and timestamp. | |
473 | */ | |
474 | static void | |
475 | mwifiex_fill_buffer(struct sk_buff *skb) | |
476 | { | |
477 | struct ethhdr *eth = NULL; | |
478 | struct iphdr *iph; | |
479 | struct timeval tv; | |
480 | u8 tid = 0; | |
481 | ||
482 | eth = (struct ethhdr *) skb->data; | |
483 | switch (eth->h_proto) { | |
484 | case __constant_htons(ETH_P_IP): | |
485 | iph = ip_hdr(skb); | |
486 | tid = IPTOS_PREC(iph->tos); | |
487 | pr_debug("data: packet type ETH_P_IP: %04x, tid=%#x prio=%#x\n", | |
488 | eth->h_proto, tid, skb->priority); | |
489 | break; | |
490 | case __constant_htons(ETH_P_ARP): | |
491 | pr_debug("data: ARP packet: %04x\n", eth->h_proto); | |
492 | default: | |
493 | break; | |
494 | } | |
495 | /* Offset for TOS field in the IP header */ | |
496 | #define IPTOS_OFFSET 5 | |
497 | tid = (tid >> IPTOS_OFFSET); | |
498 | skb->priority = tid; | |
499 | /* Record the current time the packet was queued; used to | |
500 | determine the amount of time the packet was queued in | |
501 | the driver before it was sent to the firmware. | |
502 | The delay is then sent along with the packet to the | |
503 | firmware for aggregate delay calculation for stats and | |
504 | MSDU lifetime expiry. | |
505 | */ | |
506 | do_gettimeofday(&tv); | |
507 | skb->tstamp = timeval_to_ktime(tv); | |
508 | return; | |
509 | } | |
510 | ||
511 | /* | |
512 | * CFG802.11 network device handler for open. | |
513 | * | |
514 | * Starts the data queue. | |
515 | */ | |
516 | static int | |
517 | mwifiex_open(struct net_device *dev) | |
518 | { | |
519 | netif_start_queue(dev); | |
520 | return 0; | |
521 | } | |
522 | ||
523 | /* | |
524 | * CFG802.11 network device handler for close. | |
525 | */ | |
526 | static int | |
527 | mwifiex_close(struct net_device *dev) | |
528 | { | |
529 | return 0; | |
530 | } | |
531 | ||
532 | /* | |
533 | * CFG802.11 network device handler for data transmission. | |
534 | */ | |
535 | static int | |
536 | mwifiex_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
537 | { | |
538 | struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev); | |
539 | struct sk_buff *new_skb = NULL; | |
540 | struct mwifiex_txinfo *tx_info; | |
541 | ||
542 | dev_dbg(priv->adapter->dev, "data: %lu BSS(%d): Data <= kernel\n", | |
543 | jiffies, priv->bss_index); | |
544 | ||
545 | if (priv->adapter->surprise_removed) { | |
546 | kfree(skb); | |
547 | priv->stats.tx_dropped++; | |
548 | return 0; | |
549 | } | |
550 | if (!skb->len || (skb->len > ETH_FRAME_LEN)) { | |
551 | dev_err(priv->adapter->dev, "Tx: bad skb len %d\n", skb->len); | |
552 | kfree(skb); | |
553 | priv->stats.tx_dropped++; | |
554 | return 0; | |
555 | } | |
556 | if (skb_headroom(skb) < MWIFIEX_MIN_DATA_HEADER_LEN) { | |
557 | dev_dbg(priv->adapter->dev, | |
558 | "data: Tx: insufficient skb headroom %d\n", | |
559 | skb_headroom(skb)); | |
560 | /* Insufficient skb headroom - allocate a new skb */ | |
561 | new_skb = | |
562 | skb_realloc_headroom(skb, MWIFIEX_MIN_DATA_HEADER_LEN); | |
563 | if (unlikely(!new_skb)) { | |
564 | dev_err(priv->adapter->dev, "Tx: cannot alloca new_skb\n"); | |
565 | kfree(skb); | |
566 | priv->stats.tx_dropped++; | |
567 | return 0; | |
568 | } | |
569 | kfree_skb(skb); | |
570 | skb = new_skb; | |
571 | dev_dbg(priv->adapter->dev, "info: new skb headroomd %d\n", | |
572 | skb_headroom(skb)); | |
573 | } | |
574 | ||
575 | tx_info = MWIFIEX_SKB_TXCB(skb); | |
576 | tx_info->bss_index = priv->bss_index; | |
577 | mwifiex_fill_buffer(skb); | |
578 | ||
579 | mwifiex_wmm_add_buf_txqueue(priv->adapter, skb); | |
580 | atomic_inc(&priv->adapter->tx_pending); | |
581 | ||
582 | if (atomic_read(&priv->adapter->tx_pending) >= MAX_TX_PENDING) { | |
583 | netif_stop_queue(priv->netdev); | |
584 | dev->trans_start = jiffies; | |
585 | } | |
586 | ||
587 | queue_work(priv->adapter->workqueue, &priv->adapter->main_work); | |
588 | ||
589 | return 0; | |
590 | } | |
591 | ||
592 | /* | |
593 | * CFG802.11 network device handler for setting MAC address. | |
594 | */ | |
595 | static int | |
596 | mwifiex_set_mac_address(struct net_device *dev, void *addr) | |
597 | { | |
598 | struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev); | |
599 | struct sockaddr *hw_addr = (struct sockaddr *) addr; | |
600 | ||
601 | memcpy(priv->curr_addr, hw_addr->sa_data, ETH_ALEN); | |
602 | ||
603 | if (mwifiex_request_set_mac_address(priv)) { | |
604 | dev_err(priv->adapter->dev, "set MAC address failed\n"); | |
605 | return -EFAULT; | |
606 | } | |
607 | memcpy(dev->dev_addr, priv->curr_addr, ETH_ALEN); | |
608 | ||
609 | return 0; | |
610 | } | |
611 | ||
612 | /* | |
613 | * CFG802.11 network device handler for setting multicast list. | |
614 | */ | |
615 | static void mwifiex_set_multicast_list(struct net_device *dev) | |
616 | { | |
617 | struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev); | |
618 | mwifiex_request_set_multicast_list(priv, dev); | |
619 | } | |
620 | ||
621 | /* | |
622 | * CFG802.11 network device handler for transmission timeout. | |
623 | */ | |
624 | static void | |
625 | mwifiex_tx_timeout(struct net_device *dev) | |
626 | { | |
627 | struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev); | |
628 | ||
629 | dev_err(priv->adapter->dev, "%lu : Tx timeout, bss_index=%d\n", | |
630 | jiffies, priv->bss_index); | |
631 | dev->trans_start = jiffies; | |
632 | priv->num_tx_timeout++; | |
633 | } | |
634 | ||
635 | /* | |
636 | * CFG802.11 network device handler for statistics retrieval. | |
637 | */ | |
638 | static struct net_device_stats *mwifiex_get_stats(struct net_device *dev) | |
639 | { | |
640 | struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev); | |
641 | ||
642 | return &priv->stats; | |
643 | } | |
644 | ||
645 | /* Network device handlers */ | |
646 | static const struct net_device_ops mwifiex_netdev_ops = { | |
647 | .ndo_open = mwifiex_open, | |
648 | .ndo_stop = mwifiex_close, | |
649 | .ndo_start_xmit = mwifiex_hard_start_xmit, | |
650 | .ndo_set_mac_address = mwifiex_set_mac_address, | |
651 | .ndo_tx_timeout = mwifiex_tx_timeout, | |
652 | .ndo_get_stats = mwifiex_get_stats, | |
653 | .ndo_set_multicast_list = mwifiex_set_multicast_list, | |
654 | }; | |
655 | ||
656 | /* | |
657 | * This function initializes the private structure parameters. | |
658 | * | |
659 | * The following wait queues are initialized - | |
660 | * - IOCTL wait queue | |
661 | * - Command wait queue | |
662 | * - Statistics wait queue | |
663 | * | |
664 | * ...and the following default parameters are set - | |
665 | * - Current key index : Set to 0 | |
666 | * - Rate index : Set to auto | |
667 | * - Media connected : Set to disconnected | |
668 | * - Adhoc link sensed : Set to false | |
669 | * - Nick name : Set to null | |
670 | * - Number of Tx timeout : Set to 0 | |
671 | * - Device address : Set to current address | |
672 | * | |
673 | * In addition, the CFG80211 work queue is also created. | |
674 | */ | |
675 | static void | |
676 | mwifiex_init_priv_params(struct mwifiex_private *priv, struct net_device *dev) | |
677 | { | |
678 | dev->netdev_ops = &mwifiex_netdev_ops; | |
679 | /* Initialize private structure */ | |
680 | init_waitqueue_head(&priv->ioctl_wait_q); | |
681 | init_waitqueue_head(&priv->cmd_wait_q); | |
682 | init_waitqueue_head(&priv->w_stats_wait_q); | |
683 | priv->current_key_index = 0; | |
684 | priv->media_connected = false; | |
685 | memset(&priv->nick_name, 0, sizeof(priv->nick_name)); | |
686 | priv->num_tx_timeout = 0; | |
687 | priv->workqueue = create_singlethread_workqueue("cfg80211_wq"); | |
688 | INIT_WORK(&priv->cfg_workqueue, mwifiex_cfg80211_results); | |
689 | memcpy(dev->dev_addr, priv->curr_addr, ETH_ALEN); | |
690 | } | |
691 | ||
692 | /* | |
693 | * This function adds a new logical interface. | |
694 | * | |
695 | * It allocates, initializes and registers the interface by performing | |
696 | * the following opearations - | |
697 | * - Allocate a new net device structure | |
698 | * - Assign device name | |
699 | * - Register the new device with CFG80211 subsystem | |
700 | * - Initialize semaphore and private structure | |
701 | * - Register the new device with kernel | |
702 | * - Create the complete debug FS structure if configured | |
703 | */ | |
704 | static struct mwifiex_private *mwifiex_add_interface( | |
705 | struct mwifiex_adapter *adapter, | |
706 | u8 bss_index, u8 bss_type) | |
707 | { | |
708 | struct net_device *dev = NULL; | |
709 | struct mwifiex_private *priv = NULL; | |
710 | void *mdev_priv = NULL; | |
711 | ||
712 | dev = alloc_netdev_mq(sizeof(struct mwifiex_private *), "mlan%d", | |
713 | ether_setup, 1); | |
714 | if (!dev) { | |
715 | dev_err(adapter->dev, "no memory available for netdevice\n"); | |
716 | goto error; | |
717 | } | |
718 | if (dev_alloc_name(dev, dev->name)) { | |
719 | dev_err(adapter->dev, "unable to alloc name for netdevice\n"); | |
720 | goto error; | |
721 | } | |
722 | ||
723 | if (mwifiex_register_cfg80211(dev, adapter->priv[bss_index]->curr_addr, | |
724 | adapter->priv[bss_index]) != 0) { | |
725 | dev_err(adapter->dev, "cannot register netdevice with cfg80211\n"); | |
726 | goto error; | |
727 | } | |
728 | /* Save the priv pointer in netdev */ | |
729 | priv = adapter->priv[bss_index]; | |
730 | mdev_priv = netdev_priv(dev); | |
731 | *((unsigned long *) mdev_priv) = (unsigned long) priv; | |
732 | ||
733 | priv->netdev = dev; | |
734 | ||
735 | sema_init(&priv->async_sem, 1); | |
736 | priv->scan_pending_on_block = false; | |
737 | ||
738 | mwifiex_init_priv_params(priv, dev); | |
739 | ||
740 | SET_NETDEV_DEV(dev, adapter->dev); | |
741 | ||
742 | /* Register network device */ | |
743 | if (register_netdev(dev)) { | |
744 | dev_err(adapter->dev, "cannot register virtual network device\n"); | |
745 | goto error; | |
746 | } | |
747 | ||
748 | dev_dbg(adapter->dev, "info: %s: Marvell 802.11 Adapter\n", dev->name); | |
749 | #ifdef CONFIG_DEBUG_FS | |
750 | mwifiex_dev_debugfs_init(priv); | |
751 | #endif | |
752 | return priv; | |
753 | error: | |
754 | if (dev) | |
755 | free_netdev(dev); | |
756 | return NULL; | |
757 | } | |
758 | ||
759 | /* | |
760 | * This function removes a logical interface. | |
761 | * | |
762 | * It deregisters, resets and frees the interface by performing | |
763 | * the following operations - | |
764 | * - Disconnect the device if connected, send wireless event to | |
765 | * notify applications. | |
766 | * - Remove the debug FS structure if configured | |
767 | * - Unregister the device from kernel | |
768 | * - Free the net device structure | |
769 | * - Cancel all works and destroy work queue | |
770 | * - Unregister and free the wireless device from CFG80211 subsystem | |
771 | */ | |
772 | static void | |
773 | mwifiex_remove_interface(struct mwifiex_adapter *adapter, u8 bss_index) | |
774 | { | |
775 | struct net_device *dev = NULL; | |
776 | struct mwifiex_private *priv = adapter->priv[bss_index]; | |
777 | ||
778 | if (!priv) | |
779 | return; | |
780 | dev = priv->netdev; | |
781 | ||
782 | if (priv->media_connected) | |
783 | priv->media_connected = false; | |
784 | ||
785 | #ifdef CONFIG_DEBUG_FS | |
786 | mwifiex_dev_debugfs_remove(priv); | |
787 | #endif | |
788 | /* Last reference is our one */ | |
789 | dev_dbg(adapter->dev, "info: %s: refcnt = %d\n", | |
790 | dev->name, netdev_refcnt_read(dev)); | |
791 | ||
792 | if (dev->reg_state == NETREG_REGISTERED) | |
793 | unregister_netdev(dev); | |
794 | ||
795 | /* Clear the priv in adapter */ | |
796 | priv->netdev = NULL; | |
797 | if (dev) | |
798 | free_netdev(dev); | |
799 | ||
800 | cancel_work_sync(&priv->cfg_workqueue); | |
801 | flush_workqueue(priv->workqueue); | |
802 | destroy_workqueue(priv->workqueue); | |
803 | wiphy_unregister(priv->wdev->wiphy); | |
804 | wiphy_free(priv->wdev->wiphy); | |
805 | kfree(priv->wdev); | |
806 | ||
807 | return; | |
808 | } | |
809 | ||
810 | /* | |
811 | * Sends IOCTL request to shutdown firmware. | |
812 | * | |
813 | * This function allocates the IOCTL request buffer, fills it | |
814 | * with requisite parameters and calls the IOCTL handler. | |
815 | */ | |
816 | int mwifiex_shutdown_fw(struct mwifiex_private *priv, u8 wait_option) | |
817 | { | |
818 | struct mwifiex_wait_queue *wait = NULL; | |
819 | int status = 0; | |
820 | ||
821 | /* Allocate an IOCTL request buffer */ | |
822 | wait = mwifiex_alloc_fill_wait_queue(priv, wait_option); | |
823 | if (!wait) | |
824 | return -ENOMEM; | |
825 | ||
826 | status = mwifiex_misc_ioctl_init_shutdown(priv->adapter, wait, | |
827 | MWIFIEX_FUNC_SHUTDOWN); | |
828 | ||
829 | status = mwifiex_request_ioctl(priv, wait, status, wait_option); | |
830 | ||
831 | kfree(wait); | |
832 | return status; | |
833 | } | |
834 | EXPORT_SYMBOL_GPL(mwifiex_shutdown_fw); | |
835 | ||
836 | /* | |
837 | * This function check if command is pending. | |
838 | */ | |
839 | int is_command_pending(struct mwifiex_adapter *adapter) | |
840 | { | |
841 | unsigned long flags; | |
842 | int is_cmd_pend_q_empty; | |
843 | ||
844 | spin_lock_irqsave(&adapter->cmd_pending_q_lock, flags); | |
845 | is_cmd_pend_q_empty = list_empty(&adapter->cmd_pending_q); | |
846 | spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, flags); | |
847 | ||
848 | return !is_cmd_pend_q_empty; | |
849 | } | |
850 | ||
851 | /* | |
852 | * This function returns the correct private structure pointer based | |
853 | * upon the BSS number. | |
854 | */ | |
855 | struct mwifiex_private * | |
856 | mwifiex_bss_index_to_priv(struct mwifiex_adapter *adapter, u8 bss_index) | |
857 | { | |
858 | if (!adapter || (bss_index >= adapter->priv_num)) | |
859 | return NULL; | |
860 | return adapter->priv[bss_index]; | |
861 | } | |
862 | ||
863 | /* | |
864 | * This is the main work queue function. | |
865 | * | |
866 | * It handles the main process, which in turn handles the complete | |
867 | * driver operations. | |
868 | */ | |
869 | static void mwifiex_main_work_queue(struct work_struct *work) | |
870 | { | |
871 | struct mwifiex_adapter *adapter = | |
872 | container_of(work, struct mwifiex_adapter, main_work); | |
873 | ||
874 | if (adapter->surprise_removed) | |
875 | return; | |
876 | mwifiex_main_process(adapter); | |
877 | } | |
878 | ||
879 | /* | |
880 | * This function cancels all works in the queue and destroys | |
881 | * the main workqueue. | |
882 | */ | |
883 | static void | |
884 | mwifiex_terminate_workqueue(struct mwifiex_adapter *adapter) | |
885 | { | |
886 | flush_workqueue(adapter->workqueue); | |
887 | destroy_workqueue(adapter->workqueue); | |
888 | adapter->workqueue = NULL; | |
889 | } | |
890 | ||
891 | /* | |
892 | * This function adds the card. | |
893 | * | |
894 | * This function follows the following major steps to set up the device - | |
895 | * - Initialize software. This includes probing the card, registering | |
896 | * the interface operations table, and allocating/initializing the | |
897 | * adapter structure | |
898 | * - Set up the netlink socket | |
899 | * - Create and start the main work queue | |
900 | * - Register the device | |
901 | * - Initialize firmware and hardware | |
902 | * - Add logical interfaces | |
903 | */ | |
904 | int | |
905 | mwifiex_add_card(void *card, struct semaphore *sem, | |
906 | struct mwifiex_if_ops *if_ops) | |
907 | { | |
908 | int status = 0; | |
909 | int i; | |
910 | struct mwifiex_adapter *adapter = NULL; | |
911 | struct mwifiex_drv_mode *drv_mode_info = &mwifiex_drv_mode_tbl[0]; | |
912 | ||
913 | if (down_interruptible(sem)) | |
914 | goto exit_sem_err; | |
915 | ||
916 | if (mwifiex_init_sw(card, if_ops, (void **) &adapter)) { | |
917 | pr_err("%s: software init failed\n", __func__); | |
918 | goto err_init_sw; | |
919 | } | |
920 | ||
921 | adapter->drv_mode = drv_mode_info; | |
922 | ||
923 | adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING; | |
924 | /* PnP and power profile */ | |
925 | adapter->surprise_removed = false; | |
926 | init_waitqueue_head(&adapter->init_wait_q); | |
927 | adapter->is_suspended = false; | |
928 | adapter->hs_activated = false; | |
929 | init_waitqueue_head(&adapter->hs_activate_wait_q); | |
930 | ||
931 | /* Create workqueue */ | |
932 | adapter->workqueue = create_workqueue("MWIFIEX_WORK_QUEUE"); | |
933 | if (!adapter->workqueue) | |
934 | goto err_kmalloc; | |
935 | ||
936 | INIT_WORK(&adapter->main_work, mwifiex_main_work_queue); | |
937 | ||
938 | /* Register the device. Fill up the private data structure with relevant | |
939 | information from the card and request for the required IRQ. */ | |
940 | if (adapter->if_ops.register_dev(adapter)) { | |
941 | pr_err("%s: failed to register mwifiex device\n", __func__); | |
942 | goto err_registerdev; | |
943 | } | |
944 | ||
945 | /* Init FW and HW */ | |
946 | if (mwifiex_init_hw_fw(adapter)) { | |
947 | pr_err("%s: firmware init failed\n", __func__); | |
948 | goto err_init_fw; | |
949 | } | |
950 | /* Add interfaces */ | |
951 | for (i = 0; i < drv_mode_info->intf_num; i++) { | |
952 | if (!mwifiex_add_interface(adapter, i, | |
953 | adapter->drv_mode->bss_attr[i].bss_type)) { | |
954 | status = -1; | |
955 | break; | |
956 | } | |
957 | } | |
958 | if (status) | |
959 | goto err_add_intf; | |
960 | ||
961 | up(sem); | |
962 | ||
963 | return 0; | |
964 | ||
965 | err_add_intf: | |
966 | for (i = 0; i < adapter->priv_num; i++) | |
967 | mwifiex_remove_interface(adapter, i); | |
968 | err_init_fw: | |
969 | /* Unregister device */ | |
970 | pr_debug("info: %s: unregister device\n", __func__); | |
971 | adapter->if_ops.unregister_dev(adapter); | |
972 | err_registerdev: | |
973 | adapter->surprise_removed = true; | |
974 | mwifiex_terminate_workqueue(adapter); | |
975 | err_kmalloc: | |
976 | if ((adapter->hw_status == MWIFIEX_HW_STATUS_FW_READY) || | |
977 | (adapter->hw_status == MWIFIEX_HW_STATUS_READY)) { | |
978 | pr_debug("info: %s: shutdown mwifiex\n", __func__); | |
979 | adapter->init_wait_q_woken = false; | |
980 | status = mwifiex_shutdown_drv(adapter); | |
981 | if (status == -EINPROGRESS) | |
982 | wait_event_interruptible(adapter->init_wait_q, | |
983 | adapter->init_wait_q_woken); | |
984 | } | |
985 | ||
986 | mwifiex_free_adapter(adapter); | |
987 | ||
988 | err_init_sw: | |
989 | up(sem); | |
990 | ||
991 | exit_sem_err: | |
992 | return -1; | |
993 | } | |
994 | EXPORT_SYMBOL_GPL(mwifiex_add_card); | |
995 | ||
996 | /* | |
997 | * This function removes the card. | |
998 | * | |
999 | * This function follows the following major steps to remove the device - | |
1000 | * - Stop data traffic | |
1001 | * - Shutdown firmware | |
1002 | * - Remove the logical interfaces | |
1003 | * - Terminate the work queue | |
1004 | * - Unregister the device | |
1005 | * - Free the adapter structure | |
1006 | */ | |
1007 | int mwifiex_remove_card(struct mwifiex_adapter *adapter, struct semaphore *sem) | |
1008 | { | |
1009 | struct mwifiex_private *priv = NULL; | |
1010 | int status; | |
1011 | int i; | |
1012 | ||
1013 | if (down_interruptible(sem)) | |
1014 | goto exit_sem_err; | |
1015 | ||
1016 | if (!adapter) | |
1017 | goto exit_remove; | |
1018 | ||
1019 | adapter->surprise_removed = true; | |
1020 | ||
1021 | /* Stop data */ | |
1022 | for (i = 0; i < adapter->priv_num; i++) { | |
1023 | priv = adapter->priv[i]; | |
1024 | if (priv) { | |
1025 | if (!netif_queue_stopped(priv->netdev)) | |
1026 | netif_stop_queue(priv->netdev); | |
1027 | if (netif_carrier_ok(priv->netdev)) | |
1028 | netif_carrier_off(priv->netdev); | |
1029 | } | |
1030 | } | |
1031 | ||
1032 | dev_dbg(adapter->dev, "cmd: calling mwifiex_shutdown_drv...\n"); | |
1033 | adapter->init_wait_q_woken = false; | |
1034 | status = mwifiex_shutdown_drv(adapter); | |
1035 | if (status == -EINPROGRESS) | |
1036 | wait_event_interruptible(adapter->init_wait_q, | |
1037 | adapter->init_wait_q_woken); | |
1038 | dev_dbg(adapter->dev, "cmd: mwifiex_shutdown_drv done\n"); | |
1039 | if (atomic_read(&adapter->rx_pending) || | |
1040 | atomic_read(&adapter->tx_pending) || | |
1041 | atomic_read(&adapter->ioctl_pending)) { | |
1042 | dev_err(adapter->dev, "rx_pending=%d, tx_pending=%d, " | |
1043 | "ioctl_pending=%d\n", | |
1044 | atomic_read(&adapter->rx_pending), | |
1045 | atomic_read(&adapter->tx_pending), | |
1046 | atomic_read(&adapter->ioctl_pending)); | |
1047 | } | |
1048 | ||
1049 | /* Remove interface */ | |
1050 | for (i = 0; i < adapter->priv_num; i++) | |
1051 | mwifiex_remove_interface(adapter, i); | |
1052 | ||
1053 | mwifiex_terminate_workqueue(adapter); | |
1054 | ||
1055 | /* Unregister device */ | |
1056 | dev_dbg(adapter->dev, "info: unregister device\n"); | |
1057 | adapter->if_ops.unregister_dev(adapter); | |
1058 | /* Free adapter structure */ | |
1059 | dev_dbg(adapter->dev, "info: free adapter\n"); | |
1060 | mwifiex_free_adapter(adapter); | |
1061 | ||
1062 | exit_remove: | |
1063 | up(sem); | |
1064 | exit_sem_err: | |
1065 | return 0; | |
1066 | } | |
1067 | EXPORT_SYMBOL_GPL(mwifiex_remove_card); | |
1068 | ||
1069 | /* | |
1070 | * This function initializes the module. | |
1071 | * | |
1072 | * The debug FS is also initialized if configured. | |
1073 | */ | |
1074 | static int | |
1075 | mwifiex_init_module(void) | |
1076 | { | |
1077 | #ifdef CONFIG_DEBUG_FS | |
1078 | mwifiex_debugfs_init(); | |
1079 | #endif | |
1080 | return 0; | |
1081 | } | |
1082 | ||
1083 | /* | |
1084 | * This function cleans up the module. | |
1085 | * | |
1086 | * The debug FS is removed if available. | |
1087 | */ | |
1088 | static void | |
1089 | mwifiex_cleanup_module(void) | |
1090 | { | |
1091 | #ifdef CONFIG_DEBUG_FS | |
1092 | mwifiex_debugfs_remove(); | |
1093 | #endif | |
1094 | } | |
1095 | ||
1096 | module_init(mwifiex_init_module); | |
1097 | module_exit(mwifiex_cleanup_module); | |
1098 | ||
1099 | MODULE_AUTHOR("Marvell International Ltd."); | |
1100 | MODULE_DESCRIPTION("Marvell WiFi-Ex Driver version " VERSION); | |
1101 | MODULE_VERSION(VERSION); | |
1102 | MODULE_LICENSE("GPL v2"); |