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 | ||
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 | { | |
2be7859f AK |
43 | .drv_mode = DRV_MODE_STA, |
44 | .intf_num = ARRAY_SIZE(mwifiex_bss_sta), | |
45 | .bss_attr = mwifiex_bss_sta, | |
46 | }, | |
5e6e3a92 BZ |
47 | }; |
48 | ||
49 | /* | |
50 | * This function registers the device and performs all the necessary | |
51 | * initializations. | |
52 | * | |
53 | * The following initialization operations are performed - | |
54 | * - Allocate adapter structure | |
55 | * - Save interface specific operations table in adapter | |
56 | * - Call interface specific initialization routine | |
57 | * - Allocate private structures | |
58 | * - Set default adapter structure parameters | |
59 | * - Initialize locks | |
60 | * | |
61 | * In case of any errors during inittialization, this function also ensures | |
62 | * proper cleanup before exiting. | |
63 | */ | |
64 | static int mwifiex_register(void *card, struct mwifiex_if_ops *if_ops, | |
2be7859f | 65 | struct mwifiex_drv_mode *drv_mode_ptr) |
5e6e3a92 | 66 | { |
2be7859f AK |
67 | struct mwifiex_adapter *adapter; |
68 | int i; | |
5e6e3a92 BZ |
69 | |
70 | adapter = kzalloc(sizeof(struct mwifiex_adapter), GFP_KERNEL); | |
5e6e3a92 BZ |
71 | if (!adapter) |
72 | return -1; | |
73 | ||
74 | g_adapter = adapter; | |
75 | adapter->card = card; | |
76 | ||
77 | /* Save interface specific operations in adapter */ | |
78 | memmove(&adapter->if_ops, if_ops, sizeof(struct mwifiex_if_ops)); | |
79 | ||
80 | /* card specific initialization has been deferred until now .. */ | |
636c4598 | 81 | if (adapter->if_ops.init_if(adapter)) |
5e6e3a92 BZ |
82 | goto error; |
83 | ||
84 | adapter->priv_num = 0; | |
2be7859f | 85 | for (i = 0; i < drv_mode_ptr->intf_num; i++) { |
5e6e3a92 BZ |
86 | adapter->priv[i] = NULL; |
87 | ||
2be7859f | 88 | if (!drv_mode_ptr->bss_attr[i].active) |
5e6e3a92 BZ |
89 | continue; |
90 | ||
2be7859f | 91 | /* Allocate memory for private structure */ |
5e6e3a92 BZ |
92 | adapter->priv[i] = kzalloc(sizeof(struct mwifiex_private), |
93 | GFP_KERNEL); | |
94 | if (!adapter->priv[i]) { | |
95 | dev_err(adapter->dev, "%s: failed to alloc priv[%d]\n", | |
96 | __func__, i); | |
97 | goto error; | |
98 | } | |
99 | ||
100 | adapter->priv_num++; | |
5e6e3a92 BZ |
101 | adapter->priv[i]->adapter = adapter; |
102 | /* Save bss_type, frame_type & bss_priority */ | |
2be7859f | 103 | adapter->priv[i]->bss_type = drv_mode_ptr->bss_attr[i].bss_type; |
5e6e3a92 | 104 | adapter->priv[i]->frame_type = |
2be7859f | 105 | drv_mode_ptr->bss_attr[i].frame_type; |
5e6e3a92 | 106 | adapter->priv[i]->bss_priority = |
2be7859f AK |
107 | drv_mode_ptr->bss_attr[i].bss_priority; |
108 | ||
109 | if (drv_mode_ptr->bss_attr[i].bss_type == MWIFIEX_BSS_TYPE_STA) | |
5e6e3a92 | 110 | adapter->priv[i]->bss_role = MWIFIEX_BSS_ROLE_STA; |
2be7859f AK |
111 | else if (drv_mode_ptr->bss_attr[i].bss_type == |
112 | MWIFIEX_BSS_TYPE_UAP) | |
5e6e3a92 BZ |
113 | adapter->priv[i]->bss_role = MWIFIEX_BSS_ROLE_UAP; |
114 | ||
115 | /* Save bss_index & bss_num */ | |
116 | adapter->priv[i]->bss_index = i; | |
2be7859f | 117 | adapter->priv[i]->bss_num = drv_mode_ptr->bss_attr[i].bss_num; |
5e6e3a92 | 118 | } |
2be7859f | 119 | adapter->drv_mode = drv_mode_ptr; |
5e6e3a92 | 120 | |
5e6e3a92 BZ |
121 | if (mwifiex_init_lock_list(adapter)) |
122 | goto error; | |
123 | ||
124 | init_timer(&adapter->cmd_timer); | |
125 | adapter->cmd_timer.function = mwifiex_cmd_timeout_func; | |
126 | adapter->cmd_timer.data = (unsigned long) adapter; | |
127 | ||
5e6e3a92 BZ |
128 | return 0; |
129 | ||
130 | error: | |
131 | dev_dbg(adapter->dev, "info: leave mwifiex_register with error\n"); | |
132 | ||
5e6e3a92 | 133 | mwifiex_free_lock_list(adapter); |
2be7859f | 134 | for (i = 0; i < drv_mode_ptr->intf_num; i++) |
5e6e3a92 BZ |
135 | kfree(adapter->priv[i]); |
136 | kfree(adapter); | |
137 | ||
138 | return -1; | |
139 | } | |
140 | ||
141 | /* | |
142 | * This function unregisters the device and performs all the necessary | |
143 | * cleanups. | |
144 | * | |
145 | * The following cleanup operations are performed - | |
146 | * - Free the timers | |
147 | * - Free beacon buffers | |
148 | * - Free private structures | |
149 | * - Free adapter structure | |
150 | */ | |
151 | static int mwifiex_unregister(struct mwifiex_adapter *adapter) | |
152 | { | |
153 | s32 i = 0; | |
154 | ||
155 | del_timer(&adapter->cmd_timer); | |
156 | ||
157 | /* Free private structures */ | |
158 | for (i = 0; i < adapter->priv_num; i++) { | |
159 | if (adapter->priv[i]) { | |
160 | mwifiex_free_curr_bcn(adapter->priv[i]); | |
161 | kfree(adapter->priv[i]); | |
162 | } | |
163 | } | |
164 | ||
165 | kfree(adapter); | |
166 | return 0; | |
167 | } | |
168 | ||
169 | /* | |
170 | * The main process. | |
171 | * | |
172 | * This function is the main procedure of the driver and handles various driver | |
173 | * operations. It runs in a loop and provides the core functionalities. | |
174 | * | |
175 | * The main responsibilities of this function are - | |
176 | * - Ensure concurrency control | |
177 | * - Handle pending interrupts and call interrupt handlers | |
178 | * - Wake up the card if required | |
179 | * - Handle command responses and call response handlers | |
180 | * - Handle events and call event handlers | |
181 | * - Execute pending commands | |
182 | * - Transmit pending data packets | |
183 | */ | |
184 | int mwifiex_main_process(struct mwifiex_adapter *adapter) | |
185 | { | |
186 | int ret = 0; | |
187 | unsigned long flags; | |
188 | ||
189 | spin_lock_irqsave(&adapter->main_proc_lock, flags); | |
190 | ||
191 | /* Check if already processing */ | |
192 | if (adapter->mwifiex_processing) { | |
193 | spin_unlock_irqrestore(&adapter->main_proc_lock, flags); | |
194 | goto exit_main_proc; | |
195 | } else { | |
196 | adapter->mwifiex_processing = true; | |
197 | spin_unlock_irqrestore(&adapter->main_proc_lock, flags); | |
198 | } | |
199 | process_start: | |
200 | do { | |
201 | if ((adapter->hw_status == MWIFIEX_HW_STATUS_CLOSING) || | |
202 | (adapter->hw_status == MWIFIEX_HW_STATUS_NOT_READY)) | |
203 | break; | |
204 | ||
205 | /* Handle pending interrupt if any */ | |
206 | if (adapter->int_status) { | |
207 | if (adapter->hs_activated) | |
208 | mwifiex_process_hs_config(adapter); | |
209 | adapter->if_ops.process_int_status(adapter); | |
210 | } | |
211 | ||
212 | /* Need to wake up the card ? */ | |
213 | if ((adapter->ps_state == PS_STATE_SLEEP) && | |
214 | (adapter->pm_wakeup_card_req && | |
215 | !adapter->pm_wakeup_fw_try) && | |
216 | (is_command_pending(adapter) | |
217 | || !mwifiex_wmm_lists_empty(adapter))) { | |
218 | adapter->pm_wakeup_fw_try = true; | |
219 | adapter->if_ops.wakeup(adapter); | |
220 | continue; | |
221 | } | |
222 | if (IS_CARD_RX_RCVD(adapter)) { | |
223 | adapter->pm_wakeup_fw_try = false; | |
224 | if (adapter->ps_state == PS_STATE_SLEEP) | |
225 | adapter->ps_state = PS_STATE_AWAKE; | |
226 | } else { | |
227 | /* We have tried to wakeup the card already */ | |
228 | if (adapter->pm_wakeup_fw_try) | |
229 | break; | |
230 | if (adapter->ps_state != PS_STATE_AWAKE || | |
231 | adapter->tx_lock_flag) | |
232 | break; | |
233 | ||
234 | if (adapter->scan_processing || adapter->data_sent | |
235 | || mwifiex_wmm_lists_empty(adapter)) { | |
236 | if (adapter->cmd_sent || adapter->curr_cmd | |
237 | || (!is_command_pending(adapter))) | |
238 | break; | |
239 | } | |
240 | } | |
241 | ||
242 | /* Check for Cmd Resp */ | |
243 | if (adapter->cmd_resp_received) { | |
244 | adapter->cmd_resp_received = false; | |
245 | mwifiex_process_cmdresp(adapter); | |
246 | ||
247 | /* call mwifiex back when init_fw is done */ | |
248 | if (adapter->hw_status == MWIFIEX_HW_STATUS_INIT_DONE) { | |
249 | adapter->hw_status = MWIFIEX_HW_STATUS_READY; | |
250 | mwifiex_init_fw_complete(adapter); | |
251 | } | |
252 | } | |
253 | ||
254 | /* Check for event */ | |
255 | if (adapter->event_received) { | |
256 | adapter->event_received = false; | |
257 | mwifiex_process_event(adapter); | |
258 | } | |
259 | ||
260 | /* Check if we need to confirm Sleep Request | |
261 | received previously */ | |
262 | if (adapter->ps_state == PS_STATE_PRE_SLEEP) { | |
263 | if (!adapter->cmd_sent && !adapter->curr_cmd) | |
264 | mwifiex_check_ps_cond(adapter); | |
265 | } | |
266 | ||
267 | /* * The ps_state may have been changed during processing of | |
268 | * Sleep Request event. | |
269 | */ | |
270 | if ((adapter->ps_state == PS_STATE_SLEEP) | |
271 | || (adapter->ps_state == PS_STATE_PRE_SLEEP) | |
272 | || (adapter->ps_state == PS_STATE_SLEEP_CFM) | |
273 | || adapter->tx_lock_flag) | |
274 | continue; | |
275 | ||
276 | if (!adapter->cmd_sent && !adapter->curr_cmd) { | |
277 | if (mwifiex_exec_next_cmd(adapter) == -1) { | |
278 | ret = -1; | |
279 | break; | |
280 | } | |
281 | } | |
282 | ||
283 | if (!adapter->scan_processing && !adapter->data_sent && | |
284 | !mwifiex_wmm_lists_empty(adapter)) { | |
285 | mwifiex_wmm_process_tx(adapter); | |
286 | if (adapter->hs_activated) { | |
287 | adapter->is_hs_configured = false; | |
288 | mwifiex_hs_activated_event | |
289 | (mwifiex_get_priv | |
290 | (adapter, MWIFIEX_BSS_ROLE_ANY), | |
291 | false); | |
292 | } | |
293 | } | |
294 | ||
295 | if (adapter->delay_null_pkt && !adapter->cmd_sent && | |
296 | !adapter->curr_cmd && !is_command_pending(adapter) | |
297 | && mwifiex_wmm_lists_empty(adapter)) { | |
298 | if (!mwifiex_send_null_packet | |
299 | (mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA), | |
300 | MWIFIEX_TxPD_POWER_MGMT_NULL_PACKET | | |
301 | MWIFIEX_TxPD_POWER_MGMT_LAST_PACKET)) { | |
302 | adapter->delay_null_pkt = false; | |
303 | adapter->ps_state = PS_STATE_SLEEP; | |
304 | } | |
305 | break; | |
306 | } | |
307 | } while (true); | |
308 | ||
309 | if ((adapter->int_status) || IS_CARD_RX_RCVD(adapter)) | |
310 | goto process_start; | |
311 | ||
312 | spin_lock_irqsave(&adapter->main_proc_lock, flags); | |
313 | adapter->mwifiex_processing = false; | |
314 | spin_unlock_irqrestore(&adapter->main_proc_lock, flags); | |
315 | ||
316 | exit_main_proc: | |
317 | if (adapter->hw_status == MWIFIEX_HW_STATUS_CLOSING) | |
318 | mwifiex_shutdown_drv(adapter); | |
319 | return ret; | |
320 | } | |
321 | ||
322 | /* | |
323 | * This function initializes the software. | |
324 | * | |
325 | * The main work includes allocating and initializing the adapter structure | |
326 | * and initializing the private structures. | |
327 | */ | |
328 | static int | |
2be7859f | 329 | mwifiex_init_sw(void *card, struct mwifiex_if_ops *if_ops) |
5e6e3a92 BZ |
330 | { |
331 | int i; | |
5e6e3a92 BZ |
332 | struct mwifiex_drv_mode *drv_mode_ptr; |
333 | ||
334 | /* find mwifiex_drv_mode entry from mwifiex_drv_mode_tbl */ | |
335 | drv_mode_ptr = NULL; | |
336 | for (i = 0; i < ARRAY_SIZE(mwifiex_drv_mode_tbl); i++) { | |
337 | if (mwifiex_drv_mode_tbl[i].drv_mode == drv_mode) { | |
338 | drv_mode_ptr = &mwifiex_drv_mode_tbl[i]; | |
339 | break; | |
340 | } | |
341 | } | |
342 | ||
343 | if (!drv_mode_ptr) { | |
344 | pr_err("invalid drv_mode=%d\n", drv_mode); | |
345 | return -1; | |
346 | } | |
347 | ||
2be7859f | 348 | if (mwifiex_register(card, if_ops, drv_mode_ptr)) |
5e6e3a92 BZ |
349 | return -1; |
350 | ||
351 | return 0; | |
352 | } | |
353 | ||
354 | /* | |
355 | * This function frees the adapter structure. | |
356 | * | |
357 | * Additionally, this closes the netlink socket, frees the timers | |
358 | * and private structures. | |
359 | */ | |
360 | static void mwifiex_free_adapter(struct mwifiex_adapter *adapter) | |
361 | { | |
362 | if (!adapter) { | |
363 | pr_err("%s: adapter is NULL\n", __func__); | |
364 | return; | |
365 | } | |
366 | ||
367 | mwifiex_unregister(adapter); | |
368 | pr_debug("info: %s: free adapter\n", __func__); | |
369 | } | |
370 | ||
371 | /* | |
372 | * This function initializes the hardware and firmware. | |
373 | * | |
374 | * The main initialization steps followed are - | |
375 | * - Download the correct firmware to card | |
376 | * - Allocate and initialize the adapter structure | |
377 | * - Initialize the private structures | |
378 | * - Issue the init commands to firmware | |
379 | */ | |
380 | static int mwifiex_init_hw_fw(struct mwifiex_adapter *adapter) | |
381 | { | |
382 | int ret = 0; | |
383 | int err; | |
384 | struct mwifiex_fw_image fw; | |
385 | ||
386 | memset(&fw, 0, sizeof(struct mwifiex_fw_image)); | |
387 | ||
388 | switch (adapter->revision_id) { | |
389 | case SD8787_W0: | |
390 | case SD8787_W1: | |
391 | strcpy(fw_name, SD8787_W1_FW_NAME); | |
392 | break; | |
393 | case SD8787_A0: | |
394 | case SD8787_A1: | |
395 | strcpy(fw_name, SD8787_AX_FW_NAME); | |
396 | break; | |
397 | default: | |
398 | break; | |
399 | } | |
400 | ||
401 | err = request_firmware(&adapter->firmware, fw_name, adapter->dev); | |
402 | if (err < 0) { | |
403 | dev_err(adapter->dev, "request_firmware() returned" | |
404 | " error code %#x\n", err); | |
405 | ret = -1; | |
406 | goto done; | |
407 | } | |
408 | fw.fw_buf = (u8 *) adapter->firmware->data; | |
409 | fw.fw_len = adapter->firmware->size; | |
410 | ||
411 | ret = mwifiex_dnld_fw(adapter, &fw); | |
412 | if (ret == -1) | |
413 | goto done; | |
414 | ||
415 | dev_notice(adapter->dev, "WLAN FW is active\n"); | |
416 | ||
417 | adapter->init_wait_q_woken = false; | |
418 | ret = mwifiex_init_fw(adapter); | |
419 | if (ret == -1) { | |
420 | goto done; | |
421 | } else if (!ret) { | |
422 | adapter->hw_status = MWIFIEX_HW_STATUS_READY; | |
423 | goto done; | |
424 | } | |
425 | /* Wait for mwifiex_init to complete */ | |
426 | wait_event_interruptible(adapter->init_wait_q, | |
427 | adapter->init_wait_q_woken); | |
428 | if (adapter->hw_status != MWIFIEX_HW_STATUS_READY) { | |
429 | ret = -1; | |
430 | goto done; | |
431 | } | |
432 | ret = 0; | |
433 | ||
434 | done: | |
435 | if (adapter->firmware) | |
436 | release_firmware(adapter->firmware); | |
437 | if (ret) | |
438 | ret = -1; | |
439 | return ret; | |
440 | } | |
441 | ||
442 | /* | |
443 | * This function fills a driver buffer. | |
444 | * | |
445 | * The function associates a given SKB with the provided driver buffer | |
446 | * and also updates some of the SKB parameters, including IP header, | |
447 | * priority and timestamp. | |
448 | */ | |
449 | static void | |
450 | mwifiex_fill_buffer(struct sk_buff *skb) | |
451 | { | |
452 | struct ethhdr *eth = NULL; | |
453 | struct iphdr *iph; | |
454 | struct timeval tv; | |
455 | u8 tid = 0; | |
456 | ||
457 | eth = (struct ethhdr *) skb->data; | |
458 | switch (eth->h_proto) { | |
459 | case __constant_htons(ETH_P_IP): | |
460 | iph = ip_hdr(skb); | |
461 | tid = IPTOS_PREC(iph->tos); | |
462 | pr_debug("data: packet type ETH_P_IP: %04x, tid=%#x prio=%#x\n", | |
463 | eth->h_proto, tid, skb->priority); | |
464 | break; | |
465 | case __constant_htons(ETH_P_ARP): | |
466 | pr_debug("data: ARP packet: %04x\n", eth->h_proto); | |
467 | default: | |
468 | break; | |
469 | } | |
470 | /* Offset for TOS field in the IP header */ | |
471 | #define IPTOS_OFFSET 5 | |
472 | tid = (tid >> IPTOS_OFFSET); | |
473 | skb->priority = tid; | |
474 | /* Record the current time the packet was queued; used to | |
475 | determine the amount of time the packet was queued in | |
476 | the driver before it was sent to the firmware. | |
477 | The delay is then sent along with the packet to the | |
478 | firmware for aggregate delay calculation for stats and | |
479 | MSDU lifetime expiry. | |
480 | */ | |
481 | do_gettimeofday(&tv); | |
482 | skb->tstamp = timeval_to_ktime(tv); | |
5e6e3a92 BZ |
483 | } |
484 | ||
485 | /* | |
486 | * CFG802.11 network device handler for open. | |
487 | * | |
488 | * Starts the data queue. | |
489 | */ | |
490 | static int | |
491 | mwifiex_open(struct net_device *dev) | |
492 | { | |
493 | netif_start_queue(dev); | |
494 | return 0; | |
495 | } | |
496 | ||
497 | /* | |
498 | * CFG802.11 network device handler for close. | |
499 | */ | |
500 | static int | |
501 | mwifiex_close(struct net_device *dev) | |
502 | { | |
503 | return 0; | |
504 | } | |
505 | ||
506 | /* | |
507 | * CFG802.11 network device handler for data transmission. | |
508 | */ | |
509 | static int | |
510 | mwifiex_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
511 | { | |
512 | struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev); | |
513 | struct sk_buff *new_skb = NULL; | |
514 | struct mwifiex_txinfo *tx_info; | |
515 | ||
516 | dev_dbg(priv->adapter->dev, "data: %lu BSS(%d): Data <= kernel\n", | |
517 | jiffies, priv->bss_index); | |
518 | ||
519 | if (priv->adapter->surprise_removed) { | |
520 | kfree(skb); | |
521 | priv->stats.tx_dropped++; | |
522 | return 0; | |
523 | } | |
524 | if (!skb->len || (skb->len > ETH_FRAME_LEN)) { | |
525 | dev_err(priv->adapter->dev, "Tx: bad skb len %d\n", skb->len); | |
526 | kfree(skb); | |
527 | priv->stats.tx_dropped++; | |
528 | return 0; | |
529 | } | |
530 | if (skb_headroom(skb) < MWIFIEX_MIN_DATA_HEADER_LEN) { | |
531 | dev_dbg(priv->adapter->dev, | |
532 | "data: Tx: insufficient skb headroom %d\n", | |
533 | skb_headroom(skb)); | |
534 | /* Insufficient skb headroom - allocate a new skb */ | |
535 | new_skb = | |
536 | skb_realloc_headroom(skb, MWIFIEX_MIN_DATA_HEADER_LEN); | |
537 | if (unlikely(!new_skb)) { | |
538 | dev_err(priv->adapter->dev, "Tx: cannot alloca new_skb\n"); | |
539 | kfree(skb); | |
540 | priv->stats.tx_dropped++; | |
541 | return 0; | |
542 | } | |
543 | kfree_skb(skb); | |
544 | skb = new_skb; | |
545 | dev_dbg(priv->adapter->dev, "info: new skb headroomd %d\n", | |
546 | skb_headroom(skb)); | |
547 | } | |
548 | ||
549 | tx_info = MWIFIEX_SKB_TXCB(skb); | |
550 | tx_info->bss_index = priv->bss_index; | |
551 | mwifiex_fill_buffer(skb); | |
552 | ||
553 | mwifiex_wmm_add_buf_txqueue(priv->adapter, skb); | |
554 | atomic_inc(&priv->adapter->tx_pending); | |
555 | ||
556 | if (atomic_read(&priv->adapter->tx_pending) >= MAX_TX_PENDING) { | |
557 | netif_stop_queue(priv->netdev); | |
558 | dev->trans_start = jiffies; | |
559 | } | |
560 | ||
561 | queue_work(priv->adapter->workqueue, &priv->adapter->main_work); | |
562 | ||
563 | return 0; | |
564 | } | |
565 | ||
566 | /* | |
567 | * CFG802.11 network device handler for setting MAC address. | |
568 | */ | |
569 | static int | |
570 | mwifiex_set_mac_address(struct net_device *dev, void *addr) | |
571 | { | |
572 | struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev); | |
573 | struct sockaddr *hw_addr = (struct sockaddr *) addr; | |
600f5d90 | 574 | int ret = 0; |
5e6e3a92 BZ |
575 | |
576 | memcpy(priv->curr_addr, hw_addr->sa_data, ETH_ALEN); | |
577 | ||
600f5d90 AK |
578 | /* Send request to firmware */ |
579 | ret = mwifiex_send_cmd_sync(priv, HostCmd_CMD_802_11_MAC_ADDRESS, | |
580 | HostCmd_ACT_GEN_SET, 0, NULL); | |
581 | ||
582 | if (!ret) | |
583 | memcpy(priv->netdev->dev_addr, priv->curr_addr, ETH_ALEN); | |
584 | else | |
585 | dev_err(priv->adapter->dev, "set mac address failed: ret=%d" | |
586 | "\n", ret); | |
587 | ||
5e6e3a92 BZ |
588 | memcpy(dev->dev_addr, priv->curr_addr, ETH_ALEN); |
589 | ||
600f5d90 | 590 | return ret; |
5e6e3a92 BZ |
591 | } |
592 | ||
593 | /* | |
594 | * CFG802.11 network device handler for setting multicast list. | |
595 | */ | |
596 | static void mwifiex_set_multicast_list(struct net_device *dev) | |
597 | { | |
598 | struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev); | |
600f5d90 AK |
599 | struct mwifiex_multicast_list mcast_list; |
600 | ||
601 | if (dev->flags & IFF_PROMISC) { | |
602 | mcast_list.mode = MWIFIEX_PROMISC_MODE; | |
603 | } else if (dev->flags & IFF_ALLMULTI || | |
604 | netdev_mc_count(dev) > MWIFIEX_MAX_MULTICAST_LIST_SIZE) { | |
605 | mcast_list.mode = MWIFIEX_ALL_MULTI_MODE; | |
606 | } else { | |
607 | mcast_list.mode = MWIFIEX_MULTICAST_MODE; | |
608 | if (netdev_mc_count(dev)) | |
609 | mcast_list.num_multicast_addr = | |
610 | mwifiex_copy_mcast_addr(&mcast_list, dev); | |
611 | } | |
612 | mwifiex_request_set_multicast_list(priv, &mcast_list); | |
5e6e3a92 BZ |
613 | } |
614 | ||
615 | /* | |
616 | * CFG802.11 network device handler for transmission timeout. | |
617 | */ | |
618 | static void | |
619 | mwifiex_tx_timeout(struct net_device *dev) | |
620 | { | |
621 | struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev); | |
622 | ||
623 | dev_err(priv->adapter->dev, "%lu : Tx timeout, bss_index=%d\n", | |
624 | jiffies, priv->bss_index); | |
625 | dev->trans_start = jiffies; | |
626 | priv->num_tx_timeout++; | |
627 | } | |
628 | ||
629 | /* | |
630 | * CFG802.11 network device handler for statistics retrieval. | |
631 | */ | |
632 | static struct net_device_stats *mwifiex_get_stats(struct net_device *dev) | |
633 | { | |
634 | struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev); | |
635 | ||
636 | return &priv->stats; | |
637 | } | |
638 | ||
639 | /* Network device handlers */ | |
640 | static const struct net_device_ops mwifiex_netdev_ops = { | |
641 | .ndo_open = mwifiex_open, | |
642 | .ndo_stop = mwifiex_close, | |
643 | .ndo_start_xmit = mwifiex_hard_start_xmit, | |
644 | .ndo_set_mac_address = mwifiex_set_mac_address, | |
645 | .ndo_tx_timeout = mwifiex_tx_timeout, | |
646 | .ndo_get_stats = mwifiex_get_stats, | |
647 | .ndo_set_multicast_list = mwifiex_set_multicast_list, | |
648 | }; | |
649 | ||
650 | /* | |
651 | * This function initializes the private structure parameters. | |
652 | * | |
653 | * The following wait queues are initialized - | |
654 | * - IOCTL wait queue | |
655 | * - Command wait queue | |
656 | * - Statistics wait queue | |
657 | * | |
658 | * ...and the following default parameters are set - | |
659 | * - Current key index : Set to 0 | |
660 | * - Rate index : Set to auto | |
661 | * - Media connected : Set to disconnected | |
662 | * - Adhoc link sensed : Set to false | |
663 | * - Nick name : Set to null | |
664 | * - Number of Tx timeout : Set to 0 | |
665 | * - Device address : Set to current address | |
666 | * | |
667 | * In addition, the CFG80211 work queue is also created. | |
668 | */ | |
669 | static void | |
670 | mwifiex_init_priv_params(struct mwifiex_private *priv, struct net_device *dev) | |
671 | { | |
672 | dev->netdev_ops = &mwifiex_netdev_ops; | |
673 | /* Initialize private structure */ | |
5e6e3a92 BZ |
674 | priv->current_key_index = 0; |
675 | priv->media_connected = false; | |
676 | memset(&priv->nick_name, 0, sizeof(priv->nick_name)); | |
677 | priv->num_tx_timeout = 0; | |
678 | priv->workqueue = create_singlethread_workqueue("cfg80211_wq"); | |
679 | INIT_WORK(&priv->cfg_workqueue, mwifiex_cfg80211_results); | |
680 | memcpy(dev->dev_addr, priv->curr_addr, ETH_ALEN); | |
681 | } | |
682 | ||
683 | /* | |
684 | * This function adds a new logical interface. | |
685 | * | |
686 | * It allocates, initializes and registers the interface by performing | |
687 | * the following opearations - | |
688 | * - Allocate a new net device structure | |
689 | * - Assign device name | |
690 | * - Register the new device with CFG80211 subsystem | |
691 | * - Initialize semaphore and private structure | |
692 | * - Register the new device with kernel | |
693 | * - Create the complete debug FS structure if configured | |
694 | */ | |
695 | static struct mwifiex_private *mwifiex_add_interface( | |
696 | struct mwifiex_adapter *adapter, | |
697 | u8 bss_index, u8 bss_type) | |
698 | { | |
699 | struct net_device *dev = NULL; | |
700 | struct mwifiex_private *priv = NULL; | |
701 | void *mdev_priv = NULL; | |
702 | ||
703 | dev = alloc_netdev_mq(sizeof(struct mwifiex_private *), "mlan%d", | |
704 | ether_setup, 1); | |
705 | if (!dev) { | |
706 | dev_err(adapter->dev, "no memory available for netdevice\n"); | |
707 | goto error; | |
708 | } | |
709 | if (dev_alloc_name(dev, dev->name)) { | |
710 | dev_err(adapter->dev, "unable to alloc name for netdevice\n"); | |
711 | goto error; | |
712 | } | |
713 | ||
714 | if (mwifiex_register_cfg80211(dev, adapter->priv[bss_index]->curr_addr, | |
715 | adapter->priv[bss_index]) != 0) { | |
716 | dev_err(adapter->dev, "cannot register netdevice with cfg80211\n"); | |
717 | goto error; | |
718 | } | |
719 | /* Save the priv pointer in netdev */ | |
720 | priv = adapter->priv[bss_index]; | |
721 | mdev_priv = netdev_priv(dev); | |
722 | *((unsigned long *) mdev_priv) = (unsigned long) priv; | |
723 | ||
724 | priv->netdev = dev; | |
725 | ||
726 | sema_init(&priv->async_sem, 1); | |
727 | priv->scan_pending_on_block = false; | |
728 | ||
729 | mwifiex_init_priv_params(priv, dev); | |
730 | ||
731 | SET_NETDEV_DEV(dev, adapter->dev); | |
732 | ||
733 | /* Register network device */ | |
734 | if (register_netdev(dev)) { | |
735 | dev_err(adapter->dev, "cannot register virtual network device\n"); | |
736 | goto error; | |
737 | } | |
738 | ||
739 | dev_dbg(adapter->dev, "info: %s: Marvell 802.11 Adapter\n", dev->name); | |
740 | #ifdef CONFIG_DEBUG_FS | |
741 | mwifiex_dev_debugfs_init(priv); | |
742 | #endif | |
743 | return priv; | |
744 | error: | |
745 | if (dev) | |
746 | free_netdev(dev); | |
747 | return NULL; | |
748 | } | |
749 | ||
750 | /* | |
751 | * This function removes a logical interface. | |
752 | * | |
753 | * It deregisters, resets and frees the interface by performing | |
754 | * the following operations - | |
755 | * - Disconnect the device if connected, send wireless event to | |
756 | * notify applications. | |
757 | * - Remove the debug FS structure if configured | |
758 | * - Unregister the device from kernel | |
759 | * - Free the net device structure | |
760 | * - Cancel all works and destroy work queue | |
761 | * - Unregister and free the wireless device from CFG80211 subsystem | |
762 | */ | |
763 | static void | |
764 | mwifiex_remove_interface(struct mwifiex_adapter *adapter, u8 bss_index) | |
765 | { | |
766 | struct net_device *dev = NULL; | |
767 | struct mwifiex_private *priv = adapter->priv[bss_index]; | |
768 | ||
769 | if (!priv) | |
770 | return; | |
771 | dev = priv->netdev; | |
772 | ||
773 | if (priv->media_connected) | |
774 | priv->media_connected = false; | |
775 | ||
776 | #ifdef CONFIG_DEBUG_FS | |
777 | mwifiex_dev_debugfs_remove(priv); | |
778 | #endif | |
779 | /* Last reference is our one */ | |
780 | dev_dbg(adapter->dev, "info: %s: refcnt = %d\n", | |
781 | dev->name, netdev_refcnt_read(dev)); | |
782 | ||
783 | if (dev->reg_state == NETREG_REGISTERED) | |
784 | unregister_netdev(dev); | |
785 | ||
786 | /* Clear the priv in adapter */ | |
787 | priv->netdev = NULL; | |
788 | if (dev) | |
789 | free_netdev(dev); | |
790 | ||
791 | cancel_work_sync(&priv->cfg_workqueue); | |
792 | flush_workqueue(priv->workqueue); | |
793 | destroy_workqueue(priv->workqueue); | |
794 | wiphy_unregister(priv->wdev->wiphy); | |
795 | wiphy_free(priv->wdev->wiphy); | |
796 | kfree(priv->wdev); | |
5e6e3a92 BZ |
797 | } |
798 | ||
5e6e3a92 BZ |
799 | /* |
800 | * This function check if command is pending. | |
801 | */ | |
802 | int is_command_pending(struct mwifiex_adapter *adapter) | |
803 | { | |
804 | unsigned long flags; | |
805 | int is_cmd_pend_q_empty; | |
806 | ||
807 | spin_lock_irqsave(&adapter->cmd_pending_q_lock, flags); | |
808 | is_cmd_pend_q_empty = list_empty(&adapter->cmd_pending_q); | |
809 | spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, flags); | |
810 | ||
811 | return !is_cmd_pend_q_empty; | |
812 | } | |
813 | ||
814 | /* | |
815 | * This function returns the correct private structure pointer based | |
816 | * upon the BSS number. | |
817 | */ | |
818 | struct mwifiex_private * | |
819 | mwifiex_bss_index_to_priv(struct mwifiex_adapter *adapter, u8 bss_index) | |
820 | { | |
821 | if (!adapter || (bss_index >= adapter->priv_num)) | |
822 | return NULL; | |
823 | return adapter->priv[bss_index]; | |
824 | } | |
825 | ||
826 | /* | |
827 | * This is the main work queue function. | |
828 | * | |
829 | * It handles the main process, which in turn handles the complete | |
830 | * driver operations. | |
831 | */ | |
832 | static void mwifiex_main_work_queue(struct work_struct *work) | |
833 | { | |
834 | struct mwifiex_adapter *adapter = | |
835 | container_of(work, struct mwifiex_adapter, main_work); | |
836 | ||
837 | if (adapter->surprise_removed) | |
838 | return; | |
839 | mwifiex_main_process(adapter); | |
840 | } | |
841 | ||
842 | /* | |
843 | * This function cancels all works in the queue and destroys | |
844 | * the main workqueue. | |
845 | */ | |
846 | static void | |
847 | mwifiex_terminate_workqueue(struct mwifiex_adapter *adapter) | |
848 | { | |
849 | flush_workqueue(adapter->workqueue); | |
850 | destroy_workqueue(adapter->workqueue); | |
851 | adapter->workqueue = NULL; | |
852 | } | |
853 | ||
854 | /* | |
855 | * This function adds the card. | |
856 | * | |
857 | * This function follows the following major steps to set up the device - | |
858 | * - Initialize software. This includes probing the card, registering | |
859 | * the interface operations table, and allocating/initializing the | |
860 | * adapter structure | |
861 | * - Set up the netlink socket | |
862 | * - Create and start the main work queue | |
863 | * - Register the device | |
864 | * - Initialize firmware and hardware | |
865 | * - Add logical interfaces | |
866 | */ | |
867 | int | |
868 | mwifiex_add_card(void *card, struct semaphore *sem, | |
869 | struct mwifiex_if_ops *if_ops) | |
870 | { | |
5e6e3a92 | 871 | int i; |
2be7859f | 872 | struct mwifiex_adapter *adapter; |
5e6e3a92 BZ |
873 | |
874 | if (down_interruptible(sem)) | |
875 | goto exit_sem_err; | |
876 | ||
2be7859f | 877 | if (mwifiex_init_sw(card, if_ops)) { |
5e6e3a92 BZ |
878 | pr_err("%s: software init failed\n", __func__); |
879 | goto err_init_sw; | |
880 | } | |
881 | ||
2be7859f | 882 | adapter = g_adapter; |
5e6e3a92 BZ |
883 | |
884 | adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING; | |
5e6e3a92 BZ |
885 | adapter->surprise_removed = false; |
886 | init_waitqueue_head(&adapter->init_wait_q); | |
887 | adapter->is_suspended = false; | |
888 | adapter->hs_activated = false; | |
889 | init_waitqueue_head(&adapter->hs_activate_wait_q); | |
600f5d90 AK |
890 | adapter->cmd_wait_q_required = false; |
891 | init_waitqueue_head(&adapter->cmd_wait_q.wait); | |
892 | adapter->cmd_wait_q.condition = false; | |
893 | adapter->cmd_wait_q.status = 0; | |
5e6e3a92 | 894 | |
5e6e3a92 BZ |
895 | adapter->workqueue = create_workqueue("MWIFIEX_WORK_QUEUE"); |
896 | if (!adapter->workqueue) | |
897 | goto err_kmalloc; | |
898 | ||
899 | INIT_WORK(&adapter->main_work, mwifiex_main_work_queue); | |
900 | ||
901 | /* Register the device. Fill up the private data structure with relevant | |
902 | information from the card and request for the required IRQ. */ | |
903 | if (adapter->if_ops.register_dev(adapter)) { | |
904 | pr_err("%s: failed to register mwifiex device\n", __func__); | |
905 | goto err_registerdev; | |
906 | } | |
907 | ||
5e6e3a92 BZ |
908 | if (mwifiex_init_hw_fw(adapter)) { |
909 | pr_err("%s: firmware init failed\n", __func__); | |
910 | goto err_init_fw; | |
911 | } | |
2be7859f | 912 | |
5e6e3a92 | 913 | /* Add interfaces */ |
2be7859f | 914 | for (i = 0; i < adapter->drv_mode->intf_num; i++) { |
5e6e3a92 BZ |
915 | if (!mwifiex_add_interface(adapter, i, |
916 | adapter->drv_mode->bss_attr[i].bss_type)) { | |
636c4598 | 917 | goto err_add_intf; |
5e6e3a92 BZ |
918 | } |
919 | } | |
5e6e3a92 BZ |
920 | |
921 | up(sem); | |
922 | ||
923 | return 0; | |
924 | ||
925 | err_add_intf: | |
926 | for (i = 0; i < adapter->priv_num; i++) | |
927 | mwifiex_remove_interface(adapter, i); | |
928 | err_init_fw: | |
5e6e3a92 BZ |
929 | pr_debug("info: %s: unregister device\n", __func__); |
930 | adapter->if_ops.unregister_dev(adapter); | |
931 | err_registerdev: | |
932 | adapter->surprise_removed = true; | |
933 | mwifiex_terminate_workqueue(adapter); | |
934 | err_kmalloc: | |
935 | if ((adapter->hw_status == MWIFIEX_HW_STATUS_FW_READY) || | |
936 | (adapter->hw_status == MWIFIEX_HW_STATUS_READY)) { | |
937 | pr_debug("info: %s: shutdown mwifiex\n", __func__); | |
938 | adapter->init_wait_q_woken = false; | |
636c4598 YAP |
939 | |
940 | if (mwifiex_shutdown_drv(adapter) == -EINPROGRESS) | |
5e6e3a92 BZ |
941 | wait_event_interruptible(adapter->init_wait_q, |
942 | adapter->init_wait_q_woken); | |
943 | } | |
944 | ||
945 | mwifiex_free_adapter(adapter); | |
946 | ||
947 | err_init_sw: | |
948 | up(sem); | |
949 | ||
950 | exit_sem_err: | |
951 | return -1; | |
952 | } | |
953 | EXPORT_SYMBOL_GPL(mwifiex_add_card); | |
954 | ||
955 | /* | |
956 | * This function removes the card. | |
957 | * | |
958 | * This function follows the following major steps to remove the device - | |
959 | * - Stop data traffic | |
960 | * - Shutdown firmware | |
961 | * - Remove the logical interfaces | |
962 | * - Terminate the work queue | |
963 | * - Unregister the device | |
964 | * - Free the adapter structure | |
965 | */ | |
966 | int mwifiex_remove_card(struct mwifiex_adapter *adapter, struct semaphore *sem) | |
967 | { | |
968 | struct mwifiex_private *priv = NULL; | |
5e6e3a92 BZ |
969 | int i; |
970 | ||
971 | if (down_interruptible(sem)) | |
972 | goto exit_sem_err; | |
973 | ||
974 | if (!adapter) | |
975 | goto exit_remove; | |
976 | ||
977 | adapter->surprise_removed = true; | |
978 | ||
979 | /* Stop data */ | |
980 | for (i = 0; i < adapter->priv_num; i++) { | |
981 | priv = adapter->priv[i]; | |
982 | if (priv) { | |
983 | if (!netif_queue_stopped(priv->netdev)) | |
984 | netif_stop_queue(priv->netdev); | |
985 | if (netif_carrier_ok(priv->netdev)) | |
986 | netif_carrier_off(priv->netdev); | |
987 | } | |
988 | } | |
989 | ||
990 | dev_dbg(adapter->dev, "cmd: calling mwifiex_shutdown_drv...\n"); | |
991 | adapter->init_wait_q_woken = false; | |
636c4598 YAP |
992 | |
993 | if (mwifiex_shutdown_drv(adapter) == -EINPROGRESS) | |
5e6e3a92 BZ |
994 | wait_event_interruptible(adapter->init_wait_q, |
995 | adapter->init_wait_q_woken); | |
996 | dev_dbg(adapter->dev, "cmd: mwifiex_shutdown_drv done\n"); | |
997 | if (atomic_read(&adapter->rx_pending) || | |
998 | atomic_read(&adapter->tx_pending) || | |
600f5d90 | 999 | atomic_read(&adapter->cmd_pending)) { |
5e6e3a92 | 1000 | dev_err(adapter->dev, "rx_pending=%d, tx_pending=%d, " |
600f5d90 | 1001 | "cmd_pending=%d\n", |
5e6e3a92 BZ |
1002 | atomic_read(&adapter->rx_pending), |
1003 | atomic_read(&adapter->tx_pending), | |
600f5d90 | 1004 | atomic_read(&adapter->cmd_pending)); |
5e6e3a92 BZ |
1005 | } |
1006 | ||
1007 | /* Remove interface */ | |
1008 | for (i = 0; i < adapter->priv_num; i++) | |
1009 | mwifiex_remove_interface(adapter, i); | |
1010 | ||
1011 | mwifiex_terminate_workqueue(adapter); | |
1012 | ||
1013 | /* Unregister device */ | |
1014 | dev_dbg(adapter->dev, "info: unregister device\n"); | |
1015 | adapter->if_ops.unregister_dev(adapter); | |
1016 | /* Free adapter structure */ | |
1017 | dev_dbg(adapter->dev, "info: free adapter\n"); | |
1018 | mwifiex_free_adapter(adapter); | |
1019 | ||
1020 | exit_remove: | |
1021 | up(sem); | |
1022 | exit_sem_err: | |
1023 | return 0; | |
1024 | } | |
1025 | EXPORT_SYMBOL_GPL(mwifiex_remove_card); | |
1026 | ||
1027 | /* | |
1028 | * This function initializes the module. | |
1029 | * | |
1030 | * The debug FS is also initialized if configured. | |
1031 | */ | |
1032 | static int | |
1033 | mwifiex_init_module(void) | |
1034 | { | |
1035 | #ifdef CONFIG_DEBUG_FS | |
1036 | mwifiex_debugfs_init(); | |
1037 | #endif | |
1038 | return 0; | |
1039 | } | |
1040 | ||
1041 | /* | |
1042 | * This function cleans up the module. | |
1043 | * | |
1044 | * The debug FS is removed if available. | |
1045 | */ | |
1046 | static void | |
1047 | mwifiex_cleanup_module(void) | |
1048 | { | |
1049 | #ifdef CONFIG_DEBUG_FS | |
1050 | mwifiex_debugfs_remove(); | |
1051 | #endif | |
1052 | } | |
1053 | ||
1054 | module_init(mwifiex_init_module); | |
1055 | module_exit(mwifiex_cleanup_module); | |
1056 | ||
1057 | MODULE_AUTHOR("Marvell International Ltd."); | |
1058 | MODULE_DESCRIPTION("Marvell WiFi-Ex Driver version " VERSION); | |
1059 | MODULE_VERSION(VERSION); | |
1060 | MODULE_LICENSE("GPL v2"); |