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 | static struct mwifiex_bss_attr mwifiex_bss_sta[] = { |
30 | {MWIFIEX_BSS_TYPE_STA, MWIFIEX_DATA_FRAME_TYPE_ETH_II, true, 0, 0}, | |
31 | }; | |
32 | ||
33 | static int drv_mode = DRV_MODE_STA; | |
34 | ||
5e6e3a92 BZ |
35 | /* Supported drv_mode table */ |
36 | static struct mwifiex_drv_mode mwifiex_drv_mode_tbl[] = { | |
37 | { | |
2be7859f AK |
38 | .drv_mode = DRV_MODE_STA, |
39 | .intf_num = ARRAY_SIZE(mwifiex_bss_sta), | |
40 | .bss_attr = mwifiex_bss_sta, | |
41 | }, | |
5e6e3a92 BZ |
42 | }; |
43 | ||
44 | /* | |
45 | * This function registers the device and performs all the necessary | |
46 | * initializations. | |
47 | * | |
48 | * The following initialization operations are performed - | |
49 | * - Allocate adapter structure | |
50 | * - Save interface specific operations table in adapter | |
51 | * - Call interface specific initialization routine | |
52 | * - Allocate private structures | |
53 | * - Set default adapter structure parameters | |
54 | * - Initialize locks | |
55 | * | |
56 | * In case of any errors during inittialization, this function also ensures | |
57 | * proper cleanup before exiting. | |
58 | */ | |
59 | static int mwifiex_register(void *card, struct mwifiex_if_ops *if_ops, | |
287546df AK |
60 | struct mwifiex_drv_mode *drv_mode_ptr, |
61 | void **padapter) | |
5e6e3a92 | 62 | { |
2be7859f AK |
63 | struct mwifiex_adapter *adapter; |
64 | int i; | |
5e6e3a92 BZ |
65 | |
66 | adapter = kzalloc(sizeof(struct mwifiex_adapter), GFP_KERNEL); | |
5e6e3a92 | 67 | if (!adapter) |
b53575ec | 68 | return -ENOMEM; |
5e6e3a92 | 69 | |
287546df | 70 | *padapter = adapter; |
5e6e3a92 BZ |
71 | adapter->card = card; |
72 | ||
73 | /* Save interface specific operations in adapter */ | |
74 | memmove(&adapter->if_ops, if_ops, sizeof(struct mwifiex_if_ops)); | |
75 | ||
76 | /* card specific initialization has been deferred until now .. */ | |
636c4598 | 77 | if (adapter->if_ops.init_if(adapter)) |
5e6e3a92 BZ |
78 | goto error; |
79 | ||
80 | adapter->priv_num = 0; | |
2be7859f | 81 | for (i = 0; i < drv_mode_ptr->intf_num; i++) { |
5e6e3a92 BZ |
82 | adapter->priv[i] = NULL; |
83 | ||
2be7859f | 84 | if (!drv_mode_ptr->bss_attr[i].active) |
5e6e3a92 BZ |
85 | continue; |
86 | ||
2be7859f | 87 | /* Allocate memory for private structure */ |
5e6e3a92 BZ |
88 | adapter->priv[i] = kzalloc(sizeof(struct mwifiex_private), |
89 | GFP_KERNEL); | |
90 | if (!adapter->priv[i]) { | |
91 | dev_err(adapter->dev, "%s: failed to alloc priv[%d]\n", | |
92 | __func__, i); | |
93 | goto error; | |
94 | } | |
95 | ||
96 | adapter->priv_num++; | |
5e6e3a92 BZ |
97 | adapter->priv[i]->adapter = adapter; |
98 | /* Save bss_type, frame_type & bss_priority */ | |
2be7859f | 99 | adapter->priv[i]->bss_type = drv_mode_ptr->bss_attr[i].bss_type; |
5e6e3a92 | 100 | adapter->priv[i]->frame_type = |
2be7859f | 101 | drv_mode_ptr->bss_attr[i].frame_type; |
5e6e3a92 | 102 | adapter->priv[i]->bss_priority = |
2be7859f AK |
103 | drv_mode_ptr->bss_attr[i].bss_priority; |
104 | ||
105 | if (drv_mode_ptr->bss_attr[i].bss_type == MWIFIEX_BSS_TYPE_STA) | |
5e6e3a92 | 106 | adapter->priv[i]->bss_role = MWIFIEX_BSS_ROLE_STA; |
2be7859f AK |
107 | else if (drv_mode_ptr->bss_attr[i].bss_type == |
108 | MWIFIEX_BSS_TYPE_UAP) | |
5e6e3a92 BZ |
109 | adapter->priv[i]->bss_role = MWIFIEX_BSS_ROLE_UAP; |
110 | ||
111 | /* Save bss_index & bss_num */ | |
112 | adapter->priv[i]->bss_index = i; | |
2be7859f | 113 | adapter->priv[i]->bss_num = drv_mode_ptr->bss_attr[i].bss_num; |
5e6e3a92 | 114 | } |
2be7859f | 115 | adapter->drv_mode = drv_mode_ptr; |
5e6e3a92 | 116 | |
5e6e3a92 BZ |
117 | if (mwifiex_init_lock_list(adapter)) |
118 | goto error; | |
119 | ||
120 | init_timer(&adapter->cmd_timer); | |
121 | adapter->cmd_timer.function = mwifiex_cmd_timeout_func; | |
122 | adapter->cmd_timer.data = (unsigned long) adapter; | |
123 | ||
5e6e3a92 BZ |
124 | return 0; |
125 | ||
126 | error: | |
127 | dev_dbg(adapter->dev, "info: leave mwifiex_register with error\n"); | |
128 | ||
5e6e3a92 | 129 | mwifiex_free_lock_list(adapter); |
2be7859f | 130 | for (i = 0; i < drv_mode_ptr->intf_num; i++) |
5e6e3a92 BZ |
131 | kfree(adapter->priv[i]); |
132 | kfree(adapter); | |
133 | ||
134 | return -1; | |
135 | } | |
136 | ||
137 | /* | |
138 | * This function unregisters the device and performs all the necessary | |
139 | * cleanups. | |
140 | * | |
141 | * The following cleanup operations are performed - | |
142 | * - Free the timers | |
143 | * - Free beacon buffers | |
144 | * - Free private structures | |
145 | * - Free adapter structure | |
146 | */ | |
147 | static int mwifiex_unregister(struct mwifiex_adapter *adapter) | |
148 | { | |
270e58e8 | 149 | s32 i; |
5e6e3a92 BZ |
150 | |
151 | del_timer(&adapter->cmd_timer); | |
152 | ||
153 | /* Free private structures */ | |
154 | for (i = 0; i < adapter->priv_num; i++) { | |
155 | if (adapter->priv[i]) { | |
156 | mwifiex_free_curr_bcn(adapter->priv[i]); | |
157 | kfree(adapter->priv[i]); | |
158 | } | |
159 | } | |
160 | ||
161 | kfree(adapter); | |
162 | return 0; | |
163 | } | |
164 | ||
165 | /* | |
166 | * The main process. | |
167 | * | |
168 | * This function is the main procedure of the driver and handles various driver | |
169 | * operations. It runs in a loop and provides the core functionalities. | |
170 | * | |
171 | * The main responsibilities of this function are - | |
172 | * - Ensure concurrency control | |
173 | * - Handle pending interrupts and call interrupt handlers | |
174 | * - Wake up the card if required | |
175 | * - Handle command responses and call response handlers | |
176 | * - Handle events and call event handlers | |
177 | * - Execute pending commands | |
178 | * - Transmit pending data packets | |
179 | */ | |
180 | int mwifiex_main_process(struct mwifiex_adapter *adapter) | |
181 | { | |
182 | int ret = 0; | |
183 | unsigned long flags; | |
184 | ||
185 | spin_lock_irqsave(&adapter->main_proc_lock, flags); | |
186 | ||
187 | /* Check if already processing */ | |
188 | if (adapter->mwifiex_processing) { | |
189 | spin_unlock_irqrestore(&adapter->main_proc_lock, flags); | |
190 | goto exit_main_proc; | |
191 | } else { | |
192 | adapter->mwifiex_processing = true; | |
193 | spin_unlock_irqrestore(&adapter->main_proc_lock, flags); | |
194 | } | |
195 | process_start: | |
196 | do { | |
197 | if ((adapter->hw_status == MWIFIEX_HW_STATUS_CLOSING) || | |
198 | (adapter->hw_status == MWIFIEX_HW_STATUS_NOT_READY)) | |
199 | break; | |
200 | ||
201 | /* Handle pending interrupt if any */ | |
202 | if (adapter->int_status) { | |
203 | if (adapter->hs_activated) | |
204 | mwifiex_process_hs_config(adapter); | |
205 | adapter->if_ops.process_int_status(adapter); | |
206 | } | |
207 | ||
208 | /* Need to wake up the card ? */ | |
209 | if ((adapter->ps_state == PS_STATE_SLEEP) && | |
210 | (adapter->pm_wakeup_card_req && | |
211 | !adapter->pm_wakeup_fw_try) && | |
212 | (is_command_pending(adapter) | |
213 | || !mwifiex_wmm_lists_empty(adapter))) { | |
214 | adapter->pm_wakeup_fw_try = true; | |
215 | adapter->if_ops.wakeup(adapter); | |
216 | continue; | |
217 | } | |
218 | if (IS_CARD_RX_RCVD(adapter)) { | |
219 | adapter->pm_wakeup_fw_try = false; | |
220 | if (adapter->ps_state == PS_STATE_SLEEP) | |
221 | adapter->ps_state = PS_STATE_AWAKE; | |
222 | } else { | |
223 | /* We have tried to wakeup the card already */ | |
224 | if (adapter->pm_wakeup_fw_try) | |
225 | break; | |
226 | if (adapter->ps_state != PS_STATE_AWAKE || | |
227 | adapter->tx_lock_flag) | |
228 | break; | |
229 | ||
230 | if (adapter->scan_processing || adapter->data_sent | |
231 | || mwifiex_wmm_lists_empty(adapter)) { | |
232 | if (adapter->cmd_sent || adapter->curr_cmd | |
233 | || (!is_command_pending(adapter))) | |
234 | break; | |
235 | } | |
236 | } | |
237 | ||
238 | /* Check for Cmd Resp */ | |
239 | if (adapter->cmd_resp_received) { | |
240 | adapter->cmd_resp_received = false; | |
241 | mwifiex_process_cmdresp(adapter); | |
242 | ||
243 | /* call mwifiex back when init_fw is done */ | |
244 | if (adapter->hw_status == MWIFIEX_HW_STATUS_INIT_DONE) { | |
245 | adapter->hw_status = MWIFIEX_HW_STATUS_READY; | |
246 | mwifiex_init_fw_complete(adapter); | |
247 | } | |
248 | } | |
249 | ||
250 | /* Check for event */ | |
251 | if (adapter->event_received) { | |
252 | adapter->event_received = false; | |
253 | mwifiex_process_event(adapter); | |
254 | } | |
255 | ||
256 | /* Check if we need to confirm Sleep Request | |
257 | received previously */ | |
258 | if (adapter->ps_state == PS_STATE_PRE_SLEEP) { | |
259 | if (!adapter->cmd_sent && !adapter->curr_cmd) | |
260 | mwifiex_check_ps_cond(adapter); | |
261 | } | |
262 | ||
263 | /* * The ps_state may have been changed during processing of | |
264 | * Sleep Request event. | |
265 | */ | |
266 | if ((adapter->ps_state == PS_STATE_SLEEP) | |
267 | || (adapter->ps_state == PS_STATE_PRE_SLEEP) | |
268 | || (adapter->ps_state == PS_STATE_SLEEP_CFM) | |
269 | || adapter->tx_lock_flag) | |
270 | continue; | |
271 | ||
272 | if (!adapter->cmd_sent && !adapter->curr_cmd) { | |
273 | if (mwifiex_exec_next_cmd(adapter) == -1) { | |
274 | ret = -1; | |
275 | break; | |
276 | } | |
277 | } | |
278 | ||
279 | if (!adapter->scan_processing && !adapter->data_sent && | |
280 | !mwifiex_wmm_lists_empty(adapter)) { | |
281 | mwifiex_wmm_process_tx(adapter); | |
282 | if (adapter->hs_activated) { | |
283 | adapter->is_hs_configured = false; | |
284 | mwifiex_hs_activated_event | |
285 | (mwifiex_get_priv | |
286 | (adapter, MWIFIEX_BSS_ROLE_ANY), | |
287 | false); | |
288 | } | |
289 | } | |
290 | ||
291 | if (adapter->delay_null_pkt && !adapter->cmd_sent && | |
292 | !adapter->curr_cmd && !is_command_pending(adapter) | |
293 | && mwifiex_wmm_lists_empty(adapter)) { | |
294 | if (!mwifiex_send_null_packet | |
295 | (mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA), | |
296 | MWIFIEX_TxPD_POWER_MGMT_NULL_PACKET | | |
297 | MWIFIEX_TxPD_POWER_MGMT_LAST_PACKET)) { | |
298 | adapter->delay_null_pkt = false; | |
299 | adapter->ps_state = PS_STATE_SLEEP; | |
300 | } | |
301 | break; | |
302 | } | |
303 | } while (true); | |
304 | ||
305 | if ((adapter->int_status) || IS_CARD_RX_RCVD(adapter)) | |
306 | goto process_start; | |
307 | ||
308 | spin_lock_irqsave(&adapter->main_proc_lock, flags); | |
309 | adapter->mwifiex_processing = false; | |
310 | spin_unlock_irqrestore(&adapter->main_proc_lock, flags); | |
311 | ||
312 | exit_main_proc: | |
313 | if (adapter->hw_status == MWIFIEX_HW_STATUS_CLOSING) | |
314 | mwifiex_shutdown_drv(adapter); | |
315 | return ret; | |
316 | } | |
317 | ||
318 | /* | |
319 | * This function initializes the software. | |
320 | * | |
321 | * The main work includes allocating and initializing the adapter structure | |
322 | * and initializing the private structures. | |
323 | */ | |
324 | static int | |
287546df | 325 | mwifiex_init_sw(void *card, struct mwifiex_if_ops *if_ops, void **padapter) |
5e6e3a92 BZ |
326 | { |
327 | int i; | |
5e6e3a92 BZ |
328 | struct mwifiex_drv_mode *drv_mode_ptr; |
329 | ||
330 | /* find mwifiex_drv_mode entry from mwifiex_drv_mode_tbl */ | |
331 | drv_mode_ptr = NULL; | |
332 | for (i = 0; i < ARRAY_SIZE(mwifiex_drv_mode_tbl); i++) { | |
333 | if (mwifiex_drv_mode_tbl[i].drv_mode == drv_mode) { | |
334 | drv_mode_ptr = &mwifiex_drv_mode_tbl[i]; | |
335 | break; | |
336 | } | |
337 | } | |
338 | ||
339 | if (!drv_mode_ptr) { | |
340 | pr_err("invalid drv_mode=%d\n", drv_mode); | |
341 | return -1; | |
342 | } | |
343 | ||
287546df | 344 | if (mwifiex_register(card, if_ops, drv_mode_ptr, padapter)) |
5e6e3a92 BZ |
345 | return -1; |
346 | ||
347 | return 0; | |
348 | } | |
349 | ||
350 | /* | |
351 | * This function frees the adapter structure. | |
352 | * | |
353 | * Additionally, this closes the netlink socket, frees the timers | |
354 | * and private structures. | |
355 | */ | |
356 | static void mwifiex_free_adapter(struct mwifiex_adapter *adapter) | |
357 | { | |
358 | if (!adapter) { | |
359 | pr_err("%s: adapter is NULL\n", __func__); | |
360 | return; | |
361 | } | |
362 | ||
363 | mwifiex_unregister(adapter); | |
364 | pr_debug("info: %s: free adapter\n", __func__); | |
365 | } | |
366 | ||
367 | /* | |
368 | * This function initializes the hardware and firmware. | |
369 | * | |
370 | * The main initialization steps followed are - | |
371 | * - Download the correct firmware to card | |
372 | * - Allocate and initialize the adapter structure | |
373 | * - Initialize the private structures | |
374 | * - Issue the init commands to firmware | |
375 | */ | |
376 | static int mwifiex_init_hw_fw(struct mwifiex_adapter *adapter) | |
377 | { | |
270e58e8 | 378 | int ret, err; |
5e6e3a92 BZ |
379 | struct mwifiex_fw_image fw; |
380 | ||
381 | memset(&fw, 0, sizeof(struct mwifiex_fw_image)); | |
382 | ||
4a7f5db1 AK |
383 | err = request_firmware(&adapter->firmware, adapter->fw_name, |
384 | adapter->dev); | |
5e6e3a92 BZ |
385 | if (err < 0) { |
386 | dev_err(adapter->dev, "request_firmware() returned" | |
387 | " error code %#x\n", err); | |
388 | ret = -1; | |
389 | goto done; | |
390 | } | |
391 | fw.fw_buf = (u8 *) adapter->firmware->data; | |
392 | fw.fw_len = adapter->firmware->size; | |
393 | ||
394 | ret = mwifiex_dnld_fw(adapter, &fw); | |
395 | if (ret == -1) | |
396 | goto done; | |
397 | ||
398 | dev_notice(adapter->dev, "WLAN FW is active\n"); | |
399 | ||
400 | adapter->init_wait_q_woken = false; | |
401 | ret = mwifiex_init_fw(adapter); | |
402 | if (ret == -1) { | |
403 | goto done; | |
404 | } else if (!ret) { | |
405 | adapter->hw_status = MWIFIEX_HW_STATUS_READY; | |
406 | goto done; | |
407 | } | |
408 | /* Wait for mwifiex_init to complete */ | |
409 | wait_event_interruptible(adapter->init_wait_q, | |
410 | adapter->init_wait_q_woken); | |
411 | if (adapter->hw_status != MWIFIEX_HW_STATUS_READY) { | |
412 | ret = -1; | |
413 | goto done; | |
414 | } | |
415 | ret = 0; | |
416 | ||
417 | done: | |
418 | if (adapter->firmware) | |
419 | release_firmware(adapter->firmware); | |
420 | if (ret) | |
421 | ret = -1; | |
422 | return ret; | |
423 | } | |
424 | ||
425 | /* | |
426 | * This function fills a driver buffer. | |
427 | * | |
428 | * The function associates a given SKB with the provided driver buffer | |
429 | * and also updates some of the SKB parameters, including IP header, | |
430 | * priority and timestamp. | |
431 | */ | |
432 | static void | |
433 | mwifiex_fill_buffer(struct sk_buff *skb) | |
434 | { | |
270e58e8 | 435 | struct ethhdr *eth; |
5e6e3a92 BZ |
436 | struct iphdr *iph; |
437 | struct timeval tv; | |
438 | u8 tid = 0; | |
439 | ||
440 | eth = (struct ethhdr *) skb->data; | |
441 | switch (eth->h_proto) { | |
442 | case __constant_htons(ETH_P_IP): | |
443 | iph = ip_hdr(skb); | |
444 | tid = IPTOS_PREC(iph->tos); | |
445 | pr_debug("data: packet type ETH_P_IP: %04x, tid=%#x prio=%#x\n", | |
446 | eth->h_proto, tid, skb->priority); | |
447 | break; | |
448 | case __constant_htons(ETH_P_ARP): | |
449 | pr_debug("data: ARP packet: %04x\n", eth->h_proto); | |
450 | default: | |
451 | break; | |
452 | } | |
453 | /* Offset for TOS field in the IP header */ | |
454 | #define IPTOS_OFFSET 5 | |
455 | tid = (tid >> IPTOS_OFFSET); | |
456 | skb->priority = tid; | |
457 | /* Record the current time the packet was queued; used to | |
458 | determine the amount of time the packet was queued in | |
459 | the driver before it was sent to the firmware. | |
460 | The delay is then sent along with the packet to the | |
461 | firmware for aggregate delay calculation for stats and | |
462 | MSDU lifetime expiry. | |
463 | */ | |
464 | do_gettimeofday(&tv); | |
465 | skb->tstamp = timeval_to_ktime(tv); | |
5e6e3a92 BZ |
466 | } |
467 | ||
468 | /* | |
469 | * CFG802.11 network device handler for open. | |
470 | * | |
471 | * Starts the data queue. | |
472 | */ | |
473 | static int | |
474 | mwifiex_open(struct net_device *dev) | |
475 | { | |
476 | netif_start_queue(dev); | |
477 | return 0; | |
478 | } | |
479 | ||
480 | /* | |
481 | * CFG802.11 network device handler for close. | |
482 | */ | |
483 | static int | |
484 | mwifiex_close(struct net_device *dev) | |
485 | { | |
486 | return 0; | |
487 | } | |
488 | ||
489 | /* | |
490 | * CFG802.11 network device handler for data transmission. | |
491 | */ | |
492 | static int | |
493 | mwifiex_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
494 | { | |
495 | struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev); | |
270e58e8 | 496 | struct sk_buff *new_skb; |
5e6e3a92 BZ |
497 | struct mwifiex_txinfo *tx_info; |
498 | ||
499 | dev_dbg(priv->adapter->dev, "data: %lu BSS(%d): Data <= kernel\n", | |
500 | jiffies, priv->bss_index); | |
501 | ||
502 | if (priv->adapter->surprise_removed) { | |
b53575ec | 503 | kfree_skb(skb); |
5e6e3a92 BZ |
504 | priv->stats.tx_dropped++; |
505 | return 0; | |
506 | } | |
507 | if (!skb->len || (skb->len > ETH_FRAME_LEN)) { | |
508 | dev_err(priv->adapter->dev, "Tx: bad skb len %d\n", skb->len); | |
b53575ec | 509 | kfree_skb(skb); |
5e6e3a92 BZ |
510 | priv->stats.tx_dropped++; |
511 | return 0; | |
512 | } | |
513 | if (skb_headroom(skb) < MWIFIEX_MIN_DATA_HEADER_LEN) { | |
514 | dev_dbg(priv->adapter->dev, | |
515 | "data: Tx: insufficient skb headroom %d\n", | |
516 | skb_headroom(skb)); | |
517 | /* Insufficient skb headroom - allocate a new skb */ | |
518 | new_skb = | |
519 | skb_realloc_headroom(skb, MWIFIEX_MIN_DATA_HEADER_LEN); | |
520 | if (unlikely(!new_skb)) { | |
521 | dev_err(priv->adapter->dev, "Tx: cannot alloca new_skb\n"); | |
b53575ec | 522 | kfree_skb(skb); |
5e6e3a92 BZ |
523 | priv->stats.tx_dropped++; |
524 | return 0; | |
525 | } | |
526 | kfree_skb(skb); | |
527 | skb = new_skb; | |
528 | dev_dbg(priv->adapter->dev, "info: new skb headroomd %d\n", | |
529 | skb_headroom(skb)); | |
530 | } | |
531 | ||
532 | tx_info = MWIFIEX_SKB_TXCB(skb); | |
533 | tx_info->bss_index = priv->bss_index; | |
534 | mwifiex_fill_buffer(skb); | |
535 | ||
536 | mwifiex_wmm_add_buf_txqueue(priv->adapter, skb); | |
537 | atomic_inc(&priv->adapter->tx_pending); | |
538 | ||
539 | if (atomic_read(&priv->adapter->tx_pending) >= MAX_TX_PENDING) { | |
540 | netif_stop_queue(priv->netdev); | |
541 | dev->trans_start = jiffies; | |
542 | } | |
543 | ||
544 | queue_work(priv->adapter->workqueue, &priv->adapter->main_work); | |
545 | ||
546 | return 0; | |
547 | } | |
548 | ||
549 | /* | |
550 | * CFG802.11 network device handler for setting MAC address. | |
551 | */ | |
552 | static int | |
553 | mwifiex_set_mac_address(struct net_device *dev, void *addr) | |
554 | { | |
555 | struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev); | |
556 | struct sockaddr *hw_addr = (struct sockaddr *) addr; | |
270e58e8 | 557 | int ret; |
5e6e3a92 BZ |
558 | |
559 | memcpy(priv->curr_addr, hw_addr->sa_data, ETH_ALEN); | |
560 | ||
600f5d90 AK |
561 | /* Send request to firmware */ |
562 | ret = mwifiex_send_cmd_sync(priv, HostCmd_CMD_802_11_MAC_ADDRESS, | |
563 | HostCmd_ACT_GEN_SET, 0, NULL); | |
564 | ||
565 | if (!ret) | |
566 | memcpy(priv->netdev->dev_addr, priv->curr_addr, ETH_ALEN); | |
567 | else | |
568 | dev_err(priv->adapter->dev, "set mac address failed: ret=%d" | |
569 | "\n", ret); | |
570 | ||
5e6e3a92 BZ |
571 | memcpy(dev->dev_addr, priv->curr_addr, ETH_ALEN); |
572 | ||
600f5d90 | 573 | return ret; |
5e6e3a92 BZ |
574 | } |
575 | ||
576 | /* | |
577 | * CFG802.11 network device handler for setting multicast list. | |
578 | */ | |
579 | static void mwifiex_set_multicast_list(struct net_device *dev) | |
580 | { | |
581 | struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev); | |
600f5d90 AK |
582 | struct mwifiex_multicast_list mcast_list; |
583 | ||
584 | if (dev->flags & IFF_PROMISC) { | |
585 | mcast_list.mode = MWIFIEX_PROMISC_MODE; | |
586 | } else if (dev->flags & IFF_ALLMULTI || | |
587 | netdev_mc_count(dev) > MWIFIEX_MAX_MULTICAST_LIST_SIZE) { | |
588 | mcast_list.mode = MWIFIEX_ALL_MULTI_MODE; | |
589 | } else { | |
590 | mcast_list.mode = MWIFIEX_MULTICAST_MODE; | |
591 | if (netdev_mc_count(dev)) | |
592 | mcast_list.num_multicast_addr = | |
593 | mwifiex_copy_mcast_addr(&mcast_list, dev); | |
594 | } | |
595 | mwifiex_request_set_multicast_list(priv, &mcast_list); | |
5e6e3a92 BZ |
596 | } |
597 | ||
598 | /* | |
599 | * CFG802.11 network device handler for transmission timeout. | |
600 | */ | |
601 | static void | |
602 | mwifiex_tx_timeout(struct net_device *dev) | |
603 | { | |
604 | struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev); | |
605 | ||
606 | dev_err(priv->adapter->dev, "%lu : Tx timeout, bss_index=%d\n", | |
607 | jiffies, priv->bss_index); | |
608 | dev->trans_start = jiffies; | |
609 | priv->num_tx_timeout++; | |
610 | } | |
611 | ||
612 | /* | |
613 | * CFG802.11 network device handler for statistics retrieval. | |
614 | */ | |
615 | static struct net_device_stats *mwifiex_get_stats(struct net_device *dev) | |
616 | { | |
617 | struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev); | |
618 | ||
619 | return &priv->stats; | |
620 | } | |
621 | ||
622 | /* Network device handlers */ | |
623 | static const struct net_device_ops mwifiex_netdev_ops = { | |
624 | .ndo_open = mwifiex_open, | |
625 | .ndo_stop = mwifiex_close, | |
626 | .ndo_start_xmit = mwifiex_hard_start_xmit, | |
627 | .ndo_set_mac_address = mwifiex_set_mac_address, | |
628 | .ndo_tx_timeout = mwifiex_tx_timeout, | |
629 | .ndo_get_stats = mwifiex_get_stats, | |
630 | .ndo_set_multicast_list = mwifiex_set_multicast_list, | |
631 | }; | |
632 | ||
633 | /* | |
634 | * This function initializes the private structure parameters. | |
635 | * | |
636 | * The following wait queues are initialized - | |
637 | * - IOCTL wait queue | |
638 | * - Command wait queue | |
639 | * - Statistics wait queue | |
640 | * | |
641 | * ...and the following default parameters are set - | |
642 | * - Current key index : Set to 0 | |
643 | * - Rate index : Set to auto | |
644 | * - Media connected : Set to disconnected | |
645 | * - Adhoc link sensed : Set to false | |
646 | * - Nick name : Set to null | |
647 | * - Number of Tx timeout : Set to 0 | |
648 | * - Device address : Set to current address | |
649 | * | |
650 | * In addition, the CFG80211 work queue is also created. | |
651 | */ | |
652 | static void | |
653 | mwifiex_init_priv_params(struct mwifiex_private *priv, struct net_device *dev) | |
654 | { | |
655 | dev->netdev_ops = &mwifiex_netdev_ops; | |
656 | /* Initialize private structure */ | |
5e6e3a92 BZ |
657 | priv->current_key_index = 0; |
658 | priv->media_connected = false; | |
659 | memset(&priv->nick_name, 0, sizeof(priv->nick_name)); | |
660 | priv->num_tx_timeout = 0; | |
661 | priv->workqueue = create_singlethread_workqueue("cfg80211_wq"); | |
662 | INIT_WORK(&priv->cfg_workqueue, mwifiex_cfg80211_results); | |
663 | memcpy(dev->dev_addr, priv->curr_addr, ETH_ALEN); | |
664 | } | |
665 | ||
666 | /* | |
667 | * This function adds a new logical interface. | |
668 | * | |
669 | * It allocates, initializes and registers the interface by performing | |
670 | * the following opearations - | |
671 | * - Allocate a new net device structure | |
672 | * - Assign device name | |
673 | * - Register the new device with CFG80211 subsystem | |
674 | * - Initialize semaphore and private structure | |
675 | * - Register the new device with kernel | |
676 | * - Create the complete debug FS structure if configured | |
677 | */ | |
678 | static struct mwifiex_private *mwifiex_add_interface( | |
679 | struct mwifiex_adapter *adapter, | |
680 | u8 bss_index, u8 bss_type) | |
681 | { | |
270e58e8 YAP |
682 | struct net_device *dev; |
683 | struct mwifiex_private *priv; | |
684 | void *mdev_priv; | |
5e6e3a92 BZ |
685 | |
686 | dev = alloc_netdev_mq(sizeof(struct mwifiex_private *), "mlan%d", | |
687 | ether_setup, 1); | |
688 | if (!dev) { | |
689 | dev_err(adapter->dev, "no memory available for netdevice\n"); | |
690 | goto error; | |
691 | } | |
5e6e3a92 BZ |
692 | |
693 | if (mwifiex_register_cfg80211(dev, adapter->priv[bss_index]->curr_addr, | |
694 | adapter->priv[bss_index]) != 0) { | |
695 | dev_err(adapter->dev, "cannot register netdevice with cfg80211\n"); | |
696 | goto error; | |
697 | } | |
698 | /* Save the priv pointer in netdev */ | |
699 | priv = adapter->priv[bss_index]; | |
700 | mdev_priv = netdev_priv(dev); | |
701 | *((unsigned long *) mdev_priv) = (unsigned long) priv; | |
702 | ||
703 | priv->netdev = dev; | |
704 | ||
705 | sema_init(&priv->async_sem, 1); | |
706 | priv->scan_pending_on_block = false; | |
707 | ||
708 | mwifiex_init_priv_params(priv, dev); | |
709 | ||
710 | SET_NETDEV_DEV(dev, adapter->dev); | |
711 | ||
712 | /* Register network device */ | |
713 | if (register_netdev(dev)) { | |
714 | dev_err(adapter->dev, "cannot register virtual network device\n"); | |
715 | goto error; | |
716 | } | |
717 | ||
718 | dev_dbg(adapter->dev, "info: %s: Marvell 802.11 Adapter\n", dev->name); | |
719 | #ifdef CONFIG_DEBUG_FS | |
720 | mwifiex_dev_debugfs_init(priv); | |
721 | #endif | |
722 | return priv; | |
723 | error: | |
724 | if (dev) | |
725 | free_netdev(dev); | |
726 | return NULL; | |
727 | } | |
728 | ||
729 | /* | |
730 | * This function removes a logical interface. | |
731 | * | |
732 | * It deregisters, resets and frees the interface by performing | |
733 | * the following operations - | |
734 | * - Disconnect the device if connected, send wireless event to | |
735 | * notify applications. | |
736 | * - Remove the debug FS structure if configured | |
737 | * - Unregister the device from kernel | |
738 | * - Free the net device structure | |
739 | * - Cancel all works and destroy work queue | |
740 | * - Unregister and free the wireless device from CFG80211 subsystem | |
741 | */ | |
742 | static void | |
743 | mwifiex_remove_interface(struct mwifiex_adapter *adapter, u8 bss_index) | |
744 | { | |
270e58e8 | 745 | struct net_device *dev; |
5e6e3a92 BZ |
746 | struct mwifiex_private *priv = adapter->priv[bss_index]; |
747 | ||
748 | if (!priv) | |
749 | return; | |
750 | dev = priv->netdev; | |
751 | ||
752 | if (priv->media_connected) | |
753 | priv->media_connected = false; | |
754 | ||
755 | #ifdef CONFIG_DEBUG_FS | |
756 | mwifiex_dev_debugfs_remove(priv); | |
757 | #endif | |
758 | /* Last reference is our one */ | |
759 | dev_dbg(adapter->dev, "info: %s: refcnt = %d\n", | |
760 | dev->name, netdev_refcnt_read(dev)); | |
761 | ||
762 | if (dev->reg_state == NETREG_REGISTERED) | |
763 | unregister_netdev(dev); | |
764 | ||
765 | /* Clear the priv in adapter */ | |
766 | priv->netdev = NULL; | |
767 | if (dev) | |
768 | free_netdev(dev); | |
769 | ||
770 | cancel_work_sync(&priv->cfg_workqueue); | |
771 | flush_workqueue(priv->workqueue); | |
772 | destroy_workqueue(priv->workqueue); | |
773 | wiphy_unregister(priv->wdev->wiphy); | |
774 | wiphy_free(priv->wdev->wiphy); | |
775 | kfree(priv->wdev); | |
5e6e3a92 BZ |
776 | } |
777 | ||
5e6e3a92 BZ |
778 | /* |
779 | * This function check if command is pending. | |
780 | */ | |
781 | int is_command_pending(struct mwifiex_adapter *adapter) | |
782 | { | |
783 | unsigned long flags; | |
784 | int is_cmd_pend_q_empty; | |
785 | ||
786 | spin_lock_irqsave(&adapter->cmd_pending_q_lock, flags); | |
787 | is_cmd_pend_q_empty = list_empty(&adapter->cmd_pending_q); | |
788 | spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, flags); | |
789 | ||
790 | return !is_cmd_pend_q_empty; | |
791 | } | |
792 | ||
793 | /* | |
794 | * This function returns the correct private structure pointer based | |
795 | * upon the BSS number. | |
796 | */ | |
797 | struct mwifiex_private * | |
798 | mwifiex_bss_index_to_priv(struct mwifiex_adapter *adapter, u8 bss_index) | |
799 | { | |
800 | if (!adapter || (bss_index >= adapter->priv_num)) | |
801 | return NULL; | |
802 | return adapter->priv[bss_index]; | |
803 | } | |
804 | ||
805 | /* | |
806 | * This is the main work queue function. | |
807 | * | |
808 | * It handles the main process, which in turn handles the complete | |
809 | * driver operations. | |
810 | */ | |
811 | static void mwifiex_main_work_queue(struct work_struct *work) | |
812 | { | |
813 | struct mwifiex_adapter *adapter = | |
814 | container_of(work, struct mwifiex_adapter, main_work); | |
815 | ||
816 | if (adapter->surprise_removed) | |
817 | return; | |
818 | mwifiex_main_process(adapter); | |
819 | } | |
820 | ||
821 | /* | |
822 | * This function cancels all works in the queue and destroys | |
823 | * the main workqueue. | |
824 | */ | |
825 | static void | |
826 | mwifiex_terminate_workqueue(struct mwifiex_adapter *adapter) | |
827 | { | |
828 | flush_workqueue(adapter->workqueue); | |
829 | destroy_workqueue(adapter->workqueue); | |
830 | adapter->workqueue = NULL; | |
831 | } | |
832 | ||
833 | /* | |
834 | * This function adds the card. | |
835 | * | |
836 | * This function follows the following major steps to set up the device - | |
837 | * - Initialize software. This includes probing the card, registering | |
838 | * the interface operations table, and allocating/initializing the | |
839 | * adapter structure | |
840 | * - Set up the netlink socket | |
841 | * - Create and start the main work queue | |
842 | * - Register the device | |
843 | * - Initialize firmware and hardware | |
844 | * - Add logical interfaces | |
845 | */ | |
846 | int | |
847 | mwifiex_add_card(void *card, struct semaphore *sem, | |
848 | struct mwifiex_if_ops *if_ops) | |
849 | { | |
5e6e3a92 | 850 | int i; |
2be7859f | 851 | struct mwifiex_adapter *adapter; |
5e6e3a92 BZ |
852 | |
853 | if (down_interruptible(sem)) | |
854 | goto exit_sem_err; | |
855 | ||
287546df | 856 | if (mwifiex_init_sw(card, if_ops, (void **)&adapter)) { |
5e6e3a92 BZ |
857 | pr_err("%s: software init failed\n", __func__); |
858 | goto err_init_sw; | |
859 | } | |
860 | ||
5e6e3a92 | 861 | adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING; |
5e6e3a92 BZ |
862 | adapter->surprise_removed = false; |
863 | init_waitqueue_head(&adapter->init_wait_q); | |
864 | adapter->is_suspended = false; | |
865 | adapter->hs_activated = false; | |
866 | init_waitqueue_head(&adapter->hs_activate_wait_q); | |
600f5d90 AK |
867 | adapter->cmd_wait_q_required = false; |
868 | init_waitqueue_head(&adapter->cmd_wait_q.wait); | |
869 | adapter->cmd_wait_q.condition = false; | |
870 | adapter->cmd_wait_q.status = 0; | |
5e6e3a92 | 871 | |
5e6e3a92 BZ |
872 | adapter->workqueue = create_workqueue("MWIFIEX_WORK_QUEUE"); |
873 | if (!adapter->workqueue) | |
874 | goto err_kmalloc; | |
875 | ||
876 | INIT_WORK(&adapter->main_work, mwifiex_main_work_queue); | |
877 | ||
878 | /* Register the device. Fill up the private data structure with relevant | |
879 | information from the card and request for the required IRQ. */ | |
880 | if (adapter->if_ops.register_dev(adapter)) { | |
881 | pr_err("%s: failed to register mwifiex device\n", __func__); | |
882 | goto err_registerdev; | |
883 | } | |
884 | ||
5e6e3a92 BZ |
885 | if (mwifiex_init_hw_fw(adapter)) { |
886 | pr_err("%s: firmware init failed\n", __func__); | |
887 | goto err_init_fw; | |
888 | } | |
2be7859f | 889 | |
5e6e3a92 | 890 | /* Add interfaces */ |
2be7859f | 891 | for (i = 0; i < adapter->drv_mode->intf_num; i++) { |
5e6e3a92 BZ |
892 | if (!mwifiex_add_interface(adapter, i, |
893 | adapter->drv_mode->bss_attr[i].bss_type)) { | |
636c4598 | 894 | goto err_add_intf; |
5e6e3a92 BZ |
895 | } |
896 | } | |
5e6e3a92 BZ |
897 | |
898 | up(sem); | |
899 | ||
900 | return 0; | |
901 | ||
902 | err_add_intf: | |
903 | for (i = 0; i < adapter->priv_num; i++) | |
904 | mwifiex_remove_interface(adapter, i); | |
905 | err_init_fw: | |
5e6e3a92 BZ |
906 | pr_debug("info: %s: unregister device\n", __func__); |
907 | adapter->if_ops.unregister_dev(adapter); | |
908 | err_registerdev: | |
909 | adapter->surprise_removed = true; | |
910 | mwifiex_terminate_workqueue(adapter); | |
911 | err_kmalloc: | |
912 | if ((adapter->hw_status == MWIFIEX_HW_STATUS_FW_READY) || | |
913 | (adapter->hw_status == MWIFIEX_HW_STATUS_READY)) { | |
914 | pr_debug("info: %s: shutdown mwifiex\n", __func__); | |
915 | adapter->init_wait_q_woken = false; | |
636c4598 YAP |
916 | |
917 | if (mwifiex_shutdown_drv(adapter) == -EINPROGRESS) | |
5e6e3a92 BZ |
918 | wait_event_interruptible(adapter->init_wait_q, |
919 | adapter->init_wait_q_woken); | |
920 | } | |
921 | ||
922 | mwifiex_free_adapter(adapter); | |
923 | ||
924 | err_init_sw: | |
925 | up(sem); | |
926 | ||
927 | exit_sem_err: | |
928 | return -1; | |
929 | } | |
930 | EXPORT_SYMBOL_GPL(mwifiex_add_card); | |
931 | ||
932 | /* | |
933 | * This function removes the card. | |
934 | * | |
935 | * This function follows the following major steps to remove the device - | |
936 | * - Stop data traffic | |
937 | * - Shutdown firmware | |
938 | * - Remove the logical interfaces | |
939 | * - Terminate the work queue | |
940 | * - Unregister the device | |
941 | * - Free the adapter structure | |
942 | */ | |
943 | int mwifiex_remove_card(struct mwifiex_adapter *adapter, struct semaphore *sem) | |
944 | { | |
945 | struct mwifiex_private *priv = NULL; | |
5e6e3a92 BZ |
946 | int i; |
947 | ||
948 | if (down_interruptible(sem)) | |
949 | goto exit_sem_err; | |
950 | ||
951 | if (!adapter) | |
952 | goto exit_remove; | |
953 | ||
954 | adapter->surprise_removed = true; | |
955 | ||
956 | /* Stop data */ | |
957 | for (i = 0; i < adapter->priv_num; i++) { | |
958 | priv = adapter->priv[i]; | |
959 | if (priv) { | |
960 | if (!netif_queue_stopped(priv->netdev)) | |
961 | netif_stop_queue(priv->netdev); | |
962 | if (netif_carrier_ok(priv->netdev)) | |
963 | netif_carrier_off(priv->netdev); | |
964 | } | |
965 | } | |
966 | ||
967 | dev_dbg(adapter->dev, "cmd: calling mwifiex_shutdown_drv...\n"); | |
968 | adapter->init_wait_q_woken = false; | |
636c4598 YAP |
969 | |
970 | if (mwifiex_shutdown_drv(adapter) == -EINPROGRESS) | |
5e6e3a92 BZ |
971 | wait_event_interruptible(adapter->init_wait_q, |
972 | adapter->init_wait_q_woken); | |
973 | dev_dbg(adapter->dev, "cmd: mwifiex_shutdown_drv done\n"); | |
974 | if (atomic_read(&adapter->rx_pending) || | |
975 | atomic_read(&adapter->tx_pending) || | |
600f5d90 | 976 | atomic_read(&adapter->cmd_pending)) { |
5e6e3a92 | 977 | dev_err(adapter->dev, "rx_pending=%d, tx_pending=%d, " |
600f5d90 | 978 | "cmd_pending=%d\n", |
5e6e3a92 BZ |
979 | atomic_read(&adapter->rx_pending), |
980 | atomic_read(&adapter->tx_pending), | |
600f5d90 | 981 | atomic_read(&adapter->cmd_pending)); |
5e6e3a92 BZ |
982 | } |
983 | ||
984 | /* Remove interface */ | |
985 | for (i = 0; i < adapter->priv_num; i++) | |
986 | mwifiex_remove_interface(adapter, i); | |
987 | ||
988 | mwifiex_terminate_workqueue(adapter); | |
989 | ||
990 | /* Unregister device */ | |
991 | dev_dbg(adapter->dev, "info: unregister device\n"); | |
992 | adapter->if_ops.unregister_dev(adapter); | |
993 | /* Free adapter structure */ | |
994 | dev_dbg(adapter->dev, "info: free adapter\n"); | |
995 | mwifiex_free_adapter(adapter); | |
996 | ||
997 | exit_remove: | |
998 | up(sem); | |
999 | exit_sem_err: | |
1000 | return 0; | |
1001 | } | |
1002 | EXPORT_SYMBOL_GPL(mwifiex_remove_card); | |
1003 | ||
1004 | /* | |
1005 | * This function initializes the module. | |
1006 | * | |
1007 | * The debug FS is also initialized if configured. | |
1008 | */ | |
1009 | static int | |
1010 | mwifiex_init_module(void) | |
1011 | { | |
1012 | #ifdef CONFIG_DEBUG_FS | |
1013 | mwifiex_debugfs_init(); | |
1014 | #endif | |
1015 | return 0; | |
1016 | } | |
1017 | ||
1018 | /* | |
1019 | * This function cleans up the module. | |
1020 | * | |
1021 | * The debug FS is removed if available. | |
1022 | */ | |
1023 | static void | |
1024 | mwifiex_cleanup_module(void) | |
1025 | { | |
1026 | #ifdef CONFIG_DEBUG_FS | |
1027 | mwifiex_debugfs_remove(); | |
1028 | #endif | |
1029 | } | |
1030 | ||
1031 | module_init(mwifiex_init_module); | |
1032 | module_exit(mwifiex_cleanup_module); | |
1033 | ||
1034 | MODULE_AUTHOR("Marvell International Ltd."); | |
1035 | MODULE_DESCRIPTION("Marvell WiFi-Ex Driver version " VERSION); | |
1036 | MODULE_VERSION(VERSION); | |
1037 | MODULE_LICENSE("GPL v2"); |