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 | ||
5e6e3a92 BZ |
38 | /* Supported drv_mode table */ |
39 | static struct mwifiex_drv_mode mwifiex_drv_mode_tbl[] = { | |
40 | { | |
2be7859f AK |
41 | .drv_mode = DRV_MODE_STA, |
42 | .intf_num = ARRAY_SIZE(mwifiex_bss_sta), | |
43 | .bss_attr = mwifiex_bss_sta, | |
44 | }, | |
5e6e3a92 BZ |
45 | }; |
46 | ||
47 | /* | |
48 | * This function registers the device and performs all the necessary | |
49 | * initializations. | |
50 | * | |
51 | * The following initialization operations are performed - | |
52 | * - Allocate adapter structure | |
53 | * - Save interface specific operations table in adapter | |
54 | * - Call interface specific initialization routine | |
55 | * - Allocate private structures | |
56 | * - Set default adapter structure parameters | |
57 | * - Initialize locks | |
58 | * | |
59 | * In case of any errors during inittialization, this function also ensures | |
60 | * proper cleanup before exiting. | |
61 | */ | |
62 | static int mwifiex_register(void *card, struct mwifiex_if_ops *if_ops, | |
2be7859f | 63 | struct mwifiex_drv_mode *drv_mode_ptr) |
5e6e3a92 | 64 | { |
2be7859f AK |
65 | struct mwifiex_adapter *adapter; |
66 | int i; | |
5e6e3a92 BZ |
67 | |
68 | adapter = kzalloc(sizeof(struct mwifiex_adapter), GFP_KERNEL); | |
5e6e3a92 | 69 | if (!adapter) |
b53575ec | 70 | return -ENOMEM; |
5e6e3a92 BZ |
71 | |
72 | g_adapter = adapter; | |
73 | adapter->card = card; | |
74 | ||
75 | /* Save interface specific operations in adapter */ | |
76 | memmove(&adapter->if_ops, if_ops, sizeof(struct mwifiex_if_ops)); | |
77 | ||
78 | /* card specific initialization has been deferred until now .. */ | |
636c4598 | 79 | if (adapter->if_ops.init_if(adapter)) |
5e6e3a92 BZ |
80 | goto error; |
81 | ||
82 | adapter->priv_num = 0; | |
2be7859f | 83 | for (i = 0; i < drv_mode_ptr->intf_num; i++) { |
5e6e3a92 BZ |
84 | adapter->priv[i] = NULL; |
85 | ||
2be7859f | 86 | if (!drv_mode_ptr->bss_attr[i].active) |
5e6e3a92 BZ |
87 | continue; |
88 | ||
2be7859f | 89 | /* Allocate memory for private structure */ |
5e6e3a92 BZ |
90 | adapter->priv[i] = kzalloc(sizeof(struct mwifiex_private), |
91 | GFP_KERNEL); | |
92 | if (!adapter->priv[i]) { | |
93 | dev_err(adapter->dev, "%s: failed to alloc priv[%d]\n", | |
94 | __func__, i); | |
95 | goto error; | |
96 | } | |
97 | ||
98 | adapter->priv_num++; | |
5e6e3a92 BZ |
99 | adapter->priv[i]->adapter = adapter; |
100 | /* Save bss_type, frame_type & bss_priority */ | |
2be7859f | 101 | adapter->priv[i]->bss_type = drv_mode_ptr->bss_attr[i].bss_type; |
5e6e3a92 | 102 | adapter->priv[i]->frame_type = |
2be7859f | 103 | drv_mode_ptr->bss_attr[i].frame_type; |
5e6e3a92 | 104 | adapter->priv[i]->bss_priority = |
2be7859f AK |
105 | drv_mode_ptr->bss_attr[i].bss_priority; |
106 | ||
107 | if (drv_mode_ptr->bss_attr[i].bss_type == MWIFIEX_BSS_TYPE_STA) | |
5e6e3a92 | 108 | adapter->priv[i]->bss_role = MWIFIEX_BSS_ROLE_STA; |
2be7859f AK |
109 | else if (drv_mode_ptr->bss_attr[i].bss_type == |
110 | MWIFIEX_BSS_TYPE_UAP) | |
5e6e3a92 BZ |
111 | adapter->priv[i]->bss_role = MWIFIEX_BSS_ROLE_UAP; |
112 | ||
113 | /* Save bss_index & bss_num */ | |
114 | adapter->priv[i]->bss_index = i; | |
2be7859f | 115 | adapter->priv[i]->bss_num = drv_mode_ptr->bss_attr[i].bss_num; |
5e6e3a92 | 116 | } |
2be7859f | 117 | adapter->drv_mode = drv_mode_ptr; |
5e6e3a92 | 118 | |
5e6e3a92 BZ |
119 | if (mwifiex_init_lock_list(adapter)) |
120 | goto error; | |
121 | ||
122 | init_timer(&adapter->cmd_timer); | |
123 | adapter->cmd_timer.function = mwifiex_cmd_timeout_func; | |
124 | adapter->cmd_timer.data = (unsigned long) adapter; | |
125 | ||
5e6e3a92 BZ |
126 | return 0; |
127 | ||
128 | error: | |
129 | dev_dbg(adapter->dev, "info: leave mwifiex_register with error\n"); | |
130 | ||
5e6e3a92 | 131 | mwifiex_free_lock_list(adapter); |
2be7859f | 132 | for (i = 0; i < drv_mode_ptr->intf_num; i++) |
5e6e3a92 BZ |
133 | kfree(adapter->priv[i]); |
134 | kfree(adapter); | |
135 | ||
136 | return -1; | |
137 | } | |
138 | ||
139 | /* | |
140 | * This function unregisters the device and performs all the necessary | |
141 | * cleanups. | |
142 | * | |
143 | * The following cleanup operations are performed - | |
144 | * - Free the timers | |
145 | * - Free beacon buffers | |
146 | * - Free private structures | |
147 | * - Free adapter structure | |
148 | */ | |
149 | static int mwifiex_unregister(struct mwifiex_adapter *adapter) | |
150 | { | |
270e58e8 | 151 | s32 i; |
5e6e3a92 BZ |
152 | |
153 | del_timer(&adapter->cmd_timer); | |
154 | ||
155 | /* Free private structures */ | |
156 | for (i = 0; i < adapter->priv_num; i++) { | |
157 | if (adapter->priv[i]) { | |
158 | mwifiex_free_curr_bcn(adapter->priv[i]); | |
159 | kfree(adapter->priv[i]); | |
160 | } | |
161 | } | |
162 | ||
163 | kfree(adapter); | |
164 | return 0; | |
165 | } | |
166 | ||
167 | /* | |
168 | * The main process. | |
169 | * | |
170 | * This function is the main procedure of the driver and handles various driver | |
171 | * operations. It runs in a loop and provides the core functionalities. | |
172 | * | |
173 | * The main responsibilities of this function are - | |
174 | * - Ensure concurrency control | |
175 | * - Handle pending interrupts and call interrupt handlers | |
176 | * - Wake up the card if required | |
177 | * - Handle command responses and call response handlers | |
178 | * - Handle events and call event handlers | |
179 | * - Execute pending commands | |
180 | * - Transmit pending data packets | |
181 | */ | |
182 | int mwifiex_main_process(struct mwifiex_adapter *adapter) | |
183 | { | |
184 | int ret = 0; | |
185 | unsigned long flags; | |
186 | ||
187 | spin_lock_irqsave(&adapter->main_proc_lock, flags); | |
188 | ||
189 | /* Check if already processing */ | |
190 | if (adapter->mwifiex_processing) { | |
191 | spin_unlock_irqrestore(&adapter->main_proc_lock, flags); | |
192 | goto exit_main_proc; | |
193 | } else { | |
194 | adapter->mwifiex_processing = true; | |
195 | spin_unlock_irqrestore(&adapter->main_proc_lock, flags); | |
196 | } | |
197 | process_start: | |
198 | do { | |
199 | if ((adapter->hw_status == MWIFIEX_HW_STATUS_CLOSING) || | |
200 | (adapter->hw_status == MWIFIEX_HW_STATUS_NOT_READY)) | |
201 | break; | |
202 | ||
203 | /* Handle pending interrupt if any */ | |
204 | if (adapter->int_status) { | |
205 | if (adapter->hs_activated) | |
206 | mwifiex_process_hs_config(adapter); | |
207 | adapter->if_ops.process_int_status(adapter); | |
208 | } | |
209 | ||
210 | /* Need to wake up the card ? */ | |
211 | if ((adapter->ps_state == PS_STATE_SLEEP) && | |
212 | (adapter->pm_wakeup_card_req && | |
213 | !adapter->pm_wakeup_fw_try) && | |
214 | (is_command_pending(adapter) | |
215 | || !mwifiex_wmm_lists_empty(adapter))) { | |
216 | adapter->pm_wakeup_fw_try = true; | |
217 | adapter->if_ops.wakeup(adapter); | |
218 | continue; | |
219 | } | |
220 | if (IS_CARD_RX_RCVD(adapter)) { | |
221 | adapter->pm_wakeup_fw_try = false; | |
222 | if (adapter->ps_state == PS_STATE_SLEEP) | |
223 | adapter->ps_state = PS_STATE_AWAKE; | |
224 | } else { | |
225 | /* We have tried to wakeup the card already */ | |
226 | if (adapter->pm_wakeup_fw_try) | |
227 | break; | |
228 | if (adapter->ps_state != PS_STATE_AWAKE || | |
229 | adapter->tx_lock_flag) | |
230 | break; | |
231 | ||
232 | if (adapter->scan_processing || adapter->data_sent | |
233 | || mwifiex_wmm_lists_empty(adapter)) { | |
234 | if (adapter->cmd_sent || adapter->curr_cmd | |
235 | || (!is_command_pending(adapter))) | |
236 | break; | |
237 | } | |
238 | } | |
239 | ||
240 | /* Check for Cmd Resp */ | |
241 | if (adapter->cmd_resp_received) { | |
242 | adapter->cmd_resp_received = false; | |
243 | mwifiex_process_cmdresp(adapter); | |
244 | ||
245 | /* call mwifiex back when init_fw is done */ | |
246 | if (adapter->hw_status == MWIFIEX_HW_STATUS_INIT_DONE) { | |
247 | adapter->hw_status = MWIFIEX_HW_STATUS_READY; | |
248 | mwifiex_init_fw_complete(adapter); | |
249 | } | |
250 | } | |
251 | ||
252 | /* Check for event */ | |
253 | if (adapter->event_received) { | |
254 | adapter->event_received = false; | |
255 | mwifiex_process_event(adapter); | |
256 | } | |
257 | ||
258 | /* Check if we need to confirm Sleep Request | |
259 | received previously */ | |
260 | if (adapter->ps_state == PS_STATE_PRE_SLEEP) { | |
261 | if (!adapter->cmd_sent && !adapter->curr_cmd) | |
262 | mwifiex_check_ps_cond(adapter); | |
263 | } | |
264 | ||
265 | /* * The ps_state may have been changed during processing of | |
266 | * Sleep Request event. | |
267 | */ | |
268 | if ((adapter->ps_state == PS_STATE_SLEEP) | |
269 | || (adapter->ps_state == PS_STATE_PRE_SLEEP) | |
270 | || (adapter->ps_state == PS_STATE_SLEEP_CFM) | |
271 | || adapter->tx_lock_flag) | |
272 | continue; | |
273 | ||
274 | if (!adapter->cmd_sent && !adapter->curr_cmd) { | |
275 | if (mwifiex_exec_next_cmd(adapter) == -1) { | |
276 | ret = -1; | |
277 | break; | |
278 | } | |
279 | } | |
280 | ||
281 | if (!adapter->scan_processing && !adapter->data_sent && | |
282 | !mwifiex_wmm_lists_empty(adapter)) { | |
283 | mwifiex_wmm_process_tx(adapter); | |
284 | if (adapter->hs_activated) { | |
285 | adapter->is_hs_configured = false; | |
286 | mwifiex_hs_activated_event | |
287 | (mwifiex_get_priv | |
288 | (adapter, MWIFIEX_BSS_ROLE_ANY), | |
289 | false); | |
290 | } | |
291 | } | |
292 | ||
293 | if (adapter->delay_null_pkt && !adapter->cmd_sent && | |
294 | !adapter->curr_cmd && !is_command_pending(adapter) | |
295 | && mwifiex_wmm_lists_empty(adapter)) { | |
296 | if (!mwifiex_send_null_packet | |
297 | (mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA), | |
298 | MWIFIEX_TxPD_POWER_MGMT_NULL_PACKET | | |
299 | MWIFIEX_TxPD_POWER_MGMT_LAST_PACKET)) { | |
300 | adapter->delay_null_pkt = false; | |
301 | adapter->ps_state = PS_STATE_SLEEP; | |
302 | } | |
303 | break; | |
304 | } | |
305 | } while (true); | |
306 | ||
307 | if ((adapter->int_status) || IS_CARD_RX_RCVD(adapter)) | |
308 | goto process_start; | |
309 | ||
310 | spin_lock_irqsave(&adapter->main_proc_lock, flags); | |
311 | adapter->mwifiex_processing = false; | |
312 | spin_unlock_irqrestore(&adapter->main_proc_lock, flags); | |
313 | ||
314 | exit_main_proc: | |
315 | if (adapter->hw_status == MWIFIEX_HW_STATUS_CLOSING) | |
316 | mwifiex_shutdown_drv(adapter); | |
317 | return ret; | |
318 | } | |
319 | ||
320 | /* | |
321 | * This function initializes the software. | |
322 | * | |
323 | * The main work includes allocating and initializing the adapter structure | |
324 | * and initializing the private structures. | |
325 | */ | |
326 | static int | |
2be7859f | 327 | mwifiex_init_sw(void *card, struct mwifiex_if_ops *if_ops) |
5e6e3a92 BZ |
328 | { |
329 | int i; | |
5e6e3a92 BZ |
330 | struct mwifiex_drv_mode *drv_mode_ptr; |
331 | ||
332 | /* find mwifiex_drv_mode entry from mwifiex_drv_mode_tbl */ | |
333 | drv_mode_ptr = NULL; | |
334 | for (i = 0; i < ARRAY_SIZE(mwifiex_drv_mode_tbl); i++) { | |
335 | if (mwifiex_drv_mode_tbl[i].drv_mode == drv_mode) { | |
336 | drv_mode_ptr = &mwifiex_drv_mode_tbl[i]; | |
337 | break; | |
338 | } | |
339 | } | |
340 | ||
341 | if (!drv_mode_ptr) { | |
342 | pr_err("invalid drv_mode=%d\n", drv_mode); | |
343 | return -1; | |
344 | } | |
345 | ||
2be7859f | 346 | if (mwifiex_register(card, if_ops, drv_mode_ptr)) |
5e6e3a92 BZ |
347 | return -1; |
348 | ||
349 | return 0; | |
350 | } | |
351 | ||
352 | /* | |
353 | * This function frees the adapter structure. | |
354 | * | |
355 | * Additionally, this closes the netlink socket, frees the timers | |
356 | * and private structures. | |
357 | */ | |
358 | static void mwifiex_free_adapter(struct mwifiex_adapter *adapter) | |
359 | { | |
360 | if (!adapter) { | |
361 | pr_err("%s: adapter is NULL\n", __func__); | |
362 | return; | |
363 | } | |
364 | ||
365 | mwifiex_unregister(adapter); | |
366 | pr_debug("info: %s: free adapter\n", __func__); | |
367 | } | |
368 | ||
369 | /* | |
370 | * This function initializes the hardware and firmware. | |
371 | * | |
372 | * The main initialization steps followed are - | |
373 | * - Download the correct firmware to card | |
374 | * - Allocate and initialize the adapter structure | |
375 | * - Initialize the private structures | |
376 | * - Issue the init commands to firmware | |
377 | */ | |
378 | static int mwifiex_init_hw_fw(struct mwifiex_adapter *adapter) | |
379 | { | |
270e58e8 | 380 | int ret, err; |
5e6e3a92 BZ |
381 | struct mwifiex_fw_image fw; |
382 | ||
383 | memset(&fw, 0, sizeof(struct mwifiex_fw_image)); | |
384 | ||
4a7f5db1 AK |
385 | err = request_firmware(&adapter->firmware, adapter->fw_name, |
386 | adapter->dev); | |
5e6e3a92 BZ |
387 | if (err < 0) { |
388 | dev_err(adapter->dev, "request_firmware() returned" | |
389 | " error code %#x\n", err); | |
390 | ret = -1; | |
391 | goto done; | |
392 | } | |
393 | fw.fw_buf = (u8 *) adapter->firmware->data; | |
394 | fw.fw_len = adapter->firmware->size; | |
395 | ||
396 | ret = mwifiex_dnld_fw(adapter, &fw); | |
397 | if (ret == -1) | |
398 | goto done; | |
399 | ||
400 | dev_notice(adapter->dev, "WLAN FW is active\n"); | |
401 | ||
402 | adapter->init_wait_q_woken = false; | |
403 | ret = mwifiex_init_fw(adapter); | |
404 | if (ret == -1) { | |
405 | goto done; | |
406 | } else if (!ret) { | |
407 | adapter->hw_status = MWIFIEX_HW_STATUS_READY; | |
408 | goto done; | |
409 | } | |
410 | /* Wait for mwifiex_init to complete */ | |
411 | wait_event_interruptible(adapter->init_wait_q, | |
412 | adapter->init_wait_q_woken); | |
413 | if (adapter->hw_status != MWIFIEX_HW_STATUS_READY) { | |
414 | ret = -1; | |
415 | goto done; | |
416 | } | |
417 | ret = 0; | |
418 | ||
419 | done: | |
420 | if (adapter->firmware) | |
421 | release_firmware(adapter->firmware); | |
422 | if (ret) | |
423 | ret = -1; | |
424 | return ret; | |
425 | } | |
426 | ||
427 | /* | |
428 | * This function fills a driver buffer. | |
429 | * | |
430 | * The function associates a given SKB with the provided driver buffer | |
431 | * and also updates some of the SKB parameters, including IP header, | |
432 | * priority and timestamp. | |
433 | */ | |
434 | static void | |
435 | mwifiex_fill_buffer(struct sk_buff *skb) | |
436 | { | |
270e58e8 | 437 | struct ethhdr *eth; |
5e6e3a92 BZ |
438 | struct iphdr *iph; |
439 | struct timeval tv; | |
440 | u8 tid = 0; | |
441 | ||
442 | eth = (struct ethhdr *) skb->data; | |
443 | switch (eth->h_proto) { | |
444 | case __constant_htons(ETH_P_IP): | |
445 | iph = ip_hdr(skb); | |
446 | tid = IPTOS_PREC(iph->tos); | |
447 | pr_debug("data: packet type ETH_P_IP: %04x, tid=%#x prio=%#x\n", | |
448 | eth->h_proto, tid, skb->priority); | |
449 | break; | |
450 | case __constant_htons(ETH_P_ARP): | |
451 | pr_debug("data: ARP packet: %04x\n", eth->h_proto); | |
452 | default: | |
453 | break; | |
454 | } | |
455 | /* Offset for TOS field in the IP header */ | |
456 | #define IPTOS_OFFSET 5 | |
457 | tid = (tid >> IPTOS_OFFSET); | |
458 | skb->priority = tid; | |
459 | /* Record the current time the packet was queued; used to | |
460 | determine the amount of time the packet was queued in | |
461 | the driver before it was sent to the firmware. | |
462 | The delay is then sent along with the packet to the | |
463 | firmware for aggregate delay calculation for stats and | |
464 | MSDU lifetime expiry. | |
465 | */ | |
466 | do_gettimeofday(&tv); | |
467 | skb->tstamp = timeval_to_ktime(tv); | |
5e6e3a92 BZ |
468 | } |
469 | ||
470 | /* | |
471 | * CFG802.11 network device handler for open. | |
472 | * | |
473 | * Starts the data queue. | |
474 | */ | |
475 | static int | |
476 | mwifiex_open(struct net_device *dev) | |
477 | { | |
478 | netif_start_queue(dev); | |
479 | return 0; | |
480 | } | |
481 | ||
482 | /* | |
483 | * CFG802.11 network device handler for close. | |
484 | */ | |
485 | static int | |
486 | mwifiex_close(struct net_device *dev) | |
487 | { | |
488 | return 0; | |
489 | } | |
490 | ||
491 | /* | |
492 | * CFG802.11 network device handler for data transmission. | |
493 | */ | |
494 | static int | |
495 | mwifiex_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
496 | { | |
497 | struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev); | |
270e58e8 | 498 | struct sk_buff *new_skb; |
5e6e3a92 BZ |
499 | struct mwifiex_txinfo *tx_info; |
500 | ||
501 | dev_dbg(priv->adapter->dev, "data: %lu BSS(%d): Data <= kernel\n", | |
502 | jiffies, priv->bss_index); | |
503 | ||
504 | if (priv->adapter->surprise_removed) { | |
b53575ec | 505 | kfree_skb(skb); |
5e6e3a92 BZ |
506 | priv->stats.tx_dropped++; |
507 | return 0; | |
508 | } | |
509 | if (!skb->len || (skb->len > ETH_FRAME_LEN)) { | |
510 | dev_err(priv->adapter->dev, "Tx: bad skb len %d\n", skb->len); | |
b53575ec | 511 | kfree_skb(skb); |
5e6e3a92 BZ |
512 | priv->stats.tx_dropped++; |
513 | return 0; | |
514 | } | |
515 | if (skb_headroom(skb) < MWIFIEX_MIN_DATA_HEADER_LEN) { | |
516 | dev_dbg(priv->adapter->dev, | |
517 | "data: Tx: insufficient skb headroom %d\n", | |
518 | skb_headroom(skb)); | |
519 | /* Insufficient skb headroom - allocate a new skb */ | |
520 | new_skb = | |
521 | skb_realloc_headroom(skb, MWIFIEX_MIN_DATA_HEADER_LEN); | |
522 | if (unlikely(!new_skb)) { | |
523 | dev_err(priv->adapter->dev, "Tx: cannot alloca new_skb\n"); | |
b53575ec | 524 | kfree_skb(skb); |
5e6e3a92 BZ |
525 | priv->stats.tx_dropped++; |
526 | return 0; | |
527 | } | |
528 | kfree_skb(skb); | |
529 | skb = new_skb; | |
530 | dev_dbg(priv->adapter->dev, "info: new skb headroomd %d\n", | |
531 | skb_headroom(skb)); | |
532 | } | |
533 | ||
534 | tx_info = MWIFIEX_SKB_TXCB(skb); | |
535 | tx_info->bss_index = priv->bss_index; | |
536 | mwifiex_fill_buffer(skb); | |
537 | ||
538 | mwifiex_wmm_add_buf_txqueue(priv->adapter, skb); | |
539 | atomic_inc(&priv->adapter->tx_pending); | |
540 | ||
541 | if (atomic_read(&priv->adapter->tx_pending) >= MAX_TX_PENDING) { | |
542 | netif_stop_queue(priv->netdev); | |
543 | dev->trans_start = jiffies; | |
544 | } | |
545 | ||
546 | queue_work(priv->adapter->workqueue, &priv->adapter->main_work); | |
547 | ||
548 | return 0; | |
549 | } | |
550 | ||
551 | /* | |
552 | * CFG802.11 network device handler for setting MAC address. | |
553 | */ | |
554 | static int | |
555 | mwifiex_set_mac_address(struct net_device *dev, void *addr) | |
556 | { | |
557 | struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev); | |
558 | struct sockaddr *hw_addr = (struct sockaddr *) addr; | |
270e58e8 | 559 | int ret; |
5e6e3a92 BZ |
560 | |
561 | memcpy(priv->curr_addr, hw_addr->sa_data, ETH_ALEN); | |
562 | ||
600f5d90 AK |
563 | /* Send request to firmware */ |
564 | ret = mwifiex_send_cmd_sync(priv, HostCmd_CMD_802_11_MAC_ADDRESS, | |
565 | HostCmd_ACT_GEN_SET, 0, NULL); | |
566 | ||
567 | if (!ret) | |
568 | memcpy(priv->netdev->dev_addr, priv->curr_addr, ETH_ALEN); | |
569 | else | |
570 | dev_err(priv->adapter->dev, "set mac address failed: ret=%d" | |
571 | "\n", ret); | |
572 | ||
5e6e3a92 BZ |
573 | memcpy(dev->dev_addr, priv->curr_addr, ETH_ALEN); |
574 | ||
600f5d90 | 575 | return ret; |
5e6e3a92 BZ |
576 | } |
577 | ||
578 | /* | |
579 | * CFG802.11 network device handler for setting multicast list. | |
580 | */ | |
581 | static void mwifiex_set_multicast_list(struct net_device *dev) | |
582 | { | |
583 | struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev); | |
600f5d90 AK |
584 | struct mwifiex_multicast_list mcast_list; |
585 | ||
586 | if (dev->flags & IFF_PROMISC) { | |
587 | mcast_list.mode = MWIFIEX_PROMISC_MODE; | |
588 | } else if (dev->flags & IFF_ALLMULTI || | |
589 | netdev_mc_count(dev) > MWIFIEX_MAX_MULTICAST_LIST_SIZE) { | |
590 | mcast_list.mode = MWIFIEX_ALL_MULTI_MODE; | |
591 | } else { | |
592 | mcast_list.mode = MWIFIEX_MULTICAST_MODE; | |
593 | if (netdev_mc_count(dev)) | |
594 | mcast_list.num_multicast_addr = | |
595 | mwifiex_copy_mcast_addr(&mcast_list, dev); | |
596 | } | |
597 | mwifiex_request_set_multicast_list(priv, &mcast_list); | |
5e6e3a92 BZ |
598 | } |
599 | ||
600 | /* | |
601 | * CFG802.11 network device handler for transmission timeout. | |
602 | */ | |
603 | static void | |
604 | mwifiex_tx_timeout(struct net_device *dev) | |
605 | { | |
606 | struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev); | |
607 | ||
608 | dev_err(priv->adapter->dev, "%lu : Tx timeout, bss_index=%d\n", | |
609 | jiffies, priv->bss_index); | |
610 | dev->trans_start = jiffies; | |
611 | priv->num_tx_timeout++; | |
612 | } | |
613 | ||
614 | /* | |
615 | * CFG802.11 network device handler for statistics retrieval. | |
616 | */ | |
617 | static struct net_device_stats *mwifiex_get_stats(struct net_device *dev) | |
618 | { | |
619 | struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev); | |
620 | ||
621 | return &priv->stats; | |
622 | } | |
623 | ||
624 | /* Network device handlers */ | |
625 | static const struct net_device_ops mwifiex_netdev_ops = { | |
626 | .ndo_open = mwifiex_open, | |
627 | .ndo_stop = mwifiex_close, | |
628 | .ndo_start_xmit = mwifiex_hard_start_xmit, | |
629 | .ndo_set_mac_address = mwifiex_set_mac_address, | |
630 | .ndo_tx_timeout = mwifiex_tx_timeout, | |
631 | .ndo_get_stats = mwifiex_get_stats, | |
632 | .ndo_set_multicast_list = mwifiex_set_multicast_list, | |
633 | }; | |
634 | ||
635 | /* | |
636 | * This function initializes the private structure parameters. | |
637 | * | |
638 | * The following wait queues are initialized - | |
639 | * - IOCTL wait queue | |
640 | * - Command wait queue | |
641 | * - Statistics wait queue | |
642 | * | |
643 | * ...and the following default parameters are set - | |
644 | * - Current key index : Set to 0 | |
645 | * - Rate index : Set to auto | |
646 | * - Media connected : Set to disconnected | |
647 | * - Adhoc link sensed : Set to false | |
648 | * - Nick name : Set to null | |
649 | * - Number of Tx timeout : Set to 0 | |
650 | * - Device address : Set to current address | |
651 | * | |
652 | * In addition, the CFG80211 work queue is also created. | |
653 | */ | |
654 | static void | |
655 | mwifiex_init_priv_params(struct mwifiex_private *priv, struct net_device *dev) | |
656 | { | |
657 | dev->netdev_ops = &mwifiex_netdev_ops; | |
658 | /* Initialize private structure */ | |
5e6e3a92 BZ |
659 | priv->current_key_index = 0; |
660 | priv->media_connected = false; | |
661 | memset(&priv->nick_name, 0, sizeof(priv->nick_name)); | |
662 | priv->num_tx_timeout = 0; | |
663 | priv->workqueue = create_singlethread_workqueue("cfg80211_wq"); | |
664 | INIT_WORK(&priv->cfg_workqueue, mwifiex_cfg80211_results); | |
665 | memcpy(dev->dev_addr, priv->curr_addr, ETH_ALEN); | |
666 | } | |
667 | ||
668 | /* | |
669 | * This function adds a new logical interface. | |
670 | * | |
671 | * It allocates, initializes and registers the interface by performing | |
672 | * the following opearations - | |
673 | * - Allocate a new net device structure | |
674 | * - Assign device name | |
675 | * - Register the new device with CFG80211 subsystem | |
676 | * - Initialize semaphore and private structure | |
677 | * - Register the new device with kernel | |
678 | * - Create the complete debug FS structure if configured | |
679 | */ | |
680 | static struct mwifiex_private *mwifiex_add_interface( | |
681 | struct mwifiex_adapter *adapter, | |
682 | u8 bss_index, u8 bss_type) | |
683 | { | |
270e58e8 YAP |
684 | struct net_device *dev; |
685 | struct mwifiex_private *priv; | |
686 | void *mdev_priv; | |
5e6e3a92 BZ |
687 | |
688 | dev = alloc_netdev_mq(sizeof(struct mwifiex_private *), "mlan%d", | |
689 | ether_setup, 1); | |
690 | if (!dev) { | |
691 | dev_err(adapter->dev, "no memory available for netdevice\n"); | |
692 | goto error; | |
693 | } | |
5e6e3a92 BZ |
694 | |
695 | if (mwifiex_register_cfg80211(dev, adapter->priv[bss_index]->curr_addr, | |
696 | adapter->priv[bss_index]) != 0) { | |
697 | dev_err(adapter->dev, "cannot register netdevice with cfg80211\n"); | |
698 | goto error; | |
699 | } | |
700 | /* Save the priv pointer in netdev */ | |
701 | priv = adapter->priv[bss_index]; | |
702 | mdev_priv = netdev_priv(dev); | |
703 | *((unsigned long *) mdev_priv) = (unsigned long) priv; | |
704 | ||
705 | priv->netdev = dev; | |
706 | ||
707 | sema_init(&priv->async_sem, 1); | |
708 | priv->scan_pending_on_block = false; | |
709 | ||
710 | mwifiex_init_priv_params(priv, dev); | |
711 | ||
712 | SET_NETDEV_DEV(dev, adapter->dev); | |
713 | ||
714 | /* Register network device */ | |
715 | if (register_netdev(dev)) { | |
716 | dev_err(adapter->dev, "cannot register virtual network device\n"); | |
717 | goto error; | |
718 | } | |
719 | ||
720 | dev_dbg(adapter->dev, "info: %s: Marvell 802.11 Adapter\n", dev->name); | |
721 | #ifdef CONFIG_DEBUG_FS | |
722 | mwifiex_dev_debugfs_init(priv); | |
723 | #endif | |
724 | return priv; | |
725 | error: | |
726 | if (dev) | |
727 | free_netdev(dev); | |
728 | return NULL; | |
729 | } | |
730 | ||
731 | /* | |
732 | * This function removes a logical interface. | |
733 | * | |
734 | * It deregisters, resets and frees the interface by performing | |
735 | * the following operations - | |
736 | * - Disconnect the device if connected, send wireless event to | |
737 | * notify applications. | |
738 | * - Remove the debug FS structure if configured | |
739 | * - Unregister the device from kernel | |
740 | * - Free the net device structure | |
741 | * - Cancel all works and destroy work queue | |
742 | * - Unregister and free the wireless device from CFG80211 subsystem | |
743 | */ | |
744 | static void | |
745 | mwifiex_remove_interface(struct mwifiex_adapter *adapter, u8 bss_index) | |
746 | { | |
270e58e8 | 747 | struct net_device *dev; |
5e6e3a92 BZ |
748 | struct mwifiex_private *priv = adapter->priv[bss_index]; |
749 | ||
750 | if (!priv) | |
751 | return; | |
752 | dev = priv->netdev; | |
753 | ||
754 | if (priv->media_connected) | |
755 | priv->media_connected = false; | |
756 | ||
757 | #ifdef CONFIG_DEBUG_FS | |
758 | mwifiex_dev_debugfs_remove(priv); | |
759 | #endif | |
760 | /* Last reference is our one */ | |
761 | dev_dbg(adapter->dev, "info: %s: refcnt = %d\n", | |
762 | dev->name, netdev_refcnt_read(dev)); | |
763 | ||
764 | if (dev->reg_state == NETREG_REGISTERED) | |
765 | unregister_netdev(dev); | |
766 | ||
767 | /* Clear the priv in adapter */ | |
768 | priv->netdev = NULL; | |
769 | if (dev) | |
770 | free_netdev(dev); | |
771 | ||
772 | cancel_work_sync(&priv->cfg_workqueue); | |
773 | flush_workqueue(priv->workqueue); | |
774 | destroy_workqueue(priv->workqueue); | |
775 | wiphy_unregister(priv->wdev->wiphy); | |
776 | wiphy_free(priv->wdev->wiphy); | |
777 | kfree(priv->wdev); | |
5e6e3a92 BZ |
778 | } |
779 | ||
5e6e3a92 BZ |
780 | /* |
781 | * This function check if command is pending. | |
782 | */ | |
783 | int is_command_pending(struct mwifiex_adapter *adapter) | |
784 | { | |
785 | unsigned long flags; | |
786 | int is_cmd_pend_q_empty; | |
787 | ||
788 | spin_lock_irqsave(&adapter->cmd_pending_q_lock, flags); | |
789 | is_cmd_pend_q_empty = list_empty(&adapter->cmd_pending_q); | |
790 | spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, flags); | |
791 | ||
792 | return !is_cmd_pend_q_empty; | |
793 | } | |
794 | ||
795 | /* | |
796 | * This function returns the correct private structure pointer based | |
797 | * upon the BSS number. | |
798 | */ | |
799 | struct mwifiex_private * | |
800 | mwifiex_bss_index_to_priv(struct mwifiex_adapter *adapter, u8 bss_index) | |
801 | { | |
802 | if (!adapter || (bss_index >= adapter->priv_num)) | |
803 | return NULL; | |
804 | return adapter->priv[bss_index]; | |
805 | } | |
806 | ||
807 | /* | |
808 | * This is the main work queue function. | |
809 | * | |
810 | * It handles the main process, which in turn handles the complete | |
811 | * driver operations. | |
812 | */ | |
813 | static void mwifiex_main_work_queue(struct work_struct *work) | |
814 | { | |
815 | struct mwifiex_adapter *adapter = | |
816 | container_of(work, struct mwifiex_adapter, main_work); | |
817 | ||
818 | if (adapter->surprise_removed) | |
819 | return; | |
820 | mwifiex_main_process(adapter); | |
821 | } | |
822 | ||
823 | /* | |
824 | * This function cancels all works in the queue and destroys | |
825 | * the main workqueue. | |
826 | */ | |
827 | static void | |
828 | mwifiex_terminate_workqueue(struct mwifiex_adapter *adapter) | |
829 | { | |
830 | flush_workqueue(adapter->workqueue); | |
831 | destroy_workqueue(adapter->workqueue); | |
832 | adapter->workqueue = NULL; | |
833 | } | |
834 | ||
835 | /* | |
836 | * This function adds the card. | |
837 | * | |
838 | * This function follows the following major steps to set up the device - | |
839 | * - Initialize software. This includes probing the card, registering | |
840 | * the interface operations table, and allocating/initializing the | |
841 | * adapter structure | |
842 | * - Set up the netlink socket | |
843 | * - Create and start the main work queue | |
844 | * - Register the device | |
845 | * - Initialize firmware and hardware | |
846 | * - Add logical interfaces | |
847 | */ | |
848 | int | |
849 | mwifiex_add_card(void *card, struct semaphore *sem, | |
850 | struct mwifiex_if_ops *if_ops) | |
851 | { | |
5e6e3a92 | 852 | int i; |
2be7859f | 853 | struct mwifiex_adapter *adapter; |
5e6e3a92 BZ |
854 | |
855 | if (down_interruptible(sem)) | |
856 | goto exit_sem_err; | |
857 | ||
2be7859f | 858 | if (mwifiex_init_sw(card, if_ops)) { |
5e6e3a92 BZ |
859 | pr_err("%s: software init failed\n", __func__); |
860 | goto err_init_sw; | |
861 | } | |
862 | ||
2be7859f | 863 | adapter = g_adapter; |
5e6e3a92 BZ |
864 | |
865 | adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING; | |
5e6e3a92 BZ |
866 | adapter->surprise_removed = false; |
867 | init_waitqueue_head(&adapter->init_wait_q); | |
868 | adapter->is_suspended = false; | |
869 | adapter->hs_activated = false; | |
870 | init_waitqueue_head(&adapter->hs_activate_wait_q); | |
600f5d90 AK |
871 | adapter->cmd_wait_q_required = false; |
872 | init_waitqueue_head(&adapter->cmd_wait_q.wait); | |
873 | adapter->cmd_wait_q.condition = false; | |
874 | adapter->cmd_wait_q.status = 0; | |
5e6e3a92 | 875 | |
5e6e3a92 BZ |
876 | adapter->workqueue = create_workqueue("MWIFIEX_WORK_QUEUE"); |
877 | if (!adapter->workqueue) | |
878 | goto err_kmalloc; | |
879 | ||
880 | INIT_WORK(&adapter->main_work, mwifiex_main_work_queue); | |
881 | ||
882 | /* Register the device. Fill up the private data structure with relevant | |
883 | information from the card and request for the required IRQ. */ | |
884 | if (adapter->if_ops.register_dev(adapter)) { | |
885 | pr_err("%s: failed to register mwifiex device\n", __func__); | |
886 | goto err_registerdev; | |
887 | } | |
888 | ||
5e6e3a92 BZ |
889 | if (mwifiex_init_hw_fw(adapter)) { |
890 | pr_err("%s: firmware init failed\n", __func__); | |
891 | goto err_init_fw; | |
892 | } | |
2be7859f | 893 | |
5e6e3a92 | 894 | /* Add interfaces */ |
2be7859f | 895 | for (i = 0; i < adapter->drv_mode->intf_num; i++) { |
5e6e3a92 BZ |
896 | if (!mwifiex_add_interface(adapter, i, |
897 | adapter->drv_mode->bss_attr[i].bss_type)) { | |
636c4598 | 898 | goto err_add_intf; |
5e6e3a92 BZ |
899 | } |
900 | } | |
5e6e3a92 BZ |
901 | |
902 | up(sem); | |
903 | ||
904 | return 0; | |
905 | ||
906 | err_add_intf: | |
907 | for (i = 0; i < adapter->priv_num; i++) | |
908 | mwifiex_remove_interface(adapter, i); | |
909 | err_init_fw: | |
5e6e3a92 BZ |
910 | pr_debug("info: %s: unregister device\n", __func__); |
911 | adapter->if_ops.unregister_dev(adapter); | |
912 | err_registerdev: | |
913 | adapter->surprise_removed = true; | |
914 | mwifiex_terminate_workqueue(adapter); | |
915 | err_kmalloc: | |
916 | if ((adapter->hw_status == MWIFIEX_HW_STATUS_FW_READY) || | |
917 | (adapter->hw_status == MWIFIEX_HW_STATUS_READY)) { | |
918 | pr_debug("info: %s: shutdown mwifiex\n", __func__); | |
919 | adapter->init_wait_q_woken = false; | |
636c4598 YAP |
920 | |
921 | if (mwifiex_shutdown_drv(adapter) == -EINPROGRESS) | |
5e6e3a92 BZ |
922 | wait_event_interruptible(adapter->init_wait_q, |
923 | adapter->init_wait_q_woken); | |
924 | } | |
925 | ||
926 | mwifiex_free_adapter(adapter); | |
927 | ||
928 | err_init_sw: | |
929 | up(sem); | |
930 | ||
931 | exit_sem_err: | |
932 | return -1; | |
933 | } | |
934 | EXPORT_SYMBOL_GPL(mwifiex_add_card); | |
935 | ||
936 | /* | |
937 | * This function removes the card. | |
938 | * | |
939 | * This function follows the following major steps to remove the device - | |
940 | * - Stop data traffic | |
941 | * - Shutdown firmware | |
942 | * - Remove the logical interfaces | |
943 | * - Terminate the work queue | |
944 | * - Unregister the device | |
945 | * - Free the adapter structure | |
946 | */ | |
947 | int mwifiex_remove_card(struct mwifiex_adapter *adapter, struct semaphore *sem) | |
948 | { | |
949 | struct mwifiex_private *priv = NULL; | |
5e6e3a92 BZ |
950 | int i; |
951 | ||
952 | if (down_interruptible(sem)) | |
953 | goto exit_sem_err; | |
954 | ||
955 | if (!adapter) | |
956 | goto exit_remove; | |
957 | ||
958 | adapter->surprise_removed = true; | |
959 | ||
960 | /* Stop data */ | |
961 | for (i = 0; i < adapter->priv_num; i++) { | |
962 | priv = adapter->priv[i]; | |
963 | if (priv) { | |
964 | if (!netif_queue_stopped(priv->netdev)) | |
965 | netif_stop_queue(priv->netdev); | |
966 | if (netif_carrier_ok(priv->netdev)) | |
967 | netif_carrier_off(priv->netdev); | |
968 | } | |
969 | } | |
970 | ||
971 | dev_dbg(adapter->dev, "cmd: calling mwifiex_shutdown_drv...\n"); | |
972 | adapter->init_wait_q_woken = false; | |
636c4598 YAP |
973 | |
974 | if (mwifiex_shutdown_drv(adapter) == -EINPROGRESS) | |
5e6e3a92 BZ |
975 | wait_event_interruptible(adapter->init_wait_q, |
976 | adapter->init_wait_q_woken); | |
977 | dev_dbg(adapter->dev, "cmd: mwifiex_shutdown_drv done\n"); | |
978 | if (atomic_read(&adapter->rx_pending) || | |
979 | atomic_read(&adapter->tx_pending) || | |
600f5d90 | 980 | atomic_read(&adapter->cmd_pending)) { |
5e6e3a92 | 981 | dev_err(adapter->dev, "rx_pending=%d, tx_pending=%d, " |
600f5d90 | 982 | "cmd_pending=%d\n", |
5e6e3a92 BZ |
983 | atomic_read(&adapter->rx_pending), |
984 | atomic_read(&adapter->tx_pending), | |
600f5d90 | 985 | atomic_read(&adapter->cmd_pending)); |
5e6e3a92 BZ |
986 | } |
987 | ||
988 | /* Remove interface */ | |
989 | for (i = 0; i < adapter->priv_num; i++) | |
990 | mwifiex_remove_interface(adapter, i); | |
991 | ||
992 | mwifiex_terminate_workqueue(adapter); | |
993 | ||
994 | /* Unregister device */ | |
995 | dev_dbg(adapter->dev, "info: unregister device\n"); | |
996 | adapter->if_ops.unregister_dev(adapter); | |
997 | /* Free adapter structure */ | |
998 | dev_dbg(adapter->dev, "info: free adapter\n"); | |
999 | mwifiex_free_adapter(adapter); | |
1000 | ||
1001 | exit_remove: | |
1002 | up(sem); | |
1003 | exit_sem_err: | |
1004 | return 0; | |
1005 | } | |
1006 | EXPORT_SYMBOL_GPL(mwifiex_remove_card); | |
1007 | ||
1008 | /* | |
1009 | * This function initializes the module. | |
1010 | * | |
1011 | * The debug FS is also initialized if configured. | |
1012 | */ | |
1013 | static int | |
1014 | mwifiex_init_module(void) | |
1015 | { | |
1016 | #ifdef CONFIG_DEBUG_FS | |
1017 | mwifiex_debugfs_init(); | |
1018 | #endif | |
1019 | return 0; | |
1020 | } | |
1021 | ||
1022 | /* | |
1023 | * This function cleans up the module. | |
1024 | * | |
1025 | * The debug FS is removed if available. | |
1026 | */ | |
1027 | static void | |
1028 | mwifiex_cleanup_module(void) | |
1029 | { | |
1030 | #ifdef CONFIG_DEBUG_FS | |
1031 | mwifiex_debugfs_remove(); | |
1032 | #endif | |
1033 | } | |
1034 | ||
1035 | module_init(mwifiex_init_module); | |
1036 | module_exit(mwifiex_cleanup_module); | |
1037 | ||
1038 | MODULE_AUTHOR("Marvell International Ltd."); | |
1039 | MODULE_DESCRIPTION("Marvell WiFi-Ex Driver version " VERSION); | |
1040 | MODULE_VERSION(VERSION); | |
1041 | MODULE_LICENSE("GPL v2"); |