Commit | Line | Data |
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5e6e3a92 BZ |
1 | /* |
2 | * Marvell Wireless LAN device driver: major functions | |
3 | * | |
4 | * Copyright (C) 2011, Marvell International Ltd. | |
5 | * | |
6 | * This software file (the "File") is distributed by Marvell International | |
7 | * Ltd. under the terms of the GNU General Public License Version 2, June 1991 | |
8 | * (the "License"). You may use, redistribute and/or modify this File in | |
9 | * accordance with the terms and conditions of the License, a copy of which | |
10 | * is available by writing to the Free Software Foundation, Inc., | |
11 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the | |
12 | * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt. | |
13 | * | |
14 | * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE | |
15 | * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE | |
16 | * ARE EXPRESSLY DISCLAIMED. The License provides additional details about | |
17 | * this warranty disclaimer. | |
18 | */ | |
19 | ||
20 | #include "main.h" | |
21 | #include "wmm.h" | |
22 | #include "cfg80211.h" | |
23 | #include "11n.h" | |
24 | ||
25 | #define VERSION "1.0" | |
26 | ||
27 | const char driver_version[] = "mwifiex " VERSION " (%s) "; | |
28 | ||
5e6e3a92 BZ |
29 | /* |
30 | * This function registers the device and performs all the necessary | |
31 | * initializations. | |
32 | * | |
33 | * The following initialization operations are performed - | |
34 | * - Allocate adapter structure | |
35 | * - Save interface specific operations table in adapter | |
36 | * - Call interface specific initialization routine | |
37 | * - Allocate private structures | |
38 | * - Set default adapter structure parameters | |
39 | * - Initialize locks | |
40 | * | |
41 | * In case of any errors during inittialization, this function also ensures | |
42 | * proper cleanup before exiting. | |
43 | */ | |
44 | static int mwifiex_register(void *card, struct mwifiex_if_ops *if_ops, | |
287546df | 45 | void **padapter) |
5e6e3a92 | 46 | { |
2be7859f AK |
47 | struct mwifiex_adapter *adapter; |
48 | int i; | |
5e6e3a92 BZ |
49 | |
50 | adapter = kzalloc(sizeof(struct mwifiex_adapter), GFP_KERNEL); | |
5e6e3a92 | 51 | if (!adapter) |
b53575ec | 52 | return -ENOMEM; |
5e6e3a92 | 53 | |
287546df | 54 | *padapter = adapter; |
5e6e3a92 BZ |
55 | adapter->card = card; |
56 | ||
57 | /* Save interface specific operations in adapter */ | |
58 | memmove(&adapter->if_ops, if_ops, sizeof(struct mwifiex_if_ops)); | |
59 | ||
60 | /* card specific initialization has been deferred until now .. */ | |
636c4598 | 61 | if (adapter->if_ops.init_if(adapter)) |
5e6e3a92 BZ |
62 | goto error; |
63 | ||
64 | adapter->priv_num = 0; | |
5e6e3a92 | 65 | |
93a1df48 YAP |
66 | /* Allocate memory for private structure */ |
67 | adapter->priv[0] = kzalloc(sizeof(struct mwifiex_private), | |
68 | GFP_KERNEL); | |
69 | if (!adapter->priv[0]) { | |
70 | dev_err(adapter->dev, "%s: failed to alloc priv[0]\n", | |
71 | __func__); | |
72 | goto error; | |
5e6e3a92 BZ |
73 | } |
74 | ||
93a1df48 YAP |
75 | adapter->priv_num++; |
76 | ||
77 | adapter->priv[0]->adapter = adapter; | |
44b815c6 | 78 | mwifiex_init_lock_list(adapter); |
5e6e3a92 BZ |
79 | |
80 | init_timer(&adapter->cmd_timer); | |
81 | adapter->cmd_timer.function = mwifiex_cmd_timeout_func; | |
82 | adapter->cmd_timer.data = (unsigned long) adapter; | |
83 | ||
5e6e3a92 BZ |
84 | return 0; |
85 | ||
86 | error: | |
87 | dev_dbg(adapter->dev, "info: leave mwifiex_register with error\n"); | |
88 | ||
93a1df48 | 89 | for (i = 0; i < adapter->priv_num; i++) |
5e6e3a92 | 90 | kfree(adapter->priv[i]); |
93a1df48 | 91 | |
5e6e3a92 BZ |
92 | kfree(adapter); |
93 | ||
94 | return -1; | |
95 | } | |
96 | ||
97 | /* | |
98 | * This function unregisters the device and performs all the necessary | |
99 | * cleanups. | |
100 | * | |
101 | * The following cleanup operations are performed - | |
102 | * - Free the timers | |
103 | * - Free beacon buffers | |
104 | * - Free private structures | |
105 | * - Free adapter structure | |
106 | */ | |
107 | static int mwifiex_unregister(struct mwifiex_adapter *adapter) | |
108 | { | |
270e58e8 | 109 | s32 i; |
5e6e3a92 BZ |
110 | |
111 | del_timer(&adapter->cmd_timer); | |
112 | ||
113 | /* Free private structures */ | |
114 | for (i = 0; i < adapter->priv_num; i++) { | |
115 | if (adapter->priv[i]) { | |
116 | mwifiex_free_curr_bcn(adapter->priv[i]); | |
117 | kfree(adapter->priv[i]); | |
118 | } | |
119 | } | |
120 | ||
121 | kfree(adapter); | |
122 | return 0; | |
123 | } | |
124 | ||
125 | /* | |
126 | * The main process. | |
127 | * | |
128 | * This function is the main procedure of the driver and handles various driver | |
129 | * operations. It runs in a loop and provides the core functionalities. | |
130 | * | |
131 | * The main responsibilities of this function are - | |
132 | * - Ensure concurrency control | |
133 | * - Handle pending interrupts and call interrupt handlers | |
134 | * - Wake up the card if required | |
135 | * - Handle command responses and call response handlers | |
136 | * - Handle events and call event handlers | |
137 | * - Execute pending commands | |
138 | * - Transmit pending data packets | |
139 | */ | |
140 | int mwifiex_main_process(struct mwifiex_adapter *adapter) | |
141 | { | |
142 | int ret = 0; | |
143 | unsigned long flags; | |
144 | ||
145 | spin_lock_irqsave(&adapter->main_proc_lock, flags); | |
146 | ||
147 | /* Check if already processing */ | |
148 | if (adapter->mwifiex_processing) { | |
149 | spin_unlock_irqrestore(&adapter->main_proc_lock, flags); | |
150 | goto exit_main_proc; | |
151 | } else { | |
152 | adapter->mwifiex_processing = true; | |
153 | spin_unlock_irqrestore(&adapter->main_proc_lock, flags); | |
154 | } | |
155 | process_start: | |
156 | do { | |
157 | if ((adapter->hw_status == MWIFIEX_HW_STATUS_CLOSING) || | |
158 | (adapter->hw_status == MWIFIEX_HW_STATUS_NOT_READY)) | |
159 | break; | |
160 | ||
161 | /* Handle pending interrupt if any */ | |
162 | if (adapter->int_status) { | |
163 | if (adapter->hs_activated) | |
164 | mwifiex_process_hs_config(adapter); | |
165 | adapter->if_ops.process_int_status(adapter); | |
166 | } | |
167 | ||
168 | /* Need to wake up the card ? */ | |
169 | if ((adapter->ps_state == PS_STATE_SLEEP) && | |
170 | (adapter->pm_wakeup_card_req && | |
171 | !adapter->pm_wakeup_fw_try) && | |
172 | (is_command_pending(adapter) | |
173 | || !mwifiex_wmm_lists_empty(adapter))) { | |
174 | adapter->pm_wakeup_fw_try = true; | |
175 | adapter->if_ops.wakeup(adapter); | |
176 | continue; | |
177 | } | |
178 | if (IS_CARD_RX_RCVD(adapter)) { | |
179 | adapter->pm_wakeup_fw_try = false; | |
180 | if (adapter->ps_state == PS_STATE_SLEEP) | |
181 | adapter->ps_state = PS_STATE_AWAKE; | |
182 | } else { | |
183 | /* We have tried to wakeup the card already */ | |
184 | if (adapter->pm_wakeup_fw_try) | |
185 | break; | |
186 | if (adapter->ps_state != PS_STATE_AWAKE || | |
187 | adapter->tx_lock_flag) | |
188 | break; | |
189 | ||
190 | if (adapter->scan_processing || adapter->data_sent | |
191 | || mwifiex_wmm_lists_empty(adapter)) { | |
192 | if (adapter->cmd_sent || adapter->curr_cmd | |
193 | || (!is_command_pending(adapter))) | |
194 | break; | |
195 | } | |
196 | } | |
197 | ||
198 | /* Check for Cmd Resp */ | |
199 | if (adapter->cmd_resp_received) { | |
200 | adapter->cmd_resp_received = false; | |
201 | mwifiex_process_cmdresp(adapter); | |
202 | ||
203 | /* call mwifiex back when init_fw is done */ | |
204 | if (adapter->hw_status == MWIFIEX_HW_STATUS_INIT_DONE) { | |
205 | adapter->hw_status = MWIFIEX_HW_STATUS_READY; | |
206 | mwifiex_init_fw_complete(adapter); | |
207 | } | |
208 | } | |
209 | ||
210 | /* Check for event */ | |
211 | if (adapter->event_received) { | |
212 | adapter->event_received = false; | |
213 | mwifiex_process_event(adapter); | |
214 | } | |
215 | ||
216 | /* Check if we need to confirm Sleep Request | |
217 | received previously */ | |
218 | if (adapter->ps_state == PS_STATE_PRE_SLEEP) { | |
219 | if (!adapter->cmd_sent && !adapter->curr_cmd) | |
220 | mwifiex_check_ps_cond(adapter); | |
221 | } | |
222 | ||
223 | /* * The ps_state may have been changed during processing of | |
224 | * Sleep Request event. | |
225 | */ | |
226 | if ((adapter->ps_state == PS_STATE_SLEEP) | |
227 | || (adapter->ps_state == PS_STATE_PRE_SLEEP) | |
228 | || (adapter->ps_state == PS_STATE_SLEEP_CFM) | |
229 | || adapter->tx_lock_flag) | |
230 | continue; | |
231 | ||
232 | if (!adapter->cmd_sent && !adapter->curr_cmd) { | |
233 | if (mwifiex_exec_next_cmd(adapter) == -1) { | |
234 | ret = -1; | |
235 | break; | |
236 | } | |
237 | } | |
238 | ||
239 | if (!adapter->scan_processing && !adapter->data_sent && | |
240 | !mwifiex_wmm_lists_empty(adapter)) { | |
241 | mwifiex_wmm_process_tx(adapter); | |
242 | if (adapter->hs_activated) { | |
243 | adapter->is_hs_configured = false; | |
244 | mwifiex_hs_activated_event | |
245 | (mwifiex_get_priv | |
246 | (adapter, MWIFIEX_BSS_ROLE_ANY), | |
247 | false); | |
248 | } | |
249 | } | |
250 | ||
251 | if (adapter->delay_null_pkt && !adapter->cmd_sent && | |
252 | !adapter->curr_cmd && !is_command_pending(adapter) | |
253 | && mwifiex_wmm_lists_empty(adapter)) { | |
254 | if (!mwifiex_send_null_packet | |
255 | (mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA), | |
256 | MWIFIEX_TxPD_POWER_MGMT_NULL_PACKET | | |
257 | MWIFIEX_TxPD_POWER_MGMT_LAST_PACKET)) { | |
258 | adapter->delay_null_pkt = false; | |
259 | adapter->ps_state = PS_STATE_SLEEP; | |
260 | } | |
261 | break; | |
262 | } | |
263 | } while (true); | |
264 | ||
265 | if ((adapter->int_status) || IS_CARD_RX_RCVD(adapter)) | |
266 | goto process_start; | |
267 | ||
268 | spin_lock_irqsave(&adapter->main_proc_lock, flags); | |
269 | adapter->mwifiex_processing = false; | |
270 | spin_unlock_irqrestore(&adapter->main_proc_lock, flags); | |
271 | ||
272 | exit_main_proc: | |
273 | if (adapter->hw_status == MWIFIEX_HW_STATUS_CLOSING) | |
274 | mwifiex_shutdown_drv(adapter); | |
275 | return ret; | |
276 | } | |
277 | ||
5e6e3a92 BZ |
278 | /* |
279 | * This function frees the adapter structure. | |
280 | * | |
281 | * Additionally, this closes the netlink socket, frees the timers | |
282 | * and private structures. | |
283 | */ | |
284 | static void mwifiex_free_adapter(struct mwifiex_adapter *adapter) | |
285 | { | |
286 | if (!adapter) { | |
287 | pr_err("%s: adapter is NULL\n", __func__); | |
288 | return; | |
289 | } | |
290 | ||
291 | mwifiex_unregister(adapter); | |
292 | pr_debug("info: %s: free adapter\n", __func__); | |
293 | } | |
294 | ||
295 | /* | |
296 | * This function initializes the hardware and firmware. | |
297 | * | |
298 | * The main initialization steps followed are - | |
299 | * - Download the correct firmware to card | |
300 | * - Allocate and initialize the adapter structure | |
301 | * - Initialize the private structures | |
302 | * - Issue the init commands to firmware | |
303 | */ | |
304 | static int mwifiex_init_hw_fw(struct mwifiex_adapter *adapter) | |
305 | { | |
270e58e8 | 306 | int ret, err; |
5e6e3a92 BZ |
307 | struct mwifiex_fw_image fw; |
308 | ||
309 | memset(&fw, 0, sizeof(struct mwifiex_fw_image)); | |
310 | ||
4a7f5db1 AK |
311 | err = request_firmware(&adapter->firmware, adapter->fw_name, |
312 | adapter->dev); | |
5e6e3a92 BZ |
313 | if (err < 0) { |
314 | dev_err(adapter->dev, "request_firmware() returned" | |
315 | " error code %#x\n", err); | |
316 | ret = -1; | |
317 | goto done; | |
318 | } | |
319 | fw.fw_buf = (u8 *) adapter->firmware->data; | |
320 | fw.fw_len = adapter->firmware->size; | |
321 | ||
322 | ret = mwifiex_dnld_fw(adapter, &fw); | |
323 | if (ret == -1) | |
324 | goto done; | |
325 | ||
326 | dev_notice(adapter->dev, "WLAN FW is active\n"); | |
327 | ||
328 | adapter->init_wait_q_woken = false; | |
329 | ret = mwifiex_init_fw(adapter); | |
330 | if (ret == -1) { | |
331 | goto done; | |
332 | } else if (!ret) { | |
333 | adapter->hw_status = MWIFIEX_HW_STATUS_READY; | |
334 | goto done; | |
335 | } | |
336 | /* Wait for mwifiex_init to complete */ | |
337 | wait_event_interruptible(adapter->init_wait_q, | |
338 | adapter->init_wait_q_woken); | |
339 | if (adapter->hw_status != MWIFIEX_HW_STATUS_READY) { | |
340 | ret = -1; | |
341 | goto done; | |
342 | } | |
343 | ret = 0; | |
344 | ||
345 | done: | |
346 | if (adapter->firmware) | |
347 | release_firmware(adapter->firmware); | |
348 | if (ret) | |
349 | ret = -1; | |
350 | return ret; | |
351 | } | |
352 | ||
353 | /* | |
354 | * This function fills a driver buffer. | |
355 | * | |
356 | * The function associates a given SKB with the provided driver buffer | |
357 | * and also updates some of the SKB parameters, including IP header, | |
358 | * priority and timestamp. | |
359 | */ | |
360 | static void | |
361 | mwifiex_fill_buffer(struct sk_buff *skb) | |
362 | { | |
270e58e8 | 363 | struct ethhdr *eth; |
5e6e3a92 BZ |
364 | struct iphdr *iph; |
365 | struct timeval tv; | |
366 | u8 tid = 0; | |
367 | ||
368 | eth = (struct ethhdr *) skb->data; | |
369 | switch (eth->h_proto) { | |
370 | case __constant_htons(ETH_P_IP): | |
371 | iph = ip_hdr(skb); | |
372 | tid = IPTOS_PREC(iph->tos); | |
373 | pr_debug("data: packet type ETH_P_IP: %04x, tid=%#x prio=%#x\n", | |
374 | eth->h_proto, tid, skb->priority); | |
375 | break; | |
376 | case __constant_htons(ETH_P_ARP): | |
377 | pr_debug("data: ARP packet: %04x\n", eth->h_proto); | |
378 | default: | |
379 | break; | |
380 | } | |
381 | /* Offset for TOS field in the IP header */ | |
382 | #define IPTOS_OFFSET 5 | |
383 | tid = (tid >> IPTOS_OFFSET); | |
384 | skb->priority = tid; | |
385 | /* Record the current time the packet was queued; used to | |
386 | determine the amount of time the packet was queued in | |
387 | the driver before it was sent to the firmware. | |
388 | The delay is then sent along with the packet to the | |
389 | firmware for aggregate delay calculation for stats and | |
390 | MSDU lifetime expiry. | |
391 | */ | |
392 | do_gettimeofday(&tv); | |
393 | skb->tstamp = timeval_to_ktime(tv); | |
5e6e3a92 BZ |
394 | } |
395 | ||
396 | /* | |
397 | * CFG802.11 network device handler for open. | |
398 | * | |
399 | * Starts the data queue. | |
400 | */ | |
401 | static int | |
402 | mwifiex_open(struct net_device *dev) | |
403 | { | |
bbea3bc4 | 404 | netif_tx_start_all_queues(dev); |
5e6e3a92 BZ |
405 | return 0; |
406 | } | |
407 | ||
408 | /* | |
409 | * CFG802.11 network device handler for close. | |
410 | */ | |
411 | static int | |
412 | mwifiex_close(struct net_device *dev) | |
413 | { | |
414 | return 0; | |
415 | } | |
416 | ||
417 | /* | |
418 | * CFG802.11 network device handler for data transmission. | |
419 | */ | |
420 | static int | |
421 | mwifiex_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
422 | { | |
423 | struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev); | |
270e58e8 | 424 | struct sk_buff *new_skb; |
5e6e3a92 BZ |
425 | struct mwifiex_txinfo *tx_info; |
426 | ||
9da9a3b2 YAP |
427 | dev_dbg(priv->adapter->dev, "data: %lu BSS(%d-%d): Data <= kernel\n", |
428 | jiffies, priv->bss_type, priv->bss_num); | |
5e6e3a92 BZ |
429 | |
430 | if (priv->adapter->surprise_removed) { | |
b53575ec | 431 | kfree_skb(skb); |
5e6e3a92 BZ |
432 | priv->stats.tx_dropped++; |
433 | return 0; | |
434 | } | |
435 | if (!skb->len || (skb->len > ETH_FRAME_LEN)) { | |
436 | dev_err(priv->adapter->dev, "Tx: bad skb len %d\n", skb->len); | |
b53575ec | 437 | kfree_skb(skb); |
5e6e3a92 BZ |
438 | priv->stats.tx_dropped++; |
439 | return 0; | |
440 | } | |
441 | if (skb_headroom(skb) < MWIFIEX_MIN_DATA_HEADER_LEN) { | |
442 | dev_dbg(priv->adapter->dev, | |
443 | "data: Tx: insufficient skb headroom %d\n", | |
444 | skb_headroom(skb)); | |
445 | /* Insufficient skb headroom - allocate a new skb */ | |
446 | new_skb = | |
447 | skb_realloc_headroom(skb, MWIFIEX_MIN_DATA_HEADER_LEN); | |
448 | if (unlikely(!new_skb)) { | |
449 | dev_err(priv->adapter->dev, "Tx: cannot alloca new_skb\n"); | |
b53575ec | 450 | kfree_skb(skb); |
5e6e3a92 BZ |
451 | priv->stats.tx_dropped++; |
452 | return 0; | |
453 | } | |
454 | kfree_skb(skb); | |
455 | skb = new_skb; | |
456 | dev_dbg(priv->adapter->dev, "info: new skb headroomd %d\n", | |
457 | skb_headroom(skb)); | |
458 | } | |
459 | ||
460 | tx_info = MWIFIEX_SKB_TXCB(skb); | |
9da9a3b2 YAP |
461 | tx_info->bss_num = priv->bss_num; |
462 | tx_info->bss_type = priv->bss_type; | |
5e6e3a92 BZ |
463 | mwifiex_fill_buffer(skb); |
464 | ||
465 | mwifiex_wmm_add_buf_txqueue(priv->adapter, skb); | |
466 | atomic_inc(&priv->adapter->tx_pending); | |
467 | ||
468 | if (atomic_read(&priv->adapter->tx_pending) >= MAX_TX_PENDING) { | |
bbea3bc4 AP |
469 | mwifiex_set_trans_start(dev); |
470 | mwifiex_stop_net_dev_queue(priv->netdev, priv->adapter); | |
5e6e3a92 BZ |
471 | } |
472 | ||
473 | queue_work(priv->adapter->workqueue, &priv->adapter->main_work); | |
474 | ||
475 | return 0; | |
476 | } | |
477 | ||
478 | /* | |
479 | * CFG802.11 network device handler for setting MAC address. | |
480 | */ | |
481 | static int | |
482 | mwifiex_set_mac_address(struct net_device *dev, void *addr) | |
483 | { | |
484 | struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev); | |
a5ffddb7 | 485 | struct sockaddr *hw_addr = addr; |
270e58e8 | 486 | int ret; |
5e6e3a92 BZ |
487 | |
488 | memcpy(priv->curr_addr, hw_addr->sa_data, ETH_ALEN); | |
489 | ||
600f5d90 AK |
490 | /* Send request to firmware */ |
491 | ret = mwifiex_send_cmd_sync(priv, HostCmd_CMD_802_11_MAC_ADDRESS, | |
492 | HostCmd_ACT_GEN_SET, 0, NULL); | |
493 | ||
494 | if (!ret) | |
495 | memcpy(priv->netdev->dev_addr, priv->curr_addr, ETH_ALEN); | |
496 | else | |
497 | dev_err(priv->adapter->dev, "set mac address failed: ret=%d" | |
498 | "\n", ret); | |
499 | ||
5e6e3a92 BZ |
500 | memcpy(dev->dev_addr, priv->curr_addr, ETH_ALEN); |
501 | ||
600f5d90 | 502 | return ret; |
5e6e3a92 BZ |
503 | } |
504 | ||
505 | /* | |
506 | * CFG802.11 network device handler for setting multicast list. | |
507 | */ | |
508 | static void mwifiex_set_multicast_list(struct net_device *dev) | |
509 | { | |
510 | struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev); | |
600f5d90 AK |
511 | struct mwifiex_multicast_list mcast_list; |
512 | ||
513 | if (dev->flags & IFF_PROMISC) { | |
514 | mcast_list.mode = MWIFIEX_PROMISC_MODE; | |
515 | } else if (dev->flags & IFF_ALLMULTI || | |
516 | netdev_mc_count(dev) > MWIFIEX_MAX_MULTICAST_LIST_SIZE) { | |
517 | mcast_list.mode = MWIFIEX_ALL_MULTI_MODE; | |
518 | } else { | |
519 | mcast_list.mode = MWIFIEX_MULTICAST_MODE; | |
520 | if (netdev_mc_count(dev)) | |
521 | mcast_list.num_multicast_addr = | |
522 | mwifiex_copy_mcast_addr(&mcast_list, dev); | |
523 | } | |
524 | mwifiex_request_set_multicast_list(priv, &mcast_list); | |
5e6e3a92 BZ |
525 | } |
526 | ||
527 | /* | |
528 | * CFG802.11 network device handler for transmission timeout. | |
529 | */ | |
530 | static void | |
531 | mwifiex_tx_timeout(struct net_device *dev) | |
532 | { | |
533 | struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev); | |
534 | ||
9da9a3b2 YAP |
535 | dev_err(priv->adapter->dev, "%lu : Tx timeout, bss_type-num = %d-%d\n", |
536 | jiffies, priv->bss_type, priv->bss_num); | |
bbea3bc4 | 537 | mwifiex_set_trans_start(dev); |
5e6e3a92 BZ |
538 | priv->num_tx_timeout++; |
539 | } | |
540 | ||
541 | /* | |
542 | * CFG802.11 network device handler for statistics retrieval. | |
543 | */ | |
544 | static struct net_device_stats *mwifiex_get_stats(struct net_device *dev) | |
545 | { | |
546 | struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev); | |
547 | ||
548 | return &priv->stats; | |
549 | } | |
550 | ||
551 | /* Network device handlers */ | |
552 | static const struct net_device_ops mwifiex_netdev_ops = { | |
553 | .ndo_open = mwifiex_open, | |
554 | .ndo_stop = mwifiex_close, | |
555 | .ndo_start_xmit = mwifiex_hard_start_xmit, | |
556 | .ndo_set_mac_address = mwifiex_set_mac_address, | |
557 | .ndo_tx_timeout = mwifiex_tx_timeout, | |
558 | .ndo_get_stats = mwifiex_get_stats, | |
afc4b13d | 559 | .ndo_set_rx_mode = mwifiex_set_multicast_list, |
5e6e3a92 BZ |
560 | }; |
561 | ||
562 | /* | |
563 | * This function initializes the private structure parameters. | |
564 | * | |
565 | * The following wait queues are initialized - | |
566 | * - IOCTL wait queue | |
567 | * - Command wait queue | |
568 | * - Statistics wait queue | |
569 | * | |
570 | * ...and the following default parameters are set - | |
571 | * - Current key index : Set to 0 | |
572 | * - Rate index : Set to auto | |
573 | * - Media connected : Set to disconnected | |
574 | * - Adhoc link sensed : Set to false | |
575 | * - Nick name : Set to null | |
576 | * - Number of Tx timeout : Set to 0 | |
577 | * - Device address : Set to current address | |
578 | * | |
579 | * In addition, the CFG80211 work queue is also created. | |
580 | */ | |
93a1df48 YAP |
581 | void mwifiex_init_priv_params(struct mwifiex_private *priv, |
582 | struct net_device *dev) | |
5e6e3a92 BZ |
583 | { |
584 | dev->netdev_ops = &mwifiex_netdev_ops; | |
585 | /* Initialize private structure */ | |
5e6e3a92 BZ |
586 | priv->current_key_index = 0; |
587 | priv->media_connected = false; | |
588 | memset(&priv->nick_name, 0, sizeof(priv->nick_name)); | |
589 | priv->num_tx_timeout = 0; | |
5e6e3a92 BZ |
590 | memcpy(dev->dev_addr, priv->curr_addr, ETH_ALEN); |
591 | } | |
592 | ||
5e6e3a92 BZ |
593 | /* |
594 | * This function check if command is pending. | |
595 | */ | |
596 | int is_command_pending(struct mwifiex_adapter *adapter) | |
597 | { | |
598 | unsigned long flags; | |
599 | int is_cmd_pend_q_empty; | |
600 | ||
601 | spin_lock_irqsave(&adapter->cmd_pending_q_lock, flags); | |
602 | is_cmd_pend_q_empty = list_empty(&adapter->cmd_pending_q); | |
603 | spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, flags); | |
604 | ||
605 | return !is_cmd_pend_q_empty; | |
606 | } | |
607 | ||
5e6e3a92 BZ |
608 | /* |
609 | * This is the main work queue function. | |
610 | * | |
611 | * It handles the main process, which in turn handles the complete | |
612 | * driver operations. | |
613 | */ | |
614 | static void mwifiex_main_work_queue(struct work_struct *work) | |
615 | { | |
616 | struct mwifiex_adapter *adapter = | |
617 | container_of(work, struct mwifiex_adapter, main_work); | |
618 | ||
619 | if (adapter->surprise_removed) | |
620 | return; | |
621 | mwifiex_main_process(adapter); | |
622 | } | |
623 | ||
624 | /* | |
625 | * This function cancels all works in the queue and destroys | |
626 | * the main workqueue. | |
627 | */ | |
628 | static void | |
629 | mwifiex_terminate_workqueue(struct mwifiex_adapter *adapter) | |
630 | { | |
631 | flush_workqueue(adapter->workqueue); | |
632 | destroy_workqueue(adapter->workqueue); | |
633 | adapter->workqueue = NULL; | |
634 | } | |
635 | ||
636 | /* | |
637 | * This function adds the card. | |
638 | * | |
639 | * This function follows the following major steps to set up the device - | |
640 | * - Initialize software. This includes probing the card, registering | |
641 | * the interface operations table, and allocating/initializing the | |
642 | * adapter structure | |
643 | * - Set up the netlink socket | |
644 | * - Create and start the main work queue | |
645 | * - Register the device | |
646 | * - Initialize firmware and hardware | |
647 | * - Add logical interfaces | |
648 | */ | |
649 | int | |
650 | mwifiex_add_card(void *card, struct semaphore *sem, | |
d930faee | 651 | struct mwifiex_if_ops *if_ops, u8 iface_type) |
5e6e3a92 | 652 | { |
2be7859f | 653 | struct mwifiex_adapter *adapter; |
5674fbb7 | 654 | char fmt[64]; |
93a1df48 | 655 | struct mwifiex_private *priv; |
5e6e3a92 BZ |
656 | |
657 | if (down_interruptible(sem)) | |
658 | goto exit_sem_err; | |
659 | ||
93a1df48 | 660 | if (mwifiex_register(card, if_ops, (void **)&adapter)) { |
5e6e3a92 BZ |
661 | pr_err("%s: software init failed\n", __func__); |
662 | goto err_init_sw; | |
663 | } | |
664 | ||
d930faee AK |
665 | adapter->iface_type = iface_type; |
666 | ||
5e6e3a92 | 667 | adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING; |
5e6e3a92 BZ |
668 | adapter->surprise_removed = false; |
669 | init_waitqueue_head(&adapter->init_wait_q); | |
670 | adapter->is_suspended = false; | |
671 | adapter->hs_activated = false; | |
672 | init_waitqueue_head(&adapter->hs_activate_wait_q); | |
600f5d90 AK |
673 | adapter->cmd_wait_q_required = false; |
674 | init_waitqueue_head(&adapter->cmd_wait_q.wait); | |
600f5d90 | 675 | adapter->cmd_wait_q.status = 0; |
efaaa8b8 | 676 | adapter->scan_wait_q_woken = false; |
5e6e3a92 | 677 | |
5e6e3a92 BZ |
678 | adapter->workqueue = create_workqueue("MWIFIEX_WORK_QUEUE"); |
679 | if (!adapter->workqueue) | |
680 | goto err_kmalloc; | |
681 | ||
682 | INIT_WORK(&adapter->main_work, mwifiex_main_work_queue); | |
683 | ||
684 | /* Register the device. Fill up the private data structure with relevant | |
685 | information from the card and request for the required IRQ. */ | |
686 | if (adapter->if_ops.register_dev(adapter)) { | |
687 | pr_err("%s: failed to register mwifiex device\n", __func__); | |
688 | goto err_registerdev; | |
689 | } | |
690 | ||
5e6e3a92 BZ |
691 | if (mwifiex_init_hw_fw(adapter)) { |
692 | pr_err("%s: firmware init failed\n", __func__); | |
693 | goto err_init_fw; | |
694 | } | |
2be7859f | 695 | |
93a1df48 YAP |
696 | priv = adapter->priv[0]; |
697 | ||
698 | if (mwifiex_register_cfg80211(priv) != 0) { | |
699 | dev_err(adapter->dev, "cannot register netdevice" | |
700 | " with cfg80211\n"); | |
701 | goto err_init_fw; | |
702 | } | |
703 | ||
704 | rtnl_lock(); | |
705 | /* Create station interface by default */ | |
706 | if (!mwifiex_add_virtual_intf(priv->wdev->wiphy, "mlan%d", | |
707 | NL80211_IFTYPE_STATION, NULL, NULL)) { | |
708 | rtnl_unlock(); | |
709 | dev_err(adapter->dev, "cannot create default station" | |
710 | " interface\n"); | |
711 | goto err_add_intf; | |
5e6e3a92 | 712 | } |
5e6e3a92 | 713 | |
93a1df48 YAP |
714 | rtnl_unlock(); |
715 | ||
5e6e3a92 BZ |
716 | up(sem); |
717 | ||
5674fbb7 AK |
718 | mwifiex_drv_get_driver_version(adapter, fmt, sizeof(fmt) - 1); |
719 | dev_notice(adapter->dev, "driver_version = %s\n", fmt); | |
720 | ||
5e6e3a92 BZ |
721 | return 0; |
722 | ||
723 | err_add_intf: | |
93a1df48 YAP |
724 | rtnl_lock(); |
725 | mwifiex_del_virtual_intf(priv->wdev->wiphy, priv->netdev); | |
726 | rtnl_unlock(); | |
5e6e3a92 | 727 | err_init_fw: |
5e6e3a92 BZ |
728 | pr_debug("info: %s: unregister device\n", __func__); |
729 | adapter->if_ops.unregister_dev(adapter); | |
730 | err_registerdev: | |
731 | adapter->surprise_removed = true; | |
732 | mwifiex_terminate_workqueue(adapter); | |
733 | err_kmalloc: | |
734 | if ((adapter->hw_status == MWIFIEX_HW_STATUS_FW_READY) || | |
735 | (adapter->hw_status == MWIFIEX_HW_STATUS_READY)) { | |
736 | pr_debug("info: %s: shutdown mwifiex\n", __func__); | |
737 | adapter->init_wait_q_woken = false; | |
636c4598 YAP |
738 | |
739 | if (mwifiex_shutdown_drv(adapter) == -EINPROGRESS) | |
5e6e3a92 BZ |
740 | wait_event_interruptible(adapter->init_wait_q, |
741 | adapter->init_wait_q_woken); | |
742 | } | |
743 | ||
744 | mwifiex_free_adapter(adapter); | |
745 | ||
746 | err_init_sw: | |
747 | up(sem); | |
748 | ||
749 | exit_sem_err: | |
750 | return -1; | |
751 | } | |
752 | EXPORT_SYMBOL_GPL(mwifiex_add_card); | |
753 | ||
754 | /* | |
755 | * This function removes the card. | |
756 | * | |
757 | * This function follows the following major steps to remove the device - | |
758 | * - Stop data traffic | |
759 | * - Shutdown firmware | |
760 | * - Remove the logical interfaces | |
761 | * - Terminate the work queue | |
762 | * - Unregister the device | |
763 | * - Free the adapter structure | |
764 | */ | |
765 | int mwifiex_remove_card(struct mwifiex_adapter *adapter, struct semaphore *sem) | |
766 | { | |
767 | struct mwifiex_private *priv = NULL; | |
5e6e3a92 BZ |
768 | int i; |
769 | ||
770 | if (down_interruptible(sem)) | |
771 | goto exit_sem_err; | |
772 | ||
773 | if (!adapter) | |
774 | goto exit_remove; | |
775 | ||
776 | adapter->surprise_removed = true; | |
777 | ||
778 | /* Stop data */ | |
779 | for (i = 0; i < adapter->priv_num; i++) { | |
780 | priv = adapter->priv[i]; | |
93a1df48 | 781 | if (priv && priv->netdev) { |
5e6e3a92 | 782 | if (!netif_queue_stopped(priv->netdev)) |
bbea3bc4 AP |
783 | mwifiex_stop_net_dev_queue(priv->netdev, |
784 | adapter); | |
5e6e3a92 BZ |
785 | if (netif_carrier_ok(priv->netdev)) |
786 | netif_carrier_off(priv->netdev); | |
787 | } | |
788 | } | |
789 | ||
790 | dev_dbg(adapter->dev, "cmd: calling mwifiex_shutdown_drv...\n"); | |
791 | adapter->init_wait_q_woken = false; | |
636c4598 YAP |
792 | |
793 | if (mwifiex_shutdown_drv(adapter) == -EINPROGRESS) | |
5e6e3a92 BZ |
794 | wait_event_interruptible(adapter->init_wait_q, |
795 | adapter->init_wait_q_woken); | |
796 | dev_dbg(adapter->dev, "cmd: mwifiex_shutdown_drv done\n"); | |
797 | if (atomic_read(&adapter->rx_pending) || | |
798 | atomic_read(&adapter->tx_pending) || | |
600f5d90 | 799 | atomic_read(&adapter->cmd_pending)) { |
5e6e3a92 | 800 | dev_err(adapter->dev, "rx_pending=%d, tx_pending=%d, " |
600f5d90 | 801 | "cmd_pending=%d\n", |
5e6e3a92 BZ |
802 | atomic_read(&adapter->rx_pending), |
803 | atomic_read(&adapter->tx_pending), | |
600f5d90 | 804 | atomic_read(&adapter->cmd_pending)); |
5e6e3a92 BZ |
805 | } |
806 | ||
93a1df48 YAP |
807 | for (i = 0; i < adapter->priv_num; i++) { |
808 | priv = adapter->priv[i]; | |
809 | ||
810 | if (!priv) | |
811 | continue; | |
812 | ||
813 | rtnl_lock(); | |
814 | mwifiex_del_virtual_intf(priv->wdev->wiphy, priv->netdev); | |
815 | rtnl_unlock(); | |
816 | } | |
817 | ||
3d82de0f YAP |
818 | priv = adapter->priv[0]; |
819 | if (!priv) | |
820 | goto exit_remove; | |
821 | ||
93a1df48 YAP |
822 | wiphy_unregister(priv->wdev->wiphy); |
823 | wiphy_free(priv->wdev->wiphy); | |
824 | kfree(priv->wdev); | |
5e6e3a92 BZ |
825 | |
826 | mwifiex_terminate_workqueue(adapter); | |
827 | ||
828 | /* Unregister device */ | |
829 | dev_dbg(adapter->dev, "info: unregister device\n"); | |
830 | adapter->if_ops.unregister_dev(adapter); | |
831 | /* Free adapter structure */ | |
832 | dev_dbg(adapter->dev, "info: free adapter\n"); | |
833 | mwifiex_free_adapter(adapter); | |
834 | ||
835 | exit_remove: | |
836 | up(sem); | |
837 | exit_sem_err: | |
838 | return 0; | |
839 | } | |
840 | EXPORT_SYMBOL_GPL(mwifiex_remove_card); | |
841 | ||
842 | /* | |
843 | * This function initializes the module. | |
844 | * | |
845 | * The debug FS is also initialized if configured. | |
846 | */ | |
847 | static int | |
848 | mwifiex_init_module(void) | |
849 | { | |
850 | #ifdef CONFIG_DEBUG_FS | |
851 | mwifiex_debugfs_init(); | |
852 | #endif | |
853 | return 0; | |
854 | } | |
855 | ||
856 | /* | |
857 | * This function cleans up the module. | |
858 | * | |
859 | * The debug FS is removed if available. | |
860 | */ | |
861 | static void | |
862 | mwifiex_cleanup_module(void) | |
863 | { | |
864 | #ifdef CONFIG_DEBUG_FS | |
865 | mwifiex_debugfs_remove(); | |
866 | #endif | |
867 | } | |
868 | ||
869 | module_init(mwifiex_init_module); | |
870 | module_exit(mwifiex_cleanup_module); | |
871 | ||
872 | MODULE_AUTHOR("Marvell International Ltd."); | |
873 | MODULE_DESCRIPTION("Marvell WiFi-Ex Driver version " VERSION); | |
874 | MODULE_VERSION(VERSION); | |
875 | MODULE_LICENSE("GPL v2"); |