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[deliverable/linux.git] / drivers / net / wireless / ath / ath6kl / main.c
1 /*
2 * Copyright (c) 2004-2011 Atheros Communications Inc.
3 *
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
16
17 #include "core.h"
18 #include "hif-ops.h"
19 #include "cfg80211.h"
20 #include "target.h"
21 #include "debug.h"
22
23 struct ath6kl_sta *ath6kl_find_sta(struct ath6kl *ar, u8 *node_addr)
24 {
25 struct ath6kl_sta *conn = NULL;
26 u8 i, max_conn;
27
28 max_conn = (ar->nw_type == AP_NETWORK) ? AP_MAX_NUM_STA : 0;
29
30 for (i = 0; i < max_conn; i++) {
31 if (memcmp(node_addr, ar->sta_list[i].mac, ETH_ALEN) == 0) {
32 conn = &ar->sta_list[i];
33 break;
34 }
35 }
36
37 return conn;
38 }
39
40 struct ath6kl_sta *ath6kl_find_sta_by_aid(struct ath6kl *ar, u8 aid)
41 {
42 struct ath6kl_sta *conn = NULL;
43 u8 ctr;
44
45 for (ctr = 0; ctr < AP_MAX_NUM_STA; ctr++) {
46 if (ar->sta_list[ctr].aid == aid) {
47 conn = &ar->sta_list[ctr];
48 break;
49 }
50 }
51 return conn;
52 }
53
54 static void ath6kl_add_new_sta(struct ath6kl *ar, u8 *mac, u16 aid, u8 *wpaie,
55 u8 ielen, u8 keymgmt, u8 ucipher, u8 auth)
56 {
57 struct ath6kl_sta *sta;
58 u8 free_slot;
59
60 free_slot = aid - 1;
61
62 sta = &ar->sta_list[free_slot];
63 memcpy(sta->mac, mac, ETH_ALEN);
64 memcpy(sta->wpa_ie, wpaie, ielen);
65 sta->aid = aid;
66 sta->keymgmt = keymgmt;
67 sta->ucipher = ucipher;
68 sta->auth = auth;
69
70 ar->sta_list_index = ar->sta_list_index | (1 << free_slot);
71 ar->ap_stats.sta[free_slot].aid = cpu_to_le32(aid);
72 }
73
74 static void ath6kl_sta_cleanup(struct ath6kl *ar, u8 i)
75 {
76 struct ath6kl_sta *sta = &ar->sta_list[i];
77
78 /* empty the queued pkts in the PS queue if any */
79 spin_lock_bh(&sta->psq_lock);
80 skb_queue_purge(&sta->psq);
81 spin_unlock_bh(&sta->psq_lock);
82
83 memset(&ar->ap_stats.sta[sta->aid - 1], 0,
84 sizeof(struct wmi_per_sta_stat));
85 memset(sta->mac, 0, ETH_ALEN);
86 memset(sta->wpa_ie, 0, ATH6KL_MAX_IE);
87 sta->aid = 0;
88 sta->sta_flags = 0;
89
90 ar->sta_list_index = ar->sta_list_index & ~(1 << i);
91
92 }
93
94 static u8 ath6kl_remove_sta(struct ath6kl *ar, u8 *mac, u16 reason)
95 {
96 u8 i, removed = 0;
97
98 if (is_zero_ether_addr(mac))
99 return removed;
100
101 if (is_broadcast_ether_addr(mac)) {
102 ath6kl_dbg(ATH6KL_DBG_TRC, "deleting all station\n");
103
104 for (i = 0; i < AP_MAX_NUM_STA; i++) {
105 if (!is_zero_ether_addr(ar->sta_list[i].mac)) {
106 ath6kl_sta_cleanup(ar, i);
107 removed = 1;
108 }
109 }
110 } else {
111 for (i = 0; i < AP_MAX_NUM_STA; i++) {
112 if (memcmp(ar->sta_list[i].mac, mac, ETH_ALEN) == 0) {
113 ath6kl_dbg(ATH6KL_DBG_TRC,
114 "deleting station %pM aid=%d reason=%d\n",
115 mac, ar->sta_list[i].aid, reason);
116 ath6kl_sta_cleanup(ar, i);
117 removed = 1;
118 break;
119 }
120 }
121 }
122
123 return removed;
124 }
125
126 enum htc_endpoint_id ath6kl_ac2_endpoint_id(void *devt, u8 ac)
127 {
128 struct ath6kl *ar = devt;
129 return ar->ac2ep_map[ac];
130 }
131
132 struct ath6kl_cookie *ath6kl_alloc_cookie(struct ath6kl *ar)
133 {
134 struct ath6kl_cookie *cookie;
135
136 cookie = ar->cookie_list;
137 if (cookie != NULL) {
138 ar->cookie_list = cookie->arc_list_next;
139 ar->cookie_count--;
140 }
141
142 return cookie;
143 }
144
145 void ath6kl_cookie_init(struct ath6kl *ar)
146 {
147 u32 i;
148
149 ar->cookie_list = NULL;
150 ar->cookie_count = 0;
151
152 memset(ar->cookie_mem, 0, sizeof(ar->cookie_mem));
153
154 for (i = 0; i < MAX_COOKIE_NUM; i++)
155 ath6kl_free_cookie(ar, &ar->cookie_mem[i]);
156 }
157
158 void ath6kl_cookie_cleanup(struct ath6kl *ar)
159 {
160 ar->cookie_list = NULL;
161 ar->cookie_count = 0;
162 }
163
164 void ath6kl_free_cookie(struct ath6kl *ar, struct ath6kl_cookie *cookie)
165 {
166 /* Insert first */
167
168 if (!ar || !cookie)
169 return;
170
171 cookie->arc_list_next = ar->cookie_list;
172 ar->cookie_list = cookie;
173 ar->cookie_count++;
174 }
175
176 /* set the window address register (using 4-byte register access ). */
177 static int ath6kl_set_addrwin_reg(struct ath6kl *ar, u32 reg_addr, u32 addr)
178 {
179 int status;
180 u8 addr_val[4];
181 s32 i;
182
183 /*
184 * Write bytes 1,2,3 of the register to set the upper address bytes,
185 * the LSB is written last to initiate the access cycle
186 */
187
188 for (i = 1; i <= 3; i++) {
189 /*
190 * Fill the buffer with the address byte value we want to
191 * hit 4 times.
192 */
193 memset(addr_val, ((u8 *)&addr)[i], 4);
194
195 /*
196 * Hit each byte of the register address with a 4-byte
197 * write operation to the same address, this is a harmless
198 * operation.
199 */
200 status = hif_read_write_sync(ar, reg_addr + i, addr_val,
201 4, HIF_WR_SYNC_BYTE_FIX);
202 if (status)
203 break;
204 }
205
206 if (status) {
207 ath6kl_err("failed to write initial bytes of 0x%x to window reg: 0x%X\n",
208 addr, reg_addr);
209 return status;
210 }
211
212 /*
213 * Write the address register again, this time write the whole
214 * 4-byte value. The effect here is that the LSB write causes the
215 * cycle to start, the extra 3 byte write to bytes 1,2,3 has no
216 * effect since we are writing the same values again
217 */
218 status = hif_read_write_sync(ar, reg_addr, (u8 *)(&addr),
219 4, HIF_WR_SYNC_BYTE_INC);
220
221 if (status) {
222 ath6kl_err("failed to write 0x%x to window reg: 0x%X\n",
223 addr, reg_addr);
224 return status;
225 }
226
227 return 0;
228 }
229
230 /*
231 * Read from the ATH6KL through its diagnostic window. No cooperation from
232 * the Target is required for this.
233 */
234 int ath6kl_read_reg_diag(struct ath6kl *ar, u32 *address, u32 *data)
235 {
236 int status;
237
238 /* set window register to start read cycle */
239 status = ath6kl_set_addrwin_reg(ar, WINDOW_READ_ADDR_ADDRESS,
240 *address);
241
242 if (status)
243 return status;
244
245 /* read the data */
246 status = hif_read_write_sync(ar, WINDOW_DATA_ADDRESS, (u8 *)data,
247 sizeof(u32), HIF_RD_SYNC_BYTE_INC);
248 if (status) {
249 ath6kl_err("failed to read from window data addr\n");
250 return status;
251 }
252
253 return status;
254 }
255
256
257 /*
258 * Write to the ATH6KL through its diagnostic window. No cooperation from
259 * the Target is required for this.
260 */
261 static int ath6kl_write_reg_diag(struct ath6kl *ar, u32 *address, u32 *data)
262 {
263 int status;
264
265 /* set write data */
266 status = hif_read_write_sync(ar, WINDOW_DATA_ADDRESS, (u8 *)data,
267 sizeof(u32), HIF_WR_SYNC_BYTE_INC);
268 if (status) {
269 ath6kl_err("failed to write 0x%x to window data addr\n", *data);
270 return status;
271 }
272
273 /* set window register, which starts the write cycle */
274 return ath6kl_set_addrwin_reg(ar, WINDOW_WRITE_ADDR_ADDRESS,
275 *address);
276 }
277
278 int ath6kl_access_datadiag(struct ath6kl *ar, u32 address,
279 u8 *data, u32 length, bool read)
280 {
281 u32 count;
282 int status = 0;
283
284 for (count = 0; count < length; count += 4, address += 4) {
285 if (read) {
286 status = ath6kl_read_reg_diag(ar, &address,
287 (u32 *) &data[count]);
288 if (status)
289 break;
290 } else {
291 status = ath6kl_write_reg_diag(ar, &address,
292 (u32 *) &data[count]);
293 if (status)
294 break;
295 }
296 }
297
298 return status;
299 }
300
301 static void ath6kl_reset_device(struct ath6kl *ar, u32 target_type,
302 bool wait_fot_compltn, bool cold_reset)
303 {
304 int status = 0;
305 u32 address;
306 u32 data;
307
308 if (target_type != TARGET_TYPE_AR6003)
309 return;
310
311 data = cold_reset ? RESET_CONTROL_COLD_RST : RESET_CONTROL_MBOX_RST;
312
313 address = RTC_BASE_ADDRESS;
314 status = ath6kl_write_reg_diag(ar, &address, &data);
315
316 if (status)
317 ath6kl_err("failed to reset target\n");
318 }
319
320 void ath6kl_stop_endpoint(struct net_device *dev, bool keep_profile,
321 bool get_dbglogs)
322 {
323 struct ath6kl *ar = ath6kl_priv(dev);
324 static u8 bcast_mac[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
325 bool discon_issued;
326
327 netif_stop_queue(dev);
328
329 /* disable the target and the interrupts associated with it */
330 if (test_bit(WMI_READY, &ar->flag)) {
331 discon_issued = (test_bit(CONNECTED, &ar->flag) ||
332 test_bit(CONNECT_PEND, &ar->flag));
333 ath6kl_disconnect(ar);
334 if (!keep_profile)
335 ath6kl_init_profile_info(ar);
336
337 del_timer(&ar->disconnect_timer);
338
339 clear_bit(WMI_READY, &ar->flag);
340 ath6kl_wmi_shutdown(ar->wmi);
341 clear_bit(WMI_ENABLED, &ar->flag);
342 ar->wmi = NULL;
343
344 /*
345 * After wmi_shudown all WMI events will be dropped. We
346 * need to cleanup the buffers allocated in AP mode and
347 * give disconnect notification to stack, which usually
348 * happens in the disconnect_event. Simulate the disconnect
349 * event by calling the function directly. Sometimes
350 * disconnect_event will be received when the debug logs
351 * are collected.
352 */
353 if (discon_issued)
354 ath6kl_disconnect_event(ar, DISCONNECT_CMD,
355 (ar->nw_type & AP_NETWORK) ?
356 bcast_mac : ar->bssid,
357 0, NULL, 0);
358
359 ar->user_key_ctrl = 0;
360
361 } else {
362 ath6kl_dbg(ATH6KL_DBG_TRC,
363 "%s: wmi is not ready 0x%p 0x%p\n",
364 __func__, ar, ar->wmi);
365
366 /* Shut down WMI if we have started it */
367 if (test_bit(WMI_ENABLED, &ar->flag)) {
368 ath6kl_dbg(ATH6KL_DBG_TRC,
369 "%s: shut down wmi\n", __func__);
370 ath6kl_wmi_shutdown(ar->wmi);
371 clear_bit(WMI_ENABLED, &ar->flag);
372 ar->wmi = NULL;
373 }
374 }
375
376 if (ar->htc_target) {
377 ath6kl_dbg(ATH6KL_DBG_TRC, "%s: shut down htc\n", __func__);
378 htc_stop(ar->htc_target);
379 }
380
381 /*
382 * Try to reset the device if we can. The driver may have been
383 * configure NOT to reset the target during a debug session.
384 */
385 ath6kl_dbg(ATH6KL_DBG_TRC,
386 "attempting to reset target on instance destroy\n");
387 ath6kl_reset_device(ar, ar->target_type, true, true);
388 }
389
390 static void ath6kl_install_static_wep_keys(struct ath6kl *ar)
391 {
392 u8 index;
393 u8 keyusage;
394
395 for (index = WMI_MIN_KEY_INDEX; index <= WMI_MAX_KEY_INDEX; index++) {
396 if (ar->wep_key_list[index].key_len) {
397 keyusage = GROUP_USAGE;
398 if (index == ar->def_txkey_index)
399 keyusage |= TX_USAGE;
400
401 ath6kl_wmi_addkey_cmd(ar->wmi,
402 index,
403 WEP_CRYPT,
404 keyusage,
405 ar->wep_key_list[index].key_len,
406 NULL,
407 ar->wep_key_list[index].key,
408 KEY_OP_INIT_VAL, NULL,
409 NO_SYNC_WMIFLAG);
410 }
411 }
412 }
413
414 static void ath6kl_connect_ap_mode(struct ath6kl *ar, u16 channel, u8 *bssid,
415 u16 listen_int, u16 beacon_int,
416 u8 assoc_resp_len, u8 *assoc_info)
417 {
418 struct net_device *dev = ar->net_dev;
419 struct station_info sinfo;
420 struct ath6kl_req_key *ik;
421 enum crypto_type keyType = NONE_CRYPT;
422
423 if (memcmp(dev->dev_addr, bssid, ETH_ALEN) == 0) {
424 ik = &ar->ap_mode_bkey;
425
426 switch (ar->auth_mode) {
427 case NONE_AUTH:
428 if (ar->prwise_crypto == WEP_CRYPT)
429 ath6kl_install_static_wep_keys(ar);
430 break;
431 case WPA_PSK_AUTH:
432 case WPA2_PSK_AUTH:
433 case (WPA_PSK_AUTH|WPA2_PSK_AUTH):
434 switch (ik->ik_type) {
435 case ATH6KL_CIPHER_TKIP:
436 keyType = TKIP_CRYPT;
437 break;
438 case ATH6KL_CIPHER_AES_CCM:
439 keyType = AES_CRYPT;
440 break;
441 default:
442 goto skip_key;
443 }
444 ath6kl_wmi_addkey_cmd(ar->wmi, ik->ik_keyix, keyType,
445 GROUP_USAGE, ik->ik_keylen,
446 (u8 *)&ik->ik_keyrsc,
447 ik->ik_keydata,
448 KEY_OP_INIT_VAL, ik->ik_macaddr,
449 SYNC_BOTH_WMIFLAG);
450 break;
451 }
452 skip_key:
453 set_bit(CONNECTED, &ar->flag);
454 return;
455 }
456
457 ath6kl_dbg(ATH6KL_DBG_TRC, "new station %pM aid=%d\n",
458 bssid, channel);
459
460 ath6kl_add_new_sta(ar, bssid, channel, assoc_info, assoc_resp_len,
461 listen_int & 0xFF, beacon_int,
462 (listen_int >> 8) & 0xFF);
463
464 /* send event to application */
465 memset(&sinfo, 0, sizeof(sinfo));
466
467 /* TODO: sinfo.generation */
468 /* TODO: need to deliver (Re)AssocReq IEs somehow.. change in
469 * cfg80211 needed, e.g., by adding those into sinfo
470 */
471 cfg80211_new_sta(ar->net_dev, bssid, &sinfo, GFP_KERNEL);
472
473 netif_wake_queue(ar->net_dev);
474
475 return;
476 }
477
478 /* Functions for Tx credit handling */
479 void ath6k_credit_init(struct htc_credit_state_info *cred_info,
480 struct list_head *ep_list,
481 int tot_credits)
482 {
483 struct htc_endpoint_credit_dist *cur_ep_dist;
484 int count;
485
486 cred_info->cur_free_credits = tot_credits;
487 cred_info->total_avail_credits = tot_credits;
488
489 list_for_each_entry(cur_ep_dist, ep_list, list) {
490 if (cur_ep_dist->endpoint == ENDPOINT_0)
491 continue;
492
493 cur_ep_dist->cred_min = cur_ep_dist->cred_per_msg;
494
495 if (tot_credits > 4)
496 if ((cur_ep_dist->svc_id == WMI_DATA_BK_SVC) ||
497 (cur_ep_dist->svc_id == WMI_DATA_BE_SVC)) {
498 ath6kl_deposit_credit_to_ep(cred_info,
499 cur_ep_dist,
500 cur_ep_dist->cred_min);
501 cur_ep_dist->dist_flags |= HTC_EP_ACTIVE;
502 }
503
504 if (cur_ep_dist->svc_id == WMI_CONTROL_SVC) {
505 ath6kl_deposit_credit_to_ep(cred_info, cur_ep_dist,
506 cur_ep_dist->cred_min);
507 /*
508 * Control service is always marked active, it
509 * never goes inactive EVER.
510 */
511 cur_ep_dist->dist_flags |= HTC_EP_ACTIVE;
512 } else if (cur_ep_dist->svc_id == WMI_DATA_BK_SVC)
513 /* this is the lowest priority data endpoint */
514 cred_info->lowestpri_ep_dist = cur_ep_dist->list;
515
516 /*
517 * Streams have to be created (explicit | implicit) for all
518 * kinds of traffic. BE endpoints are also inactive in the
519 * beginning. When BE traffic starts it creates implicit
520 * streams that redistributes credits.
521 *
522 * Note: all other endpoints have minimums set but are
523 * initially given NO credits. credits will be distributed
524 * as traffic activity demands
525 */
526 }
527
528 WARN_ON(cred_info->cur_free_credits <= 0);
529
530 list_for_each_entry(cur_ep_dist, ep_list, list) {
531 if (cur_ep_dist->endpoint == ENDPOINT_0)
532 continue;
533
534 if (cur_ep_dist->svc_id == WMI_CONTROL_SVC)
535 cur_ep_dist->cred_norm = cur_ep_dist->cred_per_msg;
536 else {
537 /*
538 * For the remaining data endpoints, we assume that
539 * each cred_per_msg are the same. We use a simple
540 * calculation here, we take the remaining credits
541 * and determine how many max messages this can
542 * cover and then set each endpoint's normal value
543 * equal to 3/4 this amount.
544 */
545 count = (cred_info->cur_free_credits /
546 cur_ep_dist->cred_per_msg)
547 * cur_ep_dist->cred_per_msg;
548 count = (count * 3) >> 2;
549 count = max(count, cur_ep_dist->cred_per_msg);
550 cur_ep_dist->cred_norm = count;
551
552 }
553 }
554 }
555
556 /* initialize and setup credit distribution */
557 int ath6k_setup_credit_dist(void *htc_handle,
558 struct htc_credit_state_info *cred_info)
559 {
560 u16 servicepriority[5];
561
562 memset(cred_info, 0, sizeof(struct htc_credit_state_info));
563
564 servicepriority[0] = WMI_CONTROL_SVC; /* highest */
565 servicepriority[1] = WMI_DATA_VO_SVC;
566 servicepriority[2] = WMI_DATA_VI_SVC;
567 servicepriority[3] = WMI_DATA_BE_SVC;
568 servicepriority[4] = WMI_DATA_BK_SVC; /* lowest */
569
570 /* set priority list */
571 htc_set_credit_dist(htc_handle, cred_info, servicepriority, 5);
572
573 return 0;
574 }
575
576 /* reduce an ep's credits back to a set limit */
577 static void ath6k_reduce_credits(struct htc_credit_state_info *cred_info,
578 struct htc_endpoint_credit_dist *ep_dist,
579 int limit)
580 {
581 int credits;
582
583 ep_dist->cred_assngd = limit;
584
585 if (ep_dist->credits <= limit)
586 return;
587
588 credits = ep_dist->credits - limit;
589 ep_dist->credits -= credits;
590 cred_info->cur_free_credits += credits;
591 }
592
593 static void ath6k_credit_update(struct htc_credit_state_info *cred_info,
594 struct list_head *epdist_list)
595 {
596 struct htc_endpoint_credit_dist *cur_dist_list;
597
598 list_for_each_entry(cur_dist_list, epdist_list, list) {
599 if (cur_dist_list->endpoint == ENDPOINT_0)
600 continue;
601
602 if (cur_dist_list->cred_to_dist > 0) {
603 cur_dist_list->credits +=
604 cur_dist_list->cred_to_dist;
605 cur_dist_list->cred_to_dist = 0;
606 if (cur_dist_list->credits >
607 cur_dist_list->cred_assngd)
608 ath6k_reduce_credits(cred_info,
609 cur_dist_list,
610 cur_dist_list->cred_assngd);
611
612 if (cur_dist_list->credits >
613 cur_dist_list->cred_norm)
614 ath6k_reduce_credits(cred_info, cur_dist_list,
615 cur_dist_list->cred_norm);
616
617 if (!(cur_dist_list->dist_flags & HTC_EP_ACTIVE)) {
618 if (cur_dist_list->txq_depth == 0)
619 ath6k_reduce_credits(cred_info,
620 cur_dist_list, 0);
621 }
622 }
623 }
624 }
625
626 /*
627 * HTC has an endpoint that needs credits, ep_dist is the endpoint in
628 * question.
629 */
630 void ath6k_seek_credits(struct htc_credit_state_info *cred_info,
631 struct htc_endpoint_credit_dist *ep_dist)
632 {
633 struct htc_endpoint_credit_dist *curdist_list;
634 int credits = 0;
635 int need;
636
637 if (ep_dist->svc_id == WMI_CONTROL_SVC)
638 goto out;
639
640 if ((ep_dist->svc_id == WMI_DATA_VI_SVC) ||
641 (ep_dist->svc_id == WMI_DATA_VO_SVC))
642 if ((ep_dist->cred_assngd >= ep_dist->cred_norm))
643 goto out;
644
645 /*
646 * For all other services, we follow a simple algorithm of:
647 *
648 * 1. checking the free pool for credits
649 * 2. checking lower priority endpoints for credits to take
650 */
651
652 credits = min(cred_info->cur_free_credits, ep_dist->seek_cred);
653
654 if (credits >= ep_dist->seek_cred)
655 goto out;
656
657 /*
658 * We don't have enough in the free pool, try taking away from
659 * lower priority services The rule for taking away credits:
660 *
661 * 1. Only take from lower priority endpoints
662 * 2. Only take what is allocated above the minimum (never
663 * starve an endpoint completely)
664 * 3. Only take what you need.
665 */
666
667 list_for_each_entry_reverse(curdist_list,
668 &cred_info->lowestpri_ep_dist,
669 list) {
670 if (curdist_list == ep_dist)
671 break;
672
673 need = ep_dist->seek_cred - cred_info->cur_free_credits;
674
675 if ((curdist_list->cred_assngd - need) >=
676 curdist_list->cred_min) {
677 /*
678 * The current one has been allocated more than
679 * it's minimum and it has enough credits assigned
680 * above it's minimum to fulfill our need try to
681 * take away just enough to fulfill our need.
682 */
683 ath6k_reduce_credits(cred_info, curdist_list,
684 curdist_list->cred_assngd - need);
685
686 if (cred_info->cur_free_credits >=
687 ep_dist->seek_cred)
688 break;
689 }
690
691 if (curdist_list->endpoint == ENDPOINT_0)
692 break;
693 }
694
695 credits = min(cred_info->cur_free_credits, ep_dist->seek_cred);
696
697 out:
698 /* did we find some credits? */
699 if (credits)
700 ath6kl_deposit_credit_to_ep(cred_info, ep_dist, credits);
701
702 ep_dist->seek_cred = 0;
703 }
704
705 /* redistribute credits based on activity change */
706 static void ath6k_redistribute_credits(struct htc_credit_state_info *info,
707 struct list_head *ep_dist_list)
708 {
709 struct htc_endpoint_credit_dist *curdist_list;
710
711 list_for_each_entry(curdist_list, ep_dist_list, list) {
712 if (curdist_list->endpoint == ENDPOINT_0)
713 continue;
714
715 if ((curdist_list->svc_id == WMI_DATA_BK_SVC) ||
716 (curdist_list->svc_id == WMI_DATA_BE_SVC))
717 curdist_list->dist_flags |= HTC_EP_ACTIVE;
718
719 if ((curdist_list->svc_id != WMI_CONTROL_SVC) &&
720 !(curdist_list->dist_flags & HTC_EP_ACTIVE)) {
721 if (curdist_list->txq_depth == 0)
722 ath6k_reduce_credits(info,
723 curdist_list, 0);
724 else
725 ath6k_reduce_credits(info,
726 curdist_list,
727 curdist_list->cred_min);
728 }
729 }
730 }
731
732 /*
733 *
734 * This function is invoked whenever endpoints require credit
735 * distributions. A lock is held while this function is invoked, this
736 * function shall NOT block. The ep_dist_list is a list of distribution
737 * structures in prioritized order as defined by the call to the
738 * htc_set_credit_dist() api.
739 */
740 void ath6k_credit_distribute(struct htc_credit_state_info *cred_info,
741 struct list_head *ep_dist_list,
742 enum htc_credit_dist_reason reason)
743 {
744 switch (reason) {
745 case HTC_CREDIT_DIST_SEND_COMPLETE:
746 ath6k_credit_update(cred_info, ep_dist_list);
747 break;
748 case HTC_CREDIT_DIST_ACTIVITY_CHANGE:
749 ath6k_redistribute_credits(cred_info, ep_dist_list);
750 break;
751 default:
752 break;
753 }
754
755 WARN_ON(cred_info->cur_free_credits > cred_info->total_avail_credits);
756 WARN_ON(cred_info->cur_free_credits < 0);
757 }
758
759 void disconnect_timer_handler(unsigned long ptr)
760 {
761 struct net_device *dev = (struct net_device *)ptr;
762 struct ath6kl *ar = ath6kl_priv(dev);
763
764 ath6kl_init_profile_info(ar);
765 ath6kl_disconnect(ar);
766 }
767
768 void ath6kl_disconnect(struct ath6kl *ar)
769 {
770 if (test_bit(CONNECTED, &ar->flag) ||
771 test_bit(CONNECT_PEND, &ar->flag)) {
772 ath6kl_wmi_disconnect_cmd(ar->wmi);
773 /*
774 * Disconnect command is issued, clear the connect pending
775 * flag. The connected flag will be cleared in
776 * disconnect event notification.
777 */
778 clear_bit(CONNECT_PEND, &ar->flag);
779 }
780 }
781
782 /* WMI Event handlers */
783
784 static const char *get_hw_id_string(u32 id)
785 {
786 switch (id) {
787 case AR6003_REV1_VERSION:
788 return "1.0";
789 case AR6003_REV2_VERSION:
790 return "2.0";
791 case AR6003_REV3_VERSION:
792 return "2.1.1";
793 default:
794 return "unknown";
795 }
796 }
797
798 void ath6kl_ready_event(void *devt, u8 *datap, u32 sw_ver, u32 abi_ver)
799 {
800 struct ath6kl *ar = devt;
801 struct net_device *dev = ar->net_dev;
802
803 memcpy(dev->dev_addr, datap, ETH_ALEN);
804 ath6kl_dbg(ATH6KL_DBG_TRC, "%s: mac addr = %pM\n",
805 __func__, dev->dev_addr);
806
807 ar->version.wlan_ver = sw_ver;
808 ar->version.abi_ver = abi_ver;
809
810 snprintf(ar->wdev->wiphy->fw_version,
811 sizeof(ar->wdev->wiphy->fw_version),
812 "%u.%u.%u.%u",
813 (ar->version.wlan_ver & 0xf0000000) >> 28,
814 (ar->version.wlan_ver & 0x0f000000) >> 24,
815 (ar->version.wlan_ver & 0x00ff0000) >> 16,
816 (ar->version.wlan_ver & 0x0000ffff));
817
818 /* indicate to the waiting thread that the ready event was received */
819 set_bit(WMI_READY, &ar->flag);
820 wake_up(&ar->event_wq);
821
822 ath6kl_info("hw %s fw %s\n",
823 get_hw_id_string(ar->wdev->wiphy->hw_version),
824 ar->wdev->wiphy->fw_version);
825 }
826
827 void ath6kl_scan_complete_evt(struct ath6kl *ar, int status)
828 {
829 ath6kl_cfg80211_scan_complete_event(ar, status);
830
831 if (!ar->usr_bss_filter)
832 ath6kl_wmi_bssfilter_cmd(ar->wmi, NONE_BSS_FILTER, 0);
833
834 ath6kl_dbg(ATH6KL_DBG_WLAN_SCAN, "scan complete: %d\n", status);
835 }
836
837 void ath6kl_connect_event(struct ath6kl *ar, u16 channel, u8 *bssid,
838 u16 listen_int, u16 beacon_int,
839 enum network_type net_type, u8 beacon_ie_len,
840 u8 assoc_req_len, u8 assoc_resp_len,
841 u8 *assoc_info)
842 {
843 unsigned long flags;
844
845 if (ar->nw_type == AP_NETWORK) {
846 ath6kl_connect_ap_mode(ar, channel, bssid, listen_int,
847 beacon_int, assoc_resp_len,
848 assoc_info);
849 return;
850 }
851
852 ath6kl_cfg80211_connect_event(ar, channel, bssid,
853 listen_int, beacon_int,
854 net_type, beacon_ie_len,
855 assoc_req_len, assoc_resp_len,
856 assoc_info);
857
858 memcpy(ar->bssid, bssid, sizeof(ar->bssid));
859 ar->bss_ch = channel;
860
861 if ((ar->nw_type == INFRA_NETWORK))
862 ath6kl_wmi_listeninterval_cmd(ar->wmi, ar->listen_intvl_t,
863 ar->listen_intvl_b);
864
865 netif_wake_queue(ar->net_dev);
866
867 /* Update connect & link status atomically */
868 spin_lock_irqsave(&ar->lock, flags);
869 set_bit(CONNECTED, &ar->flag);
870 clear_bit(CONNECT_PEND, &ar->flag);
871 netif_carrier_on(ar->net_dev);
872 spin_unlock_irqrestore(&ar->lock, flags);
873
874 aggr_reset_state(ar->aggr_cntxt);
875 ar->reconnect_flag = 0;
876
877 if ((ar->nw_type == ADHOC_NETWORK) && ar->ibss_ps_enable) {
878 memset(ar->node_map, 0, sizeof(ar->node_map));
879 ar->node_num = 0;
880 ar->next_ep_id = ENDPOINT_2;
881 }
882
883 if (!ar->usr_bss_filter)
884 ath6kl_wmi_bssfilter_cmd(ar->wmi, NONE_BSS_FILTER, 0);
885 }
886
887 void ath6kl_tkip_micerr_event(struct ath6kl *ar, u8 keyid, bool ismcast)
888 {
889 struct ath6kl_sta *sta;
890 u8 tsc[6];
891 /*
892 * For AP case, keyid will have aid of STA which sent pkt with
893 * MIC error. Use this aid to get MAC & send it to hostapd.
894 */
895 if (ar->nw_type == AP_NETWORK) {
896 sta = ath6kl_find_sta_by_aid(ar, (keyid >> 2));
897 if (!sta)
898 return;
899
900 ath6kl_dbg(ATH6KL_DBG_TRC,
901 "ap tkip mic error received from aid=%d\n", keyid);
902
903 memset(tsc, 0, sizeof(tsc)); /* FIX: get correct TSC */
904 cfg80211_michael_mic_failure(ar->net_dev, sta->mac,
905 NL80211_KEYTYPE_PAIRWISE, keyid,
906 tsc, GFP_KERNEL);
907 } else
908 ath6kl_cfg80211_tkip_micerr_event(ar, keyid, ismcast);
909
910 }
911
912 static void ath6kl_update_target_stats(struct ath6kl *ar, u8 *ptr, u32 len)
913 {
914 struct wmi_target_stats *tgt_stats =
915 (struct wmi_target_stats *) ptr;
916 struct target_stats *stats = &ar->target_stats;
917 struct tkip_ccmp_stats *ccmp_stats;
918 struct bss *conn_bss = NULL;
919 struct cserv_stats *c_stats;
920 u8 ac;
921
922 if (len < sizeof(*tgt_stats))
923 return;
924
925 /* update the RSSI of the connected bss */
926 if (test_bit(CONNECTED, &ar->flag)) {
927 conn_bss = ath6kl_wmi_find_node(ar->wmi, ar->bssid);
928 if (conn_bss) {
929 c_stats = &tgt_stats->cserv_stats;
930 conn_bss->ni_rssi =
931 a_sle16_to_cpu(c_stats->cs_ave_beacon_rssi);
932 conn_bss->ni_snr =
933 tgt_stats->cserv_stats.cs_ave_beacon_snr;
934 ath6kl_wmi_node_return(ar->wmi, conn_bss);
935 }
936 }
937
938 ath6kl_dbg(ATH6KL_DBG_TRC, "updating target stats\n");
939
940 stats->tx_pkt += le32_to_cpu(tgt_stats->stats.tx.pkt);
941 stats->tx_byte += le32_to_cpu(tgt_stats->stats.tx.byte);
942 stats->tx_ucast_pkt += le32_to_cpu(tgt_stats->stats.tx.ucast_pkt);
943 stats->tx_ucast_byte += le32_to_cpu(tgt_stats->stats.tx.ucast_byte);
944 stats->tx_mcast_pkt += le32_to_cpu(tgt_stats->stats.tx.mcast_pkt);
945 stats->tx_mcast_byte += le32_to_cpu(tgt_stats->stats.tx.mcast_byte);
946 stats->tx_bcast_pkt += le32_to_cpu(tgt_stats->stats.tx.bcast_pkt);
947 stats->tx_bcast_byte += le32_to_cpu(tgt_stats->stats.tx.bcast_byte);
948 stats->tx_rts_success_cnt +=
949 le32_to_cpu(tgt_stats->stats.tx.rts_success_cnt);
950
951 for (ac = 0; ac < WMM_NUM_AC; ac++)
952 stats->tx_pkt_per_ac[ac] +=
953 le32_to_cpu(tgt_stats->stats.tx.pkt_per_ac[ac]);
954
955 stats->tx_err += le32_to_cpu(tgt_stats->stats.tx.err);
956 stats->tx_fail_cnt += le32_to_cpu(tgt_stats->stats.tx.fail_cnt);
957 stats->tx_retry_cnt += le32_to_cpu(tgt_stats->stats.tx.retry_cnt);
958 stats->tx_mult_retry_cnt +=
959 le32_to_cpu(tgt_stats->stats.tx.mult_retry_cnt);
960 stats->tx_rts_fail_cnt +=
961 le32_to_cpu(tgt_stats->stats.tx.rts_fail_cnt);
962 stats->tx_ucast_rate =
963 ath6kl_wmi_get_rate(a_sle32_to_cpu(tgt_stats->stats.tx.ucast_rate));
964
965 stats->rx_pkt += le32_to_cpu(tgt_stats->stats.rx.pkt);
966 stats->rx_byte += le32_to_cpu(tgt_stats->stats.rx.byte);
967 stats->rx_ucast_pkt += le32_to_cpu(tgt_stats->stats.rx.ucast_pkt);
968 stats->rx_ucast_byte += le32_to_cpu(tgt_stats->stats.rx.ucast_byte);
969 stats->rx_mcast_pkt += le32_to_cpu(tgt_stats->stats.rx.mcast_pkt);
970 stats->rx_mcast_byte += le32_to_cpu(tgt_stats->stats.rx.mcast_byte);
971 stats->rx_bcast_pkt += le32_to_cpu(tgt_stats->stats.rx.bcast_pkt);
972 stats->rx_bcast_byte += le32_to_cpu(tgt_stats->stats.rx.bcast_byte);
973 stats->rx_frgment_pkt += le32_to_cpu(tgt_stats->stats.rx.frgment_pkt);
974 stats->rx_err += le32_to_cpu(tgt_stats->stats.rx.err);
975 stats->rx_crc_err += le32_to_cpu(tgt_stats->stats.rx.crc_err);
976 stats->rx_key_cache_miss +=
977 le32_to_cpu(tgt_stats->stats.rx.key_cache_miss);
978 stats->rx_decrypt_err += le32_to_cpu(tgt_stats->stats.rx.decrypt_err);
979 stats->rx_dupl_frame += le32_to_cpu(tgt_stats->stats.rx.dupl_frame);
980 stats->rx_ucast_rate =
981 ath6kl_wmi_get_rate(a_sle32_to_cpu(tgt_stats->stats.rx.ucast_rate));
982
983 ccmp_stats = &tgt_stats->stats.tkip_ccmp_stats;
984
985 stats->tkip_local_mic_fail +=
986 le32_to_cpu(ccmp_stats->tkip_local_mic_fail);
987 stats->tkip_cnter_measures_invoked +=
988 le32_to_cpu(ccmp_stats->tkip_cnter_measures_invoked);
989 stats->tkip_fmt_err += le32_to_cpu(ccmp_stats->tkip_fmt_err);
990
991 stats->ccmp_fmt_err += le32_to_cpu(ccmp_stats->ccmp_fmt_err);
992 stats->ccmp_replays += le32_to_cpu(ccmp_stats->ccmp_replays);
993
994 stats->pwr_save_fail_cnt +=
995 le32_to_cpu(tgt_stats->pm_stats.pwr_save_failure_cnt);
996 stats->noise_floor_calib =
997 a_sle32_to_cpu(tgt_stats->noise_floor_calib);
998
999 stats->cs_bmiss_cnt +=
1000 le32_to_cpu(tgt_stats->cserv_stats.cs_bmiss_cnt);
1001 stats->cs_low_rssi_cnt +=
1002 le32_to_cpu(tgt_stats->cserv_stats.cs_low_rssi_cnt);
1003 stats->cs_connect_cnt +=
1004 le16_to_cpu(tgt_stats->cserv_stats.cs_connect_cnt);
1005 stats->cs_discon_cnt +=
1006 le16_to_cpu(tgt_stats->cserv_stats.cs_discon_cnt);
1007
1008 stats->cs_ave_beacon_rssi =
1009 a_sle16_to_cpu(tgt_stats->cserv_stats.cs_ave_beacon_rssi);
1010
1011 stats->cs_last_roam_msec =
1012 tgt_stats->cserv_stats.cs_last_roam_msec;
1013 stats->cs_snr = tgt_stats->cserv_stats.cs_snr;
1014 stats->cs_rssi = a_sle16_to_cpu(tgt_stats->cserv_stats.cs_rssi);
1015
1016 stats->lq_val = le32_to_cpu(tgt_stats->lq_val);
1017
1018 stats->wow_pkt_dropped +=
1019 le32_to_cpu(tgt_stats->wow_stats.wow_pkt_dropped);
1020 stats->wow_host_pkt_wakeups +=
1021 tgt_stats->wow_stats.wow_host_pkt_wakeups;
1022 stats->wow_host_evt_wakeups +=
1023 tgt_stats->wow_stats.wow_host_evt_wakeups;
1024 stats->wow_evt_discarded +=
1025 le16_to_cpu(tgt_stats->wow_stats.wow_evt_discarded);
1026
1027 if (test_bit(STATS_UPDATE_PEND, &ar->flag)) {
1028 clear_bit(STATS_UPDATE_PEND, &ar->flag);
1029 wake_up(&ar->event_wq);
1030 }
1031 }
1032
1033 static void ath6kl_add_le32(__le32 *var, __le32 val)
1034 {
1035 *var = cpu_to_le32(le32_to_cpu(*var) + le32_to_cpu(val));
1036 }
1037
1038 void ath6kl_tgt_stats_event(struct ath6kl *ar, u8 *ptr, u32 len)
1039 {
1040 struct wmi_ap_mode_stat *p = (struct wmi_ap_mode_stat *) ptr;
1041 struct wmi_ap_mode_stat *ap = &ar->ap_stats;
1042 struct wmi_per_sta_stat *st_ap, *st_p;
1043 u8 ac;
1044
1045 if (ar->nw_type == AP_NETWORK) {
1046 if (len < sizeof(*p))
1047 return;
1048
1049 for (ac = 0; ac < AP_MAX_NUM_STA; ac++) {
1050 st_ap = &ap->sta[ac];
1051 st_p = &p->sta[ac];
1052
1053 ath6kl_add_le32(&st_ap->tx_bytes, st_p->tx_bytes);
1054 ath6kl_add_le32(&st_ap->tx_pkts, st_p->tx_pkts);
1055 ath6kl_add_le32(&st_ap->tx_error, st_p->tx_error);
1056 ath6kl_add_le32(&st_ap->tx_discard, st_p->tx_discard);
1057 ath6kl_add_le32(&st_ap->rx_bytes, st_p->rx_bytes);
1058 ath6kl_add_le32(&st_ap->rx_pkts, st_p->rx_pkts);
1059 ath6kl_add_le32(&st_ap->rx_error, st_p->rx_error);
1060 ath6kl_add_le32(&st_ap->rx_discard, st_p->rx_discard);
1061 }
1062
1063 } else {
1064 ath6kl_update_target_stats(ar, ptr, len);
1065 }
1066 }
1067
1068 void ath6kl_wakeup_event(void *dev)
1069 {
1070 struct ath6kl *ar = (struct ath6kl *) dev;
1071
1072 wake_up(&ar->event_wq);
1073 }
1074
1075 void ath6kl_txpwr_rx_evt(void *devt, u8 tx_pwr)
1076 {
1077 struct ath6kl *ar = (struct ath6kl *) devt;
1078
1079 ar->tx_pwr = tx_pwr;
1080 wake_up(&ar->event_wq);
1081 }
1082
1083 void ath6kl_pspoll_event(struct ath6kl *ar, u8 aid)
1084 {
1085 struct ath6kl_sta *conn;
1086 struct sk_buff *skb;
1087 bool psq_empty = false;
1088
1089 conn = ath6kl_find_sta_by_aid(ar, aid);
1090
1091 if (!conn)
1092 return;
1093 /*
1094 * Send out a packet queued on ps queue. When the ps queue
1095 * becomes empty update the PVB for this station.
1096 */
1097 spin_lock_bh(&conn->psq_lock);
1098 psq_empty = skb_queue_empty(&conn->psq);
1099 spin_unlock_bh(&conn->psq_lock);
1100
1101 if (psq_empty)
1102 /* TODO: Send out a NULL data frame */
1103 return;
1104
1105 spin_lock_bh(&conn->psq_lock);
1106 skb = skb_dequeue(&conn->psq);
1107 spin_unlock_bh(&conn->psq_lock);
1108
1109 conn->sta_flags |= STA_PS_POLLED;
1110 ath6kl_data_tx(skb, ar->net_dev);
1111 conn->sta_flags &= ~STA_PS_POLLED;
1112
1113 spin_lock_bh(&conn->psq_lock);
1114 psq_empty = skb_queue_empty(&conn->psq);
1115 spin_unlock_bh(&conn->psq_lock);
1116
1117 if (psq_empty)
1118 ath6kl_wmi_set_pvb_cmd(ar->wmi, conn->aid, 0);
1119 }
1120
1121 void ath6kl_dtimexpiry_event(struct ath6kl *ar)
1122 {
1123 bool mcastq_empty = false;
1124 struct sk_buff *skb;
1125
1126 /*
1127 * If there are no associated STAs, ignore the DTIM expiry event.
1128 * There can be potential race conditions where the last associated
1129 * STA may disconnect & before the host could clear the 'Indicate
1130 * DTIM' request to the firmware, the firmware would have just
1131 * indicated a DTIM expiry event. The race is between 'clear DTIM
1132 * expiry cmd' going from the host to the firmware & the DTIM
1133 * expiry event happening from the firmware to the host.
1134 */
1135 if (!ar->sta_list_index)
1136 return;
1137
1138 spin_lock_bh(&ar->mcastpsq_lock);
1139 mcastq_empty = skb_queue_empty(&ar->mcastpsq);
1140 spin_unlock_bh(&ar->mcastpsq_lock);
1141
1142 if (mcastq_empty)
1143 return;
1144
1145 /* set the STA flag to dtim_expired for the frame to go out */
1146 set_bit(DTIM_EXPIRED, &ar->flag);
1147
1148 spin_lock_bh(&ar->mcastpsq_lock);
1149 while ((skb = skb_dequeue(&ar->mcastpsq)) != NULL) {
1150 spin_unlock_bh(&ar->mcastpsq_lock);
1151
1152 ath6kl_data_tx(skb, ar->net_dev);
1153
1154 spin_lock_bh(&ar->mcastpsq_lock);
1155 }
1156 spin_unlock_bh(&ar->mcastpsq_lock);
1157
1158 clear_bit(DTIM_EXPIRED, &ar->flag);
1159
1160 /* clear the LSB of the BitMapCtl field of the TIM IE */
1161 ath6kl_wmi_set_pvb_cmd(ar->wmi, MCAST_AID, 0);
1162 }
1163
1164 void ath6kl_disconnect_event(struct ath6kl *ar, u8 reason, u8 *bssid,
1165 u8 assoc_resp_len, u8 *assoc_info,
1166 u16 prot_reason_status)
1167 {
1168 struct bss *wmi_ssid_node = NULL;
1169 unsigned long flags;
1170
1171 if (ar->nw_type == AP_NETWORK) {
1172 if (!ath6kl_remove_sta(ar, bssid, prot_reason_status))
1173 return;
1174
1175 /* if no more associated STAs, empty the mcast PS q */
1176 if (ar->sta_list_index == 0) {
1177 spin_lock_bh(&ar->mcastpsq_lock);
1178 skb_queue_purge(&ar->mcastpsq);
1179 spin_unlock_bh(&ar->mcastpsq_lock);
1180
1181 /* clear the LSB of the TIM IE's BitMapCtl field */
1182 if (test_bit(WMI_READY, &ar->flag))
1183 ath6kl_wmi_set_pvb_cmd(ar->wmi, MCAST_AID, 0);
1184 }
1185
1186 if (!is_broadcast_ether_addr(bssid)) {
1187 /* send event to application */
1188 cfg80211_del_sta(ar->net_dev, bssid, GFP_KERNEL);
1189 }
1190
1191 clear_bit(CONNECTED, &ar->flag);
1192 return;
1193 }
1194
1195 ath6kl_cfg80211_disconnect_event(ar, reason, bssid,
1196 assoc_resp_len, assoc_info,
1197 prot_reason_status);
1198
1199 aggr_reset_state(ar->aggr_cntxt);
1200
1201 del_timer(&ar->disconnect_timer);
1202
1203 ath6kl_dbg(ATH6KL_DBG_WLAN_CONNECT,
1204 "disconnect reason is %d\n", reason);
1205
1206 /*
1207 * If the event is due to disconnect cmd from the host, only they
1208 * the target would stop trying to connect. Under any other
1209 * condition, target would keep trying to connect.
1210 */
1211 if (reason == DISCONNECT_CMD) {
1212 if (!ar->usr_bss_filter && test_bit(WMI_READY, &ar->flag))
1213 ath6kl_wmi_bssfilter_cmd(ar->wmi, NONE_BSS_FILTER, 0);
1214 } else {
1215 set_bit(CONNECT_PEND, &ar->flag);
1216 if (((reason == ASSOC_FAILED) &&
1217 (prot_reason_status == 0x11)) ||
1218 ((reason == ASSOC_FAILED) && (prot_reason_status == 0x0)
1219 && (ar->reconnect_flag == 1))) {
1220 set_bit(CONNECTED, &ar->flag);
1221 return;
1222 }
1223 }
1224
1225 if ((reason == NO_NETWORK_AVAIL) && test_bit(WMI_READY, &ar->flag)) {
1226 ath6kl_wmi_node_free(ar->wmi, bssid);
1227
1228 /*
1229 * In case any other same SSID nodes are present remove it,
1230 * since those nodes also not available now.
1231 */
1232 do {
1233 /*
1234 * Find the nodes based on SSID and remove it
1235 *
1236 * Note: This case will not work out for
1237 * Hidden-SSID
1238 */
1239 wmi_ssid_node = ath6kl_wmi_find_ssid_node(ar->wmi,
1240 ar->ssid,
1241 ar->ssid_len,
1242 false,
1243 true);
1244
1245 if (wmi_ssid_node)
1246 ath6kl_wmi_node_free(ar->wmi,
1247 wmi_ssid_node->ni_macaddr);
1248
1249 } while (wmi_ssid_node);
1250 }
1251
1252 /* update connect & link status atomically */
1253 spin_lock_irqsave(&ar->lock, flags);
1254 clear_bit(CONNECTED, &ar->flag);
1255 netif_carrier_off(ar->net_dev);
1256 spin_unlock_irqrestore(&ar->lock, flags);
1257
1258 if ((reason != CSERV_DISCONNECT) || (ar->reconnect_flag != 1))
1259 ar->reconnect_flag = 0;
1260
1261 if (reason != CSERV_DISCONNECT)
1262 ar->user_key_ctrl = 0;
1263
1264 netif_stop_queue(ar->net_dev);
1265 memset(ar->bssid, 0, sizeof(ar->bssid));
1266 ar->bss_ch = 0;
1267
1268 ath6kl_tx_data_cleanup(ar);
1269 }
1270
1271 static int ath6kl_open(struct net_device *dev)
1272 {
1273 struct ath6kl *ar = ath6kl_priv(dev);
1274 unsigned long flags;
1275
1276 spin_lock_irqsave(&ar->lock, flags);
1277
1278 ar->wlan_state = WLAN_ENABLED;
1279
1280 if (test_bit(CONNECTED, &ar->flag)) {
1281 netif_carrier_on(dev);
1282 netif_wake_queue(dev);
1283 } else
1284 netif_carrier_off(dev);
1285
1286 spin_unlock_irqrestore(&ar->lock, flags);
1287
1288 return 0;
1289 }
1290
1291 static int ath6kl_close(struct net_device *dev)
1292 {
1293 struct ath6kl *ar = ath6kl_priv(dev);
1294
1295 netif_stop_queue(dev);
1296
1297 ath6kl_disconnect(ar);
1298
1299 if (test_bit(WMI_READY, &ar->flag)) {
1300 if (ath6kl_wmi_scanparams_cmd(ar->wmi, 0xFFFF, 0, 0, 0, 0, 0, 0,
1301 0, 0, 0))
1302 return -EIO;
1303
1304 ar->wlan_state = WLAN_DISABLED;
1305 }
1306
1307 ath6kl_cfg80211_scan_complete_event(ar, -ECANCELED);
1308
1309 return 0;
1310 }
1311
1312 static struct net_device_stats *ath6kl_get_stats(struct net_device *dev)
1313 {
1314 struct ath6kl *ar = ath6kl_priv(dev);
1315
1316 return &ar->net_stats;
1317 }
1318
1319 static struct net_device_ops ath6kl_netdev_ops = {
1320 .ndo_open = ath6kl_open,
1321 .ndo_stop = ath6kl_close,
1322 .ndo_start_xmit = ath6kl_data_tx,
1323 .ndo_get_stats = ath6kl_get_stats,
1324 };
1325
1326 void init_netdev(struct net_device *dev)
1327 {
1328 dev->netdev_ops = &ath6kl_netdev_ops;
1329 dev->watchdog_timeo = ATH6KL_TX_TIMEOUT;
1330
1331 dev->needed_headroom = ETH_HLEN;
1332 dev->needed_headroom += sizeof(struct ath6kl_llc_snap_hdr) +
1333 sizeof(struct wmi_data_hdr) + HTC_HDR_LENGTH
1334 + WMI_MAX_TX_META_SZ;
1335
1336 return;
1337 }
Linux kernel - Deliverables
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