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ath6kl: Fix AP mode (Re)AssocReq IE processing
[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 if (ielen <= ATH6KL_MAX_IE)
65 memcpy(sta->wpa_ie, wpaie, ielen);
66 sta->aid = aid;
67 sta->keymgmt = keymgmt;
68 sta->ucipher = ucipher;
69 sta->auth = auth;
70
71 ar->sta_list_index = ar->sta_list_index | (1 << free_slot);
72 ar->ap_stats.sta[free_slot].aid = cpu_to_le32(aid);
73 }
74
75 static void ath6kl_sta_cleanup(struct ath6kl *ar, u8 i)
76 {
77 struct ath6kl_sta *sta = &ar->sta_list[i];
78
79 /* empty the queued pkts in the PS queue if any */
80 spin_lock_bh(&sta->psq_lock);
81 skb_queue_purge(&sta->psq);
82 spin_unlock_bh(&sta->psq_lock);
83
84 memset(&ar->ap_stats.sta[sta->aid - 1], 0,
85 sizeof(struct wmi_per_sta_stat));
86 memset(sta->mac, 0, ETH_ALEN);
87 memset(sta->wpa_ie, 0, ATH6KL_MAX_IE);
88 sta->aid = 0;
89 sta->sta_flags = 0;
90
91 ar->sta_list_index = ar->sta_list_index & ~(1 << i);
92
93 }
94
95 static u8 ath6kl_remove_sta(struct ath6kl *ar, u8 *mac, u16 reason)
96 {
97 u8 i, removed = 0;
98
99 if (is_zero_ether_addr(mac))
100 return removed;
101
102 if (is_broadcast_ether_addr(mac)) {
103 ath6kl_dbg(ATH6KL_DBG_TRC, "deleting all station\n");
104
105 for (i = 0; i < AP_MAX_NUM_STA; i++) {
106 if (!is_zero_ether_addr(ar->sta_list[i].mac)) {
107 ath6kl_sta_cleanup(ar, i);
108 removed = 1;
109 }
110 }
111 } else {
112 for (i = 0; i < AP_MAX_NUM_STA; i++) {
113 if (memcmp(ar->sta_list[i].mac, mac, ETH_ALEN) == 0) {
114 ath6kl_dbg(ATH6KL_DBG_TRC,
115 "deleting station %pM aid=%d reason=%d\n",
116 mac, ar->sta_list[i].aid, reason);
117 ath6kl_sta_cleanup(ar, i);
118 removed = 1;
119 break;
120 }
121 }
122 }
123
124 return removed;
125 }
126
127 enum htc_endpoint_id ath6kl_ac2_endpoint_id(void *devt, u8 ac)
128 {
129 struct ath6kl *ar = devt;
130 return ar->ac2ep_map[ac];
131 }
132
133 struct ath6kl_cookie *ath6kl_alloc_cookie(struct ath6kl *ar)
134 {
135 struct ath6kl_cookie *cookie;
136
137 cookie = ar->cookie_list;
138 if (cookie != NULL) {
139 ar->cookie_list = cookie->arc_list_next;
140 ar->cookie_count--;
141 }
142
143 return cookie;
144 }
145
146 void ath6kl_cookie_init(struct ath6kl *ar)
147 {
148 u32 i;
149
150 ar->cookie_list = NULL;
151 ar->cookie_count = 0;
152
153 memset(ar->cookie_mem, 0, sizeof(ar->cookie_mem));
154
155 for (i = 0; i < MAX_COOKIE_NUM; i++)
156 ath6kl_free_cookie(ar, &ar->cookie_mem[i]);
157 }
158
159 void ath6kl_cookie_cleanup(struct ath6kl *ar)
160 {
161 ar->cookie_list = NULL;
162 ar->cookie_count = 0;
163 }
164
165 void ath6kl_free_cookie(struct ath6kl *ar, struct ath6kl_cookie *cookie)
166 {
167 /* Insert first */
168
169 if (!ar || !cookie)
170 return;
171
172 cookie->arc_list_next = ar->cookie_list;
173 ar->cookie_list = cookie;
174 ar->cookie_count++;
175 }
176
177 /* set the window address register (using 4-byte register access ). */
178 static int ath6kl_set_addrwin_reg(struct ath6kl *ar, u32 reg_addr, u32 addr)
179 {
180 int status;
181 u8 addr_val[4];
182 s32 i;
183
184 /*
185 * Write bytes 1,2,3 of the register to set the upper address bytes,
186 * the LSB is written last to initiate the access cycle
187 */
188
189 for (i = 1; i <= 3; i++) {
190 /*
191 * Fill the buffer with the address byte value we want to
192 * hit 4 times.
193 */
194 memset(addr_val, ((u8 *)&addr)[i], 4);
195
196 /*
197 * Hit each byte of the register address with a 4-byte
198 * write operation to the same address, this is a harmless
199 * operation.
200 */
201 status = hif_read_write_sync(ar, reg_addr + i, addr_val,
202 4, HIF_WR_SYNC_BYTE_FIX);
203 if (status)
204 break;
205 }
206
207 if (status) {
208 ath6kl_err("failed to write initial bytes of 0x%x to window reg: 0x%X\n",
209 addr, reg_addr);
210 return status;
211 }
212
213 /*
214 * Write the address register again, this time write the whole
215 * 4-byte value. The effect here is that the LSB write causes the
216 * cycle to start, the extra 3 byte write to bytes 1,2,3 has no
217 * effect since we are writing the same values again
218 */
219 status = hif_read_write_sync(ar, reg_addr, (u8 *)(&addr),
220 4, HIF_WR_SYNC_BYTE_INC);
221
222 if (status) {
223 ath6kl_err("failed to write 0x%x to window reg: 0x%X\n",
224 addr, reg_addr);
225 return status;
226 }
227
228 return 0;
229 }
230
231 /*
232 * Read from the ATH6KL through its diagnostic window. No cooperation from
233 * the Target is required for this.
234 */
235 int ath6kl_read_reg_diag(struct ath6kl *ar, u32 *address, u32 *data)
236 {
237 int status;
238
239 /* set window register to start read cycle */
240 status = ath6kl_set_addrwin_reg(ar, WINDOW_READ_ADDR_ADDRESS,
241 *address);
242
243 if (status)
244 return status;
245
246 /* read the data */
247 status = hif_read_write_sync(ar, WINDOW_DATA_ADDRESS, (u8 *)data,
248 sizeof(u32), HIF_RD_SYNC_BYTE_INC);
249 if (status) {
250 ath6kl_err("failed to read from window data addr\n");
251 return status;
252 }
253
254 return status;
255 }
256
257
258 /*
259 * Write to the ATH6KL through its diagnostic window. No cooperation from
260 * the Target is required for this.
261 */
262 static int ath6kl_write_reg_diag(struct ath6kl *ar, u32 *address, u32 *data)
263 {
264 int status;
265
266 /* set write data */
267 status = hif_read_write_sync(ar, WINDOW_DATA_ADDRESS, (u8 *)data,
268 sizeof(u32), HIF_WR_SYNC_BYTE_INC);
269 if (status) {
270 ath6kl_err("failed to write 0x%x to window data addr\n", *data);
271 return status;
272 }
273
274 /* set window register, which starts the write cycle */
275 return ath6kl_set_addrwin_reg(ar, WINDOW_WRITE_ADDR_ADDRESS,
276 *address);
277 }
278
279 int ath6kl_access_datadiag(struct ath6kl *ar, u32 address,
280 u8 *data, u32 length, bool read)
281 {
282 u32 count;
283 int status = 0;
284
285 for (count = 0; count < length; count += 4, address += 4) {
286 if (read) {
287 status = ath6kl_read_reg_diag(ar, &address,
288 (u32 *) &data[count]);
289 if (status)
290 break;
291 } else {
292 status = ath6kl_write_reg_diag(ar, &address,
293 (u32 *) &data[count]);
294 if (status)
295 break;
296 }
297 }
298
299 return status;
300 }
301
302 /* FIXME: move to a better place, target.h? */
303 #define AR6003_RESET_CONTROL_ADDRESS 0x00004000
304 #define AR6004_RESET_CONTROL_ADDRESS 0x00004000
305
306 static void ath6kl_reset_device(struct ath6kl *ar, u32 target_type,
307 bool wait_fot_compltn, bool cold_reset)
308 {
309 int status = 0;
310 u32 address;
311 u32 data;
312
313 if (target_type != TARGET_TYPE_AR6003 &&
314 target_type != TARGET_TYPE_AR6004)
315 return;
316
317 data = cold_reset ? RESET_CONTROL_COLD_RST : RESET_CONTROL_MBOX_RST;
318
319 switch (target_type) {
320 case TARGET_TYPE_AR6003:
321 address = AR6003_RESET_CONTROL_ADDRESS;
322 break;
323 case TARGET_TYPE_AR6004:
324 address = AR6004_RESET_CONTROL_ADDRESS;
325 break;
326 default:
327 address = AR6003_RESET_CONTROL_ADDRESS;
328 break;
329 }
330
331 status = ath6kl_write_reg_diag(ar, &address, &data);
332
333 if (status)
334 ath6kl_err("failed to reset target\n");
335 }
336
337 void ath6kl_stop_endpoint(struct net_device *dev, bool keep_profile,
338 bool get_dbglogs)
339 {
340 struct ath6kl *ar = ath6kl_priv(dev);
341 static u8 bcast_mac[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
342 bool discon_issued;
343
344 netif_stop_queue(dev);
345
346 /* disable the target and the interrupts associated with it */
347 if (test_bit(WMI_READY, &ar->flag)) {
348 discon_issued = (test_bit(CONNECTED, &ar->flag) ||
349 test_bit(CONNECT_PEND, &ar->flag));
350 ath6kl_disconnect(ar);
351 if (!keep_profile)
352 ath6kl_init_profile_info(ar);
353
354 del_timer(&ar->disconnect_timer);
355
356 clear_bit(WMI_READY, &ar->flag);
357 ath6kl_wmi_shutdown(ar->wmi);
358 clear_bit(WMI_ENABLED, &ar->flag);
359 ar->wmi = NULL;
360
361 /*
362 * After wmi_shudown all WMI events will be dropped. We
363 * need to cleanup the buffers allocated in AP mode and
364 * give disconnect notification to stack, which usually
365 * happens in the disconnect_event. Simulate the disconnect
366 * event by calling the function directly. Sometimes
367 * disconnect_event will be received when the debug logs
368 * are collected.
369 */
370 if (discon_issued)
371 ath6kl_disconnect_event(ar, DISCONNECT_CMD,
372 (ar->nw_type & AP_NETWORK) ?
373 bcast_mac : ar->bssid,
374 0, NULL, 0);
375
376 ar->user_key_ctrl = 0;
377
378 } else {
379 ath6kl_dbg(ATH6KL_DBG_TRC,
380 "%s: wmi is not ready 0x%p 0x%p\n",
381 __func__, ar, ar->wmi);
382
383 /* Shut down WMI if we have started it */
384 if (test_bit(WMI_ENABLED, &ar->flag)) {
385 ath6kl_dbg(ATH6KL_DBG_TRC,
386 "%s: shut down wmi\n", __func__);
387 ath6kl_wmi_shutdown(ar->wmi);
388 clear_bit(WMI_ENABLED, &ar->flag);
389 ar->wmi = NULL;
390 }
391 }
392
393 if (ar->htc_target) {
394 ath6kl_dbg(ATH6KL_DBG_TRC, "%s: shut down htc\n", __func__);
395 ath6kl_htc_stop(ar->htc_target);
396 }
397
398 /*
399 * Try to reset the device if we can. The driver may have been
400 * configure NOT to reset the target during a debug session.
401 */
402 ath6kl_dbg(ATH6KL_DBG_TRC,
403 "attempting to reset target on instance destroy\n");
404 ath6kl_reset_device(ar, ar->target_type, true, true);
405 }
406
407 static void ath6kl_install_static_wep_keys(struct ath6kl *ar)
408 {
409 u8 index;
410 u8 keyusage;
411
412 for (index = WMI_MIN_KEY_INDEX; index <= WMI_MAX_KEY_INDEX; index++) {
413 if (ar->wep_key_list[index].key_len) {
414 keyusage = GROUP_USAGE;
415 if (index == ar->def_txkey_index)
416 keyusage |= TX_USAGE;
417
418 ath6kl_wmi_addkey_cmd(ar->wmi,
419 index,
420 WEP_CRYPT,
421 keyusage,
422 ar->wep_key_list[index].key_len,
423 NULL,
424 ar->wep_key_list[index].key,
425 KEY_OP_INIT_VAL, NULL,
426 NO_SYNC_WMIFLAG);
427 }
428 }
429 }
430
431 static void ath6kl_connect_ap_mode(struct ath6kl *ar, u16 channel, u8 *bssid,
432 u16 listen_int, u16 beacon_int,
433 u8 assoc_req_len, u8 *assoc_info)
434 {
435 struct net_device *dev = ar->net_dev;
436 u8 *ies = NULL, *wpa_ie = NULL, *pos;
437 size_t ies_len = 0;
438 struct station_info sinfo;
439 struct ath6kl_req_key *ik;
440 enum crypto_type keyType = NONE_CRYPT;
441
442 if (memcmp(dev->dev_addr, bssid, ETH_ALEN) == 0) {
443 ik = &ar->ap_mode_bkey;
444
445 switch (ar->auth_mode) {
446 case NONE_AUTH:
447 if (ar->prwise_crypto == WEP_CRYPT)
448 ath6kl_install_static_wep_keys(ar);
449 break;
450 case WPA_PSK_AUTH:
451 case WPA2_PSK_AUTH:
452 case (WPA_PSK_AUTH|WPA2_PSK_AUTH):
453 switch (ik->ik_type) {
454 case ATH6KL_CIPHER_TKIP:
455 keyType = TKIP_CRYPT;
456 break;
457 case ATH6KL_CIPHER_AES_CCM:
458 keyType = AES_CRYPT;
459 break;
460 default:
461 goto skip_key;
462 }
463 ath6kl_wmi_addkey_cmd(ar->wmi, ik->ik_keyix, keyType,
464 GROUP_USAGE, ik->ik_keylen,
465 (u8 *)&ik->ik_keyrsc,
466 ik->ik_keydata,
467 KEY_OP_INIT_VAL, ik->ik_macaddr,
468 SYNC_BOTH_WMIFLAG);
469 break;
470 }
471 skip_key:
472 set_bit(CONNECTED, &ar->flag);
473 return;
474 }
475
476 ath6kl_dbg(ATH6KL_DBG_TRC, "new station %pM aid=%d\n",
477 bssid, channel);
478
479 if (assoc_req_len > sizeof(struct ieee80211_hdr_3addr)) {
480 struct ieee80211_mgmt *mgmt =
481 (struct ieee80211_mgmt *) assoc_info;
482 if (ieee80211_is_assoc_req(mgmt->frame_control) &&
483 assoc_req_len >= sizeof(struct ieee80211_hdr_3addr) +
484 sizeof(mgmt->u.assoc_req)) {
485 ies = mgmt->u.assoc_req.variable;
486 ies_len = assoc_info + assoc_req_len - ies;
487 } else if (ieee80211_is_reassoc_req(mgmt->frame_control) &&
488 assoc_req_len >= sizeof(struct ieee80211_hdr_3addr)
489 + sizeof(mgmt->u.reassoc_req)) {
490 ies = mgmt->u.reassoc_req.variable;
491 ies_len = assoc_info + assoc_req_len - ies;
492 }
493 }
494
495 pos = ies;
496 while (pos && pos + 1 < ies + ies_len) {
497 if (pos + 2 + pos[1] > ies + ies_len)
498 break;
499 if (pos[0] == WLAN_EID_RSN)
500 wpa_ie = pos; /* RSN IE */
501 else if (pos[0] == WLAN_EID_VENDOR_SPECIFIC &&
502 pos[1] >= 4 &&
503 pos[2] == 0x00 && pos[3] == 0x50 && pos[4] == 0xf2) {
504 if (pos[5] == 0x01)
505 wpa_ie = pos; /* WPA IE */
506 else if (pos[5] == 0x04) {
507 wpa_ie = pos; /* WPS IE */
508 break; /* overrides WPA/RSN IE */
509 }
510 }
511 pos += 2 + pos[1];
512 }
513
514 ath6kl_add_new_sta(ar, bssid, channel, wpa_ie,
515 wpa_ie ? 2 + wpa_ie[1] : 0,
516 listen_int & 0xFF, beacon_int,
517 (listen_int >> 8) & 0xFF);
518
519 /* send event to application */
520 memset(&sinfo, 0, sizeof(sinfo));
521
522 /* TODO: sinfo.generation */
523
524 sinfo.assoc_req_ies = ies;
525 sinfo.assoc_req_ies_len = ies_len;
526 sinfo.filled |= STATION_INFO_ASSOC_REQ_IES;
527
528 cfg80211_new_sta(ar->net_dev, bssid, &sinfo, GFP_KERNEL);
529
530 netif_wake_queue(ar->net_dev);
531
532 return;
533 }
534
535 /* Functions for Tx credit handling */
536 void ath6k_credit_init(struct htc_credit_state_info *cred_info,
537 struct list_head *ep_list,
538 int tot_credits)
539 {
540 struct htc_endpoint_credit_dist *cur_ep_dist;
541 int count;
542
543 cred_info->cur_free_credits = tot_credits;
544 cred_info->total_avail_credits = tot_credits;
545
546 list_for_each_entry(cur_ep_dist, ep_list, list) {
547 if (cur_ep_dist->endpoint == ENDPOINT_0)
548 continue;
549
550 cur_ep_dist->cred_min = cur_ep_dist->cred_per_msg;
551
552 if (tot_credits > 4)
553 if ((cur_ep_dist->svc_id == WMI_DATA_BK_SVC) ||
554 (cur_ep_dist->svc_id == WMI_DATA_BE_SVC)) {
555 ath6kl_deposit_credit_to_ep(cred_info,
556 cur_ep_dist,
557 cur_ep_dist->cred_min);
558 cur_ep_dist->dist_flags |= HTC_EP_ACTIVE;
559 }
560
561 if (cur_ep_dist->svc_id == WMI_CONTROL_SVC) {
562 ath6kl_deposit_credit_to_ep(cred_info, cur_ep_dist,
563 cur_ep_dist->cred_min);
564 /*
565 * Control service is always marked active, it
566 * never goes inactive EVER.
567 */
568 cur_ep_dist->dist_flags |= HTC_EP_ACTIVE;
569 } else if (cur_ep_dist->svc_id == WMI_DATA_BK_SVC)
570 /* this is the lowest priority data endpoint */
571 cred_info->lowestpri_ep_dist = cur_ep_dist->list;
572
573 /*
574 * Streams have to be created (explicit | implicit) for all
575 * kinds of traffic. BE endpoints are also inactive in the
576 * beginning. When BE traffic starts it creates implicit
577 * streams that redistributes credits.
578 *
579 * Note: all other endpoints have minimums set but are
580 * initially given NO credits. credits will be distributed
581 * as traffic activity demands
582 */
583 }
584
585 WARN_ON(cred_info->cur_free_credits <= 0);
586
587 list_for_each_entry(cur_ep_dist, ep_list, list) {
588 if (cur_ep_dist->endpoint == ENDPOINT_0)
589 continue;
590
591 if (cur_ep_dist->svc_id == WMI_CONTROL_SVC)
592 cur_ep_dist->cred_norm = cur_ep_dist->cred_per_msg;
593 else {
594 /*
595 * For the remaining data endpoints, we assume that
596 * each cred_per_msg are the same. We use a simple
597 * calculation here, we take the remaining credits
598 * and determine how many max messages this can
599 * cover and then set each endpoint's normal value
600 * equal to 3/4 this amount.
601 */
602 count = (cred_info->cur_free_credits /
603 cur_ep_dist->cred_per_msg)
604 * cur_ep_dist->cred_per_msg;
605 count = (count * 3) >> 2;
606 count = max(count, cur_ep_dist->cred_per_msg);
607 cur_ep_dist->cred_norm = count;
608
609 }
610 }
611 }
612
613 /* initialize and setup credit distribution */
614 int ath6k_setup_credit_dist(void *htc_handle,
615 struct htc_credit_state_info *cred_info)
616 {
617 u16 servicepriority[5];
618
619 memset(cred_info, 0, sizeof(struct htc_credit_state_info));
620
621 servicepriority[0] = WMI_CONTROL_SVC; /* highest */
622 servicepriority[1] = WMI_DATA_VO_SVC;
623 servicepriority[2] = WMI_DATA_VI_SVC;
624 servicepriority[3] = WMI_DATA_BE_SVC;
625 servicepriority[4] = WMI_DATA_BK_SVC; /* lowest */
626
627 /* set priority list */
628 ath6kl_htc_set_credit_dist(htc_handle, cred_info, servicepriority, 5);
629
630 return 0;
631 }
632
633 /* reduce an ep's credits back to a set limit */
634 static void ath6k_reduce_credits(struct htc_credit_state_info *cred_info,
635 struct htc_endpoint_credit_dist *ep_dist,
636 int limit)
637 {
638 int credits;
639
640 ep_dist->cred_assngd = limit;
641
642 if (ep_dist->credits <= limit)
643 return;
644
645 credits = ep_dist->credits - limit;
646 ep_dist->credits -= credits;
647 cred_info->cur_free_credits += credits;
648 }
649
650 static void ath6k_credit_update(struct htc_credit_state_info *cred_info,
651 struct list_head *epdist_list)
652 {
653 struct htc_endpoint_credit_dist *cur_dist_list;
654
655 list_for_each_entry(cur_dist_list, epdist_list, list) {
656 if (cur_dist_list->endpoint == ENDPOINT_0)
657 continue;
658
659 if (cur_dist_list->cred_to_dist > 0) {
660 cur_dist_list->credits +=
661 cur_dist_list->cred_to_dist;
662 cur_dist_list->cred_to_dist = 0;
663 if (cur_dist_list->credits >
664 cur_dist_list->cred_assngd)
665 ath6k_reduce_credits(cred_info,
666 cur_dist_list,
667 cur_dist_list->cred_assngd);
668
669 if (cur_dist_list->credits >
670 cur_dist_list->cred_norm)
671 ath6k_reduce_credits(cred_info, cur_dist_list,
672 cur_dist_list->cred_norm);
673
674 if (!(cur_dist_list->dist_flags & HTC_EP_ACTIVE)) {
675 if (cur_dist_list->txq_depth == 0)
676 ath6k_reduce_credits(cred_info,
677 cur_dist_list, 0);
678 }
679 }
680 }
681 }
682
683 /*
684 * HTC has an endpoint that needs credits, ep_dist is the endpoint in
685 * question.
686 */
687 void ath6k_seek_credits(struct htc_credit_state_info *cred_info,
688 struct htc_endpoint_credit_dist *ep_dist)
689 {
690 struct htc_endpoint_credit_dist *curdist_list;
691 int credits = 0;
692 int need;
693
694 if (ep_dist->svc_id == WMI_CONTROL_SVC)
695 goto out;
696
697 if ((ep_dist->svc_id == WMI_DATA_VI_SVC) ||
698 (ep_dist->svc_id == WMI_DATA_VO_SVC))
699 if ((ep_dist->cred_assngd >= ep_dist->cred_norm))
700 goto out;
701
702 /*
703 * For all other services, we follow a simple algorithm of:
704 *
705 * 1. checking the free pool for credits
706 * 2. checking lower priority endpoints for credits to take
707 */
708
709 credits = min(cred_info->cur_free_credits, ep_dist->seek_cred);
710
711 if (credits >= ep_dist->seek_cred)
712 goto out;
713
714 /*
715 * We don't have enough in the free pool, try taking away from
716 * lower priority services The rule for taking away credits:
717 *
718 * 1. Only take from lower priority endpoints
719 * 2. Only take what is allocated above the minimum (never
720 * starve an endpoint completely)
721 * 3. Only take what you need.
722 */
723
724 list_for_each_entry_reverse(curdist_list,
725 &cred_info->lowestpri_ep_dist,
726 list) {
727 if (curdist_list == ep_dist)
728 break;
729
730 need = ep_dist->seek_cred - cred_info->cur_free_credits;
731
732 if ((curdist_list->cred_assngd - need) >=
733 curdist_list->cred_min) {
734 /*
735 * The current one has been allocated more than
736 * it's minimum and it has enough credits assigned
737 * above it's minimum to fulfill our need try to
738 * take away just enough to fulfill our need.
739 */
740 ath6k_reduce_credits(cred_info, curdist_list,
741 curdist_list->cred_assngd - need);
742
743 if (cred_info->cur_free_credits >=
744 ep_dist->seek_cred)
745 break;
746 }
747
748 if (curdist_list->endpoint == ENDPOINT_0)
749 break;
750 }
751
752 credits = min(cred_info->cur_free_credits, ep_dist->seek_cred);
753
754 out:
755 /* did we find some credits? */
756 if (credits)
757 ath6kl_deposit_credit_to_ep(cred_info, ep_dist, credits);
758
759 ep_dist->seek_cred = 0;
760 }
761
762 /* redistribute credits based on activity change */
763 static void ath6k_redistribute_credits(struct htc_credit_state_info *info,
764 struct list_head *ep_dist_list)
765 {
766 struct htc_endpoint_credit_dist *curdist_list;
767
768 list_for_each_entry(curdist_list, ep_dist_list, list) {
769 if (curdist_list->endpoint == ENDPOINT_0)
770 continue;
771
772 if ((curdist_list->svc_id == WMI_DATA_BK_SVC) ||
773 (curdist_list->svc_id == WMI_DATA_BE_SVC))
774 curdist_list->dist_flags |= HTC_EP_ACTIVE;
775
776 if ((curdist_list->svc_id != WMI_CONTROL_SVC) &&
777 !(curdist_list->dist_flags & HTC_EP_ACTIVE)) {
778 if (curdist_list->txq_depth == 0)
779 ath6k_reduce_credits(info,
780 curdist_list, 0);
781 else
782 ath6k_reduce_credits(info,
783 curdist_list,
784 curdist_list->cred_min);
785 }
786 }
787 }
788
789 /*
790 *
791 * This function is invoked whenever endpoints require credit
792 * distributions. A lock is held while this function is invoked, this
793 * function shall NOT block. The ep_dist_list is a list of distribution
794 * structures in prioritized order as defined by the call to the
795 * htc_set_credit_dist() api.
796 */
797 void ath6k_credit_distribute(struct htc_credit_state_info *cred_info,
798 struct list_head *ep_dist_list,
799 enum htc_credit_dist_reason reason)
800 {
801 switch (reason) {
802 case HTC_CREDIT_DIST_SEND_COMPLETE:
803 ath6k_credit_update(cred_info, ep_dist_list);
804 break;
805 case HTC_CREDIT_DIST_ACTIVITY_CHANGE:
806 ath6k_redistribute_credits(cred_info, ep_dist_list);
807 break;
808 default:
809 break;
810 }
811
812 WARN_ON(cred_info->cur_free_credits > cred_info->total_avail_credits);
813 WARN_ON(cred_info->cur_free_credits < 0);
814 }
815
816 void disconnect_timer_handler(unsigned long ptr)
817 {
818 struct net_device *dev = (struct net_device *)ptr;
819 struct ath6kl *ar = ath6kl_priv(dev);
820
821 ath6kl_init_profile_info(ar);
822 ath6kl_disconnect(ar);
823 }
824
825 void ath6kl_disconnect(struct ath6kl *ar)
826 {
827 if (test_bit(CONNECTED, &ar->flag) ||
828 test_bit(CONNECT_PEND, &ar->flag)) {
829 ath6kl_wmi_disconnect_cmd(ar->wmi);
830 /*
831 * Disconnect command is issued, clear the connect pending
832 * flag. The connected flag will be cleared in
833 * disconnect event notification.
834 */
835 clear_bit(CONNECT_PEND, &ar->flag);
836 }
837 }
838
839 void ath6kl_deep_sleep_enable(struct ath6kl *ar)
840 {
841 switch (ar->sme_state) {
842 case SME_CONNECTING:
843 cfg80211_connect_result(ar->net_dev, ar->bssid, NULL, 0,
844 NULL, 0,
845 WLAN_STATUS_UNSPECIFIED_FAILURE,
846 GFP_KERNEL);
847 break;
848 case SME_CONNECTED:
849 default:
850 /*
851 * FIXME: oddly enough smeState is in DISCONNECTED during
852 * suspend, why? Need to send disconnected event in that
853 * state.
854 */
855 cfg80211_disconnected(ar->net_dev, 0, NULL, 0, GFP_KERNEL);
856 break;
857 }
858
859 if (test_bit(CONNECTED, &ar->flag) ||
860 test_bit(CONNECT_PEND, &ar->flag))
861 ath6kl_wmi_disconnect_cmd(ar->wmi);
862
863 ar->sme_state = SME_DISCONNECTED;
864
865 /* disable scanning */
866 if (ath6kl_wmi_scanparams_cmd(ar->wmi, 0xFFFF, 0, 0, 0, 0, 0, 0, 0,
867 0, 0) != 0)
868 printk(KERN_WARNING "ath6kl: failed to disable scan "
869 "during suspend\n");
870
871 ath6kl_cfg80211_scan_complete_event(ar, -ECANCELED);
872 }
873
874 /* WMI Event handlers */
875
876 static const char *get_hw_id_string(u32 id)
877 {
878 switch (id) {
879 case AR6003_REV1_VERSION:
880 return "1.0";
881 case AR6003_REV2_VERSION:
882 return "2.0";
883 case AR6003_REV3_VERSION:
884 return "2.1.1";
885 default:
886 return "unknown";
887 }
888 }
889
890 void ath6kl_ready_event(void *devt, u8 *datap, u32 sw_ver, u32 abi_ver)
891 {
892 struct ath6kl *ar = devt;
893 struct net_device *dev = ar->net_dev;
894
895 memcpy(dev->dev_addr, datap, ETH_ALEN);
896 ath6kl_dbg(ATH6KL_DBG_TRC, "%s: mac addr = %pM\n",
897 __func__, dev->dev_addr);
898
899 ar->version.wlan_ver = sw_ver;
900 ar->version.abi_ver = abi_ver;
901
902 snprintf(ar->wdev->wiphy->fw_version,
903 sizeof(ar->wdev->wiphy->fw_version),
904 "%u.%u.%u.%u",
905 (ar->version.wlan_ver & 0xf0000000) >> 28,
906 (ar->version.wlan_ver & 0x0f000000) >> 24,
907 (ar->version.wlan_ver & 0x00ff0000) >> 16,
908 (ar->version.wlan_ver & 0x0000ffff));
909
910 /* indicate to the waiting thread that the ready event was received */
911 set_bit(WMI_READY, &ar->flag);
912 wake_up(&ar->event_wq);
913
914 ath6kl_info("hw %s fw %s\n",
915 get_hw_id_string(ar->wdev->wiphy->hw_version),
916 ar->wdev->wiphy->fw_version);
917 }
918
919 void ath6kl_scan_complete_evt(struct ath6kl *ar, int status)
920 {
921 ath6kl_cfg80211_scan_complete_event(ar, status);
922
923 if (!ar->usr_bss_filter)
924 ath6kl_wmi_bssfilter_cmd(ar->wmi, NONE_BSS_FILTER, 0);
925
926 ath6kl_dbg(ATH6KL_DBG_WLAN_SCAN, "scan complete: %d\n", status);
927 }
928
929 void ath6kl_connect_event(struct ath6kl *ar, u16 channel, u8 *bssid,
930 u16 listen_int, u16 beacon_int,
931 enum network_type net_type, u8 beacon_ie_len,
932 u8 assoc_req_len, u8 assoc_resp_len,
933 u8 *assoc_info)
934 {
935 unsigned long flags;
936
937 if (ar->nw_type == AP_NETWORK) {
938 ath6kl_connect_ap_mode(ar, channel, bssid, listen_int,
939 beacon_int, assoc_req_len,
940 assoc_info + beacon_ie_len);
941 return;
942 }
943
944 ath6kl_cfg80211_connect_event(ar, channel, bssid,
945 listen_int, beacon_int,
946 net_type, beacon_ie_len,
947 assoc_req_len, assoc_resp_len,
948 assoc_info);
949
950 memcpy(ar->bssid, bssid, sizeof(ar->bssid));
951 ar->bss_ch = channel;
952
953 if ((ar->nw_type == INFRA_NETWORK))
954 ath6kl_wmi_listeninterval_cmd(ar->wmi, ar->listen_intvl_t,
955 ar->listen_intvl_b);
956
957 netif_wake_queue(ar->net_dev);
958
959 /* Update connect & link status atomically */
960 spin_lock_irqsave(&ar->lock, flags);
961 set_bit(CONNECTED, &ar->flag);
962 clear_bit(CONNECT_PEND, &ar->flag);
963 netif_carrier_on(ar->net_dev);
964 spin_unlock_irqrestore(&ar->lock, flags);
965
966 aggr_reset_state(ar->aggr_cntxt);
967 ar->reconnect_flag = 0;
968
969 if ((ar->nw_type == ADHOC_NETWORK) && ar->ibss_ps_enable) {
970 memset(ar->node_map, 0, sizeof(ar->node_map));
971 ar->node_num = 0;
972 ar->next_ep_id = ENDPOINT_2;
973 }
974
975 if (!ar->usr_bss_filter)
976 ath6kl_wmi_bssfilter_cmd(ar->wmi, NONE_BSS_FILTER, 0);
977 }
978
979 void ath6kl_tkip_micerr_event(struct ath6kl *ar, u8 keyid, bool ismcast)
980 {
981 struct ath6kl_sta *sta;
982 u8 tsc[6];
983 /*
984 * For AP case, keyid will have aid of STA which sent pkt with
985 * MIC error. Use this aid to get MAC & send it to hostapd.
986 */
987 if (ar->nw_type == AP_NETWORK) {
988 sta = ath6kl_find_sta_by_aid(ar, (keyid >> 2));
989 if (!sta)
990 return;
991
992 ath6kl_dbg(ATH6KL_DBG_TRC,
993 "ap tkip mic error received from aid=%d\n", keyid);
994
995 memset(tsc, 0, sizeof(tsc)); /* FIX: get correct TSC */
996 cfg80211_michael_mic_failure(ar->net_dev, sta->mac,
997 NL80211_KEYTYPE_PAIRWISE, keyid,
998 tsc, GFP_KERNEL);
999 } else
1000 ath6kl_cfg80211_tkip_micerr_event(ar, keyid, ismcast);
1001
1002 }
1003
1004 static void ath6kl_update_target_stats(struct ath6kl *ar, u8 *ptr, u32 len)
1005 {
1006 struct wmi_target_stats *tgt_stats =
1007 (struct wmi_target_stats *) ptr;
1008 struct target_stats *stats = &ar->target_stats;
1009 struct tkip_ccmp_stats *ccmp_stats;
1010 struct bss *conn_bss = NULL;
1011 struct cserv_stats *c_stats;
1012 u8 ac;
1013
1014 if (len < sizeof(*tgt_stats))
1015 return;
1016
1017 /* update the RSSI of the connected bss */
1018 if (test_bit(CONNECTED, &ar->flag)) {
1019 conn_bss = ath6kl_wmi_find_node(ar->wmi, ar->bssid);
1020 if (conn_bss) {
1021 c_stats = &tgt_stats->cserv_stats;
1022 conn_bss->ni_rssi =
1023 a_sle16_to_cpu(c_stats->cs_ave_beacon_rssi);
1024 conn_bss->ni_snr =
1025 tgt_stats->cserv_stats.cs_ave_beacon_snr;
1026 ath6kl_wmi_node_return(ar->wmi, conn_bss);
1027 }
1028 }
1029
1030 ath6kl_dbg(ATH6KL_DBG_TRC, "updating target stats\n");
1031
1032 stats->tx_pkt += le32_to_cpu(tgt_stats->stats.tx.pkt);
1033 stats->tx_byte += le32_to_cpu(tgt_stats->stats.tx.byte);
1034 stats->tx_ucast_pkt += le32_to_cpu(tgt_stats->stats.tx.ucast_pkt);
1035 stats->tx_ucast_byte += le32_to_cpu(tgt_stats->stats.tx.ucast_byte);
1036 stats->tx_mcast_pkt += le32_to_cpu(tgt_stats->stats.tx.mcast_pkt);
1037 stats->tx_mcast_byte += le32_to_cpu(tgt_stats->stats.tx.mcast_byte);
1038 stats->tx_bcast_pkt += le32_to_cpu(tgt_stats->stats.tx.bcast_pkt);
1039 stats->tx_bcast_byte += le32_to_cpu(tgt_stats->stats.tx.bcast_byte);
1040 stats->tx_rts_success_cnt +=
1041 le32_to_cpu(tgt_stats->stats.tx.rts_success_cnt);
1042
1043 for (ac = 0; ac < WMM_NUM_AC; ac++)
1044 stats->tx_pkt_per_ac[ac] +=
1045 le32_to_cpu(tgt_stats->stats.tx.pkt_per_ac[ac]);
1046
1047 stats->tx_err += le32_to_cpu(tgt_stats->stats.tx.err);
1048 stats->tx_fail_cnt += le32_to_cpu(tgt_stats->stats.tx.fail_cnt);
1049 stats->tx_retry_cnt += le32_to_cpu(tgt_stats->stats.tx.retry_cnt);
1050 stats->tx_mult_retry_cnt +=
1051 le32_to_cpu(tgt_stats->stats.tx.mult_retry_cnt);
1052 stats->tx_rts_fail_cnt +=
1053 le32_to_cpu(tgt_stats->stats.tx.rts_fail_cnt);
1054 stats->tx_ucast_rate =
1055 ath6kl_wmi_get_rate(a_sle32_to_cpu(tgt_stats->stats.tx.ucast_rate));
1056
1057 stats->rx_pkt += le32_to_cpu(tgt_stats->stats.rx.pkt);
1058 stats->rx_byte += le32_to_cpu(tgt_stats->stats.rx.byte);
1059 stats->rx_ucast_pkt += le32_to_cpu(tgt_stats->stats.rx.ucast_pkt);
1060 stats->rx_ucast_byte += le32_to_cpu(tgt_stats->stats.rx.ucast_byte);
1061 stats->rx_mcast_pkt += le32_to_cpu(tgt_stats->stats.rx.mcast_pkt);
1062 stats->rx_mcast_byte += le32_to_cpu(tgt_stats->stats.rx.mcast_byte);
1063 stats->rx_bcast_pkt += le32_to_cpu(tgt_stats->stats.rx.bcast_pkt);
1064 stats->rx_bcast_byte += le32_to_cpu(tgt_stats->stats.rx.bcast_byte);
1065 stats->rx_frgment_pkt += le32_to_cpu(tgt_stats->stats.rx.frgment_pkt);
1066 stats->rx_err += le32_to_cpu(tgt_stats->stats.rx.err);
1067 stats->rx_crc_err += le32_to_cpu(tgt_stats->stats.rx.crc_err);
1068 stats->rx_key_cache_miss +=
1069 le32_to_cpu(tgt_stats->stats.rx.key_cache_miss);
1070 stats->rx_decrypt_err += le32_to_cpu(tgt_stats->stats.rx.decrypt_err);
1071 stats->rx_dupl_frame += le32_to_cpu(tgt_stats->stats.rx.dupl_frame);
1072 stats->rx_ucast_rate =
1073 ath6kl_wmi_get_rate(a_sle32_to_cpu(tgt_stats->stats.rx.ucast_rate));
1074
1075 ccmp_stats = &tgt_stats->stats.tkip_ccmp_stats;
1076
1077 stats->tkip_local_mic_fail +=
1078 le32_to_cpu(ccmp_stats->tkip_local_mic_fail);
1079 stats->tkip_cnter_measures_invoked +=
1080 le32_to_cpu(ccmp_stats->tkip_cnter_measures_invoked);
1081 stats->tkip_fmt_err += le32_to_cpu(ccmp_stats->tkip_fmt_err);
1082
1083 stats->ccmp_fmt_err += le32_to_cpu(ccmp_stats->ccmp_fmt_err);
1084 stats->ccmp_replays += le32_to_cpu(ccmp_stats->ccmp_replays);
1085
1086 stats->pwr_save_fail_cnt +=
1087 le32_to_cpu(tgt_stats->pm_stats.pwr_save_failure_cnt);
1088 stats->noise_floor_calib =
1089 a_sle32_to_cpu(tgt_stats->noise_floor_calib);
1090
1091 stats->cs_bmiss_cnt +=
1092 le32_to_cpu(tgt_stats->cserv_stats.cs_bmiss_cnt);
1093 stats->cs_low_rssi_cnt +=
1094 le32_to_cpu(tgt_stats->cserv_stats.cs_low_rssi_cnt);
1095 stats->cs_connect_cnt +=
1096 le16_to_cpu(tgt_stats->cserv_stats.cs_connect_cnt);
1097 stats->cs_discon_cnt +=
1098 le16_to_cpu(tgt_stats->cserv_stats.cs_discon_cnt);
1099
1100 stats->cs_ave_beacon_rssi =
1101 a_sle16_to_cpu(tgt_stats->cserv_stats.cs_ave_beacon_rssi);
1102
1103 stats->cs_last_roam_msec =
1104 tgt_stats->cserv_stats.cs_last_roam_msec;
1105 stats->cs_snr = tgt_stats->cserv_stats.cs_snr;
1106 stats->cs_rssi = a_sle16_to_cpu(tgt_stats->cserv_stats.cs_rssi);
1107
1108 stats->lq_val = le32_to_cpu(tgt_stats->lq_val);
1109
1110 stats->wow_pkt_dropped +=
1111 le32_to_cpu(tgt_stats->wow_stats.wow_pkt_dropped);
1112 stats->wow_host_pkt_wakeups +=
1113 tgt_stats->wow_stats.wow_host_pkt_wakeups;
1114 stats->wow_host_evt_wakeups +=
1115 tgt_stats->wow_stats.wow_host_evt_wakeups;
1116 stats->wow_evt_discarded +=
1117 le16_to_cpu(tgt_stats->wow_stats.wow_evt_discarded);
1118
1119 if (test_bit(STATS_UPDATE_PEND, &ar->flag)) {
1120 clear_bit(STATS_UPDATE_PEND, &ar->flag);
1121 wake_up(&ar->event_wq);
1122 }
1123 }
1124
1125 static void ath6kl_add_le32(__le32 *var, __le32 val)
1126 {
1127 *var = cpu_to_le32(le32_to_cpu(*var) + le32_to_cpu(val));
1128 }
1129
1130 void ath6kl_tgt_stats_event(struct ath6kl *ar, u8 *ptr, u32 len)
1131 {
1132 struct wmi_ap_mode_stat *p = (struct wmi_ap_mode_stat *) ptr;
1133 struct wmi_ap_mode_stat *ap = &ar->ap_stats;
1134 struct wmi_per_sta_stat *st_ap, *st_p;
1135 u8 ac;
1136
1137 if (ar->nw_type == AP_NETWORK) {
1138 if (len < sizeof(*p))
1139 return;
1140
1141 for (ac = 0; ac < AP_MAX_NUM_STA; ac++) {
1142 st_ap = &ap->sta[ac];
1143 st_p = &p->sta[ac];
1144
1145 ath6kl_add_le32(&st_ap->tx_bytes, st_p->tx_bytes);
1146 ath6kl_add_le32(&st_ap->tx_pkts, st_p->tx_pkts);
1147 ath6kl_add_le32(&st_ap->tx_error, st_p->tx_error);
1148 ath6kl_add_le32(&st_ap->tx_discard, st_p->tx_discard);
1149 ath6kl_add_le32(&st_ap->rx_bytes, st_p->rx_bytes);
1150 ath6kl_add_le32(&st_ap->rx_pkts, st_p->rx_pkts);
1151 ath6kl_add_le32(&st_ap->rx_error, st_p->rx_error);
1152 ath6kl_add_le32(&st_ap->rx_discard, st_p->rx_discard);
1153 }
1154
1155 } else {
1156 ath6kl_update_target_stats(ar, ptr, len);
1157 }
1158 }
1159
1160 void ath6kl_wakeup_event(void *dev)
1161 {
1162 struct ath6kl *ar = (struct ath6kl *) dev;
1163
1164 wake_up(&ar->event_wq);
1165 }
1166
1167 void ath6kl_txpwr_rx_evt(void *devt, u8 tx_pwr)
1168 {
1169 struct ath6kl *ar = (struct ath6kl *) devt;
1170
1171 ar->tx_pwr = tx_pwr;
1172 wake_up(&ar->event_wq);
1173 }
1174
1175 void ath6kl_pspoll_event(struct ath6kl *ar, u8 aid)
1176 {
1177 struct ath6kl_sta *conn;
1178 struct sk_buff *skb;
1179 bool psq_empty = false;
1180
1181 conn = ath6kl_find_sta_by_aid(ar, aid);
1182
1183 if (!conn)
1184 return;
1185 /*
1186 * Send out a packet queued on ps queue. When the ps queue
1187 * becomes empty update the PVB for this station.
1188 */
1189 spin_lock_bh(&conn->psq_lock);
1190 psq_empty = skb_queue_empty(&conn->psq);
1191 spin_unlock_bh(&conn->psq_lock);
1192
1193 if (psq_empty)
1194 /* TODO: Send out a NULL data frame */
1195 return;
1196
1197 spin_lock_bh(&conn->psq_lock);
1198 skb = skb_dequeue(&conn->psq);
1199 spin_unlock_bh(&conn->psq_lock);
1200
1201 conn->sta_flags |= STA_PS_POLLED;
1202 ath6kl_data_tx(skb, ar->net_dev);
1203 conn->sta_flags &= ~STA_PS_POLLED;
1204
1205 spin_lock_bh(&conn->psq_lock);
1206 psq_empty = skb_queue_empty(&conn->psq);
1207 spin_unlock_bh(&conn->psq_lock);
1208
1209 if (psq_empty)
1210 ath6kl_wmi_set_pvb_cmd(ar->wmi, conn->aid, 0);
1211 }
1212
1213 void ath6kl_dtimexpiry_event(struct ath6kl *ar)
1214 {
1215 bool mcastq_empty = false;
1216 struct sk_buff *skb;
1217
1218 /*
1219 * If there are no associated STAs, ignore the DTIM expiry event.
1220 * There can be potential race conditions where the last associated
1221 * STA may disconnect & before the host could clear the 'Indicate
1222 * DTIM' request to the firmware, the firmware would have just
1223 * indicated a DTIM expiry event. The race is between 'clear DTIM
1224 * expiry cmd' going from the host to the firmware & the DTIM
1225 * expiry event happening from the firmware to the host.
1226 */
1227 if (!ar->sta_list_index)
1228 return;
1229
1230 spin_lock_bh(&ar->mcastpsq_lock);
1231 mcastq_empty = skb_queue_empty(&ar->mcastpsq);
1232 spin_unlock_bh(&ar->mcastpsq_lock);
1233
1234 if (mcastq_empty)
1235 return;
1236
1237 /* set the STA flag to dtim_expired for the frame to go out */
1238 set_bit(DTIM_EXPIRED, &ar->flag);
1239
1240 spin_lock_bh(&ar->mcastpsq_lock);
1241 while ((skb = skb_dequeue(&ar->mcastpsq)) != NULL) {
1242 spin_unlock_bh(&ar->mcastpsq_lock);
1243
1244 ath6kl_data_tx(skb, ar->net_dev);
1245
1246 spin_lock_bh(&ar->mcastpsq_lock);
1247 }
1248 spin_unlock_bh(&ar->mcastpsq_lock);
1249
1250 clear_bit(DTIM_EXPIRED, &ar->flag);
1251
1252 /* clear the LSB of the BitMapCtl field of the TIM IE */
1253 ath6kl_wmi_set_pvb_cmd(ar->wmi, MCAST_AID, 0);
1254 }
1255
1256 void ath6kl_disconnect_event(struct ath6kl *ar, u8 reason, u8 *bssid,
1257 u8 assoc_resp_len, u8 *assoc_info,
1258 u16 prot_reason_status)
1259 {
1260 struct bss *wmi_ssid_node = NULL;
1261 unsigned long flags;
1262
1263 if (ar->nw_type == AP_NETWORK) {
1264 if (!ath6kl_remove_sta(ar, bssid, prot_reason_status))
1265 return;
1266
1267 /* if no more associated STAs, empty the mcast PS q */
1268 if (ar->sta_list_index == 0) {
1269 spin_lock_bh(&ar->mcastpsq_lock);
1270 skb_queue_purge(&ar->mcastpsq);
1271 spin_unlock_bh(&ar->mcastpsq_lock);
1272
1273 /* clear the LSB of the TIM IE's BitMapCtl field */
1274 if (test_bit(WMI_READY, &ar->flag))
1275 ath6kl_wmi_set_pvb_cmd(ar->wmi, MCAST_AID, 0);
1276 }
1277
1278 if (!is_broadcast_ether_addr(bssid)) {
1279 /* send event to application */
1280 cfg80211_del_sta(ar->net_dev, bssid, GFP_KERNEL);
1281 }
1282
1283 clear_bit(CONNECTED, &ar->flag);
1284 return;
1285 }
1286
1287 ath6kl_cfg80211_disconnect_event(ar, reason, bssid,
1288 assoc_resp_len, assoc_info,
1289 prot_reason_status);
1290
1291 aggr_reset_state(ar->aggr_cntxt);
1292
1293 del_timer(&ar->disconnect_timer);
1294
1295 ath6kl_dbg(ATH6KL_DBG_WLAN_CONNECT,
1296 "disconnect reason is %d\n", reason);
1297
1298 /*
1299 * If the event is due to disconnect cmd from the host, only they
1300 * the target would stop trying to connect. Under any other
1301 * condition, target would keep trying to connect.
1302 */
1303 if (reason == DISCONNECT_CMD) {
1304 if (!ar->usr_bss_filter && test_bit(WMI_READY, &ar->flag))
1305 ath6kl_wmi_bssfilter_cmd(ar->wmi, NONE_BSS_FILTER, 0);
1306 } else {
1307 set_bit(CONNECT_PEND, &ar->flag);
1308 if (((reason == ASSOC_FAILED) &&
1309 (prot_reason_status == 0x11)) ||
1310 ((reason == ASSOC_FAILED) && (prot_reason_status == 0x0)
1311 && (ar->reconnect_flag == 1))) {
1312 set_bit(CONNECTED, &ar->flag);
1313 return;
1314 }
1315 }
1316
1317 if ((reason == NO_NETWORK_AVAIL) && test_bit(WMI_READY, &ar->flag)) {
1318 ath6kl_wmi_node_free(ar->wmi, bssid);
1319
1320 /*
1321 * In case any other same SSID nodes are present remove it,
1322 * since those nodes also not available now.
1323 */
1324 do {
1325 /*
1326 * Find the nodes based on SSID and remove it
1327 *
1328 * Note: This case will not work out for
1329 * Hidden-SSID
1330 */
1331 wmi_ssid_node = ath6kl_wmi_find_ssid_node(ar->wmi,
1332 ar->ssid,
1333 ar->ssid_len,
1334 false,
1335 true);
1336
1337 if (wmi_ssid_node)
1338 ath6kl_wmi_node_free(ar->wmi,
1339 wmi_ssid_node->ni_macaddr);
1340
1341 } while (wmi_ssid_node);
1342 }
1343
1344 /* update connect & link status atomically */
1345 spin_lock_irqsave(&ar->lock, flags);
1346 clear_bit(CONNECTED, &ar->flag);
1347 netif_carrier_off(ar->net_dev);
1348 spin_unlock_irqrestore(&ar->lock, flags);
1349
1350 if ((reason != CSERV_DISCONNECT) || (ar->reconnect_flag != 1))
1351 ar->reconnect_flag = 0;
1352
1353 if (reason != CSERV_DISCONNECT)
1354 ar->user_key_ctrl = 0;
1355
1356 netif_stop_queue(ar->net_dev);
1357 memset(ar->bssid, 0, sizeof(ar->bssid));
1358 ar->bss_ch = 0;
1359
1360 ath6kl_tx_data_cleanup(ar);
1361 }
1362
1363 static int ath6kl_open(struct net_device *dev)
1364 {
1365 struct ath6kl *ar = ath6kl_priv(dev);
1366 unsigned long flags;
1367
1368 spin_lock_irqsave(&ar->lock, flags);
1369
1370 set_bit(WLAN_ENABLED, &ar->flag);
1371
1372 if (test_bit(CONNECTED, &ar->flag)) {
1373 netif_carrier_on(dev);
1374 netif_wake_queue(dev);
1375 } else
1376 netif_carrier_off(dev);
1377
1378 spin_unlock_irqrestore(&ar->lock, flags);
1379
1380 return 0;
1381 }
1382
1383 static int ath6kl_close(struct net_device *dev)
1384 {
1385 struct ath6kl *ar = ath6kl_priv(dev);
1386
1387 netif_stop_queue(dev);
1388
1389 ath6kl_disconnect(ar);
1390
1391 if (test_bit(WMI_READY, &ar->flag)) {
1392 if (ath6kl_wmi_scanparams_cmd(ar->wmi, 0xFFFF, 0, 0, 0, 0, 0, 0,
1393 0, 0, 0))
1394 return -EIO;
1395
1396 clear_bit(WLAN_ENABLED, &ar->flag);
1397 }
1398
1399 ath6kl_cfg80211_scan_complete_event(ar, -ECANCELED);
1400
1401 return 0;
1402 }
1403
1404 static struct net_device_stats *ath6kl_get_stats(struct net_device *dev)
1405 {
1406 struct ath6kl *ar = ath6kl_priv(dev);
1407
1408 return &ar->net_stats;
1409 }
1410
1411 static struct net_device_ops ath6kl_netdev_ops = {
1412 .ndo_open = ath6kl_open,
1413 .ndo_stop = ath6kl_close,
1414 .ndo_start_xmit = ath6kl_data_tx,
1415 .ndo_get_stats = ath6kl_get_stats,
1416 };
1417
1418 void init_netdev(struct net_device *dev)
1419 {
1420 dev->netdev_ops = &ath6kl_netdev_ops;
1421 dev->watchdog_timeo = ATH6KL_TX_TIMEOUT;
1422
1423 dev->needed_headroom = ETH_HLEN;
1424 dev->needed_headroom += sizeof(struct ath6kl_llc_snap_hdr) +
1425 sizeof(struct wmi_data_hdr) + HTC_HDR_LENGTH
1426 + WMI_MAX_TX_META_SZ + ATH6KL_HTC_ALIGN_BYTES;
1427
1428 return;
1429 }
Linux kernel - Deliverables
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