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ath6kl: Store hw mac address in struct ath6kl
[linux-2.6.git] / drivers / net / wireless / ath / ath6kl / main.c
blob6bf94025221a42c506b31044595723e73a02f6be
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_vif *vif, u8 *node_addr)
24 {
25 struct ath6kl *ar = vif->ar;
26 struct ath6kl_sta *conn = NULL;
27 u8 i, max_conn;
28
29 max_conn = (vif->nw_type == AP_NETWORK) ? AP_MAX_NUM_STA : 0;
30
31 for (i = 0; i < max_conn; i++) {
32 if (memcmp(node_addr, ar->sta_list[i].mac, ETH_ALEN) == 0) {
33 conn = &ar->sta_list[i];
34 break;
35 }
36 }
37
38 return conn;
39 }
40
41 struct ath6kl_sta *ath6kl_find_sta_by_aid(struct ath6kl *ar, u8 aid)
42 {
43 struct ath6kl_sta *conn = NULL;
44 u8 ctr;
45
46 for (ctr = 0; ctr < AP_MAX_NUM_STA; ctr++) {
47 if (ar->sta_list[ctr].aid == aid) {
48 conn = &ar->sta_list[ctr];
49 break;
50 }
51 }
52 return conn;
53 }
54
55 static void ath6kl_add_new_sta(struct ath6kl *ar, u8 *mac, u16 aid, u8 *wpaie,
56 u8 ielen, u8 keymgmt, u8 ucipher, u8 auth)
57 {
58 struct ath6kl_sta *sta;
59 u8 free_slot;
60
61 free_slot = aid - 1;
62
63 sta = &ar->sta_list[free_slot];
64 memcpy(sta->mac, mac, ETH_ALEN);
65 if (ielen <= ATH6KL_MAX_IE)
66 memcpy(sta->wpa_ie, wpaie, ielen);
67 sta->aid = aid;
68 sta->keymgmt = keymgmt;
69 sta->ucipher = ucipher;
70 sta->auth = auth;
71
72 ar->sta_list_index = ar->sta_list_index | (1 << free_slot);
73 ar->ap_stats.sta[free_slot].aid = cpu_to_le32(aid);
74 }
75
76 static void ath6kl_sta_cleanup(struct ath6kl *ar, u8 i)
77 {
78 struct ath6kl_sta *sta = &ar->sta_list[i];
79
80 /* empty the queued pkts in the PS queue if any */
81 spin_lock_bh(&sta->psq_lock);
82 skb_queue_purge(&sta->psq);
83 spin_unlock_bh(&sta->psq_lock);
84
85 memset(&ar->ap_stats.sta[sta->aid - 1], 0,
86 sizeof(struct wmi_per_sta_stat));
87 memset(sta->mac, 0, ETH_ALEN);
88 memset(sta->wpa_ie, 0, ATH6KL_MAX_IE);
89 sta->aid = 0;
90 sta->sta_flags = 0;
91
92 ar->sta_list_index = ar->sta_list_index & ~(1 << i);
93
94 }
95
96 static u8 ath6kl_remove_sta(struct ath6kl *ar, u8 *mac, u16 reason)
97 {
98 u8 i, removed = 0;
99
100 if (is_zero_ether_addr(mac))
101 return removed;
102
103 if (is_broadcast_ether_addr(mac)) {
104 ath6kl_dbg(ATH6KL_DBG_TRC, "deleting all station\n");
105
106 for (i = 0; i < AP_MAX_NUM_STA; i++) {
107 if (!is_zero_ether_addr(ar->sta_list[i].mac)) {
108 ath6kl_sta_cleanup(ar, i);
109 removed = 1;
110 }
111 }
112 } else {
113 for (i = 0; i < AP_MAX_NUM_STA; i++) {
114 if (memcmp(ar->sta_list[i].mac, mac, ETH_ALEN) == 0) {
115 ath6kl_dbg(ATH6KL_DBG_TRC,
116 "deleting station %pM aid=%d reason=%d\n",
117 mac, ar->sta_list[i].aid, reason);
118 ath6kl_sta_cleanup(ar, i);
119 removed = 1;
120 break;
121 }
122 }
123 }
124
125 return removed;
126 }
127
128 enum htc_endpoint_id ath6kl_ac2_endpoint_id(void *devt, u8 ac)
129 {
130 struct ath6kl *ar = devt;
131 return ar->ac2ep_map[ac];
132 }
133
134 struct ath6kl_cookie *ath6kl_alloc_cookie(struct ath6kl *ar)
135 {
136 struct ath6kl_cookie *cookie;
137
138 cookie = ar->cookie_list;
139 if (cookie != NULL) {
140 ar->cookie_list = cookie->arc_list_next;
141 ar->cookie_count--;
142 }
143
144 return cookie;
145 }
146
147 void ath6kl_cookie_init(struct ath6kl *ar)
148 {
149 u32 i;
150
151 ar->cookie_list = NULL;
152 ar->cookie_count = 0;
153
154 memset(ar->cookie_mem, 0, sizeof(ar->cookie_mem));
155
156 for (i = 0; i < MAX_COOKIE_NUM; i++)
157 ath6kl_free_cookie(ar, &ar->cookie_mem[i]);
158 }
159
160 void ath6kl_cookie_cleanup(struct ath6kl *ar)
161 {
162 ar->cookie_list = NULL;
163 ar->cookie_count = 0;
164 }
165
166 void ath6kl_free_cookie(struct ath6kl *ar, struct ath6kl_cookie *cookie)
167 {
168 /* Insert first */
169
170 if (!ar || !cookie)
171 return;
172
173 cookie->arc_list_next = ar->cookie_list;
174 ar->cookie_list = cookie;
175 ar->cookie_count++;
176 }
177
178 /* set the window address register (using 4-byte register access ). */
179 static int ath6kl_set_addrwin_reg(struct ath6kl *ar, u32 reg_addr, u32 addr)
180 {
181 int status;
182 s32 i;
183 __le32 addr_val;
184
185 /*
186 * Write bytes 1,2,3 of the register to set the upper address bytes,
187 * the LSB is written last to initiate the access cycle
188 */
189
190 for (i = 1; i <= 3; i++) {
191 /*
192 * Fill the buffer with the address byte value we want to
193 * hit 4 times. No need to worry about endianness as the
194 * same byte is copied to all four bytes of addr_val at
195 * any time.
196 */
197 memset((u8 *)&addr_val, ((u8 *)&addr)[i], 4);
198
199 /*
200 * Hit each byte of the register address with a 4-byte
201 * write operation to the same address, this is a harmless
202 * operation.
203 */
204 status = hif_read_write_sync(ar, reg_addr + i, (u8 *)&addr_val,
205 4, HIF_WR_SYNC_BYTE_FIX);
206 if (status)
207 break;
208 }
209
210 if (status) {
211 ath6kl_err("failed to write initial bytes of 0x%x to window reg: 0x%X\n",
212 addr, reg_addr);
213 return status;
214 }
215
216 /*
217 * Write the address register again, this time write the whole
218 * 4-byte value. The effect here is that the LSB write causes the
219 * cycle to start, the extra 3 byte write to bytes 1,2,3 has no
220 * effect since we are writing the same values again
221 */
222 addr_val = cpu_to_le32(addr);
223 status = hif_read_write_sync(ar, reg_addr,
224 (u8 *)&(addr_val),
225 4, HIF_WR_SYNC_BYTE_INC);
226
227 if (status) {
228 ath6kl_err("failed to write 0x%x to window reg: 0x%X\n",
229 addr, reg_addr);
230 return status;
231 }
232
233 return 0;
234 }
235
236 /*
237 * Read from the hardware through its diagnostic window. No cooperation
238 * from the firmware is required for this.
239 */
240 int ath6kl_diag_read32(struct ath6kl *ar, u32 address, u32 *value)
241 {
242 int ret;
243
244 /* set window register to start read cycle */
245 ret = ath6kl_set_addrwin_reg(ar, WINDOW_READ_ADDR_ADDRESS, address);
246 if (ret)
247 return ret;
248
249 /* read the data */
250 ret = hif_read_write_sync(ar, WINDOW_DATA_ADDRESS, (u8 *) value,
251 sizeof(*value), HIF_RD_SYNC_BYTE_INC);
252 if (ret) {
253 ath6kl_warn("failed to read32 through diagnose window: %d\n",
254 ret);
255 return ret;
256 }
257
258 return 0;
259 }
260
261 /*
262 * Write to the ATH6KL through its diagnostic window. No cooperation from
263 * the Target is required for this.
264 */
265 int ath6kl_diag_write32(struct ath6kl *ar, u32 address, __le32 value)
266 {
267 int ret;
268
269 /* set write data */
270 ret = hif_read_write_sync(ar, WINDOW_DATA_ADDRESS, (u8 *) &value,
271 sizeof(value), HIF_WR_SYNC_BYTE_INC);
272 if (ret) {
273 ath6kl_err("failed to write 0x%x during diagnose window to 0x%d\n",
274 address, value);
275 return ret;
276 }
277
278 /* set window register, which starts the write cycle */
279 return ath6kl_set_addrwin_reg(ar, WINDOW_WRITE_ADDR_ADDRESS,
280 address);
281 }
282
283 int ath6kl_diag_read(struct ath6kl *ar, u32 address, void *data, u32 length)
284 {
285 u32 count, *buf = data;
286 int ret;
287
288 if (WARN_ON(length % 4))
289 return -EINVAL;
290
291 for (count = 0; count < length / 4; count++, address += 4) {
292 ret = ath6kl_diag_read32(ar, address, &buf[count]);
293 if (ret)
294 return ret;
295 }
296
297 return 0;
298 }
299
300 int ath6kl_diag_write(struct ath6kl *ar, u32 address, void *data, u32 length)
301 {
302 u32 count;
303 __le32 *buf = data;
304 int ret;
305
306 if (WARN_ON(length % 4))
307 return -EINVAL;
308
309 for (count = 0; count < length / 4; count++, address += 4) {
310 ret = ath6kl_diag_write32(ar, address, buf[count]);
311 if (ret)
312 return ret;
313 }
314
315 return 0;
316 }
317
318 int ath6kl_read_fwlogs(struct ath6kl *ar)
319 {
320 struct ath6kl_dbglog_hdr debug_hdr;
321 struct ath6kl_dbglog_buf debug_buf;
322 u32 address, length, dropped, firstbuf, debug_hdr_addr;
323 int ret = 0, loop;
324 u8 *buf;
325
326 buf = kmalloc(ATH6KL_FWLOG_PAYLOAD_SIZE, GFP_KERNEL);
327 if (!buf)
328 return -ENOMEM;
329
330 address = TARG_VTOP(ar->target_type,
331 ath6kl_get_hi_item_addr(ar,
332 HI_ITEM(hi_dbglog_hdr)));
333
334 ret = ath6kl_diag_read32(ar, address, &debug_hdr_addr);
335 if (ret)
336 goto out;
337
338 /* Get the contents of the ring buffer */
339 if (debug_hdr_addr == 0) {
340 ath6kl_warn("Invalid address for debug_hdr_addr\n");
341 ret = -EINVAL;
342 goto out;
343 }
344
345 address = TARG_VTOP(ar->target_type, debug_hdr_addr);
346 ath6kl_diag_read(ar, address, &debug_hdr, sizeof(debug_hdr));
347
348 address = TARG_VTOP(ar->target_type,
349 le32_to_cpu(debug_hdr.dbuf_addr));
350 firstbuf = address;
351 dropped = le32_to_cpu(debug_hdr.dropped);
352 ath6kl_diag_read(ar, address, &debug_buf, sizeof(debug_buf));
353
354 loop = 100;
355
356 do {
357 address = TARG_VTOP(ar->target_type,
358 le32_to_cpu(debug_buf.buffer_addr));
359 length = le32_to_cpu(debug_buf.length);
360
361 if (length != 0 && (le32_to_cpu(debug_buf.length) <=
362 le32_to_cpu(debug_buf.bufsize))) {
363 length = ALIGN(length, 4);
364
365 ret = ath6kl_diag_read(ar, address,
366 buf, length);
367 if (ret)
368 goto out;
369
370 ath6kl_debug_fwlog_event(ar, buf, length);
371 }
372
373 address = TARG_VTOP(ar->target_type,
374 le32_to_cpu(debug_buf.next));
375 ath6kl_diag_read(ar, address, &debug_buf, sizeof(debug_buf));
376 if (ret)
377 goto out;
378
379 loop--;
380
381 if (WARN_ON(loop == 0)) {
382 ret = -ETIMEDOUT;
383 goto out;
384 }
385 } while (address != firstbuf);
386
387 out:
388 kfree(buf);
389
390 return ret;
391 }
392
393 /* FIXME: move to a better place, target.h? */
394 #define AR6003_RESET_CONTROL_ADDRESS 0x00004000
395 #define AR6004_RESET_CONTROL_ADDRESS 0x00004000
396
397 void ath6kl_reset_device(struct ath6kl *ar, u32 target_type,
398 bool wait_fot_compltn, bool cold_reset)
399 {
400 int status = 0;
401 u32 address;
402 __le32 data;
403
404 if (target_type != TARGET_TYPE_AR6003 &&
405 target_type != TARGET_TYPE_AR6004)
406 return;
407
408 data = cold_reset ? cpu_to_le32(RESET_CONTROL_COLD_RST) :
409 cpu_to_le32(RESET_CONTROL_MBOX_RST);
410
411 switch (target_type) {
412 case TARGET_TYPE_AR6003:
413 address = AR6003_RESET_CONTROL_ADDRESS;
414 break;
415 case TARGET_TYPE_AR6004:
416 address = AR6004_RESET_CONTROL_ADDRESS;
417 break;
418 default:
419 address = AR6003_RESET_CONTROL_ADDRESS;
420 break;
421 }
422
423 status = ath6kl_diag_write32(ar, address, data);
424
425 if (status)
426 ath6kl_err("failed to reset target\n");
427 }
428
429 static void ath6kl_install_static_wep_keys(struct ath6kl_vif *vif)
430 {
431 u8 index;
432 u8 keyusage;
433
434 for (index = WMI_MIN_KEY_INDEX; index <= WMI_MAX_KEY_INDEX; index++) {
435 if (vif->wep_key_list[index].key_len) {
436 keyusage = GROUP_USAGE;
437 if (index == vif->def_txkey_index)
438 keyusage |= TX_USAGE;
439
440 ath6kl_wmi_addkey_cmd(vif->ar->wmi, vif->fw_vif_idx,
441 index,
442 WEP_CRYPT,
443 keyusage,
444 vif->wep_key_list[index].key_len,
445 NULL,
446 vif->wep_key_list[index].key,
447 KEY_OP_INIT_VAL, NULL,
448 NO_SYNC_WMIFLAG);
449 }
450 }
451 }
452
453 void ath6kl_connect_ap_mode_bss(struct ath6kl_vif *vif, u16 channel)
454 {
455 struct ath6kl *ar = vif->ar;
456 struct ath6kl_req_key *ik;
457 int res;
458 u8 key_rsc[ATH6KL_KEY_SEQ_LEN];
459
460 ik = &ar->ap_mode_bkey;
461
462 ath6kl_dbg(ATH6KL_DBG_WLAN_CFG, "AP mode started on %u MHz\n", channel);
463
464 switch (vif->auth_mode) {
465 case NONE_AUTH:
466 if (vif->prwise_crypto == WEP_CRYPT)
467 ath6kl_install_static_wep_keys(vif);
468 break;
469 case WPA_PSK_AUTH:
470 case WPA2_PSK_AUTH:
471 case (WPA_PSK_AUTH | WPA2_PSK_AUTH):
472 if (!ik->valid)
473 break;
474
475 ath6kl_dbg(ATH6KL_DBG_WLAN_CFG, "Delayed addkey for "
476 "the initial group key for AP mode\n");
477 memset(key_rsc, 0, sizeof(key_rsc));
478 res = ath6kl_wmi_addkey_cmd(
479 ar->wmi, vif->fw_vif_idx, ik->key_index, ik->key_type,
480 GROUP_USAGE, ik->key_len, key_rsc, ik->key,
481 KEY_OP_INIT_VAL, NULL, SYNC_BOTH_WMIFLAG);
482 if (res) {
483 ath6kl_dbg(ATH6KL_DBG_WLAN_CFG, "Delayed "
484 "addkey failed: %d\n", res);
485 }
486 break;
487 }
488
489 ath6kl_wmi_bssfilter_cmd(ar->wmi, vif->fw_vif_idx, NONE_BSS_FILTER, 0);
490 set_bit(CONNECTED, &vif->flags);
491 netif_carrier_on(vif->ndev);
492 }
493
494 void ath6kl_connect_ap_mode_sta(struct ath6kl_vif *vif, u16 aid, u8 *mac_addr,
495 u8 keymgmt, u8 ucipher, u8 auth,
496 u8 assoc_req_len, u8 *assoc_info)
497 {
498 struct ath6kl *ar = vif->ar;
499 u8 *ies = NULL, *wpa_ie = NULL, *pos;
500 size_t ies_len = 0;
501 struct station_info sinfo;
502
503 ath6kl_dbg(ATH6KL_DBG_TRC, "new station %pM aid=%d\n", mac_addr, aid);
504
505 if (assoc_req_len > sizeof(struct ieee80211_hdr_3addr)) {
506 struct ieee80211_mgmt *mgmt =
507 (struct ieee80211_mgmt *) assoc_info;
508 if (ieee80211_is_assoc_req(mgmt->frame_control) &&
509 assoc_req_len >= sizeof(struct ieee80211_hdr_3addr) +
510 sizeof(mgmt->u.assoc_req)) {
511 ies = mgmt->u.assoc_req.variable;
512 ies_len = assoc_info + assoc_req_len - ies;
513 } else if (ieee80211_is_reassoc_req(mgmt->frame_control) &&
514 assoc_req_len >= sizeof(struct ieee80211_hdr_3addr)
515 + sizeof(mgmt->u.reassoc_req)) {
516 ies = mgmt->u.reassoc_req.variable;
517 ies_len = assoc_info + assoc_req_len - ies;
518 }
519 }
520
521 pos = ies;
522 while (pos && pos + 1 < ies + ies_len) {
523 if (pos + 2 + pos[1] > ies + ies_len)
524 break;
525 if (pos[0] == WLAN_EID_RSN)
526 wpa_ie = pos; /* RSN IE */
527 else if (pos[0] == WLAN_EID_VENDOR_SPECIFIC &&
528 pos[1] >= 4 &&
529 pos[2] == 0x00 && pos[3] == 0x50 && pos[4] == 0xf2) {
530 if (pos[5] == 0x01)
531 wpa_ie = pos; /* WPA IE */
532 else if (pos[5] == 0x04) {
533 wpa_ie = pos; /* WPS IE */
534 break; /* overrides WPA/RSN IE */
535 }
536 }
537 pos += 2 + pos[1];
538 }
539
540 ath6kl_add_new_sta(ar, mac_addr, aid, wpa_ie,
541 wpa_ie ? 2 + wpa_ie[1] : 0,
542 keymgmt, ucipher, auth);
543
544 /* send event to application */
545 memset(&sinfo, 0, sizeof(sinfo));
546
547 /* TODO: sinfo.generation */
548
549 sinfo.assoc_req_ies = ies;
550 sinfo.assoc_req_ies_len = ies_len;
551 sinfo.filled |= STATION_INFO_ASSOC_REQ_IES;
552
553 cfg80211_new_sta(vif->ndev, mac_addr, &sinfo, GFP_KERNEL);
554
555 netif_wake_queue(vif->ndev);
556 }
557
558 /* Functions for Tx credit handling */
559 void ath6k_credit_init(struct htc_credit_state_info *cred_info,
560 struct list_head *ep_list,
561 int tot_credits)
562 {
563 struct htc_endpoint_credit_dist *cur_ep_dist;
564 int count;
565
566 cred_info->cur_free_credits = tot_credits;
567 cred_info->total_avail_credits = tot_credits;
568
569 list_for_each_entry(cur_ep_dist, ep_list, list) {
570 if (cur_ep_dist->endpoint == ENDPOINT_0)
571 continue;
572
573 cur_ep_dist->cred_min = cur_ep_dist->cred_per_msg;
574
575 if (tot_credits > 4)
576 if ((cur_ep_dist->svc_id == WMI_DATA_BK_SVC) ||
577 (cur_ep_dist->svc_id == WMI_DATA_BE_SVC)) {
578 ath6kl_deposit_credit_to_ep(cred_info,
579 cur_ep_dist,
580 cur_ep_dist->cred_min);
581 cur_ep_dist->dist_flags |= HTC_EP_ACTIVE;
582 }
583
584 if (cur_ep_dist->svc_id == WMI_CONTROL_SVC) {
585 ath6kl_deposit_credit_to_ep(cred_info, cur_ep_dist,
586 cur_ep_dist->cred_min);
587 /*
588 * Control service is always marked active, it
589 * never goes inactive EVER.
590 */
591 cur_ep_dist->dist_flags |= HTC_EP_ACTIVE;
592 } else if (cur_ep_dist->svc_id == WMI_DATA_BK_SVC)
593 /* this is the lowest priority data endpoint */
594 cred_info->lowestpri_ep_dist = cur_ep_dist->list;
595
596 /*
597 * Streams have to be created (explicit | implicit) for all
598 * kinds of traffic. BE endpoints are also inactive in the
599 * beginning. When BE traffic starts it creates implicit
600 * streams that redistributes credits.
601 *
602 * Note: all other endpoints have minimums set but are
603 * initially given NO credits. credits will be distributed
604 * as traffic activity demands
605 */
606 }
607
608 WARN_ON(cred_info->cur_free_credits <= 0);
609
610 list_for_each_entry(cur_ep_dist, ep_list, list) {
611 if (cur_ep_dist->endpoint == ENDPOINT_0)
612 continue;
613
614 if (cur_ep_dist->svc_id == WMI_CONTROL_SVC)
615 cur_ep_dist->cred_norm = cur_ep_dist->cred_per_msg;
616 else {
617 /*
618 * For the remaining data endpoints, we assume that
619 * each cred_per_msg are the same. We use a simple
620 * calculation here, we take the remaining credits
621 * and determine how many max messages this can
622 * cover and then set each endpoint's normal value
623 * equal to 3/4 this amount.
624 */
625 count = (cred_info->cur_free_credits /
626 cur_ep_dist->cred_per_msg)
627 * cur_ep_dist->cred_per_msg;
628 count = (count * 3) >> 2;
629 count = max(count, cur_ep_dist->cred_per_msg);
630 cur_ep_dist->cred_norm = count;
631
632 }
633 }
634 }
635
636 /* initialize and setup credit distribution */
637 int ath6k_setup_credit_dist(void *htc_handle,
638 struct htc_credit_state_info *cred_info)
639 {
640 u16 servicepriority[5];
641
642 memset(cred_info, 0, sizeof(struct htc_credit_state_info));
643
644 servicepriority[0] = WMI_CONTROL_SVC; /* highest */
645 servicepriority[1] = WMI_DATA_VO_SVC;
646 servicepriority[2] = WMI_DATA_VI_SVC;
647 servicepriority[3] = WMI_DATA_BE_SVC;
648 servicepriority[4] = WMI_DATA_BK_SVC; /* lowest */
649
650 /* set priority list */
651 ath6kl_htc_set_credit_dist(htc_handle, cred_info, servicepriority, 5);
652
653 return 0;
654 }
655
656 /* reduce an ep's credits back to a set limit */
657 static void ath6k_reduce_credits(struct htc_credit_state_info *cred_info,
658 struct htc_endpoint_credit_dist *ep_dist,
659 int limit)
660 {
661 int credits;
662
663 ep_dist->cred_assngd = limit;
664
665 if (ep_dist->credits <= limit)
666 return;
667
668 credits = ep_dist->credits - limit;
669 ep_dist->credits -= credits;
670 cred_info->cur_free_credits += credits;
671 }
672
673 static void ath6k_credit_update(struct htc_credit_state_info *cred_info,
674 struct list_head *epdist_list)
675 {
676 struct htc_endpoint_credit_dist *cur_dist_list;
677
678 list_for_each_entry(cur_dist_list, epdist_list, list) {
679 if (cur_dist_list->endpoint == ENDPOINT_0)
680 continue;
681
682 if (cur_dist_list->cred_to_dist > 0) {
683 cur_dist_list->credits +=
684 cur_dist_list->cred_to_dist;
685 cur_dist_list->cred_to_dist = 0;
686 if (cur_dist_list->credits >
687 cur_dist_list->cred_assngd)
688 ath6k_reduce_credits(cred_info,
689 cur_dist_list,
690 cur_dist_list->cred_assngd);
691
692 if (cur_dist_list->credits >
693 cur_dist_list->cred_norm)
694 ath6k_reduce_credits(cred_info, cur_dist_list,
695 cur_dist_list->cred_norm);
696
697 if (!(cur_dist_list->dist_flags & HTC_EP_ACTIVE)) {
698 if (cur_dist_list->txq_depth == 0)
699 ath6k_reduce_credits(cred_info,
700 cur_dist_list, 0);
701 }
702 }
703 }
704 }
705
706 /*
707 * HTC has an endpoint that needs credits, ep_dist is the endpoint in
708 * question.
709 */
710 void ath6k_seek_credits(struct htc_credit_state_info *cred_info,
711 struct htc_endpoint_credit_dist *ep_dist)
712 {
713 struct htc_endpoint_credit_dist *curdist_list;
714 int credits = 0;
715 int need;
716
717 if (ep_dist->svc_id == WMI_CONTROL_SVC)
718 goto out;
719
720 if ((ep_dist->svc_id == WMI_DATA_VI_SVC) ||
721 (ep_dist->svc_id == WMI_DATA_VO_SVC))
722 if ((ep_dist->cred_assngd >= ep_dist->cred_norm))
723 goto out;
724
725 /*
726 * For all other services, we follow a simple algorithm of:
727 *
728 * 1. checking the free pool for credits
729 * 2. checking lower priority endpoints for credits to take
730 */
731
732 credits = min(cred_info->cur_free_credits, ep_dist->seek_cred);
733
734 if (credits >= ep_dist->seek_cred)
735 goto out;
736
737 /*
738 * We don't have enough in the free pool, try taking away from
739 * lower priority services The rule for taking away credits:
740 *
741 * 1. Only take from lower priority endpoints
742 * 2. Only take what is allocated above the minimum (never
743 * starve an endpoint completely)
744 * 3. Only take what you need.
745 */
746
747 list_for_each_entry_reverse(curdist_list,
748 &cred_info->lowestpri_ep_dist,
749 list) {
750 if (curdist_list == ep_dist)
751 break;
752
753 need = ep_dist->seek_cred - cred_info->cur_free_credits;
754
755 if ((curdist_list->cred_assngd - need) >=
756 curdist_list->cred_min) {
757 /*
758 * The current one has been allocated more than
759 * it's minimum and it has enough credits assigned
760 * above it's minimum to fulfill our need try to
761 * take away just enough to fulfill our need.
762 */
763 ath6k_reduce_credits(cred_info, curdist_list,
764 curdist_list->cred_assngd - need);
765
766 if (cred_info->cur_free_credits >=
767 ep_dist->seek_cred)
768 break;
769 }
770
771 if (curdist_list->endpoint == ENDPOINT_0)
772 break;
773 }
774
775 credits = min(cred_info->cur_free_credits, ep_dist->seek_cred);
776
777 out:
778 /* did we find some credits? */
779 if (credits)
780 ath6kl_deposit_credit_to_ep(cred_info, ep_dist, credits);
781
782 ep_dist->seek_cred = 0;
783 }
784
785 /* redistribute credits based on activity change */
786 static void ath6k_redistribute_credits(struct htc_credit_state_info *info,
787 struct list_head *ep_dist_list)
788 {
789 struct htc_endpoint_credit_dist *curdist_list;
790
791 list_for_each_entry(curdist_list, ep_dist_list, list) {
792 if (curdist_list->endpoint == ENDPOINT_0)
793 continue;
794
795 if ((curdist_list->svc_id == WMI_DATA_BK_SVC) ||
796 (curdist_list->svc_id == WMI_DATA_BE_SVC))
797 curdist_list->dist_flags |= HTC_EP_ACTIVE;
798
799 if ((curdist_list->svc_id != WMI_CONTROL_SVC) &&
800 !(curdist_list->dist_flags & HTC_EP_ACTIVE)) {
801 if (curdist_list->txq_depth == 0)
802 ath6k_reduce_credits(info,
803 curdist_list, 0);
804 else
805 ath6k_reduce_credits(info,
806 curdist_list,
807 curdist_list->cred_min);
808 }
809 }
810 }
811
812 /*
813 *
814 * This function is invoked whenever endpoints require credit
815 * distributions. A lock is held while this function is invoked, this
816 * function shall NOT block. The ep_dist_list is a list of distribution
817 * structures in prioritized order as defined by the call to the
818 * htc_set_credit_dist() api.
819 */
820 void ath6k_credit_distribute(struct htc_credit_state_info *cred_info,
821 struct list_head *ep_dist_list,
822 enum htc_credit_dist_reason reason)
823 {
824 switch (reason) {
825 case HTC_CREDIT_DIST_SEND_COMPLETE:
826 ath6k_credit_update(cred_info, ep_dist_list);
827 break;
828 case HTC_CREDIT_DIST_ACTIVITY_CHANGE:
829 ath6k_redistribute_credits(cred_info, ep_dist_list);
830 break;
831 default:
832 break;
833 }
834
835 WARN_ON(cred_info->cur_free_credits > cred_info->total_avail_credits);
836 WARN_ON(cred_info->cur_free_credits < 0);
837 }
838
839 void disconnect_timer_handler(unsigned long ptr)
840 {
841 struct net_device *dev = (struct net_device *)ptr;
842 struct ath6kl_vif *vif = netdev_priv(dev);
843
844 ath6kl_init_profile_info(vif);
845 ath6kl_disconnect(vif);
846 }
847
848 void ath6kl_disconnect(struct ath6kl_vif *vif)
849 {
850 if (test_bit(CONNECTED, &vif->flags) ||
851 test_bit(CONNECT_PEND, &vif->flags)) {
852 ath6kl_wmi_disconnect_cmd(vif->ar->wmi, vif->fw_vif_idx);
853 /*
854 * Disconnect command is issued, clear the connect pending
855 * flag. The connected flag will be cleared in
856 * disconnect event notification.
857 */
858 clear_bit(CONNECT_PEND, &vif->flags);
859 }
860 }
861
862 void ath6kl_deep_sleep_enable(struct ath6kl *ar)
863 {
864 /* TODO: Pass vif instead of taking it from ar */
865 struct ath6kl_vif *vif = ar->vif;
866
867 switch (vif->sme_state) {
868 case SME_CONNECTING:
869 cfg80211_connect_result(vif->ndev, vif->bssid, NULL, 0,
870 NULL, 0,
871 WLAN_STATUS_UNSPECIFIED_FAILURE,
872 GFP_KERNEL);
873 break;
874 case SME_CONNECTED:
875 default:
876 /*
877 * FIXME: oddly enough smeState is in DISCONNECTED during
878 * suspend, why? Need to send disconnected event in that
879 * state.
880 */
881 cfg80211_disconnected(vif->ndev, 0, NULL, 0, GFP_KERNEL);
882 break;
883 }
884
885 if (test_bit(CONNECTED, &vif->flags) ||
886 test_bit(CONNECT_PEND, &vif->flags))
887 ath6kl_wmi_disconnect_cmd(ar->wmi, vif->fw_vif_idx);
888
889 vif->sme_state = SME_DISCONNECTED;
890
891 /* disable scanning */
892 if (ath6kl_wmi_scanparams_cmd(ar->wmi, vif->fw_vif_idx, 0xFFFF, 0, 0,
893 0, 0, 0, 0, 0, 0, 0) != 0)
894 printk(KERN_WARNING "ath6kl: failed to disable scan "
895 "during suspend\n");
896
897 ath6kl_cfg80211_scan_complete_event(vif, -ECANCELED);
898
899 /* save the current power mode before enabling power save */
900 ar->wmi->saved_pwr_mode = ar->wmi->pwr_mode;
901
902 if (ath6kl_wmi_powermode_cmd(ar->wmi, 0, REC_POWER) != 0)
903 ath6kl_warn("ath6kl_deep_sleep_enable: "
904 "wmi_powermode_cmd failed\n");
905 }
906
907 /* WMI Event handlers */
908
909 static const char *get_hw_id_string(u32 id)
910 {
911 switch (id) {
912 case AR6003_REV1_VERSION:
913 return "1.0";
914 case AR6003_REV2_VERSION:
915 return "2.0";
916 case AR6003_REV3_VERSION:
917 return "2.1.1";
918 default:
919 return "unknown";
920 }
921 }
922
923 void ath6kl_ready_event(void *devt, u8 *datap, u32 sw_ver, u32 abi_ver)
924 {
925 struct ath6kl *ar = devt;
926
927 memcpy(ar->mac_addr, datap, ETH_ALEN);
928 ath6kl_dbg(ATH6KL_DBG_TRC, "%s: mac addr = %pM\n",
929 __func__, ar->mac_addr);
930
931 ar->version.wlan_ver = sw_ver;
932 ar->version.abi_ver = abi_ver;
933
934 snprintf(ar->wiphy->fw_version,
935 sizeof(ar->wiphy->fw_version),
936 "%u.%u.%u.%u",
937 (ar->version.wlan_ver & 0xf0000000) >> 28,
938 (ar->version.wlan_ver & 0x0f000000) >> 24,
939 (ar->version.wlan_ver & 0x00ff0000) >> 16,
940 (ar->version.wlan_ver & 0x0000ffff));
941
942 /* indicate to the waiting thread that the ready event was received */
943 set_bit(WMI_READY, &ar->flag);
944 wake_up(&ar->event_wq);
945
946 ath6kl_info("hw %s fw %s%s\n",
947 get_hw_id_string(ar->wiphy->hw_version),
948 ar->wiphy->fw_version,
949 test_bit(TESTMODE, &ar->flag) ? " testmode" : "");
950 }
951
952 void ath6kl_scan_complete_evt(struct ath6kl_vif *vif, int status)
953 {
954 struct ath6kl *ar = vif->ar;
955
956 ath6kl_cfg80211_scan_complete_event(vif, status);
957
958 if (!ar->usr_bss_filter) {
959 clear_bit(CLEAR_BSSFILTER_ON_BEACON, &vif->flags);
960 ath6kl_wmi_bssfilter_cmd(ar->wmi, vif->fw_vif_idx,
961 NONE_BSS_FILTER, 0);
962 }
963
964 ath6kl_dbg(ATH6KL_DBG_WLAN_SCAN, "scan complete: %d\n", status);
965 }
966
967 void ath6kl_connect_event(struct ath6kl_vif *vif, u16 channel, u8 *bssid,
968 u16 listen_int, u16 beacon_int,
969 enum network_type net_type, u8 beacon_ie_len,
970 u8 assoc_req_len, u8 assoc_resp_len,
971 u8 *assoc_info)
972 {
973 struct ath6kl *ar = vif->ar;
974
975 ath6kl_cfg80211_connect_event(vif, channel, bssid,
976 listen_int, beacon_int,
977 net_type, beacon_ie_len,
978 assoc_req_len, assoc_resp_len,
979 assoc_info);
980
981 memcpy(vif->bssid, bssid, sizeof(vif->bssid));
982 vif->bss_ch = channel;
983
984 if ((vif->nw_type == INFRA_NETWORK))
985 ath6kl_wmi_listeninterval_cmd(ar->wmi, vif->fw_vif_idx,
986 ar->listen_intvl_t,
987 ar->listen_intvl_b);
988
989 netif_wake_queue(vif->ndev);
990
991 /* Update connect & link status atomically */
992 spin_lock_bh(&ar->lock);
993 set_bit(CONNECTED, &vif->flags);
994 clear_bit(CONNECT_PEND, &vif->flags);
995 netif_carrier_on(vif->ndev);
996 spin_unlock_bh(&ar->lock);
997
998 aggr_reset_state(vif->aggr_cntxt);
999 vif->reconnect_flag = 0;
1000
1001 if ((vif->nw_type == ADHOC_NETWORK) && ar->ibss_ps_enable) {
1002 memset(ar->node_map, 0, sizeof(ar->node_map));
1003 ar->node_num = 0;
1004 ar->next_ep_id = ENDPOINT_2;
1005 }
1006
1007 if (!ar->usr_bss_filter) {
1008 set_bit(CLEAR_BSSFILTER_ON_BEACON, &vif->flags);
1009 ath6kl_wmi_bssfilter_cmd(ar->wmi, vif->fw_vif_idx,
1010 CURRENT_BSS_FILTER, 0);
1011 }
1012 }
1013
1014 void ath6kl_tkip_micerr_event(struct ath6kl_vif *vif, u8 keyid, bool ismcast)
1015 {
1016 struct ath6kl_sta *sta;
1017 struct ath6kl *ar = vif->ar;
1018 u8 tsc[6];
1019
1020 /*
1021 * For AP case, keyid will have aid of STA which sent pkt with
1022 * MIC error. Use this aid to get MAC & send it to hostapd.
1023 */
1024 if (vif->nw_type == AP_NETWORK) {
1025 sta = ath6kl_find_sta_by_aid(ar, (keyid >> 2));
1026 if (!sta)
1027 return;
1028
1029 ath6kl_dbg(ATH6KL_DBG_TRC,
1030 "ap tkip mic error received from aid=%d\n", keyid);
1031
1032 memset(tsc, 0, sizeof(tsc)); /* FIX: get correct TSC */
1033 cfg80211_michael_mic_failure(vif->ndev, sta->mac,
1034 NL80211_KEYTYPE_PAIRWISE, keyid,
1035 tsc, GFP_KERNEL);
1036 } else
1037 ath6kl_cfg80211_tkip_micerr_event(vif, keyid, ismcast);
1038
1039 }
1040
1041 static void ath6kl_update_target_stats(struct ath6kl_vif *vif, u8 *ptr, u32 len)
1042 {
1043 struct wmi_target_stats *tgt_stats =
1044 (struct wmi_target_stats *) ptr;
1045 struct ath6kl *ar = vif->ar;
1046 struct target_stats *stats = &vif->target_stats;
1047 struct tkip_ccmp_stats *ccmp_stats;
1048 u8 ac;
1049
1050 if (len < sizeof(*tgt_stats))
1051 return;
1052
1053 ath6kl_dbg(ATH6KL_DBG_TRC, "updating target stats\n");
1054
1055 stats->tx_pkt += le32_to_cpu(tgt_stats->stats.tx.pkt);
1056 stats->tx_byte += le32_to_cpu(tgt_stats->stats.tx.byte);
1057 stats->tx_ucast_pkt += le32_to_cpu(tgt_stats->stats.tx.ucast_pkt);
1058 stats->tx_ucast_byte += le32_to_cpu(tgt_stats->stats.tx.ucast_byte);
1059 stats->tx_mcast_pkt += le32_to_cpu(tgt_stats->stats.tx.mcast_pkt);
1060 stats->tx_mcast_byte += le32_to_cpu(tgt_stats->stats.tx.mcast_byte);
1061 stats->tx_bcast_pkt += le32_to_cpu(tgt_stats->stats.tx.bcast_pkt);
1062 stats->tx_bcast_byte += le32_to_cpu(tgt_stats->stats.tx.bcast_byte);
1063 stats->tx_rts_success_cnt +=
1064 le32_to_cpu(tgt_stats->stats.tx.rts_success_cnt);
1065
1066 for (ac = 0; ac < WMM_NUM_AC; ac++)
1067 stats->tx_pkt_per_ac[ac] +=
1068 le32_to_cpu(tgt_stats->stats.tx.pkt_per_ac[ac]);
1069
1070 stats->tx_err += le32_to_cpu(tgt_stats->stats.tx.err);
1071 stats->tx_fail_cnt += le32_to_cpu(tgt_stats->stats.tx.fail_cnt);
1072 stats->tx_retry_cnt += le32_to_cpu(tgt_stats->stats.tx.retry_cnt);
1073 stats->tx_mult_retry_cnt +=
1074 le32_to_cpu(tgt_stats->stats.tx.mult_retry_cnt);
1075 stats->tx_rts_fail_cnt +=
1076 le32_to_cpu(tgt_stats->stats.tx.rts_fail_cnt);
1077 stats->tx_ucast_rate =
1078 ath6kl_wmi_get_rate(a_sle32_to_cpu(tgt_stats->stats.tx.ucast_rate));
1079
1080 stats->rx_pkt += le32_to_cpu(tgt_stats->stats.rx.pkt);
1081 stats->rx_byte += le32_to_cpu(tgt_stats->stats.rx.byte);
1082 stats->rx_ucast_pkt += le32_to_cpu(tgt_stats->stats.rx.ucast_pkt);
1083 stats->rx_ucast_byte += le32_to_cpu(tgt_stats->stats.rx.ucast_byte);
1084 stats->rx_mcast_pkt += le32_to_cpu(tgt_stats->stats.rx.mcast_pkt);
1085 stats->rx_mcast_byte += le32_to_cpu(tgt_stats->stats.rx.mcast_byte);
1086 stats->rx_bcast_pkt += le32_to_cpu(tgt_stats->stats.rx.bcast_pkt);
1087 stats->rx_bcast_byte += le32_to_cpu(tgt_stats->stats.rx.bcast_byte);
1088 stats->rx_frgment_pkt += le32_to_cpu(tgt_stats->stats.rx.frgment_pkt);
1089 stats->rx_err += le32_to_cpu(tgt_stats->stats.rx.err);
1090 stats->rx_crc_err += le32_to_cpu(tgt_stats->stats.rx.crc_err);
1091 stats->rx_key_cache_miss +=
1092 le32_to_cpu(tgt_stats->stats.rx.key_cache_miss);
1093 stats->rx_decrypt_err += le32_to_cpu(tgt_stats->stats.rx.decrypt_err);
1094 stats->rx_dupl_frame += le32_to_cpu(tgt_stats->stats.rx.dupl_frame);
1095 stats->rx_ucast_rate =
1096 ath6kl_wmi_get_rate(a_sle32_to_cpu(tgt_stats->stats.rx.ucast_rate));
1097
1098 ccmp_stats = &tgt_stats->stats.tkip_ccmp_stats;
1099
1100 stats->tkip_local_mic_fail +=
1101 le32_to_cpu(ccmp_stats->tkip_local_mic_fail);
1102 stats->tkip_cnter_measures_invoked +=
1103 le32_to_cpu(ccmp_stats->tkip_cnter_measures_invoked);
1104 stats->tkip_fmt_err += le32_to_cpu(ccmp_stats->tkip_fmt_err);
1105
1106 stats->ccmp_fmt_err += le32_to_cpu(ccmp_stats->ccmp_fmt_err);
1107 stats->ccmp_replays += le32_to_cpu(ccmp_stats->ccmp_replays);
1108
1109 stats->pwr_save_fail_cnt +=
1110 le32_to_cpu(tgt_stats->pm_stats.pwr_save_failure_cnt);
1111 stats->noise_floor_calib =
1112 a_sle32_to_cpu(tgt_stats->noise_floor_calib);
1113
1114 stats->cs_bmiss_cnt +=
1115 le32_to_cpu(tgt_stats->cserv_stats.cs_bmiss_cnt);
1116 stats->cs_low_rssi_cnt +=
1117 le32_to_cpu(tgt_stats->cserv_stats.cs_low_rssi_cnt);
1118 stats->cs_connect_cnt +=
1119 le16_to_cpu(tgt_stats->cserv_stats.cs_connect_cnt);
1120 stats->cs_discon_cnt +=
1121 le16_to_cpu(tgt_stats->cserv_stats.cs_discon_cnt);
1122
1123 stats->cs_ave_beacon_rssi =
1124 a_sle16_to_cpu(tgt_stats->cserv_stats.cs_ave_beacon_rssi);
1125
1126 stats->cs_last_roam_msec =
1127 tgt_stats->cserv_stats.cs_last_roam_msec;
1128 stats->cs_snr = tgt_stats->cserv_stats.cs_snr;
1129 stats->cs_rssi = a_sle16_to_cpu(tgt_stats->cserv_stats.cs_rssi);
1130
1131 stats->lq_val = le32_to_cpu(tgt_stats->lq_val);
1132
1133 stats->wow_pkt_dropped +=
1134 le32_to_cpu(tgt_stats->wow_stats.wow_pkt_dropped);
1135 stats->wow_host_pkt_wakeups +=
1136 tgt_stats->wow_stats.wow_host_pkt_wakeups;
1137 stats->wow_host_evt_wakeups +=
1138 tgt_stats->wow_stats.wow_host_evt_wakeups;
1139 stats->wow_evt_discarded +=
1140 le16_to_cpu(tgt_stats->wow_stats.wow_evt_discarded);
1141
1142 if (test_bit(STATS_UPDATE_PEND, &vif->flags)) {
1143 clear_bit(STATS_UPDATE_PEND, &vif->flags);
1144 wake_up(&ar->event_wq);
1145 }
1146 }
1147
1148 static void ath6kl_add_le32(__le32 *var, __le32 val)
1149 {
1150 *var = cpu_to_le32(le32_to_cpu(*var) + le32_to_cpu(val));
1151 }
1152
1153 void ath6kl_tgt_stats_event(struct ath6kl_vif *vif, u8 *ptr, u32 len)
1154 {
1155 struct wmi_ap_mode_stat *p = (struct wmi_ap_mode_stat *) ptr;
1156 struct ath6kl *ar = vif->ar;
1157 struct wmi_ap_mode_stat *ap = &ar->ap_stats;
1158 struct wmi_per_sta_stat *st_ap, *st_p;
1159 u8 ac;
1160
1161 if (vif->nw_type == AP_NETWORK) {
1162 if (len < sizeof(*p))
1163 return;
1164
1165 for (ac = 0; ac < AP_MAX_NUM_STA; ac++) {
1166 st_ap = &ap->sta[ac];
1167 st_p = &p->sta[ac];
1168
1169 ath6kl_add_le32(&st_ap->tx_bytes, st_p->tx_bytes);
1170 ath6kl_add_le32(&st_ap->tx_pkts, st_p->tx_pkts);
1171 ath6kl_add_le32(&st_ap->tx_error, st_p->tx_error);
1172 ath6kl_add_le32(&st_ap->tx_discard, st_p->tx_discard);
1173 ath6kl_add_le32(&st_ap->rx_bytes, st_p->rx_bytes);
1174 ath6kl_add_le32(&st_ap->rx_pkts, st_p->rx_pkts);
1175 ath6kl_add_le32(&st_ap->rx_error, st_p->rx_error);
1176 ath6kl_add_le32(&st_ap->rx_discard, st_p->rx_discard);
1177 }
1178
1179 } else {
1180 ath6kl_update_target_stats(vif, ptr, len);
1181 }
1182 }
1183
1184 void ath6kl_wakeup_event(void *dev)
1185 {
1186 struct ath6kl *ar = (struct ath6kl *) dev;
1187
1188 wake_up(&ar->event_wq);
1189 }
1190
1191 void ath6kl_txpwr_rx_evt(void *devt, u8 tx_pwr)
1192 {
1193 struct ath6kl *ar = (struct ath6kl *) devt;
1194
1195 ar->tx_pwr = tx_pwr;
1196 wake_up(&ar->event_wq);
1197 }
1198
1199 void ath6kl_pspoll_event(struct ath6kl_vif *vif, u8 aid)
1200 {
1201 struct ath6kl_sta *conn;
1202 struct sk_buff *skb;
1203 bool psq_empty = false;
1204 struct ath6kl *ar = vif->ar;
1205
1206 conn = ath6kl_find_sta_by_aid(ar, aid);
1207
1208 if (!conn)
1209 return;
1210 /*
1211 * Send out a packet queued on ps queue. When the ps queue
1212 * becomes empty update the PVB for this station.
1213 */
1214 spin_lock_bh(&conn->psq_lock);
1215 psq_empty = skb_queue_empty(&conn->psq);
1216 spin_unlock_bh(&conn->psq_lock);
1217
1218 if (psq_empty)
1219 /* TODO: Send out a NULL data frame */
1220 return;
1221
1222 spin_lock_bh(&conn->psq_lock);
1223 skb = skb_dequeue(&conn->psq);
1224 spin_unlock_bh(&conn->psq_lock);
1225
1226 conn->sta_flags |= STA_PS_POLLED;
1227 ath6kl_data_tx(skb, vif->ndev);
1228 conn->sta_flags &= ~STA_PS_POLLED;
1229
1230 spin_lock_bh(&conn->psq_lock);
1231 psq_empty = skb_queue_empty(&conn->psq);
1232 spin_unlock_bh(&conn->psq_lock);
1233
1234 if (psq_empty)
1235 ath6kl_wmi_set_pvb_cmd(ar->wmi, vif->fw_vif_idx, conn->aid, 0);
1236 }
1237
1238 void ath6kl_dtimexpiry_event(struct ath6kl_vif *vif)
1239 {
1240 bool mcastq_empty = false;
1241 struct sk_buff *skb;
1242 struct ath6kl *ar = vif->ar;
1243
1244 /*
1245 * If there are no associated STAs, ignore the DTIM expiry event.
1246 * There can be potential race conditions where the last associated
1247 * STA may disconnect & before the host could clear the 'Indicate
1248 * DTIM' request to the firmware, the firmware would have just
1249 * indicated a DTIM expiry event. The race is between 'clear DTIM
1250 * expiry cmd' going from the host to the firmware & the DTIM
1251 * expiry event happening from the firmware to the host.
1252 */
1253 if (!ar->sta_list_index)
1254 return;
1255
1256 spin_lock_bh(&ar->mcastpsq_lock);
1257 mcastq_empty = skb_queue_empty(&ar->mcastpsq);
1258 spin_unlock_bh(&ar->mcastpsq_lock);
1259
1260 if (mcastq_empty)
1261 return;
1262
1263 /* set the STA flag to dtim_expired for the frame to go out */
1264 set_bit(DTIM_EXPIRED, &vif->flags);
1265
1266 spin_lock_bh(&ar->mcastpsq_lock);
1267 while ((skb = skb_dequeue(&ar->mcastpsq)) != NULL) {
1268 spin_unlock_bh(&ar->mcastpsq_lock);
1269
1270 ath6kl_data_tx(skb, vif->ndev);
1271
1272 spin_lock_bh(&ar->mcastpsq_lock);
1273 }
1274 spin_unlock_bh(&ar->mcastpsq_lock);
1275
1276 clear_bit(DTIM_EXPIRED, &vif->flags);
1277
1278 /* clear the LSB of the BitMapCtl field of the TIM IE */
1279 ath6kl_wmi_set_pvb_cmd(ar->wmi, vif->fw_vif_idx, MCAST_AID, 0);
1280 }
1281
1282 void ath6kl_disconnect_event(struct ath6kl_vif *vif, u8 reason, u8 *bssid,
1283 u8 assoc_resp_len, u8 *assoc_info,
1284 u16 prot_reason_status)
1285 {
1286 struct ath6kl *ar = vif->ar;
1287
1288 if (vif->nw_type == AP_NETWORK) {
1289 if (!ath6kl_remove_sta(ar, bssid, prot_reason_status))
1290 return;
1291
1292 /* if no more associated STAs, empty the mcast PS q */
1293 if (ar->sta_list_index == 0) {
1294 spin_lock_bh(&ar->mcastpsq_lock);
1295 skb_queue_purge(&ar->mcastpsq);
1296 spin_unlock_bh(&ar->mcastpsq_lock);
1297
1298 /* clear the LSB of the TIM IE's BitMapCtl field */
1299 if (test_bit(WMI_READY, &ar->flag))
1300 ath6kl_wmi_set_pvb_cmd(ar->wmi, vif->fw_vif_idx,
1301 MCAST_AID, 0);
1302 }
1303
1304 if (!is_broadcast_ether_addr(bssid)) {
1305 /* send event to application */
1306 cfg80211_del_sta(vif->ndev, bssid, GFP_KERNEL);
1307 }
1308
1309 if (memcmp(vif->ndev->dev_addr, bssid, ETH_ALEN) == 0) {
1310 memset(vif->wep_key_list, 0, sizeof(vif->wep_key_list));
1311 clear_bit(CONNECTED, &vif->flags);
1312 }
1313 return;
1314 }
1315
1316 ath6kl_cfg80211_disconnect_event(vif, reason, bssid,
1317 assoc_resp_len, assoc_info,
1318 prot_reason_status);
1319
1320 aggr_reset_state(vif->aggr_cntxt);
1321
1322 del_timer(&vif->disconnect_timer);
1323
1324 ath6kl_dbg(ATH6KL_DBG_WLAN_CONNECT,
1325 "disconnect reason is %d\n", reason);
1326
1327 /*
1328 * If the event is due to disconnect cmd from the host, only they
1329 * the target would stop trying to connect. Under any other
1330 * condition, target would keep trying to connect.
1331 */
1332 if (reason == DISCONNECT_CMD) {
1333 if (!ar->usr_bss_filter && test_bit(WMI_READY, &ar->flag))
1334 ath6kl_wmi_bssfilter_cmd(ar->wmi, vif->fw_vif_idx,
1335 NONE_BSS_FILTER, 0);
1336 } else {
1337 set_bit(CONNECT_PEND, &vif->flags);
1338 if (((reason == ASSOC_FAILED) &&
1339 (prot_reason_status == 0x11)) ||
1340 ((reason == ASSOC_FAILED) && (prot_reason_status == 0x0)
1341 && (vif->reconnect_flag == 1))) {
1342 set_bit(CONNECTED, &vif->flags);
1343 return;
1344 }
1345 }
1346
1347 /* update connect & link status atomically */
1348 spin_lock_bh(&ar->lock);
1349 clear_bit(CONNECTED, &vif->flags);
1350 netif_carrier_off(vif->ndev);
1351 spin_unlock_bh(&ar->lock);
1352
1353 if ((reason != CSERV_DISCONNECT) || (vif->reconnect_flag != 1))
1354 vif->reconnect_flag = 0;
1355
1356 if (reason != CSERV_DISCONNECT)
1357 ar->user_key_ctrl = 0;
1358
1359 netif_stop_queue(vif->ndev);
1360 memset(vif->bssid, 0, sizeof(vif->bssid));
1361 vif->bss_ch = 0;
1362
1363 ath6kl_tx_data_cleanup(ar);
1364 }
1365
1366 static int ath6kl_open(struct net_device *dev)
1367 {
1368 struct ath6kl *ar = ath6kl_priv(dev);
1369 struct ath6kl_vif *vif = netdev_priv(dev);
1370
1371 spin_lock_bh(&ar->lock);
1372
1373 set_bit(WLAN_ENABLED, &vif->flags);
1374
1375 if (test_bit(CONNECTED, &vif->flags)) {
1376 netif_carrier_on(dev);
1377 netif_wake_queue(dev);
1378 } else
1379 netif_carrier_off(dev);
1380
1381 spin_unlock_bh(&ar->lock);
1382
1383 return 0;
1384 }
1385
1386 static int ath6kl_close(struct net_device *dev)
1387 {
1388 struct ath6kl *ar = ath6kl_priv(dev);
1389 struct ath6kl_vif *vif = netdev_priv(dev);
1390
1391 netif_stop_queue(dev);
1392
1393 ath6kl_disconnect(vif);
1394
1395 if (test_bit(WMI_READY, &ar->flag)) {
1396 if (ath6kl_wmi_scanparams_cmd(ar->wmi, vif->fw_vif_idx, 0xFFFF,
1397 0, 0, 0, 0, 0, 0, 0, 0, 0))
1398 return -EIO;
1399
1400 clear_bit(WLAN_ENABLED, &vif->flags);
1401 }
1402
1403 ath6kl_cfg80211_scan_complete_event(vif, -ECANCELED);
1404
1405 return 0;
1406 }
1407
1408 static struct net_device_stats *ath6kl_get_stats(struct net_device *dev)
1409 {
1410 struct ath6kl_vif *vif = netdev_priv(dev);
1411
1412 return &vif->net_stats;
1413 }
1414
1415 static struct net_device_ops ath6kl_netdev_ops = {
1416 .ndo_open = ath6kl_open,
1417 .ndo_stop = ath6kl_close,
1418 .ndo_start_xmit = ath6kl_data_tx,
1419 .ndo_get_stats = ath6kl_get_stats,
1420 };
1421
1422 void init_netdev(struct net_device *dev)
1423 {
1424 dev->netdev_ops = &ath6kl_netdev_ops;
1425 dev->watchdog_timeo = ATH6KL_TX_TIMEOUT;
1426
1427 dev->needed_headroom = ETH_HLEN;
1428 dev->needed_headroom += sizeof(struct ath6kl_llc_snap_hdr) +
1429 sizeof(struct wmi_data_hdr) + HTC_HDR_LENGTH
1430 + WMI_MAX_TX_META_SZ + ATH6KL_HTC_ALIGN_BYTES;
1431
1432 return;
1433 }
Linus' kernel tree