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fix a kmap leak in virtio_console
[linux/fpc-iii.git] / drivers / net / wireless / ti / wlcore / tx.c
blob87cd707affa240390f6b34ea0d1b28caf23ffb83
1 /*
2 * This file is part of wl1271
3 *
4 * Copyright (C) 2009 Nokia Corporation
5 *
6 * Contact: Luciano Coelho <luciano.coelho@nokia.com>
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * version 2 as published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20 * 02110-1301 USA
21 *
22 */
23
24 #include <linux/kernel.h>
25 #include <linux/module.h>
26 #include <linux/etherdevice.h>
27 #include <linux/spinlock.h>
28
29 #include "wlcore.h"
30 #include "debug.h"
31 #include "io.h"
32 #include "ps.h"
33 #include "tx.h"
34 #include "event.h"
35 #include "hw_ops.h"
36
37 /*
38 * TODO: this is here just for now, it must be removed when the data
39 * operations are in place.
40 */
41 #include "../wl12xx/reg.h"
42
43 static int wl1271_set_default_wep_key(struct wl1271 *wl,
44 struct wl12xx_vif *wlvif, u8 id)
45 {
46 int ret;
47 bool is_ap = (wlvif->bss_type == BSS_TYPE_AP_BSS);
48
49 if (is_ap)
50 ret = wl12xx_cmd_set_default_wep_key(wl, id,
51 wlvif->ap.bcast_hlid);
52 else
53 ret = wl12xx_cmd_set_default_wep_key(wl, id, wlvif->sta.hlid);
54
55 if (ret < 0)
56 return ret;
57
58 wl1271_debug(DEBUG_CRYPT, "default wep key idx: %d", (int)id);
59 return 0;
60 }
61
62 static int wl1271_alloc_tx_id(struct wl1271 *wl, struct sk_buff *skb)
63 {
64 int id;
65
66 id = find_first_zero_bit(wl->tx_frames_map, wl->num_tx_desc);
67 if (id >= wl->num_tx_desc)
68 return -EBUSY;
69
70 __set_bit(id, wl->tx_frames_map);
71 wl->tx_frames[id] = skb;
72 wl->tx_frames_cnt++;
73 return id;
74 }
75
76 void wl1271_free_tx_id(struct wl1271 *wl, int id)
77 {
78 if (__test_and_clear_bit(id, wl->tx_frames_map)) {
79 if (unlikely(wl->tx_frames_cnt == wl->num_tx_desc))
80 clear_bit(WL1271_FLAG_FW_TX_BUSY, &wl->flags);
81
82 wl->tx_frames[id] = NULL;
83 wl->tx_frames_cnt--;
84 }
85 }
86 EXPORT_SYMBOL(wl1271_free_tx_id);
87
88 static void wl1271_tx_ap_update_inconnection_sta(struct wl1271 *wl,
89 struct wl12xx_vif *wlvif,
90 struct sk_buff *skb)
91 {
92 struct ieee80211_hdr *hdr;
93
94 hdr = (struct ieee80211_hdr *)(skb->data +
95 sizeof(struct wl1271_tx_hw_descr));
96 if (!ieee80211_is_auth(hdr->frame_control))
97 return;
98
99 /*
100 * add the station to the known list before transmitting the
101 * authentication response. this way it won't get de-authed by FW
102 * when transmitting too soon.
103 */
104 wl1271_acx_set_inconnection_sta(wl, hdr->addr1);
105
106 /*
107 * ROC for 1 second on the AP channel for completing the connection.
108 * Note the ROC will be continued by the update_sta_state callbacks
109 * once the station reaches the associated state.
110 */
111 wlcore_update_inconn_sta(wl, wlvif, NULL, true);
112 wlvif->pending_auth_reply_time = jiffies;
113 cancel_delayed_work(&wlvif->pending_auth_complete_work);
114 ieee80211_queue_delayed_work(wl->hw,
115 &wlvif->pending_auth_complete_work,
116 msecs_to_jiffies(WLCORE_PEND_AUTH_ROC_TIMEOUT));
117 }
118
119 static void wl1271_tx_regulate_link(struct wl1271 *wl,
120 struct wl12xx_vif *wlvif,
121 u8 hlid)
122 {
123 bool fw_ps;
124 u8 tx_pkts;
125
126 if (WARN_ON(!test_bit(hlid, wlvif->links_map)))
127 return;
128
129 fw_ps = test_bit(hlid, (unsigned long *)&wl->ap_fw_ps_map);
130 tx_pkts = wl->links[hlid].allocated_pkts;
131
132 /*
133 * if in FW PS and there is enough data in FW we can put the link
134 * into high-level PS and clean out its TX queues.
135 * Make an exception if this is the only connected link. In this
136 * case FW-memory congestion is less of a problem.
137 * Note that a single connected STA means 3 active links, since we must
138 * account for the global and broadcast AP links. The "fw_ps" check
139 * assures us the third link is a STA connected to the AP. Otherwise
140 * the FW would not set the PSM bit.
141 */
142 if (wl->active_link_count > 3 && fw_ps &&
143 tx_pkts >= WL1271_PS_STA_MAX_PACKETS)
144 wl12xx_ps_link_start(wl, wlvif, hlid, true);
145 }
146
147 bool wl12xx_is_dummy_packet(struct wl1271 *wl, struct sk_buff *skb)
148 {
149 return wl->dummy_packet == skb;
150 }
151 EXPORT_SYMBOL(wl12xx_is_dummy_packet);
152
153 static u8 wl12xx_tx_get_hlid_ap(struct wl1271 *wl, struct wl12xx_vif *wlvif,
154 struct sk_buff *skb, struct ieee80211_sta *sta)
155 {
156 if (sta) {
157 struct wl1271_station *wl_sta;
158
159 wl_sta = (struct wl1271_station *)sta->drv_priv;
160 return wl_sta->hlid;
161 } else {
162 struct ieee80211_hdr *hdr;
163
164 if (!test_bit(WLVIF_FLAG_AP_STARTED, &wlvif->flags))
165 return wl->system_hlid;
166
167 hdr = (struct ieee80211_hdr *)skb->data;
168 if (is_multicast_ether_addr(ieee80211_get_DA(hdr)))
169 return wlvif->ap.bcast_hlid;
170 else
171 return wlvif->ap.global_hlid;
172 }
173 }
174
175 u8 wl12xx_tx_get_hlid(struct wl1271 *wl, struct wl12xx_vif *wlvif,
176 struct sk_buff *skb, struct ieee80211_sta *sta)
177 {
178 struct ieee80211_tx_info *control;
179
180 if (wlvif->bss_type == BSS_TYPE_AP_BSS)
181 return wl12xx_tx_get_hlid_ap(wl, wlvif, skb, sta);
182
183 control = IEEE80211_SKB_CB(skb);
184 if (control->flags & IEEE80211_TX_CTL_TX_OFFCHAN) {
185 wl1271_debug(DEBUG_TX, "tx offchannel");
186 return wlvif->dev_hlid;
187 }
188
189 return wlvif->sta.hlid;
190 }
191
192 unsigned int wlcore_calc_packet_alignment(struct wl1271 *wl,
193 unsigned int packet_length)
194 {
195 if ((wl->quirks & WLCORE_QUIRK_TX_PAD_LAST_FRAME) ||
196 !(wl->quirks & WLCORE_QUIRK_TX_BLOCKSIZE_ALIGN))
197 return ALIGN(packet_length, WL1271_TX_ALIGN_TO);
198 else
199 return ALIGN(packet_length, WL12XX_BUS_BLOCK_SIZE);
200 }
201 EXPORT_SYMBOL(wlcore_calc_packet_alignment);
202
203 static int wl1271_tx_allocate(struct wl1271 *wl, struct wl12xx_vif *wlvif,
204 struct sk_buff *skb, u32 extra, u32 buf_offset,
205 u8 hlid, bool is_gem)
206 {
207 struct wl1271_tx_hw_descr *desc;
208 u32 total_len = skb->len + sizeof(struct wl1271_tx_hw_descr) + extra;
209 u32 total_blocks;
210 int id, ret = -EBUSY, ac;
211 u32 spare_blocks;
212
213 if (buf_offset + total_len > wl->aggr_buf_size)
214 return -EAGAIN;
215
216 spare_blocks = wlcore_hw_get_spare_blocks(wl, is_gem);
217
218 /* allocate free identifier for the packet */
219 id = wl1271_alloc_tx_id(wl, skb);
220 if (id < 0)
221 return id;
222
223 total_blocks = wlcore_hw_calc_tx_blocks(wl, total_len, spare_blocks);
224
225 if (total_blocks <= wl->tx_blocks_available) {
226 desc = (struct wl1271_tx_hw_descr *)skb_push(
227 skb, total_len - skb->len);
228
229 wlcore_hw_set_tx_desc_blocks(wl, desc, total_blocks,
230 spare_blocks);
231
232 desc->id = id;
233
234 wl->tx_blocks_available -= total_blocks;
235 wl->tx_allocated_blocks += total_blocks;
236
237 /* If the FW was empty before, arm the Tx watchdog */
238 if (wl->tx_allocated_blocks == total_blocks)
239 wl12xx_rearm_tx_watchdog_locked(wl);
240
241 ac = wl1271_tx_get_queue(skb_get_queue_mapping(skb));
242 wl->tx_allocated_pkts[ac]++;
243
244 if (test_bit(hlid, wl->links_map))
245 wl->links[hlid].allocated_pkts++;
246
247 ret = 0;
248
249 wl1271_debug(DEBUG_TX,
250 "tx_allocate: size: %d, blocks: %d, id: %d",
251 total_len, total_blocks, id);
252 } else {
253 wl1271_free_tx_id(wl, id);
254 }
255
256 return ret;
257 }
258
259 static void wl1271_tx_fill_hdr(struct wl1271 *wl, struct wl12xx_vif *wlvif,
260 struct sk_buff *skb, u32 extra,
261 struct ieee80211_tx_info *control, u8 hlid)
262 {
263 struct timespec ts;
264 struct wl1271_tx_hw_descr *desc;
265 int ac, rate_idx;
266 s64 hosttime;
267 u16 tx_attr = 0;
268 __le16 frame_control;
269 struct ieee80211_hdr *hdr;
270 u8 *frame_start;
271 bool is_dummy;
272
273 desc = (struct wl1271_tx_hw_descr *) skb->data;
274 frame_start = (u8 *)(desc + 1);
275 hdr = (struct ieee80211_hdr *)(frame_start + extra);
276 frame_control = hdr->frame_control;
277
278 /* relocate space for security header */
279 if (extra) {
280 int hdrlen = ieee80211_hdrlen(frame_control);
281 memmove(frame_start, hdr, hdrlen);
282 skb_set_network_header(skb, skb_network_offset(skb) + extra);
283 }
284
285 /* configure packet life time */
286 getnstimeofday(&ts);
287 hosttime = (timespec_to_ns(&ts) >> 10);
288 desc->start_time = cpu_to_le32(hosttime - wl->time_offset);
289
290 is_dummy = wl12xx_is_dummy_packet(wl, skb);
291 if (is_dummy || !wlvif || wlvif->bss_type != BSS_TYPE_AP_BSS)
292 desc->life_time = cpu_to_le16(TX_HW_MGMT_PKT_LIFETIME_TU);
293 else
294 desc->life_time = cpu_to_le16(TX_HW_AP_MODE_PKT_LIFETIME_TU);
295
296 /* queue */
297 ac = wl1271_tx_get_queue(skb_get_queue_mapping(skb));
298 desc->tid = skb->priority;
299
300 if (is_dummy) {
301 /*
302 * FW expects the dummy packet to have an invalid session id -
303 * any session id that is different than the one set in the join
304 */
305 tx_attr = (SESSION_COUNTER_INVALID <<
306 TX_HW_ATTR_OFST_SESSION_COUNTER) &
307 TX_HW_ATTR_SESSION_COUNTER;
308
309 tx_attr |= TX_HW_ATTR_TX_DUMMY_REQ;
310 } else if (wlvif) {
311 u8 session_id = wl->session_ids[hlid];
312
313 if ((wl->quirks & WLCORE_QUIRK_AP_ZERO_SESSION_ID) &&
314 (wlvif->bss_type == BSS_TYPE_AP_BSS))
315 session_id = 0;
316
317 /* configure the tx attributes */
318 tx_attr = session_id << TX_HW_ATTR_OFST_SESSION_COUNTER;
319 }
320
321 desc->hlid = hlid;
322 if (is_dummy || !wlvif)
323 rate_idx = 0;
324 else if (wlvif->bss_type != BSS_TYPE_AP_BSS) {
325 /*
326 * if the packets are data packets
327 * send them with AP rate policies (EAPOLs are an exception),
328 * otherwise use default basic rates
329 */
330 if (skb->protocol == cpu_to_be16(ETH_P_PAE))
331 rate_idx = wlvif->sta.basic_rate_idx;
332 else if (control->flags & IEEE80211_TX_CTL_NO_CCK_RATE)
333 rate_idx = wlvif->sta.p2p_rate_idx;
334 else if (ieee80211_is_data(frame_control))
335 rate_idx = wlvif->sta.ap_rate_idx;
336 else
337 rate_idx = wlvif->sta.basic_rate_idx;
338 } else {
339 if (hlid == wlvif->ap.global_hlid)
340 rate_idx = wlvif->ap.mgmt_rate_idx;
341 else if (hlid == wlvif->ap.bcast_hlid ||
342 skb->protocol == cpu_to_be16(ETH_P_PAE) ||
343 !ieee80211_is_data(frame_control))
344 /*
345 * send non-data, bcast and EAPOLs using the
346 * min basic rate
347 */
348 rate_idx = wlvif->ap.bcast_rate_idx;
349 else
350 rate_idx = wlvif->ap.ucast_rate_idx[ac];
351 }
352
353 tx_attr |= rate_idx << TX_HW_ATTR_OFST_RATE_POLICY;
354
355 /* for WEP shared auth - no fw encryption is needed */
356 if (ieee80211_is_auth(frame_control) &&
357 ieee80211_has_protected(frame_control))
358 tx_attr |= TX_HW_ATTR_HOST_ENCRYPT;
359
360 desc->tx_attr = cpu_to_le16(tx_attr);
361
362 wlcore_hw_set_tx_desc_csum(wl, desc, skb);
363 wlcore_hw_set_tx_desc_data_len(wl, desc, skb);
364 }
365
366 /* caller must hold wl->mutex */
367 static int wl1271_prepare_tx_frame(struct wl1271 *wl, struct wl12xx_vif *wlvif,
368 struct sk_buff *skb, u32 buf_offset, u8 hlid)
369 {
370 struct ieee80211_tx_info *info;
371 u32 extra = 0;
372 int ret = 0;
373 u32 total_len;
374 bool is_dummy;
375 bool is_gem = false;
376
377 if (!skb) {
378 wl1271_error("discarding null skb");
379 return -EINVAL;
380 }
381
382 if (hlid == WL12XX_INVALID_LINK_ID) {
383 wl1271_error("invalid hlid. dropping skb 0x%p", skb);
384 return -EINVAL;
385 }
386
387 info = IEEE80211_SKB_CB(skb);
388
389 is_dummy = wl12xx_is_dummy_packet(wl, skb);
390
391 if ((wl->quirks & WLCORE_QUIRK_TKIP_HEADER_SPACE) &&
392 info->control.hw_key &&
393 info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP)
394 extra = WL1271_EXTRA_SPACE_TKIP;
395
396 if (info->control.hw_key) {
397 bool is_wep;
398 u8 idx = info->control.hw_key->hw_key_idx;
399 u32 cipher = info->control.hw_key->cipher;
400
401 is_wep = (cipher == WLAN_CIPHER_SUITE_WEP40) ||
402 (cipher == WLAN_CIPHER_SUITE_WEP104);
403
404 if (WARN_ON(is_wep && wlvif && wlvif->default_key != idx)) {
405 ret = wl1271_set_default_wep_key(wl, wlvif, idx);
406 if (ret < 0)
407 return ret;
408 wlvif->default_key = idx;
409 }
410
411 is_gem = (cipher == WL1271_CIPHER_SUITE_GEM);
412 }
413
414 ret = wl1271_tx_allocate(wl, wlvif, skb, extra, buf_offset, hlid,
415 is_gem);
416 if (ret < 0)
417 return ret;
418
419 wl1271_tx_fill_hdr(wl, wlvif, skb, extra, info, hlid);
420
421 if (!is_dummy && wlvif && wlvif->bss_type == BSS_TYPE_AP_BSS) {
422 wl1271_tx_ap_update_inconnection_sta(wl, wlvif, skb);
423 wl1271_tx_regulate_link(wl, wlvif, hlid);
424 }
425
426 /*
427 * The length of each packet is stored in terms of
428 * words. Thus, we must pad the skb data to make sure its
429 * length is aligned. The number of padding bytes is computed
430 * and set in wl1271_tx_fill_hdr.
431 * In special cases, we want to align to a specific block size
432 * (eg. for wl128x with SDIO we align to 256).
433 */
434 total_len = wlcore_calc_packet_alignment(wl, skb->len);
435
436 memcpy(wl->aggr_buf + buf_offset, skb->data, skb->len);
437 memset(wl->aggr_buf + buf_offset + skb->len, 0, total_len - skb->len);
438
439 /* Revert side effects in the dummy packet skb, so it can be reused */
440 if (is_dummy)
441 skb_pull(skb, sizeof(struct wl1271_tx_hw_descr));
442
443 return total_len;
444 }
445
446 u32 wl1271_tx_enabled_rates_get(struct wl1271 *wl, u32 rate_set,
447 enum ieee80211_band rate_band)
448 {
449 struct ieee80211_supported_band *band;
450 u32 enabled_rates = 0;
451 int bit;
452
453 band = wl->hw->wiphy->bands[rate_band];
454 for (bit = 0; bit < band->n_bitrates; bit++) {
455 if (rate_set & 0x1)
456 enabled_rates |= band->bitrates[bit].hw_value;
457 rate_set >>= 1;
458 }
459
460 /* MCS rates indication are on bits 16 - 31 */
461 rate_set >>= HW_HT_RATES_OFFSET - band->n_bitrates;
462
463 for (bit = 0; bit < 16; bit++) {
464 if (rate_set & 0x1)
465 enabled_rates |= (CONF_HW_BIT_RATE_MCS_0 << bit);
466 rate_set >>= 1;
467 }
468
469 return enabled_rates;
470 }
471
472 void wl1271_handle_tx_low_watermark(struct wl1271 *wl)
473 {
474 int i;
475 struct wl12xx_vif *wlvif;
476
477 wl12xx_for_each_wlvif(wl, wlvif) {
478 for (i = 0; i < NUM_TX_QUEUES; i++) {
479 if (wlcore_is_queue_stopped_by_reason(wl, wlvif, i,
480 WLCORE_QUEUE_STOP_REASON_WATERMARK) &&
481 wlvif->tx_queue_count[i] <=
482 WL1271_TX_QUEUE_LOW_WATERMARK)
483 /* firmware buffer has space, restart queues */
484 wlcore_wake_queue(wl, wlvif, i,
485 WLCORE_QUEUE_STOP_REASON_WATERMARK);
486 }
487 }
488 }
489
490 static int wlcore_select_ac(struct wl1271 *wl)
491 {
492 int i, q = -1, ac;
493 u32 min_pkts = 0xffffffff;
494
495 /*
496 * Find a non-empty ac where:
497 * 1. There are packets to transmit
498 * 2. The FW has the least allocated blocks
499 *
500 * We prioritize the ACs according to VO>VI>BE>BK
501 */
502 for (i = 0; i < NUM_TX_QUEUES; i++) {
503 ac = wl1271_tx_get_queue(i);
504 if (wl->tx_queue_count[ac] &&
505 wl->tx_allocated_pkts[ac] < min_pkts) {
506 q = ac;
507 min_pkts = wl->tx_allocated_pkts[q];
508 }
509 }
510
511 return q;
512 }
513
514 static struct sk_buff *wlcore_lnk_dequeue(struct wl1271 *wl,
515 struct wl1271_link *lnk, u8 q)
516 {
517 struct sk_buff *skb;
518 unsigned long flags;
519
520 skb = skb_dequeue(&lnk->tx_queue[q]);
521 if (skb) {
522 spin_lock_irqsave(&wl->wl_lock, flags);
523 WARN_ON_ONCE(wl->tx_queue_count[q] <= 0);
524 wl->tx_queue_count[q]--;
525 if (lnk->wlvif) {
526 WARN_ON_ONCE(lnk->wlvif->tx_queue_count[q] <= 0);
527 lnk->wlvif->tx_queue_count[q]--;
528 }
529 spin_unlock_irqrestore(&wl->wl_lock, flags);
530 }
531
532 return skb;
533 }
534
535 static struct sk_buff *wlcore_lnk_dequeue_high_prio(struct wl1271 *wl,
536 u8 hlid, u8 ac,
537 u8 *low_prio_hlid)
538 {
539 struct wl1271_link *lnk = &wl->links[hlid];
540
541 if (!wlcore_hw_lnk_high_prio(wl, hlid, lnk)) {
542 if (*low_prio_hlid == WL12XX_INVALID_LINK_ID &&
543 !skb_queue_empty(&lnk->tx_queue[ac]) &&
544 wlcore_hw_lnk_low_prio(wl, hlid, lnk))
545 /* we found the first non-empty low priority queue */
546 *low_prio_hlid = hlid;
547
548 return NULL;
549 }
550
551 return wlcore_lnk_dequeue(wl, lnk, ac);
552 }
553
554 static struct sk_buff *wlcore_vif_dequeue_high_prio(struct wl1271 *wl,
555 struct wl12xx_vif *wlvif,
556 u8 ac, u8 *hlid,
557 u8 *low_prio_hlid)
558 {
559 struct sk_buff *skb = NULL;
560 int i, h, start_hlid;
561
562 /* start from the link after the last one */
563 start_hlid = (wlvif->last_tx_hlid + 1) % WL12XX_MAX_LINKS;
564
565 /* dequeue according to AC, round robin on each link */
566 for (i = 0; i < WL12XX_MAX_LINKS; i++) {
567 h = (start_hlid + i) % WL12XX_MAX_LINKS;
568
569 /* only consider connected stations */
570 if (!test_bit(h, wlvif->links_map))
571 continue;
572
573 skb = wlcore_lnk_dequeue_high_prio(wl, h, ac,
574 low_prio_hlid);
575 if (!skb)
576 continue;
577
578 wlvif->last_tx_hlid = h;
579 break;
580 }
581
582 if (!skb)
583 wlvif->last_tx_hlid = 0;
584
585 *hlid = wlvif->last_tx_hlid;
586 return skb;
587 }
588
589 static struct sk_buff *wl1271_skb_dequeue(struct wl1271 *wl, u8 *hlid)
590 {
591 unsigned long flags;
592 struct wl12xx_vif *wlvif = wl->last_wlvif;
593 struct sk_buff *skb = NULL;
594 int ac;
595 u8 low_prio_hlid = WL12XX_INVALID_LINK_ID;
596
597 ac = wlcore_select_ac(wl);
598 if (ac < 0)
599 goto out;
600
601 /* continue from last wlvif (round robin) */
602 if (wlvif) {
603 wl12xx_for_each_wlvif_continue(wl, wlvif) {
604 if (!wlvif->tx_queue_count[ac])
605 continue;
606
607 skb = wlcore_vif_dequeue_high_prio(wl, wlvif, ac, hlid,
608 &low_prio_hlid);
609 if (!skb)
610 continue;
611
612 wl->last_wlvif = wlvif;
613 break;
614 }
615 }
616
617 /* dequeue from the system HLID before the restarting wlvif list */
618 if (!skb) {
619 skb = wlcore_lnk_dequeue_high_prio(wl, wl->system_hlid,
620 ac, &low_prio_hlid);
621 if (skb) {
622 *hlid = wl->system_hlid;
623 wl->last_wlvif = NULL;
624 }
625 }
626
627 /* Do a new pass over the wlvif list. But no need to continue
628 * after last_wlvif. The previous pass should have found it. */
629 if (!skb) {
630 wl12xx_for_each_wlvif(wl, wlvif) {
631 if (!wlvif->tx_queue_count[ac])
632 goto next;
633
634 skb = wlcore_vif_dequeue_high_prio(wl, wlvif, ac, hlid,
635 &low_prio_hlid);
636 if (skb) {
637 wl->last_wlvif = wlvif;
638 break;
639 }
640
641 next:
642 if (wlvif == wl->last_wlvif)
643 break;
644 }
645 }
646
647 /* no high priority skbs found - but maybe a low priority one? */
648 if (!skb && low_prio_hlid != WL12XX_INVALID_LINK_ID) {
649 struct wl1271_link *lnk = &wl->links[low_prio_hlid];
650 skb = wlcore_lnk_dequeue(wl, lnk, ac);
651
652 WARN_ON(!skb); /* we checked this before */
653 *hlid = low_prio_hlid;
654
655 /* ensure proper round robin in the vif/link levels */
656 wl->last_wlvif = lnk->wlvif;
657 if (lnk->wlvif)
658 lnk->wlvif->last_tx_hlid = low_prio_hlid;
659
660 }
661
662 out:
663 if (!skb &&
664 test_and_clear_bit(WL1271_FLAG_DUMMY_PACKET_PENDING, &wl->flags)) {
665 int q;
666
667 skb = wl->dummy_packet;
668 *hlid = wl->system_hlid;
669 q = wl1271_tx_get_queue(skb_get_queue_mapping(skb));
670 spin_lock_irqsave(&wl->wl_lock, flags);
671 WARN_ON_ONCE(wl->tx_queue_count[q] <= 0);
672 wl->tx_queue_count[q]--;
673 spin_unlock_irqrestore(&wl->wl_lock, flags);
674 }
675
676 return skb;
677 }
678
679 static void wl1271_skb_queue_head(struct wl1271 *wl, struct wl12xx_vif *wlvif,
680 struct sk_buff *skb, u8 hlid)
681 {
682 unsigned long flags;
683 int q = wl1271_tx_get_queue(skb_get_queue_mapping(skb));
684
685 if (wl12xx_is_dummy_packet(wl, skb)) {
686 set_bit(WL1271_FLAG_DUMMY_PACKET_PENDING, &wl->flags);
687 } else {
688 skb_queue_head(&wl->links[hlid].tx_queue[q], skb);
689
690 /* make sure we dequeue the same packet next time */
691 wlvif->last_tx_hlid = (hlid + WL12XX_MAX_LINKS - 1) %
692 WL12XX_MAX_LINKS;
693 }
694
695 spin_lock_irqsave(&wl->wl_lock, flags);
696 wl->tx_queue_count[q]++;
697 if (wlvif)
698 wlvif->tx_queue_count[q]++;
699 spin_unlock_irqrestore(&wl->wl_lock, flags);
700 }
701
702 static bool wl1271_tx_is_data_present(struct sk_buff *skb)
703 {
704 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
705
706 return ieee80211_is_data_present(hdr->frame_control);
707 }
708
709 void wl12xx_rearm_rx_streaming(struct wl1271 *wl, unsigned long *active_hlids)
710 {
711 struct wl12xx_vif *wlvif;
712 u32 timeout;
713 u8 hlid;
714
715 if (!wl->conf.rx_streaming.interval)
716 return;
717
718 if (!wl->conf.rx_streaming.always &&
719 !test_bit(WL1271_FLAG_SOFT_GEMINI, &wl->flags))
720 return;
721
722 timeout = wl->conf.rx_streaming.duration;
723 wl12xx_for_each_wlvif_sta(wl, wlvif) {
724 bool found = false;
725 for_each_set_bit(hlid, active_hlids, WL12XX_MAX_LINKS) {
726 if (test_bit(hlid, wlvif->links_map)) {
727 found = true;
728 break;
729 }
730 }
731
732 if (!found)
733 continue;
734
735 /* enable rx streaming */
736 if (!test_bit(WLVIF_FLAG_RX_STREAMING_STARTED, &wlvif->flags))
737 ieee80211_queue_work(wl->hw,
738 &wlvif->rx_streaming_enable_work);
739
740 mod_timer(&wlvif->rx_streaming_timer,
741 jiffies + msecs_to_jiffies(timeout));
742 }
743 }
744
745 /*
746 * Returns failure values only in case of failed bus ops within this function.
747 * wl1271_prepare_tx_frame retvals won't be returned in order to avoid
748 * triggering recovery by higher layers when not necessary.
749 * In case a FW command fails within wl1271_prepare_tx_frame fails a recovery
750 * will be queued in wl1271_cmd_send. -EAGAIN/-EBUSY from prepare_tx_frame
751 * can occur and are legitimate so don't propagate. -EINVAL will emit a WARNING
752 * within prepare_tx_frame code but there's nothing we should do about those
753 * as well.
754 */
755 int wlcore_tx_work_locked(struct wl1271 *wl)
756 {
757 struct wl12xx_vif *wlvif;
758 struct sk_buff *skb;
759 struct wl1271_tx_hw_descr *desc;
760 u32 buf_offset = 0, last_len = 0;
761 bool sent_packets = false;
762 unsigned long active_hlids[BITS_TO_LONGS(WL12XX_MAX_LINKS)] = {0};
763 int ret = 0;
764 int bus_ret = 0;
765 u8 hlid;
766
767 if (unlikely(wl->state != WLCORE_STATE_ON))
768 return 0;
769
770 while ((skb = wl1271_skb_dequeue(wl, &hlid))) {
771 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
772 bool has_data = false;
773
774 wlvif = NULL;
775 if (!wl12xx_is_dummy_packet(wl, skb))
776 wlvif = wl12xx_vif_to_data(info->control.vif);
777 else
778 hlid = wl->system_hlid;
779
780 has_data = wlvif && wl1271_tx_is_data_present(skb);
781 ret = wl1271_prepare_tx_frame(wl, wlvif, skb, buf_offset,
782 hlid);
783 if (ret == -EAGAIN) {
784 /*
785 * Aggregation buffer is full.
786 * Flush buffer and try again.
787 */
788 wl1271_skb_queue_head(wl, wlvif, skb, hlid);
789
790 buf_offset = wlcore_hw_pre_pkt_send(wl, buf_offset,
791 last_len);
792 bus_ret = wlcore_write_data(wl, REG_SLV_MEM_DATA,
793 wl->aggr_buf, buf_offset, true);
794 if (bus_ret < 0)
795 goto out;
796
797 sent_packets = true;
798 buf_offset = 0;
799 continue;
800 } else if (ret == -EBUSY) {
801 /*
802 * Firmware buffer is full.
803 * Queue back last skb, and stop aggregating.
804 */
805 wl1271_skb_queue_head(wl, wlvif, skb, hlid);
806 /* No work left, avoid scheduling redundant tx work */
807 set_bit(WL1271_FLAG_FW_TX_BUSY, &wl->flags);
808 goto out_ack;
809 } else if (ret < 0) {
810 if (wl12xx_is_dummy_packet(wl, skb))
811 /*
812 * fw still expects dummy packet,
813 * so re-enqueue it
814 */
815 wl1271_skb_queue_head(wl, wlvif, skb, hlid);
816 else
817 ieee80211_free_txskb(wl->hw, skb);
818 goto out_ack;
819 }
820 last_len = ret;
821 buf_offset += last_len;
822 wl->tx_packets_count++;
823 if (has_data) {
824 desc = (struct wl1271_tx_hw_descr *) skb->data;
825 __set_bit(desc->hlid, active_hlids);
826 }
827 }
828
829 out_ack:
830 if (buf_offset) {
831 buf_offset = wlcore_hw_pre_pkt_send(wl, buf_offset, last_len);
832 bus_ret = wlcore_write_data(wl, REG_SLV_MEM_DATA, wl->aggr_buf,
833 buf_offset, true);
834 if (bus_ret < 0)
835 goto out;
836
837 sent_packets = true;
838 }
839 if (sent_packets) {
840 /*
841 * Interrupt the firmware with the new packets. This is only
842 * required for older hardware revisions
843 */
844 if (wl->quirks & WLCORE_QUIRK_END_OF_TRANSACTION) {
845 bus_ret = wlcore_write32(wl, WL12XX_HOST_WR_ACCESS,
846 wl->tx_packets_count);
847 if (bus_ret < 0)
848 goto out;
849 }
850
851 wl1271_handle_tx_low_watermark(wl);
852 }
853 wl12xx_rearm_rx_streaming(wl, active_hlids);
854
855 out:
856 return bus_ret;
857 }
858
859 void wl1271_tx_work(struct work_struct *work)
860 {
861 struct wl1271 *wl = container_of(work, struct wl1271, tx_work);
862 int ret;
863
864 mutex_lock(&wl->mutex);
865 ret = wl1271_ps_elp_wakeup(wl);
866 if (ret < 0)
867 goto out;
868
869 ret = wlcore_tx_work_locked(wl);
870 if (ret < 0) {
871 wl12xx_queue_recovery_work(wl);
872 goto out;
873 }
874
875 wl1271_ps_elp_sleep(wl);
876 out:
877 mutex_unlock(&wl->mutex);
878 }
879
880 static u8 wl1271_tx_get_rate_flags(u8 rate_class_index)
881 {
882 u8 flags = 0;
883
884 /*
885 * TODO: use wl12xx constants when this code is moved to wl12xx, as
886 * only it uses Tx-completion.
887 */
888 if (rate_class_index <= 8)
889 flags |= IEEE80211_TX_RC_MCS;
890
891 /*
892 * TODO: use wl12xx constants when this code is moved to wl12xx, as
893 * only it uses Tx-completion.
894 */
895 if (rate_class_index == 0)
896 flags |= IEEE80211_TX_RC_SHORT_GI;
897
898 return flags;
899 }
900
901 static void wl1271_tx_complete_packet(struct wl1271 *wl,
902 struct wl1271_tx_hw_res_descr *result)
903 {
904 struct ieee80211_tx_info *info;
905 struct ieee80211_vif *vif;
906 struct wl12xx_vif *wlvif;
907 struct sk_buff *skb;
908 int id = result->id;
909 int rate = -1;
910 u8 rate_flags = 0;
911 u8 retries = 0;
912
913 /* check for id legality */
914 if (unlikely(id >= wl->num_tx_desc || wl->tx_frames[id] == NULL)) {
915 wl1271_warning("TX result illegal id: %d", id);
916 return;
917 }
918
919 skb = wl->tx_frames[id];
920 info = IEEE80211_SKB_CB(skb);
921
922 if (wl12xx_is_dummy_packet(wl, skb)) {
923 wl1271_free_tx_id(wl, id);
924 return;
925 }
926
927 /* info->control is valid as long as we don't update info->status */
928 vif = info->control.vif;
929 wlvif = wl12xx_vif_to_data(vif);
930
931 /* update the TX status info */
932 if (result->status == TX_SUCCESS) {
933 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
934 info->flags |= IEEE80211_TX_STAT_ACK;
935 rate = wlcore_rate_to_idx(wl, result->rate_class_index,
936 wlvif->band);
937 rate_flags = wl1271_tx_get_rate_flags(result->rate_class_index);
938 retries = result->ack_failures;
939 } else if (result->status == TX_RETRY_EXCEEDED) {
940 wl->stats.excessive_retries++;
941 retries = result->ack_failures;
942 }
943
944 info->status.rates[0].idx = rate;
945 info->status.rates[0].count = retries;
946 info->status.rates[0].flags = rate_flags;
947 info->status.ack_signal = -1;
948
949 wl->stats.retry_count += result->ack_failures;
950
951 /* remove private header from packet */
952 skb_pull(skb, sizeof(struct wl1271_tx_hw_descr));
953
954 /* remove TKIP header space if present */
955 if ((wl->quirks & WLCORE_QUIRK_TKIP_HEADER_SPACE) &&
956 info->control.hw_key &&
957 info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP) {
958 int hdrlen = ieee80211_get_hdrlen_from_skb(skb);
959 memmove(skb->data + WL1271_EXTRA_SPACE_TKIP, skb->data,
960 hdrlen);
961 skb_pull(skb, WL1271_EXTRA_SPACE_TKIP);
962 }
963
964 wl1271_debug(DEBUG_TX, "tx status id %u skb 0x%p failures %u rate 0x%x"
965 " status 0x%x",
966 result->id, skb, result->ack_failures,
967 result->rate_class_index, result->status);
968
969 /* return the packet to the stack */
970 skb_queue_tail(&wl->deferred_tx_queue, skb);
971 queue_work(wl->freezable_wq, &wl->netstack_work);
972 wl1271_free_tx_id(wl, result->id);
973 }
974
975 /* Called upon reception of a TX complete interrupt */
976 int wlcore_tx_complete(struct wl1271 *wl)
977 {
978 struct wl1271_acx_mem_map *memmap = wl->target_mem_map;
979 u32 count, fw_counter;
980 u32 i;
981 int ret;
982
983 /* read the tx results from the chipset */
984 ret = wlcore_read(wl, le32_to_cpu(memmap->tx_result),
985 wl->tx_res_if, sizeof(*wl->tx_res_if), false);
986 if (ret < 0)
987 goto out;
988
989 fw_counter = le32_to_cpu(wl->tx_res_if->tx_result_fw_counter);
990
991 /* write host counter to chipset (to ack) */
992 ret = wlcore_write32(wl, le32_to_cpu(memmap->tx_result) +
993 offsetof(struct wl1271_tx_hw_res_if,
994 tx_result_host_counter), fw_counter);
995 if (ret < 0)
996 goto out;
997
998 count = fw_counter - wl->tx_results_count;
999 wl1271_debug(DEBUG_TX, "tx_complete received, packets: %d", count);
1000
1001 /* verify that the result buffer is not getting overrun */
1002 if (unlikely(count > TX_HW_RESULT_QUEUE_LEN))
1003 wl1271_warning("TX result overflow from chipset: %d", count);
1004
1005 /* process the results */
1006 for (i = 0; i < count; i++) {
1007 struct wl1271_tx_hw_res_descr *result;
1008 u8 offset = wl->tx_results_count & TX_HW_RESULT_QUEUE_LEN_MASK;
1009
1010 /* process the packet */
1011 result = &(wl->tx_res_if->tx_results_queue[offset]);
1012 wl1271_tx_complete_packet(wl, result);
1013
1014 wl->tx_results_count++;
1015 }
1016
1017 out:
1018 return ret;
1019 }
1020 EXPORT_SYMBOL(wlcore_tx_complete);
1021
1022 void wl1271_tx_reset_link_queues(struct wl1271 *wl, u8 hlid)
1023 {
1024 struct sk_buff *skb;
1025 int i;
1026 unsigned long flags;
1027 struct ieee80211_tx_info *info;
1028 int total[NUM_TX_QUEUES];
1029 struct wl1271_link *lnk = &wl->links[hlid];
1030
1031 for (i = 0; i < NUM_TX_QUEUES; i++) {
1032 total[i] = 0;
1033 while ((skb = skb_dequeue(&lnk->tx_queue[i]))) {
1034 wl1271_debug(DEBUG_TX, "link freeing skb 0x%p", skb);
1035
1036 if (!wl12xx_is_dummy_packet(wl, skb)) {
1037 info = IEEE80211_SKB_CB(skb);
1038 info->status.rates[0].idx = -1;
1039 info->status.rates[0].count = 0;
1040 ieee80211_tx_status_ni(wl->hw, skb);
1041 }
1042
1043 total[i]++;
1044 }
1045 }
1046
1047 spin_lock_irqsave(&wl->wl_lock, flags);
1048 for (i = 0; i < NUM_TX_QUEUES; i++) {
1049 wl->tx_queue_count[i] -= total[i];
1050 if (lnk->wlvif)
1051 lnk->wlvif->tx_queue_count[i] -= total[i];
1052 }
1053 spin_unlock_irqrestore(&wl->wl_lock, flags);
1054
1055 wl1271_handle_tx_low_watermark(wl);
1056 }
1057
1058 /* caller must hold wl->mutex and TX must be stopped */
1059 void wl12xx_tx_reset_wlvif(struct wl1271 *wl, struct wl12xx_vif *wlvif)
1060 {
1061 int i;
1062
1063 /* TX failure */
1064 for_each_set_bit(i, wlvif->links_map, WL12XX_MAX_LINKS) {
1065 if (wlvif->bss_type == BSS_TYPE_AP_BSS &&
1066 i != wlvif->ap.bcast_hlid && i != wlvif->ap.global_hlid) {
1067 /* this calls wl12xx_free_link */
1068 wl1271_free_sta(wl, wlvif, i);
1069 } else {
1070 u8 hlid = i;
1071 wl12xx_free_link(wl, wlvif, &hlid);
1072 }
1073 }
1074 wlvif->last_tx_hlid = 0;
1075
1076 for (i = 0; i < NUM_TX_QUEUES; i++)
1077 wlvif->tx_queue_count[i] = 0;
1078 }
1079 /* caller must hold wl->mutex and TX must be stopped */
1080 void wl12xx_tx_reset(struct wl1271 *wl)
1081 {
1082 int i;
1083 struct sk_buff *skb;
1084 struct ieee80211_tx_info *info;
1085
1086 /* only reset the queues if something bad happened */
1087 if (wl1271_tx_total_queue_count(wl) != 0) {
1088 for (i = 0; i < WL12XX_MAX_LINKS; i++)
1089 wl1271_tx_reset_link_queues(wl, i);
1090
1091 for (i = 0; i < NUM_TX_QUEUES; i++)
1092 wl->tx_queue_count[i] = 0;
1093 }
1094
1095 /*
1096 * Make sure the driver is at a consistent state, in case this
1097 * function is called from a context other than interface removal.
1098 * This call will always wake the TX queues.
1099 */
1100 wl1271_handle_tx_low_watermark(wl);
1101
1102 for (i = 0; i < wl->num_tx_desc; i++) {
1103 if (wl->tx_frames[i] == NULL)
1104 continue;
1105
1106 skb = wl->tx_frames[i];
1107 wl1271_free_tx_id(wl, i);
1108 wl1271_debug(DEBUG_TX, "freeing skb 0x%p", skb);
1109
1110 if (!wl12xx_is_dummy_packet(wl, skb)) {
1111 /*
1112 * Remove private headers before passing the skb to
1113 * mac80211
1114 */
1115 info = IEEE80211_SKB_CB(skb);
1116 skb_pull(skb, sizeof(struct wl1271_tx_hw_descr));
1117 if ((wl->quirks & WLCORE_QUIRK_TKIP_HEADER_SPACE) &&
1118 info->control.hw_key &&
1119 info->control.hw_key->cipher ==
1120 WLAN_CIPHER_SUITE_TKIP) {
1121 int hdrlen = ieee80211_get_hdrlen_from_skb(skb);
1122 memmove(skb->data + WL1271_EXTRA_SPACE_TKIP,
1123 skb->data, hdrlen);
1124 skb_pull(skb, WL1271_EXTRA_SPACE_TKIP);
1125 }
1126
1127 info->status.rates[0].idx = -1;
1128 info->status.rates[0].count = 0;
1129
1130 ieee80211_tx_status_ni(wl->hw, skb);
1131 }
1132 }
1133 }
1134
1135 #define WL1271_TX_FLUSH_TIMEOUT 500000
1136
1137 /* caller must *NOT* hold wl->mutex */
1138 void wl1271_tx_flush(struct wl1271 *wl)
1139 {
1140 unsigned long timeout, start_time;
1141 int i;
1142 start_time = jiffies;
1143 timeout = start_time + usecs_to_jiffies(WL1271_TX_FLUSH_TIMEOUT);
1144
1145 /* only one flush should be in progress, for consistent queue state */
1146 mutex_lock(&wl->flush_mutex);
1147
1148 mutex_lock(&wl->mutex);
1149 if (wl->tx_frames_cnt == 0 && wl1271_tx_total_queue_count(wl) == 0) {
1150 mutex_unlock(&wl->mutex);
1151 goto out;
1152 }
1153
1154 wlcore_stop_queues(wl, WLCORE_QUEUE_STOP_REASON_FLUSH);
1155
1156 while (!time_after(jiffies, timeout)) {
1157 wl1271_debug(DEBUG_MAC80211, "flushing tx buffer: %d %d",
1158 wl->tx_frames_cnt,
1159 wl1271_tx_total_queue_count(wl));
1160
1161 /* force Tx and give the driver some time to flush data */
1162 mutex_unlock(&wl->mutex);
1163 if (wl1271_tx_total_queue_count(wl))
1164 wl1271_tx_work(&wl->tx_work);
1165 msleep(20);
1166 mutex_lock(&wl->mutex);
1167
1168 if ((wl->tx_frames_cnt == 0) &&
1169 (wl1271_tx_total_queue_count(wl) == 0)) {
1170 wl1271_debug(DEBUG_MAC80211, "tx flush took %d ms",
1171 jiffies_to_msecs(jiffies - start_time));
1172 goto out_wake;
1173 }
1174 }
1175
1176 wl1271_warning("Unable to flush all TX buffers, "
1177 "timed out (timeout %d ms",
1178 WL1271_TX_FLUSH_TIMEOUT / 1000);
1179
1180 /* forcibly flush all Tx buffers on our queues */
1181 for (i = 0; i < WL12XX_MAX_LINKS; i++)
1182 wl1271_tx_reset_link_queues(wl, i);
1183
1184 out_wake:
1185 wlcore_wake_queues(wl, WLCORE_QUEUE_STOP_REASON_FLUSH);
1186 mutex_unlock(&wl->mutex);
1187 out:
1188 mutex_unlock(&wl->flush_mutex);
1189 }
1190 EXPORT_SYMBOL_GPL(wl1271_tx_flush);
1191
1192 u32 wl1271_tx_min_rate_get(struct wl1271 *wl, u32 rate_set)
1193 {
1194 if (WARN_ON(!rate_set))
1195 return 0;
1196
1197 return BIT(__ffs(rate_set));
1198 }
1199 EXPORT_SYMBOL_GPL(wl1271_tx_min_rate_get);
1200
1201 void wlcore_stop_queue_locked(struct wl1271 *wl, struct wl12xx_vif *wlvif,
1202 u8 queue, enum wlcore_queue_stop_reason reason)
1203 {
1204 int hwq = wlcore_tx_get_mac80211_queue(wlvif, queue);
1205 bool stopped = !!wl->queue_stop_reasons[hwq];
1206
1207 /* queue should not be stopped for this reason */
1208 WARN_ON_ONCE(test_and_set_bit(reason, &wl->queue_stop_reasons[hwq]));
1209
1210 if (stopped)
1211 return;
1212
1213 ieee80211_stop_queue(wl->hw, hwq);
1214 }
1215
1216 void wlcore_stop_queue(struct wl1271 *wl, struct wl12xx_vif *wlvif, u8 queue,
1217 enum wlcore_queue_stop_reason reason)
1218 {
1219 unsigned long flags;
1220
1221 spin_lock_irqsave(&wl->wl_lock, flags);
1222 wlcore_stop_queue_locked(wl, wlvif, queue, reason);
1223 spin_unlock_irqrestore(&wl->wl_lock, flags);
1224 }
1225
1226 void wlcore_wake_queue(struct wl1271 *wl, struct wl12xx_vif *wlvif, u8 queue,
1227 enum wlcore_queue_stop_reason reason)
1228 {
1229 unsigned long flags;
1230 int hwq = wlcore_tx_get_mac80211_queue(wlvif, queue);
1231
1232 spin_lock_irqsave(&wl->wl_lock, flags);
1233
1234 /* queue should not be clear for this reason */
1235 WARN_ON_ONCE(!test_and_clear_bit(reason, &wl->queue_stop_reasons[hwq]));
1236
1237 if (wl->queue_stop_reasons[hwq])
1238 goto out;
1239
1240 ieee80211_wake_queue(wl->hw, hwq);
1241
1242 out:
1243 spin_unlock_irqrestore(&wl->wl_lock, flags);
1244 }
1245
1246 void wlcore_stop_queues(struct wl1271 *wl,
1247 enum wlcore_queue_stop_reason reason)
1248 {
1249 int i;
1250 unsigned long flags;
1251
1252 spin_lock_irqsave(&wl->wl_lock, flags);
1253
1254 /* mark all possible queues as stopped */
1255 for (i = 0; i < WLCORE_NUM_MAC_ADDRESSES * NUM_TX_QUEUES; i++)
1256 WARN_ON_ONCE(test_and_set_bit(reason,
1257 &wl->queue_stop_reasons[i]));
1258
1259 /* use the global version to make sure all vifs in mac80211 we don't
1260 * know are stopped.
1261 */
1262 ieee80211_stop_queues(wl->hw);
1263
1264 spin_unlock_irqrestore(&wl->wl_lock, flags);
1265 }
1266
1267 void wlcore_wake_queues(struct wl1271 *wl,
1268 enum wlcore_queue_stop_reason reason)
1269 {
1270 int i;
1271 unsigned long flags;
1272
1273 spin_lock_irqsave(&wl->wl_lock, flags);
1274
1275 /* mark all possible queues as awake */
1276 for (i = 0; i < WLCORE_NUM_MAC_ADDRESSES * NUM_TX_QUEUES; i++)
1277 WARN_ON_ONCE(!test_and_clear_bit(reason,
1278 &wl->queue_stop_reasons[i]));
1279
1280 /* use the global version to make sure all vifs in mac80211 we don't
1281 * know are woken up.
1282 */
1283 ieee80211_wake_queues(wl->hw);
1284
1285 spin_unlock_irqrestore(&wl->wl_lock, flags);
1286 }
1287
1288 bool wlcore_is_queue_stopped_by_reason(struct wl1271 *wl,
1289 struct wl12xx_vif *wlvif, u8 queue,
1290 enum wlcore_queue_stop_reason reason)
1291 {
1292 unsigned long flags;
1293 bool stopped;
1294
1295 spin_lock_irqsave(&wl->wl_lock, flags);
1296 stopped = wlcore_is_queue_stopped_by_reason_locked(wl, wlvif, queue,
1297 reason);
1298 spin_unlock_irqrestore(&wl->wl_lock, flags);
1299
1300 return stopped;
1301 }
1302
1303 bool wlcore_is_queue_stopped_by_reason_locked(struct wl1271 *wl,
1304 struct wl12xx_vif *wlvif, u8 queue,
1305 enum wlcore_queue_stop_reason reason)
1306 {
1307 int hwq = wlcore_tx_get_mac80211_queue(wlvif, queue);
1308
1309 assert_spin_locked(&wl->wl_lock);
1310 return test_bit(reason, &wl->queue_stop_reasons[hwq]);
1311 }
1312
1313 bool wlcore_is_queue_stopped_locked(struct wl1271 *wl, struct wl12xx_vif *wlvif,
1314 u8 queue)
1315 {
1316 int hwq = wlcore_tx_get_mac80211_queue(wlvif, queue);
1317
1318 assert_spin_locked(&wl->wl_lock);
1319 return !!wl->queue_stop_reasons[hwq];
1320 }
Linux with added FPC-III support