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40b43115f83590b6a6cb4a38d8283e7b78460187
[deliverable/linux.git] / drivers / net / wireless / ti / wlcore / tx.c
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, wlvif, 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 2*ap_count + 1 active links,
138 * since we must account for the global and broadcast AP links
139 * for each AP. The "fw_ps" check assures us the other link is a STA
140 * connected to the AP. Otherwise the FW would not set the PSM bit.
141 */
142 if (wl->active_link_count > (wl->ap_count*2 + 1) && 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 /*
238 * If the FW was empty before, arm the Tx watchdog. Also do
239 * this on the first Tx after resume, as we always cancel the
240 * watchdog on suspend.
241 */
242 if (wl->tx_allocated_blocks == total_blocks ||
243 test_and_clear_bit(WL1271_FLAG_REINIT_TX_WDOG, &wl->flags))
244 wl12xx_rearm_tx_watchdog_locked(wl);
245
246 ac = wl1271_tx_get_queue(skb_get_queue_mapping(skb));
247 wl->tx_allocated_pkts[ac]++;
248
249 if (test_bit(hlid, wl->links_map))
250 wl->links[hlid].allocated_pkts++;
251
252 ret = 0;
253
254 wl1271_debug(DEBUG_TX,
255 "tx_allocate: size: %d, blocks: %d, id: %d",
256 total_len, total_blocks, id);
257 } else {
258 wl1271_free_tx_id(wl, id);
259 }
260
261 return ret;
262 }
263
264 static void wl1271_tx_fill_hdr(struct wl1271 *wl, struct wl12xx_vif *wlvif,
265 struct sk_buff *skb, u32 extra,
266 struct ieee80211_tx_info *control, u8 hlid)
267 {
268 struct timespec ts;
269 struct wl1271_tx_hw_descr *desc;
270 int ac, rate_idx;
271 s64 hosttime;
272 u16 tx_attr = 0;
273 __le16 frame_control;
274 struct ieee80211_hdr *hdr;
275 u8 *frame_start;
276 bool is_dummy;
277
278 desc = (struct wl1271_tx_hw_descr *) skb->data;
279 frame_start = (u8 *)(desc + 1);
280 hdr = (struct ieee80211_hdr *)(frame_start + extra);
281 frame_control = hdr->frame_control;
282
283 /* relocate space for security header */
284 if (extra) {
285 int hdrlen = ieee80211_hdrlen(frame_control);
286 memmove(frame_start, hdr, hdrlen);
287 skb_set_network_header(skb, skb_network_offset(skb) + extra);
288 }
289
290 /* configure packet life time */
291 getnstimeofday(&ts);
292 hosttime = (timespec_to_ns(&ts) >> 10);
293 desc->start_time = cpu_to_le32(hosttime - wl->time_offset);
294
295 is_dummy = wl12xx_is_dummy_packet(wl, skb);
296 if (is_dummy || !wlvif || wlvif->bss_type != BSS_TYPE_AP_BSS)
297 desc->life_time = cpu_to_le16(TX_HW_MGMT_PKT_LIFETIME_TU);
298 else
299 desc->life_time = cpu_to_le16(TX_HW_AP_MODE_PKT_LIFETIME_TU);
300
301 /* queue */
302 ac = wl1271_tx_get_queue(skb_get_queue_mapping(skb));
303 desc->tid = skb->priority;
304
305 if (is_dummy) {
306 /*
307 * FW expects the dummy packet to have an invalid session id -
308 * any session id that is different than the one set in the join
309 */
310 tx_attr = (SESSION_COUNTER_INVALID <<
311 TX_HW_ATTR_OFST_SESSION_COUNTER) &
312 TX_HW_ATTR_SESSION_COUNTER;
313
314 tx_attr |= TX_HW_ATTR_TX_DUMMY_REQ;
315 } else if (wlvif) {
316 u8 session_id = wl->session_ids[hlid];
317
318 if ((wl->quirks & WLCORE_QUIRK_AP_ZERO_SESSION_ID) &&
319 (wlvif->bss_type == BSS_TYPE_AP_BSS))
320 session_id = 0;
321
322 /* configure the tx attributes */
323 tx_attr = session_id << TX_HW_ATTR_OFST_SESSION_COUNTER;
324 }
325
326 desc->hlid = hlid;
327 if (is_dummy || !wlvif)
328 rate_idx = 0;
329 else if (wlvif->bss_type != BSS_TYPE_AP_BSS) {
330 /*
331 * if the packets are data packets
332 * send them with AP rate policies (EAPOLs are an exception),
333 * otherwise use default basic rates
334 */
335 if (skb->protocol == cpu_to_be16(ETH_P_PAE))
336 rate_idx = wlvif->sta.basic_rate_idx;
337 else if (control->flags & IEEE80211_TX_CTL_NO_CCK_RATE)
338 rate_idx = wlvif->sta.p2p_rate_idx;
339 else if (ieee80211_is_data(frame_control))
340 rate_idx = wlvif->sta.ap_rate_idx;
341 else
342 rate_idx = wlvif->sta.basic_rate_idx;
343 } else {
344 if (hlid == wlvif->ap.global_hlid)
345 rate_idx = wlvif->ap.mgmt_rate_idx;
346 else if (hlid == wlvif->ap.bcast_hlid ||
347 skb->protocol == cpu_to_be16(ETH_P_PAE) ||
348 !ieee80211_is_data(frame_control))
349 /*
350 * send non-data, bcast and EAPOLs using the
351 * min basic rate
352 */
353 rate_idx = wlvif->ap.bcast_rate_idx;
354 else
355 rate_idx = wlvif->ap.ucast_rate_idx[ac];
356 }
357
358 tx_attr |= rate_idx << TX_HW_ATTR_OFST_RATE_POLICY;
359
360 /* for WEP shared auth - no fw encryption is needed */
361 if (ieee80211_is_auth(frame_control) &&
362 ieee80211_has_protected(frame_control))
363 tx_attr |= TX_HW_ATTR_HOST_ENCRYPT;
364
365 /* send EAPOL frames as voice */
366 if (control->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO)
367 tx_attr |= TX_HW_ATTR_EAPOL_FRAME;
368
369 desc->tx_attr = cpu_to_le16(tx_attr);
370
371 wlcore_hw_set_tx_desc_csum(wl, desc, skb);
372 wlcore_hw_set_tx_desc_data_len(wl, desc, skb);
373 }
374
375 /* caller must hold wl->mutex */
376 static int wl1271_prepare_tx_frame(struct wl1271 *wl, struct wl12xx_vif *wlvif,
377 struct sk_buff *skb, u32 buf_offset, u8 hlid)
378 {
379 struct ieee80211_tx_info *info;
380 u32 extra = 0;
381 int ret = 0;
382 u32 total_len;
383 bool is_dummy;
384 bool is_gem = false;
385
386 if (!skb) {
387 wl1271_error("discarding null skb");
388 return -EINVAL;
389 }
390
391 if (hlid == WL12XX_INVALID_LINK_ID) {
392 wl1271_error("invalid hlid. dropping skb 0x%p", skb);
393 return -EINVAL;
394 }
395
396 info = IEEE80211_SKB_CB(skb);
397
398 is_dummy = wl12xx_is_dummy_packet(wl, skb);
399
400 if ((wl->quirks & WLCORE_QUIRK_TKIP_HEADER_SPACE) &&
401 info->control.hw_key &&
402 info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP)
403 extra = WL1271_EXTRA_SPACE_TKIP;
404
405 if (info->control.hw_key) {
406 bool is_wep;
407 u8 idx = info->control.hw_key->hw_key_idx;
408 u32 cipher = info->control.hw_key->cipher;
409
410 is_wep = (cipher == WLAN_CIPHER_SUITE_WEP40) ||
411 (cipher == WLAN_CIPHER_SUITE_WEP104);
412
413 if (WARN_ON(is_wep && wlvif && wlvif->default_key != idx)) {
414 ret = wl1271_set_default_wep_key(wl, wlvif, idx);
415 if (ret < 0)
416 return ret;
417 wlvif->default_key = idx;
418 }
419
420 is_gem = (cipher == WL1271_CIPHER_SUITE_GEM);
421 }
422
423 ret = wl1271_tx_allocate(wl, wlvif, skb, extra, buf_offset, hlid,
424 is_gem);
425 if (ret < 0)
426 return ret;
427
428 wl1271_tx_fill_hdr(wl, wlvif, skb, extra, info, hlid);
429
430 if (!is_dummy && wlvif && wlvif->bss_type == BSS_TYPE_AP_BSS) {
431 wl1271_tx_ap_update_inconnection_sta(wl, wlvif, skb);
432 wl1271_tx_regulate_link(wl, wlvif, hlid);
433 }
434
435 /*
436 * The length of each packet is stored in terms of
437 * words. Thus, we must pad the skb data to make sure its
438 * length is aligned. The number of padding bytes is computed
439 * and set in wl1271_tx_fill_hdr.
440 * In special cases, we want to align to a specific block size
441 * (eg. for wl128x with SDIO we align to 256).
442 */
443 total_len = wlcore_calc_packet_alignment(wl, skb->len);
444
445 memcpy(wl->aggr_buf + buf_offset, skb->data, skb->len);
446 memset(wl->aggr_buf + buf_offset + skb->len, 0, total_len - skb->len);
447
448 /* Revert side effects in the dummy packet skb, so it can be reused */
449 if (is_dummy)
450 skb_pull(skb, sizeof(struct wl1271_tx_hw_descr));
451
452 return total_len;
453 }
454
455 u32 wl1271_tx_enabled_rates_get(struct wl1271 *wl, u32 rate_set,
456 enum ieee80211_band rate_band)
457 {
458 struct ieee80211_supported_band *band;
459 u32 enabled_rates = 0;
460 int bit;
461
462 band = wl->hw->wiphy->bands[rate_band];
463 for (bit = 0; bit < band->n_bitrates; bit++) {
464 if (rate_set & 0x1)
465 enabled_rates |= band->bitrates[bit].hw_value;
466 rate_set >>= 1;
467 }
468
469 /* MCS rates indication are on bits 16 - 31 */
470 rate_set >>= HW_HT_RATES_OFFSET - band->n_bitrates;
471
472 for (bit = 0; bit < 16; bit++) {
473 if (rate_set & 0x1)
474 enabled_rates |= (CONF_HW_BIT_RATE_MCS_0 << bit);
475 rate_set >>= 1;
476 }
477
478 return enabled_rates;
479 }
480
481 void wl1271_handle_tx_low_watermark(struct wl1271 *wl)
482 {
483 int i;
484 struct wl12xx_vif *wlvif;
485
486 wl12xx_for_each_wlvif(wl, wlvif) {
487 for (i = 0; i < NUM_TX_QUEUES; i++) {
488 if (wlcore_is_queue_stopped_by_reason(wl, wlvif, i,
489 WLCORE_QUEUE_STOP_REASON_WATERMARK) &&
490 wlvif->tx_queue_count[i] <=
491 WL1271_TX_QUEUE_LOW_WATERMARK)
492 /* firmware buffer has space, restart queues */
493 wlcore_wake_queue(wl, wlvif, i,
494 WLCORE_QUEUE_STOP_REASON_WATERMARK);
495 }
496 }
497 }
498
499 static int wlcore_select_ac(struct wl1271 *wl)
500 {
501 int i, q = -1, ac;
502 u32 min_pkts = 0xffffffff;
503
504 /*
505 * Find a non-empty ac where:
506 * 1. There are packets to transmit
507 * 2. The FW has the least allocated blocks
508 *
509 * We prioritize the ACs according to VO>VI>BE>BK
510 */
511 for (i = 0; i < NUM_TX_QUEUES; i++) {
512 ac = wl1271_tx_get_queue(i);
513 if (wl->tx_queue_count[ac] &&
514 wl->tx_allocated_pkts[ac] < min_pkts) {
515 q = ac;
516 min_pkts = wl->tx_allocated_pkts[q];
517 }
518 }
519
520 return q;
521 }
522
523 static struct sk_buff *wlcore_lnk_dequeue(struct wl1271 *wl,
524 struct wl1271_link *lnk, u8 q)
525 {
526 struct sk_buff *skb;
527 unsigned long flags;
528
529 skb = skb_dequeue(&lnk->tx_queue[q]);
530 if (skb) {
531 spin_lock_irqsave(&wl->wl_lock, flags);
532 WARN_ON_ONCE(wl->tx_queue_count[q] <= 0);
533 wl->tx_queue_count[q]--;
534 if (lnk->wlvif) {
535 WARN_ON_ONCE(lnk->wlvif->tx_queue_count[q] <= 0);
536 lnk->wlvif->tx_queue_count[q]--;
537 }
538 spin_unlock_irqrestore(&wl->wl_lock, flags);
539 }
540
541 return skb;
542 }
543
544 static struct sk_buff *wlcore_lnk_dequeue_high_prio(struct wl1271 *wl,
545 u8 hlid, u8 ac,
546 u8 *low_prio_hlid)
547 {
548 struct wl1271_link *lnk = &wl->links[hlid];
549
550 if (!wlcore_hw_lnk_high_prio(wl, hlid, lnk)) {
551 if (*low_prio_hlid == WL12XX_INVALID_LINK_ID &&
552 !skb_queue_empty(&lnk->tx_queue[ac]) &&
553 wlcore_hw_lnk_low_prio(wl, hlid, lnk))
554 /* we found the first non-empty low priority queue */
555 *low_prio_hlid = hlid;
556
557 return NULL;
558 }
559
560 return wlcore_lnk_dequeue(wl, lnk, ac);
561 }
562
563 static struct sk_buff *wlcore_vif_dequeue_high_prio(struct wl1271 *wl,
564 struct wl12xx_vif *wlvif,
565 u8 ac, u8 *hlid,
566 u8 *low_prio_hlid)
567 {
568 struct sk_buff *skb = NULL;
569 int i, h, start_hlid;
570
571 /* start from the link after the last one */
572 start_hlid = (wlvif->last_tx_hlid + 1) % wl->num_links;
573
574 /* dequeue according to AC, round robin on each link */
575 for (i = 0; i < wl->num_links; i++) {
576 h = (start_hlid + i) % wl->num_links;
577
578 /* only consider connected stations */
579 if (!test_bit(h, wlvif->links_map))
580 continue;
581
582 skb = wlcore_lnk_dequeue_high_prio(wl, h, ac,
583 low_prio_hlid);
584 if (!skb)
585 continue;
586
587 wlvif->last_tx_hlid = h;
588 break;
589 }
590
591 if (!skb)
592 wlvif->last_tx_hlid = 0;
593
594 *hlid = wlvif->last_tx_hlid;
595 return skb;
596 }
597
598 static struct sk_buff *wl1271_skb_dequeue(struct wl1271 *wl, u8 *hlid)
599 {
600 unsigned long flags;
601 struct wl12xx_vif *wlvif = wl->last_wlvif;
602 struct sk_buff *skb = NULL;
603 int ac;
604 u8 low_prio_hlid = WL12XX_INVALID_LINK_ID;
605
606 ac = wlcore_select_ac(wl);
607 if (ac < 0)
608 goto out;
609
610 /* continue from last wlvif (round robin) */
611 if (wlvif) {
612 wl12xx_for_each_wlvif_continue(wl, wlvif) {
613 if (!wlvif->tx_queue_count[ac])
614 continue;
615
616 skb = wlcore_vif_dequeue_high_prio(wl, wlvif, ac, hlid,
617 &low_prio_hlid);
618 if (!skb)
619 continue;
620
621 wl->last_wlvif = wlvif;
622 break;
623 }
624 }
625
626 /* dequeue from the system HLID before the restarting wlvif list */
627 if (!skb) {
628 skb = wlcore_lnk_dequeue_high_prio(wl, wl->system_hlid,
629 ac, &low_prio_hlid);
630 if (skb) {
631 *hlid = wl->system_hlid;
632 wl->last_wlvif = NULL;
633 }
634 }
635
636 /* Do a new pass over the wlvif list. But no need to continue
637 * after last_wlvif. The previous pass should have found it. */
638 if (!skb) {
639 wl12xx_for_each_wlvif(wl, wlvif) {
640 if (!wlvif->tx_queue_count[ac])
641 goto next;
642
643 skb = wlcore_vif_dequeue_high_prio(wl, wlvif, ac, hlid,
644 &low_prio_hlid);
645 if (skb) {
646 wl->last_wlvif = wlvif;
647 break;
648 }
649
650 next:
651 if (wlvif == wl->last_wlvif)
652 break;
653 }
654 }
655
656 /* no high priority skbs found - but maybe a low priority one? */
657 if (!skb && low_prio_hlid != WL12XX_INVALID_LINK_ID) {
658 struct wl1271_link *lnk = &wl->links[low_prio_hlid];
659 skb = wlcore_lnk_dequeue(wl, lnk, ac);
660
661 WARN_ON(!skb); /* we checked this before */
662 *hlid = low_prio_hlid;
663
664 /* ensure proper round robin in the vif/link levels */
665 wl->last_wlvif = lnk->wlvif;
666 if (lnk->wlvif)
667 lnk->wlvif->last_tx_hlid = low_prio_hlid;
668
669 }
670
671 out:
672 if (!skb &&
673 test_and_clear_bit(WL1271_FLAG_DUMMY_PACKET_PENDING, &wl->flags)) {
674 int q;
675
676 skb = wl->dummy_packet;
677 *hlid = wl->system_hlid;
678 q = wl1271_tx_get_queue(skb_get_queue_mapping(skb));
679 spin_lock_irqsave(&wl->wl_lock, flags);
680 WARN_ON_ONCE(wl->tx_queue_count[q] <= 0);
681 wl->tx_queue_count[q]--;
682 spin_unlock_irqrestore(&wl->wl_lock, flags);
683 }
684
685 return skb;
686 }
687
688 static void wl1271_skb_queue_head(struct wl1271 *wl, struct wl12xx_vif *wlvif,
689 struct sk_buff *skb, u8 hlid)
690 {
691 unsigned long flags;
692 int q = wl1271_tx_get_queue(skb_get_queue_mapping(skb));
693
694 if (wl12xx_is_dummy_packet(wl, skb)) {
695 set_bit(WL1271_FLAG_DUMMY_PACKET_PENDING, &wl->flags);
696 } else {
697 skb_queue_head(&wl->links[hlid].tx_queue[q], skb);
698
699 /* make sure we dequeue the same packet next time */
700 wlvif->last_tx_hlid = (hlid + wl->num_links - 1) %
701 wl->num_links;
702 }
703
704 spin_lock_irqsave(&wl->wl_lock, flags);
705 wl->tx_queue_count[q]++;
706 if (wlvif)
707 wlvif->tx_queue_count[q]++;
708 spin_unlock_irqrestore(&wl->wl_lock, flags);
709 }
710
711 static bool wl1271_tx_is_data_present(struct sk_buff *skb)
712 {
713 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
714
715 return ieee80211_is_data_present(hdr->frame_control);
716 }
717
718 void wl12xx_rearm_rx_streaming(struct wl1271 *wl, unsigned long *active_hlids)
719 {
720 struct wl12xx_vif *wlvif;
721 u32 timeout;
722 u8 hlid;
723
724 if (!wl->conf.rx_streaming.interval)
725 return;
726
727 if (!wl->conf.rx_streaming.always &&
728 !test_bit(WL1271_FLAG_SOFT_GEMINI, &wl->flags))
729 return;
730
731 timeout = wl->conf.rx_streaming.duration;
732 wl12xx_for_each_wlvif_sta(wl, wlvif) {
733 bool found = false;
734 for_each_set_bit(hlid, active_hlids, wl->num_links) {
735 if (test_bit(hlid, wlvif->links_map)) {
736 found = true;
737 break;
738 }
739 }
740
741 if (!found)
742 continue;
743
744 /* enable rx streaming */
745 if (!test_bit(WLVIF_FLAG_RX_STREAMING_STARTED, &wlvif->flags))
746 ieee80211_queue_work(wl->hw,
747 &wlvif->rx_streaming_enable_work);
748
749 mod_timer(&wlvif->rx_streaming_timer,
750 jiffies + msecs_to_jiffies(timeout));
751 }
752 }
753
754 /*
755 * Returns failure values only in case of failed bus ops within this function.
756 * wl1271_prepare_tx_frame retvals won't be returned in order to avoid
757 * triggering recovery by higher layers when not necessary.
758 * In case a FW command fails within wl1271_prepare_tx_frame fails a recovery
759 * will be queued in wl1271_cmd_send. -EAGAIN/-EBUSY from prepare_tx_frame
760 * can occur and are legitimate so don't propagate. -EINVAL will emit a WARNING
761 * within prepare_tx_frame code but there's nothing we should do about those
762 * as well.
763 */
764 int wlcore_tx_work_locked(struct wl1271 *wl)
765 {
766 struct wl12xx_vif *wlvif;
767 struct sk_buff *skb;
768 struct wl1271_tx_hw_descr *desc;
769 u32 buf_offset = 0, last_len = 0;
770 bool sent_packets = false;
771 unsigned long active_hlids[BITS_TO_LONGS(WLCORE_MAX_LINKS)] = {0};
772 int ret = 0;
773 int bus_ret = 0;
774 u8 hlid;
775
776 if (unlikely(wl->state != WLCORE_STATE_ON))
777 return 0;
778
779 while ((skb = wl1271_skb_dequeue(wl, &hlid))) {
780 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
781 bool has_data = false;
782
783 wlvif = NULL;
784 if (!wl12xx_is_dummy_packet(wl, skb))
785 wlvif = wl12xx_vif_to_data(info->control.vif);
786 else
787 hlid = wl->system_hlid;
788
789 has_data = wlvif && wl1271_tx_is_data_present(skb);
790 ret = wl1271_prepare_tx_frame(wl, wlvif, skb, buf_offset,
791 hlid);
792 if (ret == -EAGAIN) {
793 /*
794 * Aggregation buffer is full.
795 * Flush buffer and try again.
796 */
797 wl1271_skb_queue_head(wl, wlvif, skb, hlid);
798
799 buf_offset = wlcore_hw_pre_pkt_send(wl, buf_offset,
800 last_len);
801 bus_ret = wlcore_write_data(wl, REG_SLV_MEM_DATA,
802 wl->aggr_buf, buf_offset, true);
803 if (bus_ret < 0)
804 goto out;
805
806 sent_packets = true;
807 buf_offset = 0;
808 continue;
809 } else if (ret == -EBUSY) {
810 /*
811 * Firmware buffer is full.
812 * Queue back last skb, and stop aggregating.
813 */
814 wl1271_skb_queue_head(wl, wlvif, skb, hlid);
815 /* No work left, avoid scheduling redundant tx work */
816 set_bit(WL1271_FLAG_FW_TX_BUSY, &wl->flags);
817 goto out_ack;
818 } else if (ret < 0) {
819 if (wl12xx_is_dummy_packet(wl, skb))
820 /*
821 * fw still expects dummy packet,
822 * so re-enqueue it
823 */
824 wl1271_skb_queue_head(wl, wlvif, skb, hlid);
825 else
826 ieee80211_free_txskb(wl->hw, skb);
827 goto out_ack;
828 }
829 last_len = ret;
830 buf_offset += last_len;
831 wl->tx_packets_count++;
832 if (has_data) {
833 desc = (struct wl1271_tx_hw_descr *) skb->data;
834 __set_bit(desc->hlid, active_hlids);
835 }
836 }
837
838 out_ack:
839 if (buf_offset) {
840 buf_offset = wlcore_hw_pre_pkt_send(wl, buf_offset, last_len);
841 bus_ret = wlcore_write_data(wl, REG_SLV_MEM_DATA, wl->aggr_buf,
842 buf_offset, true);
843 if (bus_ret < 0)
844 goto out;
845
846 sent_packets = true;
847 }
848 if (sent_packets) {
849 /*
850 * Interrupt the firmware with the new packets. This is only
851 * required for older hardware revisions
852 */
853 if (wl->quirks & WLCORE_QUIRK_END_OF_TRANSACTION) {
854 bus_ret = wlcore_write32(wl, WL12XX_HOST_WR_ACCESS,
855 wl->tx_packets_count);
856 if (bus_ret < 0)
857 goto out;
858 }
859
860 wl1271_handle_tx_low_watermark(wl);
861 }
862 wl12xx_rearm_rx_streaming(wl, active_hlids);
863
864 out:
865 return bus_ret;
866 }
867
868 void wl1271_tx_work(struct work_struct *work)
869 {
870 struct wl1271 *wl = container_of(work, struct wl1271, tx_work);
871 int ret;
872
873 mutex_lock(&wl->mutex);
874 ret = wl1271_ps_elp_wakeup(wl);
875 if (ret < 0)
876 goto out;
877
878 ret = wlcore_tx_work_locked(wl);
879 if (ret < 0) {
880 wl12xx_queue_recovery_work(wl);
881 goto out;
882 }
883
884 wl1271_ps_elp_sleep(wl);
885 out:
886 mutex_unlock(&wl->mutex);
887 }
888
889 static u8 wl1271_tx_get_rate_flags(u8 rate_class_index)
890 {
891 u8 flags = 0;
892
893 /*
894 * TODO: use wl12xx constants when this code is moved to wl12xx, as
895 * only it uses Tx-completion.
896 */
897 if (rate_class_index <= 8)
898 flags |= IEEE80211_TX_RC_MCS;
899
900 /*
901 * TODO: use wl12xx constants when this code is moved to wl12xx, as
902 * only it uses Tx-completion.
903 */
904 if (rate_class_index == 0)
905 flags |= IEEE80211_TX_RC_SHORT_GI;
906
907 return flags;
908 }
909
910 static void wl1271_tx_complete_packet(struct wl1271 *wl,
911 struct wl1271_tx_hw_res_descr *result)
912 {
913 struct ieee80211_tx_info *info;
914 struct ieee80211_vif *vif;
915 struct wl12xx_vif *wlvif;
916 struct sk_buff *skb;
917 int id = result->id;
918 int rate = -1;
919 u8 rate_flags = 0;
920 u8 retries = 0;
921
922 /* check for id legality */
923 if (unlikely(id >= wl->num_tx_desc || wl->tx_frames[id] == NULL)) {
924 wl1271_warning("TX result illegal id: %d", id);
925 return;
926 }
927
928 skb = wl->tx_frames[id];
929 info = IEEE80211_SKB_CB(skb);
930
931 if (wl12xx_is_dummy_packet(wl, skb)) {
932 wl1271_free_tx_id(wl, id);
933 return;
934 }
935
936 /* info->control is valid as long as we don't update info->status */
937 vif = info->control.vif;
938 wlvif = wl12xx_vif_to_data(vif);
939
940 /* update the TX status info */
941 if (result->status == TX_SUCCESS) {
942 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
943 info->flags |= IEEE80211_TX_STAT_ACK;
944 rate = wlcore_rate_to_idx(wl, result->rate_class_index,
945 wlvif->band);
946 rate_flags = wl1271_tx_get_rate_flags(result->rate_class_index);
947 retries = result->ack_failures;
948 } else if (result->status == TX_RETRY_EXCEEDED) {
949 wl->stats.excessive_retries++;
950 retries = result->ack_failures;
951 }
952
953 info->status.rates[0].idx = rate;
954 info->status.rates[0].count = retries;
955 info->status.rates[0].flags = rate_flags;
956 info->status.ack_signal = -1;
957
958 wl->stats.retry_count += result->ack_failures;
959
960 /* remove private header from packet */
961 skb_pull(skb, sizeof(struct wl1271_tx_hw_descr));
962
963 /* remove TKIP header space if present */
964 if ((wl->quirks & WLCORE_QUIRK_TKIP_HEADER_SPACE) &&
965 info->control.hw_key &&
966 info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP) {
967 int hdrlen = ieee80211_get_hdrlen_from_skb(skb);
968 memmove(skb->data + WL1271_EXTRA_SPACE_TKIP, skb->data,
969 hdrlen);
970 skb_pull(skb, WL1271_EXTRA_SPACE_TKIP);
971 }
972
973 wl1271_debug(DEBUG_TX, "tx status id %u skb 0x%p failures %u rate 0x%x"
974 " status 0x%x",
975 result->id, skb, result->ack_failures,
976 result->rate_class_index, result->status);
977
978 /* return the packet to the stack */
979 skb_queue_tail(&wl->deferred_tx_queue, skb);
980 queue_work(wl->freezable_wq, &wl->netstack_work);
981 wl1271_free_tx_id(wl, result->id);
982 }
983
984 /* Called upon reception of a TX complete interrupt */
985 int wlcore_tx_complete(struct wl1271 *wl)
986 {
987 struct wl1271_acx_mem_map *memmap = wl->target_mem_map;
988 u32 count, fw_counter;
989 u32 i;
990 int ret;
991
992 /* read the tx results from the chipset */
993 ret = wlcore_read(wl, le32_to_cpu(memmap->tx_result),
994 wl->tx_res_if, sizeof(*wl->tx_res_if), false);
995 if (ret < 0)
996 goto out;
997
998 fw_counter = le32_to_cpu(wl->tx_res_if->tx_result_fw_counter);
999
1000 /* write host counter to chipset (to ack) */
1001 ret = wlcore_write32(wl, le32_to_cpu(memmap->tx_result) +
1002 offsetof(struct wl1271_tx_hw_res_if,
1003 tx_result_host_counter), fw_counter);
1004 if (ret < 0)
1005 goto out;
1006
1007 count = fw_counter - wl->tx_results_count;
1008 wl1271_debug(DEBUG_TX, "tx_complete received, packets: %d", count);
1009
1010 /* verify that the result buffer is not getting overrun */
1011 if (unlikely(count > TX_HW_RESULT_QUEUE_LEN))
1012 wl1271_warning("TX result overflow from chipset: %d", count);
1013
1014 /* process the results */
1015 for (i = 0; i < count; i++) {
1016 struct wl1271_tx_hw_res_descr *result;
1017 u8 offset = wl->tx_results_count & TX_HW_RESULT_QUEUE_LEN_MASK;
1018
1019 /* process the packet */
1020 result = &(wl->tx_res_if->tx_results_queue[offset]);
1021 wl1271_tx_complete_packet(wl, result);
1022
1023 wl->tx_results_count++;
1024 }
1025
1026 out:
1027 return ret;
1028 }
1029 EXPORT_SYMBOL(wlcore_tx_complete);
1030
1031 void wl1271_tx_reset_link_queues(struct wl1271 *wl, u8 hlid)
1032 {
1033 struct sk_buff *skb;
1034 int i;
1035 unsigned long flags;
1036 struct ieee80211_tx_info *info;
1037 int total[NUM_TX_QUEUES];
1038 struct wl1271_link *lnk = &wl->links[hlid];
1039
1040 for (i = 0; i < NUM_TX_QUEUES; i++) {
1041 total[i] = 0;
1042 while ((skb = skb_dequeue(&lnk->tx_queue[i]))) {
1043 wl1271_debug(DEBUG_TX, "link freeing skb 0x%p", skb);
1044
1045 if (!wl12xx_is_dummy_packet(wl, skb)) {
1046 info = IEEE80211_SKB_CB(skb);
1047 info->status.rates[0].idx = -1;
1048 info->status.rates[0].count = 0;
1049 ieee80211_tx_status_ni(wl->hw, skb);
1050 }
1051
1052 total[i]++;
1053 }
1054 }
1055
1056 spin_lock_irqsave(&wl->wl_lock, flags);
1057 for (i = 0; i < NUM_TX_QUEUES; i++) {
1058 wl->tx_queue_count[i] -= total[i];
1059 if (lnk->wlvif)
1060 lnk->wlvif->tx_queue_count[i] -= total[i];
1061 }
1062 spin_unlock_irqrestore(&wl->wl_lock, flags);
1063
1064 wl1271_handle_tx_low_watermark(wl);
1065 }
1066
1067 /* caller must hold wl->mutex and TX must be stopped */
1068 void wl12xx_tx_reset_wlvif(struct wl1271 *wl, struct wl12xx_vif *wlvif)
1069 {
1070 int i;
1071
1072 /* TX failure */
1073 for_each_set_bit(i, wlvif->links_map, wl->num_links) {
1074 if (wlvif->bss_type == BSS_TYPE_AP_BSS &&
1075 i != wlvif->ap.bcast_hlid && i != wlvif->ap.global_hlid) {
1076 /* this calls wl12xx_free_link */
1077 wl1271_free_sta(wl, wlvif, i);
1078 } else {
1079 u8 hlid = i;
1080 wl12xx_free_link(wl, wlvif, &hlid);
1081 }
1082 }
1083 wlvif->last_tx_hlid = 0;
1084
1085 for (i = 0; i < NUM_TX_QUEUES; i++)
1086 wlvif->tx_queue_count[i] = 0;
1087 }
1088 /* caller must hold wl->mutex and TX must be stopped */
1089 void wl12xx_tx_reset(struct wl1271 *wl)
1090 {
1091 int i;
1092 struct sk_buff *skb;
1093 struct ieee80211_tx_info *info;
1094
1095 /* only reset the queues if something bad happened */
1096 if (wl1271_tx_total_queue_count(wl) != 0) {
1097 for (i = 0; i < wl->num_links; i++)
1098 wl1271_tx_reset_link_queues(wl, i);
1099
1100 for (i = 0; i < NUM_TX_QUEUES; i++)
1101 wl->tx_queue_count[i] = 0;
1102 }
1103
1104 /*
1105 * Make sure the driver is at a consistent state, in case this
1106 * function is called from a context other than interface removal.
1107 * This call will always wake the TX queues.
1108 */
1109 wl1271_handle_tx_low_watermark(wl);
1110
1111 for (i = 0; i < wl->num_tx_desc; i++) {
1112 if (wl->tx_frames[i] == NULL)
1113 continue;
1114
1115 skb = wl->tx_frames[i];
1116 wl1271_free_tx_id(wl, i);
1117 wl1271_debug(DEBUG_TX, "freeing skb 0x%p", skb);
1118
1119 if (!wl12xx_is_dummy_packet(wl, skb)) {
1120 /*
1121 * Remove private headers before passing the skb to
1122 * mac80211
1123 */
1124 info = IEEE80211_SKB_CB(skb);
1125 skb_pull(skb, sizeof(struct wl1271_tx_hw_descr));
1126 if ((wl->quirks & WLCORE_QUIRK_TKIP_HEADER_SPACE) &&
1127 info->control.hw_key &&
1128 info->control.hw_key->cipher ==
1129 WLAN_CIPHER_SUITE_TKIP) {
1130 int hdrlen = ieee80211_get_hdrlen_from_skb(skb);
1131 memmove(skb->data + WL1271_EXTRA_SPACE_TKIP,
1132 skb->data, hdrlen);
1133 skb_pull(skb, WL1271_EXTRA_SPACE_TKIP);
1134 }
1135
1136 info->status.rates[0].idx = -1;
1137 info->status.rates[0].count = 0;
1138
1139 ieee80211_tx_status_ni(wl->hw, skb);
1140 }
1141 }
1142 }
1143
1144 #define WL1271_TX_FLUSH_TIMEOUT 500000
1145
1146 /* caller must *NOT* hold wl->mutex */
1147 void wl1271_tx_flush(struct wl1271 *wl)
1148 {
1149 unsigned long timeout, start_time;
1150 int i;
1151 start_time = jiffies;
1152 timeout = start_time + usecs_to_jiffies(WL1271_TX_FLUSH_TIMEOUT);
1153
1154 /* only one flush should be in progress, for consistent queue state */
1155 mutex_lock(&wl->flush_mutex);
1156
1157 mutex_lock(&wl->mutex);
1158 if (wl->tx_frames_cnt == 0 && wl1271_tx_total_queue_count(wl) == 0) {
1159 mutex_unlock(&wl->mutex);
1160 goto out;
1161 }
1162
1163 wlcore_stop_queues(wl, WLCORE_QUEUE_STOP_REASON_FLUSH);
1164
1165 while (!time_after(jiffies, timeout)) {
1166 wl1271_debug(DEBUG_MAC80211, "flushing tx buffer: %d %d",
1167 wl->tx_frames_cnt,
1168 wl1271_tx_total_queue_count(wl));
1169
1170 /* force Tx and give the driver some time to flush data */
1171 mutex_unlock(&wl->mutex);
1172 if (wl1271_tx_total_queue_count(wl))
1173 wl1271_tx_work(&wl->tx_work);
1174 msleep(20);
1175 mutex_lock(&wl->mutex);
1176
1177 if ((wl->tx_frames_cnt == 0) &&
1178 (wl1271_tx_total_queue_count(wl) == 0)) {
1179 wl1271_debug(DEBUG_MAC80211, "tx flush took %d ms",
1180 jiffies_to_msecs(jiffies - start_time));
1181 goto out_wake;
1182 }
1183 }
1184
1185 wl1271_warning("Unable to flush all TX buffers, "
1186 "timed out (timeout %d ms",
1187 WL1271_TX_FLUSH_TIMEOUT / 1000);
1188
1189 /* forcibly flush all Tx buffers on our queues */
1190 for (i = 0; i < wl->num_links; i++)
1191 wl1271_tx_reset_link_queues(wl, i);
1192
1193 out_wake:
1194 wlcore_wake_queues(wl, WLCORE_QUEUE_STOP_REASON_FLUSH);
1195 mutex_unlock(&wl->mutex);
1196 out:
1197 mutex_unlock(&wl->flush_mutex);
1198 }
1199 EXPORT_SYMBOL_GPL(wl1271_tx_flush);
1200
1201 u32 wl1271_tx_min_rate_get(struct wl1271 *wl, u32 rate_set)
1202 {
1203 if (WARN_ON(!rate_set))
1204 return 0;
1205
1206 return BIT(__ffs(rate_set));
1207 }
1208 EXPORT_SYMBOL_GPL(wl1271_tx_min_rate_get);
1209
1210 void wlcore_stop_queue_locked(struct wl1271 *wl, struct wl12xx_vif *wlvif,
1211 u8 queue, enum wlcore_queue_stop_reason reason)
1212 {
1213 int hwq = wlcore_tx_get_mac80211_queue(wlvif, queue);
1214 bool stopped = !!wl->queue_stop_reasons[hwq];
1215
1216 /* queue should not be stopped for this reason */
1217 WARN_ON_ONCE(test_and_set_bit(reason, &wl->queue_stop_reasons[hwq]));
1218
1219 if (stopped)
1220 return;
1221
1222 ieee80211_stop_queue(wl->hw, hwq);
1223 }
1224
1225 void wlcore_stop_queue(struct wl1271 *wl, struct wl12xx_vif *wlvif, u8 queue,
1226 enum wlcore_queue_stop_reason reason)
1227 {
1228 unsigned long flags;
1229
1230 spin_lock_irqsave(&wl->wl_lock, flags);
1231 wlcore_stop_queue_locked(wl, wlvif, queue, reason);
1232 spin_unlock_irqrestore(&wl->wl_lock, flags);
1233 }
1234
1235 void wlcore_wake_queue(struct wl1271 *wl, struct wl12xx_vif *wlvif, u8 queue,
1236 enum wlcore_queue_stop_reason reason)
1237 {
1238 unsigned long flags;
1239 int hwq = wlcore_tx_get_mac80211_queue(wlvif, queue);
1240
1241 spin_lock_irqsave(&wl->wl_lock, flags);
1242
1243 /* queue should not be clear for this reason */
1244 WARN_ON_ONCE(!test_and_clear_bit(reason, &wl->queue_stop_reasons[hwq]));
1245
1246 if (wl->queue_stop_reasons[hwq])
1247 goto out;
1248
1249 ieee80211_wake_queue(wl->hw, hwq);
1250
1251 out:
1252 spin_unlock_irqrestore(&wl->wl_lock, flags);
1253 }
1254
1255 void wlcore_stop_queues(struct wl1271 *wl,
1256 enum wlcore_queue_stop_reason reason)
1257 {
1258 int i;
1259 unsigned long flags;
1260
1261 spin_lock_irqsave(&wl->wl_lock, flags);
1262
1263 /* mark all possible queues as stopped */
1264 for (i = 0; i < WLCORE_NUM_MAC_ADDRESSES * NUM_TX_QUEUES; i++)
1265 WARN_ON_ONCE(test_and_set_bit(reason,
1266 &wl->queue_stop_reasons[i]));
1267
1268 /* use the global version to make sure all vifs in mac80211 we don't
1269 * know are stopped.
1270 */
1271 ieee80211_stop_queues(wl->hw);
1272
1273 spin_unlock_irqrestore(&wl->wl_lock, flags);
1274 }
1275
1276 void wlcore_wake_queues(struct wl1271 *wl,
1277 enum wlcore_queue_stop_reason reason)
1278 {
1279 int i;
1280 unsigned long flags;
1281
1282 spin_lock_irqsave(&wl->wl_lock, flags);
1283
1284 /* mark all possible queues as awake */
1285 for (i = 0; i < WLCORE_NUM_MAC_ADDRESSES * NUM_TX_QUEUES; i++)
1286 WARN_ON_ONCE(!test_and_clear_bit(reason,
1287 &wl->queue_stop_reasons[i]));
1288
1289 /* use the global version to make sure all vifs in mac80211 we don't
1290 * know are woken up.
1291 */
1292 ieee80211_wake_queues(wl->hw);
1293
1294 spin_unlock_irqrestore(&wl->wl_lock, flags);
1295 }
1296
1297 bool wlcore_is_queue_stopped_by_reason(struct wl1271 *wl,
1298 struct wl12xx_vif *wlvif, u8 queue,
1299 enum wlcore_queue_stop_reason reason)
1300 {
1301 unsigned long flags;
1302 bool stopped;
1303
1304 spin_lock_irqsave(&wl->wl_lock, flags);
1305 stopped = wlcore_is_queue_stopped_by_reason_locked(wl, wlvif, queue,
1306 reason);
1307 spin_unlock_irqrestore(&wl->wl_lock, flags);
1308
1309 return stopped;
1310 }
1311
1312 bool wlcore_is_queue_stopped_by_reason_locked(struct wl1271 *wl,
1313 struct wl12xx_vif *wlvif, u8 queue,
1314 enum wlcore_queue_stop_reason reason)
1315 {
1316 int hwq = wlcore_tx_get_mac80211_queue(wlvif, queue);
1317
1318 assert_spin_locked(&wl->wl_lock);
1319 return test_bit(reason, &wl->queue_stop_reasons[hwq]);
1320 }
1321
1322 bool wlcore_is_queue_stopped_locked(struct wl1271 *wl, struct wl12xx_vif *wlvif,
1323 u8 queue)
1324 {
1325 int hwq = wlcore_tx_get_mac80211_queue(wlvif, queue);
1326
1327 assert_spin_locked(&wl->wl_lock);
1328 return !!wl->queue_stop_reasons[hwq];
1329 }
Linux kernel - Deliverables
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