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ARM: mm: Recreate kernel mappings in early_paging_init()
[linux/fpc-iii.git] / drivers / net / wireless / ti / wlcore / tx.c
blob7e93fe63a2c74a215b4948a91a95c179a8d78592
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 sk_buff *skb)
90 {
91 struct ieee80211_hdr *hdr;
92
93 /*
94 * add the station to the known list before transmitting the
95 * authentication response. this way it won't get de-authed by FW
96 * when transmitting too soon.
97 */
98 hdr = (struct ieee80211_hdr *)(skb->data +
99 sizeof(struct wl1271_tx_hw_descr));
100 if (ieee80211_is_auth(hdr->frame_control))
101 wl1271_acx_set_inconnection_sta(wl, hdr->addr1);
102 }
103
104 static void wl1271_tx_regulate_link(struct wl1271 *wl,
105 struct wl12xx_vif *wlvif,
106 u8 hlid)
107 {
108 bool fw_ps;
109 u8 tx_pkts;
110
111 if (WARN_ON(!test_bit(hlid, wlvif->links_map)))
112 return;
113
114 fw_ps = test_bit(hlid, (unsigned long *)&wl->ap_fw_ps_map);
115 tx_pkts = wl->links[hlid].allocated_pkts;
116
117 /*
118 * if in FW PS and there is enough data in FW we can put the link
119 * into high-level PS and clean out its TX queues.
120 * Make an exception if this is the only connected link. In this
121 * case FW-memory congestion is less of a problem.
122 * Note that a single connected STA means 3 active links, since we must
123 * account for the global and broadcast AP links. The "fw_ps" check
124 * assures us the third link is a STA connected to the AP. Otherwise
125 * the FW would not set the PSM bit.
126 */
127 if (wl->active_link_count > 3 && fw_ps &&
128 tx_pkts >= WL1271_PS_STA_MAX_PACKETS)
129 wl12xx_ps_link_start(wl, wlvif, hlid, true);
130 }
131
132 bool wl12xx_is_dummy_packet(struct wl1271 *wl, struct sk_buff *skb)
133 {
134 return wl->dummy_packet == skb;
135 }
136 EXPORT_SYMBOL(wl12xx_is_dummy_packet);
137
138 static u8 wl12xx_tx_get_hlid_ap(struct wl1271 *wl, struct wl12xx_vif *wlvif,
139 struct sk_buff *skb, struct ieee80211_sta *sta)
140 {
141 if (sta) {
142 struct wl1271_station *wl_sta;
143
144 wl_sta = (struct wl1271_station *)sta->drv_priv;
145 return wl_sta->hlid;
146 } else {
147 struct ieee80211_hdr *hdr;
148
149 if (!test_bit(WLVIF_FLAG_AP_STARTED, &wlvif->flags))
150 return wl->system_hlid;
151
152 hdr = (struct ieee80211_hdr *)skb->data;
153 if (is_multicast_ether_addr(ieee80211_get_DA(hdr)))
154 return wlvif->ap.bcast_hlid;
155 else
156 return wlvif->ap.global_hlid;
157 }
158 }
159
160 u8 wl12xx_tx_get_hlid(struct wl1271 *wl, struct wl12xx_vif *wlvif,
161 struct sk_buff *skb, struct ieee80211_sta *sta)
162 {
163 struct ieee80211_tx_info *control;
164
165 if (wlvif->bss_type == BSS_TYPE_AP_BSS)
166 return wl12xx_tx_get_hlid_ap(wl, wlvif, skb, sta);
167
168 control = IEEE80211_SKB_CB(skb);
169 if (control->flags & IEEE80211_TX_CTL_TX_OFFCHAN) {
170 wl1271_debug(DEBUG_TX, "tx offchannel");
171 return wlvif->dev_hlid;
172 }
173
174 return wlvif->sta.hlid;
175 }
176
177 unsigned int wlcore_calc_packet_alignment(struct wl1271 *wl,
178 unsigned int packet_length)
179 {
180 if ((wl->quirks & WLCORE_QUIRK_TX_PAD_LAST_FRAME) ||
181 !(wl->quirks & WLCORE_QUIRK_TX_BLOCKSIZE_ALIGN))
182 return ALIGN(packet_length, WL1271_TX_ALIGN_TO);
183 else
184 return ALIGN(packet_length, WL12XX_BUS_BLOCK_SIZE);
185 }
186 EXPORT_SYMBOL(wlcore_calc_packet_alignment);
187
188 static int wl1271_tx_allocate(struct wl1271 *wl, struct wl12xx_vif *wlvif,
189 struct sk_buff *skb, u32 extra, u32 buf_offset,
190 u8 hlid, bool is_gem)
191 {
192 struct wl1271_tx_hw_descr *desc;
193 u32 total_len = skb->len + sizeof(struct wl1271_tx_hw_descr) + extra;
194 u32 total_blocks;
195 int id, ret = -EBUSY, ac;
196 u32 spare_blocks;
197
198 if (buf_offset + total_len > wl->aggr_buf_size)
199 return -EAGAIN;
200
201 spare_blocks = wlcore_hw_get_spare_blocks(wl, is_gem);
202
203 /* allocate free identifier for the packet */
204 id = wl1271_alloc_tx_id(wl, skb);
205 if (id < 0)
206 return id;
207
208 total_blocks = wlcore_hw_calc_tx_blocks(wl, total_len, spare_blocks);
209
210 if (total_blocks <= wl->tx_blocks_available) {
211 desc = (struct wl1271_tx_hw_descr *)skb_push(
212 skb, total_len - skb->len);
213
214 wlcore_hw_set_tx_desc_blocks(wl, desc, total_blocks,
215 spare_blocks);
216
217 desc->id = id;
218
219 wl->tx_blocks_available -= total_blocks;
220 wl->tx_allocated_blocks += total_blocks;
221
222 /* If the FW was empty before, arm the Tx watchdog */
223 if (wl->tx_allocated_blocks == total_blocks)
224 wl12xx_rearm_tx_watchdog_locked(wl);
225
226 ac = wl1271_tx_get_queue(skb_get_queue_mapping(skb));
227 wl->tx_allocated_pkts[ac]++;
228
229 if (test_bit(hlid, wl->links_map))
230 wl->links[hlid].allocated_pkts++;
231
232 ret = 0;
233
234 wl1271_debug(DEBUG_TX,
235 "tx_allocate: size: %d, blocks: %d, id: %d",
236 total_len, total_blocks, id);
237 } else {
238 wl1271_free_tx_id(wl, id);
239 }
240
241 return ret;
242 }
243
244 static void wl1271_tx_fill_hdr(struct wl1271 *wl, struct wl12xx_vif *wlvif,
245 struct sk_buff *skb, u32 extra,
246 struct ieee80211_tx_info *control, u8 hlid)
247 {
248 struct timespec ts;
249 struct wl1271_tx_hw_descr *desc;
250 int ac, rate_idx;
251 s64 hosttime;
252 u16 tx_attr = 0;
253 __le16 frame_control;
254 struct ieee80211_hdr *hdr;
255 u8 *frame_start;
256 bool is_dummy;
257
258 desc = (struct wl1271_tx_hw_descr *) skb->data;
259 frame_start = (u8 *)(desc + 1);
260 hdr = (struct ieee80211_hdr *)(frame_start + extra);
261 frame_control = hdr->frame_control;
262
263 /* relocate space for security header */
264 if (extra) {
265 int hdrlen = ieee80211_hdrlen(frame_control);
266 memmove(frame_start, hdr, hdrlen);
267 skb_set_network_header(skb, skb_network_offset(skb) + extra);
268 }
269
270 /* configure packet life time */
271 getnstimeofday(&ts);
272 hosttime = (timespec_to_ns(&ts) >> 10);
273 desc->start_time = cpu_to_le32(hosttime - wl->time_offset);
274
275 is_dummy = wl12xx_is_dummy_packet(wl, skb);
276 if (is_dummy || !wlvif || wlvif->bss_type != BSS_TYPE_AP_BSS)
277 desc->life_time = cpu_to_le16(TX_HW_MGMT_PKT_LIFETIME_TU);
278 else
279 desc->life_time = cpu_to_le16(TX_HW_AP_MODE_PKT_LIFETIME_TU);
280
281 /* queue */
282 ac = wl1271_tx_get_queue(skb_get_queue_mapping(skb));
283 desc->tid = skb->priority;
284
285 if (is_dummy) {
286 /*
287 * FW expects the dummy packet to have an invalid session id -
288 * any session id that is different than the one set in the join
289 */
290 tx_attr = (SESSION_COUNTER_INVALID <<
291 TX_HW_ATTR_OFST_SESSION_COUNTER) &
292 TX_HW_ATTR_SESSION_COUNTER;
293
294 tx_attr |= TX_HW_ATTR_TX_DUMMY_REQ;
295 } else if (wlvif) {
296 u8 session_id = wl->session_ids[hlid];
297
298 if ((wl->quirks & WLCORE_QUIRK_AP_ZERO_SESSION_ID) &&
299 (wlvif->bss_type == BSS_TYPE_AP_BSS))
300 session_id = 0;
301
302 /* configure the tx attributes */
303 tx_attr = session_id << TX_HW_ATTR_OFST_SESSION_COUNTER;
304 }
305
306 desc->hlid = hlid;
307 if (is_dummy || !wlvif)
308 rate_idx = 0;
309 else if (wlvif->bss_type != BSS_TYPE_AP_BSS) {
310 /*
311 * if the packets are data packets
312 * send them with AP rate policies (EAPOLs are an exception),
313 * otherwise use default basic rates
314 */
315 if (skb->protocol == cpu_to_be16(ETH_P_PAE))
316 rate_idx = wlvif->sta.basic_rate_idx;
317 else if (control->flags & IEEE80211_TX_CTL_NO_CCK_RATE)
318 rate_idx = wlvif->sta.p2p_rate_idx;
319 else if (ieee80211_is_data(frame_control))
320 rate_idx = wlvif->sta.ap_rate_idx;
321 else
322 rate_idx = wlvif->sta.basic_rate_idx;
323 } else {
324 if (hlid == wlvif->ap.global_hlid)
325 rate_idx = wlvif->ap.mgmt_rate_idx;
326 else if (hlid == wlvif->ap.bcast_hlid ||
327 skb->protocol == cpu_to_be16(ETH_P_PAE) ||
328 !ieee80211_is_data(frame_control))
329 /*
330 * send non-data, bcast and EAPOLs using the
331 * min basic rate
332 */
333 rate_idx = wlvif->ap.bcast_rate_idx;
334 else
335 rate_idx = wlvif->ap.ucast_rate_idx[ac];
336 }
337
338 tx_attr |= rate_idx << TX_HW_ATTR_OFST_RATE_POLICY;
339
340 /* for WEP shared auth - no fw encryption is needed */
341 if (ieee80211_is_auth(frame_control) &&
342 ieee80211_has_protected(frame_control))
343 tx_attr |= TX_HW_ATTR_HOST_ENCRYPT;
344
345 desc->tx_attr = cpu_to_le16(tx_attr);
346
347 wlcore_hw_set_tx_desc_csum(wl, desc, skb);
348 wlcore_hw_set_tx_desc_data_len(wl, desc, skb);
349 }
350
351 /* caller must hold wl->mutex */
352 static int wl1271_prepare_tx_frame(struct wl1271 *wl, struct wl12xx_vif *wlvif,
353 struct sk_buff *skb, u32 buf_offset, u8 hlid)
354 {
355 struct ieee80211_tx_info *info;
356 u32 extra = 0;
357 int ret = 0;
358 u32 total_len;
359 bool is_dummy;
360 bool is_gem = false;
361
362 if (!skb) {
363 wl1271_error("discarding null skb");
364 return -EINVAL;
365 }
366
367 if (hlid == WL12XX_INVALID_LINK_ID) {
368 wl1271_error("invalid hlid. dropping skb 0x%p", skb);
369 return -EINVAL;
370 }
371
372 info = IEEE80211_SKB_CB(skb);
373
374 is_dummy = wl12xx_is_dummy_packet(wl, skb);
375
376 if ((wl->quirks & WLCORE_QUIRK_TKIP_HEADER_SPACE) &&
377 info->control.hw_key &&
378 info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP)
379 extra = WL1271_EXTRA_SPACE_TKIP;
380
381 if (info->control.hw_key) {
382 bool is_wep;
383 u8 idx = info->control.hw_key->hw_key_idx;
384 u32 cipher = info->control.hw_key->cipher;
385
386 is_wep = (cipher == WLAN_CIPHER_SUITE_WEP40) ||
387 (cipher == WLAN_CIPHER_SUITE_WEP104);
388
389 if (WARN_ON(is_wep && wlvif->default_key != idx)) {
390 ret = wl1271_set_default_wep_key(wl, wlvif, idx);
391 if (ret < 0)
392 return ret;
393 wlvif->default_key = idx;
394 }
395
396 is_gem = (cipher == WL1271_CIPHER_SUITE_GEM);
397 }
398
399 ret = wl1271_tx_allocate(wl, wlvif, skb, extra, buf_offset, hlid,
400 is_gem);
401 if (ret < 0)
402 return ret;
403
404 wl1271_tx_fill_hdr(wl, wlvif, skb, extra, info, hlid);
405
406 if (!is_dummy && wlvif && wlvif->bss_type == BSS_TYPE_AP_BSS) {
407 wl1271_tx_ap_update_inconnection_sta(wl, skb);
408 wl1271_tx_regulate_link(wl, wlvif, hlid);
409 }
410
411 /*
412 * The length of each packet is stored in terms of
413 * words. Thus, we must pad the skb data to make sure its
414 * length is aligned. The number of padding bytes is computed
415 * and set in wl1271_tx_fill_hdr.
416 * In special cases, we want to align to a specific block size
417 * (eg. for wl128x with SDIO we align to 256).
418 */
419 total_len = wlcore_calc_packet_alignment(wl, skb->len);
420
421 memcpy(wl->aggr_buf + buf_offset, skb->data, skb->len);
422 memset(wl->aggr_buf + buf_offset + skb->len, 0, total_len - skb->len);
423
424 /* Revert side effects in the dummy packet skb, so it can be reused */
425 if (is_dummy)
426 skb_pull(skb, sizeof(struct wl1271_tx_hw_descr));
427
428 return total_len;
429 }
430
431 u32 wl1271_tx_enabled_rates_get(struct wl1271 *wl, u32 rate_set,
432 enum ieee80211_band rate_band)
433 {
434 struct ieee80211_supported_band *band;
435 u32 enabled_rates = 0;
436 int bit;
437
438 band = wl->hw->wiphy->bands[rate_band];
439 for (bit = 0; bit < band->n_bitrates; bit++) {
440 if (rate_set & 0x1)
441 enabled_rates |= band->bitrates[bit].hw_value;
442 rate_set >>= 1;
443 }
444
445 /* MCS rates indication are on bits 16 - 31 */
446 rate_set >>= HW_HT_RATES_OFFSET - band->n_bitrates;
447
448 for (bit = 0; bit < 16; bit++) {
449 if (rate_set & 0x1)
450 enabled_rates |= (CONF_HW_BIT_RATE_MCS_0 << bit);
451 rate_set >>= 1;
452 }
453
454 return enabled_rates;
455 }
456
457 void wl1271_handle_tx_low_watermark(struct wl1271 *wl)
458 {
459 int i;
460 struct wl12xx_vif *wlvif;
461
462 wl12xx_for_each_wlvif(wl, wlvif) {
463 for (i = 0; i < NUM_TX_QUEUES; i++) {
464 if (wlcore_is_queue_stopped_by_reason(wl, wlvif, i,
465 WLCORE_QUEUE_STOP_REASON_WATERMARK) &&
466 wlvif->tx_queue_count[i] <=
467 WL1271_TX_QUEUE_LOW_WATERMARK)
468 /* firmware buffer has space, restart queues */
469 wlcore_wake_queue(wl, wlvif, i,
470 WLCORE_QUEUE_STOP_REASON_WATERMARK);
471 }
472 }
473 }
474
475 static int wlcore_select_ac(struct wl1271 *wl)
476 {
477 int i, q = -1, ac;
478 u32 min_pkts = 0xffffffff;
479
480 /*
481 * Find a non-empty ac where:
482 * 1. There are packets to transmit
483 * 2. The FW has the least allocated blocks
484 *
485 * We prioritize the ACs according to VO>VI>BE>BK
486 */
487 for (i = 0; i < NUM_TX_QUEUES; i++) {
488 ac = wl1271_tx_get_queue(i);
489 if (wl->tx_queue_count[ac] &&
490 wl->tx_allocated_pkts[ac] < min_pkts) {
491 q = ac;
492 min_pkts = wl->tx_allocated_pkts[q];
493 }
494 }
495
496 return q;
497 }
498
499 static struct sk_buff *wlcore_lnk_dequeue(struct wl1271 *wl,
500 struct wl1271_link *lnk, u8 q)
501 {
502 struct sk_buff *skb;
503 unsigned long flags;
504
505 skb = skb_dequeue(&lnk->tx_queue[q]);
506 if (skb) {
507 spin_lock_irqsave(&wl->wl_lock, flags);
508 WARN_ON_ONCE(wl->tx_queue_count[q] <= 0);
509 wl->tx_queue_count[q]--;
510 if (lnk->wlvif) {
511 WARN_ON_ONCE(lnk->wlvif->tx_queue_count[q] <= 0);
512 lnk->wlvif->tx_queue_count[q]--;
513 }
514 spin_unlock_irqrestore(&wl->wl_lock, flags);
515 }
516
517 return skb;
518 }
519
520 static struct sk_buff *wlcore_lnk_dequeue_high_prio(struct wl1271 *wl,
521 u8 hlid, u8 ac,
522 u8 *low_prio_hlid)
523 {
524 struct wl1271_link *lnk = &wl->links[hlid];
525
526 if (!wlcore_hw_lnk_high_prio(wl, hlid, lnk)) {
527 if (*low_prio_hlid == WL12XX_INVALID_LINK_ID &&
528 !skb_queue_empty(&lnk->tx_queue[ac]) &&
529 wlcore_hw_lnk_low_prio(wl, hlid, lnk))
530 /* we found the first non-empty low priority queue */
531 *low_prio_hlid = hlid;
532
533 return NULL;
534 }
535
536 return wlcore_lnk_dequeue(wl, lnk, ac);
537 }
538
539 static struct sk_buff *wlcore_vif_dequeue_high_prio(struct wl1271 *wl,
540 struct wl12xx_vif *wlvif,
541 u8 ac, u8 *hlid,
542 u8 *low_prio_hlid)
543 {
544 struct sk_buff *skb = NULL;
545 int i, h, start_hlid;
546
547 /* start from the link after the last one */
548 start_hlid = (wlvif->last_tx_hlid + 1) % WL12XX_MAX_LINKS;
549
550 /* dequeue according to AC, round robin on each link */
551 for (i = 0; i < WL12XX_MAX_LINKS; i++) {
552 h = (start_hlid + i) % WL12XX_MAX_LINKS;
553
554 /* only consider connected stations */
555 if (!test_bit(h, wlvif->links_map))
556 continue;
557
558 skb = wlcore_lnk_dequeue_high_prio(wl, h, ac,
559 low_prio_hlid);
560 if (!skb)
561 continue;
562
563 wlvif->last_tx_hlid = h;
564 break;
565 }
566
567 if (!skb)
568 wlvif->last_tx_hlid = 0;
569
570 *hlid = wlvif->last_tx_hlid;
571 return skb;
572 }
573
574 static struct sk_buff *wl1271_skb_dequeue(struct wl1271 *wl, u8 *hlid)
575 {
576 unsigned long flags;
577 struct wl12xx_vif *wlvif = wl->last_wlvif;
578 struct sk_buff *skb = NULL;
579 int ac;
580 u8 low_prio_hlid = WL12XX_INVALID_LINK_ID;
581
582 ac = wlcore_select_ac(wl);
583 if (ac < 0)
584 goto out;
585
586 /* continue from last wlvif (round robin) */
587 if (wlvif) {
588 wl12xx_for_each_wlvif_continue(wl, wlvif) {
589 if (!wlvif->tx_queue_count[ac])
590 continue;
591
592 skb = wlcore_vif_dequeue_high_prio(wl, wlvif, ac, hlid,
593 &low_prio_hlid);
594 if (!skb)
595 continue;
596
597 wl->last_wlvif = wlvif;
598 break;
599 }
600 }
601
602 /* dequeue from the system HLID before the restarting wlvif list */
603 if (!skb) {
604 skb = wlcore_lnk_dequeue_high_prio(wl, wl->system_hlid,
605 ac, &low_prio_hlid);
606 if (skb) {
607 *hlid = wl->system_hlid;
608 wl->last_wlvif = NULL;
609 }
610 }
611
612 /* Do a new pass over the wlvif list. But no need to continue
613 * after last_wlvif. The previous pass should have found it. */
614 if (!skb) {
615 wl12xx_for_each_wlvif(wl, wlvif) {
616 if (!wlvif->tx_queue_count[ac])
617 goto next;
618
619 skb = wlcore_vif_dequeue_high_prio(wl, wlvif, ac, hlid,
620 &low_prio_hlid);
621 if (skb) {
622 wl->last_wlvif = wlvif;
623 break;
624 }
625
626 next:
627 if (wlvif == wl->last_wlvif)
628 break;
629 }
630 }
631
632 /* no high priority skbs found - but maybe a low priority one? */
633 if (!skb && low_prio_hlid != WL12XX_INVALID_LINK_ID) {
634 struct wl1271_link *lnk = &wl->links[low_prio_hlid];
635 skb = wlcore_lnk_dequeue(wl, lnk, ac);
636
637 WARN_ON(!skb); /* we checked this before */
638 *hlid = low_prio_hlid;
639
640 /* ensure proper round robin in the vif/link levels */
641 wl->last_wlvif = lnk->wlvif;
642 if (lnk->wlvif)
643 lnk->wlvif->last_tx_hlid = low_prio_hlid;
644
645 }
646
647 out:
648 if (!skb &&
649 test_and_clear_bit(WL1271_FLAG_DUMMY_PACKET_PENDING, &wl->flags)) {
650 int q;
651
652 skb = wl->dummy_packet;
653 *hlid = wl->system_hlid;
654 q = wl1271_tx_get_queue(skb_get_queue_mapping(skb));
655 spin_lock_irqsave(&wl->wl_lock, flags);
656 WARN_ON_ONCE(wl->tx_queue_count[q] <= 0);
657 wl->tx_queue_count[q]--;
658 spin_unlock_irqrestore(&wl->wl_lock, flags);
659 }
660
661 return skb;
662 }
663
664 static void wl1271_skb_queue_head(struct wl1271 *wl, struct wl12xx_vif *wlvif,
665 struct sk_buff *skb, u8 hlid)
666 {
667 unsigned long flags;
668 int q = wl1271_tx_get_queue(skb_get_queue_mapping(skb));
669
670 if (wl12xx_is_dummy_packet(wl, skb)) {
671 set_bit(WL1271_FLAG_DUMMY_PACKET_PENDING, &wl->flags);
672 } else {
673 skb_queue_head(&wl->links[hlid].tx_queue[q], skb);
674
675 /* make sure we dequeue the same packet next time */
676 wlvif->last_tx_hlid = (hlid + WL12XX_MAX_LINKS - 1) %
677 WL12XX_MAX_LINKS;
678 }
679
680 spin_lock_irqsave(&wl->wl_lock, flags);
681 wl->tx_queue_count[q]++;
682 if (wlvif)
683 wlvif->tx_queue_count[q]++;
684 spin_unlock_irqrestore(&wl->wl_lock, flags);
685 }
686
687 static bool wl1271_tx_is_data_present(struct sk_buff *skb)
688 {
689 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
690
691 return ieee80211_is_data_present(hdr->frame_control);
692 }
693
694 void wl12xx_rearm_rx_streaming(struct wl1271 *wl, unsigned long *active_hlids)
695 {
696 struct wl12xx_vif *wlvif;
697 u32 timeout;
698 u8 hlid;
699
700 if (!wl->conf.rx_streaming.interval)
701 return;
702
703 if (!wl->conf.rx_streaming.always &&
704 !test_bit(WL1271_FLAG_SOFT_GEMINI, &wl->flags))
705 return;
706
707 timeout = wl->conf.rx_streaming.duration;
708 wl12xx_for_each_wlvif_sta(wl, wlvif) {
709 bool found = false;
710 for_each_set_bit(hlid, active_hlids, WL12XX_MAX_LINKS) {
711 if (test_bit(hlid, wlvif->links_map)) {
712 found = true;
713 break;
714 }
715 }
716
717 if (!found)
718 continue;
719
720 /* enable rx streaming */
721 if (!test_bit(WLVIF_FLAG_RX_STREAMING_STARTED, &wlvif->flags))
722 ieee80211_queue_work(wl->hw,
723 &wlvif->rx_streaming_enable_work);
724
725 mod_timer(&wlvif->rx_streaming_timer,
726 jiffies + msecs_to_jiffies(timeout));
727 }
728 }
729
730 /*
731 * Returns failure values only in case of failed bus ops within this function.
732 * wl1271_prepare_tx_frame retvals won't be returned in order to avoid
733 * triggering recovery by higher layers when not necessary.
734 * In case a FW command fails within wl1271_prepare_tx_frame fails a recovery
735 * will be queued in wl1271_cmd_send. -EAGAIN/-EBUSY from prepare_tx_frame
736 * can occur and are legitimate so don't propagate. -EINVAL will emit a WARNING
737 * within prepare_tx_frame code but there's nothing we should do about those
738 * as well.
739 */
740 int wlcore_tx_work_locked(struct wl1271 *wl)
741 {
742 struct wl12xx_vif *wlvif;
743 struct sk_buff *skb;
744 struct wl1271_tx_hw_descr *desc;
745 u32 buf_offset = 0, last_len = 0;
746 bool sent_packets = false;
747 unsigned long active_hlids[BITS_TO_LONGS(WL12XX_MAX_LINKS)] = {0};
748 int ret = 0;
749 int bus_ret = 0;
750 u8 hlid;
751
752 if (unlikely(wl->state != WLCORE_STATE_ON))
753 return 0;
754
755 while ((skb = wl1271_skb_dequeue(wl, &hlid))) {
756 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
757 bool has_data = false;
758
759 wlvif = NULL;
760 if (!wl12xx_is_dummy_packet(wl, skb))
761 wlvif = wl12xx_vif_to_data(info->control.vif);
762 else
763 hlid = wl->system_hlid;
764
765 has_data = wlvif && wl1271_tx_is_data_present(skb);
766 ret = wl1271_prepare_tx_frame(wl, wlvif, skb, buf_offset,
767 hlid);
768 if (ret == -EAGAIN) {
769 /*
770 * Aggregation buffer is full.
771 * Flush buffer and try again.
772 */
773 wl1271_skb_queue_head(wl, wlvif, skb, hlid);
774
775 buf_offset = wlcore_hw_pre_pkt_send(wl, buf_offset,
776 last_len);
777 bus_ret = wlcore_write_data(wl, REG_SLV_MEM_DATA,
778 wl->aggr_buf, buf_offset, true);
779 if (bus_ret < 0)
780 goto out;
781
782 sent_packets = true;
783 buf_offset = 0;
784 continue;
785 } else if (ret == -EBUSY) {
786 /*
787 * Firmware buffer is full.
788 * Queue back last skb, and stop aggregating.
789 */
790 wl1271_skb_queue_head(wl, wlvif, skb, hlid);
791 /* No work left, avoid scheduling redundant tx work */
792 set_bit(WL1271_FLAG_FW_TX_BUSY, &wl->flags);
793 goto out_ack;
794 } else if (ret < 0) {
795 if (wl12xx_is_dummy_packet(wl, skb))
796 /*
797 * fw still expects dummy packet,
798 * so re-enqueue it
799 */
800 wl1271_skb_queue_head(wl, wlvif, skb, hlid);
801 else
802 ieee80211_free_txskb(wl->hw, skb);
803 goto out_ack;
804 }
805 last_len = ret;
806 buf_offset += last_len;
807 wl->tx_packets_count++;
808 if (has_data) {
809 desc = (struct wl1271_tx_hw_descr *) skb->data;
810 __set_bit(desc->hlid, active_hlids);
811 }
812 }
813
814 out_ack:
815 if (buf_offset) {
816 buf_offset = wlcore_hw_pre_pkt_send(wl, buf_offset, last_len);
817 bus_ret = wlcore_write_data(wl, REG_SLV_MEM_DATA, wl->aggr_buf,
818 buf_offset, true);
819 if (bus_ret < 0)
820 goto out;
821
822 sent_packets = true;
823 }
824 if (sent_packets) {
825 /*
826 * Interrupt the firmware with the new packets. This is only
827 * required for older hardware revisions
828 */
829 if (wl->quirks & WLCORE_QUIRK_END_OF_TRANSACTION) {
830 bus_ret = wlcore_write32(wl, WL12XX_HOST_WR_ACCESS,
831 wl->tx_packets_count);
832 if (bus_ret < 0)
833 goto out;
834 }
835
836 wl1271_handle_tx_low_watermark(wl);
837 }
838 wl12xx_rearm_rx_streaming(wl, active_hlids);
839
840 out:
841 return bus_ret;
842 }
843
844 void wl1271_tx_work(struct work_struct *work)
845 {
846 struct wl1271 *wl = container_of(work, struct wl1271, tx_work);
847 int ret;
848
849 mutex_lock(&wl->mutex);
850 ret = wl1271_ps_elp_wakeup(wl);
851 if (ret < 0)
852 goto out;
853
854 ret = wlcore_tx_work_locked(wl);
855 if (ret < 0) {
856 wl12xx_queue_recovery_work(wl);
857 goto out;
858 }
859
860 wl1271_ps_elp_sleep(wl);
861 out:
862 mutex_unlock(&wl->mutex);
863 }
864
865 static u8 wl1271_tx_get_rate_flags(u8 rate_class_index)
866 {
867 u8 flags = 0;
868
869 /*
870 * TODO: use wl12xx constants when this code is moved to wl12xx, as
871 * only it uses Tx-completion.
872 */
873 if (rate_class_index <= 8)
874 flags |= IEEE80211_TX_RC_MCS;
875
876 /*
877 * TODO: use wl12xx constants when this code is moved to wl12xx, as
878 * only it uses Tx-completion.
879 */
880 if (rate_class_index == 0)
881 flags |= IEEE80211_TX_RC_SHORT_GI;
882
883 return flags;
884 }
885
886 static void wl1271_tx_complete_packet(struct wl1271 *wl,
887 struct wl1271_tx_hw_res_descr *result)
888 {
889 struct ieee80211_tx_info *info;
890 struct ieee80211_vif *vif;
891 struct wl12xx_vif *wlvif;
892 struct sk_buff *skb;
893 int id = result->id;
894 int rate = -1;
895 u8 rate_flags = 0;
896 u8 retries = 0;
897
898 /* check for id legality */
899 if (unlikely(id >= wl->num_tx_desc || wl->tx_frames[id] == NULL)) {
900 wl1271_warning("TX result illegal id: %d", id);
901 return;
902 }
903
904 skb = wl->tx_frames[id];
905 info = IEEE80211_SKB_CB(skb);
906
907 if (wl12xx_is_dummy_packet(wl, skb)) {
908 wl1271_free_tx_id(wl, id);
909 return;
910 }
911
912 /* info->control is valid as long as we don't update info->status */
913 vif = info->control.vif;
914 wlvif = wl12xx_vif_to_data(vif);
915
916 /* update the TX status info */
917 if (result->status == TX_SUCCESS) {
918 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
919 info->flags |= IEEE80211_TX_STAT_ACK;
920 rate = wlcore_rate_to_idx(wl, result->rate_class_index,
921 wlvif->band);
922 rate_flags = wl1271_tx_get_rate_flags(result->rate_class_index);
923 retries = result->ack_failures;
924 } else if (result->status == TX_RETRY_EXCEEDED) {
925 wl->stats.excessive_retries++;
926 retries = result->ack_failures;
927 }
928
929 info->status.rates[0].idx = rate;
930 info->status.rates[0].count = retries;
931 info->status.rates[0].flags = rate_flags;
932 info->status.ack_signal = -1;
933
934 wl->stats.retry_count += result->ack_failures;
935
936 /* remove private header from packet */
937 skb_pull(skb, sizeof(struct wl1271_tx_hw_descr));
938
939 /* remove TKIP header space if present */
940 if ((wl->quirks & WLCORE_QUIRK_TKIP_HEADER_SPACE) &&
941 info->control.hw_key &&
942 info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP) {
943 int hdrlen = ieee80211_get_hdrlen_from_skb(skb);
944 memmove(skb->data + WL1271_EXTRA_SPACE_TKIP, skb->data,
945 hdrlen);
946 skb_pull(skb, WL1271_EXTRA_SPACE_TKIP);
947 }
948
949 wl1271_debug(DEBUG_TX, "tx status id %u skb 0x%p failures %u rate 0x%x"
950 " status 0x%x",
951 result->id, skb, result->ack_failures,
952 result->rate_class_index, result->status);
953
954 /* return the packet to the stack */
955 skb_queue_tail(&wl->deferred_tx_queue, skb);
956 queue_work(wl->freezable_wq, &wl->netstack_work);
957 wl1271_free_tx_id(wl, result->id);
958 }
959
960 /* Called upon reception of a TX complete interrupt */
961 int wlcore_tx_complete(struct wl1271 *wl)
962 {
963 struct wl1271_acx_mem_map *memmap = wl->target_mem_map;
964 u32 count, fw_counter;
965 u32 i;
966 int ret;
967
968 /* read the tx results from the chipset */
969 ret = wlcore_read(wl, le32_to_cpu(memmap->tx_result),
970 wl->tx_res_if, sizeof(*wl->tx_res_if), false);
971 if (ret < 0)
972 goto out;
973
974 fw_counter = le32_to_cpu(wl->tx_res_if->tx_result_fw_counter);
975
976 /* write host counter to chipset (to ack) */
977 ret = wlcore_write32(wl, le32_to_cpu(memmap->tx_result) +
978 offsetof(struct wl1271_tx_hw_res_if,
979 tx_result_host_counter), fw_counter);
980 if (ret < 0)
981 goto out;
982
983 count = fw_counter - wl->tx_results_count;
984 wl1271_debug(DEBUG_TX, "tx_complete received, packets: %d", count);
985
986 /* verify that the result buffer is not getting overrun */
987 if (unlikely(count > TX_HW_RESULT_QUEUE_LEN))
988 wl1271_warning("TX result overflow from chipset: %d", count);
989
990 /* process the results */
991 for (i = 0; i < count; i++) {
992 struct wl1271_tx_hw_res_descr *result;
993 u8 offset = wl->tx_results_count & TX_HW_RESULT_QUEUE_LEN_MASK;
994
995 /* process the packet */
996 result = &(wl->tx_res_if->tx_results_queue[offset]);
997 wl1271_tx_complete_packet(wl, result);
998
999 wl->tx_results_count++;
1000 }
1001
1002 out:
1003 return ret;
1004 }
1005 EXPORT_SYMBOL(wlcore_tx_complete);
1006
1007 void wl1271_tx_reset_link_queues(struct wl1271 *wl, u8 hlid)
1008 {
1009 struct sk_buff *skb;
1010 int i;
1011 unsigned long flags;
1012 struct ieee80211_tx_info *info;
1013 int total[NUM_TX_QUEUES];
1014 struct wl1271_link *lnk = &wl->links[hlid];
1015
1016 for (i = 0; i < NUM_TX_QUEUES; i++) {
1017 total[i] = 0;
1018 while ((skb = skb_dequeue(&lnk->tx_queue[i]))) {
1019 wl1271_debug(DEBUG_TX, "link freeing skb 0x%p", skb);
1020
1021 if (!wl12xx_is_dummy_packet(wl, skb)) {
1022 info = IEEE80211_SKB_CB(skb);
1023 info->status.rates[0].idx = -1;
1024 info->status.rates[0].count = 0;
1025 ieee80211_tx_status_ni(wl->hw, skb);
1026 }
1027
1028 total[i]++;
1029 }
1030 }
1031
1032 spin_lock_irqsave(&wl->wl_lock, flags);
1033 for (i = 0; i < NUM_TX_QUEUES; i++) {
1034 wl->tx_queue_count[i] -= total[i];
1035 if (lnk->wlvif)
1036 lnk->wlvif->tx_queue_count[i] -= total[i];
1037 }
1038 spin_unlock_irqrestore(&wl->wl_lock, flags);
1039
1040 wl1271_handle_tx_low_watermark(wl);
1041 }
1042
1043 /* caller must hold wl->mutex and TX must be stopped */
1044 void wl12xx_tx_reset_wlvif(struct wl1271 *wl, struct wl12xx_vif *wlvif)
1045 {
1046 int i;
1047
1048 /* TX failure */
1049 for_each_set_bit(i, wlvif->links_map, WL12XX_MAX_LINKS) {
1050 if (wlvif->bss_type == BSS_TYPE_AP_BSS &&
1051 i != wlvif->ap.bcast_hlid && i != wlvif->ap.global_hlid) {
1052 /* this calls wl12xx_free_link */
1053 wl1271_free_sta(wl, wlvif, i);
1054 } else {
1055 u8 hlid = i;
1056 wl12xx_free_link(wl, wlvif, &hlid);
1057 }
1058 }
1059 wlvif->last_tx_hlid = 0;
1060
1061 for (i = 0; i < NUM_TX_QUEUES; i++)
1062 wlvif->tx_queue_count[i] = 0;
1063 }
1064 /* caller must hold wl->mutex and TX must be stopped */
1065 void wl12xx_tx_reset(struct wl1271 *wl)
1066 {
1067 int i;
1068 struct sk_buff *skb;
1069 struct ieee80211_tx_info *info;
1070
1071 /* only reset the queues if something bad happened */
1072 if (wl1271_tx_total_queue_count(wl) != 0) {
1073 for (i = 0; i < WL12XX_MAX_LINKS; i++)
1074 wl1271_tx_reset_link_queues(wl, i);
1075
1076 for (i = 0; i < NUM_TX_QUEUES; i++)
1077 wl->tx_queue_count[i] = 0;
1078 }
1079
1080 /*
1081 * Make sure the driver is at a consistent state, in case this
1082 * function is called from a context other than interface removal.
1083 * This call will always wake the TX queues.
1084 */
1085 wl1271_handle_tx_low_watermark(wl);
1086
1087 for (i = 0; i < wl->num_tx_desc; i++) {
1088 if (wl->tx_frames[i] == NULL)
1089 continue;
1090
1091 skb = wl->tx_frames[i];
1092 wl1271_free_tx_id(wl, i);
1093 wl1271_debug(DEBUG_TX, "freeing skb 0x%p", skb);
1094
1095 if (!wl12xx_is_dummy_packet(wl, skb)) {
1096 /*
1097 * Remove private headers before passing the skb to
1098 * mac80211
1099 */
1100 info = IEEE80211_SKB_CB(skb);
1101 skb_pull(skb, sizeof(struct wl1271_tx_hw_descr));
1102 if ((wl->quirks & WLCORE_QUIRK_TKIP_HEADER_SPACE) &&
1103 info->control.hw_key &&
1104 info->control.hw_key->cipher ==
1105 WLAN_CIPHER_SUITE_TKIP) {
1106 int hdrlen = ieee80211_get_hdrlen_from_skb(skb);
1107 memmove(skb->data + WL1271_EXTRA_SPACE_TKIP,
1108 skb->data, hdrlen);
1109 skb_pull(skb, WL1271_EXTRA_SPACE_TKIP);
1110 }
1111
1112 info->status.rates[0].idx = -1;
1113 info->status.rates[0].count = 0;
1114
1115 ieee80211_tx_status_ni(wl->hw, skb);
1116 }
1117 }
1118 }
1119
1120 #define WL1271_TX_FLUSH_TIMEOUT 500000
1121
1122 /* caller must *NOT* hold wl->mutex */
1123 void wl1271_tx_flush(struct wl1271 *wl)
1124 {
1125 unsigned long timeout, start_time;
1126 int i;
1127 start_time = jiffies;
1128 timeout = start_time + usecs_to_jiffies(WL1271_TX_FLUSH_TIMEOUT);
1129
1130 /* only one flush should be in progress, for consistent queue state */
1131 mutex_lock(&wl->flush_mutex);
1132
1133 mutex_lock(&wl->mutex);
1134 if (wl->tx_frames_cnt == 0 && wl1271_tx_total_queue_count(wl) == 0) {
1135 mutex_unlock(&wl->mutex);
1136 goto out;
1137 }
1138
1139 wlcore_stop_queues(wl, WLCORE_QUEUE_STOP_REASON_FLUSH);
1140
1141 while (!time_after(jiffies, timeout)) {
1142 wl1271_debug(DEBUG_MAC80211, "flushing tx buffer: %d %d",
1143 wl->tx_frames_cnt,
1144 wl1271_tx_total_queue_count(wl));
1145
1146 /* force Tx and give the driver some time to flush data */
1147 mutex_unlock(&wl->mutex);
1148 if (wl1271_tx_total_queue_count(wl))
1149 wl1271_tx_work(&wl->tx_work);
1150 msleep(20);
1151 mutex_lock(&wl->mutex);
1152
1153 if ((wl->tx_frames_cnt == 0) &&
1154 (wl1271_tx_total_queue_count(wl) == 0)) {
1155 wl1271_debug(DEBUG_MAC80211, "tx flush took %d ms",
1156 jiffies_to_msecs(jiffies - start_time));
1157 goto out_wake;
1158 }
1159 }
1160
1161 wl1271_warning("Unable to flush all TX buffers, "
1162 "timed out (timeout %d ms",
1163 WL1271_TX_FLUSH_TIMEOUT / 1000);
1164
1165 /* forcibly flush all Tx buffers on our queues */
1166 for (i = 0; i < WL12XX_MAX_LINKS; i++)
1167 wl1271_tx_reset_link_queues(wl, i);
1168
1169 out_wake:
1170 wlcore_wake_queues(wl, WLCORE_QUEUE_STOP_REASON_FLUSH);
1171 mutex_unlock(&wl->mutex);
1172 out:
1173 mutex_unlock(&wl->flush_mutex);
1174 }
1175 EXPORT_SYMBOL_GPL(wl1271_tx_flush);
1176
1177 u32 wl1271_tx_min_rate_get(struct wl1271 *wl, u32 rate_set)
1178 {
1179 if (WARN_ON(!rate_set))
1180 return 0;
1181
1182 return BIT(__ffs(rate_set));
1183 }
1184 EXPORT_SYMBOL_GPL(wl1271_tx_min_rate_get);
1185
1186 void wlcore_stop_queue_locked(struct wl1271 *wl, struct wl12xx_vif *wlvif,
1187 u8 queue, enum wlcore_queue_stop_reason reason)
1188 {
1189 int hwq = wlcore_tx_get_mac80211_queue(wlvif, queue);
1190 bool stopped = !!wl->queue_stop_reasons[hwq];
1191
1192 /* queue should not be stopped for this reason */
1193 WARN_ON_ONCE(test_and_set_bit(reason, &wl->queue_stop_reasons[hwq]));
1194
1195 if (stopped)
1196 return;
1197
1198 ieee80211_stop_queue(wl->hw, hwq);
1199 }
1200
1201 void wlcore_stop_queue(struct wl1271 *wl, struct wl12xx_vif *wlvif, u8 queue,
1202 enum wlcore_queue_stop_reason reason)
1203 {
1204 unsigned long flags;
1205
1206 spin_lock_irqsave(&wl->wl_lock, flags);
1207 wlcore_stop_queue_locked(wl, wlvif, queue, reason);
1208 spin_unlock_irqrestore(&wl->wl_lock, flags);
1209 }
1210
1211 void wlcore_wake_queue(struct wl1271 *wl, struct wl12xx_vif *wlvif, u8 queue,
1212 enum wlcore_queue_stop_reason reason)
1213 {
1214 unsigned long flags;
1215 int hwq = wlcore_tx_get_mac80211_queue(wlvif, queue);
1216
1217 spin_lock_irqsave(&wl->wl_lock, flags);
1218
1219 /* queue should not be clear for this reason */
1220 WARN_ON_ONCE(!test_and_clear_bit(reason, &wl->queue_stop_reasons[hwq]));
1221
1222 if (wl->queue_stop_reasons[hwq])
1223 goto out;
1224
1225 ieee80211_wake_queue(wl->hw, hwq);
1226
1227 out:
1228 spin_unlock_irqrestore(&wl->wl_lock, flags);
1229 }
1230
1231 void wlcore_stop_queues(struct wl1271 *wl,
1232 enum wlcore_queue_stop_reason reason)
1233 {
1234 int i;
1235 unsigned long flags;
1236
1237 spin_lock_irqsave(&wl->wl_lock, flags);
1238
1239 /* mark all possible queues as stopped */
1240 for (i = 0; i < WLCORE_NUM_MAC_ADDRESSES * NUM_TX_QUEUES; i++)
1241 WARN_ON_ONCE(test_and_set_bit(reason,
1242 &wl->queue_stop_reasons[i]));
1243
1244 /* use the global version to make sure all vifs in mac80211 we don't
1245 * know are stopped.
1246 */
1247 ieee80211_stop_queues(wl->hw);
1248
1249 spin_unlock_irqrestore(&wl->wl_lock, flags);
1250 }
1251
1252 void wlcore_wake_queues(struct wl1271 *wl,
1253 enum wlcore_queue_stop_reason reason)
1254 {
1255 int i;
1256 unsigned long flags;
1257
1258 spin_lock_irqsave(&wl->wl_lock, flags);
1259
1260 /* mark all possible queues as awake */
1261 for (i = 0; i < WLCORE_NUM_MAC_ADDRESSES * NUM_TX_QUEUES; i++)
1262 WARN_ON_ONCE(!test_and_clear_bit(reason,
1263 &wl->queue_stop_reasons[i]));
1264
1265 /* use the global version to make sure all vifs in mac80211 we don't
1266 * know are woken up.
1267 */
1268 ieee80211_wake_queues(wl->hw);
1269
1270 spin_unlock_irqrestore(&wl->wl_lock, flags);
1271 }
1272
1273 bool wlcore_is_queue_stopped_by_reason(struct wl1271 *wl,
1274 struct wl12xx_vif *wlvif, u8 queue,
1275 enum wlcore_queue_stop_reason reason)
1276 {
1277 unsigned long flags;
1278 bool stopped;
1279
1280 spin_lock_irqsave(&wl->wl_lock, flags);
1281 stopped = wlcore_is_queue_stopped_by_reason_locked(wl, wlvif, queue,
1282 reason);
1283 spin_unlock_irqrestore(&wl->wl_lock, flags);
1284
1285 return stopped;
1286 }
1287
1288 bool wlcore_is_queue_stopped_by_reason_locked(struct wl1271 *wl,
1289 struct wl12xx_vif *wlvif, u8 queue,
1290 enum wlcore_queue_stop_reason reason)
1291 {
1292 int hwq = wlcore_tx_get_mac80211_queue(wlvif, queue);
1293
1294 assert_spin_locked(&wl->wl_lock);
1295 return test_bit(reason, &wl->queue_stop_reasons[hwq]);
1296 }
1297
1298 bool wlcore_is_queue_stopped_locked(struct wl1271 *wl, struct wl12xx_vif *wlvif,
1299 u8 queue)
1300 {
1301 int hwq = wlcore_tx_get_mac80211_queue(wlvif, queue);
1302
1303 assert_spin_locked(&wl->wl_lock);
1304 return !!wl->queue_stop_reasons[hwq];
1305 }
Linux with added FPC-III support