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gpio: rcar: Fix runtime PM imbalance on error
[linux/fpc-iii.git] / drivers / net / wireless / ti / wlcore / tx.c
blob90e56d4c3df3bfa37ff811b3149c6a10ea11bd76
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * This file is part of wl1271
4 *
5 * Copyright (C) 2009 Nokia Corporation
6 *
7 * Contact: Luciano Coelho <luciano.coelho@nokia.com>
8 */
9
10 #include <linux/kernel.h>
11 #include <linux/module.h>
12 #include <linux/etherdevice.h>
13 #include <linux/pm_runtime.h>
14 #include <linux/spinlock.h>
15
16 #include "wlcore.h"
17 #include "debug.h"
18 #include "io.h"
19 #include "ps.h"
20 #include "tx.h"
21 #include "event.h"
22 #include "hw_ops.h"
23
24 /*
25 * TODO: this is here just for now, it must be removed when the data
26 * operations are in place.
27 */
28 #include "../wl12xx/reg.h"
29
30 static int wl1271_set_default_wep_key(struct wl1271 *wl,
31 struct wl12xx_vif *wlvif, u8 id)
32 {
33 int ret;
34 bool is_ap = (wlvif->bss_type == BSS_TYPE_AP_BSS);
35
36 if (is_ap)
37 ret = wl12xx_cmd_set_default_wep_key(wl, id,
38 wlvif->ap.bcast_hlid);
39 else
40 ret = wl12xx_cmd_set_default_wep_key(wl, id, wlvif->sta.hlid);
41
42 if (ret < 0)
43 return ret;
44
45 wl1271_debug(DEBUG_CRYPT, "default wep key idx: %d", (int)id);
46 return 0;
47 }
48
49 static int wl1271_alloc_tx_id(struct wl1271 *wl, struct sk_buff *skb)
50 {
51 int id;
52
53 id = find_first_zero_bit(wl->tx_frames_map, wl->num_tx_desc);
54 if (id >= wl->num_tx_desc)
55 return -EBUSY;
56
57 __set_bit(id, wl->tx_frames_map);
58 wl->tx_frames[id] = skb;
59 wl->tx_frames_cnt++;
60 return id;
61 }
62
63 void wl1271_free_tx_id(struct wl1271 *wl, int id)
64 {
65 if (__test_and_clear_bit(id, wl->tx_frames_map)) {
66 if (unlikely(wl->tx_frames_cnt == wl->num_tx_desc))
67 clear_bit(WL1271_FLAG_FW_TX_BUSY, &wl->flags);
68
69 wl->tx_frames[id] = NULL;
70 wl->tx_frames_cnt--;
71 }
72 }
73 EXPORT_SYMBOL(wl1271_free_tx_id);
74
75 static void wl1271_tx_ap_update_inconnection_sta(struct wl1271 *wl,
76 struct wl12xx_vif *wlvif,
77 struct sk_buff *skb)
78 {
79 struct ieee80211_hdr *hdr;
80
81 hdr = (struct ieee80211_hdr *)(skb->data +
82 sizeof(struct wl1271_tx_hw_descr));
83 if (!ieee80211_is_auth(hdr->frame_control))
84 return;
85
86 /*
87 * add the station to the known list before transmitting the
88 * authentication response. this way it won't get de-authed by FW
89 * when transmitting too soon.
90 */
91 wl1271_acx_set_inconnection_sta(wl, wlvif, hdr->addr1);
92
93 /*
94 * ROC for 1 second on the AP channel for completing the connection.
95 * Note the ROC will be continued by the update_sta_state callbacks
96 * once the station reaches the associated state.
97 */
98 wlcore_update_inconn_sta(wl, wlvif, NULL, true);
99 wlvif->pending_auth_reply_time = jiffies;
100 cancel_delayed_work(&wlvif->pending_auth_complete_work);
101 ieee80211_queue_delayed_work(wl->hw,
102 &wlvif->pending_auth_complete_work,
103 msecs_to_jiffies(WLCORE_PEND_AUTH_ROC_TIMEOUT));
104 }
105
106 static void wl1271_tx_regulate_link(struct wl1271 *wl,
107 struct wl12xx_vif *wlvif,
108 u8 hlid)
109 {
110 bool fw_ps;
111 u8 tx_pkts;
112
113 if (WARN_ON(!test_bit(hlid, wlvif->links_map)))
114 return;
115
116 fw_ps = test_bit(hlid, &wl->ap_fw_ps_map);
117 tx_pkts = wl->links[hlid].allocated_pkts;
118
119 /*
120 * if in FW PS and there is enough data in FW we can put the link
121 * into high-level PS and clean out its TX queues.
122 * Make an exception if this is the only connected link. In this
123 * case FW-memory congestion is less of a problem.
124 * Note that a single connected STA means 2*ap_count + 1 active links,
125 * since we must account for the global and broadcast AP links
126 * for each AP. The "fw_ps" check assures us the other link is a STA
127 * connected to the AP. Otherwise the FW would not set the PSM bit.
128 */
129 if (wl->active_link_count > (wl->ap_count*2 + 1) && fw_ps &&
130 tx_pkts >= WL1271_PS_STA_MAX_PACKETS)
131 wl12xx_ps_link_start(wl, wlvif, hlid, true);
132 }
133
134 bool wl12xx_is_dummy_packet(struct wl1271 *wl, struct sk_buff *skb)
135 {
136 return wl->dummy_packet == skb;
137 }
138 EXPORT_SYMBOL(wl12xx_is_dummy_packet);
139
140 static u8 wl12xx_tx_get_hlid_ap(struct wl1271 *wl, struct wl12xx_vif *wlvif,
141 struct sk_buff *skb, struct ieee80211_sta *sta)
142 {
143 if (sta) {
144 struct wl1271_station *wl_sta;
145
146 wl_sta = (struct wl1271_station *)sta->drv_priv;
147 return wl_sta->hlid;
148 } else {
149 struct ieee80211_hdr *hdr;
150
151 if (!test_bit(WLVIF_FLAG_AP_STARTED, &wlvif->flags))
152 return wl->system_hlid;
153
154 hdr = (struct ieee80211_hdr *)skb->data;
155 if (is_multicast_ether_addr(ieee80211_get_DA(hdr)))
156 return wlvif->ap.bcast_hlid;
157 else
158 return wlvif->ap.global_hlid;
159 }
160 }
161
162 u8 wl12xx_tx_get_hlid(struct wl1271 *wl, struct wl12xx_vif *wlvif,
163 struct sk_buff *skb, struct ieee80211_sta *sta)
164 {
165 struct ieee80211_tx_info *control;
166
167 if (wlvif->bss_type == BSS_TYPE_AP_BSS)
168 return wl12xx_tx_get_hlid_ap(wl, wlvif, skb, sta);
169
170 control = IEEE80211_SKB_CB(skb);
171 if (control->flags & IEEE80211_TX_CTL_TX_OFFCHAN) {
172 wl1271_debug(DEBUG_TX, "tx offchannel");
173 return wlvif->dev_hlid;
174 }
175
176 return wlvif->sta.hlid;
177 }
178
179 unsigned int wlcore_calc_packet_alignment(struct wl1271 *wl,
180 unsigned int packet_length)
181 {
182 if ((wl->quirks & WLCORE_QUIRK_TX_PAD_LAST_FRAME) ||
183 !(wl->quirks & WLCORE_QUIRK_TX_BLOCKSIZE_ALIGN))
184 return ALIGN(packet_length, WL1271_TX_ALIGN_TO);
185 else
186 return ALIGN(packet_length, WL12XX_BUS_BLOCK_SIZE);
187 }
188 EXPORT_SYMBOL(wlcore_calc_packet_alignment);
189
190 static int wl1271_tx_allocate(struct wl1271 *wl, struct wl12xx_vif *wlvif,
191 struct sk_buff *skb, u32 extra, u32 buf_offset,
192 u8 hlid, bool is_gem)
193 {
194 struct wl1271_tx_hw_descr *desc;
195 u32 total_len = skb->len + sizeof(struct wl1271_tx_hw_descr) + extra;
196 u32 total_blocks;
197 int id, ret = -EBUSY, ac;
198 u32 spare_blocks;
199
200 if (buf_offset + total_len > wl->aggr_buf_size)
201 return -EAGAIN;
202
203 spare_blocks = wlcore_hw_get_spare_blocks(wl, is_gem);
204
205 /* allocate free identifier for the packet */
206 id = wl1271_alloc_tx_id(wl, skb);
207 if (id < 0)
208 return id;
209
210 total_blocks = wlcore_hw_calc_tx_blocks(wl, total_len, spare_blocks);
211
212 if (total_blocks <= wl->tx_blocks_available) {
213 desc = skb_push(skb, total_len - skb->len);
214
215 wlcore_hw_set_tx_desc_blocks(wl, desc, total_blocks,
216 spare_blocks);
217
218 desc->id = id;
219
220 wl->tx_blocks_available -= total_blocks;
221 wl->tx_allocated_blocks += total_blocks;
222
223 /*
224 * If the FW was empty before, arm the Tx watchdog. Also do
225 * this on the first Tx after resume, as we always cancel the
226 * watchdog on suspend.
227 */
228 if (wl->tx_allocated_blocks == total_blocks ||
229 test_and_clear_bit(WL1271_FLAG_REINIT_TX_WDOG, &wl->flags))
230 wl12xx_rearm_tx_watchdog_locked(wl);
231
232 ac = wl1271_tx_get_queue(skb_get_queue_mapping(skb));
233 wl->tx_allocated_pkts[ac]++;
234
235 if (test_bit(hlid, wl->links_map))
236 wl->links[hlid].allocated_pkts++;
237
238 ret = 0;
239
240 wl1271_debug(DEBUG_TX,
241 "tx_allocate: size: %d, blocks: %d, id: %d",
242 total_len, total_blocks, id);
243 } else {
244 wl1271_free_tx_id(wl, id);
245 }
246
247 return ret;
248 }
249
250 static void wl1271_tx_fill_hdr(struct wl1271 *wl, struct wl12xx_vif *wlvif,
251 struct sk_buff *skb, u32 extra,
252 struct ieee80211_tx_info *control, u8 hlid)
253 {
254 struct wl1271_tx_hw_descr *desc;
255 int ac, rate_idx;
256 s64 hosttime;
257 u16 tx_attr = 0;
258 __le16 frame_control;
259 struct ieee80211_hdr *hdr;
260 u8 *frame_start;
261 bool is_dummy;
262
263 desc = (struct wl1271_tx_hw_descr *) skb->data;
264 frame_start = (u8 *)(desc + 1);
265 hdr = (struct ieee80211_hdr *)(frame_start + extra);
266 frame_control = hdr->frame_control;
267
268 /* relocate space for security header */
269 if (extra) {
270 int hdrlen = ieee80211_hdrlen(frame_control);
271 memmove(frame_start, hdr, hdrlen);
272 skb_set_network_header(skb, skb_network_offset(skb) + extra);
273 }
274
275 /* configure packet life time */
276 hosttime = (ktime_get_boottime_ns() >> 10);
277 desc->start_time = cpu_to_le32(hosttime - wl->time_offset);
278
279 is_dummy = wl12xx_is_dummy_packet(wl, skb);
280 if (is_dummy || !wlvif || wlvif->bss_type != BSS_TYPE_AP_BSS)
281 desc->life_time = cpu_to_le16(TX_HW_MGMT_PKT_LIFETIME_TU);
282 else
283 desc->life_time = cpu_to_le16(TX_HW_AP_MODE_PKT_LIFETIME_TU);
284
285 /* queue */
286 ac = wl1271_tx_get_queue(skb_get_queue_mapping(skb));
287 desc->tid = skb->priority;
288
289 if (is_dummy) {
290 /*
291 * FW expects the dummy packet to have an invalid session id -
292 * any session id that is different than the one set in the join
293 */
294 tx_attr = (SESSION_COUNTER_INVALID <<
295 TX_HW_ATTR_OFST_SESSION_COUNTER) &
296 TX_HW_ATTR_SESSION_COUNTER;
297
298 tx_attr |= TX_HW_ATTR_TX_DUMMY_REQ;
299 } else if (wlvif) {
300 u8 session_id = wl->session_ids[hlid];
301
302 if ((wl->quirks & WLCORE_QUIRK_AP_ZERO_SESSION_ID) &&
303 (wlvif->bss_type == BSS_TYPE_AP_BSS))
304 session_id = 0;
305
306 /* configure the tx attributes */
307 tx_attr = session_id << TX_HW_ATTR_OFST_SESSION_COUNTER;
308 }
309
310 desc->hlid = hlid;
311 if (is_dummy || !wlvif)
312 rate_idx = 0;
313 else if (wlvif->bss_type != BSS_TYPE_AP_BSS) {
314 /*
315 * if the packets are data packets
316 * send them with AP rate policies (EAPOLs are an exception),
317 * otherwise use default basic rates
318 */
319 if (skb->protocol == cpu_to_be16(ETH_P_PAE))
320 rate_idx = wlvif->sta.basic_rate_idx;
321 else if (control->flags & IEEE80211_TX_CTL_NO_CCK_RATE)
322 rate_idx = wlvif->sta.p2p_rate_idx;
323 else if (ieee80211_is_data(frame_control))
324 rate_idx = wlvif->sta.ap_rate_idx;
325 else
326 rate_idx = wlvif->sta.basic_rate_idx;
327 } else {
328 if (hlid == wlvif->ap.global_hlid)
329 rate_idx = wlvif->ap.mgmt_rate_idx;
330 else if (hlid == wlvif->ap.bcast_hlid ||
331 skb->protocol == cpu_to_be16(ETH_P_PAE) ||
332 !ieee80211_is_data(frame_control))
333 /*
334 * send non-data, bcast and EAPOLs using the
335 * min basic rate
336 */
337 rate_idx = wlvif->ap.bcast_rate_idx;
338 else
339 rate_idx = wlvif->ap.ucast_rate_idx[ac];
340 }
341
342 tx_attr |= rate_idx << TX_HW_ATTR_OFST_RATE_POLICY;
343
344 /* for WEP shared auth - no fw encryption is needed */
345 if (ieee80211_is_auth(frame_control) &&
346 ieee80211_has_protected(frame_control))
347 tx_attr |= TX_HW_ATTR_HOST_ENCRYPT;
348
349 /* send EAPOL frames as voice */
350 if (control->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO)
351 tx_attr |= TX_HW_ATTR_EAPOL_FRAME;
352
353 desc->tx_attr = cpu_to_le16(tx_attr);
354
355 wlcore_hw_set_tx_desc_csum(wl, desc, skb);
356 wlcore_hw_set_tx_desc_data_len(wl, desc, skb);
357 }
358
359 /* caller must hold wl->mutex */
360 static int wl1271_prepare_tx_frame(struct wl1271 *wl, struct wl12xx_vif *wlvif,
361 struct sk_buff *skb, u32 buf_offset, u8 hlid)
362 {
363 struct ieee80211_tx_info *info;
364 u32 extra = 0;
365 int ret = 0;
366 u32 total_len;
367 bool is_dummy;
368 bool is_gem = false;
369
370 if (!skb) {
371 wl1271_error("discarding null skb");
372 return -EINVAL;
373 }
374
375 if (hlid == WL12XX_INVALID_LINK_ID) {
376 wl1271_error("invalid hlid. dropping skb 0x%p", skb);
377 return -EINVAL;
378 }
379
380 info = IEEE80211_SKB_CB(skb);
381
382 is_dummy = wl12xx_is_dummy_packet(wl, skb);
383
384 if ((wl->quirks & WLCORE_QUIRK_TKIP_HEADER_SPACE) &&
385 info->control.hw_key &&
386 info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP)
387 extra = WL1271_EXTRA_SPACE_TKIP;
388
389 if (info->control.hw_key) {
390 bool is_wep;
391 u8 idx = info->control.hw_key->hw_key_idx;
392 u32 cipher = info->control.hw_key->cipher;
393
394 is_wep = (cipher == WLAN_CIPHER_SUITE_WEP40) ||
395 (cipher == WLAN_CIPHER_SUITE_WEP104);
396
397 if (WARN_ON(is_wep && wlvif && wlvif->default_key != idx)) {
398 ret = wl1271_set_default_wep_key(wl, wlvif, idx);
399 if (ret < 0)
400 return ret;
401 wlvif->default_key = idx;
402 }
403
404 is_gem = (cipher == WL1271_CIPHER_SUITE_GEM);
405 }
406
407 ret = wl1271_tx_allocate(wl, wlvif, skb, extra, buf_offset, hlid,
408 is_gem);
409 if (ret < 0)
410 return ret;
411
412 wl1271_tx_fill_hdr(wl, wlvif, skb, extra, info, hlid);
413
414 if (!is_dummy && wlvif && wlvif->bss_type == BSS_TYPE_AP_BSS) {
415 wl1271_tx_ap_update_inconnection_sta(wl, wlvif, skb);
416 wl1271_tx_regulate_link(wl, wlvif, hlid);
417 }
418
419 /*
420 * The length of each packet is stored in terms of
421 * words. Thus, we must pad the skb data to make sure its
422 * length is aligned. The number of padding bytes is computed
423 * and set in wl1271_tx_fill_hdr.
424 * In special cases, we want to align to a specific block size
425 * (eg. for wl128x with SDIO we align to 256).
426 */
427 total_len = wlcore_calc_packet_alignment(wl, skb->len);
428
429 memcpy(wl->aggr_buf + buf_offset, skb->data, skb->len);
430 memset(wl->aggr_buf + buf_offset + skb->len, 0, total_len - skb->len);
431
432 /* Revert side effects in the dummy packet skb, so it can be reused */
433 if (is_dummy)
434 skb_pull(skb, sizeof(struct wl1271_tx_hw_descr));
435
436 return total_len;
437 }
438
439 u32 wl1271_tx_enabled_rates_get(struct wl1271 *wl, u32 rate_set,
440 enum nl80211_band rate_band)
441 {
442 struct ieee80211_supported_band *band;
443 u32 enabled_rates = 0;
444 int bit;
445
446 band = wl->hw->wiphy->bands[rate_band];
447 for (bit = 0; bit < band->n_bitrates; bit++) {
448 if (rate_set & 0x1)
449 enabled_rates |= band->bitrates[bit].hw_value;
450 rate_set >>= 1;
451 }
452
453 /* MCS rates indication are on bits 16 - 31 */
454 rate_set >>= HW_HT_RATES_OFFSET - band->n_bitrates;
455
456 for (bit = 0; bit < 16; bit++) {
457 if (rate_set & 0x1)
458 enabled_rates |= (CONF_HW_BIT_RATE_MCS_0 << bit);
459 rate_set >>= 1;
460 }
461
462 return enabled_rates;
463 }
464
465 void wl1271_handle_tx_low_watermark(struct wl1271 *wl)
466 {
467 int i;
468 struct wl12xx_vif *wlvif;
469
470 wl12xx_for_each_wlvif(wl, wlvif) {
471 for (i = 0; i < NUM_TX_QUEUES; i++) {
472 if (wlcore_is_queue_stopped_by_reason(wl, wlvif, i,
473 WLCORE_QUEUE_STOP_REASON_WATERMARK) &&
474 wlvif->tx_queue_count[i] <=
475 WL1271_TX_QUEUE_LOW_WATERMARK)
476 /* firmware buffer has space, restart queues */
477 wlcore_wake_queue(wl, wlvif, i,
478 WLCORE_QUEUE_STOP_REASON_WATERMARK);
479 }
480 }
481 }
482
483 static int wlcore_select_ac(struct wl1271 *wl)
484 {
485 int i, q = -1, ac;
486 u32 min_pkts = 0xffffffff;
487
488 /*
489 * Find a non-empty ac where:
490 * 1. There are packets to transmit
491 * 2. The FW has the least allocated blocks
492 *
493 * We prioritize the ACs according to VO>VI>BE>BK
494 */
495 for (i = 0; i < NUM_TX_QUEUES; i++) {
496 ac = wl1271_tx_get_queue(i);
497 if (wl->tx_queue_count[ac] &&
498 wl->tx_allocated_pkts[ac] < min_pkts) {
499 q = ac;
500 min_pkts = wl->tx_allocated_pkts[q];
501 }
502 }
503
504 return q;
505 }
506
507 static struct sk_buff *wlcore_lnk_dequeue(struct wl1271 *wl,
508 struct wl1271_link *lnk, u8 q)
509 {
510 struct sk_buff *skb;
511 unsigned long flags;
512
513 skb = skb_dequeue(&lnk->tx_queue[q]);
514 if (skb) {
515 spin_lock_irqsave(&wl->wl_lock, flags);
516 WARN_ON_ONCE(wl->tx_queue_count[q] <= 0);
517 wl->tx_queue_count[q]--;
518 if (lnk->wlvif) {
519 WARN_ON_ONCE(lnk->wlvif->tx_queue_count[q] <= 0);
520 lnk->wlvif->tx_queue_count[q]--;
521 }
522 spin_unlock_irqrestore(&wl->wl_lock, flags);
523 }
524
525 return skb;
526 }
527
528 static struct sk_buff *wlcore_lnk_dequeue_high_prio(struct wl1271 *wl,
529 u8 hlid, u8 ac,
530 u8 *low_prio_hlid)
531 {
532 struct wl1271_link *lnk = &wl->links[hlid];
533
534 if (!wlcore_hw_lnk_high_prio(wl, hlid, lnk)) {
535 if (*low_prio_hlid == WL12XX_INVALID_LINK_ID &&
536 !skb_queue_empty(&lnk->tx_queue[ac]) &&
537 wlcore_hw_lnk_low_prio(wl, hlid, lnk))
538 /* we found the first non-empty low priority queue */
539 *low_prio_hlid = hlid;
540
541 return NULL;
542 }
543
544 return wlcore_lnk_dequeue(wl, lnk, ac);
545 }
546
547 static struct sk_buff *wlcore_vif_dequeue_high_prio(struct wl1271 *wl,
548 struct wl12xx_vif *wlvif,
549 u8 ac, u8 *hlid,
550 u8 *low_prio_hlid)
551 {
552 struct sk_buff *skb = NULL;
553 int i, h, start_hlid;
554
555 /* start from the link after the last one */
556 start_hlid = (wlvif->last_tx_hlid + 1) % wl->num_links;
557
558 /* dequeue according to AC, round robin on each link */
559 for (i = 0; i < wl->num_links; i++) {
560 h = (start_hlid + i) % wl->num_links;
561
562 /* only consider connected stations */
563 if (!test_bit(h, wlvif->links_map))
564 continue;
565
566 skb = wlcore_lnk_dequeue_high_prio(wl, h, ac,
567 low_prio_hlid);
568 if (!skb)
569 continue;
570
571 wlvif->last_tx_hlid = h;
572 break;
573 }
574
575 if (!skb)
576 wlvif->last_tx_hlid = 0;
577
578 *hlid = wlvif->last_tx_hlid;
579 return skb;
580 }
581
582 static struct sk_buff *wl1271_skb_dequeue(struct wl1271 *wl, u8 *hlid)
583 {
584 unsigned long flags;
585 struct wl12xx_vif *wlvif = wl->last_wlvif;
586 struct sk_buff *skb = NULL;
587 int ac;
588 u8 low_prio_hlid = WL12XX_INVALID_LINK_ID;
589
590 ac = wlcore_select_ac(wl);
591 if (ac < 0)
592 goto out;
593
594 /* continue from last wlvif (round robin) */
595 if (wlvif) {
596 wl12xx_for_each_wlvif_continue(wl, wlvif) {
597 if (!wlvif->tx_queue_count[ac])
598 continue;
599
600 skb = wlcore_vif_dequeue_high_prio(wl, wlvif, ac, hlid,
601 &low_prio_hlid);
602 if (!skb)
603 continue;
604
605 wl->last_wlvif = wlvif;
606 break;
607 }
608 }
609
610 /* dequeue from the system HLID before the restarting wlvif list */
611 if (!skb) {
612 skb = wlcore_lnk_dequeue_high_prio(wl, wl->system_hlid,
613 ac, &low_prio_hlid);
614 if (skb) {
615 *hlid = wl->system_hlid;
616 wl->last_wlvif = NULL;
617 }
618 }
619
620 /* Do a new pass over the wlvif list. But no need to continue
621 * after last_wlvif. The previous pass should have found it. */
622 if (!skb) {
623 wl12xx_for_each_wlvif(wl, wlvif) {
624 if (!wlvif->tx_queue_count[ac])
625 goto next;
626
627 skb = wlcore_vif_dequeue_high_prio(wl, wlvif, ac, hlid,
628 &low_prio_hlid);
629 if (skb) {
630 wl->last_wlvif = wlvif;
631 break;
632 }
633
634 next:
635 if (wlvif == wl->last_wlvif)
636 break;
637 }
638 }
639
640 /* no high priority skbs found - but maybe a low priority one? */
641 if (!skb && low_prio_hlid != WL12XX_INVALID_LINK_ID) {
642 struct wl1271_link *lnk = &wl->links[low_prio_hlid];
643 skb = wlcore_lnk_dequeue(wl, lnk, ac);
644
645 WARN_ON(!skb); /* we checked this before */
646 *hlid = low_prio_hlid;
647
648 /* ensure proper round robin in the vif/link levels */
649 wl->last_wlvif = lnk->wlvif;
650 if (lnk->wlvif)
651 lnk->wlvif->last_tx_hlid = low_prio_hlid;
652
653 }
654
655 out:
656 if (!skb &&
657 test_and_clear_bit(WL1271_FLAG_DUMMY_PACKET_PENDING, &wl->flags)) {
658 int q;
659
660 skb = wl->dummy_packet;
661 *hlid = wl->system_hlid;
662 q = wl1271_tx_get_queue(skb_get_queue_mapping(skb));
663 spin_lock_irqsave(&wl->wl_lock, flags);
664 WARN_ON_ONCE(wl->tx_queue_count[q] <= 0);
665 wl->tx_queue_count[q]--;
666 spin_unlock_irqrestore(&wl->wl_lock, flags);
667 }
668
669 return skb;
670 }
671
672 static void wl1271_skb_queue_head(struct wl1271 *wl, struct wl12xx_vif *wlvif,
673 struct sk_buff *skb, u8 hlid)
674 {
675 unsigned long flags;
676 int q = wl1271_tx_get_queue(skb_get_queue_mapping(skb));
677
678 if (wl12xx_is_dummy_packet(wl, skb)) {
679 set_bit(WL1271_FLAG_DUMMY_PACKET_PENDING, &wl->flags);
680 } else {
681 skb_queue_head(&wl->links[hlid].tx_queue[q], skb);
682
683 /* make sure we dequeue the same packet next time */
684 wlvif->last_tx_hlid = (hlid + wl->num_links - 1) %
685 wl->num_links;
686 }
687
688 spin_lock_irqsave(&wl->wl_lock, flags);
689 wl->tx_queue_count[q]++;
690 if (wlvif)
691 wlvif->tx_queue_count[q]++;
692 spin_unlock_irqrestore(&wl->wl_lock, flags);
693 }
694
695 static bool wl1271_tx_is_data_present(struct sk_buff *skb)
696 {
697 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
698
699 return ieee80211_is_data_present(hdr->frame_control);
700 }
701
702 void wl12xx_rearm_rx_streaming(struct wl1271 *wl, unsigned long *active_hlids)
703 {
704 struct wl12xx_vif *wlvif;
705 u32 timeout;
706 u8 hlid;
707
708 if (!wl->conf.rx_streaming.interval)
709 return;
710
711 if (!wl->conf.rx_streaming.always &&
712 !test_bit(WL1271_FLAG_SOFT_GEMINI, &wl->flags))
713 return;
714
715 timeout = wl->conf.rx_streaming.duration;
716 wl12xx_for_each_wlvif_sta(wl, wlvif) {
717 bool found = false;
718 for_each_set_bit(hlid, active_hlids, wl->num_links) {
719 if (test_bit(hlid, wlvif->links_map)) {
720 found = true;
721 break;
722 }
723 }
724
725 if (!found)
726 continue;
727
728 /* enable rx streaming */
729 if (!test_bit(WLVIF_FLAG_RX_STREAMING_STARTED, &wlvif->flags))
730 ieee80211_queue_work(wl->hw,
731 &wlvif->rx_streaming_enable_work);
732
733 mod_timer(&wlvif->rx_streaming_timer,
734 jiffies + msecs_to_jiffies(timeout));
735 }
736 }
737
738 /*
739 * Returns failure values only in case of failed bus ops within this function.
740 * wl1271_prepare_tx_frame retvals won't be returned in order to avoid
741 * triggering recovery by higher layers when not necessary.
742 * In case a FW command fails within wl1271_prepare_tx_frame fails a recovery
743 * will be queued in wl1271_cmd_send. -EAGAIN/-EBUSY from prepare_tx_frame
744 * can occur and are legitimate so don't propagate. -EINVAL will emit a WARNING
745 * within prepare_tx_frame code but there's nothing we should do about those
746 * as well.
747 */
748 int wlcore_tx_work_locked(struct wl1271 *wl)
749 {
750 struct wl12xx_vif *wlvif;
751 struct sk_buff *skb;
752 struct wl1271_tx_hw_descr *desc;
753 u32 buf_offset = 0, last_len = 0;
754 bool sent_packets = false;
755 unsigned long active_hlids[BITS_TO_LONGS(WLCORE_MAX_LINKS)] = {0};
756 int ret = 0;
757 int bus_ret = 0;
758 u8 hlid;
759
760 if (unlikely(wl->state != WLCORE_STATE_ON))
761 return 0;
762
763 while ((skb = wl1271_skb_dequeue(wl, &hlid))) {
764 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
765 bool has_data = false;
766
767 wlvif = NULL;
768 if (!wl12xx_is_dummy_packet(wl, skb))
769 wlvif = wl12xx_vif_to_data(info->control.vif);
770 else
771 hlid = wl->system_hlid;
772
773 has_data = wlvif && wl1271_tx_is_data_present(skb);
774 ret = wl1271_prepare_tx_frame(wl, wlvif, skb, buf_offset,
775 hlid);
776 if (ret == -EAGAIN) {
777 /*
778 * Aggregation buffer is full.
779 * Flush buffer and try again.
780 */
781 wl1271_skb_queue_head(wl, wlvif, skb, hlid);
782
783 buf_offset = wlcore_hw_pre_pkt_send(wl, buf_offset,
784 last_len);
785 bus_ret = wlcore_write_data(wl, REG_SLV_MEM_DATA,
786 wl->aggr_buf, buf_offset, true);
787 if (bus_ret < 0)
788 goto out;
789
790 sent_packets = true;
791 buf_offset = 0;
792 continue;
793 } else if (ret == -EBUSY) {
794 /*
795 * Firmware buffer is full.
796 * Queue back last skb, and stop aggregating.
797 */
798 wl1271_skb_queue_head(wl, wlvif, skb, hlid);
799 /* No work left, avoid scheduling redundant tx work */
800 set_bit(WL1271_FLAG_FW_TX_BUSY, &wl->flags);
801 goto out_ack;
802 } else if (ret < 0) {
803 if (wl12xx_is_dummy_packet(wl, skb))
804 /*
805 * fw still expects dummy packet,
806 * so re-enqueue it
807 */
808 wl1271_skb_queue_head(wl, wlvif, skb, hlid);
809 else
810 ieee80211_free_txskb(wl->hw, skb);
811 goto out_ack;
812 }
813 last_len = ret;
814 buf_offset += last_len;
815 wl->tx_packets_count++;
816 if (has_data) {
817 desc = (struct wl1271_tx_hw_descr *) skb->data;
818 __set_bit(desc->hlid, active_hlids);
819 }
820 }
821
822 out_ack:
823 if (buf_offset) {
824 buf_offset = wlcore_hw_pre_pkt_send(wl, buf_offset, last_len);
825 bus_ret = wlcore_write_data(wl, REG_SLV_MEM_DATA, wl->aggr_buf,
826 buf_offset, true);
827 if (bus_ret < 0)
828 goto out;
829
830 sent_packets = true;
831 }
832 if (sent_packets) {
833 /*
834 * Interrupt the firmware with the new packets. This is only
835 * required for older hardware revisions
836 */
837 if (wl->quirks & WLCORE_QUIRK_END_OF_TRANSACTION) {
838 bus_ret = wlcore_write32(wl, WL12XX_HOST_WR_ACCESS,
839 wl->tx_packets_count);
840 if (bus_ret < 0)
841 goto out;
842 }
843
844 wl1271_handle_tx_low_watermark(wl);
845 }
846 wl12xx_rearm_rx_streaming(wl, active_hlids);
847
848 out:
849 return bus_ret;
850 }
851
852 void wl1271_tx_work(struct work_struct *work)
853 {
854 struct wl1271 *wl = container_of(work, struct wl1271, tx_work);
855 int ret;
856
857 mutex_lock(&wl->mutex);
858 ret = pm_runtime_get_sync(wl->dev);
859 if (ret < 0) {
860 pm_runtime_put_noidle(wl->dev);
861 goto out;
862 }
863
864 ret = wlcore_tx_work_locked(wl);
865 if (ret < 0) {
866 wl12xx_queue_recovery_work(wl);
867 goto out;
868 }
869
870 pm_runtime_mark_last_busy(wl->dev);
871 pm_runtime_put_autosuspend(wl->dev);
872 out:
873 mutex_unlock(&wl->mutex);
874 }
875
876 static u8 wl1271_tx_get_rate_flags(u8 rate_class_index)
877 {
878 u8 flags = 0;
879
880 /*
881 * TODO: use wl12xx constants when this code is moved to wl12xx, as
882 * only it uses Tx-completion.
883 */
884 if (rate_class_index <= 8)
885 flags |= IEEE80211_TX_RC_MCS;
886
887 /*
888 * TODO: use wl12xx constants when this code is moved to wl12xx, as
889 * only it uses Tx-completion.
890 */
891 if (rate_class_index == 0)
892 flags |= IEEE80211_TX_RC_SHORT_GI;
893
894 return flags;
895 }
896
897 static void wl1271_tx_complete_packet(struct wl1271 *wl,
898 struct wl1271_tx_hw_res_descr *result)
899 {
900 struct ieee80211_tx_info *info;
901 struct ieee80211_vif *vif;
902 struct wl12xx_vif *wlvif;
903 struct sk_buff *skb;
904 int id = result->id;
905 int rate = -1;
906 u8 rate_flags = 0;
907 u8 retries = 0;
908
909 /* check for id legality */
910 if (unlikely(id >= wl->num_tx_desc || wl->tx_frames[id] == NULL)) {
911 wl1271_warning("TX result illegal id: %d", id);
912 return;
913 }
914
915 skb = wl->tx_frames[id];
916 info = IEEE80211_SKB_CB(skb);
917
918 if (wl12xx_is_dummy_packet(wl, skb)) {
919 wl1271_free_tx_id(wl, id);
920 return;
921 }
922
923 /* info->control is valid as long as we don't update info->status */
924 vif = info->control.vif;
925 wlvif = wl12xx_vif_to_data(vif);
926
927 /* update the TX status info */
928 if (result->status == TX_SUCCESS) {
929 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
930 info->flags |= IEEE80211_TX_STAT_ACK;
931 rate = wlcore_rate_to_idx(wl, result->rate_class_index,
932 wlvif->band);
933 rate_flags = wl1271_tx_get_rate_flags(result->rate_class_index);
934 retries = result->ack_failures;
935 } else if (result->status == TX_RETRY_EXCEEDED) {
936 wl->stats.excessive_retries++;
937 retries = result->ack_failures;
938 }
939
940 info->status.rates[0].idx = rate;
941 info->status.rates[0].count = retries;
942 info->status.rates[0].flags = rate_flags;
943 info->status.ack_signal = -1;
944
945 wl->stats.retry_count += result->ack_failures;
946
947 /* remove private header from packet */
948 skb_pull(skb, sizeof(struct wl1271_tx_hw_descr));
949
950 /* remove TKIP header space if present */
951 if ((wl->quirks & WLCORE_QUIRK_TKIP_HEADER_SPACE) &&
952 info->control.hw_key &&
953 info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP) {
954 int hdrlen = ieee80211_get_hdrlen_from_skb(skb);
955 memmove(skb->data + WL1271_EXTRA_SPACE_TKIP, skb->data,
956 hdrlen);
957 skb_pull(skb, WL1271_EXTRA_SPACE_TKIP);
958 }
959
960 wl1271_debug(DEBUG_TX, "tx status id %u skb 0x%p failures %u rate 0x%x"
961 " status 0x%x",
962 result->id, skb, result->ack_failures,
963 result->rate_class_index, result->status);
964
965 /* return the packet to the stack */
966 skb_queue_tail(&wl->deferred_tx_queue, skb);
967 queue_work(wl->freezable_wq, &wl->netstack_work);
968 wl1271_free_tx_id(wl, result->id);
969 }
970
971 /* Called upon reception of a TX complete interrupt */
972 int wlcore_tx_complete(struct wl1271 *wl)
973 {
974 struct wl1271_acx_mem_map *memmap = wl->target_mem_map;
975 u32 count, fw_counter;
976 u32 i;
977 int ret;
978
979 /* read the tx results from the chipset */
980 ret = wlcore_read(wl, le32_to_cpu(memmap->tx_result),
981 wl->tx_res_if, sizeof(*wl->tx_res_if), false);
982 if (ret < 0)
983 goto out;
984
985 fw_counter = le32_to_cpu(wl->tx_res_if->tx_result_fw_counter);
986
987 /* write host counter to chipset (to ack) */
988 ret = wlcore_write32(wl, le32_to_cpu(memmap->tx_result) +
989 offsetof(struct wl1271_tx_hw_res_if,
990 tx_result_host_counter), fw_counter);
991 if (ret < 0)
992 goto out;
993
994 count = fw_counter - wl->tx_results_count;
995 wl1271_debug(DEBUG_TX, "tx_complete received, packets: %d", count);
996
997 /* verify that the result buffer is not getting overrun */
998 if (unlikely(count > TX_HW_RESULT_QUEUE_LEN))
999 wl1271_warning("TX result overflow from chipset: %d", count);
1000
1001 /* process the results */
1002 for (i = 0; i < count; i++) {
1003 struct wl1271_tx_hw_res_descr *result;
1004 u8 offset = wl->tx_results_count & TX_HW_RESULT_QUEUE_LEN_MASK;
1005
1006 /* process the packet */
1007 result = &(wl->tx_res_if->tx_results_queue[offset]);
1008 wl1271_tx_complete_packet(wl, result);
1009
1010 wl->tx_results_count++;
1011 }
1012
1013 out:
1014 return ret;
1015 }
1016 EXPORT_SYMBOL(wlcore_tx_complete);
1017
1018 void wl1271_tx_reset_link_queues(struct wl1271 *wl, u8 hlid)
1019 {
1020 struct sk_buff *skb;
1021 int i;
1022 unsigned long flags;
1023 struct ieee80211_tx_info *info;
1024 int total[NUM_TX_QUEUES];
1025 struct wl1271_link *lnk = &wl->links[hlid];
1026
1027 for (i = 0; i < NUM_TX_QUEUES; i++) {
1028 total[i] = 0;
1029 while ((skb = skb_dequeue(&lnk->tx_queue[i]))) {
1030 wl1271_debug(DEBUG_TX, "link freeing skb 0x%p", skb);
1031
1032 if (!wl12xx_is_dummy_packet(wl, skb)) {
1033 info = IEEE80211_SKB_CB(skb);
1034 info->status.rates[0].idx = -1;
1035 info->status.rates[0].count = 0;
1036 ieee80211_tx_status_ni(wl->hw, skb);
1037 }
1038
1039 total[i]++;
1040 }
1041 }
1042
1043 spin_lock_irqsave(&wl->wl_lock, flags);
1044 for (i = 0; i < NUM_TX_QUEUES; i++) {
1045 wl->tx_queue_count[i] -= total[i];
1046 if (lnk->wlvif)
1047 lnk->wlvif->tx_queue_count[i] -= total[i];
1048 }
1049 spin_unlock_irqrestore(&wl->wl_lock, flags);
1050
1051 wl1271_handle_tx_low_watermark(wl);
1052 }
1053
1054 /* caller must hold wl->mutex and TX must be stopped */
1055 void wl12xx_tx_reset_wlvif(struct wl1271 *wl, struct wl12xx_vif *wlvif)
1056 {
1057 int i;
1058
1059 /* TX failure */
1060 for_each_set_bit(i, wlvif->links_map, wl->num_links) {
1061 if (wlvif->bss_type == BSS_TYPE_AP_BSS &&
1062 i != wlvif->ap.bcast_hlid && i != wlvif->ap.global_hlid) {
1063 /* this calls wl12xx_free_link */
1064 wl1271_free_sta(wl, wlvif, i);
1065 } else {
1066 u8 hlid = i;
1067 wl12xx_free_link(wl, wlvif, &hlid);
1068 }
1069 }
1070 wlvif->last_tx_hlid = 0;
1071
1072 for (i = 0; i < NUM_TX_QUEUES; i++)
1073 wlvif->tx_queue_count[i] = 0;
1074 }
1075 /* caller must hold wl->mutex and TX must be stopped */
1076 void wl12xx_tx_reset(struct wl1271 *wl)
1077 {
1078 int i;
1079 struct sk_buff *skb;
1080 struct ieee80211_tx_info *info;
1081
1082 /* only reset the queues if something bad happened */
1083 if (wl1271_tx_total_queue_count(wl) != 0) {
1084 for (i = 0; i < wl->num_links; i++)
1085 wl1271_tx_reset_link_queues(wl, i);
1086
1087 for (i = 0; i < NUM_TX_QUEUES; i++)
1088 wl->tx_queue_count[i] = 0;
1089 }
1090
1091 /*
1092 * Make sure the driver is at a consistent state, in case this
1093 * function is called from a context other than interface removal.
1094 * This call will always wake the TX queues.
1095 */
1096 wl1271_handle_tx_low_watermark(wl);
1097
1098 for (i = 0; i < wl->num_tx_desc; i++) {
1099 if (wl->tx_frames[i] == NULL)
1100 continue;
1101
1102 skb = wl->tx_frames[i];
1103 wl1271_free_tx_id(wl, i);
1104 wl1271_debug(DEBUG_TX, "freeing skb 0x%p", skb);
1105
1106 if (!wl12xx_is_dummy_packet(wl, skb)) {
1107 /*
1108 * Remove private headers before passing the skb to
1109 * mac80211
1110 */
1111 info = IEEE80211_SKB_CB(skb);
1112 skb_pull(skb, sizeof(struct wl1271_tx_hw_descr));
1113 if ((wl->quirks & WLCORE_QUIRK_TKIP_HEADER_SPACE) &&
1114 info->control.hw_key &&
1115 info->control.hw_key->cipher ==
1116 WLAN_CIPHER_SUITE_TKIP) {
1117 int hdrlen = ieee80211_get_hdrlen_from_skb(skb);
1118 memmove(skb->data + WL1271_EXTRA_SPACE_TKIP,
1119 skb->data, hdrlen);
1120 skb_pull(skb, WL1271_EXTRA_SPACE_TKIP);
1121 }
1122
1123 info->status.rates[0].idx = -1;
1124 info->status.rates[0].count = 0;
1125
1126 ieee80211_tx_status_ni(wl->hw, skb);
1127 }
1128 }
1129 }
1130
1131 #define WL1271_TX_FLUSH_TIMEOUT 500000
1132
1133 /* caller must *NOT* hold wl->mutex */
1134 void wl1271_tx_flush(struct wl1271 *wl)
1135 {
1136 unsigned long timeout, start_time;
1137 int i;
1138 start_time = jiffies;
1139 timeout = start_time + usecs_to_jiffies(WL1271_TX_FLUSH_TIMEOUT);
1140
1141 /* only one flush should be in progress, for consistent queue state */
1142 mutex_lock(&wl->flush_mutex);
1143
1144 mutex_lock(&wl->mutex);
1145 if (wl->tx_frames_cnt == 0 && wl1271_tx_total_queue_count(wl) == 0) {
1146 mutex_unlock(&wl->mutex);
1147 goto out;
1148 }
1149
1150 wlcore_stop_queues(wl, WLCORE_QUEUE_STOP_REASON_FLUSH);
1151
1152 while (!time_after(jiffies, timeout)) {
1153 wl1271_debug(DEBUG_MAC80211, "flushing tx buffer: %d %d",
1154 wl->tx_frames_cnt,
1155 wl1271_tx_total_queue_count(wl));
1156
1157 /* force Tx and give the driver some time to flush data */
1158 mutex_unlock(&wl->mutex);
1159 if (wl1271_tx_total_queue_count(wl))
1160 wl1271_tx_work(&wl->tx_work);
1161 msleep(20);
1162 mutex_lock(&wl->mutex);
1163
1164 if ((wl->tx_frames_cnt == 0) &&
1165 (wl1271_tx_total_queue_count(wl) == 0)) {
1166 wl1271_debug(DEBUG_MAC80211, "tx flush took %d ms",
1167 jiffies_to_msecs(jiffies - start_time));
1168 goto out_wake;
1169 }
1170 }
1171
1172 wl1271_warning("Unable to flush all TX buffers, "
1173 "timed out (timeout %d ms",
1174 WL1271_TX_FLUSH_TIMEOUT / 1000);
1175
1176 /* forcibly flush all Tx buffers on our queues */
1177 for (i = 0; i < wl->num_links; i++)
1178 wl1271_tx_reset_link_queues(wl, i);
1179
1180 out_wake:
1181 wlcore_wake_queues(wl, WLCORE_QUEUE_STOP_REASON_FLUSH);
1182 mutex_unlock(&wl->mutex);
1183 out:
1184 mutex_unlock(&wl->flush_mutex);
1185 }
1186 EXPORT_SYMBOL_GPL(wl1271_tx_flush);
1187
1188 u32 wl1271_tx_min_rate_get(struct wl1271 *wl, u32 rate_set)
1189 {
1190 if (WARN_ON(!rate_set))
1191 return 0;
1192
1193 return BIT(__ffs(rate_set));
1194 }
1195 EXPORT_SYMBOL_GPL(wl1271_tx_min_rate_get);
1196
1197 void wlcore_stop_queue_locked(struct wl1271 *wl, struct wl12xx_vif *wlvif,
1198 u8 queue, enum wlcore_queue_stop_reason reason)
1199 {
1200 int hwq = wlcore_tx_get_mac80211_queue(wlvif, queue);
1201 bool stopped = !!wl->queue_stop_reasons[hwq];
1202
1203 /* queue should not be stopped for this reason */
1204 WARN_ON_ONCE(test_and_set_bit(reason, &wl->queue_stop_reasons[hwq]));
1205
1206 if (stopped)
1207 return;
1208
1209 ieee80211_stop_queue(wl->hw, hwq);
1210 }
1211
1212 void wlcore_stop_queue(struct wl1271 *wl, struct wl12xx_vif *wlvif, u8 queue,
1213 enum wlcore_queue_stop_reason reason)
1214 {
1215 unsigned long flags;
1216
1217 spin_lock_irqsave(&wl->wl_lock, flags);
1218 wlcore_stop_queue_locked(wl, wlvif, queue, reason);
1219 spin_unlock_irqrestore(&wl->wl_lock, flags);
1220 }
1221
1222 void wlcore_wake_queue(struct wl1271 *wl, struct wl12xx_vif *wlvif, u8 queue,
1223 enum wlcore_queue_stop_reason reason)
1224 {
1225 unsigned long flags;
1226 int hwq = wlcore_tx_get_mac80211_queue(wlvif, queue);
1227
1228 spin_lock_irqsave(&wl->wl_lock, flags);
1229
1230 /* queue should not be clear for this reason */
1231 WARN_ON_ONCE(!test_and_clear_bit(reason, &wl->queue_stop_reasons[hwq]));
1232
1233 if (wl->queue_stop_reasons[hwq])
1234 goto out;
1235
1236 ieee80211_wake_queue(wl->hw, hwq);
1237
1238 out:
1239 spin_unlock_irqrestore(&wl->wl_lock, flags);
1240 }
1241
1242 void wlcore_stop_queues(struct wl1271 *wl,
1243 enum wlcore_queue_stop_reason reason)
1244 {
1245 int i;
1246 unsigned long flags;
1247
1248 spin_lock_irqsave(&wl->wl_lock, flags);
1249
1250 /* mark all possible queues as stopped */
1251 for (i = 0; i < WLCORE_NUM_MAC_ADDRESSES * NUM_TX_QUEUES; i++)
1252 WARN_ON_ONCE(test_and_set_bit(reason,
1253 &wl->queue_stop_reasons[i]));
1254
1255 /* use the global version to make sure all vifs in mac80211 we don't
1256 * know are stopped.
1257 */
1258 ieee80211_stop_queues(wl->hw);
1259
1260 spin_unlock_irqrestore(&wl->wl_lock, flags);
1261 }
1262
1263 void wlcore_wake_queues(struct wl1271 *wl,
1264 enum wlcore_queue_stop_reason reason)
1265 {
1266 int i;
1267 unsigned long flags;
1268
1269 spin_lock_irqsave(&wl->wl_lock, flags);
1270
1271 /* mark all possible queues as awake */
1272 for (i = 0; i < WLCORE_NUM_MAC_ADDRESSES * NUM_TX_QUEUES; i++)
1273 WARN_ON_ONCE(!test_and_clear_bit(reason,
1274 &wl->queue_stop_reasons[i]));
1275
1276 /* use the global version to make sure all vifs in mac80211 we don't
1277 * know are woken up.
1278 */
1279 ieee80211_wake_queues(wl->hw);
1280
1281 spin_unlock_irqrestore(&wl->wl_lock, flags);
1282 }
1283
1284 bool wlcore_is_queue_stopped_by_reason(struct wl1271 *wl,
1285 struct wl12xx_vif *wlvif, u8 queue,
1286 enum wlcore_queue_stop_reason reason)
1287 {
1288 unsigned long flags;
1289 bool stopped;
1290
1291 spin_lock_irqsave(&wl->wl_lock, flags);
1292 stopped = wlcore_is_queue_stopped_by_reason_locked(wl, wlvif, queue,
1293 reason);
1294 spin_unlock_irqrestore(&wl->wl_lock, flags);
1295
1296 return stopped;
1297 }
1298
1299 bool wlcore_is_queue_stopped_by_reason_locked(struct wl1271 *wl,
1300 struct wl12xx_vif *wlvif, u8 queue,
1301 enum wlcore_queue_stop_reason reason)
1302 {
1303 int hwq = wlcore_tx_get_mac80211_queue(wlvif, queue);
1304
1305 assert_spin_locked(&wl->wl_lock);
1306 return test_bit(reason, &wl->queue_stop_reasons[hwq]);
1307 }
1308
1309 bool wlcore_is_queue_stopped_locked(struct wl1271 *wl, struct wl12xx_vif *wlvif,
1310 u8 queue)
1311 {
1312 int hwq = wlcore_tx_get_mac80211_queue(wlvif, queue);
1313
1314 assert_spin_locked(&wl->wl_lock);
1315 return !!wl->queue_stop_reasons[hwq];
1316 }
Linux with added FPC-III support