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