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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
[deliverable/linux.git] / drivers / net / wireless / iwlwifi / iwl-agn-tx.c
1 /******************************************************************************
2 *
3 * GPL LICENSE SUMMARY
4 *
5 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of version 2 of the GNU General Public License as
9 * published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
19 * USA
20 *
21 * The full GNU General Public License is included in this distribution
22 * in the file called LICENSE.GPL.
23 *
24 * Contact Information:
25 * Intel Linux Wireless <ilw@linux.intel.com>
26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *
28 *****************************************************************************/
29
30 #include <linux/kernel.h>
31 #include <linux/module.h>
32 #include <linux/init.h>
33 #include <linux/sched.h>
34 #include <linux/ieee80211.h>
35
36 #include "iwl-dev.h"
37 #include "iwl-core.h"
38 #include "iwl-io.h"
39 #include "iwl-agn-hw.h"
40 #include "iwl-agn.h"
41 #include "iwl-trans.h"
42
43 static void iwlagn_tx_cmd_protection(struct iwl_priv *priv,
44 struct ieee80211_tx_info *info,
45 __le16 fc, __le32 *tx_flags)
46 {
47 if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS ||
48 info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT ||
49 info->flags & IEEE80211_TX_CTL_AMPDU)
50 *tx_flags |= TX_CMD_FLG_PROT_REQUIRE_MSK;
51 }
52
53 /*
54 * handle build REPLY_TX command notification.
55 */
56 static void iwlagn_tx_cmd_build_basic(struct iwl_priv *priv,
57 struct sk_buff *skb,
58 struct iwl_tx_cmd *tx_cmd,
59 struct ieee80211_tx_info *info,
60 struct ieee80211_hdr *hdr, u8 sta_id)
61 {
62 __le16 fc = hdr->frame_control;
63 __le32 tx_flags = tx_cmd->tx_flags;
64
65 tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
66
67 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
68 tx_flags |= TX_CMD_FLG_ACK_MSK;
69 else
70 tx_flags &= ~TX_CMD_FLG_ACK_MSK;
71
72 if (ieee80211_is_probe_resp(fc))
73 tx_flags |= TX_CMD_FLG_TSF_MSK;
74 else if (ieee80211_is_back_req(fc))
75 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK;
76 else if (info->band == IEEE80211_BAND_2GHZ &&
77 cfg(priv)->bt_params &&
78 cfg(priv)->bt_params->advanced_bt_coexist &&
79 (ieee80211_is_auth(fc) || ieee80211_is_assoc_req(fc) ||
80 ieee80211_is_reassoc_req(fc) ||
81 skb->protocol == cpu_to_be16(ETH_P_PAE)))
82 tx_flags |= TX_CMD_FLG_IGNORE_BT;
83
84
85 tx_cmd->sta_id = sta_id;
86 if (ieee80211_has_morefrags(fc))
87 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
88
89 if (ieee80211_is_data_qos(fc)) {
90 u8 *qc = ieee80211_get_qos_ctl(hdr);
91 tx_cmd->tid_tspec = qc[0] & 0xf;
92 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
93 } else {
94 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
95 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
96 else
97 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
98 }
99
100 iwlagn_tx_cmd_protection(priv, info, fc, &tx_flags);
101
102 tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
103 if (ieee80211_is_mgmt(fc)) {
104 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
105 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
106 else
107 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
108 } else {
109 tx_cmd->timeout.pm_frame_timeout = 0;
110 }
111
112 tx_cmd->driver_txop = 0;
113 tx_cmd->tx_flags = tx_flags;
114 tx_cmd->next_frame_len = 0;
115 }
116
117 static void iwlagn_tx_cmd_build_rate(struct iwl_priv *priv,
118 struct iwl_tx_cmd *tx_cmd,
119 struct ieee80211_tx_info *info,
120 __le16 fc)
121 {
122 u32 rate_flags;
123 int rate_idx;
124 u8 rts_retry_limit;
125 u8 data_retry_limit;
126 u8 rate_plcp;
127
128 if (priv->shrd->wowlan) {
129 rts_retry_limit = IWLAGN_LOW_RETRY_LIMIT;
130 data_retry_limit = IWLAGN_LOW_RETRY_LIMIT;
131 } else {
132 /* Set retry limit on RTS packets */
133 rts_retry_limit = IWLAGN_RTS_DFAULT_RETRY_LIMIT;
134
135 /* Set retry limit on DATA packets and Probe Responses*/
136 if (ieee80211_is_probe_resp(fc)) {
137 data_retry_limit = IWLAGN_MGMT_DFAULT_RETRY_LIMIT;
138 rts_retry_limit =
139 min(data_retry_limit, rts_retry_limit);
140 } else if (ieee80211_is_back_req(fc))
141 data_retry_limit = IWLAGN_BAR_DFAULT_RETRY_LIMIT;
142 else
143 data_retry_limit = IWLAGN_DEFAULT_TX_RETRY;
144 }
145
146 tx_cmd->data_retry_limit = data_retry_limit;
147 tx_cmd->rts_retry_limit = rts_retry_limit;
148
149 /* DATA packets will use the uCode station table for rate/antenna
150 * selection */
151 if (ieee80211_is_data(fc)) {
152 tx_cmd->initial_rate_index = 0;
153 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
154 #ifdef CONFIG_IWLWIFI_DEVICE_TESTMODE
155 if (priv->tm_fixed_rate) {
156 /*
157 * rate overwrite by testmode
158 * we not only send lq command to change rate
159 * we also re-enforce per data pkt base.
160 */
161 tx_cmd->tx_flags &= ~TX_CMD_FLG_STA_RATE_MSK;
162 memcpy(&tx_cmd->rate_n_flags, &priv->tm_fixed_rate,
163 sizeof(tx_cmd->rate_n_flags));
164 }
165 #endif
166 return;
167 } else if (ieee80211_is_back_req(fc))
168 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
169
170 /**
171 * If the current TX rate stored in mac80211 has the MCS bit set, it's
172 * not really a TX rate. Thus, we use the lowest supported rate for
173 * this band. Also use the lowest supported rate if the stored rate
174 * index is invalid.
175 */
176 rate_idx = info->control.rates[0].idx;
177 if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS ||
178 (rate_idx < 0) || (rate_idx > IWL_RATE_COUNT_LEGACY))
179 rate_idx = rate_lowest_index(&priv->bands[info->band],
180 info->control.sta);
181 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
182 if (info->band == IEEE80211_BAND_5GHZ)
183 rate_idx += IWL_FIRST_OFDM_RATE;
184 /* Get PLCP rate for tx_cmd->rate_n_flags */
185 rate_plcp = iwl_rates[rate_idx].plcp;
186 /* Zero out flags for this packet */
187 rate_flags = 0;
188
189 /* Set CCK flag as needed */
190 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
191 rate_flags |= RATE_MCS_CCK_MSK;
192
193 /* Set up antennas */
194 if (cfg(priv)->bt_params &&
195 cfg(priv)->bt_params->advanced_bt_coexist &&
196 priv->bt_full_concurrent) {
197 /* operated as 1x1 in full concurrency mode */
198 priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
199 first_antenna(hw_params(priv).valid_tx_ant));
200 } else
201 priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
202 hw_params(priv).valid_tx_ant);
203 rate_flags |= iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
204
205 /* Set the rate in the TX cmd */
206 tx_cmd->rate_n_flags = iwl_hw_set_rate_n_flags(rate_plcp, rate_flags);
207 }
208
209 static void iwlagn_tx_cmd_build_hwcrypto(struct iwl_priv *priv,
210 struct ieee80211_tx_info *info,
211 struct iwl_tx_cmd *tx_cmd,
212 struct sk_buff *skb_frag,
213 int sta_id)
214 {
215 struct ieee80211_key_conf *keyconf = info->control.hw_key;
216
217 switch (keyconf->cipher) {
218 case WLAN_CIPHER_SUITE_CCMP:
219 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
220 memcpy(tx_cmd->key, keyconf->key, keyconf->keylen);
221 if (info->flags & IEEE80211_TX_CTL_AMPDU)
222 tx_cmd->tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
223 IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n");
224 break;
225
226 case WLAN_CIPHER_SUITE_TKIP:
227 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
228 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
229 IWL_DEBUG_TX(priv, "tx_cmd with tkip hwcrypto\n");
230 break;
231
232 case WLAN_CIPHER_SUITE_WEP104:
233 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
234 /* fall through */
235 case WLAN_CIPHER_SUITE_WEP40:
236 tx_cmd->sec_ctl |= (TX_CMD_SEC_WEP |
237 (keyconf->keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT);
238
239 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
240
241 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
242 "with key %d\n", keyconf->keyidx);
243 break;
244
245 default:
246 IWL_ERR(priv, "Unknown encode cipher %x\n", keyconf->cipher);
247 break;
248 }
249 }
250
251 /*
252 * start REPLY_TX command process
253 */
254 int iwlagn_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
255 {
256 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
257 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
258 struct iwl_station_priv *sta_priv = NULL;
259 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
260 struct iwl_device_cmd *dev_cmd = NULL;
261 struct iwl_tx_cmd *tx_cmd;
262
263 __le16 fc;
264 u8 hdr_len;
265 u16 len, seq_number = 0;
266 u8 sta_id, tid = IWL_MAX_TID_COUNT;
267 unsigned long flags;
268 bool is_agg = false;
269
270 if (info->control.vif)
271 ctx = iwl_rxon_ctx_from_vif(info->control.vif);
272
273 spin_lock_irqsave(&priv->shrd->lock, flags);
274 if (iwl_is_rfkill(priv->shrd)) {
275 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
276 goto drop_unlock_priv;
277 }
278
279 fc = hdr->frame_control;
280
281 #ifdef CONFIG_IWLWIFI_DEBUG
282 if (ieee80211_is_auth(fc))
283 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
284 else if (ieee80211_is_assoc_req(fc))
285 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
286 else if (ieee80211_is_reassoc_req(fc))
287 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
288 #endif
289
290 if (unlikely(ieee80211_is_probe_resp(fc))) {
291 struct iwl_wipan_noa_data *noa_data =
292 rcu_dereference(priv->noa_data);
293
294 if (noa_data &&
295 pskb_expand_head(skb, 0, noa_data->length,
296 GFP_ATOMIC) == 0) {
297 memcpy(skb_put(skb, noa_data->length),
298 noa_data->data, noa_data->length);
299 hdr = (struct ieee80211_hdr *)skb->data;
300 }
301 }
302
303 hdr_len = ieee80211_hdrlen(fc);
304
305 /* For management frames use broadcast id to do not break aggregation */
306 if (!ieee80211_is_data(fc))
307 sta_id = ctx->bcast_sta_id;
308 else {
309 /* Find index into station table for destination station */
310 sta_id = iwl_sta_id_or_broadcast(priv, ctx, info->control.sta);
311 if (sta_id == IWL_INVALID_STATION) {
312 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
313 hdr->addr1);
314 goto drop_unlock_priv;
315 }
316 }
317
318 IWL_DEBUG_TX(priv, "station Id %d\n", sta_id);
319
320 if (info->control.sta)
321 sta_priv = (void *)info->control.sta->drv_priv;
322
323 if (sta_priv && sta_priv->asleep &&
324 (info->flags & IEEE80211_TX_CTL_POLL_RESPONSE)) {
325 /*
326 * This sends an asynchronous command to the device,
327 * but we can rely on it being processed before the
328 * next frame is processed -- and the next frame to
329 * this station is the one that will consume this
330 * counter.
331 * For now set the counter to just 1 since we do not
332 * support uAPSD yet.
333 */
334 iwl_sta_modify_sleep_tx_count(priv, sta_id, 1);
335 }
336
337 if (info->flags & IEEE80211_TX_CTL_AMPDU)
338 is_agg = true;
339
340 /* irqs already disabled/saved above when locking priv->shrd->lock */
341 spin_lock(&priv->shrd->sta_lock);
342
343 dev_cmd = kmem_cache_alloc(priv->tx_cmd_pool, GFP_ATOMIC);
344
345 if (unlikely(!dev_cmd))
346 goto drop_unlock_sta;
347
348 memset(dev_cmd, 0, sizeof(*dev_cmd));
349 tx_cmd = (struct iwl_tx_cmd *) dev_cmd->payload;
350
351 /* Total # bytes to be transmitted */
352 len = (u16)skb->len;
353 tx_cmd->len = cpu_to_le16(len);
354
355 if (info->control.hw_key)
356 iwlagn_tx_cmd_build_hwcrypto(priv, info, tx_cmd, skb, sta_id);
357
358 /* TODO need this for burst mode later on */
359 iwlagn_tx_cmd_build_basic(priv, skb, tx_cmd, info, hdr, sta_id);
360 iwl_dbg_log_tx_data_frame(priv, len, hdr);
361
362 iwlagn_tx_cmd_build_rate(priv, tx_cmd, info, fc);
363
364 iwl_update_stats(priv, true, fc, len);
365
366 memset(&info->status, 0, sizeof(info->status));
367
368 info->driver_data[0] = ctx;
369 info->driver_data[1] = dev_cmd;
370
371 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
372 u8 *qc = NULL;
373 struct iwl_tid_data *tid_data;
374 qc = ieee80211_get_qos_ctl(hdr);
375 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
376 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
377 goto drop_unlock_sta;
378 tid_data = &priv->tid_data[sta_id][tid];
379
380 /* aggregation is on for this <sta,tid> */
381 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
382 tid_data->agg.state != IWL_AGG_ON) {
383 IWL_ERR(priv, "TX_CTL_AMPDU while not in AGG:"
384 " Tx flags = 0x%08x, agg.state = %d",
385 info->flags, tid_data->agg.state);
386 IWL_ERR(priv, "sta_id = %d, tid = %d seq_num = %d",
387 sta_id, tid, SEQ_TO_SN(tid_data->seq_number));
388 goto drop_unlock_sta;
389 }
390
391 /* We can receive packets from the stack in IWL_AGG_{ON,OFF}
392 * only. Check this here.
393 */
394 if (WARN_ONCE(tid_data->agg.state != IWL_AGG_ON &&
395 tid_data->agg.state != IWL_AGG_OFF,
396 "Tx while agg.state = %d", tid_data->agg.state))
397 goto drop_unlock_sta;
398
399 seq_number = tid_data->seq_number;
400 seq_number &= IEEE80211_SCTL_SEQ;
401 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
402 hdr->seq_ctrl |= cpu_to_le16(seq_number);
403 seq_number += 0x10;
404 }
405
406 /* Copy MAC header from skb into command buffer */
407 memcpy(tx_cmd->hdr, hdr, hdr_len);
408
409 if (iwl_trans_tx(trans(priv), skb, dev_cmd, ctx->ctxid, sta_id, tid))
410 goto drop_unlock_sta;
411
412 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc) &&
413 !ieee80211_has_morefrags(fc))
414 priv->tid_data[sta_id][tid].seq_number = seq_number;
415
416 spin_unlock(&priv->shrd->sta_lock);
417 spin_unlock_irqrestore(&priv->shrd->lock, flags);
418
419 /*
420 * Avoid atomic ops if it isn't an associated client.
421 * Also, if this is a packet for aggregation, don't
422 * increase the counter because the ucode will stop
423 * aggregation queues when their respective station
424 * goes to sleep.
425 */
426 if (sta_priv && sta_priv->client && !is_agg)
427 atomic_inc(&sta_priv->pending_frames);
428
429 return 0;
430
431 drop_unlock_sta:
432 if (dev_cmd)
433 kmem_cache_free(priv->tx_cmd_pool, dev_cmd);
434 spin_unlock(&priv->shrd->sta_lock);
435 drop_unlock_priv:
436 spin_unlock_irqrestore(&priv->shrd->lock, flags);
437 return -1;
438 }
439
440 int iwlagn_tx_agg_stop(struct iwl_priv *priv, struct ieee80211_vif *vif,
441 struct ieee80211_sta *sta, u16 tid)
442 {
443 struct iwl_tid_data *tid_data;
444 unsigned long flags;
445 int sta_id;
446
447 sta_id = iwl_sta_id(sta);
448
449 if (sta_id == IWL_INVALID_STATION) {
450 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
451 return -ENXIO;
452 }
453
454 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
455
456 tid_data = &priv->tid_data[sta_id][tid];
457
458 switch (priv->tid_data[sta_id][tid].agg.state) {
459 case IWL_EMPTYING_HW_QUEUE_ADDBA:
460 /*
461 * This can happen if the peer stops aggregation
462 * again before we've had a chance to drain the
463 * queue we selected previously, i.e. before the
464 * session was really started completely.
465 */
466 IWL_DEBUG_HT(priv, "AGG stop before setup done\n");
467 goto turn_off;
468 case IWL_AGG_ON:
469 break;
470 default:
471 IWL_WARN(priv, "Stopping AGG while state not ON "
472 "or starting for %d on %d (%d)\n", sta_id, tid,
473 priv->tid_data[sta_id][tid].agg.state);
474 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
475 return 0;
476 }
477
478 tid_data->agg.ssn = SEQ_TO_SN(tid_data->seq_number);
479
480 /* There are still packets for this RA / TID in the HW */
481 if (tid_data->agg.ssn != tid_data->next_reclaimed) {
482 IWL_DEBUG_TX_QUEUES(priv, "Can't proceed: ssn %d, "
483 "next_recl = %d",
484 tid_data->agg.ssn,
485 tid_data->next_reclaimed);
486 priv->tid_data[sta_id][tid].agg.state =
487 IWL_EMPTYING_HW_QUEUE_DELBA;
488 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
489 return 0;
490 }
491
492 IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d",
493 tid_data->agg.ssn);
494 turn_off:
495 priv->tid_data[sta_id][tid].agg.state = IWL_AGG_OFF;
496
497 /* do not restore/save irqs */
498 spin_unlock(&priv->shrd->sta_lock);
499 spin_lock(&priv->shrd->lock);
500
501 iwl_trans_tx_agg_disable(trans(priv), sta_id, tid);
502
503 spin_unlock_irqrestore(&priv->shrd->lock, flags);
504
505 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
506
507 return 0;
508 }
509
510 int iwlagn_tx_agg_start(struct iwl_priv *priv, struct ieee80211_vif *vif,
511 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
512 {
513 struct iwl_tid_data *tid_data;
514 unsigned long flags;
515 int sta_id;
516 int ret;
517
518 IWL_DEBUG_HT(priv, "TX AGG request on ra = %pM tid = %d\n",
519 sta->addr, tid);
520
521 sta_id = iwl_sta_id(sta);
522 if (sta_id == IWL_INVALID_STATION) {
523 IWL_ERR(priv, "Start AGG on invalid station\n");
524 return -ENXIO;
525 }
526 if (unlikely(tid >= IWL_MAX_TID_COUNT))
527 return -EINVAL;
528
529 if (priv->tid_data[sta_id][tid].agg.state != IWL_AGG_OFF) {
530 IWL_ERR(priv, "Start AGG when state is not IWL_AGG_OFF !\n");
531 return -ENXIO;
532 }
533
534 ret = iwl_sta_tx_modify_enable_tid(priv, sta_id, tid);
535 if (ret)
536 return ret;
537
538 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
539
540 tid_data = &priv->tid_data[sta_id][tid];
541 tid_data->agg.ssn = SEQ_TO_SN(tid_data->seq_number);
542
543 *ssn = tid_data->agg.ssn;
544
545 ret = iwl_trans_tx_agg_alloc(trans(priv), sta_id, tid);
546 if (ret) {
547 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
548 return ret;
549 }
550
551 if (*ssn == tid_data->next_reclaimed) {
552 IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d",
553 tid_data->agg.ssn);
554 tid_data->agg.state = IWL_AGG_ON;
555 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
556 } else {
557 IWL_DEBUG_TX_QUEUES(priv, "Can't proceed: ssn %d, "
558 "next_reclaimed = %d",
559 tid_data->agg.ssn,
560 tid_data->next_reclaimed);
561 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA;
562 }
563
564 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
565
566 return ret;
567 }
568
569 int iwlagn_tx_agg_oper(struct iwl_priv *priv, struct ieee80211_vif *vif,
570 struct ieee80211_sta *sta, u16 tid, u8 buf_size)
571 {
572 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
573 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
574 unsigned long flags;
575 u16 ssn;
576
577 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
578
579 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
580 ssn = priv->tid_data[sta_priv->sta_id][tid].agg.ssn;
581 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
582
583 iwl_trans_tx_agg_setup(trans(priv), ctx->ctxid, sta_priv->sta_id, tid,
584 buf_size, ssn);
585
586 /*
587 * If the limit is 0, then it wasn't initialised yet,
588 * use the default. We can do that since we take the
589 * minimum below, and we don't want to go above our
590 * default due to hardware restrictions.
591 */
592 if (sta_priv->max_agg_bufsize == 0)
593 sta_priv->max_agg_bufsize =
594 LINK_QUAL_AGG_FRAME_LIMIT_DEF;
595
596 /*
597 * Even though in theory the peer could have different
598 * aggregation reorder buffer sizes for different sessions,
599 * our ucode doesn't allow for that and has a global limit
600 * for each station. Therefore, use the minimum of all the
601 * aggregation sessions and our default value.
602 */
603 sta_priv->max_agg_bufsize =
604 min(sta_priv->max_agg_bufsize, buf_size);
605
606 if (cfg(priv)->ht_params &&
607 cfg(priv)->ht_params->use_rts_for_aggregation) {
608 /*
609 * switch to RTS/CTS if it is the prefer protection
610 * method for HT traffic
611 */
612
613 sta_priv->lq_sta.lq.general_params.flags |=
614 LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
615 }
616 priv->agg_tids_count++;
617 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
618 priv->agg_tids_count);
619
620 sta_priv->lq_sta.lq.agg_params.agg_frame_cnt_limit =
621 sta_priv->max_agg_bufsize;
622
623 IWL_INFO(priv, "Tx aggregation enabled on ra = %pM tid = %d\n",
624 sta->addr, tid);
625
626 return iwl_send_lq_cmd(priv, ctx,
627 &sta_priv->lq_sta.lq, CMD_ASYNC, false);
628 }
629
630 static void iwlagn_check_ratid_empty(struct iwl_priv *priv, int sta_id, u8 tid)
631 {
632 struct iwl_tid_data *tid_data = &priv->tid_data[sta_id][tid];
633 enum iwl_rxon_context_id ctx;
634 struct ieee80211_vif *vif;
635 u8 *addr;
636
637 lockdep_assert_held(&priv->shrd->sta_lock);
638
639 addr = priv->stations[sta_id].sta.sta.addr;
640 ctx = priv->stations[sta_id].ctxid;
641 vif = priv->contexts[ctx].vif;
642
643 switch (priv->tid_data[sta_id][tid].agg.state) {
644 case IWL_EMPTYING_HW_QUEUE_DELBA:
645 /* There are no packets for this RA / TID in the HW any more */
646 if (tid_data->agg.ssn == tid_data->next_reclaimed) {
647 IWL_DEBUG_TX_QUEUES(priv,
648 "Can continue DELBA flow ssn = next_recl ="
649 " %d", tid_data->next_reclaimed);
650 iwl_trans_tx_agg_disable(trans(priv), sta_id, tid);
651 tid_data->agg.state = IWL_AGG_OFF;
652 ieee80211_stop_tx_ba_cb_irqsafe(vif, addr, tid);
653 }
654 break;
655 case IWL_EMPTYING_HW_QUEUE_ADDBA:
656 /* There are no packets for this RA / TID in the HW any more */
657 if (tid_data->agg.ssn == tid_data->next_reclaimed) {
658 IWL_DEBUG_TX_QUEUES(priv,
659 "Can continue ADDBA flow ssn = next_recl ="
660 " %d", tid_data->next_reclaimed);
661 tid_data->agg.state = IWL_AGG_ON;
662 ieee80211_start_tx_ba_cb_irqsafe(vif, addr, tid);
663 }
664 break;
665 default:
666 break;
667 }
668 }
669
670 static void iwlagn_non_agg_tx_status(struct iwl_priv *priv,
671 struct iwl_rxon_context *ctx,
672 const u8 *addr1)
673 {
674 struct ieee80211_sta *sta;
675 struct iwl_station_priv *sta_priv;
676
677 rcu_read_lock();
678 sta = ieee80211_find_sta(ctx->vif, addr1);
679 if (sta) {
680 sta_priv = (void *)sta->drv_priv;
681 /* avoid atomic ops if this isn't a client */
682 if (sta_priv->client &&
683 atomic_dec_return(&sta_priv->pending_frames) == 0)
684 ieee80211_sta_block_awake(priv->hw, sta, false);
685 }
686 rcu_read_unlock();
687 }
688
689 /**
690 * translate ucode response to mac80211 tx status control values
691 */
692 static void iwlagn_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
693 struct ieee80211_tx_info *info)
694 {
695 struct ieee80211_tx_rate *r = &info->control.rates[0];
696
697 info->antenna_sel_tx =
698 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
699 if (rate_n_flags & RATE_MCS_HT_MSK)
700 r->flags |= IEEE80211_TX_RC_MCS;
701 if (rate_n_flags & RATE_MCS_GF_MSK)
702 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
703 if (rate_n_flags & RATE_MCS_HT40_MSK)
704 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
705 if (rate_n_flags & RATE_MCS_DUP_MSK)
706 r->flags |= IEEE80211_TX_RC_DUP_DATA;
707 if (rate_n_flags & RATE_MCS_SGI_MSK)
708 r->flags |= IEEE80211_TX_RC_SHORT_GI;
709 r->idx = iwlagn_hwrate_to_mac80211_idx(rate_n_flags, info->band);
710 }
711
712 #ifdef CONFIG_IWLWIFI_DEBUG
713 const char *iwl_get_tx_fail_reason(u32 status)
714 {
715 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
716 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
717
718 switch (status & TX_STATUS_MSK) {
719 case TX_STATUS_SUCCESS:
720 return "SUCCESS";
721 TX_STATUS_POSTPONE(DELAY);
722 TX_STATUS_POSTPONE(FEW_BYTES);
723 TX_STATUS_POSTPONE(BT_PRIO);
724 TX_STATUS_POSTPONE(QUIET_PERIOD);
725 TX_STATUS_POSTPONE(CALC_TTAK);
726 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
727 TX_STATUS_FAIL(SHORT_LIMIT);
728 TX_STATUS_FAIL(LONG_LIMIT);
729 TX_STATUS_FAIL(FIFO_UNDERRUN);
730 TX_STATUS_FAIL(DRAIN_FLOW);
731 TX_STATUS_FAIL(RFKILL_FLUSH);
732 TX_STATUS_FAIL(LIFE_EXPIRE);
733 TX_STATUS_FAIL(DEST_PS);
734 TX_STATUS_FAIL(HOST_ABORTED);
735 TX_STATUS_FAIL(BT_RETRY);
736 TX_STATUS_FAIL(STA_INVALID);
737 TX_STATUS_FAIL(FRAG_DROPPED);
738 TX_STATUS_FAIL(TID_DISABLE);
739 TX_STATUS_FAIL(FIFO_FLUSHED);
740 TX_STATUS_FAIL(INSUFFICIENT_CF_POLL);
741 TX_STATUS_FAIL(PASSIVE_NO_RX);
742 TX_STATUS_FAIL(NO_BEACON_ON_RADAR);
743 }
744
745 return "UNKNOWN";
746
747 #undef TX_STATUS_FAIL
748 #undef TX_STATUS_POSTPONE
749 }
750 #endif /* CONFIG_IWLWIFI_DEBUG */
751
752 static void iwlagn_count_agg_tx_err_status(struct iwl_priv *priv, u16 status)
753 {
754 status &= AGG_TX_STATUS_MSK;
755
756 switch (status) {
757 case AGG_TX_STATE_UNDERRUN_MSK:
758 priv->reply_agg_tx_stats.underrun++;
759 break;
760 case AGG_TX_STATE_BT_PRIO_MSK:
761 priv->reply_agg_tx_stats.bt_prio++;
762 break;
763 case AGG_TX_STATE_FEW_BYTES_MSK:
764 priv->reply_agg_tx_stats.few_bytes++;
765 break;
766 case AGG_TX_STATE_ABORT_MSK:
767 priv->reply_agg_tx_stats.abort++;
768 break;
769 case AGG_TX_STATE_LAST_SENT_TTL_MSK:
770 priv->reply_agg_tx_stats.last_sent_ttl++;
771 break;
772 case AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK:
773 priv->reply_agg_tx_stats.last_sent_try++;
774 break;
775 case AGG_TX_STATE_LAST_SENT_BT_KILL_MSK:
776 priv->reply_agg_tx_stats.last_sent_bt_kill++;
777 break;
778 case AGG_TX_STATE_SCD_QUERY_MSK:
779 priv->reply_agg_tx_stats.scd_query++;
780 break;
781 case AGG_TX_STATE_TEST_BAD_CRC32_MSK:
782 priv->reply_agg_tx_stats.bad_crc32++;
783 break;
784 case AGG_TX_STATE_RESPONSE_MSK:
785 priv->reply_agg_tx_stats.response++;
786 break;
787 case AGG_TX_STATE_DUMP_TX_MSK:
788 priv->reply_agg_tx_stats.dump_tx++;
789 break;
790 case AGG_TX_STATE_DELAY_TX_MSK:
791 priv->reply_agg_tx_stats.delay_tx++;
792 break;
793 default:
794 priv->reply_agg_tx_stats.unknown++;
795 break;
796 }
797 }
798
799 static void iwl_rx_reply_tx_agg(struct iwl_priv *priv,
800 struct iwlagn_tx_resp *tx_resp)
801 {
802 struct agg_tx_status *frame_status = &tx_resp->status;
803 int tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
804 IWLAGN_TX_RES_TID_POS;
805 int sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
806 IWLAGN_TX_RES_RA_POS;
807 struct iwl_ht_agg *agg = &priv->tid_data[sta_id][tid].agg;
808 u32 status = le16_to_cpu(tx_resp->status.status);
809 int i;
810
811 if (agg->wait_for_ba)
812 IWL_DEBUG_TX_REPLY(priv,
813 "got tx response w/o block-ack\n");
814
815 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
816 agg->wait_for_ba = (tx_resp->frame_count > 1);
817
818 /*
819 * If the BT kill count is non-zero, we'll get this
820 * notification again.
821 */
822 if (tx_resp->bt_kill_count && tx_resp->frame_count == 1 &&
823 cfg(priv)->bt_params &&
824 cfg(priv)->bt_params->advanced_bt_coexist) {
825 IWL_DEBUG_COEX(priv, "receive reply tx w/ bt_kill\n");
826 }
827
828 if (tx_resp->frame_count == 1)
829 return;
830
831 /* Construct bit-map of pending frames within Tx window */
832 for (i = 0; i < tx_resp->frame_count; i++) {
833 u16 fstatus = le16_to_cpu(frame_status[i].status);
834
835 if (status & AGG_TX_STATUS_MSK)
836 iwlagn_count_agg_tx_err_status(priv, fstatus);
837
838 if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
839 AGG_TX_STATE_ABORT_MSK))
840 continue;
841
842 IWL_DEBUG_TX_REPLY(priv, "status %s (0x%08x), "
843 "try-count (0x%08x)\n",
844 iwl_get_agg_tx_fail_reason(fstatus),
845 fstatus & AGG_TX_STATUS_MSK,
846 fstatus & AGG_TX_TRY_MSK);
847 }
848 }
849
850 #ifdef CONFIG_IWLWIFI_DEBUG
851 #define AGG_TX_STATE_FAIL(x) case AGG_TX_STATE_ ## x: return #x
852
853 const char *iwl_get_agg_tx_fail_reason(u16 status)
854 {
855 status &= AGG_TX_STATUS_MSK;
856 switch (status) {
857 case AGG_TX_STATE_TRANSMITTED:
858 return "SUCCESS";
859 AGG_TX_STATE_FAIL(UNDERRUN_MSK);
860 AGG_TX_STATE_FAIL(BT_PRIO_MSK);
861 AGG_TX_STATE_FAIL(FEW_BYTES_MSK);
862 AGG_TX_STATE_FAIL(ABORT_MSK);
863 AGG_TX_STATE_FAIL(LAST_SENT_TTL_MSK);
864 AGG_TX_STATE_FAIL(LAST_SENT_TRY_CNT_MSK);
865 AGG_TX_STATE_FAIL(LAST_SENT_BT_KILL_MSK);
866 AGG_TX_STATE_FAIL(SCD_QUERY_MSK);
867 AGG_TX_STATE_FAIL(TEST_BAD_CRC32_MSK);
868 AGG_TX_STATE_FAIL(RESPONSE_MSK);
869 AGG_TX_STATE_FAIL(DUMP_TX_MSK);
870 AGG_TX_STATE_FAIL(DELAY_TX_MSK);
871 }
872
873 return "UNKNOWN";
874 }
875 #endif /* CONFIG_IWLWIFI_DEBUG */
876
877 static inline u32 iwlagn_get_scd_ssn(struct iwlagn_tx_resp *tx_resp)
878 {
879 return le32_to_cpup((__le32 *)&tx_resp->status +
880 tx_resp->frame_count) & MAX_SN;
881 }
882
883 static void iwlagn_count_tx_err_status(struct iwl_priv *priv, u16 status)
884 {
885 status &= TX_STATUS_MSK;
886
887 switch (status) {
888 case TX_STATUS_POSTPONE_DELAY:
889 priv->reply_tx_stats.pp_delay++;
890 break;
891 case TX_STATUS_POSTPONE_FEW_BYTES:
892 priv->reply_tx_stats.pp_few_bytes++;
893 break;
894 case TX_STATUS_POSTPONE_BT_PRIO:
895 priv->reply_tx_stats.pp_bt_prio++;
896 break;
897 case TX_STATUS_POSTPONE_QUIET_PERIOD:
898 priv->reply_tx_stats.pp_quiet_period++;
899 break;
900 case TX_STATUS_POSTPONE_CALC_TTAK:
901 priv->reply_tx_stats.pp_calc_ttak++;
902 break;
903 case TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY:
904 priv->reply_tx_stats.int_crossed_retry++;
905 break;
906 case TX_STATUS_FAIL_SHORT_LIMIT:
907 priv->reply_tx_stats.short_limit++;
908 break;
909 case TX_STATUS_FAIL_LONG_LIMIT:
910 priv->reply_tx_stats.long_limit++;
911 break;
912 case TX_STATUS_FAIL_FIFO_UNDERRUN:
913 priv->reply_tx_stats.fifo_underrun++;
914 break;
915 case TX_STATUS_FAIL_DRAIN_FLOW:
916 priv->reply_tx_stats.drain_flow++;
917 break;
918 case TX_STATUS_FAIL_RFKILL_FLUSH:
919 priv->reply_tx_stats.rfkill_flush++;
920 break;
921 case TX_STATUS_FAIL_LIFE_EXPIRE:
922 priv->reply_tx_stats.life_expire++;
923 break;
924 case TX_STATUS_FAIL_DEST_PS:
925 priv->reply_tx_stats.dest_ps++;
926 break;
927 case TX_STATUS_FAIL_HOST_ABORTED:
928 priv->reply_tx_stats.host_abort++;
929 break;
930 case TX_STATUS_FAIL_BT_RETRY:
931 priv->reply_tx_stats.bt_retry++;
932 break;
933 case TX_STATUS_FAIL_STA_INVALID:
934 priv->reply_tx_stats.sta_invalid++;
935 break;
936 case TX_STATUS_FAIL_FRAG_DROPPED:
937 priv->reply_tx_stats.frag_drop++;
938 break;
939 case TX_STATUS_FAIL_TID_DISABLE:
940 priv->reply_tx_stats.tid_disable++;
941 break;
942 case TX_STATUS_FAIL_FIFO_FLUSHED:
943 priv->reply_tx_stats.fifo_flush++;
944 break;
945 case TX_STATUS_FAIL_INSUFFICIENT_CF_POLL:
946 priv->reply_tx_stats.insuff_cf_poll++;
947 break;
948 case TX_STATUS_FAIL_PASSIVE_NO_RX:
949 priv->reply_tx_stats.fail_hw_drop++;
950 break;
951 case TX_STATUS_FAIL_NO_BEACON_ON_RADAR:
952 priv->reply_tx_stats.sta_color_mismatch++;
953 break;
954 default:
955 priv->reply_tx_stats.unknown++;
956 break;
957 }
958 }
959
960 static void iwlagn_set_tx_status(struct iwl_priv *priv,
961 struct ieee80211_tx_info *info,
962 struct iwlagn_tx_resp *tx_resp,
963 bool is_agg)
964 {
965 u16 status = le16_to_cpu(tx_resp->status.status);
966
967 info->status.rates[0].count = tx_resp->failure_frame + 1;
968 if (is_agg)
969 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
970 info->flags |= iwl_tx_status_to_mac80211(status);
971 iwlagn_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
972 info);
973 if (!iwl_is_tx_success(status))
974 iwlagn_count_tx_err_status(priv, status);
975 }
976
977 static void iwl_check_abort_status(struct iwl_priv *priv,
978 u8 frame_count, u32 status)
979 {
980 if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) {
981 IWL_ERR(priv, "Tx flush command to flush out all frames\n");
982 if (!test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
983 queue_work(priv->shrd->workqueue, &priv->tx_flush);
984 }
985 }
986
987 int iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb,
988 struct iwl_device_cmd *cmd)
989 {
990 struct iwl_rx_packet *pkt = rxb_addr(rxb);
991 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
992 int txq_id = SEQ_TO_QUEUE(sequence);
993 int cmd_index __maybe_unused = SEQ_TO_INDEX(sequence);
994 struct iwlagn_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
995 struct ieee80211_hdr *hdr;
996 u32 status = le16_to_cpu(tx_resp->status.status);
997 u16 ssn = iwlagn_get_scd_ssn(tx_resp);
998 int tid;
999 int sta_id;
1000 int freed;
1001 struct ieee80211_tx_info *info;
1002 unsigned long flags;
1003 struct sk_buff_head skbs;
1004 struct sk_buff *skb;
1005 struct iwl_rxon_context *ctx;
1006 bool is_agg = (txq_id >= IWLAGN_FIRST_AMPDU_QUEUE);
1007
1008 tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
1009 IWLAGN_TX_RES_TID_POS;
1010 sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
1011 IWLAGN_TX_RES_RA_POS;
1012
1013 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1014
1015 if (is_agg)
1016 iwl_rx_reply_tx_agg(priv, tx_resp);
1017
1018 if (tx_resp->frame_count == 1) {
1019 u16 next_reclaimed = le16_to_cpu(tx_resp->seq_ctl);
1020 next_reclaimed = SEQ_TO_SN(next_reclaimed + 0x10);
1021
1022 if (is_agg) {
1023 /* If this is an aggregation queue, we can rely on the
1024 * ssn since the wifi sequence number corresponds to
1025 * the index in the TFD ring (%256).
1026 * The seq_ctl is the sequence control of the packet
1027 * to which this Tx response relates. But if there is a
1028 * hole in the bitmap of the BA we received, this Tx
1029 * response may allow to reclaim the hole and all the
1030 * subsequent packets that were already acked.
1031 * In that case, seq_ctl != ssn, and the next packet
1032 * to be reclaimed will be ssn and not seq_ctl.
1033 */
1034 next_reclaimed = ssn;
1035 }
1036
1037 __skb_queue_head_init(&skbs);
1038 priv->tid_data[sta_id][tid].next_reclaimed = next_reclaimed;
1039
1040 IWL_DEBUG_TX_REPLY(priv, "Next reclaimed packet:%d",
1041 next_reclaimed);
1042
1043 /*we can free until ssn % q.n_bd not inclusive */
1044 WARN_ON(iwl_trans_reclaim(trans(priv), sta_id, tid, txq_id,
1045 ssn, status, &skbs));
1046 iwlagn_check_ratid_empty(priv, sta_id, tid);
1047 freed = 0;
1048 while (!skb_queue_empty(&skbs)) {
1049 skb = __skb_dequeue(&skbs);
1050 hdr = (struct ieee80211_hdr *)skb->data;
1051
1052 if (!ieee80211_is_data_qos(hdr->frame_control))
1053 priv->last_seq_ctl = tx_resp->seq_ctl;
1054
1055 info = IEEE80211_SKB_CB(skb);
1056 ctx = info->driver_data[0];
1057 kmem_cache_free(priv->tx_cmd_pool,
1058 (info->driver_data[1]));
1059
1060 memset(&info->status, 0, sizeof(info->status));
1061
1062 if (status == TX_STATUS_FAIL_PASSIVE_NO_RX &&
1063 iwl_is_associated_ctx(ctx) && ctx->vif &&
1064 ctx->vif->type == NL80211_IFTYPE_STATION) {
1065 ctx->last_tx_rejected = true;
1066 iwl_trans_stop_queue(trans(priv), txq_id,
1067 "Tx on passive channel");
1068
1069 IWL_DEBUG_TX_REPLY(priv,
1070 "TXQ %d status %s (0x%08x) "
1071 "rate_n_flags 0x%x retries %d\n",
1072 txq_id,
1073 iwl_get_tx_fail_reason(status),
1074 status,
1075 le32_to_cpu(tx_resp->rate_n_flags),
1076 tx_resp->failure_frame);
1077
1078 IWL_DEBUG_TX_REPLY(priv,
1079 "FrameCnt = %d, idx=%d\n",
1080 tx_resp->frame_count, cmd_index);
1081 }
1082
1083 /* check if BAR is needed */
1084 if (is_agg && !iwl_is_tx_success(status))
1085 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1086 iwlagn_set_tx_status(priv, IEEE80211_SKB_CB(skb),
1087 tx_resp, is_agg);
1088 if (!is_agg)
1089 iwlagn_non_agg_tx_status(priv, ctx, hdr->addr1);
1090
1091 ieee80211_tx_status_irqsafe(priv->hw, skb);
1092
1093 freed++;
1094 }
1095
1096 WARN_ON(!is_agg && freed != 1);
1097 }
1098
1099 iwl_check_abort_status(priv, tx_resp->frame_count, status);
1100 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1101 return 0;
1102 }
1103
1104 /**
1105 * iwlagn_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
1106 *
1107 * Handles block-acknowledge notification from device, which reports success
1108 * of frames sent via aggregation.
1109 */
1110 int iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv,
1111 struct iwl_rx_mem_buffer *rxb,
1112 struct iwl_device_cmd *cmd)
1113 {
1114 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1115 struct iwl_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba;
1116 struct iwl_ht_agg *agg;
1117 struct sk_buff_head reclaimed_skbs;
1118 struct ieee80211_tx_info *info;
1119 struct ieee80211_hdr *hdr;
1120 struct sk_buff *skb;
1121 unsigned long flags;
1122 int sta_id;
1123 int tid;
1124 int freed;
1125
1126 /* "flow" corresponds to Tx queue */
1127 u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
1128
1129 /* "ssn" is start of block-ack Tx window, corresponds to index
1130 * (in Tx queue's circular buffer) of first TFD/frame in window */
1131 u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
1132
1133 if (scd_flow >= hw_params(priv).max_txq_num) {
1134 IWL_ERR(priv,
1135 "BUG_ON scd_flow is bigger than number of queues\n");
1136 return 0;
1137 }
1138
1139 sta_id = ba_resp->sta_id;
1140 tid = ba_resp->tid;
1141 agg = &priv->tid_data[sta_id][tid].agg;
1142
1143 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1144
1145 if (unlikely(!agg->wait_for_ba)) {
1146 if (unlikely(ba_resp->bitmap))
1147 IWL_ERR(priv, "Received BA when not expected\n");
1148 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1149 return 0;
1150 }
1151
1152 __skb_queue_head_init(&reclaimed_skbs);
1153
1154 /* Release all TFDs before the SSN, i.e. all TFDs in front of
1155 * block-ack window (we assume that they've been successfully
1156 * transmitted ... if not, it's too late anyway). */
1157 if (iwl_trans_reclaim(trans(priv), sta_id, tid, scd_flow,
1158 ba_resp_scd_ssn, 0, &reclaimed_skbs)) {
1159 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1160 return 0;
1161 }
1162
1163 IWL_DEBUG_TX_REPLY(priv, "REPLY_COMPRESSED_BA [%d] Received from %pM, "
1164 "sta_id = %d\n",
1165 agg->wait_for_ba,
1166 (u8 *) &ba_resp->sta_addr_lo32,
1167 ba_resp->sta_id);
1168 IWL_DEBUG_TX_REPLY(priv, "TID = %d, SeqCtl = %d, bitmap = 0x%llx, "
1169 "scd_flow = %d, scd_ssn = %d\n",
1170 ba_resp->tid, le16_to_cpu(ba_resp->seq_ctl),
1171 (unsigned long long)le64_to_cpu(ba_resp->bitmap),
1172 scd_flow, ba_resp_scd_ssn);
1173
1174 /* Mark that the expected block-ack response arrived */
1175 agg->wait_for_ba = false;
1176
1177 /* Sanity check values reported by uCode */
1178 if (ba_resp->txed_2_done > ba_resp->txed) {
1179 IWL_DEBUG_TX_REPLY(priv,
1180 "bogus sent(%d) and ack(%d) count\n",
1181 ba_resp->txed, ba_resp->txed_2_done);
1182 /*
1183 * set txed_2_done = txed,
1184 * so it won't impact rate scale
1185 */
1186 ba_resp->txed = ba_resp->txed_2_done;
1187 }
1188 IWL_DEBUG_HT(priv, "agg frames sent:%d, acked:%d\n",
1189 ba_resp->txed, ba_resp->txed_2_done);
1190
1191 priv->tid_data[sta_id][tid].next_reclaimed = ba_resp_scd_ssn;
1192
1193 iwlagn_check_ratid_empty(priv, sta_id, tid);
1194 freed = 0;
1195 while (!skb_queue_empty(&reclaimed_skbs)) {
1196
1197 skb = __skb_dequeue(&reclaimed_skbs);
1198 hdr = (struct ieee80211_hdr *)skb->data;
1199
1200 if (ieee80211_is_data_qos(hdr->frame_control))
1201 freed++;
1202 else
1203 WARN_ON_ONCE(1);
1204
1205 info = IEEE80211_SKB_CB(skb);
1206 kmem_cache_free(priv->tx_cmd_pool, (info->driver_data[1]));
1207
1208 if (freed == 1) {
1209 /* this is the first skb we deliver in this batch */
1210 /* put the rate scaling data there */
1211 info = IEEE80211_SKB_CB(skb);
1212 memset(&info->status, 0, sizeof(info->status));
1213 info->flags |= IEEE80211_TX_STAT_ACK;
1214 info->flags |= IEEE80211_TX_STAT_AMPDU;
1215 info->status.ampdu_ack_len = ba_resp->txed_2_done;
1216 info->status.ampdu_len = ba_resp->txed;
1217 iwlagn_hwrate_to_tx_control(priv, agg->rate_n_flags,
1218 info);
1219 }
1220
1221 ieee80211_tx_status_irqsafe(priv->hw, skb);
1222 }
1223
1224 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1225 return 0;
1226 }
Linux kernel - Deliverables
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