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Merge remote branch 'wireless-next/master' into ath6kl-next
[deliverable/linux.git] / drivers / net / wireless / iwlwifi / iwl-agn-tx.c
1 /******************************************************************************
2 *
3 * GPL LICENSE SUMMARY
4 *
5 * Copyright(c) 2008 - 2012 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 tx_cmd->tid_tspec = IWL_TID_NON_QOS;
95 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
96 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
97 else
98 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
99 }
100
101 iwlagn_tx_cmd_protection(priv, info, fc, &tx_flags);
102
103 tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
104 if (ieee80211_is_mgmt(fc)) {
105 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
106 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
107 else
108 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
109 } else {
110 tx_cmd->timeout.pm_frame_timeout = 0;
111 }
112
113 tx_cmd->driver_txop = 0;
114 tx_cmd->tx_flags = tx_flags;
115 tx_cmd->next_frame_len = 0;
116 }
117
118 static void iwlagn_tx_cmd_build_rate(struct iwl_priv *priv,
119 struct iwl_tx_cmd *tx_cmd,
120 struct ieee80211_tx_info *info,
121 __le16 fc)
122 {
123 u32 rate_flags;
124 int rate_idx;
125 u8 rts_retry_limit;
126 u8 data_retry_limit;
127 u8 rate_plcp;
128
129 if (priv->shrd->wowlan) {
130 rts_retry_limit = IWLAGN_LOW_RETRY_LIMIT;
131 data_retry_limit = IWLAGN_LOW_RETRY_LIMIT;
132 } else {
133 /* Set retry limit on RTS packets */
134 rts_retry_limit = IWLAGN_RTS_DFAULT_RETRY_LIMIT;
135
136 /* Set retry limit on DATA packets and Probe Responses*/
137 if (ieee80211_is_probe_resp(fc)) {
138 data_retry_limit = IWLAGN_MGMT_DFAULT_RETRY_LIMIT;
139 rts_retry_limit =
140 min(data_retry_limit, rts_retry_limit);
141 } else if (ieee80211_is_back_req(fc))
142 data_retry_limit = IWLAGN_BAR_DFAULT_RETRY_LIMIT;
143 else
144 data_retry_limit = IWLAGN_DEFAULT_TX_RETRY;
145 }
146
147 tx_cmd->data_retry_limit = data_retry_limit;
148 tx_cmd->rts_retry_limit = rts_retry_limit;
149
150 /* DATA packets will use the uCode station table for rate/antenna
151 * selection */
152 if (ieee80211_is_data(fc)) {
153 tx_cmd->initial_rate_index = 0;
154 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
155 #ifdef CONFIG_IWLWIFI_DEVICE_TESTMODE
156 if (priv->tm_fixed_rate) {
157 /*
158 * rate overwrite by testmode
159 * we not only send lq command to change rate
160 * we also re-enforce per data pkt base.
161 */
162 tx_cmd->tx_flags &= ~TX_CMD_FLG_STA_RATE_MSK;
163 memcpy(&tx_cmd->rate_n_flags, &priv->tm_fixed_rate,
164 sizeof(tx_cmd->rate_n_flags));
165 }
166 #endif
167 return;
168 } else if (ieee80211_is_back_req(fc))
169 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
170
171 /**
172 * If the current TX rate stored in mac80211 has the MCS bit set, it's
173 * not really a TX rate. Thus, we use the lowest supported rate for
174 * this band. Also use the lowest supported rate if the stored rate
175 * index is invalid.
176 */
177 rate_idx = info->control.rates[0].idx;
178 if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS ||
179 (rate_idx < 0) || (rate_idx > IWL_RATE_COUNT_LEGACY))
180 rate_idx = rate_lowest_index(&priv->bands[info->band],
181 info->control.sta);
182 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
183 if (info->band == IEEE80211_BAND_5GHZ)
184 rate_idx += IWL_FIRST_OFDM_RATE;
185 /* Get PLCP rate for tx_cmd->rate_n_flags */
186 rate_plcp = iwl_rates[rate_idx].plcp;
187 /* Zero out flags for this packet */
188 rate_flags = 0;
189
190 /* Set CCK flag as needed */
191 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
192 rate_flags |= RATE_MCS_CCK_MSK;
193
194 /* Set up antennas */
195 if (cfg(priv)->bt_params &&
196 cfg(priv)->bt_params->advanced_bt_coexist &&
197 priv->bt_full_concurrent) {
198 /* operated as 1x1 in full concurrency mode */
199 priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
200 first_antenna(hw_params(priv).valid_tx_ant));
201 } else
202 priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
203 hw_params(priv).valid_tx_ant);
204 rate_flags |= iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
205
206 /* Set the rate in the TX cmd */
207 tx_cmd->rate_n_flags = iwl_hw_set_rate_n_flags(rate_plcp, rate_flags);
208 }
209
210 static void iwlagn_tx_cmd_build_hwcrypto(struct iwl_priv *priv,
211 struct ieee80211_tx_info *info,
212 struct iwl_tx_cmd *tx_cmd,
213 struct sk_buff *skb_frag,
214 int sta_id)
215 {
216 struct ieee80211_key_conf *keyconf = info->control.hw_key;
217
218 switch (keyconf->cipher) {
219 case WLAN_CIPHER_SUITE_CCMP:
220 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
221 memcpy(tx_cmd->key, keyconf->key, keyconf->keylen);
222 if (info->flags & IEEE80211_TX_CTL_AMPDU)
223 tx_cmd->tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
224 IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n");
225 break;
226
227 case WLAN_CIPHER_SUITE_TKIP:
228 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
229 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
230 IWL_DEBUG_TX(priv, "tx_cmd with tkip hwcrypto\n");
231 break;
232
233 case WLAN_CIPHER_SUITE_WEP104:
234 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
235 /* fall through */
236 case WLAN_CIPHER_SUITE_WEP40:
237 tx_cmd->sec_ctl |= (TX_CMD_SEC_WEP |
238 (keyconf->keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT);
239
240 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
241
242 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
243 "with key %d\n", keyconf->keyidx);
244 break;
245
246 default:
247 IWL_ERR(priv, "Unknown encode cipher %x\n", keyconf->cipher);
248 break;
249 }
250 }
251
252 /*
253 * start REPLY_TX command process
254 */
255 int iwlagn_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
256 {
257 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
258 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
259 struct iwl_station_priv *sta_priv = NULL;
260 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
261 struct iwl_device_cmd *dev_cmd = NULL;
262 struct iwl_tx_cmd *tx_cmd;
263
264 __le16 fc;
265 u8 hdr_len;
266 u16 len, seq_number = 0;
267 u8 sta_id, tid = IWL_MAX_TID_COUNT;
268 unsigned long flags;
269 bool is_agg = false;
270
271 if (info->control.vif)
272 ctx = iwl_rxon_ctx_from_vif(info->control.vif);
273
274 spin_lock_irqsave(&priv->shrd->lock, flags);
275 if (iwl_is_rfkill(priv->shrd)) {
276 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
277 goto drop_unlock_priv;
278 }
279
280 fc = hdr->frame_control;
281
282 #ifdef CONFIG_IWLWIFI_DEBUG
283 if (ieee80211_is_auth(fc))
284 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
285 else if (ieee80211_is_assoc_req(fc))
286 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
287 else if (ieee80211_is_reassoc_req(fc))
288 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
289 #endif
290
291 if (unlikely(ieee80211_is_probe_resp(fc))) {
292 struct iwl_wipan_noa_data *noa_data =
293 rcu_dereference(priv->noa_data);
294
295 if (noa_data &&
296 pskb_expand_head(skb, 0, noa_data->length,
297 GFP_ATOMIC) == 0) {
298 memcpy(skb_put(skb, noa_data->length),
299 noa_data->data, noa_data->length);
300 hdr = (struct ieee80211_hdr *)skb->data;
301 }
302 }
303
304 hdr_len = ieee80211_hdrlen(fc);
305
306 /* For management frames use broadcast id to do not break aggregation */
307 if (!ieee80211_is_data(fc))
308 sta_id = ctx->bcast_sta_id;
309 else {
310 /* Find index into station table for destination station */
311 sta_id = iwl_sta_id_or_broadcast(priv, ctx, info->control.sta);
312 if (sta_id == IWL_INVALID_STATION) {
313 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
314 hdr->addr1);
315 goto drop_unlock_priv;
316 }
317 }
318
319 IWL_DEBUG_TX(priv, "station Id %d\n", sta_id);
320
321 if (info->control.sta)
322 sta_priv = (void *)info->control.sta->drv_priv;
323
324 if (sta_priv && sta_priv->asleep &&
325 (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER)) {
326 /*
327 * This sends an asynchronous command to the device,
328 * but we can rely on it being processed before the
329 * next frame is processed -- and the next frame to
330 * this station is the one that will consume this
331 * counter.
332 * For now set the counter to just 1 since we do not
333 * support uAPSD yet.
334 *
335 * FIXME: If we get two non-bufferable frames one
336 * after the other, we might only send out one of
337 * them because this is racy.
338 */
339 iwl_sta_modify_sleep_tx_count(priv, sta_id, 1);
340 }
341
342 if (info->flags & IEEE80211_TX_CTL_AMPDU)
343 is_agg = true;
344
345 /* irqs already disabled/saved above when locking priv->shrd->lock */
346 spin_lock(&priv->shrd->sta_lock);
347
348 dev_cmd = kmem_cache_alloc(priv->tx_cmd_pool, GFP_ATOMIC);
349
350 if (unlikely(!dev_cmd))
351 goto drop_unlock_sta;
352
353 memset(dev_cmd, 0, sizeof(*dev_cmd));
354 tx_cmd = (struct iwl_tx_cmd *) dev_cmd->payload;
355
356 /* Total # bytes to be transmitted */
357 len = (u16)skb->len;
358 tx_cmd->len = cpu_to_le16(len);
359
360 if (info->control.hw_key)
361 iwlagn_tx_cmd_build_hwcrypto(priv, info, tx_cmd, skb, sta_id);
362
363 /* TODO need this for burst mode later on */
364 iwlagn_tx_cmd_build_basic(priv, skb, tx_cmd, info, hdr, sta_id);
365 iwl_dbg_log_tx_data_frame(priv, len, hdr);
366
367 iwlagn_tx_cmd_build_rate(priv, tx_cmd, info, fc);
368
369 iwl_update_stats(priv, true, fc, len);
370
371 memset(&info->status, 0, sizeof(info->status));
372
373 info->driver_data[0] = ctx;
374 info->driver_data[1] = dev_cmd;
375
376 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
377 u8 *qc = NULL;
378 struct iwl_tid_data *tid_data;
379 qc = ieee80211_get_qos_ctl(hdr);
380 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
381 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
382 goto drop_unlock_sta;
383 tid_data = &priv->tid_data[sta_id][tid];
384
385 /* aggregation is on for this <sta,tid> */
386 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
387 tid_data->agg.state != IWL_AGG_ON) {
388 IWL_ERR(priv, "TX_CTL_AMPDU while not in AGG:"
389 " Tx flags = 0x%08x, agg.state = %d",
390 info->flags, tid_data->agg.state);
391 IWL_ERR(priv, "sta_id = %d, tid = %d seq_num = %d",
392 sta_id, tid, SEQ_TO_SN(tid_data->seq_number));
393 goto drop_unlock_sta;
394 }
395
396 /* We can receive packets from the stack in IWL_AGG_{ON,OFF}
397 * only. Check this here.
398 */
399 if (WARN_ONCE(tid_data->agg.state != IWL_AGG_ON &&
400 tid_data->agg.state != IWL_AGG_OFF,
401 "Tx while agg.state = %d", tid_data->agg.state))
402 goto drop_unlock_sta;
403
404 seq_number = tid_data->seq_number;
405 seq_number &= IEEE80211_SCTL_SEQ;
406 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
407 hdr->seq_ctrl |= cpu_to_le16(seq_number);
408 seq_number += 0x10;
409 }
410
411 /* Copy MAC header from skb into command buffer */
412 memcpy(tx_cmd->hdr, hdr, hdr_len);
413
414 if (iwl_trans_tx(trans(priv), skb, dev_cmd, ctx->ctxid, sta_id, tid))
415 goto drop_unlock_sta;
416
417 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc) &&
418 !ieee80211_has_morefrags(fc))
419 priv->tid_data[sta_id][tid].seq_number = seq_number;
420
421 spin_unlock(&priv->shrd->sta_lock);
422 spin_unlock_irqrestore(&priv->shrd->lock, flags);
423
424 /*
425 * Avoid atomic ops if it isn't an associated client.
426 * Also, if this is a packet for aggregation, don't
427 * increase the counter because the ucode will stop
428 * aggregation queues when their respective station
429 * goes to sleep.
430 */
431 if (sta_priv && sta_priv->client && !is_agg)
432 atomic_inc(&sta_priv->pending_frames);
433
434 return 0;
435
436 drop_unlock_sta:
437 if (dev_cmd)
438 kmem_cache_free(priv->tx_cmd_pool, dev_cmd);
439 spin_unlock(&priv->shrd->sta_lock);
440 drop_unlock_priv:
441 spin_unlock_irqrestore(&priv->shrd->lock, flags);
442 return -1;
443 }
444
445 int iwlagn_tx_agg_stop(struct iwl_priv *priv, struct ieee80211_vif *vif,
446 struct ieee80211_sta *sta, u16 tid)
447 {
448 struct iwl_tid_data *tid_data;
449 unsigned long flags;
450 int sta_id;
451
452 sta_id = iwl_sta_id(sta);
453
454 if (sta_id == IWL_INVALID_STATION) {
455 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
456 return -ENXIO;
457 }
458
459 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
460
461 tid_data = &priv->tid_data[sta_id][tid];
462
463 switch (priv->tid_data[sta_id][tid].agg.state) {
464 case IWL_EMPTYING_HW_QUEUE_ADDBA:
465 /*
466 * This can happen if the peer stops aggregation
467 * again before we've had a chance to drain the
468 * queue we selected previously, i.e. before the
469 * session was really started completely.
470 */
471 IWL_DEBUG_HT(priv, "AGG stop before setup done\n");
472 goto turn_off;
473 case IWL_AGG_ON:
474 break;
475 default:
476 IWL_WARN(priv, "Stopping AGG while state not ON "
477 "or starting for %d on %d (%d)\n", sta_id, tid,
478 priv->tid_data[sta_id][tid].agg.state);
479 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
480 return 0;
481 }
482
483 tid_data->agg.ssn = SEQ_TO_SN(tid_data->seq_number);
484
485 /* There are still packets for this RA / TID in the HW */
486 if (tid_data->agg.ssn != tid_data->next_reclaimed) {
487 IWL_DEBUG_TX_QUEUES(priv, "Can't proceed: ssn %d, "
488 "next_recl = %d",
489 tid_data->agg.ssn,
490 tid_data->next_reclaimed);
491 priv->tid_data[sta_id][tid].agg.state =
492 IWL_EMPTYING_HW_QUEUE_DELBA;
493 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
494 return 0;
495 }
496
497 IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d",
498 tid_data->agg.ssn);
499 turn_off:
500 priv->tid_data[sta_id][tid].agg.state = IWL_AGG_OFF;
501
502 /* do not restore/save irqs */
503 spin_unlock(&priv->shrd->sta_lock);
504 spin_lock(&priv->shrd->lock);
505
506 iwl_trans_tx_agg_disable(trans(priv), sta_id, tid);
507
508 spin_unlock_irqrestore(&priv->shrd->lock, flags);
509
510 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
511
512 return 0;
513 }
514
515 int iwlagn_tx_agg_start(struct iwl_priv *priv, struct ieee80211_vif *vif,
516 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
517 {
518 struct iwl_tid_data *tid_data;
519 unsigned long flags;
520 int sta_id;
521 int ret;
522
523 IWL_DEBUG_HT(priv, "TX AGG request on ra = %pM tid = %d\n",
524 sta->addr, tid);
525
526 sta_id = iwl_sta_id(sta);
527 if (sta_id == IWL_INVALID_STATION) {
528 IWL_ERR(priv, "Start AGG on invalid station\n");
529 return -ENXIO;
530 }
531 if (unlikely(tid >= IWL_MAX_TID_COUNT))
532 return -EINVAL;
533
534 if (priv->tid_data[sta_id][tid].agg.state != IWL_AGG_OFF) {
535 IWL_ERR(priv, "Start AGG when state is not IWL_AGG_OFF !\n");
536 return -ENXIO;
537 }
538
539 ret = iwl_sta_tx_modify_enable_tid(priv, sta_id, tid);
540 if (ret)
541 return ret;
542
543 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
544
545 tid_data = &priv->tid_data[sta_id][tid];
546 tid_data->agg.ssn = SEQ_TO_SN(tid_data->seq_number);
547
548 *ssn = tid_data->agg.ssn;
549
550 ret = iwl_trans_tx_agg_alloc(trans(priv), sta_id, tid);
551 if (ret) {
552 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
553 return ret;
554 }
555
556 if (*ssn == tid_data->next_reclaimed) {
557 IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d",
558 tid_data->agg.ssn);
559 tid_data->agg.state = IWL_AGG_ON;
560 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
561 } else {
562 IWL_DEBUG_TX_QUEUES(priv, "Can't proceed: ssn %d, "
563 "next_reclaimed = %d",
564 tid_data->agg.ssn,
565 tid_data->next_reclaimed);
566 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA;
567 }
568
569 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
570
571 return ret;
572 }
573
574 int iwlagn_tx_agg_oper(struct iwl_priv *priv, struct ieee80211_vif *vif,
575 struct ieee80211_sta *sta, u16 tid, u8 buf_size)
576 {
577 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
578 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
579 unsigned long flags;
580 u16 ssn;
581
582 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
583
584 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
585 ssn = priv->tid_data[sta_priv->sta_id][tid].agg.ssn;
586 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
587
588 iwl_trans_tx_agg_setup(trans(priv), ctx->ctxid, sta_priv->sta_id, tid,
589 buf_size, ssn);
590
591 /*
592 * If the limit is 0, then it wasn't initialised yet,
593 * use the default. We can do that since we take the
594 * minimum below, and we don't want to go above our
595 * default due to hardware restrictions.
596 */
597 if (sta_priv->max_agg_bufsize == 0)
598 sta_priv->max_agg_bufsize =
599 LINK_QUAL_AGG_FRAME_LIMIT_DEF;
600
601 /*
602 * Even though in theory the peer could have different
603 * aggregation reorder buffer sizes for different sessions,
604 * our ucode doesn't allow for that and has a global limit
605 * for each station. Therefore, use the minimum of all the
606 * aggregation sessions and our default value.
607 */
608 sta_priv->max_agg_bufsize =
609 min(sta_priv->max_agg_bufsize, buf_size);
610
611 if (cfg(priv)->ht_params &&
612 cfg(priv)->ht_params->use_rts_for_aggregation) {
613 /*
614 * switch to RTS/CTS if it is the prefer protection
615 * method for HT traffic
616 */
617
618 sta_priv->lq_sta.lq.general_params.flags |=
619 LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
620 }
621 priv->agg_tids_count++;
622 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
623 priv->agg_tids_count);
624
625 sta_priv->lq_sta.lq.agg_params.agg_frame_cnt_limit =
626 sta_priv->max_agg_bufsize;
627
628 IWL_DEBUG_HT(priv, "Tx aggregation enabled on ra = %pM tid = %d\n",
629 sta->addr, tid);
630
631 return iwl_send_lq_cmd(priv, ctx,
632 &sta_priv->lq_sta.lq, CMD_ASYNC, false);
633 }
634
635 static void iwlagn_check_ratid_empty(struct iwl_priv *priv, int sta_id, u8 tid)
636 {
637 struct iwl_tid_data *tid_data = &priv->tid_data[sta_id][tid];
638 enum iwl_rxon_context_id ctx;
639 struct ieee80211_vif *vif;
640 u8 *addr;
641
642 lockdep_assert_held(&priv->shrd->sta_lock);
643
644 addr = priv->stations[sta_id].sta.sta.addr;
645 ctx = priv->stations[sta_id].ctxid;
646 vif = priv->contexts[ctx].vif;
647
648 switch (priv->tid_data[sta_id][tid].agg.state) {
649 case IWL_EMPTYING_HW_QUEUE_DELBA:
650 /* There are no packets for this RA / TID in the HW any more */
651 if (tid_data->agg.ssn == tid_data->next_reclaimed) {
652 IWL_DEBUG_TX_QUEUES(priv,
653 "Can continue DELBA flow ssn = next_recl ="
654 " %d", tid_data->next_reclaimed);
655 iwl_trans_tx_agg_disable(trans(priv), sta_id, tid);
656 tid_data->agg.state = IWL_AGG_OFF;
657 ieee80211_stop_tx_ba_cb_irqsafe(vif, addr, tid);
658 }
659 break;
660 case IWL_EMPTYING_HW_QUEUE_ADDBA:
661 /* There are no packets for this RA / TID in the HW any more */
662 if (tid_data->agg.ssn == tid_data->next_reclaimed) {
663 IWL_DEBUG_TX_QUEUES(priv,
664 "Can continue ADDBA flow ssn = next_recl ="
665 " %d", tid_data->next_reclaimed);
666 tid_data->agg.state = IWL_AGG_ON;
667 ieee80211_start_tx_ba_cb_irqsafe(vif, addr, tid);
668 }
669 break;
670 default:
671 break;
672 }
673 }
674
675 static void iwlagn_non_agg_tx_status(struct iwl_priv *priv,
676 struct iwl_rxon_context *ctx,
677 const u8 *addr1)
678 {
679 struct ieee80211_sta *sta;
680 struct iwl_station_priv *sta_priv;
681
682 rcu_read_lock();
683 sta = ieee80211_find_sta(ctx->vif, addr1);
684 if (sta) {
685 sta_priv = (void *)sta->drv_priv;
686 /* avoid atomic ops if this isn't a client */
687 if (sta_priv->client &&
688 atomic_dec_return(&sta_priv->pending_frames) == 0)
689 ieee80211_sta_block_awake(priv->hw, sta, false);
690 }
691 rcu_read_unlock();
692 }
693
694 /**
695 * translate ucode response to mac80211 tx status control values
696 */
697 static void iwlagn_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
698 struct ieee80211_tx_info *info)
699 {
700 struct ieee80211_tx_rate *r = &info->control.rates[0];
701
702 info->antenna_sel_tx =
703 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
704 if (rate_n_flags & RATE_MCS_HT_MSK)
705 r->flags |= IEEE80211_TX_RC_MCS;
706 if (rate_n_flags & RATE_MCS_GF_MSK)
707 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
708 if (rate_n_flags & RATE_MCS_HT40_MSK)
709 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
710 if (rate_n_flags & RATE_MCS_DUP_MSK)
711 r->flags |= IEEE80211_TX_RC_DUP_DATA;
712 if (rate_n_flags & RATE_MCS_SGI_MSK)
713 r->flags |= IEEE80211_TX_RC_SHORT_GI;
714 r->idx = iwlagn_hwrate_to_mac80211_idx(rate_n_flags, info->band);
715 }
716
717 #ifdef CONFIG_IWLWIFI_DEBUG
718 const char *iwl_get_tx_fail_reason(u32 status)
719 {
720 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
721 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
722
723 switch (status & TX_STATUS_MSK) {
724 case TX_STATUS_SUCCESS:
725 return "SUCCESS";
726 TX_STATUS_POSTPONE(DELAY);
727 TX_STATUS_POSTPONE(FEW_BYTES);
728 TX_STATUS_POSTPONE(BT_PRIO);
729 TX_STATUS_POSTPONE(QUIET_PERIOD);
730 TX_STATUS_POSTPONE(CALC_TTAK);
731 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
732 TX_STATUS_FAIL(SHORT_LIMIT);
733 TX_STATUS_FAIL(LONG_LIMIT);
734 TX_STATUS_FAIL(FIFO_UNDERRUN);
735 TX_STATUS_FAIL(DRAIN_FLOW);
736 TX_STATUS_FAIL(RFKILL_FLUSH);
737 TX_STATUS_FAIL(LIFE_EXPIRE);
738 TX_STATUS_FAIL(DEST_PS);
739 TX_STATUS_FAIL(HOST_ABORTED);
740 TX_STATUS_FAIL(BT_RETRY);
741 TX_STATUS_FAIL(STA_INVALID);
742 TX_STATUS_FAIL(FRAG_DROPPED);
743 TX_STATUS_FAIL(TID_DISABLE);
744 TX_STATUS_FAIL(FIFO_FLUSHED);
745 TX_STATUS_FAIL(INSUFFICIENT_CF_POLL);
746 TX_STATUS_FAIL(PASSIVE_NO_RX);
747 TX_STATUS_FAIL(NO_BEACON_ON_RADAR);
748 }
749
750 return "UNKNOWN";
751
752 #undef TX_STATUS_FAIL
753 #undef TX_STATUS_POSTPONE
754 }
755 #endif /* CONFIG_IWLWIFI_DEBUG */
756
757 static void iwlagn_count_agg_tx_err_status(struct iwl_priv *priv, u16 status)
758 {
759 status &= AGG_TX_STATUS_MSK;
760
761 switch (status) {
762 case AGG_TX_STATE_UNDERRUN_MSK:
763 priv->reply_agg_tx_stats.underrun++;
764 break;
765 case AGG_TX_STATE_BT_PRIO_MSK:
766 priv->reply_agg_tx_stats.bt_prio++;
767 break;
768 case AGG_TX_STATE_FEW_BYTES_MSK:
769 priv->reply_agg_tx_stats.few_bytes++;
770 break;
771 case AGG_TX_STATE_ABORT_MSK:
772 priv->reply_agg_tx_stats.abort++;
773 break;
774 case AGG_TX_STATE_LAST_SENT_TTL_MSK:
775 priv->reply_agg_tx_stats.last_sent_ttl++;
776 break;
777 case AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK:
778 priv->reply_agg_tx_stats.last_sent_try++;
779 break;
780 case AGG_TX_STATE_LAST_SENT_BT_KILL_MSK:
781 priv->reply_agg_tx_stats.last_sent_bt_kill++;
782 break;
783 case AGG_TX_STATE_SCD_QUERY_MSK:
784 priv->reply_agg_tx_stats.scd_query++;
785 break;
786 case AGG_TX_STATE_TEST_BAD_CRC32_MSK:
787 priv->reply_agg_tx_stats.bad_crc32++;
788 break;
789 case AGG_TX_STATE_RESPONSE_MSK:
790 priv->reply_agg_tx_stats.response++;
791 break;
792 case AGG_TX_STATE_DUMP_TX_MSK:
793 priv->reply_agg_tx_stats.dump_tx++;
794 break;
795 case AGG_TX_STATE_DELAY_TX_MSK:
796 priv->reply_agg_tx_stats.delay_tx++;
797 break;
798 default:
799 priv->reply_agg_tx_stats.unknown++;
800 break;
801 }
802 }
803
804 static void iwl_rx_reply_tx_agg(struct iwl_priv *priv,
805 struct iwlagn_tx_resp *tx_resp)
806 {
807 struct agg_tx_status *frame_status = &tx_resp->status;
808 int tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
809 IWLAGN_TX_RES_TID_POS;
810 int sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
811 IWLAGN_TX_RES_RA_POS;
812 struct iwl_ht_agg *agg = &priv->tid_data[sta_id][tid].agg;
813 u32 status = le16_to_cpu(tx_resp->status.status);
814 int i;
815
816 WARN_ON(tid == IWL_TID_NON_QOS);
817
818 if (agg->wait_for_ba)
819 IWL_DEBUG_TX_REPLY(priv,
820 "got tx response w/o block-ack\n");
821
822 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
823 agg->wait_for_ba = (tx_resp->frame_count > 1);
824
825 /*
826 * If the BT kill count is non-zero, we'll get this
827 * notification again.
828 */
829 if (tx_resp->bt_kill_count && tx_resp->frame_count == 1 &&
830 cfg(priv)->bt_params &&
831 cfg(priv)->bt_params->advanced_bt_coexist) {
832 IWL_DEBUG_COEX(priv, "receive reply tx w/ bt_kill\n");
833 }
834
835 if (tx_resp->frame_count == 1)
836 return;
837
838 /* Construct bit-map of pending frames within Tx window */
839 for (i = 0; i < tx_resp->frame_count; i++) {
840 u16 fstatus = le16_to_cpu(frame_status[i].status);
841
842 if (status & AGG_TX_STATUS_MSK)
843 iwlagn_count_agg_tx_err_status(priv, fstatus);
844
845 if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
846 AGG_TX_STATE_ABORT_MSK))
847 continue;
848
849 IWL_DEBUG_TX_REPLY(priv, "status %s (0x%08x), "
850 "try-count (0x%08x)\n",
851 iwl_get_agg_tx_fail_reason(fstatus),
852 fstatus & AGG_TX_STATUS_MSK,
853 fstatus & AGG_TX_TRY_MSK);
854 }
855 }
856
857 #ifdef CONFIG_IWLWIFI_DEBUG
858 #define AGG_TX_STATE_FAIL(x) case AGG_TX_STATE_ ## x: return #x
859
860 const char *iwl_get_agg_tx_fail_reason(u16 status)
861 {
862 status &= AGG_TX_STATUS_MSK;
863 switch (status) {
864 case AGG_TX_STATE_TRANSMITTED:
865 return "SUCCESS";
866 AGG_TX_STATE_FAIL(UNDERRUN_MSK);
867 AGG_TX_STATE_FAIL(BT_PRIO_MSK);
868 AGG_TX_STATE_FAIL(FEW_BYTES_MSK);
869 AGG_TX_STATE_FAIL(ABORT_MSK);
870 AGG_TX_STATE_FAIL(LAST_SENT_TTL_MSK);
871 AGG_TX_STATE_FAIL(LAST_SENT_TRY_CNT_MSK);
872 AGG_TX_STATE_FAIL(LAST_SENT_BT_KILL_MSK);
873 AGG_TX_STATE_FAIL(SCD_QUERY_MSK);
874 AGG_TX_STATE_FAIL(TEST_BAD_CRC32_MSK);
875 AGG_TX_STATE_FAIL(RESPONSE_MSK);
876 AGG_TX_STATE_FAIL(DUMP_TX_MSK);
877 AGG_TX_STATE_FAIL(DELAY_TX_MSK);
878 }
879
880 return "UNKNOWN";
881 }
882 #endif /* CONFIG_IWLWIFI_DEBUG */
883
884 static inline u32 iwlagn_get_scd_ssn(struct iwlagn_tx_resp *tx_resp)
885 {
886 return le32_to_cpup((__le32 *)&tx_resp->status +
887 tx_resp->frame_count) & MAX_SN;
888 }
889
890 static void iwlagn_count_tx_err_status(struct iwl_priv *priv, u16 status)
891 {
892 status &= TX_STATUS_MSK;
893
894 switch (status) {
895 case TX_STATUS_POSTPONE_DELAY:
896 priv->reply_tx_stats.pp_delay++;
897 break;
898 case TX_STATUS_POSTPONE_FEW_BYTES:
899 priv->reply_tx_stats.pp_few_bytes++;
900 break;
901 case TX_STATUS_POSTPONE_BT_PRIO:
902 priv->reply_tx_stats.pp_bt_prio++;
903 break;
904 case TX_STATUS_POSTPONE_QUIET_PERIOD:
905 priv->reply_tx_stats.pp_quiet_period++;
906 break;
907 case TX_STATUS_POSTPONE_CALC_TTAK:
908 priv->reply_tx_stats.pp_calc_ttak++;
909 break;
910 case TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY:
911 priv->reply_tx_stats.int_crossed_retry++;
912 break;
913 case TX_STATUS_FAIL_SHORT_LIMIT:
914 priv->reply_tx_stats.short_limit++;
915 break;
916 case TX_STATUS_FAIL_LONG_LIMIT:
917 priv->reply_tx_stats.long_limit++;
918 break;
919 case TX_STATUS_FAIL_FIFO_UNDERRUN:
920 priv->reply_tx_stats.fifo_underrun++;
921 break;
922 case TX_STATUS_FAIL_DRAIN_FLOW:
923 priv->reply_tx_stats.drain_flow++;
924 break;
925 case TX_STATUS_FAIL_RFKILL_FLUSH:
926 priv->reply_tx_stats.rfkill_flush++;
927 break;
928 case TX_STATUS_FAIL_LIFE_EXPIRE:
929 priv->reply_tx_stats.life_expire++;
930 break;
931 case TX_STATUS_FAIL_DEST_PS:
932 priv->reply_tx_stats.dest_ps++;
933 break;
934 case TX_STATUS_FAIL_HOST_ABORTED:
935 priv->reply_tx_stats.host_abort++;
936 break;
937 case TX_STATUS_FAIL_BT_RETRY:
938 priv->reply_tx_stats.bt_retry++;
939 break;
940 case TX_STATUS_FAIL_STA_INVALID:
941 priv->reply_tx_stats.sta_invalid++;
942 break;
943 case TX_STATUS_FAIL_FRAG_DROPPED:
944 priv->reply_tx_stats.frag_drop++;
945 break;
946 case TX_STATUS_FAIL_TID_DISABLE:
947 priv->reply_tx_stats.tid_disable++;
948 break;
949 case TX_STATUS_FAIL_FIFO_FLUSHED:
950 priv->reply_tx_stats.fifo_flush++;
951 break;
952 case TX_STATUS_FAIL_INSUFFICIENT_CF_POLL:
953 priv->reply_tx_stats.insuff_cf_poll++;
954 break;
955 case TX_STATUS_FAIL_PASSIVE_NO_RX:
956 priv->reply_tx_stats.fail_hw_drop++;
957 break;
958 case TX_STATUS_FAIL_NO_BEACON_ON_RADAR:
959 priv->reply_tx_stats.sta_color_mismatch++;
960 break;
961 default:
962 priv->reply_tx_stats.unknown++;
963 break;
964 }
965 }
966
967 static void iwlagn_set_tx_status(struct iwl_priv *priv,
968 struct ieee80211_tx_info *info,
969 struct iwlagn_tx_resp *tx_resp,
970 bool is_agg)
971 {
972 u16 status = le16_to_cpu(tx_resp->status.status);
973
974 info->status.rates[0].count = tx_resp->failure_frame + 1;
975 if (is_agg)
976 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
977 info->flags |= iwl_tx_status_to_mac80211(status);
978 iwlagn_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
979 info);
980 if (!iwl_is_tx_success(status))
981 iwlagn_count_tx_err_status(priv, status);
982 }
983
984 static void iwl_check_abort_status(struct iwl_priv *priv,
985 u8 frame_count, u32 status)
986 {
987 if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) {
988 IWL_ERR(priv, "Tx flush command to flush out all frames\n");
989 if (!test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
990 queue_work(priv->workqueue, &priv->tx_flush);
991 }
992 }
993
994 int iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb,
995 struct iwl_device_cmd *cmd)
996 {
997 struct iwl_rx_packet *pkt = rxb_addr(rxb);
998 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
999 int txq_id = SEQ_TO_QUEUE(sequence);
1000 int cmd_index __maybe_unused = SEQ_TO_INDEX(sequence);
1001 struct iwlagn_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
1002 struct ieee80211_hdr *hdr;
1003 u32 status = le16_to_cpu(tx_resp->status.status);
1004 u16 ssn = iwlagn_get_scd_ssn(tx_resp);
1005 int tid;
1006 int sta_id;
1007 int freed;
1008 struct ieee80211_tx_info *info;
1009 unsigned long flags;
1010 struct sk_buff_head skbs;
1011 struct sk_buff *skb;
1012 struct iwl_rxon_context *ctx;
1013 bool is_agg = (txq_id >= IWLAGN_FIRST_AMPDU_QUEUE);
1014
1015 tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
1016 IWLAGN_TX_RES_TID_POS;
1017 sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
1018 IWLAGN_TX_RES_RA_POS;
1019
1020 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1021
1022 if (is_agg)
1023 iwl_rx_reply_tx_agg(priv, tx_resp);
1024
1025 if (tx_resp->frame_count == 1) {
1026 u16 next_reclaimed = le16_to_cpu(tx_resp->seq_ctl);
1027 next_reclaimed = SEQ_TO_SN(next_reclaimed + 0x10);
1028
1029 if (is_agg) {
1030 /* If this is an aggregation queue, we can rely on the
1031 * ssn since the wifi sequence number corresponds to
1032 * the index in the TFD ring (%256).
1033 * The seq_ctl is the sequence control of the packet
1034 * to which this Tx response relates. But if there is a
1035 * hole in the bitmap of the BA we received, this Tx
1036 * response may allow to reclaim the hole and all the
1037 * subsequent packets that were already acked.
1038 * In that case, seq_ctl != ssn, and the next packet
1039 * to be reclaimed will be ssn and not seq_ctl.
1040 */
1041 next_reclaimed = ssn;
1042 }
1043
1044 __skb_queue_head_init(&skbs);
1045
1046 if (tid != IWL_TID_NON_QOS) {
1047 priv->tid_data[sta_id][tid].next_reclaimed =
1048 next_reclaimed;
1049 IWL_DEBUG_TX_REPLY(priv, "Next reclaimed packet:%d",
1050 next_reclaimed);
1051 }
1052
1053 /*we can free until ssn % q.n_bd not inclusive */
1054 WARN_ON(iwl_trans_reclaim(trans(priv), sta_id, tid, txq_id,
1055 ssn, status, &skbs));
1056 iwlagn_check_ratid_empty(priv, sta_id, tid);
1057 freed = 0;
1058 while (!skb_queue_empty(&skbs)) {
1059 skb = __skb_dequeue(&skbs);
1060 hdr = (struct ieee80211_hdr *)skb->data;
1061
1062 if (!ieee80211_is_data_qos(hdr->frame_control))
1063 priv->last_seq_ctl = tx_resp->seq_ctl;
1064
1065 info = IEEE80211_SKB_CB(skb);
1066 ctx = info->driver_data[0];
1067 kmem_cache_free(priv->tx_cmd_pool,
1068 (info->driver_data[1]));
1069
1070 memset(&info->status, 0, sizeof(info->status));
1071
1072 if (status == TX_STATUS_FAIL_PASSIVE_NO_RX &&
1073 iwl_is_associated_ctx(ctx) && ctx->vif &&
1074 ctx->vif->type == NL80211_IFTYPE_STATION) {
1075 ctx->last_tx_rejected = true;
1076 iwl_trans_stop_queue(trans(priv), txq_id,
1077 "Tx on passive channel");
1078
1079 IWL_DEBUG_TX_REPLY(priv,
1080 "TXQ %d status %s (0x%08x) "
1081 "rate_n_flags 0x%x retries %d\n",
1082 txq_id,
1083 iwl_get_tx_fail_reason(status),
1084 status,
1085 le32_to_cpu(tx_resp->rate_n_flags),
1086 tx_resp->failure_frame);
1087
1088 IWL_DEBUG_TX_REPLY(priv,
1089 "FrameCnt = %d, idx=%d\n",
1090 tx_resp->frame_count, cmd_index);
1091 }
1092
1093 /* check if BAR is needed */
1094 if (is_agg && !iwl_is_tx_success(status))
1095 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1096 iwlagn_set_tx_status(priv, IEEE80211_SKB_CB(skb),
1097 tx_resp, is_agg);
1098 if (!is_agg)
1099 iwlagn_non_agg_tx_status(priv, ctx, hdr->addr1);
1100
1101 ieee80211_tx_status_irqsafe(priv->hw, skb);
1102
1103 freed++;
1104 }
1105
1106 WARN_ON(!is_agg && freed != 1);
1107 }
1108
1109 iwl_check_abort_status(priv, tx_resp->frame_count, status);
1110 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1111 return 0;
1112 }
1113
1114 /**
1115 * iwlagn_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
1116 *
1117 * Handles block-acknowledge notification from device, which reports success
1118 * of frames sent via aggregation.
1119 */
1120 int iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv,
1121 struct iwl_rx_mem_buffer *rxb,
1122 struct iwl_device_cmd *cmd)
1123 {
1124 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1125 struct iwl_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba;
1126 struct iwl_ht_agg *agg;
1127 struct sk_buff_head reclaimed_skbs;
1128 struct ieee80211_tx_info *info;
1129 struct ieee80211_hdr *hdr;
1130 struct sk_buff *skb;
1131 unsigned long flags;
1132 int sta_id;
1133 int tid;
1134 int freed;
1135
1136 /* "flow" corresponds to Tx queue */
1137 u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
1138
1139 /* "ssn" is start of block-ack Tx window, corresponds to index
1140 * (in Tx queue's circular buffer) of first TFD/frame in window */
1141 u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
1142
1143 if (scd_flow >= hw_params(priv).max_txq_num) {
1144 IWL_ERR(priv,
1145 "BUG_ON scd_flow is bigger than number of queues\n");
1146 return 0;
1147 }
1148
1149 sta_id = ba_resp->sta_id;
1150 tid = ba_resp->tid;
1151 agg = &priv->tid_data[sta_id][tid].agg;
1152
1153 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1154
1155 if (unlikely(!agg->wait_for_ba)) {
1156 if (unlikely(ba_resp->bitmap))
1157 IWL_ERR(priv, "Received BA when not expected\n");
1158 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1159 return 0;
1160 }
1161
1162 __skb_queue_head_init(&reclaimed_skbs);
1163
1164 /* Release all TFDs before the SSN, i.e. all TFDs in front of
1165 * block-ack window (we assume that they've been successfully
1166 * transmitted ... if not, it's too late anyway). */
1167 if (iwl_trans_reclaim(trans(priv), sta_id, tid, scd_flow,
1168 ba_resp_scd_ssn, 0, &reclaimed_skbs)) {
1169 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1170 return 0;
1171 }
1172
1173 IWL_DEBUG_TX_REPLY(priv, "REPLY_COMPRESSED_BA [%d] Received from %pM, "
1174 "sta_id = %d\n",
1175 agg->wait_for_ba,
1176 (u8 *) &ba_resp->sta_addr_lo32,
1177 ba_resp->sta_id);
1178 IWL_DEBUG_TX_REPLY(priv, "TID = %d, SeqCtl = %d, bitmap = 0x%llx, "
1179 "scd_flow = %d, scd_ssn = %d\n",
1180 ba_resp->tid, le16_to_cpu(ba_resp->seq_ctl),
1181 (unsigned long long)le64_to_cpu(ba_resp->bitmap),
1182 scd_flow, ba_resp_scd_ssn);
1183
1184 /* Mark that the expected block-ack response arrived */
1185 agg->wait_for_ba = false;
1186
1187 /* Sanity check values reported by uCode */
1188 if (ba_resp->txed_2_done > ba_resp->txed) {
1189 IWL_DEBUG_TX_REPLY(priv,
1190 "bogus sent(%d) and ack(%d) count\n",
1191 ba_resp->txed, ba_resp->txed_2_done);
1192 /*
1193 * set txed_2_done = txed,
1194 * so it won't impact rate scale
1195 */
1196 ba_resp->txed = ba_resp->txed_2_done;
1197 }
1198 IWL_DEBUG_HT(priv, "agg frames sent:%d, acked:%d\n",
1199 ba_resp->txed, ba_resp->txed_2_done);
1200
1201 priv->tid_data[sta_id][tid].next_reclaimed = ba_resp_scd_ssn;
1202
1203 iwlagn_check_ratid_empty(priv, sta_id, tid);
1204 freed = 0;
1205 while (!skb_queue_empty(&reclaimed_skbs)) {
1206
1207 skb = __skb_dequeue(&reclaimed_skbs);
1208 hdr = (struct ieee80211_hdr *)skb->data;
1209
1210 if (ieee80211_is_data_qos(hdr->frame_control))
1211 freed++;
1212 else
1213 WARN_ON_ONCE(1);
1214
1215 info = IEEE80211_SKB_CB(skb);
1216 kmem_cache_free(priv->tx_cmd_pool, (info->driver_data[1]));
1217
1218 if (freed == 1) {
1219 /* this is the first skb we deliver in this batch */
1220 /* put the rate scaling data there */
1221 info = IEEE80211_SKB_CB(skb);
1222 memset(&info->status, 0, sizeof(info->status));
1223 info->flags |= IEEE80211_TX_STAT_ACK;
1224 info->flags |= IEEE80211_TX_STAT_AMPDU;
1225 info->status.ampdu_ack_len = ba_resp->txed_2_done;
1226 info->status.ampdu_len = ba_resp->txed;
1227 iwlagn_hwrate_to_tx_control(priv, agg->rate_n_flags,
1228 info);
1229 }
1230
1231 ieee80211_tx_status_irqsafe(priv->hw, skb);
1232 }
1233
1234 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1235 return 0;
1236 }
Linux kernel - Deliverables
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