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[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 {
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_NO_PS_BUFFER)) {
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 * FIXME: If we get two non-bufferable frames one
335 * after the other, we might only send out one of
336 * them because this is racy.
337 */
338 iwl_sta_modify_sleep_tx_count(priv, sta_id, 1);
339 }
340
341 if (info->flags & IEEE80211_TX_CTL_AMPDU)
342 is_agg = true;
343
344 /* irqs already disabled/saved above when locking priv->shrd->lock */
345 spin_lock(&priv->shrd->sta_lock);
346
347 dev_cmd = kmem_cache_alloc(priv->tx_cmd_pool, GFP_ATOMIC);
348
349 if (unlikely(!dev_cmd))
350 goto drop_unlock_sta;
351
352 memset(dev_cmd, 0, sizeof(*dev_cmd));
353 tx_cmd = (struct iwl_tx_cmd *) dev_cmd->payload;
354
355 /* Total # bytes to be transmitted */
356 len = (u16)skb->len;
357 tx_cmd->len = cpu_to_le16(len);
358
359 if (info->control.hw_key)
360 iwlagn_tx_cmd_build_hwcrypto(priv, info, tx_cmd, skb);
361
362 /* TODO need this for burst mode later on */
363 iwlagn_tx_cmd_build_basic(priv, skb, tx_cmd, info, hdr, sta_id);
364 iwl_dbg_log_tx_data_frame(priv, len, hdr);
365
366 iwlagn_tx_cmd_build_rate(priv, tx_cmd, info, fc);
367
368 iwl_update_stats(priv, true, fc, len);
369
370 memset(&info->status, 0, sizeof(info->status));
371
372 info->driver_data[0] = ctx;
373 info->driver_data[1] = dev_cmd;
374
375 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
376 u8 *qc = NULL;
377 struct iwl_tid_data *tid_data;
378 qc = ieee80211_get_qos_ctl(hdr);
379 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
380 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
381 goto drop_unlock_sta;
382 tid_data = &priv->tid_data[sta_id][tid];
383
384 /* aggregation is on for this <sta,tid> */
385 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
386 tid_data->agg.state != IWL_AGG_ON) {
387 IWL_ERR(priv, "TX_CTL_AMPDU while not in AGG:"
388 " Tx flags = 0x%08x, agg.state = %d",
389 info->flags, tid_data->agg.state);
390 IWL_ERR(priv, "sta_id = %d, tid = %d seq_num = %d",
391 sta_id, tid, SEQ_TO_SN(tid_data->seq_number));
392 goto drop_unlock_sta;
393 }
394
395 /* We can receive packets from the stack in IWL_AGG_{ON,OFF}
396 * only. Check this here.
397 */
398 if (WARN_ONCE(tid_data->agg.state != IWL_AGG_ON &&
399 tid_data->agg.state != IWL_AGG_OFF,
400 "Tx while agg.state = %d", tid_data->agg.state))
401 goto drop_unlock_sta;
402
403 seq_number = tid_data->seq_number;
404 seq_number &= IEEE80211_SCTL_SEQ;
405 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
406 hdr->seq_ctrl |= cpu_to_le16(seq_number);
407 seq_number += 0x10;
408 }
409
410 /* Copy MAC header from skb into command buffer */
411 memcpy(tx_cmd->hdr, hdr, hdr_len);
412
413 if (iwl_trans_tx(trans(priv), skb, dev_cmd, ctx->ctxid, sta_id, tid))
414 goto drop_unlock_sta;
415
416 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc) &&
417 !ieee80211_has_morefrags(fc))
418 priv->tid_data[sta_id][tid].seq_number = seq_number;
419
420 spin_unlock(&priv->shrd->sta_lock);
421 spin_unlock_irqrestore(&priv->shrd->lock, flags);
422
423 /*
424 * Avoid atomic ops if it isn't an associated client.
425 * Also, if this is a packet for aggregation, don't
426 * increase the counter because the ucode will stop
427 * aggregation queues when their respective station
428 * goes to sleep.
429 */
430 if (sta_priv && sta_priv->client && !is_agg)
431 atomic_inc(&sta_priv->pending_frames);
432
433 return 0;
434
435 drop_unlock_sta:
436 if (dev_cmd)
437 kmem_cache_free(priv->tx_cmd_pool, dev_cmd);
438 spin_unlock(&priv->shrd->sta_lock);
439 drop_unlock_priv:
440 spin_unlock_irqrestore(&priv->shrd->lock, flags);
441 return -1;
442 }
443
444 int iwlagn_tx_agg_stop(struct iwl_priv *priv, struct ieee80211_vif *vif,
445 struct ieee80211_sta *sta, u16 tid)
446 {
447 struct iwl_tid_data *tid_data;
448 unsigned long flags;
449 int sta_id;
450
451 sta_id = iwl_sta_id(sta);
452
453 if (sta_id == IWL_INVALID_STATION) {
454 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
455 return -ENXIO;
456 }
457
458 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
459
460 tid_data = &priv->tid_data[sta_id][tid];
461
462 switch (priv->tid_data[sta_id][tid].agg.state) {
463 case IWL_EMPTYING_HW_QUEUE_ADDBA:
464 /*
465 * This can happen if the peer stops aggregation
466 * again before we've had a chance to drain the
467 * queue we selected previously, i.e. before the
468 * session was really started completely.
469 */
470 IWL_DEBUG_HT(priv, "AGG stop before setup done\n");
471 goto turn_off;
472 case IWL_AGG_ON:
473 break;
474 default:
475 IWL_WARN(priv, "Stopping AGG while state not ON "
476 "or starting for %d on %d (%d)\n", sta_id, tid,
477 priv->tid_data[sta_id][tid].agg.state);
478 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
479 return 0;
480 }
481
482 tid_data->agg.ssn = SEQ_TO_SN(tid_data->seq_number);
483
484 /* There are still packets for this RA / TID in the HW */
485 if (tid_data->agg.ssn != tid_data->next_reclaimed) {
486 IWL_DEBUG_TX_QUEUES(priv, "Can't proceed: ssn %d, "
487 "next_recl = %d",
488 tid_data->agg.ssn,
489 tid_data->next_reclaimed);
490 priv->tid_data[sta_id][tid].agg.state =
491 IWL_EMPTYING_HW_QUEUE_DELBA;
492 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
493 return 0;
494 }
495
496 IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d",
497 tid_data->agg.ssn);
498 turn_off:
499 priv->tid_data[sta_id][tid].agg.state = IWL_AGG_OFF;
500
501 /* do not restore/save irqs */
502 spin_unlock(&priv->shrd->sta_lock);
503 spin_lock(&priv->shrd->lock);
504
505 iwl_trans_tx_agg_disable(trans(priv), sta_id, tid);
506
507 spin_unlock_irqrestore(&priv->shrd->lock, flags);
508
509 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
510
511 return 0;
512 }
513
514 int iwlagn_tx_agg_start(struct iwl_priv *priv, struct ieee80211_vif *vif,
515 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
516 {
517 struct iwl_tid_data *tid_data;
518 unsigned long flags;
519 int sta_id;
520 int ret;
521
522 IWL_DEBUG_HT(priv, "TX AGG request on ra = %pM tid = %d\n",
523 sta->addr, tid);
524
525 sta_id = iwl_sta_id(sta);
526 if (sta_id == IWL_INVALID_STATION) {
527 IWL_ERR(priv, "Start AGG on invalid station\n");
528 return -ENXIO;
529 }
530 if (unlikely(tid >= IWL_MAX_TID_COUNT))
531 return -EINVAL;
532
533 if (priv->tid_data[sta_id][tid].agg.state != IWL_AGG_OFF) {
534 IWL_ERR(priv, "Start AGG when state is not IWL_AGG_OFF !\n");
535 return -ENXIO;
536 }
537
538 ret = iwl_sta_tx_modify_enable_tid(priv, sta_id, tid);
539 if (ret)
540 return ret;
541
542 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
543
544 tid_data = &priv->tid_data[sta_id][tid];
545 tid_data->agg.ssn = SEQ_TO_SN(tid_data->seq_number);
546
547 *ssn = tid_data->agg.ssn;
548
549 ret = iwl_trans_tx_agg_alloc(trans(priv), sta_id, tid);
550 if (ret) {
551 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
552 return ret;
553 }
554
555 if (*ssn == tid_data->next_reclaimed) {
556 IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d",
557 tid_data->agg.ssn);
558 tid_data->agg.state = IWL_AGG_ON;
559 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
560 } else {
561 IWL_DEBUG_TX_QUEUES(priv, "Can't proceed: ssn %d, "
562 "next_reclaimed = %d",
563 tid_data->agg.ssn,
564 tid_data->next_reclaimed);
565 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA;
566 }
567
568 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
569
570 return ret;
571 }
572
573 int iwlagn_tx_agg_oper(struct iwl_priv *priv, struct ieee80211_vif *vif,
574 struct ieee80211_sta *sta, u16 tid, u8 buf_size)
575 {
576 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
577 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
578 unsigned long flags;
579 u16 ssn;
580
581 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
582
583 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
584 ssn = priv->tid_data[sta_priv->sta_id][tid].agg.ssn;
585 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
586
587 iwl_trans_tx_agg_setup(trans(priv), ctx->ctxid, sta_priv->sta_id, tid,
588 buf_size, ssn);
589
590 /*
591 * If the limit is 0, then it wasn't initialised yet,
592 * use the default. We can do that since we take the
593 * minimum below, and we don't want to go above our
594 * default due to hardware restrictions.
595 */
596 if (sta_priv->max_agg_bufsize == 0)
597 sta_priv->max_agg_bufsize =
598 LINK_QUAL_AGG_FRAME_LIMIT_DEF;
599
600 /*
601 * Even though in theory the peer could have different
602 * aggregation reorder buffer sizes for different sessions,
603 * our ucode doesn't allow for that and has a global limit
604 * for each station. Therefore, use the minimum of all the
605 * aggregation sessions and our default value.
606 */
607 sta_priv->max_agg_bufsize =
608 min(sta_priv->max_agg_bufsize, buf_size);
609
610 if (cfg(priv)->ht_params &&
611 cfg(priv)->ht_params->use_rts_for_aggregation) {
612 /*
613 * switch to RTS/CTS if it is the prefer protection
614 * method for HT traffic
615 */
616
617 sta_priv->lq_sta.lq.general_params.flags |=
618 LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
619 }
620 priv->agg_tids_count++;
621 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
622 priv->agg_tids_count);
623
624 sta_priv->lq_sta.lq.agg_params.agg_frame_cnt_limit =
625 sta_priv->max_agg_bufsize;
626
627 IWL_DEBUG_HT(priv, "Tx aggregation enabled on ra = %pM tid = %d\n",
628 sta->addr, tid);
629
630 return iwl_send_lq_cmd(priv, ctx,
631 &sta_priv->lq_sta.lq, CMD_ASYNC, false);
632 }
633
634 static void iwlagn_check_ratid_empty(struct iwl_priv *priv, int sta_id, u8 tid)
635 {
636 struct iwl_tid_data *tid_data = &priv->tid_data[sta_id][tid];
637 enum iwl_rxon_context_id ctx;
638 struct ieee80211_vif *vif;
639 u8 *addr;
640
641 lockdep_assert_held(&priv->shrd->sta_lock);
642
643 addr = priv->stations[sta_id].sta.sta.addr;
644 ctx = priv->stations[sta_id].ctxid;
645 vif = priv->contexts[ctx].vif;
646
647 switch (priv->tid_data[sta_id][tid].agg.state) {
648 case IWL_EMPTYING_HW_QUEUE_DELBA:
649 /* There are no packets for this RA / TID in the HW any more */
650 if (tid_data->agg.ssn == tid_data->next_reclaimed) {
651 IWL_DEBUG_TX_QUEUES(priv,
652 "Can continue DELBA flow ssn = next_recl ="
653 " %d", tid_data->next_reclaimed);
654 iwl_trans_tx_agg_disable(trans(priv), sta_id, tid);
655 tid_data->agg.state = IWL_AGG_OFF;
656 ieee80211_stop_tx_ba_cb_irqsafe(vif, addr, tid);
657 }
658 break;
659 case IWL_EMPTYING_HW_QUEUE_ADDBA:
660 /* There are no packets for this RA / TID in the HW any more */
661 if (tid_data->agg.ssn == tid_data->next_reclaimed) {
662 IWL_DEBUG_TX_QUEUES(priv,
663 "Can continue ADDBA flow ssn = next_recl ="
664 " %d", tid_data->next_reclaimed);
665 tid_data->agg.state = IWL_AGG_ON;
666 ieee80211_start_tx_ba_cb_irqsafe(vif, addr, tid);
667 }
668 break;
669 default:
670 break;
671 }
672 }
673
674 static void iwlagn_non_agg_tx_status(struct iwl_priv *priv,
675 struct iwl_rxon_context *ctx,
676 const u8 *addr1)
677 {
678 struct ieee80211_sta *sta;
679 struct iwl_station_priv *sta_priv;
680
681 rcu_read_lock();
682 sta = ieee80211_find_sta(ctx->vif, addr1);
683 if (sta) {
684 sta_priv = (void *)sta->drv_priv;
685 /* avoid atomic ops if this isn't a client */
686 if (sta_priv->client &&
687 atomic_dec_return(&sta_priv->pending_frames) == 0)
688 ieee80211_sta_block_awake(priv->hw, sta, false);
689 }
690 rcu_read_unlock();
691 }
692
693 /**
694 * translate ucode response to mac80211 tx status control values
695 */
696 static void iwlagn_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
697 struct ieee80211_tx_info *info)
698 {
699 struct ieee80211_tx_rate *r = &info->control.rates[0];
700
701 info->antenna_sel_tx =
702 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
703 if (rate_n_flags & RATE_MCS_HT_MSK)
704 r->flags |= IEEE80211_TX_RC_MCS;
705 if (rate_n_flags & RATE_MCS_GF_MSK)
706 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
707 if (rate_n_flags & RATE_MCS_HT40_MSK)
708 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
709 if (rate_n_flags & RATE_MCS_DUP_MSK)
710 r->flags |= IEEE80211_TX_RC_DUP_DATA;
711 if (rate_n_flags & RATE_MCS_SGI_MSK)
712 r->flags |= IEEE80211_TX_RC_SHORT_GI;
713 r->idx = iwlagn_hwrate_to_mac80211_idx(rate_n_flags, info->band);
714 }
715
716 #ifdef CONFIG_IWLWIFI_DEBUG
717 const char *iwl_get_tx_fail_reason(u32 status)
718 {
719 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
720 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
721
722 switch (status & TX_STATUS_MSK) {
723 case TX_STATUS_SUCCESS:
724 return "SUCCESS";
725 TX_STATUS_POSTPONE(DELAY);
726 TX_STATUS_POSTPONE(FEW_BYTES);
727 TX_STATUS_POSTPONE(BT_PRIO);
728 TX_STATUS_POSTPONE(QUIET_PERIOD);
729 TX_STATUS_POSTPONE(CALC_TTAK);
730 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
731 TX_STATUS_FAIL(SHORT_LIMIT);
732 TX_STATUS_FAIL(LONG_LIMIT);
733 TX_STATUS_FAIL(FIFO_UNDERRUN);
734 TX_STATUS_FAIL(DRAIN_FLOW);
735 TX_STATUS_FAIL(RFKILL_FLUSH);
736 TX_STATUS_FAIL(LIFE_EXPIRE);
737 TX_STATUS_FAIL(DEST_PS);
738 TX_STATUS_FAIL(HOST_ABORTED);
739 TX_STATUS_FAIL(BT_RETRY);
740 TX_STATUS_FAIL(STA_INVALID);
741 TX_STATUS_FAIL(FRAG_DROPPED);
742 TX_STATUS_FAIL(TID_DISABLE);
743 TX_STATUS_FAIL(FIFO_FLUSHED);
744 TX_STATUS_FAIL(INSUFFICIENT_CF_POLL);
745 TX_STATUS_FAIL(PASSIVE_NO_RX);
746 TX_STATUS_FAIL(NO_BEACON_ON_RADAR);
747 }
748
749 return "UNKNOWN";
750
751 #undef TX_STATUS_FAIL
752 #undef TX_STATUS_POSTPONE
753 }
754 #endif /* CONFIG_IWLWIFI_DEBUG */
755
756 static void iwlagn_count_agg_tx_err_status(struct iwl_priv *priv, u16 status)
757 {
758 status &= AGG_TX_STATUS_MSK;
759
760 switch (status) {
761 case AGG_TX_STATE_UNDERRUN_MSK:
762 priv->reply_agg_tx_stats.underrun++;
763 break;
764 case AGG_TX_STATE_BT_PRIO_MSK:
765 priv->reply_agg_tx_stats.bt_prio++;
766 break;
767 case AGG_TX_STATE_FEW_BYTES_MSK:
768 priv->reply_agg_tx_stats.few_bytes++;
769 break;
770 case AGG_TX_STATE_ABORT_MSK:
771 priv->reply_agg_tx_stats.abort++;
772 break;
773 case AGG_TX_STATE_LAST_SENT_TTL_MSK:
774 priv->reply_agg_tx_stats.last_sent_ttl++;
775 break;
776 case AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK:
777 priv->reply_agg_tx_stats.last_sent_try++;
778 break;
779 case AGG_TX_STATE_LAST_SENT_BT_KILL_MSK:
780 priv->reply_agg_tx_stats.last_sent_bt_kill++;
781 break;
782 case AGG_TX_STATE_SCD_QUERY_MSK:
783 priv->reply_agg_tx_stats.scd_query++;
784 break;
785 case AGG_TX_STATE_TEST_BAD_CRC32_MSK:
786 priv->reply_agg_tx_stats.bad_crc32++;
787 break;
788 case AGG_TX_STATE_RESPONSE_MSK:
789 priv->reply_agg_tx_stats.response++;
790 break;
791 case AGG_TX_STATE_DUMP_TX_MSK:
792 priv->reply_agg_tx_stats.dump_tx++;
793 break;
794 case AGG_TX_STATE_DELAY_TX_MSK:
795 priv->reply_agg_tx_stats.delay_tx++;
796 break;
797 default:
798 priv->reply_agg_tx_stats.unknown++;
799 break;
800 }
801 }
802
803 static void iwl_rx_reply_tx_agg(struct iwl_priv *priv,
804 struct iwlagn_tx_resp *tx_resp)
805 {
806 struct agg_tx_status *frame_status = &tx_resp->status;
807 int tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
808 IWLAGN_TX_RES_TID_POS;
809 int sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
810 IWLAGN_TX_RES_RA_POS;
811 struct iwl_ht_agg *agg = &priv->tid_data[sta_id][tid].agg;
812 u32 status = le16_to_cpu(tx_resp->status.status);
813 int i;
814
815 WARN_ON(tid == IWL_TID_NON_QOS);
816
817 if (agg->wait_for_ba)
818 IWL_DEBUG_TX_REPLY(priv,
819 "got tx response w/o block-ack\n");
820
821 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
822 agg->wait_for_ba = (tx_resp->frame_count > 1);
823
824 /*
825 * If the BT kill count is non-zero, we'll get this
826 * notification again.
827 */
828 if (tx_resp->bt_kill_count && tx_resp->frame_count == 1 &&
829 cfg(priv)->bt_params &&
830 cfg(priv)->bt_params->advanced_bt_coexist) {
831 IWL_DEBUG_COEX(priv, "receive reply tx w/ bt_kill\n");
832 }
833
834 if (tx_resp->frame_count == 1)
835 return;
836
837 /* Construct bit-map of pending frames within Tx window */
838 for (i = 0; i < tx_resp->frame_count; i++) {
839 u16 fstatus = le16_to_cpu(frame_status[i].status);
840
841 if (status & AGG_TX_STATUS_MSK)
842 iwlagn_count_agg_tx_err_status(priv, fstatus);
843
844 if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
845 AGG_TX_STATE_ABORT_MSK))
846 continue;
847
848 IWL_DEBUG_TX_REPLY(priv, "status %s (0x%08x), "
849 "try-count (0x%08x)\n",
850 iwl_get_agg_tx_fail_reason(fstatus),
851 fstatus & AGG_TX_STATUS_MSK,
852 fstatus & AGG_TX_TRY_MSK);
853 }
854 }
855
856 #ifdef CONFIG_IWLWIFI_DEBUG
857 #define AGG_TX_STATE_FAIL(x) case AGG_TX_STATE_ ## x: return #x
858
859 const char *iwl_get_agg_tx_fail_reason(u16 status)
860 {
861 status &= AGG_TX_STATUS_MSK;
862 switch (status) {
863 case AGG_TX_STATE_TRANSMITTED:
864 return "SUCCESS";
865 AGG_TX_STATE_FAIL(UNDERRUN_MSK);
866 AGG_TX_STATE_FAIL(BT_PRIO_MSK);
867 AGG_TX_STATE_FAIL(FEW_BYTES_MSK);
868 AGG_TX_STATE_FAIL(ABORT_MSK);
869 AGG_TX_STATE_FAIL(LAST_SENT_TTL_MSK);
870 AGG_TX_STATE_FAIL(LAST_SENT_TRY_CNT_MSK);
871 AGG_TX_STATE_FAIL(LAST_SENT_BT_KILL_MSK);
872 AGG_TX_STATE_FAIL(SCD_QUERY_MSK);
873 AGG_TX_STATE_FAIL(TEST_BAD_CRC32_MSK);
874 AGG_TX_STATE_FAIL(RESPONSE_MSK);
875 AGG_TX_STATE_FAIL(DUMP_TX_MSK);
876 AGG_TX_STATE_FAIL(DELAY_TX_MSK);
877 }
878
879 return "UNKNOWN";
880 }
881 #endif /* CONFIG_IWLWIFI_DEBUG */
882
883 static inline u32 iwlagn_get_scd_ssn(struct iwlagn_tx_resp *tx_resp)
884 {
885 return le32_to_cpup((__le32 *)&tx_resp->status +
886 tx_resp->frame_count) & MAX_SN;
887 }
888
889 static void iwlagn_count_tx_err_status(struct iwl_priv *priv, u16 status)
890 {
891 status &= TX_STATUS_MSK;
892
893 switch (status) {
894 case TX_STATUS_POSTPONE_DELAY:
895 priv->reply_tx_stats.pp_delay++;
896 break;
897 case TX_STATUS_POSTPONE_FEW_BYTES:
898 priv->reply_tx_stats.pp_few_bytes++;
899 break;
900 case TX_STATUS_POSTPONE_BT_PRIO:
901 priv->reply_tx_stats.pp_bt_prio++;
902 break;
903 case TX_STATUS_POSTPONE_QUIET_PERIOD:
904 priv->reply_tx_stats.pp_quiet_period++;
905 break;
906 case TX_STATUS_POSTPONE_CALC_TTAK:
907 priv->reply_tx_stats.pp_calc_ttak++;
908 break;
909 case TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY:
910 priv->reply_tx_stats.int_crossed_retry++;
911 break;
912 case TX_STATUS_FAIL_SHORT_LIMIT:
913 priv->reply_tx_stats.short_limit++;
914 break;
915 case TX_STATUS_FAIL_LONG_LIMIT:
916 priv->reply_tx_stats.long_limit++;
917 break;
918 case TX_STATUS_FAIL_FIFO_UNDERRUN:
919 priv->reply_tx_stats.fifo_underrun++;
920 break;
921 case TX_STATUS_FAIL_DRAIN_FLOW:
922 priv->reply_tx_stats.drain_flow++;
923 break;
924 case TX_STATUS_FAIL_RFKILL_FLUSH:
925 priv->reply_tx_stats.rfkill_flush++;
926 break;
927 case TX_STATUS_FAIL_LIFE_EXPIRE:
928 priv->reply_tx_stats.life_expire++;
929 break;
930 case TX_STATUS_FAIL_DEST_PS:
931 priv->reply_tx_stats.dest_ps++;
932 break;
933 case TX_STATUS_FAIL_HOST_ABORTED:
934 priv->reply_tx_stats.host_abort++;
935 break;
936 case TX_STATUS_FAIL_BT_RETRY:
937 priv->reply_tx_stats.bt_retry++;
938 break;
939 case TX_STATUS_FAIL_STA_INVALID:
940 priv->reply_tx_stats.sta_invalid++;
941 break;
942 case TX_STATUS_FAIL_FRAG_DROPPED:
943 priv->reply_tx_stats.frag_drop++;
944 break;
945 case TX_STATUS_FAIL_TID_DISABLE:
946 priv->reply_tx_stats.tid_disable++;
947 break;
948 case TX_STATUS_FAIL_FIFO_FLUSHED:
949 priv->reply_tx_stats.fifo_flush++;
950 break;
951 case TX_STATUS_FAIL_INSUFFICIENT_CF_POLL:
952 priv->reply_tx_stats.insuff_cf_poll++;
953 break;
954 case TX_STATUS_FAIL_PASSIVE_NO_RX:
955 priv->reply_tx_stats.fail_hw_drop++;
956 break;
957 case TX_STATUS_FAIL_NO_BEACON_ON_RADAR:
958 priv->reply_tx_stats.sta_color_mismatch++;
959 break;
960 default:
961 priv->reply_tx_stats.unknown++;
962 break;
963 }
964 }
965
966 static void iwlagn_set_tx_status(struct iwl_priv *priv,
967 struct ieee80211_tx_info *info,
968 struct iwlagn_tx_resp *tx_resp,
969 bool is_agg)
970 {
971 u16 status = le16_to_cpu(tx_resp->status.status);
972
973 info->status.rates[0].count = tx_resp->failure_frame + 1;
974 if (is_agg)
975 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
976 info->flags |= iwl_tx_status_to_mac80211(status);
977 iwlagn_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
978 info);
979 if (!iwl_is_tx_success(status))
980 iwlagn_count_tx_err_status(priv, status);
981 }
982
983 static void iwl_check_abort_status(struct iwl_priv *priv,
984 u8 frame_count, u32 status)
985 {
986 if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) {
987 IWL_ERR(priv, "Tx flush command to flush out all frames\n");
988 if (!test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
989 queue_work(priv->workqueue, &priv->tx_flush);
990 }
991 }
992
993 int iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb,
994 struct iwl_device_cmd *cmd)
995 {
996 struct iwl_rx_packet *pkt = rxb_addr(rxb);
997 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
998 int txq_id = SEQ_TO_QUEUE(sequence);
999 int cmd_index __maybe_unused = SEQ_TO_INDEX(sequence);
1000 struct iwlagn_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
1001 struct ieee80211_hdr *hdr;
1002 u32 status = le16_to_cpu(tx_resp->status.status);
1003 u16 ssn = iwlagn_get_scd_ssn(tx_resp);
1004 int tid;
1005 int sta_id;
1006 int freed;
1007 struct ieee80211_tx_info *info;
1008 unsigned long flags;
1009 struct sk_buff_head skbs;
1010 struct sk_buff *skb;
1011 struct iwl_rxon_context *ctx;
1012 bool is_agg = (txq_id >= IWLAGN_FIRST_AMPDU_QUEUE);
1013
1014 tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
1015 IWLAGN_TX_RES_TID_POS;
1016 sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
1017 IWLAGN_TX_RES_RA_POS;
1018
1019 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1020
1021 if (is_agg)
1022 iwl_rx_reply_tx_agg(priv, tx_resp);
1023
1024 if (tx_resp->frame_count == 1) {
1025 u16 next_reclaimed = le16_to_cpu(tx_resp->seq_ctl);
1026 next_reclaimed = SEQ_TO_SN(next_reclaimed + 0x10);
1027
1028 if (is_agg) {
1029 /* If this is an aggregation queue, we can rely on the
1030 * ssn since the wifi sequence number corresponds to
1031 * the index in the TFD ring (%256).
1032 * The seq_ctl is the sequence control of the packet
1033 * to which this Tx response relates. But if there is a
1034 * hole in the bitmap of the BA we received, this Tx
1035 * response may allow to reclaim the hole and all the
1036 * subsequent packets that were already acked.
1037 * In that case, seq_ctl != ssn, and the next packet
1038 * to be reclaimed will be ssn and not seq_ctl.
1039 */
1040 next_reclaimed = ssn;
1041 }
1042
1043 __skb_queue_head_init(&skbs);
1044
1045 if (tid != IWL_TID_NON_QOS) {
1046 priv->tid_data[sta_id][tid].next_reclaimed =
1047 next_reclaimed;
1048 IWL_DEBUG_TX_REPLY(priv, "Next reclaimed packet:%d",
1049 next_reclaimed);
1050 }
1051
1052 /*we can free until ssn % q.n_bd not inclusive */
1053 WARN_ON(iwl_trans_reclaim(trans(priv), sta_id, tid, txq_id,
1054 ssn, status, &skbs));
1055 iwlagn_check_ratid_empty(priv, sta_id, tid);
1056 freed = 0;
1057 while (!skb_queue_empty(&skbs)) {
1058 skb = __skb_dequeue(&skbs);
1059 hdr = (struct ieee80211_hdr *)skb->data;
1060
1061 if (!ieee80211_is_data_qos(hdr->frame_control))
1062 priv->last_seq_ctl = tx_resp->seq_ctl;
1063
1064 info = IEEE80211_SKB_CB(skb);
1065 ctx = info->driver_data[0];
1066 kmem_cache_free(priv->tx_cmd_pool,
1067 (info->driver_data[1]));
1068
1069 memset(&info->status, 0, sizeof(info->status));
1070
1071 if (status == TX_STATUS_FAIL_PASSIVE_NO_RX &&
1072 iwl_is_associated_ctx(ctx) && ctx->vif &&
1073 ctx->vif->type == NL80211_IFTYPE_STATION) {
1074 ctx->last_tx_rejected = true;
1075 iwl_trans_stop_queue(trans(priv), txq_id,
1076 "Tx on passive channel");
1077
1078 IWL_DEBUG_TX_REPLY(priv,
1079 "TXQ %d status %s (0x%08x) "
1080 "rate_n_flags 0x%x retries %d\n",
1081 txq_id,
1082 iwl_get_tx_fail_reason(status),
1083 status,
1084 le32_to_cpu(tx_resp->rate_n_flags),
1085 tx_resp->failure_frame);
1086
1087 IWL_DEBUG_TX_REPLY(priv,
1088 "FrameCnt = %d, idx=%d\n",
1089 tx_resp->frame_count, cmd_index);
1090 }
1091
1092 /* check if BAR is needed */
1093 if (is_agg && !iwl_is_tx_success(status))
1094 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1095 iwlagn_set_tx_status(priv, IEEE80211_SKB_CB(skb),
1096 tx_resp, is_agg);
1097 if (!is_agg)
1098 iwlagn_non_agg_tx_status(priv, ctx, hdr->addr1);
1099
1100 ieee80211_tx_status_irqsafe(priv->hw, skb);
1101
1102 freed++;
1103 }
1104
1105 WARN_ON(!is_agg && freed != 1);
1106 }
1107
1108 iwl_check_abort_status(priv, tx_resp->frame_count, status);
1109 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1110 return 0;
1111 }
1112
1113 /**
1114 * iwlagn_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
1115 *
1116 * Handles block-acknowledge notification from device, which reports success
1117 * of frames sent via aggregation.
1118 */
1119 int iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv,
1120 struct iwl_rx_mem_buffer *rxb,
1121 struct iwl_device_cmd *cmd)
1122 {
1123 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1124 struct iwl_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba;
1125 struct iwl_ht_agg *agg;
1126 struct sk_buff_head reclaimed_skbs;
1127 struct ieee80211_tx_info *info;
1128 struct ieee80211_hdr *hdr;
1129 struct sk_buff *skb;
1130 unsigned long flags;
1131 int sta_id;
1132 int tid;
1133 int freed;
1134
1135 /* "flow" corresponds to Tx queue */
1136 u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
1137
1138 /* "ssn" is start of block-ack Tx window, corresponds to index
1139 * (in Tx queue's circular buffer) of first TFD/frame in window */
1140 u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
1141
1142 if (scd_flow >= hw_params(priv).max_txq_num) {
1143 IWL_ERR(priv,
1144 "BUG_ON scd_flow is bigger than number of queues\n");
1145 return 0;
1146 }
1147
1148 sta_id = ba_resp->sta_id;
1149 tid = ba_resp->tid;
1150 agg = &priv->tid_data[sta_id][tid].agg;
1151
1152 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1153
1154 if (unlikely(!agg->wait_for_ba)) {
1155 if (unlikely(ba_resp->bitmap))
1156 IWL_ERR(priv, "Received BA when not expected\n");
1157 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1158 return 0;
1159 }
1160
1161 __skb_queue_head_init(&reclaimed_skbs);
1162
1163 /* Release all TFDs before the SSN, i.e. all TFDs in front of
1164 * block-ack window (we assume that they've been successfully
1165 * transmitted ... if not, it's too late anyway). */
1166 if (iwl_trans_reclaim(trans(priv), sta_id, tid, scd_flow,
1167 ba_resp_scd_ssn, 0, &reclaimed_skbs)) {
1168 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1169 return 0;
1170 }
1171
1172 IWL_DEBUG_TX_REPLY(priv, "REPLY_COMPRESSED_BA [%d] Received from %pM, "
1173 "sta_id = %d\n",
1174 agg->wait_for_ba,
1175 (u8 *) &ba_resp->sta_addr_lo32,
1176 ba_resp->sta_id);
1177 IWL_DEBUG_TX_REPLY(priv, "TID = %d, SeqCtl = %d, bitmap = 0x%llx, "
1178 "scd_flow = %d, scd_ssn = %d\n",
1179 ba_resp->tid, le16_to_cpu(ba_resp->seq_ctl),
1180 (unsigned long long)le64_to_cpu(ba_resp->bitmap),
1181 scd_flow, ba_resp_scd_ssn);
1182
1183 /* Mark that the expected block-ack response arrived */
1184 agg->wait_for_ba = false;
1185
1186 /* Sanity check values reported by uCode */
1187 if (ba_resp->txed_2_done > ba_resp->txed) {
1188 IWL_DEBUG_TX_REPLY(priv,
1189 "bogus sent(%d) and ack(%d) count\n",
1190 ba_resp->txed, ba_resp->txed_2_done);
1191 /*
1192 * set txed_2_done = txed,
1193 * so it won't impact rate scale
1194 */
1195 ba_resp->txed = ba_resp->txed_2_done;
1196 }
1197 IWL_DEBUG_HT(priv, "agg frames sent:%d, acked:%d\n",
1198 ba_resp->txed, ba_resp->txed_2_done);
1199
1200 priv->tid_data[sta_id][tid].next_reclaimed = ba_resp_scd_ssn;
1201
1202 iwlagn_check_ratid_empty(priv, sta_id, tid);
1203 freed = 0;
1204 while (!skb_queue_empty(&reclaimed_skbs)) {
1205
1206 skb = __skb_dequeue(&reclaimed_skbs);
1207 hdr = (struct ieee80211_hdr *)skb->data;
1208
1209 if (ieee80211_is_data_qos(hdr->frame_control))
1210 freed++;
1211 else
1212 WARN_ON_ONCE(1);
1213
1214 info = IEEE80211_SKB_CB(skb);
1215 kmem_cache_free(priv->tx_cmd_pool, (info->driver_data[1]));
1216
1217 if (freed == 1) {
1218 /* this is the first skb we deliver in this batch */
1219 /* put the rate scaling data there */
1220 info = IEEE80211_SKB_CB(skb);
1221 memset(&info->status, 0, sizeof(info->status));
1222 info->flags |= IEEE80211_TX_STAT_ACK;
1223 info->flags |= IEEE80211_TX_STAT_AMPDU;
1224 info->status.ampdu_ack_len = ba_resp->txed_2_done;
1225 info->status.ampdu_len = ba_resp->txed;
1226 iwlagn_hwrate_to_tx_control(priv, agg->rate_n_flags,
1227 info);
1228 }
1229
1230 ieee80211_tx_status_irqsafe(priv->hw, skb);
1231 }
1232
1233 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1234 return 0;
1235 }
Linux kernel - Deliverables
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