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[mirror_ubuntu-artful-kernel.git] / drivers / net / wireless / intel / iwlwifi / dvm / tx.c
1 /******************************************************************************
2 *
3 * GPL LICENSE SUMMARY
4 *
5 * Copyright(c) 2008 - 2014 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 COPYING.
23 *
24 * Contact Information:
25 * Intel Linux Wireless <linuxwifi@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/sched.h>
33 #include <linux/ieee80211.h>
34 #include "iwl-io.h"
35 #include "iwl-trans.h"
36 #include "iwl-agn-hw.h"
37 #include "dev.h"
38 #include "agn.h"
39
40 static const u8 tid_to_ac[] = {
41 IEEE80211_AC_BE,
42 IEEE80211_AC_BK,
43 IEEE80211_AC_BK,
44 IEEE80211_AC_BE,
45 IEEE80211_AC_VI,
46 IEEE80211_AC_VI,
47 IEEE80211_AC_VO,
48 IEEE80211_AC_VO,
49 };
50
51 static void iwlagn_tx_cmd_protection(struct iwl_priv *priv,
52 struct ieee80211_tx_info *info,
53 __le16 fc, __le32 *tx_flags)
54 {
55 if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS ||
56 info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT ||
57 info->flags & IEEE80211_TX_CTL_AMPDU)
58 *tx_flags |= TX_CMD_FLG_PROT_REQUIRE_MSK;
59 }
60
61 /*
62 * handle build REPLY_TX command notification.
63 */
64 static void iwlagn_tx_cmd_build_basic(struct iwl_priv *priv,
65 struct sk_buff *skb,
66 struct iwl_tx_cmd *tx_cmd,
67 struct ieee80211_tx_info *info,
68 struct ieee80211_hdr *hdr, u8 sta_id)
69 {
70 __le16 fc = hdr->frame_control;
71 __le32 tx_flags = tx_cmd->tx_flags;
72
73 tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
74
75 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
76 tx_flags |= TX_CMD_FLG_ACK_MSK;
77 else
78 tx_flags &= ~TX_CMD_FLG_ACK_MSK;
79
80 if (ieee80211_is_probe_resp(fc))
81 tx_flags |= TX_CMD_FLG_TSF_MSK;
82 else if (ieee80211_is_back_req(fc))
83 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK;
84 else if (info->band == NL80211_BAND_2GHZ &&
85 priv->lib->bt_params &&
86 priv->lib->bt_params->advanced_bt_coexist &&
87 (ieee80211_is_auth(fc) || ieee80211_is_assoc_req(fc) ||
88 ieee80211_is_reassoc_req(fc) ||
89 info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO))
90 tx_flags |= TX_CMD_FLG_IGNORE_BT;
91
92
93 tx_cmd->sta_id = sta_id;
94 if (ieee80211_has_morefrags(fc))
95 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
96
97 if (ieee80211_is_data_qos(fc)) {
98 u8 *qc = ieee80211_get_qos_ctl(hdr);
99 tx_cmd->tid_tspec = qc[0] & 0xf;
100 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
101 } else {
102 tx_cmd->tid_tspec = IWL_TID_NON_QOS;
103 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
104 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
105 else
106 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
107 }
108
109 iwlagn_tx_cmd_protection(priv, info, fc, &tx_flags);
110
111 tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
112 if (ieee80211_is_mgmt(fc)) {
113 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
114 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
115 else
116 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
117 } else {
118 tx_cmd->timeout.pm_frame_timeout = 0;
119 }
120
121 tx_cmd->driver_txop = 0;
122 tx_cmd->tx_flags = tx_flags;
123 tx_cmd->next_frame_len = 0;
124 }
125
126 static void iwlagn_tx_cmd_build_rate(struct iwl_priv *priv,
127 struct iwl_tx_cmd *tx_cmd,
128 struct ieee80211_tx_info *info,
129 struct ieee80211_sta *sta,
130 __le16 fc)
131 {
132 u32 rate_flags;
133 int rate_idx;
134 u8 rts_retry_limit;
135 u8 data_retry_limit;
136 u8 rate_plcp;
137
138 if (priv->wowlan) {
139 rts_retry_limit = IWLAGN_LOW_RETRY_LIMIT;
140 data_retry_limit = IWLAGN_LOW_RETRY_LIMIT;
141 } else {
142 /* Set retry limit on RTS packets */
143 rts_retry_limit = IWLAGN_RTS_DFAULT_RETRY_LIMIT;
144
145 /* Set retry limit on DATA packets and Probe Responses*/
146 if (ieee80211_is_probe_resp(fc)) {
147 data_retry_limit = IWLAGN_MGMT_DFAULT_RETRY_LIMIT;
148 rts_retry_limit =
149 min(data_retry_limit, rts_retry_limit);
150 } else if (ieee80211_is_back_req(fc))
151 data_retry_limit = IWLAGN_BAR_DFAULT_RETRY_LIMIT;
152 else
153 data_retry_limit = IWLAGN_DEFAULT_TX_RETRY;
154 }
155
156 tx_cmd->data_retry_limit = data_retry_limit;
157 tx_cmd->rts_retry_limit = rts_retry_limit;
158
159 /* DATA packets will use the uCode station table for rate/antenna
160 * selection */
161 if (ieee80211_is_data(fc)) {
162 tx_cmd->initial_rate_index = 0;
163 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
164 return;
165 } else if (ieee80211_is_back_req(fc))
166 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
167
168 /**
169 * If the current TX rate stored in mac80211 has the MCS bit set, it's
170 * not really a TX rate. Thus, we use the lowest supported rate for
171 * this band. Also use the lowest supported rate if the stored rate
172 * index is invalid.
173 */
174 rate_idx = info->control.rates[0].idx;
175 if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS ||
176 (rate_idx < 0) || (rate_idx > IWL_RATE_COUNT_LEGACY))
177 rate_idx = rate_lowest_index(
178 &priv->nvm_data->bands[info->band], sta);
179 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
180 if (info->band == NL80211_BAND_5GHZ)
181 rate_idx += IWL_FIRST_OFDM_RATE;
182 /* Get PLCP rate for tx_cmd->rate_n_flags */
183 rate_plcp = iwl_rates[rate_idx].plcp;
184 /* Zero out flags for this packet */
185 rate_flags = 0;
186
187 /* Set CCK flag as needed */
188 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
189 rate_flags |= RATE_MCS_CCK_MSK;
190
191 /* Set up antennas */
192 if (priv->lib->bt_params &&
193 priv->lib->bt_params->advanced_bt_coexist &&
194 priv->bt_full_concurrent) {
195 /* operated as 1x1 in full concurrency mode */
196 priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
197 first_antenna(priv->nvm_data->valid_tx_ant));
198 } else
199 priv->mgmt_tx_ant = iwl_toggle_tx_ant(
200 priv, priv->mgmt_tx_ant,
201 priv->nvm_data->valid_tx_ant);
202 rate_flags |= iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
203
204 /* Set the rate in the TX cmd */
205 tx_cmd->rate_n_flags = iwl_hw_set_rate_n_flags(rate_plcp, rate_flags);
206 }
207
208 static void iwlagn_tx_cmd_build_hwcrypto(struct iwl_priv *priv,
209 struct ieee80211_tx_info *info,
210 struct iwl_tx_cmd *tx_cmd,
211 struct sk_buff *skb_frag)
212 {
213 struct ieee80211_key_conf *keyconf = info->control.hw_key;
214
215 switch (keyconf->cipher) {
216 case WLAN_CIPHER_SUITE_CCMP:
217 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
218 memcpy(tx_cmd->key, keyconf->key, keyconf->keylen);
219 if (info->flags & IEEE80211_TX_CTL_AMPDU)
220 tx_cmd->tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
221 break;
222
223 case WLAN_CIPHER_SUITE_TKIP:
224 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
225 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
226 break;
227
228 case WLAN_CIPHER_SUITE_WEP104:
229 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
230 /* fall through */
231 case WLAN_CIPHER_SUITE_WEP40:
232 tx_cmd->sec_ctl |= (TX_CMD_SEC_WEP |
233 (keyconf->keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT);
234
235 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
236
237 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
238 "with key %d\n", keyconf->keyidx);
239 break;
240
241 default:
242 IWL_ERR(priv, "Unknown encode cipher %x\n", keyconf->cipher);
243 break;
244 }
245 }
246
247 /**
248 * iwl_sta_id_or_broadcast - return sta_id or broadcast sta
249 * @context: the current context
250 * @sta: mac80211 station
251 *
252 * In certain circumstances mac80211 passes a station pointer
253 * that may be %NULL, for example during TX or key setup. In
254 * that case, we need to use the broadcast station, so this
255 * inline wraps that pattern.
256 */
257 static int iwl_sta_id_or_broadcast(struct iwl_rxon_context *context,
258 struct ieee80211_sta *sta)
259 {
260 int sta_id;
261
262 if (!sta)
263 return context->bcast_sta_id;
264
265 sta_id = iwl_sta_id(sta);
266
267 /*
268 * mac80211 should not be passing a partially
269 * initialised station!
270 */
271 WARN_ON(sta_id == IWL_INVALID_STATION);
272
273 return sta_id;
274 }
275
276 /*
277 * start REPLY_TX command process
278 */
279 int iwlagn_tx_skb(struct iwl_priv *priv,
280 struct ieee80211_sta *sta,
281 struct sk_buff *skb)
282 {
283 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
284 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
285 struct iwl_station_priv *sta_priv = NULL;
286 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
287 struct iwl_device_cmd *dev_cmd;
288 struct iwl_tx_cmd *tx_cmd;
289 __le16 fc;
290 u8 hdr_len;
291 u16 len, seq_number = 0;
292 u8 sta_id, tid = IWL_MAX_TID_COUNT;
293 bool is_agg = false, is_data_qos = false;
294 int txq_id;
295
296 if (info->control.vif)
297 ctx = iwl_rxon_ctx_from_vif(info->control.vif);
298
299 if (iwl_is_rfkill(priv)) {
300 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
301 goto drop_unlock_priv;
302 }
303
304 fc = hdr->frame_control;
305
306 #ifdef CONFIG_IWLWIFI_DEBUG
307 if (ieee80211_is_auth(fc))
308 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
309 else if (ieee80211_is_assoc_req(fc))
310 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
311 else if (ieee80211_is_reassoc_req(fc))
312 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
313 #endif
314
315 if (unlikely(ieee80211_is_probe_resp(fc))) {
316 struct iwl_wipan_noa_data *noa_data =
317 rcu_dereference(priv->noa_data);
318
319 if (noa_data &&
320 pskb_expand_head(skb, 0, noa_data->length,
321 GFP_ATOMIC) == 0) {
322 skb_put_data(skb, noa_data->data, noa_data->length);
323 hdr = (struct ieee80211_hdr *)skb->data;
324 }
325 }
326
327 hdr_len = ieee80211_hdrlen(fc);
328
329 /* For management frames use broadcast id to do not break aggregation */
330 if (!ieee80211_is_data(fc))
331 sta_id = ctx->bcast_sta_id;
332 else {
333 /* Find index into station table for destination station */
334 sta_id = iwl_sta_id_or_broadcast(ctx, sta);
335 if (sta_id == IWL_INVALID_STATION) {
336 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
337 hdr->addr1);
338 goto drop_unlock_priv;
339 }
340 }
341
342 if (sta)
343 sta_priv = (void *)sta->drv_priv;
344
345 if (sta_priv && sta_priv->asleep &&
346 (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER)) {
347 /*
348 * This sends an asynchronous command to the device,
349 * but we can rely on it being processed before the
350 * next frame is processed -- and the next frame to
351 * this station is the one that will consume this
352 * counter.
353 * For now set the counter to just 1 since we do not
354 * support uAPSD yet.
355 *
356 * FIXME: If we get two non-bufferable frames one
357 * after the other, we might only send out one of
358 * them because this is racy.
359 */
360 iwl_sta_modify_sleep_tx_count(priv, sta_id, 1);
361 }
362
363 dev_cmd = iwl_trans_alloc_tx_cmd(priv->trans);
364
365 if (unlikely(!dev_cmd))
366 goto drop_unlock_priv;
367
368 memset(dev_cmd, 0, sizeof(*dev_cmd));
369 dev_cmd->hdr.cmd = REPLY_TX;
370 tx_cmd = (struct iwl_tx_cmd *) dev_cmd->payload;
371
372 /* Total # bytes to be transmitted */
373 len = (u16)skb->len;
374 tx_cmd->len = cpu_to_le16(len);
375
376 if (info->control.hw_key)
377 iwlagn_tx_cmd_build_hwcrypto(priv, info, tx_cmd, skb);
378
379 /* TODO need this for burst mode later on */
380 iwlagn_tx_cmd_build_basic(priv, skb, tx_cmd, info, hdr, sta_id);
381
382 iwlagn_tx_cmd_build_rate(priv, tx_cmd, info, sta, fc);
383
384 memset(&info->status, 0, sizeof(info->status));
385 memset(info->driver_data, 0, sizeof(info->driver_data));
386
387 info->driver_data[0] = ctx;
388 info->driver_data[1] = dev_cmd;
389 /* From now on, we cannot access info->control */
390
391 spin_lock(&priv->sta_lock);
392
393 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
394 u8 *qc = NULL;
395 struct iwl_tid_data *tid_data;
396 qc = ieee80211_get_qos_ctl(hdr);
397 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
398 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
399 goto drop_unlock_sta;
400 tid_data = &priv->tid_data[sta_id][tid];
401
402 /* aggregation is on for this <sta,tid> */
403 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
404 tid_data->agg.state != IWL_AGG_ON) {
405 IWL_ERR(priv,
406 "TX_CTL_AMPDU while not in AGG: Tx flags = 0x%08x, agg.state = %d\n",
407 info->flags, tid_data->agg.state);
408 IWL_ERR(priv, "sta_id = %d, tid = %d seq_num = %d\n",
409 sta_id, tid,
410 IEEE80211_SEQ_TO_SN(tid_data->seq_number));
411 goto drop_unlock_sta;
412 }
413
414 /* We can receive packets from the stack in IWL_AGG_{ON,OFF}
415 * only. Check this here.
416 */
417 if (WARN_ONCE(tid_data->agg.state != IWL_AGG_ON &&
418 tid_data->agg.state != IWL_AGG_OFF,
419 "Tx while agg.state = %d\n", tid_data->agg.state))
420 goto drop_unlock_sta;
421
422 seq_number = tid_data->seq_number;
423 seq_number &= IEEE80211_SCTL_SEQ;
424 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
425 hdr->seq_ctrl |= cpu_to_le16(seq_number);
426 seq_number += 0x10;
427
428 if (info->flags & IEEE80211_TX_CTL_AMPDU)
429 is_agg = true;
430 is_data_qos = true;
431 }
432
433 /* Copy MAC header from skb into command buffer */
434 memcpy(tx_cmd->hdr, hdr, hdr_len);
435
436 txq_id = info->hw_queue;
437
438 if (is_agg)
439 txq_id = priv->tid_data[sta_id][tid].agg.txq_id;
440 else if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) {
441 /*
442 * The microcode will clear the more data
443 * bit in the last frame it transmits.
444 */
445 hdr->frame_control |=
446 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
447 }
448
449 WARN_ON_ONCE(is_agg &&
450 priv->queue_to_mac80211[txq_id] != info->hw_queue);
451
452 IWL_DEBUG_TX(priv, "TX to [%d|%d] Q:%d - seq: 0x%x\n", sta_id, tid,
453 txq_id, seq_number);
454
455 if (iwl_trans_tx(priv->trans, skb, dev_cmd, txq_id))
456 goto drop_unlock_sta;
457
458 if (is_data_qos && !ieee80211_has_morefrags(fc))
459 priv->tid_data[sta_id][tid].seq_number = seq_number;
460
461 spin_unlock(&priv->sta_lock);
462
463 /*
464 * Avoid atomic ops if it isn't an associated client.
465 * Also, if this is a packet for aggregation, don't
466 * increase the counter because the ucode will stop
467 * aggregation queues when their respective station
468 * goes to sleep.
469 */
470 if (sta_priv && sta_priv->client && !is_agg)
471 atomic_inc(&sta_priv->pending_frames);
472
473 return 0;
474
475 drop_unlock_sta:
476 if (dev_cmd)
477 iwl_trans_free_tx_cmd(priv->trans, dev_cmd);
478 spin_unlock(&priv->sta_lock);
479 drop_unlock_priv:
480 return -1;
481 }
482
483 static int iwlagn_alloc_agg_txq(struct iwl_priv *priv, int mq)
484 {
485 int q;
486
487 for (q = IWLAGN_FIRST_AMPDU_QUEUE;
488 q < priv->cfg->base_params->num_of_queues; q++) {
489 if (!test_and_set_bit(q, priv->agg_q_alloc)) {
490 priv->queue_to_mac80211[q] = mq;
491 return q;
492 }
493 }
494
495 return -ENOSPC;
496 }
497
498 static void iwlagn_dealloc_agg_txq(struct iwl_priv *priv, int q)
499 {
500 clear_bit(q, priv->agg_q_alloc);
501 priv->queue_to_mac80211[q] = IWL_INVALID_MAC80211_QUEUE;
502 }
503
504 int iwlagn_tx_agg_stop(struct iwl_priv *priv, struct ieee80211_vif *vif,
505 struct ieee80211_sta *sta, u16 tid)
506 {
507 struct iwl_tid_data *tid_data;
508 int sta_id, txq_id;
509 enum iwl_agg_state agg_state;
510
511 sta_id = iwl_sta_id(sta);
512
513 if (sta_id == IWL_INVALID_STATION) {
514 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
515 return -ENXIO;
516 }
517
518 spin_lock_bh(&priv->sta_lock);
519
520 tid_data = &priv->tid_data[sta_id][tid];
521 txq_id = tid_data->agg.txq_id;
522
523 switch (tid_data->agg.state) {
524 case IWL_EMPTYING_HW_QUEUE_ADDBA:
525 /*
526 * This can happen if the peer stops aggregation
527 * again before we've had a chance to drain the
528 * queue we selected previously, i.e. before the
529 * session was really started completely.
530 */
531 IWL_DEBUG_HT(priv, "AGG stop before setup done\n");
532 goto turn_off;
533 case IWL_AGG_STARTING:
534 /*
535 * This can happen when the session is stopped before
536 * we receive ADDBA response
537 */
538 IWL_DEBUG_HT(priv, "AGG stop before AGG became operational\n");
539 goto turn_off;
540 case IWL_AGG_ON:
541 break;
542 default:
543 IWL_WARN(priv,
544 "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
545 sta_id, tid, tid_data->agg.state);
546 spin_unlock_bh(&priv->sta_lock);
547 return 0;
548 }
549
550 tid_data->agg.ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
551
552 /* There are still packets for this RA / TID in the HW */
553 if (!test_bit(txq_id, priv->agg_q_alloc)) {
554 IWL_DEBUG_TX_QUEUES(priv,
555 "stopping AGG on STA/TID %d/%d but hwq %d not used\n",
556 sta_id, tid, txq_id);
557 } else if (tid_data->agg.ssn != tid_data->next_reclaimed) {
558 IWL_DEBUG_TX_QUEUES(priv,
559 "Can't proceed: ssn %d, next_recl = %d\n",
560 tid_data->agg.ssn,
561 tid_data->next_reclaimed);
562 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_DELBA;
563 spin_unlock_bh(&priv->sta_lock);
564 return 0;
565 }
566
567 IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d\n",
568 tid_data->agg.ssn);
569 turn_off:
570 agg_state = tid_data->agg.state;
571 tid_data->agg.state = IWL_AGG_OFF;
572
573 spin_unlock_bh(&priv->sta_lock);
574
575 if (test_bit(txq_id, priv->agg_q_alloc)) {
576 /*
577 * If the transport didn't know that we wanted to start
578 * agreggation, don't tell it that we want to stop them.
579 * This can happen when we don't get the addBA response on
580 * time, or we hadn't time to drain the AC queues.
581 */
582 if (agg_state == IWL_AGG_ON)
583 iwl_trans_txq_disable(priv->trans, txq_id, true);
584 else
585 IWL_DEBUG_TX_QUEUES(priv, "Don't disable tx agg: %d\n",
586 agg_state);
587 iwlagn_dealloc_agg_txq(priv, txq_id);
588 }
589
590 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
591
592 return 0;
593 }
594
595 int iwlagn_tx_agg_start(struct iwl_priv *priv, struct ieee80211_vif *vif,
596 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
597 {
598 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
599 struct iwl_tid_data *tid_data;
600 int sta_id, txq_id, ret;
601
602 IWL_DEBUG_HT(priv, "TX AGG request on ra = %pM tid = %d\n",
603 sta->addr, tid);
604
605 sta_id = iwl_sta_id(sta);
606 if (sta_id == IWL_INVALID_STATION) {
607 IWL_ERR(priv, "Start AGG on invalid station\n");
608 return -ENXIO;
609 }
610 if (unlikely(tid >= IWL_MAX_TID_COUNT))
611 return -EINVAL;
612
613 if (priv->tid_data[sta_id][tid].agg.state != IWL_AGG_OFF) {
614 IWL_ERR(priv, "Start AGG when state is not IWL_AGG_OFF !\n");
615 return -ENXIO;
616 }
617
618 txq_id = iwlagn_alloc_agg_txq(priv, ctx->ac_to_queue[tid_to_ac[tid]]);
619 if (txq_id < 0) {
620 IWL_DEBUG_TX_QUEUES(priv,
621 "No free aggregation queue for %pM/%d\n",
622 sta->addr, tid);
623 return txq_id;
624 }
625
626 ret = iwl_sta_tx_modify_enable_tid(priv, sta_id, tid);
627 if (ret)
628 return ret;
629
630 spin_lock_bh(&priv->sta_lock);
631 tid_data = &priv->tid_data[sta_id][tid];
632 tid_data->agg.ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
633 tid_data->agg.txq_id = txq_id;
634
635 *ssn = tid_data->agg.ssn;
636
637 if (*ssn == tid_data->next_reclaimed) {
638 IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d\n",
639 tid_data->agg.ssn);
640 tid_data->agg.state = IWL_AGG_STARTING;
641 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
642 } else {
643 IWL_DEBUG_TX_QUEUES(priv, "Can't proceed: ssn %d, "
644 "next_reclaimed = %d\n",
645 tid_data->agg.ssn,
646 tid_data->next_reclaimed);
647 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA;
648 }
649 spin_unlock_bh(&priv->sta_lock);
650
651 return ret;
652 }
653
654 int iwlagn_tx_agg_flush(struct iwl_priv *priv, struct ieee80211_vif *vif,
655 struct ieee80211_sta *sta, u16 tid)
656 {
657 struct iwl_tid_data *tid_data;
658 enum iwl_agg_state agg_state;
659 int sta_id, txq_id;
660 sta_id = iwl_sta_id(sta);
661
662 /*
663 * First set the agg state to OFF to avoid calling
664 * ieee80211_stop_tx_ba_cb in iwlagn_check_ratid_empty.
665 */
666 spin_lock_bh(&priv->sta_lock);
667
668 tid_data = &priv->tid_data[sta_id][tid];
669 txq_id = tid_data->agg.txq_id;
670 agg_state = tid_data->agg.state;
671 IWL_DEBUG_TX_QUEUES(priv, "Flush AGG: sta %d tid %d q %d state %d\n",
672 sta_id, tid, txq_id, tid_data->agg.state);
673
674 tid_data->agg.state = IWL_AGG_OFF;
675
676 spin_unlock_bh(&priv->sta_lock);
677
678 if (iwlagn_txfifo_flush(priv, BIT(txq_id)))
679 IWL_ERR(priv, "Couldn't flush the AGG queue\n");
680
681 if (test_bit(txq_id, priv->agg_q_alloc)) {
682 /*
683 * If the transport didn't know that we wanted to start
684 * agreggation, don't tell it that we want to stop them.
685 * This can happen when we don't get the addBA response on
686 * time, or we hadn't time to drain the AC queues.
687 */
688 if (agg_state == IWL_AGG_ON)
689 iwl_trans_txq_disable(priv->trans, txq_id, true);
690 else
691 IWL_DEBUG_TX_QUEUES(priv, "Don't disable tx agg: %d\n",
692 agg_state);
693 iwlagn_dealloc_agg_txq(priv, txq_id);
694 }
695
696 return 0;
697 }
698
699 int iwlagn_tx_agg_oper(struct iwl_priv *priv, struct ieee80211_vif *vif,
700 struct ieee80211_sta *sta, u16 tid, u8 buf_size)
701 {
702 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
703 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
704 int q, fifo;
705 u16 ssn;
706
707 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
708
709 spin_lock_bh(&priv->sta_lock);
710 ssn = priv->tid_data[sta_priv->sta_id][tid].agg.ssn;
711 q = priv->tid_data[sta_priv->sta_id][tid].agg.txq_id;
712 priv->tid_data[sta_priv->sta_id][tid].agg.state = IWL_AGG_ON;
713 spin_unlock_bh(&priv->sta_lock);
714
715 fifo = ctx->ac_to_fifo[tid_to_ac[tid]];
716
717 iwl_trans_txq_enable(priv->trans, q, fifo, sta_priv->sta_id, tid,
718 buf_size, ssn, 0);
719
720 /*
721 * If the limit is 0, then it wasn't initialised yet,
722 * use the default. We can do that since we take the
723 * minimum below, and we don't want to go above our
724 * default due to hardware restrictions.
725 */
726 if (sta_priv->max_agg_bufsize == 0)
727 sta_priv->max_agg_bufsize =
728 LINK_QUAL_AGG_FRAME_LIMIT_DEF;
729
730 /*
731 * Even though in theory the peer could have different
732 * aggregation reorder buffer sizes for different sessions,
733 * our ucode doesn't allow for that and has a global limit
734 * for each station. Therefore, use the minimum of all the
735 * aggregation sessions and our default value.
736 */
737 sta_priv->max_agg_bufsize =
738 min(sta_priv->max_agg_bufsize, buf_size);
739
740 if (priv->hw_params.use_rts_for_aggregation) {
741 /*
742 * switch to RTS/CTS if it is the prefer protection
743 * method for HT traffic
744 */
745
746 sta_priv->lq_sta.lq.general_params.flags |=
747 LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
748 }
749 priv->agg_tids_count++;
750 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
751 priv->agg_tids_count);
752
753 sta_priv->lq_sta.lq.agg_params.agg_frame_cnt_limit =
754 sta_priv->max_agg_bufsize;
755
756 IWL_DEBUG_HT(priv, "Tx aggregation enabled on ra = %pM tid = %d\n",
757 sta->addr, tid);
758
759 return iwl_send_lq_cmd(priv, ctx,
760 &sta_priv->lq_sta.lq, CMD_ASYNC, false);
761 }
762
763 static void iwlagn_check_ratid_empty(struct iwl_priv *priv, int sta_id, u8 tid)
764 {
765 struct iwl_tid_data *tid_data = &priv->tid_data[sta_id][tid];
766 enum iwl_rxon_context_id ctx;
767 struct ieee80211_vif *vif;
768 u8 *addr;
769
770 lockdep_assert_held(&priv->sta_lock);
771
772 addr = priv->stations[sta_id].sta.sta.addr;
773 ctx = priv->stations[sta_id].ctxid;
774 vif = priv->contexts[ctx].vif;
775
776 switch (priv->tid_data[sta_id][tid].agg.state) {
777 case IWL_EMPTYING_HW_QUEUE_DELBA:
778 /* There are no packets for this RA / TID in the HW any more */
779 if (tid_data->agg.ssn == tid_data->next_reclaimed) {
780 IWL_DEBUG_TX_QUEUES(priv,
781 "Can continue DELBA flow ssn = next_recl = %d\n",
782 tid_data->next_reclaimed);
783 iwl_trans_txq_disable(priv->trans,
784 tid_data->agg.txq_id, true);
785 iwlagn_dealloc_agg_txq(priv, tid_data->agg.txq_id);
786 tid_data->agg.state = IWL_AGG_OFF;
787 ieee80211_stop_tx_ba_cb_irqsafe(vif, addr, tid);
788 }
789 break;
790 case IWL_EMPTYING_HW_QUEUE_ADDBA:
791 /* There are no packets for this RA / TID in the HW any more */
792 if (tid_data->agg.ssn == tid_data->next_reclaimed) {
793 IWL_DEBUG_TX_QUEUES(priv,
794 "Can continue ADDBA flow ssn = next_recl = %d\n",
795 tid_data->next_reclaimed);
796 tid_data->agg.state = IWL_AGG_STARTING;
797 ieee80211_start_tx_ba_cb_irqsafe(vif, addr, tid);
798 }
799 break;
800 default:
801 break;
802 }
803 }
804
805 static void iwlagn_non_agg_tx_status(struct iwl_priv *priv,
806 struct iwl_rxon_context *ctx,
807 const u8 *addr1)
808 {
809 struct ieee80211_sta *sta;
810 struct iwl_station_priv *sta_priv;
811
812 rcu_read_lock();
813 sta = ieee80211_find_sta(ctx->vif, addr1);
814 if (sta) {
815 sta_priv = (void *)sta->drv_priv;
816 /* avoid atomic ops if this isn't a client */
817 if (sta_priv->client &&
818 atomic_dec_return(&sta_priv->pending_frames) == 0)
819 ieee80211_sta_block_awake(priv->hw, sta, false);
820 }
821 rcu_read_unlock();
822 }
823
824 /**
825 * translate ucode response to mac80211 tx status control values
826 */
827 static void iwlagn_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
828 struct ieee80211_tx_info *info)
829 {
830 struct ieee80211_tx_rate *r = &info->status.rates[0];
831
832 info->status.antenna =
833 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
834 if (rate_n_flags & RATE_MCS_HT_MSK)
835 r->flags |= IEEE80211_TX_RC_MCS;
836 if (rate_n_flags & RATE_MCS_GF_MSK)
837 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
838 if (rate_n_flags & RATE_MCS_HT40_MSK)
839 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
840 if (rate_n_flags & RATE_MCS_DUP_MSK)
841 r->flags |= IEEE80211_TX_RC_DUP_DATA;
842 if (rate_n_flags & RATE_MCS_SGI_MSK)
843 r->flags |= IEEE80211_TX_RC_SHORT_GI;
844 r->idx = iwlagn_hwrate_to_mac80211_idx(rate_n_flags, info->band);
845 }
846
847 #ifdef CONFIG_IWLWIFI_DEBUG
848 const char *iwl_get_tx_fail_reason(u32 status)
849 {
850 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
851 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
852
853 switch (status & TX_STATUS_MSK) {
854 case TX_STATUS_SUCCESS:
855 return "SUCCESS";
856 TX_STATUS_POSTPONE(DELAY);
857 TX_STATUS_POSTPONE(FEW_BYTES);
858 TX_STATUS_POSTPONE(BT_PRIO);
859 TX_STATUS_POSTPONE(QUIET_PERIOD);
860 TX_STATUS_POSTPONE(CALC_TTAK);
861 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
862 TX_STATUS_FAIL(SHORT_LIMIT);
863 TX_STATUS_FAIL(LONG_LIMIT);
864 TX_STATUS_FAIL(FIFO_UNDERRUN);
865 TX_STATUS_FAIL(DRAIN_FLOW);
866 TX_STATUS_FAIL(RFKILL_FLUSH);
867 TX_STATUS_FAIL(LIFE_EXPIRE);
868 TX_STATUS_FAIL(DEST_PS);
869 TX_STATUS_FAIL(HOST_ABORTED);
870 TX_STATUS_FAIL(BT_RETRY);
871 TX_STATUS_FAIL(STA_INVALID);
872 TX_STATUS_FAIL(FRAG_DROPPED);
873 TX_STATUS_FAIL(TID_DISABLE);
874 TX_STATUS_FAIL(FIFO_FLUSHED);
875 TX_STATUS_FAIL(INSUFFICIENT_CF_POLL);
876 TX_STATUS_FAIL(PASSIVE_NO_RX);
877 TX_STATUS_FAIL(NO_BEACON_ON_RADAR);
878 }
879
880 return "UNKNOWN";
881
882 #undef TX_STATUS_FAIL
883 #undef TX_STATUS_POSTPONE
884 }
885 #endif /* CONFIG_IWLWIFI_DEBUG */
886
887 static void iwlagn_count_agg_tx_err_status(struct iwl_priv *priv, u16 status)
888 {
889 status &= AGG_TX_STATUS_MSK;
890
891 switch (status) {
892 case AGG_TX_STATE_UNDERRUN_MSK:
893 priv->reply_agg_tx_stats.underrun++;
894 break;
895 case AGG_TX_STATE_BT_PRIO_MSK:
896 priv->reply_agg_tx_stats.bt_prio++;
897 break;
898 case AGG_TX_STATE_FEW_BYTES_MSK:
899 priv->reply_agg_tx_stats.few_bytes++;
900 break;
901 case AGG_TX_STATE_ABORT_MSK:
902 priv->reply_agg_tx_stats.abort++;
903 break;
904 case AGG_TX_STATE_LAST_SENT_TTL_MSK:
905 priv->reply_agg_tx_stats.last_sent_ttl++;
906 break;
907 case AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK:
908 priv->reply_agg_tx_stats.last_sent_try++;
909 break;
910 case AGG_TX_STATE_LAST_SENT_BT_KILL_MSK:
911 priv->reply_agg_tx_stats.last_sent_bt_kill++;
912 break;
913 case AGG_TX_STATE_SCD_QUERY_MSK:
914 priv->reply_agg_tx_stats.scd_query++;
915 break;
916 case AGG_TX_STATE_TEST_BAD_CRC32_MSK:
917 priv->reply_agg_tx_stats.bad_crc32++;
918 break;
919 case AGG_TX_STATE_RESPONSE_MSK:
920 priv->reply_agg_tx_stats.response++;
921 break;
922 case AGG_TX_STATE_DUMP_TX_MSK:
923 priv->reply_agg_tx_stats.dump_tx++;
924 break;
925 case AGG_TX_STATE_DELAY_TX_MSK:
926 priv->reply_agg_tx_stats.delay_tx++;
927 break;
928 default:
929 priv->reply_agg_tx_stats.unknown++;
930 break;
931 }
932 }
933
934 static inline u32 iwlagn_get_scd_ssn(struct iwlagn_tx_resp *tx_resp)
935 {
936 return le32_to_cpup((__le32 *)&tx_resp->status +
937 tx_resp->frame_count) & IEEE80211_MAX_SN;
938 }
939
940 static void iwl_rx_reply_tx_agg(struct iwl_priv *priv,
941 struct iwlagn_tx_resp *tx_resp)
942 {
943 struct agg_tx_status *frame_status = &tx_resp->status;
944 int tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
945 IWLAGN_TX_RES_TID_POS;
946 int sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
947 IWLAGN_TX_RES_RA_POS;
948 struct iwl_ht_agg *agg = &priv->tid_data[sta_id][tid].agg;
949 u32 status = le16_to_cpu(tx_resp->status.status);
950 int i;
951
952 WARN_ON(tid == IWL_TID_NON_QOS);
953
954 if (agg->wait_for_ba)
955 IWL_DEBUG_TX_REPLY(priv,
956 "got tx response w/o block-ack\n");
957
958 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
959 agg->wait_for_ba = (tx_resp->frame_count > 1);
960
961 /*
962 * If the BT kill count is non-zero, we'll get this
963 * notification again.
964 */
965 if (tx_resp->bt_kill_count && tx_resp->frame_count == 1 &&
966 priv->lib->bt_params &&
967 priv->lib->bt_params->advanced_bt_coexist) {
968 IWL_DEBUG_COEX(priv, "receive reply tx w/ bt_kill\n");
969 }
970
971 if (tx_resp->frame_count == 1)
972 return;
973
974 IWL_DEBUG_TX_REPLY(priv, "TXQ %d initial_rate 0x%x ssn %d frm_cnt %d\n",
975 agg->txq_id,
976 le32_to_cpu(tx_resp->rate_n_flags),
977 iwlagn_get_scd_ssn(tx_resp), tx_resp->frame_count);
978
979 /* Construct bit-map of pending frames within Tx window */
980 for (i = 0; i < tx_resp->frame_count; i++) {
981 u16 fstatus = le16_to_cpu(frame_status[i].status);
982 u8 retry_cnt = (fstatus & AGG_TX_TRY_MSK) >> AGG_TX_TRY_POS;
983
984 if (status & AGG_TX_STATUS_MSK)
985 iwlagn_count_agg_tx_err_status(priv, fstatus);
986
987 if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
988 AGG_TX_STATE_ABORT_MSK))
989 continue;
990
991 if (status & AGG_TX_STATUS_MSK || retry_cnt > 1)
992 IWL_DEBUG_TX_REPLY(priv,
993 "%d: status %s (0x%04x), try-count (0x%01x)\n",
994 i,
995 iwl_get_agg_tx_fail_reason(fstatus),
996 fstatus & AGG_TX_STATUS_MSK,
997 retry_cnt);
998 }
999 }
1000
1001 #ifdef CONFIG_IWLWIFI_DEBUG
1002 #define AGG_TX_STATE_FAIL(x) case AGG_TX_STATE_ ## x: return #x
1003
1004 const char *iwl_get_agg_tx_fail_reason(u16 status)
1005 {
1006 status &= AGG_TX_STATUS_MSK;
1007 switch (status) {
1008 case AGG_TX_STATE_TRANSMITTED:
1009 return "SUCCESS";
1010 AGG_TX_STATE_FAIL(UNDERRUN_MSK);
1011 AGG_TX_STATE_FAIL(BT_PRIO_MSK);
1012 AGG_TX_STATE_FAIL(FEW_BYTES_MSK);
1013 AGG_TX_STATE_FAIL(ABORT_MSK);
1014 AGG_TX_STATE_FAIL(LAST_SENT_TTL_MSK);
1015 AGG_TX_STATE_FAIL(LAST_SENT_TRY_CNT_MSK);
1016 AGG_TX_STATE_FAIL(LAST_SENT_BT_KILL_MSK);
1017 AGG_TX_STATE_FAIL(SCD_QUERY_MSK);
1018 AGG_TX_STATE_FAIL(TEST_BAD_CRC32_MSK);
1019 AGG_TX_STATE_FAIL(RESPONSE_MSK);
1020 AGG_TX_STATE_FAIL(DUMP_TX_MSK);
1021 AGG_TX_STATE_FAIL(DELAY_TX_MSK);
1022 }
1023
1024 return "UNKNOWN";
1025 }
1026 #endif /* CONFIG_IWLWIFI_DEBUG */
1027
1028 static void iwlagn_count_tx_err_status(struct iwl_priv *priv, u16 status)
1029 {
1030 status &= TX_STATUS_MSK;
1031
1032 switch (status) {
1033 case TX_STATUS_POSTPONE_DELAY:
1034 priv->reply_tx_stats.pp_delay++;
1035 break;
1036 case TX_STATUS_POSTPONE_FEW_BYTES:
1037 priv->reply_tx_stats.pp_few_bytes++;
1038 break;
1039 case TX_STATUS_POSTPONE_BT_PRIO:
1040 priv->reply_tx_stats.pp_bt_prio++;
1041 break;
1042 case TX_STATUS_POSTPONE_QUIET_PERIOD:
1043 priv->reply_tx_stats.pp_quiet_period++;
1044 break;
1045 case TX_STATUS_POSTPONE_CALC_TTAK:
1046 priv->reply_tx_stats.pp_calc_ttak++;
1047 break;
1048 case TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY:
1049 priv->reply_tx_stats.int_crossed_retry++;
1050 break;
1051 case TX_STATUS_FAIL_SHORT_LIMIT:
1052 priv->reply_tx_stats.short_limit++;
1053 break;
1054 case TX_STATUS_FAIL_LONG_LIMIT:
1055 priv->reply_tx_stats.long_limit++;
1056 break;
1057 case TX_STATUS_FAIL_FIFO_UNDERRUN:
1058 priv->reply_tx_stats.fifo_underrun++;
1059 break;
1060 case TX_STATUS_FAIL_DRAIN_FLOW:
1061 priv->reply_tx_stats.drain_flow++;
1062 break;
1063 case TX_STATUS_FAIL_RFKILL_FLUSH:
1064 priv->reply_tx_stats.rfkill_flush++;
1065 break;
1066 case TX_STATUS_FAIL_LIFE_EXPIRE:
1067 priv->reply_tx_stats.life_expire++;
1068 break;
1069 case TX_STATUS_FAIL_DEST_PS:
1070 priv->reply_tx_stats.dest_ps++;
1071 break;
1072 case TX_STATUS_FAIL_HOST_ABORTED:
1073 priv->reply_tx_stats.host_abort++;
1074 break;
1075 case TX_STATUS_FAIL_BT_RETRY:
1076 priv->reply_tx_stats.bt_retry++;
1077 break;
1078 case TX_STATUS_FAIL_STA_INVALID:
1079 priv->reply_tx_stats.sta_invalid++;
1080 break;
1081 case TX_STATUS_FAIL_FRAG_DROPPED:
1082 priv->reply_tx_stats.frag_drop++;
1083 break;
1084 case TX_STATUS_FAIL_TID_DISABLE:
1085 priv->reply_tx_stats.tid_disable++;
1086 break;
1087 case TX_STATUS_FAIL_FIFO_FLUSHED:
1088 priv->reply_tx_stats.fifo_flush++;
1089 break;
1090 case TX_STATUS_FAIL_INSUFFICIENT_CF_POLL:
1091 priv->reply_tx_stats.insuff_cf_poll++;
1092 break;
1093 case TX_STATUS_FAIL_PASSIVE_NO_RX:
1094 priv->reply_tx_stats.fail_hw_drop++;
1095 break;
1096 case TX_STATUS_FAIL_NO_BEACON_ON_RADAR:
1097 priv->reply_tx_stats.sta_color_mismatch++;
1098 break;
1099 default:
1100 priv->reply_tx_stats.unknown++;
1101 break;
1102 }
1103 }
1104
1105 static void iwlagn_set_tx_status(struct iwl_priv *priv,
1106 struct ieee80211_tx_info *info,
1107 struct iwlagn_tx_resp *tx_resp)
1108 {
1109 u16 status = le16_to_cpu(tx_resp->status.status);
1110
1111 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1112
1113 info->status.rates[0].count = tx_resp->failure_frame + 1;
1114 info->flags |= iwl_tx_status_to_mac80211(status);
1115 iwlagn_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
1116 info);
1117 if (!iwl_is_tx_success(status))
1118 iwlagn_count_tx_err_status(priv, status);
1119 }
1120
1121 static void iwl_check_abort_status(struct iwl_priv *priv,
1122 u8 frame_count, u32 status)
1123 {
1124 if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) {
1125 IWL_ERR(priv, "Tx flush command to flush out all frames\n");
1126 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
1127 queue_work(priv->workqueue, &priv->tx_flush);
1128 }
1129 }
1130
1131 void iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb)
1132 {
1133 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1134 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1135 int txq_id = SEQ_TO_QUEUE(sequence);
1136 int cmd_index __maybe_unused = SEQ_TO_INDEX(sequence);
1137 struct iwlagn_tx_resp *tx_resp = (void *)pkt->data;
1138 struct ieee80211_hdr *hdr;
1139 u32 status = le16_to_cpu(tx_resp->status.status);
1140 u16 ssn = iwlagn_get_scd_ssn(tx_resp);
1141 int tid;
1142 int sta_id;
1143 int freed;
1144 struct ieee80211_tx_info *info;
1145 struct sk_buff_head skbs;
1146 struct sk_buff *skb;
1147 struct iwl_rxon_context *ctx;
1148 bool is_agg = (txq_id >= IWLAGN_FIRST_AMPDU_QUEUE);
1149
1150 tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
1151 IWLAGN_TX_RES_TID_POS;
1152 sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
1153 IWLAGN_TX_RES_RA_POS;
1154
1155 spin_lock_bh(&priv->sta_lock);
1156
1157 if (is_agg) {
1158 WARN_ON_ONCE(sta_id >= IWLAGN_STATION_COUNT ||
1159 tid >= IWL_MAX_TID_COUNT);
1160 if (txq_id != priv->tid_data[sta_id][tid].agg.txq_id)
1161 IWL_ERR(priv, "txq_id mismatch: %d %d\n", txq_id,
1162 priv->tid_data[sta_id][tid].agg.txq_id);
1163 iwl_rx_reply_tx_agg(priv, tx_resp);
1164 }
1165
1166 __skb_queue_head_init(&skbs);
1167
1168 if (tx_resp->frame_count == 1) {
1169 u16 next_reclaimed = le16_to_cpu(tx_resp->seq_ctl);
1170 next_reclaimed = IEEE80211_SEQ_TO_SN(next_reclaimed + 0x10);
1171
1172 if (is_agg) {
1173 /* If this is an aggregation queue, we can rely on the
1174 * ssn since the wifi sequence number corresponds to
1175 * the index in the TFD ring (%256).
1176 * The seq_ctl is the sequence control of the packet
1177 * to which this Tx response relates. But if there is a
1178 * hole in the bitmap of the BA we received, this Tx
1179 * response may allow to reclaim the hole and all the
1180 * subsequent packets that were already acked.
1181 * In that case, seq_ctl != ssn, and the next packet
1182 * to be reclaimed will be ssn and not seq_ctl.
1183 */
1184 next_reclaimed = ssn;
1185 }
1186
1187 if (tid != IWL_TID_NON_QOS) {
1188 priv->tid_data[sta_id][tid].next_reclaimed =
1189 next_reclaimed;
1190 IWL_DEBUG_TX_REPLY(priv, "Next reclaimed packet:%d\n",
1191 next_reclaimed);
1192 }
1193
1194 iwl_trans_reclaim(priv->trans, txq_id, ssn, &skbs);
1195
1196 iwlagn_check_ratid_empty(priv, sta_id, tid);
1197 freed = 0;
1198
1199 /* process frames */
1200 skb_queue_walk(&skbs, skb) {
1201 hdr = (struct ieee80211_hdr *)skb->data;
1202
1203 if (!ieee80211_is_data_qos(hdr->frame_control))
1204 priv->last_seq_ctl = tx_resp->seq_ctl;
1205
1206 info = IEEE80211_SKB_CB(skb);
1207 ctx = info->driver_data[0];
1208 iwl_trans_free_tx_cmd(priv->trans,
1209 info->driver_data[1]);
1210
1211 memset(&info->status, 0, sizeof(info->status));
1212
1213 if (status == TX_STATUS_FAIL_PASSIVE_NO_RX &&
1214 ctx->vif &&
1215 ctx->vif->type == NL80211_IFTYPE_STATION) {
1216 /* block and stop all queues */
1217 priv->passive_no_rx = true;
1218 IWL_DEBUG_TX_QUEUES(priv,
1219 "stop all queues: passive channel\n");
1220 ieee80211_stop_queues(priv->hw);
1221
1222 IWL_DEBUG_TX_REPLY(priv,
1223 "TXQ %d status %s (0x%08x) "
1224 "rate_n_flags 0x%x retries %d\n",
1225 txq_id,
1226 iwl_get_tx_fail_reason(status),
1227 status,
1228 le32_to_cpu(tx_resp->rate_n_flags),
1229 tx_resp->failure_frame);
1230
1231 IWL_DEBUG_TX_REPLY(priv,
1232 "FrameCnt = %d, idx=%d\n",
1233 tx_resp->frame_count, cmd_index);
1234 }
1235
1236 /* check if BAR is needed */
1237 if (is_agg && !iwl_is_tx_success(status))
1238 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1239 iwlagn_set_tx_status(priv, IEEE80211_SKB_CB(skb),
1240 tx_resp);
1241 if (!is_agg)
1242 iwlagn_non_agg_tx_status(priv, ctx, hdr->addr1);
1243
1244 freed++;
1245 }
1246
1247 if (tid != IWL_TID_NON_QOS) {
1248 priv->tid_data[sta_id][tid].next_reclaimed =
1249 next_reclaimed;
1250 IWL_DEBUG_TX_REPLY(priv, "Next reclaimed packet:%d\n",
1251 next_reclaimed);
1252 }
1253
1254 if (!is_agg && freed != 1)
1255 IWL_ERR(priv, "Q: %d, freed %d\n", txq_id, freed);
1256
1257 IWL_DEBUG_TX_REPLY(priv, "TXQ %d status %s (0x%08x)\n", txq_id,
1258 iwl_get_tx_fail_reason(status), status);
1259
1260 IWL_DEBUG_TX_REPLY(priv,
1261 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d seq_ctl=0x%x\n",
1262 le32_to_cpu(tx_resp->rate_n_flags),
1263 tx_resp->failure_frame,
1264 SEQ_TO_INDEX(sequence), ssn,
1265 le16_to_cpu(tx_resp->seq_ctl));
1266 }
1267
1268 iwl_check_abort_status(priv, tx_resp->frame_count, status);
1269 spin_unlock_bh(&priv->sta_lock);
1270
1271 while (!skb_queue_empty(&skbs)) {
1272 skb = __skb_dequeue(&skbs);
1273 ieee80211_tx_status(priv->hw, skb);
1274 }
1275 }
1276
1277 /**
1278 * iwlagn_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
1279 *
1280 * Handles block-acknowledge notification from device, which reports success
1281 * of frames sent via aggregation.
1282 */
1283 void iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv,
1284 struct iwl_rx_cmd_buffer *rxb)
1285 {
1286 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1287 struct iwl_compressed_ba_resp *ba_resp = (void *)pkt->data;
1288 struct iwl_ht_agg *agg;
1289 struct sk_buff_head reclaimed_skbs;
1290 struct sk_buff *skb;
1291 int sta_id;
1292 int tid;
1293 int freed;
1294
1295 /* "flow" corresponds to Tx queue */
1296 u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
1297
1298 /* "ssn" is start of block-ack Tx window, corresponds to index
1299 * (in Tx queue's circular buffer) of first TFD/frame in window */
1300 u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
1301
1302 if (scd_flow >= priv->cfg->base_params->num_of_queues) {
1303 IWL_ERR(priv,
1304 "BUG_ON scd_flow is bigger than number of queues\n");
1305 return;
1306 }
1307
1308 sta_id = ba_resp->sta_id;
1309 tid = ba_resp->tid;
1310 agg = &priv->tid_data[sta_id][tid].agg;
1311
1312 spin_lock_bh(&priv->sta_lock);
1313
1314 if (unlikely(!agg->wait_for_ba)) {
1315 if (unlikely(ba_resp->bitmap))
1316 IWL_ERR(priv, "Received BA when not expected\n");
1317 spin_unlock_bh(&priv->sta_lock);
1318 return;
1319 }
1320
1321 if (unlikely(scd_flow != agg->txq_id)) {
1322 /*
1323 * FIXME: this is a uCode bug which need to be addressed,
1324 * log the information and return for now.
1325 * Since it is can possibly happen very often and in order
1326 * not to fill the syslog, don't use IWL_ERR or IWL_WARN
1327 */
1328 IWL_DEBUG_TX_QUEUES(priv,
1329 "Bad queue mapping txq_id=%d, agg_txq[sta:%d,tid:%d]=%d\n",
1330 scd_flow, sta_id, tid, agg->txq_id);
1331 spin_unlock_bh(&priv->sta_lock);
1332 return;
1333 }
1334
1335 __skb_queue_head_init(&reclaimed_skbs);
1336
1337 /* Release all TFDs before the SSN, i.e. all TFDs in front of
1338 * block-ack window (we assume that they've been successfully
1339 * transmitted ... if not, it's too late anyway). */
1340 iwl_trans_reclaim(priv->trans, scd_flow, ba_resp_scd_ssn,
1341 &reclaimed_skbs);
1342
1343 IWL_DEBUG_TX_REPLY(priv, "REPLY_COMPRESSED_BA [%d] Received from %pM, "
1344 "sta_id = %d\n",
1345 agg->wait_for_ba,
1346 (u8 *) &ba_resp->sta_addr_lo32,
1347 ba_resp->sta_id);
1348 IWL_DEBUG_TX_REPLY(priv, "TID = %d, SeqCtl = %d, bitmap = 0x%llx, "
1349 "scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
1350 ba_resp->tid, le16_to_cpu(ba_resp->seq_ctl),
1351 (unsigned long long)le64_to_cpu(ba_resp->bitmap),
1352 scd_flow, ba_resp_scd_ssn, ba_resp->txed,
1353 ba_resp->txed_2_done);
1354
1355 /* Mark that the expected block-ack response arrived */
1356 agg->wait_for_ba = false;
1357
1358 /* Sanity check values reported by uCode */
1359 if (ba_resp->txed_2_done > ba_resp->txed) {
1360 IWL_DEBUG_TX_REPLY(priv,
1361 "bogus sent(%d) and ack(%d) count\n",
1362 ba_resp->txed, ba_resp->txed_2_done);
1363 /*
1364 * set txed_2_done = txed,
1365 * so it won't impact rate scale
1366 */
1367 ba_resp->txed = ba_resp->txed_2_done;
1368 }
1369
1370 priv->tid_data[sta_id][tid].next_reclaimed = ba_resp_scd_ssn;
1371
1372 iwlagn_check_ratid_empty(priv, sta_id, tid);
1373 freed = 0;
1374
1375 skb_queue_walk(&reclaimed_skbs, skb) {
1376 struct ieee80211_hdr *hdr = (void *)skb->data;
1377 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1378
1379 if (ieee80211_is_data_qos(hdr->frame_control))
1380 freed++;
1381 else
1382 WARN_ON_ONCE(1);
1383
1384 iwl_trans_free_tx_cmd(priv->trans, info->driver_data[1]);
1385
1386 memset(&info->status, 0, sizeof(info->status));
1387 /* Packet was transmitted successfully, failures come as single
1388 * frames because before failing a frame the firmware transmits
1389 * it without aggregation at least once.
1390 */
1391 info->flags |= IEEE80211_TX_STAT_ACK;
1392
1393 if (freed == 1) {
1394 /* this is the first skb we deliver in this batch */
1395 /* put the rate scaling data there */
1396 info = IEEE80211_SKB_CB(skb);
1397 memset(&info->status, 0, sizeof(info->status));
1398 info->flags |= IEEE80211_TX_STAT_AMPDU;
1399 info->status.ampdu_ack_len = ba_resp->txed_2_done;
1400 info->status.ampdu_len = ba_resp->txed;
1401 iwlagn_hwrate_to_tx_control(priv, agg->rate_n_flags,
1402 info);
1403 }
1404 }
1405
1406 spin_unlock_bh(&priv->sta_lock);
1407
1408 while (!skb_queue_empty(&reclaimed_skbs)) {
1409 skb = __skb_dequeue(&reclaimed_skbs);
1410 ieee80211_tx_status(priv->hw, skb);
1411 }
1412 }
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