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iwlwifi: use threaded interrupt handler
[deliverable/linux.git] / drivers / net / wireless / iwlwifi / dvm / tx.c
1 /******************************************************************************
2 *
3 * GPL LICENSE SUMMARY
4 *
5 * Copyright(c) 2008 - 2013 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 #include "iwl-io.h"
36 #include "iwl-trans.h"
37 #include "iwl-agn-hw.h"
38 #include "dev.h"
39 #include "agn.h"
40
41 static const u8 tid_to_ac[] = {
42 IEEE80211_AC_BE,
43 IEEE80211_AC_BK,
44 IEEE80211_AC_BK,
45 IEEE80211_AC_BE,
46 IEEE80211_AC_VI,
47 IEEE80211_AC_VI,
48 IEEE80211_AC_VO,
49 IEEE80211_AC_VO,
50 };
51
52 static void iwlagn_tx_cmd_protection(struct iwl_priv *priv,
53 struct ieee80211_tx_info *info,
54 __le16 fc, __le32 *tx_flags)
55 {
56 if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS ||
57 info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT ||
58 info->flags & IEEE80211_TX_CTL_AMPDU)
59 *tx_flags |= TX_CMD_FLG_PROT_REQUIRE_MSK;
60 }
61
62 /*
63 * handle build REPLY_TX command notification.
64 */
65 static void iwlagn_tx_cmd_build_basic(struct iwl_priv *priv,
66 struct sk_buff *skb,
67 struct iwl_tx_cmd *tx_cmd,
68 struct ieee80211_tx_info *info,
69 struct ieee80211_hdr *hdr, u8 sta_id)
70 {
71 __le16 fc = hdr->frame_control;
72 __le32 tx_flags = tx_cmd->tx_flags;
73
74 tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
75
76 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
77 tx_flags |= TX_CMD_FLG_ACK_MSK;
78 else
79 tx_flags &= ~TX_CMD_FLG_ACK_MSK;
80
81 if (ieee80211_is_probe_resp(fc))
82 tx_flags |= TX_CMD_FLG_TSF_MSK;
83 else if (ieee80211_is_back_req(fc))
84 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK;
85 else if (info->band == IEEE80211_BAND_2GHZ &&
86 priv->cfg->bt_params &&
87 priv->cfg->bt_params->advanced_bt_coexist &&
88 (ieee80211_is_auth(fc) || ieee80211_is_assoc_req(fc) ||
89 ieee80211_is_reassoc_req(fc) ||
90 skb->protocol == cpu_to_be16(ETH_P_PAE)))
91 tx_flags |= TX_CMD_FLG_IGNORE_BT;
92
93
94 tx_cmd->sta_id = sta_id;
95 if (ieee80211_has_morefrags(fc))
96 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
97
98 if (ieee80211_is_data_qos(fc)) {
99 u8 *qc = ieee80211_get_qos_ctl(hdr);
100 tx_cmd->tid_tspec = qc[0] & 0xf;
101 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
102 } else {
103 tx_cmd->tid_tspec = IWL_TID_NON_QOS;
104 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
105 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
106 else
107 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
108 }
109
110 iwlagn_tx_cmd_protection(priv, info, fc, &tx_flags);
111
112 tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
113 if (ieee80211_is_mgmt(fc)) {
114 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
115 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
116 else
117 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
118 } else {
119 tx_cmd->timeout.pm_frame_timeout = 0;
120 }
121
122 tx_cmd->driver_txop = 0;
123 tx_cmd->tx_flags = tx_flags;
124 tx_cmd->next_frame_len = 0;
125 }
126
127 static void iwlagn_tx_cmd_build_rate(struct iwl_priv *priv,
128 struct iwl_tx_cmd *tx_cmd,
129 struct ieee80211_tx_info *info,
130 struct ieee80211_sta *sta,
131 __le16 fc)
132 {
133 u32 rate_flags;
134 int rate_idx;
135 u8 rts_retry_limit;
136 u8 data_retry_limit;
137 u8 rate_plcp;
138
139 if (priv->wowlan) {
140 rts_retry_limit = IWLAGN_LOW_RETRY_LIMIT;
141 data_retry_limit = IWLAGN_LOW_RETRY_LIMIT;
142 } else {
143 /* Set retry limit on RTS packets */
144 rts_retry_limit = IWLAGN_RTS_DFAULT_RETRY_LIMIT;
145
146 /* Set retry limit on DATA packets and Probe Responses*/
147 if (ieee80211_is_probe_resp(fc)) {
148 data_retry_limit = IWLAGN_MGMT_DFAULT_RETRY_LIMIT;
149 rts_retry_limit =
150 min(data_retry_limit, rts_retry_limit);
151 } else if (ieee80211_is_back_req(fc))
152 data_retry_limit = IWLAGN_BAR_DFAULT_RETRY_LIMIT;
153 else
154 data_retry_limit = IWLAGN_DEFAULT_TX_RETRY;
155 }
156
157 tx_cmd->data_retry_limit = data_retry_limit;
158 tx_cmd->rts_retry_limit = rts_retry_limit;
159
160 /* DATA packets will use the uCode station table for rate/antenna
161 * selection */
162 if (ieee80211_is_data(fc)) {
163 tx_cmd->initial_rate_index = 0;
164 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
165 #ifdef CONFIG_IWLWIFI_DEVICE_TESTMODE
166 if (priv->tm_fixed_rate) {
167 /*
168 * rate overwrite by testmode
169 * we not only send lq command to change rate
170 * we also re-enforce per data pkt base.
171 */
172 tx_cmd->tx_flags &= ~TX_CMD_FLG_STA_RATE_MSK;
173 memcpy(&tx_cmd->rate_n_flags, &priv->tm_fixed_rate,
174 sizeof(tx_cmd->rate_n_flags));
175 }
176 #endif
177 return;
178 } else if (ieee80211_is_back_req(fc))
179 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
180
181 /**
182 * If the current TX rate stored in mac80211 has the MCS bit set, it's
183 * not really a TX rate. Thus, we use the lowest supported rate for
184 * this band. Also use the lowest supported rate if the stored rate
185 * index is invalid.
186 */
187 rate_idx = info->control.rates[0].idx;
188 if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS ||
189 (rate_idx < 0) || (rate_idx > IWL_RATE_COUNT_LEGACY))
190 rate_idx = rate_lowest_index(
191 &priv->nvm_data->bands[info->band], sta);
192 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
193 if (info->band == IEEE80211_BAND_5GHZ)
194 rate_idx += IWL_FIRST_OFDM_RATE;
195 /* Get PLCP rate for tx_cmd->rate_n_flags */
196 rate_plcp = iwl_rates[rate_idx].plcp;
197 /* Zero out flags for this packet */
198 rate_flags = 0;
199
200 /* Set CCK flag as needed */
201 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
202 rate_flags |= RATE_MCS_CCK_MSK;
203
204 /* Set up antennas */
205 if (priv->cfg->bt_params &&
206 priv->cfg->bt_params->advanced_bt_coexist &&
207 priv->bt_full_concurrent) {
208 /* operated as 1x1 in full concurrency mode */
209 priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
210 first_antenna(priv->nvm_data->valid_tx_ant));
211 } else
212 priv->mgmt_tx_ant = iwl_toggle_tx_ant(
213 priv, priv->mgmt_tx_ant,
214 priv->nvm_data->valid_tx_ant);
215 rate_flags |= iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
216
217 /* Set the rate in the TX cmd */
218 tx_cmd->rate_n_flags = iwl_hw_set_rate_n_flags(rate_plcp, rate_flags);
219 }
220
221 static void iwlagn_tx_cmd_build_hwcrypto(struct iwl_priv *priv,
222 struct ieee80211_tx_info *info,
223 struct iwl_tx_cmd *tx_cmd,
224 struct sk_buff *skb_frag)
225 {
226 struct ieee80211_key_conf *keyconf = info->control.hw_key;
227
228 switch (keyconf->cipher) {
229 case WLAN_CIPHER_SUITE_CCMP:
230 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
231 memcpy(tx_cmd->key, keyconf->key, keyconf->keylen);
232 if (info->flags & IEEE80211_TX_CTL_AMPDU)
233 tx_cmd->tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
234 break;
235
236 case WLAN_CIPHER_SUITE_TKIP:
237 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
238 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
239 break;
240
241 case WLAN_CIPHER_SUITE_WEP104:
242 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
243 /* fall through */
244 case WLAN_CIPHER_SUITE_WEP40:
245 tx_cmd->sec_ctl |= (TX_CMD_SEC_WEP |
246 (keyconf->keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT);
247
248 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
249
250 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
251 "with key %d\n", keyconf->keyidx);
252 break;
253
254 default:
255 IWL_ERR(priv, "Unknown encode cipher %x\n", keyconf->cipher);
256 break;
257 }
258 }
259
260 /**
261 * iwl_sta_id_or_broadcast - return sta_id or broadcast sta
262 * @context: the current context
263 * @sta: mac80211 station
264 *
265 * In certain circumstances mac80211 passes a station pointer
266 * that may be %NULL, for example during TX or key setup. In
267 * that case, we need to use the broadcast station, so this
268 * inline wraps that pattern.
269 */
270 static int iwl_sta_id_or_broadcast(struct iwl_rxon_context *context,
271 struct ieee80211_sta *sta)
272 {
273 int sta_id;
274
275 if (!sta)
276 return context->bcast_sta_id;
277
278 sta_id = iwl_sta_id(sta);
279
280 /*
281 * mac80211 should not be passing a partially
282 * initialised station!
283 */
284 WARN_ON(sta_id == IWL_INVALID_STATION);
285
286 return sta_id;
287 }
288
289 /*
290 * start REPLY_TX command process
291 */
292 int iwlagn_tx_skb(struct iwl_priv *priv,
293 struct ieee80211_sta *sta,
294 struct sk_buff *skb)
295 {
296 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
297 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
298 struct iwl_station_priv *sta_priv = NULL;
299 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
300 struct iwl_device_cmd *dev_cmd;
301 struct iwl_tx_cmd *tx_cmd;
302 __le16 fc;
303 u8 hdr_len;
304 u16 len, seq_number = 0;
305 u8 sta_id, tid = IWL_MAX_TID_COUNT;
306 bool is_agg = false, is_data_qos = false;
307 int txq_id;
308
309 if (info->control.vif)
310 ctx = iwl_rxon_ctx_from_vif(info->control.vif);
311
312 if (iwl_is_rfkill(priv)) {
313 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
314 goto drop_unlock_priv;
315 }
316
317 fc = hdr->frame_control;
318
319 #ifdef CONFIG_IWLWIFI_DEBUG
320 if (ieee80211_is_auth(fc))
321 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
322 else if (ieee80211_is_assoc_req(fc))
323 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
324 else if (ieee80211_is_reassoc_req(fc))
325 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
326 #endif
327
328 if (unlikely(ieee80211_is_probe_resp(fc))) {
329 struct iwl_wipan_noa_data *noa_data =
330 rcu_dereference(priv->noa_data);
331
332 if (noa_data &&
333 pskb_expand_head(skb, 0, noa_data->length,
334 GFP_ATOMIC) == 0) {
335 memcpy(skb_put(skb, noa_data->length),
336 noa_data->data, noa_data->length);
337 hdr = (struct ieee80211_hdr *)skb->data;
338 }
339 }
340
341 hdr_len = ieee80211_hdrlen(fc);
342
343 /* For management frames use broadcast id to do not break aggregation */
344 if (!ieee80211_is_data(fc))
345 sta_id = ctx->bcast_sta_id;
346 else {
347 /* Find index into station table for destination station */
348 sta_id = iwl_sta_id_or_broadcast(ctx, sta);
349 if (sta_id == IWL_INVALID_STATION) {
350 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
351 hdr->addr1);
352 goto drop_unlock_priv;
353 }
354 }
355
356 if (sta)
357 sta_priv = (void *)sta->drv_priv;
358
359 if (sta_priv && sta_priv->asleep &&
360 (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER)) {
361 /*
362 * This sends an asynchronous command to the device,
363 * but we can rely on it being processed before the
364 * next frame is processed -- and the next frame to
365 * this station is the one that will consume this
366 * counter.
367 * For now set the counter to just 1 since we do not
368 * support uAPSD yet.
369 *
370 * FIXME: If we get two non-bufferable frames one
371 * after the other, we might only send out one of
372 * them because this is racy.
373 */
374 iwl_sta_modify_sleep_tx_count(priv, sta_id, 1);
375 }
376
377 dev_cmd = iwl_trans_alloc_tx_cmd(priv->trans);
378
379 if (unlikely(!dev_cmd))
380 goto drop_unlock_priv;
381
382 memset(dev_cmd, 0, sizeof(*dev_cmd));
383 tx_cmd = (struct iwl_tx_cmd *) dev_cmd->payload;
384
385 /* Total # bytes to be transmitted */
386 len = (u16)skb->len;
387 tx_cmd->len = cpu_to_le16(len);
388
389 if (info->control.hw_key)
390 iwlagn_tx_cmd_build_hwcrypto(priv, info, tx_cmd, skb);
391
392 /* TODO need this for burst mode later on */
393 iwlagn_tx_cmd_build_basic(priv, skb, tx_cmd, info, hdr, sta_id);
394
395 iwlagn_tx_cmd_build_rate(priv, tx_cmd, info, sta, fc);
396
397 memset(&info->status, 0, sizeof(info->status));
398
399 info->driver_data[0] = ctx;
400 info->driver_data[1] = dev_cmd;
401 /* From now on, we cannot access info->control */
402
403 spin_lock(&priv->sta_lock);
404
405 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
406 u8 *qc = NULL;
407 struct iwl_tid_data *tid_data;
408 qc = ieee80211_get_qos_ctl(hdr);
409 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
410 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
411 goto drop_unlock_sta;
412 tid_data = &priv->tid_data[sta_id][tid];
413
414 /* aggregation is on for this <sta,tid> */
415 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
416 tid_data->agg.state != IWL_AGG_ON) {
417 IWL_ERR(priv, "TX_CTL_AMPDU while not in AGG:"
418 " Tx flags = 0x%08x, agg.state = %d",
419 info->flags, tid_data->agg.state);
420 IWL_ERR(priv, "sta_id = %d, tid = %d seq_num = %d",
421 sta_id, tid, SEQ_TO_SN(tid_data->seq_number));
422 goto drop_unlock_sta;
423 }
424
425 /* We can receive packets from the stack in IWL_AGG_{ON,OFF}
426 * only. Check this here.
427 */
428 if (WARN_ONCE(tid_data->agg.state != IWL_AGG_ON &&
429 tid_data->agg.state != IWL_AGG_OFF,
430 "Tx while agg.state = %d", tid_data->agg.state))
431 goto drop_unlock_sta;
432
433 seq_number = tid_data->seq_number;
434 seq_number &= IEEE80211_SCTL_SEQ;
435 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
436 hdr->seq_ctrl |= cpu_to_le16(seq_number);
437 seq_number += 0x10;
438
439 if (info->flags & IEEE80211_TX_CTL_AMPDU)
440 is_agg = true;
441 is_data_qos = true;
442 }
443
444 /* Copy MAC header from skb into command buffer */
445 memcpy(tx_cmd->hdr, hdr, hdr_len);
446
447 if (is_agg)
448 txq_id = priv->tid_data[sta_id][tid].agg.txq_id;
449 else if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) {
450 /*
451 * Send this frame after DTIM -- there's a special queue
452 * reserved for this for contexts that support AP mode.
453 */
454 txq_id = ctx->mcast_queue;
455
456 /*
457 * The microcode will clear the more data
458 * bit in the last frame it transmits.
459 */
460 hdr->frame_control |=
461 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
462 } else if (info->flags & IEEE80211_TX_CTL_TX_OFFCHAN)
463 txq_id = IWL_AUX_QUEUE;
464 else
465 txq_id = ctx->ac_to_queue[skb_get_queue_mapping(skb)];
466
467 WARN_ON_ONCE(!is_agg && txq_id != info->hw_queue);
468 WARN_ON_ONCE(is_agg &&
469 priv->queue_to_mac80211[txq_id] != info->hw_queue);
470
471 IWL_DEBUG_TX(priv, "TX to [%d|%d] Q:%d - seq: 0x%x\n", sta_id, tid,
472 txq_id, seq_number);
473
474 if (iwl_trans_tx(priv->trans, skb, dev_cmd, txq_id))
475 goto drop_unlock_sta;
476
477 if (is_data_qos && !ieee80211_has_morefrags(fc))
478 priv->tid_data[sta_id][tid].seq_number = seq_number;
479
480 spin_unlock(&priv->sta_lock);
481
482 /*
483 * Avoid atomic ops if it isn't an associated client.
484 * Also, if this is a packet for aggregation, don't
485 * increase the counter because the ucode will stop
486 * aggregation queues when their respective station
487 * goes to sleep.
488 */
489 if (sta_priv && sta_priv->client && !is_agg)
490 atomic_inc(&sta_priv->pending_frames);
491
492 if (info->flags & IEEE80211_TX_CTL_TX_OFFCHAN)
493 iwl_scan_offchannel_skb(priv);
494
495 return 0;
496
497 drop_unlock_sta:
498 if (dev_cmd)
499 iwl_trans_free_tx_cmd(priv->trans, dev_cmd);
500 spin_unlock(&priv->sta_lock);
501 drop_unlock_priv:
502 return -1;
503 }
504
505 static int iwlagn_alloc_agg_txq(struct iwl_priv *priv, int mq)
506 {
507 int q;
508
509 for (q = IWLAGN_FIRST_AMPDU_QUEUE;
510 q < priv->cfg->base_params->num_of_queues; q++) {
511 if (!test_and_set_bit(q, priv->agg_q_alloc)) {
512 priv->queue_to_mac80211[q] = mq;
513 return q;
514 }
515 }
516
517 return -ENOSPC;
518 }
519
520 static void iwlagn_dealloc_agg_txq(struct iwl_priv *priv, int q)
521 {
522 clear_bit(q, priv->agg_q_alloc);
523 priv->queue_to_mac80211[q] = IWL_INVALID_MAC80211_QUEUE;
524 }
525
526 int iwlagn_tx_agg_stop(struct iwl_priv *priv, struct ieee80211_vif *vif,
527 struct ieee80211_sta *sta, u16 tid)
528 {
529 struct iwl_tid_data *tid_data;
530 int sta_id, txq_id;
531 enum iwl_agg_state agg_state;
532
533 sta_id = iwl_sta_id(sta);
534
535 if (sta_id == IWL_INVALID_STATION) {
536 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
537 return -ENXIO;
538 }
539
540 spin_lock_bh(&priv->sta_lock);
541
542 tid_data = &priv->tid_data[sta_id][tid];
543 txq_id = tid_data->agg.txq_id;
544
545 switch (tid_data->agg.state) {
546 case IWL_EMPTYING_HW_QUEUE_ADDBA:
547 /*
548 * This can happen if the peer stops aggregation
549 * again before we've had a chance to drain the
550 * queue we selected previously, i.e. before the
551 * session was really started completely.
552 */
553 IWL_DEBUG_HT(priv, "AGG stop before setup done\n");
554 goto turn_off;
555 case IWL_AGG_STARTING:
556 /*
557 * This can happen when the session is stopped before
558 * we receive ADDBA response
559 */
560 IWL_DEBUG_HT(priv, "AGG stop before AGG became operational\n");
561 goto turn_off;
562 case IWL_AGG_ON:
563 break;
564 default:
565 IWL_WARN(priv,
566 "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
567 sta_id, tid, tid_data->agg.state);
568 spin_unlock_bh(&priv->sta_lock);
569 return 0;
570 }
571
572 tid_data->agg.ssn = SEQ_TO_SN(tid_data->seq_number);
573
574 /* There are still packets for this RA / TID in the HW */
575 if (!test_bit(txq_id, priv->agg_q_alloc)) {
576 IWL_DEBUG_TX_QUEUES(priv,
577 "stopping AGG on STA/TID %d/%d but hwq %d not used\n",
578 sta_id, tid, txq_id);
579 } else if (tid_data->agg.ssn != tid_data->next_reclaimed) {
580 IWL_DEBUG_TX_QUEUES(priv,
581 "Can't proceed: ssn %d, next_recl = %d\n",
582 tid_data->agg.ssn,
583 tid_data->next_reclaimed);
584 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_DELBA;
585 spin_unlock_bh(&priv->sta_lock);
586 return 0;
587 }
588
589 IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d\n",
590 tid_data->agg.ssn);
591 turn_off:
592 agg_state = tid_data->agg.state;
593 tid_data->agg.state = IWL_AGG_OFF;
594
595 spin_unlock_bh(&priv->sta_lock);
596
597 if (test_bit(txq_id, priv->agg_q_alloc)) {
598 /*
599 * If the transport didn't know that we wanted to start
600 * agreggation, don't tell it that we want to stop them.
601 * This can happen when we don't get the addBA response on
602 * time, or we hadn't time to drain the AC queues.
603 */
604 if (agg_state == IWL_AGG_ON)
605 iwl_trans_txq_disable(priv->trans, txq_id);
606 else
607 IWL_DEBUG_TX_QUEUES(priv, "Don't disable tx agg: %d\n",
608 agg_state);
609 iwlagn_dealloc_agg_txq(priv, txq_id);
610 }
611
612 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
613
614 return 0;
615 }
616
617 int iwlagn_tx_agg_start(struct iwl_priv *priv, struct ieee80211_vif *vif,
618 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
619 {
620 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
621 struct iwl_tid_data *tid_data;
622 int sta_id, txq_id, ret;
623
624 IWL_DEBUG_HT(priv, "TX AGG request on ra = %pM tid = %d\n",
625 sta->addr, tid);
626
627 sta_id = iwl_sta_id(sta);
628 if (sta_id == IWL_INVALID_STATION) {
629 IWL_ERR(priv, "Start AGG on invalid station\n");
630 return -ENXIO;
631 }
632 if (unlikely(tid >= IWL_MAX_TID_COUNT))
633 return -EINVAL;
634
635 if (priv->tid_data[sta_id][tid].agg.state != IWL_AGG_OFF) {
636 IWL_ERR(priv, "Start AGG when state is not IWL_AGG_OFF !\n");
637 return -ENXIO;
638 }
639
640 txq_id = iwlagn_alloc_agg_txq(priv, ctx->ac_to_queue[tid_to_ac[tid]]);
641 if (txq_id < 0) {
642 IWL_DEBUG_TX_QUEUES(priv,
643 "No free aggregation queue for %pM/%d\n",
644 sta->addr, tid);
645 return txq_id;
646 }
647
648 ret = iwl_sta_tx_modify_enable_tid(priv, sta_id, tid);
649 if (ret)
650 return ret;
651
652 spin_lock_bh(&priv->sta_lock);
653 tid_data = &priv->tid_data[sta_id][tid];
654 tid_data->agg.ssn = SEQ_TO_SN(tid_data->seq_number);
655 tid_data->agg.txq_id = txq_id;
656
657 *ssn = tid_data->agg.ssn;
658
659 if (*ssn == tid_data->next_reclaimed) {
660 IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d\n",
661 tid_data->agg.ssn);
662 tid_data->agg.state = IWL_AGG_STARTING;
663 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
664 } else {
665 IWL_DEBUG_TX_QUEUES(priv, "Can't proceed: ssn %d, "
666 "next_reclaimed = %d\n",
667 tid_data->agg.ssn,
668 tid_data->next_reclaimed);
669 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA;
670 }
671 spin_unlock_bh(&priv->sta_lock);
672
673 return ret;
674 }
675
676 int iwlagn_tx_agg_oper(struct iwl_priv *priv, struct ieee80211_vif *vif,
677 struct ieee80211_sta *sta, u16 tid, u8 buf_size)
678 {
679 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
680 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
681 int q, fifo;
682 u16 ssn;
683
684 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
685
686 spin_lock_bh(&priv->sta_lock);
687 ssn = priv->tid_data[sta_priv->sta_id][tid].agg.ssn;
688 q = priv->tid_data[sta_priv->sta_id][tid].agg.txq_id;
689 priv->tid_data[sta_priv->sta_id][tid].agg.state = IWL_AGG_ON;
690 spin_unlock_bh(&priv->sta_lock);
691
692 fifo = ctx->ac_to_fifo[tid_to_ac[tid]];
693
694 iwl_trans_txq_enable(priv->trans, q, fifo, sta_priv->sta_id, tid,
695 buf_size, ssn);
696
697 /*
698 * If the limit is 0, then it wasn't initialised yet,
699 * use the default. We can do that since we take the
700 * minimum below, and we don't want to go above our
701 * default due to hardware restrictions.
702 */
703 if (sta_priv->max_agg_bufsize == 0)
704 sta_priv->max_agg_bufsize =
705 LINK_QUAL_AGG_FRAME_LIMIT_DEF;
706
707 /*
708 * Even though in theory the peer could have different
709 * aggregation reorder buffer sizes for different sessions,
710 * our ucode doesn't allow for that and has a global limit
711 * for each station. Therefore, use the minimum of all the
712 * aggregation sessions and our default value.
713 */
714 sta_priv->max_agg_bufsize =
715 min(sta_priv->max_agg_bufsize, buf_size);
716
717 if (priv->hw_params.use_rts_for_aggregation) {
718 /*
719 * switch to RTS/CTS if it is the prefer protection
720 * method for HT traffic
721 */
722
723 sta_priv->lq_sta.lq.general_params.flags |=
724 LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
725 }
726 priv->agg_tids_count++;
727 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
728 priv->agg_tids_count);
729
730 sta_priv->lq_sta.lq.agg_params.agg_frame_cnt_limit =
731 sta_priv->max_agg_bufsize;
732
733 IWL_DEBUG_HT(priv, "Tx aggregation enabled on ra = %pM tid = %d\n",
734 sta->addr, tid);
735
736 return iwl_send_lq_cmd(priv, ctx,
737 &sta_priv->lq_sta.lq, CMD_ASYNC, false);
738 }
739
740 static void iwlagn_check_ratid_empty(struct iwl_priv *priv, int sta_id, u8 tid)
741 {
742 struct iwl_tid_data *tid_data = &priv->tid_data[sta_id][tid];
743 enum iwl_rxon_context_id ctx;
744 struct ieee80211_vif *vif;
745 u8 *addr;
746
747 lockdep_assert_held(&priv->sta_lock);
748
749 addr = priv->stations[sta_id].sta.sta.addr;
750 ctx = priv->stations[sta_id].ctxid;
751 vif = priv->contexts[ctx].vif;
752
753 switch (priv->tid_data[sta_id][tid].agg.state) {
754 case IWL_EMPTYING_HW_QUEUE_DELBA:
755 /* There are no packets for this RA / TID in the HW any more */
756 if (tid_data->agg.ssn == tid_data->next_reclaimed) {
757 IWL_DEBUG_TX_QUEUES(priv,
758 "Can continue DELBA flow ssn = next_recl ="
759 " %d", tid_data->next_reclaimed);
760 iwl_trans_txq_disable(priv->trans,
761 tid_data->agg.txq_id);
762 iwlagn_dealloc_agg_txq(priv, tid_data->agg.txq_id);
763 tid_data->agg.state = IWL_AGG_OFF;
764 ieee80211_stop_tx_ba_cb_irqsafe(vif, addr, tid);
765 }
766 break;
767 case IWL_EMPTYING_HW_QUEUE_ADDBA:
768 /* There are no packets for this RA / TID in the HW any more */
769 if (tid_data->agg.ssn == tid_data->next_reclaimed) {
770 IWL_DEBUG_TX_QUEUES(priv,
771 "Can continue ADDBA flow ssn = next_recl ="
772 " %d", tid_data->next_reclaimed);
773 tid_data->agg.state = IWL_AGG_STARTING;
774 ieee80211_start_tx_ba_cb_irqsafe(vif, addr, tid);
775 }
776 break;
777 default:
778 break;
779 }
780 }
781
782 static void iwlagn_non_agg_tx_status(struct iwl_priv *priv,
783 struct iwl_rxon_context *ctx,
784 const u8 *addr1)
785 {
786 struct ieee80211_sta *sta;
787 struct iwl_station_priv *sta_priv;
788
789 rcu_read_lock();
790 sta = ieee80211_find_sta(ctx->vif, addr1);
791 if (sta) {
792 sta_priv = (void *)sta->drv_priv;
793 /* avoid atomic ops if this isn't a client */
794 if (sta_priv->client &&
795 atomic_dec_return(&sta_priv->pending_frames) == 0)
796 ieee80211_sta_block_awake(priv->hw, sta, false);
797 }
798 rcu_read_unlock();
799 }
800
801 /**
802 * translate ucode response to mac80211 tx status control values
803 */
804 static void iwlagn_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
805 struct ieee80211_tx_info *info)
806 {
807 struct ieee80211_tx_rate *r = &info->status.rates[0];
808
809 info->status.antenna =
810 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
811 if (rate_n_flags & RATE_MCS_HT_MSK)
812 r->flags |= IEEE80211_TX_RC_MCS;
813 if (rate_n_flags & RATE_MCS_GF_MSK)
814 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
815 if (rate_n_flags & RATE_MCS_HT40_MSK)
816 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
817 if (rate_n_flags & RATE_MCS_DUP_MSK)
818 r->flags |= IEEE80211_TX_RC_DUP_DATA;
819 if (rate_n_flags & RATE_MCS_SGI_MSK)
820 r->flags |= IEEE80211_TX_RC_SHORT_GI;
821 r->idx = iwlagn_hwrate_to_mac80211_idx(rate_n_flags, info->band);
822 }
823
824 #ifdef CONFIG_IWLWIFI_DEBUG
825 const char *iwl_get_tx_fail_reason(u32 status)
826 {
827 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
828 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
829
830 switch (status & TX_STATUS_MSK) {
831 case TX_STATUS_SUCCESS:
832 return "SUCCESS";
833 TX_STATUS_POSTPONE(DELAY);
834 TX_STATUS_POSTPONE(FEW_BYTES);
835 TX_STATUS_POSTPONE(BT_PRIO);
836 TX_STATUS_POSTPONE(QUIET_PERIOD);
837 TX_STATUS_POSTPONE(CALC_TTAK);
838 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
839 TX_STATUS_FAIL(SHORT_LIMIT);
840 TX_STATUS_FAIL(LONG_LIMIT);
841 TX_STATUS_FAIL(FIFO_UNDERRUN);
842 TX_STATUS_FAIL(DRAIN_FLOW);
843 TX_STATUS_FAIL(RFKILL_FLUSH);
844 TX_STATUS_FAIL(LIFE_EXPIRE);
845 TX_STATUS_FAIL(DEST_PS);
846 TX_STATUS_FAIL(HOST_ABORTED);
847 TX_STATUS_FAIL(BT_RETRY);
848 TX_STATUS_FAIL(STA_INVALID);
849 TX_STATUS_FAIL(FRAG_DROPPED);
850 TX_STATUS_FAIL(TID_DISABLE);
851 TX_STATUS_FAIL(FIFO_FLUSHED);
852 TX_STATUS_FAIL(INSUFFICIENT_CF_POLL);
853 TX_STATUS_FAIL(PASSIVE_NO_RX);
854 TX_STATUS_FAIL(NO_BEACON_ON_RADAR);
855 }
856
857 return "UNKNOWN";
858
859 #undef TX_STATUS_FAIL
860 #undef TX_STATUS_POSTPONE
861 }
862 #endif /* CONFIG_IWLWIFI_DEBUG */
863
864 static void iwlagn_count_agg_tx_err_status(struct iwl_priv *priv, u16 status)
865 {
866 status &= AGG_TX_STATUS_MSK;
867
868 switch (status) {
869 case AGG_TX_STATE_UNDERRUN_MSK:
870 priv->reply_agg_tx_stats.underrun++;
871 break;
872 case AGG_TX_STATE_BT_PRIO_MSK:
873 priv->reply_agg_tx_stats.bt_prio++;
874 break;
875 case AGG_TX_STATE_FEW_BYTES_MSK:
876 priv->reply_agg_tx_stats.few_bytes++;
877 break;
878 case AGG_TX_STATE_ABORT_MSK:
879 priv->reply_agg_tx_stats.abort++;
880 break;
881 case AGG_TX_STATE_LAST_SENT_TTL_MSK:
882 priv->reply_agg_tx_stats.last_sent_ttl++;
883 break;
884 case AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK:
885 priv->reply_agg_tx_stats.last_sent_try++;
886 break;
887 case AGG_TX_STATE_LAST_SENT_BT_KILL_MSK:
888 priv->reply_agg_tx_stats.last_sent_bt_kill++;
889 break;
890 case AGG_TX_STATE_SCD_QUERY_MSK:
891 priv->reply_agg_tx_stats.scd_query++;
892 break;
893 case AGG_TX_STATE_TEST_BAD_CRC32_MSK:
894 priv->reply_agg_tx_stats.bad_crc32++;
895 break;
896 case AGG_TX_STATE_RESPONSE_MSK:
897 priv->reply_agg_tx_stats.response++;
898 break;
899 case AGG_TX_STATE_DUMP_TX_MSK:
900 priv->reply_agg_tx_stats.dump_tx++;
901 break;
902 case AGG_TX_STATE_DELAY_TX_MSK:
903 priv->reply_agg_tx_stats.delay_tx++;
904 break;
905 default:
906 priv->reply_agg_tx_stats.unknown++;
907 break;
908 }
909 }
910
911 static void iwl_rx_reply_tx_agg(struct iwl_priv *priv,
912 struct iwlagn_tx_resp *tx_resp)
913 {
914 struct agg_tx_status *frame_status = &tx_resp->status;
915 int tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
916 IWLAGN_TX_RES_TID_POS;
917 int sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
918 IWLAGN_TX_RES_RA_POS;
919 struct iwl_ht_agg *agg = &priv->tid_data[sta_id][tid].agg;
920 u32 status = le16_to_cpu(tx_resp->status.status);
921 int i;
922
923 WARN_ON(tid == IWL_TID_NON_QOS);
924
925 if (agg->wait_for_ba)
926 IWL_DEBUG_TX_REPLY(priv,
927 "got tx response w/o block-ack\n");
928
929 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
930 agg->wait_for_ba = (tx_resp->frame_count > 1);
931
932 /*
933 * If the BT kill count is non-zero, we'll get this
934 * notification again.
935 */
936 if (tx_resp->bt_kill_count && tx_resp->frame_count == 1 &&
937 priv->cfg->bt_params &&
938 priv->cfg->bt_params->advanced_bt_coexist) {
939 IWL_DEBUG_COEX(priv, "receive reply tx w/ bt_kill\n");
940 }
941
942 if (tx_resp->frame_count == 1)
943 return;
944
945 /* Construct bit-map of pending frames within Tx window */
946 for (i = 0; i < tx_resp->frame_count; i++) {
947 u16 fstatus = le16_to_cpu(frame_status[i].status);
948
949 if (status & AGG_TX_STATUS_MSK)
950 iwlagn_count_agg_tx_err_status(priv, fstatus);
951
952 if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
953 AGG_TX_STATE_ABORT_MSK))
954 continue;
955 }
956 }
957
958 #ifdef CONFIG_IWLWIFI_DEBUG
959 #define AGG_TX_STATE_FAIL(x) case AGG_TX_STATE_ ## x: return #x
960
961 const char *iwl_get_agg_tx_fail_reason(u16 status)
962 {
963 status &= AGG_TX_STATUS_MSK;
964 switch (status) {
965 case AGG_TX_STATE_TRANSMITTED:
966 return "SUCCESS";
967 AGG_TX_STATE_FAIL(UNDERRUN_MSK);
968 AGG_TX_STATE_FAIL(BT_PRIO_MSK);
969 AGG_TX_STATE_FAIL(FEW_BYTES_MSK);
970 AGG_TX_STATE_FAIL(ABORT_MSK);
971 AGG_TX_STATE_FAIL(LAST_SENT_TTL_MSK);
972 AGG_TX_STATE_FAIL(LAST_SENT_TRY_CNT_MSK);
973 AGG_TX_STATE_FAIL(LAST_SENT_BT_KILL_MSK);
974 AGG_TX_STATE_FAIL(SCD_QUERY_MSK);
975 AGG_TX_STATE_FAIL(TEST_BAD_CRC32_MSK);
976 AGG_TX_STATE_FAIL(RESPONSE_MSK);
977 AGG_TX_STATE_FAIL(DUMP_TX_MSK);
978 AGG_TX_STATE_FAIL(DELAY_TX_MSK);
979 }
980
981 return "UNKNOWN";
982 }
983 #endif /* CONFIG_IWLWIFI_DEBUG */
984
985 static inline u32 iwlagn_get_scd_ssn(struct iwlagn_tx_resp *tx_resp)
986 {
987 return le32_to_cpup((__le32 *)&tx_resp->status +
988 tx_resp->frame_count) & MAX_SN;
989 }
990
991 static void iwlagn_count_tx_err_status(struct iwl_priv *priv, u16 status)
992 {
993 status &= TX_STATUS_MSK;
994
995 switch (status) {
996 case TX_STATUS_POSTPONE_DELAY:
997 priv->reply_tx_stats.pp_delay++;
998 break;
999 case TX_STATUS_POSTPONE_FEW_BYTES:
1000 priv->reply_tx_stats.pp_few_bytes++;
1001 break;
1002 case TX_STATUS_POSTPONE_BT_PRIO:
1003 priv->reply_tx_stats.pp_bt_prio++;
1004 break;
1005 case TX_STATUS_POSTPONE_QUIET_PERIOD:
1006 priv->reply_tx_stats.pp_quiet_period++;
1007 break;
1008 case TX_STATUS_POSTPONE_CALC_TTAK:
1009 priv->reply_tx_stats.pp_calc_ttak++;
1010 break;
1011 case TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY:
1012 priv->reply_tx_stats.int_crossed_retry++;
1013 break;
1014 case TX_STATUS_FAIL_SHORT_LIMIT:
1015 priv->reply_tx_stats.short_limit++;
1016 break;
1017 case TX_STATUS_FAIL_LONG_LIMIT:
1018 priv->reply_tx_stats.long_limit++;
1019 break;
1020 case TX_STATUS_FAIL_FIFO_UNDERRUN:
1021 priv->reply_tx_stats.fifo_underrun++;
1022 break;
1023 case TX_STATUS_FAIL_DRAIN_FLOW:
1024 priv->reply_tx_stats.drain_flow++;
1025 break;
1026 case TX_STATUS_FAIL_RFKILL_FLUSH:
1027 priv->reply_tx_stats.rfkill_flush++;
1028 break;
1029 case TX_STATUS_FAIL_LIFE_EXPIRE:
1030 priv->reply_tx_stats.life_expire++;
1031 break;
1032 case TX_STATUS_FAIL_DEST_PS:
1033 priv->reply_tx_stats.dest_ps++;
1034 break;
1035 case TX_STATUS_FAIL_HOST_ABORTED:
1036 priv->reply_tx_stats.host_abort++;
1037 break;
1038 case TX_STATUS_FAIL_BT_RETRY:
1039 priv->reply_tx_stats.bt_retry++;
1040 break;
1041 case TX_STATUS_FAIL_STA_INVALID:
1042 priv->reply_tx_stats.sta_invalid++;
1043 break;
1044 case TX_STATUS_FAIL_FRAG_DROPPED:
1045 priv->reply_tx_stats.frag_drop++;
1046 break;
1047 case TX_STATUS_FAIL_TID_DISABLE:
1048 priv->reply_tx_stats.tid_disable++;
1049 break;
1050 case TX_STATUS_FAIL_FIFO_FLUSHED:
1051 priv->reply_tx_stats.fifo_flush++;
1052 break;
1053 case TX_STATUS_FAIL_INSUFFICIENT_CF_POLL:
1054 priv->reply_tx_stats.insuff_cf_poll++;
1055 break;
1056 case TX_STATUS_FAIL_PASSIVE_NO_RX:
1057 priv->reply_tx_stats.fail_hw_drop++;
1058 break;
1059 case TX_STATUS_FAIL_NO_BEACON_ON_RADAR:
1060 priv->reply_tx_stats.sta_color_mismatch++;
1061 break;
1062 default:
1063 priv->reply_tx_stats.unknown++;
1064 break;
1065 }
1066 }
1067
1068 static void iwlagn_set_tx_status(struct iwl_priv *priv,
1069 struct ieee80211_tx_info *info,
1070 struct iwlagn_tx_resp *tx_resp)
1071 {
1072 u16 status = le16_to_cpu(tx_resp->status.status);
1073
1074 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1075
1076 info->status.rates[0].count = tx_resp->failure_frame + 1;
1077 info->flags |= iwl_tx_status_to_mac80211(status);
1078 iwlagn_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
1079 info);
1080 if (!iwl_is_tx_success(status))
1081 iwlagn_count_tx_err_status(priv, status);
1082 }
1083
1084 static void iwl_check_abort_status(struct iwl_priv *priv,
1085 u8 frame_count, u32 status)
1086 {
1087 if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) {
1088 IWL_ERR(priv, "Tx flush command to flush out all frames\n");
1089 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
1090 queue_work(priv->workqueue, &priv->tx_flush);
1091 }
1092 }
1093
1094 int iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb,
1095 struct iwl_device_cmd *cmd)
1096 {
1097 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1098 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1099 int txq_id = SEQ_TO_QUEUE(sequence);
1100 int cmd_index __maybe_unused = SEQ_TO_INDEX(sequence);
1101 struct iwlagn_tx_resp *tx_resp = (void *)pkt->data;
1102 struct ieee80211_hdr *hdr;
1103 u32 status = le16_to_cpu(tx_resp->status.status);
1104 u16 ssn = iwlagn_get_scd_ssn(tx_resp);
1105 int tid;
1106 int sta_id;
1107 int freed;
1108 struct ieee80211_tx_info *info;
1109 struct sk_buff_head skbs;
1110 struct sk_buff *skb;
1111 struct iwl_rxon_context *ctx;
1112 bool is_agg = (txq_id >= IWLAGN_FIRST_AMPDU_QUEUE);
1113 bool is_offchannel_skb;
1114
1115 tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
1116 IWLAGN_TX_RES_TID_POS;
1117 sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
1118 IWLAGN_TX_RES_RA_POS;
1119
1120 spin_lock_bh(&priv->sta_lock);
1121
1122 if (is_agg)
1123 iwl_rx_reply_tx_agg(priv, tx_resp);
1124
1125 __skb_queue_head_init(&skbs);
1126
1127 is_offchannel_skb = false;
1128
1129 if (tx_resp->frame_count == 1) {
1130 u16 next_reclaimed = le16_to_cpu(tx_resp->seq_ctl);
1131 next_reclaimed = SEQ_TO_SN(next_reclaimed + 0x10);
1132
1133 if (is_agg) {
1134 /* If this is an aggregation queue, we can rely on the
1135 * ssn since the wifi sequence number corresponds to
1136 * the index in the TFD ring (%256).
1137 * The seq_ctl is the sequence control of the packet
1138 * to which this Tx response relates. But if there is a
1139 * hole in the bitmap of the BA we received, this Tx
1140 * response may allow to reclaim the hole and all the
1141 * subsequent packets that were already acked.
1142 * In that case, seq_ctl != ssn, and the next packet
1143 * to be reclaimed will be ssn and not seq_ctl.
1144 */
1145 next_reclaimed = ssn;
1146 }
1147
1148 iwl_trans_reclaim(priv->trans, txq_id, ssn, &skbs);
1149
1150 iwlagn_check_ratid_empty(priv, sta_id, tid);
1151 freed = 0;
1152
1153 /* process frames */
1154 skb_queue_walk(&skbs, skb) {
1155 hdr = (struct ieee80211_hdr *)skb->data;
1156
1157 if (!ieee80211_is_data_qos(hdr->frame_control))
1158 priv->last_seq_ctl = tx_resp->seq_ctl;
1159
1160 info = IEEE80211_SKB_CB(skb);
1161 ctx = info->driver_data[0];
1162 iwl_trans_free_tx_cmd(priv->trans,
1163 info->driver_data[1]);
1164
1165 memset(&info->status, 0, sizeof(info->status));
1166
1167 if (status == TX_STATUS_FAIL_PASSIVE_NO_RX &&
1168 iwl_is_associated_ctx(ctx) && ctx->vif &&
1169 ctx->vif->type == NL80211_IFTYPE_STATION) {
1170 /* block and stop all queues */
1171 priv->passive_no_rx = true;
1172 IWL_DEBUG_TX_QUEUES(priv, "stop all queues: "
1173 "passive channel");
1174 ieee80211_stop_queues(priv->hw);
1175
1176 IWL_DEBUG_TX_REPLY(priv,
1177 "TXQ %d status %s (0x%08x) "
1178 "rate_n_flags 0x%x retries %d\n",
1179 txq_id,
1180 iwl_get_tx_fail_reason(status),
1181 status,
1182 le32_to_cpu(tx_resp->rate_n_flags),
1183 tx_resp->failure_frame);
1184
1185 IWL_DEBUG_TX_REPLY(priv,
1186 "FrameCnt = %d, idx=%d\n",
1187 tx_resp->frame_count, cmd_index);
1188 }
1189
1190 /* check if BAR is needed */
1191 if (is_agg && !iwl_is_tx_success(status))
1192 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1193 iwlagn_set_tx_status(priv, IEEE80211_SKB_CB(skb),
1194 tx_resp);
1195 if (!is_agg)
1196 iwlagn_non_agg_tx_status(priv, ctx, hdr->addr1);
1197
1198 /*
1199 * W/A for FW bug - the seq_ctl isn't updated when the
1200 * queues are flushed. Fetch it from the packet itself
1201 */
1202 if (!is_agg && status == TX_STATUS_FAIL_FIFO_FLUSHED) {
1203 next_reclaimed = le16_to_cpu(hdr->seq_ctrl);
1204 next_reclaimed =
1205 SEQ_TO_SN(next_reclaimed + 0x10);
1206 }
1207
1208 is_offchannel_skb =
1209 (info->flags & IEEE80211_TX_CTL_TX_OFFCHAN);
1210 freed++;
1211 }
1212
1213 if (tid != IWL_TID_NON_QOS) {
1214 priv->tid_data[sta_id][tid].next_reclaimed =
1215 next_reclaimed;
1216 IWL_DEBUG_TX_REPLY(priv, "Next reclaimed packet:%d\n",
1217 next_reclaimed);
1218 }
1219
1220 if (!is_agg && freed != 1)
1221 IWL_ERR(priv, "Q: %d, freed %d\n", txq_id, freed);
1222
1223 /*
1224 * An offchannel frame can be send only on the AUX queue, where
1225 * there is no aggregation (and reordering) so it only is single
1226 * skb is expected to be processed.
1227 */
1228 if (is_offchannel_skb && freed != 1)
1229 IWL_ERR(priv, "OFFCHANNEL SKB freed %d\n", freed);
1230 }
1231
1232 IWL_DEBUG_TX_REPLY(priv, "TXQ %d status %s (0x%08x)\n", txq_id,
1233 iwl_get_tx_fail_reason(status), status);
1234
1235 IWL_DEBUG_TX_REPLY(priv,
1236 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d seq_ctl=0x%x\n",
1237 le32_to_cpu(tx_resp->rate_n_flags),
1238 tx_resp->failure_frame, SEQ_TO_INDEX(sequence), ssn,
1239 le16_to_cpu(tx_resp->seq_ctl));
1240
1241 iwl_check_abort_status(priv, tx_resp->frame_count, status);
1242 spin_unlock_bh(&priv->sta_lock);
1243
1244 while (!skb_queue_empty(&skbs)) {
1245 skb = __skb_dequeue(&skbs);
1246 ieee80211_tx_status_ni(priv->hw, skb);
1247 }
1248
1249 if (is_offchannel_skb)
1250 iwl_scan_offchannel_skb_status(priv);
1251
1252 return 0;
1253 }
1254
1255 /**
1256 * iwlagn_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
1257 *
1258 * Handles block-acknowledge notification from device, which reports success
1259 * of frames sent via aggregation.
1260 */
1261 int iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv,
1262 struct iwl_rx_cmd_buffer *rxb,
1263 struct iwl_device_cmd *cmd)
1264 {
1265 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1266 struct iwl_compressed_ba_resp *ba_resp = (void *)pkt->data;
1267 struct iwl_ht_agg *agg;
1268 struct sk_buff_head reclaimed_skbs;
1269 struct ieee80211_tx_info *info;
1270 struct ieee80211_hdr *hdr;
1271 struct sk_buff *skb;
1272 int sta_id;
1273 int tid;
1274 int freed;
1275
1276 /* "flow" corresponds to Tx queue */
1277 u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
1278
1279 /* "ssn" is start of block-ack Tx window, corresponds to index
1280 * (in Tx queue's circular buffer) of first TFD/frame in window */
1281 u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
1282
1283 if (scd_flow >= priv->cfg->base_params->num_of_queues) {
1284 IWL_ERR(priv,
1285 "BUG_ON scd_flow is bigger than number of queues\n");
1286 return 0;
1287 }
1288
1289 sta_id = ba_resp->sta_id;
1290 tid = ba_resp->tid;
1291 agg = &priv->tid_data[sta_id][tid].agg;
1292
1293 spin_lock_bh(&priv->sta_lock);
1294
1295 if (unlikely(!agg->wait_for_ba)) {
1296 if (unlikely(ba_resp->bitmap))
1297 IWL_ERR(priv, "Received BA when not expected\n");
1298 spin_unlock_bh(&priv->sta_lock);
1299 return 0;
1300 }
1301
1302 if (unlikely(scd_flow != agg->txq_id)) {
1303 /*
1304 * FIXME: this is a uCode bug which need to be addressed,
1305 * log the information and return for now.
1306 * Since it is can possibly happen very often and in order
1307 * not to fill the syslog, don't use IWL_ERR or IWL_WARN
1308 */
1309 IWL_DEBUG_TX_QUEUES(priv,
1310 "Bad queue mapping txq_id=%d, agg_txq[sta:%d,tid:%d]=%d\n",
1311 scd_flow, sta_id, tid, agg->txq_id);
1312 spin_unlock_bh(&priv->sta_lock);
1313 return 0;
1314 }
1315
1316 __skb_queue_head_init(&reclaimed_skbs);
1317
1318 /* Release all TFDs before the SSN, i.e. all TFDs in front of
1319 * block-ack window (we assume that they've been successfully
1320 * transmitted ... if not, it's too late anyway). */
1321 iwl_trans_reclaim(priv->trans, scd_flow, ba_resp_scd_ssn,
1322 &reclaimed_skbs);
1323
1324 IWL_DEBUG_TX_REPLY(priv, "REPLY_COMPRESSED_BA [%d] Received from %pM, "
1325 "sta_id = %d\n",
1326 agg->wait_for_ba,
1327 (u8 *) &ba_resp->sta_addr_lo32,
1328 ba_resp->sta_id);
1329 IWL_DEBUG_TX_REPLY(priv, "TID = %d, SeqCtl = %d, bitmap = 0x%llx, "
1330 "scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
1331 ba_resp->tid, le16_to_cpu(ba_resp->seq_ctl),
1332 (unsigned long long)le64_to_cpu(ba_resp->bitmap),
1333 scd_flow, ba_resp_scd_ssn, ba_resp->txed,
1334 ba_resp->txed_2_done);
1335
1336 /* Mark that the expected block-ack response arrived */
1337 agg->wait_for_ba = false;
1338
1339 /* Sanity check values reported by uCode */
1340 if (ba_resp->txed_2_done > ba_resp->txed) {
1341 IWL_DEBUG_TX_REPLY(priv,
1342 "bogus sent(%d) and ack(%d) count\n",
1343 ba_resp->txed, ba_resp->txed_2_done);
1344 /*
1345 * set txed_2_done = txed,
1346 * so it won't impact rate scale
1347 */
1348 ba_resp->txed = ba_resp->txed_2_done;
1349 }
1350
1351 priv->tid_data[sta_id][tid].next_reclaimed = ba_resp_scd_ssn;
1352
1353 iwlagn_check_ratid_empty(priv, sta_id, tid);
1354 freed = 0;
1355
1356 skb_queue_walk(&reclaimed_skbs, skb) {
1357 hdr = (struct ieee80211_hdr *)skb->data;
1358
1359 if (ieee80211_is_data_qos(hdr->frame_control))
1360 freed++;
1361 else
1362 WARN_ON_ONCE(1);
1363
1364 info = IEEE80211_SKB_CB(skb);
1365 iwl_trans_free_tx_cmd(priv->trans, info->driver_data[1]);
1366
1367 if (freed == 1) {
1368 /* this is the first skb we deliver in this batch */
1369 /* put the rate scaling data there */
1370 info = IEEE80211_SKB_CB(skb);
1371 memset(&info->status, 0, sizeof(info->status));
1372 info->flags |= IEEE80211_TX_STAT_ACK;
1373 info->flags |= IEEE80211_TX_STAT_AMPDU;
1374 info->status.ampdu_ack_len = ba_resp->txed_2_done;
1375 info->status.ampdu_len = ba_resp->txed;
1376 iwlagn_hwrate_to_tx_control(priv, agg->rate_n_flags,
1377 info);
1378 }
1379 }
1380
1381 spin_unlock_bh(&priv->sta_lock);
1382
1383 while (!skb_queue_empty(&reclaimed_skbs)) {
1384 skb = __skb_dequeue(&reclaimed_skbs);
1385 ieee80211_tx_status_ni(priv->hw, skb);
1386 }
1387
1388 return 0;
1389 }
Linux kernel - Deliverables
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