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iwlwifi: silently ignore fw flaws in Tx path
[deliverable/linux.git] / drivers / net / wireless / iwlwifi / dvm / 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 #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 IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n");
235 break;
236
237 case WLAN_CIPHER_SUITE_TKIP:
238 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
239 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
240 IWL_DEBUG_TX(priv, "tx_cmd with tkip hwcrypto\n");
241 break;
242
243 case WLAN_CIPHER_SUITE_WEP104:
244 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
245 /* fall through */
246 case WLAN_CIPHER_SUITE_WEP40:
247 tx_cmd->sec_ctl |= (TX_CMD_SEC_WEP |
248 (keyconf->keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT);
249
250 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
251
252 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
253 "with key %d\n", keyconf->keyidx);
254 break;
255
256 default:
257 IWL_ERR(priv, "Unknown encode cipher %x\n", keyconf->cipher);
258 break;
259 }
260 }
261
262 /**
263 * iwl_sta_id_or_broadcast - return sta_id or broadcast sta
264 * @context: the current context
265 * @sta: mac80211 station
266 *
267 * In certain circumstances mac80211 passes a station pointer
268 * that may be %NULL, for example during TX or key setup. In
269 * that case, we need to use the broadcast station, so this
270 * inline wraps that pattern.
271 */
272 static int iwl_sta_id_or_broadcast(struct iwl_rxon_context *context,
273 struct ieee80211_sta *sta)
274 {
275 int sta_id;
276
277 if (!sta)
278 return context->bcast_sta_id;
279
280 sta_id = iwl_sta_id(sta);
281
282 /*
283 * mac80211 should not be passing a partially
284 * initialised station!
285 */
286 WARN_ON(sta_id == IWL_INVALID_STATION);
287
288 return sta_id;
289 }
290
291 /*
292 * start REPLY_TX command process
293 */
294 int iwlagn_tx_skb(struct iwl_priv *priv,
295 struct ieee80211_sta *sta,
296 struct sk_buff *skb)
297 {
298 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
299 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
300 struct iwl_station_priv *sta_priv = NULL;
301 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
302 struct iwl_device_cmd *dev_cmd;
303 struct iwl_tx_cmd *tx_cmd;
304 __le16 fc;
305 u8 hdr_len;
306 u16 len, seq_number = 0;
307 u8 sta_id, tid = IWL_MAX_TID_COUNT;
308 bool is_agg = false, is_data_qos = false;
309 int txq_id;
310
311 if (info->control.vif)
312 ctx = iwl_rxon_ctx_from_vif(info->control.vif);
313
314 if (iwl_is_rfkill(priv)) {
315 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
316 goto drop_unlock_priv;
317 }
318
319 fc = hdr->frame_control;
320
321 #ifdef CONFIG_IWLWIFI_DEBUG
322 if (ieee80211_is_auth(fc))
323 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
324 else if (ieee80211_is_assoc_req(fc))
325 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
326 else if (ieee80211_is_reassoc_req(fc))
327 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
328 #endif
329
330 if (unlikely(ieee80211_is_probe_resp(fc))) {
331 struct iwl_wipan_noa_data *noa_data =
332 rcu_dereference(priv->noa_data);
333
334 if (noa_data &&
335 pskb_expand_head(skb, 0, noa_data->length,
336 GFP_ATOMIC) == 0) {
337 memcpy(skb_put(skb, noa_data->length),
338 noa_data->data, noa_data->length);
339 hdr = (struct ieee80211_hdr *)skb->data;
340 }
341 }
342
343 hdr_len = ieee80211_hdrlen(fc);
344
345 /* For management frames use broadcast id to do not break aggregation */
346 if (!ieee80211_is_data(fc))
347 sta_id = ctx->bcast_sta_id;
348 else {
349 /* Find index into station table for destination station */
350 sta_id = iwl_sta_id_or_broadcast(ctx, sta);
351 if (sta_id == IWL_INVALID_STATION) {
352 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
353 hdr->addr1);
354 goto drop_unlock_priv;
355 }
356 }
357
358 IWL_DEBUG_TX(priv, "station Id %d\n", sta_id);
359
360 if (sta)
361 sta_priv = (void *)sta->drv_priv;
362
363 if (sta_priv && sta_priv->asleep &&
364 (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER)) {
365 /*
366 * This sends an asynchronous command to the device,
367 * but we can rely on it being processed before the
368 * next frame is processed -- and the next frame to
369 * this station is the one that will consume this
370 * counter.
371 * For now set the counter to just 1 since we do not
372 * support uAPSD yet.
373 *
374 * FIXME: If we get two non-bufferable frames one
375 * after the other, we might only send out one of
376 * them because this is racy.
377 */
378 iwl_sta_modify_sleep_tx_count(priv, sta_id, 1);
379 }
380
381 dev_cmd = iwl_trans_alloc_tx_cmd(priv->trans);
382
383 if (unlikely(!dev_cmd))
384 goto drop_unlock_priv;
385
386 memset(dev_cmd, 0, sizeof(*dev_cmd));
387 tx_cmd = (struct iwl_tx_cmd *) dev_cmd->payload;
388
389 /* Total # bytes to be transmitted */
390 len = (u16)skb->len;
391 tx_cmd->len = cpu_to_le16(len);
392
393 if (info->control.hw_key)
394 iwlagn_tx_cmd_build_hwcrypto(priv, info, tx_cmd, skb);
395
396 /* TODO need this for burst mode later on */
397 iwlagn_tx_cmd_build_basic(priv, skb, tx_cmd, info, hdr, sta_id);
398
399 iwlagn_tx_cmd_build_rate(priv, tx_cmd, info, sta, fc);
400
401 memset(&info->status, 0, sizeof(info->status));
402
403 info->driver_data[0] = ctx;
404 info->driver_data[1] = dev_cmd;
405 /* From now on, we cannot access info->control */
406
407 spin_lock(&priv->sta_lock);
408
409 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
410 u8 *qc = NULL;
411 struct iwl_tid_data *tid_data;
412 qc = ieee80211_get_qos_ctl(hdr);
413 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
414 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
415 goto drop_unlock_sta;
416 tid_data = &priv->tid_data[sta_id][tid];
417
418 /* aggregation is on for this <sta,tid> */
419 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
420 tid_data->agg.state != IWL_AGG_ON) {
421 IWL_ERR(priv, "TX_CTL_AMPDU while not in AGG:"
422 " Tx flags = 0x%08x, agg.state = %d",
423 info->flags, tid_data->agg.state);
424 IWL_ERR(priv, "sta_id = %d, tid = %d seq_num = %d",
425 sta_id, tid, SEQ_TO_SN(tid_data->seq_number));
426 goto drop_unlock_sta;
427 }
428
429 /* We can receive packets from the stack in IWL_AGG_{ON,OFF}
430 * only. Check this here.
431 */
432 if (WARN_ONCE(tid_data->agg.state != IWL_AGG_ON &&
433 tid_data->agg.state != IWL_AGG_OFF,
434 "Tx while agg.state = %d", tid_data->agg.state))
435 goto drop_unlock_sta;
436
437 seq_number = tid_data->seq_number;
438 seq_number &= IEEE80211_SCTL_SEQ;
439 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
440 hdr->seq_ctrl |= cpu_to_le16(seq_number);
441 seq_number += 0x10;
442
443 if (info->flags & IEEE80211_TX_CTL_AMPDU)
444 is_agg = true;
445 is_data_qos = true;
446 }
447
448 /* Copy MAC header from skb into command buffer */
449 memcpy(tx_cmd->hdr, hdr, hdr_len);
450
451 if (is_agg)
452 txq_id = priv->tid_data[sta_id][tid].agg.txq_id;
453 else if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) {
454 /*
455 * Send this frame after DTIM -- there's a special queue
456 * reserved for this for contexts that support AP mode.
457 */
458 txq_id = ctx->mcast_queue;
459
460 /*
461 * The microcode will clear the more data
462 * bit in the last frame it transmits.
463 */
464 hdr->frame_control |=
465 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
466 } else if (info->flags & IEEE80211_TX_CTL_TX_OFFCHAN)
467 txq_id = IWL_AUX_QUEUE;
468 else
469 txq_id = ctx->ac_to_queue[skb_get_queue_mapping(skb)];
470
471 WARN_ON_ONCE(!is_agg && txq_id != info->hw_queue);
472 WARN_ON_ONCE(is_agg &&
473 priv->queue_to_mac80211[txq_id] != info->hw_queue);
474
475 if (iwl_trans_tx(priv->trans, skb, dev_cmd, txq_id))
476 goto drop_unlock_sta;
477
478 if (is_data_qos && !ieee80211_has_morefrags(fc))
479 priv->tid_data[sta_id][tid].seq_number = seq_number;
480
481 spin_unlock(&priv->sta_lock);
482
483 /*
484 * Avoid atomic ops if it isn't an associated client.
485 * Also, if this is a packet for aggregation, don't
486 * increase the counter because the ucode will stop
487 * aggregation queues when their respective station
488 * goes to sleep.
489 */
490 if (sta_priv && sta_priv->client && !is_agg)
491 atomic_inc(&sta_priv->pending_frames);
492
493 if (info->flags & IEEE80211_TX_CTL_TX_OFFCHAN)
494 iwl_scan_offchannel_skb(priv);
495
496 return 0;
497
498 drop_unlock_sta:
499 if (dev_cmd)
500 iwl_trans_free_tx_cmd(priv->trans, dev_cmd);
501 spin_unlock(&priv->sta_lock);
502 drop_unlock_priv:
503 return -1;
504 }
505
506 static int iwlagn_alloc_agg_txq(struct iwl_priv *priv, int mq)
507 {
508 int q;
509
510 for (q = IWLAGN_FIRST_AMPDU_QUEUE;
511 q < priv->cfg->base_params->num_of_queues; q++) {
512 if (!test_and_set_bit(q, priv->agg_q_alloc)) {
513 priv->queue_to_mac80211[q] = mq;
514 return q;
515 }
516 }
517
518 return -ENOSPC;
519 }
520
521 static void iwlagn_dealloc_agg_txq(struct iwl_priv *priv, int q)
522 {
523 clear_bit(q, priv->agg_q_alloc);
524 priv->queue_to_mac80211[q] = IWL_INVALID_MAC80211_QUEUE;
525 }
526
527 int iwlagn_tx_agg_stop(struct iwl_priv *priv, struct ieee80211_vif *vif,
528 struct ieee80211_sta *sta, u16 tid)
529 {
530 struct iwl_tid_data *tid_data;
531 int sta_id, txq_id;
532 enum iwl_agg_state agg_state;
533
534 sta_id = iwl_sta_id(sta);
535
536 if (sta_id == IWL_INVALID_STATION) {
537 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
538 return -ENXIO;
539 }
540
541 spin_lock_bh(&priv->sta_lock);
542
543 tid_data = &priv->tid_data[sta_id][tid];
544 txq_id = priv->tid_data[sta_id][tid].agg.txq_id;
545
546 switch (priv->tid_data[sta_id][tid].agg.state) {
547 case IWL_EMPTYING_HW_QUEUE_ADDBA:
548 /*
549 * This can happen if the peer stops aggregation
550 * again before we've had a chance to drain the
551 * queue we selected previously, i.e. before the
552 * session was really started completely.
553 */
554 IWL_DEBUG_HT(priv, "AGG stop before setup done\n");
555 goto turn_off;
556 case IWL_AGG_STARTING:
557 /*
558 * This can happen when the session is stopped before
559 * we receive ADDBA response
560 */
561 IWL_DEBUG_HT(priv, "AGG stop before AGG became operational\n");
562 goto turn_off;
563 case IWL_AGG_ON:
564 break;
565 default:
566 IWL_WARN(priv, "Stopping AGG while state not ON "
567 "or starting for %d on %d (%d)\n", sta_id, tid,
568 priv->tid_data[sta_id][tid].agg.state);
569 spin_unlock_bh(&priv->sta_lock);
570 return 0;
571 }
572
573 tid_data->agg.ssn = SEQ_TO_SN(tid_data->seq_number);
574
575 /* There are still packets for this RA / TID in the HW */
576 if (!test_bit(txq_id, priv->agg_q_alloc)) {
577 IWL_DEBUG_TX_QUEUES(priv,
578 "stopping AGG on STA/TID %d/%d but hwq %d not used\n",
579 sta_id, tid, txq_id);
580 } else if (tid_data->agg.ssn != tid_data->next_reclaimed) {
581 IWL_DEBUG_TX_QUEUES(priv, "Can't proceed: ssn %d, "
582 "next_recl = %d\n",
583 tid_data->agg.ssn,
584 tid_data->next_reclaimed);
585 priv->tid_data[sta_id][tid].agg.state =
586 IWL_EMPTYING_HW_QUEUE_DELBA;
587 spin_unlock_bh(&priv->sta_lock);
588 return 0;
589 }
590
591 IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d\n",
592 tid_data->agg.ssn);
593 turn_off:
594 agg_state = priv->tid_data[sta_id][tid].agg.state;
595 priv->tid_data[sta_id][tid].agg.state = IWL_AGG_OFF;
596
597 spin_unlock_bh(&priv->sta_lock);
598
599 if (test_bit(txq_id, priv->agg_q_alloc)) {
600 /*
601 * If the transport didn't know that we wanted to start
602 * agreggation, don't tell it that we want to stop them.
603 * This can happen when we don't get the addBA response on
604 * time, or we hadn't time to drain the AC queues.
605 */
606 if (agg_state == IWL_AGG_ON)
607 iwl_trans_txq_disable(priv->trans, txq_id);
608 else
609 IWL_DEBUG_TX_QUEUES(priv, "Don't disable tx agg: %d\n",
610 agg_state);
611 iwlagn_dealloc_agg_txq(priv, txq_id);
612 }
613
614 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
615
616 return 0;
617 }
618
619 int iwlagn_tx_agg_start(struct iwl_priv *priv, struct ieee80211_vif *vif,
620 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
621 {
622 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
623 struct iwl_tid_data *tid_data;
624 int sta_id, txq_id, ret;
625
626 IWL_DEBUG_HT(priv, "TX AGG request on ra = %pM tid = %d\n",
627 sta->addr, tid);
628
629 sta_id = iwl_sta_id(sta);
630 if (sta_id == IWL_INVALID_STATION) {
631 IWL_ERR(priv, "Start AGG on invalid station\n");
632 return -ENXIO;
633 }
634 if (unlikely(tid >= IWL_MAX_TID_COUNT))
635 return -EINVAL;
636
637 if (priv->tid_data[sta_id][tid].agg.state != IWL_AGG_OFF) {
638 IWL_ERR(priv, "Start AGG when state is not IWL_AGG_OFF !\n");
639 return -ENXIO;
640 }
641
642 txq_id = iwlagn_alloc_agg_txq(priv, ctx->ac_to_queue[tid_to_ac[tid]]);
643 if (txq_id < 0) {
644 IWL_DEBUG_TX_QUEUES(priv,
645 "No free aggregation queue for %pM/%d\n",
646 sta->addr, tid);
647 return txq_id;
648 }
649
650 ret = iwl_sta_tx_modify_enable_tid(priv, sta_id, tid);
651 if (ret)
652 return ret;
653
654 spin_lock_bh(&priv->sta_lock);
655 tid_data = &priv->tid_data[sta_id][tid];
656 tid_data->agg.ssn = SEQ_TO_SN(tid_data->seq_number);
657 tid_data->agg.txq_id = txq_id;
658
659 *ssn = tid_data->agg.ssn;
660
661 if (*ssn == tid_data->next_reclaimed) {
662 IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d\n",
663 tid_data->agg.ssn);
664 tid_data->agg.state = IWL_AGG_STARTING;
665 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
666 } else {
667 IWL_DEBUG_TX_QUEUES(priv, "Can't proceed: ssn %d, "
668 "next_reclaimed = %d\n",
669 tid_data->agg.ssn,
670 tid_data->next_reclaimed);
671 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA;
672 }
673 spin_unlock_bh(&priv->sta_lock);
674
675 return ret;
676 }
677
678 int iwlagn_tx_agg_oper(struct iwl_priv *priv, struct ieee80211_vif *vif,
679 struct ieee80211_sta *sta, u16 tid, u8 buf_size)
680 {
681 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
682 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
683 int q, fifo;
684 u16 ssn;
685
686 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
687
688 spin_lock_bh(&priv->sta_lock);
689 ssn = priv->tid_data[sta_priv->sta_id][tid].agg.ssn;
690 q = priv->tid_data[sta_priv->sta_id][tid].agg.txq_id;
691 priv->tid_data[sta_priv->sta_id][tid].agg.state = IWL_AGG_ON;
692 spin_unlock_bh(&priv->sta_lock);
693
694 fifo = ctx->ac_to_fifo[tid_to_ac[tid]];
695
696 iwl_trans_txq_enable(priv->trans, q, fifo, sta_priv->sta_id, tid,
697 buf_size, ssn);
698
699 /*
700 * If the limit is 0, then it wasn't initialised yet,
701 * use the default. We can do that since we take the
702 * minimum below, and we don't want to go above our
703 * default due to hardware restrictions.
704 */
705 if (sta_priv->max_agg_bufsize == 0)
706 sta_priv->max_agg_bufsize =
707 LINK_QUAL_AGG_FRAME_LIMIT_DEF;
708
709 /*
710 * Even though in theory the peer could have different
711 * aggregation reorder buffer sizes for different sessions,
712 * our ucode doesn't allow for that and has a global limit
713 * for each station. Therefore, use the minimum of all the
714 * aggregation sessions and our default value.
715 */
716 sta_priv->max_agg_bufsize =
717 min(sta_priv->max_agg_bufsize, buf_size);
718
719 if (priv->hw_params.use_rts_for_aggregation) {
720 /*
721 * switch to RTS/CTS if it is the prefer protection
722 * method for HT traffic
723 */
724
725 sta_priv->lq_sta.lq.general_params.flags |=
726 LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
727 }
728 priv->agg_tids_count++;
729 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
730 priv->agg_tids_count);
731
732 sta_priv->lq_sta.lq.agg_params.agg_frame_cnt_limit =
733 sta_priv->max_agg_bufsize;
734
735 IWL_DEBUG_HT(priv, "Tx aggregation enabled on ra = %pM tid = %d\n",
736 sta->addr, tid);
737
738 return iwl_send_lq_cmd(priv, ctx,
739 &sta_priv->lq_sta.lq, CMD_ASYNC, false);
740 }
741
742 static void iwlagn_check_ratid_empty(struct iwl_priv *priv, int sta_id, u8 tid)
743 {
744 struct iwl_tid_data *tid_data = &priv->tid_data[sta_id][tid];
745 enum iwl_rxon_context_id ctx;
746 struct ieee80211_vif *vif;
747 u8 *addr;
748
749 lockdep_assert_held(&priv->sta_lock);
750
751 addr = priv->stations[sta_id].sta.sta.addr;
752 ctx = priv->stations[sta_id].ctxid;
753 vif = priv->contexts[ctx].vif;
754
755 switch (priv->tid_data[sta_id][tid].agg.state) {
756 case IWL_EMPTYING_HW_QUEUE_DELBA:
757 /* There are no packets for this RA / TID in the HW any more */
758 if (tid_data->agg.ssn == tid_data->next_reclaimed) {
759 IWL_DEBUG_TX_QUEUES(priv,
760 "Can continue DELBA flow ssn = next_recl ="
761 " %d", tid_data->next_reclaimed);
762 iwl_trans_txq_disable(priv->trans,
763 tid_data->agg.txq_id);
764 iwlagn_dealloc_agg_txq(priv, tid_data->agg.txq_id);
765 tid_data->agg.state = IWL_AGG_OFF;
766 ieee80211_stop_tx_ba_cb_irqsafe(vif, addr, tid);
767 }
768 break;
769 case IWL_EMPTYING_HW_QUEUE_ADDBA:
770 /* There are no packets for this RA / TID in the HW any more */
771 if (tid_data->agg.ssn == tid_data->next_reclaimed) {
772 IWL_DEBUG_TX_QUEUES(priv,
773 "Can continue ADDBA flow ssn = next_recl ="
774 " %d", tid_data->next_reclaimed);
775 tid_data->agg.state = IWL_AGG_STARTING;
776 ieee80211_start_tx_ba_cb_irqsafe(vif, addr, tid);
777 }
778 break;
779 default:
780 break;
781 }
782 }
783
784 static void iwlagn_non_agg_tx_status(struct iwl_priv *priv,
785 struct iwl_rxon_context *ctx,
786 const u8 *addr1)
787 {
788 struct ieee80211_sta *sta;
789 struct iwl_station_priv *sta_priv;
790
791 rcu_read_lock();
792 sta = ieee80211_find_sta(ctx->vif, addr1);
793 if (sta) {
794 sta_priv = (void *)sta->drv_priv;
795 /* avoid atomic ops if this isn't a client */
796 if (sta_priv->client &&
797 atomic_dec_return(&sta_priv->pending_frames) == 0)
798 ieee80211_sta_block_awake(priv->hw, sta, false);
799 }
800 rcu_read_unlock();
801 }
802
803 /**
804 * translate ucode response to mac80211 tx status control values
805 */
806 static void iwlagn_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
807 struct ieee80211_tx_info *info)
808 {
809 struct ieee80211_tx_rate *r = &info->status.rates[0];
810
811 info->status.antenna =
812 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
813 if (rate_n_flags & RATE_MCS_HT_MSK)
814 r->flags |= IEEE80211_TX_RC_MCS;
815 if (rate_n_flags & RATE_MCS_GF_MSK)
816 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
817 if (rate_n_flags & RATE_MCS_HT40_MSK)
818 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
819 if (rate_n_flags & RATE_MCS_DUP_MSK)
820 r->flags |= IEEE80211_TX_RC_DUP_DATA;
821 if (rate_n_flags & RATE_MCS_SGI_MSK)
822 r->flags |= IEEE80211_TX_RC_SHORT_GI;
823 r->idx = iwlagn_hwrate_to_mac80211_idx(rate_n_flags, info->band);
824 }
825
826 #ifdef CONFIG_IWLWIFI_DEBUG
827 const char *iwl_get_tx_fail_reason(u32 status)
828 {
829 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
830 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
831
832 switch (status & TX_STATUS_MSK) {
833 case TX_STATUS_SUCCESS:
834 return "SUCCESS";
835 TX_STATUS_POSTPONE(DELAY);
836 TX_STATUS_POSTPONE(FEW_BYTES);
837 TX_STATUS_POSTPONE(BT_PRIO);
838 TX_STATUS_POSTPONE(QUIET_PERIOD);
839 TX_STATUS_POSTPONE(CALC_TTAK);
840 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
841 TX_STATUS_FAIL(SHORT_LIMIT);
842 TX_STATUS_FAIL(LONG_LIMIT);
843 TX_STATUS_FAIL(FIFO_UNDERRUN);
844 TX_STATUS_FAIL(DRAIN_FLOW);
845 TX_STATUS_FAIL(RFKILL_FLUSH);
846 TX_STATUS_FAIL(LIFE_EXPIRE);
847 TX_STATUS_FAIL(DEST_PS);
848 TX_STATUS_FAIL(HOST_ABORTED);
849 TX_STATUS_FAIL(BT_RETRY);
850 TX_STATUS_FAIL(STA_INVALID);
851 TX_STATUS_FAIL(FRAG_DROPPED);
852 TX_STATUS_FAIL(TID_DISABLE);
853 TX_STATUS_FAIL(FIFO_FLUSHED);
854 TX_STATUS_FAIL(INSUFFICIENT_CF_POLL);
855 TX_STATUS_FAIL(PASSIVE_NO_RX);
856 TX_STATUS_FAIL(NO_BEACON_ON_RADAR);
857 }
858
859 return "UNKNOWN";
860
861 #undef TX_STATUS_FAIL
862 #undef TX_STATUS_POSTPONE
863 }
864 #endif /* CONFIG_IWLWIFI_DEBUG */
865
866 static void iwlagn_count_agg_tx_err_status(struct iwl_priv *priv, u16 status)
867 {
868 status &= AGG_TX_STATUS_MSK;
869
870 switch (status) {
871 case AGG_TX_STATE_UNDERRUN_MSK:
872 priv->reply_agg_tx_stats.underrun++;
873 break;
874 case AGG_TX_STATE_BT_PRIO_MSK:
875 priv->reply_agg_tx_stats.bt_prio++;
876 break;
877 case AGG_TX_STATE_FEW_BYTES_MSK:
878 priv->reply_agg_tx_stats.few_bytes++;
879 break;
880 case AGG_TX_STATE_ABORT_MSK:
881 priv->reply_agg_tx_stats.abort++;
882 break;
883 case AGG_TX_STATE_LAST_SENT_TTL_MSK:
884 priv->reply_agg_tx_stats.last_sent_ttl++;
885 break;
886 case AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK:
887 priv->reply_agg_tx_stats.last_sent_try++;
888 break;
889 case AGG_TX_STATE_LAST_SENT_BT_KILL_MSK:
890 priv->reply_agg_tx_stats.last_sent_bt_kill++;
891 break;
892 case AGG_TX_STATE_SCD_QUERY_MSK:
893 priv->reply_agg_tx_stats.scd_query++;
894 break;
895 case AGG_TX_STATE_TEST_BAD_CRC32_MSK:
896 priv->reply_agg_tx_stats.bad_crc32++;
897 break;
898 case AGG_TX_STATE_RESPONSE_MSK:
899 priv->reply_agg_tx_stats.response++;
900 break;
901 case AGG_TX_STATE_DUMP_TX_MSK:
902 priv->reply_agg_tx_stats.dump_tx++;
903 break;
904 case AGG_TX_STATE_DELAY_TX_MSK:
905 priv->reply_agg_tx_stats.delay_tx++;
906 break;
907 default:
908 priv->reply_agg_tx_stats.unknown++;
909 break;
910 }
911 }
912
913 static void iwl_rx_reply_tx_agg(struct iwl_priv *priv,
914 struct iwlagn_tx_resp *tx_resp)
915 {
916 struct agg_tx_status *frame_status = &tx_resp->status;
917 int tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
918 IWLAGN_TX_RES_TID_POS;
919 int sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
920 IWLAGN_TX_RES_RA_POS;
921 struct iwl_ht_agg *agg = &priv->tid_data[sta_id][tid].agg;
922 u32 status = le16_to_cpu(tx_resp->status.status);
923 int i;
924
925 WARN_ON(tid == IWL_TID_NON_QOS);
926
927 if (agg->wait_for_ba)
928 IWL_DEBUG_TX_REPLY(priv,
929 "got tx response w/o block-ack\n");
930
931 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
932 agg->wait_for_ba = (tx_resp->frame_count > 1);
933
934 /*
935 * If the BT kill count is non-zero, we'll get this
936 * notification again.
937 */
938 if (tx_resp->bt_kill_count && tx_resp->frame_count == 1 &&
939 priv->cfg->bt_params &&
940 priv->cfg->bt_params->advanced_bt_coexist) {
941 IWL_DEBUG_COEX(priv, "receive reply tx w/ bt_kill\n");
942 }
943
944 if (tx_resp->frame_count == 1)
945 return;
946
947 /* Construct bit-map of pending frames within Tx window */
948 for (i = 0; i < tx_resp->frame_count; i++) {
949 u16 fstatus = le16_to_cpu(frame_status[i].status);
950
951 if (status & AGG_TX_STATUS_MSK)
952 iwlagn_count_agg_tx_err_status(priv, fstatus);
953
954 if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
955 AGG_TX_STATE_ABORT_MSK))
956 continue;
957
958 IWL_DEBUG_TX_REPLY(priv, "status %s (0x%08x), "
959 "try-count (0x%08x)\n",
960 iwl_get_agg_tx_fail_reason(fstatus),
961 fstatus & AGG_TX_STATUS_MSK,
962 fstatus & AGG_TX_TRY_MSK);
963 }
964 }
965
966 #ifdef CONFIG_IWLWIFI_DEBUG
967 #define AGG_TX_STATE_FAIL(x) case AGG_TX_STATE_ ## x: return #x
968
969 const char *iwl_get_agg_tx_fail_reason(u16 status)
970 {
971 status &= AGG_TX_STATUS_MSK;
972 switch (status) {
973 case AGG_TX_STATE_TRANSMITTED:
974 return "SUCCESS";
975 AGG_TX_STATE_FAIL(UNDERRUN_MSK);
976 AGG_TX_STATE_FAIL(BT_PRIO_MSK);
977 AGG_TX_STATE_FAIL(FEW_BYTES_MSK);
978 AGG_TX_STATE_FAIL(ABORT_MSK);
979 AGG_TX_STATE_FAIL(LAST_SENT_TTL_MSK);
980 AGG_TX_STATE_FAIL(LAST_SENT_TRY_CNT_MSK);
981 AGG_TX_STATE_FAIL(LAST_SENT_BT_KILL_MSK);
982 AGG_TX_STATE_FAIL(SCD_QUERY_MSK);
983 AGG_TX_STATE_FAIL(TEST_BAD_CRC32_MSK);
984 AGG_TX_STATE_FAIL(RESPONSE_MSK);
985 AGG_TX_STATE_FAIL(DUMP_TX_MSK);
986 AGG_TX_STATE_FAIL(DELAY_TX_MSK);
987 }
988
989 return "UNKNOWN";
990 }
991 #endif /* CONFIG_IWLWIFI_DEBUG */
992
993 static inline u32 iwlagn_get_scd_ssn(struct iwlagn_tx_resp *tx_resp)
994 {
995 return le32_to_cpup((__le32 *)&tx_resp->status +
996 tx_resp->frame_count) & MAX_SN;
997 }
998
999 static void iwlagn_count_tx_err_status(struct iwl_priv *priv, u16 status)
1000 {
1001 status &= TX_STATUS_MSK;
1002
1003 switch (status) {
1004 case TX_STATUS_POSTPONE_DELAY:
1005 priv->reply_tx_stats.pp_delay++;
1006 break;
1007 case TX_STATUS_POSTPONE_FEW_BYTES:
1008 priv->reply_tx_stats.pp_few_bytes++;
1009 break;
1010 case TX_STATUS_POSTPONE_BT_PRIO:
1011 priv->reply_tx_stats.pp_bt_prio++;
1012 break;
1013 case TX_STATUS_POSTPONE_QUIET_PERIOD:
1014 priv->reply_tx_stats.pp_quiet_period++;
1015 break;
1016 case TX_STATUS_POSTPONE_CALC_TTAK:
1017 priv->reply_tx_stats.pp_calc_ttak++;
1018 break;
1019 case TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY:
1020 priv->reply_tx_stats.int_crossed_retry++;
1021 break;
1022 case TX_STATUS_FAIL_SHORT_LIMIT:
1023 priv->reply_tx_stats.short_limit++;
1024 break;
1025 case TX_STATUS_FAIL_LONG_LIMIT:
1026 priv->reply_tx_stats.long_limit++;
1027 break;
1028 case TX_STATUS_FAIL_FIFO_UNDERRUN:
1029 priv->reply_tx_stats.fifo_underrun++;
1030 break;
1031 case TX_STATUS_FAIL_DRAIN_FLOW:
1032 priv->reply_tx_stats.drain_flow++;
1033 break;
1034 case TX_STATUS_FAIL_RFKILL_FLUSH:
1035 priv->reply_tx_stats.rfkill_flush++;
1036 break;
1037 case TX_STATUS_FAIL_LIFE_EXPIRE:
1038 priv->reply_tx_stats.life_expire++;
1039 break;
1040 case TX_STATUS_FAIL_DEST_PS:
1041 priv->reply_tx_stats.dest_ps++;
1042 break;
1043 case TX_STATUS_FAIL_HOST_ABORTED:
1044 priv->reply_tx_stats.host_abort++;
1045 break;
1046 case TX_STATUS_FAIL_BT_RETRY:
1047 priv->reply_tx_stats.bt_retry++;
1048 break;
1049 case TX_STATUS_FAIL_STA_INVALID:
1050 priv->reply_tx_stats.sta_invalid++;
1051 break;
1052 case TX_STATUS_FAIL_FRAG_DROPPED:
1053 priv->reply_tx_stats.frag_drop++;
1054 break;
1055 case TX_STATUS_FAIL_TID_DISABLE:
1056 priv->reply_tx_stats.tid_disable++;
1057 break;
1058 case TX_STATUS_FAIL_FIFO_FLUSHED:
1059 priv->reply_tx_stats.fifo_flush++;
1060 break;
1061 case TX_STATUS_FAIL_INSUFFICIENT_CF_POLL:
1062 priv->reply_tx_stats.insuff_cf_poll++;
1063 break;
1064 case TX_STATUS_FAIL_PASSIVE_NO_RX:
1065 priv->reply_tx_stats.fail_hw_drop++;
1066 break;
1067 case TX_STATUS_FAIL_NO_BEACON_ON_RADAR:
1068 priv->reply_tx_stats.sta_color_mismatch++;
1069 break;
1070 default:
1071 priv->reply_tx_stats.unknown++;
1072 break;
1073 }
1074 }
1075
1076 static void iwlagn_set_tx_status(struct iwl_priv *priv,
1077 struct ieee80211_tx_info *info,
1078 struct iwlagn_tx_resp *tx_resp)
1079 {
1080 u16 status = le16_to_cpu(tx_resp->status.status);
1081
1082 info->status.rates[0].count = tx_resp->failure_frame + 1;
1083 info->flags |= iwl_tx_status_to_mac80211(status);
1084 iwlagn_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
1085 info);
1086 if (!iwl_is_tx_success(status))
1087 iwlagn_count_tx_err_status(priv, status);
1088 }
1089
1090 static void iwl_check_abort_status(struct iwl_priv *priv,
1091 u8 frame_count, u32 status)
1092 {
1093 if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) {
1094 IWL_ERR(priv, "Tx flush command to flush out all frames\n");
1095 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
1096 queue_work(priv->workqueue, &priv->tx_flush);
1097 }
1098 }
1099
1100 int iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb,
1101 struct iwl_device_cmd *cmd)
1102 {
1103 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1104 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1105 int txq_id = SEQ_TO_QUEUE(sequence);
1106 int cmd_index __maybe_unused = SEQ_TO_INDEX(sequence);
1107 struct iwlagn_tx_resp *tx_resp = (void *)pkt->data;
1108 struct ieee80211_hdr *hdr;
1109 u32 status = le16_to_cpu(tx_resp->status.status);
1110 u16 ssn = iwlagn_get_scd_ssn(tx_resp);
1111 int tid;
1112 int sta_id;
1113 int freed;
1114 struct ieee80211_tx_info *info;
1115 struct sk_buff_head skbs;
1116 struct sk_buff *skb;
1117 struct iwl_rxon_context *ctx;
1118 bool is_agg = (txq_id >= IWLAGN_FIRST_AMPDU_QUEUE);
1119 bool is_offchannel_skb;
1120
1121 tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
1122 IWLAGN_TX_RES_TID_POS;
1123 sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
1124 IWLAGN_TX_RES_RA_POS;
1125
1126 spin_lock(&priv->sta_lock);
1127
1128 if (is_agg)
1129 iwl_rx_reply_tx_agg(priv, tx_resp);
1130
1131 __skb_queue_head_init(&skbs);
1132
1133 is_offchannel_skb = false;
1134
1135 if (tx_resp->frame_count == 1) {
1136 u16 next_reclaimed = le16_to_cpu(tx_resp->seq_ctl);
1137 next_reclaimed = SEQ_TO_SN(next_reclaimed + 0x10);
1138
1139 if (is_agg) {
1140 /* If this is an aggregation queue, we can rely on the
1141 * ssn since the wifi sequence number corresponds to
1142 * the index in the TFD ring (%256).
1143 * The seq_ctl is the sequence control of the packet
1144 * to which this Tx response relates. But if there is a
1145 * hole in the bitmap of the BA we received, this Tx
1146 * response may allow to reclaim the hole and all the
1147 * subsequent packets that were already acked.
1148 * In that case, seq_ctl != ssn, and the next packet
1149 * to be reclaimed will be ssn and not seq_ctl.
1150 */
1151 next_reclaimed = ssn;
1152 }
1153
1154 if (tid != IWL_TID_NON_QOS) {
1155 priv->tid_data[sta_id][tid].next_reclaimed =
1156 next_reclaimed;
1157 IWL_DEBUG_TX_REPLY(priv, "Next reclaimed packet:%d\n",
1158 next_reclaimed);
1159 }
1160
1161 iwl_trans_reclaim(priv->trans, txq_id, ssn, &skbs);
1162
1163 iwlagn_check_ratid_empty(priv, sta_id, tid);
1164 freed = 0;
1165
1166 /* process frames */
1167 skb_queue_walk(&skbs, skb) {
1168 hdr = (struct ieee80211_hdr *)skb->data;
1169
1170 if (!ieee80211_is_data_qos(hdr->frame_control))
1171 priv->last_seq_ctl = tx_resp->seq_ctl;
1172
1173 info = IEEE80211_SKB_CB(skb);
1174 ctx = info->driver_data[0];
1175 iwl_trans_free_tx_cmd(priv->trans,
1176 info->driver_data[1]);
1177
1178 memset(&info->status, 0, sizeof(info->status));
1179
1180 if (status == TX_STATUS_FAIL_PASSIVE_NO_RX &&
1181 iwl_is_associated_ctx(ctx) && ctx->vif &&
1182 ctx->vif->type == NL80211_IFTYPE_STATION) {
1183 /* block and stop all queues */
1184 priv->passive_no_rx = true;
1185 IWL_DEBUG_TX_QUEUES(priv, "stop all queues: "
1186 "passive channel");
1187 ieee80211_stop_queues(priv->hw);
1188
1189 IWL_DEBUG_TX_REPLY(priv,
1190 "TXQ %d status %s (0x%08x) "
1191 "rate_n_flags 0x%x retries %d\n",
1192 txq_id,
1193 iwl_get_tx_fail_reason(status),
1194 status,
1195 le32_to_cpu(tx_resp->rate_n_flags),
1196 tx_resp->failure_frame);
1197
1198 IWL_DEBUG_TX_REPLY(priv,
1199 "FrameCnt = %d, idx=%d\n",
1200 tx_resp->frame_count, cmd_index);
1201 }
1202
1203 /* check if BAR is needed */
1204 if (is_agg && !iwl_is_tx_success(status))
1205 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1206 iwlagn_set_tx_status(priv, IEEE80211_SKB_CB(skb),
1207 tx_resp);
1208 if (!is_agg)
1209 iwlagn_non_agg_tx_status(priv, ctx, hdr->addr1);
1210
1211 is_offchannel_skb =
1212 (info->flags & IEEE80211_TX_CTL_TX_OFFCHAN);
1213 freed++;
1214 }
1215
1216 WARN_ON(!is_agg && freed != 1);
1217
1218 /*
1219 * An offchannel frame can be send only on the AUX queue, where
1220 * there is no aggregation (and reordering) so it only is single
1221 * skb is expected to be processed.
1222 */
1223 WARN_ON(is_offchannel_skb && freed != 1);
1224 }
1225
1226 iwl_check_abort_status(priv, tx_resp->frame_count, status);
1227 spin_unlock(&priv->sta_lock);
1228
1229 while (!skb_queue_empty(&skbs)) {
1230 skb = __skb_dequeue(&skbs);
1231 ieee80211_tx_status(priv->hw, skb);
1232 }
1233
1234 if (is_offchannel_skb)
1235 iwl_scan_offchannel_skb_status(priv);
1236
1237 return 0;
1238 }
1239
1240 /**
1241 * iwlagn_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
1242 *
1243 * Handles block-acknowledge notification from device, which reports success
1244 * of frames sent via aggregation.
1245 */
1246 int iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv,
1247 struct iwl_rx_cmd_buffer *rxb,
1248 struct iwl_device_cmd *cmd)
1249 {
1250 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1251 struct iwl_compressed_ba_resp *ba_resp = (void *)pkt->data;
1252 struct iwl_ht_agg *agg;
1253 struct sk_buff_head reclaimed_skbs;
1254 struct ieee80211_tx_info *info;
1255 struct ieee80211_hdr *hdr;
1256 struct sk_buff *skb;
1257 int sta_id;
1258 int tid;
1259 int freed;
1260
1261 /* "flow" corresponds to Tx queue */
1262 u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
1263
1264 /* "ssn" is start of block-ack Tx window, corresponds to index
1265 * (in Tx queue's circular buffer) of first TFD/frame in window */
1266 u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
1267
1268 if (scd_flow >= priv->cfg->base_params->num_of_queues) {
1269 IWL_ERR(priv,
1270 "BUG_ON scd_flow is bigger than number of queues\n");
1271 return 0;
1272 }
1273
1274 sta_id = ba_resp->sta_id;
1275 tid = ba_resp->tid;
1276 agg = &priv->tid_data[sta_id][tid].agg;
1277
1278 spin_lock(&priv->sta_lock);
1279
1280 if (unlikely(!agg->wait_for_ba)) {
1281 if (unlikely(ba_resp->bitmap))
1282 IWL_ERR(priv, "Received BA when not expected\n");
1283 spin_unlock(&priv->sta_lock);
1284 return 0;
1285 }
1286
1287 if (unlikely(scd_flow != agg->txq_id)) {
1288 /*
1289 * FIXME: this is a uCode bug which need to be addressed,
1290 * log the information and return for now.
1291 * Since it is can possibly happen very often and in order
1292 * not to fill the syslog, don't use IWL_ERR or IWL_WARN
1293 */
1294 IWL_DEBUG_TX_QUEUES(priv,
1295 "Bad queue mapping txq_id=%d, agg_txq[sta:%d,tid:%d]=%d\n",
1296 scd_flow, sta_id, tid, agg->txq_id);
1297 spin_unlock(&priv->sta_lock);
1298 return 0;
1299 }
1300
1301 __skb_queue_head_init(&reclaimed_skbs);
1302
1303 /* Release all TFDs before the SSN, i.e. all TFDs in front of
1304 * block-ack window (we assume that they've been successfully
1305 * transmitted ... if not, it's too late anyway). */
1306 iwl_trans_reclaim(priv->trans, scd_flow, ba_resp_scd_ssn,
1307 &reclaimed_skbs);
1308
1309 IWL_DEBUG_TX_REPLY(priv, "REPLY_COMPRESSED_BA [%d] Received from %pM, "
1310 "sta_id = %d\n",
1311 agg->wait_for_ba,
1312 (u8 *) &ba_resp->sta_addr_lo32,
1313 ba_resp->sta_id);
1314 IWL_DEBUG_TX_REPLY(priv, "TID = %d, SeqCtl = %d, bitmap = 0x%llx, "
1315 "scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
1316 ba_resp->tid, le16_to_cpu(ba_resp->seq_ctl),
1317 (unsigned long long)le64_to_cpu(ba_resp->bitmap),
1318 scd_flow, ba_resp_scd_ssn, ba_resp->txed,
1319 ba_resp->txed_2_done);
1320
1321 /* Mark that the expected block-ack response arrived */
1322 agg->wait_for_ba = false;
1323
1324 /* Sanity check values reported by uCode */
1325 if (ba_resp->txed_2_done > ba_resp->txed) {
1326 IWL_DEBUG_TX_REPLY(priv,
1327 "bogus sent(%d) and ack(%d) count\n",
1328 ba_resp->txed, ba_resp->txed_2_done);
1329 /*
1330 * set txed_2_done = txed,
1331 * so it won't impact rate scale
1332 */
1333 ba_resp->txed = ba_resp->txed_2_done;
1334 }
1335
1336 priv->tid_data[sta_id][tid].next_reclaimed = ba_resp_scd_ssn;
1337
1338 iwlagn_check_ratid_empty(priv, sta_id, tid);
1339 freed = 0;
1340
1341 skb_queue_walk(&reclaimed_skbs, skb) {
1342 hdr = (struct ieee80211_hdr *)skb->data;
1343
1344 if (ieee80211_is_data_qos(hdr->frame_control))
1345 freed++;
1346 else
1347 WARN_ON_ONCE(1);
1348
1349 info = IEEE80211_SKB_CB(skb);
1350 iwl_trans_free_tx_cmd(priv->trans, info->driver_data[1]);
1351
1352 if (freed == 1) {
1353 /* this is the first skb we deliver in this batch */
1354 /* put the rate scaling data there */
1355 info = IEEE80211_SKB_CB(skb);
1356 memset(&info->status, 0, sizeof(info->status));
1357 info->flags |= IEEE80211_TX_STAT_ACK;
1358 info->flags |= IEEE80211_TX_STAT_AMPDU;
1359 info->status.ampdu_ack_len = ba_resp->txed_2_done;
1360 info->status.ampdu_len = ba_resp->txed;
1361 iwlagn_hwrate_to_tx_control(priv, agg->rate_n_flags,
1362 info);
1363 }
1364 }
1365
1366 spin_unlock(&priv->sta_lock);
1367
1368 while (!skb_queue_empty(&reclaimed_skbs)) {
1369 skb = __skb_dequeue(&reclaimed_skbs);
1370 ieee80211_tx_status(priv->hw, skb);
1371 }
1372
1373 return 0;
1374 }
Linux kernel - Deliverables
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