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slip: Fix use-after-free Read in slip_open
[mirror_ubuntu-jammy-kernel.git] / drivers / net / wireless / intel / iwlwifi / dvm / tx.c
1 // SPDX-License-Identifier: GPL-2.0-only
2 /******************************************************************************
3 *
4 * Copyright(c) 2008 - 2014 Intel Corporation. All rights reserved.
5 * Copyright (C) 2019 Intel Corporation
6 *
7 * Contact Information:
8 * Intel Linux Wireless <linuxwifi@intel.com>
9 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
10 *
11 *****************************************************************************/
12
13 #include <linux/kernel.h>
14 #include <linux/module.h>
15 #include <linux/sched.h>
16 #include <linux/ieee80211.h>
17 #include "iwl-io.h"
18 #include "iwl-trans.h"
19 #include "iwl-agn-hw.h"
20 #include "dev.h"
21 #include "agn.h"
22
23 static const u8 tid_to_ac[] = {
24 IEEE80211_AC_BE,
25 IEEE80211_AC_BK,
26 IEEE80211_AC_BK,
27 IEEE80211_AC_BE,
28 IEEE80211_AC_VI,
29 IEEE80211_AC_VI,
30 IEEE80211_AC_VO,
31 IEEE80211_AC_VO,
32 };
33
34 static void iwlagn_tx_cmd_protection(struct iwl_priv *priv,
35 struct ieee80211_tx_info *info,
36 __le16 fc, __le32 *tx_flags)
37 {
38 if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS ||
39 info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT ||
40 info->flags & IEEE80211_TX_CTL_AMPDU)
41 *tx_flags |= TX_CMD_FLG_PROT_REQUIRE_MSK;
42 }
43
44 /*
45 * handle build REPLY_TX command notification.
46 */
47 static void iwlagn_tx_cmd_build_basic(struct iwl_priv *priv,
48 struct sk_buff *skb,
49 struct iwl_tx_cmd *tx_cmd,
50 struct ieee80211_tx_info *info,
51 struct ieee80211_hdr *hdr, u8 sta_id)
52 {
53 __le16 fc = hdr->frame_control;
54 __le32 tx_flags = tx_cmd->tx_flags;
55
56 tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
57
58 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
59 tx_flags |= TX_CMD_FLG_ACK_MSK;
60 else
61 tx_flags &= ~TX_CMD_FLG_ACK_MSK;
62
63 if (ieee80211_is_probe_resp(fc))
64 tx_flags |= TX_CMD_FLG_TSF_MSK;
65 else if (ieee80211_is_back_req(fc))
66 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK;
67 else if (info->band == NL80211_BAND_2GHZ &&
68 priv->lib->bt_params &&
69 priv->lib->bt_params->advanced_bt_coexist &&
70 (ieee80211_is_auth(fc) || ieee80211_is_assoc_req(fc) ||
71 ieee80211_is_reassoc_req(fc) ||
72 info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO))
73 tx_flags |= TX_CMD_FLG_IGNORE_BT;
74
75
76 tx_cmd->sta_id = sta_id;
77 if (ieee80211_has_morefrags(fc))
78 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
79
80 if (ieee80211_is_data_qos(fc)) {
81 u8 *qc = ieee80211_get_qos_ctl(hdr);
82 tx_cmd->tid_tspec = qc[0] & 0xf;
83 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
84 } else {
85 tx_cmd->tid_tspec = IWL_TID_NON_QOS;
86 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
87 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
88 else
89 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
90 }
91
92 iwlagn_tx_cmd_protection(priv, info, fc, &tx_flags);
93
94 tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
95 if (ieee80211_is_mgmt(fc)) {
96 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
97 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
98 else
99 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
100 } else {
101 tx_cmd->timeout.pm_frame_timeout = 0;
102 }
103
104 tx_cmd->driver_txop = 0;
105 tx_cmd->tx_flags = tx_flags;
106 tx_cmd->next_frame_len = 0;
107 }
108
109 static void iwlagn_tx_cmd_build_rate(struct iwl_priv *priv,
110 struct iwl_tx_cmd *tx_cmd,
111 struct ieee80211_tx_info *info,
112 struct ieee80211_sta *sta,
113 __le16 fc)
114 {
115 u32 rate_flags;
116 int rate_idx;
117 u8 rts_retry_limit;
118 u8 data_retry_limit;
119 u8 rate_plcp;
120
121 if (priv->wowlan) {
122 rts_retry_limit = IWLAGN_LOW_RETRY_LIMIT;
123 data_retry_limit = IWLAGN_LOW_RETRY_LIMIT;
124 } else {
125 /* Set retry limit on RTS packets */
126 rts_retry_limit = IWLAGN_RTS_DFAULT_RETRY_LIMIT;
127
128 /* Set retry limit on DATA packets and Probe Responses*/
129 if (ieee80211_is_probe_resp(fc)) {
130 data_retry_limit = IWLAGN_MGMT_DFAULT_RETRY_LIMIT;
131 rts_retry_limit =
132 min(data_retry_limit, rts_retry_limit);
133 } else if (ieee80211_is_back_req(fc))
134 data_retry_limit = IWLAGN_BAR_DFAULT_RETRY_LIMIT;
135 else
136 data_retry_limit = IWLAGN_DEFAULT_TX_RETRY;
137 }
138
139 tx_cmd->data_retry_limit = data_retry_limit;
140 tx_cmd->rts_retry_limit = rts_retry_limit;
141
142 /* DATA packets will use the uCode station table for rate/antenna
143 * selection */
144 if (ieee80211_is_data(fc)) {
145 tx_cmd->initial_rate_index = 0;
146 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
147 return;
148 } else if (ieee80211_is_back_req(fc))
149 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
150
151 /**
152 * If the current TX rate stored in mac80211 has the MCS bit set, it's
153 * not really a TX rate. Thus, we use the lowest supported rate for
154 * this band. Also use the lowest supported rate if the stored rate
155 * index is invalid.
156 */
157 rate_idx = info->control.rates[0].idx;
158 if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS ||
159 (rate_idx < 0) || (rate_idx > IWL_RATE_COUNT_LEGACY))
160 rate_idx = rate_lowest_index(
161 &priv->nvm_data->bands[info->band], sta);
162 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
163 if (info->band == NL80211_BAND_5GHZ)
164 rate_idx += IWL_FIRST_OFDM_RATE;
165 /* Get PLCP rate for tx_cmd->rate_n_flags */
166 rate_plcp = iwl_rates[rate_idx].plcp;
167 /* Zero out flags for this packet */
168 rate_flags = 0;
169
170 /* Set CCK flag as needed */
171 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
172 rate_flags |= RATE_MCS_CCK_MSK;
173
174 /* Set up antennas */
175 if (priv->lib->bt_params &&
176 priv->lib->bt_params->advanced_bt_coexist &&
177 priv->bt_full_concurrent) {
178 /* operated as 1x1 in full concurrency mode */
179 priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
180 first_antenna(priv->nvm_data->valid_tx_ant));
181 } else
182 priv->mgmt_tx_ant = iwl_toggle_tx_ant(
183 priv, priv->mgmt_tx_ant,
184 priv->nvm_data->valid_tx_ant);
185 rate_flags |= iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
186
187 /* Set the rate in the TX cmd */
188 tx_cmd->rate_n_flags = iwl_hw_set_rate_n_flags(rate_plcp, rate_flags);
189 }
190
191 static void iwlagn_tx_cmd_build_hwcrypto(struct iwl_priv *priv,
192 struct ieee80211_tx_info *info,
193 struct iwl_tx_cmd *tx_cmd,
194 struct sk_buff *skb_frag)
195 {
196 struct ieee80211_key_conf *keyconf = info->control.hw_key;
197
198 switch (keyconf->cipher) {
199 case WLAN_CIPHER_SUITE_CCMP:
200 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
201 memcpy(tx_cmd->key, keyconf->key, keyconf->keylen);
202 if (info->flags & IEEE80211_TX_CTL_AMPDU)
203 tx_cmd->tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
204 break;
205
206 case WLAN_CIPHER_SUITE_TKIP:
207 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
208 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
209 break;
210
211 case WLAN_CIPHER_SUITE_WEP104:
212 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
213 /* fall through */
214 case WLAN_CIPHER_SUITE_WEP40:
215 tx_cmd->sec_ctl |= (TX_CMD_SEC_WEP |
216 (keyconf->keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT);
217
218 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
219
220 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
221 "with key %d\n", keyconf->keyidx);
222 break;
223
224 default:
225 IWL_ERR(priv, "Unknown encode cipher %x\n", keyconf->cipher);
226 break;
227 }
228 }
229
230 /**
231 * iwl_sta_id_or_broadcast - return sta_id or broadcast sta
232 * @context: the current context
233 * @sta: mac80211 station
234 *
235 * In certain circumstances mac80211 passes a station pointer
236 * that may be %NULL, for example during TX or key setup. In
237 * that case, we need to use the broadcast station, so this
238 * inline wraps that pattern.
239 */
240 static int iwl_sta_id_or_broadcast(struct iwl_rxon_context *context,
241 struct ieee80211_sta *sta)
242 {
243 int sta_id;
244
245 if (!sta)
246 return context->bcast_sta_id;
247
248 sta_id = iwl_sta_id(sta);
249
250 /*
251 * mac80211 should not be passing a partially
252 * initialised station!
253 */
254 WARN_ON(sta_id == IWL_INVALID_STATION);
255
256 return sta_id;
257 }
258
259 /*
260 * start REPLY_TX command process
261 */
262 int iwlagn_tx_skb(struct iwl_priv *priv,
263 struct ieee80211_sta *sta,
264 struct sk_buff *skb)
265 {
266 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
267 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
268 struct iwl_station_priv *sta_priv = NULL;
269 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
270 struct iwl_device_cmd *dev_cmd;
271 struct iwl_tx_cmd *tx_cmd;
272 __le16 fc;
273 u8 hdr_len;
274 u16 len, seq_number = 0;
275 u8 sta_id, tid = IWL_MAX_TID_COUNT;
276 bool is_agg = false, is_data_qos = false;
277 int txq_id;
278
279 if (info->control.vif)
280 ctx = iwl_rxon_ctx_from_vif(info->control.vif);
281
282 if (iwl_is_rfkill(priv)) {
283 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
284 goto drop_unlock_priv;
285 }
286
287 fc = hdr->frame_control;
288
289 #ifdef CONFIG_IWLWIFI_DEBUG
290 if (ieee80211_is_auth(fc))
291 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
292 else if (ieee80211_is_assoc_req(fc))
293 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
294 else if (ieee80211_is_reassoc_req(fc))
295 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
296 #endif
297
298 if (unlikely(ieee80211_is_probe_resp(fc))) {
299 struct iwl_wipan_noa_data *noa_data =
300 rcu_dereference(priv->noa_data);
301
302 if (noa_data &&
303 pskb_expand_head(skb, 0, noa_data->length,
304 GFP_ATOMIC) == 0) {
305 skb_put_data(skb, noa_data->data, noa_data->length);
306 hdr = (struct ieee80211_hdr *)skb->data;
307 }
308 }
309
310 hdr_len = ieee80211_hdrlen(fc);
311
312 /* For management frames use broadcast id to do not break aggregation */
313 if (!ieee80211_is_data(fc))
314 sta_id = ctx->bcast_sta_id;
315 else {
316 /* Find index into station table for destination station */
317 sta_id = iwl_sta_id_or_broadcast(ctx, sta);
318 if (sta_id == IWL_INVALID_STATION) {
319 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
320 hdr->addr1);
321 goto drop_unlock_priv;
322 }
323 }
324
325 if (sta)
326 sta_priv = (void *)sta->drv_priv;
327
328 if (sta_priv && sta_priv->asleep &&
329 (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER)) {
330 /*
331 * This sends an asynchronous command to the device,
332 * but we can rely on it being processed before the
333 * next frame is processed -- and the next frame to
334 * this station is the one that will consume this
335 * counter.
336 * For now set the counter to just 1 since we do not
337 * support uAPSD yet.
338 *
339 * FIXME: If we get two non-bufferable frames one
340 * after the other, we might only send out one of
341 * them because this is racy.
342 */
343 iwl_sta_modify_sleep_tx_count(priv, sta_id, 1);
344 }
345
346 dev_cmd = iwl_trans_alloc_tx_cmd(priv->trans);
347
348 if (unlikely(!dev_cmd))
349 goto drop_unlock_priv;
350
351 memset(dev_cmd, 0, sizeof(*dev_cmd));
352 dev_cmd->hdr.cmd = REPLY_TX;
353 tx_cmd = (struct iwl_tx_cmd *) dev_cmd->payload;
354
355 /* Total # bytes to be transmitted */
356 len = (u16)skb->len;
357 tx_cmd->len = cpu_to_le16(len);
358
359 if (info->control.hw_key)
360 iwlagn_tx_cmd_build_hwcrypto(priv, info, tx_cmd, skb);
361
362 /* TODO need this for burst mode later on */
363 iwlagn_tx_cmd_build_basic(priv, skb, tx_cmd, info, hdr, sta_id);
364
365 iwlagn_tx_cmd_build_rate(priv, tx_cmd, info, sta, fc);
366
367 memset(&info->status, 0, sizeof(info->status));
368 memset(info->driver_data, 0, sizeof(info->driver_data));
369
370 info->driver_data[0] = ctx;
371 info->driver_data[1] = dev_cmd;
372 /* From now on, we cannot access info->control */
373
374 spin_lock(&priv->sta_lock);
375
376 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
377 u8 *qc = NULL;
378 struct iwl_tid_data *tid_data;
379 qc = ieee80211_get_qos_ctl(hdr);
380 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
381 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
382 goto drop_unlock_sta;
383 tid_data = &priv->tid_data[sta_id][tid];
384
385 /* aggregation is on for this <sta,tid> */
386 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
387 tid_data->agg.state != IWL_AGG_ON) {
388 IWL_ERR(priv,
389 "TX_CTL_AMPDU while not in AGG: Tx flags = 0x%08x, agg.state = %d\n",
390 info->flags, tid_data->agg.state);
391 IWL_ERR(priv, "sta_id = %d, tid = %d seq_num = %d\n",
392 sta_id, tid,
393 IEEE80211_SEQ_TO_SN(tid_data->seq_number));
394 goto drop_unlock_sta;
395 }
396
397 /* We can receive packets from the stack in IWL_AGG_{ON,OFF}
398 * only. Check this here.
399 */
400 if (WARN_ONCE(tid_data->agg.state != IWL_AGG_ON &&
401 tid_data->agg.state != IWL_AGG_OFF,
402 "Tx while agg.state = %d\n", tid_data->agg.state))
403 goto drop_unlock_sta;
404
405 seq_number = tid_data->seq_number;
406 seq_number &= IEEE80211_SCTL_SEQ;
407 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
408 hdr->seq_ctrl |= cpu_to_le16(seq_number);
409 seq_number += 0x10;
410
411 if (info->flags & IEEE80211_TX_CTL_AMPDU)
412 is_agg = true;
413 is_data_qos = true;
414 }
415
416 /* Copy MAC header from skb into command buffer */
417 memcpy(tx_cmd->hdr, hdr, hdr_len);
418
419 txq_id = info->hw_queue;
420
421 if (is_agg)
422 txq_id = priv->tid_data[sta_id][tid].agg.txq_id;
423 else if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) {
424 /*
425 * The microcode will clear the more data
426 * bit in the last frame it transmits.
427 */
428 hdr->frame_control |=
429 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
430 }
431
432 WARN_ON_ONCE(is_agg &&
433 priv->queue_to_mac80211[txq_id] != info->hw_queue);
434
435 IWL_DEBUG_TX(priv, "TX to [%d|%d] Q:%d - seq: 0x%x\n", sta_id, tid,
436 txq_id, seq_number);
437
438 if (iwl_trans_tx(priv->trans, skb, dev_cmd, txq_id))
439 goto drop_unlock_sta;
440
441 if (is_data_qos && !ieee80211_has_morefrags(fc))
442 priv->tid_data[sta_id][tid].seq_number = seq_number;
443
444 spin_unlock(&priv->sta_lock);
445
446 /*
447 * Avoid atomic ops if it isn't an associated client.
448 * Also, if this is a packet for aggregation, don't
449 * increase the counter because the ucode will stop
450 * aggregation queues when their respective station
451 * goes to sleep.
452 */
453 if (sta_priv && sta_priv->client && !is_agg)
454 atomic_inc(&sta_priv->pending_frames);
455
456 return 0;
457
458 drop_unlock_sta:
459 if (dev_cmd)
460 iwl_trans_free_tx_cmd(priv->trans, dev_cmd);
461 spin_unlock(&priv->sta_lock);
462 drop_unlock_priv:
463 return -1;
464 }
465
466 static int iwlagn_alloc_agg_txq(struct iwl_priv *priv, int mq)
467 {
468 int q;
469
470 for (q = IWLAGN_FIRST_AMPDU_QUEUE;
471 q < priv->trans->trans_cfg->base_params->num_of_queues; q++) {
472 if (!test_and_set_bit(q, priv->agg_q_alloc)) {
473 priv->queue_to_mac80211[q] = mq;
474 return q;
475 }
476 }
477
478 return -ENOSPC;
479 }
480
481 static void iwlagn_dealloc_agg_txq(struct iwl_priv *priv, int q)
482 {
483 clear_bit(q, priv->agg_q_alloc);
484 priv->queue_to_mac80211[q] = IWL_INVALID_MAC80211_QUEUE;
485 }
486
487 int iwlagn_tx_agg_stop(struct iwl_priv *priv, struct ieee80211_vif *vif,
488 struct ieee80211_sta *sta, u16 tid)
489 {
490 struct iwl_tid_data *tid_data;
491 int sta_id, txq_id;
492 enum iwl_agg_state agg_state;
493
494 sta_id = iwl_sta_id(sta);
495
496 if (sta_id == IWL_INVALID_STATION) {
497 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
498 return -ENXIO;
499 }
500
501 spin_lock_bh(&priv->sta_lock);
502
503 tid_data = &priv->tid_data[sta_id][tid];
504 txq_id = tid_data->agg.txq_id;
505
506 switch (tid_data->agg.state) {
507 case IWL_EMPTYING_HW_QUEUE_ADDBA:
508 /*
509 * This can happen if the peer stops aggregation
510 * again before we've had a chance to drain the
511 * queue we selected previously, i.e. before the
512 * session was really started completely.
513 */
514 IWL_DEBUG_HT(priv, "AGG stop before setup done\n");
515 goto turn_off;
516 case IWL_AGG_STARTING:
517 /*
518 * This can happen when the session is stopped before
519 * we receive ADDBA response
520 */
521 IWL_DEBUG_HT(priv, "AGG stop before AGG became operational\n");
522 goto turn_off;
523 case IWL_AGG_ON:
524 break;
525 default:
526 IWL_WARN(priv,
527 "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
528 sta_id, tid, tid_data->agg.state);
529 spin_unlock_bh(&priv->sta_lock);
530 return 0;
531 }
532
533 tid_data->agg.ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
534
535 /* There are still packets for this RA / TID in the HW */
536 if (!test_bit(txq_id, priv->agg_q_alloc)) {
537 IWL_DEBUG_TX_QUEUES(priv,
538 "stopping AGG on STA/TID %d/%d but hwq %d not used\n",
539 sta_id, tid, txq_id);
540 } else if (tid_data->agg.ssn != tid_data->next_reclaimed) {
541 IWL_DEBUG_TX_QUEUES(priv,
542 "Can't proceed: ssn %d, next_recl = %d\n",
543 tid_data->agg.ssn,
544 tid_data->next_reclaimed);
545 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_DELBA;
546 spin_unlock_bh(&priv->sta_lock);
547 return 0;
548 }
549
550 IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d\n",
551 tid_data->agg.ssn);
552 turn_off:
553 agg_state = tid_data->agg.state;
554 tid_data->agg.state = IWL_AGG_OFF;
555
556 spin_unlock_bh(&priv->sta_lock);
557
558 if (test_bit(txq_id, priv->agg_q_alloc)) {
559 /*
560 * If the transport didn't know that we wanted to start
561 * agreggation, don't tell it that we want to stop them.
562 * This can happen when we don't get the addBA response on
563 * time, or we hadn't time to drain the AC queues.
564 */
565 if (agg_state == IWL_AGG_ON)
566 iwl_trans_txq_disable(priv->trans, txq_id, true);
567 else
568 IWL_DEBUG_TX_QUEUES(priv, "Don't disable tx agg: %d\n",
569 agg_state);
570 iwlagn_dealloc_agg_txq(priv, txq_id);
571 }
572
573 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
574
575 return 0;
576 }
577
578 int iwlagn_tx_agg_start(struct iwl_priv *priv, struct ieee80211_vif *vif,
579 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
580 {
581 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
582 struct iwl_tid_data *tid_data;
583 int sta_id, txq_id, ret;
584
585 IWL_DEBUG_HT(priv, "TX AGG request on ra = %pM tid = %d\n",
586 sta->addr, tid);
587
588 sta_id = iwl_sta_id(sta);
589 if (sta_id == IWL_INVALID_STATION) {
590 IWL_ERR(priv, "Start AGG on invalid station\n");
591 return -ENXIO;
592 }
593 if (unlikely(tid >= IWL_MAX_TID_COUNT))
594 return -EINVAL;
595
596 if (priv->tid_data[sta_id][tid].agg.state != IWL_AGG_OFF) {
597 IWL_ERR(priv, "Start AGG when state is not IWL_AGG_OFF !\n");
598 return -ENXIO;
599 }
600
601 txq_id = iwlagn_alloc_agg_txq(priv, ctx->ac_to_queue[tid_to_ac[tid]]);
602 if (txq_id < 0) {
603 IWL_DEBUG_TX_QUEUES(priv,
604 "No free aggregation queue for %pM/%d\n",
605 sta->addr, tid);
606 return txq_id;
607 }
608
609 ret = iwl_sta_tx_modify_enable_tid(priv, sta_id, tid);
610 if (ret)
611 return ret;
612
613 spin_lock_bh(&priv->sta_lock);
614 tid_data = &priv->tid_data[sta_id][tid];
615 tid_data->agg.ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
616 tid_data->agg.txq_id = txq_id;
617
618 *ssn = tid_data->agg.ssn;
619
620 if (*ssn == tid_data->next_reclaimed) {
621 IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d\n",
622 tid_data->agg.ssn);
623 tid_data->agg.state = IWL_AGG_STARTING;
624 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
625 } else {
626 IWL_DEBUG_TX_QUEUES(priv, "Can't proceed: ssn %d, "
627 "next_reclaimed = %d\n",
628 tid_data->agg.ssn,
629 tid_data->next_reclaimed);
630 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA;
631 }
632 spin_unlock_bh(&priv->sta_lock);
633
634 return ret;
635 }
636
637 int iwlagn_tx_agg_flush(struct iwl_priv *priv, struct ieee80211_vif *vif,
638 struct ieee80211_sta *sta, u16 tid)
639 {
640 struct iwl_tid_data *tid_data;
641 enum iwl_agg_state agg_state;
642 int sta_id, txq_id;
643 sta_id = iwl_sta_id(sta);
644
645 /*
646 * First set the agg state to OFF to avoid calling
647 * ieee80211_stop_tx_ba_cb in iwlagn_check_ratid_empty.
648 */
649 spin_lock_bh(&priv->sta_lock);
650
651 tid_data = &priv->tid_data[sta_id][tid];
652 txq_id = tid_data->agg.txq_id;
653 agg_state = tid_data->agg.state;
654 IWL_DEBUG_TX_QUEUES(priv, "Flush AGG: sta %d tid %d q %d state %d\n",
655 sta_id, tid, txq_id, tid_data->agg.state);
656
657 tid_data->agg.state = IWL_AGG_OFF;
658
659 spin_unlock_bh(&priv->sta_lock);
660
661 if (iwlagn_txfifo_flush(priv, BIT(txq_id)))
662 IWL_ERR(priv, "Couldn't flush the AGG queue\n");
663
664 if (test_bit(txq_id, priv->agg_q_alloc)) {
665 /*
666 * If the transport didn't know that we wanted to start
667 * agreggation, don't tell it that we want to stop them.
668 * This can happen when we don't get the addBA response on
669 * time, or we hadn't time to drain the AC queues.
670 */
671 if (agg_state == IWL_AGG_ON)
672 iwl_trans_txq_disable(priv->trans, txq_id, true);
673 else
674 IWL_DEBUG_TX_QUEUES(priv, "Don't disable tx agg: %d\n",
675 agg_state);
676 iwlagn_dealloc_agg_txq(priv, txq_id);
677 }
678
679 return 0;
680 }
681
682 int iwlagn_tx_agg_oper(struct iwl_priv *priv, struct ieee80211_vif *vif,
683 struct ieee80211_sta *sta, u16 tid, u8 buf_size)
684 {
685 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
686 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
687 int q, fifo;
688 u16 ssn;
689
690 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
691
692 spin_lock_bh(&priv->sta_lock);
693 ssn = priv->tid_data[sta_priv->sta_id][tid].agg.ssn;
694 q = priv->tid_data[sta_priv->sta_id][tid].agg.txq_id;
695 priv->tid_data[sta_priv->sta_id][tid].agg.state = IWL_AGG_ON;
696 spin_unlock_bh(&priv->sta_lock);
697
698 fifo = ctx->ac_to_fifo[tid_to_ac[tid]];
699
700 iwl_trans_txq_enable(priv->trans, q, fifo, sta_priv->sta_id, tid,
701 buf_size, ssn, 0);
702
703 /*
704 * If the limit is 0, then it wasn't initialised yet,
705 * use the default. We can do that since we take the
706 * minimum below, and we don't want to go above our
707 * default due to hardware restrictions.
708 */
709 if (sta_priv->max_agg_bufsize == 0)
710 sta_priv->max_agg_bufsize =
711 LINK_QUAL_AGG_FRAME_LIMIT_DEF;
712
713 /*
714 * Even though in theory the peer could have different
715 * aggregation reorder buffer sizes for different sessions,
716 * our ucode doesn't allow for that and has a global limit
717 * for each station. Therefore, use the minimum of all the
718 * aggregation sessions and our default value.
719 */
720 sta_priv->max_agg_bufsize =
721 min(sta_priv->max_agg_bufsize, buf_size);
722
723 if (priv->hw_params.use_rts_for_aggregation) {
724 /*
725 * switch to RTS/CTS if it is the prefer protection
726 * method for HT traffic
727 */
728
729 sta_priv->lq_sta.lq.general_params.flags |=
730 LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
731 }
732 priv->agg_tids_count++;
733 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
734 priv->agg_tids_count);
735
736 sta_priv->lq_sta.lq.agg_params.agg_frame_cnt_limit =
737 sta_priv->max_agg_bufsize;
738
739 IWL_DEBUG_HT(priv, "Tx aggregation enabled on ra = %pM tid = %d\n",
740 sta->addr, tid);
741
742 return iwl_send_lq_cmd(priv, ctx,
743 &sta_priv->lq_sta.lq, CMD_ASYNC, false);
744 }
745
746 static void iwlagn_check_ratid_empty(struct iwl_priv *priv, int sta_id, u8 tid)
747 {
748 struct iwl_tid_data *tid_data = &priv->tid_data[sta_id][tid];
749 enum iwl_rxon_context_id ctx;
750 struct ieee80211_vif *vif;
751 u8 *addr;
752
753 lockdep_assert_held(&priv->sta_lock);
754
755 addr = priv->stations[sta_id].sta.sta.addr;
756 ctx = priv->stations[sta_id].ctxid;
757 vif = priv->contexts[ctx].vif;
758
759 switch (priv->tid_data[sta_id][tid].agg.state) {
760 case IWL_EMPTYING_HW_QUEUE_DELBA:
761 /* There are no packets for this RA / TID in the HW any more */
762 if (tid_data->agg.ssn == tid_data->next_reclaimed) {
763 IWL_DEBUG_TX_QUEUES(priv,
764 "Can continue DELBA flow ssn = next_recl = %d\n",
765 tid_data->next_reclaimed);
766 iwl_trans_txq_disable(priv->trans,
767 tid_data->agg.txq_id, true);
768 iwlagn_dealloc_agg_txq(priv, tid_data->agg.txq_id);
769 tid_data->agg.state = IWL_AGG_OFF;
770 ieee80211_stop_tx_ba_cb_irqsafe(vif, addr, tid);
771 }
772 break;
773 case IWL_EMPTYING_HW_QUEUE_ADDBA:
774 /* There are no packets for this RA / TID in the HW any more */
775 if (tid_data->agg.ssn == tid_data->next_reclaimed) {
776 IWL_DEBUG_TX_QUEUES(priv,
777 "Can continue ADDBA flow ssn = next_recl = %d\n",
778 tid_data->next_reclaimed);
779 tid_data->agg.state = IWL_AGG_STARTING;
780 ieee80211_start_tx_ba_cb_irqsafe(vif, addr, tid);
781 }
782 break;
783 default:
784 break;
785 }
786 }
787
788 static void iwlagn_non_agg_tx_status(struct iwl_priv *priv,
789 struct iwl_rxon_context *ctx,
790 const u8 *addr1)
791 {
792 struct ieee80211_sta *sta;
793 struct iwl_station_priv *sta_priv;
794
795 rcu_read_lock();
796 sta = ieee80211_find_sta(ctx->vif, addr1);
797 if (sta) {
798 sta_priv = (void *)sta->drv_priv;
799 /* avoid atomic ops if this isn't a client */
800 if (sta_priv->client &&
801 atomic_dec_return(&sta_priv->pending_frames) == 0)
802 ieee80211_sta_block_awake(priv->hw, sta, false);
803 }
804 rcu_read_unlock();
805 }
806
807 /**
808 * translate ucode response to mac80211 tx status control values
809 */
810 static void iwlagn_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
811 struct ieee80211_tx_info *info)
812 {
813 struct ieee80211_tx_rate *r = &info->status.rates[0];
814
815 info->status.antenna =
816 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
817 if (rate_n_flags & RATE_MCS_HT_MSK)
818 r->flags |= IEEE80211_TX_RC_MCS;
819 if (rate_n_flags & RATE_MCS_GF_MSK)
820 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
821 if (rate_n_flags & RATE_MCS_HT40_MSK)
822 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
823 if (rate_n_flags & RATE_MCS_DUP_MSK)
824 r->flags |= IEEE80211_TX_RC_DUP_DATA;
825 if (rate_n_flags & RATE_MCS_SGI_MSK)
826 r->flags |= IEEE80211_TX_RC_SHORT_GI;
827 r->idx = iwlagn_hwrate_to_mac80211_idx(rate_n_flags, info->band);
828 }
829
830 #ifdef CONFIG_IWLWIFI_DEBUG
831 const char *iwl_get_tx_fail_reason(u32 status)
832 {
833 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
834 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
835
836 switch (status & TX_STATUS_MSK) {
837 case TX_STATUS_SUCCESS:
838 return "SUCCESS";
839 TX_STATUS_POSTPONE(DELAY);
840 TX_STATUS_POSTPONE(FEW_BYTES);
841 TX_STATUS_POSTPONE(BT_PRIO);
842 TX_STATUS_POSTPONE(QUIET_PERIOD);
843 TX_STATUS_POSTPONE(CALC_TTAK);
844 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
845 TX_STATUS_FAIL(SHORT_LIMIT);
846 TX_STATUS_FAIL(LONG_LIMIT);
847 TX_STATUS_FAIL(FIFO_UNDERRUN);
848 TX_STATUS_FAIL(DRAIN_FLOW);
849 TX_STATUS_FAIL(RFKILL_FLUSH);
850 TX_STATUS_FAIL(LIFE_EXPIRE);
851 TX_STATUS_FAIL(DEST_PS);
852 TX_STATUS_FAIL(HOST_ABORTED);
853 TX_STATUS_FAIL(BT_RETRY);
854 TX_STATUS_FAIL(STA_INVALID);
855 TX_STATUS_FAIL(FRAG_DROPPED);
856 TX_STATUS_FAIL(TID_DISABLE);
857 TX_STATUS_FAIL(FIFO_FLUSHED);
858 TX_STATUS_FAIL(INSUFFICIENT_CF_POLL);
859 TX_STATUS_FAIL(PASSIVE_NO_RX);
860 TX_STATUS_FAIL(NO_BEACON_ON_RADAR);
861 }
862
863 return "UNKNOWN";
864
865 #undef TX_STATUS_FAIL
866 #undef TX_STATUS_POSTPONE
867 }
868 #endif /* CONFIG_IWLWIFI_DEBUG */
869
870 static void iwlagn_count_agg_tx_err_status(struct iwl_priv *priv, u16 status)
871 {
872 status &= AGG_TX_STATUS_MSK;
873
874 switch (status) {
875 case AGG_TX_STATE_UNDERRUN_MSK:
876 priv->reply_agg_tx_stats.underrun++;
877 break;
878 case AGG_TX_STATE_BT_PRIO_MSK:
879 priv->reply_agg_tx_stats.bt_prio++;
880 break;
881 case AGG_TX_STATE_FEW_BYTES_MSK:
882 priv->reply_agg_tx_stats.few_bytes++;
883 break;
884 case AGG_TX_STATE_ABORT_MSK:
885 priv->reply_agg_tx_stats.abort++;
886 break;
887 case AGG_TX_STATE_LAST_SENT_TTL_MSK:
888 priv->reply_agg_tx_stats.last_sent_ttl++;
889 break;
890 case AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK:
891 priv->reply_agg_tx_stats.last_sent_try++;
892 break;
893 case AGG_TX_STATE_LAST_SENT_BT_KILL_MSK:
894 priv->reply_agg_tx_stats.last_sent_bt_kill++;
895 break;
896 case AGG_TX_STATE_SCD_QUERY_MSK:
897 priv->reply_agg_tx_stats.scd_query++;
898 break;
899 case AGG_TX_STATE_TEST_BAD_CRC32_MSK:
900 priv->reply_agg_tx_stats.bad_crc32++;
901 break;
902 case AGG_TX_STATE_RESPONSE_MSK:
903 priv->reply_agg_tx_stats.response++;
904 break;
905 case AGG_TX_STATE_DUMP_TX_MSK:
906 priv->reply_agg_tx_stats.dump_tx++;
907 break;
908 case AGG_TX_STATE_DELAY_TX_MSK:
909 priv->reply_agg_tx_stats.delay_tx++;
910 break;
911 default:
912 priv->reply_agg_tx_stats.unknown++;
913 break;
914 }
915 }
916
917 static inline u32 iwlagn_get_scd_ssn(struct iwlagn_tx_resp *tx_resp)
918 {
919 return le32_to_cpup((__le32 *)&tx_resp->status +
920 tx_resp->frame_count) & IEEE80211_MAX_SN;
921 }
922
923 static void iwl_rx_reply_tx_agg(struct iwl_priv *priv,
924 struct iwlagn_tx_resp *tx_resp)
925 {
926 struct agg_tx_status *frame_status = &tx_resp->status;
927 int tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
928 IWLAGN_TX_RES_TID_POS;
929 int sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
930 IWLAGN_TX_RES_RA_POS;
931 struct iwl_ht_agg *agg = &priv->tid_data[sta_id][tid].agg;
932 u32 status = le16_to_cpu(tx_resp->status.status);
933 int i;
934
935 WARN_ON(tid == IWL_TID_NON_QOS);
936
937 if (agg->wait_for_ba)
938 IWL_DEBUG_TX_REPLY(priv,
939 "got tx response w/o block-ack\n");
940
941 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
942 agg->wait_for_ba = (tx_resp->frame_count > 1);
943
944 /*
945 * If the BT kill count is non-zero, we'll get this
946 * notification again.
947 */
948 if (tx_resp->bt_kill_count && tx_resp->frame_count == 1 &&
949 priv->lib->bt_params &&
950 priv->lib->bt_params->advanced_bt_coexist) {
951 IWL_DEBUG_COEX(priv, "receive reply tx w/ bt_kill\n");
952 }
953
954 if (tx_resp->frame_count == 1)
955 return;
956
957 IWL_DEBUG_TX_REPLY(priv, "TXQ %d initial_rate 0x%x ssn %d frm_cnt %d\n",
958 agg->txq_id,
959 le32_to_cpu(tx_resp->rate_n_flags),
960 iwlagn_get_scd_ssn(tx_resp), tx_resp->frame_count);
961
962 /* Construct bit-map of pending frames within Tx window */
963 for (i = 0; i < tx_resp->frame_count; i++) {
964 u16 fstatus = le16_to_cpu(frame_status[i].status);
965 u8 retry_cnt = (fstatus & AGG_TX_TRY_MSK) >> AGG_TX_TRY_POS;
966
967 if (status & AGG_TX_STATUS_MSK)
968 iwlagn_count_agg_tx_err_status(priv, fstatus);
969
970 if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
971 AGG_TX_STATE_ABORT_MSK))
972 continue;
973
974 if (status & AGG_TX_STATUS_MSK || retry_cnt > 1)
975 IWL_DEBUG_TX_REPLY(priv,
976 "%d: status %s (0x%04x), try-count (0x%01x)\n",
977 i,
978 iwl_get_agg_tx_fail_reason(fstatus),
979 fstatus & AGG_TX_STATUS_MSK,
980 retry_cnt);
981 }
982 }
983
984 #ifdef CONFIG_IWLWIFI_DEBUG
985 #define AGG_TX_STATE_FAIL(x) case AGG_TX_STATE_ ## x: return #x
986
987 const char *iwl_get_agg_tx_fail_reason(u16 status)
988 {
989 status &= AGG_TX_STATUS_MSK;
990 switch (status) {
991 case AGG_TX_STATE_TRANSMITTED:
992 return "SUCCESS";
993 AGG_TX_STATE_FAIL(UNDERRUN_MSK);
994 AGG_TX_STATE_FAIL(BT_PRIO_MSK);
995 AGG_TX_STATE_FAIL(FEW_BYTES_MSK);
996 AGG_TX_STATE_FAIL(ABORT_MSK);
997 AGG_TX_STATE_FAIL(LAST_SENT_TTL_MSK);
998 AGG_TX_STATE_FAIL(LAST_SENT_TRY_CNT_MSK);
999 AGG_TX_STATE_FAIL(LAST_SENT_BT_KILL_MSK);
1000 AGG_TX_STATE_FAIL(SCD_QUERY_MSK);
1001 AGG_TX_STATE_FAIL(TEST_BAD_CRC32_MSK);
1002 AGG_TX_STATE_FAIL(RESPONSE_MSK);
1003 AGG_TX_STATE_FAIL(DUMP_TX_MSK);
1004 AGG_TX_STATE_FAIL(DELAY_TX_MSK);
1005 }
1006
1007 return "UNKNOWN";
1008 }
1009 #endif /* CONFIG_IWLWIFI_DEBUG */
1010
1011 static void iwlagn_count_tx_err_status(struct iwl_priv *priv, u16 status)
1012 {
1013 status &= TX_STATUS_MSK;
1014
1015 switch (status) {
1016 case TX_STATUS_POSTPONE_DELAY:
1017 priv->reply_tx_stats.pp_delay++;
1018 break;
1019 case TX_STATUS_POSTPONE_FEW_BYTES:
1020 priv->reply_tx_stats.pp_few_bytes++;
1021 break;
1022 case TX_STATUS_POSTPONE_BT_PRIO:
1023 priv->reply_tx_stats.pp_bt_prio++;
1024 break;
1025 case TX_STATUS_POSTPONE_QUIET_PERIOD:
1026 priv->reply_tx_stats.pp_quiet_period++;
1027 break;
1028 case TX_STATUS_POSTPONE_CALC_TTAK:
1029 priv->reply_tx_stats.pp_calc_ttak++;
1030 break;
1031 case TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY:
1032 priv->reply_tx_stats.int_crossed_retry++;
1033 break;
1034 case TX_STATUS_FAIL_SHORT_LIMIT:
1035 priv->reply_tx_stats.short_limit++;
1036 break;
1037 case TX_STATUS_FAIL_LONG_LIMIT:
1038 priv->reply_tx_stats.long_limit++;
1039 break;
1040 case TX_STATUS_FAIL_FIFO_UNDERRUN:
1041 priv->reply_tx_stats.fifo_underrun++;
1042 break;
1043 case TX_STATUS_FAIL_DRAIN_FLOW:
1044 priv->reply_tx_stats.drain_flow++;
1045 break;
1046 case TX_STATUS_FAIL_RFKILL_FLUSH:
1047 priv->reply_tx_stats.rfkill_flush++;
1048 break;
1049 case TX_STATUS_FAIL_LIFE_EXPIRE:
1050 priv->reply_tx_stats.life_expire++;
1051 break;
1052 case TX_STATUS_FAIL_DEST_PS:
1053 priv->reply_tx_stats.dest_ps++;
1054 break;
1055 case TX_STATUS_FAIL_HOST_ABORTED:
1056 priv->reply_tx_stats.host_abort++;
1057 break;
1058 case TX_STATUS_FAIL_BT_RETRY:
1059 priv->reply_tx_stats.bt_retry++;
1060 break;
1061 case TX_STATUS_FAIL_STA_INVALID:
1062 priv->reply_tx_stats.sta_invalid++;
1063 break;
1064 case TX_STATUS_FAIL_FRAG_DROPPED:
1065 priv->reply_tx_stats.frag_drop++;
1066 break;
1067 case TX_STATUS_FAIL_TID_DISABLE:
1068 priv->reply_tx_stats.tid_disable++;
1069 break;
1070 case TX_STATUS_FAIL_FIFO_FLUSHED:
1071 priv->reply_tx_stats.fifo_flush++;
1072 break;
1073 case TX_STATUS_FAIL_INSUFFICIENT_CF_POLL:
1074 priv->reply_tx_stats.insuff_cf_poll++;
1075 break;
1076 case TX_STATUS_FAIL_PASSIVE_NO_RX:
1077 priv->reply_tx_stats.fail_hw_drop++;
1078 break;
1079 case TX_STATUS_FAIL_NO_BEACON_ON_RADAR:
1080 priv->reply_tx_stats.sta_color_mismatch++;
1081 break;
1082 default:
1083 priv->reply_tx_stats.unknown++;
1084 break;
1085 }
1086 }
1087
1088 static void iwlagn_set_tx_status(struct iwl_priv *priv,
1089 struct ieee80211_tx_info *info,
1090 struct iwlagn_tx_resp *tx_resp)
1091 {
1092 u16 status = le16_to_cpu(tx_resp->status.status);
1093
1094 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1095
1096 info->status.rates[0].count = tx_resp->failure_frame + 1;
1097 info->flags |= iwl_tx_status_to_mac80211(status);
1098 iwlagn_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
1099 info);
1100 if (!iwl_is_tx_success(status))
1101 iwlagn_count_tx_err_status(priv, status);
1102 }
1103
1104 static void iwl_check_abort_status(struct iwl_priv *priv,
1105 u8 frame_count, u32 status)
1106 {
1107 if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) {
1108 IWL_ERR(priv, "Tx flush command to flush out all frames\n");
1109 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
1110 queue_work(priv->workqueue, &priv->tx_flush);
1111 }
1112 }
1113
1114 void iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb)
1115 {
1116 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1117 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1118 int txq_id = SEQ_TO_QUEUE(sequence);
1119 int cmd_index __maybe_unused = SEQ_TO_INDEX(sequence);
1120 struct iwlagn_tx_resp *tx_resp = (void *)pkt->data;
1121 struct ieee80211_hdr *hdr;
1122 u32 status = le16_to_cpu(tx_resp->status.status);
1123 u16 ssn = iwlagn_get_scd_ssn(tx_resp);
1124 int tid;
1125 int sta_id;
1126 int freed;
1127 struct ieee80211_tx_info *info;
1128 struct sk_buff_head skbs;
1129 struct sk_buff *skb;
1130 struct iwl_rxon_context *ctx;
1131 bool is_agg = (txq_id >= IWLAGN_FIRST_AMPDU_QUEUE);
1132
1133 tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
1134 IWLAGN_TX_RES_TID_POS;
1135 sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
1136 IWLAGN_TX_RES_RA_POS;
1137
1138 spin_lock_bh(&priv->sta_lock);
1139
1140 if (is_agg) {
1141 WARN_ON_ONCE(sta_id >= IWLAGN_STATION_COUNT ||
1142 tid >= IWL_MAX_TID_COUNT);
1143 if (txq_id != priv->tid_data[sta_id][tid].agg.txq_id)
1144 IWL_ERR(priv, "txq_id mismatch: %d %d\n", txq_id,
1145 priv->tid_data[sta_id][tid].agg.txq_id);
1146 iwl_rx_reply_tx_agg(priv, tx_resp);
1147 }
1148
1149 __skb_queue_head_init(&skbs);
1150
1151 if (tx_resp->frame_count == 1) {
1152 u16 next_reclaimed = le16_to_cpu(tx_resp->seq_ctl);
1153 next_reclaimed = IEEE80211_SEQ_TO_SN(next_reclaimed + 0x10);
1154
1155 if (is_agg) {
1156 /* If this is an aggregation queue, we can rely on the
1157 * ssn since the wifi sequence number corresponds to
1158 * the index in the TFD ring (%256).
1159 * The seq_ctl is the sequence control of the packet
1160 * to which this Tx response relates. But if there is a
1161 * hole in the bitmap of the BA we received, this Tx
1162 * response may allow to reclaim the hole and all the
1163 * subsequent packets that were already acked.
1164 * In that case, seq_ctl != ssn, and the next packet
1165 * to be reclaimed will be ssn and not seq_ctl.
1166 */
1167 next_reclaimed = ssn;
1168 }
1169
1170 if (tid != IWL_TID_NON_QOS) {
1171 priv->tid_data[sta_id][tid].next_reclaimed =
1172 next_reclaimed;
1173 IWL_DEBUG_TX_REPLY(priv, "Next reclaimed packet:%d\n",
1174 next_reclaimed);
1175 iwlagn_check_ratid_empty(priv, sta_id, tid);
1176 }
1177
1178 iwl_trans_reclaim(priv->trans, txq_id, ssn, &skbs);
1179
1180 freed = 0;
1181
1182 /* process frames */
1183 skb_queue_walk(&skbs, skb) {
1184 hdr = (struct ieee80211_hdr *)skb->data;
1185
1186 if (!ieee80211_is_data_qos(hdr->frame_control))
1187 priv->last_seq_ctl = tx_resp->seq_ctl;
1188
1189 info = IEEE80211_SKB_CB(skb);
1190 ctx = info->driver_data[0];
1191 iwl_trans_free_tx_cmd(priv->trans,
1192 info->driver_data[1]);
1193
1194 memset(&info->status, 0, sizeof(info->status));
1195
1196 if (status == TX_STATUS_FAIL_PASSIVE_NO_RX &&
1197 ctx->vif &&
1198 ctx->vif->type == NL80211_IFTYPE_STATION) {
1199 /* block and stop all queues */
1200 priv->passive_no_rx = true;
1201 IWL_DEBUG_TX_QUEUES(priv,
1202 "stop all queues: passive channel\n");
1203 ieee80211_stop_queues(priv->hw);
1204
1205 IWL_DEBUG_TX_REPLY(priv,
1206 "TXQ %d status %s (0x%08x) "
1207 "rate_n_flags 0x%x retries %d\n",
1208 txq_id,
1209 iwl_get_tx_fail_reason(status),
1210 status,
1211 le32_to_cpu(tx_resp->rate_n_flags),
1212 tx_resp->failure_frame);
1213
1214 IWL_DEBUG_TX_REPLY(priv,
1215 "FrameCnt = %d, idx=%d\n",
1216 tx_resp->frame_count, cmd_index);
1217 }
1218
1219 /* check if BAR is needed */
1220 if (is_agg && !iwl_is_tx_success(status))
1221 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1222 iwlagn_set_tx_status(priv, IEEE80211_SKB_CB(skb),
1223 tx_resp);
1224 if (!is_agg)
1225 iwlagn_non_agg_tx_status(priv, ctx, hdr->addr1);
1226
1227 freed++;
1228 }
1229
1230 if (tid != IWL_TID_NON_QOS) {
1231 priv->tid_data[sta_id][tid].next_reclaimed =
1232 next_reclaimed;
1233 IWL_DEBUG_TX_REPLY(priv, "Next reclaimed packet:%d\n",
1234 next_reclaimed);
1235 }
1236
1237 if (!is_agg && freed != 1)
1238 IWL_ERR(priv, "Q: %d, freed %d\n", txq_id, freed);
1239
1240 IWL_DEBUG_TX_REPLY(priv, "TXQ %d status %s (0x%08x)\n", txq_id,
1241 iwl_get_tx_fail_reason(status), status);
1242
1243 IWL_DEBUG_TX_REPLY(priv,
1244 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d seq_ctl=0x%x\n",
1245 le32_to_cpu(tx_resp->rate_n_flags),
1246 tx_resp->failure_frame,
1247 SEQ_TO_INDEX(sequence), ssn,
1248 le16_to_cpu(tx_resp->seq_ctl));
1249 }
1250
1251 iwl_check_abort_status(priv, tx_resp->frame_count, status);
1252 spin_unlock_bh(&priv->sta_lock);
1253
1254 while (!skb_queue_empty(&skbs)) {
1255 skb = __skb_dequeue(&skbs);
1256 ieee80211_tx_status(priv->hw, skb);
1257 }
1258 }
1259
1260 /**
1261 * iwlagn_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
1262 *
1263 * Handles block-acknowledge notification from device, which reports success
1264 * of frames sent via aggregation.
1265 */
1266 void iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv,
1267 struct iwl_rx_cmd_buffer *rxb)
1268 {
1269 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1270 struct iwl_compressed_ba_resp *ba_resp = (void *)pkt->data;
1271 struct iwl_ht_agg *agg;
1272 struct sk_buff_head reclaimed_skbs;
1273 struct sk_buff *skb;
1274 int sta_id;
1275 int tid;
1276 int freed;
1277
1278 /* "flow" corresponds to Tx queue */
1279 u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
1280
1281 /* "ssn" is start of block-ack Tx window, corresponds to index
1282 * (in Tx queue's circular buffer) of first TFD/frame in window */
1283 u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
1284
1285 if (scd_flow >= priv->trans->trans_cfg->base_params->num_of_queues) {
1286 IWL_ERR(priv,
1287 "BUG_ON scd_flow is bigger than number of queues\n");
1288 return;
1289 }
1290
1291 sta_id = ba_resp->sta_id;
1292 tid = ba_resp->tid;
1293 agg = &priv->tid_data[sta_id][tid].agg;
1294
1295 spin_lock_bh(&priv->sta_lock);
1296
1297 if (unlikely(!agg->wait_for_ba)) {
1298 if (unlikely(ba_resp->bitmap))
1299 IWL_ERR(priv, "Received BA when not expected\n");
1300 spin_unlock_bh(&priv->sta_lock);
1301 return;
1302 }
1303
1304 if (unlikely(scd_flow != agg->txq_id)) {
1305 /*
1306 * FIXME: this is a uCode bug which need to be addressed,
1307 * log the information and return for now.
1308 * Since it is can possibly happen very often and in order
1309 * not to fill the syslog, don't use IWL_ERR or IWL_WARN
1310 */
1311 IWL_DEBUG_TX_QUEUES(priv,
1312 "Bad queue mapping txq_id=%d, agg_txq[sta:%d,tid:%d]=%d\n",
1313 scd_flow, sta_id, tid, agg->txq_id);
1314 spin_unlock_bh(&priv->sta_lock);
1315 return;
1316 }
1317
1318 __skb_queue_head_init(&reclaimed_skbs);
1319
1320 /* Release all TFDs before the SSN, i.e. all TFDs in front of
1321 * block-ack window (we assume that they've been successfully
1322 * transmitted ... if not, it's too late anyway). */
1323 iwl_trans_reclaim(priv->trans, scd_flow, ba_resp_scd_ssn,
1324 &reclaimed_skbs);
1325
1326 IWL_DEBUG_TX_REPLY(priv, "REPLY_COMPRESSED_BA [%d] Received from %pM, "
1327 "sta_id = %d\n",
1328 agg->wait_for_ba,
1329 (u8 *) &ba_resp->sta_addr_lo32,
1330 ba_resp->sta_id);
1331 IWL_DEBUG_TX_REPLY(priv, "TID = %d, SeqCtl = %d, bitmap = 0x%llx, "
1332 "scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
1333 ba_resp->tid, le16_to_cpu(ba_resp->seq_ctl),
1334 (unsigned long long)le64_to_cpu(ba_resp->bitmap),
1335 scd_flow, ba_resp_scd_ssn, ba_resp->txed,
1336 ba_resp->txed_2_done);
1337
1338 /* Mark that the expected block-ack response arrived */
1339 agg->wait_for_ba = false;
1340
1341 /* Sanity check values reported by uCode */
1342 if (ba_resp->txed_2_done > ba_resp->txed) {
1343 IWL_DEBUG_TX_REPLY(priv,
1344 "bogus sent(%d) and ack(%d) count\n",
1345 ba_resp->txed, ba_resp->txed_2_done);
1346 /*
1347 * set txed_2_done = txed,
1348 * so it won't impact rate scale
1349 */
1350 ba_resp->txed = ba_resp->txed_2_done;
1351 }
1352
1353 priv->tid_data[sta_id][tid].next_reclaimed = ba_resp_scd_ssn;
1354
1355 iwlagn_check_ratid_empty(priv, sta_id, tid);
1356 freed = 0;
1357
1358 skb_queue_walk(&reclaimed_skbs, skb) {
1359 struct ieee80211_hdr *hdr = (void *)skb->data;
1360 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1361
1362 if (ieee80211_is_data_qos(hdr->frame_control))
1363 freed++;
1364 else
1365 WARN_ON_ONCE(1);
1366
1367 iwl_trans_free_tx_cmd(priv->trans, info->driver_data[1]);
1368
1369 memset(&info->status, 0, sizeof(info->status));
1370 /* Packet was transmitted successfully, failures come as single
1371 * frames because before failing a frame the firmware transmits
1372 * it without aggregation at least once.
1373 */
1374 info->flags |= IEEE80211_TX_STAT_ACK;
1375
1376 if (freed == 1) {
1377 /* this is the first skb we deliver in this batch */
1378 /* put the rate scaling data there */
1379 info = IEEE80211_SKB_CB(skb);
1380 memset(&info->status, 0, sizeof(info->status));
1381 info->flags |= IEEE80211_TX_STAT_AMPDU;
1382 info->status.ampdu_ack_len = ba_resp->txed_2_done;
1383 info->status.ampdu_len = ba_resp->txed;
1384 iwlagn_hwrate_to_tx_control(priv, agg->rate_n_flags,
1385 info);
1386 }
1387 }
1388
1389 spin_unlock_bh(&priv->sta_lock);
1390
1391 while (!skb_queue_empty(&reclaimed_skbs)) {
1392 skb = __skb_dequeue(&reclaimed_skbs);
1393 ieee80211_tx_status(priv->hw, skb);
1394 }
1395 }
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