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mac80211: add control port protocol TX control flag
[linux-2.6/btrfs-unstable.git] / drivers / net / wireless / iwlwifi / dvm / tx.c
blobf364583b15351cee3af88b05f24c726c8b27ac5d
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 COPYING.
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->lib->bt_params &&
87 priv->lib->bt_params->advanced_bt_coexist &&
88 (ieee80211_is_auth(fc) || ieee80211_is_assoc_req(fc) ||
89 ieee80211_is_reassoc_req(fc) ||
90 info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO))
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 return;
166 } else if (ieee80211_is_back_req(fc))
167 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
168
169 /**
170 * If the current TX rate stored in mac80211 has the MCS bit set, it's
171 * not really a TX rate. Thus, we use the lowest supported rate for
172 * this band. Also use the lowest supported rate if the stored rate
173 * index is invalid.
174 */
175 rate_idx = info->control.rates[0].idx;
176 if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS ||
177 (rate_idx < 0) || (rate_idx > IWL_RATE_COUNT_LEGACY))
178 rate_idx = rate_lowest_index(
179 &priv->nvm_data->bands[info->band], sta);
180 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
181 if (info->band == IEEE80211_BAND_5GHZ)
182 rate_idx += IWL_FIRST_OFDM_RATE;
183 /* Get PLCP rate for tx_cmd->rate_n_flags */
184 rate_plcp = iwl_rates[rate_idx].plcp;
185 /* Zero out flags for this packet */
186 rate_flags = 0;
187
188 /* Set CCK flag as needed */
189 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
190 rate_flags |= RATE_MCS_CCK_MSK;
191
192 /* Set up antennas */
193 if (priv->lib->bt_params &&
194 priv->lib->bt_params->advanced_bt_coexist &&
195 priv->bt_full_concurrent) {
196 /* operated as 1x1 in full concurrency mode */
197 priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
198 first_antenna(priv->nvm_data->valid_tx_ant));
199 } else
200 priv->mgmt_tx_ant = iwl_toggle_tx_ant(
201 priv, priv->mgmt_tx_ant,
202 priv->nvm_data->valid_tx_ant);
203 rate_flags |= iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
204
205 /* Set the rate in the TX cmd */
206 tx_cmd->rate_n_flags = iwl_hw_set_rate_n_flags(rate_plcp, rate_flags);
207 }
208
209 static void iwlagn_tx_cmd_build_hwcrypto(struct iwl_priv *priv,
210 struct ieee80211_tx_info *info,
211 struct iwl_tx_cmd *tx_cmd,
212 struct sk_buff *skb_frag)
213 {
214 struct ieee80211_key_conf *keyconf = info->control.hw_key;
215
216 switch (keyconf->cipher) {
217 case WLAN_CIPHER_SUITE_CCMP:
218 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
219 memcpy(tx_cmd->key, keyconf->key, keyconf->keylen);
220 if (info->flags & IEEE80211_TX_CTL_AMPDU)
221 tx_cmd->tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
222 break;
223
224 case WLAN_CIPHER_SUITE_TKIP:
225 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
226 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
227 break;
228
229 case WLAN_CIPHER_SUITE_WEP104:
230 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
231 /* fall through */
232 case WLAN_CIPHER_SUITE_WEP40:
233 tx_cmd->sec_ctl |= (TX_CMD_SEC_WEP |
234 (keyconf->keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT);
235
236 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
237
238 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
239 "with key %d\n", keyconf->keyidx);
240 break;
241
242 default:
243 IWL_ERR(priv, "Unknown encode cipher %x\n", keyconf->cipher);
244 break;
245 }
246 }
247
248 /**
249 * iwl_sta_id_or_broadcast - return sta_id or broadcast sta
250 * @context: the current context
251 * @sta: mac80211 station
252 *
253 * In certain circumstances mac80211 passes a station pointer
254 * that may be %NULL, for example during TX or key setup. In
255 * that case, we need to use the broadcast station, so this
256 * inline wraps that pattern.
257 */
258 static int iwl_sta_id_or_broadcast(struct iwl_rxon_context *context,
259 struct ieee80211_sta *sta)
260 {
261 int sta_id;
262
263 if (!sta)
264 return context->bcast_sta_id;
265
266 sta_id = iwl_sta_id(sta);
267
268 /*
269 * mac80211 should not be passing a partially
270 * initialised station!
271 */
272 WARN_ON(sta_id == IWL_INVALID_STATION);
273
274 return sta_id;
275 }
276
277 /*
278 * start REPLY_TX command process
279 */
280 int iwlagn_tx_skb(struct iwl_priv *priv,
281 struct ieee80211_sta *sta,
282 struct sk_buff *skb)
283 {
284 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
285 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
286 struct iwl_station_priv *sta_priv = NULL;
287 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
288 struct iwl_device_cmd *dev_cmd;
289 struct iwl_tx_cmd *tx_cmd;
290 __le16 fc;
291 u8 hdr_len;
292 u16 len, seq_number = 0;
293 u8 sta_id, tid = IWL_MAX_TID_COUNT;
294 bool is_agg = false, is_data_qos = false;
295 int txq_id;
296
297 if (info->control.vif)
298 ctx = iwl_rxon_ctx_from_vif(info->control.vif);
299
300 if (iwl_is_rfkill(priv)) {
301 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
302 goto drop_unlock_priv;
303 }
304
305 fc = hdr->frame_control;
306
307 #ifdef CONFIG_IWLWIFI_DEBUG
308 if (ieee80211_is_auth(fc))
309 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
310 else if (ieee80211_is_assoc_req(fc))
311 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
312 else if (ieee80211_is_reassoc_req(fc))
313 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
314 #endif
315
316 if (unlikely(ieee80211_is_probe_resp(fc))) {
317 struct iwl_wipan_noa_data *noa_data =
318 rcu_dereference(priv->noa_data);
319
320 if (noa_data &&
321 pskb_expand_head(skb, 0, noa_data->length,
322 GFP_ATOMIC) == 0) {
323 memcpy(skb_put(skb, noa_data->length),
324 noa_data->data, noa_data->length);
325 hdr = (struct ieee80211_hdr *)skb->data;
326 }
327 }
328
329 hdr_len = ieee80211_hdrlen(fc);
330
331 /* For management frames use broadcast id to do not break aggregation */
332 if (!ieee80211_is_data(fc))
333 sta_id = ctx->bcast_sta_id;
334 else {
335 /* Find index into station table for destination station */
336 sta_id = iwl_sta_id_or_broadcast(ctx, sta);
337 if (sta_id == IWL_INVALID_STATION) {
338 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
339 hdr->addr1);
340 goto drop_unlock_priv;
341 }
342 }
343
344 if (sta)
345 sta_priv = (void *)sta->drv_priv;
346
347 if (sta_priv && sta_priv->asleep &&
348 (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER)) {
349 /*
350 * This sends an asynchronous command to the device,
351 * but we can rely on it being processed before the
352 * next frame is processed -- and the next frame to
353 * this station is the one that will consume this
354 * counter.
355 * For now set the counter to just 1 since we do not
356 * support uAPSD yet.
357 *
358 * FIXME: If we get two non-bufferable frames one
359 * after the other, we might only send out one of
360 * them because this is racy.
361 */
362 iwl_sta_modify_sleep_tx_count(priv, sta_id, 1);
363 }
364
365 dev_cmd = iwl_trans_alloc_tx_cmd(priv->trans);
366
367 if (unlikely(!dev_cmd))
368 goto drop_unlock_priv;
369
370 memset(dev_cmd, 0, sizeof(*dev_cmd));
371 tx_cmd = (struct iwl_tx_cmd *) dev_cmd->payload;
372
373 /* Total # bytes to be transmitted */
374 len = (u16)skb->len;
375 tx_cmd->len = cpu_to_le16(len);
376
377 if (info->control.hw_key)
378 iwlagn_tx_cmd_build_hwcrypto(priv, info, tx_cmd, skb);
379
380 /* TODO need this for burst mode later on */
381 iwlagn_tx_cmd_build_basic(priv, skb, tx_cmd, info, hdr, sta_id);
382
383 iwlagn_tx_cmd_build_rate(priv, tx_cmd, info, sta, fc);
384
385 memset(&info->status, 0, sizeof(info->status));
386
387 info->driver_data[0] = ctx;
388 info->driver_data[1] = dev_cmd;
389 /* From now on, we cannot access info->control */
390
391 spin_lock(&priv->sta_lock);
392
393 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
394 u8 *qc = NULL;
395 struct iwl_tid_data *tid_data;
396 qc = ieee80211_get_qos_ctl(hdr);
397 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
398 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
399 goto drop_unlock_sta;
400 tid_data = &priv->tid_data[sta_id][tid];
401
402 /* aggregation is on for this <sta,tid> */
403 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
404 tid_data->agg.state != IWL_AGG_ON) {
405 IWL_ERR(priv, "TX_CTL_AMPDU while not in AGG:"
406 " Tx flags = 0x%08x, agg.state = %d",
407 info->flags, tid_data->agg.state);
408 IWL_ERR(priv, "sta_id = %d, tid = %d seq_num = %d",
409 sta_id, tid,
410 IEEE80211_SEQ_TO_SN(tid_data->seq_number));
411 goto drop_unlock_sta;
412 }
413
414 /* We can receive packets from the stack in IWL_AGG_{ON,OFF}
415 * only. Check this here.
416 */
417 if (WARN_ONCE(tid_data->agg.state != IWL_AGG_ON &&
418 tid_data->agg.state != IWL_AGG_OFF,
419 "Tx while agg.state = %d", tid_data->agg.state))
420 goto drop_unlock_sta;
421
422 seq_number = tid_data->seq_number;
423 seq_number &= IEEE80211_SCTL_SEQ;
424 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
425 hdr->seq_ctrl |= cpu_to_le16(seq_number);
426 seq_number += 0x10;
427
428 if (info->flags & IEEE80211_TX_CTL_AMPDU)
429 is_agg = true;
430 is_data_qos = true;
431 }
432
433 /* Copy MAC header from skb into command buffer */
434 memcpy(tx_cmd->hdr, hdr, hdr_len);
435
436 if (is_agg)
437 txq_id = priv->tid_data[sta_id][tid].agg.txq_id;
438 else if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) {
439 /*
440 * Send this frame after DTIM -- there's a special queue
441 * reserved for this for contexts that support AP mode.
442 */
443 txq_id = ctx->mcast_queue;
444
445 /*
446 * The microcode will clear the more data
447 * bit in the last frame it transmits.
448 */
449 hdr->frame_control |=
450 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
451 } else if (info->flags & IEEE80211_TX_CTL_TX_OFFCHAN)
452 txq_id = IWL_AUX_QUEUE;
453 else
454 txq_id = ctx->ac_to_queue[skb_get_queue_mapping(skb)];
455
456 WARN_ON_ONCE(!is_agg && txq_id != info->hw_queue);
457 WARN_ON_ONCE(is_agg &&
458 priv->queue_to_mac80211[txq_id] != info->hw_queue);
459
460 IWL_DEBUG_TX(priv, "TX to [%d|%d] Q:%d - seq: 0x%x\n", sta_id, tid,
461 txq_id, seq_number);
462
463 if (iwl_trans_tx(priv->trans, skb, dev_cmd, txq_id))
464 goto drop_unlock_sta;
465
466 if (is_data_qos && !ieee80211_has_morefrags(fc))
467 priv->tid_data[sta_id][tid].seq_number = seq_number;
468
469 spin_unlock(&priv->sta_lock);
470
471 /*
472 * Avoid atomic ops if it isn't an associated client.
473 * Also, if this is a packet for aggregation, don't
474 * increase the counter because the ucode will stop
475 * aggregation queues when their respective station
476 * goes to sleep.
477 */
478 if (sta_priv && sta_priv->client && !is_agg)
479 atomic_inc(&sta_priv->pending_frames);
480
481 if (info->flags & IEEE80211_TX_CTL_TX_OFFCHAN)
482 iwl_scan_offchannel_skb(priv);
483
484 return 0;
485
486 drop_unlock_sta:
487 if (dev_cmd)
488 iwl_trans_free_tx_cmd(priv->trans, dev_cmd);
489 spin_unlock(&priv->sta_lock);
490 drop_unlock_priv:
491 return -1;
492 }
493
494 static int iwlagn_alloc_agg_txq(struct iwl_priv *priv, int mq)
495 {
496 int q;
497
498 for (q = IWLAGN_FIRST_AMPDU_QUEUE;
499 q < priv->cfg->base_params->num_of_queues; q++) {
500 if (!test_and_set_bit(q, priv->agg_q_alloc)) {
501 priv->queue_to_mac80211[q] = mq;
502 return q;
503 }
504 }
505
506 return -ENOSPC;
507 }
508
509 static void iwlagn_dealloc_agg_txq(struct iwl_priv *priv, int q)
510 {
511 clear_bit(q, priv->agg_q_alloc);
512 priv->queue_to_mac80211[q] = IWL_INVALID_MAC80211_QUEUE;
513 }
514
515 int iwlagn_tx_agg_stop(struct iwl_priv *priv, struct ieee80211_vif *vif,
516 struct ieee80211_sta *sta, u16 tid)
517 {
518 struct iwl_tid_data *tid_data;
519 int sta_id, txq_id;
520 enum iwl_agg_state agg_state;
521
522 sta_id = iwl_sta_id(sta);
523
524 if (sta_id == IWL_INVALID_STATION) {
525 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
526 return -ENXIO;
527 }
528
529 spin_lock_bh(&priv->sta_lock);
530
531 tid_data = &priv->tid_data[sta_id][tid];
532 txq_id = tid_data->agg.txq_id;
533
534 switch (tid_data->agg.state) {
535 case IWL_EMPTYING_HW_QUEUE_ADDBA:
536 /*
537 * This can happen if the peer stops aggregation
538 * again before we've had a chance to drain the
539 * queue we selected previously, i.e. before the
540 * session was really started completely.
541 */
542 IWL_DEBUG_HT(priv, "AGG stop before setup done\n");
543 goto turn_off;
544 case IWL_AGG_STARTING:
545 /*
546 * This can happen when the session is stopped before
547 * we receive ADDBA response
548 */
549 IWL_DEBUG_HT(priv, "AGG stop before AGG became operational\n");
550 goto turn_off;
551 case IWL_AGG_ON:
552 break;
553 default:
554 IWL_WARN(priv,
555 "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
556 sta_id, tid, tid_data->agg.state);
557 spin_unlock_bh(&priv->sta_lock);
558 return 0;
559 }
560
561 tid_data->agg.ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
562
563 /* There are still packets for this RA / TID in the HW */
564 if (!test_bit(txq_id, priv->agg_q_alloc)) {
565 IWL_DEBUG_TX_QUEUES(priv,
566 "stopping AGG on STA/TID %d/%d but hwq %d not used\n",
567 sta_id, tid, txq_id);
568 } else if (tid_data->agg.ssn != tid_data->next_reclaimed) {
569 IWL_DEBUG_TX_QUEUES(priv,
570 "Can't proceed: ssn %d, next_recl = %d\n",
571 tid_data->agg.ssn,
572 tid_data->next_reclaimed);
573 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_DELBA;
574 spin_unlock_bh(&priv->sta_lock);
575 return 0;
576 }
577
578 IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d\n",
579 tid_data->agg.ssn);
580 turn_off:
581 agg_state = tid_data->agg.state;
582 tid_data->agg.state = IWL_AGG_OFF;
583
584 spin_unlock_bh(&priv->sta_lock);
585
586 if (test_bit(txq_id, priv->agg_q_alloc)) {
587 /*
588 * If the transport didn't know that we wanted to start
589 * agreggation, don't tell it that we want to stop them.
590 * This can happen when we don't get the addBA response on
591 * time, or we hadn't time to drain the AC queues.
592 */
593 if (agg_state == IWL_AGG_ON)
594 iwl_trans_txq_disable(priv->trans, txq_id);
595 else
596 IWL_DEBUG_TX_QUEUES(priv, "Don't disable tx agg: %d\n",
597 agg_state);
598 iwlagn_dealloc_agg_txq(priv, txq_id);
599 }
600
601 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
602
603 return 0;
604 }
605
606 int iwlagn_tx_agg_start(struct iwl_priv *priv, struct ieee80211_vif *vif,
607 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
608 {
609 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
610 struct iwl_tid_data *tid_data;
611 int sta_id, txq_id, ret;
612
613 IWL_DEBUG_HT(priv, "TX AGG request on ra = %pM tid = %d\n",
614 sta->addr, tid);
615
616 sta_id = iwl_sta_id(sta);
617 if (sta_id == IWL_INVALID_STATION) {
618 IWL_ERR(priv, "Start AGG on invalid station\n");
619 return -ENXIO;
620 }
621 if (unlikely(tid >= IWL_MAX_TID_COUNT))
622 return -EINVAL;
623
624 if (priv->tid_data[sta_id][tid].agg.state != IWL_AGG_OFF) {
625 IWL_ERR(priv, "Start AGG when state is not IWL_AGG_OFF !\n");
626 return -ENXIO;
627 }
628
629 txq_id = iwlagn_alloc_agg_txq(priv, ctx->ac_to_queue[tid_to_ac[tid]]);
630 if (txq_id < 0) {
631 IWL_DEBUG_TX_QUEUES(priv,
632 "No free aggregation queue for %pM/%d\n",
633 sta->addr, tid);
634 return txq_id;
635 }
636
637 ret = iwl_sta_tx_modify_enable_tid(priv, sta_id, tid);
638 if (ret)
639 return ret;
640
641 spin_lock_bh(&priv->sta_lock);
642 tid_data = &priv->tid_data[sta_id][tid];
643 tid_data->agg.ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
644 tid_data->agg.txq_id = txq_id;
645
646 *ssn = tid_data->agg.ssn;
647
648 if (*ssn == tid_data->next_reclaimed) {
649 IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d\n",
650 tid_data->agg.ssn);
651 tid_data->agg.state = IWL_AGG_STARTING;
652 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
653 } else {
654 IWL_DEBUG_TX_QUEUES(priv, "Can't proceed: ssn %d, "
655 "next_reclaimed = %d\n",
656 tid_data->agg.ssn,
657 tid_data->next_reclaimed);
658 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA;
659 }
660 spin_unlock_bh(&priv->sta_lock);
661
662 return ret;
663 }
664
665 int iwlagn_tx_agg_flush(struct iwl_priv *priv, struct ieee80211_vif *vif,
666 struct ieee80211_sta *sta, u16 tid)
667 {
668 struct iwl_tid_data *tid_data;
669 enum iwl_agg_state agg_state;
670 int sta_id, txq_id;
671 sta_id = iwl_sta_id(sta);
672
673 /*
674 * First set the agg state to OFF to avoid calling
675 * ieee80211_stop_tx_ba_cb in iwlagn_check_ratid_empty.
676 */
677 spin_lock_bh(&priv->sta_lock);
678
679 tid_data = &priv->tid_data[sta_id][tid];
680 txq_id = tid_data->agg.txq_id;
681 agg_state = tid_data->agg.state;
682 IWL_DEBUG_TX_QUEUES(priv, "Flush AGG: sta %d tid %d q %d state %d\n",
683 sta_id, tid, txq_id, tid_data->agg.state);
684
685 tid_data->agg.state = IWL_AGG_OFF;
686
687 spin_unlock_bh(&priv->sta_lock);
688
689 if (iwlagn_txfifo_flush(priv, BIT(txq_id)))
690 IWL_ERR(priv, "Couldn't flush the AGG queue\n");
691
692 if (test_bit(txq_id, priv->agg_q_alloc)) {
693 /*
694 * If the transport didn't know that we wanted to start
695 * agreggation, don't tell it that we want to stop them.
696 * This can happen when we don't get the addBA response on
697 * time, or we hadn't time to drain the AC queues.
698 */
699 if (agg_state == IWL_AGG_ON)
700 iwl_trans_txq_disable(priv->trans, txq_id);
701 else
702 IWL_DEBUG_TX_QUEUES(priv, "Don't disable tx agg: %d\n",
703 agg_state);
704 iwlagn_dealloc_agg_txq(priv, txq_id);
705 }
706
707 return 0;
708 }
709
710 int iwlagn_tx_agg_oper(struct iwl_priv *priv, struct ieee80211_vif *vif,
711 struct ieee80211_sta *sta, u16 tid, u8 buf_size)
712 {
713 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
714 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
715 int q, fifo;
716 u16 ssn;
717
718 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
719
720 spin_lock_bh(&priv->sta_lock);
721 ssn = priv->tid_data[sta_priv->sta_id][tid].agg.ssn;
722 q = priv->tid_data[sta_priv->sta_id][tid].agg.txq_id;
723 priv->tid_data[sta_priv->sta_id][tid].agg.state = IWL_AGG_ON;
724 spin_unlock_bh(&priv->sta_lock);
725
726 fifo = ctx->ac_to_fifo[tid_to_ac[tid]];
727
728 iwl_trans_txq_enable(priv->trans, q, fifo, sta_priv->sta_id, tid,
729 buf_size, ssn);
730
731 /*
732 * If the limit is 0, then it wasn't initialised yet,
733 * use the default. We can do that since we take the
734 * minimum below, and we don't want to go above our
735 * default due to hardware restrictions.
736 */
737 if (sta_priv->max_agg_bufsize == 0)
738 sta_priv->max_agg_bufsize =
739 LINK_QUAL_AGG_FRAME_LIMIT_DEF;
740
741 /*
742 * Even though in theory the peer could have different
743 * aggregation reorder buffer sizes for different sessions,
744 * our ucode doesn't allow for that and has a global limit
745 * for each station. Therefore, use the minimum of all the
746 * aggregation sessions and our default value.
747 */
748 sta_priv->max_agg_bufsize =
749 min(sta_priv->max_agg_bufsize, buf_size);
750
751 if (priv->hw_params.use_rts_for_aggregation) {
752 /*
753 * switch to RTS/CTS if it is the prefer protection
754 * method for HT traffic
755 */
756
757 sta_priv->lq_sta.lq.general_params.flags |=
758 LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
759 }
760 priv->agg_tids_count++;
761 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
762 priv->agg_tids_count);
763
764 sta_priv->lq_sta.lq.agg_params.agg_frame_cnt_limit =
765 sta_priv->max_agg_bufsize;
766
767 IWL_DEBUG_HT(priv, "Tx aggregation enabled on ra = %pM tid = %d\n",
768 sta->addr, tid);
769
770 return iwl_send_lq_cmd(priv, ctx,
771 &sta_priv->lq_sta.lq, CMD_ASYNC, false);
772 }
773
774 static void iwlagn_check_ratid_empty(struct iwl_priv *priv, int sta_id, u8 tid)
775 {
776 struct iwl_tid_data *tid_data = &priv->tid_data[sta_id][tid];
777 enum iwl_rxon_context_id ctx;
778 struct ieee80211_vif *vif;
779 u8 *addr;
780
781 lockdep_assert_held(&priv->sta_lock);
782
783 addr = priv->stations[sta_id].sta.sta.addr;
784 ctx = priv->stations[sta_id].ctxid;
785 vif = priv->contexts[ctx].vif;
786
787 switch (priv->tid_data[sta_id][tid].agg.state) {
788 case IWL_EMPTYING_HW_QUEUE_DELBA:
789 /* There are no packets for this RA / TID in the HW any more */
790 if (tid_data->agg.ssn == tid_data->next_reclaimed) {
791 IWL_DEBUG_TX_QUEUES(priv,
792 "Can continue DELBA flow ssn = next_recl ="
793 " %d", tid_data->next_reclaimed);
794 iwl_trans_txq_disable(priv->trans,
795 tid_data->agg.txq_id);
796 iwlagn_dealloc_agg_txq(priv, tid_data->agg.txq_id);
797 tid_data->agg.state = IWL_AGG_OFF;
798 ieee80211_stop_tx_ba_cb_irqsafe(vif, addr, tid);
799 }
800 break;
801 case IWL_EMPTYING_HW_QUEUE_ADDBA:
802 /* There are no packets for this RA / TID in the HW any more */
803 if (tid_data->agg.ssn == tid_data->next_reclaimed) {
804 IWL_DEBUG_TX_QUEUES(priv,
805 "Can continue ADDBA flow ssn = next_recl ="
806 " %d", tid_data->next_reclaimed);
807 tid_data->agg.state = IWL_AGG_STARTING;
808 ieee80211_start_tx_ba_cb_irqsafe(vif, addr, tid);
809 }
810 break;
811 default:
812 break;
813 }
814 }
815
816 static void iwlagn_non_agg_tx_status(struct iwl_priv *priv,
817 struct iwl_rxon_context *ctx,
818 const u8 *addr1)
819 {
820 struct ieee80211_sta *sta;
821 struct iwl_station_priv *sta_priv;
822
823 rcu_read_lock();
824 sta = ieee80211_find_sta(ctx->vif, addr1);
825 if (sta) {
826 sta_priv = (void *)sta->drv_priv;
827 /* avoid atomic ops if this isn't a client */
828 if (sta_priv->client &&
829 atomic_dec_return(&sta_priv->pending_frames) == 0)
830 ieee80211_sta_block_awake(priv->hw, sta, false);
831 }
832 rcu_read_unlock();
833 }
834
835 /**
836 * translate ucode response to mac80211 tx status control values
837 */
838 static void iwlagn_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
839 struct ieee80211_tx_info *info)
840 {
841 struct ieee80211_tx_rate *r = &info->status.rates[0];
842
843 info->status.antenna =
844 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
845 if (rate_n_flags & RATE_MCS_HT_MSK)
846 r->flags |= IEEE80211_TX_RC_MCS;
847 if (rate_n_flags & RATE_MCS_GF_MSK)
848 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
849 if (rate_n_flags & RATE_MCS_HT40_MSK)
850 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
851 if (rate_n_flags & RATE_MCS_DUP_MSK)
852 r->flags |= IEEE80211_TX_RC_DUP_DATA;
853 if (rate_n_flags & RATE_MCS_SGI_MSK)
854 r->flags |= IEEE80211_TX_RC_SHORT_GI;
855 r->idx = iwlagn_hwrate_to_mac80211_idx(rate_n_flags, info->band);
856 }
857
858 #ifdef CONFIG_IWLWIFI_DEBUG
859 const char *iwl_get_tx_fail_reason(u32 status)
860 {
861 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
862 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
863
864 switch (status & TX_STATUS_MSK) {
865 case TX_STATUS_SUCCESS:
866 return "SUCCESS";
867 TX_STATUS_POSTPONE(DELAY);
868 TX_STATUS_POSTPONE(FEW_BYTES);
869 TX_STATUS_POSTPONE(BT_PRIO);
870 TX_STATUS_POSTPONE(QUIET_PERIOD);
871 TX_STATUS_POSTPONE(CALC_TTAK);
872 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
873 TX_STATUS_FAIL(SHORT_LIMIT);
874 TX_STATUS_FAIL(LONG_LIMIT);
875 TX_STATUS_FAIL(FIFO_UNDERRUN);
876 TX_STATUS_FAIL(DRAIN_FLOW);
877 TX_STATUS_FAIL(RFKILL_FLUSH);
878 TX_STATUS_FAIL(LIFE_EXPIRE);
879 TX_STATUS_FAIL(DEST_PS);
880 TX_STATUS_FAIL(HOST_ABORTED);
881 TX_STATUS_FAIL(BT_RETRY);
882 TX_STATUS_FAIL(STA_INVALID);
883 TX_STATUS_FAIL(FRAG_DROPPED);
884 TX_STATUS_FAIL(TID_DISABLE);
885 TX_STATUS_FAIL(FIFO_FLUSHED);
886 TX_STATUS_FAIL(INSUFFICIENT_CF_POLL);
887 TX_STATUS_FAIL(PASSIVE_NO_RX);
888 TX_STATUS_FAIL(NO_BEACON_ON_RADAR);
889 }
890
891 return "UNKNOWN";
892
893 #undef TX_STATUS_FAIL
894 #undef TX_STATUS_POSTPONE
895 }
896 #endif /* CONFIG_IWLWIFI_DEBUG */
897
898 static void iwlagn_count_agg_tx_err_status(struct iwl_priv *priv, u16 status)
899 {
900 status &= AGG_TX_STATUS_MSK;
901
902 switch (status) {
903 case AGG_TX_STATE_UNDERRUN_MSK:
904 priv->reply_agg_tx_stats.underrun++;
905 break;
906 case AGG_TX_STATE_BT_PRIO_MSK:
907 priv->reply_agg_tx_stats.bt_prio++;
908 break;
909 case AGG_TX_STATE_FEW_BYTES_MSK:
910 priv->reply_agg_tx_stats.few_bytes++;
911 break;
912 case AGG_TX_STATE_ABORT_MSK:
913 priv->reply_agg_tx_stats.abort++;
914 break;
915 case AGG_TX_STATE_LAST_SENT_TTL_MSK:
916 priv->reply_agg_tx_stats.last_sent_ttl++;
917 break;
918 case AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK:
919 priv->reply_agg_tx_stats.last_sent_try++;
920 break;
921 case AGG_TX_STATE_LAST_SENT_BT_KILL_MSK:
922 priv->reply_agg_tx_stats.last_sent_bt_kill++;
923 break;
924 case AGG_TX_STATE_SCD_QUERY_MSK:
925 priv->reply_agg_tx_stats.scd_query++;
926 break;
927 case AGG_TX_STATE_TEST_BAD_CRC32_MSK:
928 priv->reply_agg_tx_stats.bad_crc32++;
929 break;
930 case AGG_TX_STATE_RESPONSE_MSK:
931 priv->reply_agg_tx_stats.response++;
932 break;
933 case AGG_TX_STATE_DUMP_TX_MSK:
934 priv->reply_agg_tx_stats.dump_tx++;
935 break;
936 case AGG_TX_STATE_DELAY_TX_MSK:
937 priv->reply_agg_tx_stats.delay_tx++;
938 break;
939 default:
940 priv->reply_agg_tx_stats.unknown++;
941 break;
942 }
943 }
944
945 static inline u32 iwlagn_get_scd_ssn(struct iwlagn_tx_resp *tx_resp)
946 {
947 return le32_to_cpup((__le32 *)&tx_resp->status +
948 tx_resp->frame_count) & IEEE80211_MAX_SN;
949 }
950
951 static void iwl_rx_reply_tx_agg(struct iwl_priv *priv,
952 struct iwlagn_tx_resp *tx_resp)
953 {
954 struct agg_tx_status *frame_status = &tx_resp->status;
955 int tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
956 IWLAGN_TX_RES_TID_POS;
957 int sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
958 IWLAGN_TX_RES_RA_POS;
959 struct iwl_ht_agg *agg = &priv->tid_data[sta_id][tid].agg;
960 u32 status = le16_to_cpu(tx_resp->status.status);
961 int i;
962
963 WARN_ON(tid == IWL_TID_NON_QOS);
964
965 if (agg->wait_for_ba)
966 IWL_DEBUG_TX_REPLY(priv,
967 "got tx response w/o block-ack\n");
968
969 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
970 agg->wait_for_ba = (tx_resp->frame_count > 1);
971
972 /*
973 * If the BT kill count is non-zero, we'll get this
974 * notification again.
975 */
976 if (tx_resp->bt_kill_count && tx_resp->frame_count == 1 &&
977 priv->lib->bt_params &&
978 priv->lib->bt_params->advanced_bt_coexist) {
979 IWL_DEBUG_COEX(priv, "receive reply tx w/ bt_kill\n");
980 }
981
982 if (tx_resp->frame_count == 1)
983 return;
984
985 IWL_DEBUG_TX_REPLY(priv, "TXQ %d initial_rate 0x%x ssn %d frm_cnt %d\n",
986 agg->txq_id,
987 le32_to_cpu(tx_resp->rate_n_flags),
988 iwlagn_get_scd_ssn(tx_resp), tx_resp->frame_count);
989
990 /* Construct bit-map of pending frames within Tx window */
991 for (i = 0; i < tx_resp->frame_count; i++) {
992 u16 fstatus = le16_to_cpu(frame_status[i].status);
993 u8 retry_cnt = (fstatus & AGG_TX_TRY_MSK) >> AGG_TX_TRY_POS;
994
995 if (status & AGG_TX_STATUS_MSK)
996 iwlagn_count_agg_tx_err_status(priv, fstatus);
997
998 if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
999 AGG_TX_STATE_ABORT_MSK))
1000 continue;
1001
1002 if (status & AGG_TX_STATUS_MSK || retry_cnt > 1)
1003 IWL_DEBUG_TX_REPLY(priv,
1004 "%d: status %s (0x%04x), try-count (0x%01x)\n",
1005 i,
1006 iwl_get_agg_tx_fail_reason(fstatus),
1007 fstatus & AGG_TX_STATUS_MSK,
1008 retry_cnt);
1009 }
1010 }
1011
1012 #ifdef CONFIG_IWLWIFI_DEBUG
1013 #define AGG_TX_STATE_FAIL(x) case AGG_TX_STATE_ ## x: return #x
1014
1015 const char *iwl_get_agg_tx_fail_reason(u16 status)
1016 {
1017 status &= AGG_TX_STATUS_MSK;
1018 switch (status) {
1019 case AGG_TX_STATE_TRANSMITTED:
1020 return "SUCCESS";
1021 AGG_TX_STATE_FAIL(UNDERRUN_MSK);
1022 AGG_TX_STATE_FAIL(BT_PRIO_MSK);
1023 AGG_TX_STATE_FAIL(FEW_BYTES_MSK);
1024 AGG_TX_STATE_FAIL(ABORT_MSK);
1025 AGG_TX_STATE_FAIL(LAST_SENT_TTL_MSK);
1026 AGG_TX_STATE_FAIL(LAST_SENT_TRY_CNT_MSK);
1027 AGG_TX_STATE_FAIL(LAST_SENT_BT_KILL_MSK);
1028 AGG_TX_STATE_FAIL(SCD_QUERY_MSK);
1029 AGG_TX_STATE_FAIL(TEST_BAD_CRC32_MSK);
1030 AGG_TX_STATE_FAIL(RESPONSE_MSK);
1031 AGG_TX_STATE_FAIL(DUMP_TX_MSK);
1032 AGG_TX_STATE_FAIL(DELAY_TX_MSK);
1033 }
1034
1035 return "UNKNOWN";
1036 }
1037 #endif /* CONFIG_IWLWIFI_DEBUG */
1038
1039 static void iwlagn_count_tx_err_status(struct iwl_priv *priv, u16 status)
1040 {
1041 status &= TX_STATUS_MSK;
1042
1043 switch (status) {
1044 case TX_STATUS_POSTPONE_DELAY:
1045 priv->reply_tx_stats.pp_delay++;
1046 break;
1047 case TX_STATUS_POSTPONE_FEW_BYTES:
1048 priv->reply_tx_stats.pp_few_bytes++;
1049 break;
1050 case TX_STATUS_POSTPONE_BT_PRIO:
1051 priv->reply_tx_stats.pp_bt_prio++;
1052 break;
1053 case TX_STATUS_POSTPONE_QUIET_PERIOD:
1054 priv->reply_tx_stats.pp_quiet_period++;
1055 break;
1056 case TX_STATUS_POSTPONE_CALC_TTAK:
1057 priv->reply_tx_stats.pp_calc_ttak++;
1058 break;
1059 case TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY:
1060 priv->reply_tx_stats.int_crossed_retry++;
1061 break;
1062 case TX_STATUS_FAIL_SHORT_LIMIT:
1063 priv->reply_tx_stats.short_limit++;
1064 break;
1065 case TX_STATUS_FAIL_LONG_LIMIT:
1066 priv->reply_tx_stats.long_limit++;
1067 break;
1068 case TX_STATUS_FAIL_FIFO_UNDERRUN:
1069 priv->reply_tx_stats.fifo_underrun++;
1070 break;
1071 case TX_STATUS_FAIL_DRAIN_FLOW:
1072 priv->reply_tx_stats.drain_flow++;
1073 break;
1074 case TX_STATUS_FAIL_RFKILL_FLUSH:
1075 priv->reply_tx_stats.rfkill_flush++;
1076 break;
1077 case TX_STATUS_FAIL_LIFE_EXPIRE:
1078 priv->reply_tx_stats.life_expire++;
1079 break;
1080 case TX_STATUS_FAIL_DEST_PS:
1081 priv->reply_tx_stats.dest_ps++;
1082 break;
1083 case TX_STATUS_FAIL_HOST_ABORTED:
1084 priv->reply_tx_stats.host_abort++;
1085 break;
1086 case TX_STATUS_FAIL_BT_RETRY:
1087 priv->reply_tx_stats.bt_retry++;
1088 break;
1089 case TX_STATUS_FAIL_STA_INVALID:
1090 priv->reply_tx_stats.sta_invalid++;
1091 break;
1092 case TX_STATUS_FAIL_FRAG_DROPPED:
1093 priv->reply_tx_stats.frag_drop++;
1094 break;
1095 case TX_STATUS_FAIL_TID_DISABLE:
1096 priv->reply_tx_stats.tid_disable++;
1097 break;
1098 case TX_STATUS_FAIL_FIFO_FLUSHED:
1099 priv->reply_tx_stats.fifo_flush++;
1100 break;
1101 case TX_STATUS_FAIL_INSUFFICIENT_CF_POLL:
1102 priv->reply_tx_stats.insuff_cf_poll++;
1103 break;
1104 case TX_STATUS_FAIL_PASSIVE_NO_RX:
1105 priv->reply_tx_stats.fail_hw_drop++;
1106 break;
1107 case TX_STATUS_FAIL_NO_BEACON_ON_RADAR:
1108 priv->reply_tx_stats.sta_color_mismatch++;
1109 break;
1110 default:
1111 priv->reply_tx_stats.unknown++;
1112 break;
1113 }
1114 }
1115
1116 static void iwlagn_set_tx_status(struct iwl_priv *priv,
1117 struct ieee80211_tx_info *info,
1118 struct iwlagn_tx_resp *tx_resp)
1119 {
1120 u16 status = le16_to_cpu(tx_resp->status.status);
1121
1122 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1123
1124 info->status.rates[0].count = tx_resp->failure_frame + 1;
1125 info->flags |= iwl_tx_status_to_mac80211(status);
1126 iwlagn_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
1127 info);
1128 if (!iwl_is_tx_success(status))
1129 iwlagn_count_tx_err_status(priv, status);
1130 }
1131
1132 static void iwl_check_abort_status(struct iwl_priv *priv,
1133 u8 frame_count, u32 status)
1134 {
1135 if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) {
1136 IWL_ERR(priv, "Tx flush command to flush out all frames\n");
1137 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
1138 queue_work(priv->workqueue, &priv->tx_flush);
1139 }
1140 }
1141
1142 int iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb,
1143 struct iwl_device_cmd *cmd)
1144 {
1145 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1146 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1147 int txq_id = SEQ_TO_QUEUE(sequence);
1148 int cmd_index __maybe_unused = SEQ_TO_INDEX(sequence);
1149 struct iwlagn_tx_resp *tx_resp = (void *)pkt->data;
1150 struct ieee80211_hdr *hdr;
1151 u32 status = le16_to_cpu(tx_resp->status.status);
1152 u16 ssn = iwlagn_get_scd_ssn(tx_resp);
1153 int tid;
1154 int sta_id;
1155 int freed;
1156 struct ieee80211_tx_info *info;
1157 struct sk_buff_head skbs;
1158 struct sk_buff *skb;
1159 struct iwl_rxon_context *ctx;
1160 bool is_agg = (txq_id >= IWLAGN_FIRST_AMPDU_QUEUE);
1161 bool is_offchannel_skb;
1162
1163 tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
1164 IWLAGN_TX_RES_TID_POS;
1165 sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
1166 IWLAGN_TX_RES_RA_POS;
1167
1168 spin_lock_bh(&priv->sta_lock);
1169
1170 if (is_agg) {
1171 WARN_ON_ONCE(sta_id >= IWLAGN_STATION_COUNT ||
1172 tid >= IWL_MAX_TID_COUNT);
1173 if (txq_id != priv->tid_data[sta_id][tid].agg.txq_id)
1174 IWL_ERR(priv, "txq_id mismatch: %d %d\n", txq_id,
1175 priv->tid_data[sta_id][tid].agg.txq_id);
1176 iwl_rx_reply_tx_agg(priv, tx_resp);
1177 }
1178
1179 __skb_queue_head_init(&skbs);
1180
1181 is_offchannel_skb = false;
1182
1183 if (tx_resp->frame_count == 1) {
1184 u16 next_reclaimed = le16_to_cpu(tx_resp->seq_ctl);
1185 next_reclaimed = IEEE80211_SEQ_TO_SN(next_reclaimed + 0x10);
1186
1187 if (is_agg) {
1188 /* If this is an aggregation queue, we can rely on the
1189 * ssn since the wifi sequence number corresponds to
1190 * the index in the TFD ring (%256).
1191 * The seq_ctl is the sequence control of the packet
1192 * to which this Tx response relates. But if there is a
1193 * hole in the bitmap of the BA we received, this Tx
1194 * response may allow to reclaim the hole and all the
1195 * subsequent packets that were already acked.
1196 * In that case, seq_ctl != ssn, and the next packet
1197 * to be reclaimed will be ssn and not seq_ctl.
1198 */
1199 next_reclaimed = ssn;
1200 }
1201
1202 if (tid != IWL_TID_NON_QOS) {
1203 priv->tid_data[sta_id][tid].next_reclaimed =
1204 next_reclaimed;
1205 IWL_DEBUG_TX_REPLY(priv, "Next reclaimed packet:%d\n",
1206 next_reclaimed);
1207 }
1208
1209 iwl_trans_reclaim(priv->trans, txq_id, ssn, &skbs);
1210
1211 iwlagn_check_ratid_empty(priv, sta_id, tid);
1212 freed = 0;
1213
1214 /* process frames */
1215 skb_queue_walk(&skbs, skb) {
1216 hdr = (struct ieee80211_hdr *)skb->data;
1217
1218 if (!ieee80211_is_data_qos(hdr->frame_control))
1219 priv->last_seq_ctl = tx_resp->seq_ctl;
1220
1221 info = IEEE80211_SKB_CB(skb);
1222 ctx = info->driver_data[0];
1223 iwl_trans_free_tx_cmd(priv->trans,
1224 info->driver_data[1]);
1225
1226 memset(&info->status, 0, sizeof(info->status));
1227
1228 if (status == TX_STATUS_FAIL_PASSIVE_NO_RX &&
1229 ctx->vif &&
1230 ctx->vif->type == NL80211_IFTYPE_STATION) {
1231 /* block and stop all queues */
1232 priv->passive_no_rx = true;
1233 IWL_DEBUG_TX_QUEUES(priv, "stop all queues: "
1234 "passive channel");
1235 ieee80211_stop_queues(priv->hw);
1236
1237 IWL_DEBUG_TX_REPLY(priv,
1238 "TXQ %d status %s (0x%08x) "
1239 "rate_n_flags 0x%x retries %d\n",
1240 txq_id,
1241 iwl_get_tx_fail_reason(status),
1242 status,
1243 le32_to_cpu(tx_resp->rate_n_flags),
1244 tx_resp->failure_frame);
1245
1246 IWL_DEBUG_TX_REPLY(priv,
1247 "FrameCnt = %d, idx=%d\n",
1248 tx_resp->frame_count, cmd_index);
1249 }
1250
1251 /* check if BAR is needed */
1252 if (is_agg && !iwl_is_tx_success(status))
1253 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1254 iwlagn_set_tx_status(priv, IEEE80211_SKB_CB(skb),
1255 tx_resp);
1256 if (!is_agg)
1257 iwlagn_non_agg_tx_status(priv, ctx, hdr->addr1);
1258
1259 is_offchannel_skb =
1260 (info->flags & IEEE80211_TX_CTL_TX_OFFCHAN);
1261 freed++;
1262 }
1263
1264 if (tid != IWL_TID_NON_QOS) {
1265 priv->tid_data[sta_id][tid].next_reclaimed =
1266 next_reclaimed;
1267 IWL_DEBUG_TX_REPLY(priv, "Next reclaimed packet:%d\n",
1268 next_reclaimed);
1269 }
1270
1271 if (!is_agg && freed != 1)
1272 IWL_ERR(priv, "Q: %d, freed %d\n", txq_id, freed);
1273
1274 /*
1275 * An offchannel frame can be send only on the AUX queue, where
1276 * there is no aggregation (and reordering) so it only is single
1277 * skb is expected to be processed.
1278 */
1279 if (is_offchannel_skb && freed != 1)
1280 IWL_ERR(priv, "OFFCHANNEL SKB freed %d\n", freed);
1281
1282 IWL_DEBUG_TX_REPLY(priv, "TXQ %d status %s (0x%08x)\n", txq_id,
1283 iwl_get_tx_fail_reason(status), status);
1284
1285 IWL_DEBUG_TX_REPLY(priv,
1286 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d seq_ctl=0x%x\n",
1287 le32_to_cpu(tx_resp->rate_n_flags),
1288 tx_resp->failure_frame,
1289 SEQ_TO_INDEX(sequence), ssn,
1290 le16_to_cpu(tx_resp->seq_ctl));
1291 }
1292
1293 iwl_check_abort_status(priv, tx_resp->frame_count, status);
1294 spin_unlock_bh(&priv->sta_lock);
1295
1296 while (!skb_queue_empty(&skbs)) {
1297 skb = __skb_dequeue(&skbs);
1298 ieee80211_tx_status_ni(priv->hw, skb);
1299 }
1300
1301 if (is_offchannel_skb)
1302 iwl_scan_offchannel_skb_status(priv);
1303
1304 return 0;
1305 }
1306
1307 /**
1308 * iwlagn_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
1309 *
1310 * Handles block-acknowledge notification from device, which reports success
1311 * of frames sent via aggregation.
1312 */
1313 int iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv,
1314 struct iwl_rx_cmd_buffer *rxb,
1315 struct iwl_device_cmd *cmd)
1316 {
1317 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1318 struct iwl_compressed_ba_resp *ba_resp = (void *)pkt->data;
1319 struct iwl_ht_agg *agg;
1320 struct sk_buff_head reclaimed_skbs;
1321 struct ieee80211_tx_info *info;
1322 struct ieee80211_hdr *hdr;
1323 struct sk_buff *skb;
1324 int sta_id;
1325 int tid;
1326 int freed;
1327
1328 /* "flow" corresponds to Tx queue */
1329 u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
1330
1331 /* "ssn" is start of block-ack Tx window, corresponds to index
1332 * (in Tx queue's circular buffer) of first TFD/frame in window */
1333 u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
1334
1335 if (scd_flow >= priv->cfg->base_params->num_of_queues) {
1336 IWL_ERR(priv,
1337 "BUG_ON scd_flow is bigger than number of queues\n");
1338 return 0;
1339 }
1340
1341 sta_id = ba_resp->sta_id;
1342 tid = ba_resp->tid;
1343 agg = &priv->tid_data[sta_id][tid].agg;
1344
1345 spin_lock_bh(&priv->sta_lock);
1346
1347 if (unlikely(!agg->wait_for_ba)) {
1348 if (unlikely(ba_resp->bitmap))
1349 IWL_ERR(priv, "Received BA when not expected\n");
1350 spin_unlock_bh(&priv->sta_lock);
1351 return 0;
1352 }
1353
1354 if (unlikely(scd_flow != agg->txq_id)) {
1355 /*
1356 * FIXME: this is a uCode bug which need to be addressed,
1357 * log the information and return for now.
1358 * Since it is can possibly happen very often and in order
1359 * not to fill the syslog, don't use IWL_ERR or IWL_WARN
1360 */
1361 IWL_DEBUG_TX_QUEUES(priv,
1362 "Bad queue mapping txq_id=%d, agg_txq[sta:%d,tid:%d]=%d\n",
1363 scd_flow, sta_id, tid, agg->txq_id);
1364 spin_unlock_bh(&priv->sta_lock);
1365 return 0;
1366 }
1367
1368 __skb_queue_head_init(&reclaimed_skbs);
1369
1370 /* Release all TFDs before the SSN, i.e. all TFDs in front of
1371 * block-ack window (we assume that they've been successfully
1372 * transmitted ... if not, it's too late anyway). */
1373 iwl_trans_reclaim(priv->trans, scd_flow, ba_resp_scd_ssn,
1374 &reclaimed_skbs);
1375
1376 IWL_DEBUG_TX_REPLY(priv, "REPLY_COMPRESSED_BA [%d] Received from %pM, "
1377 "sta_id = %d\n",
1378 agg->wait_for_ba,
1379 (u8 *) &ba_resp->sta_addr_lo32,
1380 ba_resp->sta_id);
1381 IWL_DEBUG_TX_REPLY(priv, "TID = %d, SeqCtl = %d, bitmap = 0x%llx, "
1382 "scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
1383 ba_resp->tid, le16_to_cpu(ba_resp->seq_ctl),
1384 (unsigned long long)le64_to_cpu(ba_resp->bitmap),
1385 scd_flow, ba_resp_scd_ssn, ba_resp->txed,
1386 ba_resp->txed_2_done);
1387
1388 /* Mark that the expected block-ack response arrived */
1389 agg->wait_for_ba = false;
1390
1391 /* Sanity check values reported by uCode */
1392 if (ba_resp->txed_2_done > ba_resp->txed) {
1393 IWL_DEBUG_TX_REPLY(priv,
1394 "bogus sent(%d) and ack(%d) count\n",
1395 ba_resp->txed, ba_resp->txed_2_done);
1396 /*
1397 * set txed_2_done = txed,
1398 * so it won't impact rate scale
1399 */
1400 ba_resp->txed = ba_resp->txed_2_done;
1401 }
1402
1403 priv->tid_data[sta_id][tid].next_reclaimed = ba_resp_scd_ssn;
1404
1405 iwlagn_check_ratid_empty(priv, sta_id, tid);
1406 freed = 0;
1407
1408 skb_queue_walk(&reclaimed_skbs, skb) {
1409 hdr = (struct ieee80211_hdr *)skb->data;
1410
1411 if (ieee80211_is_data_qos(hdr->frame_control))
1412 freed++;
1413 else
1414 WARN_ON_ONCE(1);
1415
1416 info = IEEE80211_SKB_CB(skb);
1417 iwl_trans_free_tx_cmd(priv->trans, info->driver_data[1]);
1418
1419 if (freed == 1) {
1420 /* this is the first skb we deliver in this batch */
1421 /* put the rate scaling data there */
1422 info = IEEE80211_SKB_CB(skb);
1423 memset(&info->status, 0, sizeof(info->status));
1424 info->flags |= IEEE80211_TX_STAT_ACK;
1425 info->flags |= IEEE80211_TX_STAT_AMPDU;
1426 info->status.ampdu_ack_len = ba_resp->txed_2_done;
1427 info->status.ampdu_len = ba_resp->txed;
1428 iwlagn_hwrate_to_tx_control(priv, agg->rate_n_flags,
1429 info);
1430 }
1431 }
1432
1433 spin_unlock_bh(&priv->sta_lock);
1434
1435 while (!skb_queue_empty(&reclaimed_skbs)) {
1436 skb = __skb_dequeue(&reclaimed_skbs);
1437 ieee80211_tx_status_ni(priv->hw, skb);
1438 }
1439
1440 return 0;
1441 }
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