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iwlwifi: split between AGG_ON and AGG_STARTING
[deliverable/linux.git] / drivers / net / wireless / iwlwifi / iwl-agn-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
36 #include "iwl-dev.h"
37 #include "iwl-core.h"
38 #include "iwl-io.h"
39 #include "iwl-agn-hw.h"
40 #include "iwl-agn.h"
41 #include "iwl-trans.h"
42
43 static const u8 tid_to_ac[] = {
44 IEEE80211_AC_BE,
45 IEEE80211_AC_BK,
46 IEEE80211_AC_BK,
47 IEEE80211_AC_BE,
48 IEEE80211_AC_VI,
49 IEEE80211_AC_VI,
50 IEEE80211_AC_VO,
51 IEEE80211_AC_VO,
52 };
53
54 static void iwlagn_tx_cmd_protection(struct iwl_priv *priv,
55 struct ieee80211_tx_info *info,
56 __le16 fc, __le32 *tx_flags)
57 {
58 if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS ||
59 info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT ||
60 info->flags & IEEE80211_TX_CTL_AMPDU)
61 *tx_flags |= TX_CMD_FLG_PROT_REQUIRE_MSK;
62 }
63
64 /*
65 * handle build REPLY_TX command notification.
66 */
67 static void iwlagn_tx_cmd_build_basic(struct iwl_priv *priv,
68 struct sk_buff *skb,
69 struct iwl_tx_cmd *tx_cmd,
70 struct ieee80211_tx_info *info,
71 struct ieee80211_hdr *hdr, u8 sta_id)
72 {
73 __le16 fc = hdr->frame_control;
74 __le32 tx_flags = tx_cmd->tx_flags;
75
76 tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
77
78 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
79 tx_flags |= TX_CMD_FLG_ACK_MSK;
80 else
81 tx_flags &= ~TX_CMD_FLG_ACK_MSK;
82
83 if (ieee80211_is_probe_resp(fc))
84 tx_flags |= TX_CMD_FLG_TSF_MSK;
85 else if (ieee80211_is_back_req(fc))
86 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK;
87 else if (info->band == IEEE80211_BAND_2GHZ &&
88 priv->cfg->bt_params &&
89 priv->cfg->bt_params->advanced_bt_coexist &&
90 (ieee80211_is_auth(fc) || ieee80211_is_assoc_req(fc) ||
91 ieee80211_is_reassoc_req(fc) ||
92 skb->protocol == cpu_to_be16(ETH_P_PAE)))
93 tx_flags |= TX_CMD_FLG_IGNORE_BT;
94
95
96 tx_cmd->sta_id = sta_id;
97 if (ieee80211_has_morefrags(fc))
98 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
99
100 if (ieee80211_is_data_qos(fc)) {
101 u8 *qc = ieee80211_get_qos_ctl(hdr);
102 tx_cmd->tid_tspec = qc[0] & 0xf;
103 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
104 } else {
105 tx_cmd->tid_tspec = IWL_TID_NON_QOS;
106 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
107 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
108 else
109 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
110 }
111
112 iwlagn_tx_cmd_protection(priv, info, fc, &tx_flags);
113
114 tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
115 if (ieee80211_is_mgmt(fc)) {
116 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
117 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
118 else
119 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
120 } else {
121 tx_cmd->timeout.pm_frame_timeout = 0;
122 }
123
124 tx_cmd->driver_txop = 0;
125 tx_cmd->tx_flags = tx_flags;
126 tx_cmd->next_frame_len = 0;
127 }
128
129 static void iwlagn_tx_cmd_build_rate(struct iwl_priv *priv,
130 struct iwl_tx_cmd *tx_cmd,
131 struct ieee80211_tx_info *info,
132 __le16 fc)
133 {
134 u32 rate_flags;
135 int rate_idx;
136 u8 rts_retry_limit;
137 u8 data_retry_limit;
138 u8 rate_plcp;
139
140 if (priv->wowlan) {
141 rts_retry_limit = IWLAGN_LOW_RETRY_LIMIT;
142 data_retry_limit = IWLAGN_LOW_RETRY_LIMIT;
143 } else {
144 /* Set retry limit on RTS packets */
145 rts_retry_limit = IWLAGN_RTS_DFAULT_RETRY_LIMIT;
146
147 /* Set retry limit on DATA packets and Probe Responses*/
148 if (ieee80211_is_probe_resp(fc)) {
149 data_retry_limit = IWLAGN_MGMT_DFAULT_RETRY_LIMIT;
150 rts_retry_limit =
151 min(data_retry_limit, rts_retry_limit);
152 } else if (ieee80211_is_back_req(fc))
153 data_retry_limit = IWLAGN_BAR_DFAULT_RETRY_LIMIT;
154 else
155 data_retry_limit = IWLAGN_DEFAULT_TX_RETRY;
156 }
157
158 tx_cmd->data_retry_limit = data_retry_limit;
159 tx_cmd->rts_retry_limit = rts_retry_limit;
160
161 /* DATA packets will use the uCode station table for rate/antenna
162 * selection */
163 if (ieee80211_is_data(fc)) {
164 tx_cmd->initial_rate_index = 0;
165 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
166 #ifdef CONFIG_IWLWIFI_DEVICE_TESTMODE
167 if (priv->tm_fixed_rate) {
168 /*
169 * rate overwrite by testmode
170 * we not only send lq command to change rate
171 * we also re-enforce per data pkt base.
172 */
173 tx_cmd->tx_flags &= ~TX_CMD_FLG_STA_RATE_MSK;
174 memcpy(&tx_cmd->rate_n_flags, &priv->tm_fixed_rate,
175 sizeof(tx_cmd->rate_n_flags));
176 }
177 #endif
178 return;
179 } else if (ieee80211_is_back_req(fc))
180 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
181
182 /**
183 * If the current TX rate stored in mac80211 has the MCS bit set, it's
184 * not really a TX rate. Thus, we use the lowest supported rate for
185 * this band. Also use the lowest supported rate if the stored rate
186 * index is invalid.
187 */
188 rate_idx = info->control.rates[0].idx;
189 if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS ||
190 (rate_idx < 0) || (rate_idx > IWL_RATE_COUNT_LEGACY))
191 rate_idx = rate_lowest_index(&priv->bands[info->band],
192 info->control.sta);
193 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
194 if (info->band == IEEE80211_BAND_5GHZ)
195 rate_idx += IWL_FIRST_OFDM_RATE;
196 /* Get PLCP rate for tx_cmd->rate_n_flags */
197 rate_plcp = iwl_rates[rate_idx].plcp;
198 /* Zero out flags for this packet */
199 rate_flags = 0;
200
201 /* Set CCK flag as needed */
202 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
203 rate_flags |= RATE_MCS_CCK_MSK;
204
205 /* Set up antennas */
206 if (priv->cfg->bt_params &&
207 priv->cfg->bt_params->advanced_bt_coexist &&
208 priv->bt_full_concurrent) {
209 /* operated as 1x1 in full concurrency mode */
210 priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
211 first_antenna(priv->hw_params.valid_tx_ant));
212 } else
213 priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
214 priv->hw_params.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, struct sk_buff *skb)
295 {
296 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
297 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
298 struct iwl_station_priv *sta_priv = NULL;
299 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
300 struct iwl_device_cmd *dev_cmd = NULL;
301 struct iwl_tx_cmd *tx_cmd;
302 __le16 fc;
303 u8 hdr_len;
304 u16 len, seq_number = 0;
305 u8 sta_id, tid = IWL_MAX_TID_COUNT;
306 bool is_agg = false;
307 int txq_id;
308
309 if (info->control.vif)
310 ctx = iwl_rxon_ctx_from_vif(info->control.vif);
311
312 if (iwl_is_rfkill(priv)) {
313 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
314 goto drop_unlock_priv;
315 }
316
317 fc = hdr->frame_control;
318
319 #ifdef CONFIG_IWLWIFI_DEBUG
320 if (ieee80211_is_auth(fc))
321 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
322 else if (ieee80211_is_assoc_req(fc))
323 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
324 else if (ieee80211_is_reassoc_req(fc))
325 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
326 #endif
327
328 if (unlikely(ieee80211_is_probe_resp(fc))) {
329 struct iwl_wipan_noa_data *noa_data =
330 rcu_dereference(priv->noa_data);
331
332 if (noa_data &&
333 pskb_expand_head(skb, 0, noa_data->length,
334 GFP_ATOMIC) == 0) {
335 memcpy(skb_put(skb, noa_data->length),
336 noa_data->data, noa_data->length);
337 hdr = (struct ieee80211_hdr *)skb->data;
338 }
339 }
340
341 hdr_len = ieee80211_hdrlen(fc);
342
343 /* For management frames use broadcast id to do not break aggregation */
344 if (!ieee80211_is_data(fc))
345 sta_id = ctx->bcast_sta_id;
346 else {
347 /* Find index into station table for destination station */
348 sta_id = iwl_sta_id_or_broadcast(ctx, info->control.sta);
349 if (sta_id == IWL_INVALID_STATION) {
350 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
351 hdr->addr1);
352 goto drop_unlock_priv;
353 }
354 }
355
356 IWL_DEBUG_TX(priv, "station Id %d\n", sta_id);
357
358 if (info->control.sta)
359 sta_priv = (void *)info->control.sta->drv_priv;
360
361 if (sta_priv && sta_priv->asleep &&
362 (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER)) {
363 /*
364 * This sends an asynchronous command to the device,
365 * but we can rely on it being processed before the
366 * next frame is processed -- and the next frame to
367 * this station is the one that will consume this
368 * counter.
369 * For now set the counter to just 1 since we do not
370 * support uAPSD yet.
371 *
372 * FIXME: If we get two non-bufferable frames one
373 * after the other, we might only send out one of
374 * them because this is racy.
375 */
376 iwl_sta_modify_sleep_tx_count(priv, sta_id, 1);
377 }
378
379 if (info->flags & IEEE80211_TX_CTL_AMPDU)
380 is_agg = true;
381
382 dev_cmd = kmem_cache_alloc(iwl_tx_cmd_pool, GFP_ATOMIC);
383
384 if (unlikely(!dev_cmd))
385 goto drop_unlock_priv;
386
387 memset(dev_cmd, 0, sizeof(*dev_cmd));
388 tx_cmd = (struct iwl_tx_cmd *) dev_cmd->payload;
389
390 /* Total # bytes to be transmitted */
391 len = (u16)skb->len;
392 tx_cmd->len = cpu_to_le16(len);
393
394 if (info->control.hw_key)
395 iwlagn_tx_cmd_build_hwcrypto(priv, info, tx_cmd, skb);
396
397 /* TODO need this for burst mode later on */
398 iwlagn_tx_cmd_build_basic(priv, skb, tx_cmd, info, hdr, sta_id);
399 iwl_dbg_log_tx_data_frame(priv, len, hdr);
400
401 iwlagn_tx_cmd_build_rate(priv, tx_cmd, info, fc);
402
403 iwl_update_stats(priv, true, fc, len);
404
405 memset(&info->status, 0, sizeof(info->status));
406
407 info->driver_data[0] = ctx;
408 info->driver_data[1] = dev_cmd;
409
410 spin_lock(&priv->sta_lock);
411
412 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
413 u8 *qc = NULL;
414 struct iwl_tid_data *tid_data;
415 qc = ieee80211_get_qos_ctl(hdr);
416 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
417 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
418 goto drop_unlock_sta;
419 tid_data = &priv->tid_data[sta_id][tid];
420
421 /* aggregation is on for this <sta,tid> */
422 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
423 tid_data->agg.state != IWL_AGG_ON) {
424 IWL_ERR(priv, "TX_CTL_AMPDU while not in AGG:"
425 " Tx flags = 0x%08x, agg.state = %d",
426 info->flags, tid_data->agg.state);
427 IWL_ERR(priv, "sta_id = %d, tid = %d seq_num = %d",
428 sta_id, tid, SEQ_TO_SN(tid_data->seq_number));
429 goto drop_unlock_sta;
430 }
431
432 /* We can receive packets from the stack in IWL_AGG_{ON,OFF}
433 * only. Check this here.
434 */
435 if (WARN_ONCE(tid_data->agg.state != IWL_AGG_ON &&
436 tid_data->agg.state != IWL_AGG_OFF,
437 "Tx while agg.state = %d", tid_data->agg.state))
438 goto drop_unlock_sta;
439
440 seq_number = tid_data->seq_number;
441 seq_number &= IEEE80211_SCTL_SEQ;
442 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
443 hdr->seq_ctrl |= cpu_to_le16(seq_number);
444 seq_number += 0x10;
445 }
446
447 /* Copy MAC header from skb into command buffer */
448 memcpy(tx_cmd->hdr, hdr, hdr_len);
449
450 if (is_agg)
451 txq_id = priv->tid_data[sta_id][tid].agg.txq_id;
452 else if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) {
453 /*
454 * Send this frame after DTIM -- there's a special queue
455 * reserved for this for contexts that support AP mode.
456 */
457 txq_id = ctx->mcast_queue;
458
459 /*
460 * The microcode will clear the more data
461 * bit in the last frame it transmits.
462 */
463 hdr->frame_control |=
464 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
465 } else if (info->flags & IEEE80211_TX_CTL_TX_OFFCHAN)
466 txq_id = IWL_AUX_QUEUE;
467 else
468 txq_id = ctx->ac_to_queue[skb_get_queue_mapping(skb)];
469
470 if (iwl_trans_tx(priv->trans, skb, dev_cmd, txq_id))
471 goto drop_unlock_sta;
472
473 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc) &&
474 !ieee80211_has_morefrags(fc))
475 priv->tid_data[sta_id][tid].seq_number = seq_number;
476
477 spin_unlock(&priv->sta_lock);
478
479 /*
480 * Avoid atomic ops if it isn't an associated client.
481 * Also, if this is a packet for aggregation, don't
482 * increase the counter because the ucode will stop
483 * aggregation queues when their respective station
484 * goes to sleep.
485 */
486 if (sta_priv && sta_priv->client && !is_agg)
487 atomic_inc(&sta_priv->pending_frames);
488
489 return 0;
490
491 drop_unlock_sta:
492 if (dev_cmd)
493 kmem_cache_free(iwl_tx_cmd_pool, dev_cmd);
494 spin_unlock(&priv->sta_lock);
495 drop_unlock_priv:
496 return -1;
497 }
498
499 static int iwlagn_alloc_agg_txq(struct iwl_priv *priv, int ac)
500 {
501 int q;
502
503 for (q = IWLAGN_FIRST_AMPDU_QUEUE;
504 q < priv->cfg->base_params->num_of_queues; q++) {
505 if (!test_and_set_bit(q, priv->agg_q_alloc)) {
506 priv->queue_to_ac[q] = ac;
507 return q;
508 }
509 }
510
511 return -ENOSPC;
512 }
513
514 static void iwlagn_dealloc_agg_txq(struct iwl_priv *priv, int q)
515 {
516 clear_bit(q, priv->agg_q_alloc);
517 priv->queue_to_ac[q] = IWL_INVALID_AC;
518 }
519
520 int iwlagn_tx_agg_stop(struct iwl_priv *priv, struct ieee80211_vif *vif,
521 struct ieee80211_sta *sta, u16 tid)
522 {
523 struct iwl_tid_data *tid_data;
524 int sta_id, txq_id;
525 enum iwl_agg_state agg_state;
526
527 sta_id = iwl_sta_id(sta);
528
529 if (sta_id == IWL_INVALID_STATION) {
530 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
531 return -ENXIO;
532 }
533
534 spin_lock_bh(&priv->sta_lock);
535
536 tid_data = &priv->tid_data[sta_id][tid];
537 txq_id = priv->tid_data[sta_id][tid].agg.txq_id;
538
539 switch (priv->tid_data[sta_id][tid].agg.state) {
540 case IWL_EMPTYING_HW_QUEUE_ADDBA:
541 /*
542 * This can happen if the peer stops aggregation
543 * again before we've had a chance to drain the
544 * queue we selected previously, i.e. before the
545 * session was really started completely.
546 */
547 IWL_DEBUG_HT(priv, "AGG stop before setup done\n");
548 goto turn_off;
549 case IWL_AGG_STARTING:
550 /*
551 * This can happen when the session is stopped before
552 * we receive ADDBA response
553 */
554 IWL_DEBUG_HT(priv, "AGG stop before AGG became operational\n");
555 goto turn_off;
556 case IWL_AGG_ON:
557 break;
558 default:
559 IWL_WARN(priv, "Stopping AGG while state not ON "
560 "or starting for %d on %d (%d)\n", sta_id, tid,
561 priv->tid_data[sta_id][tid].agg.state);
562 spin_unlock_bh(&priv->sta_lock);
563 return 0;
564 }
565
566 tid_data->agg.ssn = SEQ_TO_SN(tid_data->seq_number);
567
568 /* There are still packets for this RA / TID in the HW */
569 if (!test_bit(txq_id, priv->agg_q_alloc)) {
570 IWL_DEBUG_TX_QUEUES(priv,
571 "stopping AGG on STA/TID %d/%d but hwq %d not used\n",
572 sta_id, tid, txq_id);
573 } else if (tid_data->agg.ssn != tid_data->next_reclaimed) {
574 IWL_DEBUG_TX_QUEUES(priv, "Can't proceed: ssn %d, "
575 "next_recl = %d\n",
576 tid_data->agg.ssn,
577 tid_data->next_reclaimed);
578 priv->tid_data[sta_id][tid].agg.state =
579 IWL_EMPTYING_HW_QUEUE_DELBA;
580 spin_unlock_bh(&priv->sta_lock);
581 return 0;
582 }
583
584 IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d\n",
585 tid_data->agg.ssn);
586 turn_off:
587 agg_state = priv->tid_data[sta_id][tid].agg.state;
588 priv->tid_data[sta_id][tid].agg.state = IWL_AGG_OFF;
589
590 spin_unlock_bh(&priv->sta_lock);
591
592 if (test_bit(txq_id, priv->agg_q_alloc)) {
593 /* If the transport didn't know that we wanted to start
594 * agreggation, don't tell it that we want to stop them
595 */
596 if (agg_state != IWL_AGG_STARTING)
597 iwl_trans_tx_agg_disable(priv->trans, txq_id);
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_tid_data *tid_data;
610 int sta_id, txq_id, ret;
611
612 IWL_DEBUG_HT(priv, "TX AGG request on ra = %pM tid = %d\n",
613 sta->addr, tid);
614
615 sta_id = iwl_sta_id(sta);
616 if (sta_id == IWL_INVALID_STATION) {
617 IWL_ERR(priv, "Start AGG on invalid station\n");
618 return -ENXIO;
619 }
620 if (unlikely(tid >= IWL_MAX_TID_COUNT))
621 return -EINVAL;
622
623 if (priv->tid_data[sta_id][tid].agg.state != IWL_AGG_OFF) {
624 IWL_ERR(priv, "Start AGG when state is not IWL_AGG_OFF !\n");
625 return -ENXIO;
626 }
627
628 txq_id = iwlagn_alloc_agg_txq(priv, tid_to_ac[tid]);
629 if (txq_id < 0) {
630 IWL_DEBUG_TX_QUEUES(priv,
631 "No free aggregation queue for %pM/%d\n",
632 sta->addr, tid);
633 return txq_id;
634 }
635
636 ret = iwl_sta_tx_modify_enable_tid(priv, sta_id, tid);
637 if (ret)
638 return ret;
639
640 spin_lock_bh(&priv->sta_lock);
641 tid_data = &priv->tid_data[sta_id][tid];
642 tid_data->agg.ssn = SEQ_TO_SN(tid_data->seq_number);
643 tid_data->agg.txq_id = txq_id;
644
645 *ssn = tid_data->agg.ssn;
646
647 if (*ssn == tid_data->next_reclaimed) {
648 IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d\n",
649 tid_data->agg.ssn);
650 tid_data->agg.state = IWL_AGG_STARTING;
651 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
652 } else {
653 IWL_DEBUG_TX_QUEUES(priv, "Can't proceed: ssn %d, "
654 "next_reclaimed = %d\n",
655 tid_data->agg.ssn,
656 tid_data->next_reclaimed);
657 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA;
658 }
659 spin_unlock_bh(&priv->sta_lock);
660
661 return ret;
662 }
663
664 int iwlagn_tx_agg_oper(struct iwl_priv *priv, struct ieee80211_vif *vif,
665 struct ieee80211_sta *sta, u16 tid, u8 buf_size)
666 {
667 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
668 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
669 int q, fifo;
670 u16 ssn;
671
672 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
673
674 spin_lock_bh(&priv->sta_lock);
675 ssn = priv->tid_data[sta_priv->sta_id][tid].agg.ssn;
676 q = priv->tid_data[sta_priv->sta_id][tid].agg.txq_id;
677 priv->tid_data[sta_priv->sta_id][tid].agg.state = IWL_AGG_ON;
678 spin_unlock_bh(&priv->sta_lock);
679
680 fifo = ctx->ac_to_fifo[tid_to_ac[tid]];
681
682 iwl_trans_tx_agg_setup(priv->trans, q, fifo,
683 sta_priv->sta_id, tid,
684 buf_size, ssn);
685
686 /*
687 * If the limit is 0, then it wasn't initialised yet,
688 * use the default. We can do that since we take the
689 * minimum below, and we don't want to go above our
690 * default due to hardware restrictions.
691 */
692 if (sta_priv->max_agg_bufsize == 0)
693 sta_priv->max_agg_bufsize =
694 LINK_QUAL_AGG_FRAME_LIMIT_DEF;
695
696 /*
697 * Even though in theory the peer could have different
698 * aggregation reorder buffer sizes for different sessions,
699 * our ucode doesn't allow for that and has a global limit
700 * for each station. Therefore, use the minimum of all the
701 * aggregation sessions and our default value.
702 */
703 sta_priv->max_agg_bufsize =
704 min(sta_priv->max_agg_bufsize, buf_size);
705
706 if (priv->hw_params.use_rts_for_aggregation) {
707 /*
708 * switch to RTS/CTS if it is the prefer protection
709 * method for HT traffic
710 */
711
712 sta_priv->lq_sta.lq.general_params.flags |=
713 LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
714 }
715 priv->agg_tids_count++;
716 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
717 priv->agg_tids_count);
718
719 sta_priv->lq_sta.lq.agg_params.agg_frame_cnt_limit =
720 sta_priv->max_agg_bufsize;
721
722 IWL_DEBUG_HT(priv, "Tx aggregation enabled on ra = %pM tid = %d\n",
723 sta->addr, tid);
724
725 return iwl_send_lq_cmd(priv, ctx,
726 &sta_priv->lq_sta.lq, CMD_ASYNC, false);
727 }
728
729 static void iwlagn_check_ratid_empty(struct iwl_priv *priv, int sta_id, u8 tid)
730 {
731 struct iwl_tid_data *tid_data = &priv->tid_data[sta_id][tid];
732 enum iwl_rxon_context_id ctx;
733 struct ieee80211_vif *vif;
734 u8 *addr;
735
736 lockdep_assert_held(&priv->sta_lock);
737
738 addr = priv->stations[sta_id].sta.sta.addr;
739 ctx = priv->stations[sta_id].ctxid;
740 vif = priv->contexts[ctx].vif;
741
742 switch (priv->tid_data[sta_id][tid].agg.state) {
743 case IWL_EMPTYING_HW_QUEUE_DELBA:
744 /* There are no packets for this RA / TID in the HW any more */
745 if (tid_data->agg.ssn == tid_data->next_reclaimed) {
746 IWL_DEBUG_TX_QUEUES(priv,
747 "Can continue DELBA flow ssn = next_recl ="
748 " %d", tid_data->next_reclaimed);
749 iwl_trans_tx_agg_disable(priv->trans,
750 tid_data->agg.txq_id);
751 iwlagn_dealloc_agg_txq(priv, tid_data->agg.txq_id);
752 tid_data->agg.state = IWL_AGG_OFF;
753 ieee80211_stop_tx_ba_cb_irqsafe(vif, addr, tid);
754 }
755 break;
756 case IWL_EMPTYING_HW_QUEUE_ADDBA:
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 ADDBA flow ssn = next_recl ="
761 " %d", tid_data->next_reclaimed);
762 tid_data->agg.state = IWL_AGG_STARTING;
763 ieee80211_start_tx_ba_cb_irqsafe(vif, addr, tid);
764 }
765 break;
766 default:
767 break;
768 }
769 }
770
771 static void iwlagn_non_agg_tx_status(struct iwl_priv *priv,
772 struct iwl_rxon_context *ctx,
773 const u8 *addr1)
774 {
775 struct ieee80211_sta *sta;
776 struct iwl_station_priv *sta_priv;
777
778 rcu_read_lock();
779 sta = ieee80211_find_sta(ctx->vif, addr1);
780 if (sta) {
781 sta_priv = (void *)sta->drv_priv;
782 /* avoid atomic ops if this isn't a client */
783 if (sta_priv->client &&
784 atomic_dec_return(&sta_priv->pending_frames) == 0)
785 ieee80211_sta_block_awake(priv->hw, sta, false);
786 }
787 rcu_read_unlock();
788 }
789
790 /**
791 * translate ucode response to mac80211 tx status control values
792 */
793 static void iwlagn_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
794 struct ieee80211_tx_info *info)
795 {
796 struct ieee80211_tx_rate *r = &info->status.rates[0];
797
798 info->status.antenna =
799 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
800 if (rate_n_flags & RATE_MCS_HT_MSK)
801 r->flags |= IEEE80211_TX_RC_MCS;
802 if (rate_n_flags & RATE_MCS_GF_MSK)
803 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
804 if (rate_n_flags & RATE_MCS_HT40_MSK)
805 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
806 if (rate_n_flags & RATE_MCS_DUP_MSK)
807 r->flags |= IEEE80211_TX_RC_DUP_DATA;
808 if (rate_n_flags & RATE_MCS_SGI_MSK)
809 r->flags |= IEEE80211_TX_RC_SHORT_GI;
810 r->idx = iwlagn_hwrate_to_mac80211_idx(rate_n_flags, info->band);
811 }
812
813 #ifdef CONFIG_IWLWIFI_DEBUG
814 const char *iwl_get_tx_fail_reason(u32 status)
815 {
816 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
817 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
818
819 switch (status & TX_STATUS_MSK) {
820 case TX_STATUS_SUCCESS:
821 return "SUCCESS";
822 TX_STATUS_POSTPONE(DELAY);
823 TX_STATUS_POSTPONE(FEW_BYTES);
824 TX_STATUS_POSTPONE(BT_PRIO);
825 TX_STATUS_POSTPONE(QUIET_PERIOD);
826 TX_STATUS_POSTPONE(CALC_TTAK);
827 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
828 TX_STATUS_FAIL(SHORT_LIMIT);
829 TX_STATUS_FAIL(LONG_LIMIT);
830 TX_STATUS_FAIL(FIFO_UNDERRUN);
831 TX_STATUS_FAIL(DRAIN_FLOW);
832 TX_STATUS_FAIL(RFKILL_FLUSH);
833 TX_STATUS_FAIL(LIFE_EXPIRE);
834 TX_STATUS_FAIL(DEST_PS);
835 TX_STATUS_FAIL(HOST_ABORTED);
836 TX_STATUS_FAIL(BT_RETRY);
837 TX_STATUS_FAIL(STA_INVALID);
838 TX_STATUS_FAIL(FRAG_DROPPED);
839 TX_STATUS_FAIL(TID_DISABLE);
840 TX_STATUS_FAIL(FIFO_FLUSHED);
841 TX_STATUS_FAIL(INSUFFICIENT_CF_POLL);
842 TX_STATUS_FAIL(PASSIVE_NO_RX);
843 TX_STATUS_FAIL(NO_BEACON_ON_RADAR);
844 }
845
846 return "UNKNOWN";
847
848 #undef TX_STATUS_FAIL
849 #undef TX_STATUS_POSTPONE
850 }
851 #endif /* CONFIG_IWLWIFI_DEBUG */
852
853 static void iwlagn_count_agg_tx_err_status(struct iwl_priv *priv, u16 status)
854 {
855 status &= AGG_TX_STATUS_MSK;
856
857 switch (status) {
858 case AGG_TX_STATE_UNDERRUN_MSK:
859 priv->reply_agg_tx_stats.underrun++;
860 break;
861 case AGG_TX_STATE_BT_PRIO_MSK:
862 priv->reply_agg_tx_stats.bt_prio++;
863 break;
864 case AGG_TX_STATE_FEW_BYTES_MSK:
865 priv->reply_agg_tx_stats.few_bytes++;
866 break;
867 case AGG_TX_STATE_ABORT_MSK:
868 priv->reply_agg_tx_stats.abort++;
869 break;
870 case AGG_TX_STATE_LAST_SENT_TTL_MSK:
871 priv->reply_agg_tx_stats.last_sent_ttl++;
872 break;
873 case AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK:
874 priv->reply_agg_tx_stats.last_sent_try++;
875 break;
876 case AGG_TX_STATE_LAST_SENT_BT_KILL_MSK:
877 priv->reply_agg_tx_stats.last_sent_bt_kill++;
878 break;
879 case AGG_TX_STATE_SCD_QUERY_MSK:
880 priv->reply_agg_tx_stats.scd_query++;
881 break;
882 case AGG_TX_STATE_TEST_BAD_CRC32_MSK:
883 priv->reply_agg_tx_stats.bad_crc32++;
884 break;
885 case AGG_TX_STATE_RESPONSE_MSK:
886 priv->reply_agg_tx_stats.response++;
887 break;
888 case AGG_TX_STATE_DUMP_TX_MSK:
889 priv->reply_agg_tx_stats.dump_tx++;
890 break;
891 case AGG_TX_STATE_DELAY_TX_MSK:
892 priv->reply_agg_tx_stats.delay_tx++;
893 break;
894 default:
895 priv->reply_agg_tx_stats.unknown++;
896 break;
897 }
898 }
899
900 static void iwl_rx_reply_tx_agg(struct iwl_priv *priv,
901 struct iwlagn_tx_resp *tx_resp)
902 {
903 struct agg_tx_status *frame_status = &tx_resp->status;
904 int tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
905 IWLAGN_TX_RES_TID_POS;
906 int sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
907 IWLAGN_TX_RES_RA_POS;
908 struct iwl_ht_agg *agg = &priv->tid_data[sta_id][tid].agg;
909 u32 status = le16_to_cpu(tx_resp->status.status);
910 int i;
911
912 WARN_ON(tid == IWL_TID_NON_QOS);
913
914 if (agg->wait_for_ba)
915 IWL_DEBUG_TX_REPLY(priv,
916 "got tx response w/o block-ack\n");
917
918 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
919 agg->wait_for_ba = (tx_resp->frame_count > 1);
920
921 /*
922 * If the BT kill count is non-zero, we'll get this
923 * notification again.
924 */
925 if (tx_resp->bt_kill_count && tx_resp->frame_count == 1 &&
926 priv->cfg->bt_params &&
927 priv->cfg->bt_params->advanced_bt_coexist) {
928 IWL_DEBUG_COEX(priv, "receive reply tx w/ bt_kill\n");
929 }
930
931 if (tx_resp->frame_count == 1)
932 return;
933
934 /* Construct bit-map of pending frames within Tx window */
935 for (i = 0; i < tx_resp->frame_count; i++) {
936 u16 fstatus = le16_to_cpu(frame_status[i].status);
937
938 if (status & AGG_TX_STATUS_MSK)
939 iwlagn_count_agg_tx_err_status(priv, fstatus);
940
941 if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
942 AGG_TX_STATE_ABORT_MSK))
943 continue;
944
945 IWL_DEBUG_TX_REPLY(priv, "status %s (0x%08x), "
946 "try-count (0x%08x)\n",
947 iwl_get_agg_tx_fail_reason(fstatus),
948 fstatus & AGG_TX_STATUS_MSK,
949 fstatus & AGG_TX_TRY_MSK);
950 }
951 }
952
953 #ifdef CONFIG_IWLWIFI_DEBUG
954 #define AGG_TX_STATE_FAIL(x) case AGG_TX_STATE_ ## x: return #x
955
956 const char *iwl_get_agg_tx_fail_reason(u16 status)
957 {
958 status &= AGG_TX_STATUS_MSK;
959 switch (status) {
960 case AGG_TX_STATE_TRANSMITTED:
961 return "SUCCESS";
962 AGG_TX_STATE_FAIL(UNDERRUN_MSK);
963 AGG_TX_STATE_FAIL(BT_PRIO_MSK);
964 AGG_TX_STATE_FAIL(FEW_BYTES_MSK);
965 AGG_TX_STATE_FAIL(ABORT_MSK);
966 AGG_TX_STATE_FAIL(LAST_SENT_TTL_MSK);
967 AGG_TX_STATE_FAIL(LAST_SENT_TRY_CNT_MSK);
968 AGG_TX_STATE_FAIL(LAST_SENT_BT_KILL_MSK);
969 AGG_TX_STATE_FAIL(SCD_QUERY_MSK);
970 AGG_TX_STATE_FAIL(TEST_BAD_CRC32_MSK);
971 AGG_TX_STATE_FAIL(RESPONSE_MSK);
972 AGG_TX_STATE_FAIL(DUMP_TX_MSK);
973 AGG_TX_STATE_FAIL(DELAY_TX_MSK);
974 }
975
976 return "UNKNOWN";
977 }
978 #endif /* CONFIG_IWLWIFI_DEBUG */
979
980 static inline u32 iwlagn_get_scd_ssn(struct iwlagn_tx_resp *tx_resp)
981 {
982 return le32_to_cpup((__le32 *)&tx_resp->status +
983 tx_resp->frame_count) & MAX_SN;
984 }
985
986 static void iwlagn_count_tx_err_status(struct iwl_priv *priv, u16 status)
987 {
988 status &= TX_STATUS_MSK;
989
990 switch (status) {
991 case TX_STATUS_POSTPONE_DELAY:
992 priv->reply_tx_stats.pp_delay++;
993 break;
994 case TX_STATUS_POSTPONE_FEW_BYTES:
995 priv->reply_tx_stats.pp_few_bytes++;
996 break;
997 case TX_STATUS_POSTPONE_BT_PRIO:
998 priv->reply_tx_stats.pp_bt_prio++;
999 break;
1000 case TX_STATUS_POSTPONE_QUIET_PERIOD:
1001 priv->reply_tx_stats.pp_quiet_period++;
1002 break;
1003 case TX_STATUS_POSTPONE_CALC_TTAK:
1004 priv->reply_tx_stats.pp_calc_ttak++;
1005 break;
1006 case TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY:
1007 priv->reply_tx_stats.int_crossed_retry++;
1008 break;
1009 case TX_STATUS_FAIL_SHORT_LIMIT:
1010 priv->reply_tx_stats.short_limit++;
1011 break;
1012 case TX_STATUS_FAIL_LONG_LIMIT:
1013 priv->reply_tx_stats.long_limit++;
1014 break;
1015 case TX_STATUS_FAIL_FIFO_UNDERRUN:
1016 priv->reply_tx_stats.fifo_underrun++;
1017 break;
1018 case TX_STATUS_FAIL_DRAIN_FLOW:
1019 priv->reply_tx_stats.drain_flow++;
1020 break;
1021 case TX_STATUS_FAIL_RFKILL_FLUSH:
1022 priv->reply_tx_stats.rfkill_flush++;
1023 break;
1024 case TX_STATUS_FAIL_LIFE_EXPIRE:
1025 priv->reply_tx_stats.life_expire++;
1026 break;
1027 case TX_STATUS_FAIL_DEST_PS:
1028 priv->reply_tx_stats.dest_ps++;
1029 break;
1030 case TX_STATUS_FAIL_HOST_ABORTED:
1031 priv->reply_tx_stats.host_abort++;
1032 break;
1033 case TX_STATUS_FAIL_BT_RETRY:
1034 priv->reply_tx_stats.bt_retry++;
1035 break;
1036 case TX_STATUS_FAIL_STA_INVALID:
1037 priv->reply_tx_stats.sta_invalid++;
1038 break;
1039 case TX_STATUS_FAIL_FRAG_DROPPED:
1040 priv->reply_tx_stats.frag_drop++;
1041 break;
1042 case TX_STATUS_FAIL_TID_DISABLE:
1043 priv->reply_tx_stats.tid_disable++;
1044 break;
1045 case TX_STATUS_FAIL_FIFO_FLUSHED:
1046 priv->reply_tx_stats.fifo_flush++;
1047 break;
1048 case TX_STATUS_FAIL_INSUFFICIENT_CF_POLL:
1049 priv->reply_tx_stats.insuff_cf_poll++;
1050 break;
1051 case TX_STATUS_FAIL_PASSIVE_NO_RX:
1052 priv->reply_tx_stats.fail_hw_drop++;
1053 break;
1054 case TX_STATUS_FAIL_NO_BEACON_ON_RADAR:
1055 priv->reply_tx_stats.sta_color_mismatch++;
1056 break;
1057 default:
1058 priv->reply_tx_stats.unknown++;
1059 break;
1060 }
1061 }
1062
1063 static void iwlagn_set_tx_status(struct iwl_priv *priv,
1064 struct ieee80211_tx_info *info,
1065 struct iwlagn_tx_resp *tx_resp,
1066 bool is_agg)
1067 {
1068 u16 status = le16_to_cpu(tx_resp->status.status);
1069
1070 info->status.rates[0].count = tx_resp->failure_frame + 1;
1071 if (is_agg)
1072 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1073 info->flags |= iwl_tx_status_to_mac80211(status);
1074 iwlagn_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
1075 info);
1076 if (!iwl_is_tx_success(status))
1077 iwlagn_count_tx_err_status(priv, status);
1078 }
1079
1080 static void iwl_check_abort_status(struct iwl_priv *priv,
1081 u8 frame_count, u32 status)
1082 {
1083 if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) {
1084 IWL_ERR(priv, "Tx flush command to flush out all frames\n");
1085 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
1086 queue_work(priv->workqueue, &priv->tx_flush);
1087 }
1088 }
1089
1090 static int iwl_reclaim(struct iwl_priv *priv, int sta_id, int tid,
1091 int txq_id, int ssn, struct sk_buff_head *skbs)
1092 {
1093 if (unlikely(txq_id >= IWLAGN_FIRST_AMPDU_QUEUE &&
1094 tid != IWL_TID_NON_QOS &&
1095 txq_id != priv->tid_data[sta_id][tid].agg.txq_id)) {
1096 /*
1097 * FIXME: this is a uCode bug which need to be addressed,
1098 * log the information and return for now.
1099 * Since it is can possibly happen very often and in order
1100 * not to fill the syslog, don't use IWL_ERR or IWL_WARN
1101 */
1102 IWL_DEBUG_TX_QUEUES(priv,
1103 "Bad queue mapping txq_id=%d, agg_txq[sta:%d,tid:%d]=%d\n",
1104 txq_id, sta_id, tid,
1105 priv->tid_data[sta_id][tid].agg.txq_id);
1106 return 1;
1107 }
1108
1109 iwl_trans_reclaim(priv->trans, txq_id, ssn, skbs);
1110 return 0;
1111 }
1112
1113 int iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb,
1114 struct iwl_device_cmd *cmd)
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(&priv->sta_lock);
1139
1140 if (is_agg)
1141 iwl_rx_reply_tx_agg(priv, tx_resp);
1142
1143 __skb_queue_head_init(&skbs);
1144
1145 if (tx_resp->frame_count == 1) {
1146 u16 next_reclaimed = le16_to_cpu(tx_resp->seq_ctl);
1147 next_reclaimed = SEQ_TO_SN(next_reclaimed + 0x10);
1148
1149 if (is_agg) {
1150 /* If this is an aggregation queue, we can rely on the
1151 * ssn since the wifi sequence number corresponds to
1152 * the index in the TFD ring (%256).
1153 * The seq_ctl is the sequence control of the packet
1154 * to which this Tx response relates. But if there is a
1155 * hole in the bitmap of the BA we received, this Tx
1156 * response may allow to reclaim the hole and all the
1157 * subsequent packets that were already acked.
1158 * In that case, seq_ctl != ssn, and the next packet
1159 * to be reclaimed will be ssn and not seq_ctl.
1160 */
1161 next_reclaimed = ssn;
1162 }
1163
1164 if (tid != IWL_TID_NON_QOS) {
1165 priv->tid_data[sta_id][tid].next_reclaimed =
1166 next_reclaimed;
1167 IWL_DEBUG_TX_REPLY(priv, "Next reclaimed packet:%d\n",
1168 next_reclaimed);
1169 }
1170
1171 /*we can free until ssn % q.n_bd not inclusive */
1172 WARN_ON(iwl_reclaim(priv, sta_id, tid, txq_id, ssn, &skbs));
1173 iwlagn_check_ratid_empty(priv, sta_id, tid);
1174 freed = 0;
1175
1176 /* process frames */
1177 skb_queue_walk(&skbs, skb) {
1178 hdr = (struct ieee80211_hdr *)skb->data;
1179
1180 if (!ieee80211_is_data_qos(hdr->frame_control))
1181 priv->last_seq_ctl = tx_resp->seq_ctl;
1182
1183 info = IEEE80211_SKB_CB(skb);
1184 ctx = info->driver_data[0];
1185 kmem_cache_free(iwl_tx_cmd_pool,
1186 (info->driver_data[1]));
1187
1188 memset(&info->status, 0, sizeof(info->status));
1189
1190 if (status == TX_STATUS_FAIL_PASSIVE_NO_RX &&
1191 iwl_is_associated_ctx(ctx) && ctx->vif &&
1192 ctx->vif->type == NL80211_IFTYPE_STATION) {
1193 /* block and stop all queues */
1194 priv->passive_no_rx = true;
1195 IWL_DEBUG_TX_QUEUES(priv, "stop all queues: "
1196 "passive channel");
1197 ieee80211_stop_queues(priv->hw);
1198
1199 IWL_DEBUG_TX_REPLY(priv,
1200 "TXQ %d status %s (0x%08x) "
1201 "rate_n_flags 0x%x retries %d\n",
1202 txq_id,
1203 iwl_get_tx_fail_reason(status),
1204 status,
1205 le32_to_cpu(tx_resp->rate_n_flags),
1206 tx_resp->failure_frame);
1207
1208 IWL_DEBUG_TX_REPLY(priv,
1209 "FrameCnt = %d, idx=%d\n",
1210 tx_resp->frame_count, cmd_index);
1211 }
1212
1213 /* check if BAR is needed */
1214 if (is_agg && !iwl_is_tx_success(status))
1215 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1216 iwlagn_set_tx_status(priv, IEEE80211_SKB_CB(skb),
1217 tx_resp, is_agg);
1218 if (!is_agg)
1219 iwlagn_non_agg_tx_status(priv, ctx, hdr->addr1);
1220
1221 freed++;
1222 }
1223
1224 WARN_ON(!is_agg && freed != 1);
1225 }
1226
1227 iwl_check_abort_status(priv, tx_resp->frame_count, status);
1228 spin_unlock(&priv->sta_lock);
1229
1230 while (!skb_queue_empty(&skbs)) {
1231 skb = __skb_dequeue(&skbs);
1232 ieee80211_tx_status(priv->hw, skb);
1233 }
1234
1235 return 0;
1236 }
1237
1238 /**
1239 * iwlagn_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
1240 *
1241 * Handles block-acknowledge notification from device, which reports success
1242 * of frames sent via aggregation.
1243 */
1244 int iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv,
1245 struct iwl_rx_cmd_buffer *rxb,
1246 struct iwl_device_cmd *cmd)
1247 {
1248 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1249 struct iwl_compressed_ba_resp *ba_resp = (void *)pkt->data;
1250 struct iwl_ht_agg *agg;
1251 struct sk_buff_head reclaimed_skbs;
1252 struct ieee80211_tx_info *info;
1253 struct ieee80211_hdr *hdr;
1254 struct sk_buff *skb;
1255 int sta_id;
1256 int tid;
1257 int freed;
1258
1259 /* "flow" corresponds to Tx queue */
1260 u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
1261
1262 /* "ssn" is start of block-ack Tx window, corresponds to index
1263 * (in Tx queue's circular buffer) of first TFD/frame in window */
1264 u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
1265
1266 if (scd_flow >= priv->cfg->base_params->num_of_queues) {
1267 IWL_ERR(priv,
1268 "BUG_ON scd_flow is bigger than number of queues\n");
1269 return 0;
1270 }
1271
1272 sta_id = ba_resp->sta_id;
1273 tid = ba_resp->tid;
1274 agg = &priv->tid_data[sta_id][tid].agg;
1275
1276 spin_lock(&priv->sta_lock);
1277
1278 if (unlikely(!agg->wait_for_ba)) {
1279 if (unlikely(ba_resp->bitmap))
1280 IWL_ERR(priv, "Received BA when not expected\n");
1281 spin_unlock(&priv->sta_lock);
1282 return 0;
1283 }
1284
1285 __skb_queue_head_init(&reclaimed_skbs);
1286
1287 /* Release all TFDs before the SSN, i.e. all TFDs in front of
1288 * block-ack window (we assume that they've been successfully
1289 * transmitted ... if not, it's too late anyway). */
1290 if (iwl_reclaim(priv, sta_id, tid, scd_flow,
1291 ba_resp_scd_ssn, &reclaimed_skbs)) {
1292 spin_unlock(&priv->sta_lock);
1293 return 0;
1294 }
1295
1296 IWL_DEBUG_TX_REPLY(priv, "REPLY_COMPRESSED_BA [%d] Received from %pM, "
1297 "sta_id = %d\n",
1298 agg->wait_for_ba,
1299 (u8 *) &ba_resp->sta_addr_lo32,
1300 ba_resp->sta_id);
1301 IWL_DEBUG_TX_REPLY(priv, "TID = %d, SeqCtl = %d, bitmap = 0x%llx, "
1302 "scd_flow = %d, scd_ssn = %d\n",
1303 ba_resp->tid, le16_to_cpu(ba_resp->seq_ctl),
1304 (unsigned long long)le64_to_cpu(ba_resp->bitmap),
1305 scd_flow, ba_resp_scd_ssn);
1306
1307 /* Mark that the expected block-ack response arrived */
1308 agg->wait_for_ba = false;
1309
1310 /* Sanity check values reported by uCode */
1311 if (ba_resp->txed_2_done > ba_resp->txed) {
1312 IWL_DEBUG_TX_REPLY(priv,
1313 "bogus sent(%d) and ack(%d) count\n",
1314 ba_resp->txed, ba_resp->txed_2_done);
1315 /*
1316 * set txed_2_done = txed,
1317 * so it won't impact rate scale
1318 */
1319 ba_resp->txed = ba_resp->txed_2_done;
1320 }
1321 IWL_DEBUG_HT(priv, "agg frames sent:%d, acked:%d\n",
1322 ba_resp->txed, ba_resp->txed_2_done);
1323
1324 priv->tid_data[sta_id][tid].next_reclaimed = ba_resp_scd_ssn;
1325
1326 iwlagn_check_ratid_empty(priv, sta_id, tid);
1327 freed = 0;
1328
1329 skb_queue_walk(&reclaimed_skbs, skb) {
1330 hdr = (struct ieee80211_hdr *)skb->data;
1331
1332 if (ieee80211_is_data_qos(hdr->frame_control))
1333 freed++;
1334 else
1335 WARN_ON_ONCE(1);
1336
1337 info = IEEE80211_SKB_CB(skb);
1338 kmem_cache_free(iwl_tx_cmd_pool, (info->driver_data[1]));
1339
1340 if (freed == 1) {
1341 /* this is the first skb we deliver in this batch */
1342 /* put the rate scaling data there */
1343 info = IEEE80211_SKB_CB(skb);
1344 memset(&info->status, 0, sizeof(info->status));
1345 info->flags |= IEEE80211_TX_STAT_ACK;
1346 info->flags |= IEEE80211_TX_STAT_AMPDU;
1347 info->status.ampdu_ack_len = ba_resp->txed_2_done;
1348 info->status.ampdu_len = ba_resp->txed;
1349 iwlagn_hwrate_to_tx_control(priv, agg->rate_n_flags,
1350 info);
1351 }
1352 }
1353
1354 spin_unlock(&priv->sta_lock);
1355
1356 while (!skb_queue_empty(&reclaimed_skbs)) {
1357 skb = __skb_dequeue(&reclaimed_skbs);
1358 ieee80211_tx_status(priv->hw, skb);
1359 }
1360
1361 return 0;
1362 }
Linux kernel - Deliverables
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