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Merge branch 'for-linville' of git://github.com/kvalo/ath6kl
[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 cfg(priv)->bt_params &&
89 cfg(priv)->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 (cfg(priv)->bt_params &&
207 cfg(priv)->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(hw_params(priv).valid_tx_ant));
212 } else
213 priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
214 hw_params(priv).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(trans(priv), 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 < cfg(priv)->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
526 sta_id = iwl_sta_id(sta);
527
528 if (sta_id == IWL_INVALID_STATION) {
529 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
530 return -ENXIO;
531 }
532
533 spin_lock_bh(&priv->sta_lock);
534
535 tid_data = &priv->tid_data[sta_id][tid];
536 txq_id = priv->tid_data[sta_id][tid].agg.txq_id;
537
538 switch (priv->tid_data[sta_id][tid].agg.state) {
539 case IWL_EMPTYING_HW_QUEUE_ADDBA:
540 /*
541 * This can happen if the peer stops aggregation
542 * again before we've had a chance to drain the
543 * queue we selected previously, i.e. before the
544 * session was really started completely.
545 */
546 IWL_DEBUG_HT(priv, "AGG stop before setup done\n");
547 goto turn_off;
548 case IWL_AGG_ON:
549 break;
550 default:
551 IWL_WARN(priv, "Stopping AGG while state not ON "
552 "or starting for %d on %d (%d)\n", sta_id, tid,
553 priv->tid_data[sta_id][tid].agg.state);
554 spin_unlock_bh(&priv->sta_lock);
555 return 0;
556 }
557
558 tid_data->agg.ssn = SEQ_TO_SN(tid_data->seq_number);
559
560 /* There are still packets for this RA / TID in the HW */
561 if (!test_bit(txq_id, priv->agg_q_alloc)) {
562 IWL_DEBUG_TX_QUEUES(priv,
563 "stopping AGG on STA/TID %d/%d but hwq %d not used\n",
564 sta_id, tid, txq_id);
565 } else if (tid_data->agg.ssn != tid_data->next_reclaimed) {
566 IWL_DEBUG_TX_QUEUES(priv, "Can't proceed: ssn %d, "
567 "next_recl = %d\n",
568 tid_data->agg.ssn,
569 tid_data->next_reclaimed);
570 priv->tid_data[sta_id][tid].agg.state =
571 IWL_EMPTYING_HW_QUEUE_DELBA;
572 spin_unlock_bh(&priv->sta_lock);
573 return 0;
574 }
575
576 IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d\n",
577 tid_data->agg.ssn);
578 turn_off:
579 priv->tid_data[sta_id][tid].agg.state = IWL_AGG_OFF;
580
581 spin_unlock_bh(&priv->sta_lock);
582
583 if (test_bit(txq_id, priv->agg_q_alloc)) {
584 iwl_trans_tx_agg_disable(trans(priv), txq_id);
585 iwlagn_dealloc_agg_txq(priv, txq_id);
586 }
587
588 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
589
590 return 0;
591 }
592
593 int iwlagn_tx_agg_start(struct iwl_priv *priv, struct ieee80211_vif *vif,
594 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
595 {
596 struct iwl_tid_data *tid_data;
597 int sta_id, txq_id, ret;
598
599 IWL_DEBUG_HT(priv, "TX AGG request on ra = %pM tid = %d\n",
600 sta->addr, tid);
601
602 sta_id = iwl_sta_id(sta);
603 if (sta_id == IWL_INVALID_STATION) {
604 IWL_ERR(priv, "Start AGG on invalid station\n");
605 return -ENXIO;
606 }
607 if (unlikely(tid >= IWL_MAX_TID_COUNT))
608 return -EINVAL;
609
610 if (priv->tid_data[sta_id][tid].agg.state != IWL_AGG_OFF) {
611 IWL_ERR(priv, "Start AGG when state is not IWL_AGG_OFF !\n");
612 return -ENXIO;
613 }
614
615 txq_id = iwlagn_alloc_agg_txq(priv, tid_to_ac[tid]);
616 if (txq_id < 0) {
617 IWL_DEBUG_TX_QUEUES(priv,
618 "No free aggregation queue for %pM/%d\n",
619 sta->addr, tid);
620 return txq_id;
621 }
622
623 ret = iwl_sta_tx_modify_enable_tid(priv, sta_id, tid);
624 if (ret)
625 return ret;
626
627 spin_lock_bh(&priv->sta_lock);
628 tid_data = &priv->tid_data[sta_id][tid];
629 tid_data->agg.ssn = SEQ_TO_SN(tid_data->seq_number);
630 tid_data->agg.txq_id = txq_id;
631
632 *ssn = tid_data->agg.ssn;
633
634 if (*ssn == tid_data->next_reclaimed) {
635 IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d\n",
636 tid_data->agg.ssn);
637 tid_data->agg.state = IWL_AGG_ON;
638 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
639 } else {
640 IWL_DEBUG_TX_QUEUES(priv, "Can't proceed: ssn %d, "
641 "next_reclaimed = %d\n",
642 tid_data->agg.ssn,
643 tid_data->next_reclaimed);
644 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA;
645 }
646 spin_unlock_bh(&priv->sta_lock);
647
648 return ret;
649 }
650
651 int iwlagn_tx_agg_oper(struct iwl_priv *priv, struct ieee80211_vif *vif,
652 struct ieee80211_sta *sta, u16 tid, u8 buf_size)
653 {
654 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
655 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
656 int q, fifo;
657 u16 ssn;
658
659 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
660
661 spin_lock_bh(&priv->sta_lock);
662 ssn = priv->tid_data[sta_priv->sta_id][tid].agg.ssn;
663 q = priv->tid_data[sta_priv->sta_id][tid].agg.txq_id;
664 spin_unlock_bh(&priv->sta_lock);
665
666 fifo = ctx->ac_to_fifo[tid_to_ac[tid]];
667
668 iwl_trans_tx_agg_setup(trans(priv), q, fifo,
669 sta_priv->sta_id, tid,
670 buf_size, ssn);
671
672 /*
673 * If the limit is 0, then it wasn't initialised yet,
674 * use the default. We can do that since we take the
675 * minimum below, and we don't want to go above our
676 * default due to hardware restrictions.
677 */
678 if (sta_priv->max_agg_bufsize == 0)
679 sta_priv->max_agg_bufsize =
680 LINK_QUAL_AGG_FRAME_LIMIT_DEF;
681
682 /*
683 * Even though in theory the peer could have different
684 * aggregation reorder buffer sizes for different sessions,
685 * our ucode doesn't allow for that and has a global limit
686 * for each station. Therefore, use the minimum of all the
687 * aggregation sessions and our default value.
688 */
689 sta_priv->max_agg_bufsize =
690 min(sta_priv->max_agg_bufsize, buf_size);
691
692 if (hw_params(priv).use_rts_for_aggregation) {
693 /*
694 * switch to RTS/CTS if it is the prefer protection
695 * method for HT traffic
696 */
697
698 sta_priv->lq_sta.lq.general_params.flags |=
699 LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
700 }
701 priv->agg_tids_count++;
702 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
703 priv->agg_tids_count);
704
705 sta_priv->lq_sta.lq.agg_params.agg_frame_cnt_limit =
706 sta_priv->max_agg_bufsize;
707
708 IWL_DEBUG_HT(priv, "Tx aggregation enabled on ra = %pM tid = %d\n",
709 sta->addr, tid);
710
711 return iwl_send_lq_cmd(priv, ctx,
712 &sta_priv->lq_sta.lq, CMD_ASYNC, false);
713 }
714
715 static void iwlagn_check_ratid_empty(struct iwl_priv *priv, int sta_id, u8 tid)
716 {
717 struct iwl_tid_data *tid_data = &priv->tid_data[sta_id][tid];
718 enum iwl_rxon_context_id ctx;
719 struct ieee80211_vif *vif;
720 u8 *addr;
721
722 lockdep_assert_held(&priv->sta_lock);
723
724 addr = priv->stations[sta_id].sta.sta.addr;
725 ctx = priv->stations[sta_id].ctxid;
726 vif = priv->contexts[ctx].vif;
727
728 switch (priv->tid_data[sta_id][tid].agg.state) {
729 case IWL_EMPTYING_HW_QUEUE_DELBA:
730 /* There are no packets for this RA / TID in the HW any more */
731 if (tid_data->agg.ssn == tid_data->next_reclaimed) {
732 IWL_DEBUG_TX_QUEUES(priv,
733 "Can continue DELBA flow ssn = next_recl ="
734 " %d", tid_data->next_reclaimed);
735 iwl_trans_tx_agg_disable(trans(priv),
736 tid_data->agg.txq_id);
737 iwlagn_dealloc_agg_txq(priv, tid_data->agg.txq_id);
738 tid_data->agg.state = IWL_AGG_OFF;
739 ieee80211_stop_tx_ba_cb_irqsafe(vif, addr, tid);
740 }
741 break;
742 case IWL_EMPTYING_HW_QUEUE_ADDBA:
743 /* There are no packets for this RA / TID in the HW any more */
744 if (tid_data->agg.ssn == tid_data->next_reclaimed) {
745 IWL_DEBUG_TX_QUEUES(priv,
746 "Can continue ADDBA flow ssn = next_recl ="
747 " %d", tid_data->next_reclaimed);
748 tid_data->agg.state = IWL_AGG_ON;
749 ieee80211_start_tx_ba_cb_irqsafe(vif, addr, tid);
750 }
751 break;
752 default:
753 break;
754 }
755 }
756
757 static void iwlagn_non_agg_tx_status(struct iwl_priv *priv,
758 struct iwl_rxon_context *ctx,
759 const u8 *addr1)
760 {
761 struct ieee80211_sta *sta;
762 struct iwl_station_priv *sta_priv;
763
764 rcu_read_lock();
765 sta = ieee80211_find_sta(ctx->vif, addr1);
766 if (sta) {
767 sta_priv = (void *)sta->drv_priv;
768 /* avoid atomic ops if this isn't a client */
769 if (sta_priv->client &&
770 atomic_dec_return(&sta_priv->pending_frames) == 0)
771 ieee80211_sta_block_awake(priv->hw, sta, false);
772 }
773 rcu_read_unlock();
774 }
775
776 /**
777 * translate ucode response to mac80211 tx status control values
778 */
779 static void iwlagn_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
780 struct ieee80211_tx_info *info)
781 {
782 struct ieee80211_tx_rate *r = &info->status.rates[0];
783
784 info->status.antenna =
785 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
786 if (rate_n_flags & RATE_MCS_HT_MSK)
787 r->flags |= IEEE80211_TX_RC_MCS;
788 if (rate_n_flags & RATE_MCS_GF_MSK)
789 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
790 if (rate_n_flags & RATE_MCS_HT40_MSK)
791 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
792 if (rate_n_flags & RATE_MCS_DUP_MSK)
793 r->flags |= IEEE80211_TX_RC_DUP_DATA;
794 if (rate_n_flags & RATE_MCS_SGI_MSK)
795 r->flags |= IEEE80211_TX_RC_SHORT_GI;
796 r->idx = iwlagn_hwrate_to_mac80211_idx(rate_n_flags, info->band);
797 }
798
799 #ifdef CONFIG_IWLWIFI_DEBUG
800 const char *iwl_get_tx_fail_reason(u32 status)
801 {
802 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
803 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
804
805 switch (status & TX_STATUS_MSK) {
806 case TX_STATUS_SUCCESS:
807 return "SUCCESS";
808 TX_STATUS_POSTPONE(DELAY);
809 TX_STATUS_POSTPONE(FEW_BYTES);
810 TX_STATUS_POSTPONE(BT_PRIO);
811 TX_STATUS_POSTPONE(QUIET_PERIOD);
812 TX_STATUS_POSTPONE(CALC_TTAK);
813 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
814 TX_STATUS_FAIL(SHORT_LIMIT);
815 TX_STATUS_FAIL(LONG_LIMIT);
816 TX_STATUS_FAIL(FIFO_UNDERRUN);
817 TX_STATUS_FAIL(DRAIN_FLOW);
818 TX_STATUS_FAIL(RFKILL_FLUSH);
819 TX_STATUS_FAIL(LIFE_EXPIRE);
820 TX_STATUS_FAIL(DEST_PS);
821 TX_STATUS_FAIL(HOST_ABORTED);
822 TX_STATUS_FAIL(BT_RETRY);
823 TX_STATUS_FAIL(STA_INVALID);
824 TX_STATUS_FAIL(FRAG_DROPPED);
825 TX_STATUS_FAIL(TID_DISABLE);
826 TX_STATUS_FAIL(FIFO_FLUSHED);
827 TX_STATUS_FAIL(INSUFFICIENT_CF_POLL);
828 TX_STATUS_FAIL(PASSIVE_NO_RX);
829 TX_STATUS_FAIL(NO_BEACON_ON_RADAR);
830 }
831
832 return "UNKNOWN";
833
834 #undef TX_STATUS_FAIL
835 #undef TX_STATUS_POSTPONE
836 }
837 #endif /* CONFIG_IWLWIFI_DEBUG */
838
839 static void iwlagn_count_agg_tx_err_status(struct iwl_priv *priv, u16 status)
840 {
841 status &= AGG_TX_STATUS_MSK;
842
843 switch (status) {
844 case AGG_TX_STATE_UNDERRUN_MSK:
845 priv->reply_agg_tx_stats.underrun++;
846 break;
847 case AGG_TX_STATE_BT_PRIO_MSK:
848 priv->reply_agg_tx_stats.bt_prio++;
849 break;
850 case AGG_TX_STATE_FEW_BYTES_MSK:
851 priv->reply_agg_tx_stats.few_bytes++;
852 break;
853 case AGG_TX_STATE_ABORT_MSK:
854 priv->reply_agg_tx_stats.abort++;
855 break;
856 case AGG_TX_STATE_LAST_SENT_TTL_MSK:
857 priv->reply_agg_tx_stats.last_sent_ttl++;
858 break;
859 case AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK:
860 priv->reply_agg_tx_stats.last_sent_try++;
861 break;
862 case AGG_TX_STATE_LAST_SENT_BT_KILL_MSK:
863 priv->reply_agg_tx_stats.last_sent_bt_kill++;
864 break;
865 case AGG_TX_STATE_SCD_QUERY_MSK:
866 priv->reply_agg_tx_stats.scd_query++;
867 break;
868 case AGG_TX_STATE_TEST_BAD_CRC32_MSK:
869 priv->reply_agg_tx_stats.bad_crc32++;
870 break;
871 case AGG_TX_STATE_RESPONSE_MSK:
872 priv->reply_agg_tx_stats.response++;
873 break;
874 case AGG_TX_STATE_DUMP_TX_MSK:
875 priv->reply_agg_tx_stats.dump_tx++;
876 break;
877 case AGG_TX_STATE_DELAY_TX_MSK:
878 priv->reply_agg_tx_stats.delay_tx++;
879 break;
880 default:
881 priv->reply_agg_tx_stats.unknown++;
882 break;
883 }
884 }
885
886 static void iwl_rx_reply_tx_agg(struct iwl_priv *priv,
887 struct iwlagn_tx_resp *tx_resp)
888 {
889 struct agg_tx_status *frame_status = &tx_resp->status;
890 int tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
891 IWLAGN_TX_RES_TID_POS;
892 int sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
893 IWLAGN_TX_RES_RA_POS;
894 struct iwl_ht_agg *agg = &priv->tid_data[sta_id][tid].agg;
895 u32 status = le16_to_cpu(tx_resp->status.status);
896 int i;
897
898 WARN_ON(tid == IWL_TID_NON_QOS);
899
900 if (agg->wait_for_ba)
901 IWL_DEBUG_TX_REPLY(priv,
902 "got tx response w/o block-ack\n");
903
904 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
905 agg->wait_for_ba = (tx_resp->frame_count > 1);
906
907 /*
908 * If the BT kill count is non-zero, we'll get this
909 * notification again.
910 */
911 if (tx_resp->bt_kill_count && tx_resp->frame_count == 1 &&
912 cfg(priv)->bt_params &&
913 cfg(priv)->bt_params->advanced_bt_coexist) {
914 IWL_DEBUG_COEX(priv, "receive reply tx w/ bt_kill\n");
915 }
916
917 if (tx_resp->frame_count == 1)
918 return;
919
920 /* Construct bit-map of pending frames within Tx window */
921 for (i = 0; i < tx_resp->frame_count; i++) {
922 u16 fstatus = le16_to_cpu(frame_status[i].status);
923
924 if (status & AGG_TX_STATUS_MSK)
925 iwlagn_count_agg_tx_err_status(priv, fstatus);
926
927 if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
928 AGG_TX_STATE_ABORT_MSK))
929 continue;
930
931 IWL_DEBUG_TX_REPLY(priv, "status %s (0x%08x), "
932 "try-count (0x%08x)\n",
933 iwl_get_agg_tx_fail_reason(fstatus),
934 fstatus & AGG_TX_STATUS_MSK,
935 fstatus & AGG_TX_TRY_MSK);
936 }
937 }
938
939 #ifdef CONFIG_IWLWIFI_DEBUG
940 #define AGG_TX_STATE_FAIL(x) case AGG_TX_STATE_ ## x: return #x
941
942 const char *iwl_get_agg_tx_fail_reason(u16 status)
943 {
944 status &= AGG_TX_STATUS_MSK;
945 switch (status) {
946 case AGG_TX_STATE_TRANSMITTED:
947 return "SUCCESS";
948 AGG_TX_STATE_FAIL(UNDERRUN_MSK);
949 AGG_TX_STATE_FAIL(BT_PRIO_MSK);
950 AGG_TX_STATE_FAIL(FEW_BYTES_MSK);
951 AGG_TX_STATE_FAIL(ABORT_MSK);
952 AGG_TX_STATE_FAIL(LAST_SENT_TTL_MSK);
953 AGG_TX_STATE_FAIL(LAST_SENT_TRY_CNT_MSK);
954 AGG_TX_STATE_FAIL(LAST_SENT_BT_KILL_MSK);
955 AGG_TX_STATE_FAIL(SCD_QUERY_MSK);
956 AGG_TX_STATE_FAIL(TEST_BAD_CRC32_MSK);
957 AGG_TX_STATE_FAIL(RESPONSE_MSK);
958 AGG_TX_STATE_FAIL(DUMP_TX_MSK);
959 AGG_TX_STATE_FAIL(DELAY_TX_MSK);
960 }
961
962 return "UNKNOWN";
963 }
964 #endif /* CONFIG_IWLWIFI_DEBUG */
965
966 static inline u32 iwlagn_get_scd_ssn(struct iwlagn_tx_resp *tx_resp)
967 {
968 return le32_to_cpup((__le32 *)&tx_resp->status +
969 tx_resp->frame_count) & MAX_SN;
970 }
971
972 static void iwlagn_count_tx_err_status(struct iwl_priv *priv, u16 status)
973 {
974 status &= TX_STATUS_MSK;
975
976 switch (status) {
977 case TX_STATUS_POSTPONE_DELAY:
978 priv->reply_tx_stats.pp_delay++;
979 break;
980 case TX_STATUS_POSTPONE_FEW_BYTES:
981 priv->reply_tx_stats.pp_few_bytes++;
982 break;
983 case TX_STATUS_POSTPONE_BT_PRIO:
984 priv->reply_tx_stats.pp_bt_prio++;
985 break;
986 case TX_STATUS_POSTPONE_QUIET_PERIOD:
987 priv->reply_tx_stats.pp_quiet_period++;
988 break;
989 case TX_STATUS_POSTPONE_CALC_TTAK:
990 priv->reply_tx_stats.pp_calc_ttak++;
991 break;
992 case TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY:
993 priv->reply_tx_stats.int_crossed_retry++;
994 break;
995 case TX_STATUS_FAIL_SHORT_LIMIT:
996 priv->reply_tx_stats.short_limit++;
997 break;
998 case TX_STATUS_FAIL_LONG_LIMIT:
999 priv->reply_tx_stats.long_limit++;
1000 break;
1001 case TX_STATUS_FAIL_FIFO_UNDERRUN:
1002 priv->reply_tx_stats.fifo_underrun++;
1003 break;
1004 case TX_STATUS_FAIL_DRAIN_FLOW:
1005 priv->reply_tx_stats.drain_flow++;
1006 break;
1007 case TX_STATUS_FAIL_RFKILL_FLUSH:
1008 priv->reply_tx_stats.rfkill_flush++;
1009 break;
1010 case TX_STATUS_FAIL_LIFE_EXPIRE:
1011 priv->reply_tx_stats.life_expire++;
1012 break;
1013 case TX_STATUS_FAIL_DEST_PS:
1014 priv->reply_tx_stats.dest_ps++;
1015 break;
1016 case TX_STATUS_FAIL_HOST_ABORTED:
1017 priv->reply_tx_stats.host_abort++;
1018 break;
1019 case TX_STATUS_FAIL_BT_RETRY:
1020 priv->reply_tx_stats.bt_retry++;
1021 break;
1022 case TX_STATUS_FAIL_STA_INVALID:
1023 priv->reply_tx_stats.sta_invalid++;
1024 break;
1025 case TX_STATUS_FAIL_FRAG_DROPPED:
1026 priv->reply_tx_stats.frag_drop++;
1027 break;
1028 case TX_STATUS_FAIL_TID_DISABLE:
1029 priv->reply_tx_stats.tid_disable++;
1030 break;
1031 case TX_STATUS_FAIL_FIFO_FLUSHED:
1032 priv->reply_tx_stats.fifo_flush++;
1033 break;
1034 case TX_STATUS_FAIL_INSUFFICIENT_CF_POLL:
1035 priv->reply_tx_stats.insuff_cf_poll++;
1036 break;
1037 case TX_STATUS_FAIL_PASSIVE_NO_RX:
1038 priv->reply_tx_stats.fail_hw_drop++;
1039 break;
1040 case TX_STATUS_FAIL_NO_BEACON_ON_RADAR:
1041 priv->reply_tx_stats.sta_color_mismatch++;
1042 break;
1043 default:
1044 priv->reply_tx_stats.unknown++;
1045 break;
1046 }
1047 }
1048
1049 static void iwlagn_set_tx_status(struct iwl_priv *priv,
1050 struct ieee80211_tx_info *info,
1051 struct iwlagn_tx_resp *tx_resp,
1052 bool is_agg)
1053 {
1054 u16 status = le16_to_cpu(tx_resp->status.status);
1055
1056 info->status.rates[0].count = tx_resp->failure_frame + 1;
1057 if (is_agg)
1058 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1059 info->flags |= iwl_tx_status_to_mac80211(status);
1060 iwlagn_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
1061 info);
1062 if (!iwl_is_tx_success(status))
1063 iwlagn_count_tx_err_status(priv, status);
1064 }
1065
1066 static void iwl_check_abort_status(struct iwl_priv *priv,
1067 u8 frame_count, u32 status)
1068 {
1069 if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) {
1070 IWL_ERR(priv, "Tx flush command to flush out all frames\n");
1071 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
1072 queue_work(priv->workqueue, &priv->tx_flush);
1073 }
1074 }
1075
1076 static int iwl_reclaim(struct iwl_priv *priv, int sta_id, int tid,
1077 int txq_id, int ssn, struct sk_buff_head *skbs)
1078 {
1079 if (unlikely(txq_id >= IWLAGN_FIRST_AMPDU_QUEUE &&
1080 tid != IWL_TID_NON_QOS &&
1081 txq_id != priv->tid_data[sta_id][tid].agg.txq_id)) {
1082 /*
1083 * FIXME: this is a uCode bug which need to be addressed,
1084 * log the information and return for now.
1085 * Since it is can possibly happen very often and in order
1086 * not to fill the syslog, don't use IWL_ERR or IWL_WARN
1087 */
1088 IWL_DEBUG_TX_QUEUES(priv,
1089 "Bad queue mapping txq_id=%d, agg_txq[sta:%d,tid:%d]=%d\n",
1090 txq_id, sta_id, tid,
1091 priv->tid_data[sta_id][tid].agg.txq_id);
1092 return 1;
1093 }
1094
1095 iwl_trans_reclaim(trans(priv), txq_id, ssn, skbs);
1096 return 0;
1097 }
1098
1099 int iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb,
1100 struct iwl_device_cmd *cmd)
1101 {
1102 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1103 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1104 int txq_id = SEQ_TO_QUEUE(sequence);
1105 int cmd_index __maybe_unused = SEQ_TO_INDEX(sequence);
1106 struct iwlagn_tx_resp *tx_resp = (void *)pkt->data;
1107 struct ieee80211_hdr *hdr;
1108 u32 status = le16_to_cpu(tx_resp->status.status);
1109 u16 ssn = iwlagn_get_scd_ssn(tx_resp);
1110 int tid;
1111 int sta_id;
1112 int freed;
1113 struct ieee80211_tx_info *info;
1114 struct sk_buff_head skbs;
1115 struct sk_buff *skb;
1116 struct iwl_rxon_context *ctx;
1117 bool is_agg = (txq_id >= IWLAGN_FIRST_AMPDU_QUEUE);
1118
1119 tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
1120 IWLAGN_TX_RES_TID_POS;
1121 sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
1122 IWLAGN_TX_RES_RA_POS;
1123
1124 spin_lock(&priv->sta_lock);
1125
1126 if (is_agg)
1127 iwl_rx_reply_tx_agg(priv, tx_resp);
1128
1129 __skb_queue_head_init(&skbs);
1130
1131 if (tx_resp->frame_count == 1) {
1132 u16 next_reclaimed = le16_to_cpu(tx_resp->seq_ctl);
1133 next_reclaimed = SEQ_TO_SN(next_reclaimed + 0x10);
1134
1135 if (is_agg) {
1136 /* If this is an aggregation queue, we can rely on the
1137 * ssn since the wifi sequence number corresponds to
1138 * the index in the TFD ring (%256).
1139 * The seq_ctl is the sequence control of the packet
1140 * to which this Tx response relates. But if there is a
1141 * hole in the bitmap of the BA we received, this Tx
1142 * response may allow to reclaim the hole and all the
1143 * subsequent packets that were already acked.
1144 * In that case, seq_ctl != ssn, and the next packet
1145 * to be reclaimed will be ssn and not seq_ctl.
1146 */
1147 next_reclaimed = ssn;
1148 }
1149
1150 if (tid != IWL_TID_NON_QOS) {
1151 priv->tid_data[sta_id][tid].next_reclaimed =
1152 next_reclaimed;
1153 IWL_DEBUG_TX_REPLY(priv, "Next reclaimed packet:%d\n",
1154 next_reclaimed);
1155 }
1156
1157 /*we can free until ssn % q.n_bd not inclusive */
1158 WARN_ON(iwl_reclaim(priv, sta_id, tid, txq_id, ssn, &skbs));
1159 iwlagn_check_ratid_empty(priv, sta_id, tid);
1160 freed = 0;
1161
1162 /* process frames */
1163 skb_queue_walk(&skbs, skb) {
1164 hdr = (struct ieee80211_hdr *)skb->data;
1165
1166 if (!ieee80211_is_data_qos(hdr->frame_control))
1167 priv->last_seq_ctl = tx_resp->seq_ctl;
1168
1169 info = IEEE80211_SKB_CB(skb);
1170 ctx = info->driver_data[0];
1171 kmem_cache_free(iwl_tx_cmd_pool,
1172 (info->driver_data[1]));
1173
1174 memset(&info->status, 0, sizeof(info->status));
1175
1176 if (status == TX_STATUS_FAIL_PASSIVE_NO_RX &&
1177 iwl_is_associated_ctx(ctx) && ctx->vif &&
1178 ctx->vif->type == NL80211_IFTYPE_STATION) {
1179 /* block and stop all queues */
1180 priv->passive_no_rx = true;
1181 IWL_DEBUG_TX_QUEUES(priv, "stop all queues: "
1182 "passive channel");
1183 ieee80211_stop_queues(priv->hw);
1184
1185 IWL_DEBUG_TX_REPLY(priv,
1186 "TXQ %d status %s (0x%08x) "
1187 "rate_n_flags 0x%x retries %d\n",
1188 txq_id,
1189 iwl_get_tx_fail_reason(status),
1190 status,
1191 le32_to_cpu(tx_resp->rate_n_flags),
1192 tx_resp->failure_frame);
1193
1194 IWL_DEBUG_TX_REPLY(priv,
1195 "FrameCnt = %d, idx=%d\n",
1196 tx_resp->frame_count, cmd_index);
1197 }
1198
1199 /* check if BAR is needed */
1200 if (is_agg && !iwl_is_tx_success(status))
1201 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1202 iwlagn_set_tx_status(priv, IEEE80211_SKB_CB(skb),
1203 tx_resp, is_agg);
1204 if (!is_agg)
1205 iwlagn_non_agg_tx_status(priv, ctx, hdr->addr1);
1206
1207 freed++;
1208 }
1209
1210 WARN_ON(!is_agg && freed != 1);
1211 }
1212
1213 iwl_check_abort_status(priv, tx_resp->frame_count, status);
1214 spin_unlock(&priv->sta_lock);
1215
1216 while (!skb_queue_empty(&skbs)) {
1217 skb = __skb_dequeue(&skbs);
1218 ieee80211_tx_status(priv->hw, skb);
1219 }
1220
1221 return 0;
1222 }
1223
1224 /**
1225 * iwlagn_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
1226 *
1227 * Handles block-acknowledge notification from device, which reports success
1228 * of frames sent via aggregation.
1229 */
1230 int iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv,
1231 struct iwl_rx_cmd_buffer *rxb,
1232 struct iwl_device_cmd *cmd)
1233 {
1234 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1235 struct iwl_compressed_ba_resp *ba_resp = (void *)pkt->data;
1236 struct iwl_ht_agg *agg;
1237 struct sk_buff_head reclaimed_skbs;
1238 struct ieee80211_tx_info *info;
1239 struct ieee80211_hdr *hdr;
1240 struct sk_buff *skb;
1241 int sta_id;
1242 int tid;
1243 int freed;
1244
1245 /* "flow" corresponds to Tx queue */
1246 u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
1247
1248 /* "ssn" is start of block-ack Tx window, corresponds to index
1249 * (in Tx queue's circular buffer) of first TFD/frame in window */
1250 u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
1251
1252 if (scd_flow >= cfg(priv)->base_params->num_of_queues) {
1253 IWL_ERR(priv,
1254 "BUG_ON scd_flow is bigger than number of queues\n");
1255 return 0;
1256 }
1257
1258 sta_id = ba_resp->sta_id;
1259 tid = ba_resp->tid;
1260 agg = &priv->tid_data[sta_id][tid].agg;
1261
1262 spin_lock(&priv->sta_lock);
1263
1264 if (unlikely(!agg->wait_for_ba)) {
1265 if (unlikely(ba_resp->bitmap))
1266 IWL_ERR(priv, "Received BA when not expected\n");
1267 spin_unlock(&priv->sta_lock);
1268 return 0;
1269 }
1270
1271 __skb_queue_head_init(&reclaimed_skbs);
1272
1273 /* Release all TFDs before the SSN, i.e. all TFDs in front of
1274 * block-ack window (we assume that they've been successfully
1275 * transmitted ... if not, it's too late anyway). */
1276 if (iwl_reclaim(priv, sta_id, tid, scd_flow,
1277 ba_resp_scd_ssn, &reclaimed_skbs)) {
1278 spin_unlock(&priv->sta_lock);
1279 return 0;
1280 }
1281
1282 IWL_DEBUG_TX_REPLY(priv, "REPLY_COMPRESSED_BA [%d] Received from %pM, "
1283 "sta_id = %d\n",
1284 agg->wait_for_ba,
1285 (u8 *) &ba_resp->sta_addr_lo32,
1286 ba_resp->sta_id);
1287 IWL_DEBUG_TX_REPLY(priv, "TID = %d, SeqCtl = %d, bitmap = 0x%llx, "
1288 "scd_flow = %d, scd_ssn = %d\n",
1289 ba_resp->tid, le16_to_cpu(ba_resp->seq_ctl),
1290 (unsigned long long)le64_to_cpu(ba_resp->bitmap),
1291 scd_flow, ba_resp_scd_ssn);
1292
1293 /* Mark that the expected block-ack response arrived */
1294 agg->wait_for_ba = false;
1295
1296 /* Sanity check values reported by uCode */
1297 if (ba_resp->txed_2_done > ba_resp->txed) {
1298 IWL_DEBUG_TX_REPLY(priv,
1299 "bogus sent(%d) and ack(%d) count\n",
1300 ba_resp->txed, ba_resp->txed_2_done);
1301 /*
1302 * set txed_2_done = txed,
1303 * so it won't impact rate scale
1304 */
1305 ba_resp->txed = ba_resp->txed_2_done;
1306 }
1307 IWL_DEBUG_HT(priv, "agg frames sent:%d, acked:%d\n",
1308 ba_resp->txed, ba_resp->txed_2_done);
1309
1310 priv->tid_data[sta_id][tid].next_reclaimed = ba_resp_scd_ssn;
1311
1312 iwlagn_check_ratid_empty(priv, sta_id, tid);
1313 freed = 0;
1314
1315 skb_queue_walk(&reclaimed_skbs, skb) {
1316 hdr = (struct ieee80211_hdr *)skb->data;
1317
1318 if (ieee80211_is_data_qos(hdr->frame_control))
1319 freed++;
1320 else
1321 WARN_ON_ONCE(1);
1322
1323 info = IEEE80211_SKB_CB(skb);
1324 kmem_cache_free(iwl_tx_cmd_pool, (info->driver_data[1]));
1325
1326 if (freed == 1) {
1327 /* this is the first skb we deliver in this batch */
1328 /* put the rate scaling data there */
1329 info = IEEE80211_SKB_CB(skb);
1330 memset(&info->status, 0, sizeof(info->status));
1331 info->flags |= IEEE80211_TX_STAT_ACK;
1332 info->flags |= IEEE80211_TX_STAT_AMPDU;
1333 info->status.ampdu_ack_len = ba_resp->txed_2_done;
1334 info->status.ampdu_len = ba_resp->txed;
1335 iwlagn_hwrate_to_tx_control(priv, agg->rate_n_flags,
1336 info);
1337 }
1338 }
1339
1340 spin_unlock(&priv->sta_lock);
1341
1342 while (!skb_queue_empty(&reclaimed_skbs)) {
1343 skb = __skb_dequeue(&reclaimed_skbs);
1344 ieee80211_tx_status(priv->hw, skb);
1345 }
1346
1347 return 0;
1348 }
Linux kernel - Deliverables
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