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net/mlx4_en: Move filters cleanup to a proper location
[linux/fpc-iii.git] / drivers / net / wireless / intel / iwlwifi / dvm / tx.c
blob4b97371c3b4291a8abf8ea5c9793f52351486d48
1 /******************************************************************************
2 *
3 * GPL LICENSE SUMMARY
4 *
5 * Copyright(c) 2008 - 2014 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 <linuxwifi@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/sched.h>
33 #include <linux/ieee80211.h>
34 #include "iwl-io.h"
35 #include "iwl-trans.h"
36 #include "iwl-agn-hw.h"
37 #include "dev.h"
38 #include "agn.h"
39
40 static const u8 tid_to_ac[] = {
41 IEEE80211_AC_BE,
42 IEEE80211_AC_BK,
43 IEEE80211_AC_BK,
44 IEEE80211_AC_BE,
45 IEEE80211_AC_VI,
46 IEEE80211_AC_VI,
47 IEEE80211_AC_VO,
48 IEEE80211_AC_VO,
49 };
50
51 static void iwlagn_tx_cmd_protection(struct iwl_priv *priv,
52 struct ieee80211_tx_info *info,
53 __le16 fc, __le32 *tx_flags)
54 {
55 if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS ||
56 info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT ||
57 info->flags & IEEE80211_TX_CTL_AMPDU)
58 *tx_flags |= TX_CMD_FLG_PROT_REQUIRE_MSK;
59 }
60
61 /*
62 * handle build REPLY_TX command notification.
63 */
64 static void iwlagn_tx_cmd_build_basic(struct iwl_priv *priv,
65 struct sk_buff *skb,
66 struct iwl_tx_cmd *tx_cmd,
67 struct ieee80211_tx_info *info,
68 struct ieee80211_hdr *hdr, u8 sta_id)
69 {
70 __le16 fc = hdr->frame_control;
71 __le32 tx_flags = tx_cmd->tx_flags;
72
73 tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
74
75 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
76 tx_flags |= TX_CMD_FLG_ACK_MSK;
77 else
78 tx_flags &= ~TX_CMD_FLG_ACK_MSK;
79
80 if (ieee80211_is_probe_resp(fc))
81 tx_flags |= TX_CMD_FLG_TSF_MSK;
82 else if (ieee80211_is_back_req(fc))
83 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK;
84 else if (info->band == NL80211_BAND_2GHZ &&
85 priv->lib->bt_params &&
86 priv->lib->bt_params->advanced_bt_coexist &&
87 (ieee80211_is_auth(fc) || ieee80211_is_assoc_req(fc) ||
88 ieee80211_is_reassoc_req(fc) ||
89 info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO))
90 tx_flags |= TX_CMD_FLG_IGNORE_BT;
91
92
93 tx_cmd->sta_id = sta_id;
94 if (ieee80211_has_morefrags(fc))
95 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
96
97 if (ieee80211_is_data_qos(fc)) {
98 u8 *qc = ieee80211_get_qos_ctl(hdr);
99 tx_cmd->tid_tspec = qc[0] & 0xf;
100 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
101 } else {
102 tx_cmd->tid_tspec = IWL_TID_NON_QOS;
103 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
104 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
105 else
106 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
107 }
108
109 iwlagn_tx_cmd_protection(priv, info, fc, &tx_flags);
110
111 tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
112 if (ieee80211_is_mgmt(fc)) {
113 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
114 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
115 else
116 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
117 } else {
118 tx_cmd->timeout.pm_frame_timeout = 0;
119 }
120
121 tx_cmd->driver_txop = 0;
122 tx_cmd->tx_flags = tx_flags;
123 tx_cmd->next_frame_len = 0;
124 }
125
126 static void iwlagn_tx_cmd_build_rate(struct iwl_priv *priv,
127 struct iwl_tx_cmd *tx_cmd,
128 struct ieee80211_tx_info *info,
129 struct ieee80211_sta *sta,
130 __le16 fc)
131 {
132 u32 rate_flags;
133 int rate_idx;
134 u8 rts_retry_limit;
135 u8 data_retry_limit;
136 u8 rate_plcp;
137
138 if (priv->wowlan) {
139 rts_retry_limit = IWLAGN_LOW_RETRY_LIMIT;
140 data_retry_limit = IWLAGN_LOW_RETRY_LIMIT;
141 } else {
142 /* Set retry limit on RTS packets */
143 rts_retry_limit = IWLAGN_RTS_DFAULT_RETRY_LIMIT;
144
145 /* Set retry limit on DATA packets and Probe Responses*/
146 if (ieee80211_is_probe_resp(fc)) {
147 data_retry_limit = IWLAGN_MGMT_DFAULT_RETRY_LIMIT;
148 rts_retry_limit =
149 min(data_retry_limit, rts_retry_limit);
150 } else if (ieee80211_is_back_req(fc))
151 data_retry_limit = IWLAGN_BAR_DFAULT_RETRY_LIMIT;
152 else
153 data_retry_limit = IWLAGN_DEFAULT_TX_RETRY;
154 }
155
156 tx_cmd->data_retry_limit = data_retry_limit;
157 tx_cmd->rts_retry_limit = rts_retry_limit;
158
159 /* DATA packets will use the uCode station table for rate/antenna
160 * selection */
161 if (ieee80211_is_data(fc)) {
162 tx_cmd->initial_rate_index = 0;
163 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
164 return;
165 } else if (ieee80211_is_back_req(fc))
166 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
167
168 /**
169 * If the current TX rate stored in mac80211 has the MCS bit set, it's
170 * not really a TX rate. Thus, we use the lowest supported rate for
171 * this band. Also use the lowest supported rate if the stored rate
172 * index is invalid.
173 */
174 rate_idx = info->control.rates[0].idx;
175 if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS ||
176 (rate_idx < 0) || (rate_idx > IWL_RATE_COUNT_LEGACY))
177 rate_idx = rate_lowest_index(
178 &priv->nvm_data->bands[info->band], sta);
179 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
180 if (info->band == NL80211_BAND_5GHZ)
181 rate_idx += IWL_FIRST_OFDM_RATE;
182 /* Get PLCP rate for tx_cmd->rate_n_flags */
183 rate_plcp = iwl_rates[rate_idx].plcp;
184 /* Zero out flags for this packet */
185 rate_flags = 0;
186
187 /* Set CCK flag as needed */
188 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
189 rate_flags |= RATE_MCS_CCK_MSK;
190
191 /* Set up antennas */
192 if (priv->lib->bt_params &&
193 priv->lib->bt_params->advanced_bt_coexist &&
194 priv->bt_full_concurrent) {
195 /* operated as 1x1 in full concurrency mode */
196 priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
197 first_antenna(priv->nvm_data->valid_tx_ant));
198 } else
199 priv->mgmt_tx_ant = iwl_toggle_tx_ant(
200 priv, priv->mgmt_tx_ant,
201 priv->nvm_data->valid_tx_ant);
202 rate_flags |= iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
203
204 /* Set the rate in the TX cmd */
205 tx_cmd->rate_n_flags = iwl_hw_set_rate_n_flags(rate_plcp, rate_flags);
206 }
207
208 static void iwlagn_tx_cmd_build_hwcrypto(struct iwl_priv *priv,
209 struct ieee80211_tx_info *info,
210 struct iwl_tx_cmd *tx_cmd,
211 struct sk_buff *skb_frag)
212 {
213 struct ieee80211_key_conf *keyconf = info->control.hw_key;
214
215 switch (keyconf->cipher) {
216 case WLAN_CIPHER_SUITE_CCMP:
217 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
218 memcpy(tx_cmd->key, keyconf->key, keyconf->keylen);
219 if (info->flags & IEEE80211_TX_CTL_AMPDU)
220 tx_cmd->tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
221 break;
222
223 case WLAN_CIPHER_SUITE_TKIP:
224 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
225 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
226 break;
227
228 case WLAN_CIPHER_SUITE_WEP104:
229 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
230 /* fall through */
231 case WLAN_CIPHER_SUITE_WEP40:
232 tx_cmd->sec_ctl |= (TX_CMD_SEC_WEP |
233 (keyconf->keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT);
234
235 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
236
237 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
238 "with key %d\n", keyconf->keyidx);
239 break;
240
241 default:
242 IWL_ERR(priv, "Unknown encode cipher %x\n", keyconf->cipher);
243 break;
244 }
245 }
246
247 /**
248 * iwl_sta_id_or_broadcast - return sta_id or broadcast sta
249 * @context: the current context
250 * @sta: mac80211 station
251 *
252 * In certain circumstances mac80211 passes a station pointer
253 * that may be %NULL, for example during TX or key setup. In
254 * that case, we need to use the broadcast station, so this
255 * inline wraps that pattern.
256 */
257 static int iwl_sta_id_or_broadcast(struct iwl_rxon_context *context,
258 struct ieee80211_sta *sta)
259 {
260 int sta_id;
261
262 if (!sta)
263 return context->bcast_sta_id;
264
265 sta_id = iwl_sta_id(sta);
266
267 /*
268 * mac80211 should not be passing a partially
269 * initialised station!
270 */
271 WARN_ON(sta_id == IWL_INVALID_STATION);
272
273 return sta_id;
274 }
275
276 /*
277 * start REPLY_TX command process
278 */
279 int iwlagn_tx_skb(struct iwl_priv *priv,
280 struct ieee80211_sta *sta,
281 struct sk_buff *skb)
282 {
283 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
284 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
285 struct iwl_station_priv *sta_priv = NULL;
286 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
287 struct iwl_device_cmd *dev_cmd;
288 struct iwl_tx_cmd *tx_cmd;
289 __le16 fc;
290 u8 hdr_len;
291 u16 len, seq_number = 0;
292 u8 sta_id, tid = IWL_MAX_TID_COUNT;
293 bool is_agg = false, is_data_qos = false;
294 int txq_id;
295
296 if (info->control.vif)
297 ctx = iwl_rxon_ctx_from_vif(info->control.vif);
298
299 if (iwl_is_rfkill(priv)) {
300 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
301 goto drop_unlock_priv;
302 }
303
304 fc = hdr->frame_control;
305
306 #ifdef CONFIG_IWLWIFI_DEBUG
307 if (ieee80211_is_auth(fc))
308 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
309 else if (ieee80211_is_assoc_req(fc))
310 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
311 else if (ieee80211_is_reassoc_req(fc))
312 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
313 #endif
314
315 if (unlikely(ieee80211_is_probe_resp(fc))) {
316 struct iwl_wipan_noa_data *noa_data =
317 rcu_dereference(priv->noa_data);
318
319 if (noa_data &&
320 pskb_expand_head(skb, 0, noa_data->length,
321 GFP_ATOMIC) == 0) {
322 memcpy(skb_put(skb, noa_data->length),
323 noa_data->data, noa_data->length);
324 hdr = (struct ieee80211_hdr *)skb->data;
325 }
326 }
327
328 hdr_len = ieee80211_hdrlen(fc);
329
330 /* For management frames use broadcast id to do not break aggregation */
331 if (!ieee80211_is_data(fc))
332 sta_id = ctx->bcast_sta_id;
333 else {
334 /* Find index into station table for destination station */
335 sta_id = iwl_sta_id_or_broadcast(ctx, sta);
336 if (sta_id == IWL_INVALID_STATION) {
337 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
338 hdr->addr1);
339 goto drop_unlock_priv;
340 }
341 }
342
343 if (sta)
344 sta_priv = (void *)sta->drv_priv;
345
346 if (sta_priv && sta_priv->asleep &&
347 (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER)) {
348 /*
349 * This sends an asynchronous command to the device,
350 * but we can rely on it being processed before the
351 * next frame is processed -- and the next frame to
352 * this station is the one that will consume this
353 * counter.
354 * For now set the counter to just 1 since we do not
355 * support uAPSD yet.
356 *
357 * FIXME: If we get two non-bufferable frames one
358 * after the other, we might only send out one of
359 * them because this is racy.
360 */
361 iwl_sta_modify_sleep_tx_count(priv, sta_id, 1);
362 }
363
364 dev_cmd = iwl_trans_alloc_tx_cmd(priv->trans);
365
366 if (unlikely(!dev_cmd))
367 goto drop_unlock_priv;
368
369 memset(dev_cmd, 0, sizeof(*dev_cmd));
370 dev_cmd->hdr.cmd = REPLY_TX;
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 memset(info->driver_data, 0, sizeof(info->driver_data));
387
388 info->driver_data[0] = ctx;
389 info->driver_data[1] = dev_cmd;
390 /* From now on, we cannot access info->control */
391
392 spin_lock(&priv->sta_lock);
393
394 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
395 u8 *qc = NULL;
396 struct iwl_tid_data *tid_data;
397 qc = ieee80211_get_qos_ctl(hdr);
398 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
399 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
400 goto drop_unlock_sta;
401 tid_data = &priv->tid_data[sta_id][tid];
402
403 /* aggregation is on for this <sta,tid> */
404 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
405 tid_data->agg.state != IWL_AGG_ON) {
406 IWL_ERR(priv,
407 "TX_CTL_AMPDU while not in AGG: Tx flags = 0x%08x, agg.state = %d\n",
408 info->flags, tid_data->agg.state);
409 IWL_ERR(priv, "sta_id = %d, tid = %d seq_num = %d\n",
410 sta_id, tid,
411 IEEE80211_SEQ_TO_SN(tid_data->seq_number));
412 goto drop_unlock_sta;
413 }
414
415 /* We can receive packets from the stack in IWL_AGG_{ON,OFF}
416 * only. Check this here.
417 */
418 if (WARN_ONCE(tid_data->agg.state != IWL_AGG_ON &&
419 tid_data->agg.state != IWL_AGG_OFF,
420 "Tx while agg.state = %d\n", tid_data->agg.state))
421 goto drop_unlock_sta;
422
423 seq_number = tid_data->seq_number;
424 seq_number &= IEEE80211_SCTL_SEQ;
425 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
426 hdr->seq_ctrl |= cpu_to_le16(seq_number);
427 seq_number += 0x10;
428
429 if (info->flags & IEEE80211_TX_CTL_AMPDU)
430 is_agg = true;
431 is_data_qos = true;
432 }
433
434 /* Copy MAC header from skb into command buffer */
435 memcpy(tx_cmd->hdr, hdr, hdr_len);
436
437 txq_id = info->hw_queue;
438
439 if (is_agg)
440 txq_id = priv->tid_data[sta_id][tid].agg.txq_id;
441 else if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) {
442 /*
443 * The microcode will clear the more data
444 * bit in the last frame it transmits.
445 */
446 hdr->frame_control |=
447 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
448 }
449
450 WARN_ON_ONCE(is_agg &&
451 priv->queue_to_mac80211[txq_id] != info->hw_queue);
452
453 IWL_DEBUG_TX(priv, "TX to [%d|%d] Q:%d - seq: 0x%x\n", sta_id, tid,
454 txq_id, seq_number);
455
456 if (iwl_trans_tx(priv->trans, skb, dev_cmd, txq_id))
457 goto drop_unlock_sta;
458
459 if (is_data_qos && !ieee80211_has_morefrags(fc))
460 priv->tid_data[sta_id][tid].seq_number = seq_number;
461
462 spin_unlock(&priv->sta_lock);
463
464 /*
465 * Avoid atomic ops if it isn't an associated client.
466 * Also, if this is a packet for aggregation, don't
467 * increase the counter because the ucode will stop
468 * aggregation queues when their respective station
469 * goes to sleep.
470 */
471 if (sta_priv && sta_priv->client && !is_agg)
472 atomic_inc(&sta_priv->pending_frames);
473
474 return 0;
475
476 drop_unlock_sta:
477 if (dev_cmd)
478 iwl_trans_free_tx_cmd(priv->trans, dev_cmd);
479 spin_unlock(&priv->sta_lock);
480 drop_unlock_priv:
481 return -1;
482 }
483
484 static int iwlagn_alloc_agg_txq(struct iwl_priv *priv, int mq)
485 {
486 int q;
487
488 for (q = IWLAGN_FIRST_AMPDU_QUEUE;
489 q < priv->cfg->base_params->num_of_queues; q++) {
490 if (!test_and_set_bit(q, priv->agg_q_alloc)) {
491 priv->queue_to_mac80211[q] = mq;
492 return q;
493 }
494 }
495
496 return -ENOSPC;
497 }
498
499 static void iwlagn_dealloc_agg_txq(struct iwl_priv *priv, int q)
500 {
501 clear_bit(q, priv->agg_q_alloc);
502 priv->queue_to_mac80211[q] = IWL_INVALID_MAC80211_QUEUE;
503 }
504
505 int iwlagn_tx_agg_stop(struct iwl_priv *priv, struct ieee80211_vif *vif,
506 struct ieee80211_sta *sta, u16 tid)
507 {
508 struct iwl_tid_data *tid_data;
509 int sta_id, txq_id;
510 enum iwl_agg_state agg_state;
511
512 sta_id = iwl_sta_id(sta);
513
514 if (sta_id == IWL_INVALID_STATION) {
515 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
516 return -ENXIO;
517 }
518
519 spin_lock_bh(&priv->sta_lock);
520
521 tid_data = &priv->tid_data[sta_id][tid];
522 txq_id = tid_data->agg.txq_id;
523
524 switch (tid_data->agg.state) {
525 case IWL_EMPTYING_HW_QUEUE_ADDBA:
526 /*
527 * This can happen if the peer stops aggregation
528 * again before we've had a chance to drain the
529 * queue we selected previously, i.e. before the
530 * session was really started completely.
531 */
532 IWL_DEBUG_HT(priv, "AGG stop before setup done\n");
533 goto turn_off;
534 case IWL_AGG_STARTING:
535 /*
536 * This can happen when the session is stopped before
537 * we receive ADDBA response
538 */
539 IWL_DEBUG_HT(priv, "AGG stop before AGG became operational\n");
540 goto turn_off;
541 case IWL_AGG_ON:
542 break;
543 default:
544 IWL_WARN(priv,
545 "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
546 sta_id, tid, tid_data->agg.state);
547 spin_unlock_bh(&priv->sta_lock);
548 return 0;
549 }
550
551 tid_data->agg.ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
552
553 /* There are still packets for this RA / TID in the HW */
554 if (!test_bit(txq_id, priv->agg_q_alloc)) {
555 IWL_DEBUG_TX_QUEUES(priv,
556 "stopping AGG on STA/TID %d/%d but hwq %d not used\n",
557 sta_id, tid, txq_id);
558 } else if (tid_data->agg.ssn != tid_data->next_reclaimed) {
559 IWL_DEBUG_TX_QUEUES(priv,
560 "Can't proceed: ssn %d, next_recl = %d\n",
561 tid_data->agg.ssn,
562 tid_data->next_reclaimed);
563 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_DELBA;
564 spin_unlock_bh(&priv->sta_lock);
565 return 0;
566 }
567
568 IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d\n",
569 tid_data->agg.ssn);
570 turn_off:
571 agg_state = tid_data->agg.state;
572 tid_data->agg.state = IWL_AGG_OFF;
573
574 spin_unlock_bh(&priv->sta_lock);
575
576 if (test_bit(txq_id, priv->agg_q_alloc)) {
577 /*
578 * If the transport didn't know that we wanted to start
579 * agreggation, don't tell it that we want to stop them.
580 * This can happen when we don't get the addBA response on
581 * time, or we hadn't time to drain the AC queues.
582 */
583 if (agg_state == IWL_AGG_ON)
584 iwl_trans_txq_disable(priv->trans, txq_id, true);
585 else
586 IWL_DEBUG_TX_QUEUES(priv, "Don't disable tx agg: %d\n",
587 agg_state);
588 iwlagn_dealloc_agg_txq(priv, txq_id);
589 }
590
591 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
592
593 return 0;
594 }
595
596 int iwlagn_tx_agg_start(struct iwl_priv *priv, struct ieee80211_vif *vif,
597 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
598 {
599 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
600 struct iwl_tid_data *tid_data;
601 int sta_id, txq_id, ret;
602
603 IWL_DEBUG_HT(priv, "TX AGG request on ra = %pM tid = %d\n",
604 sta->addr, tid);
605
606 sta_id = iwl_sta_id(sta);
607 if (sta_id == IWL_INVALID_STATION) {
608 IWL_ERR(priv, "Start AGG on invalid station\n");
609 return -ENXIO;
610 }
611 if (unlikely(tid >= IWL_MAX_TID_COUNT))
612 return -EINVAL;
613
614 if (priv->tid_data[sta_id][tid].agg.state != IWL_AGG_OFF) {
615 IWL_ERR(priv, "Start AGG when state is not IWL_AGG_OFF !\n");
616 return -ENXIO;
617 }
618
619 txq_id = iwlagn_alloc_agg_txq(priv, ctx->ac_to_queue[tid_to_ac[tid]]);
620 if (txq_id < 0) {
621 IWL_DEBUG_TX_QUEUES(priv,
622 "No free aggregation queue for %pM/%d\n",
623 sta->addr, tid);
624 return txq_id;
625 }
626
627 ret = iwl_sta_tx_modify_enable_tid(priv, sta_id, tid);
628 if (ret)
629 return ret;
630
631 spin_lock_bh(&priv->sta_lock);
632 tid_data = &priv->tid_data[sta_id][tid];
633 tid_data->agg.ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
634 tid_data->agg.txq_id = txq_id;
635
636 *ssn = tid_data->agg.ssn;
637
638 if (*ssn == tid_data->next_reclaimed) {
639 IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d\n",
640 tid_data->agg.ssn);
641 tid_data->agg.state = IWL_AGG_STARTING;
642 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
643 } else {
644 IWL_DEBUG_TX_QUEUES(priv, "Can't proceed: ssn %d, "
645 "next_reclaimed = %d\n",
646 tid_data->agg.ssn,
647 tid_data->next_reclaimed);
648 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA;
649 }
650 spin_unlock_bh(&priv->sta_lock);
651
652 return ret;
653 }
654
655 int iwlagn_tx_agg_flush(struct iwl_priv *priv, struct ieee80211_vif *vif,
656 struct ieee80211_sta *sta, u16 tid)
657 {
658 struct iwl_tid_data *tid_data;
659 enum iwl_agg_state agg_state;
660 int sta_id, txq_id;
661 sta_id = iwl_sta_id(sta);
662
663 /*
664 * First set the agg state to OFF to avoid calling
665 * ieee80211_stop_tx_ba_cb in iwlagn_check_ratid_empty.
666 */
667 spin_lock_bh(&priv->sta_lock);
668
669 tid_data = &priv->tid_data[sta_id][tid];
670 txq_id = tid_data->agg.txq_id;
671 agg_state = tid_data->agg.state;
672 IWL_DEBUG_TX_QUEUES(priv, "Flush AGG: sta %d tid %d q %d state %d\n",
673 sta_id, tid, txq_id, tid_data->agg.state);
674
675 tid_data->agg.state = IWL_AGG_OFF;
676
677 spin_unlock_bh(&priv->sta_lock);
678
679 if (iwlagn_txfifo_flush(priv, BIT(txq_id)))
680 IWL_ERR(priv, "Couldn't flush the AGG queue\n");
681
682 if (test_bit(txq_id, priv->agg_q_alloc)) {
683 /*
684 * If the transport didn't know that we wanted to start
685 * agreggation, don't tell it that we want to stop them.
686 * This can happen when we don't get the addBA response on
687 * time, or we hadn't time to drain the AC queues.
688 */
689 if (agg_state == IWL_AGG_ON)
690 iwl_trans_txq_disable(priv->trans, txq_id, true);
691 else
692 IWL_DEBUG_TX_QUEUES(priv, "Don't disable tx agg: %d\n",
693 agg_state);
694 iwlagn_dealloc_agg_txq(priv, txq_id);
695 }
696
697 return 0;
698 }
699
700 int iwlagn_tx_agg_oper(struct iwl_priv *priv, struct ieee80211_vif *vif,
701 struct ieee80211_sta *sta, u16 tid, u8 buf_size)
702 {
703 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
704 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
705 int q, fifo;
706 u16 ssn;
707
708 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
709
710 spin_lock_bh(&priv->sta_lock);
711 ssn = priv->tid_data[sta_priv->sta_id][tid].agg.ssn;
712 q = priv->tid_data[sta_priv->sta_id][tid].agg.txq_id;
713 priv->tid_data[sta_priv->sta_id][tid].agg.state = IWL_AGG_ON;
714 spin_unlock_bh(&priv->sta_lock);
715
716 fifo = ctx->ac_to_fifo[tid_to_ac[tid]];
717
718 iwl_trans_txq_enable(priv->trans, q, fifo, sta_priv->sta_id, tid,
719 buf_size, ssn, 0);
720
721 /*
722 * If the limit is 0, then it wasn't initialised yet,
723 * use the default. We can do that since we take the
724 * minimum below, and we don't want to go above our
725 * default due to hardware restrictions.
726 */
727 if (sta_priv->max_agg_bufsize == 0)
728 sta_priv->max_agg_bufsize =
729 LINK_QUAL_AGG_FRAME_LIMIT_DEF;
730
731 /*
732 * Even though in theory the peer could have different
733 * aggregation reorder buffer sizes for different sessions,
734 * our ucode doesn't allow for that and has a global limit
735 * for each station. Therefore, use the minimum of all the
736 * aggregation sessions and our default value.
737 */
738 sta_priv->max_agg_bufsize =
739 min(sta_priv->max_agg_bufsize, buf_size);
740
741 if (priv->hw_params.use_rts_for_aggregation) {
742 /*
743 * switch to RTS/CTS if it is the prefer protection
744 * method for HT traffic
745 */
746
747 sta_priv->lq_sta.lq.general_params.flags |=
748 LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
749 }
750 priv->agg_tids_count++;
751 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
752 priv->agg_tids_count);
753
754 sta_priv->lq_sta.lq.agg_params.agg_frame_cnt_limit =
755 sta_priv->max_agg_bufsize;
756
757 IWL_DEBUG_HT(priv, "Tx aggregation enabled on ra = %pM tid = %d\n",
758 sta->addr, tid);
759
760 return iwl_send_lq_cmd(priv, ctx,
761 &sta_priv->lq_sta.lq, CMD_ASYNC, false);
762 }
763
764 static void iwlagn_check_ratid_empty(struct iwl_priv *priv, int sta_id, u8 tid)
765 {
766 struct iwl_tid_data *tid_data = &priv->tid_data[sta_id][tid];
767 enum iwl_rxon_context_id ctx;
768 struct ieee80211_vif *vif;
769 u8 *addr;
770
771 lockdep_assert_held(&priv->sta_lock);
772
773 addr = priv->stations[sta_id].sta.sta.addr;
774 ctx = priv->stations[sta_id].ctxid;
775 vif = priv->contexts[ctx].vif;
776
777 switch (priv->tid_data[sta_id][tid].agg.state) {
778 case IWL_EMPTYING_HW_QUEUE_DELBA:
779 /* There are no packets for this RA / TID in the HW any more */
780 if (tid_data->agg.ssn == tid_data->next_reclaimed) {
781 IWL_DEBUG_TX_QUEUES(priv,
782 "Can continue DELBA flow ssn = next_recl = %d\n",
783 tid_data->next_reclaimed);
784 iwl_trans_txq_disable(priv->trans,
785 tid_data->agg.txq_id, true);
786 iwlagn_dealloc_agg_txq(priv, tid_data->agg.txq_id);
787 tid_data->agg.state = IWL_AGG_OFF;
788 ieee80211_stop_tx_ba_cb_irqsafe(vif, addr, tid);
789 }
790 break;
791 case IWL_EMPTYING_HW_QUEUE_ADDBA:
792 /* There are no packets for this RA / TID in the HW any more */
793 if (tid_data->agg.ssn == tid_data->next_reclaimed) {
794 IWL_DEBUG_TX_QUEUES(priv,
795 "Can continue ADDBA flow ssn = next_recl = %d\n",
796 tid_data->next_reclaimed);
797 tid_data->agg.state = IWL_AGG_STARTING;
798 ieee80211_start_tx_ba_cb_irqsafe(vif, addr, tid);
799 }
800 break;
801 default:
802 break;
803 }
804 }
805
806 static void iwlagn_non_agg_tx_status(struct iwl_priv *priv,
807 struct iwl_rxon_context *ctx,
808 const u8 *addr1)
809 {
810 struct ieee80211_sta *sta;
811 struct iwl_station_priv *sta_priv;
812
813 rcu_read_lock();
814 sta = ieee80211_find_sta(ctx->vif, addr1);
815 if (sta) {
816 sta_priv = (void *)sta->drv_priv;
817 /* avoid atomic ops if this isn't a client */
818 if (sta_priv->client &&
819 atomic_dec_return(&sta_priv->pending_frames) == 0)
820 ieee80211_sta_block_awake(priv->hw, sta, false);
821 }
822 rcu_read_unlock();
823 }
824
825 /**
826 * translate ucode response to mac80211 tx status control values
827 */
828 static void iwlagn_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
829 struct ieee80211_tx_info *info)
830 {
831 struct ieee80211_tx_rate *r = &info->status.rates[0];
832
833 info->status.antenna =
834 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
835 if (rate_n_flags & RATE_MCS_HT_MSK)
836 r->flags |= IEEE80211_TX_RC_MCS;
837 if (rate_n_flags & RATE_MCS_GF_MSK)
838 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
839 if (rate_n_flags & RATE_MCS_HT40_MSK)
840 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
841 if (rate_n_flags & RATE_MCS_DUP_MSK)
842 r->flags |= IEEE80211_TX_RC_DUP_DATA;
843 if (rate_n_flags & RATE_MCS_SGI_MSK)
844 r->flags |= IEEE80211_TX_RC_SHORT_GI;
845 r->idx = iwlagn_hwrate_to_mac80211_idx(rate_n_flags, info->band);
846 }
847
848 #ifdef CONFIG_IWLWIFI_DEBUG
849 const char *iwl_get_tx_fail_reason(u32 status)
850 {
851 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
852 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
853
854 switch (status & TX_STATUS_MSK) {
855 case TX_STATUS_SUCCESS:
856 return "SUCCESS";
857 TX_STATUS_POSTPONE(DELAY);
858 TX_STATUS_POSTPONE(FEW_BYTES);
859 TX_STATUS_POSTPONE(BT_PRIO);
860 TX_STATUS_POSTPONE(QUIET_PERIOD);
861 TX_STATUS_POSTPONE(CALC_TTAK);
862 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
863 TX_STATUS_FAIL(SHORT_LIMIT);
864 TX_STATUS_FAIL(LONG_LIMIT);
865 TX_STATUS_FAIL(FIFO_UNDERRUN);
866 TX_STATUS_FAIL(DRAIN_FLOW);
867 TX_STATUS_FAIL(RFKILL_FLUSH);
868 TX_STATUS_FAIL(LIFE_EXPIRE);
869 TX_STATUS_FAIL(DEST_PS);
870 TX_STATUS_FAIL(HOST_ABORTED);
871 TX_STATUS_FAIL(BT_RETRY);
872 TX_STATUS_FAIL(STA_INVALID);
873 TX_STATUS_FAIL(FRAG_DROPPED);
874 TX_STATUS_FAIL(TID_DISABLE);
875 TX_STATUS_FAIL(FIFO_FLUSHED);
876 TX_STATUS_FAIL(INSUFFICIENT_CF_POLL);
877 TX_STATUS_FAIL(PASSIVE_NO_RX);
878 TX_STATUS_FAIL(NO_BEACON_ON_RADAR);
879 }
880
881 return "UNKNOWN";
882
883 #undef TX_STATUS_FAIL
884 #undef TX_STATUS_POSTPONE
885 }
886 #endif /* CONFIG_IWLWIFI_DEBUG */
887
888 static void iwlagn_count_agg_tx_err_status(struct iwl_priv *priv, u16 status)
889 {
890 status &= AGG_TX_STATUS_MSK;
891
892 switch (status) {
893 case AGG_TX_STATE_UNDERRUN_MSK:
894 priv->reply_agg_tx_stats.underrun++;
895 break;
896 case AGG_TX_STATE_BT_PRIO_MSK:
897 priv->reply_agg_tx_stats.bt_prio++;
898 break;
899 case AGG_TX_STATE_FEW_BYTES_MSK:
900 priv->reply_agg_tx_stats.few_bytes++;
901 break;
902 case AGG_TX_STATE_ABORT_MSK:
903 priv->reply_agg_tx_stats.abort++;
904 break;
905 case AGG_TX_STATE_LAST_SENT_TTL_MSK:
906 priv->reply_agg_tx_stats.last_sent_ttl++;
907 break;
908 case AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK:
909 priv->reply_agg_tx_stats.last_sent_try++;
910 break;
911 case AGG_TX_STATE_LAST_SENT_BT_KILL_MSK:
912 priv->reply_agg_tx_stats.last_sent_bt_kill++;
913 break;
914 case AGG_TX_STATE_SCD_QUERY_MSK:
915 priv->reply_agg_tx_stats.scd_query++;
916 break;
917 case AGG_TX_STATE_TEST_BAD_CRC32_MSK:
918 priv->reply_agg_tx_stats.bad_crc32++;
919 break;
920 case AGG_TX_STATE_RESPONSE_MSK:
921 priv->reply_agg_tx_stats.response++;
922 break;
923 case AGG_TX_STATE_DUMP_TX_MSK:
924 priv->reply_agg_tx_stats.dump_tx++;
925 break;
926 case AGG_TX_STATE_DELAY_TX_MSK:
927 priv->reply_agg_tx_stats.delay_tx++;
928 break;
929 default:
930 priv->reply_agg_tx_stats.unknown++;
931 break;
932 }
933 }
934
935 static inline u32 iwlagn_get_scd_ssn(struct iwlagn_tx_resp *tx_resp)
936 {
937 return le32_to_cpup((__le32 *)&tx_resp->status +
938 tx_resp->frame_count) & IEEE80211_MAX_SN;
939 }
940
941 static void iwl_rx_reply_tx_agg(struct iwl_priv *priv,
942 struct iwlagn_tx_resp *tx_resp)
943 {
944 struct agg_tx_status *frame_status = &tx_resp->status;
945 int tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
946 IWLAGN_TX_RES_TID_POS;
947 int sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
948 IWLAGN_TX_RES_RA_POS;
949 struct iwl_ht_agg *agg = &priv->tid_data[sta_id][tid].agg;
950 u32 status = le16_to_cpu(tx_resp->status.status);
951 int i;
952
953 WARN_ON(tid == IWL_TID_NON_QOS);
954
955 if (agg->wait_for_ba)
956 IWL_DEBUG_TX_REPLY(priv,
957 "got tx response w/o block-ack\n");
958
959 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
960 agg->wait_for_ba = (tx_resp->frame_count > 1);
961
962 /*
963 * If the BT kill count is non-zero, we'll get this
964 * notification again.
965 */
966 if (tx_resp->bt_kill_count && tx_resp->frame_count == 1 &&
967 priv->lib->bt_params &&
968 priv->lib->bt_params->advanced_bt_coexist) {
969 IWL_DEBUG_COEX(priv, "receive reply tx w/ bt_kill\n");
970 }
971
972 if (tx_resp->frame_count == 1)
973 return;
974
975 IWL_DEBUG_TX_REPLY(priv, "TXQ %d initial_rate 0x%x ssn %d frm_cnt %d\n",
976 agg->txq_id,
977 le32_to_cpu(tx_resp->rate_n_flags),
978 iwlagn_get_scd_ssn(tx_resp), tx_resp->frame_count);
979
980 /* Construct bit-map of pending frames within Tx window */
981 for (i = 0; i < tx_resp->frame_count; i++) {
982 u16 fstatus = le16_to_cpu(frame_status[i].status);
983 u8 retry_cnt = (fstatus & AGG_TX_TRY_MSK) >> AGG_TX_TRY_POS;
984
985 if (status & AGG_TX_STATUS_MSK)
986 iwlagn_count_agg_tx_err_status(priv, fstatus);
987
988 if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
989 AGG_TX_STATE_ABORT_MSK))
990 continue;
991
992 if (status & AGG_TX_STATUS_MSK || retry_cnt > 1)
993 IWL_DEBUG_TX_REPLY(priv,
994 "%d: status %s (0x%04x), try-count (0x%01x)\n",
995 i,
996 iwl_get_agg_tx_fail_reason(fstatus),
997 fstatus & AGG_TX_STATUS_MSK,
998 retry_cnt);
999 }
1000 }
1001
1002 #ifdef CONFIG_IWLWIFI_DEBUG
1003 #define AGG_TX_STATE_FAIL(x) case AGG_TX_STATE_ ## x: return #x
1004
1005 const char *iwl_get_agg_tx_fail_reason(u16 status)
1006 {
1007 status &= AGG_TX_STATUS_MSK;
1008 switch (status) {
1009 case AGG_TX_STATE_TRANSMITTED:
1010 return "SUCCESS";
1011 AGG_TX_STATE_FAIL(UNDERRUN_MSK);
1012 AGG_TX_STATE_FAIL(BT_PRIO_MSK);
1013 AGG_TX_STATE_FAIL(FEW_BYTES_MSK);
1014 AGG_TX_STATE_FAIL(ABORT_MSK);
1015 AGG_TX_STATE_FAIL(LAST_SENT_TTL_MSK);
1016 AGG_TX_STATE_FAIL(LAST_SENT_TRY_CNT_MSK);
1017 AGG_TX_STATE_FAIL(LAST_SENT_BT_KILL_MSK);
1018 AGG_TX_STATE_FAIL(SCD_QUERY_MSK);
1019 AGG_TX_STATE_FAIL(TEST_BAD_CRC32_MSK);
1020 AGG_TX_STATE_FAIL(RESPONSE_MSK);
1021 AGG_TX_STATE_FAIL(DUMP_TX_MSK);
1022 AGG_TX_STATE_FAIL(DELAY_TX_MSK);
1023 }
1024
1025 return "UNKNOWN";
1026 }
1027 #endif /* CONFIG_IWLWIFI_DEBUG */
1028
1029 static void iwlagn_count_tx_err_status(struct iwl_priv *priv, u16 status)
1030 {
1031 status &= TX_STATUS_MSK;
1032
1033 switch (status) {
1034 case TX_STATUS_POSTPONE_DELAY:
1035 priv->reply_tx_stats.pp_delay++;
1036 break;
1037 case TX_STATUS_POSTPONE_FEW_BYTES:
1038 priv->reply_tx_stats.pp_few_bytes++;
1039 break;
1040 case TX_STATUS_POSTPONE_BT_PRIO:
1041 priv->reply_tx_stats.pp_bt_prio++;
1042 break;
1043 case TX_STATUS_POSTPONE_QUIET_PERIOD:
1044 priv->reply_tx_stats.pp_quiet_period++;
1045 break;
1046 case TX_STATUS_POSTPONE_CALC_TTAK:
1047 priv->reply_tx_stats.pp_calc_ttak++;
1048 break;
1049 case TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY:
1050 priv->reply_tx_stats.int_crossed_retry++;
1051 break;
1052 case TX_STATUS_FAIL_SHORT_LIMIT:
1053 priv->reply_tx_stats.short_limit++;
1054 break;
1055 case TX_STATUS_FAIL_LONG_LIMIT:
1056 priv->reply_tx_stats.long_limit++;
1057 break;
1058 case TX_STATUS_FAIL_FIFO_UNDERRUN:
1059 priv->reply_tx_stats.fifo_underrun++;
1060 break;
1061 case TX_STATUS_FAIL_DRAIN_FLOW:
1062 priv->reply_tx_stats.drain_flow++;
1063 break;
1064 case TX_STATUS_FAIL_RFKILL_FLUSH:
1065 priv->reply_tx_stats.rfkill_flush++;
1066 break;
1067 case TX_STATUS_FAIL_LIFE_EXPIRE:
1068 priv->reply_tx_stats.life_expire++;
1069 break;
1070 case TX_STATUS_FAIL_DEST_PS:
1071 priv->reply_tx_stats.dest_ps++;
1072 break;
1073 case TX_STATUS_FAIL_HOST_ABORTED:
1074 priv->reply_tx_stats.host_abort++;
1075 break;
1076 case TX_STATUS_FAIL_BT_RETRY:
1077 priv->reply_tx_stats.bt_retry++;
1078 break;
1079 case TX_STATUS_FAIL_STA_INVALID:
1080 priv->reply_tx_stats.sta_invalid++;
1081 break;
1082 case TX_STATUS_FAIL_FRAG_DROPPED:
1083 priv->reply_tx_stats.frag_drop++;
1084 break;
1085 case TX_STATUS_FAIL_TID_DISABLE:
1086 priv->reply_tx_stats.tid_disable++;
1087 break;
1088 case TX_STATUS_FAIL_FIFO_FLUSHED:
1089 priv->reply_tx_stats.fifo_flush++;
1090 break;
1091 case TX_STATUS_FAIL_INSUFFICIENT_CF_POLL:
1092 priv->reply_tx_stats.insuff_cf_poll++;
1093 break;
1094 case TX_STATUS_FAIL_PASSIVE_NO_RX:
1095 priv->reply_tx_stats.fail_hw_drop++;
1096 break;
1097 case TX_STATUS_FAIL_NO_BEACON_ON_RADAR:
1098 priv->reply_tx_stats.sta_color_mismatch++;
1099 break;
1100 default:
1101 priv->reply_tx_stats.unknown++;
1102 break;
1103 }
1104 }
1105
1106 static void iwlagn_set_tx_status(struct iwl_priv *priv,
1107 struct ieee80211_tx_info *info,
1108 struct iwlagn_tx_resp *tx_resp)
1109 {
1110 u16 status = le16_to_cpu(tx_resp->status.status);
1111
1112 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1113
1114 info->status.rates[0].count = tx_resp->failure_frame + 1;
1115 info->flags |= iwl_tx_status_to_mac80211(status);
1116 iwlagn_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
1117 info);
1118 if (!iwl_is_tx_success(status))
1119 iwlagn_count_tx_err_status(priv, status);
1120 }
1121
1122 static void iwl_check_abort_status(struct iwl_priv *priv,
1123 u8 frame_count, u32 status)
1124 {
1125 if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) {
1126 IWL_ERR(priv, "Tx flush command to flush out all frames\n");
1127 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
1128 queue_work(priv->workqueue, &priv->tx_flush);
1129 }
1130 }
1131
1132 void iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb)
1133 {
1134 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1135 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1136 int txq_id = SEQ_TO_QUEUE(sequence);
1137 int cmd_index __maybe_unused = SEQ_TO_INDEX(sequence);
1138 struct iwlagn_tx_resp *tx_resp = (void *)pkt->data;
1139 struct ieee80211_hdr *hdr;
1140 u32 status = le16_to_cpu(tx_resp->status.status);
1141 u16 ssn = iwlagn_get_scd_ssn(tx_resp);
1142 int tid;
1143 int sta_id;
1144 int freed;
1145 struct ieee80211_tx_info *info;
1146 struct sk_buff_head skbs;
1147 struct sk_buff *skb;
1148 struct iwl_rxon_context *ctx;
1149 bool is_agg = (txq_id >= IWLAGN_FIRST_AMPDU_QUEUE);
1150
1151 tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
1152 IWLAGN_TX_RES_TID_POS;
1153 sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
1154 IWLAGN_TX_RES_RA_POS;
1155
1156 spin_lock_bh(&priv->sta_lock);
1157
1158 if (is_agg) {
1159 WARN_ON_ONCE(sta_id >= IWLAGN_STATION_COUNT ||
1160 tid >= IWL_MAX_TID_COUNT);
1161 if (txq_id != priv->tid_data[sta_id][tid].agg.txq_id)
1162 IWL_ERR(priv, "txq_id mismatch: %d %d\n", txq_id,
1163 priv->tid_data[sta_id][tid].agg.txq_id);
1164 iwl_rx_reply_tx_agg(priv, tx_resp);
1165 }
1166
1167 __skb_queue_head_init(&skbs);
1168
1169 if (tx_resp->frame_count == 1) {
1170 u16 next_reclaimed = le16_to_cpu(tx_resp->seq_ctl);
1171 next_reclaimed = IEEE80211_SEQ_TO_SN(next_reclaimed + 0x10);
1172
1173 if (is_agg) {
1174 /* If this is an aggregation queue, we can rely on the
1175 * ssn since the wifi sequence number corresponds to
1176 * the index in the TFD ring (%256).
1177 * The seq_ctl is the sequence control of the packet
1178 * to which this Tx response relates. But if there is a
1179 * hole in the bitmap of the BA we received, this Tx
1180 * response may allow to reclaim the hole and all the
1181 * subsequent packets that were already acked.
1182 * In that case, seq_ctl != ssn, and the next packet
1183 * to be reclaimed will be ssn and not seq_ctl.
1184 */
1185 next_reclaimed = ssn;
1186 }
1187
1188 if (tid != IWL_TID_NON_QOS) {
1189 priv->tid_data[sta_id][tid].next_reclaimed =
1190 next_reclaimed;
1191 IWL_DEBUG_TX_REPLY(priv, "Next reclaimed packet:%d\n",
1192 next_reclaimed);
1193 }
1194
1195 iwl_trans_reclaim(priv->trans, txq_id, ssn, &skbs);
1196
1197 iwlagn_check_ratid_empty(priv, sta_id, tid);
1198 freed = 0;
1199
1200 /* process frames */
1201 skb_queue_walk(&skbs, skb) {
1202 hdr = (struct ieee80211_hdr *)skb->data;
1203
1204 if (!ieee80211_is_data_qos(hdr->frame_control))
1205 priv->last_seq_ctl = tx_resp->seq_ctl;
1206
1207 info = IEEE80211_SKB_CB(skb);
1208 ctx = info->driver_data[0];
1209 iwl_trans_free_tx_cmd(priv->trans,
1210 info->driver_data[1]);
1211
1212 memset(&info->status, 0, sizeof(info->status));
1213
1214 if (status == TX_STATUS_FAIL_PASSIVE_NO_RX &&
1215 ctx->vif &&
1216 ctx->vif->type == NL80211_IFTYPE_STATION) {
1217 /* block and stop all queues */
1218 priv->passive_no_rx = true;
1219 IWL_DEBUG_TX_QUEUES(priv,
1220 "stop all queues: passive channel\n");
1221 ieee80211_stop_queues(priv->hw);
1222
1223 IWL_DEBUG_TX_REPLY(priv,
1224 "TXQ %d status %s (0x%08x) "
1225 "rate_n_flags 0x%x retries %d\n",
1226 txq_id,
1227 iwl_get_tx_fail_reason(status),
1228 status,
1229 le32_to_cpu(tx_resp->rate_n_flags),
1230 tx_resp->failure_frame);
1231
1232 IWL_DEBUG_TX_REPLY(priv,
1233 "FrameCnt = %d, idx=%d\n",
1234 tx_resp->frame_count, cmd_index);
1235 }
1236
1237 /* check if BAR is needed */
1238 if (is_agg && !iwl_is_tx_success(status))
1239 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1240 iwlagn_set_tx_status(priv, IEEE80211_SKB_CB(skb),
1241 tx_resp);
1242 if (!is_agg)
1243 iwlagn_non_agg_tx_status(priv, ctx, hdr->addr1);
1244
1245 freed++;
1246 }
1247
1248 if (tid != IWL_TID_NON_QOS) {
1249 priv->tid_data[sta_id][tid].next_reclaimed =
1250 next_reclaimed;
1251 IWL_DEBUG_TX_REPLY(priv, "Next reclaimed packet:%d\n",
1252 next_reclaimed);
1253 }
1254
1255 if (!is_agg && freed != 1)
1256 IWL_ERR(priv, "Q: %d, freed %d\n", txq_id, freed);
1257
1258 IWL_DEBUG_TX_REPLY(priv, "TXQ %d status %s (0x%08x)\n", txq_id,
1259 iwl_get_tx_fail_reason(status), status);
1260
1261 IWL_DEBUG_TX_REPLY(priv,
1262 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d seq_ctl=0x%x\n",
1263 le32_to_cpu(tx_resp->rate_n_flags),
1264 tx_resp->failure_frame,
1265 SEQ_TO_INDEX(sequence), ssn,
1266 le16_to_cpu(tx_resp->seq_ctl));
1267 }
1268
1269 iwl_check_abort_status(priv, tx_resp->frame_count, status);
1270 spin_unlock_bh(&priv->sta_lock);
1271
1272 while (!skb_queue_empty(&skbs)) {
1273 skb = __skb_dequeue(&skbs);
1274 ieee80211_tx_status(priv->hw, skb);
1275 }
1276 }
1277
1278 /**
1279 * iwlagn_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
1280 *
1281 * Handles block-acknowledge notification from device, which reports success
1282 * of frames sent via aggregation.
1283 */
1284 void iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv,
1285 struct iwl_rx_cmd_buffer *rxb)
1286 {
1287 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1288 struct iwl_compressed_ba_resp *ba_resp = (void *)pkt->data;
1289 struct iwl_ht_agg *agg;
1290 struct sk_buff_head reclaimed_skbs;
1291 struct sk_buff *skb;
1292 int sta_id;
1293 int tid;
1294 int freed;
1295
1296 /* "flow" corresponds to Tx queue */
1297 u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
1298
1299 /* "ssn" is start of block-ack Tx window, corresponds to index
1300 * (in Tx queue's circular buffer) of first TFD/frame in window */
1301 u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
1302
1303 if (scd_flow >= priv->cfg->base_params->num_of_queues) {
1304 IWL_ERR(priv,
1305 "BUG_ON scd_flow is bigger than number of queues\n");
1306 return;
1307 }
1308
1309 sta_id = ba_resp->sta_id;
1310 tid = ba_resp->tid;
1311 agg = &priv->tid_data[sta_id][tid].agg;
1312
1313 spin_lock_bh(&priv->sta_lock);
1314
1315 if (unlikely(!agg->wait_for_ba)) {
1316 if (unlikely(ba_resp->bitmap))
1317 IWL_ERR(priv, "Received BA when not expected\n");
1318 spin_unlock_bh(&priv->sta_lock);
1319 return;
1320 }
1321
1322 if (unlikely(scd_flow != agg->txq_id)) {
1323 /*
1324 * FIXME: this is a uCode bug which need to be addressed,
1325 * log the information and return for now.
1326 * Since it is can possibly happen very often and in order
1327 * not to fill the syslog, don't use IWL_ERR or IWL_WARN
1328 */
1329 IWL_DEBUG_TX_QUEUES(priv,
1330 "Bad queue mapping txq_id=%d, agg_txq[sta:%d,tid:%d]=%d\n",
1331 scd_flow, sta_id, tid, agg->txq_id);
1332 spin_unlock_bh(&priv->sta_lock);
1333 return;
1334 }
1335
1336 __skb_queue_head_init(&reclaimed_skbs);
1337
1338 /* Release all TFDs before the SSN, i.e. all TFDs in front of
1339 * block-ack window (we assume that they've been successfully
1340 * transmitted ... if not, it's too late anyway). */
1341 iwl_trans_reclaim(priv->trans, scd_flow, ba_resp_scd_ssn,
1342 &reclaimed_skbs);
1343
1344 IWL_DEBUG_TX_REPLY(priv, "REPLY_COMPRESSED_BA [%d] Received from %pM, "
1345 "sta_id = %d\n",
1346 agg->wait_for_ba,
1347 (u8 *) &ba_resp->sta_addr_lo32,
1348 ba_resp->sta_id);
1349 IWL_DEBUG_TX_REPLY(priv, "TID = %d, SeqCtl = %d, bitmap = 0x%llx, "
1350 "scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
1351 ba_resp->tid, le16_to_cpu(ba_resp->seq_ctl),
1352 (unsigned long long)le64_to_cpu(ba_resp->bitmap),
1353 scd_flow, ba_resp_scd_ssn, ba_resp->txed,
1354 ba_resp->txed_2_done);
1355
1356 /* Mark that the expected block-ack response arrived */
1357 agg->wait_for_ba = false;
1358
1359 /* Sanity check values reported by uCode */
1360 if (ba_resp->txed_2_done > ba_resp->txed) {
1361 IWL_DEBUG_TX_REPLY(priv,
1362 "bogus sent(%d) and ack(%d) count\n",
1363 ba_resp->txed, ba_resp->txed_2_done);
1364 /*
1365 * set txed_2_done = txed,
1366 * so it won't impact rate scale
1367 */
1368 ba_resp->txed = ba_resp->txed_2_done;
1369 }
1370
1371 priv->tid_data[sta_id][tid].next_reclaimed = ba_resp_scd_ssn;
1372
1373 iwlagn_check_ratid_empty(priv, sta_id, tid);
1374 freed = 0;
1375
1376 skb_queue_walk(&reclaimed_skbs, skb) {
1377 struct ieee80211_hdr *hdr = (void *)skb->data;
1378 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1379
1380 if (ieee80211_is_data_qos(hdr->frame_control))
1381 freed++;
1382 else
1383 WARN_ON_ONCE(1);
1384
1385 iwl_trans_free_tx_cmd(priv->trans, info->driver_data[1]);
1386
1387 memset(&info->status, 0, sizeof(info->status));
1388 /* Packet was transmitted successfully, failures come as single
1389 * frames because before failing a frame the firmware transmits
1390 * it without aggregation at least once.
1391 */
1392 info->flags |= IEEE80211_TX_STAT_ACK;
1393
1394 if (freed == 1) {
1395 /* this is the first skb we deliver in this batch */
1396 /* put the rate scaling data there */
1397 info = IEEE80211_SKB_CB(skb);
1398 memset(&info->status, 0, sizeof(info->status));
1399 info->flags |= IEEE80211_TX_STAT_AMPDU;
1400 info->status.ampdu_ack_len = ba_resp->txed_2_done;
1401 info->status.ampdu_len = ba_resp->txed;
1402 iwlagn_hwrate_to_tx_control(priv, agg->rate_n_flags,
1403 info);
1404 }
1405 }
1406
1407 spin_unlock_bh(&priv->sta_lock);
1408
1409 while (!skb_queue_empty(&reclaimed_skbs)) {
1410 skb = __skb_dequeue(&reclaimed_skbs);
1411 ieee80211_tx_status(priv->hw, skb);
1412 }
1413 }
Linux with added FPC-III support