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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-io.h"
38#include "iwl-agn-hw.h"
39#include "iwl-agn.h"
40#include "iwl-trans.h"
41
42static const u8 tid_to_ac[] = {
43 IEEE80211_AC_BE,
44 IEEE80211_AC_BK,
45 IEEE80211_AC_BK,
46 IEEE80211_AC_BE,
47 IEEE80211_AC_VI,
48 IEEE80211_AC_VI,
49 IEEE80211_AC_VO,
50 IEEE80211_AC_VO,
51};
52
53static void iwlagn_tx_cmd_protection(struct iwl_priv *priv,
54 struct ieee80211_tx_info *info,
55 __le16 fc, __le32 *tx_flags)
56{
57 if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS ||
58 info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT ||
59 info->flags & IEEE80211_TX_CTL_AMPDU)
60 *tx_flags |= TX_CMD_FLG_PROT_REQUIRE_MSK;
61}
62
63/*
64 * handle build REPLY_TX command notification.
65 */
66static void iwlagn_tx_cmd_build_basic(struct iwl_priv *priv,
67 struct sk_buff *skb,
68 struct iwl_tx_cmd *tx_cmd,
69 struct ieee80211_tx_info *info,
70 struct ieee80211_hdr *hdr, u8 sta_id)
71{
72 __le16 fc = hdr->frame_control;
73 __le32 tx_flags = tx_cmd->tx_flags;
74
75 tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
76
77 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
78 tx_flags |= TX_CMD_FLG_ACK_MSK;
79 else
80 tx_flags &= ~TX_CMD_FLG_ACK_MSK;
81
82 if (ieee80211_is_probe_resp(fc))
83 tx_flags |= TX_CMD_FLG_TSF_MSK;
84 else if (ieee80211_is_back_req(fc))
85 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK;
86 else if (info->band == IEEE80211_BAND_2GHZ &&
87 priv->cfg->bt_params &&
88 priv->cfg->bt_params->advanced_bt_coexist &&
89 (ieee80211_is_auth(fc) || ieee80211_is_assoc_req(fc) ||
90 ieee80211_is_reassoc_req(fc) ||
91 skb->protocol == cpu_to_be16(ETH_P_PAE)))
92 tx_flags |= TX_CMD_FLG_IGNORE_BT;
93
94
95 tx_cmd->sta_id = sta_id;
96 if (ieee80211_has_morefrags(fc))
97 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
98
99 if (ieee80211_is_data_qos(fc)) {
100 u8 *qc = ieee80211_get_qos_ctl(hdr);
101 tx_cmd->tid_tspec = qc[0] & 0xf;
102 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
103 } else {
104 tx_cmd->tid_tspec = IWL_TID_NON_QOS;
105 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
106 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
107 else
108 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
109 }
110
111 iwlagn_tx_cmd_protection(priv, info, fc, &tx_flags);
112
113 tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
114 if (ieee80211_is_mgmt(fc)) {
115 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
116 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
117 else
118 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
119 } else {
120 tx_cmd->timeout.pm_frame_timeout = 0;
121 }
122
123 tx_cmd->driver_txop = 0;
124 tx_cmd->tx_flags = tx_flags;
125 tx_cmd->next_frame_len = 0;
126}
127
128static void iwlagn_tx_cmd_build_rate(struct iwl_priv *priv,
129 struct iwl_tx_cmd *tx_cmd,
130 struct ieee80211_tx_info *info,
131 __le16 fc)
132{
133 u32 rate_flags;
134 int rate_idx;
135 u8 rts_retry_limit;
136 u8 data_retry_limit;
137 u8 rate_plcp;
138
139 if (priv->wowlan) {
140 rts_retry_limit = IWLAGN_LOW_RETRY_LIMIT;
141 data_retry_limit = IWLAGN_LOW_RETRY_LIMIT;
142 } else {
143 /* Set retry limit on RTS packets */
144 rts_retry_limit = IWLAGN_RTS_DFAULT_RETRY_LIMIT;
145
146 /* Set retry limit on DATA packets and Probe Responses*/
147 if (ieee80211_is_probe_resp(fc)) {
148 data_retry_limit = IWLAGN_MGMT_DFAULT_RETRY_LIMIT;
149 rts_retry_limit =
150 min(data_retry_limit, rts_retry_limit);
151 } else if (ieee80211_is_back_req(fc))
152 data_retry_limit = IWLAGN_BAR_DFAULT_RETRY_LIMIT;
153 else
154 data_retry_limit = IWLAGN_DEFAULT_TX_RETRY;
155 }
156
157 tx_cmd->data_retry_limit = data_retry_limit;
158 tx_cmd->rts_retry_limit = rts_retry_limit;
159
160 /* DATA packets will use the uCode station table for rate/antenna
161 * selection */
162 if (ieee80211_is_data(fc)) {
163 tx_cmd->initial_rate_index = 0;
164 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
165#ifdef CONFIG_IWLWIFI_DEVICE_TESTMODE
166 if (priv->tm_fixed_rate) {
167 /*
168 * rate overwrite by testmode
169 * we not only send lq command to change rate
170 * we also re-enforce per data pkt base.
171 */
172 tx_cmd->tx_flags &= ~TX_CMD_FLG_STA_RATE_MSK;
173 memcpy(&tx_cmd->rate_n_flags, &priv->tm_fixed_rate,
174 sizeof(tx_cmd->rate_n_flags));
175 }
176#endif
177 return;
178 } else if (ieee80211_is_back_req(fc))
179 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
180
181 /**
182 * If the current TX rate stored in mac80211 has the MCS bit set, it's
183 * not really a TX rate. Thus, we use the lowest supported rate for
184 * this band. Also use the lowest supported rate if the stored rate
185 * index is invalid.
186 */
187 rate_idx = info->control.rates[0].idx;
188 if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS ||
189 (rate_idx < 0) || (rate_idx > IWL_RATE_COUNT_LEGACY))
190 rate_idx = rate_lowest_index(&priv->bands[info->band],
191 info->control.sta);
192 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
193 if (info->band == IEEE80211_BAND_5GHZ)
194 rate_idx += IWL_FIRST_OFDM_RATE;
195 /* Get PLCP rate for tx_cmd->rate_n_flags */
196 rate_plcp = iwl_rates[rate_idx].plcp;
197 /* Zero out flags for this packet */
198 rate_flags = 0;
199
200 /* Set CCK flag as needed */
201 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
202 rate_flags |= RATE_MCS_CCK_MSK;
203
204 /* Set up antennas */
205 if (priv->cfg->bt_params &&
206 priv->cfg->bt_params->advanced_bt_coexist &&
207 priv->bt_full_concurrent) {
208 /* operated as 1x1 in full concurrency mode */
209 priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
210 first_antenna(priv->hw_params.valid_tx_ant));
211 } else
212 priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
213 priv->hw_params.valid_tx_ant);
214 rate_flags |= iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
215
216 /* Set the rate in the TX cmd */
217 tx_cmd->rate_n_flags = iwl_hw_set_rate_n_flags(rate_plcp, rate_flags);
218}
219
220static void iwlagn_tx_cmd_build_hwcrypto(struct iwl_priv *priv,
221 struct ieee80211_tx_info *info,
222 struct iwl_tx_cmd *tx_cmd,
223 struct sk_buff *skb_frag)
224{
225 struct ieee80211_key_conf *keyconf = info->control.hw_key;
226
227 switch (keyconf->cipher) {
228 case WLAN_CIPHER_SUITE_CCMP:
229 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
230 memcpy(tx_cmd->key, keyconf->key, keyconf->keylen);
231 if (info->flags & IEEE80211_TX_CTL_AMPDU)
232 tx_cmd->tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
233 IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n");
234 break;
235
236 case WLAN_CIPHER_SUITE_TKIP:
237 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
238 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
239 IWL_DEBUG_TX(priv, "tx_cmd with tkip hwcrypto\n");
240 break;
241
242 case WLAN_CIPHER_SUITE_WEP104:
243 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
244 /* fall through */
245 case WLAN_CIPHER_SUITE_WEP40:
246 tx_cmd->sec_ctl |= (TX_CMD_SEC_WEP |
247 (keyconf->keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT);
248
249 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
250
251 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
252 "with key %d\n", keyconf->keyidx);
253 break;
254
255 default:
256 IWL_ERR(priv, "Unknown encode cipher %x\n", keyconf->cipher);
257 break;
258 }
259}
260
261/**
262 * iwl_sta_id_or_broadcast - return sta_id or broadcast sta
263 * @context: the current context
264 * @sta: mac80211 station
265 *
266 * In certain circumstances mac80211 passes a station pointer
267 * that may be %NULL, for example during TX or key setup. In
268 * that case, we need to use the broadcast station, so this
269 * inline wraps that pattern.
270 */
271static int iwl_sta_id_or_broadcast(struct iwl_rxon_context *context,
272 struct ieee80211_sta *sta)
273{
274 int sta_id;
275
276 if (!sta)
277 return context->bcast_sta_id;
278
279 sta_id = iwl_sta_id(sta);
280
281 /*
282 * mac80211 should not be passing a partially
283 * initialised station!
284 */
285 WARN_ON(sta_id == IWL_INVALID_STATION);
286
287 return sta_id;
288}
289
290/*
291 * start REPLY_TX command process
292 */
293int iwlagn_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
294{
295 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
296 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
297 struct iwl_station_priv *sta_priv = NULL;
298 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
299 struct iwl_device_cmd *dev_cmd = NULL;
300 struct iwl_tx_cmd *tx_cmd;
301 __le16 fc;
302 u8 hdr_len;
303 u16 len, seq_number = 0;
304 u8 sta_id, tid = IWL_MAX_TID_COUNT;
305 bool is_agg = false;
306 int txq_id;
307
308 if (info->control.vif)
309 ctx = iwl_rxon_ctx_from_vif(info->control.vif);
310
311 if (iwl_is_rfkill(priv)) {
312 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
313 goto drop_unlock_priv;
314 }
315
316 fc = hdr->frame_control;
317
318#ifdef CONFIG_IWLWIFI_DEBUG
319 if (ieee80211_is_auth(fc))
320 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
321 else if (ieee80211_is_assoc_req(fc))
322 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
323 else if (ieee80211_is_reassoc_req(fc))
324 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
325#endif
326
327 if (unlikely(ieee80211_is_probe_resp(fc))) {
328 struct iwl_wipan_noa_data *noa_data =
329 rcu_dereference(priv->noa_data);
330
331 if (noa_data &&
332 pskb_expand_head(skb, 0, noa_data->length,
333 GFP_ATOMIC) == 0) {
334 memcpy(skb_put(skb, noa_data->length),
335 noa_data->data, noa_data->length);
336 hdr = (struct ieee80211_hdr *)skb->data;
337 }
338 }
339
340 hdr_len = ieee80211_hdrlen(fc);
341
342 /* For management frames use broadcast id to do not break aggregation */
343 if (!ieee80211_is_data(fc))
344 sta_id = ctx->bcast_sta_id;
345 else {
346 /* Find index into station table for destination station */
347 sta_id = iwl_sta_id_or_broadcast(ctx, info->control.sta);
348 if (sta_id == IWL_INVALID_STATION) {
349 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
350 hdr->addr1);
351 goto drop_unlock_priv;
352 }
353 }
354
355 IWL_DEBUG_TX(priv, "station Id %d\n", sta_id);
356
357 if (info->control.sta)
358 sta_priv = (void *)info->control.sta->drv_priv;
359
360 if (sta_priv && sta_priv->asleep &&
361 (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER)) {
362 /*
363 * This sends an asynchronous command to the device,
364 * but we can rely on it being processed before the
365 * next frame is processed -- and the next frame to
366 * this station is the one that will consume this
367 * counter.
368 * For now set the counter to just 1 since we do not
369 * support uAPSD yet.
370 *
371 * FIXME: If we get two non-bufferable frames one
372 * after the other, we might only send out one of
373 * them because this is racy.
374 */
375 iwl_sta_modify_sleep_tx_count(priv, sta_id, 1);
376 }
377
378 if (info->flags & IEEE80211_TX_CTL_AMPDU)
379 is_agg = true;
380
381 dev_cmd = kmem_cache_alloc(iwl_tx_cmd_pool, GFP_ATOMIC);
382
383 if (unlikely(!dev_cmd))
384 goto drop_unlock_priv;
385
386 memset(dev_cmd, 0, sizeof(*dev_cmd));
387 tx_cmd = (struct iwl_tx_cmd *) dev_cmd->payload;
388
389 /* Total # bytes to be transmitted */
390 len = (u16)skb->len;
391 tx_cmd->len = cpu_to_le16(len);
392
393 if (info->control.hw_key)
394 iwlagn_tx_cmd_build_hwcrypto(priv, info, tx_cmd, skb);
395
396 /* TODO need this for burst mode later on */
397 iwlagn_tx_cmd_build_basic(priv, skb, tx_cmd, info, hdr, sta_id);
398
399 iwlagn_tx_cmd_build_rate(priv, tx_cmd, info, fc);
400
401 memset(&info->status, 0, sizeof(info->status));
402
403 info->driver_data[0] = ctx;
404 info->driver_data[1] = dev_cmd;
405
406 spin_lock(&priv->sta_lock);
407
408 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
409 u8 *qc = NULL;
410 struct iwl_tid_data *tid_data;
411 qc = ieee80211_get_qos_ctl(hdr);
412 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
413 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
414 goto drop_unlock_sta;
415 tid_data = &priv->tid_data[sta_id][tid];
416
417 /* aggregation is on for this <sta,tid> */
418 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
419 tid_data->agg.state != IWL_AGG_ON) {
420 IWL_ERR(priv, "TX_CTL_AMPDU while not in AGG:"
421 " Tx flags = 0x%08x, agg.state = %d",
422 info->flags, tid_data->agg.state);
423 IWL_ERR(priv, "sta_id = %d, tid = %d seq_num = %d",
424 sta_id, tid, SEQ_TO_SN(tid_data->seq_number));
425 goto drop_unlock_sta;
426 }
427
428 /* We can receive packets from the stack in IWL_AGG_{ON,OFF}
429 * only. Check this here.
430 */
431 if (WARN_ONCE(tid_data->agg.state != IWL_AGG_ON &&
432 tid_data->agg.state != IWL_AGG_OFF,
433 "Tx while agg.state = %d", tid_data->agg.state))
434 goto drop_unlock_sta;
435
436 seq_number = tid_data->seq_number;
437 seq_number &= IEEE80211_SCTL_SEQ;
438 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
439 hdr->seq_ctrl |= cpu_to_le16(seq_number);
440 seq_number += 0x10;
441 }
442
443 /* Copy MAC header from skb into command buffer */
444 memcpy(tx_cmd->hdr, hdr, hdr_len);
445
446 if (is_agg)
447 txq_id = priv->tid_data[sta_id][tid].agg.txq_id;
448 else if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) {
449 /*
450 * Send this frame after DTIM -- there's a special queue
451 * reserved for this for contexts that support AP mode.
452 */
453 txq_id = ctx->mcast_queue;
454
455 /*
456 * The microcode will clear the more data
457 * bit in the last frame it transmits.
458 */
459 hdr->frame_control |=
460 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
461 } else if (info->flags & IEEE80211_TX_CTL_TX_OFFCHAN)
462 txq_id = IWL_AUX_QUEUE;
463 else
464 txq_id = ctx->ac_to_queue[skb_get_queue_mapping(skb)];
465
466 WARN_ON_ONCE(!is_agg && txq_id != info->hw_queue);
467 WARN_ON_ONCE(is_agg &&
468 priv->queue_to_mac80211[txq_id] != info->hw_queue);
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
491drop_unlock_sta:
492 if (dev_cmd)
493 kmem_cache_free(iwl_tx_cmd_pool, dev_cmd);
494 spin_unlock(&priv->sta_lock);
495drop_unlock_priv:
496 return -1;
497}
498
499static int iwlagn_alloc_agg_txq(struct iwl_priv *priv, int mq)
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_mac80211[q] = mq;
507 return q;
508 }
509 }
510
511 return -ENOSPC;
512}
513
514static void iwlagn_dealloc_agg_txq(struct iwl_priv *priv, int q)
515{
516 clear_bit(q, priv->agg_q_alloc);
517 priv->queue_to_mac80211[q] = IWL_INVALID_MAC80211_QUEUE;
518}
519
520int 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);
586turn_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 /*
594 * If the transport didn't know that we wanted to start
595 * agreggation, don't tell it that we want to stop them.
596 * This can happen when we don't get the addBA response on
597 * time, or we hadn't time to drain the AC queues.
598 */
599 if (agg_state == IWL_AGG_ON)
600 iwl_trans_tx_agg_disable(priv->trans, txq_id);
601 else
602 IWL_DEBUG_TX_QUEUES(priv, "Don't disable tx agg: %d\n",
603 agg_state);
604 iwlagn_dealloc_agg_txq(priv, txq_id);
605 }
606
607 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
608
609 return 0;
610}
611
612int iwlagn_tx_agg_start(struct iwl_priv *priv, struct ieee80211_vif *vif,
613 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
614{
615 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
616 struct iwl_tid_data *tid_data;
617 int sta_id, txq_id, ret;
618
619 IWL_DEBUG_HT(priv, "TX AGG request on ra = %pM tid = %d\n",
620 sta->addr, tid);
621
622 sta_id = iwl_sta_id(sta);
623 if (sta_id == IWL_INVALID_STATION) {
624 IWL_ERR(priv, "Start AGG on invalid station\n");
625 return -ENXIO;
626 }
627 if (unlikely(tid >= IWL_MAX_TID_COUNT))
628 return -EINVAL;
629
630 if (priv->tid_data[sta_id][tid].agg.state != IWL_AGG_OFF) {
631 IWL_ERR(priv, "Start AGG when state is not IWL_AGG_OFF !\n");
632 return -ENXIO;
633 }
634
635 txq_id = iwlagn_alloc_agg_txq(priv, ctx->ac_to_queue[tid_to_ac[tid]]);
636 if (txq_id < 0) {
637 IWL_DEBUG_TX_QUEUES(priv,
638 "No free aggregation queue for %pM/%d\n",
639 sta->addr, tid);
640 return txq_id;
641 }
642
643 ret = iwl_sta_tx_modify_enable_tid(priv, sta_id, tid);
644 if (ret)
645 return ret;
646
647 spin_lock_bh(&priv->sta_lock);
648 tid_data = &priv->tid_data[sta_id][tid];
649 tid_data->agg.ssn = SEQ_TO_SN(tid_data->seq_number);
650 tid_data->agg.txq_id = txq_id;
651
652 *ssn = tid_data->agg.ssn;
653
654 if (*ssn == tid_data->next_reclaimed) {
655 IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d\n",
656 tid_data->agg.ssn);
657 tid_data->agg.state = IWL_AGG_STARTING;
658 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
659 } else {
660 IWL_DEBUG_TX_QUEUES(priv, "Can't proceed: ssn %d, "
661 "next_reclaimed = %d\n",
662 tid_data->agg.ssn,
663 tid_data->next_reclaimed);
664 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA;
665 }
666 spin_unlock_bh(&priv->sta_lock);
667
668 return ret;
669}
670
671int iwlagn_tx_agg_oper(struct iwl_priv *priv, struct ieee80211_vif *vif,
672 struct ieee80211_sta *sta, u16 tid, u8 buf_size)
673{
674 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
675 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
676 int q, fifo;
677 u16 ssn;
678
679 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
680
681 spin_lock_bh(&priv->sta_lock);
682 ssn = priv->tid_data[sta_priv->sta_id][tid].agg.ssn;
683 q = priv->tid_data[sta_priv->sta_id][tid].agg.txq_id;
684 priv->tid_data[sta_priv->sta_id][tid].agg.state = IWL_AGG_ON;
685 spin_unlock_bh(&priv->sta_lock);
686
687 fifo = ctx->ac_to_fifo[tid_to_ac[tid]];
688
689 iwl_trans_tx_agg_setup(priv->trans, q, fifo,
690 sta_priv->sta_id, tid,
691 buf_size, ssn);
692
693 /*
694 * If the limit is 0, then it wasn't initialised yet,
695 * use the default. We can do that since we take the
696 * minimum below, and we don't want to go above our
697 * default due to hardware restrictions.
698 */
699 if (sta_priv->max_agg_bufsize == 0)
700 sta_priv->max_agg_bufsize =
701 LINK_QUAL_AGG_FRAME_LIMIT_DEF;
702
703 /*
704 * Even though in theory the peer could have different
705 * aggregation reorder buffer sizes for different sessions,
706 * our ucode doesn't allow for that and has a global limit
707 * for each station. Therefore, use the minimum of all the
708 * aggregation sessions and our default value.
709 */
710 sta_priv->max_agg_bufsize =
711 min(sta_priv->max_agg_bufsize, buf_size);
712
713 if (priv->hw_params.use_rts_for_aggregation) {
714 /*
715 * switch to RTS/CTS if it is the prefer protection
716 * method for HT traffic
717 */
718
719 sta_priv->lq_sta.lq.general_params.flags |=
720 LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
721 }
722 priv->agg_tids_count++;
723 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
724 priv->agg_tids_count);
725
726 sta_priv->lq_sta.lq.agg_params.agg_frame_cnt_limit =
727 sta_priv->max_agg_bufsize;
728
729 IWL_DEBUG_HT(priv, "Tx aggregation enabled on ra = %pM tid = %d\n",
730 sta->addr, tid);
731
732 return iwl_send_lq_cmd(priv, ctx,
733 &sta_priv->lq_sta.lq, CMD_ASYNC, false);
734}
735
736static void iwlagn_check_ratid_empty(struct iwl_priv *priv, int sta_id, u8 tid)
737{
738 struct iwl_tid_data *tid_data = &priv->tid_data[sta_id][tid];
739 enum iwl_rxon_context_id ctx;
740 struct ieee80211_vif *vif;
741 u8 *addr;
742
743 lockdep_assert_held(&priv->sta_lock);
744
745 addr = priv->stations[sta_id].sta.sta.addr;
746 ctx = priv->stations[sta_id].ctxid;
747 vif = priv->contexts[ctx].vif;
748
749 switch (priv->tid_data[sta_id][tid].agg.state) {
750 case IWL_EMPTYING_HW_QUEUE_DELBA:
751 /* There are no packets for this RA / TID in the HW any more */
752 if (tid_data->agg.ssn == tid_data->next_reclaimed) {
753 IWL_DEBUG_TX_QUEUES(priv,
754 "Can continue DELBA flow ssn = next_recl ="
755 " %d", tid_data->next_reclaimed);
756 iwl_trans_tx_agg_disable(priv->trans,
757 tid_data->agg.txq_id);
758 iwlagn_dealloc_agg_txq(priv, tid_data->agg.txq_id);
759 tid_data->agg.state = IWL_AGG_OFF;
760 ieee80211_stop_tx_ba_cb_irqsafe(vif, addr, tid);
761 }
762 break;
763 case IWL_EMPTYING_HW_QUEUE_ADDBA:
764 /* There are no packets for this RA / TID in the HW any more */
765 if (tid_data->agg.ssn == tid_data->next_reclaimed) {
766 IWL_DEBUG_TX_QUEUES(priv,
767 "Can continue ADDBA flow ssn = next_recl ="
768 " %d", tid_data->next_reclaimed);
769 tid_data->agg.state = IWL_AGG_STARTING;
770 ieee80211_start_tx_ba_cb_irqsafe(vif, addr, tid);
771 }
772 break;
773 default:
774 break;
775 }
776}
777
778static void iwlagn_non_agg_tx_status(struct iwl_priv *priv,
779 struct iwl_rxon_context *ctx,
780 const u8 *addr1)
781{
782 struct ieee80211_sta *sta;
783 struct iwl_station_priv *sta_priv;
784
785 rcu_read_lock();
786 sta = ieee80211_find_sta(ctx->vif, addr1);
787 if (sta) {
788 sta_priv = (void *)sta->drv_priv;
789 /* avoid atomic ops if this isn't a client */
790 if (sta_priv->client &&
791 atomic_dec_return(&sta_priv->pending_frames) == 0)
792 ieee80211_sta_block_awake(priv->hw, sta, false);
793 }
794 rcu_read_unlock();
795}
796
797/**
798 * translate ucode response to mac80211 tx status control values
799 */
800static void iwlagn_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
801 struct ieee80211_tx_info *info)
802{
803 struct ieee80211_tx_rate *r = &info->status.rates[0];
804
805 info->status.antenna =
806 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
807 if (rate_n_flags & RATE_MCS_HT_MSK)
808 r->flags |= IEEE80211_TX_RC_MCS;
809 if (rate_n_flags & RATE_MCS_GF_MSK)
810 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
811 if (rate_n_flags & RATE_MCS_HT40_MSK)
812 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
813 if (rate_n_flags & RATE_MCS_DUP_MSK)
814 r->flags |= IEEE80211_TX_RC_DUP_DATA;
815 if (rate_n_flags & RATE_MCS_SGI_MSK)
816 r->flags |= IEEE80211_TX_RC_SHORT_GI;
817 r->idx = iwlagn_hwrate_to_mac80211_idx(rate_n_flags, info->band);
818}
819
820#ifdef CONFIG_IWLWIFI_DEBUG
821const char *iwl_get_tx_fail_reason(u32 status)
822{
823#define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
824#define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
825
826 switch (status & TX_STATUS_MSK) {
827 case TX_STATUS_SUCCESS:
828 return "SUCCESS";
829 TX_STATUS_POSTPONE(DELAY);
830 TX_STATUS_POSTPONE(FEW_BYTES);
831 TX_STATUS_POSTPONE(BT_PRIO);
832 TX_STATUS_POSTPONE(QUIET_PERIOD);
833 TX_STATUS_POSTPONE(CALC_TTAK);
834 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
835 TX_STATUS_FAIL(SHORT_LIMIT);
836 TX_STATUS_FAIL(LONG_LIMIT);
837 TX_STATUS_FAIL(FIFO_UNDERRUN);
838 TX_STATUS_FAIL(DRAIN_FLOW);
839 TX_STATUS_FAIL(RFKILL_FLUSH);
840 TX_STATUS_FAIL(LIFE_EXPIRE);
841 TX_STATUS_FAIL(DEST_PS);
842 TX_STATUS_FAIL(HOST_ABORTED);
843 TX_STATUS_FAIL(BT_RETRY);
844 TX_STATUS_FAIL(STA_INVALID);
845 TX_STATUS_FAIL(FRAG_DROPPED);
846 TX_STATUS_FAIL(TID_DISABLE);
847 TX_STATUS_FAIL(FIFO_FLUSHED);
848 TX_STATUS_FAIL(INSUFFICIENT_CF_POLL);
849 TX_STATUS_FAIL(PASSIVE_NO_RX);
850 TX_STATUS_FAIL(NO_BEACON_ON_RADAR);
851 }
852
853 return "UNKNOWN";
854
855#undef TX_STATUS_FAIL
856#undef TX_STATUS_POSTPONE
857}
858#endif /* CONFIG_IWLWIFI_DEBUG */
859
860static void iwlagn_count_agg_tx_err_status(struct iwl_priv *priv, u16 status)
861{
862 status &= AGG_TX_STATUS_MSK;
863
864 switch (status) {
865 case AGG_TX_STATE_UNDERRUN_MSK:
866 priv->reply_agg_tx_stats.underrun++;
867 break;
868 case AGG_TX_STATE_BT_PRIO_MSK:
869 priv->reply_agg_tx_stats.bt_prio++;
870 break;
871 case AGG_TX_STATE_FEW_BYTES_MSK:
872 priv->reply_agg_tx_stats.few_bytes++;
873 break;
874 case AGG_TX_STATE_ABORT_MSK:
875 priv->reply_agg_tx_stats.abort++;
876 break;
877 case AGG_TX_STATE_LAST_SENT_TTL_MSK:
878 priv->reply_agg_tx_stats.last_sent_ttl++;
879 break;
880 case AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK:
881 priv->reply_agg_tx_stats.last_sent_try++;
882 break;
883 case AGG_TX_STATE_LAST_SENT_BT_KILL_MSK:
884 priv->reply_agg_tx_stats.last_sent_bt_kill++;
885 break;
886 case AGG_TX_STATE_SCD_QUERY_MSK:
887 priv->reply_agg_tx_stats.scd_query++;
888 break;
889 case AGG_TX_STATE_TEST_BAD_CRC32_MSK:
890 priv->reply_agg_tx_stats.bad_crc32++;
891 break;
892 case AGG_TX_STATE_RESPONSE_MSK:
893 priv->reply_agg_tx_stats.response++;
894 break;
895 case AGG_TX_STATE_DUMP_TX_MSK:
896 priv->reply_agg_tx_stats.dump_tx++;
897 break;
898 case AGG_TX_STATE_DELAY_TX_MSK:
899 priv->reply_agg_tx_stats.delay_tx++;
900 break;
901 default:
902 priv->reply_agg_tx_stats.unknown++;
903 break;
904 }
905}
906
907static void iwl_rx_reply_tx_agg(struct iwl_priv *priv,
908 struct iwlagn_tx_resp *tx_resp)
909{
910 struct agg_tx_status *frame_status = &tx_resp->status;
911 int tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
912 IWLAGN_TX_RES_TID_POS;
913 int sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
914 IWLAGN_TX_RES_RA_POS;
915 struct iwl_ht_agg *agg = &priv->tid_data[sta_id][tid].agg;
916 u32 status = le16_to_cpu(tx_resp->status.status);
917 int i;
918
919 WARN_ON(tid == IWL_TID_NON_QOS);
920
921 if (agg->wait_for_ba)
922 IWL_DEBUG_TX_REPLY(priv,
923 "got tx response w/o block-ack\n");
924
925 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
926 agg->wait_for_ba = (tx_resp->frame_count > 1);
927
928 /*
929 * If the BT kill count is non-zero, we'll get this
930 * notification again.
931 */
932 if (tx_resp->bt_kill_count && tx_resp->frame_count == 1 &&
933 priv->cfg->bt_params &&
934 priv->cfg->bt_params->advanced_bt_coexist) {
935 IWL_DEBUG_COEX(priv, "receive reply tx w/ bt_kill\n");
936 }
937
938 if (tx_resp->frame_count == 1)
939 return;
940
941 /* Construct bit-map of pending frames within Tx window */
942 for (i = 0; i < tx_resp->frame_count; i++) {
943 u16 fstatus = le16_to_cpu(frame_status[i].status);
944
945 if (status & AGG_TX_STATUS_MSK)
946 iwlagn_count_agg_tx_err_status(priv, fstatus);
947
948 if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
949 AGG_TX_STATE_ABORT_MSK))
950 continue;
951
952 IWL_DEBUG_TX_REPLY(priv, "status %s (0x%08x), "
953 "try-count (0x%08x)\n",
954 iwl_get_agg_tx_fail_reason(fstatus),
955 fstatus & AGG_TX_STATUS_MSK,
956 fstatus & AGG_TX_TRY_MSK);
957 }
958}
959
960#ifdef CONFIG_IWLWIFI_DEBUG
961#define AGG_TX_STATE_FAIL(x) case AGG_TX_STATE_ ## x: return #x
962
963const char *iwl_get_agg_tx_fail_reason(u16 status)
964{
965 status &= AGG_TX_STATUS_MSK;
966 switch (status) {
967 case AGG_TX_STATE_TRANSMITTED:
968 return "SUCCESS";
969 AGG_TX_STATE_FAIL(UNDERRUN_MSK);
970 AGG_TX_STATE_FAIL(BT_PRIO_MSK);
971 AGG_TX_STATE_FAIL(FEW_BYTES_MSK);
972 AGG_TX_STATE_FAIL(ABORT_MSK);
973 AGG_TX_STATE_FAIL(LAST_SENT_TTL_MSK);
974 AGG_TX_STATE_FAIL(LAST_SENT_TRY_CNT_MSK);
975 AGG_TX_STATE_FAIL(LAST_SENT_BT_KILL_MSK);
976 AGG_TX_STATE_FAIL(SCD_QUERY_MSK);
977 AGG_TX_STATE_FAIL(TEST_BAD_CRC32_MSK);
978 AGG_TX_STATE_FAIL(RESPONSE_MSK);
979 AGG_TX_STATE_FAIL(DUMP_TX_MSK);
980 AGG_TX_STATE_FAIL(DELAY_TX_MSK);
981 }
982
983 return "UNKNOWN";
984}
985#endif /* CONFIG_IWLWIFI_DEBUG */
986
987static inline u32 iwlagn_get_scd_ssn(struct iwlagn_tx_resp *tx_resp)
988{
989 return le32_to_cpup((__le32 *)&tx_resp->status +
990 tx_resp->frame_count) & MAX_SN;
991}
992
993static void iwlagn_count_tx_err_status(struct iwl_priv *priv, u16 status)
994{
995 status &= TX_STATUS_MSK;
996
997 switch (status) {
998 case TX_STATUS_POSTPONE_DELAY:
999 priv->reply_tx_stats.pp_delay++;
1000 break;
1001 case TX_STATUS_POSTPONE_FEW_BYTES:
1002 priv->reply_tx_stats.pp_few_bytes++;
1003 break;
1004 case TX_STATUS_POSTPONE_BT_PRIO:
1005 priv->reply_tx_stats.pp_bt_prio++;
1006 break;
1007 case TX_STATUS_POSTPONE_QUIET_PERIOD:
1008 priv->reply_tx_stats.pp_quiet_period++;
1009 break;
1010 case TX_STATUS_POSTPONE_CALC_TTAK:
1011 priv->reply_tx_stats.pp_calc_ttak++;
1012 break;
1013 case TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY:
1014 priv->reply_tx_stats.int_crossed_retry++;
1015 break;
1016 case TX_STATUS_FAIL_SHORT_LIMIT:
1017 priv->reply_tx_stats.short_limit++;
1018 break;
1019 case TX_STATUS_FAIL_LONG_LIMIT:
1020 priv->reply_tx_stats.long_limit++;
1021 break;
1022 case TX_STATUS_FAIL_FIFO_UNDERRUN:
1023 priv->reply_tx_stats.fifo_underrun++;
1024 break;
1025 case TX_STATUS_FAIL_DRAIN_FLOW:
1026 priv->reply_tx_stats.drain_flow++;
1027 break;
1028 case TX_STATUS_FAIL_RFKILL_FLUSH:
1029 priv->reply_tx_stats.rfkill_flush++;
1030 break;
1031 case TX_STATUS_FAIL_LIFE_EXPIRE:
1032 priv->reply_tx_stats.life_expire++;
1033 break;
1034 case TX_STATUS_FAIL_DEST_PS:
1035 priv->reply_tx_stats.dest_ps++;
1036 break;
1037 case TX_STATUS_FAIL_HOST_ABORTED:
1038 priv->reply_tx_stats.host_abort++;
1039 break;
1040 case TX_STATUS_FAIL_BT_RETRY:
1041 priv->reply_tx_stats.bt_retry++;
1042 break;
1043 case TX_STATUS_FAIL_STA_INVALID:
1044 priv->reply_tx_stats.sta_invalid++;
1045 break;
1046 case TX_STATUS_FAIL_FRAG_DROPPED:
1047 priv->reply_tx_stats.frag_drop++;
1048 break;
1049 case TX_STATUS_FAIL_TID_DISABLE:
1050 priv->reply_tx_stats.tid_disable++;
1051 break;
1052 case TX_STATUS_FAIL_FIFO_FLUSHED:
1053 priv->reply_tx_stats.fifo_flush++;
1054 break;
1055 case TX_STATUS_FAIL_INSUFFICIENT_CF_POLL:
1056 priv->reply_tx_stats.insuff_cf_poll++;
1057 break;
1058 case TX_STATUS_FAIL_PASSIVE_NO_RX:
1059 priv->reply_tx_stats.fail_hw_drop++;
1060 break;
1061 case TX_STATUS_FAIL_NO_BEACON_ON_RADAR:
1062 priv->reply_tx_stats.sta_color_mismatch++;
1063 break;
1064 default:
1065 priv->reply_tx_stats.unknown++;
1066 break;
1067 }
1068}
1069
1070static void iwlagn_set_tx_status(struct iwl_priv *priv,
1071 struct ieee80211_tx_info *info,
1072 struct iwlagn_tx_resp *tx_resp,
1073 bool is_agg)
1074{
1075 u16 status = le16_to_cpu(tx_resp->status.status);
1076
1077 info->status.rates[0].count = tx_resp->failure_frame + 1;
1078 if (is_agg)
1079 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1080 info->flags |= iwl_tx_status_to_mac80211(status);
1081 iwlagn_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
1082 info);
1083 if (!iwl_is_tx_success(status))
1084 iwlagn_count_tx_err_status(priv, status);
1085}
1086
1087static void iwl_check_abort_status(struct iwl_priv *priv,
1088 u8 frame_count, u32 status)
1089{
1090 if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) {
1091 IWL_ERR(priv, "Tx flush command to flush out all frames\n");
1092 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
1093 queue_work(priv->workqueue, &priv->tx_flush);
1094 }
1095}
1096
1097static int iwl_reclaim(struct iwl_priv *priv, int sta_id, int tid,
1098 int txq_id, int ssn, struct sk_buff_head *skbs)
1099{
1100 if (unlikely(txq_id >= IWLAGN_FIRST_AMPDU_QUEUE &&
1101 tid != IWL_TID_NON_QOS &&
1102 txq_id != priv->tid_data[sta_id][tid].agg.txq_id)) {
1103 /*
1104 * FIXME: this is a uCode bug which need to be addressed,
1105 * log the information and return for now.
1106 * Since it is can possibly happen very often and in order
1107 * not to fill the syslog, don't use IWL_ERR or IWL_WARN
1108 */
1109 IWL_DEBUG_TX_QUEUES(priv,
1110 "Bad queue mapping txq_id=%d, agg_txq[sta:%d,tid:%d]=%d\n",
1111 txq_id, sta_id, tid,
1112 priv->tid_data[sta_id][tid].agg.txq_id);
1113 return 1;
1114 }
1115
1116 iwl_trans_reclaim(priv->trans, txq_id, ssn, skbs);
1117 return 0;
1118}
1119
1120int iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb,
1121 struct iwl_device_cmd *cmd)
1122{
1123 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1124 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1125 int txq_id = SEQ_TO_QUEUE(sequence);
1126 int cmd_index __maybe_unused = SEQ_TO_INDEX(sequence);
1127 struct iwlagn_tx_resp *tx_resp = (void *)pkt->data;
1128 struct ieee80211_hdr *hdr;
1129 u32 status = le16_to_cpu(tx_resp->status.status);
1130 u16 ssn = iwlagn_get_scd_ssn(tx_resp);
1131 int tid;
1132 int sta_id;
1133 int freed;
1134 struct ieee80211_tx_info *info;
1135 struct sk_buff_head skbs;
1136 struct sk_buff *skb;
1137 struct iwl_rxon_context *ctx;
1138 bool is_agg = (txq_id >= IWLAGN_FIRST_AMPDU_QUEUE);
1139
1140 tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
1141 IWLAGN_TX_RES_TID_POS;
1142 sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
1143 IWLAGN_TX_RES_RA_POS;
1144
1145 spin_lock(&priv->sta_lock);
1146
1147 if (is_agg)
1148 iwl_rx_reply_tx_agg(priv, tx_resp);
1149
1150 __skb_queue_head_init(&skbs);
1151
1152 if (tx_resp->frame_count == 1) {
1153 u16 next_reclaimed = le16_to_cpu(tx_resp->seq_ctl);
1154 next_reclaimed = SEQ_TO_SN(next_reclaimed + 0x10);
1155
1156 if (is_agg) {
1157 /* If this is an aggregation queue, we can rely on the
1158 * ssn since the wifi sequence number corresponds to
1159 * the index in the TFD ring (%256).
1160 * The seq_ctl is the sequence control of the packet
1161 * to which this Tx response relates. But if there is a
1162 * hole in the bitmap of the BA we received, this Tx
1163 * response may allow to reclaim the hole and all the
1164 * subsequent packets that were already acked.
1165 * In that case, seq_ctl != ssn, and the next packet
1166 * to be reclaimed will be ssn and not seq_ctl.
1167 */
1168 next_reclaimed = ssn;
1169 }
1170
1171 if (tid != IWL_TID_NON_QOS) {
1172 priv->tid_data[sta_id][tid].next_reclaimed =
1173 next_reclaimed;
1174 IWL_DEBUG_TX_REPLY(priv, "Next reclaimed packet:%d\n",
1175 next_reclaimed);
1176 }
1177
1178 /*we can free until ssn % q.n_bd not inclusive */
1179 WARN_ON(iwl_reclaim(priv, sta_id, tid, txq_id, ssn, &skbs));
1180 iwlagn_check_ratid_empty(priv, sta_id, tid);
1181 freed = 0;
1182
1183 /* process frames */
1184 skb_queue_walk(&skbs, skb) {
1185 hdr = (struct ieee80211_hdr *)skb->data;
1186
1187 if (!ieee80211_is_data_qos(hdr->frame_control))
1188 priv->last_seq_ctl = tx_resp->seq_ctl;
1189
1190 info = IEEE80211_SKB_CB(skb);
1191 ctx = info->driver_data[0];
1192 kmem_cache_free(iwl_tx_cmd_pool,
1193 (info->driver_data[1]));
1194
1195 memset(&info->status, 0, sizeof(info->status));
1196
1197 if (status == TX_STATUS_FAIL_PASSIVE_NO_RX &&
1198 iwl_is_associated_ctx(ctx) && ctx->vif &&
1199 ctx->vif->type == NL80211_IFTYPE_STATION) {
1200 /* block and stop all queues */
1201 priv->passive_no_rx = true;
1202 IWL_DEBUG_TX_QUEUES(priv, "stop all queues: "
1203 "passive channel");
1204 ieee80211_stop_queues(priv->hw);
1205
1206 IWL_DEBUG_TX_REPLY(priv,
1207 "TXQ %d status %s (0x%08x) "
1208 "rate_n_flags 0x%x retries %d\n",
1209 txq_id,
1210 iwl_get_tx_fail_reason(status),
1211 status,
1212 le32_to_cpu(tx_resp->rate_n_flags),
1213 tx_resp->failure_frame);
1214
1215 IWL_DEBUG_TX_REPLY(priv,
1216 "FrameCnt = %d, idx=%d\n",
1217 tx_resp->frame_count, cmd_index);
1218 }
1219
1220 /* check if BAR is needed */
1221 if (is_agg && !iwl_is_tx_success(status))
1222 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1223 iwlagn_set_tx_status(priv, IEEE80211_SKB_CB(skb),
1224 tx_resp, is_agg);
1225 if (!is_agg)
1226 iwlagn_non_agg_tx_status(priv, ctx, hdr->addr1);
1227
1228 freed++;
1229 }
1230
1231 WARN_ON(!is_agg && freed != 1);
1232 }
1233
1234 iwl_check_abort_status(priv, tx_resp->frame_count, status);
1235 spin_unlock(&priv->sta_lock);
1236
1237 while (!skb_queue_empty(&skbs)) {
1238 skb = __skb_dequeue(&skbs);
1239 ieee80211_tx_status(priv->hw, skb);
1240 }
1241
1242 return 0;
1243}
1244
1245/**
1246 * iwlagn_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
1247 *
1248 * Handles block-acknowledge notification from device, which reports success
1249 * of frames sent via aggregation.
1250 */
1251int iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv,
1252 struct iwl_rx_cmd_buffer *rxb,
1253 struct iwl_device_cmd *cmd)
1254{
1255 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1256 struct iwl_compressed_ba_resp *ba_resp = (void *)pkt->data;
1257 struct iwl_ht_agg *agg;
1258 struct sk_buff_head reclaimed_skbs;
1259 struct ieee80211_tx_info *info;
1260 struct ieee80211_hdr *hdr;
1261 struct sk_buff *skb;
1262 int sta_id;
1263 int tid;
1264 int freed;
1265
1266 /* "flow" corresponds to Tx queue */
1267 u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
1268
1269 /* "ssn" is start of block-ack Tx window, corresponds to index
1270 * (in Tx queue's circular buffer) of first TFD/frame in window */
1271 u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
1272
1273 if (scd_flow >= priv->cfg->base_params->num_of_queues) {
1274 IWL_ERR(priv,
1275 "BUG_ON scd_flow is bigger than number of queues\n");
1276 return 0;
1277 }
1278
1279 sta_id = ba_resp->sta_id;
1280 tid = ba_resp->tid;
1281 agg = &priv->tid_data[sta_id][tid].agg;
1282
1283 spin_lock(&priv->sta_lock);
1284
1285 if (unlikely(!agg->wait_for_ba)) {
1286 if (unlikely(ba_resp->bitmap))
1287 IWL_ERR(priv, "Received BA when not expected\n");
1288 spin_unlock(&priv->sta_lock);
1289 return 0;
1290 }
1291
1292 __skb_queue_head_init(&reclaimed_skbs);
1293
1294 /* Release all TFDs before the SSN, i.e. all TFDs in front of
1295 * block-ack window (we assume that they've been successfully
1296 * transmitted ... if not, it's too late anyway). */
1297 if (iwl_reclaim(priv, sta_id, tid, scd_flow,
1298 ba_resp_scd_ssn, &reclaimed_skbs)) {
1299 spin_unlock(&priv->sta_lock);
1300 return 0;
1301 }
1302
1303 IWL_DEBUG_TX_REPLY(priv, "REPLY_COMPRESSED_BA [%d] Received from %pM, "
1304 "sta_id = %d\n",
1305 agg->wait_for_ba,
1306 (u8 *) &ba_resp->sta_addr_lo32,
1307 ba_resp->sta_id);
1308 IWL_DEBUG_TX_REPLY(priv, "TID = %d, SeqCtl = %d, bitmap = 0x%llx, "
1309 "scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
1310 ba_resp->tid, le16_to_cpu(ba_resp->seq_ctl),
1311 (unsigned long long)le64_to_cpu(ba_resp->bitmap),
1312 scd_flow, ba_resp_scd_ssn, ba_resp->txed,
1313 ba_resp->txed_2_done);
1314
1315 /* Mark that the expected block-ack response arrived */
1316 agg->wait_for_ba = false;
1317
1318 /* Sanity check values reported by uCode */
1319 if (ba_resp->txed_2_done > ba_resp->txed) {
1320 IWL_DEBUG_TX_REPLY(priv,
1321 "bogus sent(%d) and ack(%d) count\n",
1322 ba_resp->txed, ba_resp->txed_2_done);
1323 /*
1324 * set txed_2_done = txed,
1325 * so it won't impact rate scale
1326 */
1327 ba_resp->txed = ba_resp->txed_2_done;
1328 }
1329
1330 priv->tid_data[sta_id][tid].next_reclaimed = ba_resp_scd_ssn;
1331
1332 iwlagn_check_ratid_empty(priv, sta_id, tid);
1333 freed = 0;
1334
1335 skb_queue_walk(&reclaimed_skbs, skb) {
1336 hdr = (struct ieee80211_hdr *)skb->data;
1337
1338 if (ieee80211_is_data_qos(hdr->frame_control))
1339 freed++;
1340 else
1341 WARN_ON_ONCE(1);
1342
1343 info = IEEE80211_SKB_CB(skb);
1344 kmem_cache_free(iwl_tx_cmd_pool, (info->driver_data[1]));
1345
1346 if (freed == 1) {
1347 /* this is the first skb we deliver in this batch */
1348 /* put the rate scaling data there */
1349 info = IEEE80211_SKB_CB(skb);
1350 memset(&info->status, 0, sizeof(info->status));
1351 info->flags |= IEEE80211_TX_STAT_ACK;
1352 info->flags |= IEEE80211_TX_STAT_AMPDU;
1353 info->status.ampdu_ack_len = ba_resp->txed_2_done;
1354 info->status.ampdu_len = ba_resp->txed;
1355 iwlagn_hwrate_to_tx_control(priv, agg->rate_n_flags,
1356 info);
1357 }
1358 }
1359
1360 spin_unlock(&priv->sta_lock);
1361
1362 while (!skb_queue_empty(&reclaimed_skbs)) {
1363 skb = __skb_dequeue(&reclaimed_skbs);
1364 ieee80211_tx_status(priv->hw, skb);
1365 }
1366
1367 return 0;
1368}