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iwlwifi: move packet to transport
[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 void iwlagn_tx_cmd_protection(struct iwl_priv *priv,
44 struct ieee80211_tx_info *info,
45 __le16 fc, __le32 *tx_flags)
46 {
47 if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS ||
48 info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT ||
49 info->flags & IEEE80211_TX_CTL_AMPDU)
50 *tx_flags |= TX_CMD_FLG_PROT_REQUIRE_MSK;
51 }
52
53 /*
54 * handle build REPLY_TX command notification.
55 */
56 static void iwlagn_tx_cmd_build_basic(struct iwl_priv *priv,
57 struct sk_buff *skb,
58 struct iwl_tx_cmd *tx_cmd,
59 struct ieee80211_tx_info *info,
60 struct ieee80211_hdr *hdr, u8 sta_id)
61 {
62 __le16 fc = hdr->frame_control;
63 __le32 tx_flags = tx_cmd->tx_flags;
64
65 tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
66
67 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
68 tx_flags |= TX_CMD_FLG_ACK_MSK;
69 else
70 tx_flags &= ~TX_CMD_FLG_ACK_MSK;
71
72 if (ieee80211_is_probe_resp(fc))
73 tx_flags |= TX_CMD_FLG_TSF_MSK;
74 else if (ieee80211_is_back_req(fc))
75 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK;
76 else if (info->band == IEEE80211_BAND_2GHZ &&
77 cfg(priv)->bt_params &&
78 cfg(priv)->bt_params->advanced_bt_coexist &&
79 (ieee80211_is_auth(fc) || ieee80211_is_assoc_req(fc) ||
80 ieee80211_is_reassoc_req(fc) ||
81 skb->protocol == cpu_to_be16(ETH_P_PAE)))
82 tx_flags |= TX_CMD_FLG_IGNORE_BT;
83
84
85 tx_cmd->sta_id = sta_id;
86 if (ieee80211_has_morefrags(fc))
87 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
88
89 if (ieee80211_is_data_qos(fc)) {
90 u8 *qc = ieee80211_get_qos_ctl(hdr);
91 tx_cmd->tid_tspec = qc[0] & 0xf;
92 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
93 } else {
94 tx_cmd->tid_tspec = IWL_TID_NON_QOS;
95 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
96 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
97 else
98 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
99 }
100
101 iwlagn_tx_cmd_protection(priv, info, fc, &tx_flags);
102
103 tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
104 if (ieee80211_is_mgmt(fc)) {
105 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
106 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
107 else
108 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
109 } else {
110 tx_cmd->timeout.pm_frame_timeout = 0;
111 }
112
113 tx_cmd->driver_txop = 0;
114 tx_cmd->tx_flags = tx_flags;
115 tx_cmd->next_frame_len = 0;
116 }
117
118 static void iwlagn_tx_cmd_build_rate(struct iwl_priv *priv,
119 struct iwl_tx_cmd *tx_cmd,
120 struct ieee80211_tx_info *info,
121 __le16 fc)
122 {
123 u32 rate_flags;
124 int rate_idx;
125 u8 rts_retry_limit;
126 u8 data_retry_limit;
127 u8 rate_plcp;
128
129 if (priv->wowlan) {
130 rts_retry_limit = IWLAGN_LOW_RETRY_LIMIT;
131 data_retry_limit = IWLAGN_LOW_RETRY_LIMIT;
132 } else {
133 /* Set retry limit on RTS packets */
134 rts_retry_limit = IWLAGN_RTS_DFAULT_RETRY_LIMIT;
135
136 /* Set retry limit on DATA packets and Probe Responses*/
137 if (ieee80211_is_probe_resp(fc)) {
138 data_retry_limit = IWLAGN_MGMT_DFAULT_RETRY_LIMIT;
139 rts_retry_limit =
140 min(data_retry_limit, rts_retry_limit);
141 } else if (ieee80211_is_back_req(fc))
142 data_retry_limit = IWLAGN_BAR_DFAULT_RETRY_LIMIT;
143 else
144 data_retry_limit = IWLAGN_DEFAULT_TX_RETRY;
145 }
146
147 tx_cmd->data_retry_limit = data_retry_limit;
148 tx_cmd->rts_retry_limit = rts_retry_limit;
149
150 /* DATA packets will use the uCode station table for rate/antenna
151 * selection */
152 if (ieee80211_is_data(fc)) {
153 tx_cmd->initial_rate_index = 0;
154 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
155 #ifdef CONFIG_IWLWIFI_DEVICE_TESTMODE
156 if (priv->tm_fixed_rate) {
157 /*
158 * rate overwrite by testmode
159 * we not only send lq command to change rate
160 * we also re-enforce per data pkt base.
161 */
162 tx_cmd->tx_flags &= ~TX_CMD_FLG_STA_RATE_MSK;
163 memcpy(&tx_cmd->rate_n_flags, &priv->tm_fixed_rate,
164 sizeof(tx_cmd->rate_n_flags));
165 }
166 #endif
167 return;
168 } else if (ieee80211_is_back_req(fc))
169 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
170
171 /**
172 * If the current TX rate stored in mac80211 has the MCS bit set, it's
173 * not really a TX rate. Thus, we use the lowest supported rate for
174 * this band. Also use the lowest supported rate if the stored rate
175 * index is invalid.
176 */
177 rate_idx = info->control.rates[0].idx;
178 if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS ||
179 (rate_idx < 0) || (rate_idx > IWL_RATE_COUNT_LEGACY))
180 rate_idx = rate_lowest_index(&priv->bands[info->band],
181 info->control.sta);
182 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
183 if (info->band == IEEE80211_BAND_5GHZ)
184 rate_idx += IWL_FIRST_OFDM_RATE;
185 /* Get PLCP rate for tx_cmd->rate_n_flags */
186 rate_plcp = iwl_rates[rate_idx].plcp;
187 /* Zero out flags for this packet */
188 rate_flags = 0;
189
190 /* Set CCK flag as needed */
191 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
192 rate_flags |= RATE_MCS_CCK_MSK;
193
194 /* Set up antennas */
195 if (cfg(priv)->bt_params &&
196 cfg(priv)->bt_params->advanced_bt_coexist &&
197 priv->bt_full_concurrent) {
198 /* operated as 1x1 in full concurrency mode */
199 priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
200 first_antenna(hw_params(priv).valid_tx_ant));
201 } else
202 priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
203 hw_params(priv).valid_tx_ant);
204 rate_flags |= iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
205
206 /* Set the rate in the TX cmd */
207 tx_cmd->rate_n_flags = iwl_hw_set_rate_n_flags(rate_plcp, rate_flags);
208 }
209
210 static void iwlagn_tx_cmd_build_hwcrypto(struct iwl_priv *priv,
211 struct ieee80211_tx_info *info,
212 struct iwl_tx_cmd *tx_cmd,
213 struct sk_buff *skb_frag)
214 {
215 struct ieee80211_key_conf *keyconf = info->control.hw_key;
216
217 switch (keyconf->cipher) {
218 case WLAN_CIPHER_SUITE_CCMP:
219 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
220 memcpy(tx_cmd->key, keyconf->key, keyconf->keylen);
221 if (info->flags & IEEE80211_TX_CTL_AMPDU)
222 tx_cmd->tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
223 IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n");
224 break;
225
226 case WLAN_CIPHER_SUITE_TKIP:
227 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
228 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
229 IWL_DEBUG_TX(priv, "tx_cmd with tkip hwcrypto\n");
230 break;
231
232 case WLAN_CIPHER_SUITE_WEP104:
233 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
234 /* fall through */
235 case WLAN_CIPHER_SUITE_WEP40:
236 tx_cmd->sec_ctl |= (TX_CMD_SEC_WEP |
237 (keyconf->keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT);
238
239 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
240
241 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
242 "with key %d\n", keyconf->keyidx);
243 break;
244
245 default:
246 IWL_ERR(priv, "Unknown encode cipher %x\n", keyconf->cipher);
247 break;
248 }
249 }
250
251 /*
252 * start REPLY_TX command process
253 */
254 int iwlagn_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
255 {
256 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
257 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
258 struct iwl_station_priv *sta_priv = NULL;
259 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
260 struct iwl_device_cmd *dev_cmd = NULL;
261 struct iwl_tx_cmd *tx_cmd;
262 __le16 fc;
263 u8 hdr_len;
264 u16 len, seq_number = 0;
265 u8 sta_id, tid = IWL_MAX_TID_COUNT;
266 bool is_agg = false;
267
268 if (info->control.vif)
269 ctx = iwl_rxon_ctx_from_vif(info->control.vif);
270
271 if (iwl_is_rfkill(priv->shrd)) {
272 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
273 goto drop_unlock_priv;
274 }
275
276 fc = hdr->frame_control;
277
278 #ifdef CONFIG_IWLWIFI_DEBUG
279 if (ieee80211_is_auth(fc))
280 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
281 else if (ieee80211_is_assoc_req(fc))
282 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
283 else if (ieee80211_is_reassoc_req(fc))
284 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
285 #endif
286
287 if (unlikely(ieee80211_is_probe_resp(fc))) {
288 struct iwl_wipan_noa_data *noa_data =
289 rcu_dereference(priv->noa_data);
290
291 if (noa_data &&
292 pskb_expand_head(skb, 0, noa_data->length,
293 GFP_ATOMIC) == 0) {
294 memcpy(skb_put(skb, noa_data->length),
295 noa_data->data, noa_data->length);
296 hdr = (struct ieee80211_hdr *)skb->data;
297 }
298 }
299
300 hdr_len = ieee80211_hdrlen(fc);
301
302 /* For management frames use broadcast id to do not break aggregation */
303 if (!ieee80211_is_data(fc))
304 sta_id = ctx->bcast_sta_id;
305 else {
306 /* Find index into station table for destination station */
307 sta_id = iwl_sta_id_or_broadcast(priv, ctx, info->control.sta);
308 if (sta_id == IWL_INVALID_STATION) {
309 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
310 hdr->addr1);
311 goto drop_unlock_priv;
312 }
313 }
314
315 IWL_DEBUG_TX(priv, "station Id %d\n", sta_id);
316
317 if (info->control.sta)
318 sta_priv = (void *)info->control.sta->drv_priv;
319
320 if (sta_priv && sta_priv->asleep &&
321 (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER)) {
322 /*
323 * This sends an asynchronous command to the device,
324 * but we can rely on it being processed before the
325 * next frame is processed -- and the next frame to
326 * this station is the one that will consume this
327 * counter.
328 * For now set the counter to just 1 since we do not
329 * support uAPSD yet.
330 *
331 * FIXME: If we get two non-bufferable frames one
332 * after the other, we might only send out one of
333 * them because this is racy.
334 */
335 iwl_sta_modify_sleep_tx_count(priv, sta_id, 1);
336 }
337
338 if (info->flags & IEEE80211_TX_CTL_AMPDU)
339 is_agg = true;
340
341 dev_cmd = kmem_cache_alloc(priv->tx_cmd_pool, GFP_ATOMIC);
342
343 if (unlikely(!dev_cmd))
344 goto drop_unlock_priv;
345
346 memset(dev_cmd, 0, sizeof(*dev_cmd));
347 tx_cmd = (struct iwl_tx_cmd *) dev_cmd->payload;
348
349 /* Total # bytes to be transmitted */
350 len = (u16)skb->len;
351 tx_cmd->len = cpu_to_le16(len);
352
353 if (info->control.hw_key)
354 iwlagn_tx_cmd_build_hwcrypto(priv, info, tx_cmd, skb);
355
356 /* TODO need this for burst mode later on */
357 iwlagn_tx_cmd_build_basic(priv, skb, tx_cmd, info, hdr, sta_id);
358 iwl_dbg_log_tx_data_frame(priv, len, hdr);
359
360 iwlagn_tx_cmd_build_rate(priv, tx_cmd, info, fc);
361
362 iwl_update_stats(priv, true, fc, len);
363
364 memset(&info->status, 0, sizeof(info->status));
365
366 info->driver_data[0] = ctx;
367 info->driver_data[1] = dev_cmd;
368
369 spin_lock(&priv->sta_lock);
370
371 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
372 u8 *qc = NULL;
373 struct iwl_tid_data *tid_data;
374 qc = ieee80211_get_qos_ctl(hdr);
375 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
376 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
377 goto drop_unlock_sta;
378 tid_data = &priv->tid_data[sta_id][tid];
379
380 /* aggregation is on for this <sta,tid> */
381 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
382 tid_data->agg.state != IWL_AGG_ON) {
383 IWL_ERR(priv, "TX_CTL_AMPDU while not in AGG:"
384 " Tx flags = 0x%08x, agg.state = %d",
385 info->flags, tid_data->agg.state);
386 IWL_ERR(priv, "sta_id = %d, tid = %d seq_num = %d",
387 sta_id, tid, SEQ_TO_SN(tid_data->seq_number));
388 goto drop_unlock_sta;
389 }
390
391 /* We can receive packets from the stack in IWL_AGG_{ON,OFF}
392 * only. Check this here.
393 */
394 if (WARN_ONCE(tid_data->agg.state != IWL_AGG_ON &&
395 tid_data->agg.state != IWL_AGG_OFF,
396 "Tx while agg.state = %d", tid_data->agg.state))
397 goto drop_unlock_sta;
398
399 seq_number = tid_data->seq_number;
400 seq_number &= IEEE80211_SCTL_SEQ;
401 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
402 hdr->seq_ctrl |= cpu_to_le16(seq_number);
403 seq_number += 0x10;
404 }
405
406 /* Copy MAC header from skb into command buffer */
407 memcpy(tx_cmd->hdr, hdr, hdr_len);
408
409 if (iwl_trans_tx(trans(priv), skb, dev_cmd, ctx->ctxid, sta_id, tid))
410 goto drop_unlock_sta;
411
412 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc) &&
413 !ieee80211_has_morefrags(fc))
414 priv->tid_data[sta_id][tid].seq_number = seq_number;
415
416 spin_unlock(&priv->sta_lock);
417
418 /*
419 * Avoid atomic ops if it isn't an associated client.
420 * Also, if this is a packet for aggregation, don't
421 * increase the counter because the ucode will stop
422 * aggregation queues when their respective station
423 * goes to sleep.
424 */
425 if (sta_priv && sta_priv->client && !is_agg)
426 atomic_inc(&sta_priv->pending_frames);
427
428 return 0;
429
430 drop_unlock_sta:
431 if (dev_cmd)
432 kmem_cache_free(priv->tx_cmd_pool, dev_cmd);
433 spin_unlock(&priv->sta_lock);
434 drop_unlock_priv:
435 return -1;
436 }
437
438 int iwlagn_tx_agg_stop(struct iwl_priv *priv, struct ieee80211_vif *vif,
439 struct ieee80211_sta *sta, u16 tid)
440 {
441 struct iwl_tid_data *tid_data;
442 int sta_id;
443
444 sta_id = iwl_sta_id(sta);
445
446 if (sta_id == IWL_INVALID_STATION) {
447 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
448 return -ENXIO;
449 }
450
451 spin_lock_bh(&priv->sta_lock);
452
453 tid_data = &priv->tid_data[sta_id][tid];
454
455 switch (priv->tid_data[sta_id][tid].agg.state) {
456 case IWL_EMPTYING_HW_QUEUE_ADDBA:
457 /*
458 * This can happen if the peer stops aggregation
459 * again before we've had a chance to drain the
460 * queue we selected previously, i.e. before the
461 * session was really started completely.
462 */
463 IWL_DEBUG_HT(priv, "AGG stop before setup done\n");
464 goto turn_off;
465 case IWL_AGG_ON:
466 break;
467 default:
468 IWL_WARN(priv, "Stopping AGG while state not ON "
469 "or starting for %d on %d (%d)\n", sta_id, tid,
470 priv->tid_data[sta_id][tid].agg.state);
471 spin_unlock_bh(&priv->sta_lock);
472 return 0;
473 }
474
475 tid_data->agg.ssn = SEQ_TO_SN(tid_data->seq_number);
476
477 /* There are still packets for this RA / TID in the HW */
478 if (tid_data->agg.ssn != tid_data->next_reclaimed) {
479 IWL_DEBUG_TX_QUEUES(priv, "Can't proceed: ssn %d, "
480 "next_recl = %d",
481 tid_data->agg.ssn,
482 tid_data->next_reclaimed);
483 priv->tid_data[sta_id][tid].agg.state =
484 IWL_EMPTYING_HW_QUEUE_DELBA;
485 spin_unlock_bh(&priv->sta_lock);
486 return 0;
487 }
488
489 IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d",
490 tid_data->agg.ssn);
491 turn_off:
492 priv->tid_data[sta_id][tid].agg.state = IWL_AGG_OFF;
493
494 spin_unlock_bh(&priv->sta_lock);
495
496 iwl_trans_tx_agg_disable(trans(priv), sta_id, tid);
497
498 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
499
500 return 0;
501 }
502
503 int iwlagn_tx_agg_start(struct iwl_priv *priv, struct ieee80211_vif *vif,
504 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
505 {
506 struct iwl_tid_data *tid_data;
507 int sta_id;
508 int ret;
509
510 IWL_DEBUG_HT(priv, "TX AGG request on ra = %pM tid = %d\n",
511 sta->addr, tid);
512
513 sta_id = iwl_sta_id(sta);
514 if (sta_id == IWL_INVALID_STATION) {
515 IWL_ERR(priv, "Start AGG on invalid station\n");
516 return -ENXIO;
517 }
518 if (unlikely(tid >= IWL_MAX_TID_COUNT))
519 return -EINVAL;
520
521 if (priv->tid_data[sta_id][tid].agg.state != IWL_AGG_OFF) {
522 IWL_ERR(priv, "Start AGG when state is not IWL_AGG_OFF !\n");
523 return -ENXIO;
524 }
525
526 ret = iwl_sta_tx_modify_enable_tid(priv, sta_id, tid);
527 if (ret)
528 return ret;
529
530 spin_lock_bh(&priv->sta_lock);
531
532 tid_data = &priv->tid_data[sta_id][tid];
533 tid_data->agg.ssn = SEQ_TO_SN(tid_data->seq_number);
534
535 *ssn = tid_data->agg.ssn;
536
537 ret = iwl_trans_tx_agg_alloc(trans(priv), sta_id, tid);
538 if (ret) {
539 spin_unlock_bh(&priv->sta_lock);
540 return ret;
541 }
542
543 if (*ssn == tid_data->next_reclaimed) {
544 IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d",
545 tid_data->agg.ssn);
546 tid_data->agg.state = IWL_AGG_ON;
547 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
548 } else {
549 IWL_DEBUG_TX_QUEUES(priv, "Can't proceed: ssn %d, "
550 "next_reclaimed = %d",
551 tid_data->agg.ssn,
552 tid_data->next_reclaimed);
553 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA;
554 }
555
556 spin_unlock_bh(&priv->sta_lock);
557
558 return ret;
559 }
560
561 int iwlagn_tx_agg_oper(struct iwl_priv *priv, struct ieee80211_vif *vif,
562 struct ieee80211_sta *sta, u16 tid, u8 buf_size)
563 {
564 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
565 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
566 u16 ssn;
567
568 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
569
570 spin_lock_bh(&priv->sta_lock);
571 ssn = priv->tid_data[sta_priv->sta_id][tid].agg.ssn;
572 spin_unlock_bh(&priv->sta_lock);
573
574 iwl_trans_tx_agg_setup(trans(priv), ctx->ctxid, sta_priv->sta_id, tid,
575 buf_size, ssn);
576
577 /*
578 * If the limit is 0, then it wasn't initialised yet,
579 * use the default. We can do that since we take the
580 * minimum below, and we don't want to go above our
581 * default due to hardware restrictions.
582 */
583 if (sta_priv->max_agg_bufsize == 0)
584 sta_priv->max_agg_bufsize =
585 LINK_QUAL_AGG_FRAME_LIMIT_DEF;
586
587 /*
588 * Even though in theory the peer could have different
589 * aggregation reorder buffer sizes for different sessions,
590 * our ucode doesn't allow for that and has a global limit
591 * for each station. Therefore, use the minimum of all the
592 * aggregation sessions and our default value.
593 */
594 sta_priv->max_agg_bufsize =
595 min(sta_priv->max_agg_bufsize, buf_size);
596
597 if (hw_params(priv).use_rts_for_aggregation) {
598 /*
599 * switch to RTS/CTS if it is the prefer protection
600 * method for HT traffic
601 */
602
603 sta_priv->lq_sta.lq.general_params.flags |=
604 LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
605 }
606 priv->agg_tids_count++;
607 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
608 priv->agg_tids_count);
609
610 sta_priv->lq_sta.lq.agg_params.agg_frame_cnt_limit =
611 sta_priv->max_agg_bufsize;
612
613 IWL_DEBUG_HT(priv, "Tx aggregation enabled on ra = %pM tid = %d\n",
614 sta->addr, tid);
615
616 return iwl_send_lq_cmd(priv, ctx,
617 &sta_priv->lq_sta.lq, CMD_ASYNC, false);
618 }
619
620 static void iwlagn_check_ratid_empty(struct iwl_priv *priv, int sta_id, u8 tid)
621 {
622 struct iwl_tid_data *tid_data = &priv->tid_data[sta_id][tid];
623 enum iwl_rxon_context_id ctx;
624 struct ieee80211_vif *vif;
625 u8 *addr;
626
627 lockdep_assert_held(&priv->sta_lock);
628
629 addr = priv->stations[sta_id].sta.sta.addr;
630 ctx = priv->stations[sta_id].ctxid;
631 vif = priv->contexts[ctx].vif;
632
633 switch (priv->tid_data[sta_id][tid].agg.state) {
634 case IWL_EMPTYING_HW_QUEUE_DELBA:
635 /* There are no packets for this RA / TID in the HW any more */
636 if (tid_data->agg.ssn == tid_data->next_reclaimed) {
637 IWL_DEBUG_TX_QUEUES(priv,
638 "Can continue DELBA flow ssn = next_recl ="
639 " %d", tid_data->next_reclaimed);
640 iwl_trans_tx_agg_disable(trans(priv), sta_id, tid);
641 tid_data->agg.state = IWL_AGG_OFF;
642 ieee80211_stop_tx_ba_cb_irqsafe(vif, addr, tid);
643 }
644 break;
645 case IWL_EMPTYING_HW_QUEUE_ADDBA:
646 /* There are no packets for this RA / TID in the HW any more */
647 if (tid_data->agg.ssn == tid_data->next_reclaimed) {
648 IWL_DEBUG_TX_QUEUES(priv,
649 "Can continue ADDBA flow ssn = next_recl ="
650 " %d", tid_data->next_reclaimed);
651 tid_data->agg.state = IWL_AGG_ON;
652 ieee80211_start_tx_ba_cb_irqsafe(vif, addr, tid);
653 }
654 break;
655 default:
656 break;
657 }
658 }
659
660 static void iwlagn_non_agg_tx_status(struct iwl_priv *priv,
661 struct iwl_rxon_context *ctx,
662 const u8 *addr1)
663 {
664 struct ieee80211_sta *sta;
665 struct iwl_station_priv *sta_priv;
666
667 rcu_read_lock();
668 sta = ieee80211_find_sta(ctx->vif, addr1);
669 if (sta) {
670 sta_priv = (void *)sta->drv_priv;
671 /* avoid atomic ops if this isn't a client */
672 if (sta_priv->client &&
673 atomic_dec_return(&sta_priv->pending_frames) == 0)
674 ieee80211_sta_block_awake(priv->hw, sta, false);
675 }
676 rcu_read_unlock();
677 }
678
679 /**
680 * translate ucode response to mac80211 tx status control values
681 */
682 static void iwlagn_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
683 struct ieee80211_tx_info *info)
684 {
685 struct ieee80211_tx_rate *r = &info->control.rates[0];
686
687 info->antenna_sel_tx =
688 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
689 if (rate_n_flags & RATE_MCS_HT_MSK)
690 r->flags |= IEEE80211_TX_RC_MCS;
691 if (rate_n_flags & RATE_MCS_GF_MSK)
692 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
693 if (rate_n_flags & RATE_MCS_HT40_MSK)
694 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
695 if (rate_n_flags & RATE_MCS_DUP_MSK)
696 r->flags |= IEEE80211_TX_RC_DUP_DATA;
697 if (rate_n_flags & RATE_MCS_SGI_MSK)
698 r->flags |= IEEE80211_TX_RC_SHORT_GI;
699 r->idx = iwlagn_hwrate_to_mac80211_idx(rate_n_flags, info->band);
700 }
701
702 #ifdef CONFIG_IWLWIFI_DEBUG
703 const char *iwl_get_tx_fail_reason(u32 status)
704 {
705 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
706 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
707
708 switch (status & TX_STATUS_MSK) {
709 case TX_STATUS_SUCCESS:
710 return "SUCCESS";
711 TX_STATUS_POSTPONE(DELAY);
712 TX_STATUS_POSTPONE(FEW_BYTES);
713 TX_STATUS_POSTPONE(BT_PRIO);
714 TX_STATUS_POSTPONE(QUIET_PERIOD);
715 TX_STATUS_POSTPONE(CALC_TTAK);
716 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
717 TX_STATUS_FAIL(SHORT_LIMIT);
718 TX_STATUS_FAIL(LONG_LIMIT);
719 TX_STATUS_FAIL(FIFO_UNDERRUN);
720 TX_STATUS_FAIL(DRAIN_FLOW);
721 TX_STATUS_FAIL(RFKILL_FLUSH);
722 TX_STATUS_FAIL(LIFE_EXPIRE);
723 TX_STATUS_FAIL(DEST_PS);
724 TX_STATUS_FAIL(HOST_ABORTED);
725 TX_STATUS_FAIL(BT_RETRY);
726 TX_STATUS_FAIL(STA_INVALID);
727 TX_STATUS_FAIL(FRAG_DROPPED);
728 TX_STATUS_FAIL(TID_DISABLE);
729 TX_STATUS_FAIL(FIFO_FLUSHED);
730 TX_STATUS_FAIL(INSUFFICIENT_CF_POLL);
731 TX_STATUS_FAIL(PASSIVE_NO_RX);
732 TX_STATUS_FAIL(NO_BEACON_ON_RADAR);
733 }
734
735 return "UNKNOWN";
736
737 #undef TX_STATUS_FAIL
738 #undef TX_STATUS_POSTPONE
739 }
740 #endif /* CONFIG_IWLWIFI_DEBUG */
741
742 static void iwlagn_count_agg_tx_err_status(struct iwl_priv *priv, u16 status)
743 {
744 status &= AGG_TX_STATUS_MSK;
745
746 switch (status) {
747 case AGG_TX_STATE_UNDERRUN_MSK:
748 priv->reply_agg_tx_stats.underrun++;
749 break;
750 case AGG_TX_STATE_BT_PRIO_MSK:
751 priv->reply_agg_tx_stats.bt_prio++;
752 break;
753 case AGG_TX_STATE_FEW_BYTES_MSK:
754 priv->reply_agg_tx_stats.few_bytes++;
755 break;
756 case AGG_TX_STATE_ABORT_MSK:
757 priv->reply_agg_tx_stats.abort++;
758 break;
759 case AGG_TX_STATE_LAST_SENT_TTL_MSK:
760 priv->reply_agg_tx_stats.last_sent_ttl++;
761 break;
762 case AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK:
763 priv->reply_agg_tx_stats.last_sent_try++;
764 break;
765 case AGG_TX_STATE_LAST_SENT_BT_KILL_MSK:
766 priv->reply_agg_tx_stats.last_sent_bt_kill++;
767 break;
768 case AGG_TX_STATE_SCD_QUERY_MSK:
769 priv->reply_agg_tx_stats.scd_query++;
770 break;
771 case AGG_TX_STATE_TEST_BAD_CRC32_MSK:
772 priv->reply_agg_tx_stats.bad_crc32++;
773 break;
774 case AGG_TX_STATE_RESPONSE_MSK:
775 priv->reply_agg_tx_stats.response++;
776 break;
777 case AGG_TX_STATE_DUMP_TX_MSK:
778 priv->reply_agg_tx_stats.dump_tx++;
779 break;
780 case AGG_TX_STATE_DELAY_TX_MSK:
781 priv->reply_agg_tx_stats.delay_tx++;
782 break;
783 default:
784 priv->reply_agg_tx_stats.unknown++;
785 break;
786 }
787 }
788
789 static void iwl_rx_reply_tx_agg(struct iwl_priv *priv,
790 struct iwlagn_tx_resp *tx_resp)
791 {
792 struct agg_tx_status *frame_status = &tx_resp->status;
793 int tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
794 IWLAGN_TX_RES_TID_POS;
795 int sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
796 IWLAGN_TX_RES_RA_POS;
797 struct iwl_ht_agg *agg = &priv->tid_data[sta_id][tid].agg;
798 u32 status = le16_to_cpu(tx_resp->status.status);
799 int i;
800
801 WARN_ON(tid == IWL_TID_NON_QOS);
802
803 if (agg->wait_for_ba)
804 IWL_DEBUG_TX_REPLY(priv,
805 "got tx response w/o block-ack\n");
806
807 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
808 agg->wait_for_ba = (tx_resp->frame_count > 1);
809
810 /*
811 * If the BT kill count is non-zero, we'll get this
812 * notification again.
813 */
814 if (tx_resp->bt_kill_count && tx_resp->frame_count == 1 &&
815 cfg(priv)->bt_params &&
816 cfg(priv)->bt_params->advanced_bt_coexist) {
817 IWL_DEBUG_COEX(priv, "receive reply tx w/ bt_kill\n");
818 }
819
820 if (tx_resp->frame_count == 1)
821 return;
822
823 /* Construct bit-map of pending frames within Tx window */
824 for (i = 0; i < tx_resp->frame_count; i++) {
825 u16 fstatus = le16_to_cpu(frame_status[i].status);
826
827 if (status & AGG_TX_STATUS_MSK)
828 iwlagn_count_agg_tx_err_status(priv, fstatus);
829
830 if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
831 AGG_TX_STATE_ABORT_MSK))
832 continue;
833
834 IWL_DEBUG_TX_REPLY(priv, "status %s (0x%08x), "
835 "try-count (0x%08x)\n",
836 iwl_get_agg_tx_fail_reason(fstatus),
837 fstatus & AGG_TX_STATUS_MSK,
838 fstatus & AGG_TX_TRY_MSK);
839 }
840 }
841
842 #ifdef CONFIG_IWLWIFI_DEBUG
843 #define AGG_TX_STATE_FAIL(x) case AGG_TX_STATE_ ## x: return #x
844
845 const char *iwl_get_agg_tx_fail_reason(u16 status)
846 {
847 status &= AGG_TX_STATUS_MSK;
848 switch (status) {
849 case AGG_TX_STATE_TRANSMITTED:
850 return "SUCCESS";
851 AGG_TX_STATE_FAIL(UNDERRUN_MSK);
852 AGG_TX_STATE_FAIL(BT_PRIO_MSK);
853 AGG_TX_STATE_FAIL(FEW_BYTES_MSK);
854 AGG_TX_STATE_FAIL(ABORT_MSK);
855 AGG_TX_STATE_FAIL(LAST_SENT_TTL_MSK);
856 AGG_TX_STATE_FAIL(LAST_SENT_TRY_CNT_MSK);
857 AGG_TX_STATE_FAIL(LAST_SENT_BT_KILL_MSK);
858 AGG_TX_STATE_FAIL(SCD_QUERY_MSK);
859 AGG_TX_STATE_FAIL(TEST_BAD_CRC32_MSK);
860 AGG_TX_STATE_FAIL(RESPONSE_MSK);
861 AGG_TX_STATE_FAIL(DUMP_TX_MSK);
862 AGG_TX_STATE_FAIL(DELAY_TX_MSK);
863 }
864
865 return "UNKNOWN";
866 }
867 #endif /* CONFIG_IWLWIFI_DEBUG */
868
869 static inline u32 iwlagn_get_scd_ssn(struct iwlagn_tx_resp *tx_resp)
870 {
871 return le32_to_cpup((__le32 *)&tx_resp->status +
872 tx_resp->frame_count) & MAX_SN;
873 }
874
875 static void iwlagn_count_tx_err_status(struct iwl_priv *priv, u16 status)
876 {
877 status &= TX_STATUS_MSK;
878
879 switch (status) {
880 case TX_STATUS_POSTPONE_DELAY:
881 priv->reply_tx_stats.pp_delay++;
882 break;
883 case TX_STATUS_POSTPONE_FEW_BYTES:
884 priv->reply_tx_stats.pp_few_bytes++;
885 break;
886 case TX_STATUS_POSTPONE_BT_PRIO:
887 priv->reply_tx_stats.pp_bt_prio++;
888 break;
889 case TX_STATUS_POSTPONE_QUIET_PERIOD:
890 priv->reply_tx_stats.pp_quiet_period++;
891 break;
892 case TX_STATUS_POSTPONE_CALC_TTAK:
893 priv->reply_tx_stats.pp_calc_ttak++;
894 break;
895 case TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY:
896 priv->reply_tx_stats.int_crossed_retry++;
897 break;
898 case TX_STATUS_FAIL_SHORT_LIMIT:
899 priv->reply_tx_stats.short_limit++;
900 break;
901 case TX_STATUS_FAIL_LONG_LIMIT:
902 priv->reply_tx_stats.long_limit++;
903 break;
904 case TX_STATUS_FAIL_FIFO_UNDERRUN:
905 priv->reply_tx_stats.fifo_underrun++;
906 break;
907 case TX_STATUS_FAIL_DRAIN_FLOW:
908 priv->reply_tx_stats.drain_flow++;
909 break;
910 case TX_STATUS_FAIL_RFKILL_FLUSH:
911 priv->reply_tx_stats.rfkill_flush++;
912 break;
913 case TX_STATUS_FAIL_LIFE_EXPIRE:
914 priv->reply_tx_stats.life_expire++;
915 break;
916 case TX_STATUS_FAIL_DEST_PS:
917 priv->reply_tx_stats.dest_ps++;
918 break;
919 case TX_STATUS_FAIL_HOST_ABORTED:
920 priv->reply_tx_stats.host_abort++;
921 break;
922 case TX_STATUS_FAIL_BT_RETRY:
923 priv->reply_tx_stats.bt_retry++;
924 break;
925 case TX_STATUS_FAIL_STA_INVALID:
926 priv->reply_tx_stats.sta_invalid++;
927 break;
928 case TX_STATUS_FAIL_FRAG_DROPPED:
929 priv->reply_tx_stats.frag_drop++;
930 break;
931 case TX_STATUS_FAIL_TID_DISABLE:
932 priv->reply_tx_stats.tid_disable++;
933 break;
934 case TX_STATUS_FAIL_FIFO_FLUSHED:
935 priv->reply_tx_stats.fifo_flush++;
936 break;
937 case TX_STATUS_FAIL_INSUFFICIENT_CF_POLL:
938 priv->reply_tx_stats.insuff_cf_poll++;
939 break;
940 case TX_STATUS_FAIL_PASSIVE_NO_RX:
941 priv->reply_tx_stats.fail_hw_drop++;
942 break;
943 case TX_STATUS_FAIL_NO_BEACON_ON_RADAR:
944 priv->reply_tx_stats.sta_color_mismatch++;
945 break;
946 default:
947 priv->reply_tx_stats.unknown++;
948 break;
949 }
950 }
951
952 static void iwlagn_set_tx_status(struct iwl_priv *priv,
953 struct ieee80211_tx_info *info,
954 struct iwlagn_tx_resp *tx_resp,
955 bool is_agg)
956 {
957 u16 status = le16_to_cpu(tx_resp->status.status);
958
959 info->status.rates[0].count = tx_resp->failure_frame + 1;
960 if (is_agg)
961 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
962 info->flags |= iwl_tx_status_to_mac80211(status);
963 iwlagn_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
964 info);
965 if (!iwl_is_tx_success(status))
966 iwlagn_count_tx_err_status(priv, status);
967 }
968
969 static void iwl_check_abort_status(struct iwl_priv *priv,
970 u8 frame_count, u32 status)
971 {
972 if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) {
973 IWL_ERR(priv, "Tx flush command to flush out all frames\n");
974 if (!test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
975 queue_work(priv->workqueue, &priv->tx_flush);
976 }
977 }
978
979 int iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb,
980 struct iwl_device_cmd *cmd)
981 {
982 struct iwl_rx_packet *pkt = rxb_addr(rxb);
983 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
984 int txq_id = SEQ_TO_QUEUE(sequence);
985 int cmd_index __maybe_unused = SEQ_TO_INDEX(sequence);
986 struct iwlagn_tx_resp *tx_resp = (void *)pkt->data;
987 struct ieee80211_hdr *hdr;
988 u32 status = le16_to_cpu(tx_resp->status.status);
989 u16 ssn = iwlagn_get_scd_ssn(tx_resp);
990 int tid;
991 int sta_id;
992 int freed;
993 struct ieee80211_tx_info *info;
994 struct sk_buff_head skbs;
995 struct sk_buff *skb;
996 struct iwl_rxon_context *ctx;
997 bool is_agg = (txq_id >= IWLAGN_FIRST_AMPDU_QUEUE);
998
999 tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
1000 IWLAGN_TX_RES_TID_POS;
1001 sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
1002 IWLAGN_TX_RES_RA_POS;
1003
1004 spin_lock(&priv->sta_lock);
1005
1006 if (is_agg)
1007 iwl_rx_reply_tx_agg(priv, tx_resp);
1008
1009 __skb_queue_head_init(&skbs);
1010
1011 if (tx_resp->frame_count == 1) {
1012 u16 next_reclaimed = le16_to_cpu(tx_resp->seq_ctl);
1013 next_reclaimed = SEQ_TO_SN(next_reclaimed + 0x10);
1014
1015 if (is_agg) {
1016 /* If this is an aggregation queue, we can rely on the
1017 * ssn since the wifi sequence number corresponds to
1018 * the index in the TFD ring (%256).
1019 * The seq_ctl is the sequence control of the packet
1020 * to which this Tx response relates. But if there is a
1021 * hole in the bitmap of the BA we received, this Tx
1022 * response may allow to reclaim the hole and all the
1023 * subsequent packets that were already acked.
1024 * In that case, seq_ctl != ssn, and the next packet
1025 * to be reclaimed will be ssn and not seq_ctl.
1026 */
1027 next_reclaimed = ssn;
1028 }
1029
1030 if (tid != IWL_TID_NON_QOS) {
1031 priv->tid_data[sta_id][tid].next_reclaimed =
1032 next_reclaimed;
1033 IWL_DEBUG_TX_REPLY(priv, "Next reclaimed packet:%d",
1034 next_reclaimed);
1035 }
1036
1037 /*we can free until ssn % q.n_bd not inclusive */
1038 WARN_ON(iwl_trans_reclaim(trans(priv), sta_id, tid, txq_id,
1039 ssn, status, &skbs));
1040 iwlagn_check_ratid_empty(priv, sta_id, tid);
1041 freed = 0;
1042
1043 /* process frames */
1044 skb_queue_walk(&skbs, skb) {
1045 hdr = (struct ieee80211_hdr *)skb->data;
1046
1047 if (!ieee80211_is_data_qos(hdr->frame_control))
1048 priv->last_seq_ctl = tx_resp->seq_ctl;
1049
1050 info = IEEE80211_SKB_CB(skb);
1051 ctx = info->driver_data[0];
1052 kmem_cache_free(priv->tx_cmd_pool,
1053 (info->driver_data[1]));
1054
1055 memset(&info->status, 0, sizeof(info->status));
1056
1057 if (status == TX_STATUS_FAIL_PASSIVE_NO_RX &&
1058 iwl_is_associated_ctx(ctx) && ctx->vif &&
1059 ctx->vif->type == NL80211_IFTYPE_STATION) {
1060 ctx->last_tx_rejected = true;
1061 iwl_trans_stop_queue(trans(priv), txq_id,
1062 "Tx on passive channel");
1063
1064 IWL_DEBUG_TX_REPLY(priv,
1065 "TXQ %d status %s (0x%08x) "
1066 "rate_n_flags 0x%x retries %d\n",
1067 txq_id,
1068 iwl_get_tx_fail_reason(status),
1069 status,
1070 le32_to_cpu(tx_resp->rate_n_flags),
1071 tx_resp->failure_frame);
1072
1073 IWL_DEBUG_TX_REPLY(priv,
1074 "FrameCnt = %d, idx=%d\n",
1075 tx_resp->frame_count, cmd_index);
1076 }
1077
1078 /* check if BAR is needed */
1079 if (is_agg && !iwl_is_tx_success(status))
1080 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1081 iwlagn_set_tx_status(priv, IEEE80211_SKB_CB(skb),
1082 tx_resp, is_agg);
1083 if (!is_agg)
1084 iwlagn_non_agg_tx_status(priv, ctx, hdr->addr1);
1085
1086 freed++;
1087 }
1088
1089 WARN_ON(!is_agg && freed != 1);
1090 }
1091
1092 iwl_check_abort_status(priv, tx_resp->frame_count, status);
1093 spin_unlock(&priv->sta_lock);
1094
1095 while (!skb_queue_empty(&skbs)) {
1096 skb = __skb_dequeue(&skbs);
1097 ieee80211_tx_status(priv->hw, skb);
1098 }
1099
1100 return 0;
1101 }
1102
1103 /**
1104 * iwlagn_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
1105 *
1106 * Handles block-acknowledge notification from device, which reports success
1107 * of frames sent via aggregation.
1108 */
1109 int iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv,
1110 struct iwl_rx_cmd_buffer *rxb,
1111 struct iwl_device_cmd *cmd)
1112 {
1113 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1114 struct iwl_compressed_ba_resp *ba_resp = (void *)pkt->data;
1115 struct iwl_ht_agg *agg;
1116 struct sk_buff_head reclaimed_skbs;
1117 struct ieee80211_tx_info *info;
1118 struct ieee80211_hdr *hdr;
1119 struct sk_buff *skb;
1120 int sta_id;
1121 int tid;
1122 int freed;
1123
1124 /* "flow" corresponds to Tx queue */
1125 u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
1126
1127 /* "ssn" is start of block-ack Tx window, corresponds to index
1128 * (in Tx queue's circular buffer) of first TFD/frame in window */
1129 u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
1130
1131 if (scd_flow >= hw_params(priv).max_txq_num) {
1132 IWL_ERR(priv,
1133 "BUG_ON scd_flow is bigger than number of queues\n");
1134 return 0;
1135 }
1136
1137 sta_id = ba_resp->sta_id;
1138 tid = ba_resp->tid;
1139 agg = &priv->tid_data[sta_id][tid].agg;
1140
1141 spin_lock(&priv->sta_lock);
1142
1143 if (unlikely(!agg->wait_for_ba)) {
1144 if (unlikely(ba_resp->bitmap))
1145 IWL_ERR(priv, "Received BA when not expected\n");
1146 spin_unlock(&priv->sta_lock);
1147 return 0;
1148 }
1149
1150 __skb_queue_head_init(&reclaimed_skbs);
1151
1152 /* Release all TFDs before the SSN, i.e. all TFDs in front of
1153 * block-ack window (we assume that they've been successfully
1154 * transmitted ... if not, it's too late anyway). */
1155 if (iwl_trans_reclaim(trans(priv), sta_id, tid, scd_flow,
1156 ba_resp_scd_ssn, 0, &reclaimed_skbs)) {
1157 spin_unlock(&priv->sta_lock);
1158 return 0;
1159 }
1160
1161 IWL_DEBUG_TX_REPLY(priv, "REPLY_COMPRESSED_BA [%d] Received from %pM, "
1162 "sta_id = %d\n",
1163 agg->wait_for_ba,
1164 (u8 *) &ba_resp->sta_addr_lo32,
1165 ba_resp->sta_id);
1166 IWL_DEBUG_TX_REPLY(priv, "TID = %d, SeqCtl = %d, bitmap = 0x%llx, "
1167 "scd_flow = %d, scd_ssn = %d\n",
1168 ba_resp->tid, le16_to_cpu(ba_resp->seq_ctl),
1169 (unsigned long long)le64_to_cpu(ba_resp->bitmap),
1170 scd_flow, ba_resp_scd_ssn);
1171
1172 /* Mark that the expected block-ack response arrived */
1173 agg->wait_for_ba = false;
1174
1175 /* Sanity check values reported by uCode */
1176 if (ba_resp->txed_2_done > ba_resp->txed) {
1177 IWL_DEBUG_TX_REPLY(priv,
1178 "bogus sent(%d) and ack(%d) count\n",
1179 ba_resp->txed, ba_resp->txed_2_done);
1180 /*
1181 * set txed_2_done = txed,
1182 * so it won't impact rate scale
1183 */
1184 ba_resp->txed = ba_resp->txed_2_done;
1185 }
1186 IWL_DEBUG_HT(priv, "agg frames sent:%d, acked:%d\n",
1187 ba_resp->txed, ba_resp->txed_2_done);
1188
1189 priv->tid_data[sta_id][tid].next_reclaimed = ba_resp_scd_ssn;
1190
1191 iwlagn_check_ratid_empty(priv, sta_id, tid);
1192 freed = 0;
1193
1194 skb_queue_walk(&reclaimed_skbs, skb) {
1195 hdr = (struct ieee80211_hdr *)skb->data;
1196
1197 if (ieee80211_is_data_qos(hdr->frame_control))
1198 freed++;
1199 else
1200 WARN_ON_ONCE(1);
1201
1202 info = IEEE80211_SKB_CB(skb);
1203 kmem_cache_free(priv->tx_cmd_pool, (info->driver_data[1]));
1204
1205 if (freed == 1) {
1206 /* this is the first skb we deliver in this batch */
1207 /* put the rate scaling data there */
1208 info = IEEE80211_SKB_CB(skb);
1209 memset(&info->status, 0, sizeof(info->status));
1210 info->flags |= IEEE80211_TX_STAT_ACK;
1211 info->flags |= IEEE80211_TX_STAT_AMPDU;
1212 info->status.ampdu_ack_len = ba_resp->txed_2_done;
1213 info->status.ampdu_len = ba_resp->txed;
1214 iwlagn_hwrate_to_tx_control(priv, agg->rate_n_flags,
1215 info);
1216 }
1217 }
1218
1219 spin_unlock(&priv->sta_lock);
1220
1221 while (!skb_queue_empty(&reclaimed_skbs)) {
1222 skb = __skb_dequeue(&reclaimed_skbs);
1223 ieee80211_tx_status(priv->hw, skb);
1224 }
1225
1226 return 0;
1227 }
Linux kernel - Deliverables
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