1 /******************************************************************************
2 *
3 * GPL LICENSE SUMMARY
4 *
5 * Copyright(c) 2008 - 2011 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
iwlagn_tx_cmd_protection(struct iwl_priv * priv,struct ieee80211_tx_info * info,__le16 fc,__le32 * tx_flags)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 */
iwlagn_tx_cmd_build_basic(struct iwl_priv * priv,struct sk_buff * skb,struct iwl_tx_cmd * tx_cmd,struct ieee80211_tx_info * info,struct ieee80211_hdr * hdr,u8 sta_id)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
iwlagn_tx_cmd_build_rate(struct iwl_priv * priv,struct iwl_tx_cmd * tx_cmd,struct ieee80211_tx_info * info,__le16 fc)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->shrd->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
iwlagn_tx_cmd_build_hwcrypto(struct iwl_priv * priv,struct ieee80211_tx_info * info,struct iwl_tx_cmd * tx_cmd,struct sk_buff * skb_frag,int sta_id)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 int sta_id)
215 {
216 struct ieee80211_key_conf *keyconf = info->control.hw_key;
217
218 switch (keyconf->cipher) {
219 case WLAN_CIPHER_SUITE_CCMP:
220 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
221 memcpy(tx_cmd->key, keyconf->key, keyconf->keylen);
222 if (info->flags & IEEE80211_TX_CTL_AMPDU)
223 tx_cmd->tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
224 IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n");
225 break;
226
227 case WLAN_CIPHER_SUITE_TKIP:
228 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
229 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
230 IWL_DEBUG_TX(priv, "tx_cmd with tkip hwcrypto\n");
231 break;
232
233 case WLAN_CIPHER_SUITE_WEP104:
234 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
235 /* fall through */
236 case WLAN_CIPHER_SUITE_WEP40:
237 tx_cmd->sec_ctl |= (TX_CMD_SEC_WEP |
238 (keyconf->keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT);
239
240 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
241
242 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
243 "with key %d\n", keyconf->keyidx);
244 break;
245
246 default:
247 IWL_ERR(priv, "Unknown encode cipher %x\n", keyconf->cipher);
248 break;
249 }
250 }
251
252 /*
253 * start REPLY_TX command process
254 */
iwlagn_tx_skb(struct iwl_priv * priv,struct sk_buff * skb)255 int iwlagn_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
256 {
257 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
258 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
259 struct iwl_station_priv *sta_priv = NULL;
260 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
261 struct iwl_device_cmd *dev_cmd = NULL;
262 struct iwl_tx_cmd *tx_cmd;
263
264 __le16 fc;
265 u8 hdr_len;
266 u16 len, seq_number = 0;
267 u8 sta_id, tid = IWL_MAX_TID_COUNT;
268 unsigned long flags;
269 bool is_agg = false;
270
271 if (info->control.vif)
272 ctx = iwl_rxon_ctx_from_vif(info->control.vif);
273
274 spin_lock_irqsave(&priv->shrd->lock, flags);
275 if (iwl_is_rfkill(priv->shrd)) {
276 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
277 goto drop_unlock_priv;
278 }
279
280 fc = hdr->frame_control;
281
282 #ifdef CONFIG_IWLWIFI_DEBUG
283 if (ieee80211_is_auth(fc))
284 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
285 else if (ieee80211_is_assoc_req(fc))
286 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
287 else if (ieee80211_is_reassoc_req(fc))
288 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
289 #endif
290
291 if (unlikely(ieee80211_is_probe_resp(fc))) {
292 struct iwl_wipan_noa_data *noa_data =
293 rcu_dereference(priv->noa_data);
294
295 if (noa_data &&
296 pskb_expand_head(skb, 0, noa_data->length,
297 GFP_ATOMIC) == 0) {
298 memcpy(skb_put(skb, noa_data->length),
299 noa_data->data, noa_data->length);
300 hdr = (struct ieee80211_hdr *)skb->data;
301 }
302 }
303
304 hdr_len = ieee80211_hdrlen(fc);
305
306 /* For management frames use broadcast id to do not break aggregation */
307 if (!ieee80211_is_data(fc))
308 sta_id = ctx->bcast_sta_id;
309 else {
310 /* Find index into station table for destination station */
311 sta_id = iwl_sta_id_or_broadcast(priv, ctx, info->control.sta);
312 if (sta_id == IWL_INVALID_STATION) {
313 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
314 hdr->addr1);
315 goto drop_unlock_priv;
316 }
317 }
318
319 IWL_DEBUG_TX(priv, "station Id %d\n", sta_id);
320
321 if (info->control.sta)
322 sta_priv = (void *)info->control.sta->drv_priv;
323
324 if (sta_priv && sta_priv->asleep &&
325 (info->flags & IEEE80211_TX_CTL_POLL_RESPONSE)) {
326 /*
327 * This sends an asynchronous command to the device,
328 * but we can rely on it being processed before the
329 * next frame is processed -- and the next frame to
330 * this station is the one that will consume this
331 * counter.
332 * For now set the counter to just 1 since we do not
333 * support uAPSD yet.
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 /* irqs already disabled/saved above when locking priv->shrd->lock */
342 spin_lock(&priv->shrd->sta_lock);
343
344 dev_cmd = kmem_cache_alloc(priv->tx_cmd_pool, GFP_ATOMIC);
345
346 if (unlikely(!dev_cmd))
347 goto drop_unlock_sta;
348
349 memset(dev_cmd, 0, sizeof(*dev_cmd));
350 tx_cmd = (struct iwl_tx_cmd *) dev_cmd->payload;
351
352 /* Total # bytes to be transmitted */
353 len = (u16)skb->len;
354 tx_cmd->len = cpu_to_le16(len);
355
356 if (info->control.hw_key)
357 iwlagn_tx_cmd_build_hwcrypto(priv, info, tx_cmd, skb, sta_id);
358
359 /* TODO need this for burst mode later on */
360 iwlagn_tx_cmd_build_basic(priv, skb, tx_cmd, info, hdr, sta_id);
361 iwl_dbg_log_tx_data_frame(priv, len, hdr);
362
363 iwlagn_tx_cmd_build_rate(priv, tx_cmd, info, fc);
364
365 iwl_update_stats(priv, true, fc, len);
366
367 memset(&info->status, 0, sizeof(info->status));
368
369 info->driver_data[0] = ctx;
370 info->driver_data[1] = dev_cmd;
371
372 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
373 u8 *qc = NULL;
374 struct iwl_tid_data *tid_data;
375 qc = ieee80211_get_qos_ctl(hdr);
376 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
377 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
378 goto drop_unlock_sta;
379 tid_data = &priv->tid_data[sta_id][tid];
380
381 /* aggregation is on for this <sta,tid> */
382 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
383 tid_data->agg.state != IWL_AGG_ON) {
384 IWL_ERR(priv, "TX_CTL_AMPDU while not in AGG:"
385 " Tx flags = 0x%08x, agg.state = %d",
386 info->flags, tid_data->agg.state);
387 IWL_ERR(priv, "sta_id = %d, tid = %d seq_num = %d",
388 sta_id, tid, SEQ_TO_SN(tid_data->seq_number));
389 goto drop_unlock_sta;
390 }
391
392 /* We can receive packets from the stack in IWL_AGG_{ON,OFF}
393 * only. Check this here.
394 */
395 if (WARN_ONCE(tid_data->agg.state != IWL_AGG_ON &&
396 tid_data->agg.state != IWL_AGG_OFF,
397 "Tx while agg.state = %d", tid_data->agg.state))
398 goto drop_unlock_sta;
399
400 seq_number = tid_data->seq_number;
401 seq_number &= IEEE80211_SCTL_SEQ;
402 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
403 hdr->seq_ctrl |= cpu_to_le16(seq_number);
404 seq_number += 0x10;
405 }
406
407 /* Copy MAC header from skb into command buffer */
408 memcpy(tx_cmd->hdr, hdr, hdr_len);
409
410 if (iwl_trans_tx(trans(priv), skb, dev_cmd, ctx->ctxid, sta_id, tid))
411 goto drop_unlock_sta;
412
413 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc) &&
414 !ieee80211_has_morefrags(fc))
415 priv->tid_data[sta_id][tid].seq_number = seq_number;
416
417 spin_unlock(&priv->shrd->sta_lock);
418 spin_unlock_irqrestore(&priv->shrd->lock, flags);
419
420 /*
421 * Avoid atomic ops if it isn't an associated client.
422 * Also, if this is a packet for aggregation, don't
423 * increase the counter because the ucode will stop
424 * aggregation queues when their respective station
425 * goes to sleep.
426 */
427 if (sta_priv && sta_priv->client && !is_agg)
428 atomic_inc(&sta_priv->pending_frames);
429
430 return 0;
431
432 drop_unlock_sta:
433 if (dev_cmd)
434 kmem_cache_free(priv->tx_cmd_pool, dev_cmd);
435 spin_unlock(&priv->shrd->sta_lock);
436 drop_unlock_priv:
437 spin_unlock_irqrestore(&priv->shrd->lock, flags);
438 return -1;
439 }
440
iwlagn_tx_agg_stop(struct iwl_priv * priv,struct ieee80211_vif * vif,struct ieee80211_sta * sta,u16 tid)441 int iwlagn_tx_agg_stop(struct iwl_priv *priv, struct ieee80211_vif *vif,
442 struct ieee80211_sta *sta, u16 tid)
443 {
444 struct iwl_tid_data *tid_data;
445 unsigned long flags;
446 int sta_id;
447
448 sta_id = iwl_sta_id(sta);
449
450 if (sta_id == IWL_INVALID_STATION) {
451 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
452 return -ENXIO;
453 }
454
455 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
456
457 tid_data = &priv->tid_data[sta_id][tid];
458
459 switch (priv->tid_data[sta_id][tid].agg.state) {
460 case IWL_EMPTYING_HW_QUEUE_ADDBA:
461 /*
462 * This can happen if the peer stops aggregation
463 * again before we've had a chance to drain the
464 * queue we selected previously, i.e. before the
465 * session was really started completely.
466 */
467 IWL_DEBUG_HT(priv, "AGG stop before setup done\n");
468 goto turn_off;
469 case IWL_AGG_ON:
470 break;
471 default:
472 IWL_WARN(priv, "Stopping AGG while state not ON "
473 "or starting for %d on %d (%d)\n", sta_id, tid,
474 priv->tid_data[sta_id][tid].agg.state);
475 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
476 return 0;
477 }
478
479 tid_data->agg.ssn = SEQ_TO_SN(tid_data->seq_number);
480
481 /* There are still packets for this RA / TID in the HW */
482 if (tid_data->agg.ssn != tid_data->next_reclaimed) {
483 IWL_DEBUG_TX_QUEUES(priv, "Can't proceed: ssn %d, "
484 "next_recl = %d",
485 tid_data->agg.ssn,
486 tid_data->next_reclaimed);
487 priv->tid_data[sta_id][tid].agg.state =
488 IWL_EMPTYING_HW_QUEUE_DELBA;
489 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
490 return 0;
491 }
492
493 IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d",
494 tid_data->agg.ssn);
495 turn_off:
496 priv->tid_data[sta_id][tid].agg.state = IWL_AGG_OFF;
497
498 /* do not restore/save irqs */
499 spin_unlock(&priv->shrd->sta_lock);
500 spin_lock(&priv->shrd->lock);
501
502 iwl_trans_tx_agg_disable(trans(priv), sta_id, tid);
503
504 spin_unlock_irqrestore(&priv->shrd->lock, flags);
505
506 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
507
508 return 0;
509 }
510
iwlagn_tx_agg_start(struct iwl_priv * priv,struct ieee80211_vif * vif,struct ieee80211_sta * sta,u16 tid,u16 * ssn)511 int iwlagn_tx_agg_start(struct iwl_priv *priv, struct ieee80211_vif *vif,
512 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
513 {
514 struct iwl_tid_data *tid_data;
515 unsigned long flags;
516 int sta_id;
517 int ret;
518
519 IWL_DEBUG_HT(priv, "TX AGG request on ra = %pM tid = %d\n",
520 sta->addr, tid);
521
522 sta_id = iwl_sta_id(sta);
523 if (sta_id == IWL_INVALID_STATION) {
524 IWL_ERR(priv, "Start AGG on invalid station\n");
525 return -ENXIO;
526 }
527 if (unlikely(tid >= IWL_MAX_TID_COUNT))
528 return -EINVAL;
529
530 if (priv->tid_data[sta_id][tid].agg.state != IWL_AGG_OFF) {
531 IWL_ERR(priv, "Start AGG when state is not IWL_AGG_OFF !\n");
532 return -ENXIO;
533 }
534
535 ret = iwl_sta_tx_modify_enable_tid(priv, sta_id, tid);
536 if (ret)
537 return ret;
538
539 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
540
541 tid_data = &priv->tid_data[sta_id][tid];
542 tid_data->agg.ssn = SEQ_TO_SN(tid_data->seq_number);
543
544 *ssn = tid_data->agg.ssn;
545
546 ret = iwl_trans_tx_agg_alloc(trans(priv), sta_id, tid);
547 if (ret) {
548 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
549 return ret;
550 }
551
552 if (*ssn == tid_data->next_reclaimed) {
553 IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d",
554 tid_data->agg.ssn);
555 tid_data->agg.state = IWL_AGG_ON;
556 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
557 } else {
558 IWL_DEBUG_TX_QUEUES(priv, "Can't proceed: ssn %d, "
559 "next_reclaimed = %d",
560 tid_data->agg.ssn,
561 tid_data->next_reclaimed);
562 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA;
563 }
564
565 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
566
567 return ret;
568 }
569
iwlagn_tx_agg_oper(struct iwl_priv * priv,struct ieee80211_vif * vif,struct ieee80211_sta * sta,u16 tid,u8 buf_size)570 int iwlagn_tx_agg_oper(struct iwl_priv *priv, struct ieee80211_vif *vif,
571 struct ieee80211_sta *sta, u16 tid, u8 buf_size)
572 {
573 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
574 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
575 unsigned long flags;
576 u16 ssn;
577
578 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
579
580 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
581 ssn = priv->tid_data[sta_priv->sta_id][tid].agg.ssn;
582 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
583
584 iwl_trans_tx_agg_setup(trans(priv), ctx->ctxid, sta_priv->sta_id, tid,
585 buf_size, ssn);
586
587 /*
588 * If the limit is 0, then it wasn't initialised yet,
589 * use the default. We can do that since we take the
590 * minimum below, and we don't want to go above our
591 * default due to hardware restrictions.
592 */
593 if (sta_priv->max_agg_bufsize == 0)
594 sta_priv->max_agg_bufsize =
595 LINK_QUAL_AGG_FRAME_LIMIT_DEF;
596
597 /*
598 * Even though in theory the peer could have different
599 * aggregation reorder buffer sizes for different sessions,
600 * our ucode doesn't allow for that and has a global limit
601 * for each station. Therefore, use the minimum of all the
602 * aggregation sessions and our default value.
603 */
604 sta_priv->max_agg_bufsize =
605 min(sta_priv->max_agg_bufsize, buf_size);
606
607 if (cfg(priv)->ht_params &&
608 cfg(priv)->ht_params->use_rts_for_aggregation) {
609 /*
610 * switch to RTS/CTS if it is the prefer protection
611 * method for HT traffic
612 */
613
614 sta_priv->lq_sta.lq.general_params.flags |=
615 LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
616 }
617 priv->agg_tids_count++;
618 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
619 priv->agg_tids_count);
620
621 sta_priv->lq_sta.lq.agg_params.agg_frame_cnt_limit =
622 sta_priv->max_agg_bufsize;
623
624 IWL_DEBUG_HT(priv, "Tx aggregation enabled on ra = %pM tid = %d\n",
625 sta->addr, tid);
626
627 return iwl_send_lq_cmd(priv, ctx,
628 &sta_priv->lq_sta.lq, CMD_ASYNC, false);
629 }
630
iwlagn_check_ratid_empty(struct iwl_priv * priv,int sta_id,u8 tid)631 static void iwlagn_check_ratid_empty(struct iwl_priv *priv, int sta_id, u8 tid)
632 {
633 struct iwl_tid_data *tid_data = &priv->tid_data[sta_id][tid];
634 enum iwl_rxon_context_id ctx;
635 struct ieee80211_vif *vif;
636 u8 *addr;
637
638 lockdep_assert_held(&priv->shrd->sta_lock);
639
640 addr = priv->stations[sta_id].sta.sta.addr;
641 ctx = priv->stations[sta_id].ctxid;
642 vif = priv->contexts[ctx].vif;
643
644 switch (priv->tid_data[sta_id][tid].agg.state) {
645 case IWL_EMPTYING_HW_QUEUE_DELBA:
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 DELBA flow ssn = next_recl ="
650 " %d", tid_data->next_reclaimed);
651 iwl_trans_tx_agg_disable(trans(priv), sta_id, tid);
652 tid_data->agg.state = IWL_AGG_OFF;
653 ieee80211_stop_tx_ba_cb_irqsafe(vif, addr, tid);
654 }
655 break;
656 case IWL_EMPTYING_HW_QUEUE_ADDBA:
657 /* There are no packets for this RA / TID in the HW any more */
658 if (tid_data->agg.ssn == tid_data->next_reclaimed) {
659 IWL_DEBUG_TX_QUEUES(priv,
660 "Can continue ADDBA flow ssn = next_recl ="
661 " %d", tid_data->next_reclaimed);
662 tid_data->agg.state = IWL_AGG_ON;
663 ieee80211_start_tx_ba_cb_irqsafe(vif, addr, tid);
664 }
665 break;
666 default:
667 break;
668 }
669 }
670
iwlagn_non_agg_tx_status(struct iwl_priv * priv,struct iwl_rxon_context * ctx,const u8 * addr1)671 static void iwlagn_non_agg_tx_status(struct iwl_priv *priv,
672 struct iwl_rxon_context *ctx,
673 const u8 *addr1)
674 {
675 struct ieee80211_sta *sta;
676 struct iwl_station_priv *sta_priv;
677
678 rcu_read_lock();
679 sta = ieee80211_find_sta(ctx->vif, addr1);
680 if (sta) {
681 sta_priv = (void *)sta->drv_priv;
682 /* avoid atomic ops if this isn't a client */
683 if (sta_priv->client &&
684 atomic_dec_return(&sta_priv->pending_frames) == 0)
685 ieee80211_sta_block_awake(priv->hw, sta, false);
686 }
687 rcu_read_unlock();
688 }
689
690 /**
691 * translate ucode response to mac80211 tx status control values
692 */
iwlagn_hwrate_to_tx_control(struct iwl_priv * priv,u32 rate_n_flags,struct ieee80211_tx_info * info)693 static void iwlagn_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
694 struct ieee80211_tx_info *info)
695 {
696 struct ieee80211_tx_rate *r = &info->control.rates[0];
697
698 info->antenna_sel_tx =
699 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
700 if (rate_n_flags & RATE_MCS_HT_MSK)
701 r->flags |= IEEE80211_TX_RC_MCS;
702 if (rate_n_flags & RATE_MCS_GF_MSK)
703 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
704 if (rate_n_flags & RATE_MCS_HT40_MSK)
705 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
706 if (rate_n_flags & RATE_MCS_DUP_MSK)
707 r->flags |= IEEE80211_TX_RC_DUP_DATA;
708 if (rate_n_flags & RATE_MCS_SGI_MSK)
709 r->flags |= IEEE80211_TX_RC_SHORT_GI;
710 r->idx = iwlagn_hwrate_to_mac80211_idx(rate_n_flags, info->band);
711 }
712
713 #ifdef CONFIG_IWLWIFI_DEBUG
iwl_get_tx_fail_reason(u32 status)714 const char *iwl_get_tx_fail_reason(u32 status)
715 {
716 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
717 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
718
719 switch (status & TX_STATUS_MSK) {
720 case TX_STATUS_SUCCESS:
721 return "SUCCESS";
722 TX_STATUS_POSTPONE(DELAY);
723 TX_STATUS_POSTPONE(FEW_BYTES);
724 TX_STATUS_POSTPONE(BT_PRIO);
725 TX_STATUS_POSTPONE(QUIET_PERIOD);
726 TX_STATUS_POSTPONE(CALC_TTAK);
727 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
728 TX_STATUS_FAIL(SHORT_LIMIT);
729 TX_STATUS_FAIL(LONG_LIMIT);
730 TX_STATUS_FAIL(FIFO_UNDERRUN);
731 TX_STATUS_FAIL(DRAIN_FLOW);
732 TX_STATUS_FAIL(RFKILL_FLUSH);
733 TX_STATUS_FAIL(LIFE_EXPIRE);
734 TX_STATUS_FAIL(DEST_PS);
735 TX_STATUS_FAIL(HOST_ABORTED);
736 TX_STATUS_FAIL(BT_RETRY);
737 TX_STATUS_FAIL(STA_INVALID);
738 TX_STATUS_FAIL(FRAG_DROPPED);
739 TX_STATUS_FAIL(TID_DISABLE);
740 TX_STATUS_FAIL(FIFO_FLUSHED);
741 TX_STATUS_FAIL(INSUFFICIENT_CF_POLL);
742 TX_STATUS_FAIL(PASSIVE_NO_RX);
743 TX_STATUS_FAIL(NO_BEACON_ON_RADAR);
744 }
745
746 return "UNKNOWN";
747
748 #undef TX_STATUS_FAIL
749 #undef TX_STATUS_POSTPONE
750 }
751 #endif /* CONFIG_IWLWIFI_DEBUG */
752
iwlagn_count_agg_tx_err_status(struct iwl_priv * priv,u16 status)753 static void iwlagn_count_agg_tx_err_status(struct iwl_priv *priv, u16 status)
754 {
755 status &= AGG_TX_STATUS_MSK;
756
757 switch (status) {
758 case AGG_TX_STATE_UNDERRUN_MSK:
759 priv->reply_agg_tx_stats.underrun++;
760 break;
761 case AGG_TX_STATE_BT_PRIO_MSK:
762 priv->reply_agg_tx_stats.bt_prio++;
763 break;
764 case AGG_TX_STATE_FEW_BYTES_MSK:
765 priv->reply_agg_tx_stats.few_bytes++;
766 break;
767 case AGG_TX_STATE_ABORT_MSK:
768 priv->reply_agg_tx_stats.abort++;
769 break;
770 case AGG_TX_STATE_LAST_SENT_TTL_MSK:
771 priv->reply_agg_tx_stats.last_sent_ttl++;
772 break;
773 case AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK:
774 priv->reply_agg_tx_stats.last_sent_try++;
775 break;
776 case AGG_TX_STATE_LAST_SENT_BT_KILL_MSK:
777 priv->reply_agg_tx_stats.last_sent_bt_kill++;
778 break;
779 case AGG_TX_STATE_SCD_QUERY_MSK:
780 priv->reply_agg_tx_stats.scd_query++;
781 break;
782 case AGG_TX_STATE_TEST_BAD_CRC32_MSK:
783 priv->reply_agg_tx_stats.bad_crc32++;
784 break;
785 case AGG_TX_STATE_RESPONSE_MSK:
786 priv->reply_agg_tx_stats.response++;
787 break;
788 case AGG_TX_STATE_DUMP_TX_MSK:
789 priv->reply_agg_tx_stats.dump_tx++;
790 break;
791 case AGG_TX_STATE_DELAY_TX_MSK:
792 priv->reply_agg_tx_stats.delay_tx++;
793 break;
794 default:
795 priv->reply_agg_tx_stats.unknown++;
796 break;
797 }
798 }
799
iwl_rx_reply_tx_agg(struct iwl_priv * priv,struct iwlagn_tx_resp * tx_resp)800 static void iwl_rx_reply_tx_agg(struct iwl_priv *priv,
801 struct iwlagn_tx_resp *tx_resp)
802 {
803 struct agg_tx_status *frame_status = &tx_resp->status;
804 int tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
805 IWLAGN_TX_RES_TID_POS;
806 int sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
807 IWLAGN_TX_RES_RA_POS;
808 struct iwl_ht_agg *agg = &priv->tid_data[sta_id][tid].agg;
809 u32 status = le16_to_cpu(tx_resp->status.status);
810 int i;
811
812 WARN_ON(tid == IWL_TID_NON_QOS);
813
814 if (agg->wait_for_ba)
815 IWL_DEBUG_TX_REPLY(priv,
816 "got tx response w/o block-ack\n");
817
818 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
819 agg->wait_for_ba = (tx_resp->frame_count > 1);
820
821 /*
822 * If the BT kill count is non-zero, we'll get this
823 * notification again.
824 */
825 if (tx_resp->bt_kill_count && tx_resp->frame_count == 1 &&
826 cfg(priv)->bt_params &&
827 cfg(priv)->bt_params->advanced_bt_coexist) {
828 IWL_DEBUG_COEX(priv, "receive reply tx w/ bt_kill\n");
829 }
830
831 if (tx_resp->frame_count == 1)
832 return;
833
834 /* Construct bit-map of pending frames within Tx window */
835 for (i = 0; i < tx_resp->frame_count; i++) {
836 u16 fstatus = le16_to_cpu(frame_status[i].status);
837
838 if (status & AGG_TX_STATUS_MSK)
839 iwlagn_count_agg_tx_err_status(priv, fstatus);
840
841 if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
842 AGG_TX_STATE_ABORT_MSK))
843 continue;
844
845 IWL_DEBUG_TX_REPLY(priv, "status %s (0x%08x), "
846 "try-count (0x%08x)\n",
847 iwl_get_agg_tx_fail_reason(fstatus),
848 fstatus & AGG_TX_STATUS_MSK,
849 fstatus & AGG_TX_TRY_MSK);
850 }
851 }
852
853 #ifdef CONFIG_IWLWIFI_DEBUG
854 #define AGG_TX_STATE_FAIL(x) case AGG_TX_STATE_ ## x: return #x
855
iwl_get_agg_tx_fail_reason(u16 status)856 const char *iwl_get_agg_tx_fail_reason(u16 status)
857 {
858 status &= AGG_TX_STATUS_MSK;
859 switch (status) {
860 case AGG_TX_STATE_TRANSMITTED:
861 return "SUCCESS";
862 AGG_TX_STATE_FAIL(UNDERRUN_MSK);
863 AGG_TX_STATE_FAIL(BT_PRIO_MSK);
864 AGG_TX_STATE_FAIL(FEW_BYTES_MSK);
865 AGG_TX_STATE_FAIL(ABORT_MSK);
866 AGG_TX_STATE_FAIL(LAST_SENT_TTL_MSK);
867 AGG_TX_STATE_FAIL(LAST_SENT_TRY_CNT_MSK);
868 AGG_TX_STATE_FAIL(LAST_SENT_BT_KILL_MSK);
869 AGG_TX_STATE_FAIL(SCD_QUERY_MSK);
870 AGG_TX_STATE_FAIL(TEST_BAD_CRC32_MSK);
871 AGG_TX_STATE_FAIL(RESPONSE_MSK);
872 AGG_TX_STATE_FAIL(DUMP_TX_MSK);
873 AGG_TX_STATE_FAIL(DELAY_TX_MSK);
874 }
875
876 return "UNKNOWN";
877 }
878 #endif /* CONFIG_IWLWIFI_DEBUG */
879
iwlagn_get_scd_ssn(struct iwlagn_tx_resp * tx_resp)880 static inline u32 iwlagn_get_scd_ssn(struct iwlagn_tx_resp *tx_resp)
881 {
882 return le32_to_cpup((__le32 *)&tx_resp->status +
883 tx_resp->frame_count) & MAX_SN;
884 }
885
iwlagn_count_tx_err_status(struct iwl_priv * priv,u16 status)886 static void iwlagn_count_tx_err_status(struct iwl_priv *priv, u16 status)
887 {
888 status &= TX_STATUS_MSK;
889
890 switch (status) {
891 case TX_STATUS_POSTPONE_DELAY:
892 priv->reply_tx_stats.pp_delay++;
893 break;
894 case TX_STATUS_POSTPONE_FEW_BYTES:
895 priv->reply_tx_stats.pp_few_bytes++;
896 break;
897 case TX_STATUS_POSTPONE_BT_PRIO:
898 priv->reply_tx_stats.pp_bt_prio++;
899 break;
900 case TX_STATUS_POSTPONE_QUIET_PERIOD:
901 priv->reply_tx_stats.pp_quiet_period++;
902 break;
903 case TX_STATUS_POSTPONE_CALC_TTAK:
904 priv->reply_tx_stats.pp_calc_ttak++;
905 break;
906 case TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY:
907 priv->reply_tx_stats.int_crossed_retry++;
908 break;
909 case TX_STATUS_FAIL_SHORT_LIMIT:
910 priv->reply_tx_stats.short_limit++;
911 break;
912 case TX_STATUS_FAIL_LONG_LIMIT:
913 priv->reply_tx_stats.long_limit++;
914 break;
915 case TX_STATUS_FAIL_FIFO_UNDERRUN:
916 priv->reply_tx_stats.fifo_underrun++;
917 break;
918 case TX_STATUS_FAIL_DRAIN_FLOW:
919 priv->reply_tx_stats.drain_flow++;
920 break;
921 case TX_STATUS_FAIL_RFKILL_FLUSH:
922 priv->reply_tx_stats.rfkill_flush++;
923 break;
924 case TX_STATUS_FAIL_LIFE_EXPIRE:
925 priv->reply_tx_stats.life_expire++;
926 break;
927 case TX_STATUS_FAIL_DEST_PS:
928 priv->reply_tx_stats.dest_ps++;
929 break;
930 case TX_STATUS_FAIL_HOST_ABORTED:
931 priv->reply_tx_stats.host_abort++;
932 break;
933 case TX_STATUS_FAIL_BT_RETRY:
934 priv->reply_tx_stats.bt_retry++;
935 break;
936 case TX_STATUS_FAIL_STA_INVALID:
937 priv->reply_tx_stats.sta_invalid++;
938 break;
939 case TX_STATUS_FAIL_FRAG_DROPPED:
940 priv->reply_tx_stats.frag_drop++;
941 break;
942 case TX_STATUS_FAIL_TID_DISABLE:
943 priv->reply_tx_stats.tid_disable++;
944 break;
945 case TX_STATUS_FAIL_FIFO_FLUSHED:
946 priv->reply_tx_stats.fifo_flush++;
947 break;
948 case TX_STATUS_FAIL_INSUFFICIENT_CF_POLL:
949 priv->reply_tx_stats.insuff_cf_poll++;
950 break;
951 case TX_STATUS_FAIL_PASSIVE_NO_RX:
952 priv->reply_tx_stats.fail_hw_drop++;
953 break;
954 case TX_STATUS_FAIL_NO_BEACON_ON_RADAR:
955 priv->reply_tx_stats.sta_color_mismatch++;
956 break;
957 default:
958 priv->reply_tx_stats.unknown++;
959 break;
960 }
961 }
962
iwlagn_set_tx_status(struct iwl_priv * priv,struct ieee80211_tx_info * info,struct iwlagn_tx_resp * tx_resp,bool is_agg)963 static void iwlagn_set_tx_status(struct iwl_priv *priv,
964 struct ieee80211_tx_info *info,
965 struct iwlagn_tx_resp *tx_resp,
966 bool is_agg)
967 {
968 u16 status = le16_to_cpu(tx_resp->status.status);
969
970 info->status.rates[0].count = tx_resp->failure_frame + 1;
971 if (is_agg)
972 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
973 info->flags |= iwl_tx_status_to_mac80211(status);
974 iwlagn_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
975 info);
976 if (!iwl_is_tx_success(status))
977 iwlagn_count_tx_err_status(priv, status);
978 }
979
iwl_check_abort_status(struct iwl_priv * priv,u8 frame_count,u32 status)980 static void iwl_check_abort_status(struct iwl_priv *priv,
981 u8 frame_count, u32 status)
982 {
983 if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) {
984 IWL_ERR(priv, "Tx flush command to flush out all frames\n");
985 if (!test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
986 queue_work(priv->shrd->workqueue, &priv->tx_flush);
987 }
988 }
989
iwlagn_rx_reply_tx(struct iwl_priv * priv,struct iwl_rx_mem_buffer * rxb,struct iwl_device_cmd * cmd)990 int iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb,
991 struct iwl_device_cmd *cmd)
992 {
993 struct iwl_rx_packet *pkt = rxb_addr(rxb);
994 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
995 int txq_id = SEQ_TO_QUEUE(sequence);
996 int cmd_index __maybe_unused = SEQ_TO_INDEX(sequence);
997 struct iwlagn_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
998 struct ieee80211_hdr *hdr;
999 u32 status = le16_to_cpu(tx_resp->status.status);
1000 u16 ssn = iwlagn_get_scd_ssn(tx_resp);
1001 int tid;
1002 int sta_id;
1003 int freed;
1004 struct ieee80211_tx_info *info;
1005 unsigned long flags;
1006 struct sk_buff_head skbs;
1007 struct sk_buff *skb;
1008 struct iwl_rxon_context *ctx;
1009 bool is_agg = (txq_id >= IWLAGN_FIRST_AMPDU_QUEUE);
1010
1011 tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
1012 IWLAGN_TX_RES_TID_POS;
1013 sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
1014 IWLAGN_TX_RES_RA_POS;
1015
1016 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1017
1018 if (is_agg)
1019 iwl_rx_reply_tx_agg(priv, tx_resp);
1020
1021 if (tx_resp->frame_count == 1) {
1022 u16 next_reclaimed = le16_to_cpu(tx_resp->seq_ctl);
1023 next_reclaimed = SEQ_TO_SN(next_reclaimed + 0x10);
1024
1025 if (is_agg) {
1026 /* If this is an aggregation queue, we can rely on the
1027 * ssn since the wifi sequence number corresponds to
1028 * the index in the TFD ring (%256).
1029 * The seq_ctl is the sequence control of the packet
1030 * to which this Tx response relates. But if there is a
1031 * hole in the bitmap of the BA we received, this Tx
1032 * response may allow to reclaim the hole and all the
1033 * subsequent packets that were already acked.
1034 * In that case, seq_ctl != ssn, and the next packet
1035 * to be reclaimed will be ssn and not seq_ctl.
1036 */
1037 next_reclaimed = ssn;
1038 }
1039
1040 __skb_queue_head_init(&skbs);
1041
1042 if (tid != IWL_TID_NON_QOS) {
1043 priv->tid_data[sta_id][tid].next_reclaimed =
1044 next_reclaimed;
1045 IWL_DEBUG_TX_REPLY(priv, "Next reclaimed packet:%d",
1046 next_reclaimed);
1047 }
1048
1049 /*we can free until ssn % q.n_bd not inclusive */
1050 WARN_ON(iwl_trans_reclaim(trans(priv), sta_id, tid, txq_id,
1051 ssn, status, &skbs));
1052 iwlagn_check_ratid_empty(priv, sta_id, tid);
1053 freed = 0;
1054 while (!skb_queue_empty(&skbs)) {
1055 skb = __skb_dequeue(&skbs);
1056 hdr = (struct ieee80211_hdr *)skb->data;
1057
1058 if (!ieee80211_is_data_qos(hdr->frame_control))
1059 priv->last_seq_ctl = tx_resp->seq_ctl;
1060
1061 info = IEEE80211_SKB_CB(skb);
1062 ctx = info->driver_data[0];
1063 kmem_cache_free(priv->tx_cmd_pool,
1064 (info->driver_data[1]));
1065
1066 memset(&info->status, 0, sizeof(info->status));
1067
1068 if (status == TX_STATUS_FAIL_PASSIVE_NO_RX &&
1069 iwl_is_associated_ctx(ctx) && ctx->vif &&
1070 ctx->vif->type == NL80211_IFTYPE_STATION) {
1071 ctx->last_tx_rejected = true;
1072 iwl_trans_stop_queue(trans(priv), txq_id,
1073 "Tx on passive channel");
1074
1075 IWL_DEBUG_TX_REPLY(priv,
1076 "TXQ %d status %s (0x%08x) "
1077 "rate_n_flags 0x%x retries %d\n",
1078 txq_id,
1079 iwl_get_tx_fail_reason(status),
1080 status,
1081 le32_to_cpu(tx_resp->rate_n_flags),
1082 tx_resp->failure_frame);
1083
1084 IWL_DEBUG_TX_REPLY(priv,
1085 "FrameCnt = %d, idx=%d\n",
1086 tx_resp->frame_count, cmd_index);
1087 }
1088
1089 /* check if BAR is needed */
1090 if (is_agg && !iwl_is_tx_success(status))
1091 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1092 iwlagn_set_tx_status(priv, IEEE80211_SKB_CB(skb),
1093 tx_resp, is_agg);
1094 if (!is_agg)
1095 iwlagn_non_agg_tx_status(priv, ctx, hdr->addr1);
1096
1097 ieee80211_tx_status_irqsafe(priv->hw, skb);
1098
1099 freed++;
1100 }
1101
1102 WARN_ON(!is_agg && freed != 1);
1103 }
1104
1105 iwl_check_abort_status(priv, tx_resp->frame_count, status);
1106 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1107 return 0;
1108 }
1109
1110 /**
1111 * iwlagn_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
1112 *
1113 * Handles block-acknowledge notification from device, which reports success
1114 * of frames sent via aggregation.
1115 */
iwlagn_rx_reply_compressed_ba(struct iwl_priv * priv,struct iwl_rx_mem_buffer * rxb,struct iwl_device_cmd * cmd)1116 int iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv,
1117 struct iwl_rx_mem_buffer *rxb,
1118 struct iwl_device_cmd *cmd)
1119 {
1120 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1121 struct iwl_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba;
1122 struct iwl_ht_agg *agg;
1123 struct sk_buff_head reclaimed_skbs;
1124 struct ieee80211_tx_info *info;
1125 struct ieee80211_hdr *hdr;
1126 struct sk_buff *skb;
1127 unsigned long flags;
1128 int sta_id;
1129 int tid;
1130 int freed;
1131
1132 /* "flow" corresponds to Tx queue */
1133 u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
1134
1135 /* "ssn" is start of block-ack Tx window, corresponds to index
1136 * (in Tx queue's circular buffer) of first TFD/frame in window */
1137 u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
1138
1139 if (scd_flow >= hw_params(priv).max_txq_num) {
1140 IWL_ERR(priv,
1141 "BUG_ON scd_flow is bigger than number of queues\n");
1142 return 0;
1143 }
1144
1145 sta_id = ba_resp->sta_id;
1146 tid = ba_resp->tid;
1147 agg = &priv->tid_data[sta_id][tid].agg;
1148
1149 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1150
1151 if (unlikely(!agg->wait_for_ba)) {
1152 if (unlikely(ba_resp->bitmap))
1153 IWL_ERR(priv, "Received BA when not expected\n");
1154 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1155 return 0;
1156 }
1157
1158 __skb_queue_head_init(&reclaimed_skbs);
1159
1160 /* Release all TFDs before the SSN, i.e. all TFDs in front of
1161 * block-ack window (we assume that they've been successfully
1162 * transmitted ... if not, it's too late anyway). */
1163 if (iwl_trans_reclaim(trans(priv), sta_id, tid, scd_flow,
1164 ba_resp_scd_ssn, 0, &reclaimed_skbs)) {
1165 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1166 return 0;
1167 }
1168
1169 IWL_DEBUG_TX_REPLY(priv, "REPLY_COMPRESSED_BA [%d] Received from %pM, "
1170 "sta_id = %d\n",
1171 agg->wait_for_ba,
1172 (u8 *) &ba_resp->sta_addr_lo32,
1173 ba_resp->sta_id);
1174 IWL_DEBUG_TX_REPLY(priv, "TID = %d, SeqCtl = %d, bitmap = 0x%llx, "
1175 "scd_flow = %d, scd_ssn = %d\n",
1176 ba_resp->tid, le16_to_cpu(ba_resp->seq_ctl),
1177 (unsigned long long)le64_to_cpu(ba_resp->bitmap),
1178 scd_flow, ba_resp_scd_ssn);
1179
1180 /* Mark that the expected block-ack response arrived */
1181 agg->wait_for_ba = false;
1182
1183 /* Sanity check values reported by uCode */
1184 if (ba_resp->txed_2_done > ba_resp->txed) {
1185 IWL_DEBUG_TX_REPLY(priv,
1186 "bogus sent(%d) and ack(%d) count\n",
1187 ba_resp->txed, ba_resp->txed_2_done);
1188 /*
1189 * set txed_2_done = txed,
1190 * so it won't impact rate scale
1191 */
1192 ba_resp->txed = ba_resp->txed_2_done;
1193 }
1194 IWL_DEBUG_HT(priv, "agg frames sent:%d, acked:%d\n",
1195 ba_resp->txed, ba_resp->txed_2_done);
1196
1197 priv->tid_data[sta_id][tid].next_reclaimed = ba_resp_scd_ssn;
1198
1199 iwlagn_check_ratid_empty(priv, sta_id, tid);
1200 freed = 0;
1201 while (!skb_queue_empty(&reclaimed_skbs)) {
1202
1203 skb = __skb_dequeue(&reclaimed_skbs);
1204 hdr = (struct ieee80211_hdr *)skb->data;
1205
1206 if (ieee80211_is_data_qos(hdr->frame_control))
1207 freed++;
1208 else
1209 WARN_ON_ONCE(1);
1210
1211 info = IEEE80211_SKB_CB(skb);
1212 kmem_cache_free(priv->tx_cmd_pool, (info->driver_data[1]));
1213
1214 if (freed == 1) {
1215 /* this is the first skb we deliver in this batch */
1216 /* put the rate scaling data there */
1217 info = IEEE80211_SKB_CB(skb);
1218 memset(&info->status, 0, sizeof(info->status));
1219 info->flags |= IEEE80211_TX_STAT_ACK;
1220 info->flags |= IEEE80211_TX_STAT_AMPDU;
1221 info->status.ampdu_ack_len = ba_resp->txed_2_done;
1222 info->status.ampdu_len = ba_resp->txed;
1223 iwlagn_hwrate_to_tx_control(priv, agg->rate_n_flags,
1224 info);
1225 }
1226
1227 ieee80211_tx_status_irqsafe(priv->hw, skb);
1228 }
1229
1230 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1231 return 0;
1232 }
1233