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iwlwifi: mvm: fix default disabled aggs in sta
[deliverable/linux.git] / drivers / net / wireless / iwlwifi / mvm / tx.c
1 /******************************************************************************
2 *
3 * This file is provided under a dual BSD/GPLv2 license. When using or
4 * redistributing this file, you may do so under either license.
5 *
6 * GPL LICENSE SUMMARY
7 *
8 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
9 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of version 2 of the GNU General Public License as
13 * published by the Free Software Foundation.
14 *
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
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22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
23 * USA
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25 * The full GNU General Public License is included in this distribution
26 * in the file called COPYING.
27 *
28 * Contact Information:
29 * Intel Linux Wireless <ilw@linux.intel.com>
30 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
31 *
32 * BSD LICENSE
33 *
34 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
35 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
36 * All rights reserved.
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46 * the documentation and/or other materials provided with the
47 * distribution.
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50 * from this software without specific prior written permission.
51 *
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55 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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58 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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62 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
63 *
64 *****************************************************************************/
65 #include <linux/ieee80211.h>
66 #include <linux/etherdevice.h>
67
68 #include "iwl-trans.h"
69 #include "iwl-eeprom-parse.h"
70 #include "mvm.h"
71 #include "sta.h"
72
73 static void
74 iwl_mvm_bar_check_trigger(struct iwl_mvm *mvm, const u8 *addr,
75 u16 tid, u16 ssn)
76 {
77 struct iwl_fw_dbg_trigger_tlv *trig;
78 struct iwl_fw_dbg_trigger_ba *ba_trig;
79
80 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
81 return;
82
83 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
84 ba_trig = (void *)trig->data;
85
86 if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig))
87 return;
88
89 if (!(le16_to_cpu(ba_trig->tx_bar) & BIT(tid)))
90 return;
91
92 iwl_mvm_fw_dbg_collect_trig(mvm, trig,
93 "BAR sent to %pM, tid %d, ssn %d",
94 addr, tid, ssn);
95 }
96
97 /*
98 * Sets most of the Tx cmd's fields
99 */
100 void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb,
101 struct iwl_tx_cmd *tx_cmd,
102 struct ieee80211_tx_info *info, u8 sta_id)
103 {
104 struct ieee80211_hdr *hdr = (void *)skb->data;
105 __le16 fc = hdr->frame_control;
106 u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags);
107 u32 len = skb->len + FCS_LEN;
108 u8 ac;
109
110 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
111 tx_flags |= TX_CMD_FLG_ACK;
112 else
113 tx_flags &= ~TX_CMD_FLG_ACK;
114
115 if (ieee80211_is_probe_resp(fc))
116 tx_flags |= TX_CMD_FLG_TSF;
117
118 if (ieee80211_has_morefrags(fc))
119 tx_flags |= TX_CMD_FLG_MORE_FRAG;
120
121 if (ieee80211_is_data_qos(fc)) {
122 u8 *qc = ieee80211_get_qos_ctl(hdr);
123 tx_cmd->tid_tspec = qc[0] & 0xf;
124 tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
125 } else if (ieee80211_is_back_req(fc)) {
126 struct ieee80211_bar *bar = (void *)skb->data;
127 u16 control = le16_to_cpu(bar->control);
128 u16 ssn = le16_to_cpu(bar->start_seq_num);
129
130 tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR;
131 tx_cmd->tid_tspec = (control &
132 IEEE80211_BAR_CTRL_TID_INFO_MASK) >>
133 IEEE80211_BAR_CTRL_TID_INFO_SHIFT;
134 WARN_ON_ONCE(tx_cmd->tid_tspec >= IWL_MAX_TID_COUNT);
135 iwl_mvm_bar_check_trigger(mvm, bar->ra, tx_cmd->tid_tspec,
136 ssn);
137 } else {
138 tx_cmd->tid_tspec = IWL_TID_NON_QOS;
139 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
140 tx_flags |= TX_CMD_FLG_SEQ_CTL;
141 else
142 tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
143 }
144
145 /* Default to 0 (BE) when tid_spec is set to IWL_TID_NON_QOS */
146 if (tx_cmd->tid_tspec < IWL_MAX_TID_COUNT)
147 ac = tid_to_mac80211_ac[tx_cmd->tid_tspec];
148 else
149 ac = tid_to_mac80211_ac[0];
150
151 tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) <<
152 TX_CMD_FLG_BT_PRIO_POS;
153
154 if (ieee80211_is_mgmt(fc)) {
155 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
156 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_ASSOC);
157 else if (ieee80211_is_action(fc))
158 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
159 else
160 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
161
162 /* The spec allows Action frames in A-MPDU, we don't support
163 * it
164 */
165 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU);
166 } else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) {
167 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
168 } else {
169 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
170 }
171
172 if (ieee80211_is_data(fc) && len > mvm->rts_threshold &&
173 !is_multicast_ether_addr(ieee80211_get_DA(hdr)))
174 tx_flags |= TX_CMD_FLG_PROT_REQUIRE;
175
176 if (fw_has_capa(&mvm->fw->ucode_capa,
177 IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT) &&
178 ieee80211_action_contains_tpc(skb))
179 tx_flags |= TX_CMD_FLG_WRITE_TX_POWER;
180
181 tx_cmd->tx_flags = cpu_to_le32(tx_flags);
182 /* Total # bytes to be transmitted */
183 tx_cmd->len = cpu_to_le16((u16)skb->len);
184 tx_cmd->next_frame_len = 0;
185 tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
186 tx_cmd->sta_id = sta_id;
187 }
188
189 /*
190 * Sets the fields in the Tx cmd that are rate related
191 */
192 void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd,
193 struct ieee80211_tx_info *info,
194 struct ieee80211_sta *sta, __le16 fc)
195 {
196 u32 rate_flags;
197 int rate_idx;
198 u8 rate_plcp;
199
200 /* Set retry limit on RTS packets */
201 tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT;
202
203 /* Set retry limit on DATA packets and Probe Responses*/
204 if (ieee80211_is_probe_resp(fc)) {
205 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT;
206 tx_cmd->rts_retry_limit =
207 min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit);
208 } else if (ieee80211_is_back_req(fc)) {
209 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT;
210 } else {
211 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY;
212 }
213
214 /*
215 * for data packets, rate info comes from the table inside the fw. This
216 * table is controlled by LINK_QUALITY commands
217 */
218
219 if (ieee80211_is_data(fc) && sta) {
220 tx_cmd->initial_rate_index = 0;
221 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE);
222 return;
223 } else if (ieee80211_is_back_req(fc)) {
224 tx_cmd->tx_flags |=
225 cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR);
226 }
227
228 /* HT rate doesn't make sense for a non data frame */
229 WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS,
230 "Got an HT rate (flags:0x%x/mcs:%d) for a non data frame (fc:0x%x)\n",
231 info->control.rates[0].flags,
232 info->control.rates[0].idx,
233 le16_to_cpu(fc));
234
235 rate_idx = info->control.rates[0].idx;
236 /* if the rate isn't a well known legacy rate, take the lowest one */
237 if (rate_idx < 0 || rate_idx > IWL_RATE_COUNT_LEGACY)
238 rate_idx = rate_lowest_index(
239 &mvm->nvm_data->bands[info->band], sta);
240
241 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
242 if (info->band == IEEE80211_BAND_5GHZ)
243 rate_idx += IWL_FIRST_OFDM_RATE;
244
245 /* For 2.4 GHZ band, check that there is no need to remap */
246 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
247
248 /* Get PLCP rate for tx_cmd->rate_n_flags */
249 rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(rate_idx);
250
251 mvm->mgmt_last_antenna_idx =
252 iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm),
253 mvm->mgmt_last_antenna_idx);
254
255 if (info->band == IEEE80211_BAND_2GHZ &&
256 !iwl_mvm_bt_coex_is_shared_ant_avail(mvm))
257 rate_flags = mvm->cfg->non_shared_ant << RATE_MCS_ANT_POS;
258 else
259 rate_flags =
260 BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS;
261
262 /* Set CCK flag as needed */
263 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
264 rate_flags |= RATE_MCS_CCK_MSK;
265
266 /* Set the rate in the TX cmd */
267 tx_cmd->rate_n_flags = cpu_to_le32((u32)rate_plcp | rate_flags);
268 }
269
270 /*
271 * Sets the fields in the Tx cmd that are crypto related
272 */
273 static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm,
274 struct ieee80211_tx_info *info,
275 struct iwl_tx_cmd *tx_cmd,
276 struct sk_buff *skb_frag,
277 int hdrlen)
278 {
279 struct ieee80211_key_conf *keyconf = info->control.hw_key;
280 u8 *crypto_hdr = skb_frag->data + hdrlen;
281 u64 pn;
282
283 switch (keyconf->cipher) {
284 case WLAN_CIPHER_SUITE_CCMP:
285 case WLAN_CIPHER_SUITE_CCMP_256:
286 iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd);
287 pn = atomic64_inc_return(&keyconf->tx_pn);
288 crypto_hdr[0] = pn;
289 crypto_hdr[2] = 0;
290 crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6);
291 crypto_hdr[1] = pn >> 8;
292 crypto_hdr[4] = pn >> 16;
293 crypto_hdr[5] = pn >> 24;
294 crypto_hdr[6] = pn >> 32;
295 crypto_hdr[7] = pn >> 40;
296 break;
297
298 case WLAN_CIPHER_SUITE_TKIP:
299 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
300 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
301 break;
302
303 case WLAN_CIPHER_SUITE_WEP104:
304 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
305 /* fall through */
306 case WLAN_CIPHER_SUITE_WEP40:
307 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP |
308 ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) &
309 TX_CMD_SEC_WEP_KEY_IDX_MSK);
310
311 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
312 break;
313 default:
314 tx_cmd->sec_ctl |= TX_CMD_SEC_EXT;
315 }
316 }
317
318 /*
319 * Allocates and sets the Tx cmd the driver data pointers in the skb
320 */
321 static struct iwl_device_cmd *
322 iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb,
323 int hdrlen, struct ieee80211_sta *sta, u8 sta_id)
324 {
325 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
326 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
327 struct iwl_device_cmd *dev_cmd;
328 struct iwl_tx_cmd *tx_cmd;
329
330 dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans);
331
332 if (unlikely(!dev_cmd))
333 return NULL;
334
335 memset(dev_cmd, 0, sizeof(*dev_cmd));
336 dev_cmd->hdr.cmd = TX_CMD;
337 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
338
339 if (info->control.hw_key)
340 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen);
341
342 iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id);
343
344 iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control);
345
346 memset(&info->status, 0, sizeof(info->status));
347
348 info->driver_data[0] = NULL;
349 info->driver_data[1] = dev_cmd;
350
351 return dev_cmd;
352 }
353
354 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb)
355 {
356 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
357 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
358 struct iwl_device_cmd *dev_cmd;
359 struct iwl_tx_cmd *tx_cmd;
360 u8 sta_id;
361 int hdrlen = ieee80211_hdrlen(hdr->frame_control);
362
363 if (WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU))
364 return -1;
365
366 if (WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM &&
367 (!info->control.vif ||
368 info->hw_queue != info->control.vif->cab_queue)))
369 return -1;
370
371 /*
372 * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets that can be used
373 * in 2 different types of vifs, P2P & STATION. P2P uses the offchannel
374 * queue. STATION (HS2.0) uses the auxiliary context of the FW,
375 * and hence needs to be sent on the aux queue
376 */
377 if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
378 info->control.vif->type == NL80211_IFTYPE_STATION)
379 IEEE80211_SKB_CB(skb)->hw_queue = mvm->aux_queue;
380
381 /*
382 * If the interface on which the frame is sent is the P2P_DEVICE
383 * or an AP/GO interface use the broadcast station associated
384 * with it; otherwise if the interface is a managed interface
385 * use the AP station associated with it for multicast traffic
386 * (this is not possible for unicast packets as a TLDS discovery
387 * response are sent without a station entry); otherwise use the
388 * AUX station.
389 */
390 sta_id = mvm->aux_sta.sta_id;
391 if (info->control.vif) {
392 struct iwl_mvm_vif *mvmvif =
393 iwl_mvm_vif_from_mac80211(info->control.vif);
394
395 if (info->control.vif->type == NL80211_IFTYPE_P2P_DEVICE ||
396 info->control.vif->type == NL80211_IFTYPE_AP)
397 sta_id = mvmvif->bcast_sta.sta_id;
398 else if (info->control.vif->type == NL80211_IFTYPE_STATION &&
399 is_multicast_ether_addr(hdr->addr1)) {
400 u8 ap_sta_id = ACCESS_ONCE(mvmvif->ap_sta_id);
401
402 if (ap_sta_id != IWL_MVM_STATION_COUNT)
403 sta_id = ap_sta_id;
404 }
405 }
406
407 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, info->hw_queue);
408
409 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, hdrlen, NULL, sta_id);
410 if (!dev_cmd)
411 return -1;
412
413 /* From now on, we cannot access info->control */
414 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
415
416 /* Copy MAC header from skb into command buffer */
417 memcpy(tx_cmd->hdr, hdr, hdrlen);
418
419 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, info->hw_queue)) {
420 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
421 return -1;
422 }
423
424 return 0;
425 }
426
427 /*
428 * Sets the fields in the Tx cmd that are crypto related
429 */
430 int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb,
431 struct ieee80211_sta *sta)
432 {
433 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
434 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
435 struct iwl_mvm_sta *mvmsta;
436 struct iwl_device_cmd *dev_cmd;
437 struct iwl_tx_cmd *tx_cmd;
438 __le16 fc;
439 u16 seq_number = 0;
440 u8 tid = IWL_MAX_TID_COUNT;
441 u8 txq_id = info->hw_queue;
442 bool is_data_qos = false, is_ampdu = false;
443 int hdrlen;
444
445 mvmsta = iwl_mvm_sta_from_mac80211(sta);
446 fc = hdr->frame_control;
447 hdrlen = ieee80211_hdrlen(fc);
448
449 if (WARN_ON_ONCE(!mvmsta))
450 return -1;
451
452 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
453 return -1;
454
455 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, hdrlen, sta, mvmsta->sta_id);
456 if (!dev_cmd)
457 goto drop;
458
459 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
460 /* From now on, we cannot access info->control */
461
462 /*
463 * we handle that entirely ourselves -- for uAPSD the firmware
464 * will always send a notification, and for PS-Poll responses
465 * we'll notify mac80211 when getting frame status
466 */
467 info->flags &= ~IEEE80211_TX_STATUS_EOSP;
468
469 spin_lock(&mvmsta->lock);
470
471 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
472 u8 *qc = NULL;
473 qc = ieee80211_get_qos_ctl(hdr);
474 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
475 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
476 goto drop_unlock_sta;
477
478 seq_number = mvmsta->tid_data[tid].seq_number;
479 seq_number &= IEEE80211_SCTL_SEQ;
480 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
481 hdr->seq_ctrl |= cpu_to_le16(seq_number);
482 is_data_qos = true;
483 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU;
484 }
485
486 /* Copy MAC header from skb into command buffer */
487 memcpy(tx_cmd->hdr, hdr, hdrlen);
488
489 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
490
491 if (sta->tdls) {
492 /* default to TID 0 for non-QoS packets */
493 u8 tdls_tid = tid == IWL_MAX_TID_COUNT ? 0 : tid;
494
495 txq_id = mvmsta->hw_queue[tid_to_mac80211_ac[tdls_tid]];
496 }
497
498 if (is_ampdu) {
499 if (WARN_ON_ONCE(mvmsta->tid_data[tid].state != IWL_AGG_ON))
500 goto drop_unlock_sta;
501 txq_id = mvmsta->tid_data[tid].txq_id;
502 }
503
504 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id,
505 tid, txq_id, IEEE80211_SEQ_TO_SN(seq_number));
506
507 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id))
508 goto drop_unlock_sta;
509
510 if (is_data_qos && !ieee80211_has_morefrags(fc))
511 mvmsta->tid_data[tid].seq_number = seq_number + 0x10;
512
513 spin_unlock(&mvmsta->lock);
514
515 if (txq_id < mvm->first_agg_queue)
516 atomic_inc(&mvm->pending_frames[mvmsta->sta_id]);
517
518 return 0;
519
520 drop_unlock_sta:
521 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
522 spin_unlock(&mvmsta->lock);
523 drop:
524 return -1;
525 }
526
527 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm,
528 struct ieee80211_sta *sta, u8 tid)
529 {
530 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
531 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
532 struct ieee80211_vif *vif = mvmsta->vif;
533
534 lockdep_assert_held(&mvmsta->lock);
535
536 if ((tid_data->state == IWL_AGG_ON ||
537 tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) &&
538 iwl_mvm_tid_queued(tid_data) == 0) {
539 /*
540 * Now that this aggregation queue is empty tell mac80211 so it
541 * knows we no longer have frames buffered for the station on
542 * this TID (for the TIM bitmap calculation.)
543 */
544 ieee80211_sta_set_buffered(sta, tid, false);
545 }
546
547 if (tid_data->ssn != tid_data->next_reclaimed)
548 return;
549
550 switch (tid_data->state) {
551 case IWL_EMPTYING_HW_QUEUE_ADDBA:
552 IWL_DEBUG_TX_QUEUES(mvm,
553 "Can continue addBA flow ssn = next_recl = %d\n",
554 tid_data->next_reclaimed);
555 tid_data->state = IWL_AGG_STARTING;
556 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
557 break;
558
559 case IWL_EMPTYING_HW_QUEUE_DELBA:
560 IWL_DEBUG_TX_QUEUES(mvm,
561 "Can continue DELBA flow ssn = next_recl = %d\n",
562 tid_data->next_reclaimed);
563 iwl_mvm_disable_txq(mvm, tid_data->txq_id, CMD_ASYNC);
564 tid_data->state = IWL_AGG_OFF;
565 /*
566 * we can't hold the mutex - but since we are after a sequence
567 * point (call to iwl_mvm_disable_txq(), so we don't even need
568 * a memory barrier.
569 */
570 mvm->queue_to_mac80211[tid_data->txq_id] =
571 IWL_INVALID_MAC80211_QUEUE;
572 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
573 break;
574
575 default:
576 break;
577 }
578 }
579
580 #ifdef CONFIG_IWLWIFI_DEBUG
581 const char *iwl_mvm_get_tx_fail_reason(u32 status)
582 {
583 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
584 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
585
586 switch (status & TX_STATUS_MSK) {
587 case TX_STATUS_SUCCESS:
588 return "SUCCESS";
589 TX_STATUS_POSTPONE(DELAY);
590 TX_STATUS_POSTPONE(FEW_BYTES);
591 TX_STATUS_POSTPONE(BT_PRIO);
592 TX_STATUS_POSTPONE(QUIET_PERIOD);
593 TX_STATUS_POSTPONE(CALC_TTAK);
594 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
595 TX_STATUS_FAIL(SHORT_LIMIT);
596 TX_STATUS_FAIL(LONG_LIMIT);
597 TX_STATUS_FAIL(UNDERRUN);
598 TX_STATUS_FAIL(DRAIN_FLOW);
599 TX_STATUS_FAIL(RFKILL_FLUSH);
600 TX_STATUS_FAIL(LIFE_EXPIRE);
601 TX_STATUS_FAIL(DEST_PS);
602 TX_STATUS_FAIL(HOST_ABORTED);
603 TX_STATUS_FAIL(BT_RETRY);
604 TX_STATUS_FAIL(STA_INVALID);
605 TX_STATUS_FAIL(FRAG_DROPPED);
606 TX_STATUS_FAIL(TID_DISABLE);
607 TX_STATUS_FAIL(FIFO_FLUSHED);
608 TX_STATUS_FAIL(SMALL_CF_POLL);
609 TX_STATUS_FAIL(FW_DROP);
610 TX_STATUS_FAIL(STA_COLOR_MISMATCH);
611 }
612
613 return "UNKNOWN";
614
615 #undef TX_STATUS_FAIL
616 #undef TX_STATUS_POSTPONE
617 }
618 #endif /* CONFIG_IWLWIFI_DEBUG */
619
620 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags,
621 enum ieee80211_band band,
622 struct ieee80211_tx_rate *r)
623 {
624 if (rate_n_flags & RATE_HT_MCS_GF_MSK)
625 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
626 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
627 case RATE_MCS_CHAN_WIDTH_20:
628 break;
629 case RATE_MCS_CHAN_WIDTH_40:
630 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
631 break;
632 case RATE_MCS_CHAN_WIDTH_80:
633 r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH;
634 break;
635 case RATE_MCS_CHAN_WIDTH_160:
636 r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH;
637 break;
638 }
639 if (rate_n_flags & RATE_MCS_SGI_MSK)
640 r->flags |= IEEE80211_TX_RC_SHORT_GI;
641 if (rate_n_flags & RATE_MCS_HT_MSK) {
642 r->flags |= IEEE80211_TX_RC_MCS;
643 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
644 } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
645 ieee80211_rate_set_vht(
646 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK,
647 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
648 RATE_VHT_MCS_NSS_POS) + 1);
649 r->flags |= IEEE80211_TX_RC_VHT_MCS;
650 } else {
651 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
652 band);
653 }
654 }
655
656 /**
657 * translate ucode response to mac80211 tx status control values
658 */
659 static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags,
660 struct ieee80211_tx_info *info)
661 {
662 struct ieee80211_tx_rate *r = &info->status.rates[0];
663
664 info->status.antenna =
665 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
666 iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r);
667 }
668
669 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm,
670 struct iwl_rx_packet *pkt)
671 {
672 struct ieee80211_sta *sta;
673 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
674 int txq_id = SEQ_TO_QUEUE(sequence);
675 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
676 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
677 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
678 u32 status = le16_to_cpu(tx_resp->status.status);
679 u16 ssn = iwl_mvm_get_scd_ssn(tx_resp);
680 struct iwl_mvm_sta *mvmsta;
681 struct sk_buff_head skbs;
682 u8 skb_freed = 0;
683 u16 next_reclaimed, seq_ctl;
684
685 __skb_queue_head_init(&skbs);
686
687 seq_ctl = le16_to_cpu(tx_resp->seq_ctl);
688
689 /* we can free until ssn % q.n_bd not inclusive */
690 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs);
691
692 while (!skb_queue_empty(&skbs)) {
693 struct sk_buff *skb = __skb_dequeue(&skbs);
694 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
695
696 skb_freed++;
697
698 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
699
700 memset(&info->status, 0, sizeof(info->status));
701
702 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
703
704 /* inform mac80211 about what happened with the frame */
705 switch (status & TX_STATUS_MSK) {
706 case TX_STATUS_SUCCESS:
707 case TX_STATUS_DIRECT_DONE:
708 info->flags |= IEEE80211_TX_STAT_ACK;
709 break;
710 case TX_STATUS_FAIL_DEST_PS:
711 info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
712 break;
713 default:
714 break;
715 }
716
717 info->status.rates[0].count = tx_resp->failure_frame + 1;
718 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate),
719 info);
720 info->status.status_driver_data[1] =
721 (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate);
722
723 /* Single frame failure in an AMPDU queue => send BAR */
724 if (txq_id >= mvm->first_agg_queue &&
725 !(info->flags & IEEE80211_TX_STAT_ACK) &&
726 !(info->flags & IEEE80211_TX_STAT_TX_FILTERED))
727 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
728
729 /* W/A FW bug: seq_ctl is wrong when the status isn't success */
730 if (status != TX_STATUS_SUCCESS) {
731 struct ieee80211_hdr *hdr = (void *)skb->data;
732 seq_ctl = le16_to_cpu(hdr->seq_ctrl);
733 }
734
735 /*
736 * TODO: this is not accurate if we are freeing more than one
737 * packet.
738 */
739 info->status.tx_time =
740 le16_to_cpu(tx_resp->wireless_media_time);
741 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1);
742 info->status.status_driver_data[0] =
743 (void *)(uintptr_t)tx_resp->reduced_tpc;
744
745 ieee80211_tx_status(mvm->hw, skb);
746 }
747
748 if (txq_id >= mvm->first_agg_queue) {
749 /* If this is an aggregation queue, we use the ssn since:
750 * ssn = wifi seq_num % 256.
751 * The seq_ctl is the sequence control of the packet to which
752 * this Tx response relates. But if there is a hole in the
753 * bitmap of the BA we received, this Tx response may allow to
754 * reclaim the hole and all the subsequent packets that were
755 * already acked. In that case, seq_ctl != ssn, and the next
756 * packet to be reclaimed will be ssn and not seq_ctl. In that
757 * case, several packets will be reclaimed even if
758 * frame_count = 1.
759 *
760 * The ssn is the index (% 256) of the latest packet that has
761 * treated (acked / dropped) + 1.
762 */
763 next_reclaimed = ssn;
764 } else {
765 /* The next packet to be reclaimed is the one after this one */
766 next_reclaimed = IEEE80211_SEQ_TO_SN(seq_ctl + 0x10);
767 }
768
769 IWL_DEBUG_TX_REPLY(mvm,
770 "TXQ %d status %s (0x%08x)\n",
771 txq_id, iwl_mvm_get_tx_fail_reason(status), status);
772
773 IWL_DEBUG_TX_REPLY(mvm,
774 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
775 le32_to_cpu(tx_resp->initial_rate),
776 tx_resp->failure_frame, SEQ_TO_INDEX(sequence),
777 ssn, next_reclaimed, seq_ctl);
778
779 rcu_read_lock();
780
781 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
782 /*
783 * sta can't be NULL otherwise it'd mean that the sta has been freed in
784 * the firmware while we still have packets for it in the Tx queues.
785 */
786 if (WARN_ON_ONCE(!sta))
787 goto out;
788
789 if (!IS_ERR(sta)) {
790 mvmsta = iwl_mvm_sta_from_mac80211(sta);
791
792 if (tid != IWL_TID_NON_QOS) {
793 struct iwl_mvm_tid_data *tid_data =
794 &mvmsta->tid_data[tid];
795
796 spin_lock_bh(&mvmsta->lock);
797 tid_data->next_reclaimed = next_reclaimed;
798 IWL_DEBUG_TX_REPLY(mvm, "Next reclaimed packet:%d\n",
799 next_reclaimed);
800 iwl_mvm_check_ratid_empty(mvm, sta, tid);
801 spin_unlock_bh(&mvmsta->lock);
802 }
803
804 if (mvmsta->next_status_eosp) {
805 mvmsta->next_status_eosp = false;
806 ieee80211_sta_eosp(sta);
807 }
808 } else {
809 mvmsta = NULL;
810 }
811
812 /*
813 * If the txq is not an AMPDU queue, there is no chance we freed
814 * several skbs. Check that out...
815 */
816 if (txq_id >= mvm->first_agg_queue)
817 goto out;
818
819 /* We can't free more than one frame at once on a shared queue */
820 WARN_ON(skb_freed > 1);
821
822 /* If we have still frames for this STA nothing to do here */
823 if (!atomic_sub_and_test(skb_freed, &mvm->pending_frames[sta_id]))
824 goto out;
825
826 if (mvmsta && mvmsta->vif->type == NL80211_IFTYPE_AP) {
827
828 /*
829 * If there are no pending frames for this STA and
830 * the tx to this station is not disabled, notify
831 * mac80211 that this station can now wake up in its
832 * STA table.
833 * If mvmsta is not NULL, sta is valid.
834 */
835
836 spin_lock_bh(&mvmsta->lock);
837
838 if (!mvmsta->disable_tx)
839 ieee80211_sta_block_awake(mvm->hw, sta, false);
840
841 spin_unlock_bh(&mvmsta->lock);
842 }
843
844 if (PTR_ERR(sta) == -EBUSY || PTR_ERR(sta) == -ENOENT) {
845 /*
846 * We are draining and this was the last packet - pre_rcu_remove
847 * has been called already. We might be after the
848 * synchronize_net already.
849 * Don't rely on iwl_mvm_rm_sta to see the empty Tx queues.
850 */
851 set_bit(sta_id, mvm->sta_drained);
852 schedule_work(&mvm->sta_drained_wk);
853 }
854
855 out:
856 rcu_read_unlock();
857 }
858
859 #ifdef CONFIG_IWLWIFI_DEBUG
860 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
861 static const char *iwl_get_agg_tx_status(u16 status)
862 {
863 switch (status & AGG_TX_STATE_STATUS_MSK) {
864 AGG_TX_STATE_(TRANSMITTED);
865 AGG_TX_STATE_(UNDERRUN);
866 AGG_TX_STATE_(BT_PRIO);
867 AGG_TX_STATE_(FEW_BYTES);
868 AGG_TX_STATE_(ABORT);
869 AGG_TX_STATE_(LAST_SENT_TTL);
870 AGG_TX_STATE_(LAST_SENT_TRY_CNT);
871 AGG_TX_STATE_(LAST_SENT_BT_KILL);
872 AGG_TX_STATE_(SCD_QUERY);
873 AGG_TX_STATE_(TEST_BAD_CRC32);
874 AGG_TX_STATE_(RESPONSE);
875 AGG_TX_STATE_(DUMP_TX);
876 AGG_TX_STATE_(DELAY_TX);
877 }
878
879 return "UNKNOWN";
880 }
881
882 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
883 struct iwl_rx_packet *pkt)
884 {
885 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
886 struct agg_tx_status *frame_status = &tx_resp->status;
887 int i;
888
889 for (i = 0; i < tx_resp->frame_count; i++) {
890 u16 fstatus = le16_to_cpu(frame_status[i].status);
891
892 IWL_DEBUG_TX_REPLY(mvm,
893 "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
894 iwl_get_agg_tx_status(fstatus),
895 fstatus & AGG_TX_STATE_STATUS_MSK,
896 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >>
897 AGG_TX_STATE_TRY_CNT_POS,
898 le16_to_cpu(frame_status[i].sequence));
899 }
900 }
901 #else
902 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
903 struct iwl_rx_packet *pkt)
904 {}
905 #endif /* CONFIG_IWLWIFI_DEBUG */
906
907 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm,
908 struct iwl_rx_packet *pkt)
909 {
910 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
911 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
912 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
913 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
914 struct ieee80211_sta *sta;
915
916 if (WARN_ON_ONCE(SEQ_TO_QUEUE(sequence) < mvm->first_agg_queue))
917 return;
918
919 if (WARN_ON_ONCE(tid == IWL_TID_NON_QOS))
920 return;
921
922 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt);
923
924 rcu_read_lock();
925
926 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
927
928 if (!WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
929 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
930 mvmsta->tid_data[tid].rate_n_flags =
931 le32_to_cpu(tx_resp->initial_rate);
932 mvmsta->tid_data[tid].reduced_tpc = tx_resp->reduced_tpc;
933 mvmsta->tid_data[tid].tx_time =
934 le16_to_cpu(tx_resp->wireless_media_time);
935 }
936
937 rcu_read_unlock();
938 }
939
940 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
941 {
942 struct iwl_rx_packet *pkt = rxb_addr(rxb);
943 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
944
945 if (tx_resp->frame_count == 1)
946 iwl_mvm_rx_tx_cmd_single(mvm, pkt);
947 else
948 iwl_mvm_rx_tx_cmd_agg(mvm, pkt);
949 }
950
951 static void iwl_mvm_tx_info_from_ba_notif(struct ieee80211_tx_info *info,
952 struct iwl_mvm_ba_notif *ba_notif,
953 struct iwl_mvm_tid_data *tid_data)
954 {
955 info->flags |= IEEE80211_TX_STAT_AMPDU;
956 info->status.ampdu_ack_len = ba_notif->txed_2_done;
957 info->status.ampdu_len = ba_notif->txed;
958 iwl_mvm_hwrate_to_tx_status(tid_data->rate_n_flags,
959 info);
960 /* TODO: not accounted if the whole A-MPDU failed */
961 info->status.tx_time = tid_data->tx_time;
962 info->status.status_driver_data[0] =
963 (void *)(uintptr_t)tid_data->reduced_tpc;
964 info->status.status_driver_data[1] =
965 (void *)(uintptr_t)tid_data->rate_n_flags;
966 }
967
968 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
969 {
970 struct iwl_rx_packet *pkt = rxb_addr(rxb);
971 struct iwl_mvm_ba_notif *ba_notif = (void *)pkt->data;
972 struct sk_buff_head reclaimed_skbs;
973 struct iwl_mvm_tid_data *tid_data;
974 struct ieee80211_sta *sta;
975 struct iwl_mvm_sta *mvmsta;
976 struct sk_buff *skb;
977 int sta_id, tid, freed;
978 /* "flow" corresponds to Tx queue */
979 u16 scd_flow = le16_to_cpu(ba_notif->scd_flow);
980 /* "ssn" is start of block-ack Tx window, corresponds to index
981 * (in Tx queue's circular buffer) of first TFD/frame in window */
982 u16 ba_resp_scd_ssn = le16_to_cpu(ba_notif->scd_ssn);
983
984 sta_id = ba_notif->sta_id;
985 tid = ba_notif->tid;
986
987 if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT ||
988 tid >= IWL_MAX_TID_COUNT,
989 "sta_id %d tid %d", sta_id, tid))
990 return;
991
992 rcu_read_lock();
993
994 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
995
996 /* Reclaiming frames for a station that has been deleted ? */
997 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
998 rcu_read_unlock();
999 return;
1000 }
1001
1002 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1003 tid_data = &mvmsta->tid_data[tid];
1004
1005 if (tid_data->txq_id != scd_flow) {
1006 IWL_ERR(mvm,
1007 "invalid BA notification: Q %d, tid %d, flow %d\n",
1008 tid_data->txq_id, tid, scd_flow);
1009 rcu_read_unlock();
1010 return;
1011 }
1012
1013 spin_lock_bh(&mvmsta->lock);
1014
1015 __skb_queue_head_init(&reclaimed_skbs);
1016
1017 /*
1018 * Release all TFDs before the SSN, i.e. all TFDs in front of
1019 * block-ack window (we assume that they've been successfully
1020 * transmitted ... if not, it's too late anyway).
1021 */
1022 iwl_trans_reclaim(mvm->trans, scd_flow, ba_resp_scd_ssn,
1023 &reclaimed_skbs);
1024
1025 IWL_DEBUG_TX_REPLY(mvm,
1026 "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
1027 (u8 *)&ba_notif->sta_addr_lo32,
1028 ba_notif->sta_id);
1029 IWL_DEBUG_TX_REPLY(mvm,
1030 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
1031 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl),
1032 (unsigned long long)le64_to_cpu(ba_notif->bitmap),
1033 scd_flow, ba_resp_scd_ssn, ba_notif->txed,
1034 ba_notif->txed_2_done);
1035
1036 tid_data->next_reclaimed = ba_resp_scd_ssn;
1037
1038 iwl_mvm_check_ratid_empty(mvm, sta, tid);
1039
1040 freed = 0;
1041
1042 skb_queue_walk(&reclaimed_skbs, skb) {
1043 struct ieee80211_hdr *hdr = (void *)skb->data;
1044 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1045
1046 if (ieee80211_is_data_qos(hdr->frame_control))
1047 freed++;
1048 else
1049 WARN_ON_ONCE(1);
1050
1051 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1052
1053 memset(&info->status, 0, sizeof(info->status));
1054 /* Packet was transmitted successfully, failures come as single
1055 * frames because before failing a frame the firmware transmits
1056 * it without aggregation at least once.
1057 */
1058 info->flags |= IEEE80211_TX_STAT_ACK;
1059
1060 /* this is the first skb we deliver in this batch */
1061 /* put the rate scaling data there */
1062 if (freed == 1)
1063 iwl_mvm_tx_info_from_ba_notif(info, ba_notif, tid_data);
1064 }
1065
1066 spin_unlock_bh(&mvmsta->lock);
1067
1068 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is
1069 * possible (i.e. first MPDU in the aggregation wasn't acked)
1070 * Still it's important to update RS about sent vs. acked.
1071 */
1072 if (skb_queue_empty(&reclaimed_skbs)) {
1073 struct ieee80211_tx_info ba_info = {};
1074 struct ieee80211_chanctx_conf *chanctx_conf = NULL;
1075
1076 if (mvmsta->vif)
1077 chanctx_conf =
1078 rcu_dereference(mvmsta->vif->chanctx_conf);
1079
1080 if (WARN_ON_ONCE(!chanctx_conf))
1081 goto out;
1082
1083 ba_info.band = chanctx_conf->def.chan->band;
1084 iwl_mvm_tx_info_from_ba_notif(&ba_info, ba_notif, tid_data);
1085
1086 IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n");
1087 iwl_mvm_rs_tx_status(mvm, sta, tid, &ba_info);
1088 }
1089
1090 out:
1091 rcu_read_unlock();
1092
1093 while (!skb_queue_empty(&reclaimed_skbs)) {
1094 skb = __skb_dequeue(&reclaimed_skbs);
1095 ieee80211_tx_status(mvm->hw, skb);
1096 }
1097 }
1098
1099 /*
1100 * Note that there are transports that buffer frames before they reach
1101 * the firmware. This means that after flush_tx_path is called, the
1102 * queue might not be empty. The race-free way to handle this is to:
1103 * 1) set the station as draining
1104 * 2) flush the Tx path
1105 * 3) wait for the transport queues to be empty
1106 */
1107 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, bool sync)
1108 {
1109 int ret;
1110 struct iwl_tx_path_flush_cmd flush_cmd = {
1111 .queues_ctl = cpu_to_le32(tfd_msk),
1112 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH),
1113 };
1114
1115 u32 flags = sync ? 0 : CMD_ASYNC;
1116
1117 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags,
1118 sizeof(flush_cmd), &flush_cmd);
1119 if (ret)
1120 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
1121 return ret;
1122 }
Linux kernel - Deliverables
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