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iwlwifi: mvm: use correct type for firmware status
[linux-2.6-block.git] / drivers / net / wireless / iwlwifi / mvm / tx.c
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8ca151b5
JB		 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 *
51368bf7 8 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
8b4139dc 9 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
8ca151b5
JB		 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.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
23 * USA
24 *
25 * The full GNU General Public License is included in this distribution
410dc5aa 26 * in the file called COPYING.
8ca151b5
JB		 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 *
51368bf7 34 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
8b4139dc 35 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
8ca151b5
JB		 36 * All rights reserved.
37 *
38 * Redistribution and use in source and binary forms, with or without
39 * modification, are permitted provided that the following conditions
40 * are met:
41 *
42 * * Redistributions of source code must retain the above copyright
43 * notice, this list of conditions and the following disclaimer.
44 * * Redistributions in binary form must reproduce the above copyright
45 * notice, this list of conditions and the following disclaimer in
46 * the documentation and/or other materials provided with the
47 * distribution.
48 * * Neither the name Intel Corporation nor the names of its
49 * contributors may be used to endorse or promote products derived
50 * from this software without specific prior written permission.
51 *
52 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
53 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
54 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
55 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
56 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
57 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
58 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
59 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
60 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
61 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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/*
74 * Sets most of the Tx cmd's fields
75 */
76static void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb,
77 struct iwl_tx_cmd *tx_cmd,
78 struct ieee80211_tx_info *info, u8 sta_id)
79{
80 struct ieee80211_hdr *hdr = (void *)skb->data;
81 __le16 fc = hdr->frame_control;
82 u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags);
83 u32 len = skb->len + FCS_LEN;
b797e3fb 84 u8 ac;
8ca151b5
JB		 85
86 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
87 tx_flags |= TX_CMD_FLG_ACK;
88 else
89 tx_flags &= ~TX_CMD_FLG_ACK;
90
91 if (ieee80211_is_probe_resp(fc))
92 tx_flags |= TX_CMD_FLG_TSF;
93 else if (ieee80211_is_back_req(fc))
94 tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR;
95
8ca151b5
JB		 96 if (ieee80211_has_morefrags(fc))
97 tx_flags |= TX_CMD_FLG_MORE_FRAG;
98
99 if (ieee80211_is_data_qos(fc)) {
100 u8 *qc = ieee80211_get_qos_ctl(hdr);
101 tx_cmd->tid_tspec = qc[0] & 0xf;
102 tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
103 } else {
104 tx_cmd->tid_tspec = IWL_TID_NON_QOS;
105 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
106 tx_flags |= TX_CMD_FLG_SEQ_CTL;
107 else
108 tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
109 }
110
b797e3fb
EG		 111 /* tid_tspec will default to 0 = BE when QOS isn't enabled */
112 ac = tid_to_mac80211_ac[tx_cmd->tid_tspec];
113 tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) <<
114 TX_CMD_FLG_BT_PRIO_POS;
115
8ca151b5
JB		 116 if (ieee80211_is_mgmt(fc)) {
117 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
118 tx_cmd->pm_frame_timeout = cpu_to_le16(3);
119 else
120 tx_cmd->pm_frame_timeout = cpu_to_le16(2);
121
122 /* The spec allows Action frames in A-MPDU, we don't support
123 * it
124 */
125 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU);
63f7535d 126 } else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) {
0f2ed58e 127 tx_cmd->pm_frame_timeout = cpu_to_le16(2);
8ca151b5
JB		 128 } else {
129 tx_cmd->pm_frame_timeout = 0;
130 }
131
8ca151b5
JB		 132 if (ieee80211_is_data(fc) && len > mvm->rts_threshold &&
133 !is_multicast_ether_addr(ieee80211_get_DA(hdr)))
134 tx_flags |= TX_CMD_FLG_PROT_REQUIRE;
135
f1daa00e
AO		 136 if ((mvm->fw->ucode_capa.capa[0] &
137 IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT) &&
138 ieee80211_action_contains_tpc(skb))
139 tx_flags |= TX_CMD_FLG_WRITE_TX_POWER;
140
8ca151b5
JB		 141 tx_cmd->tx_flags = cpu_to_le32(tx_flags);
142 /* Total # bytes to be transmitted */
143 tx_cmd->len = cpu_to_le16((u16)skb->len);
144 tx_cmd->next_frame_len = 0;
145 tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
146 tx_cmd->sta_id = sta_id;
147}
148
149/*
150 * Sets the fields in the Tx cmd that are rate related
151 */
152static void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm,
153 struct iwl_tx_cmd *tx_cmd,
154 struct ieee80211_tx_info *info,
155 struct ieee80211_sta *sta,
156 __le16 fc)
157{
158 u32 rate_flags;
159 int rate_idx;
160 u8 rate_plcp;
161
162 /* Set retry limit on RTS packets */
163 tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT;
164
165 /* Set retry limit on DATA packets and Probe Responses*/
166 if (ieee80211_is_probe_resp(fc)) {
167 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT;
168 tx_cmd->rts_retry_limit =
169 min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit);
170 } else if (ieee80211_is_back_req(fc)) {
171 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT;
172 } else {
173 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY;
174 }
175
176 /*
e89044d7 177 * for data packets, rate info comes from the table inside the fw. This
1ffde699 178 * table is controlled by LINK_QUALITY commands
8ca151b5
JB		 179 */
180
1ffde699 181 if (ieee80211_is_data(fc) && sta) {
8ca151b5
JB		 182 tx_cmd->initial_rate_index = 0;
183 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE);
184 return;
185 } else if (ieee80211_is_back_req(fc)) {
2edc6ec6
EG		 186 tx_cmd->tx_flags |=
187 cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR);
8ca151b5
JB		 188 }
189
190 /* HT rate doesn't make sense for a non data frame */
191 WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS,
f85e9d19
JB		 192 "Got an HT rate (flags:0x%x/mcs:%d) for a non data frame (fc:0x%x)\n",
193 info->control.rates[0].flags,
194 info->control.rates[0].idx,
195 le16_to_cpu(fc));
8ca151b5
JB		 196
197 rate_idx = info->control.rates[0].idx;
198 /* if the rate isn't a well known legacy rate, take the lowest one */
199 if (rate_idx < 0 || rate_idx > IWL_RATE_COUNT_LEGACY)
200 rate_idx = rate_lowest_index(
201 &mvm->nvm_data->bands[info->band], sta);
202
203 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
204 if (info->band == IEEE80211_BAND_5GHZ)
205 rate_idx += IWL_FIRST_OFDM_RATE;
206
207 /* For 2.4 GHZ band, check that there is no need to remap */
208 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
209
210 /* Get PLCP rate for tx_cmd->rate_n_flags */
211 rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(rate_idx);
212
213 mvm->mgmt_last_antenna_idx =
4ed735e7 214 iwl_mvm_next_antenna(mvm, mvm->fw->valid_tx_ant,
8ca151b5 215 mvm->mgmt_last_antenna_idx);
34c8b24f
EG		 216
217 if (info->band == IEEE80211_BAND_2GHZ &&
218 !iwl_mvm_bt_coex_is_shared_ant_avail(mvm))
bbab7582 219 rate_flags = BIT(mvm->cfg->non_shared_ant) << RATE_MCS_ANT_POS;
34c8b24f
EG		 220 else
221 rate_flags =
222 BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS;
8ca151b5
JB		 223
224 /* Set CCK flag as needed */
225 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
226 rate_flags |= RATE_MCS_CCK_MSK;
227
228 /* Set the rate in the TX cmd */
229 tx_cmd->rate_n_flags = cpu_to_le32((u32)rate_plcp | rate_flags);
230}
231
232/*
233 * Sets the fields in the Tx cmd that are crypto related
234 */
235static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm,
236 struct ieee80211_tx_info *info,
237 struct iwl_tx_cmd *tx_cmd,
238 struct sk_buff *skb_frag)
239{
240 struct ieee80211_key_conf *keyconf = info->control.hw_key;
241
242 switch (keyconf->cipher) {
243 case WLAN_CIPHER_SUITE_CCMP:
244 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
245 memcpy(tx_cmd->key, keyconf->key, keyconf->keylen);
246 if (info->flags & IEEE80211_TX_CTL_AMPDU)
247 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_CCMP_AGG);
248 break;
249
250 case WLAN_CIPHER_SUITE_TKIP:
251 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
252 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
253 break;
254
255 case WLAN_CIPHER_SUITE_WEP104:
256 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
257 /* fall through */
258 case WLAN_CIPHER_SUITE_WEP40:
259 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP |
260 ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) &
261 TX_CMD_SEC_WEP_KEY_IDX_MSK);
262
263 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
264 break;
265 default:
e36e5433 266 tx_cmd->sec_ctl |= TX_CMD_SEC_EXT;
8ca151b5
JB		 267 }
268}
269
270/*
271 * Allocates and sets the Tx cmd the driver data pointers in the skb
272 */
273static struct iwl_device_cmd *
274iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb,
275 struct ieee80211_sta *sta, u8 sta_id)
276{
277 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
278 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
279 struct iwl_device_cmd *dev_cmd;
280 struct iwl_tx_cmd *tx_cmd;
281
282 dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans);
283
284 if (unlikely(!dev_cmd))
285 return NULL;
286
287 memset(dev_cmd, 0, sizeof(*dev_cmd));
3961a61a 288 dev_cmd->hdr.cmd = TX_CMD;
8ca151b5
JB		 289 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
290
291 if (info->control.hw_key)
292 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb);
293
294 iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id);
295
296 iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control);
297
298 memset(&info->status, 0, sizeof(info->status));
299
300 info->driver_data[0] = NULL;
301 info->driver_data[1] = dev_cmd;
302
303 return dev_cmd;
304}
305
306int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb)
307{
308 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
309 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
310 struct iwl_device_cmd *dev_cmd;
311 struct iwl_tx_cmd *tx_cmd;
312 u8 sta_id;
313
314 if (WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU))
315 return -1;
316
317 if (WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM &&
318 (!info->control.vif ||
319 info->hw_queue != info->control.vif->cab_queue)))
320 return -1;
321
7da91b0e
AM		 322 /*
323 * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets that can be used
324 * in 2 different types of vifs, P2P & STATION. P2P uses the offchannel
325 * queue. STATION (HS2.0) uses the auxiliary context of the FW,
326 * and hence needs to be sent on the aux queue
327 */
328 if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
329 info->control.vif->type == NL80211_IFTYPE_STATION)
330 IEEE80211_SKB_CB(skb)->hw_queue = mvm->aux_queue;
331
8ca151b5
JB		 332 /*
333 * If the interface on which frame is sent is the P2P_DEVICE
334 * or an AP/GO interface use the broadcast station associated
335 * with it; otherwise use the AUX station.
336 */
337 if (info->control.vif &&
338 (info->control.vif->type == NL80211_IFTYPE_P2P_DEVICE ||
339 info->control.vif->type == NL80211_IFTYPE_AP)) {
340 struct iwl_mvm_vif *mvmvif =
341 iwl_mvm_vif_from_mac80211(info->control.vif);
342 sta_id = mvmvif->bcast_sta.sta_id;
343 } else {
344 sta_id = mvm->aux_sta.sta_id;
345 }
346
347 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, info->hw_queue);
348
349 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, NULL, sta_id);
350 if (!dev_cmd)
351 return -1;
352
353 /* From now on, we cannot access info->control */
354 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
355
356 /* Copy MAC header from skb into command buffer */
357 memcpy(tx_cmd->hdr, hdr, ieee80211_hdrlen(hdr->frame_control));
358
359 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, info->hw_queue)) {
360 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
361 return -1;
362 }
363
364 return 0;
365}
366
367/*
368 * Sets the fields in the Tx cmd that are crypto related
369 */
370int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb,
371 struct ieee80211_sta *sta)
372{
373 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
374 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
375 struct iwl_mvm_sta *mvmsta;
376 struct iwl_device_cmd *dev_cmd;
377 struct iwl_tx_cmd *tx_cmd;
378 __le16 fc;
379 u16 seq_number = 0;
380 u8 tid = IWL_MAX_TID_COUNT;
381 u8 txq_id = info->hw_queue;
382 bool is_data_qos = false, is_ampdu = false;
383
5b577a90 384 mvmsta = iwl_mvm_sta_from_mac80211(sta);
8ca151b5
JB		 385 fc = hdr->frame_control;
386
387 if (WARN_ON_ONCE(!mvmsta))
388 return -1;
389
881acd89 390 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
8ca151b5
JB		 391 return -1;
392
393 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, sta, mvmsta->sta_id);
394 if (!dev_cmd)
395 goto drop;
396
397 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
398 /* From now on, we cannot access info->control */
399
3e56eadf
JB		 400 /*
401 * we handle that entirely ourselves -- for uAPSD the firmware
402 * will always send a notification, and for PS-Poll responses
403 * we'll notify mac80211 when getting frame status
404 */
405 info->flags &= ~IEEE80211_TX_STATUS_EOSP;
406
8ca151b5
JB		 407 spin_lock(&mvmsta->lock);
408
409 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
410 u8 *qc = NULL;
411 qc = ieee80211_get_qos_ctl(hdr);
412 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
413 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
414 goto drop_unlock_sta;
415
416 seq_number = mvmsta->tid_data[tid].seq_number;
417 seq_number &= IEEE80211_SCTL_SEQ;
418 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
419 hdr->seq_ctrl |= cpu_to_le16(seq_number);
8ca151b5
JB		 420 is_data_qos = true;
421 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU;
422 }
423
424 /* Copy MAC header from skb into command buffer */
425 memcpy(tx_cmd->hdr, hdr, ieee80211_hdrlen(fc));
426
427 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
428
429 if (is_ampdu) {
430 if (WARN_ON_ONCE(mvmsta->tid_data[tid].state != IWL_AGG_ON))
431 goto drop_unlock_sta;
432 txq_id = mvmsta->tid_data[tid].txq_id;
433 }
434
435 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id,
cf9d1188 436 tid, txq_id, IEEE80211_SEQ_TO_SN(seq_number));
8ca151b5 437
8ca151b5
JB		 438 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id))
439 goto drop_unlock_sta;
440
441 if (is_data_qos && !ieee80211_has_morefrags(fc))
cf9d1188 442 mvmsta->tid_data[tid].seq_number = seq_number + 0x10;
8ca151b5
JB		 443
444 spin_unlock(&mvmsta->lock);
445
19e737c9 446 if (txq_id < mvm->first_agg_queue)
e3d4bc8c 447 atomic_inc(&mvm->pending_frames[mvmsta->sta_id]);
8ca151b5
JB		 448
449 return 0;
450
451drop_unlock_sta:
452 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
453 spin_unlock(&mvmsta->lock);
454drop:
455 return -1;
456}
457
458static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm,
459 struct ieee80211_sta *sta, u8 tid)
460{
5b577a90 461 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
8ca151b5
JB		 462 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
463 struct ieee80211_vif *vif = mvmsta->vif;
464
465 lockdep_assert_held(&mvmsta->lock);
466
3e56eadf
JB		 467 if ((tid_data->state == IWL_AGG_ON ||
468 tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) &&
469 iwl_mvm_tid_queued(tid_data) == 0) {
470 /*
471 * Now that this aggregation queue is empty tell mac80211 so it
472 * knows we no longer have frames buffered for the station on
473 * this TID (for the TIM bitmap calculation.)
474 */
475 ieee80211_sta_set_buffered(sta, tid, false);
476 }
477
8ca151b5
JB		 478 if (tid_data->ssn != tid_data->next_reclaimed)
479 return;
480
481 switch (tid_data->state) {
482 case IWL_EMPTYING_HW_QUEUE_ADDBA:
483 IWL_DEBUG_TX_QUEUES(mvm,
484 "Can continue addBA flow ssn = next_recl = %d\n",
485 tid_data->next_reclaimed);
486 tid_data->state = IWL_AGG_STARTING;
487 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
488 break;
489
490 case IWL_EMPTYING_HW_QUEUE_DELBA:
491 IWL_DEBUG_TX_QUEUES(mvm,
492 "Can continue DELBA flow ssn = next_recl = %d\n",
493 tid_data->next_reclaimed);
3edf8ff6 494 iwl_mvm_disable_txq(mvm, tid_data->txq_id);
8ca151b5
JB		 495 tid_data->state = IWL_AGG_OFF;
496 /*
497 * we can't hold the mutex - but since we are after a sequence
3edf8ff6 498 * point (call to iwl_mvm_disable_txq(), so we don't even need
8ca151b5
JB		 499 * a memory barrier.
500 */
501 mvm->queue_to_mac80211[tid_data->txq_id] =
502 IWL_INVALID_MAC80211_QUEUE;
503 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
504 break;
505
506 default:
507 break;
508 }
509}
510
511#ifdef CONFIG_IWLWIFI_DEBUG
512const char *iwl_mvm_get_tx_fail_reason(u32 status)
513{
514#define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
515#define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
516
517 switch (status & TX_STATUS_MSK) {
518 case TX_STATUS_SUCCESS:
519 return "SUCCESS";
520 TX_STATUS_POSTPONE(DELAY);
521 TX_STATUS_POSTPONE(FEW_BYTES);
522 TX_STATUS_POSTPONE(BT_PRIO);
523 TX_STATUS_POSTPONE(QUIET_PERIOD);
524 TX_STATUS_POSTPONE(CALC_TTAK);
525 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
526 TX_STATUS_FAIL(SHORT_LIMIT);
527 TX_STATUS_FAIL(LONG_LIMIT);
528 TX_STATUS_FAIL(UNDERRUN);
529 TX_STATUS_FAIL(DRAIN_FLOW);
530 TX_STATUS_FAIL(RFKILL_FLUSH);
531 TX_STATUS_FAIL(LIFE_EXPIRE);
532 TX_STATUS_FAIL(DEST_PS);
533 TX_STATUS_FAIL(HOST_ABORTED);
534 TX_STATUS_FAIL(BT_RETRY);
535 TX_STATUS_FAIL(STA_INVALID);
536 TX_STATUS_FAIL(FRAG_DROPPED);
537 TX_STATUS_FAIL(TID_DISABLE);
538 TX_STATUS_FAIL(FIFO_FLUSHED);
539 TX_STATUS_FAIL(SMALL_CF_POLL);
540 TX_STATUS_FAIL(FW_DROP);
541 TX_STATUS_FAIL(STA_COLOR_MISMATCH);
542 }
543
544 return "UNKNOWN";
545
546#undef TX_STATUS_FAIL
547#undef TX_STATUS_POSTPONE
548}
549#endif /* CONFIG_IWLWIFI_DEBUG */
550
d310e405
ES		 551void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags,
552 enum ieee80211_band band,
553 struct ieee80211_tx_rate *r)
8ca151b5 554{
8ca151b5
JB		 555 if (rate_n_flags & RATE_HT_MCS_GF_MSK)
556 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
557 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
558 case RATE_MCS_CHAN_WIDTH_20:
559 break;
560 case RATE_MCS_CHAN_WIDTH_40:
561 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
562 break;
563 case RATE_MCS_CHAN_WIDTH_80:
564 r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH;
565 break;
566 case RATE_MCS_CHAN_WIDTH_160:
567 r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH;
568 break;
569 }
570 if (rate_n_flags & RATE_MCS_SGI_MSK)
571 r->flags |= IEEE80211_TX_RC_SHORT_GI;
572 if (rate_n_flags & RATE_MCS_HT_MSK) {
573 r->flags |= IEEE80211_TX_RC_MCS;
574 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
575 } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
576 ieee80211_rate_set_vht(
577 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK,
578 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
579 RATE_VHT_MCS_NSS_POS) + 1);
580 r->flags |= IEEE80211_TX_RC_VHT_MCS;
581 } else {
582 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
d310e405 583 band);
8ca151b5
JB		 584 }
585}
586
d310e405
ES		 587/**
588 * translate ucode response to mac80211 tx status control values
589 */
590static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags,
591 struct ieee80211_tx_info *info)
592{
593 struct ieee80211_tx_rate *r = &info->status.rates[0];
594
595 info->status.antenna =
596 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
597 iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r);
598}
599
8ca151b5
JB		 600static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm,
601 struct iwl_rx_packet *pkt)
602{
603 struct ieee80211_sta *sta;
604 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
605 int txq_id = SEQ_TO_QUEUE(sequence);
606 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
607 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
608 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
609 u32 status = le16_to_cpu(tx_resp->status.status);
610 u16 ssn = iwl_mvm_get_scd_ssn(tx_resp);
611 struct iwl_mvm_sta *mvmsta;
612 struct sk_buff_head skbs;
613 u8 skb_freed = 0;
614 u16 next_reclaimed, seq_ctl;
615
616 __skb_queue_head_init(&skbs);
617
618 seq_ctl = le16_to_cpu(tx_resp->seq_ctl);
619
620 /* we can free until ssn % q.n_bd not inclusive */
621 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs);
622
623 while (!skb_queue_empty(&skbs)) {
624 struct sk_buff *skb = __skb_dequeue(&skbs);
625 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
626
627 skb_freed++;
628
629 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
630
631 memset(&info->status, 0, sizeof(info->status));
632
633 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
634
635 /* inform mac80211 about what happened with the frame */
636 switch (status & TX_STATUS_MSK) {
637 case TX_STATUS_SUCCESS:
638 case TX_STATUS_DIRECT_DONE:
639 info->flags |= IEEE80211_TX_STAT_ACK;
640 break;
641 case TX_STATUS_FAIL_DEST_PS:
642 info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
643 break;
644 default:
645 break;
646 }
647
648 info->status.rates[0].count = tx_resp->failure_frame + 1;
d310e405
ES		 649 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate),
650 info);
8ca151b5
JB		 651
652 /* Single frame failure in an AMPDU queue => send BAR */
19e737c9 653 if (txq_id >= mvm->first_agg_queue &&
2470b36e 654 !(info->flags & IEEE80211_TX_STAT_ACK))
8ca151b5 655 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
8ca151b5 656
ebea2f32
EG		 657 /* W/A FW bug: seq_ctl is wrong when the status isn't success */
658 if (status != TX_STATUS_SUCCESS) {
8ca151b5
JB		 659 struct ieee80211_hdr *hdr = (void *)skb->data;
660 seq_ctl = le16_to_cpu(hdr->seq_ctrl);
661 }
662
3a84b69e
EP		 663 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1);
664 info->status.status_driver_data[0] =
665 (void *)(uintptr_t)tx_resp->reduced_tpc;
666
f14d6b39 667 ieee80211_tx_status(mvm->hw, skb);
8ca151b5
JB		 668 }
669
19e737c9 670 if (txq_id >= mvm->first_agg_queue) {
8ca151b5
JB		 671 /* If this is an aggregation queue, we use the ssn since:
672 * ssn = wifi seq_num % 256.
673 * The seq_ctl is the sequence control of the packet to which
674 * this Tx response relates. But if there is a hole in the
675 * bitmap of the BA we received, this Tx response may allow to
676 * reclaim the hole and all the subsequent packets that were
677 * already acked. In that case, seq_ctl != ssn, and the next
678 * packet to be reclaimed will be ssn and not seq_ctl. In that
679 * case, several packets will be reclaimed even if
680 * frame_count = 1.
681 *
682 * The ssn is the index (% 256) of the latest packet that has
683 * treated (acked / dropped) + 1.
684 */
685 next_reclaimed = ssn;
686 } else {
687 /* The next packet to be reclaimed is the one after this one */
9a886586 688 next_reclaimed = IEEE80211_SEQ_TO_SN(seq_ctl + 0x10);
8ca151b5
JB		 689 }
690
691 IWL_DEBUG_TX_REPLY(mvm,
8c6e83d6
EG		 692 "TXQ %d status %s (0x%08x)\n",
693 txq_id, iwl_mvm_get_tx_fail_reason(status), status);
694
695 IWL_DEBUG_TX_REPLY(mvm,
696 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
697 le32_to_cpu(tx_resp->initial_rate),
8ca151b5
JB		 698 tx_resp->failure_frame, SEQ_TO_INDEX(sequence),
699 ssn, next_reclaimed, seq_ctl);
700
701 rcu_read_lock();
702
703 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
9bb0c1ad
EG		 704 /*
705 * sta can't be NULL otherwise it'd mean that the sta has been freed in
706 * the firmware while we still have packets for it in the Tx queues.
707 */
708 if (WARN_ON_ONCE(!sta))
709 goto out;
8ca151b5 710
9bb0c1ad 711 if (!IS_ERR(sta)) {
5b577a90 712 mvmsta = iwl_mvm_sta_from_mac80211(sta);
8ca151b5
JB		 713
714 if (tid != IWL_TID_NON_QOS) {
715 struct iwl_mvm_tid_data *tid_data =
716 &mvmsta->tid_data[tid];
717
2bfb5092 718 spin_lock_bh(&mvmsta->lock);
8ca151b5
JB		 719 tid_data->next_reclaimed = next_reclaimed;
720 IWL_DEBUG_TX_REPLY(mvm, "Next reclaimed packet:%d\n",
721 next_reclaimed);
722 iwl_mvm_check_ratid_empty(mvm, sta, tid);
2bfb5092 723 spin_unlock_bh(&mvmsta->lock);
8ca151b5 724 }
3e56eadf
JB		 725
726 if (mvmsta->next_status_eosp) {
727 mvmsta->next_status_eosp = false;
728 ieee80211_sta_eosp(sta);
729 }
8ca151b5 730 } else {
8ca151b5
JB		 731 mvmsta = NULL;
732 }
733
734 /*
735 * If the txq is not an AMPDU queue, there is no chance we freed
736 * several skbs. Check that out...
8ca151b5 737 */
9bb0c1ad
EG		 738 if (txq_id >= mvm->first_agg_queue)
739 goto out;
740
741 /* We can't free more than one frame at once on a shared queue */
742 WARN_ON(skb_freed > 1);
743
589a6ba4 744 /* If we have still frames for this STA nothing to do here */
9bb0c1ad
EG		 745 if (!atomic_sub_and_test(skb_freed, &mvm->pending_frames[sta_id]))
746 goto out;
747
748 if (mvmsta && mvmsta->vif->type == NL80211_IFTYPE_AP) {
003e5236 749
9bb0c1ad 750 /*
003e5236
AO		 751 * If there are no pending frames for this STA and
752 * the tx to this station is not disabled, notify
753 * mac80211 that this station can now wake up in its
9bb0c1ad
EG		 754 * STA table.
755 * If mvmsta is not NULL, sta is valid.
756 */
003e5236
AO		 757
758 spin_lock_bh(&mvmsta->lock);
759
760 if (!mvmsta->disable_tx)
761 ieee80211_sta_block_awake(mvm->hw, sta, false);
762
763 spin_unlock_bh(&mvmsta->lock);
9bb0c1ad
EG		 764 }
765
766 if (PTR_ERR(sta) == -EBUSY || PTR_ERR(sta) == -ENOENT) {
767 /*
768 * We are draining and this was the last packet - pre_rcu_remove
769 * has been called already. We might be after the
770 * synchronize_net already.
771 * Don't rely on iwl_mvm_rm_sta to see the empty Tx queues.
772 */
773 set_bit(sta_id, mvm->sta_drained);
774 schedule_work(&mvm->sta_drained_wk);
8ca151b5
JB		 775 }
776
9bb0c1ad 777out:
8ca151b5
JB		 778 rcu_read_unlock();
779}
780
781#ifdef CONFIG_IWLWIFI_DEBUG
782#define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
783static const char *iwl_get_agg_tx_status(u16 status)
784{
785 switch (status & AGG_TX_STATE_STATUS_MSK) {
786 AGG_TX_STATE_(TRANSMITTED);
787 AGG_TX_STATE_(UNDERRUN);
788 AGG_TX_STATE_(BT_PRIO);
789 AGG_TX_STATE_(FEW_BYTES);
790 AGG_TX_STATE_(ABORT);
791 AGG_TX_STATE_(LAST_SENT_TTL);
792 AGG_TX_STATE_(LAST_SENT_TRY_CNT);
793 AGG_TX_STATE_(LAST_SENT_BT_KILL);
794 AGG_TX_STATE_(SCD_QUERY);
795 AGG_TX_STATE_(TEST_BAD_CRC32);
796 AGG_TX_STATE_(RESPONSE);
797 AGG_TX_STATE_(DUMP_TX);
798 AGG_TX_STATE_(DELAY_TX);
799 }
800
801 return "UNKNOWN";
802}
803
804static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
805 struct iwl_rx_packet *pkt)
806{
807 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
808 struct agg_tx_status *frame_status = &tx_resp->status;
809 int i;
810
811 for (i = 0; i < tx_resp->frame_count; i++) {
812 u16 fstatus = le16_to_cpu(frame_status[i].status);
813
814 IWL_DEBUG_TX_REPLY(mvm,
815 "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
816 iwl_get_agg_tx_status(fstatus),
817 fstatus & AGG_TX_STATE_STATUS_MSK,
818 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >>
819 AGG_TX_STATE_TRY_CNT_POS,
820 le16_to_cpu(frame_status[i].sequence));
821 }
822}
823#else
824static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
825 struct iwl_rx_packet *pkt)
826{}
827#endif /* CONFIG_IWLWIFI_DEBUG */
828
829static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm,
830 struct iwl_rx_packet *pkt)
831{
832 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
833 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
834 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
835 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
836 struct ieee80211_sta *sta;
837
19e737c9 838 if (WARN_ON_ONCE(SEQ_TO_QUEUE(sequence) < mvm->first_agg_queue))
8ca151b5
JB		 839 return;
840
841 if (WARN_ON_ONCE(tid == IWL_TID_NON_QOS))
842 return;
843
844 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt);
845
846 rcu_read_lock();
847
848 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
849
850 if (!WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
5b577a90 851 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
8ca151b5
JB		 852 mvmsta->tid_data[tid].rate_n_flags =
853 le32_to_cpu(tx_resp->initial_rate);
3a84b69e 854 mvmsta->tid_data[tid].reduced_tpc = tx_resp->reduced_tpc;
8ca151b5
JB		 855 }
856
857 rcu_read_unlock();
858}
859
860int iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
861 struct iwl_device_cmd *cmd)
862{
863 struct iwl_rx_packet *pkt = rxb_addr(rxb);
864 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
865
866 if (tx_resp->frame_count == 1)
867 iwl_mvm_rx_tx_cmd_single(mvm, pkt);
868 else
869 iwl_mvm_rx_tx_cmd_agg(mvm, pkt);
870
871 return 0;
872}
873
a7130442
ES		 874static void iwl_mvm_tx_info_from_ba_notif(struct ieee80211_tx_info *info,
875 struct iwl_mvm_ba_notif *ba_notif,
876 struct iwl_mvm_tid_data *tid_data)
877{
878 info->flags |= IEEE80211_TX_STAT_AMPDU;
879 info->status.ampdu_ack_len = ba_notif->txed_2_done;
880 info->status.ampdu_len = ba_notif->txed;
881 iwl_mvm_hwrate_to_tx_status(tid_data->rate_n_flags,
882 info);
883 info->status.status_driver_data[0] =
884 (void *)(uintptr_t)tid_data->reduced_tpc;
885}
886
8ca151b5
JB		 887int iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
888 struct iwl_device_cmd *cmd)
889{
890 struct iwl_rx_packet *pkt = rxb_addr(rxb);
891 struct iwl_mvm_ba_notif *ba_notif = (void *)pkt->data;
892 struct sk_buff_head reclaimed_skbs;
893 struct iwl_mvm_tid_data *tid_data;
8ca151b5
JB		 894 struct ieee80211_sta *sta;
895 struct iwl_mvm_sta *mvmsta;
8ca151b5
JB		 896 struct sk_buff *skb;
897 int sta_id, tid, freed;
8ca151b5
JB		 898 /* "flow" corresponds to Tx queue */
899 u16 scd_flow = le16_to_cpu(ba_notif->scd_flow);
8ca151b5
JB		 900 /* "ssn" is start of block-ack Tx window, corresponds to index
901 * (in Tx queue's circular buffer) of first TFD/frame in window */
902 u16 ba_resp_scd_ssn = le16_to_cpu(ba_notif->scd_ssn);
903
904 sta_id = ba_notif->sta_id;
905 tid = ba_notif->tid;
906
907 rcu_read_lock();
908
909 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
910
911 /* Reclaiming frames for a station that has been deleted ? */
912 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
913 rcu_read_unlock();
914 return 0;
915 }
916
5b577a90 917 mvmsta = iwl_mvm_sta_from_mac80211(sta);
8ca151b5
JB		 918 tid_data = &mvmsta->tid_data[tid];
919
920 if (WARN_ONCE(tid_data->txq_id != scd_flow, "Q %d, tid %d, flow %d",
921 tid_data->txq_id, tid, scd_flow)) {
922 rcu_read_unlock();
923 return 0;
924 }
925
2bfb5092 926 spin_lock_bh(&mvmsta->lock);
8ca151b5
JB		 927
928 __skb_queue_head_init(&reclaimed_skbs);
929
930 /*
931 * Release all TFDs before the SSN, i.e. all TFDs in front of
932 * block-ack window (we assume that they've been successfully
933 * transmitted ... if not, it's too late anyway).
934 */
935 iwl_trans_reclaim(mvm->trans, scd_flow, ba_resp_scd_ssn,
936 &reclaimed_skbs);
937
938 IWL_DEBUG_TX_REPLY(mvm,
939 "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
940 (u8 *)&ba_notif->sta_addr_lo32,
941 ba_notif->sta_id);
942 IWL_DEBUG_TX_REPLY(mvm,
943 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
944 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl),
945 (unsigned long long)le64_to_cpu(ba_notif->bitmap),
946 scd_flow, ba_resp_scd_ssn, ba_notif->txed,
947 ba_notif->txed_2_done);
948
949 tid_data->next_reclaimed = ba_resp_scd_ssn;
950
951 iwl_mvm_check_ratid_empty(mvm, sta, tid);
952
953 freed = 0;
954
955 skb_queue_walk(&reclaimed_skbs, skb) {
143582c6
JB		 956 struct ieee80211_hdr *hdr = (void *)skb->data;
957 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
8ca151b5
JB		 958
959 if (ieee80211_is_data_qos(hdr->frame_control))
960 freed++;
961 else
962 WARN_ON_ONCE(1);
963
8ca151b5
JB		 964 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
965
143582c6
JB		 966 memset(&info->status, 0, sizeof(info->status));
967 /* Packet was transmitted successfully, failures come as single
968 * frames because before failing a frame the firmware transmits
969 * it without aggregation at least once.
970 */
971 info->flags |= IEEE80211_TX_STAT_ACK;
972
a7130442
ES		 973 /* this is the first skb we deliver in this batch */
974 /* put the rate scaling data there */
975 if (freed == 1)
976 iwl_mvm_tx_info_from_ba_notif(info, ba_notif, tid_data);
8ca151b5
JB		 977 }
978
2bfb5092 979 spin_unlock_bh(&mvmsta->lock);
8ca151b5 980
a7130442
ES		 981 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is
982 * possible (i.e. first MPDU in the aggregation wasn't acked)
983 * Still it's important to update RS about sent vs. acked.
984 */
985 if (skb_queue_empty(&reclaimed_skbs)) {
986 struct ieee80211_tx_info ba_info = {};
987 struct ieee80211_chanctx_conf *chanctx_conf = NULL;
988
989 if (mvmsta->vif)
990 chanctx_conf =
991 rcu_dereference(mvmsta->vif->chanctx_conf);
992
993 if (WARN_ON_ONCE(!chanctx_conf))
994 goto out;
995
996 ba_info.band = chanctx_conf->def.chan->band;
997 iwl_mvm_tx_info_from_ba_notif(&ba_info, ba_notif, tid_data);
998
999 IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n");
1000 iwl_mvm_rs_tx_status(mvm, sta, tid, &ba_info);
1001 }
1002
1003out:
8ca151b5
JB		 1004 rcu_read_unlock();
1005
1006 while (!skb_queue_empty(&reclaimed_skbs)) {
1007 skb = __skb_dequeue(&reclaimed_skbs);
f14d6b39 1008 ieee80211_tx_status(mvm->hw, skb);
8ca151b5
JB		 1009 }
1010
1011 return 0;
1012}
1013
1014int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, bool sync)
1015{
1016 int ret;
1017 struct iwl_tx_path_flush_cmd flush_cmd = {
1018 .queues_ctl = cpu_to_le32(tfd_msk),
1019 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH),
1020 };
1021
a1022927 1022 u32 flags = sync ? 0 : CMD_ASYNC;
8ca151b5
JB		 1023
1024 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags,
1025 sizeof(flush_cmd), &flush_cmd);
1026 if (ret)
1027 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
1028 return ret;
1029}
Linux 6.x block layer and io_uring tree(s)