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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 | * | |
8 | * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved. | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of version 2 of the GNU General Public License as | |
12 | * published by the Free Software Foundation. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, but | |
15 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, | |
22 | * USA | |
23 | * | |
24 | * The full GNU General Public License is included in this distribution | |
25 | * in the file called LICENSE.GPL. | |
26 | * | |
27 | * Contact Information: | |
28 | * Intel Linux Wireless <ilw@linux.intel.com> | |
29 | * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 | |
30 | * | |
31 | * BSD LICENSE | |
32 | * | |
33 | * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved. | |
34 | * All rights reserved. | |
35 | * | |
36 | * Redistribution and use in source and binary forms, with or without | |
37 | * modification, are permitted provided that the following conditions | |
38 | * are met: | |
39 | * | |
40 | * * Redistributions of source code must retain the above copyright | |
41 | * notice, this list of conditions and the following disclaimer. | |
42 | * * Redistributions in binary form must reproduce the above copyright | |
43 | * notice, this list of conditions and the following disclaimer in | |
44 | * the documentation and/or other materials provided with the | |
45 | * distribution. | |
46 | * * Neither the name Intel Corporation nor the names of its | |
47 | * contributors may be used to endorse or promote products derived | |
48 | * from this software without specific prior written permission. | |
49 | * | |
50 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
51 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
52 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
53 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
54 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
55 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
56 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
57 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
58 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
59 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
60 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
61 | * | |
62 | *****************************************************************************/ | |
63 | #include <linux/ieee80211.h> | |
64 | #include <linux/etherdevice.h> | |
65 | ||
66 | #include "iwl-trans.h" | |
67 | #include "iwl-eeprom-parse.h" | |
68 | #include "mvm.h" | |
69 | #include "sta.h" | |
70 | ||
71 | /* | |
72 | * Sets most of the Tx cmd's fields | |
73 | */ | |
74 | static void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb, | |
75 | struct iwl_tx_cmd *tx_cmd, | |
76 | struct ieee80211_tx_info *info, u8 sta_id) | |
77 | { | |
78 | struct ieee80211_hdr *hdr = (void *)skb->data; | |
79 | __le16 fc = hdr->frame_control; | |
80 | u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags); | |
81 | u32 len = skb->len + FCS_LEN; | |
82 | ||
83 | if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) | |
84 | tx_flags |= TX_CMD_FLG_ACK; | |
85 | else | |
86 | tx_flags &= ~TX_CMD_FLG_ACK; | |
87 | ||
88 | if (ieee80211_is_probe_resp(fc)) | |
89 | tx_flags |= TX_CMD_FLG_TSF; | |
90 | else if (ieee80211_is_back_req(fc)) | |
91 | tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR; | |
92 | ||
93 | /* High prio packet (wrt. BT coex) if it is EAPOL, MCAST or MGMT */ | |
94 | if (info->band == IEEE80211_BAND_2GHZ && | |
95 | (skb->protocol == cpu_to_be16(ETH_P_PAE) || | |
96 | is_multicast_ether_addr(hdr->addr1) || | |
97 | ieee80211_is_back_req(fc) || | |
98 | ieee80211_is_mgmt(fc))) | |
99 | tx_flags |= TX_CMD_FLG_BT_DIS; | |
100 | ||
101 | if (ieee80211_has_morefrags(fc)) | |
102 | tx_flags |= TX_CMD_FLG_MORE_FRAG; | |
103 | ||
104 | if (ieee80211_is_data_qos(fc)) { | |
105 | u8 *qc = ieee80211_get_qos_ctl(hdr); | |
106 | tx_cmd->tid_tspec = qc[0] & 0xf; | |
107 | tx_flags &= ~TX_CMD_FLG_SEQ_CTL; | |
108 | } else { | |
109 | tx_cmd->tid_tspec = IWL_TID_NON_QOS; | |
110 | if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) | |
111 | tx_flags |= TX_CMD_FLG_SEQ_CTL; | |
112 | else | |
113 | tx_flags &= ~TX_CMD_FLG_SEQ_CTL; | |
114 | } | |
115 | ||
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); | |
126 | } else { | |
127 | tx_cmd->pm_frame_timeout = 0; | |
128 | } | |
129 | ||
130 | if (info->flags & IEEE80211_TX_CTL_AMPDU) | |
131 | tx_flags |= TX_CMD_FLG_PROT_REQUIRE; | |
132 | ||
133 | if (ieee80211_is_data(fc) && len > mvm->rts_threshold && | |
134 | !is_multicast_ether_addr(ieee80211_get_DA(hdr))) | |
135 | tx_flags |= TX_CMD_FLG_PROT_REQUIRE; | |
136 | ||
137 | tx_cmd->driver_txop = 0; | |
138 | tx_cmd->tx_flags = cpu_to_le32(tx_flags); | |
139 | /* Total # bytes to be transmitted */ | |
140 | tx_cmd->len = cpu_to_le16((u16)skb->len); | |
141 | tx_cmd->next_frame_len = 0; | |
142 | tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE); | |
143 | tx_cmd->sta_id = sta_id; | |
144 | } | |
145 | ||
146 | /* | |
147 | * Sets the fields in the Tx cmd that are rate related | |
148 | */ | |
149 | static void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, | |
150 | struct iwl_tx_cmd *tx_cmd, | |
151 | struct ieee80211_tx_info *info, | |
152 | struct ieee80211_sta *sta, | |
153 | __le16 fc) | |
154 | { | |
155 | u32 rate_flags; | |
156 | int rate_idx; | |
157 | u8 rate_plcp; | |
158 | ||
159 | /* Set retry limit on RTS packets */ | |
160 | tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT; | |
161 | ||
162 | /* Set retry limit on DATA packets and Probe Responses*/ | |
163 | if (ieee80211_is_probe_resp(fc)) { | |
164 | tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT; | |
165 | tx_cmd->rts_retry_limit = | |
166 | min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit); | |
167 | } else if (ieee80211_is_back_req(fc)) { | |
168 | tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT; | |
169 | } else { | |
170 | tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY; | |
171 | } | |
172 | ||
173 | /* | |
174 | * for data packets, rate info comes from the table inside he fw. This | |
175 | * table is controlled by LINK_QUALITY commands | |
176 | */ | |
177 | ||
178 | if (ieee80211_is_data(fc)) { | |
179 | tx_cmd->initial_rate_index = 0; | |
180 | tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE); | |
181 | return; | |
182 | } else if (ieee80211_is_back_req(fc)) { | |
183 | tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE); | |
184 | } | |
185 | ||
186 | /* HT rate doesn't make sense for a non data frame */ | |
187 | WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS, | |
188 | "Got an HT rate for a non data frame 0x%x\n", | |
189 | info->control.rates[0].flags); | |
190 | ||
191 | rate_idx = info->control.rates[0].idx; | |
192 | /* if the rate isn't a well known legacy rate, take the lowest one */ | |
193 | if (rate_idx < 0 || rate_idx > IWL_RATE_COUNT_LEGACY) | |
194 | rate_idx = rate_lowest_index( | |
195 | &mvm->nvm_data->bands[info->band], sta); | |
196 | ||
197 | /* For 5 GHZ band, remap mac80211 rate indices into driver indices */ | |
198 | if (info->band == IEEE80211_BAND_5GHZ) | |
199 | rate_idx += IWL_FIRST_OFDM_RATE; | |
200 | ||
201 | /* For 2.4 GHZ band, check that there is no need to remap */ | |
202 | BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0); | |
203 | ||
204 | /* Get PLCP rate for tx_cmd->rate_n_flags */ | |
205 | rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(rate_idx); | |
206 | ||
207 | mvm->mgmt_last_antenna_idx = | |
208 | iwl_mvm_next_antenna(mvm, mvm->nvm_data->valid_tx_ant, | |
209 | mvm->mgmt_last_antenna_idx); | |
210 | rate_flags = BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS; | |
211 | ||
212 | /* Set CCK flag as needed */ | |
213 | if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE)) | |
214 | rate_flags |= RATE_MCS_CCK_MSK; | |
215 | ||
216 | /* Set the rate in the TX cmd */ | |
217 | tx_cmd->rate_n_flags = cpu_to_le32((u32)rate_plcp | rate_flags); | |
218 | } | |
219 | ||
220 | /* | |
221 | * Sets the fields in the Tx cmd that are crypto related | |
222 | */ | |
223 | static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm, | |
224 | struct ieee80211_tx_info *info, | |
225 | struct iwl_tx_cmd *tx_cmd, | |
226 | struct sk_buff *skb_frag) | |
227 | { | |
228 | struct ieee80211_key_conf *keyconf = info->control.hw_key; | |
229 | ||
230 | switch (keyconf->cipher) { | |
231 | case WLAN_CIPHER_SUITE_CCMP: | |
232 | tx_cmd->sec_ctl = TX_CMD_SEC_CCM; | |
233 | memcpy(tx_cmd->key, keyconf->key, keyconf->keylen); | |
234 | if (info->flags & IEEE80211_TX_CTL_AMPDU) | |
235 | tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_CCMP_AGG); | |
236 | break; | |
237 | ||
238 | case WLAN_CIPHER_SUITE_TKIP: | |
239 | tx_cmd->sec_ctl = TX_CMD_SEC_TKIP; | |
240 | ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key); | |
241 | break; | |
242 | ||
243 | case WLAN_CIPHER_SUITE_WEP104: | |
244 | tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128; | |
245 | /* fall through */ | |
246 | case WLAN_CIPHER_SUITE_WEP40: | |
247 | tx_cmd->sec_ctl |= TX_CMD_SEC_WEP | | |
248 | ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) & | |
249 | TX_CMD_SEC_WEP_KEY_IDX_MSK); | |
250 | ||
251 | memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen); | |
252 | break; | |
253 | default: | |
254 | IWL_ERR(mvm, "Unknown encode cipher %x\n", keyconf->cipher); | |
255 | break; | |
256 | } | |
257 | } | |
258 | ||
259 | /* | |
260 | * Allocates and sets the Tx cmd the driver data pointers in the skb | |
261 | */ | |
262 | static struct iwl_device_cmd * | |
263 | iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb, | |
264 | struct ieee80211_sta *sta, u8 sta_id) | |
265 | { | |
266 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
267 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
268 | struct iwl_device_cmd *dev_cmd; | |
269 | struct iwl_tx_cmd *tx_cmd; | |
270 | ||
271 | dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans); | |
272 | ||
273 | if (unlikely(!dev_cmd)) | |
274 | return NULL; | |
275 | ||
276 | memset(dev_cmd, 0, sizeof(*dev_cmd)); | |
277 | tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; | |
278 | ||
279 | if (info->control.hw_key) | |
280 | iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb); | |
281 | ||
282 | iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id); | |
283 | ||
284 | iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control); | |
285 | ||
286 | memset(&info->status, 0, sizeof(info->status)); | |
287 | ||
288 | info->driver_data[0] = NULL; | |
289 | info->driver_data[1] = dev_cmd; | |
290 | ||
291 | return dev_cmd; | |
292 | } | |
293 | ||
294 | int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb) | |
295 | { | |
296 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
297 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
298 | struct iwl_device_cmd *dev_cmd; | |
299 | struct iwl_tx_cmd *tx_cmd; | |
300 | u8 sta_id; | |
301 | ||
302 | if (WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU)) | |
303 | return -1; | |
304 | ||
305 | if (WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM && | |
306 | (!info->control.vif || | |
307 | info->hw_queue != info->control.vif->cab_queue))) | |
308 | return -1; | |
309 | ||
310 | /* | |
311 | * If the interface on which frame is sent is the P2P_DEVICE | |
312 | * or an AP/GO interface use the broadcast station associated | |
313 | * with it; otherwise use the AUX station. | |
314 | */ | |
315 | if (info->control.vif && | |
316 | (info->control.vif->type == NL80211_IFTYPE_P2P_DEVICE || | |
317 | info->control.vif->type == NL80211_IFTYPE_AP)) { | |
318 | struct iwl_mvm_vif *mvmvif = | |
319 | iwl_mvm_vif_from_mac80211(info->control.vif); | |
320 | sta_id = mvmvif->bcast_sta.sta_id; | |
321 | } else { | |
322 | sta_id = mvm->aux_sta.sta_id; | |
323 | } | |
324 | ||
325 | IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, info->hw_queue); | |
326 | ||
327 | dev_cmd = iwl_mvm_set_tx_params(mvm, skb, NULL, sta_id); | |
328 | if (!dev_cmd) | |
329 | return -1; | |
330 | ||
331 | /* From now on, we cannot access info->control */ | |
332 | tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; | |
333 | ||
334 | /* Copy MAC header from skb into command buffer */ | |
335 | memcpy(tx_cmd->hdr, hdr, ieee80211_hdrlen(hdr->frame_control)); | |
336 | ||
337 | if (iwl_trans_tx(mvm->trans, skb, dev_cmd, info->hw_queue)) { | |
338 | iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); | |
339 | return -1; | |
340 | } | |
341 | ||
342 | return 0; | |
343 | } | |
344 | ||
345 | /* | |
346 | * Sets the fields in the Tx cmd that are crypto related | |
347 | */ | |
348 | int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb, | |
349 | struct ieee80211_sta *sta) | |
350 | { | |
351 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
352 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
353 | struct iwl_mvm_sta *mvmsta; | |
354 | struct iwl_device_cmd *dev_cmd; | |
355 | struct iwl_tx_cmd *tx_cmd; | |
356 | __le16 fc; | |
357 | u16 seq_number = 0; | |
358 | u8 tid = IWL_MAX_TID_COUNT; | |
359 | u8 txq_id = info->hw_queue; | |
360 | bool is_data_qos = false, is_ampdu = false; | |
361 | ||
362 | mvmsta = (void *)sta->drv_priv; | |
363 | fc = hdr->frame_control; | |
364 | ||
365 | if (WARN_ON_ONCE(!mvmsta)) | |
366 | return -1; | |
367 | ||
368 | if (WARN_ON_ONCE(mvmsta->sta_id == IWL_INVALID_STATION)) | |
369 | return -1; | |
370 | ||
371 | dev_cmd = iwl_mvm_set_tx_params(mvm, skb, sta, mvmsta->sta_id); | |
372 | if (!dev_cmd) | |
373 | goto drop; | |
374 | ||
375 | tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; | |
376 | /* From now on, we cannot access info->control */ | |
377 | ||
378 | spin_lock(&mvmsta->lock); | |
379 | ||
380 | if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) { | |
381 | u8 *qc = NULL; | |
382 | qc = ieee80211_get_qos_ctl(hdr); | |
383 | tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK; | |
384 | if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) | |
385 | goto drop_unlock_sta; | |
386 | ||
387 | seq_number = mvmsta->tid_data[tid].seq_number; | |
388 | seq_number &= IEEE80211_SCTL_SEQ; | |
389 | hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); | |
390 | hdr->seq_ctrl |= cpu_to_le16(seq_number); | |
391 | seq_number += 0x10; | |
392 | is_data_qos = true; | |
393 | is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU; | |
394 | } | |
395 | ||
396 | /* Copy MAC header from skb into command buffer */ | |
397 | memcpy(tx_cmd->hdr, hdr, ieee80211_hdrlen(fc)); | |
398 | ||
399 | WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM); | |
400 | ||
401 | if (is_ampdu) { | |
402 | if (WARN_ON_ONCE(mvmsta->tid_data[tid].state != IWL_AGG_ON)) | |
403 | goto drop_unlock_sta; | |
404 | txq_id = mvmsta->tid_data[tid].txq_id; | |
405 | } | |
406 | ||
407 | IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id, | |
408 | tid, txq_id, seq_number); | |
409 | ||
410 | /* NOTE: aggregation will need changes here (for txq id) */ | |
411 | if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id)) | |
412 | goto drop_unlock_sta; | |
413 | ||
414 | if (is_data_qos && !ieee80211_has_morefrags(fc)) | |
415 | mvmsta->tid_data[tid].seq_number = seq_number; | |
416 | ||
417 | spin_unlock(&mvmsta->lock); | |
418 | ||
419 | if (mvmsta->vif->type == NL80211_IFTYPE_AP && | |
420 | txq_id < IWL_FIRST_AMPDU_QUEUE) | |
421 | atomic_inc(&mvmsta->pending_frames); | |
422 | ||
423 | return 0; | |
424 | ||
425 | drop_unlock_sta: | |
426 | iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); | |
427 | spin_unlock(&mvmsta->lock); | |
428 | drop: | |
429 | return -1; | |
430 | } | |
431 | ||
432 | static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm, | |
433 | struct ieee80211_sta *sta, u8 tid) | |
434 | { | |
435 | struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv; | |
436 | struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; | |
437 | struct ieee80211_vif *vif = mvmsta->vif; | |
438 | ||
439 | lockdep_assert_held(&mvmsta->lock); | |
440 | ||
441 | if (tid_data->ssn != tid_data->next_reclaimed) | |
442 | return; | |
443 | ||
444 | switch (tid_data->state) { | |
445 | case IWL_EMPTYING_HW_QUEUE_ADDBA: | |
446 | IWL_DEBUG_TX_QUEUES(mvm, | |
447 | "Can continue addBA flow ssn = next_recl = %d\n", | |
448 | tid_data->next_reclaimed); | |
449 | tid_data->state = IWL_AGG_STARTING; | |
450 | ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); | |
451 | break; | |
452 | ||
453 | case IWL_EMPTYING_HW_QUEUE_DELBA: | |
454 | IWL_DEBUG_TX_QUEUES(mvm, | |
455 | "Can continue DELBA flow ssn = next_recl = %d\n", | |
456 | tid_data->next_reclaimed); | |
457 | iwl_trans_txq_disable(mvm->trans, tid_data->txq_id); | |
458 | tid_data->state = IWL_AGG_OFF; | |
459 | /* | |
460 | * we can't hold the mutex - but since we are after a sequence | |
461 | * point (call to iwl_trans_txq_disable), so we don't even need | |
462 | * a memory barrier. | |
463 | */ | |
464 | mvm->queue_to_mac80211[tid_data->txq_id] = | |
465 | IWL_INVALID_MAC80211_QUEUE; | |
466 | ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); | |
467 | break; | |
468 | ||
469 | default: | |
470 | break; | |
471 | } | |
472 | } | |
473 | ||
474 | #ifdef CONFIG_IWLWIFI_DEBUG | |
475 | const char *iwl_mvm_get_tx_fail_reason(u32 status) | |
476 | { | |
477 | #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x | |
478 | #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x | |
479 | ||
480 | switch (status & TX_STATUS_MSK) { | |
481 | case TX_STATUS_SUCCESS: | |
482 | return "SUCCESS"; | |
483 | TX_STATUS_POSTPONE(DELAY); | |
484 | TX_STATUS_POSTPONE(FEW_BYTES); | |
485 | TX_STATUS_POSTPONE(BT_PRIO); | |
486 | TX_STATUS_POSTPONE(QUIET_PERIOD); | |
487 | TX_STATUS_POSTPONE(CALC_TTAK); | |
488 | TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY); | |
489 | TX_STATUS_FAIL(SHORT_LIMIT); | |
490 | TX_STATUS_FAIL(LONG_LIMIT); | |
491 | TX_STATUS_FAIL(UNDERRUN); | |
492 | TX_STATUS_FAIL(DRAIN_FLOW); | |
493 | TX_STATUS_FAIL(RFKILL_FLUSH); | |
494 | TX_STATUS_FAIL(LIFE_EXPIRE); | |
495 | TX_STATUS_FAIL(DEST_PS); | |
496 | TX_STATUS_FAIL(HOST_ABORTED); | |
497 | TX_STATUS_FAIL(BT_RETRY); | |
498 | TX_STATUS_FAIL(STA_INVALID); | |
499 | TX_STATUS_FAIL(FRAG_DROPPED); | |
500 | TX_STATUS_FAIL(TID_DISABLE); | |
501 | TX_STATUS_FAIL(FIFO_FLUSHED); | |
502 | TX_STATUS_FAIL(SMALL_CF_POLL); | |
503 | TX_STATUS_FAIL(FW_DROP); | |
504 | TX_STATUS_FAIL(STA_COLOR_MISMATCH); | |
505 | } | |
506 | ||
507 | return "UNKNOWN"; | |
508 | ||
509 | #undef TX_STATUS_FAIL | |
510 | #undef TX_STATUS_POSTPONE | |
511 | } | |
512 | #endif /* CONFIG_IWLWIFI_DEBUG */ | |
513 | ||
514 | /** | |
515 | * translate ucode response to mac80211 tx status control values | |
516 | */ | |
517 | static void iwl_mvm_hwrate_to_tx_control(u32 rate_n_flags, | |
518 | struct ieee80211_tx_info *info) | |
519 | { | |
520 | struct ieee80211_tx_rate *r = &info->status.rates[0]; | |
521 | ||
522 | info->status.antenna = | |
523 | ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS); | |
524 | if (rate_n_flags & RATE_HT_MCS_GF_MSK) | |
525 | r->flags |= IEEE80211_TX_RC_GREEN_FIELD; | |
526 | switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { | |
527 | case RATE_MCS_CHAN_WIDTH_20: | |
528 | break; | |
529 | case RATE_MCS_CHAN_WIDTH_40: | |
530 | r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; | |
531 | break; | |
532 | case RATE_MCS_CHAN_WIDTH_80: | |
533 | r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH; | |
534 | break; | |
535 | case RATE_MCS_CHAN_WIDTH_160: | |
536 | r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH; | |
537 | break; | |
538 | } | |
539 | if (rate_n_flags & RATE_MCS_SGI_MSK) | |
540 | r->flags |= IEEE80211_TX_RC_SHORT_GI; | |
541 | if (rate_n_flags & RATE_MCS_HT_MSK) { | |
542 | r->flags |= IEEE80211_TX_RC_MCS; | |
543 | r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK; | |
544 | } else if (rate_n_flags & RATE_MCS_VHT_MSK) { | |
545 | ieee80211_rate_set_vht( | |
546 | r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK, | |
547 | ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> | |
548 | RATE_VHT_MCS_NSS_POS) + 1); | |
549 | r->flags |= IEEE80211_TX_RC_VHT_MCS; | |
550 | } else { | |
551 | r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, | |
552 | info->band); | |
553 | } | |
554 | } | |
555 | ||
556 | static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm, | |
557 | struct iwl_rx_packet *pkt) | |
558 | { | |
559 | struct ieee80211_sta *sta; | |
560 | u16 sequence = le16_to_cpu(pkt->hdr.sequence); | |
561 | int txq_id = SEQ_TO_QUEUE(sequence); | |
562 | struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; | |
563 | int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); | |
564 | int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); | |
565 | u32 status = le16_to_cpu(tx_resp->status.status); | |
566 | u16 ssn = iwl_mvm_get_scd_ssn(tx_resp); | |
567 | struct iwl_mvm_sta *mvmsta; | |
568 | struct sk_buff_head skbs; | |
569 | u8 skb_freed = 0; | |
570 | u16 next_reclaimed, seq_ctl; | |
571 | ||
572 | __skb_queue_head_init(&skbs); | |
573 | ||
574 | seq_ctl = le16_to_cpu(tx_resp->seq_ctl); | |
575 | ||
576 | /* we can free until ssn % q.n_bd not inclusive */ | |
577 | iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs); | |
578 | ||
579 | while (!skb_queue_empty(&skbs)) { | |
580 | struct sk_buff *skb = __skb_dequeue(&skbs); | |
581 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
582 | ||
583 | skb_freed++; | |
584 | ||
585 | iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); | |
586 | ||
587 | memset(&info->status, 0, sizeof(info->status)); | |
588 | ||
589 | info->flags &= ~IEEE80211_TX_CTL_AMPDU; | |
590 | ||
591 | /* inform mac80211 about what happened with the frame */ | |
592 | switch (status & TX_STATUS_MSK) { | |
593 | case TX_STATUS_SUCCESS: | |
594 | case TX_STATUS_DIRECT_DONE: | |
595 | info->flags |= IEEE80211_TX_STAT_ACK; | |
596 | break; | |
597 | case TX_STATUS_FAIL_DEST_PS: | |
598 | info->flags |= IEEE80211_TX_STAT_TX_FILTERED; | |
599 | break; | |
600 | default: | |
601 | break; | |
602 | } | |
603 | ||
604 | info->status.rates[0].count = tx_resp->failure_frame + 1; | |
605 | iwl_mvm_hwrate_to_tx_control(le32_to_cpu(tx_resp->initial_rate), | |
606 | info); | |
607 | ||
608 | /* Single frame failure in an AMPDU queue => send BAR */ | |
609 | if (txq_id >= IWL_FIRST_AMPDU_QUEUE && | |
610 | !(info->flags & IEEE80211_TX_STAT_ACK)) { | |
611 | /* there must be only one skb in the skb_list */ | |
612 | WARN_ON_ONCE(skb_freed > 1 || | |
613 | !skb_queue_empty(&skbs)); | |
614 | info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; | |
615 | } | |
616 | ||
617 | /* W/A FW bug: seq_ctl is wrong when the queue is flushed */ | |
618 | if (status == TX_STATUS_FAIL_FIFO_FLUSHED) { | |
619 | struct ieee80211_hdr *hdr = (void *)skb->data; | |
620 | seq_ctl = le16_to_cpu(hdr->seq_ctrl); | |
621 | } | |
622 | ||
623 | ieee80211_tx_status(mvm->hw, skb); | |
624 | } | |
625 | ||
626 | if (txq_id >= IWL_FIRST_AMPDU_QUEUE) { | |
627 | /* If this is an aggregation queue, we use the ssn since: | |
628 | * ssn = wifi seq_num % 256. | |
629 | * The seq_ctl is the sequence control of the packet to which | |
630 | * this Tx response relates. But if there is a hole in the | |
631 | * bitmap of the BA we received, this Tx response may allow to | |
632 | * reclaim the hole and all the subsequent packets that were | |
633 | * already acked. In that case, seq_ctl != ssn, and the next | |
634 | * packet to be reclaimed will be ssn and not seq_ctl. In that | |
635 | * case, several packets will be reclaimed even if | |
636 | * frame_count = 1. | |
637 | * | |
638 | * The ssn is the index (% 256) of the latest packet that has | |
639 | * treated (acked / dropped) + 1. | |
640 | */ | |
641 | next_reclaimed = ssn; | |
642 | } else { | |
643 | /* The next packet to be reclaimed is the one after this one */ | |
644 | next_reclaimed = SEQ_TO_SN(seq_ctl + 0x10); | |
645 | } | |
646 | ||
647 | IWL_DEBUG_TX_REPLY(mvm, | |
648 | "TXQ %d status %s (0x%08x)\n\t\t\t\tinitial_rate 0x%x " | |
649 | "retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n", | |
650 | txq_id, iwl_mvm_get_tx_fail_reason(status), | |
651 | status, le32_to_cpu(tx_resp->initial_rate), | |
652 | tx_resp->failure_frame, SEQ_TO_INDEX(sequence), | |
653 | ssn, next_reclaimed, seq_ctl); | |
654 | ||
655 | rcu_read_lock(); | |
656 | ||
657 | sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); | |
658 | ||
659 | if (!IS_ERR_OR_NULL(sta)) { | |
660 | mvmsta = (void *)sta->drv_priv; | |
661 | ||
662 | if (tid != IWL_TID_NON_QOS) { | |
663 | struct iwl_mvm_tid_data *tid_data = | |
664 | &mvmsta->tid_data[tid]; | |
665 | ||
666 | spin_lock(&mvmsta->lock); | |
667 | tid_data->next_reclaimed = next_reclaimed; | |
668 | IWL_DEBUG_TX_REPLY(mvm, "Next reclaimed packet:%d\n", | |
669 | next_reclaimed); | |
670 | iwl_mvm_check_ratid_empty(mvm, sta, tid); | |
671 | spin_unlock(&mvmsta->lock); | |
672 | } | |
673 | ||
674 | #ifdef CONFIG_PM_SLEEP | |
675 | mvmsta->last_seq_ctl = seq_ctl; | |
676 | #endif | |
677 | } else { | |
678 | sta = NULL; | |
679 | mvmsta = NULL; | |
680 | } | |
681 | ||
682 | /* | |
683 | * If the txq is not an AMPDU queue, there is no chance we freed | |
684 | * several skbs. Check that out... | |
685 | * If there are no pending frames for this STA, notify mac80211 that | |
686 | * this station can go to sleep in its STA table. | |
687 | */ | |
688 | if (txq_id < IWL_FIRST_AMPDU_QUEUE && mvmsta && | |
689 | !WARN_ON(skb_freed > 1) && | |
690 | mvmsta->vif->type == NL80211_IFTYPE_AP && | |
691 | atomic_sub_and_test(skb_freed, &mvmsta->pending_frames)) { | |
692 | ieee80211_sta_block_awake(mvm->hw, sta, false); | |
693 | set_bit(sta_id, mvm->sta_drained); | |
694 | schedule_work(&mvm->sta_drained_wk); | |
695 | } | |
696 | ||
697 | rcu_read_unlock(); | |
698 | } | |
699 | ||
700 | #ifdef CONFIG_IWLWIFI_DEBUG | |
701 | #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x | |
702 | static const char *iwl_get_agg_tx_status(u16 status) | |
703 | { | |
704 | switch (status & AGG_TX_STATE_STATUS_MSK) { | |
705 | AGG_TX_STATE_(TRANSMITTED); | |
706 | AGG_TX_STATE_(UNDERRUN); | |
707 | AGG_TX_STATE_(BT_PRIO); | |
708 | AGG_TX_STATE_(FEW_BYTES); | |
709 | AGG_TX_STATE_(ABORT); | |
710 | AGG_TX_STATE_(LAST_SENT_TTL); | |
711 | AGG_TX_STATE_(LAST_SENT_TRY_CNT); | |
712 | AGG_TX_STATE_(LAST_SENT_BT_KILL); | |
713 | AGG_TX_STATE_(SCD_QUERY); | |
714 | AGG_TX_STATE_(TEST_BAD_CRC32); | |
715 | AGG_TX_STATE_(RESPONSE); | |
716 | AGG_TX_STATE_(DUMP_TX); | |
717 | AGG_TX_STATE_(DELAY_TX); | |
718 | } | |
719 | ||
720 | return "UNKNOWN"; | |
721 | } | |
722 | ||
723 | static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, | |
724 | struct iwl_rx_packet *pkt) | |
725 | { | |
726 | struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; | |
727 | struct agg_tx_status *frame_status = &tx_resp->status; | |
728 | int i; | |
729 | ||
730 | for (i = 0; i < tx_resp->frame_count; i++) { | |
731 | u16 fstatus = le16_to_cpu(frame_status[i].status); | |
732 | ||
733 | IWL_DEBUG_TX_REPLY(mvm, | |
734 | "status %s (0x%04x), try-count (%d) seq (0x%x)\n", | |
735 | iwl_get_agg_tx_status(fstatus), | |
736 | fstatus & AGG_TX_STATE_STATUS_MSK, | |
737 | (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >> | |
738 | AGG_TX_STATE_TRY_CNT_POS, | |
739 | le16_to_cpu(frame_status[i].sequence)); | |
740 | } | |
741 | } | |
742 | #else | |
743 | static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, | |
744 | struct iwl_rx_packet *pkt) | |
745 | {} | |
746 | #endif /* CONFIG_IWLWIFI_DEBUG */ | |
747 | ||
748 | static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm, | |
749 | struct iwl_rx_packet *pkt) | |
750 | { | |
751 | struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; | |
752 | int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); | |
753 | int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); | |
754 | u16 sequence = le16_to_cpu(pkt->hdr.sequence); | |
755 | struct ieee80211_sta *sta; | |
756 | ||
757 | if (WARN_ON_ONCE(SEQ_TO_QUEUE(sequence) < IWL_FIRST_AMPDU_QUEUE)) | |
758 | return; | |
759 | ||
760 | if (WARN_ON_ONCE(tid == IWL_TID_NON_QOS)) | |
761 | return; | |
762 | ||
763 | iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt); | |
764 | ||
765 | rcu_read_lock(); | |
766 | ||
767 | sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); | |
768 | ||
769 | if (!WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { | |
770 | struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv; | |
771 | mvmsta->tid_data[tid].rate_n_flags = | |
772 | le32_to_cpu(tx_resp->initial_rate); | |
773 | } | |
774 | ||
775 | rcu_read_unlock(); | |
776 | } | |
777 | ||
778 | int iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb, | |
779 | struct iwl_device_cmd *cmd) | |
780 | { | |
781 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
782 | struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; | |
783 | ||
784 | if (tx_resp->frame_count == 1) | |
785 | iwl_mvm_rx_tx_cmd_single(mvm, pkt); | |
786 | else | |
787 | iwl_mvm_rx_tx_cmd_agg(mvm, pkt); | |
788 | ||
789 | return 0; | |
790 | } | |
791 | ||
792 | int iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb, | |
793 | struct iwl_device_cmd *cmd) | |
794 | { | |
795 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
796 | struct iwl_mvm_ba_notif *ba_notif = (void *)pkt->data; | |
797 | struct sk_buff_head reclaimed_skbs; | |
798 | struct iwl_mvm_tid_data *tid_data; | |
799 | struct ieee80211_tx_info *info; | |
800 | struct ieee80211_sta *sta; | |
801 | struct iwl_mvm_sta *mvmsta; | |
802 | struct ieee80211_hdr *hdr; | |
803 | struct sk_buff *skb; | |
804 | int sta_id, tid, freed; | |
805 | ||
806 | /* "flow" corresponds to Tx queue */ | |
807 | u16 scd_flow = le16_to_cpu(ba_notif->scd_flow); | |
808 | ||
809 | /* "ssn" is start of block-ack Tx window, corresponds to index | |
810 | * (in Tx queue's circular buffer) of first TFD/frame in window */ | |
811 | u16 ba_resp_scd_ssn = le16_to_cpu(ba_notif->scd_ssn); | |
812 | ||
813 | sta_id = ba_notif->sta_id; | |
814 | tid = ba_notif->tid; | |
815 | ||
816 | rcu_read_lock(); | |
817 | ||
818 | sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); | |
819 | ||
820 | /* Reclaiming frames for a station that has been deleted ? */ | |
821 | if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { | |
822 | rcu_read_unlock(); | |
823 | return 0; | |
824 | } | |
825 | ||
826 | mvmsta = (void *)sta->drv_priv; | |
827 | tid_data = &mvmsta->tid_data[tid]; | |
828 | ||
829 | if (WARN_ONCE(tid_data->txq_id != scd_flow, "Q %d, tid %d, flow %d", | |
830 | tid_data->txq_id, tid, scd_flow)) { | |
831 | rcu_read_unlock(); | |
832 | return 0; | |
833 | } | |
834 | ||
835 | spin_lock(&mvmsta->lock); | |
836 | ||
837 | __skb_queue_head_init(&reclaimed_skbs); | |
838 | ||
839 | /* | |
840 | * Release all TFDs before the SSN, i.e. all TFDs in front of | |
841 | * block-ack window (we assume that they've been successfully | |
842 | * transmitted ... if not, it's too late anyway). | |
843 | */ | |
844 | iwl_trans_reclaim(mvm->trans, scd_flow, ba_resp_scd_ssn, | |
845 | &reclaimed_skbs); | |
846 | ||
847 | IWL_DEBUG_TX_REPLY(mvm, | |
848 | "BA_NOTIFICATION Received from %pM, sta_id = %d\n", | |
849 | (u8 *)&ba_notif->sta_addr_lo32, | |
850 | ba_notif->sta_id); | |
851 | IWL_DEBUG_TX_REPLY(mvm, | |
852 | "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n", | |
853 | ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl), | |
854 | (unsigned long long)le64_to_cpu(ba_notif->bitmap), | |
855 | scd_flow, ba_resp_scd_ssn, ba_notif->txed, | |
856 | ba_notif->txed_2_done); | |
857 | ||
858 | tid_data->next_reclaimed = ba_resp_scd_ssn; | |
859 | ||
860 | iwl_mvm_check_ratid_empty(mvm, sta, tid); | |
861 | ||
862 | freed = 0; | |
863 | ||
864 | skb_queue_walk(&reclaimed_skbs, skb) { | |
865 | hdr = (struct ieee80211_hdr *)skb->data; | |
866 | ||
867 | if (ieee80211_is_data_qos(hdr->frame_control)) | |
868 | freed++; | |
869 | else | |
870 | WARN_ON_ONCE(1); | |
871 | ||
872 | info = IEEE80211_SKB_CB(skb); | |
873 | iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); | |
874 | ||
875 | if (freed == 1) { | |
876 | /* this is the first skb we deliver in this batch */ | |
877 | /* put the rate scaling data there */ | |
878 | info = IEEE80211_SKB_CB(skb); | |
879 | memset(&info->status, 0, sizeof(info->status)); | |
880 | info->flags |= IEEE80211_TX_STAT_ACK; | |
881 | info->flags |= IEEE80211_TX_STAT_AMPDU; | |
882 | info->status.ampdu_ack_len = ba_notif->txed_2_done; | |
883 | info->status.ampdu_len = ba_notif->txed; | |
884 | iwl_mvm_hwrate_to_tx_control(tid_data->rate_n_flags, | |
885 | info); | |
886 | } | |
887 | } | |
888 | ||
889 | spin_unlock(&mvmsta->lock); | |
890 | ||
891 | rcu_read_unlock(); | |
892 | ||
893 | while (!skb_queue_empty(&reclaimed_skbs)) { | |
894 | skb = __skb_dequeue(&reclaimed_skbs); | |
895 | ieee80211_tx_status(mvm->hw, skb); | |
896 | } | |
897 | ||
898 | return 0; | |
899 | } | |
900 | ||
901 | int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, bool sync) | |
902 | { | |
903 | int ret; | |
904 | struct iwl_tx_path_flush_cmd flush_cmd = { | |
905 | .queues_ctl = cpu_to_le32(tfd_msk), | |
906 | .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH), | |
907 | }; | |
908 | ||
909 | u32 flags = sync ? CMD_SYNC : CMD_ASYNC; | |
910 | ||
911 | ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags, | |
912 | sizeof(flush_cmd), &flush_cmd); | |
913 | if (ret) | |
914 | IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); | |
915 | return ret; | |
916 | } |