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cfg80211: remove enum ieee80211_band
[mirror_ubuntu-bionic-kernel.git] / drivers / net / wireless / intel / 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 * Copyright(c) 2016 Intel Deutschland GmbH
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of version 2 of the GNU General Public License as
14 * published by the Free Software Foundation.
15 *
16 * This program is distributed in the hope that it will be useful, but
17 * WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 * General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
24 * USA
25 *
26 * The full GNU General Public License is included in this distribution
27 * in the file called COPYING.
28 *
29 * Contact Information:
30 * Intel Linux Wireless <linuxwifi@intel.com>
31 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
32 *
33 * BSD LICENSE
34 *
35 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
36 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
37 * All rights reserved.
38 *
39 * Redistribution and use in source and binary forms, with or without
40 * modification, are permitted provided that the following conditions
41 * are met:
42 *
43 * * Redistributions of source code must retain the above copyright
44 * notice, this list of conditions and the following disclaimer.
45 * * Redistributions in binary form must reproduce the above copyright
46 * notice, this list of conditions and the following disclaimer in
47 * the documentation and/or other materials provided with the
48 * distribution.
49 * * Neither the name Intel Corporation nor the names of its
50 * contributors may be used to endorse or promote products derived
51 * from this software without specific prior written permission.
52 *
53 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
54 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
55 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
56 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
57 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
58 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
59 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
60 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
61 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
62 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
63 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
64 *
65 *****************************************************************************/
66 #include <linux/ieee80211.h>
67 #include <linux/etherdevice.h>
68 #include <linux/tcp.h>
69 #include <net/ip.h>
70 #include <net/ipv6.h>
71
72 #include "iwl-trans.h"
73 #include "iwl-eeprom-parse.h"
74 #include "mvm.h"
75 #include "sta.h"
76 #include "fw-dbg.h"
77
78 static void
79 iwl_mvm_bar_check_trigger(struct iwl_mvm *mvm, const u8 *addr,
80 u16 tid, u16 ssn)
81 {
82 struct iwl_fw_dbg_trigger_tlv *trig;
83 struct iwl_fw_dbg_trigger_ba *ba_trig;
84
85 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
86 return;
87
88 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
89 ba_trig = (void *)trig->data;
90
91 if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig))
92 return;
93
94 if (!(le16_to_cpu(ba_trig->tx_bar) & BIT(tid)))
95 return;
96
97 iwl_mvm_fw_dbg_collect_trig(mvm, trig,
98 "BAR sent to %pM, tid %d, ssn %d",
99 addr, tid, ssn);
100 }
101
102 #define OPT_HDR(type, skb, off) \
103 (type *)(skb_network_header(skb) + (off))
104
105 static void iwl_mvm_tx_csum(struct iwl_mvm *mvm, struct sk_buff *skb,
106 struct ieee80211_hdr *hdr,
107 struct ieee80211_tx_info *info,
108 struct iwl_tx_cmd *tx_cmd)
109 {
110 #if IS_ENABLED(CONFIG_INET)
111 u16 mh_len = ieee80211_hdrlen(hdr->frame_control);
112 u16 offload_assist = le16_to_cpu(tx_cmd->offload_assist);
113 u8 protocol = 0;
114
115 /*
116 * Do not compute checksum if already computed or if transport will
117 * compute it
118 */
119 if (skb->ip_summed != CHECKSUM_PARTIAL || IWL_MVM_SW_TX_CSUM_OFFLOAD)
120 return;
121
122 /* We do not expect to be requested to csum stuff we do not support */
123 if (WARN_ONCE(!(mvm->hw->netdev_features & IWL_TX_CSUM_NETIF_FLAGS) ||
124 (skb->protocol != htons(ETH_P_IP) &&
125 skb->protocol != htons(ETH_P_IPV6)),
126 "No support for requested checksum\n")) {
127 skb_checksum_help(skb);
128 return;
129 }
130
131 if (skb->protocol == htons(ETH_P_IP)) {
132 protocol = ip_hdr(skb)->protocol;
133 } else {
134 #if IS_ENABLED(CONFIG_IPV6)
135 struct ipv6hdr *ipv6h =
136 (struct ipv6hdr *)skb_network_header(skb);
137 unsigned int off = sizeof(*ipv6h);
138
139 protocol = ipv6h->nexthdr;
140 while (protocol != NEXTHDR_NONE && ipv6_ext_hdr(protocol)) {
141 /* only supported extension headers */
142 if (protocol != NEXTHDR_ROUTING &&
143 protocol != NEXTHDR_HOP &&
144 protocol != NEXTHDR_DEST &&
145 protocol != NEXTHDR_FRAGMENT) {
146 skb_checksum_help(skb);
147 return;
148 }
149
150 if (protocol == NEXTHDR_FRAGMENT) {
151 struct frag_hdr *hp =
152 OPT_HDR(struct frag_hdr, skb, off);
153
154 protocol = hp->nexthdr;
155 off += sizeof(struct frag_hdr);
156 } else {
157 struct ipv6_opt_hdr *hp =
158 OPT_HDR(struct ipv6_opt_hdr, skb, off);
159
160 protocol = hp->nexthdr;
161 off += ipv6_optlen(hp);
162 }
163 }
164 /* if we get here - protocol now should be TCP/UDP */
165 #endif
166 }
167
168 if (protocol != IPPROTO_TCP && protocol != IPPROTO_UDP) {
169 WARN_ON_ONCE(1);
170 skb_checksum_help(skb);
171 return;
172 }
173
174 /* enable L4 csum */
175 offload_assist |= BIT(TX_CMD_OFFLD_L4_EN);
176
177 /*
178 * Set offset to IP header (snap).
179 * We don't support tunneling so no need to take care of inner header.
180 * Size is in words.
181 */
182 offload_assist |= (4 << TX_CMD_OFFLD_IP_HDR);
183
184 /* Do IPv4 csum for AMSDU only (no IP csum for Ipv6) */
185 if (skb->protocol == htons(ETH_P_IP) &&
186 (offload_assist & BIT(TX_CMD_OFFLD_AMSDU))) {
187 ip_hdr(skb)->check = 0;
188 offload_assist |= BIT(TX_CMD_OFFLD_L3_EN);
189 }
190
191 /* reset UDP/TCP header csum */
192 if (protocol == IPPROTO_TCP)
193 tcp_hdr(skb)->check = 0;
194 else
195 udp_hdr(skb)->check = 0;
196
197 /* mac header len should include IV, size is in words */
198 if (info->control.hw_key)
199 mh_len += info->control.hw_key->iv_len;
200 mh_len /= 2;
201 offload_assist |= mh_len << TX_CMD_OFFLD_MH_SIZE;
202
203 tx_cmd->offload_assist = cpu_to_le16(offload_assist);
204 #endif
205 }
206
207 /*
208 * Sets most of the Tx cmd's fields
209 */
210 void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb,
211 struct iwl_tx_cmd *tx_cmd,
212 struct ieee80211_tx_info *info, u8 sta_id)
213 {
214 struct ieee80211_hdr *hdr = (void *)skb->data;
215 __le16 fc = hdr->frame_control;
216 u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags);
217 u32 len = skb->len + FCS_LEN;
218 u8 ac;
219
220 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
221 tx_flags |= TX_CMD_FLG_ACK;
222 else
223 tx_flags &= ~TX_CMD_FLG_ACK;
224
225 if (ieee80211_is_probe_resp(fc))
226 tx_flags |= TX_CMD_FLG_TSF;
227
228 if (ieee80211_has_morefrags(fc))
229 tx_flags |= TX_CMD_FLG_MORE_FRAG;
230
231 if (ieee80211_is_data_qos(fc)) {
232 u8 *qc = ieee80211_get_qos_ctl(hdr);
233 tx_cmd->tid_tspec = qc[0] & 0xf;
234 tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
235 if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT)
236 tx_cmd->offload_assist |=
237 cpu_to_le16(BIT(TX_CMD_OFFLD_AMSDU));
238 } else if (ieee80211_is_back_req(fc)) {
239 struct ieee80211_bar *bar = (void *)skb->data;
240 u16 control = le16_to_cpu(bar->control);
241 u16 ssn = le16_to_cpu(bar->start_seq_num);
242
243 tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR;
244 tx_cmd->tid_tspec = (control &
245 IEEE80211_BAR_CTRL_TID_INFO_MASK) >>
246 IEEE80211_BAR_CTRL_TID_INFO_SHIFT;
247 WARN_ON_ONCE(tx_cmd->tid_tspec >= IWL_MAX_TID_COUNT);
248 iwl_mvm_bar_check_trigger(mvm, bar->ra, tx_cmd->tid_tspec,
249 ssn);
250 } else {
251 tx_cmd->tid_tspec = IWL_TID_NON_QOS;
252 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
253 tx_flags |= TX_CMD_FLG_SEQ_CTL;
254 else
255 tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
256 }
257
258 /* Default to 0 (BE) when tid_spec is set to IWL_TID_NON_QOS */
259 if (tx_cmd->tid_tspec < IWL_MAX_TID_COUNT)
260 ac = tid_to_mac80211_ac[tx_cmd->tid_tspec];
261 else
262 ac = tid_to_mac80211_ac[0];
263
264 tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) <<
265 TX_CMD_FLG_BT_PRIO_POS;
266
267 if (ieee80211_is_mgmt(fc)) {
268 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
269 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_ASSOC);
270 else if (ieee80211_is_action(fc))
271 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
272 else
273 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
274
275 /* The spec allows Action frames in A-MPDU, we don't support
276 * it
277 */
278 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU);
279 } else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) {
280 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
281 } else {
282 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
283 }
284
285 if (ieee80211_is_data(fc) && len > mvm->rts_threshold &&
286 !is_multicast_ether_addr(ieee80211_get_DA(hdr)))
287 tx_flags |= TX_CMD_FLG_PROT_REQUIRE;
288
289 if (fw_has_capa(&mvm->fw->ucode_capa,
290 IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT) &&
291 ieee80211_action_contains_tpc(skb))
292 tx_flags |= TX_CMD_FLG_WRITE_TX_POWER;
293
294 tx_cmd->tx_flags = cpu_to_le32(tx_flags);
295 /* Total # bytes to be transmitted */
296 tx_cmd->len = cpu_to_le16((u16)skb->len +
297 (uintptr_t)info->driver_data[0]);
298 tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
299 tx_cmd->sta_id = sta_id;
300
301 /* padding is inserted later in transport */
302 if (ieee80211_hdrlen(fc) % 4 &&
303 !(tx_cmd->offload_assist & cpu_to_le16(BIT(TX_CMD_OFFLD_AMSDU))))
304 tx_cmd->offload_assist |= cpu_to_le16(BIT(TX_CMD_OFFLD_PAD));
305
306 iwl_mvm_tx_csum(mvm, skb, hdr, info, tx_cmd);
307 }
308
309 /*
310 * Sets the fields in the Tx cmd that are rate related
311 */
312 void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd,
313 struct ieee80211_tx_info *info,
314 struct ieee80211_sta *sta, __le16 fc)
315 {
316 u32 rate_flags;
317 int rate_idx;
318 u8 rate_plcp;
319
320 /* Set retry limit on RTS packets */
321 tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT;
322
323 /* Set retry limit on DATA packets and Probe Responses*/
324 if (ieee80211_is_probe_resp(fc)) {
325 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT;
326 tx_cmd->rts_retry_limit =
327 min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit);
328 } else if (ieee80211_is_back_req(fc)) {
329 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT;
330 } else {
331 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY;
332 }
333
334 /*
335 * for data packets, rate info comes from the table inside the fw. This
336 * table is controlled by LINK_QUALITY commands
337 */
338
339 if (ieee80211_is_data(fc) && sta) {
340 tx_cmd->initial_rate_index = 0;
341 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE);
342 return;
343 } else if (ieee80211_is_back_req(fc)) {
344 tx_cmd->tx_flags |=
345 cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR);
346 }
347
348 /* HT rate doesn't make sense for a non data frame */
349 WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS,
350 "Got an HT rate (flags:0x%x/mcs:%d) for a non data frame (fc:0x%x)\n",
351 info->control.rates[0].flags,
352 info->control.rates[0].idx,
353 le16_to_cpu(fc));
354
355 rate_idx = info->control.rates[0].idx;
356 /* if the rate isn't a well known legacy rate, take the lowest one */
357 if (rate_idx < 0 || rate_idx > IWL_RATE_COUNT_LEGACY)
358 rate_idx = rate_lowest_index(
359 &mvm->nvm_data->bands[info->band], sta);
360
361 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
362 if (info->band == NL80211_BAND_5GHZ)
363 rate_idx += IWL_FIRST_OFDM_RATE;
364
365 /* For 2.4 GHZ band, check that there is no need to remap */
366 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
367
368 /* Get PLCP rate for tx_cmd->rate_n_flags */
369 rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(rate_idx);
370
371 mvm->mgmt_last_antenna_idx =
372 iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm),
373 mvm->mgmt_last_antenna_idx);
374
375 if (info->band == NL80211_BAND_2GHZ &&
376 !iwl_mvm_bt_coex_is_shared_ant_avail(mvm))
377 rate_flags = mvm->cfg->non_shared_ant << RATE_MCS_ANT_POS;
378 else
379 rate_flags =
380 BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS;
381
382 /* Set CCK flag as needed */
383 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
384 rate_flags |= RATE_MCS_CCK_MSK;
385
386 /* Set the rate in the TX cmd */
387 tx_cmd->rate_n_flags = cpu_to_le32((u32)rate_plcp | rate_flags);
388 }
389
390 /*
391 * Sets the fields in the Tx cmd that are crypto related
392 */
393 static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm,
394 struct ieee80211_tx_info *info,
395 struct iwl_tx_cmd *tx_cmd,
396 struct sk_buff *skb_frag,
397 int hdrlen)
398 {
399 struct ieee80211_key_conf *keyconf = info->control.hw_key;
400 u8 *crypto_hdr = skb_frag->data + hdrlen;
401 u64 pn;
402
403 switch (keyconf->cipher) {
404 case WLAN_CIPHER_SUITE_CCMP:
405 case WLAN_CIPHER_SUITE_CCMP_256:
406 iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd);
407 pn = atomic64_inc_return(&keyconf->tx_pn);
408 crypto_hdr[0] = pn;
409 crypto_hdr[2] = 0;
410 crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6);
411 crypto_hdr[1] = pn >> 8;
412 crypto_hdr[4] = pn >> 16;
413 crypto_hdr[5] = pn >> 24;
414 crypto_hdr[6] = pn >> 32;
415 crypto_hdr[7] = pn >> 40;
416 break;
417
418 case WLAN_CIPHER_SUITE_TKIP:
419 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
420 pn = atomic64_inc_return(&keyconf->tx_pn);
421 ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn);
422 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
423 break;
424
425 case WLAN_CIPHER_SUITE_WEP104:
426 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
427 /* fall through */
428 case WLAN_CIPHER_SUITE_WEP40:
429 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP |
430 ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) &
431 TX_CMD_SEC_WEP_KEY_IDX_MSK);
432
433 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
434 break;
435 default:
436 tx_cmd->sec_ctl |= TX_CMD_SEC_EXT;
437 }
438 }
439
440 /*
441 * Allocates and sets the Tx cmd the driver data pointers in the skb
442 */
443 static struct iwl_device_cmd *
444 iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb,
445 int hdrlen, struct ieee80211_sta *sta, u8 sta_id)
446 {
447 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
448 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
449 struct iwl_device_cmd *dev_cmd;
450 struct iwl_tx_cmd *tx_cmd;
451
452 dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans);
453
454 if (unlikely(!dev_cmd))
455 return NULL;
456
457 memset(dev_cmd, 0, sizeof(*dev_cmd));
458 dev_cmd->hdr.cmd = TX_CMD;
459 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
460
461 if (info->control.hw_key)
462 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen);
463
464 iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id);
465
466 iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control);
467
468 memset(&info->status, 0, sizeof(info->status));
469 memset(info->driver_data, 0, sizeof(info->driver_data));
470
471 info->driver_data[1] = dev_cmd;
472
473 return dev_cmd;
474 }
475
476 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb)
477 {
478 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
479 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
480 struct iwl_device_cmd *dev_cmd;
481 struct iwl_tx_cmd *tx_cmd;
482 u8 sta_id;
483 int hdrlen = ieee80211_hdrlen(hdr->frame_control);
484
485 if (WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU))
486 return -1;
487
488 if (WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM &&
489 (!info->control.vif ||
490 info->hw_queue != info->control.vif->cab_queue)))
491 return -1;
492
493 /* This holds the amsdu headers length */
494 info->driver_data[0] = (void *)(uintptr_t)0;
495
496 /*
497 * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets that can be used
498 * in 2 different types of vifs, P2P & STATION. P2P uses the offchannel
499 * queue. STATION (HS2.0) uses the auxiliary context of the FW,
500 * and hence needs to be sent on the aux queue
501 */
502 if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
503 info->control.vif->type == NL80211_IFTYPE_STATION)
504 IEEE80211_SKB_CB(skb)->hw_queue = mvm->aux_queue;
505
506 /*
507 * If the interface on which the frame is sent is the P2P_DEVICE
508 * or an AP/GO interface use the broadcast station associated
509 * with it; otherwise if the interface is a managed interface
510 * use the AP station associated with it for multicast traffic
511 * (this is not possible for unicast packets as a TLDS discovery
512 * response are sent without a station entry); otherwise use the
513 * AUX station.
514 */
515 sta_id = mvm->aux_sta.sta_id;
516 if (info->control.vif) {
517 struct iwl_mvm_vif *mvmvif =
518 iwl_mvm_vif_from_mac80211(info->control.vif);
519
520 if (info->control.vif->type == NL80211_IFTYPE_P2P_DEVICE ||
521 info->control.vif->type == NL80211_IFTYPE_AP)
522 sta_id = mvmvif->bcast_sta.sta_id;
523 else if (info->control.vif->type == NL80211_IFTYPE_STATION &&
524 is_multicast_ether_addr(hdr->addr1)) {
525 u8 ap_sta_id = ACCESS_ONCE(mvmvif->ap_sta_id);
526
527 if (ap_sta_id != IWL_MVM_STATION_COUNT)
528 sta_id = ap_sta_id;
529 }
530 }
531
532 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, info->hw_queue);
533
534 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, hdrlen, NULL, sta_id);
535 if (!dev_cmd)
536 return -1;
537
538 /* From now on, we cannot access info->control */
539 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
540
541 /* Copy MAC header from skb into command buffer */
542 memcpy(tx_cmd->hdr, hdr, hdrlen);
543
544 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, info->hw_queue)) {
545 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
546 return -1;
547 }
548
549 /*
550 * Increase the pending frames counter, so that later when a reply comes
551 * in and the counter is decreased - we don't start getting negative
552 * values.
553 * Note that we don't need to make sure it isn't agg'd, since we're
554 * TXing non-sta
555 */
556 atomic_inc(&mvm->pending_frames[sta_id]);
557
558 return 0;
559 }
560
561 #ifdef CONFIG_INET
562 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
563 struct ieee80211_sta *sta,
564 struct sk_buff_head *mpdus_skb)
565 {
566 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
567 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
568 struct ieee80211_hdr *hdr = (void *)skb->data;
569 unsigned int mss = skb_shinfo(skb)->gso_size;
570 struct sk_buff *tmp, *next;
571 char cb[sizeof(skb->cb)];
572 unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len;
573 bool ipv4 = (skb->protocol == htons(ETH_P_IP));
574 u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0;
575 u16 amsdu_add, snap_ip_tcp, pad, i = 0;
576 unsigned int dbg_max_amsdu_len;
577 netdev_features_t netdev_features = NETIF_F_CSUM_MASK | NETIF_F_SG;
578 u8 *qc, tid, txf;
579
580 snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) +
581 tcp_hdrlen(skb);
582
583 qc = ieee80211_get_qos_ctl(hdr);
584 tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
585 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
586 return -EINVAL;
587
588 if (!sta->max_amsdu_len ||
589 !ieee80211_is_data_qos(hdr->frame_control) ||
590 !mvmsta->tlc_amsdu) {
591 num_subframes = 1;
592 pad = 0;
593 goto segment;
594 }
595
596 /*
597 * Do not build AMSDU for IPv6 with extension headers.
598 * ask stack to segment and checkum the generated MPDUs for us.
599 */
600 if (skb->protocol == htons(ETH_P_IPV6) &&
601 ((struct ipv6hdr *)skb_network_header(skb))->nexthdr !=
602 IPPROTO_TCP) {
603 num_subframes = 1;
604 pad = 0;
605 netdev_features &= ~NETIF_F_CSUM_MASK;
606 goto segment;
607 }
608
609 /*
610 * No need to lock amsdu_in_ampdu_allowed since it can't be modified
611 * during an BA session.
612 */
613 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
614 !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) {
615 num_subframes = 1;
616 pad = 0;
617 goto segment;
618 }
619
620 max_amsdu_len = sta->max_amsdu_len;
621 dbg_max_amsdu_len = ACCESS_ONCE(mvm->max_amsdu_len);
622
623 /* the Tx FIFO to which this A-MSDU will be routed */
624 txf = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
625
626 /*
627 * Don't send an AMSDU that will be longer than the TXF.
628 * Add a security margin of 256 for the TX command + headers.
629 * We also want to have the start of the next packet inside the
630 * fifo to be able to send bursts.
631 */
632 max_amsdu_len = min_t(unsigned int, max_amsdu_len,
633 mvm->shared_mem_cfg.txfifo_size[txf] - 256);
634
635 if (dbg_max_amsdu_len)
636 max_amsdu_len = min_t(unsigned int, max_amsdu_len,
637 dbg_max_amsdu_len);
638
639 /*
640 * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not
641 * supported. This is a spec requirement (IEEE 802.11-2015
642 * section 8.7.3 NOTE 3).
643 */
644 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
645 !sta->vht_cap.vht_supported)
646 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095);
647
648 /* Sub frame header + SNAP + IP header + TCP header + MSS */
649 subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss;
650 pad = (4 - subf_len) & 0x3;
651
652 /*
653 * If we have N subframes in the A-MSDU, then the A-MSDU's size is
654 * N * subf_len + (N - 1) * pad.
655 */
656 num_subframes = (max_amsdu_len + pad) / (subf_len + pad);
657 if (num_subframes > 1)
658 *qc |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
659
660 tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
661 tcp_hdrlen(skb) + skb->data_len;
662
663 /*
664 * Make sure we have enough TBs for the A-MSDU:
665 * 2 for each subframe
666 * 1 more for each fragment
667 * 1 more for the potential data in the header
668 */
669 num_subframes =
670 min_t(unsigned int, num_subframes,
671 (mvm->trans->max_skb_frags - 1 -
672 skb_shinfo(skb)->nr_frags) / 2);
673
674 /* This skb fits in one single A-MSDU */
675 if (num_subframes * mss >= tcp_payload_len) {
676 /*
677 * Compute the length of all the data added for the A-MSDU.
678 * This will be used to compute the length to write in the TX
679 * command. We have: SNAP + IP + TCP for n -1 subframes and
680 * ETH header for n subframes. Note that the original skb
681 * already had one set of SNAP / IP / TCP headers.
682 */
683 num_subframes = DIV_ROUND_UP(tcp_payload_len, mss);
684 info = IEEE80211_SKB_CB(skb);
685 amsdu_add = num_subframes * sizeof(struct ethhdr) +
686 (num_subframes - 1) * (snap_ip_tcp + pad);
687 /* This holds the amsdu headers length */
688 info->driver_data[0] = (void *)(uintptr_t)amsdu_add;
689
690 __skb_queue_tail(mpdus_skb, skb);
691 return 0;
692 }
693
694 /*
695 * Trick the segmentation function to make it
696 * create SKBs that can fit into one A-MSDU.
697 */
698 segment:
699 skb_shinfo(skb)->gso_size = num_subframes * mss;
700 memcpy(cb, skb->cb, sizeof(cb));
701
702 next = skb_gso_segment(skb, netdev_features);
703 skb_shinfo(skb)->gso_size = mss;
704 if (WARN_ON_ONCE(IS_ERR(next)))
705 return -EINVAL;
706 else if (next)
707 consume_skb(skb);
708
709 while (next) {
710 tmp = next;
711 next = tmp->next;
712
713 memcpy(tmp->cb, cb, sizeof(tmp->cb));
714 /*
715 * Compute the length of all the data added for the A-MSDU.
716 * This will be used to compute the length to write in the TX
717 * command. We have: SNAP + IP + TCP for n -1 subframes and
718 * ETH header for n subframes.
719 */
720 tcp_payload_len = skb_tail_pointer(tmp) -
721 skb_transport_header(tmp) -
722 tcp_hdrlen(tmp) + tmp->data_len;
723
724 if (ipv4)
725 ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes);
726
727 if (tcp_payload_len > mss) {
728 num_subframes = DIV_ROUND_UP(tcp_payload_len, mss);
729 info = IEEE80211_SKB_CB(tmp);
730 amsdu_add = num_subframes * sizeof(struct ethhdr) +
731 (num_subframes - 1) * (snap_ip_tcp + pad);
732 info->driver_data[0] = (void *)(uintptr_t)amsdu_add;
733 skb_shinfo(tmp)->gso_size = mss;
734 } else {
735 qc = ieee80211_get_qos_ctl((void *)tmp->data);
736
737 if (ipv4)
738 ip_send_check(ip_hdr(tmp));
739 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
740 skb_shinfo(tmp)->gso_size = 0;
741 }
742
743 tmp->prev = NULL;
744 tmp->next = NULL;
745
746 __skb_queue_tail(mpdus_skb, tmp);
747 i++;
748 }
749
750 return 0;
751 }
752 #else /* CONFIG_INET */
753 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
754 struct ieee80211_sta *sta,
755 struct sk_buff_head *mpdus_skb)
756 {
757 /* Impossible to get TSO with CONFIG_INET */
758 WARN_ON(1);
759
760 return -1;
761 }
762 #endif
763
764 static void iwl_mvm_tx_add_stream(struct iwl_mvm *mvm,
765 struct iwl_mvm_sta *mvm_sta, u8 tid,
766 struct sk_buff *skb)
767 {
768 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
769 u8 mac_queue = info->hw_queue;
770 struct sk_buff_head *deferred_tx_frames;
771
772 lockdep_assert_held(&mvm_sta->lock);
773
774 mvm_sta->deferred_traffic_tid_map |= BIT(tid);
775 set_bit(mvm_sta->sta_id, mvm->sta_deferred_frames);
776
777 deferred_tx_frames = &mvm_sta->tid_data[tid].deferred_tx_frames;
778
779 skb_queue_tail(deferred_tx_frames, skb);
780
781 /*
782 * The first deferred frame should've stopped the MAC queues, so we
783 * should never get a second deferred frame for the RA/TID.
784 */
785 if (!WARN(skb_queue_len(deferred_tx_frames) != 1,
786 "RATID %d/%d has %d deferred frames\n", mvm_sta->sta_id, tid,
787 skb_queue_len(deferred_tx_frames))) {
788 iwl_mvm_stop_mac_queues(mvm, BIT(mac_queue));
789 schedule_work(&mvm->add_stream_wk);
790 }
791 }
792
793 /*
794 * Sets the fields in the Tx cmd that are crypto related
795 */
796 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb,
797 struct ieee80211_sta *sta)
798 {
799 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
800 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
801 struct iwl_mvm_sta *mvmsta;
802 struct iwl_device_cmd *dev_cmd;
803 struct iwl_tx_cmd *tx_cmd;
804 __le16 fc;
805 u16 seq_number = 0;
806 u8 tid = IWL_MAX_TID_COUNT;
807 u8 txq_id = info->hw_queue;
808 bool is_ampdu = false;
809 int hdrlen;
810
811 mvmsta = iwl_mvm_sta_from_mac80211(sta);
812 fc = hdr->frame_control;
813 hdrlen = ieee80211_hdrlen(fc);
814
815 if (WARN_ON_ONCE(!mvmsta))
816 return -1;
817
818 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
819 return -1;
820
821 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, hdrlen, sta, mvmsta->sta_id);
822 if (!dev_cmd)
823 goto drop;
824
825 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
826 /* From now on, we cannot access info->control */
827
828 /*
829 * we handle that entirely ourselves -- for uAPSD the firmware
830 * will always send a notification, and for PS-Poll responses
831 * we'll notify mac80211 when getting frame status
832 */
833 info->flags &= ~IEEE80211_TX_STATUS_EOSP;
834
835 spin_lock(&mvmsta->lock);
836
837 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
838 u8 *qc = NULL;
839 qc = ieee80211_get_qos_ctl(hdr);
840 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
841 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
842 goto drop_unlock_sta;
843
844 seq_number = mvmsta->tid_data[tid].seq_number;
845 seq_number &= IEEE80211_SCTL_SEQ;
846 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
847 hdr->seq_ctrl |= cpu_to_le16(seq_number);
848 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU;
849 } else if (iwl_mvm_is_dqa_supported(mvm) &&
850 (ieee80211_is_qos_nullfunc(fc) ||
851 ieee80211_is_nullfunc(fc))) {
852 /*
853 * nullfunc frames should go to the MGMT queue regardless of QOS
854 */
855 tid = IWL_MAX_TID_COUNT;
856 txq_id = mvmsta->tid_data[tid].txq_id;
857 }
858
859 /* Copy MAC header from skb into command buffer */
860 memcpy(tx_cmd->hdr, hdr, hdrlen);
861
862 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
863
864 if (sta->tdls) {
865 /* default to TID 0 for non-QoS packets */
866 u8 tdls_tid = tid == IWL_MAX_TID_COUNT ? 0 : tid;
867
868 txq_id = mvmsta->hw_queue[tid_to_mac80211_ac[tdls_tid]];
869 }
870
871 if (is_ampdu) {
872 if (WARN_ON_ONCE(mvmsta->tid_data[tid].state != IWL_AGG_ON))
873 goto drop_unlock_sta;
874 txq_id = mvmsta->tid_data[tid].txq_id;
875 }
876
877 if (iwl_mvm_is_dqa_supported(mvm)) {
878 if (unlikely(mvmsta->tid_data[tid].txq_id ==
879 IEEE80211_INVAL_HW_QUEUE)) {
880 iwl_mvm_tx_add_stream(mvm, mvmsta, tid, skb);
881
882 /*
883 * The frame is now deferred, and the worker scheduled
884 * will re-allocate it, so we can free it for now.
885 */
886 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
887 spin_unlock(&mvmsta->lock);
888 return 0;
889 }
890
891 txq_id = mvmsta->tid_data[tid].txq_id;
892 }
893
894 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id,
895 tid, txq_id, IEEE80211_SEQ_TO_SN(seq_number));
896
897 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id))
898 goto drop_unlock_sta;
899
900 if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc))
901 mvmsta->tid_data[tid].seq_number = seq_number + 0x10;
902
903 spin_unlock(&mvmsta->lock);
904
905 if (txq_id < mvm->first_agg_queue)
906 atomic_inc(&mvm->pending_frames[mvmsta->sta_id]);
907
908 return 0;
909
910 drop_unlock_sta:
911 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
912 spin_unlock(&mvmsta->lock);
913 drop:
914 return -1;
915 }
916
917 int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb,
918 struct ieee80211_sta *sta)
919 {
920 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
921 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
922 struct sk_buff_head mpdus_skbs;
923 unsigned int payload_len;
924 int ret;
925
926 if (WARN_ON_ONCE(!mvmsta))
927 return -1;
928
929 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
930 return -1;
931
932 /* This holds the amsdu headers length */
933 info->driver_data[0] = (void *)(uintptr_t)0;
934
935 if (!skb_is_gso(skb))
936 return iwl_mvm_tx_mpdu(mvm, skb, sta);
937
938 payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
939 tcp_hdrlen(skb) + skb->data_len;
940
941 if (payload_len <= skb_shinfo(skb)->gso_size)
942 return iwl_mvm_tx_mpdu(mvm, skb, sta);
943
944 __skb_queue_head_init(&mpdus_skbs);
945
946 ret = iwl_mvm_tx_tso(mvm, skb, sta, &mpdus_skbs);
947 if (ret)
948 return ret;
949
950 if (WARN_ON(skb_queue_empty(&mpdus_skbs)))
951 return ret;
952
953 while (!skb_queue_empty(&mpdus_skbs)) {
954 skb = __skb_dequeue(&mpdus_skbs);
955
956 ret = iwl_mvm_tx_mpdu(mvm, skb, sta);
957 if (ret) {
958 __skb_queue_purge(&mpdus_skbs);
959 return ret;
960 }
961 }
962
963 return 0;
964 }
965
966 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm,
967 struct ieee80211_sta *sta, u8 tid)
968 {
969 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
970 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
971 struct ieee80211_vif *vif = mvmsta->vif;
972
973 lockdep_assert_held(&mvmsta->lock);
974
975 if ((tid_data->state == IWL_AGG_ON ||
976 tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) &&
977 iwl_mvm_tid_queued(tid_data) == 0) {
978 /*
979 * Now that this aggregation queue is empty tell mac80211 so it
980 * knows we no longer have frames buffered for the station on
981 * this TID (for the TIM bitmap calculation.)
982 */
983 ieee80211_sta_set_buffered(sta, tid, false);
984 }
985
986 if (tid_data->ssn != tid_data->next_reclaimed)
987 return;
988
989 switch (tid_data->state) {
990 case IWL_EMPTYING_HW_QUEUE_ADDBA:
991 IWL_DEBUG_TX_QUEUES(mvm,
992 "Can continue addBA flow ssn = next_recl = %d\n",
993 tid_data->next_reclaimed);
994 tid_data->state = IWL_AGG_STARTING;
995 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
996 break;
997
998 case IWL_EMPTYING_HW_QUEUE_DELBA:
999 IWL_DEBUG_TX_QUEUES(mvm,
1000 "Can continue DELBA flow ssn = next_recl = %d\n",
1001 tid_data->next_reclaimed);
1002 iwl_mvm_disable_txq(mvm, tid_data->txq_id,
1003 vif->hw_queue[tid_to_mac80211_ac[tid]], tid,
1004 CMD_ASYNC);
1005 tid_data->state = IWL_AGG_OFF;
1006 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1007 break;
1008
1009 default:
1010 break;
1011 }
1012 }
1013
1014 #ifdef CONFIG_IWLWIFI_DEBUG
1015 const char *iwl_mvm_get_tx_fail_reason(u32 status)
1016 {
1017 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
1018 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
1019
1020 switch (status & TX_STATUS_MSK) {
1021 case TX_STATUS_SUCCESS:
1022 return "SUCCESS";
1023 TX_STATUS_POSTPONE(DELAY);
1024 TX_STATUS_POSTPONE(FEW_BYTES);
1025 TX_STATUS_POSTPONE(BT_PRIO);
1026 TX_STATUS_POSTPONE(QUIET_PERIOD);
1027 TX_STATUS_POSTPONE(CALC_TTAK);
1028 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
1029 TX_STATUS_FAIL(SHORT_LIMIT);
1030 TX_STATUS_FAIL(LONG_LIMIT);
1031 TX_STATUS_FAIL(UNDERRUN);
1032 TX_STATUS_FAIL(DRAIN_FLOW);
1033 TX_STATUS_FAIL(RFKILL_FLUSH);
1034 TX_STATUS_FAIL(LIFE_EXPIRE);
1035 TX_STATUS_FAIL(DEST_PS);
1036 TX_STATUS_FAIL(HOST_ABORTED);
1037 TX_STATUS_FAIL(BT_RETRY);
1038 TX_STATUS_FAIL(STA_INVALID);
1039 TX_STATUS_FAIL(FRAG_DROPPED);
1040 TX_STATUS_FAIL(TID_DISABLE);
1041 TX_STATUS_FAIL(FIFO_FLUSHED);
1042 TX_STATUS_FAIL(SMALL_CF_POLL);
1043 TX_STATUS_FAIL(FW_DROP);
1044 TX_STATUS_FAIL(STA_COLOR_MISMATCH);
1045 }
1046
1047 return "UNKNOWN";
1048
1049 #undef TX_STATUS_FAIL
1050 #undef TX_STATUS_POSTPONE
1051 }
1052 #endif /* CONFIG_IWLWIFI_DEBUG */
1053
1054 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags,
1055 enum nl80211_band band,
1056 struct ieee80211_tx_rate *r)
1057 {
1058 if (rate_n_flags & RATE_HT_MCS_GF_MSK)
1059 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
1060 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
1061 case RATE_MCS_CHAN_WIDTH_20:
1062 break;
1063 case RATE_MCS_CHAN_WIDTH_40:
1064 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
1065 break;
1066 case RATE_MCS_CHAN_WIDTH_80:
1067 r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH;
1068 break;
1069 case RATE_MCS_CHAN_WIDTH_160:
1070 r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH;
1071 break;
1072 }
1073 if (rate_n_flags & RATE_MCS_SGI_MSK)
1074 r->flags |= IEEE80211_TX_RC_SHORT_GI;
1075 if (rate_n_flags & RATE_MCS_HT_MSK) {
1076 r->flags |= IEEE80211_TX_RC_MCS;
1077 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
1078 } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
1079 ieee80211_rate_set_vht(
1080 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK,
1081 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
1082 RATE_VHT_MCS_NSS_POS) + 1);
1083 r->flags |= IEEE80211_TX_RC_VHT_MCS;
1084 } else {
1085 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
1086 band);
1087 }
1088 }
1089
1090 /**
1091 * translate ucode response to mac80211 tx status control values
1092 */
1093 static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags,
1094 struct ieee80211_tx_info *info)
1095 {
1096 struct ieee80211_tx_rate *r = &info->status.rates[0];
1097
1098 info->status.antenna =
1099 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
1100 iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r);
1101 }
1102
1103 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm,
1104 u32 status)
1105 {
1106 struct iwl_fw_dbg_trigger_tlv *trig;
1107 struct iwl_fw_dbg_trigger_tx_status *status_trig;
1108 int i;
1109
1110 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TX_STATUS))
1111 return;
1112
1113 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TX_STATUS);
1114 status_trig = (void *)trig->data;
1115
1116 if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig))
1117 return;
1118
1119 for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) {
1120 /* don't collect on status 0 */
1121 if (!status_trig->statuses[i].status)
1122 break;
1123
1124 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK))
1125 continue;
1126
1127 iwl_mvm_fw_dbg_collect_trig(mvm, trig,
1128 "Tx status %d was received",
1129 status & TX_STATUS_MSK);
1130 break;
1131 }
1132 }
1133
1134 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm,
1135 struct iwl_rx_packet *pkt)
1136 {
1137 struct ieee80211_sta *sta;
1138 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1139 int txq_id = SEQ_TO_QUEUE(sequence);
1140 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1141 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1142 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1143 u32 status = le16_to_cpu(tx_resp->status.status);
1144 u16 ssn = iwl_mvm_get_scd_ssn(tx_resp);
1145 struct iwl_mvm_sta *mvmsta;
1146 struct sk_buff_head skbs;
1147 u8 skb_freed = 0;
1148 u16 next_reclaimed, seq_ctl;
1149 bool is_ndp = false;
1150
1151 __skb_queue_head_init(&skbs);
1152
1153 seq_ctl = le16_to_cpu(tx_resp->seq_ctl);
1154
1155 /* we can free until ssn % q.n_bd not inclusive */
1156 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs);
1157
1158 while (!skb_queue_empty(&skbs)) {
1159 struct sk_buff *skb = __skb_dequeue(&skbs);
1160 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1161
1162 skb_freed++;
1163
1164 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1165
1166 memset(&info->status, 0, sizeof(info->status));
1167
1168 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1169
1170 /* inform mac80211 about what happened with the frame */
1171 switch (status & TX_STATUS_MSK) {
1172 case TX_STATUS_SUCCESS:
1173 case TX_STATUS_DIRECT_DONE:
1174 info->flags |= IEEE80211_TX_STAT_ACK;
1175 break;
1176 case TX_STATUS_FAIL_DEST_PS:
1177 info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
1178 break;
1179 default:
1180 break;
1181 }
1182
1183 iwl_mvm_tx_status_check_trigger(mvm, status);
1184
1185 info->status.rates[0].count = tx_resp->failure_frame + 1;
1186 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate),
1187 info);
1188 info->status.status_driver_data[1] =
1189 (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate);
1190
1191 /* Single frame failure in an AMPDU queue => send BAR */
1192 if (txq_id >= mvm->first_agg_queue &&
1193 !(info->flags & IEEE80211_TX_STAT_ACK) &&
1194 !(info->flags & IEEE80211_TX_STAT_TX_FILTERED))
1195 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1196
1197 /* W/A FW bug: seq_ctl is wrong when the status isn't success */
1198 if (status != TX_STATUS_SUCCESS) {
1199 struct ieee80211_hdr *hdr = (void *)skb->data;
1200 seq_ctl = le16_to_cpu(hdr->seq_ctrl);
1201 }
1202
1203 if (unlikely(!seq_ctl)) {
1204 struct ieee80211_hdr *hdr = (void *)skb->data;
1205
1206 /*
1207 * If it is an NDP, we can't update next_reclaim since
1208 * its sequence control is 0. Note that for that same
1209 * reason, NDPs are never sent to A-MPDU'able queues
1210 * so that we can never have more than one freed frame
1211 * for a single Tx resonse (see WARN_ON below).
1212 */
1213 if (ieee80211_is_qos_nullfunc(hdr->frame_control))
1214 is_ndp = true;
1215 }
1216
1217 /*
1218 * TODO: this is not accurate if we are freeing more than one
1219 * packet.
1220 */
1221 info->status.tx_time =
1222 le16_to_cpu(tx_resp->wireless_media_time);
1223 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1);
1224 info->status.status_driver_data[0] =
1225 (void *)(uintptr_t)tx_resp->reduced_tpc;
1226
1227 ieee80211_tx_status(mvm->hw, skb);
1228 }
1229
1230 if (txq_id >= mvm->first_agg_queue) {
1231 /* If this is an aggregation queue, we use the ssn since:
1232 * ssn = wifi seq_num % 256.
1233 * The seq_ctl is the sequence control of the packet to which
1234 * this Tx response relates. But if there is a hole in the
1235 * bitmap of the BA we received, this Tx response may allow to
1236 * reclaim the hole and all the subsequent packets that were
1237 * already acked. In that case, seq_ctl != ssn, and the next
1238 * packet to be reclaimed will be ssn and not seq_ctl. In that
1239 * case, several packets will be reclaimed even if
1240 * frame_count = 1.
1241 *
1242 * The ssn is the index (% 256) of the latest packet that has
1243 * treated (acked / dropped) + 1.
1244 */
1245 next_reclaimed = ssn;
1246 } else {
1247 /* The next packet to be reclaimed is the one after this one */
1248 next_reclaimed = IEEE80211_SEQ_TO_SN(seq_ctl + 0x10);
1249 }
1250
1251 IWL_DEBUG_TX_REPLY(mvm,
1252 "TXQ %d status %s (0x%08x)\n",
1253 txq_id, iwl_mvm_get_tx_fail_reason(status), status);
1254
1255 IWL_DEBUG_TX_REPLY(mvm,
1256 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
1257 le32_to_cpu(tx_resp->initial_rate),
1258 tx_resp->failure_frame, SEQ_TO_INDEX(sequence),
1259 ssn, next_reclaimed, seq_ctl);
1260
1261 rcu_read_lock();
1262
1263 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1264 /*
1265 * sta can't be NULL otherwise it'd mean that the sta has been freed in
1266 * the firmware while we still have packets for it in the Tx queues.
1267 */
1268 if (WARN_ON_ONCE(!sta))
1269 goto out;
1270
1271 if (!IS_ERR(sta)) {
1272 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1273
1274 if (tid != IWL_TID_NON_QOS) {
1275 struct iwl_mvm_tid_data *tid_data =
1276 &mvmsta->tid_data[tid];
1277 bool send_eosp_ndp = false;
1278
1279 spin_lock_bh(&mvmsta->lock);
1280 if (!is_ndp) {
1281 tid_data->next_reclaimed = next_reclaimed;
1282 IWL_DEBUG_TX_REPLY(mvm,
1283 "Next reclaimed packet:%d\n",
1284 next_reclaimed);
1285 } else {
1286 IWL_DEBUG_TX_REPLY(mvm,
1287 "NDP - don't update next_reclaimed\n");
1288 }
1289
1290 iwl_mvm_check_ratid_empty(mvm, sta, tid);
1291
1292 if (mvmsta->sleep_tx_count) {
1293 mvmsta->sleep_tx_count--;
1294 if (mvmsta->sleep_tx_count &&
1295 !iwl_mvm_tid_queued(tid_data)) {
1296 /*
1297 * The number of frames in the queue
1298 * dropped to 0 even if we sent less
1299 * frames than we thought we had on the
1300 * Tx queue.
1301 * This means we had holes in the BA
1302 * window that we just filled, ask
1303 * mac80211 to send EOSP since the
1304 * firmware won't know how to do that.
1305 * Send NDP and the firmware will send
1306 * EOSP notification that will trigger
1307 * a call to ieee80211_sta_eosp().
1308 */
1309 send_eosp_ndp = true;
1310 }
1311 }
1312
1313 spin_unlock_bh(&mvmsta->lock);
1314 if (send_eosp_ndp) {
1315 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta,
1316 IEEE80211_FRAME_RELEASE_UAPSD,
1317 1, tid, false, false);
1318 mvmsta->sleep_tx_count = 0;
1319 ieee80211_send_eosp_nullfunc(sta, tid);
1320 }
1321 }
1322
1323 if (mvmsta->next_status_eosp) {
1324 mvmsta->next_status_eosp = false;
1325 ieee80211_sta_eosp(sta);
1326 }
1327 } else {
1328 mvmsta = NULL;
1329 }
1330
1331 /*
1332 * If the txq is not an AMPDU queue, there is no chance we freed
1333 * several skbs. Check that out...
1334 */
1335 if (txq_id >= mvm->first_agg_queue)
1336 goto out;
1337
1338 /* We can't free more than one frame at once on a shared queue */
1339 WARN_ON(skb_freed > 1);
1340
1341 /* If we have still frames for this STA nothing to do here */
1342 if (!atomic_sub_and_test(skb_freed, &mvm->pending_frames[sta_id]))
1343 goto out;
1344
1345 if (mvmsta && mvmsta->vif->type == NL80211_IFTYPE_AP) {
1346
1347 /*
1348 * If there are no pending frames for this STA and
1349 * the tx to this station is not disabled, notify
1350 * mac80211 that this station can now wake up in its
1351 * STA table.
1352 * If mvmsta is not NULL, sta is valid.
1353 */
1354
1355 spin_lock_bh(&mvmsta->lock);
1356
1357 if (!mvmsta->disable_tx)
1358 ieee80211_sta_block_awake(mvm->hw, sta, false);
1359
1360 spin_unlock_bh(&mvmsta->lock);
1361 }
1362
1363 if (PTR_ERR(sta) == -EBUSY || PTR_ERR(sta) == -ENOENT) {
1364 /*
1365 * We are draining and this was the last packet - pre_rcu_remove
1366 * has been called already. We might be after the
1367 * synchronize_net already.
1368 * Don't rely on iwl_mvm_rm_sta to see the empty Tx queues.
1369 */
1370 set_bit(sta_id, mvm->sta_drained);
1371 schedule_work(&mvm->sta_drained_wk);
1372 }
1373
1374 out:
1375 rcu_read_unlock();
1376 }
1377
1378 #ifdef CONFIG_IWLWIFI_DEBUG
1379 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
1380 static const char *iwl_get_agg_tx_status(u16 status)
1381 {
1382 switch (status & AGG_TX_STATE_STATUS_MSK) {
1383 AGG_TX_STATE_(TRANSMITTED);
1384 AGG_TX_STATE_(UNDERRUN);
1385 AGG_TX_STATE_(BT_PRIO);
1386 AGG_TX_STATE_(FEW_BYTES);
1387 AGG_TX_STATE_(ABORT);
1388 AGG_TX_STATE_(LAST_SENT_TTL);
1389 AGG_TX_STATE_(LAST_SENT_TRY_CNT);
1390 AGG_TX_STATE_(LAST_SENT_BT_KILL);
1391 AGG_TX_STATE_(SCD_QUERY);
1392 AGG_TX_STATE_(TEST_BAD_CRC32);
1393 AGG_TX_STATE_(RESPONSE);
1394 AGG_TX_STATE_(DUMP_TX);
1395 AGG_TX_STATE_(DELAY_TX);
1396 }
1397
1398 return "UNKNOWN";
1399 }
1400
1401 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1402 struct iwl_rx_packet *pkt)
1403 {
1404 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1405 struct agg_tx_status *frame_status = &tx_resp->status;
1406 int i;
1407
1408 for (i = 0; i < tx_resp->frame_count; i++) {
1409 u16 fstatus = le16_to_cpu(frame_status[i].status);
1410
1411 IWL_DEBUG_TX_REPLY(mvm,
1412 "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
1413 iwl_get_agg_tx_status(fstatus),
1414 fstatus & AGG_TX_STATE_STATUS_MSK,
1415 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >>
1416 AGG_TX_STATE_TRY_CNT_POS,
1417 le16_to_cpu(frame_status[i].sequence));
1418 }
1419 }
1420 #else
1421 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1422 struct iwl_rx_packet *pkt)
1423 {}
1424 #endif /* CONFIG_IWLWIFI_DEBUG */
1425
1426 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm,
1427 struct iwl_rx_packet *pkt)
1428 {
1429 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1430 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1431 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1432 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1433 struct ieee80211_sta *sta;
1434
1435 if (WARN_ON_ONCE(SEQ_TO_QUEUE(sequence) < mvm->first_agg_queue))
1436 return;
1437
1438 if (WARN_ON_ONCE(tid == IWL_TID_NON_QOS))
1439 return;
1440
1441 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt);
1442
1443 rcu_read_lock();
1444
1445 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1446
1447 if (!WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
1448 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1449 mvmsta->tid_data[tid].rate_n_flags =
1450 le32_to_cpu(tx_resp->initial_rate);
1451 mvmsta->tid_data[tid].tx_time =
1452 le16_to_cpu(tx_resp->wireless_media_time);
1453 }
1454
1455 rcu_read_unlock();
1456 }
1457
1458 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1459 {
1460 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1461 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1462
1463 if (tx_resp->frame_count == 1)
1464 iwl_mvm_rx_tx_cmd_single(mvm, pkt);
1465 else
1466 iwl_mvm_rx_tx_cmd_agg(mvm, pkt);
1467 }
1468
1469 static void iwl_mvm_tx_info_from_ba_notif(struct ieee80211_tx_info *info,
1470 struct iwl_mvm_ba_notif *ba_notif,
1471 struct iwl_mvm_tid_data *tid_data)
1472 {
1473 info->flags |= IEEE80211_TX_STAT_AMPDU;
1474 info->status.ampdu_ack_len = ba_notif->txed_2_done;
1475 info->status.ampdu_len = ba_notif->txed;
1476 iwl_mvm_hwrate_to_tx_status(tid_data->rate_n_flags,
1477 info);
1478 /* TODO: not accounted if the whole A-MPDU failed */
1479 info->status.tx_time = tid_data->tx_time;
1480 info->status.status_driver_data[0] =
1481 (void *)(uintptr_t)ba_notif->reduced_txp;
1482 info->status.status_driver_data[1] =
1483 (void *)(uintptr_t)tid_data->rate_n_flags;
1484 }
1485
1486 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1487 {
1488 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1489 struct iwl_mvm_ba_notif *ba_notif = (void *)pkt->data;
1490 struct sk_buff_head reclaimed_skbs;
1491 struct iwl_mvm_tid_data *tid_data;
1492 struct ieee80211_sta *sta;
1493 struct iwl_mvm_sta *mvmsta;
1494 struct sk_buff *skb;
1495 int sta_id, tid, freed;
1496 /* "flow" corresponds to Tx queue */
1497 u16 scd_flow = le16_to_cpu(ba_notif->scd_flow);
1498 /* "ssn" is start of block-ack Tx window, corresponds to index
1499 * (in Tx queue's circular buffer) of first TFD/frame in window */
1500 u16 ba_resp_scd_ssn = le16_to_cpu(ba_notif->scd_ssn);
1501
1502 sta_id = ba_notif->sta_id;
1503 tid = ba_notif->tid;
1504
1505 if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT ||
1506 tid >= IWL_MAX_TID_COUNT,
1507 "sta_id %d tid %d", sta_id, tid))
1508 return;
1509
1510 rcu_read_lock();
1511
1512 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1513
1514 /* Reclaiming frames for a station that has been deleted ? */
1515 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
1516 rcu_read_unlock();
1517 return;
1518 }
1519
1520 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1521 tid_data = &mvmsta->tid_data[tid];
1522
1523 if (tid_data->txq_id != scd_flow) {
1524 IWL_ERR(mvm,
1525 "invalid BA notification: Q %d, tid %d, flow %d\n",
1526 tid_data->txq_id, tid, scd_flow);
1527 rcu_read_unlock();
1528 return;
1529 }
1530
1531 spin_lock_bh(&mvmsta->lock);
1532
1533 __skb_queue_head_init(&reclaimed_skbs);
1534
1535 /*
1536 * Release all TFDs before the SSN, i.e. all TFDs in front of
1537 * block-ack window (we assume that they've been successfully
1538 * transmitted ... if not, it's too late anyway).
1539 */
1540 iwl_trans_reclaim(mvm->trans, scd_flow, ba_resp_scd_ssn,
1541 &reclaimed_skbs);
1542
1543 IWL_DEBUG_TX_REPLY(mvm,
1544 "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
1545 (u8 *)&ba_notif->sta_addr_lo32,
1546 ba_notif->sta_id);
1547 IWL_DEBUG_TX_REPLY(mvm,
1548 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
1549 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl),
1550 (unsigned long long)le64_to_cpu(ba_notif->bitmap),
1551 scd_flow, ba_resp_scd_ssn, ba_notif->txed,
1552 ba_notif->txed_2_done);
1553
1554 IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n",
1555 ba_notif->reduced_txp);
1556 tid_data->next_reclaimed = ba_resp_scd_ssn;
1557
1558 iwl_mvm_check_ratid_empty(mvm, sta, tid);
1559
1560 freed = 0;
1561
1562 skb_queue_walk(&reclaimed_skbs, skb) {
1563 struct ieee80211_hdr *hdr = (void *)skb->data;
1564 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1565
1566 if (ieee80211_is_data_qos(hdr->frame_control))
1567 freed++;
1568 else
1569 WARN_ON_ONCE(1);
1570
1571 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1572
1573 memset(&info->status, 0, sizeof(info->status));
1574 /* Packet was transmitted successfully, failures come as single
1575 * frames because before failing a frame the firmware transmits
1576 * it without aggregation at least once.
1577 */
1578 info->flags |= IEEE80211_TX_STAT_ACK;
1579
1580 /* this is the first skb we deliver in this batch */
1581 /* put the rate scaling data there */
1582 if (freed == 1)
1583 iwl_mvm_tx_info_from_ba_notif(info, ba_notif, tid_data);
1584 }
1585
1586 spin_unlock_bh(&mvmsta->lock);
1587
1588 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is
1589 * possible (i.e. first MPDU in the aggregation wasn't acked)
1590 * Still it's important to update RS about sent vs. acked.
1591 */
1592 if (skb_queue_empty(&reclaimed_skbs)) {
1593 struct ieee80211_tx_info ba_info = {};
1594 struct ieee80211_chanctx_conf *chanctx_conf = NULL;
1595
1596 if (mvmsta->vif)
1597 chanctx_conf =
1598 rcu_dereference(mvmsta->vif->chanctx_conf);
1599
1600 if (WARN_ON_ONCE(!chanctx_conf))
1601 goto out;
1602
1603 ba_info.band = chanctx_conf->def.chan->band;
1604 iwl_mvm_tx_info_from_ba_notif(&ba_info, ba_notif, tid_data);
1605
1606 IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n");
1607 iwl_mvm_rs_tx_status(mvm, sta, tid, &ba_info);
1608 }
1609
1610 out:
1611 rcu_read_unlock();
1612
1613 while (!skb_queue_empty(&reclaimed_skbs)) {
1614 skb = __skb_dequeue(&reclaimed_skbs);
1615 ieee80211_tx_status(mvm->hw, skb);
1616 }
1617 }
1618
1619 /*
1620 * Note that there are transports that buffer frames before they reach
1621 * the firmware. This means that after flush_tx_path is called, the
1622 * queue might not be empty. The race-free way to handle this is to:
1623 * 1) set the station as draining
1624 * 2) flush the Tx path
1625 * 3) wait for the transport queues to be empty
1626 */
1627 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, u32 flags)
1628 {
1629 int ret;
1630 struct iwl_tx_path_flush_cmd flush_cmd = {
1631 .queues_ctl = cpu_to_le32(tfd_msk),
1632 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH),
1633 };
1634
1635 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags,
1636 sizeof(flush_cmd), &flush_cmd);
1637 if (ret)
1638 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
1639 return ret;
1640 }
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