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[deliverable/linux.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_tx_info *skb_info = IEEE80211_SKB_CB(skb);
215 struct ieee80211_hdr *hdr = (void *)skb->data;
216 __le16 fc = hdr->frame_control;
217 u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags);
218 u32 len = skb->len + FCS_LEN;
219 u8 ac;
220
221 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
222 tx_flags |= TX_CMD_FLG_ACK;
223 else
224 tx_flags &= ~TX_CMD_FLG_ACK;
225
226 if (ieee80211_is_probe_resp(fc))
227 tx_flags |= TX_CMD_FLG_TSF;
228
229 if (ieee80211_has_morefrags(fc))
230 tx_flags |= TX_CMD_FLG_MORE_FRAG;
231
232 if (ieee80211_is_data_qos(fc)) {
233 u8 *qc = ieee80211_get_qos_ctl(hdr);
234 tx_cmd->tid_tspec = qc[0] & 0xf;
235 tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
236 if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT)
237 tx_cmd->offload_assist |=
238 cpu_to_le16(BIT(TX_CMD_OFFLD_AMSDU));
239 } else if (ieee80211_is_back_req(fc)) {
240 struct ieee80211_bar *bar = (void *)skb->data;
241 u16 control = le16_to_cpu(bar->control);
242 u16 ssn = le16_to_cpu(bar->start_seq_num);
243
244 tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR;
245 tx_cmd->tid_tspec = (control &
246 IEEE80211_BAR_CTRL_TID_INFO_MASK) >>
247 IEEE80211_BAR_CTRL_TID_INFO_SHIFT;
248 WARN_ON_ONCE(tx_cmd->tid_tspec >= IWL_MAX_TID_COUNT);
249 iwl_mvm_bar_check_trigger(mvm, bar->ra, tx_cmd->tid_tspec,
250 ssn);
251 } else {
252 tx_cmd->tid_tspec = IWL_TID_NON_QOS;
253 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
254 tx_flags |= TX_CMD_FLG_SEQ_CTL;
255 else
256 tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
257 }
258
259 /* Default to 0 (BE) when tid_spec is set to IWL_TID_NON_QOS */
260 if (tx_cmd->tid_tspec < IWL_MAX_TID_COUNT)
261 ac = tid_to_mac80211_ac[tx_cmd->tid_tspec];
262 else
263 ac = tid_to_mac80211_ac[0];
264
265 tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) <<
266 TX_CMD_FLG_BT_PRIO_POS;
267
268 if (ieee80211_is_mgmt(fc)) {
269 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
270 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_ASSOC);
271 else if (ieee80211_is_action(fc))
272 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
273 else
274 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
275
276 /* The spec allows Action frames in A-MPDU, we don't support
277 * it
278 */
279 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU);
280 } else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) {
281 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
282 } else {
283 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
284 }
285
286 if (ieee80211_is_data(fc) && len > mvm->rts_threshold &&
287 !is_multicast_ether_addr(ieee80211_get_DA(hdr)))
288 tx_flags |= TX_CMD_FLG_PROT_REQUIRE;
289
290 if (fw_has_capa(&mvm->fw->ucode_capa,
291 IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT) &&
292 ieee80211_action_contains_tpc(skb))
293 tx_flags |= TX_CMD_FLG_WRITE_TX_POWER;
294
295 tx_cmd->tx_flags = cpu_to_le32(tx_flags);
296 /* Total # bytes to be transmitted */
297 tx_cmd->len = cpu_to_le16((u16)skb->len +
298 (uintptr_t)skb_info->driver_data[0]);
299 tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
300 tx_cmd->sta_id = sta_id;
301
302 /* padding is inserted later in transport */
303 if (ieee80211_hdrlen(fc) % 4 &&
304 !(tx_cmd->offload_assist & cpu_to_le16(BIT(TX_CMD_OFFLD_AMSDU))))
305 tx_cmd->offload_assist |= cpu_to_le16(BIT(TX_CMD_OFFLD_PAD));
306
307 iwl_mvm_tx_csum(mvm, skb, hdr, info, tx_cmd);
308 }
309
310 /*
311 * Sets the fields in the Tx cmd that are rate related
312 */
313 void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd,
314 struct ieee80211_tx_info *info,
315 struct ieee80211_sta *sta, __le16 fc)
316 {
317 u32 rate_flags;
318 int rate_idx;
319 u8 rate_plcp;
320
321 /* Set retry limit on RTS packets */
322 tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT;
323
324 /* Set retry limit on DATA packets and Probe Responses*/
325 if (ieee80211_is_probe_resp(fc)) {
326 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT;
327 tx_cmd->rts_retry_limit =
328 min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit);
329 } else if (ieee80211_is_back_req(fc)) {
330 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT;
331 } else {
332 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY;
333 }
334
335 /*
336 * for data packets, rate info comes from the table inside the fw. This
337 * table is controlled by LINK_QUALITY commands
338 */
339
340 if (ieee80211_is_data(fc) && sta) {
341 tx_cmd->initial_rate_index = 0;
342 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE);
343 return;
344 } else if (ieee80211_is_back_req(fc)) {
345 tx_cmd->tx_flags |=
346 cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR);
347 }
348
349 /* HT rate doesn't make sense for a non data frame */
350 WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS,
351 "Got an HT rate (flags:0x%x/mcs:%d) for a non data frame (fc:0x%x)\n",
352 info->control.rates[0].flags,
353 info->control.rates[0].idx,
354 le16_to_cpu(fc));
355
356 rate_idx = info->control.rates[0].idx;
357 /* if the rate isn't a well known legacy rate, take the lowest one */
358 if (rate_idx < 0 || rate_idx > IWL_RATE_COUNT_LEGACY)
359 rate_idx = rate_lowest_index(
360 &mvm->nvm_data->bands[info->band], sta);
361
362 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
363 if (info->band == NL80211_BAND_5GHZ)
364 rate_idx += IWL_FIRST_OFDM_RATE;
365
366 /* For 2.4 GHZ band, check that there is no need to remap */
367 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
368
369 /* Get PLCP rate for tx_cmd->rate_n_flags */
370 rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(rate_idx);
371
372 mvm->mgmt_last_antenna_idx =
373 iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm),
374 mvm->mgmt_last_antenna_idx);
375
376 if (info->band == NL80211_BAND_2GHZ &&
377 !iwl_mvm_bt_coex_is_shared_ant_avail(mvm))
378 rate_flags = mvm->cfg->non_shared_ant << RATE_MCS_ANT_POS;
379 else
380 rate_flags =
381 BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS;
382
383 /* Set CCK flag as needed */
384 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
385 rate_flags |= RATE_MCS_CCK_MSK;
386
387 /* Set the rate in the TX cmd */
388 tx_cmd->rate_n_flags = cpu_to_le32((u32)rate_plcp | rate_flags);
389 }
390
391 /*
392 * Sets the fields in the Tx cmd that are crypto related
393 */
394 static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm,
395 struct ieee80211_tx_info *info,
396 struct iwl_tx_cmd *tx_cmd,
397 struct sk_buff *skb_frag,
398 int hdrlen)
399 {
400 struct ieee80211_key_conf *keyconf = info->control.hw_key;
401 u8 *crypto_hdr = skb_frag->data + hdrlen;
402 u64 pn;
403
404 switch (keyconf->cipher) {
405 case WLAN_CIPHER_SUITE_CCMP:
406 case WLAN_CIPHER_SUITE_CCMP_256:
407 iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd);
408 pn = atomic64_inc_return(&keyconf->tx_pn);
409 crypto_hdr[0] = pn;
410 crypto_hdr[2] = 0;
411 crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6);
412 crypto_hdr[1] = pn >> 8;
413 crypto_hdr[4] = pn >> 16;
414 crypto_hdr[5] = pn >> 24;
415 crypto_hdr[6] = pn >> 32;
416 crypto_hdr[7] = pn >> 40;
417 break;
418
419 case WLAN_CIPHER_SUITE_TKIP:
420 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
421 pn = atomic64_inc_return(&keyconf->tx_pn);
422 ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn);
423 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
424 break;
425
426 case WLAN_CIPHER_SUITE_WEP104:
427 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
428 /* fall through */
429 case WLAN_CIPHER_SUITE_WEP40:
430 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP |
431 ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) &
432 TX_CMD_SEC_WEP_KEY_IDX_MSK);
433
434 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
435 break;
436 default:
437 tx_cmd->sec_ctl |= TX_CMD_SEC_EXT;
438 }
439 }
440
441 /*
442 * Allocates and sets the Tx cmd the driver data pointers in the skb
443 */
444 static struct iwl_device_cmd *
445 iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb,
446 struct ieee80211_tx_info *info, int hdrlen,
447 struct ieee80211_sta *sta, u8 sta_id)
448 {
449 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
450 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb);
451 struct iwl_device_cmd *dev_cmd;
452 struct iwl_tx_cmd *tx_cmd;
453
454 dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans);
455
456 if (unlikely(!dev_cmd))
457 return NULL;
458
459 memset(dev_cmd, 0, sizeof(*dev_cmd));
460 dev_cmd->hdr.cmd = TX_CMD;
461 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
462
463 if (info->control.hw_key)
464 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen);
465
466 iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id);
467
468 iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control);
469
470 memset(&skb_info->status, 0, sizeof(skb_info->status));
471 memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data));
472
473 skb_info->driver_data[1] = dev_cmd;
474
475 return dev_cmd;
476 }
477
478 static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm,
479 struct ieee80211_tx_info *info, __le16 fc)
480 {
481 if (iwl_mvm_is_dqa_supported(mvm) &&
482 info->control.vif->type == NL80211_IFTYPE_AP &&
483 ieee80211_is_probe_resp(fc))
484 return IWL_MVM_DQA_AP_PROBE_RESP_QUEUE;
485
486 return info->hw_queue;
487 }
488
489 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb)
490 {
491 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
492 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb);
493 struct ieee80211_tx_info info;
494 struct iwl_device_cmd *dev_cmd;
495 struct iwl_tx_cmd *tx_cmd;
496 u8 sta_id;
497 int hdrlen = ieee80211_hdrlen(hdr->frame_control);
498 int queue;
499
500 memcpy(&info, skb->cb, sizeof(info));
501
502 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU))
503 return -1;
504
505 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM &&
506 (!info.control.vif ||
507 info.hw_queue != info.control.vif->cab_queue)))
508 return -1;
509
510 /* This holds the amsdu headers length */
511 skb_info->driver_data[0] = (void *)(uintptr_t)0;
512
513 /*
514 * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets that can be used
515 * in 2 different types of vifs, P2P & STATION. P2P uses the offchannel
516 * queue. STATION (HS2.0) uses the auxiliary context of the FW,
517 * and hence needs to be sent on the aux queue
518 */
519 if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
520 info.control.vif->type == NL80211_IFTYPE_STATION)
521 IEEE80211_SKB_CB(skb)->hw_queue = mvm->aux_queue;
522
523 queue = info.hw_queue;
524
525 /*
526 * If the interface on which the frame is sent is the P2P_DEVICE
527 * or an AP/GO interface use the broadcast station associated
528 * with it; otherwise if the interface is a managed interface
529 * use the AP station associated with it for multicast traffic
530 * (this is not possible for unicast packets as a TLDS discovery
531 * response are sent without a station entry); otherwise use the
532 * AUX station.
533 */
534 sta_id = mvm->aux_sta.sta_id;
535 if (info.control.vif) {
536 struct iwl_mvm_vif *mvmvif =
537 iwl_mvm_vif_from_mac80211(info.control.vif);
538
539 if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE ||
540 info.control.vif->type == NL80211_IFTYPE_AP) {
541 sta_id = mvmvif->bcast_sta.sta_id;
542 queue = iwl_mvm_get_ctrl_vif_queue(mvm, &info,
543 hdr->frame_control);
544 } else if (info.control.vif->type == NL80211_IFTYPE_STATION &&
545 is_multicast_ether_addr(hdr->addr1)) {
546 u8 ap_sta_id = ACCESS_ONCE(mvmvif->ap_sta_id);
547
548 if (ap_sta_id != IWL_MVM_STATION_COUNT)
549 sta_id = ap_sta_id;
550 }
551 }
552
553 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue);
554
555 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id);
556 if (!dev_cmd)
557 return -1;
558
559 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
560
561 /* Copy MAC header from skb into command buffer */
562 memcpy(tx_cmd->hdr, hdr, hdrlen);
563
564 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) {
565 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
566 return -1;
567 }
568
569 /*
570 * Increase the pending frames counter, so that later when a reply comes
571 * in and the counter is decreased - we don't start getting negative
572 * values.
573 * Note that we don't need to make sure it isn't agg'd, since we're
574 * TXing non-sta
575 */
576 atomic_inc(&mvm->pending_frames[sta_id]);
577
578 return 0;
579 }
580
581 #ifdef CONFIG_INET
582 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
583 struct ieee80211_tx_info *info,
584 struct ieee80211_sta *sta,
585 struct sk_buff_head *mpdus_skb)
586 {
587 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
588 struct ieee80211_hdr *hdr = (void *)skb->data;
589 unsigned int mss = skb_shinfo(skb)->gso_size;
590 struct sk_buff *tmp, *next;
591 char cb[sizeof(skb->cb)];
592 unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len;
593 bool ipv4 = (skb->protocol == htons(ETH_P_IP));
594 u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0;
595 u16 amsdu_add, snap_ip_tcp, pad, i = 0;
596 unsigned int dbg_max_amsdu_len;
597 netdev_features_t netdev_features = NETIF_F_CSUM_MASK | NETIF_F_SG;
598 u8 *qc, tid, txf;
599
600 snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) +
601 tcp_hdrlen(skb);
602
603 qc = ieee80211_get_qos_ctl(hdr);
604 tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
605 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
606 return -EINVAL;
607
608 if (!sta->max_amsdu_len ||
609 !ieee80211_is_data_qos(hdr->frame_control) ||
610 !mvmsta->tlc_amsdu) {
611 num_subframes = 1;
612 pad = 0;
613 goto segment;
614 }
615
616 /*
617 * Do not build AMSDU for IPv6 with extension headers.
618 * ask stack to segment and checkum the generated MPDUs for us.
619 */
620 if (skb->protocol == htons(ETH_P_IPV6) &&
621 ((struct ipv6hdr *)skb_network_header(skb))->nexthdr !=
622 IPPROTO_TCP) {
623 num_subframes = 1;
624 pad = 0;
625 netdev_features &= ~NETIF_F_CSUM_MASK;
626 goto segment;
627 }
628
629 /*
630 * No need to lock amsdu_in_ampdu_allowed since it can't be modified
631 * during an BA session.
632 */
633 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
634 !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) {
635 num_subframes = 1;
636 pad = 0;
637 goto segment;
638 }
639
640 max_amsdu_len = sta->max_amsdu_len;
641 dbg_max_amsdu_len = ACCESS_ONCE(mvm->max_amsdu_len);
642
643 /* the Tx FIFO to which this A-MSDU will be routed */
644 txf = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
645
646 /*
647 * Don't send an AMSDU that will be longer than the TXF.
648 * Add a security margin of 256 for the TX command + headers.
649 * We also want to have the start of the next packet inside the
650 * fifo to be able to send bursts.
651 */
652 max_amsdu_len = min_t(unsigned int, max_amsdu_len,
653 mvm->shared_mem_cfg.txfifo_size[txf] - 256);
654
655 if (dbg_max_amsdu_len)
656 max_amsdu_len = min_t(unsigned int, max_amsdu_len,
657 dbg_max_amsdu_len);
658
659 /*
660 * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not
661 * supported. This is a spec requirement (IEEE 802.11-2015
662 * section 8.7.3 NOTE 3).
663 */
664 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
665 !sta->vht_cap.vht_supported)
666 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095);
667
668 /* Sub frame header + SNAP + IP header + TCP header + MSS */
669 subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss;
670 pad = (4 - subf_len) & 0x3;
671
672 /*
673 * If we have N subframes in the A-MSDU, then the A-MSDU's size is
674 * N * subf_len + (N - 1) * pad.
675 */
676 num_subframes = (max_amsdu_len + pad) / (subf_len + pad);
677 if (num_subframes > 1)
678 *qc |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
679
680 tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
681 tcp_hdrlen(skb) + skb->data_len;
682
683 /*
684 * Make sure we have enough TBs for the A-MSDU:
685 * 2 for each subframe
686 * 1 more for each fragment
687 * 1 more for the potential data in the header
688 */
689 num_subframes =
690 min_t(unsigned int, num_subframes,
691 (mvm->trans->max_skb_frags - 1 -
692 skb_shinfo(skb)->nr_frags) / 2);
693
694 /* This skb fits in one single A-MSDU */
695 if (num_subframes * mss >= tcp_payload_len) {
696 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb);
697
698 /*
699 * Compute the length of all the data added for the A-MSDU.
700 * This will be used to compute the length to write in the TX
701 * command. We have: SNAP + IP + TCP for n -1 subframes and
702 * ETH header for n subframes. Note that the original skb
703 * already had one set of SNAP / IP / TCP headers.
704 */
705 num_subframes = DIV_ROUND_UP(tcp_payload_len, mss);
706 amsdu_add = num_subframes * sizeof(struct ethhdr) +
707 (num_subframes - 1) * (snap_ip_tcp + pad);
708 /* This holds the amsdu headers length */
709 skb_info->driver_data[0] = (void *)(uintptr_t)amsdu_add;
710
711 __skb_queue_tail(mpdus_skb, skb);
712 return 0;
713 }
714
715 /*
716 * Trick the segmentation function to make it
717 * create SKBs that can fit into one A-MSDU.
718 */
719 segment:
720 skb_shinfo(skb)->gso_size = num_subframes * mss;
721 memcpy(cb, skb->cb, sizeof(cb));
722
723 next = skb_gso_segment(skb, netdev_features);
724 skb_shinfo(skb)->gso_size = mss;
725 if (WARN_ON_ONCE(IS_ERR(next)))
726 return -EINVAL;
727 else if (next)
728 consume_skb(skb);
729
730 while (next) {
731 tmp = next;
732 next = tmp->next;
733
734 memcpy(tmp->cb, cb, sizeof(tmp->cb));
735 /*
736 * Compute the length of all the data added for the A-MSDU.
737 * This will be used to compute the length to write in the TX
738 * command. We have: SNAP + IP + TCP for n -1 subframes and
739 * ETH header for n subframes.
740 */
741 tcp_payload_len = skb_tail_pointer(tmp) -
742 skb_transport_header(tmp) -
743 tcp_hdrlen(tmp) + tmp->data_len;
744
745 if (ipv4)
746 ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes);
747
748 if (tcp_payload_len > mss) {
749 struct ieee80211_tx_info *skb_info =
750 IEEE80211_SKB_CB(tmp);
751
752 num_subframes = DIV_ROUND_UP(tcp_payload_len, mss);
753 amsdu_add = num_subframes * sizeof(struct ethhdr) +
754 (num_subframes - 1) * (snap_ip_tcp + pad);
755 skb_info->driver_data[0] =
756 (void *)(uintptr_t)amsdu_add;
757 skb_shinfo(tmp)->gso_size = mss;
758 } else {
759 qc = ieee80211_get_qos_ctl((void *)tmp->data);
760
761 if (ipv4)
762 ip_send_check(ip_hdr(tmp));
763 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
764 skb_shinfo(tmp)->gso_size = 0;
765 }
766
767 tmp->prev = NULL;
768 tmp->next = NULL;
769
770 __skb_queue_tail(mpdus_skb, tmp);
771 i++;
772 }
773
774 return 0;
775 }
776 #else /* CONFIG_INET */
777 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
778 struct ieee80211_tx_info *info,
779 struct ieee80211_sta *sta,
780 struct sk_buff_head *mpdus_skb)
781 {
782 /* Impossible to get TSO with CONFIG_INET */
783 WARN_ON(1);
784
785 return -1;
786 }
787 #endif
788
789 static void iwl_mvm_tx_add_stream(struct iwl_mvm *mvm,
790 struct iwl_mvm_sta *mvm_sta, u8 tid,
791 struct sk_buff *skb)
792 {
793 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
794 u8 mac_queue = info->hw_queue;
795 struct sk_buff_head *deferred_tx_frames;
796
797 lockdep_assert_held(&mvm_sta->lock);
798
799 mvm_sta->deferred_traffic_tid_map |= BIT(tid);
800 set_bit(mvm_sta->sta_id, mvm->sta_deferred_frames);
801
802 deferred_tx_frames = &mvm_sta->tid_data[tid].deferred_tx_frames;
803
804 skb_queue_tail(deferred_tx_frames, skb);
805
806 /*
807 * The first deferred frame should've stopped the MAC queues, so we
808 * should never get a second deferred frame for the RA/TID.
809 */
810 if (!WARN(skb_queue_len(deferred_tx_frames) != 1,
811 "RATID %d/%d has %d deferred frames\n", mvm_sta->sta_id, tid,
812 skb_queue_len(deferred_tx_frames))) {
813 iwl_mvm_stop_mac_queues(mvm, BIT(mac_queue));
814 schedule_work(&mvm->add_stream_wk);
815 }
816 }
817
818 /*
819 * Sets the fields in the Tx cmd that are crypto related
820 */
821 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb,
822 struct ieee80211_tx_info *info,
823 struct ieee80211_sta *sta)
824 {
825 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
826 struct iwl_mvm_sta *mvmsta;
827 struct iwl_device_cmd *dev_cmd;
828 struct iwl_tx_cmd *tx_cmd;
829 __le16 fc;
830 u16 seq_number = 0;
831 u8 tid = IWL_MAX_TID_COUNT;
832 u8 txq_id = info->hw_queue;
833 bool is_ampdu = false;
834 int hdrlen;
835
836 mvmsta = iwl_mvm_sta_from_mac80211(sta);
837 fc = hdr->frame_control;
838 hdrlen = ieee80211_hdrlen(fc);
839
840 if (WARN_ON_ONCE(!mvmsta))
841 return -1;
842
843 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
844 return -1;
845
846 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen,
847 sta, mvmsta->sta_id);
848 if (!dev_cmd)
849 goto drop;
850
851 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
852 /* From now on, we cannot access info->control */
853
854 /*
855 * we handle that entirely ourselves -- for uAPSD the firmware
856 * will always send a notification, and for PS-Poll responses
857 * we'll notify mac80211 when getting frame status
858 */
859 info->flags &= ~IEEE80211_TX_STATUS_EOSP;
860
861 spin_lock(&mvmsta->lock);
862
863 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
864 u8 *qc = NULL;
865 qc = ieee80211_get_qos_ctl(hdr);
866 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
867 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
868 goto drop_unlock_sta;
869
870 seq_number = mvmsta->tid_data[tid].seq_number;
871 seq_number &= IEEE80211_SCTL_SEQ;
872 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
873 hdr->seq_ctrl |= cpu_to_le16(seq_number);
874 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU;
875 } else if (iwl_mvm_is_dqa_supported(mvm) &&
876 (ieee80211_is_qos_nullfunc(fc) ||
877 ieee80211_is_nullfunc(fc))) {
878 /*
879 * nullfunc frames should go to the MGMT queue regardless of QOS
880 */
881 tid = IWL_MAX_TID_COUNT;
882 txq_id = mvmsta->tid_data[tid].txq_id;
883 }
884
885 /* Copy MAC header from skb into command buffer */
886 memcpy(tx_cmd->hdr, hdr, hdrlen);
887
888 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
889
890 if (sta->tdls) {
891 /* default to TID 0 for non-QoS packets */
892 u8 tdls_tid = tid == IWL_MAX_TID_COUNT ? 0 : tid;
893
894 txq_id = mvmsta->hw_queue[tid_to_mac80211_ac[tdls_tid]];
895 }
896
897 if (is_ampdu) {
898 if (WARN_ON_ONCE(mvmsta->tid_data[tid].state != IWL_AGG_ON))
899 goto drop_unlock_sta;
900 txq_id = mvmsta->tid_data[tid].txq_id;
901 }
902
903 if (iwl_mvm_is_dqa_supported(mvm)) {
904 if (unlikely(mvmsta->tid_data[tid].txq_id ==
905 IEEE80211_INVAL_HW_QUEUE)) {
906 iwl_mvm_tx_add_stream(mvm, mvmsta, tid, skb);
907
908 /*
909 * The frame is now deferred, and the worker scheduled
910 * will re-allocate it, so we can free it for now.
911 */
912 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
913 spin_unlock(&mvmsta->lock);
914 return 0;
915 }
916
917 txq_id = mvmsta->tid_data[tid].txq_id;
918 }
919
920 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id,
921 tid, txq_id, IEEE80211_SEQ_TO_SN(seq_number));
922
923 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id))
924 goto drop_unlock_sta;
925
926 if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc))
927 mvmsta->tid_data[tid].seq_number = seq_number + 0x10;
928
929 spin_unlock(&mvmsta->lock);
930
931 if (txq_id < mvm->first_agg_queue)
932 atomic_inc(&mvm->pending_frames[mvmsta->sta_id]);
933
934 return 0;
935
936 drop_unlock_sta:
937 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
938 spin_unlock(&mvmsta->lock);
939 drop:
940 return -1;
941 }
942
943 int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb,
944 struct ieee80211_sta *sta)
945 {
946 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
947 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb);
948 struct ieee80211_tx_info info;
949 struct sk_buff_head mpdus_skbs;
950 unsigned int payload_len;
951 int ret;
952
953 if (WARN_ON_ONCE(!mvmsta))
954 return -1;
955
956 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
957 return -1;
958
959 memcpy(&info, skb->cb, sizeof(info));
960
961 /* This holds the amsdu headers length */
962 skb_info->driver_data[0] = (void *)(uintptr_t)0;
963
964 if (!skb_is_gso(skb))
965 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
966
967 payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
968 tcp_hdrlen(skb) + skb->data_len;
969
970 if (payload_len <= skb_shinfo(skb)->gso_size)
971 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
972
973 __skb_queue_head_init(&mpdus_skbs);
974
975 ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs);
976 if (ret)
977 return ret;
978
979 if (WARN_ON(skb_queue_empty(&mpdus_skbs)))
980 return ret;
981
982 while (!skb_queue_empty(&mpdus_skbs)) {
983 skb = __skb_dequeue(&mpdus_skbs);
984
985 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
986 if (ret) {
987 __skb_queue_purge(&mpdus_skbs);
988 return ret;
989 }
990 }
991
992 return 0;
993 }
994
995 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm,
996 struct ieee80211_sta *sta, u8 tid)
997 {
998 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
999 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1000 struct ieee80211_vif *vif = mvmsta->vif;
1001
1002 lockdep_assert_held(&mvmsta->lock);
1003
1004 if ((tid_data->state == IWL_AGG_ON ||
1005 tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) &&
1006 iwl_mvm_tid_queued(tid_data) == 0) {
1007 /*
1008 * Now that this aggregation queue is empty tell mac80211 so it
1009 * knows we no longer have frames buffered for the station on
1010 * this TID (for the TIM bitmap calculation.)
1011 */
1012 ieee80211_sta_set_buffered(sta, tid, false);
1013 }
1014
1015 if (tid_data->ssn != tid_data->next_reclaimed)
1016 return;
1017
1018 switch (tid_data->state) {
1019 case IWL_EMPTYING_HW_QUEUE_ADDBA:
1020 IWL_DEBUG_TX_QUEUES(mvm,
1021 "Can continue addBA flow ssn = next_recl = %d\n",
1022 tid_data->next_reclaimed);
1023 tid_data->state = IWL_AGG_STARTING;
1024 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1025 break;
1026
1027 case IWL_EMPTYING_HW_QUEUE_DELBA:
1028 IWL_DEBUG_TX_QUEUES(mvm,
1029 "Can continue DELBA flow ssn = next_recl = %d\n",
1030 tid_data->next_reclaimed);
1031 iwl_mvm_disable_txq(mvm, tid_data->txq_id,
1032 vif->hw_queue[tid_to_mac80211_ac[tid]], tid,
1033 CMD_ASYNC);
1034 tid_data->state = IWL_AGG_OFF;
1035 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1036 break;
1037
1038 default:
1039 break;
1040 }
1041 }
1042
1043 #ifdef CONFIG_IWLWIFI_DEBUG
1044 const char *iwl_mvm_get_tx_fail_reason(u32 status)
1045 {
1046 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
1047 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
1048
1049 switch (status & TX_STATUS_MSK) {
1050 case TX_STATUS_SUCCESS:
1051 return "SUCCESS";
1052 TX_STATUS_POSTPONE(DELAY);
1053 TX_STATUS_POSTPONE(FEW_BYTES);
1054 TX_STATUS_POSTPONE(BT_PRIO);
1055 TX_STATUS_POSTPONE(QUIET_PERIOD);
1056 TX_STATUS_POSTPONE(CALC_TTAK);
1057 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
1058 TX_STATUS_FAIL(SHORT_LIMIT);
1059 TX_STATUS_FAIL(LONG_LIMIT);
1060 TX_STATUS_FAIL(UNDERRUN);
1061 TX_STATUS_FAIL(DRAIN_FLOW);
1062 TX_STATUS_FAIL(RFKILL_FLUSH);
1063 TX_STATUS_FAIL(LIFE_EXPIRE);
1064 TX_STATUS_FAIL(DEST_PS);
1065 TX_STATUS_FAIL(HOST_ABORTED);
1066 TX_STATUS_FAIL(BT_RETRY);
1067 TX_STATUS_FAIL(STA_INVALID);
1068 TX_STATUS_FAIL(FRAG_DROPPED);
1069 TX_STATUS_FAIL(TID_DISABLE);
1070 TX_STATUS_FAIL(FIFO_FLUSHED);
1071 TX_STATUS_FAIL(SMALL_CF_POLL);
1072 TX_STATUS_FAIL(FW_DROP);
1073 TX_STATUS_FAIL(STA_COLOR_MISMATCH);
1074 }
1075
1076 return "UNKNOWN";
1077
1078 #undef TX_STATUS_FAIL
1079 #undef TX_STATUS_POSTPONE
1080 }
1081 #endif /* CONFIG_IWLWIFI_DEBUG */
1082
1083 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags,
1084 enum nl80211_band band,
1085 struct ieee80211_tx_rate *r)
1086 {
1087 if (rate_n_flags & RATE_HT_MCS_GF_MSK)
1088 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
1089 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
1090 case RATE_MCS_CHAN_WIDTH_20:
1091 break;
1092 case RATE_MCS_CHAN_WIDTH_40:
1093 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
1094 break;
1095 case RATE_MCS_CHAN_WIDTH_80:
1096 r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH;
1097 break;
1098 case RATE_MCS_CHAN_WIDTH_160:
1099 r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH;
1100 break;
1101 }
1102 if (rate_n_flags & RATE_MCS_SGI_MSK)
1103 r->flags |= IEEE80211_TX_RC_SHORT_GI;
1104 if (rate_n_flags & RATE_MCS_HT_MSK) {
1105 r->flags |= IEEE80211_TX_RC_MCS;
1106 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
1107 } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
1108 ieee80211_rate_set_vht(
1109 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK,
1110 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
1111 RATE_VHT_MCS_NSS_POS) + 1);
1112 r->flags |= IEEE80211_TX_RC_VHT_MCS;
1113 } else {
1114 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
1115 band);
1116 }
1117 }
1118
1119 /**
1120 * translate ucode response to mac80211 tx status control values
1121 */
1122 static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags,
1123 struct ieee80211_tx_info *info)
1124 {
1125 struct ieee80211_tx_rate *r = &info->status.rates[0];
1126
1127 info->status.antenna =
1128 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
1129 iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r);
1130 }
1131
1132 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm,
1133 u32 status)
1134 {
1135 struct iwl_fw_dbg_trigger_tlv *trig;
1136 struct iwl_fw_dbg_trigger_tx_status *status_trig;
1137 int i;
1138
1139 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TX_STATUS))
1140 return;
1141
1142 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TX_STATUS);
1143 status_trig = (void *)trig->data;
1144
1145 if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig))
1146 return;
1147
1148 for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) {
1149 /* don't collect on status 0 */
1150 if (!status_trig->statuses[i].status)
1151 break;
1152
1153 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK))
1154 continue;
1155
1156 iwl_mvm_fw_dbg_collect_trig(mvm, trig,
1157 "Tx status %d was received",
1158 status & TX_STATUS_MSK);
1159 break;
1160 }
1161 }
1162
1163 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm,
1164 struct iwl_rx_packet *pkt)
1165 {
1166 struct ieee80211_sta *sta;
1167 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1168 int txq_id = SEQ_TO_QUEUE(sequence);
1169 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1170 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1171 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1172 u32 status = le16_to_cpu(tx_resp->status.status);
1173 u16 ssn = iwl_mvm_get_scd_ssn(tx_resp);
1174 struct iwl_mvm_sta *mvmsta;
1175 struct sk_buff_head skbs;
1176 u8 skb_freed = 0;
1177 u16 next_reclaimed, seq_ctl;
1178 bool is_ndp = false;
1179
1180 __skb_queue_head_init(&skbs);
1181
1182 seq_ctl = le16_to_cpu(tx_resp->seq_ctl);
1183
1184 /* we can free until ssn % q.n_bd not inclusive */
1185 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs);
1186
1187 while (!skb_queue_empty(&skbs)) {
1188 struct sk_buff *skb = __skb_dequeue(&skbs);
1189 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1190
1191 skb_freed++;
1192
1193 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1194
1195 memset(&info->status, 0, sizeof(info->status));
1196
1197 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1198
1199 /* inform mac80211 about what happened with the frame */
1200 switch (status & TX_STATUS_MSK) {
1201 case TX_STATUS_SUCCESS:
1202 case TX_STATUS_DIRECT_DONE:
1203 info->flags |= IEEE80211_TX_STAT_ACK;
1204 break;
1205 case TX_STATUS_FAIL_DEST_PS:
1206 info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
1207 break;
1208 default:
1209 break;
1210 }
1211
1212 iwl_mvm_tx_status_check_trigger(mvm, status);
1213
1214 info->status.rates[0].count = tx_resp->failure_frame + 1;
1215 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate),
1216 info);
1217 info->status.status_driver_data[1] =
1218 (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate);
1219
1220 /* Single frame failure in an AMPDU queue => send BAR */
1221 if (txq_id >= mvm->first_agg_queue &&
1222 !(info->flags & IEEE80211_TX_STAT_ACK) &&
1223 !(info->flags & IEEE80211_TX_STAT_TX_FILTERED))
1224 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1225
1226 /* W/A FW bug: seq_ctl is wrong when the status isn't success */
1227 if (status != TX_STATUS_SUCCESS) {
1228 struct ieee80211_hdr *hdr = (void *)skb->data;
1229 seq_ctl = le16_to_cpu(hdr->seq_ctrl);
1230 }
1231
1232 if (unlikely(!seq_ctl)) {
1233 struct ieee80211_hdr *hdr = (void *)skb->data;
1234
1235 /*
1236 * If it is an NDP, we can't update next_reclaim since
1237 * its sequence control is 0. Note that for that same
1238 * reason, NDPs are never sent to A-MPDU'able queues
1239 * so that we can never have more than one freed frame
1240 * for a single Tx resonse (see WARN_ON below).
1241 */
1242 if (ieee80211_is_qos_nullfunc(hdr->frame_control))
1243 is_ndp = true;
1244 }
1245
1246 /*
1247 * TODO: this is not accurate if we are freeing more than one
1248 * packet.
1249 */
1250 info->status.tx_time =
1251 le16_to_cpu(tx_resp->wireless_media_time);
1252 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1);
1253 info->status.status_driver_data[0] =
1254 (void *)(uintptr_t)tx_resp->reduced_tpc;
1255
1256 ieee80211_tx_status(mvm->hw, skb);
1257 }
1258
1259 if (txq_id >= mvm->first_agg_queue) {
1260 /* If this is an aggregation queue, we use the ssn since:
1261 * ssn = wifi seq_num % 256.
1262 * The seq_ctl is the sequence control of the packet to which
1263 * this Tx response relates. But if there is a hole in the
1264 * bitmap of the BA we received, this Tx response may allow to
1265 * reclaim the hole and all the subsequent packets that were
1266 * already acked. In that case, seq_ctl != ssn, and the next
1267 * packet to be reclaimed will be ssn and not seq_ctl. In that
1268 * case, several packets will be reclaimed even if
1269 * frame_count = 1.
1270 *
1271 * The ssn is the index (% 256) of the latest packet that has
1272 * treated (acked / dropped) + 1.
1273 */
1274 next_reclaimed = ssn;
1275 } else {
1276 /* The next packet to be reclaimed is the one after this one */
1277 next_reclaimed = IEEE80211_SEQ_TO_SN(seq_ctl + 0x10);
1278 }
1279
1280 IWL_DEBUG_TX_REPLY(mvm,
1281 "TXQ %d status %s (0x%08x)\n",
1282 txq_id, iwl_mvm_get_tx_fail_reason(status), status);
1283
1284 IWL_DEBUG_TX_REPLY(mvm,
1285 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
1286 le32_to_cpu(tx_resp->initial_rate),
1287 tx_resp->failure_frame, SEQ_TO_INDEX(sequence),
1288 ssn, next_reclaimed, seq_ctl);
1289
1290 rcu_read_lock();
1291
1292 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1293 /*
1294 * sta can't be NULL otherwise it'd mean that the sta has been freed in
1295 * the firmware while we still have packets for it in the Tx queues.
1296 */
1297 if (WARN_ON_ONCE(!sta))
1298 goto out;
1299
1300 if (!IS_ERR(sta)) {
1301 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1302
1303 if (tid != IWL_TID_NON_QOS) {
1304 struct iwl_mvm_tid_data *tid_data =
1305 &mvmsta->tid_data[tid];
1306 bool send_eosp_ndp = false;
1307
1308 spin_lock_bh(&mvmsta->lock);
1309 if (!is_ndp) {
1310 tid_data->next_reclaimed = next_reclaimed;
1311 IWL_DEBUG_TX_REPLY(mvm,
1312 "Next reclaimed packet:%d\n",
1313 next_reclaimed);
1314 } else {
1315 IWL_DEBUG_TX_REPLY(mvm,
1316 "NDP - don't update next_reclaimed\n");
1317 }
1318
1319 iwl_mvm_check_ratid_empty(mvm, sta, tid);
1320
1321 if (mvmsta->sleep_tx_count) {
1322 mvmsta->sleep_tx_count--;
1323 if (mvmsta->sleep_tx_count &&
1324 !iwl_mvm_tid_queued(tid_data)) {
1325 /*
1326 * The number of frames in the queue
1327 * dropped to 0 even if we sent less
1328 * frames than we thought we had on the
1329 * Tx queue.
1330 * This means we had holes in the BA
1331 * window that we just filled, ask
1332 * mac80211 to send EOSP since the
1333 * firmware won't know how to do that.
1334 * Send NDP and the firmware will send
1335 * EOSP notification that will trigger
1336 * a call to ieee80211_sta_eosp().
1337 */
1338 send_eosp_ndp = true;
1339 }
1340 }
1341
1342 spin_unlock_bh(&mvmsta->lock);
1343 if (send_eosp_ndp) {
1344 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta,
1345 IEEE80211_FRAME_RELEASE_UAPSD,
1346 1, tid, false, false);
1347 mvmsta->sleep_tx_count = 0;
1348 ieee80211_send_eosp_nullfunc(sta, tid);
1349 }
1350 }
1351
1352 if (mvmsta->next_status_eosp) {
1353 mvmsta->next_status_eosp = false;
1354 ieee80211_sta_eosp(sta);
1355 }
1356 } else {
1357 mvmsta = NULL;
1358 }
1359
1360 /*
1361 * If the txq is not an AMPDU queue, there is no chance we freed
1362 * several skbs. Check that out...
1363 */
1364 if (txq_id >= mvm->first_agg_queue)
1365 goto out;
1366
1367 /* We can't free more than one frame at once on a shared queue */
1368 WARN_ON(skb_freed > 1);
1369
1370 /* If we have still frames for this STA nothing to do here */
1371 if (!atomic_sub_and_test(skb_freed, &mvm->pending_frames[sta_id]))
1372 goto out;
1373
1374 if (mvmsta && mvmsta->vif->type == NL80211_IFTYPE_AP) {
1375
1376 /*
1377 * If there are no pending frames for this STA and
1378 * the tx to this station is not disabled, notify
1379 * mac80211 that this station can now wake up in its
1380 * STA table.
1381 * If mvmsta is not NULL, sta is valid.
1382 */
1383
1384 spin_lock_bh(&mvmsta->lock);
1385
1386 if (!mvmsta->disable_tx)
1387 ieee80211_sta_block_awake(mvm->hw, sta, false);
1388
1389 spin_unlock_bh(&mvmsta->lock);
1390 }
1391
1392 if (PTR_ERR(sta) == -EBUSY || PTR_ERR(sta) == -ENOENT) {
1393 /*
1394 * We are draining and this was the last packet - pre_rcu_remove
1395 * has been called already. We might be after the
1396 * synchronize_net already.
1397 * Don't rely on iwl_mvm_rm_sta to see the empty Tx queues.
1398 */
1399 set_bit(sta_id, mvm->sta_drained);
1400 schedule_work(&mvm->sta_drained_wk);
1401 }
1402
1403 out:
1404 rcu_read_unlock();
1405 }
1406
1407 #ifdef CONFIG_IWLWIFI_DEBUG
1408 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
1409 static const char *iwl_get_agg_tx_status(u16 status)
1410 {
1411 switch (status & AGG_TX_STATE_STATUS_MSK) {
1412 AGG_TX_STATE_(TRANSMITTED);
1413 AGG_TX_STATE_(UNDERRUN);
1414 AGG_TX_STATE_(BT_PRIO);
1415 AGG_TX_STATE_(FEW_BYTES);
1416 AGG_TX_STATE_(ABORT);
1417 AGG_TX_STATE_(LAST_SENT_TTL);
1418 AGG_TX_STATE_(LAST_SENT_TRY_CNT);
1419 AGG_TX_STATE_(LAST_SENT_BT_KILL);
1420 AGG_TX_STATE_(SCD_QUERY);
1421 AGG_TX_STATE_(TEST_BAD_CRC32);
1422 AGG_TX_STATE_(RESPONSE);
1423 AGG_TX_STATE_(DUMP_TX);
1424 AGG_TX_STATE_(DELAY_TX);
1425 }
1426
1427 return "UNKNOWN";
1428 }
1429
1430 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1431 struct iwl_rx_packet *pkt)
1432 {
1433 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1434 struct agg_tx_status *frame_status = &tx_resp->status;
1435 int i;
1436
1437 for (i = 0; i < tx_resp->frame_count; i++) {
1438 u16 fstatus = le16_to_cpu(frame_status[i].status);
1439
1440 IWL_DEBUG_TX_REPLY(mvm,
1441 "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
1442 iwl_get_agg_tx_status(fstatus),
1443 fstatus & AGG_TX_STATE_STATUS_MSK,
1444 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >>
1445 AGG_TX_STATE_TRY_CNT_POS,
1446 le16_to_cpu(frame_status[i].sequence));
1447 }
1448 }
1449 #else
1450 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1451 struct iwl_rx_packet *pkt)
1452 {}
1453 #endif /* CONFIG_IWLWIFI_DEBUG */
1454
1455 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm,
1456 struct iwl_rx_packet *pkt)
1457 {
1458 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1459 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1460 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1461 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1462 struct ieee80211_sta *sta;
1463
1464 if (WARN_ON_ONCE(SEQ_TO_QUEUE(sequence) < mvm->first_agg_queue))
1465 return;
1466
1467 if (WARN_ON_ONCE(tid == IWL_TID_NON_QOS))
1468 return;
1469
1470 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt);
1471
1472 rcu_read_lock();
1473
1474 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1475
1476 if (!WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
1477 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1478 mvmsta->tid_data[tid].rate_n_flags =
1479 le32_to_cpu(tx_resp->initial_rate);
1480 mvmsta->tid_data[tid].tx_time =
1481 le16_to_cpu(tx_resp->wireless_media_time);
1482 }
1483
1484 rcu_read_unlock();
1485 }
1486
1487 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1488 {
1489 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1490 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1491
1492 if (tx_resp->frame_count == 1)
1493 iwl_mvm_rx_tx_cmd_single(mvm, pkt);
1494 else
1495 iwl_mvm_rx_tx_cmd_agg(mvm, pkt);
1496 }
1497
1498 static void iwl_mvm_tx_info_from_ba_notif(struct ieee80211_tx_info *info,
1499 struct iwl_mvm_ba_notif *ba_notif,
1500 struct iwl_mvm_tid_data *tid_data)
1501 {
1502 info->flags |= IEEE80211_TX_STAT_AMPDU;
1503 info->status.ampdu_ack_len = ba_notif->txed_2_done;
1504 info->status.ampdu_len = ba_notif->txed;
1505 iwl_mvm_hwrate_to_tx_status(tid_data->rate_n_flags,
1506 info);
1507 /* TODO: not accounted if the whole A-MPDU failed */
1508 info->status.tx_time = tid_data->tx_time;
1509 info->status.status_driver_data[0] =
1510 (void *)(uintptr_t)ba_notif->reduced_txp;
1511 info->status.status_driver_data[1] =
1512 (void *)(uintptr_t)tid_data->rate_n_flags;
1513 }
1514
1515 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1516 {
1517 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1518 struct iwl_mvm_ba_notif *ba_notif = (void *)pkt->data;
1519 struct sk_buff_head reclaimed_skbs;
1520 struct iwl_mvm_tid_data *tid_data;
1521 struct ieee80211_sta *sta;
1522 struct iwl_mvm_sta *mvmsta;
1523 struct sk_buff *skb;
1524 int sta_id, tid, freed;
1525 /* "flow" corresponds to Tx queue */
1526 u16 scd_flow = le16_to_cpu(ba_notif->scd_flow);
1527 /* "ssn" is start of block-ack Tx window, corresponds to index
1528 * (in Tx queue's circular buffer) of first TFD/frame in window */
1529 u16 ba_resp_scd_ssn = le16_to_cpu(ba_notif->scd_ssn);
1530
1531 sta_id = ba_notif->sta_id;
1532 tid = ba_notif->tid;
1533
1534 if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT ||
1535 tid >= IWL_MAX_TID_COUNT,
1536 "sta_id %d tid %d", sta_id, tid))
1537 return;
1538
1539 rcu_read_lock();
1540
1541 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1542
1543 /* Reclaiming frames for a station that has been deleted ? */
1544 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
1545 rcu_read_unlock();
1546 return;
1547 }
1548
1549 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1550 tid_data = &mvmsta->tid_data[tid];
1551
1552 if (tid_data->txq_id != scd_flow) {
1553 IWL_ERR(mvm,
1554 "invalid BA notification: Q %d, tid %d, flow %d\n",
1555 tid_data->txq_id, tid, scd_flow);
1556 rcu_read_unlock();
1557 return;
1558 }
1559
1560 spin_lock_bh(&mvmsta->lock);
1561
1562 __skb_queue_head_init(&reclaimed_skbs);
1563
1564 /*
1565 * Release all TFDs before the SSN, i.e. all TFDs in front of
1566 * block-ack window (we assume that they've been successfully
1567 * transmitted ... if not, it's too late anyway).
1568 */
1569 iwl_trans_reclaim(mvm->trans, scd_flow, ba_resp_scd_ssn,
1570 &reclaimed_skbs);
1571
1572 IWL_DEBUG_TX_REPLY(mvm,
1573 "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
1574 (u8 *)&ba_notif->sta_addr_lo32,
1575 ba_notif->sta_id);
1576 IWL_DEBUG_TX_REPLY(mvm,
1577 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
1578 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl),
1579 (unsigned long long)le64_to_cpu(ba_notif->bitmap),
1580 scd_flow, ba_resp_scd_ssn, ba_notif->txed,
1581 ba_notif->txed_2_done);
1582
1583 IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n",
1584 ba_notif->reduced_txp);
1585 tid_data->next_reclaimed = ba_resp_scd_ssn;
1586
1587 iwl_mvm_check_ratid_empty(mvm, sta, tid);
1588
1589 freed = 0;
1590
1591 skb_queue_walk(&reclaimed_skbs, skb) {
1592 struct ieee80211_hdr *hdr = (void *)skb->data;
1593 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1594
1595 if (ieee80211_is_data_qos(hdr->frame_control))
1596 freed++;
1597 else
1598 WARN_ON_ONCE(1);
1599
1600 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1601
1602 memset(&info->status, 0, sizeof(info->status));
1603 /* Packet was transmitted successfully, failures come as single
1604 * frames because before failing a frame the firmware transmits
1605 * it without aggregation at least once.
1606 */
1607 info->flags |= IEEE80211_TX_STAT_ACK;
1608
1609 /* this is the first skb we deliver in this batch */
1610 /* put the rate scaling data there */
1611 if (freed == 1)
1612 iwl_mvm_tx_info_from_ba_notif(info, ba_notif, tid_data);
1613 }
1614
1615 spin_unlock_bh(&mvmsta->lock);
1616
1617 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is
1618 * possible (i.e. first MPDU in the aggregation wasn't acked)
1619 * Still it's important to update RS about sent vs. acked.
1620 */
1621 if (skb_queue_empty(&reclaimed_skbs)) {
1622 struct ieee80211_tx_info ba_info = {};
1623 struct ieee80211_chanctx_conf *chanctx_conf = NULL;
1624
1625 if (mvmsta->vif)
1626 chanctx_conf =
1627 rcu_dereference(mvmsta->vif->chanctx_conf);
1628
1629 if (WARN_ON_ONCE(!chanctx_conf))
1630 goto out;
1631
1632 ba_info.band = chanctx_conf->def.chan->band;
1633 iwl_mvm_tx_info_from_ba_notif(&ba_info, ba_notif, tid_data);
1634
1635 IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n");
1636 iwl_mvm_rs_tx_status(mvm, sta, tid, &ba_info);
1637 }
1638
1639 out:
1640 rcu_read_unlock();
1641
1642 while (!skb_queue_empty(&reclaimed_skbs)) {
1643 skb = __skb_dequeue(&reclaimed_skbs);
1644 ieee80211_tx_status(mvm->hw, skb);
1645 }
1646 }
1647
1648 /*
1649 * Note that there are transports that buffer frames before they reach
1650 * the firmware. This means that after flush_tx_path is called, the
1651 * queue might not be empty. The race-free way to handle this is to:
1652 * 1) set the station as draining
1653 * 2) flush the Tx path
1654 * 3) wait for the transport queues to be empty
1655 */
1656 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, u32 flags)
1657 {
1658 int ret;
1659 struct iwl_tx_path_flush_cmd flush_cmd = {
1660 .queues_ctl = cpu_to_le32(tfd_msk),
1661 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH),
1662 };
1663
1664 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags,
1665 sizeof(flush_cmd), &flush_cmd);
1666 if (ret)
1667 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
1668 return ret;
1669 }
Linux kernel - Deliverables
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