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iwlwifi: mvm: use helpers to get iwl_mvm_sta
[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 if (info->control.vif->type == NL80211_IFTYPE_AP &&
483 ieee80211_is_probe_resp(fc))
484 return IWL_MVM_DQA_AP_PROBE_RESP_QUEUE;
485 else if (ieee80211_is_mgmt(fc) &&
486 info->control.vif->type == NL80211_IFTYPE_P2P_DEVICE)
487 return IWL_MVM_DQA_P2P_DEVICE_QUEUE;
488 }
489
490 return info->hw_queue;
491 }
492
493 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb)
494 {
495 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
496 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb);
497 struct ieee80211_tx_info info;
498 struct iwl_device_cmd *dev_cmd;
499 struct iwl_tx_cmd *tx_cmd;
500 u8 sta_id;
501 int hdrlen = ieee80211_hdrlen(hdr->frame_control);
502 int queue;
503
504 memcpy(&info, skb->cb, sizeof(info));
505
506 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU))
507 return -1;
508
509 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM &&
510 (!info.control.vif ||
511 info.hw_queue != info.control.vif->cab_queue)))
512 return -1;
513
514 /* This holds the amsdu headers length */
515 skb_info->driver_data[0] = (void *)(uintptr_t)0;
516
517 /*
518 * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets that can be used
519 * in 2 different types of vifs, P2P & STATION. P2P uses the offchannel
520 * queue. STATION (HS2.0) uses the auxiliary context of the FW,
521 * and hence needs to be sent on the aux queue
522 */
523 if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
524 info.control.vif->type == NL80211_IFTYPE_STATION)
525 IEEE80211_SKB_CB(skb)->hw_queue = mvm->aux_queue;
526
527 queue = info.hw_queue;
528
529 /*
530 * If the interface on which the frame is sent is the P2P_DEVICE
531 * or an AP/GO interface use the broadcast station associated
532 * with it; otherwise if the interface is a managed interface
533 * use the AP station associated with it for multicast traffic
534 * (this is not possible for unicast packets as a TLDS discovery
535 * response are sent without a station entry); otherwise use the
536 * AUX station.
537 */
538 sta_id = mvm->aux_sta.sta_id;
539 if (info.control.vif) {
540 struct iwl_mvm_vif *mvmvif =
541 iwl_mvm_vif_from_mac80211(info.control.vif);
542
543 if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE ||
544 info.control.vif->type == NL80211_IFTYPE_AP) {
545 sta_id = mvmvif->bcast_sta.sta_id;
546 queue = iwl_mvm_get_ctrl_vif_queue(mvm, &info,
547 hdr->frame_control);
548 } else if (info.control.vif->type == NL80211_IFTYPE_STATION &&
549 is_multicast_ether_addr(hdr->addr1)) {
550 u8 ap_sta_id = ACCESS_ONCE(mvmvif->ap_sta_id);
551
552 if (ap_sta_id != IWL_MVM_STATION_COUNT)
553 sta_id = ap_sta_id;
554 }
555 }
556
557 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue);
558
559 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id);
560 if (!dev_cmd)
561 return -1;
562
563 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
564
565 /* Copy MAC header from skb into command buffer */
566 memcpy(tx_cmd->hdr, hdr, hdrlen);
567
568 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) {
569 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
570 return -1;
571 }
572
573 /*
574 * Increase the pending frames counter, so that later when a reply comes
575 * in and the counter is decreased - we don't start getting negative
576 * values.
577 * Note that we don't need to make sure it isn't agg'd, since we're
578 * TXing non-sta
579 */
580 atomic_inc(&mvm->pending_frames[sta_id]);
581
582 return 0;
583 }
584
585 #ifdef CONFIG_INET
586 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
587 struct ieee80211_tx_info *info,
588 struct ieee80211_sta *sta,
589 struct sk_buff_head *mpdus_skb)
590 {
591 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
592 struct ieee80211_hdr *hdr = (void *)skb->data;
593 unsigned int mss = skb_shinfo(skb)->gso_size;
594 struct sk_buff *tmp, *next;
595 char cb[sizeof(skb->cb)];
596 unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len;
597 bool ipv4 = (skb->protocol == htons(ETH_P_IP));
598 u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0;
599 u16 amsdu_add, snap_ip_tcp, pad, i = 0;
600 unsigned int dbg_max_amsdu_len;
601 netdev_features_t netdev_features = NETIF_F_CSUM_MASK | NETIF_F_SG;
602 u8 *qc, tid, txf;
603
604 snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) +
605 tcp_hdrlen(skb);
606
607 qc = ieee80211_get_qos_ctl(hdr);
608 tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
609 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
610 return -EINVAL;
611
612 dbg_max_amsdu_len = ACCESS_ONCE(mvm->max_amsdu_len);
613
614 if (!sta->max_amsdu_len ||
615 !ieee80211_is_data_qos(hdr->frame_control) ||
616 (!mvmsta->tlc_amsdu && !dbg_max_amsdu_len)) {
617 num_subframes = 1;
618 pad = 0;
619 goto segment;
620 }
621
622 /*
623 * Do not build AMSDU for IPv6 with extension headers.
624 * ask stack to segment and checkum the generated MPDUs for us.
625 */
626 if (skb->protocol == htons(ETH_P_IPV6) &&
627 ((struct ipv6hdr *)skb_network_header(skb))->nexthdr !=
628 IPPROTO_TCP) {
629 num_subframes = 1;
630 pad = 0;
631 netdev_features &= ~NETIF_F_CSUM_MASK;
632 goto segment;
633 }
634
635 /*
636 * No need to lock amsdu_in_ampdu_allowed since it can't be modified
637 * during an BA session.
638 */
639 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
640 !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) {
641 num_subframes = 1;
642 pad = 0;
643 goto segment;
644 }
645
646 max_amsdu_len = sta->max_amsdu_len;
647
648 /* the Tx FIFO to which this A-MSDU will be routed */
649 txf = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
650
651 /*
652 * Don't send an AMSDU that will be longer than the TXF.
653 * Add a security margin of 256 for the TX command + headers.
654 * We also want to have the start of the next packet inside the
655 * fifo to be able to send bursts.
656 */
657 max_amsdu_len = min_t(unsigned int, max_amsdu_len,
658 mvm->shared_mem_cfg.txfifo_size[txf] - 256);
659
660 if (unlikely(dbg_max_amsdu_len))
661 max_amsdu_len = min_t(unsigned int, max_amsdu_len,
662 dbg_max_amsdu_len);
663
664 /*
665 * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not
666 * supported. This is a spec requirement (IEEE 802.11-2015
667 * section 8.7.3 NOTE 3).
668 */
669 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
670 !sta->vht_cap.vht_supported)
671 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095);
672
673 /* Sub frame header + SNAP + IP header + TCP header + MSS */
674 subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss;
675 pad = (4 - subf_len) & 0x3;
676
677 /*
678 * If we have N subframes in the A-MSDU, then the A-MSDU's size is
679 * N * subf_len + (N - 1) * pad.
680 */
681 num_subframes = (max_amsdu_len + pad) / (subf_len + pad);
682 if (num_subframes > 1)
683 *qc |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
684
685 tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
686 tcp_hdrlen(skb) + skb->data_len;
687
688 /*
689 * Make sure we have enough TBs for the A-MSDU:
690 * 2 for each subframe
691 * 1 more for each fragment
692 * 1 more for the potential data in the header
693 */
694 num_subframes =
695 min_t(unsigned int, num_subframes,
696 (mvm->trans->max_skb_frags - 1 -
697 skb_shinfo(skb)->nr_frags) / 2);
698
699 /* This skb fits in one single A-MSDU */
700 if (num_subframes * mss >= tcp_payload_len) {
701 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb);
702
703 /*
704 * Compute the length of all the data added for the A-MSDU.
705 * This will be used to compute the length to write in the TX
706 * command. We have: SNAP + IP + TCP for n -1 subframes and
707 * ETH header for n subframes. Note that the original skb
708 * already had one set of SNAP / IP / TCP headers.
709 */
710 num_subframes = DIV_ROUND_UP(tcp_payload_len, mss);
711 amsdu_add = num_subframes * sizeof(struct ethhdr) +
712 (num_subframes - 1) * (snap_ip_tcp + pad);
713 /* This holds the amsdu headers length */
714 skb_info->driver_data[0] = (void *)(uintptr_t)amsdu_add;
715
716 __skb_queue_tail(mpdus_skb, skb);
717 return 0;
718 }
719
720 /*
721 * Trick the segmentation function to make it
722 * create SKBs that can fit into one A-MSDU.
723 */
724 segment:
725 skb_shinfo(skb)->gso_size = num_subframes * mss;
726 memcpy(cb, skb->cb, sizeof(cb));
727
728 next = skb_gso_segment(skb, netdev_features);
729 skb_shinfo(skb)->gso_size = mss;
730 if (WARN_ON_ONCE(IS_ERR(next)))
731 return -EINVAL;
732 else if (next)
733 consume_skb(skb);
734
735 while (next) {
736 tmp = next;
737 next = tmp->next;
738
739 memcpy(tmp->cb, cb, sizeof(tmp->cb));
740 /*
741 * Compute the length of all the data added for the A-MSDU.
742 * This will be used to compute the length to write in the TX
743 * command. We have: SNAP + IP + TCP for n -1 subframes and
744 * ETH header for n subframes.
745 */
746 tcp_payload_len = skb_tail_pointer(tmp) -
747 skb_transport_header(tmp) -
748 tcp_hdrlen(tmp) + tmp->data_len;
749
750 if (ipv4)
751 ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes);
752
753 if (tcp_payload_len > mss) {
754 struct ieee80211_tx_info *skb_info =
755 IEEE80211_SKB_CB(tmp);
756
757 num_subframes = DIV_ROUND_UP(tcp_payload_len, mss);
758 amsdu_add = num_subframes * sizeof(struct ethhdr) +
759 (num_subframes - 1) * (snap_ip_tcp + pad);
760 skb_info->driver_data[0] =
761 (void *)(uintptr_t)amsdu_add;
762 skb_shinfo(tmp)->gso_size = mss;
763 } else {
764 qc = ieee80211_get_qos_ctl((void *)tmp->data);
765
766 if (ipv4)
767 ip_send_check(ip_hdr(tmp));
768 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
769 skb_shinfo(tmp)->gso_size = 0;
770 }
771
772 tmp->prev = NULL;
773 tmp->next = NULL;
774
775 __skb_queue_tail(mpdus_skb, tmp);
776 i++;
777 }
778
779 return 0;
780 }
781 #else /* CONFIG_INET */
782 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
783 struct ieee80211_tx_info *info,
784 struct ieee80211_sta *sta,
785 struct sk_buff_head *mpdus_skb)
786 {
787 /* Impossible to get TSO with CONFIG_INET */
788 WARN_ON(1);
789
790 return -1;
791 }
792 #endif
793
794 static void iwl_mvm_tx_add_stream(struct iwl_mvm *mvm,
795 struct iwl_mvm_sta *mvm_sta, u8 tid,
796 struct sk_buff *skb)
797 {
798 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
799 u8 mac_queue = info->hw_queue;
800 struct sk_buff_head *deferred_tx_frames;
801
802 lockdep_assert_held(&mvm_sta->lock);
803
804 mvm_sta->deferred_traffic_tid_map |= BIT(tid);
805 set_bit(mvm_sta->sta_id, mvm->sta_deferred_frames);
806
807 deferred_tx_frames = &mvm_sta->tid_data[tid].deferred_tx_frames;
808
809 skb_queue_tail(deferred_tx_frames, skb);
810
811 /*
812 * The first deferred frame should've stopped the MAC queues, so we
813 * should never get a second deferred frame for the RA/TID.
814 */
815 if (!WARN(skb_queue_len(deferred_tx_frames) != 1,
816 "RATID %d/%d has %d deferred frames\n", mvm_sta->sta_id, tid,
817 skb_queue_len(deferred_tx_frames))) {
818 iwl_mvm_stop_mac_queues(mvm, BIT(mac_queue));
819 schedule_work(&mvm->add_stream_wk);
820 }
821 }
822
823 /*
824 * Sets the fields in the Tx cmd that are crypto related
825 */
826 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb,
827 struct ieee80211_tx_info *info,
828 struct ieee80211_sta *sta)
829 {
830 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
831 struct iwl_mvm_sta *mvmsta;
832 struct iwl_device_cmd *dev_cmd;
833 struct iwl_tx_cmd *tx_cmd;
834 __le16 fc;
835 u16 seq_number = 0;
836 u8 tid = IWL_MAX_TID_COUNT;
837 u8 txq_id = info->hw_queue;
838 bool is_ampdu = false;
839 int hdrlen;
840
841 mvmsta = iwl_mvm_sta_from_mac80211(sta);
842 fc = hdr->frame_control;
843 hdrlen = ieee80211_hdrlen(fc);
844
845 if (WARN_ON_ONCE(!mvmsta))
846 return -1;
847
848 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
849 return -1;
850
851 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen,
852 sta, mvmsta->sta_id);
853 if (!dev_cmd)
854 goto drop;
855
856 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
857 /* From now on, we cannot access info->control */
858
859 /*
860 * we handle that entirely ourselves -- for uAPSD the firmware
861 * will always send a notification, and for PS-Poll responses
862 * we'll notify mac80211 when getting frame status
863 */
864 info->flags &= ~IEEE80211_TX_STATUS_EOSP;
865
866 spin_lock(&mvmsta->lock);
867
868 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
869 u8 *qc = NULL;
870 qc = ieee80211_get_qos_ctl(hdr);
871 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
872 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
873 goto drop_unlock_sta;
874
875 seq_number = mvmsta->tid_data[tid].seq_number;
876 seq_number &= IEEE80211_SCTL_SEQ;
877 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
878 hdr->seq_ctrl |= cpu_to_le16(seq_number);
879 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU;
880 } else if (iwl_mvm_is_dqa_supported(mvm) &&
881 (ieee80211_is_qos_nullfunc(fc) ||
882 ieee80211_is_nullfunc(fc))) {
883 /*
884 * nullfunc frames should go to the MGMT queue regardless of QOS
885 */
886 tid = IWL_MAX_TID_COUNT;
887 txq_id = mvmsta->tid_data[tid].txq_id;
888 }
889
890 /* Copy MAC header from skb into command buffer */
891 memcpy(tx_cmd->hdr, hdr, hdrlen);
892
893 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
894
895 if (sta->tdls) {
896 /* default to TID 0 for non-QoS packets */
897 u8 tdls_tid = tid == IWL_MAX_TID_COUNT ? 0 : tid;
898
899 txq_id = mvmsta->hw_queue[tid_to_mac80211_ac[tdls_tid]];
900 }
901
902 if (is_ampdu) {
903 if (WARN_ON_ONCE(mvmsta->tid_data[tid].state != IWL_AGG_ON))
904 goto drop_unlock_sta;
905 txq_id = mvmsta->tid_data[tid].txq_id;
906 }
907
908 if (iwl_mvm_is_dqa_supported(mvm)) {
909 if (unlikely(mvmsta->tid_data[tid].txq_id ==
910 IEEE80211_INVAL_HW_QUEUE)) {
911 iwl_mvm_tx_add_stream(mvm, mvmsta, tid, skb);
912
913 /*
914 * The frame is now deferred, and the worker scheduled
915 * will re-allocate it, so we can free it for now.
916 */
917 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
918 spin_unlock(&mvmsta->lock);
919 return 0;
920 }
921
922 txq_id = mvmsta->tid_data[tid].txq_id;
923 }
924
925 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id,
926 tid, txq_id, IEEE80211_SEQ_TO_SN(seq_number));
927
928 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id))
929 goto drop_unlock_sta;
930
931 if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc))
932 mvmsta->tid_data[tid].seq_number = seq_number + 0x10;
933
934 spin_unlock(&mvmsta->lock);
935
936 if (txq_id < mvm->first_agg_queue)
937 atomic_inc(&mvm->pending_frames[mvmsta->sta_id]);
938
939 return 0;
940
941 drop_unlock_sta:
942 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
943 spin_unlock(&mvmsta->lock);
944 drop:
945 return -1;
946 }
947
948 int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb,
949 struct ieee80211_sta *sta)
950 {
951 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
952 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb);
953 struct ieee80211_tx_info info;
954 struct sk_buff_head mpdus_skbs;
955 unsigned int payload_len;
956 int ret;
957
958 if (WARN_ON_ONCE(!mvmsta))
959 return -1;
960
961 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
962 return -1;
963
964 memcpy(&info, skb->cb, sizeof(info));
965
966 /* This holds the amsdu headers length */
967 skb_info->driver_data[0] = (void *)(uintptr_t)0;
968
969 if (!skb_is_gso(skb))
970 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
971
972 payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
973 tcp_hdrlen(skb) + skb->data_len;
974
975 if (payload_len <= skb_shinfo(skb)->gso_size)
976 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
977
978 __skb_queue_head_init(&mpdus_skbs);
979
980 ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs);
981 if (ret)
982 return ret;
983
984 if (WARN_ON(skb_queue_empty(&mpdus_skbs)))
985 return ret;
986
987 while (!skb_queue_empty(&mpdus_skbs)) {
988 skb = __skb_dequeue(&mpdus_skbs);
989
990 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
991 if (ret) {
992 __skb_queue_purge(&mpdus_skbs);
993 return ret;
994 }
995 }
996
997 return 0;
998 }
999
1000 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm,
1001 struct ieee80211_sta *sta, u8 tid)
1002 {
1003 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1004 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1005 struct ieee80211_vif *vif = mvmsta->vif;
1006
1007 lockdep_assert_held(&mvmsta->lock);
1008
1009 if ((tid_data->state == IWL_AGG_ON ||
1010 tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) &&
1011 iwl_mvm_tid_queued(tid_data) == 0) {
1012 /*
1013 * Now that this aggregation queue is empty tell mac80211 so it
1014 * knows we no longer have frames buffered for the station on
1015 * this TID (for the TIM bitmap calculation.)
1016 */
1017 ieee80211_sta_set_buffered(sta, tid, false);
1018 }
1019
1020 if (tid_data->ssn != tid_data->next_reclaimed)
1021 return;
1022
1023 switch (tid_data->state) {
1024 case IWL_EMPTYING_HW_QUEUE_ADDBA:
1025 IWL_DEBUG_TX_QUEUES(mvm,
1026 "Can continue addBA flow ssn = next_recl = %d\n",
1027 tid_data->next_reclaimed);
1028 tid_data->state = IWL_AGG_STARTING;
1029 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1030 break;
1031
1032 case IWL_EMPTYING_HW_QUEUE_DELBA:
1033 IWL_DEBUG_TX_QUEUES(mvm,
1034 "Can continue DELBA flow ssn = next_recl = %d\n",
1035 tid_data->next_reclaimed);
1036 iwl_mvm_disable_txq(mvm, tid_data->txq_id,
1037 vif->hw_queue[tid_to_mac80211_ac[tid]], tid,
1038 CMD_ASYNC);
1039 tid_data->state = IWL_AGG_OFF;
1040 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1041 break;
1042
1043 default:
1044 break;
1045 }
1046 }
1047
1048 #ifdef CONFIG_IWLWIFI_DEBUG
1049 const char *iwl_mvm_get_tx_fail_reason(u32 status)
1050 {
1051 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
1052 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
1053
1054 switch (status & TX_STATUS_MSK) {
1055 case TX_STATUS_SUCCESS:
1056 return "SUCCESS";
1057 TX_STATUS_POSTPONE(DELAY);
1058 TX_STATUS_POSTPONE(FEW_BYTES);
1059 TX_STATUS_POSTPONE(BT_PRIO);
1060 TX_STATUS_POSTPONE(QUIET_PERIOD);
1061 TX_STATUS_POSTPONE(CALC_TTAK);
1062 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
1063 TX_STATUS_FAIL(SHORT_LIMIT);
1064 TX_STATUS_FAIL(LONG_LIMIT);
1065 TX_STATUS_FAIL(UNDERRUN);
1066 TX_STATUS_FAIL(DRAIN_FLOW);
1067 TX_STATUS_FAIL(RFKILL_FLUSH);
1068 TX_STATUS_FAIL(LIFE_EXPIRE);
1069 TX_STATUS_FAIL(DEST_PS);
1070 TX_STATUS_FAIL(HOST_ABORTED);
1071 TX_STATUS_FAIL(BT_RETRY);
1072 TX_STATUS_FAIL(STA_INVALID);
1073 TX_STATUS_FAIL(FRAG_DROPPED);
1074 TX_STATUS_FAIL(TID_DISABLE);
1075 TX_STATUS_FAIL(FIFO_FLUSHED);
1076 TX_STATUS_FAIL(SMALL_CF_POLL);
1077 TX_STATUS_FAIL(FW_DROP);
1078 TX_STATUS_FAIL(STA_COLOR_MISMATCH);
1079 }
1080
1081 return "UNKNOWN";
1082
1083 #undef TX_STATUS_FAIL
1084 #undef TX_STATUS_POSTPONE
1085 }
1086 #endif /* CONFIG_IWLWIFI_DEBUG */
1087
1088 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags,
1089 enum nl80211_band band,
1090 struct ieee80211_tx_rate *r)
1091 {
1092 if (rate_n_flags & RATE_HT_MCS_GF_MSK)
1093 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
1094 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
1095 case RATE_MCS_CHAN_WIDTH_20:
1096 break;
1097 case RATE_MCS_CHAN_WIDTH_40:
1098 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
1099 break;
1100 case RATE_MCS_CHAN_WIDTH_80:
1101 r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH;
1102 break;
1103 case RATE_MCS_CHAN_WIDTH_160:
1104 r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH;
1105 break;
1106 }
1107 if (rate_n_flags & RATE_MCS_SGI_MSK)
1108 r->flags |= IEEE80211_TX_RC_SHORT_GI;
1109 if (rate_n_flags & RATE_MCS_HT_MSK) {
1110 r->flags |= IEEE80211_TX_RC_MCS;
1111 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
1112 } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
1113 ieee80211_rate_set_vht(
1114 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK,
1115 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
1116 RATE_VHT_MCS_NSS_POS) + 1);
1117 r->flags |= IEEE80211_TX_RC_VHT_MCS;
1118 } else {
1119 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
1120 band);
1121 }
1122 }
1123
1124 /**
1125 * translate ucode response to mac80211 tx status control values
1126 */
1127 static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags,
1128 struct ieee80211_tx_info *info)
1129 {
1130 struct ieee80211_tx_rate *r = &info->status.rates[0];
1131
1132 info->status.antenna =
1133 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
1134 iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r);
1135 }
1136
1137 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm,
1138 u32 status)
1139 {
1140 struct iwl_fw_dbg_trigger_tlv *trig;
1141 struct iwl_fw_dbg_trigger_tx_status *status_trig;
1142 int i;
1143
1144 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TX_STATUS))
1145 return;
1146
1147 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TX_STATUS);
1148 status_trig = (void *)trig->data;
1149
1150 if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig))
1151 return;
1152
1153 for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) {
1154 /* don't collect on status 0 */
1155 if (!status_trig->statuses[i].status)
1156 break;
1157
1158 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK))
1159 continue;
1160
1161 iwl_mvm_fw_dbg_collect_trig(mvm, trig,
1162 "Tx status %d was received",
1163 status & TX_STATUS_MSK);
1164 break;
1165 }
1166 }
1167
1168 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm,
1169 struct iwl_rx_packet *pkt)
1170 {
1171 struct ieee80211_sta *sta;
1172 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1173 int txq_id = SEQ_TO_QUEUE(sequence);
1174 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1175 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1176 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1177 u32 status = le16_to_cpu(tx_resp->status.status);
1178 u16 ssn = iwl_mvm_get_scd_ssn(tx_resp);
1179 struct iwl_mvm_sta *mvmsta;
1180 struct sk_buff_head skbs;
1181 u8 skb_freed = 0;
1182 u16 next_reclaimed, seq_ctl;
1183 bool is_ndp = false;
1184
1185 __skb_queue_head_init(&skbs);
1186
1187 seq_ctl = le16_to_cpu(tx_resp->seq_ctl);
1188
1189 /* we can free until ssn % q.n_bd not inclusive */
1190 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs);
1191
1192 while (!skb_queue_empty(&skbs)) {
1193 struct sk_buff *skb = __skb_dequeue(&skbs);
1194 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1195
1196 skb_freed++;
1197
1198 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1199
1200 memset(&info->status, 0, sizeof(info->status));
1201
1202 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1203
1204 /* inform mac80211 about what happened with the frame */
1205 switch (status & TX_STATUS_MSK) {
1206 case TX_STATUS_SUCCESS:
1207 case TX_STATUS_DIRECT_DONE:
1208 info->flags |= IEEE80211_TX_STAT_ACK;
1209 break;
1210 case TX_STATUS_FAIL_DEST_PS:
1211 info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
1212 break;
1213 default:
1214 break;
1215 }
1216
1217 iwl_mvm_tx_status_check_trigger(mvm, status);
1218
1219 info->status.rates[0].count = tx_resp->failure_frame + 1;
1220 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate),
1221 info);
1222 info->status.status_driver_data[1] =
1223 (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate);
1224
1225 /* Single frame failure in an AMPDU queue => send BAR */
1226 if (txq_id >= mvm->first_agg_queue &&
1227 !(info->flags & IEEE80211_TX_STAT_ACK) &&
1228 !(info->flags & IEEE80211_TX_STAT_TX_FILTERED))
1229 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1230
1231 /* W/A FW bug: seq_ctl is wrong when the status isn't success */
1232 if (status != TX_STATUS_SUCCESS) {
1233 struct ieee80211_hdr *hdr = (void *)skb->data;
1234 seq_ctl = le16_to_cpu(hdr->seq_ctrl);
1235 }
1236
1237 if (unlikely(!seq_ctl)) {
1238 struct ieee80211_hdr *hdr = (void *)skb->data;
1239
1240 /*
1241 * If it is an NDP, we can't update next_reclaim since
1242 * its sequence control is 0. Note that for that same
1243 * reason, NDPs are never sent to A-MPDU'able queues
1244 * so that we can never have more than one freed frame
1245 * for a single Tx resonse (see WARN_ON below).
1246 */
1247 if (ieee80211_is_qos_nullfunc(hdr->frame_control))
1248 is_ndp = true;
1249 }
1250
1251 /*
1252 * TODO: this is not accurate if we are freeing more than one
1253 * packet.
1254 */
1255 info->status.tx_time =
1256 le16_to_cpu(tx_resp->wireless_media_time);
1257 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1);
1258 info->status.status_driver_data[0] =
1259 (void *)(uintptr_t)tx_resp->reduced_tpc;
1260
1261 ieee80211_tx_status(mvm->hw, skb);
1262 }
1263
1264 if (txq_id >= mvm->first_agg_queue) {
1265 /* If this is an aggregation queue, we use the ssn since:
1266 * ssn = wifi seq_num % 256.
1267 * The seq_ctl is the sequence control of the packet to which
1268 * this Tx response relates. But if there is a hole in the
1269 * bitmap of the BA we received, this Tx response may allow to
1270 * reclaim the hole and all the subsequent packets that were
1271 * already acked. In that case, seq_ctl != ssn, and the next
1272 * packet to be reclaimed will be ssn and not seq_ctl. In that
1273 * case, several packets will be reclaimed even if
1274 * frame_count = 1.
1275 *
1276 * The ssn is the index (% 256) of the latest packet that has
1277 * treated (acked / dropped) + 1.
1278 */
1279 next_reclaimed = ssn;
1280 } else {
1281 /* The next packet to be reclaimed is the one after this one */
1282 next_reclaimed = IEEE80211_SEQ_TO_SN(seq_ctl + 0x10);
1283 }
1284
1285 IWL_DEBUG_TX_REPLY(mvm,
1286 "TXQ %d status %s (0x%08x)\n",
1287 txq_id, iwl_mvm_get_tx_fail_reason(status), status);
1288
1289 IWL_DEBUG_TX_REPLY(mvm,
1290 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
1291 le32_to_cpu(tx_resp->initial_rate),
1292 tx_resp->failure_frame, SEQ_TO_INDEX(sequence),
1293 ssn, next_reclaimed, seq_ctl);
1294
1295 rcu_read_lock();
1296
1297 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1298 /*
1299 * sta can't be NULL otherwise it'd mean that the sta has been freed in
1300 * the firmware while we still have packets for it in the Tx queues.
1301 */
1302 if (WARN_ON_ONCE(!sta))
1303 goto out;
1304
1305 if (!IS_ERR(sta)) {
1306 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1307
1308 if (tid != IWL_TID_NON_QOS) {
1309 struct iwl_mvm_tid_data *tid_data =
1310 &mvmsta->tid_data[tid];
1311 bool send_eosp_ndp = false;
1312
1313 spin_lock_bh(&mvmsta->lock);
1314 if (!is_ndp) {
1315 tid_data->next_reclaimed = next_reclaimed;
1316 IWL_DEBUG_TX_REPLY(mvm,
1317 "Next reclaimed packet:%d\n",
1318 next_reclaimed);
1319 } else {
1320 IWL_DEBUG_TX_REPLY(mvm,
1321 "NDP - don't update next_reclaimed\n");
1322 }
1323
1324 iwl_mvm_check_ratid_empty(mvm, sta, tid);
1325
1326 if (mvmsta->sleep_tx_count) {
1327 mvmsta->sleep_tx_count--;
1328 if (mvmsta->sleep_tx_count &&
1329 !iwl_mvm_tid_queued(tid_data)) {
1330 /*
1331 * The number of frames in the queue
1332 * dropped to 0 even if we sent less
1333 * frames than we thought we had on the
1334 * Tx queue.
1335 * This means we had holes in the BA
1336 * window that we just filled, ask
1337 * mac80211 to send EOSP since the
1338 * firmware won't know how to do that.
1339 * Send NDP and the firmware will send
1340 * EOSP notification that will trigger
1341 * a call to ieee80211_sta_eosp().
1342 */
1343 send_eosp_ndp = true;
1344 }
1345 }
1346
1347 spin_unlock_bh(&mvmsta->lock);
1348 if (send_eosp_ndp) {
1349 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta,
1350 IEEE80211_FRAME_RELEASE_UAPSD,
1351 1, tid, false, false);
1352 mvmsta->sleep_tx_count = 0;
1353 ieee80211_send_eosp_nullfunc(sta, tid);
1354 }
1355 }
1356
1357 if (mvmsta->next_status_eosp) {
1358 mvmsta->next_status_eosp = false;
1359 ieee80211_sta_eosp(sta);
1360 }
1361 } else {
1362 mvmsta = NULL;
1363 }
1364
1365 /*
1366 * If the txq is not an AMPDU queue, there is no chance we freed
1367 * several skbs. Check that out...
1368 */
1369 if (txq_id >= mvm->first_agg_queue)
1370 goto out;
1371
1372 /* We can't free more than one frame at once on a shared queue */
1373 WARN_ON(skb_freed > 1);
1374
1375 /* If we have still frames for this STA nothing to do here */
1376 if (!atomic_sub_and_test(skb_freed, &mvm->pending_frames[sta_id]))
1377 goto out;
1378
1379 if (mvmsta && mvmsta->vif->type == NL80211_IFTYPE_AP) {
1380
1381 /*
1382 * If there are no pending frames for this STA and
1383 * the tx to this station is not disabled, notify
1384 * mac80211 that this station can now wake up in its
1385 * STA table.
1386 * If mvmsta is not NULL, sta is valid.
1387 */
1388
1389 spin_lock_bh(&mvmsta->lock);
1390
1391 if (!mvmsta->disable_tx)
1392 ieee80211_sta_block_awake(mvm->hw, sta, false);
1393
1394 spin_unlock_bh(&mvmsta->lock);
1395 }
1396
1397 if (PTR_ERR(sta) == -EBUSY || PTR_ERR(sta) == -ENOENT) {
1398 /*
1399 * We are draining and this was the last packet - pre_rcu_remove
1400 * has been called already. We might be after the
1401 * synchronize_net already.
1402 * Don't rely on iwl_mvm_rm_sta to see the empty Tx queues.
1403 */
1404 set_bit(sta_id, mvm->sta_drained);
1405 schedule_work(&mvm->sta_drained_wk);
1406 }
1407
1408 out:
1409 rcu_read_unlock();
1410 }
1411
1412 #ifdef CONFIG_IWLWIFI_DEBUG
1413 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
1414 static const char *iwl_get_agg_tx_status(u16 status)
1415 {
1416 switch (status & AGG_TX_STATE_STATUS_MSK) {
1417 AGG_TX_STATE_(TRANSMITTED);
1418 AGG_TX_STATE_(UNDERRUN);
1419 AGG_TX_STATE_(BT_PRIO);
1420 AGG_TX_STATE_(FEW_BYTES);
1421 AGG_TX_STATE_(ABORT);
1422 AGG_TX_STATE_(LAST_SENT_TTL);
1423 AGG_TX_STATE_(LAST_SENT_TRY_CNT);
1424 AGG_TX_STATE_(LAST_SENT_BT_KILL);
1425 AGG_TX_STATE_(SCD_QUERY);
1426 AGG_TX_STATE_(TEST_BAD_CRC32);
1427 AGG_TX_STATE_(RESPONSE);
1428 AGG_TX_STATE_(DUMP_TX);
1429 AGG_TX_STATE_(DELAY_TX);
1430 }
1431
1432 return "UNKNOWN";
1433 }
1434
1435 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1436 struct iwl_rx_packet *pkt)
1437 {
1438 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1439 struct agg_tx_status *frame_status = &tx_resp->status;
1440 int i;
1441
1442 for (i = 0; i < tx_resp->frame_count; i++) {
1443 u16 fstatus = le16_to_cpu(frame_status[i].status);
1444
1445 IWL_DEBUG_TX_REPLY(mvm,
1446 "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
1447 iwl_get_agg_tx_status(fstatus),
1448 fstatus & AGG_TX_STATE_STATUS_MSK,
1449 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >>
1450 AGG_TX_STATE_TRY_CNT_POS,
1451 le16_to_cpu(frame_status[i].sequence));
1452 }
1453 }
1454 #else
1455 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1456 struct iwl_rx_packet *pkt)
1457 {}
1458 #endif /* CONFIG_IWLWIFI_DEBUG */
1459
1460 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm,
1461 struct iwl_rx_packet *pkt)
1462 {
1463 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1464 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1465 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1466 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1467 struct iwl_mvm_sta *mvmsta;
1468
1469 if (WARN_ON_ONCE(SEQ_TO_QUEUE(sequence) < mvm->first_agg_queue))
1470 return;
1471
1472 if (WARN_ON_ONCE(tid == IWL_TID_NON_QOS))
1473 return;
1474
1475 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt);
1476
1477 rcu_read_lock();
1478
1479 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1480
1481 if (!WARN_ON_ONCE(!mvmsta)) {
1482 mvmsta->tid_data[tid].rate_n_flags =
1483 le32_to_cpu(tx_resp->initial_rate);
1484 mvmsta->tid_data[tid].tx_time =
1485 le16_to_cpu(tx_resp->wireless_media_time);
1486 }
1487
1488 rcu_read_unlock();
1489 }
1490
1491 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1492 {
1493 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1494 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1495
1496 if (tx_resp->frame_count == 1)
1497 iwl_mvm_rx_tx_cmd_single(mvm, pkt);
1498 else
1499 iwl_mvm_rx_tx_cmd_agg(mvm, pkt);
1500 }
1501
1502 static void iwl_mvm_tx_info_from_ba_notif(struct ieee80211_tx_info *info,
1503 struct iwl_mvm_ba_notif *ba_notif,
1504 struct iwl_mvm_tid_data *tid_data)
1505 {
1506 info->flags |= IEEE80211_TX_STAT_AMPDU;
1507 info->status.ampdu_ack_len = ba_notif->txed_2_done;
1508 info->status.ampdu_len = ba_notif->txed;
1509 iwl_mvm_hwrate_to_tx_status(tid_data->rate_n_flags,
1510 info);
1511 /* TODO: not accounted if the whole A-MPDU failed */
1512 info->status.tx_time = tid_data->tx_time;
1513 info->status.status_driver_data[0] =
1514 (void *)(uintptr_t)ba_notif->reduced_txp;
1515 info->status.status_driver_data[1] =
1516 (void *)(uintptr_t)tid_data->rate_n_flags;
1517 }
1518
1519 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1520 {
1521 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1522 struct iwl_mvm_ba_notif *ba_notif = (void *)pkt->data;
1523 struct sk_buff_head reclaimed_skbs;
1524 struct iwl_mvm_tid_data *tid_data;
1525 struct ieee80211_sta *sta;
1526 struct iwl_mvm_sta *mvmsta;
1527 struct sk_buff *skb;
1528 int sta_id, tid, freed;
1529 /* "flow" corresponds to Tx queue */
1530 u16 scd_flow = le16_to_cpu(ba_notif->scd_flow);
1531 /* "ssn" is start of block-ack Tx window, corresponds to index
1532 * (in Tx queue's circular buffer) of first TFD/frame in window */
1533 u16 ba_resp_scd_ssn = le16_to_cpu(ba_notif->scd_ssn);
1534
1535 sta_id = ba_notif->sta_id;
1536 tid = ba_notif->tid;
1537
1538 if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT ||
1539 tid >= IWL_MAX_TID_COUNT,
1540 "sta_id %d tid %d", sta_id, tid))
1541 return;
1542
1543 rcu_read_lock();
1544
1545 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1546
1547 /* Reclaiming frames for a station that has been deleted ? */
1548 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
1549 rcu_read_unlock();
1550 return;
1551 }
1552
1553 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1554 tid_data = &mvmsta->tid_data[tid];
1555
1556 if (tid_data->txq_id != scd_flow) {
1557 IWL_ERR(mvm,
1558 "invalid BA notification: Q %d, tid %d, flow %d\n",
1559 tid_data->txq_id, tid, scd_flow);
1560 rcu_read_unlock();
1561 return;
1562 }
1563
1564 spin_lock_bh(&mvmsta->lock);
1565
1566 __skb_queue_head_init(&reclaimed_skbs);
1567
1568 /*
1569 * Release all TFDs before the SSN, i.e. all TFDs in front of
1570 * block-ack window (we assume that they've been successfully
1571 * transmitted ... if not, it's too late anyway).
1572 */
1573 iwl_trans_reclaim(mvm->trans, scd_flow, ba_resp_scd_ssn,
1574 &reclaimed_skbs);
1575
1576 IWL_DEBUG_TX_REPLY(mvm,
1577 "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
1578 (u8 *)&ba_notif->sta_addr_lo32,
1579 ba_notif->sta_id);
1580 IWL_DEBUG_TX_REPLY(mvm,
1581 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
1582 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl),
1583 (unsigned long long)le64_to_cpu(ba_notif->bitmap),
1584 scd_flow, ba_resp_scd_ssn, ba_notif->txed,
1585 ba_notif->txed_2_done);
1586
1587 IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n",
1588 ba_notif->reduced_txp);
1589 tid_data->next_reclaimed = ba_resp_scd_ssn;
1590
1591 iwl_mvm_check_ratid_empty(mvm, sta, tid);
1592
1593 freed = 0;
1594
1595 skb_queue_walk(&reclaimed_skbs, skb) {
1596 struct ieee80211_hdr *hdr = (void *)skb->data;
1597 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1598
1599 if (ieee80211_is_data_qos(hdr->frame_control))
1600 freed++;
1601 else
1602 WARN_ON_ONCE(1);
1603
1604 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1605
1606 memset(&info->status, 0, sizeof(info->status));
1607 /* Packet was transmitted successfully, failures come as single
1608 * frames because before failing a frame the firmware transmits
1609 * it without aggregation at least once.
1610 */
1611 info->flags |= IEEE80211_TX_STAT_ACK;
1612
1613 /* this is the first skb we deliver in this batch */
1614 /* put the rate scaling data there */
1615 if (freed == 1)
1616 iwl_mvm_tx_info_from_ba_notif(info, ba_notif, tid_data);
1617 }
1618
1619 spin_unlock_bh(&mvmsta->lock);
1620
1621 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is
1622 * possible (i.e. first MPDU in the aggregation wasn't acked)
1623 * Still it's important to update RS about sent vs. acked.
1624 */
1625 if (skb_queue_empty(&reclaimed_skbs)) {
1626 struct ieee80211_tx_info ba_info = {};
1627 struct ieee80211_chanctx_conf *chanctx_conf = NULL;
1628
1629 if (mvmsta->vif)
1630 chanctx_conf =
1631 rcu_dereference(mvmsta->vif->chanctx_conf);
1632
1633 if (WARN_ON_ONCE(!chanctx_conf))
1634 goto out;
1635
1636 ba_info.band = chanctx_conf->def.chan->band;
1637 iwl_mvm_tx_info_from_ba_notif(&ba_info, ba_notif, tid_data);
1638
1639 IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n");
1640 iwl_mvm_rs_tx_status(mvm, sta, tid, &ba_info);
1641 }
1642
1643 out:
1644 rcu_read_unlock();
1645
1646 while (!skb_queue_empty(&reclaimed_skbs)) {
1647 skb = __skb_dequeue(&reclaimed_skbs);
1648 ieee80211_tx_status(mvm->hw, skb);
1649 }
1650 }
1651
1652 /*
1653 * Note that there are transports that buffer frames before they reach
1654 * the firmware. This means that after flush_tx_path is called, the
1655 * queue might not be empty. The race-free way to handle this is to:
1656 * 1) set the station as draining
1657 * 2) flush the Tx path
1658 * 3) wait for the transport queues to be empty
1659 */
1660 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, u32 flags)
1661 {
1662 int ret;
1663 struct iwl_tx_path_flush_cmd flush_cmd = {
1664 .queues_ctl = cpu_to_le32(tfd_msk),
1665 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH),
1666 };
1667
1668 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags,
1669 sizeof(flush_cmd), &flush_cmd);
1670 if (ret)
1671 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
1672 return ret;
1673 }
Linux kernel - Deliverables
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