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 - 2017 Intel Deutschland GmbH
11 * Copyright(c) 2018 - 2020 Intel Corporation
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of version 2 of the GNU General Public License as
15 * published by the Free Software Foundation.
16 *
17 * This program is distributed in the hope that it will be useful, but
18 * WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 * General Public License for more details.
21 *
22 * The full GNU General Public License is included in this distribution
23 * in the file called COPYING.
24 *
25 * Contact Information:
26 * Intel Linux Wireless <linuxwifi@intel.com>
27 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
28 *
29 * BSD LICENSE
30 *
31 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
32 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
33 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
34 * Copyright(c) 2018 - 2020 Intel Corporation
35 * All rights reserved.
36 *
37 * Redistribution and use in source and binary forms, with or without
38 * modification, are permitted provided that the following conditions
39 * are met:
40 *
41 * * Redistributions of source code must retain the above copyright
42 * notice, this list of conditions and the following disclaimer.
43 * * Redistributions in binary form must reproduce the above copyright
44 * notice, this list of conditions and the following disclaimer in
45 * the documentation and/or other materials provided with the
46 * distribution.
47 * * Neither the name Intel Corporation nor the names of its
48 * contributors may be used to endorse or promote products derived
49 * from this software without specific prior written permission.
50 *
51 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
52 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
53 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
54 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
55 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
56 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
57 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
58 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
59 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
60 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
61 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
62 *
63 *****************************************************************************/
64 #include <linux/ieee80211.h>
65 #include <linux/etherdevice.h>
66 #include <linux/tcp.h>
67 #include <net/ip.h>
68 #include <net/ipv6.h>
69
70 #include "iwl-trans.h"
71 #include "iwl-eeprom-parse.h"
72 #include "mvm.h"
73 #include "sta.h"
74
75 static void
iwl_mvm_bar_check_trigger(struct iwl_mvm * mvm,const u8 * addr,u16 tid,u16 ssn)76 iwl_mvm_bar_check_trigger(struct iwl_mvm *mvm, const u8 *addr,
77 u16 tid, u16 ssn)
78 {
79 struct iwl_fw_dbg_trigger_tlv *trig;
80 struct iwl_fw_dbg_trigger_ba *ba_trig;
81
82 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, FW_DBG_TRIGGER_BA);
83 if (!trig)
84 return;
85
86 ba_trig = (void *)trig->data;
87
88 if (!(le16_to_cpu(ba_trig->tx_bar) & BIT(tid)))
89 return;
90
91 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
92 "BAR sent to %pM, tid %d, ssn %d",
93 addr, tid, ssn);
94 }
95
96 #define OPT_HDR(type, skb, off) \
97 (type *)(skb_network_header(skb) + (off))
98
iwl_mvm_tx_csum(struct iwl_mvm * mvm,struct sk_buff * skb,struct ieee80211_hdr * hdr,struct ieee80211_tx_info * info,u16 offload_assist)99 static u16 iwl_mvm_tx_csum(struct iwl_mvm *mvm, struct sk_buff *skb,
100 struct ieee80211_hdr *hdr,
101 struct ieee80211_tx_info *info,
102 u16 offload_assist)
103 {
104 #if IS_ENABLED(CONFIG_INET)
105 u16 mh_len = ieee80211_hdrlen(hdr->frame_control);
106 u8 protocol = 0;
107
108 /*
109 * Do not compute checksum if already computed or if transport will
110 * compute it
111 */
112 if (skb->ip_summed != CHECKSUM_PARTIAL || IWL_MVM_SW_TX_CSUM_OFFLOAD)
113 goto out;
114
115 /* We do not expect to be requested to csum stuff we do not support */
116 if (WARN_ONCE(!(mvm->hw->netdev_features & IWL_TX_CSUM_NETIF_FLAGS) ||
117 (skb->protocol != htons(ETH_P_IP) &&
118 skb->protocol != htons(ETH_P_IPV6)),
119 "No support for requested checksum\n")) {
120 skb_checksum_help(skb);
121 goto out;
122 }
123
124 if (skb->protocol == htons(ETH_P_IP)) {
125 protocol = ip_hdr(skb)->protocol;
126 } else {
127 #if IS_ENABLED(CONFIG_IPV6)
128 struct ipv6hdr *ipv6h =
129 (struct ipv6hdr *)skb_network_header(skb);
130 unsigned int off = sizeof(*ipv6h);
131
132 protocol = ipv6h->nexthdr;
133 while (protocol != NEXTHDR_NONE && ipv6_ext_hdr(protocol)) {
134 struct ipv6_opt_hdr *hp;
135
136 /* only supported extension headers */
137 if (protocol != NEXTHDR_ROUTING &&
138 protocol != NEXTHDR_HOP &&
139 protocol != NEXTHDR_DEST) {
140 skb_checksum_help(skb);
141 goto out;
142 }
143
144 hp = OPT_HDR(struct ipv6_opt_hdr, skb, off);
145 protocol = hp->nexthdr;
146 off += ipv6_optlen(hp);
147 }
148 /* if we get here - protocol now should be TCP/UDP */
149 #endif
150 }
151
152 if (protocol != IPPROTO_TCP && protocol != IPPROTO_UDP) {
153 WARN_ON_ONCE(1);
154 skb_checksum_help(skb);
155 goto out;
156 }
157
158 /* enable L4 csum */
159 offload_assist |= BIT(TX_CMD_OFFLD_L4_EN);
160
161 /*
162 * Set offset to IP header (snap).
163 * We don't support tunneling so no need to take care of inner header.
164 * Size is in words.
165 */
166 offload_assist |= (4 << TX_CMD_OFFLD_IP_HDR);
167
168 /* Do IPv4 csum for AMSDU only (no IP csum for Ipv6) */
169 if (skb->protocol == htons(ETH_P_IP) &&
170 (offload_assist & BIT(TX_CMD_OFFLD_AMSDU))) {
171 ip_hdr(skb)->check = 0;
172 offload_assist |= BIT(TX_CMD_OFFLD_L3_EN);
173 }
174
175 /* reset UDP/TCP header csum */
176 if (protocol == IPPROTO_TCP)
177 tcp_hdr(skb)->check = 0;
178 else
179 udp_hdr(skb)->check = 0;
180
181 /*
182 * mac header len should include IV, size is in words unless
183 * the IV is added by the firmware like in WEP.
184 * In new Tx API, the IV is always added by the firmware.
185 */
186 if (!iwl_mvm_has_new_tx_api(mvm) && info->control.hw_key &&
187 info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP40 &&
188 info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP104)
189 mh_len += info->control.hw_key->iv_len;
190 mh_len /= 2;
191 offload_assist |= mh_len << TX_CMD_OFFLD_MH_SIZE;
192
193 out:
194 #endif
195 return offload_assist;
196 }
197
198 /*
199 * Sets most of the Tx cmd's fields
200 */
iwl_mvm_set_tx_cmd(struct iwl_mvm * mvm,struct sk_buff * skb,struct iwl_tx_cmd * tx_cmd,struct ieee80211_tx_info * info,u8 sta_id)201 void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb,
202 struct iwl_tx_cmd *tx_cmd,
203 struct ieee80211_tx_info *info, u8 sta_id)
204 {
205 struct ieee80211_hdr *hdr = (void *)skb->data;
206 __le16 fc = hdr->frame_control;
207 u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags);
208 u32 len = skb->len + FCS_LEN;
209 u16 offload_assist = 0;
210 u8 ac;
211
212 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) ||
213 (ieee80211_is_probe_resp(fc) &&
214 !is_multicast_ether_addr(hdr->addr1)))
215 tx_flags |= TX_CMD_FLG_ACK;
216 else
217 tx_flags &= ~TX_CMD_FLG_ACK;
218
219 if (ieee80211_is_probe_resp(fc))
220 tx_flags |= TX_CMD_FLG_TSF;
221
222 if (ieee80211_has_morefrags(fc))
223 tx_flags |= TX_CMD_FLG_MORE_FRAG;
224
225 if (ieee80211_is_data_qos(fc)) {
226 u8 *qc = ieee80211_get_qos_ctl(hdr);
227 tx_cmd->tid_tspec = qc[0] & 0xf;
228 tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
229 if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT)
230 offload_assist |= BIT(TX_CMD_OFFLD_AMSDU);
231 } else if (ieee80211_is_back_req(fc)) {
232 struct ieee80211_bar *bar = (void *)skb->data;
233 u16 control = le16_to_cpu(bar->control);
234 u16 ssn = le16_to_cpu(bar->start_seq_num);
235
236 tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR;
237 tx_cmd->tid_tspec = (control &
238 IEEE80211_BAR_CTRL_TID_INFO_MASK) >>
239 IEEE80211_BAR_CTRL_TID_INFO_SHIFT;
240 WARN_ON_ONCE(tx_cmd->tid_tspec >= IWL_MAX_TID_COUNT);
241 iwl_mvm_bar_check_trigger(mvm, bar->ra, tx_cmd->tid_tspec,
242 ssn);
243 } else {
244 if (ieee80211_is_data(fc))
245 tx_cmd->tid_tspec = IWL_TID_NON_QOS;
246 else
247 tx_cmd->tid_tspec = IWL_MAX_TID_COUNT;
248
249 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
250 tx_flags |= TX_CMD_FLG_SEQ_CTL;
251 else
252 tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
253 }
254
255 /* Default to 0 (BE) when tid_spec is set to IWL_MAX_TID_COUNT */
256 if (tx_cmd->tid_tspec < IWL_MAX_TID_COUNT)
257 ac = tid_to_mac80211_ac[tx_cmd->tid_tspec];
258 else
259 ac = tid_to_mac80211_ac[0];
260
261 tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) <<
262 TX_CMD_FLG_BT_PRIO_POS;
263
264 if (ieee80211_is_mgmt(fc)) {
265 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
266 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_ASSOC);
267 else if (ieee80211_is_action(fc))
268 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
269 else
270 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
271
272 /* The spec allows Action frames in A-MPDU, we don't support
273 * it
274 */
275 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU);
276 } else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) {
277 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
278 } else {
279 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
280 }
281
282 if (ieee80211_is_data(fc) && len > mvm->rts_threshold &&
283 !is_multicast_ether_addr(hdr->addr1))
284 tx_flags |= TX_CMD_FLG_PROT_REQUIRE;
285
286 if (fw_has_capa(&mvm->fw->ucode_capa,
287 IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT) &&
288 ieee80211_action_contains_tpc(skb))
289 tx_flags |= TX_CMD_FLG_WRITE_TX_POWER;
290
291 tx_cmd->tx_flags = cpu_to_le32(tx_flags);
292 /* Total # bytes to be transmitted - PCIe code will adjust for A-MSDU */
293 tx_cmd->len = cpu_to_le16((u16)skb->len);
294 tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
295 tx_cmd->sta_id = sta_id;
296
297 /* padding is inserted later in transport */
298 if (ieee80211_hdrlen(fc) % 4 &&
299 !(offload_assist & BIT(TX_CMD_OFFLD_AMSDU)))
300 offload_assist |= BIT(TX_CMD_OFFLD_PAD);
301
302 tx_cmd->offload_assist |=
303 cpu_to_le16(iwl_mvm_tx_csum(mvm, skb, hdr, info,
304 offload_assist));
305 }
306
iwl_mvm_get_tx_ant(struct iwl_mvm * mvm,struct ieee80211_tx_info * info,struct ieee80211_sta * sta,__le16 fc)307 static u32 iwl_mvm_get_tx_ant(struct iwl_mvm *mvm,
308 struct ieee80211_tx_info *info,
309 struct ieee80211_sta *sta, __le16 fc)
310 {
311 if (info->band == NL80211_BAND_2GHZ &&
312 !iwl_mvm_bt_coex_is_shared_ant_avail(mvm))
313 return mvm->cfg->non_shared_ant << RATE_MCS_ANT_POS;
314
315 if (sta && ieee80211_is_data(fc)) {
316 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
317
318 return BIT(mvmsta->tx_ant) << RATE_MCS_ANT_POS;
319 }
320
321 return BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS;
322 }
323
iwl_mvm_get_tx_rate(struct iwl_mvm * mvm,struct ieee80211_tx_info * info,struct ieee80211_sta * sta)324 static u32 iwl_mvm_get_tx_rate(struct iwl_mvm *mvm,
325 struct ieee80211_tx_info *info,
326 struct ieee80211_sta *sta)
327 {
328 int rate_idx;
329 u8 rate_plcp;
330 u32 rate_flags = 0;
331
332 /* HT rate doesn't make sense for a non data frame */
333 WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS,
334 "Got an HT rate (flags:0x%x/mcs:%d) for a non data frame\n",
335 info->control.rates[0].flags,
336 info->control.rates[0].idx);
337
338 rate_idx = info->control.rates[0].idx;
339 /* if the rate isn't a well known legacy rate, take the lowest one */
340 if (rate_idx < 0 || rate_idx >= IWL_RATE_COUNT_LEGACY)
341 rate_idx = rate_lowest_index(
342 &mvm->nvm_data->bands[info->band], sta);
343
344 /*
345 * For non 2 GHZ band, remap mac80211 rate
346 * indices into driver indices
347 */
348 if (info->band != NL80211_BAND_2GHZ)
349 rate_idx += IWL_FIRST_OFDM_RATE;
350
351 /* For 2.4 GHZ band, check that there is no need to remap */
352 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
353
354 /* Get PLCP rate for tx_cmd->rate_n_flags */
355 rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(rate_idx);
356
357 /* Set CCK flag as needed */
358 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
359 rate_flags |= RATE_MCS_CCK_MSK;
360
361 return (u32)rate_plcp | rate_flags;
362 }
363
iwl_mvm_get_tx_rate_n_flags(struct iwl_mvm * mvm,struct ieee80211_tx_info * info,struct ieee80211_sta * sta,__le16 fc)364 static u32 iwl_mvm_get_tx_rate_n_flags(struct iwl_mvm *mvm,
365 struct ieee80211_tx_info *info,
366 struct ieee80211_sta *sta, __le16 fc)
367 {
368 return iwl_mvm_get_tx_rate(mvm, info, sta) |
369 iwl_mvm_get_tx_ant(mvm, info, sta, fc);
370 }
371
372 /*
373 * Sets the fields in the Tx cmd that are rate related
374 */
iwl_mvm_set_tx_cmd_rate(struct iwl_mvm * mvm,struct iwl_tx_cmd * tx_cmd,struct ieee80211_tx_info * info,struct ieee80211_sta * sta,__le16 fc)375 void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd,
376 struct ieee80211_tx_info *info,
377 struct ieee80211_sta *sta, __le16 fc)
378 {
379 /* Set retry limit on RTS packets */
380 tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT;
381
382 /* Set retry limit on DATA packets and Probe Responses*/
383 if (ieee80211_is_probe_resp(fc)) {
384 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT;
385 tx_cmd->rts_retry_limit =
386 min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit);
387 } else if (ieee80211_is_back_req(fc)) {
388 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT;
389 } else {
390 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY;
391 }
392
393 /*
394 * for data packets, rate info comes from the table inside the fw. This
395 * table is controlled by LINK_QUALITY commands
396 */
397
398 if (ieee80211_is_data(fc) && sta) {
399 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
400
401 if (mvmsta->sta_state >= IEEE80211_STA_AUTHORIZED) {
402 tx_cmd->initial_rate_index = 0;
403 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE);
404 return;
405 }
406 } else if (ieee80211_is_back_req(fc)) {
407 tx_cmd->tx_flags |=
408 cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR);
409 }
410
411 /* Set the rate in the TX cmd */
412 tx_cmd->rate_n_flags =
413 cpu_to_le32(iwl_mvm_get_tx_rate_n_flags(mvm, info, sta, fc));
414 }
415
iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info * info,u8 * crypto_hdr)416 static inline void iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info *info,
417 u8 *crypto_hdr)
418 {
419 struct ieee80211_key_conf *keyconf = info->control.hw_key;
420 u64 pn;
421
422 pn = atomic64_inc_return(&keyconf->tx_pn);
423 crypto_hdr[0] = pn;
424 crypto_hdr[2] = 0;
425 crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6);
426 crypto_hdr[1] = pn >> 8;
427 crypto_hdr[4] = pn >> 16;
428 crypto_hdr[5] = pn >> 24;
429 crypto_hdr[6] = pn >> 32;
430 crypto_hdr[7] = pn >> 40;
431 }
432
433 /*
434 * Sets the fields in the Tx cmd that are crypto related
435 */
iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm * mvm,struct ieee80211_tx_info * info,struct iwl_tx_cmd * tx_cmd,struct sk_buff * skb_frag,int hdrlen)436 static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm,
437 struct ieee80211_tx_info *info,
438 struct iwl_tx_cmd *tx_cmd,
439 struct sk_buff *skb_frag,
440 int hdrlen)
441 {
442 struct ieee80211_key_conf *keyconf = info->control.hw_key;
443 u8 *crypto_hdr = skb_frag->data + hdrlen;
444 enum iwl_tx_cmd_sec_ctrl type = TX_CMD_SEC_CCM;
445 u64 pn;
446
447 switch (keyconf->cipher) {
448 case WLAN_CIPHER_SUITE_CCMP:
449 iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd);
450 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr);
451 break;
452
453 case WLAN_CIPHER_SUITE_TKIP:
454 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
455 pn = atomic64_inc_return(&keyconf->tx_pn);
456 ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn);
457 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
458 break;
459
460 case WLAN_CIPHER_SUITE_WEP104:
461 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
462 /* fall through */
463 case WLAN_CIPHER_SUITE_WEP40:
464 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP |
465 ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) &
466 TX_CMD_SEC_WEP_KEY_IDX_MSK);
467
468 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
469 break;
470 case WLAN_CIPHER_SUITE_GCMP:
471 case WLAN_CIPHER_SUITE_GCMP_256:
472 type = TX_CMD_SEC_GCMP;
473 /* Fall through */
474 case WLAN_CIPHER_SUITE_CCMP_256:
475 /* TODO: Taking the key from the table might introduce a race
476 * when PTK rekeying is done, having an old packets with a PN
477 * based on the old key but the message encrypted with a new
478 * one.
479 * Need to handle this.
480 */
481 tx_cmd->sec_ctl |= type | TX_CMD_SEC_KEY_FROM_TABLE;
482 tx_cmd->key[0] = keyconf->hw_key_idx;
483 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr);
484 break;
485 default:
486 tx_cmd->sec_ctl |= TX_CMD_SEC_EXT;
487 }
488 }
489
490 /*
491 * Allocates and sets the Tx cmd the driver data pointers in the skb
492 */
493 static struct iwl_device_tx_cmd *
iwl_mvm_set_tx_params(struct iwl_mvm * mvm,struct sk_buff * skb,struct ieee80211_tx_info * info,int hdrlen,struct ieee80211_sta * sta,u8 sta_id)494 iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb,
495 struct ieee80211_tx_info *info, int hdrlen,
496 struct ieee80211_sta *sta, u8 sta_id)
497 {
498 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
499 struct iwl_device_tx_cmd *dev_cmd;
500 struct iwl_tx_cmd *tx_cmd;
501
502 dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans);
503
504 if (unlikely(!dev_cmd))
505 return NULL;
506
507 dev_cmd->hdr.cmd = TX_CMD;
508
509 if (iwl_mvm_has_new_tx_api(mvm)) {
510 u16 offload_assist = 0;
511 u32 rate_n_flags = 0;
512 u16 flags = 0;
513 struct iwl_mvm_sta *mvmsta = sta ?
514 iwl_mvm_sta_from_mac80211(sta) : NULL;
515
516 if (ieee80211_is_data_qos(hdr->frame_control)) {
517 u8 *qc = ieee80211_get_qos_ctl(hdr);
518
519 if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT)
520 offload_assist |= BIT(TX_CMD_OFFLD_AMSDU);
521 }
522
523 offload_assist = iwl_mvm_tx_csum(mvm, skb, hdr, info,
524 offload_assist);
525
526 /* padding is inserted later in transport */
527 if (ieee80211_hdrlen(hdr->frame_control) % 4 &&
528 !(offload_assist & BIT(TX_CMD_OFFLD_AMSDU)))
529 offload_assist |= BIT(TX_CMD_OFFLD_PAD);
530
531 if (!info->control.hw_key)
532 flags |= IWL_TX_FLAGS_ENCRYPT_DIS;
533
534 /*
535 * For data and mgmt packets rate info comes from the fw. Only
536 * set rate/antenna for injected frames with fixed rate, or
537 * when no sta is given.
538 */
539 if (unlikely(!sta ||
540 info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT)) {
541 flags |= IWL_TX_FLAGS_CMD_RATE;
542 rate_n_flags =
543 iwl_mvm_get_tx_rate_n_flags(mvm, info, sta,
544 hdr->frame_control);
545 } else if (!ieee80211_is_data(hdr->frame_control) ||
546 mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) {
547 /* These are important frames */
548 flags |= IWL_TX_FLAGS_HIGH_PRI;
549 }
550
551 if (mvm->trans->trans_cfg->device_family >=
552 IWL_DEVICE_FAMILY_AX210) {
553 struct iwl_tx_cmd_gen3 *cmd = (void *)dev_cmd->payload;
554
555 cmd->offload_assist |= cpu_to_le32(offload_assist);
556
557 /* Total # bytes to be transmitted */
558 cmd->len = cpu_to_le16((u16)skb->len);
559
560 /* Copy MAC header from skb into command buffer */
561 memcpy(cmd->hdr, hdr, hdrlen);
562
563 cmd->flags = cpu_to_le16(flags);
564 cmd->rate_n_flags = cpu_to_le32(rate_n_flags);
565 } else {
566 struct iwl_tx_cmd_gen2 *cmd = (void *)dev_cmd->payload;
567
568 cmd->offload_assist |= cpu_to_le16(offload_assist);
569
570 /* Total # bytes to be transmitted */
571 cmd->len = cpu_to_le16((u16)skb->len);
572
573 /* Copy MAC header from skb into command buffer */
574 memcpy(cmd->hdr, hdr, hdrlen);
575
576 cmd->flags = cpu_to_le32(flags);
577 cmd->rate_n_flags = cpu_to_le32(rate_n_flags);
578 }
579 goto out;
580 }
581
582 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
583
584 if (info->control.hw_key)
585 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen);
586
587 iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id);
588
589 iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control);
590
591 /* Copy MAC header from skb into command buffer */
592 memcpy(tx_cmd->hdr, hdr, hdrlen);
593
594 out:
595 return dev_cmd;
596 }
597
iwl_mvm_skb_prepare_status(struct sk_buff * skb,struct iwl_device_tx_cmd * cmd)598 static void iwl_mvm_skb_prepare_status(struct sk_buff *skb,
599 struct iwl_device_tx_cmd *cmd)
600 {
601 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb);
602
603 memset(&skb_info->status, 0, sizeof(skb_info->status));
604 memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data));
605
606 skb_info->driver_data[1] = cmd;
607 }
608
iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm * mvm,struct ieee80211_tx_info * info,struct ieee80211_hdr * hdr)609 static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm,
610 struct ieee80211_tx_info *info,
611 struct ieee80211_hdr *hdr)
612 {
613 struct iwl_mvm_vif *mvmvif =
614 iwl_mvm_vif_from_mac80211(info->control.vif);
615 __le16 fc = hdr->frame_control;
616
617 switch (info->control.vif->type) {
618 case NL80211_IFTYPE_AP:
619 case NL80211_IFTYPE_ADHOC:
620 /*
621 * Non-bufferable frames use the broadcast station, thus they
622 * use the probe queue.
623 * Also take care of the case where we send a deauth to a
624 * station that we don't have, or similarly an association
625 * response (with non-success status) for a station we can't
626 * accept.
627 * Also, disassociate frames might happen, particular with
628 * reason 7 ("Class 3 frame received from nonassociated STA").
629 */
630 if (ieee80211_is_mgmt(fc) &&
631 (!ieee80211_is_bufferable_mmpdu(fc) ||
632 ieee80211_is_deauth(fc) || ieee80211_is_disassoc(fc)))
633 return mvm->probe_queue;
634
635 if (!ieee80211_has_order(fc) && !ieee80211_is_probe_req(fc) &&
636 is_multicast_ether_addr(hdr->addr1))
637 return mvmvif->cab_queue;
638
639 WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC,
640 "fc=0x%02x", le16_to_cpu(fc));
641 return mvm->probe_queue;
642 case NL80211_IFTYPE_P2P_DEVICE:
643 if (ieee80211_is_mgmt(fc))
644 return mvm->p2p_dev_queue;
645
646 WARN_ON_ONCE(1);
647 return mvm->p2p_dev_queue;
648 default:
649 WARN_ONCE(1, "Not a ctrl vif, no available queue\n");
650 return -1;
651 }
652 }
653
iwl_mvm_probe_resp_set_noa(struct iwl_mvm * mvm,struct sk_buff * skb)654 static void iwl_mvm_probe_resp_set_noa(struct iwl_mvm *mvm,
655 struct sk_buff *skb)
656 {
657 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
658 struct iwl_mvm_vif *mvmvif =
659 iwl_mvm_vif_from_mac80211(info->control.vif);
660 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
661 int base_len = (u8 *)mgmt->u.probe_resp.variable - (u8 *)mgmt;
662 struct iwl_probe_resp_data *resp_data;
663 u8 *ie, *pos;
664 u8 match[] = {
665 (WLAN_OUI_WFA >> 16) & 0xff,
666 (WLAN_OUI_WFA >> 8) & 0xff,
667 WLAN_OUI_WFA & 0xff,
668 WLAN_OUI_TYPE_WFA_P2P,
669 };
670
671 rcu_read_lock();
672
673 resp_data = rcu_dereference(mvmvif->probe_resp_data);
674 if (!resp_data)
675 goto out;
676
677 if (!resp_data->notif.noa_active)
678 goto out;
679
680 ie = (u8 *)cfg80211_find_ie_match(WLAN_EID_VENDOR_SPECIFIC,
681 mgmt->u.probe_resp.variable,
682 skb->len - base_len,
683 match, 4, 2);
684 if (!ie) {
685 IWL_DEBUG_TX(mvm, "probe resp doesn't have P2P IE\n");
686 goto out;
687 }
688
689 if (skb_tailroom(skb) < resp_data->noa_len) {
690 if (pskb_expand_head(skb, 0, resp_data->noa_len, GFP_ATOMIC)) {
691 IWL_ERR(mvm,
692 "Failed to reallocate probe resp\n");
693 goto out;
694 }
695 }
696
697 pos = skb_put(skb, resp_data->noa_len);
698
699 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
700 /* Set length of IE body (not including ID and length itself) */
701 *pos++ = resp_data->noa_len - 2;
702 *pos++ = (WLAN_OUI_WFA >> 16) & 0xff;
703 *pos++ = (WLAN_OUI_WFA >> 8) & 0xff;
704 *pos++ = WLAN_OUI_WFA & 0xff;
705 *pos++ = WLAN_OUI_TYPE_WFA_P2P;
706
707 memcpy(pos, &resp_data->notif.noa_attr,
708 resp_data->noa_len - sizeof(struct ieee80211_vendor_ie));
709
710 out:
711 rcu_read_unlock();
712 }
713
iwl_mvm_tx_skb_non_sta(struct iwl_mvm * mvm,struct sk_buff * skb)714 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb)
715 {
716 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
717 struct ieee80211_tx_info info;
718 struct iwl_device_tx_cmd *dev_cmd;
719 u8 sta_id;
720 int hdrlen = ieee80211_hdrlen(hdr->frame_control);
721 __le16 fc = hdr->frame_control;
722 bool offchannel = IEEE80211_SKB_CB(skb)->flags &
723 IEEE80211_TX_CTL_TX_OFFCHAN;
724 int queue = -1;
725
726 if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc))
727 return -1;
728
729 memcpy(&info, skb->cb, sizeof(info));
730
731 if (WARN_ON_ONCE(skb->len > IEEE80211_MAX_DATA_LEN + hdrlen))
732 return -1;
733
734 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU))
735 return -1;
736
737 if (info.control.vif) {
738 struct iwl_mvm_vif *mvmvif =
739 iwl_mvm_vif_from_mac80211(info.control.vif);
740
741 if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE ||
742 info.control.vif->type == NL80211_IFTYPE_AP ||
743 info.control.vif->type == NL80211_IFTYPE_ADHOC) {
744 if (!ieee80211_is_data(hdr->frame_control))
745 sta_id = mvmvif->bcast_sta.sta_id;
746 else
747 sta_id = mvmvif->mcast_sta.sta_id;
748
749 queue = iwl_mvm_get_ctrl_vif_queue(mvm, &info, hdr);
750 } else if (info.control.vif->type == NL80211_IFTYPE_MONITOR) {
751 queue = mvm->snif_queue;
752 sta_id = mvm->snif_sta.sta_id;
753 } else if (info.control.vif->type == NL80211_IFTYPE_STATION &&
754 offchannel) {
755 /*
756 * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets
757 * that can be used in 2 different types of vifs, P2P &
758 * STATION.
759 * P2P uses the offchannel queue.
760 * STATION (HS2.0) uses the auxiliary context of the FW,
761 * and hence needs to be sent on the aux queue.
762 */
763 sta_id = mvm->aux_sta.sta_id;
764 queue = mvm->aux_queue;
765 }
766 }
767
768 if (queue < 0) {
769 IWL_ERR(mvm, "No queue was found. Dropping TX\n");
770 return -1;
771 }
772
773 if (unlikely(ieee80211_is_probe_resp(fc)))
774 iwl_mvm_probe_resp_set_noa(mvm, skb);
775
776 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue);
777
778 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id);
779 if (!dev_cmd)
780 return -1;
781
782 /* From now on, we cannot access info->control */
783 iwl_mvm_skb_prepare_status(skb, dev_cmd);
784
785 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) {
786 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
787 return -1;
788 }
789
790 return 0;
791 }
792
iwl_mvm_max_amsdu_size(struct iwl_mvm * mvm,struct ieee80211_sta * sta,unsigned int tid)793 unsigned int iwl_mvm_max_amsdu_size(struct iwl_mvm *mvm,
794 struct ieee80211_sta *sta, unsigned int tid)
795 {
796 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
797 enum nl80211_band band = mvmsta->vif->bss_conf.chandef.chan->band;
798 u8 ac = tid_to_mac80211_ac[tid];
799 unsigned int txf;
800 int lmac = iwl_mvm_get_lmac_id(mvm->fw, band);
801
802 /* For HE redirect to trigger based fifos */
803 if (sta->he_cap.has_he && !WARN_ON(!iwl_mvm_has_new_tx_api(mvm)))
804 ac += 4;
805
806 txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac);
807
808 /*
809 * Don't send an AMSDU that will be longer than the TXF.
810 * Add a security margin of 256 for the TX command + headers.
811 * We also want to have the start of the next packet inside the
812 * fifo to be able to send bursts.
813 */
814 return min_t(unsigned int, mvmsta->max_amsdu_len,
815 mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256);
816 }
817
818 #ifdef CONFIG_INET
819
820 static int
iwl_mvm_tx_tso_segment(struct sk_buff * skb,unsigned int num_subframes,netdev_features_t netdev_flags,struct sk_buff_head * mpdus_skb)821 iwl_mvm_tx_tso_segment(struct sk_buff *skb, unsigned int num_subframes,
822 netdev_features_t netdev_flags,
823 struct sk_buff_head *mpdus_skb)
824 {
825 struct sk_buff *tmp, *next;
826 struct ieee80211_hdr *hdr = (void *)skb->data;
827 char cb[sizeof(skb->cb)];
828 u16 i = 0;
829 unsigned int tcp_payload_len;
830 unsigned int mss = skb_shinfo(skb)->gso_size;
831 bool ipv4 = (skb->protocol == htons(ETH_P_IP));
832 bool qos = ieee80211_is_data_qos(hdr->frame_control);
833 u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0;
834
835 skb_shinfo(skb)->gso_size = num_subframes * mss;
836 memcpy(cb, skb->cb, sizeof(cb));
837
838 next = skb_gso_segment(skb, netdev_flags);
839 skb_shinfo(skb)->gso_size = mss;
840 skb_shinfo(skb)->gso_type = ipv4 ? SKB_GSO_TCPV4 : SKB_GSO_TCPV6;
841 if (WARN_ON_ONCE(IS_ERR(next)))
842 return -EINVAL;
843 else if (next)
844 consume_skb(skb);
845
846 skb_list_walk_safe(next, tmp, next) {
847 memcpy(tmp->cb, cb, sizeof(tmp->cb));
848 /*
849 * Compute the length of all the data added for the A-MSDU.
850 * This will be used to compute the length to write in the TX
851 * command. We have: SNAP + IP + TCP for n -1 subframes and
852 * ETH header for n subframes.
853 */
854 tcp_payload_len = skb_tail_pointer(tmp) -
855 skb_transport_header(tmp) -
856 tcp_hdrlen(tmp) + tmp->data_len;
857
858 if (ipv4)
859 ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes);
860
861 if (tcp_payload_len > mss) {
862 skb_shinfo(tmp)->gso_size = mss;
863 skb_shinfo(tmp)->gso_type = ipv4 ? SKB_GSO_TCPV4 :
864 SKB_GSO_TCPV6;
865 } else {
866 if (qos) {
867 u8 *qc;
868
869 if (ipv4)
870 ip_send_check(ip_hdr(tmp));
871
872 qc = ieee80211_get_qos_ctl((void *)tmp->data);
873 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
874 }
875 skb_shinfo(tmp)->gso_size = 0;
876 }
877
878 skb_mark_not_on_list(tmp);
879 __skb_queue_tail(mpdus_skb, tmp);
880 i++;
881 }
882
883 return 0;
884 }
885
iwl_mvm_tx_tso(struct iwl_mvm * mvm,struct sk_buff * skb,struct ieee80211_tx_info * info,struct ieee80211_sta * sta,struct sk_buff_head * mpdus_skb)886 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
887 struct ieee80211_tx_info *info,
888 struct ieee80211_sta *sta,
889 struct sk_buff_head *mpdus_skb)
890 {
891 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
892 struct ieee80211_hdr *hdr = (void *)skb->data;
893 unsigned int mss = skb_shinfo(skb)->gso_size;
894 unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len;
895 u16 snap_ip_tcp, pad;
896 netdev_features_t netdev_flags = NETIF_F_CSUM_MASK | NETIF_F_SG;
897 u8 tid;
898
899 snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) +
900 tcp_hdrlen(skb);
901
902 if (!mvmsta->max_amsdu_len ||
903 !ieee80211_is_data_qos(hdr->frame_control) ||
904 !mvmsta->amsdu_enabled)
905 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
906
907 /*
908 * Do not build AMSDU for IPv6 with extension headers.
909 * ask stack to segment and checkum the generated MPDUs for us.
910 */
911 if (skb->protocol == htons(ETH_P_IPV6) &&
912 ((struct ipv6hdr *)skb_network_header(skb))->nexthdr !=
913 IPPROTO_TCP) {
914 netdev_flags &= ~NETIF_F_CSUM_MASK;
915 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
916 }
917
918 tid = ieee80211_get_tid(hdr);
919 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
920 return -EINVAL;
921
922 /*
923 * No need to lock amsdu_in_ampdu_allowed since it can't be modified
924 * during an BA session.
925 */
926 if ((info->flags & IEEE80211_TX_CTL_AMPDU &&
927 !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) ||
928 !(mvmsta->amsdu_enabled & BIT(tid)))
929 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
930
931 /*
932 * Take the min of ieee80211 station and mvm station
933 */
934 max_amsdu_len =
935 min_t(unsigned int, sta->max_amsdu_len,
936 iwl_mvm_max_amsdu_size(mvm, sta, tid));
937
938 /*
939 * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not
940 * supported. This is a spec requirement (IEEE 802.11-2015
941 * section 8.7.3 NOTE 3).
942 */
943 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
944 !sta->vht_cap.vht_supported)
945 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095);
946
947 /* Sub frame header + SNAP + IP header + TCP header + MSS */
948 subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss;
949 pad = (4 - subf_len) & 0x3;
950
951 /*
952 * If we have N subframes in the A-MSDU, then the A-MSDU's size is
953 * N * subf_len + (N - 1) * pad.
954 */
955 num_subframes = (max_amsdu_len + pad) / (subf_len + pad);
956
957 if (sta->max_amsdu_subframes &&
958 num_subframes > sta->max_amsdu_subframes)
959 num_subframes = sta->max_amsdu_subframes;
960
961 tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
962 tcp_hdrlen(skb) + skb->data_len;
963
964 /*
965 * Make sure we have enough TBs for the A-MSDU:
966 * 2 for each subframe
967 * 1 more for each fragment
968 * 1 more for the potential data in the header
969 */
970 if ((num_subframes * 2 + skb_shinfo(skb)->nr_frags + 1) >
971 mvm->trans->max_skb_frags)
972 num_subframes = 1;
973
974 if (num_subframes > 1)
975 *ieee80211_get_qos_ctl(hdr) |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
976
977 /* This skb fits in one single A-MSDU */
978 if (num_subframes * mss >= tcp_payload_len) {
979 __skb_queue_tail(mpdus_skb, skb);
980 return 0;
981 }
982
983 /*
984 * Trick the segmentation function to make it
985 * create SKBs that can fit into one A-MSDU.
986 */
987 return iwl_mvm_tx_tso_segment(skb, num_subframes, netdev_flags,
988 mpdus_skb);
989 }
990 #else /* CONFIG_INET */
iwl_mvm_tx_tso(struct iwl_mvm * mvm,struct sk_buff * skb,struct ieee80211_tx_info * info,struct ieee80211_sta * sta,struct sk_buff_head * mpdus_skb)991 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
992 struct ieee80211_tx_info *info,
993 struct ieee80211_sta *sta,
994 struct sk_buff_head *mpdus_skb)
995 {
996 /* Impossible to get TSO with CONFIG_INET */
997 WARN_ON(1);
998
999 return -1;
1000 }
1001 #endif
1002
1003 /* Check if there are any timed-out TIDs on a given shared TXQ */
iwl_mvm_txq_should_update(struct iwl_mvm * mvm,int txq_id)1004 static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id)
1005 {
1006 unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap;
1007 unsigned long now = jiffies;
1008 int tid;
1009
1010 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1011 return false;
1012
1013 for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) {
1014 if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] +
1015 IWL_MVM_DQA_QUEUE_TIMEOUT, now))
1016 return true;
1017 }
1018
1019 return false;
1020 }
1021
iwl_mvm_tx_airtime(struct iwl_mvm * mvm,struct iwl_mvm_sta * mvmsta,int airtime)1022 static void iwl_mvm_tx_airtime(struct iwl_mvm *mvm,
1023 struct iwl_mvm_sta *mvmsta,
1024 int airtime)
1025 {
1026 int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
1027 struct iwl_mvm_tcm_mac *mdata;
1028
1029 if (mac >= NUM_MAC_INDEX_DRIVER)
1030 return;
1031
1032 mdata = &mvm->tcm.data[mac];
1033
1034 if (mvm->tcm.paused)
1035 return;
1036
1037 if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD))
1038 schedule_delayed_work(&mvm->tcm.work, 0);
1039
1040 mdata->tx.airtime += airtime;
1041 }
1042
iwl_mvm_tx_pkt_queued(struct iwl_mvm * mvm,struct iwl_mvm_sta * mvmsta,int tid)1043 static int iwl_mvm_tx_pkt_queued(struct iwl_mvm *mvm,
1044 struct iwl_mvm_sta *mvmsta, int tid)
1045 {
1046 u32 ac = tid_to_mac80211_ac[tid];
1047 int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
1048 struct iwl_mvm_tcm_mac *mdata;
1049
1050 if (mac >= NUM_MAC_INDEX_DRIVER)
1051 return -EINVAL;
1052
1053 mdata = &mvm->tcm.data[mac];
1054
1055 mdata->tx.pkts[ac]++;
1056
1057 return 0;
1058 }
1059
1060 /*
1061 * Sets the fields in the Tx cmd that are crypto related.
1062 *
1063 * This function must be called with BHs disabled.
1064 */
iwl_mvm_tx_mpdu(struct iwl_mvm * mvm,struct sk_buff * skb,struct ieee80211_tx_info * info,struct ieee80211_sta * sta)1065 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb,
1066 struct ieee80211_tx_info *info,
1067 struct ieee80211_sta *sta)
1068 {
1069 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1070 struct iwl_mvm_sta *mvmsta;
1071 struct iwl_device_tx_cmd *dev_cmd;
1072 __le16 fc;
1073 u16 seq_number = 0;
1074 u8 tid = IWL_MAX_TID_COUNT;
1075 u16 txq_id;
1076 bool is_ampdu = false;
1077 int hdrlen;
1078
1079 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1080 fc = hdr->frame_control;
1081 hdrlen = ieee80211_hdrlen(fc);
1082
1083 if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc))
1084 return -1;
1085
1086 if (WARN_ON_ONCE(!mvmsta))
1087 return -1;
1088
1089 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA))
1090 return -1;
1091
1092 if (unlikely(ieee80211_is_any_nullfunc(fc)) && sta->he_cap.has_he)
1093 return -1;
1094
1095 if (unlikely(ieee80211_is_probe_resp(fc)))
1096 iwl_mvm_probe_resp_set_noa(mvm, skb);
1097
1098 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen,
1099 sta, mvmsta->sta_id);
1100 if (!dev_cmd)
1101 goto drop;
1102
1103 /*
1104 * we handle that entirely ourselves -- for uAPSD the firmware
1105 * will always send a notification, and for PS-Poll responses
1106 * we'll notify mac80211 when getting frame status
1107 */
1108 info->flags &= ~IEEE80211_TX_STATUS_EOSP;
1109
1110 spin_lock(&mvmsta->lock);
1111
1112 /* nullfunc frames should go to the MGMT queue regardless of QOS,
1113 * the condition of !ieee80211_is_qos_nullfunc(fc) keeps the default
1114 * assignment of MGMT TID
1115 */
1116 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
1117 tid = ieee80211_get_tid(hdr);
1118 if (WARN_ONCE(tid >= IWL_MAX_TID_COUNT, "Invalid TID %d", tid))
1119 goto drop_unlock_sta;
1120
1121 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU;
1122 if (WARN_ONCE(is_ampdu &&
1123 mvmsta->tid_data[tid].state != IWL_AGG_ON,
1124 "Invalid internal agg state %d for TID %d",
1125 mvmsta->tid_data[tid].state, tid))
1126 goto drop_unlock_sta;
1127
1128 seq_number = mvmsta->tid_data[tid].seq_number;
1129 seq_number &= IEEE80211_SCTL_SEQ;
1130
1131 if (!iwl_mvm_has_new_tx_api(mvm)) {
1132 struct iwl_tx_cmd *tx_cmd = (void *)dev_cmd->payload;
1133
1134 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
1135 hdr->seq_ctrl |= cpu_to_le16(seq_number);
1136 /* update the tx_cmd hdr as it was already copied */
1137 tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl;
1138 }
1139 } else if (ieee80211_is_data(fc) && !ieee80211_is_data_qos(fc)) {
1140 tid = IWL_TID_NON_QOS;
1141 }
1142
1143 txq_id = mvmsta->tid_data[tid].txq_id;
1144
1145 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
1146
1147 if (WARN_ONCE(txq_id == IWL_MVM_INVALID_QUEUE, "Invalid TXQ id")) {
1148 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1149 spin_unlock(&mvmsta->lock);
1150 return -1;
1151 }
1152
1153 if (!iwl_mvm_has_new_tx_api(mvm)) {
1154 /* Keep track of the time of the last frame for this RA/TID */
1155 mvm->queue_info[txq_id].last_frame_time[tid] = jiffies;
1156
1157 /*
1158 * If we have timed-out TIDs - schedule the worker that will
1159 * reconfig the queues and update them
1160 *
1161 * Note that the no lock is taken here in order to not serialize
1162 * the TX flow. This isn't dangerous because scheduling
1163 * mvm->add_stream_wk can't ruin the state, and if we DON'T
1164 * schedule it due to some race condition then next TX we get
1165 * here we will.
1166 */
1167 if (unlikely(mvm->queue_info[txq_id].status ==
1168 IWL_MVM_QUEUE_SHARED &&
1169 iwl_mvm_txq_should_update(mvm, txq_id)))
1170 schedule_work(&mvm->add_stream_wk);
1171 }
1172
1173 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x len %d\n",
1174 mvmsta->sta_id, tid, txq_id,
1175 IEEE80211_SEQ_TO_SN(seq_number), skb->len);
1176
1177 /* From now on, we cannot access info->control */
1178 iwl_mvm_skb_prepare_status(skb, dev_cmd);
1179
1180 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id))
1181 goto drop_unlock_sta;
1182
1183 if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc))
1184 mvmsta->tid_data[tid].seq_number = seq_number + 0x10;
1185
1186 spin_unlock(&mvmsta->lock);
1187
1188 if (iwl_mvm_tx_pkt_queued(mvm, mvmsta,
1189 tid == IWL_MAX_TID_COUNT ? 0 : tid))
1190 goto drop;
1191
1192 return 0;
1193
1194 drop_unlock_sta:
1195 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1196 spin_unlock(&mvmsta->lock);
1197 drop:
1198 IWL_DEBUG_TX(mvm, "TX to [%d|%d] dropped\n", mvmsta->sta_id, tid);
1199 return -1;
1200 }
1201
iwl_mvm_tx_skb_sta(struct iwl_mvm * mvm,struct sk_buff * skb,struct ieee80211_sta * sta)1202 int iwl_mvm_tx_skb_sta(struct iwl_mvm *mvm, struct sk_buff *skb,
1203 struct ieee80211_sta *sta)
1204 {
1205 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1206 struct ieee80211_tx_info info;
1207 struct sk_buff_head mpdus_skbs;
1208 unsigned int payload_len;
1209 int ret;
1210 struct sk_buff *orig_skb = skb;
1211
1212 if (WARN_ON_ONCE(!mvmsta))
1213 return -1;
1214
1215 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA))
1216 return -1;
1217
1218 memcpy(&info, skb->cb, sizeof(info));
1219
1220 if (!skb_is_gso(skb))
1221 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1222
1223 payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
1224 tcp_hdrlen(skb) + skb->data_len;
1225
1226 if (payload_len <= skb_shinfo(skb)->gso_size)
1227 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1228
1229 __skb_queue_head_init(&mpdus_skbs);
1230
1231 ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs);
1232 if (ret)
1233 return ret;
1234
1235 if (WARN_ON(skb_queue_empty(&mpdus_skbs)))
1236 return ret;
1237
1238 while (!skb_queue_empty(&mpdus_skbs)) {
1239 skb = __skb_dequeue(&mpdus_skbs);
1240
1241 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1242 if (ret) {
1243 /* Free skbs created as part of TSO logic that have not yet been dequeued */
1244 __skb_queue_purge(&mpdus_skbs);
1245 /* skb here is not necessarily same as skb that entered this method,
1246 * so free it explicitly.
1247 */
1248 if (skb == orig_skb)
1249 ieee80211_free_txskb(mvm->hw, skb);
1250 else
1251 kfree_skb(skb);
1252 /* there was error, but we consumed skb one way or another, so return 0 */
1253 return 0;
1254 }
1255 }
1256
1257 return 0;
1258 }
1259
iwl_mvm_check_ratid_empty(struct iwl_mvm * mvm,struct ieee80211_sta * sta,u8 tid)1260 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm,
1261 struct ieee80211_sta *sta, u8 tid)
1262 {
1263 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1264 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1265 struct ieee80211_vif *vif = mvmsta->vif;
1266 u16 normalized_ssn;
1267
1268 lockdep_assert_held(&mvmsta->lock);
1269
1270 if ((tid_data->state == IWL_AGG_ON ||
1271 tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) &&
1272 iwl_mvm_tid_queued(mvm, tid_data) == 0) {
1273 /*
1274 * Now that this aggregation or DQA queue is empty tell
1275 * mac80211 so it knows we no longer have frames buffered for
1276 * the station on this TID (for the TIM bitmap calculation.)
1277 */
1278 ieee80211_sta_set_buffered(sta, tid, false);
1279 }
1280
1281 /*
1282 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
1283 * to align the wrap around of ssn so we compare relevant values.
1284 */
1285 normalized_ssn = tid_data->ssn;
1286 if (mvm->trans->trans_cfg->gen2)
1287 normalized_ssn &= 0xff;
1288
1289 if (normalized_ssn != tid_data->next_reclaimed)
1290 return;
1291
1292 switch (tid_data->state) {
1293 case IWL_EMPTYING_HW_QUEUE_ADDBA:
1294 IWL_DEBUG_TX_QUEUES(mvm,
1295 "Can continue addBA flow ssn = next_recl = %d\n",
1296 tid_data->next_reclaimed);
1297 tid_data->state = IWL_AGG_STARTING;
1298 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1299 break;
1300
1301 case IWL_EMPTYING_HW_QUEUE_DELBA:
1302 IWL_DEBUG_TX_QUEUES(mvm,
1303 "Can continue DELBA flow ssn = next_recl = %d\n",
1304 tid_data->next_reclaimed);
1305 tid_data->state = IWL_AGG_OFF;
1306 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1307 break;
1308
1309 default:
1310 break;
1311 }
1312 }
1313
1314 #ifdef CONFIG_IWLWIFI_DEBUG
iwl_mvm_get_tx_fail_reason(u32 status)1315 const char *iwl_mvm_get_tx_fail_reason(u32 status)
1316 {
1317 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
1318 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
1319
1320 switch (status & TX_STATUS_MSK) {
1321 case TX_STATUS_SUCCESS:
1322 return "SUCCESS";
1323 TX_STATUS_POSTPONE(DELAY);
1324 TX_STATUS_POSTPONE(FEW_BYTES);
1325 TX_STATUS_POSTPONE(BT_PRIO);
1326 TX_STATUS_POSTPONE(QUIET_PERIOD);
1327 TX_STATUS_POSTPONE(CALC_TTAK);
1328 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
1329 TX_STATUS_FAIL(SHORT_LIMIT);
1330 TX_STATUS_FAIL(LONG_LIMIT);
1331 TX_STATUS_FAIL(UNDERRUN);
1332 TX_STATUS_FAIL(DRAIN_FLOW);
1333 TX_STATUS_FAIL(RFKILL_FLUSH);
1334 TX_STATUS_FAIL(LIFE_EXPIRE);
1335 TX_STATUS_FAIL(DEST_PS);
1336 TX_STATUS_FAIL(HOST_ABORTED);
1337 TX_STATUS_FAIL(BT_RETRY);
1338 TX_STATUS_FAIL(STA_INVALID);
1339 TX_STATUS_FAIL(FRAG_DROPPED);
1340 TX_STATUS_FAIL(TID_DISABLE);
1341 TX_STATUS_FAIL(FIFO_FLUSHED);
1342 TX_STATUS_FAIL(SMALL_CF_POLL);
1343 TX_STATUS_FAIL(FW_DROP);
1344 TX_STATUS_FAIL(STA_COLOR_MISMATCH);
1345 }
1346
1347 return "UNKNOWN";
1348
1349 #undef TX_STATUS_FAIL
1350 #undef TX_STATUS_POSTPONE
1351 }
1352 #endif /* CONFIG_IWLWIFI_DEBUG */
1353
iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags,enum nl80211_band band,struct ieee80211_tx_rate * r)1354 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags,
1355 enum nl80211_band band,
1356 struct ieee80211_tx_rate *r)
1357 {
1358 if (rate_n_flags & RATE_HT_MCS_GF_MSK)
1359 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
1360 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
1361 case RATE_MCS_CHAN_WIDTH_20:
1362 break;
1363 case RATE_MCS_CHAN_WIDTH_40:
1364 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
1365 break;
1366 case RATE_MCS_CHAN_WIDTH_80:
1367 r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH;
1368 break;
1369 case RATE_MCS_CHAN_WIDTH_160:
1370 r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH;
1371 break;
1372 }
1373 if (rate_n_flags & RATE_MCS_SGI_MSK)
1374 r->flags |= IEEE80211_TX_RC_SHORT_GI;
1375 if (rate_n_flags & RATE_MCS_HT_MSK) {
1376 r->flags |= IEEE80211_TX_RC_MCS;
1377 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
1378 } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
1379 ieee80211_rate_set_vht(
1380 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK,
1381 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
1382 RATE_VHT_MCS_NSS_POS) + 1);
1383 r->flags |= IEEE80211_TX_RC_VHT_MCS;
1384 } else {
1385 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
1386 band);
1387 }
1388 }
1389
1390 /*
1391 * translate ucode response to mac80211 tx status control values
1392 */
iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags,struct ieee80211_tx_info * info)1393 static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags,
1394 struct ieee80211_tx_info *info)
1395 {
1396 struct ieee80211_tx_rate *r = &info->status.rates[0];
1397
1398 info->status.antenna =
1399 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
1400 iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r);
1401 }
1402
iwl_mvm_tx_status_check_trigger(struct iwl_mvm * mvm,u32 status)1403 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm,
1404 u32 status)
1405 {
1406 struct iwl_fw_dbg_trigger_tlv *trig;
1407 struct iwl_fw_dbg_trigger_tx_status *status_trig;
1408 int i;
1409
1410 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL,
1411 FW_DBG_TRIGGER_TX_STATUS);
1412 if (!trig)
1413 return;
1414
1415 status_trig = (void *)trig->data;
1416
1417 for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) {
1418 /* don't collect on status 0 */
1419 if (!status_trig->statuses[i].status)
1420 break;
1421
1422 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK))
1423 continue;
1424
1425 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
1426 "Tx status %d was received",
1427 status & TX_STATUS_MSK);
1428 break;
1429 }
1430 }
1431
1432 /*
1433 * iwl_mvm_get_scd_ssn - returns the SSN of the SCD
1434 * @tx_resp: the Tx response from the fw (agg or non-agg)
1435 *
1436 * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since
1437 * it can't know that everything will go well until the end of the AMPDU, it
1438 * can't know in advance the number of MPDUs that will be sent in the current
1439 * batch. This is why it writes the agg Tx response while it fetches the MPDUs.
1440 * Hence, it can't know in advance what the SSN of the SCD will be at the end
1441 * of the batch. This is why the SSN of the SCD is written at the end of the
1442 * whole struct at a variable offset. This function knows how to cope with the
1443 * variable offset and returns the SSN of the SCD.
1444 */
iwl_mvm_get_scd_ssn(struct iwl_mvm * mvm,struct iwl_mvm_tx_resp * tx_resp)1445 static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm,
1446 struct iwl_mvm_tx_resp *tx_resp)
1447 {
1448 return le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) +
1449 tx_resp->frame_count) & 0xfff;
1450 }
1451
iwl_mvm_rx_tx_cmd_single(struct iwl_mvm * mvm,struct iwl_rx_packet * pkt)1452 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm,
1453 struct iwl_rx_packet *pkt)
1454 {
1455 struct ieee80211_sta *sta;
1456 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1457 int txq_id = SEQ_TO_QUEUE(sequence);
1458 /* struct iwl_mvm_tx_resp_v3 is almost the same */
1459 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1460 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1461 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1462 struct agg_tx_status *agg_status =
1463 iwl_mvm_get_agg_status(mvm, tx_resp);
1464 u32 status = le16_to_cpu(agg_status->status);
1465 u16 ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp);
1466 struct sk_buff_head skbs;
1467 u8 skb_freed = 0;
1468 u8 lq_color;
1469 u16 next_reclaimed, seq_ctl;
1470 bool is_ndp = false;
1471
1472 __skb_queue_head_init(&skbs);
1473
1474 if (iwl_mvm_has_new_tx_api(mvm))
1475 txq_id = le16_to_cpu(tx_resp->tx_queue);
1476
1477 seq_ctl = le16_to_cpu(tx_resp->seq_ctl);
1478
1479 /* we can free until ssn % q.n_bd not inclusive */
1480 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs);
1481
1482 while (!skb_queue_empty(&skbs)) {
1483 struct sk_buff *skb = __skb_dequeue(&skbs);
1484 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1485 struct ieee80211_hdr *hdr = (void *)skb->data;
1486 bool flushed = false;
1487
1488 skb_freed++;
1489
1490 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1491
1492 memset(&info->status, 0, sizeof(info->status));
1493
1494 /* inform mac80211 about what happened with the frame */
1495 switch (status & TX_STATUS_MSK) {
1496 case TX_STATUS_SUCCESS:
1497 case TX_STATUS_DIRECT_DONE:
1498 info->flags |= IEEE80211_TX_STAT_ACK;
1499 break;
1500 case TX_STATUS_FAIL_FIFO_FLUSHED:
1501 case TX_STATUS_FAIL_DRAIN_FLOW:
1502 flushed = true;
1503 break;
1504 case TX_STATUS_FAIL_DEST_PS:
1505 /* the FW should have stopped the queue and not
1506 * return this status
1507 */
1508 WARN_ON(1);
1509 info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
1510 break;
1511 default:
1512 break;
1513 }
1514
1515 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS &&
1516 ieee80211_is_mgmt(hdr->frame_control))
1517 iwl_mvm_toggle_tx_ant(mvm, &mvm->mgmt_last_antenna_idx);
1518
1519 /*
1520 * If we are freeing multiple frames, mark all the frames
1521 * but the first one as acked, since they were acknowledged
1522 * before
1523 * */
1524 if (skb_freed > 1)
1525 info->flags |= IEEE80211_TX_STAT_ACK;
1526
1527 iwl_mvm_tx_status_check_trigger(mvm, status);
1528
1529 info->status.rates[0].count = tx_resp->failure_frame + 1;
1530 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate),
1531 info);
1532 info->status.status_driver_data[1] =
1533 (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate);
1534
1535 /* Single frame failure in an AMPDU queue => send BAR */
1536 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
1537 !(info->flags & IEEE80211_TX_STAT_ACK) &&
1538 !(info->flags & IEEE80211_TX_STAT_TX_FILTERED) && !flushed)
1539 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1540 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1541
1542 /* W/A FW bug: seq_ctl is wrong upon failure / BAR frame */
1543 if (ieee80211_is_back_req(hdr->frame_control))
1544 seq_ctl = 0;
1545 else if (status != TX_STATUS_SUCCESS)
1546 seq_ctl = le16_to_cpu(hdr->seq_ctrl);
1547
1548 if (unlikely(!seq_ctl)) {
1549 struct ieee80211_hdr *hdr = (void *)skb->data;
1550
1551 /*
1552 * If it is an NDP, we can't update next_reclaim since
1553 * its sequence control is 0. Note that for that same
1554 * reason, NDPs are never sent to A-MPDU'able queues
1555 * so that we can never have more than one freed frame
1556 * for a single Tx resonse (see WARN_ON below).
1557 */
1558 if (ieee80211_is_qos_nullfunc(hdr->frame_control))
1559 is_ndp = true;
1560 }
1561
1562 /*
1563 * TODO: this is not accurate if we are freeing more than one
1564 * packet.
1565 */
1566 info->status.tx_time =
1567 le16_to_cpu(tx_resp->wireless_media_time);
1568 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1);
1569 lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info);
1570 info->status.status_driver_data[0] =
1571 RS_DRV_DATA_PACK(lq_color, tx_resp->reduced_tpc);
1572
1573 ieee80211_tx_status(mvm->hw, skb);
1574 }
1575
1576 /* This is an aggregation queue or might become one, so we use
1577 * the ssn since: ssn = wifi seq_num % 256.
1578 * The seq_ctl is the sequence control of the packet to which
1579 * this Tx response relates. But if there is a hole in the
1580 * bitmap of the BA we received, this Tx response may allow to
1581 * reclaim the hole and all the subsequent packets that were
1582 * already acked. In that case, seq_ctl != ssn, and the next
1583 * packet to be reclaimed will be ssn and not seq_ctl. In that
1584 * case, several packets will be reclaimed even if
1585 * frame_count = 1.
1586 *
1587 * The ssn is the index (% 256) of the latest packet that has
1588 * treated (acked / dropped) + 1.
1589 */
1590 next_reclaimed = ssn;
1591
1592 IWL_DEBUG_TX_REPLY(mvm,
1593 "TXQ %d status %s (0x%08x)\n",
1594 txq_id, iwl_mvm_get_tx_fail_reason(status), status);
1595
1596 IWL_DEBUG_TX_REPLY(mvm,
1597 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
1598 le32_to_cpu(tx_resp->initial_rate),
1599 tx_resp->failure_frame, SEQ_TO_INDEX(sequence),
1600 ssn, next_reclaimed, seq_ctl);
1601
1602 rcu_read_lock();
1603
1604 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1605 /*
1606 * sta can't be NULL otherwise it'd mean that the sta has been freed in
1607 * the firmware while we still have packets for it in the Tx queues.
1608 */
1609 if (WARN_ON_ONCE(!sta))
1610 goto out;
1611
1612 if (!IS_ERR(sta)) {
1613 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1614
1615 iwl_mvm_tx_airtime(mvm, mvmsta,
1616 le16_to_cpu(tx_resp->wireless_media_time));
1617
1618 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS &&
1619 mvmsta->sta_state < IEEE80211_STA_AUTHORIZED)
1620 iwl_mvm_toggle_tx_ant(mvm, &mvmsta->tx_ant);
1621
1622 if (sta->wme && tid != IWL_MGMT_TID) {
1623 struct iwl_mvm_tid_data *tid_data =
1624 &mvmsta->tid_data[tid];
1625 bool send_eosp_ndp = false;
1626
1627 spin_lock_bh(&mvmsta->lock);
1628
1629 if (!is_ndp) {
1630 tid_data->next_reclaimed = next_reclaimed;
1631 IWL_DEBUG_TX_REPLY(mvm,
1632 "Next reclaimed packet:%d\n",
1633 next_reclaimed);
1634 } else {
1635 IWL_DEBUG_TX_REPLY(mvm,
1636 "NDP - don't update next_reclaimed\n");
1637 }
1638
1639 iwl_mvm_check_ratid_empty(mvm, sta, tid);
1640
1641 if (mvmsta->sleep_tx_count) {
1642 mvmsta->sleep_tx_count--;
1643 if (mvmsta->sleep_tx_count &&
1644 !iwl_mvm_tid_queued(mvm, tid_data)) {
1645 /*
1646 * The number of frames in the queue
1647 * dropped to 0 even if we sent less
1648 * frames than we thought we had on the
1649 * Tx queue.
1650 * This means we had holes in the BA
1651 * window that we just filled, ask
1652 * mac80211 to send EOSP since the
1653 * firmware won't know how to do that.
1654 * Send NDP and the firmware will send
1655 * EOSP notification that will trigger
1656 * a call to ieee80211_sta_eosp().
1657 */
1658 send_eosp_ndp = true;
1659 }
1660 }
1661
1662 spin_unlock_bh(&mvmsta->lock);
1663 if (send_eosp_ndp) {
1664 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta,
1665 IEEE80211_FRAME_RELEASE_UAPSD,
1666 1, tid, false, false);
1667 mvmsta->sleep_tx_count = 0;
1668 ieee80211_send_eosp_nullfunc(sta, tid);
1669 }
1670 }
1671
1672 if (mvmsta->next_status_eosp) {
1673 mvmsta->next_status_eosp = false;
1674 ieee80211_sta_eosp(sta);
1675 }
1676 }
1677 out:
1678 rcu_read_unlock();
1679 }
1680
1681 #ifdef CONFIG_IWLWIFI_DEBUG
1682 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
iwl_get_agg_tx_status(u16 status)1683 static const char *iwl_get_agg_tx_status(u16 status)
1684 {
1685 switch (status & AGG_TX_STATE_STATUS_MSK) {
1686 AGG_TX_STATE_(TRANSMITTED);
1687 AGG_TX_STATE_(UNDERRUN);
1688 AGG_TX_STATE_(BT_PRIO);
1689 AGG_TX_STATE_(FEW_BYTES);
1690 AGG_TX_STATE_(ABORT);
1691 AGG_TX_STATE_(TX_ON_AIR_DROP);
1692 AGG_TX_STATE_(LAST_SENT_TRY_CNT);
1693 AGG_TX_STATE_(LAST_SENT_BT_KILL);
1694 AGG_TX_STATE_(SCD_QUERY);
1695 AGG_TX_STATE_(TEST_BAD_CRC32);
1696 AGG_TX_STATE_(RESPONSE);
1697 AGG_TX_STATE_(DUMP_TX);
1698 AGG_TX_STATE_(DELAY_TX);
1699 }
1700
1701 return "UNKNOWN";
1702 }
1703
iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm * mvm,struct iwl_rx_packet * pkt)1704 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1705 struct iwl_rx_packet *pkt)
1706 {
1707 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1708 struct agg_tx_status *frame_status =
1709 iwl_mvm_get_agg_status(mvm, tx_resp);
1710 int i;
1711
1712 for (i = 0; i < tx_resp->frame_count; i++) {
1713 u16 fstatus = le16_to_cpu(frame_status[i].status);
1714
1715 IWL_DEBUG_TX_REPLY(mvm,
1716 "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
1717 iwl_get_agg_tx_status(fstatus),
1718 fstatus & AGG_TX_STATE_STATUS_MSK,
1719 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >>
1720 AGG_TX_STATE_TRY_CNT_POS,
1721 le16_to_cpu(frame_status[i].sequence));
1722 }
1723 }
1724 #else
iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm * mvm,struct iwl_rx_packet * pkt)1725 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1726 struct iwl_rx_packet *pkt)
1727 {}
1728 #endif /* CONFIG_IWLWIFI_DEBUG */
1729
iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm * mvm,struct iwl_rx_packet * pkt)1730 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm,
1731 struct iwl_rx_packet *pkt)
1732 {
1733 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1734 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1735 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1736 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1737 struct iwl_mvm_sta *mvmsta;
1738 int queue = SEQ_TO_QUEUE(sequence);
1739 struct ieee80211_sta *sta;
1740
1741 if (WARN_ON_ONCE(queue < IWL_MVM_DQA_MIN_DATA_QUEUE &&
1742 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)))
1743 return;
1744
1745 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt);
1746
1747 rcu_read_lock();
1748
1749 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1750
1751 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1752 if (WARN_ON_ONCE(!sta || !sta->wme)) {
1753 rcu_read_unlock();
1754 return;
1755 }
1756
1757 if (!WARN_ON_ONCE(!mvmsta)) {
1758 mvmsta->tid_data[tid].rate_n_flags =
1759 le32_to_cpu(tx_resp->initial_rate);
1760 mvmsta->tid_data[tid].tx_time =
1761 le16_to_cpu(tx_resp->wireless_media_time);
1762 mvmsta->tid_data[tid].lq_color =
1763 TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info);
1764 iwl_mvm_tx_airtime(mvm, mvmsta,
1765 le16_to_cpu(tx_resp->wireless_media_time));
1766 }
1767
1768 rcu_read_unlock();
1769 }
1770
iwl_mvm_rx_tx_cmd(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)1771 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1772 {
1773 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1774 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1775
1776 if (tx_resp->frame_count == 1)
1777 iwl_mvm_rx_tx_cmd_single(mvm, pkt);
1778 else
1779 iwl_mvm_rx_tx_cmd_agg(mvm, pkt);
1780 }
1781
iwl_mvm_tx_reclaim(struct iwl_mvm * mvm,int sta_id,int tid,int txq,int index,struct ieee80211_tx_info * ba_info,u32 rate)1782 static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid,
1783 int txq, int index,
1784 struct ieee80211_tx_info *ba_info, u32 rate)
1785 {
1786 struct sk_buff_head reclaimed_skbs;
1787 struct iwl_mvm_tid_data *tid_data = NULL;
1788 struct ieee80211_sta *sta;
1789 struct iwl_mvm_sta *mvmsta = NULL;
1790 struct sk_buff *skb;
1791 int freed;
1792
1793 if (WARN_ONCE(sta_id >= mvm->fw->ucode_capa.num_stations ||
1794 tid > IWL_MAX_TID_COUNT,
1795 "sta_id %d tid %d", sta_id, tid))
1796 return;
1797
1798 rcu_read_lock();
1799
1800 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1801
1802 /* Reclaiming frames for a station that has been deleted ? */
1803 if (WARN_ON_ONCE(!sta)) {
1804 rcu_read_unlock();
1805 return;
1806 }
1807
1808 __skb_queue_head_init(&reclaimed_skbs);
1809
1810 /*
1811 * Release all TFDs before the SSN, i.e. all TFDs in front of
1812 * block-ack window (we assume that they've been successfully
1813 * transmitted ... if not, it's too late anyway).
1814 */
1815 iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs);
1816
1817 skb_queue_walk(&reclaimed_skbs, skb) {
1818 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1819
1820 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1821
1822 memset(&info->status, 0, sizeof(info->status));
1823 /* Packet was transmitted successfully, failures come as single
1824 * frames because before failing a frame the firmware transmits
1825 * it without aggregation at least once.
1826 */
1827 info->flags |= IEEE80211_TX_STAT_ACK;
1828 }
1829
1830 /*
1831 * It's possible to get a BA response after invalidating the rcu (rcu is
1832 * invalidated in order to prevent new Tx from being sent, but there may
1833 * be some frames already in-flight).
1834 * In this case we just want to reclaim, and could skip all the
1835 * sta-dependent stuff since it's in the middle of being removed
1836 * anyways.
1837 */
1838 if (IS_ERR(sta))
1839 goto out;
1840
1841 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1842 tid_data = &mvmsta->tid_data[tid];
1843
1844 if (tid_data->txq_id != txq) {
1845 IWL_ERR(mvm,
1846 "invalid BA notification: Q %d, tid %d\n",
1847 tid_data->txq_id, tid);
1848 rcu_read_unlock();
1849 return;
1850 }
1851
1852 spin_lock_bh(&mvmsta->lock);
1853
1854 tid_data->next_reclaimed = index;
1855
1856 iwl_mvm_check_ratid_empty(mvm, sta, tid);
1857
1858 freed = 0;
1859
1860 /* pack lq color from tid_data along the reduced txp */
1861 ba_info->status.status_driver_data[0] =
1862 RS_DRV_DATA_PACK(tid_data->lq_color,
1863 ba_info->status.status_driver_data[0]);
1864 ba_info->status.status_driver_data[1] = (void *)(uintptr_t)rate;
1865
1866 skb_queue_walk(&reclaimed_skbs, skb) {
1867 struct ieee80211_hdr *hdr = (void *)skb->data;
1868 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1869
1870 if (ieee80211_is_data_qos(hdr->frame_control))
1871 freed++;
1872 else
1873 WARN_ON_ONCE(tid != IWL_MAX_TID_COUNT);
1874
1875 /* this is the first skb we deliver in this batch */
1876 /* put the rate scaling data there */
1877 if (freed == 1) {
1878 info->flags |= IEEE80211_TX_STAT_AMPDU;
1879 memcpy(&info->status, &ba_info->status,
1880 sizeof(ba_info->status));
1881 iwl_mvm_hwrate_to_tx_status(rate, info);
1882 }
1883 }
1884
1885 spin_unlock_bh(&mvmsta->lock);
1886
1887 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is
1888 * possible (i.e. first MPDU in the aggregation wasn't acked)
1889 * Still it's important to update RS about sent vs. acked.
1890 */
1891 if (skb_queue_empty(&reclaimed_skbs)) {
1892 struct ieee80211_chanctx_conf *chanctx_conf = NULL;
1893
1894 if (mvmsta->vif)
1895 chanctx_conf =
1896 rcu_dereference(mvmsta->vif->chanctx_conf);
1897
1898 if (WARN_ON_ONCE(!chanctx_conf))
1899 goto out;
1900
1901 ba_info->band = chanctx_conf->def.chan->band;
1902 iwl_mvm_hwrate_to_tx_status(rate, ba_info);
1903
1904 if (!iwl_mvm_has_tlc_offload(mvm)) {
1905 IWL_DEBUG_TX_REPLY(mvm,
1906 "No reclaim. Update rs directly\n");
1907 iwl_mvm_rs_tx_status(mvm, sta, tid, ba_info, false);
1908 }
1909 }
1910
1911 out:
1912 rcu_read_unlock();
1913
1914 while (!skb_queue_empty(&reclaimed_skbs)) {
1915 skb = __skb_dequeue(&reclaimed_skbs);
1916 ieee80211_tx_status(mvm->hw, skb);
1917 }
1918 }
1919
iwl_mvm_rx_ba_notif(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)1920 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1921 {
1922 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1923 int sta_id, tid, txq, index;
1924 struct ieee80211_tx_info ba_info = {};
1925 struct iwl_mvm_ba_notif *ba_notif;
1926 struct iwl_mvm_tid_data *tid_data;
1927 struct iwl_mvm_sta *mvmsta;
1928
1929 ba_info.flags = IEEE80211_TX_STAT_AMPDU;
1930
1931 if (iwl_mvm_has_new_tx_api(mvm)) {
1932 struct iwl_mvm_compressed_ba_notif *ba_res =
1933 (void *)pkt->data;
1934 u8 lq_color = TX_RES_RATE_TABLE_COL_GET(ba_res->tlc_rate_info);
1935 int i;
1936
1937 sta_id = ba_res->sta_id;
1938 ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done);
1939 ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed);
1940 ba_info.status.tx_time =
1941 (u16)le32_to_cpu(ba_res->wireless_time);
1942 ba_info.status.status_driver_data[0] =
1943 (void *)(uintptr_t)ba_res->reduced_txp;
1944
1945 if (!le16_to_cpu(ba_res->tfd_cnt))
1946 goto out;
1947
1948 rcu_read_lock();
1949
1950 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1951 /*
1952 * It's possible to get a BA response after invalidating the rcu
1953 * (rcu is invalidated in order to prevent new Tx from being
1954 * sent, but there may be some frames already in-flight).
1955 * In this case we just want to reclaim, and could skip all the
1956 * sta-dependent stuff since it's in the middle of being removed
1957 * anyways.
1958 */
1959
1960 /* Free per TID */
1961 for (i = 0; i < le16_to_cpu(ba_res->tfd_cnt); i++) {
1962 struct iwl_mvm_compressed_ba_tfd *ba_tfd =
1963 &ba_res->tfd[i];
1964
1965 tid = ba_tfd->tid;
1966 if (tid == IWL_MGMT_TID)
1967 tid = IWL_MAX_TID_COUNT;
1968
1969 if (mvmsta)
1970 mvmsta->tid_data[i].lq_color = lq_color;
1971
1972 iwl_mvm_tx_reclaim(mvm, sta_id, tid,
1973 (int)(le16_to_cpu(ba_tfd->q_num)),
1974 le16_to_cpu(ba_tfd->tfd_index),
1975 &ba_info,
1976 le32_to_cpu(ba_res->tx_rate));
1977 }
1978
1979 if (mvmsta)
1980 iwl_mvm_tx_airtime(mvm, mvmsta,
1981 le32_to_cpu(ba_res->wireless_time));
1982 rcu_read_unlock();
1983 out:
1984 IWL_DEBUG_TX_REPLY(mvm,
1985 "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n",
1986 sta_id, le32_to_cpu(ba_res->flags),
1987 le16_to_cpu(ba_res->txed),
1988 le16_to_cpu(ba_res->done));
1989 return;
1990 }
1991
1992 ba_notif = (void *)pkt->data;
1993 sta_id = ba_notif->sta_id;
1994 tid = ba_notif->tid;
1995 /* "flow" corresponds to Tx queue */
1996 txq = le16_to_cpu(ba_notif->scd_flow);
1997 /* "ssn" is start of block-ack Tx window, corresponds to index
1998 * (in Tx queue's circular buffer) of first TFD/frame in window */
1999 index = le16_to_cpu(ba_notif->scd_ssn);
2000
2001 rcu_read_lock();
2002 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
2003 if (WARN_ON_ONCE(!mvmsta)) {
2004 rcu_read_unlock();
2005 return;
2006 }
2007
2008 tid_data = &mvmsta->tid_data[tid];
2009
2010 ba_info.status.ampdu_ack_len = ba_notif->txed_2_done;
2011 ba_info.status.ampdu_len = ba_notif->txed;
2012 ba_info.status.tx_time = tid_data->tx_time;
2013 ba_info.status.status_driver_data[0] =
2014 (void *)(uintptr_t)ba_notif->reduced_txp;
2015
2016 rcu_read_unlock();
2017
2018 iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info,
2019 tid_data->rate_n_flags);
2020
2021 IWL_DEBUG_TX_REPLY(mvm,
2022 "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
2023 ba_notif->sta_addr, ba_notif->sta_id);
2024
2025 IWL_DEBUG_TX_REPLY(mvm,
2026 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
2027 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl),
2028 le64_to_cpu(ba_notif->bitmap), txq, index,
2029 ba_notif->txed, ba_notif->txed_2_done);
2030
2031 IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n",
2032 ba_notif->reduced_txp);
2033 }
2034
2035 /*
2036 * Note that there are transports that buffer frames before they reach
2037 * the firmware. This means that after flush_tx_path is called, the
2038 * queue might not be empty. The race-free way to handle this is to:
2039 * 1) set the station as draining
2040 * 2) flush the Tx path
2041 * 3) wait for the transport queues to be empty
2042 */
iwl_mvm_flush_tx_path(struct iwl_mvm * mvm,u32 tfd_msk,u32 flags)2043 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, u32 flags)
2044 {
2045 int ret;
2046 struct iwl_tx_path_flush_cmd_v1 flush_cmd = {
2047 .queues_ctl = cpu_to_le32(tfd_msk),
2048 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH),
2049 };
2050
2051 WARN_ON(iwl_mvm_has_new_tx_api(mvm));
2052
2053 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags,
2054 sizeof(flush_cmd), &flush_cmd);
2055 if (ret)
2056 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
2057 return ret;
2058 }
2059
iwl_mvm_flush_sta_tids(struct iwl_mvm * mvm,u32 sta_id,u16 tids,u32 flags)2060 int iwl_mvm_flush_sta_tids(struct iwl_mvm *mvm, u32 sta_id,
2061 u16 tids, u32 flags)
2062 {
2063 int ret;
2064 struct iwl_tx_path_flush_cmd flush_cmd = {
2065 .sta_id = cpu_to_le32(sta_id),
2066 .tid_mask = cpu_to_le16(tids),
2067 };
2068
2069 WARN_ON(!iwl_mvm_has_new_tx_api(mvm));
2070
2071 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags,
2072 sizeof(flush_cmd), &flush_cmd);
2073 if (ret)
2074 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
2075 return ret;
2076 }
2077
iwl_mvm_flush_sta(struct iwl_mvm * mvm,void * sta,bool internal)2078 int iwl_mvm_flush_sta(struct iwl_mvm *mvm, void *sta, bool internal)
2079 {
2080 struct iwl_mvm_int_sta *int_sta = sta;
2081 struct iwl_mvm_sta *mvm_sta = sta;
2082
2083 BUILD_BUG_ON(offsetof(struct iwl_mvm_int_sta, sta_id) !=
2084 offsetof(struct iwl_mvm_sta, sta_id));
2085
2086 if (iwl_mvm_has_new_tx_api(mvm))
2087 return iwl_mvm_flush_sta_tids(mvm, mvm_sta->sta_id, 0xffff, 0);
2088
2089 if (internal)
2090 return iwl_mvm_flush_tx_path(mvm, int_sta->tfd_queue_msk, 0);
2091
2092 return iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, 0);
2093 }
2094