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gpio: rcar: Fix runtime PM imbalance on error
[linux/fpc-iii.git] / drivers / net / wireless / intel / iwlwifi / mvm / tx.c
bloba8d0d17f79fd285c004768413e719f731d55a336
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 - 2019 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 - 2019 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
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
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 */
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
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
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
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 */
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
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 */
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 *
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 packets rate info comes from the fw. Only
536 * set rate/antenna during connection establishment or in case
537 * no station is given.
538 */
539 if (!sta || !ieee80211_is_data(hdr->frame_control) ||
540 mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) {
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 }
546
547 if (mvm->trans->trans_cfg->device_family >=
548 IWL_DEVICE_FAMILY_AX210) {
549 struct iwl_tx_cmd_gen3 *cmd = (void *)dev_cmd->payload;
550
551 cmd->offload_assist |= cpu_to_le32(offload_assist);
552
553 /* Total # bytes to be transmitted */
554 cmd->len = cpu_to_le16((u16)skb->len);
555
556 /* Copy MAC header from skb into command buffer */
557 memcpy(cmd->hdr, hdr, hdrlen);
558
559 cmd->flags = cpu_to_le16(flags);
560 cmd->rate_n_flags = cpu_to_le32(rate_n_flags);
561 } else {
562 struct iwl_tx_cmd_gen2 *cmd = (void *)dev_cmd->payload;
563
564 cmd->offload_assist |= cpu_to_le16(offload_assist);
565
566 /* Total # bytes to be transmitted */
567 cmd->len = cpu_to_le16((u16)skb->len);
568
569 /* Copy MAC header from skb into command buffer */
570 memcpy(cmd->hdr, hdr, hdrlen);
571
572 cmd->flags = cpu_to_le32(flags);
573 cmd->rate_n_flags = cpu_to_le32(rate_n_flags);
574 }
575 goto out;
576 }
577
578 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
579
580 if (info->control.hw_key)
581 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen);
582
583 iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id);
584
585 iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control);
586
587 /* Copy MAC header from skb into command buffer */
588 memcpy(tx_cmd->hdr, hdr, hdrlen);
589
590 out:
591 return dev_cmd;
592 }
593
594 static void iwl_mvm_skb_prepare_status(struct sk_buff *skb,
595 struct iwl_device_tx_cmd *cmd)
596 {
597 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb);
598
599 memset(&skb_info->status, 0, sizeof(skb_info->status));
600 memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data));
601
602 skb_info->driver_data[1] = cmd;
603 }
604
605 static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm,
606 struct ieee80211_tx_info *info,
607 struct ieee80211_hdr *hdr)
608 {
609 struct iwl_mvm_vif *mvmvif =
610 iwl_mvm_vif_from_mac80211(info->control.vif);
611 __le16 fc = hdr->frame_control;
612
613 switch (info->control.vif->type) {
614 case NL80211_IFTYPE_AP:
615 case NL80211_IFTYPE_ADHOC:
616 /*
617 * Non-bufferable frames use the broadcast station, thus they
618 * use the probe queue.
619 * Also take care of the case where we send a deauth to a
620 * station that we don't have, or similarly an association
621 * response (with non-success status) for a station we can't
622 * accept.
623 * Also, disassociate frames might happen, particular with
624 * reason 7 ("Class 3 frame received from nonassociated STA").
625 */
626 if (ieee80211_is_mgmt(fc) &&
627 (!ieee80211_is_bufferable_mmpdu(fc) ||
628 ieee80211_is_deauth(fc) || ieee80211_is_disassoc(fc)))
629 return mvm->probe_queue;
630
631 if (!ieee80211_has_order(fc) && !ieee80211_is_probe_req(fc) &&
632 is_multicast_ether_addr(hdr->addr1))
633 return mvmvif->cab_queue;
634
635 WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC,
636 "fc=0x%02x", le16_to_cpu(fc));
637 return mvm->probe_queue;
638 case NL80211_IFTYPE_P2P_DEVICE:
639 if (ieee80211_is_mgmt(fc))
640 return mvm->p2p_dev_queue;
641
642 WARN_ON_ONCE(1);
643 return mvm->p2p_dev_queue;
644 default:
645 WARN_ONCE(1, "Not a ctrl vif, no available queue\n");
646 return -1;
647 }
648 }
649
650 static void iwl_mvm_probe_resp_set_noa(struct iwl_mvm *mvm,
651 struct sk_buff *skb)
652 {
653 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
654 struct iwl_mvm_vif *mvmvif =
655 iwl_mvm_vif_from_mac80211(info->control.vif);
656 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
657 int base_len = (u8 *)mgmt->u.probe_resp.variable - (u8 *)mgmt;
658 struct iwl_probe_resp_data *resp_data;
659 u8 *ie, *pos;
660 u8 match[] = {
661 (WLAN_OUI_WFA >> 16) & 0xff,
662 (WLAN_OUI_WFA >> 8) & 0xff,
663 WLAN_OUI_WFA & 0xff,
664 WLAN_OUI_TYPE_WFA_P2P,
665 };
666
667 rcu_read_lock();
668
669 resp_data = rcu_dereference(mvmvif->probe_resp_data);
670 if (!resp_data)
671 goto out;
672
673 if (!resp_data->notif.noa_active)
674 goto out;
675
676 ie = (u8 *)cfg80211_find_ie_match(WLAN_EID_VENDOR_SPECIFIC,
677 mgmt->u.probe_resp.variable,
678 skb->len - base_len,
679 match, 4, 2);
680 if (!ie) {
681 IWL_DEBUG_TX(mvm, "probe resp doesn't have P2P IE\n");
682 goto out;
683 }
684
685 if (skb_tailroom(skb) < resp_data->noa_len) {
686 if (pskb_expand_head(skb, 0, resp_data->noa_len, GFP_ATOMIC)) {
687 IWL_ERR(mvm,
688 "Failed to reallocate probe resp\n");
689 goto out;
690 }
691 }
692
693 pos = skb_put(skb, resp_data->noa_len);
694
695 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
696 /* Set length of IE body (not including ID and length itself) */
697 *pos++ = resp_data->noa_len - 2;
698 *pos++ = (WLAN_OUI_WFA >> 16) & 0xff;
699 *pos++ = (WLAN_OUI_WFA >> 8) & 0xff;
700 *pos++ = WLAN_OUI_WFA & 0xff;
701 *pos++ = WLAN_OUI_TYPE_WFA_P2P;
702
703 memcpy(pos, &resp_data->notif.noa_attr,
704 resp_data->noa_len - sizeof(struct ieee80211_vendor_ie));
705
706 out:
707 rcu_read_unlock();
708 }
709
710 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb)
711 {
712 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
713 struct ieee80211_tx_info info;
714 struct iwl_device_tx_cmd *dev_cmd;
715 u8 sta_id;
716 int hdrlen = ieee80211_hdrlen(hdr->frame_control);
717 __le16 fc = hdr->frame_control;
718 bool offchannel = IEEE80211_SKB_CB(skb)->flags &
719 IEEE80211_TX_CTL_TX_OFFCHAN;
720 int queue = -1;
721
722 if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc))
723 return -1;
724
725 memcpy(&info, skb->cb, sizeof(info));
726
727 if (WARN_ON_ONCE(skb->len > IEEE80211_MAX_DATA_LEN + hdrlen))
728 return -1;
729
730 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU))
731 return -1;
732
733 if (info.control.vif) {
734 struct iwl_mvm_vif *mvmvif =
735 iwl_mvm_vif_from_mac80211(info.control.vif);
736
737 if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE ||
738 info.control.vif->type == NL80211_IFTYPE_AP ||
739 info.control.vif->type == NL80211_IFTYPE_ADHOC) {
740 if (!ieee80211_is_data(hdr->frame_control))
741 sta_id = mvmvif->bcast_sta.sta_id;
742 else
743 sta_id = mvmvif->mcast_sta.sta_id;
744
745 queue = iwl_mvm_get_ctrl_vif_queue(mvm, &info, hdr);
746 } else if (info.control.vif->type == NL80211_IFTYPE_MONITOR) {
747 queue = mvm->snif_queue;
748 sta_id = mvm->snif_sta.sta_id;
749 } else if (info.control.vif->type == NL80211_IFTYPE_STATION &&
750 offchannel) {
751 /*
752 * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets
753 * that can be used in 2 different types of vifs, P2P &
754 * STATION.
755 * P2P uses the offchannel queue.
756 * STATION (HS2.0) uses the auxiliary context of the FW,
757 * and hence needs to be sent on the aux queue.
758 */
759 sta_id = mvm->aux_sta.sta_id;
760 queue = mvm->aux_queue;
761 }
762 }
763
764 if (queue < 0) {
765 IWL_ERR(mvm, "No queue was found. Dropping TX\n");
766 return -1;
767 }
768
769 if (unlikely(ieee80211_is_probe_resp(fc)))
770 iwl_mvm_probe_resp_set_noa(mvm, skb);
771
772 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue);
773
774 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id);
775 if (!dev_cmd)
776 return -1;
777
778 /* From now on, we cannot access info->control */
779 iwl_mvm_skb_prepare_status(skb, dev_cmd);
780
781 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) {
782 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
783 return -1;
784 }
785
786 return 0;
787 }
788
789 unsigned int iwl_mvm_max_amsdu_size(struct iwl_mvm *mvm,
790 struct ieee80211_sta *sta, unsigned int tid)
791 {
792 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
793 enum nl80211_band band = mvmsta->vif->bss_conf.chandef.chan->band;
794 u8 ac = tid_to_mac80211_ac[tid];
795 unsigned int txf;
796 int lmac = IWL_LMAC_24G_INDEX;
797
798 if (iwl_mvm_is_cdb_supported(mvm) &&
799 band == NL80211_BAND_5GHZ)
800 lmac = IWL_LMAC_5G_INDEX;
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
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 if (WARN_ON_ONCE(IS_ERR(next)))
841 return -EINVAL;
842 else if (next)
843 consume_skb(skb);
844
845 skb_list_walk_safe(next, tmp, next) {
846 memcpy(tmp->cb, cb, sizeof(tmp->cb));
847 /*
848 * Compute the length of all the data added for the A-MSDU.
849 * This will be used to compute the length to write in the TX
850 * command. We have: SNAP + IP + TCP for n -1 subframes and
851 * ETH header for n subframes.
852 */
853 tcp_payload_len = skb_tail_pointer(tmp) -
854 skb_transport_header(tmp) -
855 tcp_hdrlen(tmp) + tmp->data_len;
856
857 if (ipv4)
858 ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes);
859
860 if (tcp_payload_len > mss) {
861 skb_shinfo(tmp)->gso_size = mss;
862 } else {
863 if (qos) {
864 u8 *qc;
865
866 if (ipv4)
867 ip_send_check(ip_hdr(tmp));
868
869 qc = ieee80211_get_qos_ctl((void *)tmp->data);
870 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
871 }
872 skb_shinfo(tmp)->gso_size = 0;
873 }
874
875 skb_mark_not_on_list(tmp);
876 __skb_queue_tail(mpdus_skb, tmp);
877 i++;
878 }
879
880 return 0;
881 }
882
883 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
884 struct ieee80211_tx_info *info,
885 struct ieee80211_sta *sta,
886 struct sk_buff_head *mpdus_skb)
887 {
888 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
889 struct ieee80211_hdr *hdr = (void *)skb->data;
890 unsigned int mss = skb_shinfo(skb)->gso_size;
891 unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len;
892 u16 snap_ip_tcp, pad;
893 netdev_features_t netdev_flags = NETIF_F_CSUM_MASK | NETIF_F_SG;
894 u8 tid;
895
896 snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) +
897 tcp_hdrlen(skb);
898
899 if (!mvmsta->max_amsdu_len ||
900 !ieee80211_is_data_qos(hdr->frame_control) ||
901 !mvmsta->amsdu_enabled)
902 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
903
904 /*
905 * Do not build AMSDU for IPv6 with extension headers.
906 * ask stack to segment and checkum the generated MPDUs for us.
907 */
908 if (skb->protocol == htons(ETH_P_IPV6) &&
909 ((struct ipv6hdr *)skb_network_header(skb))->nexthdr !=
910 IPPROTO_TCP) {
911 netdev_flags &= ~NETIF_F_CSUM_MASK;
912 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
913 }
914
915 tid = ieee80211_get_tid(hdr);
916 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
917 return -EINVAL;
918
919 /*
920 * No need to lock amsdu_in_ampdu_allowed since it can't be modified
921 * during an BA session.
922 */
923 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
924 !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed)
925 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
926
927 if (iwl_mvm_vif_low_latency(iwl_mvm_vif_from_mac80211(mvmsta->vif)) ||
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 */
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 */
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
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
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 */
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_probe_resp(fc)))
1093 iwl_mvm_probe_resp_set_noa(mvm, skb);
1094
1095 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen,
1096 sta, mvmsta->sta_id);
1097 if (!dev_cmd)
1098 goto drop;
1099
1100 /*
1101 * we handle that entirely ourselves -- for uAPSD the firmware
1102 * will always send a notification, and for PS-Poll responses
1103 * we'll notify mac80211 when getting frame status
1104 */
1105 info->flags &= ~IEEE80211_TX_STATUS_EOSP;
1106
1107 spin_lock(&mvmsta->lock);
1108
1109 /* nullfunc frames should go to the MGMT queue regardless of QOS,
1110 * the condition of !ieee80211_is_qos_nullfunc(fc) keeps the default
1111 * assignment of MGMT TID
1112 */
1113 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
1114 tid = ieee80211_get_tid(hdr);
1115 if (WARN_ONCE(tid >= IWL_MAX_TID_COUNT, "Invalid TID %d", tid))
1116 goto drop_unlock_sta;
1117
1118 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU;
1119 if (WARN_ONCE(is_ampdu &&
1120 mvmsta->tid_data[tid].state != IWL_AGG_ON,
1121 "Invalid internal agg state %d for TID %d",
1122 mvmsta->tid_data[tid].state, tid))
1123 goto drop_unlock_sta;
1124
1125 seq_number = mvmsta->tid_data[tid].seq_number;
1126 seq_number &= IEEE80211_SCTL_SEQ;
1127
1128 if (!iwl_mvm_has_new_tx_api(mvm)) {
1129 struct iwl_tx_cmd *tx_cmd = (void *)dev_cmd->payload;
1130
1131 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
1132 hdr->seq_ctrl |= cpu_to_le16(seq_number);
1133 /* update the tx_cmd hdr as it was already copied */
1134 tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl;
1135 }
1136 } else if (ieee80211_is_data(fc) && !ieee80211_is_data_qos(fc)) {
1137 tid = IWL_TID_NON_QOS;
1138 }
1139
1140 txq_id = mvmsta->tid_data[tid].txq_id;
1141
1142 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
1143
1144 if (WARN_ONCE(txq_id == IWL_MVM_INVALID_QUEUE, "Invalid TXQ id")) {
1145 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1146 spin_unlock(&mvmsta->lock);
1147 return -1;
1148 }
1149
1150 if (!iwl_mvm_has_new_tx_api(mvm)) {
1151 /* Keep track of the time of the last frame for this RA/TID */
1152 mvm->queue_info[txq_id].last_frame_time[tid] = jiffies;
1153
1154 /*
1155 * If we have timed-out TIDs - schedule the worker that will
1156 * reconfig the queues and update them
1157 *
1158 * Note that the no lock is taken here in order to not serialize
1159 * the TX flow. This isn't dangerous because scheduling
1160 * mvm->add_stream_wk can't ruin the state, and if we DON'T
1161 * schedule it due to some race condition then next TX we get
1162 * here we will.
1163 */
1164 if (unlikely(mvm->queue_info[txq_id].status ==
1165 IWL_MVM_QUEUE_SHARED &&
1166 iwl_mvm_txq_should_update(mvm, txq_id)))
1167 schedule_work(&mvm->add_stream_wk);
1168 }
1169
1170 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x len %d\n",
1171 mvmsta->sta_id, tid, txq_id,
1172 IEEE80211_SEQ_TO_SN(seq_number), skb->len);
1173
1174 /* From now on, we cannot access info->control */
1175 iwl_mvm_skb_prepare_status(skb, dev_cmd);
1176
1177 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id))
1178 goto drop_unlock_sta;
1179
1180 if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc))
1181 mvmsta->tid_data[tid].seq_number = seq_number + 0x10;
1182
1183 spin_unlock(&mvmsta->lock);
1184
1185 if (iwl_mvm_tx_pkt_queued(mvm, mvmsta,
1186 tid == IWL_MAX_TID_COUNT ? 0 : tid))
1187 goto drop;
1188
1189 return 0;
1190
1191 drop_unlock_sta:
1192 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1193 spin_unlock(&mvmsta->lock);
1194 drop:
1195 IWL_DEBUG_TX(mvm, "TX to [%d|%d] dropped\n", mvmsta->sta_id, tid);
1196 return -1;
1197 }
1198
1199 int iwl_mvm_tx_skb_sta(struct iwl_mvm *mvm, struct sk_buff *skb,
1200 struct ieee80211_sta *sta)
1201 {
1202 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1203 struct ieee80211_tx_info info;
1204 struct sk_buff_head mpdus_skbs;
1205 unsigned int payload_len;
1206 int ret;
1207
1208 if (WARN_ON_ONCE(!mvmsta))
1209 return -1;
1210
1211 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA))
1212 return -1;
1213
1214 memcpy(&info, skb->cb, sizeof(info));
1215
1216 if (!skb_is_gso(skb))
1217 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1218
1219 payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
1220 tcp_hdrlen(skb) + skb->data_len;
1221
1222 if (payload_len <= skb_shinfo(skb)->gso_size)
1223 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1224
1225 __skb_queue_head_init(&mpdus_skbs);
1226
1227 ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs);
1228 if (ret)
1229 return ret;
1230
1231 if (WARN_ON(skb_queue_empty(&mpdus_skbs)))
1232 return ret;
1233
1234 while (!skb_queue_empty(&mpdus_skbs)) {
1235 skb = __skb_dequeue(&mpdus_skbs);
1236
1237 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1238 if (ret) {
1239 __skb_queue_purge(&mpdus_skbs);
1240 return ret;
1241 }
1242 }
1243
1244 return 0;
1245 }
1246
1247 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm,
1248 struct ieee80211_sta *sta, u8 tid)
1249 {
1250 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1251 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1252 struct ieee80211_vif *vif = mvmsta->vif;
1253 u16 normalized_ssn;
1254
1255 lockdep_assert_held(&mvmsta->lock);
1256
1257 if ((tid_data->state == IWL_AGG_ON ||
1258 tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) &&
1259 iwl_mvm_tid_queued(mvm, tid_data) == 0) {
1260 /*
1261 * Now that this aggregation or DQA queue is empty tell
1262 * mac80211 so it knows we no longer have frames buffered for
1263 * the station on this TID (for the TIM bitmap calculation.)
1264 */
1265 ieee80211_sta_set_buffered(sta, tid, false);
1266 }
1267
1268 /*
1269 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
1270 * to align the wrap around of ssn so we compare relevant values.
1271 */
1272 normalized_ssn = tid_data->ssn;
1273 if (mvm->trans->trans_cfg->gen2)
1274 normalized_ssn &= 0xff;
1275
1276 if (normalized_ssn != tid_data->next_reclaimed)
1277 return;
1278
1279 switch (tid_data->state) {
1280 case IWL_EMPTYING_HW_QUEUE_ADDBA:
1281 IWL_DEBUG_TX_QUEUES(mvm,
1282 "Can continue addBA flow ssn = next_recl = %d\n",
1283 tid_data->next_reclaimed);
1284 tid_data->state = IWL_AGG_STARTING;
1285 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1286 break;
1287
1288 case IWL_EMPTYING_HW_QUEUE_DELBA:
1289 IWL_DEBUG_TX_QUEUES(mvm,
1290 "Can continue DELBA flow ssn = next_recl = %d\n",
1291 tid_data->next_reclaimed);
1292 tid_data->state = IWL_AGG_OFF;
1293 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1294 break;
1295
1296 default:
1297 break;
1298 }
1299 }
1300
1301 #ifdef CONFIG_IWLWIFI_DEBUG
1302 const char *iwl_mvm_get_tx_fail_reason(u32 status)
1303 {
1304 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
1305 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
1306
1307 switch (status & TX_STATUS_MSK) {
1308 case TX_STATUS_SUCCESS:
1309 return "SUCCESS";
1310 TX_STATUS_POSTPONE(DELAY);
1311 TX_STATUS_POSTPONE(FEW_BYTES);
1312 TX_STATUS_POSTPONE(BT_PRIO);
1313 TX_STATUS_POSTPONE(QUIET_PERIOD);
1314 TX_STATUS_POSTPONE(CALC_TTAK);
1315 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
1316 TX_STATUS_FAIL(SHORT_LIMIT);
1317 TX_STATUS_FAIL(LONG_LIMIT);
1318 TX_STATUS_FAIL(UNDERRUN);
1319 TX_STATUS_FAIL(DRAIN_FLOW);
1320 TX_STATUS_FAIL(RFKILL_FLUSH);
1321 TX_STATUS_FAIL(LIFE_EXPIRE);
1322 TX_STATUS_FAIL(DEST_PS);
1323 TX_STATUS_FAIL(HOST_ABORTED);
1324 TX_STATUS_FAIL(BT_RETRY);
1325 TX_STATUS_FAIL(STA_INVALID);
1326 TX_STATUS_FAIL(FRAG_DROPPED);
1327 TX_STATUS_FAIL(TID_DISABLE);
1328 TX_STATUS_FAIL(FIFO_FLUSHED);
1329 TX_STATUS_FAIL(SMALL_CF_POLL);
1330 TX_STATUS_FAIL(FW_DROP);
1331 TX_STATUS_FAIL(STA_COLOR_MISMATCH);
1332 }
1333
1334 return "UNKNOWN";
1335
1336 #undef TX_STATUS_FAIL
1337 #undef TX_STATUS_POSTPONE
1338 }
1339 #endif /* CONFIG_IWLWIFI_DEBUG */
1340
1341 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags,
1342 enum nl80211_band band,
1343 struct ieee80211_tx_rate *r)
1344 {
1345 if (rate_n_flags & RATE_HT_MCS_GF_MSK)
1346 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
1347 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
1348 case RATE_MCS_CHAN_WIDTH_20:
1349 break;
1350 case RATE_MCS_CHAN_WIDTH_40:
1351 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
1352 break;
1353 case RATE_MCS_CHAN_WIDTH_80:
1354 r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH;
1355 break;
1356 case RATE_MCS_CHAN_WIDTH_160:
1357 r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH;
1358 break;
1359 }
1360 if (rate_n_flags & RATE_MCS_SGI_MSK)
1361 r->flags |= IEEE80211_TX_RC_SHORT_GI;
1362 if (rate_n_flags & RATE_MCS_HT_MSK) {
1363 r->flags |= IEEE80211_TX_RC_MCS;
1364 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
1365 } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
1366 ieee80211_rate_set_vht(
1367 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK,
1368 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
1369 RATE_VHT_MCS_NSS_POS) + 1);
1370 r->flags |= IEEE80211_TX_RC_VHT_MCS;
1371 } else {
1372 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
1373 band);
1374 }
1375 }
1376
1377 /**
1378 * translate ucode response to mac80211 tx status control values
1379 */
1380 static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags,
1381 struct ieee80211_tx_info *info)
1382 {
1383 struct ieee80211_tx_rate *r = &info->status.rates[0];
1384
1385 info->status.antenna =
1386 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
1387 iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r);
1388 }
1389
1390 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm,
1391 u32 status)
1392 {
1393 struct iwl_fw_dbg_trigger_tlv *trig;
1394 struct iwl_fw_dbg_trigger_tx_status *status_trig;
1395 int i;
1396
1397 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL,
1398 FW_DBG_TRIGGER_TX_STATUS);
1399 if (!trig)
1400 return;
1401
1402 status_trig = (void *)trig->data;
1403
1404 for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) {
1405 /* don't collect on status 0 */
1406 if (!status_trig->statuses[i].status)
1407 break;
1408
1409 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK))
1410 continue;
1411
1412 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
1413 "Tx status %d was received",
1414 status & TX_STATUS_MSK);
1415 break;
1416 }
1417 }
1418
1419 /**
1420 * iwl_mvm_get_scd_ssn - returns the SSN of the SCD
1421 * @tx_resp: the Tx response from the fw (agg or non-agg)
1422 *
1423 * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since
1424 * it can't know that everything will go well until the end of the AMPDU, it
1425 * can't know in advance the number of MPDUs that will be sent in the current
1426 * batch. This is why it writes the agg Tx response while it fetches the MPDUs.
1427 * Hence, it can't know in advance what the SSN of the SCD will be at the end
1428 * of the batch. This is why the SSN of the SCD is written at the end of the
1429 * whole struct at a variable offset. This function knows how to cope with the
1430 * variable offset and returns the SSN of the SCD.
1431 */
1432 static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm,
1433 struct iwl_mvm_tx_resp *tx_resp)
1434 {
1435 return le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) +
1436 tx_resp->frame_count) & 0xfff;
1437 }
1438
1439 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm,
1440 struct iwl_rx_packet *pkt)
1441 {
1442 struct ieee80211_sta *sta;
1443 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1444 int txq_id = SEQ_TO_QUEUE(sequence);
1445 /* struct iwl_mvm_tx_resp_v3 is almost the same */
1446 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1447 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1448 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1449 struct agg_tx_status *agg_status =
1450 iwl_mvm_get_agg_status(mvm, tx_resp);
1451 u32 status = le16_to_cpu(agg_status->status);
1452 u16 ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp);
1453 struct sk_buff_head skbs;
1454 u8 skb_freed = 0;
1455 u8 lq_color;
1456 u16 next_reclaimed, seq_ctl;
1457 bool is_ndp = false;
1458
1459 __skb_queue_head_init(&skbs);
1460
1461 if (iwl_mvm_has_new_tx_api(mvm))
1462 txq_id = le16_to_cpu(tx_resp->tx_queue);
1463
1464 seq_ctl = le16_to_cpu(tx_resp->seq_ctl);
1465
1466 /* we can free until ssn % q.n_bd not inclusive */
1467 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs);
1468
1469 while (!skb_queue_empty(&skbs)) {
1470 struct sk_buff *skb = __skb_dequeue(&skbs);
1471 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1472 struct ieee80211_hdr *hdr = (void *)skb->data;
1473 bool flushed = false;
1474
1475 skb_freed++;
1476
1477 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1478
1479 memset(&info->status, 0, sizeof(info->status));
1480
1481 /* inform mac80211 about what happened with the frame */
1482 switch (status & TX_STATUS_MSK) {
1483 case TX_STATUS_SUCCESS:
1484 case TX_STATUS_DIRECT_DONE:
1485 info->flags |= IEEE80211_TX_STAT_ACK;
1486 break;
1487 case TX_STATUS_FAIL_FIFO_FLUSHED:
1488 case TX_STATUS_FAIL_DRAIN_FLOW:
1489 flushed = true;
1490 break;
1491 case TX_STATUS_FAIL_DEST_PS:
1492 /* the FW should have stopped the queue and not
1493 * return this status
1494 */
1495 WARN_ON(1);
1496 info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
1497 break;
1498 default:
1499 break;
1500 }
1501
1502 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS &&
1503 ieee80211_is_mgmt(hdr->frame_control))
1504 iwl_mvm_toggle_tx_ant(mvm, &mvm->mgmt_last_antenna_idx);
1505
1506 /*
1507 * If we are freeing multiple frames, mark all the frames
1508 * but the first one as acked, since they were acknowledged
1509 * before
1510 * */
1511 if (skb_freed > 1)
1512 info->flags |= IEEE80211_TX_STAT_ACK;
1513
1514 iwl_mvm_tx_status_check_trigger(mvm, status);
1515
1516 info->status.rates[0].count = tx_resp->failure_frame + 1;
1517 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate),
1518 info);
1519 info->status.status_driver_data[1] =
1520 (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate);
1521
1522 /* Single frame failure in an AMPDU queue => send BAR */
1523 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
1524 !(info->flags & IEEE80211_TX_STAT_ACK) &&
1525 !(info->flags & IEEE80211_TX_STAT_TX_FILTERED) && !flushed)
1526 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1527 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1528
1529 /* W/A FW bug: seq_ctl is wrong upon failure / BAR frame */
1530 if (ieee80211_is_back_req(hdr->frame_control))
1531 seq_ctl = 0;
1532 else if (status != TX_STATUS_SUCCESS)
1533 seq_ctl = le16_to_cpu(hdr->seq_ctrl);
1534
1535 if (unlikely(!seq_ctl)) {
1536 struct ieee80211_hdr *hdr = (void *)skb->data;
1537
1538 /*
1539 * If it is an NDP, we can't update next_reclaim since
1540 * its sequence control is 0. Note that for that same
1541 * reason, NDPs are never sent to A-MPDU'able queues
1542 * so that we can never have more than one freed frame
1543 * for a single Tx resonse (see WARN_ON below).
1544 */
1545 if (ieee80211_is_qos_nullfunc(hdr->frame_control))
1546 is_ndp = true;
1547 }
1548
1549 /*
1550 * TODO: this is not accurate if we are freeing more than one
1551 * packet.
1552 */
1553 info->status.tx_time =
1554 le16_to_cpu(tx_resp->wireless_media_time);
1555 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1);
1556 lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info);
1557 info->status.status_driver_data[0] =
1558 RS_DRV_DATA_PACK(lq_color, tx_resp->reduced_tpc);
1559
1560 ieee80211_tx_status(mvm->hw, skb);
1561 }
1562
1563 /* This is an aggregation queue or might become one, so we use
1564 * the ssn since: ssn = wifi seq_num % 256.
1565 * The seq_ctl is the sequence control of the packet to which
1566 * this Tx response relates. But if there is a hole in the
1567 * bitmap of the BA we received, this Tx response may allow to
1568 * reclaim the hole and all the subsequent packets that were
1569 * already acked. In that case, seq_ctl != ssn, and the next
1570 * packet to be reclaimed will be ssn and not seq_ctl. In that
1571 * case, several packets will be reclaimed even if
1572 * frame_count = 1.
1573 *
1574 * The ssn is the index (% 256) of the latest packet that has
1575 * treated (acked / dropped) + 1.
1576 */
1577 next_reclaimed = ssn;
1578
1579 IWL_DEBUG_TX_REPLY(mvm,
1580 "TXQ %d status %s (0x%08x)\n",
1581 txq_id, iwl_mvm_get_tx_fail_reason(status), status);
1582
1583 IWL_DEBUG_TX_REPLY(mvm,
1584 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
1585 le32_to_cpu(tx_resp->initial_rate),
1586 tx_resp->failure_frame, SEQ_TO_INDEX(sequence),
1587 ssn, next_reclaimed, seq_ctl);
1588
1589 rcu_read_lock();
1590
1591 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1592 /*
1593 * sta can't be NULL otherwise it'd mean that the sta has been freed in
1594 * the firmware while we still have packets for it in the Tx queues.
1595 */
1596 if (WARN_ON_ONCE(!sta))
1597 goto out;
1598
1599 if (!IS_ERR(sta)) {
1600 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1601
1602 iwl_mvm_tx_airtime(mvm, mvmsta,
1603 le16_to_cpu(tx_resp->wireless_media_time));
1604
1605 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS &&
1606 mvmsta->sta_state < IEEE80211_STA_AUTHORIZED)
1607 iwl_mvm_toggle_tx_ant(mvm, &mvmsta->tx_ant);
1608
1609 if (sta->wme && tid != IWL_MGMT_TID) {
1610 struct iwl_mvm_tid_data *tid_data =
1611 &mvmsta->tid_data[tid];
1612 bool send_eosp_ndp = false;
1613
1614 spin_lock_bh(&mvmsta->lock);
1615
1616 if (!is_ndp) {
1617 tid_data->next_reclaimed = next_reclaimed;
1618 IWL_DEBUG_TX_REPLY(mvm,
1619 "Next reclaimed packet:%d\n",
1620 next_reclaimed);
1621 } else {
1622 IWL_DEBUG_TX_REPLY(mvm,
1623 "NDP - don't update next_reclaimed\n");
1624 }
1625
1626 iwl_mvm_check_ratid_empty(mvm, sta, tid);
1627
1628 if (mvmsta->sleep_tx_count) {
1629 mvmsta->sleep_tx_count--;
1630 if (mvmsta->sleep_tx_count &&
1631 !iwl_mvm_tid_queued(mvm, tid_data)) {
1632 /*
1633 * The number of frames in the queue
1634 * dropped to 0 even if we sent less
1635 * frames than we thought we had on the
1636 * Tx queue.
1637 * This means we had holes in the BA
1638 * window that we just filled, ask
1639 * mac80211 to send EOSP since the
1640 * firmware won't know how to do that.
1641 * Send NDP and the firmware will send
1642 * EOSP notification that will trigger
1643 * a call to ieee80211_sta_eosp().
1644 */
1645 send_eosp_ndp = true;
1646 }
1647 }
1648
1649 spin_unlock_bh(&mvmsta->lock);
1650 if (send_eosp_ndp) {
1651 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta,
1652 IEEE80211_FRAME_RELEASE_UAPSD,
1653 1, tid, false, false);
1654 mvmsta->sleep_tx_count = 0;
1655 ieee80211_send_eosp_nullfunc(sta, tid);
1656 }
1657 }
1658
1659 if (mvmsta->next_status_eosp) {
1660 mvmsta->next_status_eosp = false;
1661 ieee80211_sta_eosp(sta);
1662 }
1663 }
1664 out:
1665 rcu_read_unlock();
1666 }
1667
1668 #ifdef CONFIG_IWLWIFI_DEBUG
1669 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
1670 static const char *iwl_get_agg_tx_status(u16 status)
1671 {
1672 switch (status & AGG_TX_STATE_STATUS_MSK) {
1673 AGG_TX_STATE_(TRANSMITTED);
1674 AGG_TX_STATE_(UNDERRUN);
1675 AGG_TX_STATE_(BT_PRIO);
1676 AGG_TX_STATE_(FEW_BYTES);
1677 AGG_TX_STATE_(ABORT);
1678 AGG_TX_STATE_(TX_ON_AIR_DROP);
1679 AGG_TX_STATE_(LAST_SENT_TRY_CNT);
1680 AGG_TX_STATE_(LAST_SENT_BT_KILL);
1681 AGG_TX_STATE_(SCD_QUERY);
1682 AGG_TX_STATE_(TEST_BAD_CRC32);
1683 AGG_TX_STATE_(RESPONSE);
1684 AGG_TX_STATE_(DUMP_TX);
1685 AGG_TX_STATE_(DELAY_TX);
1686 }
1687
1688 return "UNKNOWN";
1689 }
1690
1691 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1692 struct iwl_rx_packet *pkt)
1693 {
1694 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1695 struct agg_tx_status *frame_status =
1696 iwl_mvm_get_agg_status(mvm, tx_resp);
1697 int i;
1698
1699 for (i = 0; i < tx_resp->frame_count; i++) {
1700 u16 fstatus = le16_to_cpu(frame_status[i].status);
1701
1702 IWL_DEBUG_TX_REPLY(mvm,
1703 "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
1704 iwl_get_agg_tx_status(fstatus),
1705 fstatus & AGG_TX_STATE_STATUS_MSK,
1706 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >>
1707 AGG_TX_STATE_TRY_CNT_POS,
1708 le16_to_cpu(frame_status[i].sequence));
1709 }
1710 }
1711 #else
1712 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1713 struct iwl_rx_packet *pkt)
1714 {}
1715 #endif /* CONFIG_IWLWIFI_DEBUG */
1716
1717 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm,
1718 struct iwl_rx_packet *pkt)
1719 {
1720 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1721 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1722 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1723 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1724 struct iwl_mvm_sta *mvmsta;
1725 int queue = SEQ_TO_QUEUE(sequence);
1726 struct ieee80211_sta *sta;
1727
1728 if (WARN_ON_ONCE(queue < IWL_MVM_DQA_MIN_DATA_QUEUE &&
1729 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)))
1730 return;
1731
1732 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt);
1733
1734 rcu_read_lock();
1735
1736 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1737
1738 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1739 if (WARN_ON_ONCE(!sta || !sta->wme)) {
1740 rcu_read_unlock();
1741 return;
1742 }
1743
1744 if (!WARN_ON_ONCE(!mvmsta)) {
1745 mvmsta->tid_data[tid].rate_n_flags =
1746 le32_to_cpu(tx_resp->initial_rate);
1747 mvmsta->tid_data[tid].tx_time =
1748 le16_to_cpu(tx_resp->wireless_media_time);
1749 mvmsta->tid_data[tid].lq_color =
1750 TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info);
1751 iwl_mvm_tx_airtime(mvm, mvmsta,
1752 le16_to_cpu(tx_resp->wireless_media_time));
1753 }
1754
1755 rcu_read_unlock();
1756 }
1757
1758 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1759 {
1760 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1761 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1762
1763 if (tx_resp->frame_count == 1)
1764 iwl_mvm_rx_tx_cmd_single(mvm, pkt);
1765 else
1766 iwl_mvm_rx_tx_cmd_agg(mvm, pkt);
1767 }
1768
1769 static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid,
1770 int txq, int index,
1771 struct ieee80211_tx_info *ba_info, u32 rate)
1772 {
1773 struct sk_buff_head reclaimed_skbs;
1774 struct iwl_mvm_tid_data *tid_data;
1775 struct ieee80211_sta *sta;
1776 struct iwl_mvm_sta *mvmsta;
1777 struct sk_buff *skb;
1778 int freed;
1779
1780 if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT ||
1781 tid > IWL_MAX_TID_COUNT,
1782 "sta_id %d tid %d", sta_id, tid))
1783 return;
1784
1785 rcu_read_lock();
1786
1787 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1788
1789 /* Reclaiming frames for a station that has been deleted ? */
1790 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
1791 rcu_read_unlock();
1792 return;
1793 }
1794
1795 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1796 tid_data = &mvmsta->tid_data[tid];
1797
1798 if (tid_data->txq_id != txq) {
1799 IWL_ERR(mvm,
1800 "invalid BA notification: Q %d, tid %d\n",
1801 tid_data->txq_id, tid);
1802 rcu_read_unlock();
1803 return;
1804 }
1805
1806 __skb_queue_head_init(&reclaimed_skbs);
1807
1808 /*
1809 * Release all TFDs before the SSN, i.e. all TFDs in front of
1810 * block-ack window (we assume that they've been successfully
1811 * transmitted ... if not, it's too late anyway).
1812 */
1813 iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs);
1814
1815 spin_lock_bh(&mvmsta->lock);
1816
1817 tid_data->next_reclaimed = index;
1818
1819 iwl_mvm_check_ratid_empty(mvm, sta, tid);
1820
1821 freed = 0;
1822
1823 /* pack lq color from tid_data along the reduced txp */
1824 ba_info->status.status_driver_data[0] =
1825 RS_DRV_DATA_PACK(tid_data->lq_color,
1826 ba_info->status.status_driver_data[0]);
1827 ba_info->status.status_driver_data[1] = (void *)(uintptr_t)rate;
1828
1829 skb_queue_walk(&reclaimed_skbs, skb) {
1830 struct ieee80211_hdr *hdr = (void *)skb->data;
1831 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1832
1833 if (ieee80211_is_data_qos(hdr->frame_control))
1834 freed++;
1835 else
1836 WARN_ON_ONCE(tid != IWL_MAX_TID_COUNT);
1837
1838 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1839
1840 memset(&info->status, 0, sizeof(info->status));
1841 /* Packet was transmitted successfully, failures come as single
1842 * frames because before failing a frame the firmware transmits
1843 * it without aggregation at least once.
1844 */
1845 info->flags |= IEEE80211_TX_STAT_ACK;
1846
1847 /* this is the first skb we deliver in this batch */
1848 /* put the rate scaling data there */
1849 if (freed == 1) {
1850 info->flags |= IEEE80211_TX_STAT_AMPDU;
1851 memcpy(&info->status, &ba_info->status,
1852 sizeof(ba_info->status));
1853 iwl_mvm_hwrate_to_tx_status(rate, info);
1854 }
1855 }
1856
1857 spin_unlock_bh(&mvmsta->lock);
1858
1859 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is
1860 * possible (i.e. first MPDU in the aggregation wasn't acked)
1861 * Still it's important to update RS about sent vs. acked.
1862 */
1863 if (skb_queue_empty(&reclaimed_skbs)) {
1864 struct ieee80211_chanctx_conf *chanctx_conf = NULL;
1865
1866 if (mvmsta->vif)
1867 chanctx_conf =
1868 rcu_dereference(mvmsta->vif->chanctx_conf);
1869
1870 if (WARN_ON_ONCE(!chanctx_conf))
1871 goto out;
1872
1873 ba_info->band = chanctx_conf->def.chan->band;
1874 iwl_mvm_hwrate_to_tx_status(rate, ba_info);
1875
1876 if (!iwl_mvm_has_tlc_offload(mvm)) {
1877 IWL_DEBUG_TX_REPLY(mvm,
1878 "No reclaim. Update rs directly\n");
1879 iwl_mvm_rs_tx_status(mvm, sta, tid, ba_info, false);
1880 }
1881 }
1882
1883 out:
1884 rcu_read_unlock();
1885
1886 while (!skb_queue_empty(&reclaimed_skbs)) {
1887 skb = __skb_dequeue(&reclaimed_skbs);
1888 ieee80211_tx_status(mvm->hw, skb);
1889 }
1890 }
1891
1892 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1893 {
1894 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1895 int sta_id, tid, txq, index;
1896 struct ieee80211_tx_info ba_info = {};
1897 struct iwl_mvm_ba_notif *ba_notif;
1898 struct iwl_mvm_tid_data *tid_data;
1899 struct iwl_mvm_sta *mvmsta;
1900
1901 ba_info.flags = IEEE80211_TX_STAT_AMPDU;
1902
1903 if (iwl_mvm_has_new_tx_api(mvm)) {
1904 struct iwl_mvm_compressed_ba_notif *ba_res =
1905 (void *)pkt->data;
1906 u8 lq_color = TX_RES_RATE_TABLE_COL_GET(ba_res->tlc_rate_info);
1907 int i;
1908
1909 sta_id = ba_res->sta_id;
1910 ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done);
1911 ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed);
1912 ba_info.status.tx_time =
1913 (u16)le32_to_cpu(ba_res->wireless_time);
1914 ba_info.status.status_driver_data[0] =
1915 (void *)(uintptr_t)ba_res->reduced_txp;
1916
1917 if (!le16_to_cpu(ba_res->tfd_cnt))
1918 goto out;
1919
1920 rcu_read_lock();
1921
1922 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1923 if (!mvmsta)
1924 goto out_unlock;
1925
1926 /* Free per TID */
1927 for (i = 0; i < le16_to_cpu(ba_res->tfd_cnt); i++) {
1928 struct iwl_mvm_compressed_ba_tfd *ba_tfd =
1929 &ba_res->tfd[i];
1930
1931 tid = ba_tfd->tid;
1932 if (tid == IWL_MGMT_TID)
1933 tid = IWL_MAX_TID_COUNT;
1934
1935 mvmsta->tid_data[i].lq_color = lq_color;
1936 iwl_mvm_tx_reclaim(mvm, sta_id, tid,
1937 (int)(le16_to_cpu(ba_tfd->q_num)),
1938 le16_to_cpu(ba_tfd->tfd_index),
1939 &ba_info,
1940 le32_to_cpu(ba_res->tx_rate));
1941 }
1942
1943 iwl_mvm_tx_airtime(mvm, mvmsta,
1944 le32_to_cpu(ba_res->wireless_time));
1945 out_unlock:
1946 rcu_read_unlock();
1947 out:
1948 IWL_DEBUG_TX_REPLY(mvm,
1949 "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n",
1950 sta_id, le32_to_cpu(ba_res->flags),
1951 le16_to_cpu(ba_res->txed),
1952 le16_to_cpu(ba_res->done));
1953 return;
1954 }
1955
1956 ba_notif = (void *)pkt->data;
1957 sta_id = ba_notif->sta_id;
1958 tid = ba_notif->tid;
1959 /* "flow" corresponds to Tx queue */
1960 txq = le16_to_cpu(ba_notif->scd_flow);
1961 /* "ssn" is start of block-ack Tx window, corresponds to index
1962 * (in Tx queue's circular buffer) of first TFD/frame in window */
1963 index = le16_to_cpu(ba_notif->scd_ssn);
1964
1965 rcu_read_lock();
1966 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1967 if (WARN_ON_ONCE(!mvmsta)) {
1968 rcu_read_unlock();
1969 return;
1970 }
1971
1972 tid_data = &mvmsta->tid_data[tid];
1973
1974 ba_info.status.ampdu_ack_len = ba_notif->txed_2_done;
1975 ba_info.status.ampdu_len = ba_notif->txed;
1976 ba_info.status.tx_time = tid_data->tx_time;
1977 ba_info.status.status_driver_data[0] =
1978 (void *)(uintptr_t)ba_notif->reduced_txp;
1979
1980 rcu_read_unlock();
1981
1982 iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info,
1983 tid_data->rate_n_flags);
1984
1985 IWL_DEBUG_TX_REPLY(mvm,
1986 "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
1987 ba_notif->sta_addr, ba_notif->sta_id);
1988
1989 IWL_DEBUG_TX_REPLY(mvm,
1990 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
1991 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl),
1992 le64_to_cpu(ba_notif->bitmap), txq, index,
1993 ba_notif->txed, ba_notif->txed_2_done);
1994
1995 IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n",
1996 ba_notif->reduced_txp);
1997 }
1998
1999 /*
2000 * Note that there are transports that buffer frames before they reach
2001 * the firmware. This means that after flush_tx_path is called, the
2002 * queue might not be empty. The race-free way to handle this is to:
2003 * 1) set the station as draining
2004 * 2) flush the Tx path
2005 * 3) wait for the transport queues to be empty
2006 */
2007 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, u32 flags)
2008 {
2009 int ret;
2010 struct iwl_tx_path_flush_cmd_v1 flush_cmd = {
2011 .queues_ctl = cpu_to_le32(tfd_msk),
2012 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH),
2013 };
2014
2015 WARN_ON(iwl_mvm_has_new_tx_api(mvm));
2016
2017 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags,
2018 sizeof(flush_cmd), &flush_cmd);
2019 if (ret)
2020 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
2021 return ret;
2022 }
2023
2024 int iwl_mvm_flush_sta_tids(struct iwl_mvm *mvm, u32 sta_id,
2025 u16 tids, u32 flags)
2026 {
2027 int ret;
2028 struct iwl_tx_path_flush_cmd flush_cmd = {
2029 .sta_id = cpu_to_le32(sta_id),
2030 .tid_mask = cpu_to_le16(tids),
2031 };
2032
2033 WARN_ON(!iwl_mvm_has_new_tx_api(mvm));
2034
2035 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags,
2036 sizeof(flush_cmd), &flush_cmd);
2037 if (ret)
2038 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
2039 return ret;
2040 }
2041
2042 int iwl_mvm_flush_sta(struct iwl_mvm *mvm, void *sta, bool internal, u32 flags)
2043 {
2044 struct iwl_mvm_int_sta *int_sta = sta;
2045 struct iwl_mvm_sta *mvm_sta = sta;
2046
2047 BUILD_BUG_ON(offsetof(struct iwl_mvm_int_sta, sta_id) !=
2048 offsetof(struct iwl_mvm_sta, sta_id));
2049
2050 if (iwl_mvm_has_new_tx_api(mvm))
2051 return iwl_mvm_flush_sta_tids(mvm, mvm_sta->sta_id,
2052 0xffff, flags);
2053
2054 if (internal)
2055 return iwl_mvm_flush_tx_path(mvm, int_sta->tfd_queue_msk,
2056 flags);
2057
2058 return iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, flags);
2059 }
Linux with added FPC-III support