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1// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2/*
3 * Copyright (C) 2012-2014, 2018-2023 Intel Corporation
4 * Copyright (C) 2013-2015 Intel Mobile Communications GmbH
5 * Copyright (C) 2016-2017 Intel Deutschland GmbH
6 */
7#include <linux/ieee80211.h>
8#include <linux/etherdevice.h>
9#include <linux/tcp.h>
10#include <net/gso.h>
11#include <net/ip.h>
12#include <net/ipv6.h>
13
14#include "iwl-trans.h"
15#include "iwl-eeprom-parse.h"
16#include "mvm.h"
17#include "sta.h"
18#include "time-sync.h"
19
20static void
21iwl_mvm_bar_check_trigger(struct iwl_mvm *mvm, const u8 *addr,
22 u16 tid, u16 ssn)
23{
24 struct iwl_fw_dbg_trigger_tlv *trig;
25 struct iwl_fw_dbg_trigger_ba *ba_trig;
26
27 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, FW_DBG_TRIGGER_BA);
28 if (!trig)
29 return;
30
31 ba_trig = (void *)trig->data;
32
33 if (!(le16_to_cpu(ba_trig->tx_bar) & BIT(tid)))
34 return;
35
36 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
37 "BAR sent to %pM, tid %d, ssn %d",
38 addr, tid, ssn);
39}
40
41#define OPT_HDR(type, skb, off) \
42 (type *)(skb_network_header(skb) + (off))
43
44static u32 iwl_mvm_tx_csum(struct iwl_mvm *mvm, struct sk_buff *skb,
45 struct ieee80211_tx_info *info,
46 bool amsdu)
47{
48 struct ieee80211_hdr *hdr = (void *)skb->data;
49 u16 mh_len = ieee80211_hdrlen(hdr->frame_control);
50 u16 offload_assist = 0;
51#if IS_ENABLED(CONFIG_INET)
52 u8 protocol = 0;
53
54 /* Do not compute checksum if already computed */
55 if (skb->ip_summed != CHECKSUM_PARTIAL)
56 goto out;
57
58 /* We do not expect to be requested to csum stuff we do not support */
59 if (WARN_ONCE(!(mvm->hw->netdev_features & IWL_TX_CSUM_NETIF_FLAGS) ||
60 (skb->protocol != htons(ETH_P_IP) &&
61 skb->protocol != htons(ETH_P_IPV6)),
62 "No support for requested checksum\n")) {
63 skb_checksum_help(skb);
64 goto out;
65 }
66
67 if (skb->protocol == htons(ETH_P_IP)) {
68 protocol = ip_hdr(skb)->protocol;
69 } else {
70#if IS_ENABLED(CONFIG_IPV6)
71 struct ipv6hdr *ipv6h =
72 (struct ipv6hdr *)skb_network_header(skb);
73 unsigned int off = sizeof(*ipv6h);
74
75 protocol = ipv6h->nexthdr;
76 while (protocol != NEXTHDR_NONE && ipv6_ext_hdr(protocol)) {
77 struct ipv6_opt_hdr *hp;
78
79 /* only supported extension headers */
80 if (protocol != NEXTHDR_ROUTING &&
81 protocol != NEXTHDR_HOP &&
82 protocol != NEXTHDR_DEST) {
83 skb_checksum_help(skb);
84 goto out;
85 }
86
87 hp = OPT_HDR(struct ipv6_opt_hdr, skb, off);
88 protocol = hp->nexthdr;
89 off += ipv6_optlen(hp);
90 }
91 /* if we get here - protocol now should be TCP/UDP */
92#endif
93 }
94
95 if (protocol != IPPROTO_TCP && protocol != IPPROTO_UDP) {
96 WARN_ON_ONCE(1);
97 skb_checksum_help(skb);
98 goto out;
99 }
100
101 /* enable L4 csum */
102 offload_assist |= BIT(TX_CMD_OFFLD_L4_EN);
103
104 /*
105 * Set offset to IP header (snap).
106 * We don't support tunneling so no need to take care of inner header.
107 * Size is in words.
108 */
109 offload_assist |= (4 << TX_CMD_OFFLD_IP_HDR);
110
111 /* Do IPv4 csum for AMSDU only (no IP csum for Ipv6) */
112 if (skb->protocol == htons(ETH_P_IP) && amsdu) {
113 ip_hdr(skb)->check = 0;
114 offload_assist |= BIT(TX_CMD_OFFLD_L3_EN);
115 }
116
117 /* reset UDP/TCP header csum */
118 if (protocol == IPPROTO_TCP)
119 tcp_hdr(skb)->check = 0;
120 else
121 udp_hdr(skb)->check = 0;
122
123out:
124#endif
125 /*
126 * mac header len should include IV, size is in words unless
127 * the IV is added by the firmware like in WEP.
128 * In new Tx API, the IV is always added by the firmware.
129 */
130 if (!iwl_mvm_has_new_tx_api(mvm) && info->control.hw_key &&
131 info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP40 &&
132 info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP104)
133 mh_len += info->control.hw_key->iv_len;
134 mh_len /= 2;
135 offload_assist |= mh_len << TX_CMD_OFFLD_MH_SIZE;
136
137 if (amsdu)
138 offload_assist |= BIT(TX_CMD_OFFLD_AMSDU);
139 else if (ieee80211_hdrlen(hdr->frame_control) % 4)
140 /* padding is inserted later in transport */
141 offload_assist |= BIT(TX_CMD_OFFLD_PAD);
142
143 return offload_assist;
144}
145
146/*
147 * Sets most of the Tx cmd's fields
148 */
149void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb,
150 struct iwl_tx_cmd *tx_cmd,
151 struct ieee80211_tx_info *info, u8 sta_id)
152{
153 struct ieee80211_hdr *hdr = (void *)skb->data;
154 __le16 fc = hdr->frame_control;
155 u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags);
156 u32 len = skb->len + FCS_LEN;
157 bool amsdu = false;
158 u8 ac;
159
160 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) ||
161 (ieee80211_is_probe_resp(fc) &&
162 !is_multicast_ether_addr(hdr->addr1)))
163 tx_flags |= TX_CMD_FLG_ACK;
164 else
165 tx_flags &= ~TX_CMD_FLG_ACK;
166
167 if (ieee80211_is_probe_resp(fc))
168 tx_flags |= TX_CMD_FLG_TSF;
169
170 if (ieee80211_has_morefrags(fc))
171 tx_flags |= TX_CMD_FLG_MORE_FRAG;
172
173 if (ieee80211_is_data_qos(fc)) {
174 u8 *qc = ieee80211_get_qos_ctl(hdr);
175 tx_cmd->tid_tspec = qc[0] & 0xf;
176 tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
177 amsdu = *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT;
178 } else if (ieee80211_is_back_req(fc)) {
179 struct ieee80211_bar *bar = (void *)skb->data;
180 u16 control = le16_to_cpu(bar->control);
181 u16 ssn = le16_to_cpu(bar->start_seq_num);
182
183 tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR;
184 tx_cmd->tid_tspec = (control &
185 IEEE80211_BAR_CTRL_TID_INFO_MASK) >>
186 IEEE80211_BAR_CTRL_TID_INFO_SHIFT;
187 WARN_ON_ONCE(tx_cmd->tid_tspec >= IWL_MAX_TID_COUNT);
188 iwl_mvm_bar_check_trigger(mvm, bar->ra, tx_cmd->tid_tspec,
189 ssn);
190 } else {
191 if (ieee80211_is_data(fc))
192 tx_cmd->tid_tspec = IWL_TID_NON_QOS;
193 else
194 tx_cmd->tid_tspec = IWL_MAX_TID_COUNT;
195
196 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
197 tx_flags |= TX_CMD_FLG_SEQ_CTL;
198 else
199 tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
200 }
201
202 /* Default to 0 (BE) when tid_spec is set to IWL_MAX_TID_COUNT */
203 if (tx_cmd->tid_tspec < IWL_MAX_TID_COUNT)
204 ac = tid_to_mac80211_ac[tx_cmd->tid_tspec];
205 else
206 ac = tid_to_mac80211_ac[0];
207
208 tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) <<
209 TX_CMD_FLG_BT_PRIO_POS;
210
211 if (ieee80211_is_mgmt(fc)) {
212 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
213 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_ASSOC);
214 else if (ieee80211_is_action(fc))
215 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
216 else
217 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
218
219 /* The spec allows Action frames in A-MPDU, we don't support
220 * it
221 */
222 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU);
223 } else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) {
224 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
225 } else {
226 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
227 }
228
229 if (ieee80211_is_data(fc) && len > mvm->rts_threshold &&
230 !is_multicast_ether_addr(hdr->addr1))
231 tx_flags |= TX_CMD_FLG_PROT_REQUIRE;
232
233 if (fw_has_capa(&mvm->fw->ucode_capa,
234 IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT) &&
235 ieee80211_action_contains_tpc(skb))
236 tx_flags |= TX_CMD_FLG_WRITE_TX_POWER;
237
238 tx_cmd->tx_flags = cpu_to_le32(tx_flags);
239 /* Total # bytes to be transmitted - PCIe code will adjust for A-MSDU */
240 tx_cmd->len = cpu_to_le16((u16)skb->len);
241 tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
242 tx_cmd->sta_id = sta_id;
243
244 tx_cmd->offload_assist =
245 cpu_to_le16(iwl_mvm_tx_csum(mvm, skb, info, amsdu));
246}
247
248static u32 iwl_mvm_get_tx_ant(struct iwl_mvm *mvm,
249 struct ieee80211_tx_info *info,
250 struct ieee80211_sta *sta, __le16 fc)
251{
252 if (info->band == NL80211_BAND_2GHZ &&
253 !iwl_mvm_bt_coex_is_shared_ant_avail(mvm))
254 return mvm->cfg->non_shared_ant << RATE_MCS_ANT_POS;
255
256 if (sta && ieee80211_is_data(fc)) {
257 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
258
259 return BIT(mvmsta->tx_ant) << RATE_MCS_ANT_POS;
260 }
261
262 return BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS;
263}
264
265static u32 iwl_mvm_convert_rate_idx(struct iwl_mvm *mvm,
266 struct ieee80211_tx_info *info,
267 int rate_idx)
268{
269 u32 rate_flags = 0;
270 u8 rate_plcp;
271 bool is_cck;
272
273 /* if the rate isn't a well known legacy rate, take the lowest one */
274 if (rate_idx < 0 || rate_idx >= IWL_RATE_COUNT_LEGACY)
275 rate_idx = iwl_mvm_mac_ctxt_get_lowest_rate(mvm,
276 info,
277 info->control.vif);
278
279 /* Get PLCP rate for tx_cmd->rate_n_flags */
280 rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(mvm->fw, rate_idx);
281 is_cck = (rate_idx >= IWL_FIRST_CCK_RATE) &&
282 (rate_idx <= IWL_LAST_CCK_RATE);
283
284 /* Set CCK or OFDM flag */
285 if (iwl_fw_lookup_cmd_ver(mvm->fw, TX_CMD, 0) > 8) {
286 if (!is_cck)
287 rate_flags |= RATE_MCS_LEGACY_OFDM_MSK;
288 else
289 rate_flags |= RATE_MCS_CCK_MSK;
290 } else if (is_cck) {
291 rate_flags |= RATE_MCS_CCK_MSK_V1;
292 }
293
294 return (u32)rate_plcp | rate_flags;
295}
296
297static u32 iwl_mvm_get_inject_tx_rate(struct iwl_mvm *mvm,
298 struct ieee80211_tx_info *info,
299 struct ieee80211_sta *sta,
300 __le16 fc)
301{
302 struct ieee80211_tx_rate *rate = &info->control.rates[0];
303 u32 result;
304
305 /*
306 * we only care about legacy/HT/VHT so far, so we can
307 * build in v1 and use iwl_new_rate_from_v1()
308 */
309
310 if (rate->flags & IEEE80211_TX_RC_VHT_MCS) {
311 u8 mcs = ieee80211_rate_get_vht_mcs(rate);
312 u8 nss = ieee80211_rate_get_vht_nss(rate);
313
314 result = RATE_MCS_VHT_MSK_V1;
315 result |= u32_encode_bits(mcs, RATE_VHT_MCS_RATE_CODE_MSK);
316 result |= u32_encode_bits(nss, RATE_MCS_NSS_MSK);
317 if (rate->flags & IEEE80211_TX_RC_SHORT_GI)
318 result |= RATE_MCS_SGI_MSK_V1;
319 if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
320 result |= u32_encode_bits(1, RATE_MCS_CHAN_WIDTH_MSK_V1);
321 else if (rate->flags & IEEE80211_TX_RC_80_MHZ_WIDTH)
322 result |= u32_encode_bits(2, RATE_MCS_CHAN_WIDTH_MSK_V1);
323 else if (rate->flags & IEEE80211_TX_RC_160_MHZ_WIDTH)
324 result |= u32_encode_bits(3, RATE_MCS_CHAN_WIDTH_MSK_V1);
325
326 if (iwl_fw_lookup_notif_ver(mvm->fw, LONG_GROUP, TX_CMD, 0) > 6)
327 result = iwl_new_rate_from_v1(result);
328 } else if (rate->flags & IEEE80211_TX_RC_MCS) {
329 result = RATE_MCS_HT_MSK_V1;
330 result |= u32_encode_bits(rate->idx,
331 RATE_HT_MCS_RATE_CODE_MSK_V1 |
332 RATE_HT_MCS_NSS_MSK_V1);
333 if (rate->flags & IEEE80211_TX_RC_SHORT_GI)
334 result |= RATE_MCS_SGI_MSK_V1;
335 if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
336 result |= u32_encode_bits(1, RATE_MCS_CHAN_WIDTH_MSK_V1);
337 if (info->flags & IEEE80211_TX_CTL_LDPC)
338 result |= RATE_MCS_LDPC_MSK_V1;
339 if (u32_get_bits(info->flags, IEEE80211_TX_CTL_STBC))
340 result |= RATE_MCS_STBC_MSK;
341
342 if (iwl_fw_lookup_notif_ver(mvm->fw, LONG_GROUP, TX_CMD, 0) > 6)
343 result = iwl_new_rate_from_v1(result);
344 } else {
345 int rate_idx = info->control.rates[0].idx;
346
347 result = iwl_mvm_convert_rate_idx(mvm, info, rate_idx);
348 }
349
350 if (info->control.antennas)
351 result |= u32_encode_bits(info->control.antennas,
352 RATE_MCS_ANT_AB_MSK);
353 else
354 result |= iwl_mvm_get_tx_ant(mvm, info, sta, fc);
355
356 return result;
357}
358
359static u32 iwl_mvm_get_tx_rate(struct iwl_mvm *mvm,
360 struct ieee80211_tx_info *info,
361 struct ieee80211_sta *sta, __le16 fc)
362{
363 int rate_idx = -1;
364
365 if (!ieee80211_hw_check(mvm->hw, HAS_RATE_CONTROL)) {
366 /* info->control is only relevant for non HW rate control */
367
368 /* HT rate doesn't make sense for a non data frame */
369 WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS &&
370 !ieee80211_is_data(fc),
371 "Got a HT rate (flags:0x%x/mcs:%d/fc:0x%x/state:%d) for a non data frame\n",
372 info->control.rates[0].flags,
373 info->control.rates[0].idx,
374 le16_to_cpu(fc),
375 sta ? iwl_mvm_sta_from_mac80211(sta)->sta_state : -1);
376
377 rate_idx = info->control.rates[0].idx;
378
379 /* For non 2 GHZ band, remap mac80211 rate indices into driver
380 * indices.
381 */
382 if (info->band != NL80211_BAND_2GHZ ||
383 (info->flags & IEEE80211_TX_CTL_NO_CCK_RATE))
384 rate_idx += IWL_FIRST_OFDM_RATE;
385
386 /* For 2.4 GHZ band, check that there is no need to remap */
387 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
388 }
389
390 return iwl_mvm_convert_rate_idx(mvm, info, rate_idx);
391}
392
393static u32 iwl_mvm_get_tx_rate_n_flags(struct iwl_mvm *mvm,
394 struct ieee80211_tx_info *info,
395 struct ieee80211_sta *sta, __le16 fc)
396{
397 if (unlikely(info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT))
398 return iwl_mvm_get_inject_tx_rate(mvm, info, sta, fc);
399
400 return iwl_mvm_get_tx_rate(mvm, info, sta, fc) |
401 iwl_mvm_get_tx_ant(mvm, info, sta, fc);
402}
403
404/*
405 * Sets the fields in the Tx cmd that are rate related
406 */
407void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd,
408 struct ieee80211_tx_info *info,
409 struct ieee80211_sta *sta, __le16 fc)
410{
411 /* Set retry limit on RTS packets */
412 tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT;
413
414 /* Set retry limit on DATA packets and Probe Responses*/
415 if (ieee80211_is_probe_resp(fc)) {
416 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT;
417 tx_cmd->rts_retry_limit =
418 min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit);
419 } else if (ieee80211_is_back_req(fc)) {
420 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT;
421 } else {
422 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY;
423 }
424
425 /*
426 * for data packets, rate info comes from the table inside the fw. This
427 * table is controlled by LINK_QUALITY commands
428 */
429
430 if (likely(ieee80211_is_data(fc) && sta &&
431 !(info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT))) {
432 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
433
434 if (mvmsta->sta_state >= IEEE80211_STA_AUTHORIZED) {
435 tx_cmd->initial_rate_index = 0;
436 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE);
437 return;
438 }
439 } else if (ieee80211_is_back_req(fc)) {
440 tx_cmd->tx_flags |=
441 cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR);
442 }
443
444 /* Set the rate in the TX cmd */
445 tx_cmd->rate_n_flags =
446 cpu_to_le32(iwl_mvm_get_tx_rate_n_flags(mvm, info, sta, fc));
447}
448
449static inline void iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info *info,
450 u8 *crypto_hdr)
451{
452 struct ieee80211_key_conf *keyconf = info->control.hw_key;
453 u64 pn;
454
455 pn = atomic64_inc_return(&keyconf->tx_pn);
456 crypto_hdr[0] = pn;
457 crypto_hdr[2] = 0;
458 crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6);
459 crypto_hdr[1] = pn >> 8;
460 crypto_hdr[4] = pn >> 16;
461 crypto_hdr[5] = pn >> 24;
462 crypto_hdr[6] = pn >> 32;
463 crypto_hdr[7] = pn >> 40;
464}
465
466/*
467 * Sets the fields in the Tx cmd that are crypto related
468 */
469static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm,
470 struct ieee80211_tx_info *info,
471 struct iwl_tx_cmd *tx_cmd,
472 struct sk_buff *skb_frag,
473 int hdrlen)
474{
475 struct ieee80211_key_conf *keyconf = info->control.hw_key;
476 u8 *crypto_hdr = skb_frag->data + hdrlen;
477 enum iwl_tx_cmd_sec_ctrl type = TX_CMD_SEC_CCM;
478 u64 pn;
479
480 switch (keyconf->cipher) {
481 case WLAN_CIPHER_SUITE_CCMP:
482 iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd);
483 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr);
484 break;
485
486 case WLAN_CIPHER_SUITE_TKIP:
487 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
488 pn = atomic64_inc_return(&keyconf->tx_pn);
489 ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn);
490 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
491 break;
492
493 case WLAN_CIPHER_SUITE_WEP104:
494 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
495 fallthrough;
496 case WLAN_CIPHER_SUITE_WEP40:
497 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP |
498 ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) &
499 TX_CMD_SEC_WEP_KEY_IDX_MSK);
500
501 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
502 break;
503 case WLAN_CIPHER_SUITE_GCMP:
504 case WLAN_CIPHER_SUITE_GCMP_256:
505 type = TX_CMD_SEC_GCMP;
506 fallthrough;
507 case WLAN_CIPHER_SUITE_CCMP_256:
508 /* TODO: Taking the key from the table might introduce a race
509 * when PTK rekeying is done, having an old packets with a PN
510 * based on the old key but the message encrypted with a new
511 * one.
512 * Need to handle this.
513 */
514 tx_cmd->sec_ctl |= type | TX_CMD_SEC_KEY_FROM_TABLE;
515 tx_cmd->key[0] = keyconf->hw_key_idx;
516 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr);
517 break;
518 default:
519 tx_cmd->sec_ctl |= TX_CMD_SEC_EXT;
520 }
521}
522
523static void iwl_mvm_copy_hdr(void *cmd, const void *hdr, int hdrlen,
524 const u8 *addr3_override)
525{
526 struct ieee80211_hdr *out_hdr = cmd;
527
528 memcpy(cmd, hdr, hdrlen);
529 if (addr3_override)
530 memcpy(out_hdr->addr3, addr3_override, ETH_ALEN);
531}
532
533/*
534 * Allocates and sets the Tx cmd the driver data pointers in the skb
535 */
536static struct iwl_device_tx_cmd *
537iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb,
538 struct ieee80211_tx_info *info, int hdrlen,
539 struct ieee80211_sta *sta, u8 sta_id,
540 const u8 *addr3_override)
541{
542 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
543 struct iwl_device_tx_cmd *dev_cmd;
544 struct iwl_tx_cmd *tx_cmd;
545
546 dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans);
547
548 if (unlikely(!dev_cmd))
549 return NULL;
550
551 dev_cmd->hdr.cmd = TX_CMD;
552
553 if (iwl_mvm_has_new_tx_api(mvm)) {
554 u32 rate_n_flags = 0;
555 u16 flags = 0;
556 struct iwl_mvm_sta *mvmsta = sta ?
557 iwl_mvm_sta_from_mac80211(sta) : NULL;
558 bool amsdu = false;
559
560 if (ieee80211_is_data_qos(hdr->frame_control)) {
561 u8 *qc = ieee80211_get_qos_ctl(hdr);
562
563 amsdu = *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT;
564 }
565
566 if (!info->control.hw_key)
567 flags |= IWL_TX_FLAGS_ENCRYPT_DIS;
568
569 /*
570 * For data and mgmt packets rate info comes from the fw. Only
571 * set rate/antenna for injected frames with fixed rate, or
572 * when no sta is given.
573 */
574 if (unlikely(!sta ||
575 info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT)) {
576 flags |= IWL_TX_FLAGS_CMD_RATE;
577 rate_n_flags =
578 iwl_mvm_get_tx_rate_n_flags(mvm, info, sta,
579 hdr->frame_control);
580 } else if (!ieee80211_is_data(hdr->frame_control) ||
581 mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) {
582 /* These are important frames */
583 flags |= IWL_TX_FLAGS_HIGH_PRI;
584 }
585
586 if (mvm->trans->trans_cfg->device_family >=
587 IWL_DEVICE_FAMILY_AX210) {
588 struct iwl_tx_cmd_gen3 *cmd = (void *)dev_cmd->payload;
589 u32 offload_assist = iwl_mvm_tx_csum(mvm, skb,
590 info, amsdu);
591
592 cmd->offload_assist = cpu_to_le32(offload_assist);
593
594 /* Total # bytes to be transmitted */
595 cmd->len = cpu_to_le16((u16)skb->len);
596
597 /* Copy MAC header from skb into command buffer */
598 iwl_mvm_copy_hdr(cmd->hdr, hdr, hdrlen, addr3_override);
599
600 cmd->flags = cpu_to_le16(flags);
601 cmd->rate_n_flags = cpu_to_le32(rate_n_flags);
602 } else {
603 struct iwl_tx_cmd_gen2 *cmd = (void *)dev_cmd->payload;
604 u16 offload_assist = iwl_mvm_tx_csum(mvm, skb,
605 info, amsdu);
606
607 cmd->offload_assist = cpu_to_le16(offload_assist);
608
609 /* Total # bytes to be transmitted */
610 cmd->len = cpu_to_le16((u16)skb->len);
611
612 /* Copy MAC header from skb into command buffer */
613 iwl_mvm_copy_hdr(cmd->hdr, hdr, hdrlen, addr3_override);
614
615 cmd->flags = cpu_to_le32(flags);
616 cmd->rate_n_flags = cpu_to_le32(rate_n_flags);
617 }
618 goto out;
619 }
620
621 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
622
623 if (info->control.hw_key)
624 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen);
625
626 iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id);
627
628 iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control);
629
630 /* Copy MAC header from skb into command buffer */
631 iwl_mvm_copy_hdr(tx_cmd->hdr, hdr, hdrlen, addr3_override);
632
633out:
634 return dev_cmd;
635}
636
637static void iwl_mvm_skb_prepare_status(struct sk_buff *skb,
638 struct iwl_device_tx_cmd *cmd)
639{
640 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb);
641
642 memset(&skb_info->status, 0, sizeof(skb_info->status));
643 memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data));
644
645 skb_info->driver_data[1] = cmd;
646}
647
648static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm,
649 struct iwl_mvm_vif_link_info *link,
650 struct ieee80211_tx_info *info,
651 struct sk_buff *skb)
652{
653 struct ieee80211_hdr *hdr = (void *)skb->data;
654 __le16 fc = hdr->frame_control;
655
656 switch (info->control.vif->type) {
657 case NL80211_IFTYPE_AP:
658 case NL80211_IFTYPE_ADHOC:
659 /*
660 * Non-bufferable frames use the broadcast station, thus they
661 * use the probe queue.
662 * Also take care of the case where we send a deauth to a
663 * station that we don't have, or similarly an association
664 * response (with non-success status) for a station we can't
665 * accept.
666 * Also, disassociate frames might happen, particular with
667 * reason 7 ("Class 3 frame received from nonassociated STA").
668 */
669 if (ieee80211_is_mgmt(fc) &&
670 (!ieee80211_is_bufferable_mmpdu(skb) ||
671 ieee80211_is_deauth(fc) || ieee80211_is_disassoc(fc)))
672 return link->mgmt_queue;
673
674 if (!ieee80211_has_order(fc) && !ieee80211_is_probe_req(fc) &&
675 is_multicast_ether_addr(hdr->addr1))
676 return link->cab_queue;
677
678 WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC,
679 "fc=0x%02x", le16_to_cpu(fc));
680 return link->mgmt_queue;
681 case NL80211_IFTYPE_P2P_DEVICE:
682 if (ieee80211_is_mgmt(fc))
683 return mvm->p2p_dev_queue;
684
685 WARN_ON_ONCE(1);
686 return mvm->p2p_dev_queue;
687 default:
688 WARN_ONCE(1, "Not a ctrl vif, no available queue\n");
689 return -1;
690 }
691}
692
693static void iwl_mvm_probe_resp_set_noa(struct iwl_mvm *mvm,
694 struct sk_buff *skb)
695{
696 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
697 struct iwl_mvm_vif *mvmvif =
698 iwl_mvm_vif_from_mac80211(info->control.vif);
699 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
700 int base_len = (u8 *)mgmt->u.probe_resp.variable - (u8 *)mgmt;
701 struct iwl_probe_resp_data *resp_data;
702 const u8 *ie;
703 u8 *pos;
704 u8 match[] = {
705 (WLAN_OUI_WFA >> 16) & 0xff,
706 (WLAN_OUI_WFA >> 8) & 0xff,
707 WLAN_OUI_WFA & 0xff,
708 WLAN_OUI_TYPE_WFA_P2P,
709 };
710
711 rcu_read_lock();
712
713 resp_data = rcu_dereference(mvmvif->deflink.probe_resp_data);
714 if (!resp_data)
715 goto out;
716
717 if (!resp_data->notif.noa_active)
718 goto out;
719
720 ie = cfg80211_find_ie_match(WLAN_EID_VENDOR_SPECIFIC,
721 mgmt->u.probe_resp.variable,
722 skb->len - base_len,
723 match, 4, 2);
724 if (!ie) {
725 IWL_DEBUG_TX(mvm, "probe resp doesn't have P2P IE\n");
726 goto out;
727 }
728
729 if (skb_tailroom(skb) < resp_data->noa_len) {
730 if (pskb_expand_head(skb, 0, resp_data->noa_len, GFP_ATOMIC)) {
731 IWL_ERR(mvm,
732 "Failed to reallocate probe resp\n");
733 goto out;
734 }
735 }
736
737 pos = skb_put(skb, resp_data->noa_len);
738
739 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
740 /* Set length of IE body (not including ID and length itself) */
741 *pos++ = resp_data->noa_len - 2;
742 *pos++ = (WLAN_OUI_WFA >> 16) & 0xff;
743 *pos++ = (WLAN_OUI_WFA >> 8) & 0xff;
744 *pos++ = WLAN_OUI_WFA & 0xff;
745 *pos++ = WLAN_OUI_TYPE_WFA_P2P;
746
747 memcpy(pos, &resp_data->notif.noa_attr,
748 resp_data->noa_len - sizeof(struct ieee80211_vendor_ie));
749
750out:
751 rcu_read_unlock();
752}
753
754int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb)
755{
756 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
757 struct ieee80211_tx_info info;
758 struct iwl_device_tx_cmd *dev_cmd;
759 u8 sta_id;
760 int hdrlen = ieee80211_hdrlen(hdr->frame_control);
761 __le16 fc = hdr->frame_control;
762 bool offchannel = IEEE80211_SKB_CB(skb)->flags &
763 IEEE80211_TX_CTL_TX_OFFCHAN;
764 int queue = -1;
765
766 if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc))
767 return -1;
768
769 memcpy(&info, skb->cb, sizeof(info));
770
771 if (WARN_ON_ONCE(skb->len > IEEE80211_MAX_DATA_LEN + hdrlen))
772 return -1;
773
774 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU))
775 return -1;
776
777 if (info.control.vif) {
778 struct iwl_mvm_vif *mvmvif =
779 iwl_mvm_vif_from_mac80211(info.control.vif);
780
781 if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE ||
782 info.control.vif->type == NL80211_IFTYPE_AP ||
783 info.control.vif->type == NL80211_IFTYPE_ADHOC) {
784 u32 link_id = u32_get_bits(info.control.flags,
785 IEEE80211_TX_CTRL_MLO_LINK);
786 struct iwl_mvm_vif_link_info *link;
787
788 if (link_id == IEEE80211_LINK_UNSPECIFIED) {
789 if (info.control.vif->active_links)
790 link_id = ffs(info.control.vif->active_links) - 1;
791 else
792 link_id = 0;
793 }
794
795 link = mvmvif->link[link_id];
796 if (WARN_ON(!link))
797 return -1;
798
799 if (!ieee80211_is_data(hdr->frame_control))
800 sta_id = link->bcast_sta.sta_id;
801 else
802 sta_id = link->mcast_sta.sta_id;
803
804 queue = iwl_mvm_get_ctrl_vif_queue(mvm, link, &info,
805 skb);
806 } else if (info.control.vif->type == NL80211_IFTYPE_MONITOR) {
807 queue = mvm->snif_queue;
808 sta_id = mvm->snif_sta.sta_id;
809 } else if (info.control.vif->type == NL80211_IFTYPE_STATION &&
810 offchannel) {
811 /*
812 * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets
813 * that can be used in 2 different types of vifs, P2P &
814 * STATION.
815 * P2P uses the offchannel queue.
816 * STATION (HS2.0) uses the auxiliary context of the FW,
817 * and hence needs to be sent on the aux queue.
818 */
819 sta_id = mvm->aux_sta.sta_id;
820 queue = mvm->aux_queue;
821 }
822 }
823
824 if (queue < 0) {
825 IWL_ERR(mvm, "No queue was found. Dropping TX\n");
826 return -1;
827 }
828
829 if (unlikely(ieee80211_is_probe_resp(fc)))
830 iwl_mvm_probe_resp_set_noa(mvm, skb);
831
832 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue);
833
834 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id,
835 NULL);
836 if (!dev_cmd)
837 return -1;
838
839 /* From now on, we cannot access info->control */
840 iwl_mvm_skb_prepare_status(skb, dev_cmd);
841
842 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) {
843 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
844 return -1;
845 }
846
847 return 0;
848}
849
850unsigned int iwl_mvm_max_amsdu_size(struct iwl_mvm *mvm,
851 struct ieee80211_sta *sta, unsigned int tid)
852{
853 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
854 u8 ac = tid_to_mac80211_ac[tid];
855 enum nl80211_band band;
856 unsigned int txf;
857 unsigned int val;
858 int lmac;
859
860 /* For HE redirect to trigger based fifos */
861 if (sta->deflink.he_cap.has_he && !WARN_ON(!iwl_mvm_has_new_tx_api(mvm)))
862 ac += 4;
863
864 txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac);
865
866 /*
867 * Don't send an AMSDU that will be longer than the TXF.
868 * Add a security margin of 256 for the TX command + headers.
869 * We also want to have the start of the next packet inside the
870 * fifo to be able to send bursts.
871 */
872 val = mvmsta->max_amsdu_len;
873
874 if (hweight16(sta->valid_links) <= 1) {
875 if (sta->valid_links) {
876 struct ieee80211_bss_conf *link_conf;
877 unsigned int link = ffs(sta->valid_links) - 1;
878
879 rcu_read_lock();
880 link_conf = rcu_dereference(mvmsta->vif->link_conf[link]);
881 if (WARN_ON(!link_conf))
882 band = NL80211_BAND_2GHZ;
883 else
884 band = link_conf->chandef.chan->band;
885 rcu_read_unlock();
886 } else {
887 band = mvmsta->vif->bss_conf.chandef.chan->band;
888 }
889
890 lmac = iwl_mvm_get_lmac_id(mvm, band);
891 } else if (fw_has_capa(&mvm->fw->ucode_capa,
892 IWL_UCODE_TLV_CAPA_CDB_SUPPORT)) {
893 /* for real MLO restrict to both LMACs if they exist */
894 lmac = IWL_LMAC_5G_INDEX;
895 val = min_t(unsigned int, val,
896 mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256);
897 lmac = IWL_LMAC_24G_INDEX;
898 } else {
899 lmac = IWL_LMAC_24G_INDEX;
900 }
901
902 return min_t(unsigned int, val,
903 mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256);
904}
905
906#ifdef CONFIG_INET
907
908static int
909iwl_mvm_tx_tso_segment(struct sk_buff *skb, unsigned int num_subframes,
910 netdev_features_t netdev_flags,
911 struct sk_buff_head *mpdus_skb)
912{
913 struct sk_buff *tmp, *next;
914 struct ieee80211_hdr *hdr = (void *)skb->data;
915 char cb[sizeof(skb->cb)];
916 u16 i = 0;
917 unsigned int tcp_payload_len;
918 unsigned int mss = skb_shinfo(skb)->gso_size;
919 bool ipv4 = (skb->protocol == htons(ETH_P_IP));
920 bool qos = ieee80211_is_data_qos(hdr->frame_control);
921 u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0;
922
923 skb_shinfo(skb)->gso_size = num_subframes * mss;
924 memcpy(cb, skb->cb, sizeof(cb));
925
926 next = skb_gso_segment(skb, netdev_flags);
927 skb_shinfo(skb)->gso_size = mss;
928 skb_shinfo(skb)->gso_type = ipv4 ? SKB_GSO_TCPV4 : SKB_GSO_TCPV6;
929 if (WARN_ON_ONCE(IS_ERR(next)))
930 return -EINVAL;
931 else if (next)
932 consume_skb(skb);
933
934 skb_list_walk_safe(next, tmp, next) {
935 memcpy(tmp->cb, cb, sizeof(tmp->cb));
936 /*
937 * Compute the length of all the data added for the A-MSDU.
938 * This will be used to compute the length to write in the TX
939 * command. We have: SNAP + IP + TCP for n -1 subframes and
940 * ETH header for n subframes.
941 */
942 tcp_payload_len = skb_tail_pointer(tmp) -
943 skb_transport_header(tmp) -
944 tcp_hdrlen(tmp) + tmp->data_len;
945
946 if (ipv4)
947 ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes);
948
949 if (tcp_payload_len > mss) {
950 skb_shinfo(tmp)->gso_size = mss;
951 skb_shinfo(tmp)->gso_type = ipv4 ? SKB_GSO_TCPV4 :
952 SKB_GSO_TCPV6;
953 } else {
954 if (qos) {
955 u8 *qc;
956
957 if (ipv4)
958 ip_send_check(ip_hdr(tmp));
959
960 qc = ieee80211_get_qos_ctl((void *)tmp->data);
961 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
962 }
963 skb_shinfo(tmp)->gso_size = 0;
964 }
965
966 skb_mark_not_on_list(tmp);
967 __skb_queue_tail(mpdus_skb, tmp);
968 i++;
969 }
970
971 return 0;
972}
973
974static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
975 struct ieee80211_tx_info *info,
976 struct ieee80211_sta *sta,
977 struct sk_buff_head *mpdus_skb)
978{
979 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
980 struct ieee80211_hdr *hdr = (void *)skb->data;
981 unsigned int mss = skb_shinfo(skb)->gso_size;
982 unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len;
983 u16 snap_ip_tcp, pad;
984 netdev_features_t netdev_flags = NETIF_F_CSUM_MASK | NETIF_F_SG;
985 u8 tid;
986
987 snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) +
988 tcp_hdrlen(skb);
989
990 if (!mvmsta->max_amsdu_len ||
991 !ieee80211_is_data_qos(hdr->frame_control) ||
992 !mvmsta->amsdu_enabled)
993 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
994
995 /*
996 * Do not build AMSDU for IPv6 with extension headers.
997 * ask stack to segment and checkum the generated MPDUs for us.
998 */
999 if (skb->protocol == htons(ETH_P_IPV6) &&
1000 ((struct ipv6hdr *)skb_network_header(skb))->nexthdr !=
1001 IPPROTO_TCP) {
1002 netdev_flags &= ~NETIF_F_CSUM_MASK;
1003 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
1004 }
1005
1006 tid = ieee80211_get_tid(hdr);
1007 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
1008 return -EINVAL;
1009
1010 /*
1011 * No need to lock amsdu_in_ampdu_allowed since it can't be modified
1012 * during an BA session.
1013 */
1014 if ((info->flags & IEEE80211_TX_CTL_AMPDU &&
1015 !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) ||
1016 !(mvmsta->amsdu_enabled & BIT(tid)))
1017 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
1018
1019 /*
1020 * Take the min of ieee80211 station and mvm station
1021 */
1022 max_amsdu_len =
1023 min_t(unsigned int, sta->cur->max_amsdu_len,
1024 iwl_mvm_max_amsdu_size(mvm, sta, tid));
1025
1026 /*
1027 * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not
1028 * supported. This is a spec requirement (IEEE 802.11-2015
1029 * section 8.7.3 NOTE 3).
1030 */
1031 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
1032 !sta->deflink.vht_cap.vht_supported)
1033 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095);
1034
1035 /* Sub frame header + SNAP + IP header + TCP header + MSS */
1036 subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss;
1037 pad = (4 - subf_len) & 0x3;
1038
1039 /*
1040 * If we have N subframes in the A-MSDU, then the A-MSDU's size is
1041 * N * subf_len + (N - 1) * pad.
1042 */
1043 num_subframes = (max_amsdu_len + pad) / (subf_len + pad);
1044
1045 if (sta->max_amsdu_subframes &&
1046 num_subframes > sta->max_amsdu_subframes)
1047 num_subframes = sta->max_amsdu_subframes;
1048
1049 tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
1050 tcp_hdrlen(skb) + skb->data_len;
1051
1052 /*
1053 * Make sure we have enough TBs for the A-MSDU:
1054 * 2 for each subframe
1055 * 1 more for each fragment
1056 * 1 more for the potential data in the header
1057 */
1058 if ((num_subframes * 2 + skb_shinfo(skb)->nr_frags + 1) >
1059 mvm->trans->max_skb_frags)
1060 num_subframes = 1;
1061
1062 if (num_subframes > 1)
1063 *ieee80211_get_qos_ctl(hdr) |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
1064
1065 /* This skb fits in one single A-MSDU */
1066 if (num_subframes * mss >= tcp_payload_len) {
1067 __skb_queue_tail(mpdus_skb, skb);
1068 return 0;
1069 }
1070
1071 /*
1072 * Trick the segmentation function to make it
1073 * create SKBs that can fit into one A-MSDU.
1074 */
1075 return iwl_mvm_tx_tso_segment(skb, num_subframes, netdev_flags,
1076 mpdus_skb);
1077}
1078#else /* CONFIG_INET */
1079static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
1080 struct ieee80211_tx_info *info,
1081 struct ieee80211_sta *sta,
1082 struct sk_buff_head *mpdus_skb)
1083{
1084 /* Impossible to get TSO with CONFIG_INET */
1085 WARN_ON(1);
1086
1087 return -1;
1088}
1089#endif
1090
1091/* Check if there are any timed-out TIDs on a given shared TXQ */
1092static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id)
1093{
1094 unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap;
1095 unsigned long now = jiffies;
1096 int tid;
1097
1098 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1099 return false;
1100
1101 for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) {
1102 if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] +
1103 IWL_MVM_DQA_QUEUE_TIMEOUT, now))
1104 return true;
1105 }
1106
1107 return false;
1108}
1109
1110static void iwl_mvm_tx_airtime(struct iwl_mvm *mvm,
1111 struct iwl_mvm_sta *mvmsta,
1112 int airtime)
1113{
1114 int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
1115 struct iwl_mvm_tcm_mac *mdata;
1116
1117 if (mac >= NUM_MAC_INDEX_DRIVER)
1118 return;
1119
1120 mdata = &mvm->tcm.data[mac];
1121
1122 if (mvm->tcm.paused)
1123 return;
1124
1125 if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD))
1126 schedule_delayed_work(&mvm->tcm.work, 0);
1127
1128 mdata->tx.airtime += airtime;
1129}
1130
1131static int iwl_mvm_tx_pkt_queued(struct iwl_mvm *mvm,
1132 struct iwl_mvm_sta *mvmsta, int tid)
1133{
1134 u32 ac = tid_to_mac80211_ac[tid];
1135 int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
1136 struct iwl_mvm_tcm_mac *mdata;
1137
1138 if (mac >= NUM_MAC_INDEX_DRIVER)
1139 return -EINVAL;
1140
1141 mdata = &mvm->tcm.data[mac];
1142
1143 mdata->tx.pkts[ac]++;
1144
1145 return 0;
1146}
1147
1148/*
1149 * Sets the fields in the Tx cmd that are crypto related.
1150 *
1151 * This function must be called with BHs disabled.
1152 */
1153static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb,
1154 struct ieee80211_tx_info *info,
1155 struct ieee80211_sta *sta,
1156 const u8 *addr3_override)
1157{
1158 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1159 struct iwl_mvm_sta *mvmsta;
1160 struct iwl_device_tx_cmd *dev_cmd;
1161 __le16 fc;
1162 u16 seq_number = 0;
1163 u8 tid = IWL_MAX_TID_COUNT;
1164 u16 txq_id;
1165 bool is_ampdu = false;
1166 int hdrlen;
1167
1168 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1169 fc = hdr->frame_control;
1170 hdrlen = ieee80211_hdrlen(fc);
1171
1172 if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc))
1173 return -1;
1174
1175 if (WARN_ON_ONCE(!mvmsta))
1176 return -1;
1177
1178 if (WARN_ON_ONCE(mvmsta->deflink.sta_id == IWL_MVM_INVALID_STA))
1179 return -1;
1180
1181 if (unlikely(ieee80211_is_any_nullfunc(fc)) && sta->deflink.he_cap.has_he)
1182 return -1;
1183
1184 if (unlikely(ieee80211_is_probe_resp(fc)))
1185 iwl_mvm_probe_resp_set_noa(mvm, skb);
1186
1187 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen,
1188 sta, mvmsta->deflink.sta_id,
1189 addr3_override);
1190 if (!dev_cmd)
1191 goto drop;
1192
1193 /*
1194 * we handle that entirely ourselves -- for uAPSD the firmware
1195 * will always send a notification, and for PS-Poll responses
1196 * we'll notify mac80211 when getting frame status
1197 */
1198 info->flags &= ~IEEE80211_TX_STATUS_EOSP;
1199
1200 spin_lock(&mvmsta->lock);
1201
1202 /* nullfunc frames should go to the MGMT queue regardless of QOS,
1203 * the conditions of !ieee80211_is_qos_nullfunc(fc) and
1204 * !ieee80211_is_data_qos(fc) keep the default assignment of MGMT TID
1205 */
1206 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
1207 tid = ieee80211_get_tid(hdr);
1208 if (WARN_ONCE(tid >= IWL_MAX_TID_COUNT, "Invalid TID %d", tid))
1209 goto drop_unlock_sta;
1210
1211 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU;
1212 if (WARN_ONCE(is_ampdu &&
1213 mvmsta->tid_data[tid].state != IWL_AGG_ON,
1214 "Invalid internal agg state %d for TID %d",
1215 mvmsta->tid_data[tid].state, tid))
1216 goto drop_unlock_sta;
1217
1218 seq_number = mvmsta->tid_data[tid].seq_number;
1219 seq_number &= IEEE80211_SCTL_SEQ;
1220
1221 if (!iwl_mvm_has_new_tx_api(mvm)) {
1222 struct iwl_tx_cmd *tx_cmd = (void *)dev_cmd->payload;
1223
1224 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
1225 hdr->seq_ctrl |= cpu_to_le16(seq_number);
1226 /* update the tx_cmd hdr as it was already copied */
1227 tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl;
1228 }
1229 } else if (ieee80211_is_data(fc) && !ieee80211_is_data_qos(fc) &&
1230 !ieee80211_is_nullfunc(fc)) {
1231 tid = IWL_TID_NON_QOS;
1232 }
1233
1234 txq_id = mvmsta->tid_data[tid].txq_id;
1235
1236 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
1237
1238 if (WARN_ONCE(txq_id == IWL_MVM_INVALID_QUEUE, "Invalid TXQ id")) {
1239 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1240 spin_unlock(&mvmsta->lock);
1241 return -1;
1242 }
1243
1244 if (!iwl_mvm_has_new_tx_api(mvm)) {
1245 /* Keep track of the time of the last frame for this RA/TID */
1246 mvm->queue_info[txq_id].last_frame_time[tid] = jiffies;
1247
1248 /*
1249 * If we have timed-out TIDs - schedule the worker that will
1250 * reconfig the queues and update them
1251 *
1252 * Note that the no lock is taken here in order to not serialize
1253 * the TX flow. This isn't dangerous because scheduling
1254 * mvm->add_stream_wk can't ruin the state, and if we DON'T
1255 * schedule it due to some race condition then next TX we get
1256 * here we will.
1257 */
1258 if (unlikely(mvm->queue_info[txq_id].status ==
1259 IWL_MVM_QUEUE_SHARED &&
1260 iwl_mvm_txq_should_update(mvm, txq_id)))
1261 schedule_work(&mvm->add_stream_wk);
1262 }
1263
1264 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x len %d\n",
1265 mvmsta->deflink.sta_id, tid, txq_id,
1266 IEEE80211_SEQ_TO_SN(seq_number), skb->len);
1267
1268 /* From now on, we cannot access info->control */
1269 iwl_mvm_skb_prepare_status(skb, dev_cmd);
1270
1271 /*
1272 * The IV is introduced by the HW for new tx api, and it is not present
1273 * in the skb, hence, don't tell iwl_mvm_mei_tx_copy_to_csme about the
1274 * IV for those devices.
1275 */
1276 if (ieee80211_is_data(fc))
1277 iwl_mvm_mei_tx_copy_to_csme(mvm, skb,
1278 info->control.hw_key &&
1279 !iwl_mvm_has_new_tx_api(mvm) ?
1280 info->control.hw_key->iv_len : 0);
1281
1282 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id))
1283 goto drop_unlock_sta;
1284
1285 if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc))
1286 mvmsta->tid_data[tid].seq_number = seq_number + 0x10;
1287
1288 spin_unlock(&mvmsta->lock);
1289
1290 if (iwl_mvm_tx_pkt_queued(mvm, mvmsta,
1291 tid == IWL_MAX_TID_COUNT ? 0 : tid))
1292 goto drop;
1293
1294 return 0;
1295
1296drop_unlock_sta:
1297 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1298 spin_unlock(&mvmsta->lock);
1299drop:
1300 IWL_DEBUG_TX(mvm, "TX to [%d|%d] dropped\n", mvmsta->deflink.sta_id,
1301 tid);
1302 return -1;
1303}
1304
1305int iwl_mvm_tx_skb_sta(struct iwl_mvm *mvm, struct sk_buff *skb,
1306 struct ieee80211_sta *sta)
1307{
1308 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1309 struct ieee80211_tx_info info;
1310 struct sk_buff_head mpdus_skbs;
1311 struct ieee80211_vif *vif;
1312 unsigned int payload_len;
1313 int ret;
1314 struct sk_buff *orig_skb = skb;
1315 const u8 *addr3;
1316
1317 if (WARN_ON_ONCE(!mvmsta))
1318 return -1;
1319
1320 if (WARN_ON_ONCE(mvmsta->deflink.sta_id == IWL_MVM_INVALID_STA))
1321 return -1;
1322
1323 memcpy(&info, skb->cb, sizeof(info));
1324
1325 if (!skb_is_gso(skb))
1326 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta, NULL);
1327
1328 payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
1329 tcp_hdrlen(skb) + skb->data_len;
1330
1331 if (payload_len <= skb_shinfo(skb)->gso_size)
1332 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta, NULL);
1333
1334 __skb_queue_head_init(&mpdus_skbs);
1335
1336 vif = info.control.vif;
1337 if (!vif)
1338 return -1;
1339
1340 ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs);
1341 if (ret)
1342 return ret;
1343
1344 WARN_ON(skb_queue_empty(&mpdus_skbs));
1345
1346 /*
1347 * As described in IEEE sta 802.11-2020, table 9-30 (Address
1348 * field contents), A-MSDU address 3 should contain the BSSID
1349 * address.
1350 * Pass address 3 down to iwl_mvm_tx_mpdu() and further to set it
1351 * in the command header. We need to preserve the original
1352 * address 3 in the skb header to correctly create all the
1353 * A-MSDU subframe headers from it.
1354 */
1355 switch (vif->type) {
1356 case NL80211_IFTYPE_STATION:
1357 addr3 = vif->cfg.ap_addr;
1358 break;
1359 case NL80211_IFTYPE_AP:
1360 addr3 = vif->addr;
1361 break;
1362 default:
1363 addr3 = NULL;
1364 break;
1365 }
1366
1367 while (!skb_queue_empty(&mpdus_skbs)) {
1368 struct ieee80211_hdr *hdr;
1369 bool amsdu;
1370
1371 skb = __skb_dequeue(&mpdus_skbs);
1372 hdr = (void *)skb->data;
1373 amsdu = ieee80211_is_data_qos(hdr->frame_control) &&
1374 (*ieee80211_get_qos_ctl(hdr) &
1375 IEEE80211_QOS_CTL_A_MSDU_PRESENT);
1376
1377 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta,
1378 amsdu ? addr3 : NULL);
1379 if (ret) {
1380 /* Free skbs created as part of TSO logic that have not yet been dequeued */
1381 __skb_queue_purge(&mpdus_skbs);
1382 /* skb here is not necessarily same as skb that entered this method,
1383 * so free it explicitly.
1384 */
1385 if (skb == orig_skb)
1386 ieee80211_free_txskb(mvm->hw, skb);
1387 else
1388 kfree_skb(skb);
1389 /* there was error, but we consumed skb one way or another, so return 0 */
1390 return 0;
1391 }
1392 }
1393
1394 return 0;
1395}
1396
1397static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm,
1398 struct ieee80211_sta *sta, u8 tid)
1399{
1400 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1401 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1402 struct ieee80211_vif *vif = mvmsta->vif;
1403 u16 normalized_ssn;
1404
1405 lockdep_assert_held(&mvmsta->lock);
1406
1407 if ((tid_data->state == IWL_AGG_ON ||
1408 tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) &&
1409 iwl_mvm_tid_queued(mvm, tid_data) == 0) {
1410 /*
1411 * Now that this aggregation or DQA queue is empty tell
1412 * mac80211 so it knows we no longer have frames buffered for
1413 * the station on this TID (for the TIM bitmap calculation.)
1414 */
1415 ieee80211_sta_set_buffered(sta, tid, false);
1416 }
1417
1418 /*
1419 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
1420 * to align the wrap around of ssn so we compare relevant values.
1421 */
1422 normalized_ssn = tid_data->ssn;
1423 if (mvm->trans->trans_cfg->gen2)
1424 normalized_ssn &= 0xff;
1425
1426 if (normalized_ssn != tid_data->next_reclaimed)
1427 return;
1428
1429 switch (tid_data->state) {
1430 case IWL_EMPTYING_HW_QUEUE_ADDBA:
1431 IWL_DEBUG_TX_QUEUES(mvm,
1432 "Can continue addBA flow ssn = next_recl = %d\n",
1433 tid_data->next_reclaimed);
1434 tid_data->state = IWL_AGG_STARTING;
1435 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1436 break;
1437
1438 case IWL_EMPTYING_HW_QUEUE_DELBA:
1439 IWL_DEBUG_TX_QUEUES(mvm,
1440 "Can continue DELBA flow ssn = next_recl = %d\n",
1441 tid_data->next_reclaimed);
1442 tid_data->state = IWL_AGG_OFF;
1443 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1444 break;
1445
1446 default:
1447 break;
1448 }
1449}
1450
1451#ifdef CONFIG_IWLWIFI_DEBUG
1452const char *iwl_mvm_get_tx_fail_reason(u32 status)
1453{
1454#define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
1455#define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
1456
1457 switch (status & TX_STATUS_MSK) {
1458 case TX_STATUS_SUCCESS:
1459 return "SUCCESS";
1460 TX_STATUS_POSTPONE(DELAY);
1461 TX_STATUS_POSTPONE(FEW_BYTES);
1462 TX_STATUS_POSTPONE(BT_PRIO);
1463 TX_STATUS_POSTPONE(QUIET_PERIOD);
1464 TX_STATUS_POSTPONE(CALC_TTAK);
1465 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
1466 TX_STATUS_FAIL(SHORT_LIMIT);
1467 TX_STATUS_FAIL(LONG_LIMIT);
1468 TX_STATUS_FAIL(UNDERRUN);
1469 TX_STATUS_FAIL(DRAIN_FLOW);
1470 TX_STATUS_FAIL(RFKILL_FLUSH);
1471 TX_STATUS_FAIL(LIFE_EXPIRE);
1472 TX_STATUS_FAIL(DEST_PS);
1473 TX_STATUS_FAIL(HOST_ABORTED);
1474 TX_STATUS_FAIL(BT_RETRY);
1475 TX_STATUS_FAIL(STA_INVALID);
1476 TX_STATUS_FAIL(FRAG_DROPPED);
1477 TX_STATUS_FAIL(TID_DISABLE);
1478 TX_STATUS_FAIL(FIFO_FLUSHED);
1479 TX_STATUS_FAIL(SMALL_CF_POLL);
1480 TX_STATUS_FAIL(FW_DROP);
1481 TX_STATUS_FAIL(STA_COLOR_MISMATCH);
1482 }
1483
1484 return "UNKNOWN";
1485
1486#undef TX_STATUS_FAIL
1487#undef TX_STATUS_POSTPONE
1488}
1489#endif /* CONFIG_IWLWIFI_DEBUG */
1490
1491static int iwl_mvm_get_hwrate_chan_width(u32 chan_width)
1492{
1493 switch (chan_width) {
1494 case RATE_MCS_CHAN_WIDTH_20:
1495 return 0;
1496 case RATE_MCS_CHAN_WIDTH_40:
1497 return IEEE80211_TX_RC_40_MHZ_WIDTH;
1498 case RATE_MCS_CHAN_WIDTH_80:
1499 return IEEE80211_TX_RC_80_MHZ_WIDTH;
1500 case RATE_MCS_CHAN_WIDTH_160:
1501 return IEEE80211_TX_RC_160_MHZ_WIDTH;
1502 default:
1503 return 0;
1504 }
1505}
1506
1507void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags,
1508 enum nl80211_band band,
1509 struct ieee80211_tx_rate *r)
1510{
1511 u32 format = rate_n_flags & RATE_MCS_MOD_TYPE_MSK;
1512 u32 rate = format == RATE_MCS_HT_MSK ?
1513 RATE_HT_MCS_INDEX(rate_n_flags) :
1514 rate_n_flags & RATE_MCS_CODE_MSK;
1515
1516 r->flags |=
1517 iwl_mvm_get_hwrate_chan_width(rate_n_flags &
1518 RATE_MCS_CHAN_WIDTH_MSK);
1519
1520 if (rate_n_flags & RATE_MCS_SGI_MSK)
1521 r->flags |= IEEE80211_TX_RC_SHORT_GI;
1522 if (format == RATE_MCS_HT_MSK) {
1523 r->flags |= IEEE80211_TX_RC_MCS;
1524 r->idx = rate;
1525 } else if (format == RATE_MCS_VHT_MSK) {
1526 ieee80211_rate_set_vht(r, rate,
1527 FIELD_GET(RATE_MCS_NSS_MSK,
1528 rate_n_flags) + 1);
1529 r->flags |= IEEE80211_TX_RC_VHT_MCS;
1530 } else if (format == RATE_MCS_HE_MSK) {
1531 /* mac80211 cannot do this without ieee80211_tx_status_ext()
1532 * but it only matters for radiotap */
1533 r->idx = 0;
1534 } else {
1535 r->idx = iwl_mvm_legacy_hw_idx_to_mac80211_idx(rate_n_flags,
1536 band);
1537 }
1538}
1539
1540void iwl_mvm_hwrate_to_tx_rate_v1(u32 rate_n_flags,
1541 enum nl80211_band band,
1542 struct ieee80211_tx_rate *r)
1543{
1544 if (rate_n_flags & RATE_HT_MCS_GF_MSK)
1545 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
1546
1547 r->flags |=
1548 iwl_mvm_get_hwrate_chan_width(rate_n_flags &
1549 RATE_MCS_CHAN_WIDTH_MSK_V1);
1550
1551 if (rate_n_flags & RATE_MCS_SGI_MSK_V1)
1552 r->flags |= IEEE80211_TX_RC_SHORT_GI;
1553 if (rate_n_flags & RATE_MCS_HT_MSK_V1) {
1554 r->flags |= IEEE80211_TX_RC_MCS;
1555 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK_V1;
1556 } else if (rate_n_flags & RATE_MCS_VHT_MSK_V1) {
1557 ieee80211_rate_set_vht(
1558 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK,
1559 FIELD_GET(RATE_MCS_NSS_MSK, rate_n_flags) + 1);
1560 r->flags |= IEEE80211_TX_RC_VHT_MCS;
1561 } else {
1562 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
1563 band);
1564 }
1565}
1566
1567/*
1568 * translate ucode response to mac80211 tx status control values
1569 */
1570static void iwl_mvm_hwrate_to_tx_status(const struct iwl_fw *fw,
1571 u32 rate_n_flags,
1572 struct ieee80211_tx_info *info)
1573{
1574 struct ieee80211_tx_rate *r = &info->status.rates[0];
1575
1576 if (iwl_fw_lookup_notif_ver(fw, LONG_GROUP,
1577 TX_CMD, 0) <= 6)
1578 rate_n_flags = iwl_new_rate_from_v1(rate_n_flags);
1579
1580 info->status.antenna =
1581 ((rate_n_flags & RATE_MCS_ANT_AB_MSK) >> RATE_MCS_ANT_POS);
1582 iwl_mvm_hwrate_to_tx_rate(rate_n_flags,
1583 info->band, r);
1584}
1585
1586static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm,
1587 u32 status, __le16 frame_control)
1588{
1589 struct iwl_fw_dbg_trigger_tlv *trig;
1590 struct iwl_fw_dbg_trigger_tx_status *status_trig;
1591 int i;
1592
1593 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS) {
1594 enum iwl_fw_ini_time_point tp =
1595 IWL_FW_INI_TIME_POINT_TX_FAILED;
1596
1597 if (ieee80211_is_action(frame_control))
1598 tp = IWL_FW_INI_TIME_POINT_TX_WFD_ACTION_FRAME_FAILED;
1599
1600 iwl_dbg_tlv_time_point(&mvm->fwrt,
1601 tp, NULL);
1602 return;
1603 }
1604
1605 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL,
1606 FW_DBG_TRIGGER_TX_STATUS);
1607 if (!trig)
1608 return;
1609
1610 status_trig = (void *)trig->data;
1611
1612 for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) {
1613 /* don't collect on status 0 */
1614 if (!status_trig->statuses[i].status)
1615 break;
1616
1617 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK))
1618 continue;
1619
1620 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
1621 "Tx status %d was received",
1622 status & TX_STATUS_MSK);
1623 break;
1624 }
1625}
1626
1627/*
1628 * iwl_mvm_get_scd_ssn - returns the SSN of the SCD
1629 * @tx_resp: the Tx response from the fw (agg or non-agg)
1630 *
1631 * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since
1632 * it can't know that everything will go well until the end of the AMPDU, it
1633 * can't know in advance the number of MPDUs that will be sent in the current
1634 * batch. This is why it writes the agg Tx response while it fetches the MPDUs.
1635 * Hence, it can't know in advance what the SSN of the SCD will be at the end
1636 * of the batch. This is why the SSN of the SCD is written at the end of the
1637 * whole struct at a variable offset. This function knows how to cope with the
1638 * variable offset and returns the SSN of the SCD.
1639 */
1640static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm,
1641 struct iwl_mvm_tx_resp *tx_resp)
1642{
1643 return le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) +
1644 tx_resp->frame_count) & 0xfff;
1645}
1646
1647static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm,
1648 struct iwl_rx_packet *pkt)
1649{
1650 struct ieee80211_sta *sta;
1651 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1652 int txq_id = SEQ_TO_QUEUE(sequence);
1653 /* struct iwl_mvm_tx_resp_v3 is almost the same */
1654 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1655 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1656 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1657 struct agg_tx_status *agg_status =
1658 iwl_mvm_get_agg_status(mvm, tx_resp);
1659 u32 status = le16_to_cpu(agg_status->status);
1660 u16 ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp);
1661 struct sk_buff_head skbs;
1662 u8 skb_freed = 0;
1663 u8 lq_color;
1664 u16 next_reclaimed, seq_ctl;
1665 bool is_ndp = false;
1666
1667 __skb_queue_head_init(&skbs);
1668
1669 if (iwl_mvm_has_new_tx_api(mvm))
1670 txq_id = le16_to_cpu(tx_resp->tx_queue);
1671
1672 seq_ctl = le16_to_cpu(tx_resp->seq_ctl);
1673
1674 /* we can free until ssn % q.n_bd not inclusive */
1675 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs, false);
1676
1677 while (!skb_queue_empty(&skbs)) {
1678 struct sk_buff *skb = __skb_dequeue(&skbs);
1679 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1680 struct ieee80211_hdr *hdr = (void *)skb->data;
1681 bool flushed = false;
1682
1683 skb_freed++;
1684
1685 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1686
1687 memset(&info->status, 0, sizeof(info->status));
1688 info->flags &= ~(IEEE80211_TX_STAT_ACK | IEEE80211_TX_STAT_TX_FILTERED);
1689
1690 /* inform mac80211 about what happened with the frame */
1691 switch (status & TX_STATUS_MSK) {
1692 case TX_STATUS_SUCCESS:
1693 case TX_STATUS_DIRECT_DONE:
1694 info->flags |= IEEE80211_TX_STAT_ACK;
1695 break;
1696 case TX_STATUS_FAIL_FIFO_FLUSHED:
1697 case TX_STATUS_FAIL_DRAIN_FLOW:
1698 flushed = true;
1699 break;
1700 case TX_STATUS_FAIL_DEST_PS:
1701 /* the FW should have stopped the queue and not
1702 * return this status
1703 */
1704 IWL_ERR_LIMIT(mvm,
1705 "FW reported TX filtered, status=0x%x, FC=0x%x\n",
1706 status, le16_to_cpu(hdr->frame_control));
1707 info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
1708 break;
1709 default:
1710 break;
1711 }
1712
1713 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS &&
1714 ieee80211_is_mgmt(hdr->frame_control))
1715 iwl_mvm_toggle_tx_ant(mvm, &mvm->mgmt_last_antenna_idx);
1716
1717 /*
1718 * If we are freeing multiple frames, mark all the frames
1719 * but the first one as acked, since they were acknowledged
1720 * before
1721 * */
1722 if (skb_freed > 1)
1723 info->flags |= IEEE80211_TX_STAT_ACK;
1724
1725 iwl_mvm_tx_status_check_trigger(mvm, status, hdr->frame_control);
1726
1727 info->status.rates[0].count = tx_resp->failure_frame + 1;
1728
1729 iwl_mvm_hwrate_to_tx_status(mvm->fw,
1730 le32_to_cpu(tx_resp->initial_rate),
1731 info);
1732
1733 /* Don't assign the converted initial_rate, because driver
1734 * TLC uses this and doesn't support the new FW rate
1735 */
1736 info->status.status_driver_data[1] =
1737 (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate);
1738
1739 /* Single frame failure in an AMPDU queue => send BAR */
1740 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
1741 !(info->flags & IEEE80211_TX_STAT_ACK) &&
1742 !(info->flags & IEEE80211_TX_STAT_TX_FILTERED) && !flushed)
1743 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1744 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1745
1746 /* W/A FW bug: seq_ctl is wrong upon failure / BAR frame */
1747 if (ieee80211_is_back_req(hdr->frame_control))
1748 seq_ctl = 0;
1749 else if (status != TX_STATUS_SUCCESS)
1750 seq_ctl = le16_to_cpu(hdr->seq_ctrl);
1751
1752 if (unlikely(!seq_ctl)) {
1753 /*
1754 * If it is an NDP, we can't update next_reclaim since
1755 * its sequence control is 0. Note that for that same
1756 * reason, NDPs are never sent to A-MPDU'able queues
1757 * so that we can never have more than one freed frame
1758 * for a single Tx resonse (see WARN_ON below).
1759 */
1760 if (ieee80211_is_qos_nullfunc(hdr->frame_control))
1761 is_ndp = true;
1762 }
1763
1764 /*
1765 * TODO: this is not accurate if we are freeing more than one
1766 * packet.
1767 */
1768 info->status.tx_time =
1769 le16_to_cpu(tx_resp->wireless_media_time);
1770 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1);
1771 lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info);
1772 info->status.status_driver_data[0] =
1773 RS_DRV_DATA_PACK(lq_color, tx_resp->reduced_tpc);
1774
1775 if (likely(!iwl_mvm_time_sync_frame(mvm, skb, hdr->addr1)))
1776 ieee80211_tx_status_skb(mvm->hw, skb);
1777 }
1778
1779 /* This is an aggregation queue or might become one, so we use
1780 * the ssn since: ssn = wifi seq_num % 256.
1781 * The seq_ctl is the sequence control of the packet to which
1782 * this Tx response relates. But if there is a hole in the
1783 * bitmap of the BA we received, this Tx response may allow to
1784 * reclaim the hole and all the subsequent packets that were
1785 * already acked. In that case, seq_ctl != ssn, and the next
1786 * packet to be reclaimed will be ssn and not seq_ctl. In that
1787 * case, several packets will be reclaimed even if
1788 * frame_count = 1.
1789 *
1790 * The ssn is the index (% 256) of the latest packet that has
1791 * treated (acked / dropped) + 1.
1792 */
1793 next_reclaimed = ssn;
1794
1795 IWL_DEBUG_TX_REPLY(mvm,
1796 "TXQ %d status %s (0x%08x)\n",
1797 txq_id, iwl_mvm_get_tx_fail_reason(status), status);
1798
1799 IWL_DEBUG_TX_REPLY(mvm,
1800 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
1801 le32_to_cpu(tx_resp->initial_rate),
1802 tx_resp->failure_frame, SEQ_TO_INDEX(sequence),
1803 ssn, next_reclaimed, seq_ctl);
1804
1805 rcu_read_lock();
1806
1807 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1808 /*
1809 * sta can't be NULL otherwise it'd mean that the sta has been freed in
1810 * the firmware while we still have packets for it in the Tx queues.
1811 */
1812 if (WARN_ON_ONCE(!sta))
1813 goto out;
1814
1815 if (!IS_ERR(sta)) {
1816 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1817
1818 iwl_mvm_tx_airtime(mvm, mvmsta,
1819 le16_to_cpu(tx_resp->wireless_media_time));
1820
1821 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS &&
1822 mvmsta->sta_state < IEEE80211_STA_AUTHORIZED)
1823 iwl_mvm_toggle_tx_ant(mvm, &mvmsta->tx_ant);
1824
1825 if (sta->wme && tid != IWL_MGMT_TID) {
1826 struct iwl_mvm_tid_data *tid_data =
1827 &mvmsta->tid_data[tid];
1828 bool send_eosp_ndp = false;
1829
1830 spin_lock_bh(&mvmsta->lock);
1831
1832 if (!is_ndp) {
1833 tid_data->next_reclaimed = next_reclaimed;
1834 IWL_DEBUG_TX_REPLY(mvm,
1835 "Next reclaimed packet:%d\n",
1836 next_reclaimed);
1837 } else {
1838 IWL_DEBUG_TX_REPLY(mvm,
1839 "NDP - don't update next_reclaimed\n");
1840 }
1841
1842 iwl_mvm_check_ratid_empty(mvm, sta, tid);
1843
1844 if (mvmsta->sleep_tx_count) {
1845 mvmsta->sleep_tx_count--;
1846 if (mvmsta->sleep_tx_count &&
1847 !iwl_mvm_tid_queued(mvm, tid_data)) {
1848 /*
1849 * The number of frames in the queue
1850 * dropped to 0 even if we sent less
1851 * frames than we thought we had on the
1852 * Tx queue.
1853 * This means we had holes in the BA
1854 * window that we just filled, ask
1855 * mac80211 to send EOSP since the
1856 * firmware won't know how to do that.
1857 * Send NDP and the firmware will send
1858 * EOSP notification that will trigger
1859 * a call to ieee80211_sta_eosp().
1860 */
1861 send_eosp_ndp = true;
1862 }
1863 }
1864
1865 spin_unlock_bh(&mvmsta->lock);
1866 if (send_eosp_ndp) {
1867 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta,
1868 IEEE80211_FRAME_RELEASE_UAPSD,
1869 1, tid, false, false);
1870 mvmsta->sleep_tx_count = 0;
1871 ieee80211_send_eosp_nullfunc(sta, tid);
1872 }
1873 }
1874
1875 if (mvmsta->next_status_eosp) {
1876 mvmsta->next_status_eosp = false;
1877 ieee80211_sta_eosp(sta);
1878 }
1879 }
1880out:
1881 rcu_read_unlock();
1882}
1883
1884#ifdef CONFIG_IWLWIFI_DEBUG
1885#define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
1886static const char *iwl_get_agg_tx_status(u16 status)
1887{
1888 switch (status & AGG_TX_STATE_STATUS_MSK) {
1889 AGG_TX_STATE_(TRANSMITTED);
1890 AGG_TX_STATE_(UNDERRUN);
1891 AGG_TX_STATE_(BT_PRIO);
1892 AGG_TX_STATE_(FEW_BYTES);
1893 AGG_TX_STATE_(ABORT);
1894 AGG_TX_STATE_(TX_ON_AIR_DROP);
1895 AGG_TX_STATE_(LAST_SENT_TRY_CNT);
1896 AGG_TX_STATE_(LAST_SENT_BT_KILL);
1897 AGG_TX_STATE_(SCD_QUERY);
1898 AGG_TX_STATE_(TEST_BAD_CRC32);
1899 AGG_TX_STATE_(RESPONSE);
1900 AGG_TX_STATE_(DUMP_TX);
1901 AGG_TX_STATE_(DELAY_TX);
1902 }
1903
1904 return "UNKNOWN";
1905}
1906
1907static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1908 struct iwl_rx_packet *pkt)
1909{
1910 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1911 struct agg_tx_status *frame_status =
1912 iwl_mvm_get_agg_status(mvm, tx_resp);
1913 int i;
1914 bool tirgger_timepoint = false;
1915
1916 for (i = 0; i < tx_resp->frame_count; i++) {
1917 u16 fstatus = le16_to_cpu(frame_status[i].status);
1918 /* In case one frame wasn't transmitted trigger time point */
1919 tirgger_timepoint |= ((fstatus & AGG_TX_STATE_STATUS_MSK) !=
1920 AGG_TX_STATE_TRANSMITTED);
1921 IWL_DEBUG_TX_REPLY(mvm,
1922 "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
1923 iwl_get_agg_tx_status(fstatus),
1924 fstatus & AGG_TX_STATE_STATUS_MSK,
1925 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >>
1926 AGG_TX_STATE_TRY_CNT_POS,
1927 le16_to_cpu(frame_status[i].sequence));
1928 }
1929
1930 if (tirgger_timepoint)
1931 iwl_dbg_tlv_time_point(&mvm->fwrt,
1932 IWL_FW_INI_TIME_POINT_TX_FAILED, NULL);
1933
1934}
1935#else
1936static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1937 struct iwl_rx_packet *pkt)
1938{}
1939#endif /* CONFIG_IWLWIFI_DEBUG */
1940
1941static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm,
1942 struct iwl_rx_packet *pkt)
1943{
1944 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1945 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1946 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1947 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1948 struct iwl_mvm_sta *mvmsta;
1949 int queue = SEQ_TO_QUEUE(sequence);
1950 struct ieee80211_sta *sta;
1951
1952 if (WARN_ON_ONCE(queue < IWL_MVM_DQA_MIN_DATA_QUEUE &&
1953 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)))
1954 return;
1955
1956 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt);
1957
1958 rcu_read_lock();
1959
1960 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1961
1962 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1963 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta) || !sta->wme)) {
1964 rcu_read_unlock();
1965 return;
1966 }
1967
1968 if (!WARN_ON_ONCE(!mvmsta)) {
1969 mvmsta->tid_data[tid].rate_n_flags =
1970 le32_to_cpu(tx_resp->initial_rate);
1971 mvmsta->tid_data[tid].tx_time =
1972 le16_to_cpu(tx_resp->wireless_media_time);
1973 mvmsta->tid_data[tid].lq_color =
1974 TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info);
1975 iwl_mvm_tx_airtime(mvm, mvmsta,
1976 le16_to_cpu(tx_resp->wireless_media_time));
1977 }
1978
1979 rcu_read_unlock();
1980}
1981
1982void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1983{
1984 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1985 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1986
1987 if (tx_resp->frame_count == 1)
1988 iwl_mvm_rx_tx_cmd_single(mvm, pkt);
1989 else
1990 iwl_mvm_rx_tx_cmd_agg(mvm, pkt);
1991}
1992
1993static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid,
1994 int txq, int index,
1995 struct ieee80211_tx_info *tx_info, u32 rate,
1996 bool is_flush)
1997{
1998 struct sk_buff_head reclaimed_skbs;
1999 struct iwl_mvm_tid_data *tid_data = NULL;
2000 struct ieee80211_sta *sta;
2001 struct iwl_mvm_sta *mvmsta = NULL;
2002 struct sk_buff *skb;
2003 int freed;
2004
2005 if (WARN_ONCE(sta_id >= mvm->fw->ucode_capa.num_stations ||
2006 tid > IWL_MAX_TID_COUNT,
2007 "sta_id %d tid %d", sta_id, tid))
2008 return;
2009
2010 rcu_read_lock();
2011
2012 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
2013
2014 /* Reclaiming frames for a station that has been deleted ? */
2015 if (WARN_ON_ONCE(!sta)) {
2016 rcu_read_unlock();
2017 return;
2018 }
2019
2020 __skb_queue_head_init(&reclaimed_skbs);
2021
2022 /*
2023 * Release all TFDs before the SSN, i.e. all TFDs in front of
2024 * block-ack window (we assume that they've been successfully
2025 * transmitted ... if not, it's too late anyway).
2026 */
2027 iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs, is_flush);
2028
2029 skb_queue_walk(&reclaimed_skbs, skb) {
2030 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2031
2032 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
2033
2034 memset(&info->status, 0, sizeof(info->status));
2035 /* Packet was transmitted successfully, failures come as single
2036 * frames because before failing a frame the firmware transmits
2037 * it without aggregation at least once.
2038 */
2039 if (!is_flush)
2040 info->flags |= IEEE80211_TX_STAT_ACK;
2041 else
2042 info->flags &= ~IEEE80211_TX_STAT_ACK;
2043 }
2044
2045 /*
2046 * It's possible to get a BA response after invalidating the rcu (rcu is
2047 * invalidated in order to prevent new Tx from being sent, but there may
2048 * be some frames already in-flight).
2049 * In this case we just want to reclaim, and could skip all the
2050 * sta-dependent stuff since it's in the middle of being removed
2051 * anyways.
2052 */
2053 if (IS_ERR(sta))
2054 goto out;
2055
2056 mvmsta = iwl_mvm_sta_from_mac80211(sta);
2057 tid_data = &mvmsta->tid_data[tid];
2058
2059 if (tid_data->txq_id != txq) {
2060 IWL_ERR(mvm,
2061 "invalid reclaim request: Q %d, tid %d\n",
2062 tid_data->txq_id, tid);
2063 rcu_read_unlock();
2064 return;
2065 }
2066
2067 spin_lock_bh(&mvmsta->lock);
2068
2069 tid_data->next_reclaimed = index;
2070
2071 iwl_mvm_check_ratid_empty(mvm, sta, tid);
2072
2073 freed = 0;
2074
2075 /* pack lq color from tid_data along the reduced txp */
2076 tx_info->status.status_driver_data[0] =
2077 RS_DRV_DATA_PACK(tid_data->lq_color,
2078 tx_info->status.status_driver_data[0]);
2079 tx_info->status.status_driver_data[1] = (void *)(uintptr_t)rate;
2080
2081 skb_queue_walk(&reclaimed_skbs, skb) {
2082 struct ieee80211_hdr *hdr = (void *)skb->data;
2083 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2084
2085 if (!is_flush) {
2086 if (ieee80211_is_data_qos(hdr->frame_control))
2087 freed++;
2088 else
2089 WARN_ON_ONCE(tid != IWL_MAX_TID_COUNT);
2090 }
2091
2092 /* this is the first skb we deliver in this batch */
2093 /* put the rate scaling data there */
2094 if (freed == 1) {
2095 info->flags |= IEEE80211_TX_STAT_AMPDU;
2096 memcpy(&info->status, &tx_info->status,
2097 sizeof(tx_info->status));
2098 iwl_mvm_hwrate_to_tx_status(mvm->fw, rate, info);
2099 }
2100 }
2101
2102 spin_unlock_bh(&mvmsta->lock);
2103
2104 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is
2105 * possible (i.e. first MPDU in the aggregation wasn't acked)
2106 * Still it's important to update RS about sent vs. acked.
2107 */
2108 if (!is_flush && skb_queue_empty(&reclaimed_skbs) &&
2109 !iwl_mvm_has_tlc_offload(mvm)) {
2110 struct ieee80211_chanctx_conf *chanctx_conf = NULL;
2111
2112 /* no TLC offload, so non-MLD mode */
2113 if (mvmsta->vif)
2114 chanctx_conf =
2115 rcu_dereference(mvmsta->vif->bss_conf.chanctx_conf);
2116
2117 if (WARN_ON_ONCE(!chanctx_conf))
2118 goto out;
2119
2120 tx_info->band = chanctx_conf->def.chan->band;
2121 iwl_mvm_hwrate_to_tx_status(mvm->fw, rate, tx_info);
2122
2123 IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n");
2124 iwl_mvm_rs_tx_status(mvm, sta, tid, tx_info, false);
2125 }
2126
2127out:
2128 rcu_read_unlock();
2129
2130 while (!skb_queue_empty(&reclaimed_skbs)) {
2131 skb = __skb_dequeue(&reclaimed_skbs);
2132 ieee80211_tx_status_skb(mvm->hw, skb);
2133 }
2134}
2135
2136void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
2137{
2138 struct iwl_rx_packet *pkt = rxb_addr(rxb);
2139 unsigned int pkt_len = iwl_rx_packet_payload_len(pkt);
2140 int sta_id, tid, txq, index;
2141 struct ieee80211_tx_info ba_info = {};
2142 struct iwl_mvm_ba_notif *ba_notif;
2143 struct iwl_mvm_tid_data *tid_data;
2144 struct iwl_mvm_sta *mvmsta;
2145
2146 ba_info.flags = IEEE80211_TX_STAT_AMPDU;
2147
2148 if (iwl_mvm_has_new_tx_api(mvm)) {
2149 struct iwl_mvm_compressed_ba_notif *ba_res =
2150 (void *)pkt->data;
2151 u8 lq_color = TX_RES_RATE_TABLE_COL_GET(ba_res->tlc_rate_info);
2152 u16 tfd_cnt;
2153 int i;
2154
2155 if (IWL_FW_CHECK(mvm, sizeof(*ba_res) > pkt_len,
2156 "short BA notification (%d)\n", pkt_len))
2157 return;
2158
2159 sta_id = ba_res->sta_id;
2160 ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done);
2161 ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed);
2162 ba_info.status.tx_time =
2163 (u16)le32_to_cpu(ba_res->wireless_time);
2164 ba_info.status.status_driver_data[0] =
2165 (void *)(uintptr_t)ba_res->reduced_txp;
2166
2167 tfd_cnt = le16_to_cpu(ba_res->tfd_cnt);
2168 if (!tfd_cnt)
2169 return;
2170
2171 if (IWL_FW_CHECK(mvm,
2172 struct_size(ba_res, tfd, tfd_cnt) > pkt_len,
2173 "short BA notification (tfds:%d, size:%d)\n",
2174 tfd_cnt, pkt_len))
2175 return;
2176
2177 rcu_read_lock();
2178
2179 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
2180 /*
2181 * It's possible to get a BA response after invalidating the rcu
2182 * (rcu is invalidated in order to prevent new Tx from being
2183 * sent, but there may be some frames already in-flight).
2184 * In this case we just want to reclaim, and could skip all the
2185 * sta-dependent stuff since it's in the middle of being removed
2186 * anyways.
2187 */
2188
2189 /* Free per TID */
2190 for (i = 0; i < tfd_cnt; i++) {
2191 struct iwl_mvm_compressed_ba_tfd *ba_tfd =
2192 &ba_res->tfd[i];
2193
2194 tid = ba_tfd->tid;
2195 if (tid == IWL_MGMT_TID)
2196 tid = IWL_MAX_TID_COUNT;
2197
2198 if (mvmsta)
2199 mvmsta->tid_data[i].lq_color = lq_color;
2200
2201 iwl_mvm_tx_reclaim(mvm, sta_id, tid,
2202 (int)(le16_to_cpu(ba_tfd->q_num)),
2203 le16_to_cpu(ba_tfd->tfd_index),
2204 &ba_info,
2205 le32_to_cpu(ba_res->tx_rate), false);
2206 }
2207
2208 if (mvmsta)
2209 iwl_mvm_tx_airtime(mvm, mvmsta,
2210 le32_to_cpu(ba_res->wireless_time));
2211 rcu_read_unlock();
2212
2213 IWL_DEBUG_TX_REPLY(mvm,
2214 "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n",
2215 sta_id, le32_to_cpu(ba_res->flags),
2216 le16_to_cpu(ba_res->txed),
2217 le16_to_cpu(ba_res->done));
2218 return;
2219 }
2220
2221 ba_notif = (void *)pkt->data;
2222 sta_id = ba_notif->sta_id;
2223 tid = ba_notif->tid;
2224 /* "flow" corresponds to Tx queue */
2225 txq = le16_to_cpu(ba_notif->scd_flow);
2226 /* "ssn" is start of block-ack Tx window, corresponds to index
2227 * (in Tx queue's circular buffer) of first TFD/frame in window */
2228 index = le16_to_cpu(ba_notif->scd_ssn);
2229
2230 rcu_read_lock();
2231 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
2232 if (IWL_FW_CHECK(mvm, !mvmsta,
2233 "invalid STA ID %d in BA notif\n",
2234 sta_id)) {
2235 rcu_read_unlock();
2236 return;
2237 }
2238
2239 tid_data = &mvmsta->tid_data[tid];
2240
2241 ba_info.status.ampdu_ack_len = ba_notif->txed_2_done;
2242 ba_info.status.ampdu_len = ba_notif->txed;
2243 ba_info.status.tx_time = tid_data->tx_time;
2244 ba_info.status.status_driver_data[0] =
2245 (void *)(uintptr_t)ba_notif->reduced_txp;
2246
2247 rcu_read_unlock();
2248
2249 iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info,
2250 tid_data->rate_n_flags, false);
2251
2252 IWL_DEBUG_TX_REPLY(mvm,
2253 "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
2254 ba_notif->sta_addr, ba_notif->sta_id);
2255
2256 IWL_DEBUG_TX_REPLY(mvm,
2257 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
2258 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl),
2259 le64_to_cpu(ba_notif->bitmap), txq, index,
2260 ba_notif->txed, ba_notif->txed_2_done);
2261
2262 IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n",
2263 ba_notif->reduced_txp);
2264}
2265
2266/*
2267 * Note that there are transports that buffer frames before they reach
2268 * the firmware. This means that after flush_tx_path is called, the
2269 * queue might not be empty. The race-free way to handle this is to:
2270 * 1) set the station as draining
2271 * 2) flush the Tx path
2272 * 3) wait for the transport queues to be empty
2273 */
2274int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk)
2275{
2276 int ret;
2277 struct iwl_tx_path_flush_cmd_v1 flush_cmd = {
2278 .queues_ctl = cpu_to_le32(tfd_msk),
2279 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH),
2280 };
2281
2282 WARN_ON(iwl_mvm_has_new_tx_api(mvm));
2283 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, 0,
2284 sizeof(flush_cmd), &flush_cmd);
2285 if (ret)
2286 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
2287 return ret;
2288}
2289
2290int iwl_mvm_flush_sta_tids(struct iwl_mvm *mvm, u32 sta_id, u16 tids)
2291{
2292 int ret;
2293 struct iwl_tx_path_flush_cmd_rsp *rsp;
2294 struct iwl_tx_path_flush_cmd flush_cmd = {
2295 .sta_id = cpu_to_le32(sta_id),
2296 .tid_mask = cpu_to_le16(tids),
2297 };
2298
2299 struct iwl_host_cmd cmd = {
2300 .id = TXPATH_FLUSH,
2301 .len = { sizeof(flush_cmd), },
2302 .data = { &flush_cmd, },
2303 };
2304
2305 WARN_ON(!iwl_mvm_has_new_tx_api(mvm));
2306
2307 if (iwl_fw_lookup_notif_ver(mvm->fw, LONG_GROUP, TXPATH_FLUSH, 0) > 0)
2308 cmd.flags |= CMD_WANT_SKB | CMD_SEND_IN_RFKILL;
2309
2310 IWL_DEBUG_TX_QUEUES(mvm, "flush for sta id %d tid mask 0x%x\n",
2311 sta_id, tids);
2312
2313 ret = iwl_mvm_send_cmd(mvm, &cmd);
2314
2315 if (ret) {
2316 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
2317 return ret;
2318 }
2319
2320 if (cmd.flags & CMD_WANT_SKB) {
2321 int i;
2322 int num_flushed_queues;
2323
2324 if (WARN_ON_ONCE(iwl_rx_packet_payload_len(cmd.resp_pkt) != sizeof(*rsp))) {
2325 ret = -EIO;
2326 goto free_rsp;
2327 }
2328
2329 rsp = (void *)cmd.resp_pkt->data;
2330
2331 if (WARN_ONCE(le16_to_cpu(rsp->sta_id) != sta_id,
2332 "sta_id %d != rsp_sta_id %d",
2333 sta_id, le16_to_cpu(rsp->sta_id))) {
2334 ret = -EIO;
2335 goto free_rsp;
2336 }
2337
2338 num_flushed_queues = le16_to_cpu(rsp->num_flushed_queues);
2339 if (WARN_ONCE(num_flushed_queues > IWL_TX_FLUSH_QUEUE_RSP,
2340 "num_flushed_queues %d", num_flushed_queues)) {
2341 ret = -EIO;
2342 goto free_rsp;
2343 }
2344
2345 for (i = 0; i < num_flushed_queues; i++) {
2346 struct ieee80211_tx_info tx_info = {};
2347 struct iwl_flush_queue_info *queue_info = &rsp->queues[i];
2348 int tid = le16_to_cpu(queue_info->tid);
2349 int read_before = le16_to_cpu(queue_info->read_before_flush);
2350 int read_after = le16_to_cpu(queue_info->read_after_flush);
2351 int queue_num = le16_to_cpu(queue_info->queue_num);
2352
2353 if (tid == IWL_MGMT_TID)
2354 tid = IWL_MAX_TID_COUNT;
2355
2356 IWL_DEBUG_TX_QUEUES(mvm,
2357 "tid %d queue_id %d read-before %d read-after %d\n",
2358 tid, queue_num, read_before, read_after);
2359
2360 iwl_mvm_tx_reclaim(mvm, sta_id, tid, queue_num, read_after,
2361 &tx_info, 0, true);
2362 }
2363free_rsp:
2364 iwl_free_resp(&cmd);
2365 }
2366 return ret;
2367}
2368
2369int iwl_mvm_flush_sta(struct iwl_mvm *mvm, u32 sta_id, u32 tfd_queue_mask)
2370{
2371 if (iwl_mvm_has_new_tx_api(mvm))
2372 return iwl_mvm_flush_sta_tids(mvm, sta_id, 0xffff);
2373
2374 return iwl_mvm_flush_tx_path(mvm, tfd_queue_mask);
2375}
1/******************************************************************************
2 *
3 * This file is provided under a dual BSD/GPLv2 license. When using or
4 * redistributing this file, you may do so under either license.
5 *
6 * GPL LICENSE SUMMARY
7 *
8 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
9 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
10 * Copyright(c) 2016 Intel Deutschland GmbH
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of version 2 of the GNU General Public License as
14 * published by the Free Software Foundation.
15 *
16 * This program is distributed in the hope that it will be useful, but
17 * WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 * General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
24 * USA
25 *
26 * The full GNU General Public License is included in this distribution
27 * in the file called COPYING.
28 *
29 * Contact Information:
30 * Intel Linux Wireless <linuxwifi@intel.com>
31 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
32 *
33 * BSD LICENSE
34 *
35 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
36 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
37 * All rights reserved.
38 *
39 * Redistribution and use in source and binary forms, with or without
40 * modification, are permitted provided that the following conditions
41 * are met:
42 *
43 * * Redistributions of source code must retain the above copyright
44 * notice, this list of conditions and the following disclaimer.
45 * * Redistributions in binary form must reproduce the above copyright
46 * notice, this list of conditions and the following disclaimer in
47 * the documentation and/or other materials provided with the
48 * distribution.
49 * * Neither the name Intel Corporation nor the names of its
50 * contributors may be used to endorse or promote products derived
51 * from this software without specific prior written permission.
52 *
53 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
54 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
55 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
56 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
57 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
58 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
59 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
60 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
61 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
62 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
63 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
64 *
65 *****************************************************************************/
66#include <linux/ieee80211.h>
67#include <linux/etherdevice.h>
68#include <linux/tcp.h>
69#include <net/ip.h>
70#include <net/ipv6.h>
71
72#include "iwl-trans.h"
73#include "iwl-eeprom-parse.h"
74#include "mvm.h"
75#include "sta.h"
76#include "fw-dbg.h"
77
78static void
79iwl_mvm_bar_check_trigger(struct iwl_mvm *mvm, const u8 *addr,
80 u16 tid, u16 ssn)
81{
82 struct iwl_fw_dbg_trigger_tlv *trig;
83 struct iwl_fw_dbg_trigger_ba *ba_trig;
84
85 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
86 return;
87
88 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
89 ba_trig = (void *)trig->data;
90
91 if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig))
92 return;
93
94 if (!(le16_to_cpu(ba_trig->tx_bar) & BIT(tid)))
95 return;
96
97 iwl_mvm_fw_dbg_collect_trig(mvm, trig,
98 "BAR sent to %pM, tid %d, ssn %d",
99 addr, tid, ssn);
100}
101
102#define OPT_HDR(type, skb, off) \
103 (type *)(skb_network_header(skb) + (off))
104
105static void iwl_mvm_tx_csum(struct iwl_mvm *mvm, struct sk_buff *skb,
106 struct ieee80211_hdr *hdr,
107 struct ieee80211_tx_info *info,
108 struct iwl_tx_cmd *tx_cmd)
109{
110#if IS_ENABLED(CONFIG_INET)
111 u16 mh_len = ieee80211_hdrlen(hdr->frame_control);
112 u16 offload_assist = le16_to_cpu(tx_cmd->offload_assist);
113 u8 protocol = 0;
114
115 /*
116 * Do not compute checksum if already computed or if transport will
117 * compute it
118 */
119 if (skb->ip_summed != CHECKSUM_PARTIAL || IWL_MVM_SW_TX_CSUM_OFFLOAD)
120 return;
121
122 /* We do not expect to be requested to csum stuff we do not support */
123 if (WARN_ONCE(!(mvm->hw->netdev_features & IWL_TX_CSUM_NETIF_FLAGS) ||
124 (skb->protocol != htons(ETH_P_IP) &&
125 skb->protocol != htons(ETH_P_IPV6)),
126 "No support for requested checksum\n")) {
127 skb_checksum_help(skb);
128 return;
129 }
130
131 if (skb->protocol == htons(ETH_P_IP)) {
132 protocol = ip_hdr(skb)->protocol;
133 } else {
134#if IS_ENABLED(CONFIG_IPV6)
135 struct ipv6hdr *ipv6h =
136 (struct ipv6hdr *)skb_network_header(skb);
137 unsigned int off = sizeof(*ipv6h);
138
139 protocol = ipv6h->nexthdr;
140 while (protocol != NEXTHDR_NONE && ipv6_ext_hdr(protocol)) {
141 struct ipv6_opt_hdr *hp;
142
143 /* only supported extension headers */
144 if (protocol != NEXTHDR_ROUTING &&
145 protocol != NEXTHDR_HOP &&
146 protocol != NEXTHDR_DEST) {
147 skb_checksum_help(skb);
148 return;
149 }
150
151 hp = OPT_HDR(struct ipv6_opt_hdr, skb, off);
152 protocol = hp->nexthdr;
153 off += ipv6_optlen(hp);
154 }
155 /* if we get here - protocol now should be TCP/UDP */
156#endif
157 }
158
159 if (protocol != IPPROTO_TCP && protocol != IPPROTO_UDP) {
160 WARN_ON_ONCE(1);
161 skb_checksum_help(skb);
162 return;
163 }
164
165 /* enable L4 csum */
166 offload_assist |= BIT(TX_CMD_OFFLD_L4_EN);
167
168 /*
169 * Set offset to IP header (snap).
170 * We don't support tunneling so no need to take care of inner header.
171 * Size is in words.
172 */
173 offload_assist |= (4 << TX_CMD_OFFLD_IP_HDR);
174
175 /* Do IPv4 csum for AMSDU only (no IP csum for Ipv6) */
176 if (skb->protocol == htons(ETH_P_IP) &&
177 (offload_assist & BIT(TX_CMD_OFFLD_AMSDU))) {
178 ip_hdr(skb)->check = 0;
179 offload_assist |= BIT(TX_CMD_OFFLD_L3_EN);
180 }
181
182 /* reset UDP/TCP header csum */
183 if (protocol == IPPROTO_TCP)
184 tcp_hdr(skb)->check = 0;
185 else
186 udp_hdr(skb)->check = 0;
187
188 /* mac header len should include IV, size is in words */
189 if (info->control.hw_key)
190 mh_len += info->control.hw_key->iv_len;
191 mh_len /= 2;
192 offload_assist |= mh_len << TX_CMD_OFFLD_MH_SIZE;
193
194 tx_cmd->offload_assist = cpu_to_le16(offload_assist);
195#endif
196}
197
198/*
199 * Sets most of the Tx cmd's fields
200 */
201void 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_tx_info *skb_info = IEEE80211_SKB_CB(skb);
206 struct ieee80211_hdr *hdr = (void *)skb->data;
207 __le16 fc = hdr->frame_control;
208 u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags);
209 u32 len = skb->len + FCS_LEN;
210 u8 ac;
211
212 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
213 tx_flags |= TX_CMD_FLG_ACK;
214 else
215 tx_flags &= ~TX_CMD_FLG_ACK;
216
217 if (ieee80211_is_probe_resp(fc))
218 tx_flags |= TX_CMD_FLG_TSF;
219
220 if (ieee80211_has_morefrags(fc))
221 tx_flags |= TX_CMD_FLG_MORE_FRAG;
222
223 if (ieee80211_is_data_qos(fc)) {
224 u8 *qc = ieee80211_get_qos_ctl(hdr);
225 tx_cmd->tid_tspec = qc[0] & 0xf;
226 tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
227 if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT)
228 tx_cmd->offload_assist |=
229 cpu_to_le16(BIT(TX_CMD_OFFLD_AMSDU));
230 } else if (ieee80211_is_back_req(fc)) {
231 struct ieee80211_bar *bar = (void *)skb->data;
232 u16 control = le16_to_cpu(bar->control);
233 u16 ssn = le16_to_cpu(bar->start_seq_num);
234
235 tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR;
236 tx_cmd->tid_tspec = (control &
237 IEEE80211_BAR_CTRL_TID_INFO_MASK) >>
238 IEEE80211_BAR_CTRL_TID_INFO_SHIFT;
239 WARN_ON_ONCE(tx_cmd->tid_tspec >= IWL_MAX_TID_COUNT);
240 iwl_mvm_bar_check_trigger(mvm, bar->ra, tx_cmd->tid_tspec,
241 ssn);
242 } else {
243 tx_cmd->tid_tspec = IWL_TID_NON_QOS;
244 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
245 tx_flags |= TX_CMD_FLG_SEQ_CTL;
246 else
247 tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
248 }
249
250 /* Default to 0 (BE) when tid_spec is set to IWL_TID_NON_QOS */
251 if (tx_cmd->tid_tspec < IWL_MAX_TID_COUNT)
252 ac = tid_to_mac80211_ac[tx_cmd->tid_tspec];
253 else
254 ac = tid_to_mac80211_ac[0];
255
256 tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) <<
257 TX_CMD_FLG_BT_PRIO_POS;
258
259 if (ieee80211_is_mgmt(fc)) {
260 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
261 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_ASSOC);
262 else if (ieee80211_is_action(fc))
263 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
264 else
265 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
266
267 /* The spec allows Action frames in A-MPDU, we don't support
268 * it
269 */
270 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU);
271 } else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) {
272 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
273 } else {
274 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
275 }
276
277 if (ieee80211_is_data(fc) && len > mvm->rts_threshold &&
278 !is_multicast_ether_addr(ieee80211_get_DA(hdr)))
279 tx_flags |= TX_CMD_FLG_PROT_REQUIRE;
280
281 if (fw_has_capa(&mvm->fw->ucode_capa,
282 IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT) &&
283 ieee80211_action_contains_tpc(skb))
284 tx_flags |= TX_CMD_FLG_WRITE_TX_POWER;
285
286 tx_cmd->tx_flags = cpu_to_le32(tx_flags);
287 /* Total # bytes to be transmitted */
288 tx_cmd->len = cpu_to_le16((u16)skb->len +
289 (uintptr_t)skb_info->driver_data[0]);
290 tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
291 tx_cmd->sta_id = sta_id;
292
293 /* padding is inserted later in transport */
294 if (ieee80211_hdrlen(fc) % 4 &&
295 !(tx_cmd->offload_assist & cpu_to_le16(BIT(TX_CMD_OFFLD_AMSDU))))
296 tx_cmd->offload_assist |= cpu_to_le16(BIT(TX_CMD_OFFLD_PAD));
297
298 iwl_mvm_tx_csum(mvm, skb, hdr, info, tx_cmd);
299}
300
301/*
302 * Sets the fields in the Tx cmd that are rate related
303 */
304void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd,
305 struct ieee80211_tx_info *info,
306 struct ieee80211_sta *sta, __le16 fc)
307{
308 u32 rate_flags;
309 int rate_idx;
310 u8 rate_plcp;
311
312 /* Set retry limit on RTS packets */
313 tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT;
314
315 /* Set retry limit on DATA packets and Probe Responses*/
316 if (ieee80211_is_probe_resp(fc)) {
317 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT;
318 tx_cmd->rts_retry_limit =
319 min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit);
320 } else if (ieee80211_is_back_req(fc)) {
321 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT;
322 } else {
323 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY;
324 }
325
326 /*
327 * for data packets, rate info comes from the table inside the fw. This
328 * table is controlled by LINK_QUALITY commands
329 */
330
331 if (ieee80211_is_data(fc) && sta) {
332 tx_cmd->initial_rate_index = 0;
333 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE);
334 return;
335 } else if (ieee80211_is_back_req(fc)) {
336 tx_cmd->tx_flags |=
337 cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR);
338 }
339
340 /* HT rate doesn't make sense for a non data frame */
341 WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS,
342 "Got an HT rate (flags:0x%x/mcs:%d) for a non data frame (fc:0x%x)\n",
343 info->control.rates[0].flags,
344 info->control.rates[0].idx,
345 le16_to_cpu(fc));
346
347 rate_idx = info->control.rates[0].idx;
348 /* if the rate isn't a well known legacy rate, take the lowest one */
349 if (rate_idx < 0 || rate_idx >= IWL_RATE_COUNT_LEGACY)
350 rate_idx = rate_lowest_index(
351 &mvm->nvm_data->bands[info->band], sta);
352
353 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
354 if (info->band == NL80211_BAND_5GHZ)
355 rate_idx += IWL_FIRST_OFDM_RATE;
356
357 /* For 2.4 GHZ band, check that there is no need to remap */
358 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
359
360 /* Get PLCP rate for tx_cmd->rate_n_flags */
361 rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(rate_idx);
362
363 mvm->mgmt_last_antenna_idx =
364 iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm),
365 mvm->mgmt_last_antenna_idx);
366
367 if (info->band == NL80211_BAND_2GHZ &&
368 !iwl_mvm_bt_coex_is_shared_ant_avail(mvm))
369 rate_flags = mvm->cfg->non_shared_ant << RATE_MCS_ANT_POS;
370 else
371 rate_flags =
372 BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS;
373
374 /* Set CCK flag as needed */
375 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
376 rate_flags |= RATE_MCS_CCK_MSK;
377
378 /* Set the rate in the TX cmd */
379 tx_cmd->rate_n_flags = cpu_to_le32((u32)rate_plcp | rate_flags);
380}
381
382static inline void iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info *info,
383 u8 *crypto_hdr)
384{
385 struct ieee80211_key_conf *keyconf = info->control.hw_key;
386 u64 pn;
387
388 pn = atomic64_inc_return(&keyconf->tx_pn);
389 crypto_hdr[0] = pn;
390 crypto_hdr[2] = 0;
391 crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6);
392 crypto_hdr[1] = pn >> 8;
393 crypto_hdr[4] = pn >> 16;
394 crypto_hdr[5] = pn >> 24;
395 crypto_hdr[6] = pn >> 32;
396 crypto_hdr[7] = pn >> 40;
397}
398
399/*
400 * Sets the fields in the Tx cmd that are crypto related
401 */
402static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm,
403 struct ieee80211_tx_info *info,
404 struct iwl_tx_cmd *tx_cmd,
405 struct sk_buff *skb_frag,
406 int hdrlen)
407{
408 struct ieee80211_key_conf *keyconf = info->control.hw_key;
409 u8 *crypto_hdr = skb_frag->data + hdrlen;
410 u64 pn;
411
412 switch (keyconf->cipher) {
413 case WLAN_CIPHER_SUITE_CCMP:
414 case WLAN_CIPHER_SUITE_CCMP_256:
415 iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd);
416 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr);
417 break;
418
419 case WLAN_CIPHER_SUITE_TKIP:
420 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
421 pn = atomic64_inc_return(&keyconf->tx_pn);
422 ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn);
423 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
424 break;
425
426 case WLAN_CIPHER_SUITE_WEP104:
427 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
428 /* fall through */
429 case WLAN_CIPHER_SUITE_WEP40:
430 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP |
431 ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) &
432 TX_CMD_SEC_WEP_KEY_IDX_MSK);
433
434 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
435 break;
436 case WLAN_CIPHER_SUITE_GCMP:
437 case WLAN_CIPHER_SUITE_GCMP_256:
438 /* TODO: Taking the key from the table might introduce a race
439 * when PTK rekeying is done, having an old packets with a PN
440 * based on the old key but the message encrypted with a new
441 * one.
442 * Need to handle this.
443 */
444 tx_cmd->sec_ctl |= TX_CMD_SEC_GCMP | TX_CMD_SEC_KEY_FROM_TABLE;
445 tx_cmd->key[0] = keyconf->hw_key_idx;
446 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr);
447 break;
448 default:
449 tx_cmd->sec_ctl |= TX_CMD_SEC_EXT;
450 }
451}
452
453/*
454 * Allocates and sets the Tx cmd the driver data pointers in the skb
455 */
456static struct iwl_device_cmd *
457iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb,
458 struct ieee80211_tx_info *info, int hdrlen,
459 struct ieee80211_sta *sta, u8 sta_id)
460{
461 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
462 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb);
463 struct iwl_device_cmd *dev_cmd;
464 struct iwl_tx_cmd *tx_cmd;
465
466 dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans);
467
468 if (unlikely(!dev_cmd))
469 return NULL;
470
471 memset(dev_cmd, 0, sizeof(*dev_cmd));
472 dev_cmd->hdr.cmd = TX_CMD;
473 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
474
475 if (info->control.hw_key)
476 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen);
477
478 iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id);
479
480 iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control);
481
482 memset(&skb_info->status, 0, sizeof(skb_info->status));
483 memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data));
484
485 skb_info->driver_data[1] = dev_cmd;
486
487 return dev_cmd;
488}
489
490static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm,
491 struct ieee80211_tx_info *info, __le16 fc)
492{
493 if (!iwl_mvm_is_dqa_supported(mvm))
494 return info->hw_queue;
495
496 switch (info->control.vif->type) {
497 case NL80211_IFTYPE_AP:
498 /*
499 * handle legacy hostapd as well, where station may be added
500 * only after assoc.
501 */
502 if (ieee80211_is_probe_resp(fc) || ieee80211_is_auth(fc))
503 return IWL_MVM_DQA_AP_PROBE_RESP_QUEUE;
504 if (info->hw_queue == info->control.vif->cab_queue)
505 return info->hw_queue;
506
507 WARN_ON_ONCE(1);
508 return IWL_MVM_DQA_AP_PROBE_RESP_QUEUE;
509 case NL80211_IFTYPE_P2P_DEVICE:
510 if (ieee80211_is_mgmt(fc))
511 return IWL_MVM_DQA_P2P_DEVICE_QUEUE;
512 if (info->hw_queue == info->control.vif->cab_queue)
513 return info->hw_queue;
514
515 WARN_ON_ONCE(1);
516 return IWL_MVM_DQA_P2P_DEVICE_QUEUE;
517 default:
518 WARN_ONCE(1, "Not a ctrl vif, no available queue\n");
519 return -1;
520 }
521}
522
523int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb)
524{
525 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
526 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb);
527 struct ieee80211_tx_info info;
528 struct iwl_device_cmd *dev_cmd;
529 struct iwl_tx_cmd *tx_cmd;
530 u8 sta_id;
531 int hdrlen = ieee80211_hdrlen(hdr->frame_control);
532 int queue;
533
534 /* IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets that can be used
535 * in 2 different types of vifs, P2P & STATION. P2P uses the offchannel
536 * queue. STATION (HS2.0) uses the auxiliary context of the FW,
537 * and hence needs to be sent on the aux queue
538 */
539 if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
540 skb_info->control.vif->type == NL80211_IFTYPE_STATION)
541 IEEE80211_SKB_CB(skb)->hw_queue = mvm->aux_queue;
542
543 memcpy(&info, skb->cb, sizeof(info));
544
545 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU))
546 return -1;
547
548 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM &&
549 (!info.control.vif ||
550 info.hw_queue != info.control.vif->cab_queue)))
551 return -1;
552
553 /* This holds the amsdu headers length */
554 skb_info->driver_data[0] = (void *)(uintptr_t)0;
555
556 queue = info.hw_queue;
557
558 /*
559 * If the interface on which the frame is sent is the P2P_DEVICE
560 * or an AP/GO interface use the broadcast station associated
561 * with it; otherwise if the interface is a managed interface
562 * use the AP station associated with it for multicast traffic
563 * (this is not possible for unicast packets as a TLDS discovery
564 * response are sent without a station entry); otherwise use the
565 * AUX station.
566 * In DQA mode, if vif is of type STATION and frames are not multicast,
567 * they should be sent from the BSS queue. For example, TDLS setup
568 * frames should be sent on this queue, as they go through the AP.
569 */
570 sta_id = mvm->aux_sta.sta_id;
571 if (info.control.vif) {
572 struct iwl_mvm_vif *mvmvif =
573 iwl_mvm_vif_from_mac80211(info.control.vif);
574
575 if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE ||
576 info.control.vif->type == NL80211_IFTYPE_AP) {
577 sta_id = mvmvif->bcast_sta.sta_id;
578 queue = iwl_mvm_get_ctrl_vif_queue(mvm, &info,
579 hdr->frame_control);
580 if (queue < 0)
581 return -1;
582
583 } else if (info.control.vif->type == NL80211_IFTYPE_STATION &&
584 is_multicast_ether_addr(hdr->addr1)) {
585 u8 ap_sta_id = ACCESS_ONCE(mvmvif->ap_sta_id);
586
587 if (ap_sta_id != IWL_MVM_STATION_COUNT)
588 sta_id = ap_sta_id;
589 } else if (iwl_mvm_is_dqa_supported(mvm) &&
590 info.control.vif->type == NL80211_IFTYPE_STATION) {
591 queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE;
592 }
593 }
594
595 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue);
596
597 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id);
598 if (!dev_cmd)
599 return -1;
600
601 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
602
603 /* Copy MAC header from skb into command buffer */
604 memcpy(tx_cmd->hdr, hdr, hdrlen);
605
606 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) {
607 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
608 return -1;
609 }
610
611 /*
612 * Increase the pending frames counter, so that later when a reply comes
613 * in and the counter is decreased - we don't start getting negative
614 * values.
615 * Note that we don't need to make sure it isn't agg'd, since we're
616 * TXing non-sta
617 */
618 atomic_inc(&mvm->pending_frames[sta_id]);
619
620 return 0;
621}
622
623#ifdef CONFIG_INET
624static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
625 struct ieee80211_tx_info *info,
626 struct ieee80211_sta *sta,
627 struct sk_buff_head *mpdus_skb)
628{
629 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
630 struct ieee80211_hdr *hdr = (void *)skb->data;
631 unsigned int mss = skb_shinfo(skb)->gso_size;
632 struct sk_buff *tmp, *next;
633 char cb[sizeof(skb->cb)];
634 unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len;
635 bool ipv4 = (skb->protocol == htons(ETH_P_IP));
636 u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0;
637 u16 amsdu_add, snap_ip_tcp, pad, i = 0;
638 unsigned int dbg_max_amsdu_len;
639 netdev_features_t netdev_features = NETIF_F_CSUM_MASK | NETIF_F_SG;
640 u8 *qc, tid, txf;
641
642 snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) +
643 tcp_hdrlen(skb);
644
645 qc = ieee80211_get_qos_ctl(hdr);
646 tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
647 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
648 return -EINVAL;
649
650 dbg_max_amsdu_len = ACCESS_ONCE(mvm->max_amsdu_len);
651
652 if (!sta->max_amsdu_len ||
653 !ieee80211_is_data_qos(hdr->frame_control) ||
654 (!mvmsta->tlc_amsdu && !dbg_max_amsdu_len)) {
655 num_subframes = 1;
656 pad = 0;
657 goto segment;
658 }
659
660 /*
661 * Do not build AMSDU for IPv6 with extension headers.
662 * ask stack to segment and checkum the generated MPDUs for us.
663 */
664 if (skb->protocol == htons(ETH_P_IPV6) &&
665 ((struct ipv6hdr *)skb_network_header(skb))->nexthdr !=
666 IPPROTO_TCP) {
667 num_subframes = 1;
668 pad = 0;
669 netdev_features &= ~NETIF_F_CSUM_MASK;
670 goto segment;
671 }
672
673 /*
674 * No need to lock amsdu_in_ampdu_allowed since it can't be modified
675 * during an BA session.
676 */
677 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
678 !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) {
679 num_subframes = 1;
680 pad = 0;
681 goto segment;
682 }
683
684 max_amsdu_len = sta->max_amsdu_len;
685
686 /* the Tx FIFO to which this A-MSDU will be routed */
687 txf = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
688
689 /*
690 * Don't send an AMSDU that will be longer than the TXF.
691 * Add a security margin of 256 for the TX command + headers.
692 * We also want to have the start of the next packet inside the
693 * fifo to be able to send bursts.
694 */
695 max_amsdu_len = min_t(unsigned int, max_amsdu_len,
696 mvm->shared_mem_cfg.txfifo_size[txf] - 256);
697
698 if (unlikely(dbg_max_amsdu_len))
699 max_amsdu_len = min_t(unsigned int, max_amsdu_len,
700 dbg_max_amsdu_len);
701
702 /*
703 * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not
704 * supported. This is a spec requirement (IEEE 802.11-2015
705 * section 8.7.3 NOTE 3).
706 */
707 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
708 !sta->vht_cap.vht_supported)
709 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095);
710
711 /* Sub frame header + SNAP + IP header + TCP header + MSS */
712 subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss;
713 pad = (4 - subf_len) & 0x3;
714
715 /*
716 * If we have N subframes in the A-MSDU, then the A-MSDU's size is
717 * N * subf_len + (N - 1) * pad.
718 */
719 num_subframes = (max_amsdu_len + pad) / (subf_len + pad);
720 if (num_subframes > 1)
721 *qc |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
722
723 tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
724 tcp_hdrlen(skb) + skb->data_len;
725
726 /*
727 * Make sure we have enough TBs for the A-MSDU:
728 * 2 for each subframe
729 * 1 more for each fragment
730 * 1 more for the potential data in the header
731 */
732 num_subframes =
733 min_t(unsigned int, num_subframes,
734 (mvm->trans->max_skb_frags - 1 -
735 skb_shinfo(skb)->nr_frags) / 2);
736
737 /* This skb fits in one single A-MSDU */
738 if (num_subframes * mss >= tcp_payload_len) {
739 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb);
740
741 /*
742 * Compute the length of all the data added for the A-MSDU.
743 * This will be used to compute the length to write in the TX
744 * command. We have: SNAP + IP + TCP for n -1 subframes and
745 * ETH header for n subframes. Note that the original skb
746 * already had one set of SNAP / IP / TCP headers.
747 */
748 num_subframes = DIV_ROUND_UP(tcp_payload_len, mss);
749 amsdu_add = num_subframes * sizeof(struct ethhdr) +
750 (num_subframes - 1) * (snap_ip_tcp + pad);
751 /* This holds the amsdu headers length */
752 skb_info->driver_data[0] = (void *)(uintptr_t)amsdu_add;
753
754 __skb_queue_tail(mpdus_skb, skb);
755 return 0;
756 }
757
758 /*
759 * Trick the segmentation function to make it
760 * create SKBs that can fit into one A-MSDU.
761 */
762segment:
763 skb_shinfo(skb)->gso_size = num_subframes * mss;
764 memcpy(cb, skb->cb, sizeof(cb));
765
766 next = skb_gso_segment(skb, netdev_features);
767 skb_shinfo(skb)->gso_size = mss;
768 if (WARN_ON_ONCE(IS_ERR(next)))
769 return -EINVAL;
770 else if (next)
771 consume_skb(skb);
772
773 while (next) {
774 tmp = next;
775 next = tmp->next;
776
777 memcpy(tmp->cb, cb, sizeof(tmp->cb));
778 /*
779 * Compute the length of all the data added for the A-MSDU.
780 * This will be used to compute the length to write in the TX
781 * command. We have: SNAP + IP + TCP for n -1 subframes and
782 * ETH header for n subframes.
783 */
784 tcp_payload_len = skb_tail_pointer(tmp) -
785 skb_transport_header(tmp) -
786 tcp_hdrlen(tmp) + tmp->data_len;
787
788 if (ipv4)
789 ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes);
790
791 if (tcp_payload_len > mss) {
792 struct ieee80211_tx_info *skb_info =
793 IEEE80211_SKB_CB(tmp);
794
795 num_subframes = DIV_ROUND_UP(tcp_payload_len, mss);
796 amsdu_add = num_subframes * sizeof(struct ethhdr) +
797 (num_subframes - 1) * (snap_ip_tcp + pad);
798 skb_info->driver_data[0] =
799 (void *)(uintptr_t)amsdu_add;
800 skb_shinfo(tmp)->gso_size = mss;
801 } else {
802 qc = ieee80211_get_qos_ctl((void *)tmp->data);
803
804 if (ipv4)
805 ip_send_check(ip_hdr(tmp));
806 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
807 skb_shinfo(tmp)->gso_size = 0;
808 }
809
810 tmp->prev = NULL;
811 tmp->next = NULL;
812
813 __skb_queue_tail(mpdus_skb, tmp);
814 i++;
815 }
816
817 return 0;
818}
819#else /* CONFIG_INET */
820static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
821 struct ieee80211_tx_info *info,
822 struct ieee80211_sta *sta,
823 struct sk_buff_head *mpdus_skb)
824{
825 /* Impossible to get TSO with CONFIG_INET */
826 WARN_ON(1);
827
828 return -1;
829}
830#endif
831
832static void iwl_mvm_tx_add_stream(struct iwl_mvm *mvm,
833 struct iwl_mvm_sta *mvm_sta, u8 tid,
834 struct sk_buff *skb)
835{
836 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
837 u8 mac_queue = info->hw_queue;
838 struct sk_buff_head *deferred_tx_frames;
839
840 lockdep_assert_held(&mvm_sta->lock);
841
842 mvm_sta->deferred_traffic_tid_map |= BIT(tid);
843 set_bit(mvm_sta->sta_id, mvm->sta_deferred_frames);
844
845 deferred_tx_frames = &mvm_sta->tid_data[tid].deferred_tx_frames;
846
847 skb_queue_tail(deferred_tx_frames, skb);
848
849 /*
850 * The first deferred frame should've stopped the MAC queues, so we
851 * should never get a second deferred frame for the RA/TID.
852 */
853 if (!WARN(skb_queue_len(deferred_tx_frames) != 1,
854 "RATID %d/%d has %d deferred frames\n", mvm_sta->sta_id, tid,
855 skb_queue_len(deferred_tx_frames))) {
856 iwl_mvm_stop_mac_queues(mvm, BIT(mac_queue));
857 schedule_work(&mvm->add_stream_wk);
858 }
859}
860
861/* Check if there are any timed-out TIDs on a given shared TXQ */
862static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id)
863{
864 unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap;
865 unsigned long now = jiffies;
866 int tid;
867
868 for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) {
869 if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] +
870 IWL_MVM_DQA_QUEUE_TIMEOUT, now))
871 return true;
872 }
873
874 return false;
875}
876
877/*
878 * Sets the fields in the Tx cmd that are crypto related
879 */
880static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb,
881 struct ieee80211_tx_info *info,
882 struct ieee80211_sta *sta)
883{
884 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
885 struct iwl_mvm_sta *mvmsta;
886 struct iwl_device_cmd *dev_cmd;
887 struct iwl_tx_cmd *tx_cmd;
888 __le16 fc;
889 u16 seq_number = 0;
890 u8 tid = IWL_MAX_TID_COUNT;
891 u8 txq_id = info->hw_queue;
892 bool is_ampdu = false;
893 int hdrlen;
894
895 mvmsta = iwl_mvm_sta_from_mac80211(sta);
896 fc = hdr->frame_control;
897 hdrlen = ieee80211_hdrlen(fc);
898
899 if (WARN_ON_ONCE(!mvmsta))
900 return -1;
901
902 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
903 return -1;
904
905 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen,
906 sta, mvmsta->sta_id);
907 if (!dev_cmd)
908 goto drop;
909
910 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
911 /* From now on, we cannot access info->control */
912
913 /*
914 * we handle that entirely ourselves -- for uAPSD the firmware
915 * will always send a notification, and for PS-Poll responses
916 * we'll notify mac80211 when getting frame status
917 */
918 info->flags &= ~IEEE80211_TX_STATUS_EOSP;
919
920 spin_lock(&mvmsta->lock);
921
922 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
923 u8 *qc = NULL;
924 qc = ieee80211_get_qos_ctl(hdr);
925 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
926 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
927 goto drop_unlock_sta;
928
929 seq_number = mvmsta->tid_data[tid].seq_number;
930 seq_number &= IEEE80211_SCTL_SEQ;
931 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
932 hdr->seq_ctrl |= cpu_to_le16(seq_number);
933 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU;
934 } else if (iwl_mvm_is_dqa_supported(mvm) &&
935 (ieee80211_is_qos_nullfunc(fc) ||
936 ieee80211_is_nullfunc(fc))) {
937 /*
938 * nullfunc frames should go to the MGMT queue regardless of QOS
939 */
940 tid = IWL_MAX_TID_COUNT;
941 }
942
943 if (iwl_mvm_is_dqa_supported(mvm)) {
944 txq_id = mvmsta->tid_data[tid].txq_id;
945
946 if (ieee80211_is_mgmt(fc))
947 tx_cmd->tid_tspec = IWL_TID_NON_QOS;
948 }
949
950 /* Copy MAC header from skb into command buffer */
951 memcpy(tx_cmd->hdr, hdr, hdrlen);
952
953 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
954
955 if (sta->tdls && !iwl_mvm_is_dqa_supported(mvm)) {
956 /* default to TID 0 for non-QoS packets */
957 u8 tdls_tid = tid == IWL_MAX_TID_COUNT ? 0 : tid;
958
959 txq_id = mvmsta->hw_queue[tid_to_mac80211_ac[tdls_tid]];
960 }
961
962 if (is_ampdu) {
963 if (WARN_ON_ONCE(mvmsta->tid_data[tid].state != IWL_AGG_ON))
964 goto drop_unlock_sta;
965 txq_id = mvmsta->tid_data[tid].txq_id;
966 }
967
968 /* Check if TXQ needs to be allocated or re-activated */
969 if (unlikely(txq_id == IEEE80211_INVAL_HW_QUEUE ||
970 !mvmsta->tid_data[tid].is_tid_active) &&
971 iwl_mvm_is_dqa_supported(mvm)) {
972 /* If TXQ needs to be allocated... */
973 if (txq_id == IEEE80211_INVAL_HW_QUEUE) {
974 iwl_mvm_tx_add_stream(mvm, mvmsta, tid, skb);
975
976 /*
977 * The frame is now deferred, and the worker scheduled
978 * will re-allocate it, so we can free it for now.
979 */
980 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
981 spin_unlock(&mvmsta->lock);
982 return 0;
983 }
984
985 /* If we are here - TXQ exists and needs to be re-activated */
986 spin_lock(&mvm->queue_info_lock);
987 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY;
988 mvmsta->tid_data[tid].is_tid_active = true;
989 spin_unlock(&mvm->queue_info_lock);
990
991 IWL_DEBUG_TX_QUEUES(mvm, "Re-activating queue %d for TX\n",
992 txq_id);
993 }
994
995 if (iwl_mvm_is_dqa_supported(mvm)) {
996 /* Keep track of the time of the last frame for this RA/TID */
997 mvm->queue_info[txq_id].last_frame_time[tid] = jiffies;
998
999 /*
1000 * If we have timed-out TIDs - schedule the worker that will
1001 * reconfig the queues and update them
1002 *
1003 * Note that the mvm->queue_info_lock isn't being taken here in
1004 * order to not serialize the TX flow. This isn't dangerous
1005 * because scheduling mvm->add_stream_wk can't ruin the state,
1006 * and if we DON'T schedule it due to some race condition then
1007 * next TX we get here we will.
1008 */
1009 if (unlikely(mvm->queue_info[txq_id].status ==
1010 IWL_MVM_QUEUE_SHARED &&
1011 iwl_mvm_txq_should_update(mvm, txq_id)))
1012 schedule_work(&mvm->add_stream_wk);
1013 }
1014
1015 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id,
1016 tid, txq_id, IEEE80211_SEQ_TO_SN(seq_number));
1017
1018 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id))
1019 goto drop_unlock_sta;
1020
1021 if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc))
1022 mvmsta->tid_data[tid].seq_number = seq_number + 0x10;
1023
1024 spin_unlock(&mvmsta->lock);
1025
1026 /* Increase pending frames count if this isn't AMPDU */
1027 if (!is_ampdu)
1028 atomic_inc(&mvm->pending_frames[mvmsta->sta_id]);
1029
1030 return 0;
1031
1032drop_unlock_sta:
1033 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1034 spin_unlock(&mvmsta->lock);
1035drop:
1036 return -1;
1037}
1038
1039int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb,
1040 struct ieee80211_sta *sta)
1041{
1042 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1043 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb);
1044 struct ieee80211_tx_info info;
1045 struct sk_buff_head mpdus_skbs;
1046 unsigned int payload_len;
1047 int ret;
1048
1049 if (WARN_ON_ONCE(!mvmsta))
1050 return -1;
1051
1052 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
1053 return -1;
1054
1055 memcpy(&info, skb->cb, sizeof(info));
1056
1057 /* This holds the amsdu headers length */
1058 skb_info->driver_data[0] = (void *)(uintptr_t)0;
1059
1060 if (!skb_is_gso(skb))
1061 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1062
1063 payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
1064 tcp_hdrlen(skb) + skb->data_len;
1065
1066 if (payload_len <= skb_shinfo(skb)->gso_size)
1067 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1068
1069 __skb_queue_head_init(&mpdus_skbs);
1070
1071 ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs);
1072 if (ret)
1073 return ret;
1074
1075 if (WARN_ON(skb_queue_empty(&mpdus_skbs)))
1076 return ret;
1077
1078 while (!skb_queue_empty(&mpdus_skbs)) {
1079 skb = __skb_dequeue(&mpdus_skbs);
1080
1081 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1082 if (ret) {
1083 __skb_queue_purge(&mpdus_skbs);
1084 return ret;
1085 }
1086 }
1087
1088 return 0;
1089}
1090
1091static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm,
1092 struct ieee80211_sta *sta, u8 tid)
1093{
1094 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1095 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1096 struct ieee80211_vif *vif = mvmsta->vif;
1097
1098 lockdep_assert_held(&mvmsta->lock);
1099
1100 if ((tid_data->state == IWL_AGG_ON ||
1101 tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) &&
1102 iwl_mvm_tid_queued(tid_data) == 0) {
1103 /*
1104 * Now that this aggregation queue is empty tell mac80211 so it
1105 * knows we no longer have frames buffered for the station on
1106 * this TID (for the TIM bitmap calculation.)
1107 */
1108 ieee80211_sta_set_buffered(sta, tid, false);
1109 }
1110
1111 if (tid_data->ssn != tid_data->next_reclaimed)
1112 return;
1113
1114 switch (tid_data->state) {
1115 case IWL_EMPTYING_HW_QUEUE_ADDBA:
1116 IWL_DEBUG_TX_QUEUES(mvm,
1117 "Can continue addBA flow ssn = next_recl = %d\n",
1118 tid_data->next_reclaimed);
1119 tid_data->state = IWL_AGG_STARTING;
1120 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1121 break;
1122
1123 case IWL_EMPTYING_HW_QUEUE_DELBA:
1124 IWL_DEBUG_TX_QUEUES(mvm,
1125 "Can continue DELBA flow ssn = next_recl = %d\n",
1126 tid_data->next_reclaimed);
1127 if (!iwl_mvm_is_dqa_supported(mvm)) {
1128 u8 mac80211_ac = tid_to_mac80211_ac[tid];
1129
1130 iwl_mvm_disable_txq(mvm, tid_data->txq_id,
1131 vif->hw_queue[mac80211_ac], tid,
1132 CMD_ASYNC);
1133 }
1134 tid_data->state = IWL_AGG_OFF;
1135 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1136 break;
1137
1138 default:
1139 break;
1140 }
1141}
1142
1143#ifdef CONFIG_IWLWIFI_DEBUG
1144const char *iwl_mvm_get_tx_fail_reason(u32 status)
1145{
1146#define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
1147#define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
1148
1149 switch (status & TX_STATUS_MSK) {
1150 case TX_STATUS_SUCCESS:
1151 return "SUCCESS";
1152 TX_STATUS_POSTPONE(DELAY);
1153 TX_STATUS_POSTPONE(FEW_BYTES);
1154 TX_STATUS_POSTPONE(BT_PRIO);
1155 TX_STATUS_POSTPONE(QUIET_PERIOD);
1156 TX_STATUS_POSTPONE(CALC_TTAK);
1157 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
1158 TX_STATUS_FAIL(SHORT_LIMIT);
1159 TX_STATUS_FAIL(LONG_LIMIT);
1160 TX_STATUS_FAIL(UNDERRUN);
1161 TX_STATUS_FAIL(DRAIN_FLOW);
1162 TX_STATUS_FAIL(RFKILL_FLUSH);
1163 TX_STATUS_FAIL(LIFE_EXPIRE);
1164 TX_STATUS_FAIL(DEST_PS);
1165 TX_STATUS_FAIL(HOST_ABORTED);
1166 TX_STATUS_FAIL(BT_RETRY);
1167 TX_STATUS_FAIL(STA_INVALID);
1168 TX_STATUS_FAIL(FRAG_DROPPED);
1169 TX_STATUS_FAIL(TID_DISABLE);
1170 TX_STATUS_FAIL(FIFO_FLUSHED);
1171 TX_STATUS_FAIL(SMALL_CF_POLL);
1172 TX_STATUS_FAIL(FW_DROP);
1173 TX_STATUS_FAIL(STA_COLOR_MISMATCH);
1174 }
1175
1176 return "UNKNOWN";
1177
1178#undef TX_STATUS_FAIL
1179#undef TX_STATUS_POSTPONE
1180}
1181#endif /* CONFIG_IWLWIFI_DEBUG */
1182
1183void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags,
1184 enum nl80211_band band,
1185 struct ieee80211_tx_rate *r)
1186{
1187 if (rate_n_flags & RATE_HT_MCS_GF_MSK)
1188 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
1189 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
1190 case RATE_MCS_CHAN_WIDTH_20:
1191 break;
1192 case RATE_MCS_CHAN_WIDTH_40:
1193 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
1194 break;
1195 case RATE_MCS_CHAN_WIDTH_80:
1196 r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH;
1197 break;
1198 case RATE_MCS_CHAN_WIDTH_160:
1199 r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH;
1200 break;
1201 }
1202 if (rate_n_flags & RATE_MCS_SGI_MSK)
1203 r->flags |= IEEE80211_TX_RC_SHORT_GI;
1204 if (rate_n_flags & RATE_MCS_HT_MSK) {
1205 r->flags |= IEEE80211_TX_RC_MCS;
1206 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
1207 } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
1208 ieee80211_rate_set_vht(
1209 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK,
1210 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
1211 RATE_VHT_MCS_NSS_POS) + 1);
1212 r->flags |= IEEE80211_TX_RC_VHT_MCS;
1213 } else {
1214 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
1215 band);
1216 }
1217}
1218
1219/**
1220 * translate ucode response to mac80211 tx status control values
1221 */
1222static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags,
1223 struct ieee80211_tx_info *info)
1224{
1225 struct ieee80211_tx_rate *r = &info->status.rates[0];
1226
1227 info->status.antenna =
1228 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
1229 iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r);
1230}
1231
1232static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm,
1233 u32 status)
1234{
1235 struct iwl_fw_dbg_trigger_tlv *trig;
1236 struct iwl_fw_dbg_trigger_tx_status *status_trig;
1237 int i;
1238
1239 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TX_STATUS))
1240 return;
1241
1242 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TX_STATUS);
1243 status_trig = (void *)trig->data;
1244
1245 if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig))
1246 return;
1247
1248 for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) {
1249 /* don't collect on status 0 */
1250 if (!status_trig->statuses[i].status)
1251 break;
1252
1253 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK))
1254 continue;
1255
1256 iwl_mvm_fw_dbg_collect_trig(mvm, trig,
1257 "Tx status %d was received",
1258 status & TX_STATUS_MSK);
1259 break;
1260 }
1261}
1262
1263static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm,
1264 struct iwl_rx_packet *pkt)
1265{
1266 struct ieee80211_sta *sta;
1267 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1268 int txq_id = SEQ_TO_QUEUE(sequence);
1269 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1270 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1271 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1272 u32 status = le16_to_cpu(tx_resp->status.status);
1273 u16 ssn = iwl_mvm_get_scd_ssn(tx_resp);
1274 struct iwl_mvm_sta *mvmsta;
1275 struct sk_buff_head skbs;
1276 u8 skb_freed = 0;
1277 u16 next_reclaimed, seq_ctl;
1278 bool is_ndp = false;
1279 bool txq_agg = false; /* Is this TXQ aggregated */
1280
1281 __skb_queue_head_init(&skbs);
1282
1283 seq_ctl = le16_to_cpu(tx_resp->seq_ctl);
1284
1285 /* we can free until ssn % q.n_bd not inclusive */
1286 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs);
1287
1288 while (!skb_queue_empty(&skbs)) {
1289 struct sk_buff *skb = __skb_dequeue(&skbs);
1290 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1291
1292 skb_freed++;
1293
1294 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1295
1296 memset(&info->status, 0, sizeof(info->status));
1297
1298 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1299
1300 /* inform mac80211 about what happened with the frame */
1301 switch (status & TX_STATUS_MSK) {
1302 case TX_STATUS_SUCCESS:
1303 case TX_STATUS_DIRECT_DONE:
1304 info->flags |= IEEE80211_TX_STAT_ACK;
1305 break;
1306 case TX_STATUS_FAIL_DEST_PS:
1307 info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
1308 break;
1309 default:
1310 break;
1311 }
1312
1313 iwl_mvm_tx_status_check_trigger(mvm, status);
1314
1315 info->status.rates[0].count = tx_resp->failure_frame + 1;
1316 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate),
1317 info);
1318 info->status.status_driver_data[1] =
1319 (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate);
1320
1321 /* Single frame failure in an AMPDU queue => send BAR */
1322 if (txq_id >= mvm->first_agg_queue &&
1323 !(info->flags & IEEE80211_TX_STAT_ACK) &&
1324 !(info->flags & IEEE80211_TX_STAT_TX_FILTERED))
1325 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1326
1327 /* W/A FW bug: seq_ctl is wrong when the status isn't success */
1328 if (status != TX_STATUS_SUCCESS) {
1329 struct ieee80211_hdr *hdr = (void *)skb->data;
1330 seq_ctl = le16_to_cpu(hdr->seq_ctrl);
1331 }
1332
1333 if (unlikely(!seq_ctl)) {
1334 struct ieee80211_hdr *hdr = (void *)skb->data;
1335
1336 /*
1337 * If it is an NDP, we can't update next_reclaim since
1338 * its sequence control is 0. Note that for that same
1339 * reason, NDPs are never sent to A-MPDU'able queues
1340 * so that we can never have more than one freed frame
1341 * for a single Tx resonse (see WARN_ON below).
1342 */
1343 if (ieee80211_is_qos_nullfunc(hdr->frame_control))
1344 is_ndp = true;
1345 }
1346
1347 /*
1348 * TODO: this is not accurate if we are freeing more than one
1349 * packet.
1350 */
1351 info->status.tx_time =
1352 le16_to_cpu(tx_resp->wireless_media_time);
1353 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1);
1354 info->status.status_driver_data[0] =
1355 (void *)(uintptr_t)tx_resp->reduced_tpc;
1356
1357 ieee80211_tx_status(mvm->hw, skb);
1358 }
1359
1360 if (txq_id >= mvm->first_agg_queue) {
1361 /* If this is an aggregation queue, we use the ssn since:
1362 * ssn = wifi seq_num % 256.
1363 * The seq_ctl is the sequence control of the packet to which
1364 * this Tx response relates. But if there is a hole in the
1365 * bitmap of the BA we received, this Tx response may allow to
1366 * reclaim the hole and all the subsequent packets that were
1367 * already acked. In that case, seq_ctl != ssn, and the next
1368 * packet to be reclaimed will be ssn and not seq_ctl. In that
1369 * case, several packets will be reclaimed even if
1370 * frame_count = 1.
1371 *
1372 * The ssn is the index (% 256) of the latest packet that has
1373 * treated (acked / dropped) + 1.
1374 */
1375 next_reclaimed = ssn;
1376 } else {
1377 /* The next packet to be reclaimed is the one after this one */
1378 next_reclaimed = IEEE80211_SEQ_TO_SN(seq_ctl + 0x10);
1379 }
1380
1381 IWL_DEBUG_TX_REPLY(mvm,
1382 "TXQ %d status %s (0x%08x)\n",
1383 txq_id, iwl_mvm_get_tx_fail_reason(status), status);
1384
1385 IWL_DEBUG_TX_REPLY(mvm,
1386 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
1387 le32_to_cpu(tx_resp->initial_rate),
1388 tx_resp->failure_frame, SEQ_TO_INDEX(sequence),
1389 ssn, next_reclaimed, seq_ctl);
1390
1391 rcu_read_lock();
1392
1393 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1394 /*
1395 * sta can't be NULL otherwise it'd mean that the sta has been freed in
1396 * the firmware while we still have packets for it in the Tx queues.
1397 */
1398 if (WARN_ON_ONCE(!sta))
1399 goto out;
1400
1401 if (!IS_ERR(sta)) {
1402 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1403
1404 if (tid != IWL_TID_NON_QOS) {
1405 struct iwl_mvm_tid_data *tid_data =
1406 &mvmsta->tid_data[tid];
1407 bool send_eosp_ndp = false;
1408
1409 spin_lock_bh(&mvmsta->lock);
1410 if (iwl_mvm_is_dqa_supported(mvm)) {
1411 enum iwl_mvm_agg_state state;
1412
1413 state = mvmsta->tid_data[tid].state;
1414 txq_agg = (state == IWL_AGG_ON ||
1415 state == IWL_EMPTYING_HW_QUEUE_DELBA);
1416 } else {
1417 txq_agg = txq_id >= mvm->first_agg_queue;
1418 }
1419
1420 if (!is_ndp) {
1421 tid_data->next_reclaimed = next_reclaimed;
1422 IWL_DEBUG_TX_REPLY(mvm,
1423 "Next reclaimed packet:%d\n",
1424 next_reclaimed);
1425 } else {
1426 IWL_DEBUG_TX_REPLY(mvm,
1427 "NDP - don't update next_reclaimed\n");
1428 }
1429
1430 iwl_mvm_check_ratid_empty(mvm, sta, tid);
1431
1432 if (mvmsta->sleep_tx_count) {
1433 mvmsta->sleep_tx_count--;
1434 if (mvmsta->sleep_tx_count &&
1435 !iwl_mvm_tid_queued(tid_data)) {
1436 /*
1437 * The number of frames in the queue
1438 * dropped to 0 even if we sent less
1439 * frames than we thought we had on the
1440 * Tx queue.
1441 * This means we had holes in the BA
1442 * window that we just filled, ask
1443 * mac80211 to send EOSP since the
1444 * firmware won't know how to do that.
1445 * Send NDP and the firmware will send
1446 * EOSP notification that will trigger
1447 * a call to ieee80211_sta_eosp().
1448 */
1449 send_eosp_ndp = true;
1450 }
1451 }
1452
1453 spin_unlock_bh(&mvmsta->lock);
1454 if (send_eosp_ndp) {
1455 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta,
1456 IEEE80211_FRAME_RELEASE_UAPSD,
1457 1, tid, false, false);
1458 mvmsta->sleep_tx_count = 0;
1459 ieee80211_send_eosp_nullfunc(sta, tid);
1460 }
1461 }
1462
1463 if (mvmsta->next_status_eosp) {
1464 mvmsta->next_status_eosp = false;
1465 ieee80211_sta_eosp(sta);
1466 }
1467 } else {
1468 mvmsta = NULL;
1469 }
1470
1471 /*
1472 * If the txq is not an AMPDU queue, there is no chance we freed
1473 * several skbs. Check that out...
1474 */
1475 if (txq_agg)
1476 goto out;
1477
1478 /* We can't free more than one frame at once on a shared queue */
1479 WARN_ON(!iwl_mvm_is_dqa_supported(mvm) && (skb_freed > 1));
1480
1481 /* If we have still frames for this STA nothing to do here */
1482 if (!atomic_sub_and_test(skb_freed, &mvm->pending_frames[sta_id]))
1483 goto out;
1484
1485 if (mvmsta && mvmsta->vif->type == NL80211_IFTYPE_AP) {
1486
1487 /*
1488 * If there are no pending frames for this STA and
1489 * the tx to this station is not disabled, notify
1490 * mac80211 that this station can now wake up in its
1491 * STA table.
1492 * If mvmsta is not NULL, sta is valid.
1493 */
1494
1495 spin_lock_bh(&mvmsta->lock);
1496
1497 if (!mvmsta->disable_tx)
1498 ieee80211_sta_block_awake(mvm->hw, sta, false);
1499
1500 spin_unlock_bh(&mvmsta->lock);
1501 }
1502
1503 if (PTR_ERR(sta) == -EBUSY || PTR_ERR(sta) == -ENOENT) {
1504 /*
1505 * We are draining and this was the last packet - pre_rcu_remove
1506 * has been called already. We might be after the
1507 * synchronize_net already.
1508 * Don't rely on iwl_mvm_rm_sta to see the empty Tx queues.
1509 */
1510 set_bit(sta_id, mvm->sta_drained);
1511 schedule_work(&mvm->sta_drained_wk);
1512 }
1513
1514out:
1515 rcu_read_unlock();
1516}
1517
1518#ifdef CONFIG_IWLWIFI_DEBUG
1519#define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
1520static const char *iwl_get_agg_tx_status(u16 status)
1521{
1522 switch (status & AGG_TX_STATE_STATUS_MSK) {
1523 AGG_TX_STATE_(TRANSMITTED);
1524 AGG_TX_STATE_(UNDERRUN);
1525 AGG_TX_STATE_(BT_PRIO);
1526 AGG_TX_STATE_(FEW_BYTES);
1527 AGG_TX_STATE_(ABORT);
1528 AGG_TX_STATE_(LAST_SENT_TTL);
1529 AGG_TX_STATE_(LAST_SENT_TRY_CNT);
1530 AGG_TX_STATE_(LAST_SENT_BT_KILL);
1531 AGG_TX_STATE_(SCD_QUERY);
1532 AGG_TX_STATE_(TEST_BAD_CRC32);
1533 AGG_TX_STATE_(RESPONSE);
1534 AGG_TX_STATE_(DUMP_TX);
1535 AGG_TX_STATE_(DELAY_TX);
1536 }
1537
1538 return "UNKNOWN";
1539}
1540
1541static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1542 struct iwl_rx_packet *pkt)
1543{
1544 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1545 struct agg_tx_status *frame_status = &tx_resp->status;
1546 int i;
1547
1548 for (i = 0; i < tx_resp->frame_count; i++) {
1549 u16 fstatus = le16_to_cpu(frame_status[i].status);
1550
1551 IWL_DEBUG_TX_REPLY(mvm,
1552 "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
1553 iwl_get_agg_tx_status(fstatus),
1554 fstatus & AGG_TX_STATE_STATUS_MSK,
1555 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >>
1556 AGG_TX_STATE_TRY_CNT_POS,
1557 le16_to_cpu(frame_status[i].sequence));
1558 }
1559}
1560#else
1561static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1562 struct iwl_rx_packet *pkt)
1563{}
1564#endif /* CONFIG_IWLWIFI_DEBUG */
1565
1566static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm,
1567 struct iwl_rx_packet *pkt)
1568{
1569 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1570 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1571 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1572 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1573 struct iwl_mvm_sta *mvmsta;
1574 int queue = SEQ_TO_QUEUE(sequence);
1575
1576 if (WARN_ON_ONCE(queue < mvm->first_agg_queue &&
1577 (!iwl_mvm_is_dqa_supported(mvm) ||
1578 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE))))
1579 return;
1580
1581 if (WARN_ON_ONCE(tid == IWL_TID_NON_QOS))
1582 return;
1583
1584 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt);
1585
1586 rcu_read_lock();
1587
1588 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1589
1590 if (!WARN_ON_ONCE(!mvmsta)) {
1591 mvmsta->tid_data[tid].rate_n_flags =
1592 le32_to_cpu(tx_resp->initial_rate);
1593 mvmsta->tid_data[tid].tx_time =
1594 le16_to_cpu(tx_resp->wireless_media_time);
1595 }
1596
1597 rcu_read_unlock();
1598}
1599
1600void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1601{
1602 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1603 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1604
1605 if (tx_resp->frame_count == 1)
1606 iwl_mvm_rx_tx_cmd_single(mvm, pkt);
1607 else
1608 iwl_mvm_rx_tx_cmd_agg(mvm, pkt);
1609}
1610
1611static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid,
1612 int txq, int index,
1613 struct ieee80211_tx_info *ba_info, u32 rate)
1614{
1615 struct sk_buff_head reclaimed_skbs;
1616 struct iwl_mvm_tid_data *tid_data;
1617 struct ieee80211_sta *sta;
1618 struct iwl_mvm_sta *mvmsta;
1619 struct sk_buff *skb;
1620 int freed;
1621
1622 if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT ||
1623 tid >= IWL_MAX_TID_COUNT,
1624 "sta_id %d tid %d", sta_id, tid))
1625 return;
1626
1627 rcu_read_lock();
1628
1629 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1630
1631 /* Reclaiming frames for a station that has been deleted ? */
1632 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
1633 rcu_read_unlock();
1634 return;
1635 }
1636
1637 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1638 tid_data = &mvmsta->tid_data[tid];
1639
1640 if (tid_data->txq_id != txq) {
1641 IWL_ERR(mvm,
1642 "invalid BA notification: Q %d, tid %d\n",
1643 tid_data->txq_id, tid);
1644 rcu_read_unlock();
1645 return;
1646 }
1647
1648 spin_lock_bh(&mvmsta->lock);
1649
1650 __skb_queue_head_init(&reclaimed_skbs);
1651
1652 /*
1653 * Release all TFDs before the SSN, i.e. all TFDs in front of
1654 * block-ack window (we assume that they've been successfully
1655 * transmitted ... if not, it's too late anyway).
1656 */
1657 iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs);
1658
1659 tid_data->next_reclaimed = index;
1660
1661 iwl_mvm_check_ratid_empty(mvm, sta, tid);
1662
1663 freed = 0;
1664 ba_info->status.status_driver_data[1] = (void *)(uintptr_t)rate;
1665
1666 skb_queue_walk(&reclaimed_skbs, skb) {
1667 struct ieee80211_hdr *hdr = (void *)skb->data;
1668 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1669
1670 if (ieee80211_is_data_qos(hdr->frame_control))
1671 freed++;
1672 else
1673 WARN_ON_ONCE(1);
1674
1675 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1676
1677 memset(&info->status, 0, sizeof(info->status));
1678 /* Packet was transmitted successfully, failures come as single
1679 * frames because before failing a frame the firmware transmits
1680 * it without aggregation at least once.
1681 */
1682 info->flags |= IEEE80211_TX_STAT_ACK;
1683
1684 /* this is the first skb we deliver in this batch */
1685 /* put the rate scaling data there */
1686 if (freed == 1) {
1687 info->flags |= IEEE80211_TX_STAT_AMPDU;
1688 memcpy(&info->status, &ba_info->status,
1689 sizeof(ba_info->status));
1690 iwl_mvm_hwrate_to_tx_status(rate, info);
1691 }
1692 }
1693
1694 spin_unlock_bh(&mvmsta->lock);
1695
1696 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is
1697 * possible (i.e. first MPDU in the aggregation wasn't acked)
1698 * Still it's important to update RS about sent vs. acked.
1699 */
1700 if (skb_queue_empty(&reclaimed_skbs)) {
1701 struct ieee80211_chanctx_conf *chanctx_conf = NULL;
1702
1703 if (mvmsta->vif)
1704 chanctx_conf =
1705 rcu_dereference(mvmsta->vif->chanctx_conf);
1706
1707 if (WARN_ON_ONCE(!chanctx_conf))
1708 goto out;
1709
1710 ba_info->band = chanctx_conf->def.chan->band;
1711 iwl_mvm_hwrate_to_tx_status(rate, ba_info);
1712
1713 IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n");
1714 iwl_mvm_rs_tx_status(mvm, sta, tid, ba_info, false);
1715 }
1716
1717out:
1718 rcu_read_unlock();
1719
1720 while (!skb_queue_empty(&reclaimed_skbs)) {
1721 skb = __skb_dequeue(&reclaimed_skbs);
1722 ieee80211_tx_status(mvm->hw, skb);
1723 }
1724}
1725
1726void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1727{
1728 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1729 int sta_id, tid, txq, index;
1730 struct ieee80211_tx_info ba_info = {};
1731 struct iwl_mvm_ba_notif *ba_notif;
1732 struct iwl_mvm_tid_data *tid_data;
1733 struct iwl_mvm_sta *mvmsta;
1734
1735 if (iwl_mvm_has_new_tx_api(mvm)) {
1736 struct iwl_mvm_compressed_ba_notif *ba_res =
1737 (void *)pkt->data;
1738
1739 sta_id = ba_res->sta_id;
1740 ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done);
1741 ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed);
1742 ba_info.status.tx_time =
1743 (u16)le32_to_cpu(ba_res->wireless_time);
1744 ba_info.status.status_driver_data[0] =
1745 (void *)(uintptr_t)ba_res->reduced_txp;
1746
1747 /*
1748 * TODO:
1749 * When supporting multi TID aggregations - we need to move
1750 * next_reclaimed to be per TXQ and not per TID or handle it
1751 * in a different way.
1752 * This will go together with SN and AddBA offload and cannot
1753 * be handled properly for now.
1754 */
1755 WARN_ON(le16_to_cpu(ba_res->tfd_cnt) != 1);
1756 iwl_mvm_tx_reclaim(mvm, sta_id, ba_res->ra_tid[0].tid,
1757 (int)ba_res->tfd[0].q_num,
1758 le16_to_cpu(ba_res->tfd[0].tfd_index),
1759 &ba_info, le32_to_cpu(ba_res->tx_rate));
1760
1761 IWL_DEBUG_TX_REPLY(mvm,
1762 "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n",
1763 sta_id, le32_to_cpu(ba_res->flags),
1764 le16_to_cpu(ba_res->txed),
1765 le16_to_cpu(ba_res->done));
1766 return;
1767 }
1768
1769 ba_notif = (void *)pkt->data;
1770 sta_id = ba_notif->sta_id;
1771 tid = ba_notif->tid;
1772 /* "flow" corresponds to Tx queue */
1773 txq = le16_to_cpu(ba_notif->scd_flow);
1774 /* "ssn" is start of block-ack Tx window, corresponds to index
1775 * (in Tx queue's circular buffer) of first TFD/frame in window */
1776 index = le16_to_cpu(ba_notif->scd_ssn);
1777
1778 rcu_read_lock();
1779 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1780 if (WARN_ON_ONCE(!mvmsta)) {
1781 rcu_read_unlock();
1782 return;
1783 }
1784
1785 tid_data = &mvmsta->tid_data[tid];
1786
1787 ba_info.status.ampdu_ack_len = ba_notif->txed_2_done;
1788 ba_info.status.ampdu_len = ba_notif->txed;
1789 ba_info.status.tx_time = tid_data->tx_time;
1790 ba_info.status.status_driver_data[0] =
1791 (void *)(uintptr_t)ba_notif->reduced_txp;
1792
1793 rcu_read_unlock();
1794
1795 iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info,
1796 tid_data->rate_n_flags);
1797
1798 IWL_DEBUG_TX_REPLY(mvm,
1799 "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
1800 (u8 *)&ba_notif->sta_addr_lo32, ba_notif->sta_id);
1801
1802 IWL_DEBUG_TX_REPLY(mvm,
1803 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
1804 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl),
1805 le64_to_cpu(ba_notif->bitmap), txq, index,
1806 ba_notif->txed, ba_notif->txed_2_done);
1807
1808 IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n",
1809 ba_notif->reduced_txp);
1810}
1811
1812/*
1813 * Note that there are transports that buffer frames before they reach
1814 * the firmware. This means that after flush_tx_path is called, the
1815 * queue might not be empty. The race-free way to handle this is to:
1816 * 1) set the station as draining
1817 * 2) flush the Tx path
1818 * 3) wait for the transport queues to be empty
1819 */
1820int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, u32 flags)
1821{
1822 int ret;
1823 struct iwl_tx_path_flush_cmd flush_cmd = {
1824 .queues_ctl = cpu_to_le32(tfd_msk),
1825 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH),
1826 };
1827
1828 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags,
1829 sizeof(flush_cmd), &flush_cmd);
1830 if (ret)
1831 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
1832 return ret;
1833}