1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2 /*
3 * Copyright (C) 2012-2014, 2018-2024 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-nvm-utils.h"
16 #include "mvm.h"
17 #include "sta.h"
18 #include "time-sync.h"
19
20 static void
iwl_mvm_bar_check_trigger(struct iwl_mvm * mvm,const u8 * addr,u16 tid,u16 ssn)21 iwl_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
iwl_mvm_tx_csum(struct iwl_mvm * mvm,struct sk_buff * skb,struct ieee80211_tx_info * info,bool amsdu)44 static 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
123 out:
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 */
iwl_mvm_set_tx_cmd(struct iwl_mvm * mvm,struct sk_buff * skb,struct iwl_tx_cmd * tx_cmd,struct ieee80211_tx_info * info,u8 sta_id)149 void 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
iwl_mvm_get_tx_ant(struct iwl_mvm * mvm,struct ieee80211_tx_info * info,struct ieee80211_sta * sta,__le16 fc)248 static 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
iwl_mvm_convert_rate_idx(struct iwl_mvm * mvm,struct ieee80211_tx_info * info,int rate_idx)265 static 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
iwl_mvm_get_inject_tx_rate(struct iwl_mvm * mvm,struct ieee80211_tx_info * info,struct ieee80211_sta * sta,__le16 fc)297 static 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
iwl_mvm_get_tx_rate(struct iwl_mvm * mvm,struct ieee80211_tx_info * info,struct ieee80211_sta * sta,__le16 fc)359 static 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
iwl_mvm_get_tx_rate_n_flags(struct iwl_mvm * mvm,struct ieee80211_tx_info * info,struct ieee80211_sta * sta,__le16 fc)393 static 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 */
iwl_mvm_set_tx_cmd_rate(struct iwl_mvm * mvm,struct iwl_tx_cmd * tx_cmd,struct ieee80211_tx_info * info,struct ieee80211_sta * sta,__le16 fc)407 void 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
iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info * info,u8 * crypto_hdr)449 static 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 */
iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm * mvm,struct ieee80211_tx_info * info,struct iwl_tx_cmd * tx_cmd,struct sk_buff * skb_frag,int hdrlen)469 static 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
iwl_mvm_use_host_rate(struct iwl_mvm * mvm,struct iwl_mvm_sta * mvmsta,struct ieee80211_hdr * hdr,struct ieee80211_tx_info * info)523 static bool iwl_mvm_use_host_rate(struct iwl_mvm *mvm,
524 struct iwl_mvm_sta *mvmsta,
525 struct ieee80211_hdr *hdr,
526 struct ieee80211_tx_info *info)
527 {
528 if (unlikely(!mvmsta))
529 return true;
530
531 if (unlikely(info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT))
532 return true;
533
534 if (likely(ieee80211_is_data(hdr->frame_control) &&
535 mvmsta->sta_state >= IEEE80211_STA_AUTHORIZED))
536 return false;
537
538 /*
539 * Not a data frame, use host rate if on an old device that
540 * can't possibly be doing MLO (firmware may be selecting a
541 * bad rate), if we might be doing MLO we need to let FW pick
542 * (since we don't necesarily know the link), but FW rate
543 * selection was fixed.
544 */
545 return mvm->trans->trans_cfg->device_family < IWL_DEVICE_FAMILY_BZ;
546 }
547
iwl_mvm_copy_hdr(void * cmd,const void * hdr,int hdrlen,const u8 * addr3_override)548 static void iwl_mvm_copy_hdr(void *cmd, const void *hdr, int hdrlen,
549 const u8 *addr3_override)
550 {
551 struct ieee80211_hdr *out_hdr = cmd;
552
553 memcpy(cmd, hdr, hdrlen);
554 if (addr3_override)
555 memcpy(out_hdr->addr3, addr3_override, ETH_ALEN);
556 }
557
558 /*
559 * Allocates and sets the Tx cmd the driver data pointers in the skb
560 */
561 static struct iwl_device_tx_cmd *
iwl_mvm_set_tx_params(struct iwl_mvm * mvm,struct sk_buff * skb,struct ieee80211_tx_info * info,int hdrlen,struct ieee80211_sta * sta,u8 sta_id,const u8 * addr3_override)562 iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb,
563 struct ieee80211_tx_info *info, int hdrlen,
564 struct ieee80211_sta *sta, u8 sta_id,
565 const u8 *addr3_override)
566 {
567 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
568 struct iwl_device_tx_cmd *dev_cmd;
569 struct iwl_tx_cmd *tx_cmd;
570
571 dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans);
572
573 if (unlikely(!dev_cmd))
574 return NULL;
575
576 dev_cmd->hdr.cmd = TX_CMD;
577
578 if (iwl_mvm_has_new_tx_api(mvm)) {
579 u32 rate_n_flags = 0;
580 u16 flags = 0;
581 struct iwl_mvm_sta *mvmsta = sta ?
582 iwl_mvm_sta_from_mac80211(sta) : NULL;
583 bool amsdu = false;
584
585 if (ieee80211_is_data_qos(hdr->frame_control)) {
586 u8 *qc = ieee80211_get_qos_ctl(hdr);
587
588 amsdu = *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT;
589 }
590
591 if (!info->control.hw_key)
592 flags |= IWL_TX_FLAGS_ENCRYPT_DIS;
593
594 /*
595 * For data and mgmt packets rate info comes from the fw (for
596 * new devices, older FW is somewhat broken for this). Only
597 * set rate/antenna for injected frames with fixed rate, or
598 * when no sta is given, or with older firmware.
599 */
600 if (unlikely(iwl_mvm_use_host_rate(mvm, mvmsta, hdr, info))) {
601 flags |= IWL_TX_FLAGS_CMD_RATE;
602 rate_n_flags =
603 iwl_mvm_get_tx_rate_n_flags(mvm, info, sta,
604 hdr->frame_control);
605 } else if (!ieee80211_is_data(hdr->frame_control) ||
606 mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) {
607 /* These are important frames */
608 flags |= IWL_TX_FLAGS_HIGH_PRI;
609 }
610
611 if (mvm->trans->trans_cfg->device_family >=
612 IWL_DEVICE_FAMILY_AX210) {
613 struct iwl_tx_cmd_gen3 *cmd = (void *)dev_cmd->payload;
614 u32 offload_assist = iwl_mvm_tx_csum(mvm, skb,
615 info, amsdu);
616
617 cmd->offload_assist = cpu_to_le32(offload_assist);
618
619 /* Total # bytes to be transmitted */
620 cmd->len = cpu_to_le16((u16)skb->len);
621
622 /* Copy MAC header from skb into command buffer */
623 iwl_mvm_copy_hdr(cmd->hdr, hdr, hdrlen, addr3_override);
624
625 cmd->flags = cpu_to_le16(flags);
626 cmd->rate_n_flags = cpu_to_le32(rate_n_flags);
627 } else {
628 struct iwl_tx_cmd_gen2 *cmd = (void *)dev_cmd->payload;
629 u16 offload_assist = iwl_mvm_tx_csum(mvm, skb,
630 info, amsdu);
631
632 cmd->offload_assist = cpu_to_le16(offload_assist);
633
634 /* Total # bytes to be transmitted */
635 cmd->len = cpu_to_le16((u16)skb->len);
636
637 /* Copy MAC header from skb into command buffer */
638 iwl_mvm_copy_hdr(cmd->hdr, hdr, hdrlen, addr3_override);
639
640 cmd->flags = cpu_to_le32(flags);
641 cmd->rate_n_flags = cpu_to_le32(rate_n_flags);
642 }
643 goto out;
644 }
645
646 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
647
648 if (info->control.hw_key)
649 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen);
650
651 iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id);
652
653 iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control);
654
655 /* Copy MAC header from skb into command buffer */
656 iwl_mvm_copy_hdr(tx_cmd->hdr, hdr, hdrlen, addr3_override);
657
658 out:
659 return dev_cmd;
660 }
661
iwl_mvm_skb_prepare_status(struct sk_buff * skb,struct iwl_device_tx_cmd * cmd)662 static void iwl_mvm_skb_prepare_status(struct sk_buff *skb,
663 struct iwl_device_tx_cmd *cmd)
664 {
665 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb);
666
667 memset(&skb_info->status, 0, sizeof(skb_info->status));
668 memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data));
669
670 skb_info->driver_data[1] = cmd;
671 }
672
iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm * mvm,struct iwl_mvm_vif_link_info * link,struct ieee80211_tx_info * info,struct sk_buff * skb)673 static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm,
674 struct iwl_mvm_vif_link_info *link,
675 struct ieee80211_tx_info *info,
676 struct sk_buff *skb)
677 {
678 struct ieee80211_hdr *hdr = (void *)skb->data;
679 __le16 fc = hdr->frame_control;
680
681 switch (info->control.vif->type) {
682 case NL80211_IFTYPE_AP:
683 case NL80211_IFTYPE_ADHOC:
684 /*
685 * Non-bufferable frames use the broadcast station, thus they
686 * use the probe queue.
687 * Also take care of the case where we send a deauth to a
688 * station that we don't have, or similarly an association
689 * response (with non-success status) for a station we can't
690 * accept.
691 * Also, disassociate frames might happen, particular with
692 * reason 7 ("Class 3 frame received from nonassociated STA").
693 */
694 if (ieee80211_is_mgmt(fc) &&
695 (!ieee80211_is_bufferable_mmpdu(skb) ||
696 ieee80211_is_deauth(fc) || ieee80211_is_disassoc(fc)))
697 return link->mgmt_queue;
698
699 if (!ieee80211_has_order(fc) && !ieee80211_is_probe_req(fc) &&
700 is_multicast_ether_addr(hdr->addr1))
701 return link->cab_queue;
702
703 WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC,
704 "fc=0x%02x", le16_to_cpu(fc));
705 return link->mgmt_queue;
706 case NL80211_IFTYPE_P2P_DEVICE:
707 if (ieee80211_is_mgmt(fc))
708 return mvm->p2p_dev_queue;
709
710 WARN_ON_ONCE(1);
711 return mvm->p2p_dev_queue;
712 default:
713 WARN_ONCE(1, "Not a ctrl vif, no available queue\n");
714 return -1;
715 }
716 }
717
iwl_mvm_probe_resp_set_noa(struct iwl_mvm * mvm,struct sk_buff * skb)718 static void iwl_mvm_probe_resp_set_noa(struct iwl_mvm *mvm,
719 struct sk_buff *skb)
720 {
721 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
722 struct iwl_mvm_vif *mvmvif =
723 iwl_mvm_vif_from_mac80211(info->control.vif);
724 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
725 int base_len = (u8 *)mgmt->u.probe_resp.variable - (u8 *)mgmt;
726 struct iwl_probe_resp_data *resp_data;
727 const u8 *ie;
728 u8 *pos;
729 u8 match[] = {
730 (WLAN_OUI_WFA >> 16) & 0xff,
731 (WLAN_OUI_WFA >> 8) & 0xff,
732 WLAN_OUI_WFA & 0xff,
733 WLAN_OUI_TYPE_WFA_P2P,
734 };
735
736 rcu_read_lock();
737
738 resp_data = rcu_dereference(mvmvif->deflink.probe_resp_data);
739 if (!resp_data)
740 goto out;
741
742 if (!resp_data->notif.noa_active)
743 goto out;
744
745 ie = cfg80211_find_ie_match(WLAN_EID_VENDOR_SPECIFIC,
746 mgmt->u.probe_resp.variable,
747 skb->len - base_len,
748 match, 4, 2);
749 if (!ie) {
750 IWL_DEBUG_TX(mvm, "probe resp doesn't have P2P IE\n");
751 goto out;
752 }
753
754 if (skb_tailroom(skb) < resp_data->noa_len) {
755 if (pskb_expand_head(skb, 0, resp_data->noa_len, GFP_ATOMIC)) {
756 IWL_ERR(mvm,
757 "Failed to reallocate probe resp\n");
758 goto out;
759 }
760 }
761
762 pos = skb_put(skb, resp_data->noa_len);
763
764 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
765 /* Set length of IE body (not including ID and length itself) */
766 *pos++ = resp_data->noa_len - 2;
767 *pos++ = (WLAN_OUI_WFA >> 16) & 0xff;
768 *pos++ = (WLAN_OUI_WFA >> 8) & 0xff;
769 *pos++ = WLAN_OUI_WFA & 0xff;
770 *pos++ = WLAN_OUI_TYPE_WFA_P2P;
771
772 memcpy(pos, &resp_data->notif.noa_attr,
773 resp_data->noa_len - sizeof(struct ieee80211_vendor_ie));
774
775 out:
776 rcu_read_unlock();
777 }
778
iwl_mvm_tx_skb_non_sta(struct iwl_mvm * mvm,struct sk_buff * skb)779 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb)
780 {
781 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
782 struct ieee80211_tx_info info;
783 struct iwl_device_tx_cmd *dev_cmd;
784 u8 sta_id;
785 int hdrlen = ieee80211_hdrlen(hdr->frame_control);
786 __le16 fc = hdr->frame_control;
787 bool offchannel = IEEE80211_SKB_CB(skb)->flags &
788 IEEE80211_TX_CTL_TX_OFFCHAN;
789 int queue = -1;
790
791 if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc))
792 return -1;
793
794 memcpy(&info, skb->cb, sizeof(info));
795
796 if (WARN_ON_ONCE(skb->len > IEEE80211_MAX_DATA_LEN + hdrlen))
797 return -1;
798
799 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU))
800 return -1;
801
802 if (info.control.vif) {
803 struct iwl_mvm_vif *mvmvif =
804 iwl_mvm_vif_from_mac80211(info.control.vif);
805 bool p2p_aux = iwl_mvm_has_p2p_over_aux(mvm);
806
807 if ((info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE &&
808 p2p_aux) ||
809 (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 * Device and STATION.
815 * P2P Device 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 * If P2P_DEV_OVER_AUX is supported (p2p_aux = true)
819 * also P2P Device uses the aux queue.
820 */
821 sta_id = mvm->aux_sta.sta_id;
822 queue = mvm->aux_queue;
823 if (WARN_ON(queue == IWL_MVM_INVALID_QUEUE))
824 return -1;
825 } else if (info.control.vif->type ==
826 NL80211_IFTYPE_P2P_DEVICE ||
827 info.control.vif->type == NL80211_IFTYPE_AP ||
828 info.control.vif->type == NL80211_IFTYPE_ADHOC) {
829 u32 link_id = u32_get_bits(info.control.flags,
830 IEEE80211_TX_CTRL_MLO_LINK);
831 struct iwl_mvm_vif_link_info *link;
832
833 if (link_id == IEEE80211_LINK_UNSPECIFIED) {
834 if (info.control.vif->active_links)
835 link_id = ffs(info.control.vif->active_links) - 1;
836 else
837 link_id = 0;
838 }
839
840 link = mvmvif->link[link_id];
841 if (WARN_ON(!link))
842 return -1;
843
844 if (!ieee80211_is_data(hdr->frame_control))
845 sta_id = link->bcast_sta.sta_id;
846 else
847 sta_id = link->mcast_sta.sta_id;
848
849 queue = iwl_mvm_get_ctrl_vif_queue(mvm, link, &info,
850 skb);
851 } else if (info.control.vif->type == NL80211_IFTYPE_MONITOR) {
852 queue = mvm->snif_queue;
853 sta_id = mvm->snif_sta.sta_id;
854 }
855 }
856
857 if (queue < 0) {
858 IWL_ERR(mvm, "No queue was found. Dropping TX\n");
859 return -1;
860 }
861
862 if (unlikely(ieee80211_is_probe_resp(fc)))
863 iwl_mvm_probe_resp_set_noa(mvm, skb);
864
865 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue);
866
867 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id,
868 NULL);
869 if (!dev_cmd)
870 return -1;
871
872 /* From now on, we cannot access info->control */
873 iwl_mvm_skb_prepare_status(skb, dev_cmd);
874
875 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) {
876 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
877 return -1;
878 }
879
880 return 0;
881 }
882
iwl_mvm_max_amsdu_size(struct iwl_mvm * mvm,struct ieee80211_sta * sta,unsigned int tid)883 unsigned int iwl_mvm_max_amsdu_size(struct iwl_mvm *mvm,
884 struct ieee80211_sta *sta, unsigned int tid)
885 {
886 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
887 u8 ac = tid_to_mac80211_ac[tid];
888 enum nl80211_band band;
889 unsigned int txf;
890 unsigned int val;
891 int lmac;
892
893 /* For HE redirect to trigger based fifos */
894 if (sta->deflink.he_cap.has_he && !WARN_ON(!iwl_mvm_has_new_tx_api(mvm)))
895 ac += 4;
896
897 txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac);
898
899 /*
900 * Don't send an AMSDU that will be longer than the TXF.
901 * Add a security margin of 256 for the TX command + headers.
902 * We also want to have the start of the next packet inside the
903 * fifo to be able to send bursts.
904 */
905 val = mvmsta->max_amsdu_len;
906
907 if (hweight16(sta->valid_links) <= 1) {
908 if (sta->valid_links) {
909 struct ieee80211_bss_conf *link_conf;
910 unsigned int link = ffs(sta->valid_links) - 1;
911
912 rcu_read_lock();
913 link_conf = rcu_dereference(mvmsta->vif->link_conf[link]);
914 if (WARN_ON(!link_conf))
915 band = NL80211_BAND_2GHZ;
916 else
917 band = link_conf->chanreq.oper.chan->band;
918 rcu_read_unlock();
919 } else {
920 band = mvmsta->vif->bss_conf.chanreq.oper.chan->band;
921 }
922
923 lmac = iwl_mvm_get_lmac_id(mvm, band);
924 } else if (fw_has_capa(&mvm->fw->ucode_capa,
925 IWL_UCODE_TLV_CAPA_CDB_SUPPORT)) {
926 /* for real MLO restrict to both LMACs if they exist */
927 lmac = IWL_LMAC_5G_INDEX;
928 val = min_t(unsigned int, val,
929 mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256);
930 lmac = IWL_LMAC_24G_INDEX;
931 } else {
932 lmac = IWL_LMAC_24G_INDEX;
933 }
934
935 return min_t(unsigned int, val,
936 mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256);
937 }
938
939 #ifdef CONFIG_INET
940
941 static int
iwl_mvm_tx_tso_segment(struct sk_buff * skb,unsigned int num_subframes,netdev_features_t netdev_flags,struct sk_buff_head * mpdus_skb)942 iwl_mvm_tx_tso_segment(struct sk_buff *skb, unsigned int num_subframes,
943 netdev_features_t netdev_flags,
944 struct sk_buff_head *mpdus_skb)
945 {
946 struct sk_buff *tmp, *next;
947 struct ieee80211_hdr *hdr = (void *)skb->data;
948 char cb[sizeof(skb->cb)];
949 u16 i = 0;
950 unsigned int tcp_payload_len;
951 unsigned int mss = skb_shinfo(skb)->gso_size;
952 bool ipv4 = (skb->protocol == htons(ETH_P_IP));
953 bool qos = ieee80211_is_data_qos(hdr->frame_control);
954 u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0;
955
956 skb_shinfo(skb)->gso_size = num_subframes * mss;
957 memcpy(cb, skb->cb, sizeof(cb));
958
959 next = skb_gso_segment(skb, netdev_flags);
960 skb_shinfo(skb)->gso_size = mss;
961 skb_shinfo(skb)->gso_type = ipv4 ? SKB_GSO_TCPV4 : SKB_GSO_TCPV6;
962
963 if (IS_ERR(next) && PTR_ERR(next) == -ENOMEM)
964 return -ENOMEM;
965
966 if (WARN_ONCE(IS_ERR(next),
967 "skb_gso_segment error: %d\n", (int)PTR_ERR(next)))
968 return PTR_ERR(next);
969
970 if (next)
971 consume_skb(skb);
972
973 skb_list_walk_safe(next, tmp, next) {
974 memcpy(tmp->cb, cb, sizeof(tmp->cb));
975 /*
976 * Compute the length of all the data added for the A-MSDU.
977 * This will be used to compute the length to write in the TX
978 * command. We have: SNAP + IP + TCP for n -1 subframes and
979 * ETH header for n subframes.
980 */
981 tcp_payload_len = skb_tail_pointer(tmp) -
982 skb_transport_header(tmp) -
983 tcp_hdrlen(tmp) + tmp->data_len;
984
985 if (ipv4)
986 ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes);
987
988 if (tcp_payload_len > mss) {
989 skb_shinfo(tmp)->gso_size = mss;
990 skb_shinfo(tmp)->gso_type = ipv4 ? SKB_GSO_TCPV4 :
991 SKB_GSO_TCPV6;
992 } else {
993 if (qos) {
994 u8 *qc;
995
996 if (ipv4)
997 ip_send_check(ip_hdr(tmp));
998
999 qc = ieee80211_get_qos_ctl((void *)tmp->data);
1000 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
1001 }
1002 skb_shinfo(tmp)->gso_size = 0;
1003 }
1004
1005 skb_mark_not_on_list(tmp);
1006 __skb_queue_tail(mpdus_skb, tmp);
1007 i++;
1008 }
1009
1010 return 0;
1011 }
1012
iwl_mvm_tx_tso(struct iwl_mvm * mvm,struct sk_buff * skb,struct ieee80211_tx_info * info,struct ieee80211_sta * sta,struct sk_buff_head * mpdus_skb)1013 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
1014 struct ieee80211_tx_info *info,
1015 struct ieee80211_sta *sta,
1016 struct sk_buff_head *mpdus_skb)
1017 {
1018 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1019 struct ieee80211_hdr *hdr = (void *)skb->data;
1020 unsigned int mss = skb_shinfo(skb)->gso_size;
1021 unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len;
1022 u16 snap_ip_tcp, pad;
1023 netdev_features_t netdev_flags = NETIF_F_CSUM_MASK | NETIF_F_SG;
1024 u8 tid;
1025
1026 snap_ip_tcp = 8 + skb_network_header_len(skb) + tcp_hdrlen(skb);
1027
1028 if (!mvmsta->max_amsdu_len ||
1029 !ieee80211_is_data_qos(hdr->frame_control) ||
1030 !mvmsta->amsdu_enabled)
1031 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
1032
1033 /*
1034 * Do not build AMSDU for IPv6 with extension headers.
1035 * ask stack to segment and checkum the generated MPDUs for us.
1036 */
1037 if (skb->protocol == htons(ETH_P_IPV6) &&
1038 ((struct ipv6hdr *)skb_network_header(skb))->nexthdr !=
1039 IPPROTO_TCP) {
1040 netdev_flags &= ~NETIF_F_CSUM_MASK;
1041 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
1042 }
1043
1044 tid = ieee80211_get_tid(hdr);
1045 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
1046 return -EINVAL;
1047
1048 /*
1049 * No need to lock amsdu_in_ampdu_allowed since it can't be modified
1050 * during an BA session.
1051 */
1052 if ((info->flags & IEEE80211_TX_CTL_AMPDU &&
1053 !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) ||
1054 !(mvmsta->amsdu_enabled & BIT(tid)))
1055 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
1056
1057 /*
1058 * Take the min of ieee80211 station and mvm station
1059 */
1060 max_amsdu_len =
1061 min_t(unsigned int, sta->cur->max_amsdu_len,
1062 iwl_mvm_max_amsdu_size(mvm, sta, tid));
1063
1064 /*
1065 * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not
1066 * supported. This is a spec requirement (IEEE 802.11-2015
1067 * section 8.7.3 NOTE 3).
1068 */
1069 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
1070 !sta->deflink.vht_cap.vht_supported)
1071 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095);
1072
1073 /* Sub frame header + SNAP + IP header + TCP header + MSS */
1074 subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss;
1075 pad = (4 - subf_len) & 0x3;
1076
1077 /*
1078 * If we have N subframes in the A-MSDU, then the A-MSDU's size is
1079 * N * subf_len + (N - 1) * pad.
1080 */
1081 num_subframes = (max_amsdu_len + pad) / (subf_len + pad);
1082
1083 if (sta->max_amsdu_subframes &&
1084 num_subframes > sta->max_amsdu_subframes)
1085 num_subframes = sta->max_amsdu_subframes;
1086
1087 tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
1088 tcp_hdrlen(skb) + skb->data_len;
1089
1090 /*
1091 * Make sure we have enough TBs for the A-MSDU:
1092 * 2 for each subframe
1093 * 1 more for each fragment
1094 * 1 more for the potential data in the header
1095 */
1096 if ((num_subframes * 2 + skb_shinfo(skb)->nr_frags + 1) >
1097 mvm->trans->max_skb_frags)
1098 num_subframes = 1;
1099
1100 if (num_subframes > 1)
1101 *ieee80211_get_qos_ctl(hdr) |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
1102
1103 /* This skb fits in one single A-MSDU */
1104 if (num_subframes * mss >= tcp_payload_len) {
1105 __skb_queue_tail(mpdus_skb, skb);
1106 return 0;
1107 }
1108
1109 /*
1110 * Trick the segmentation function to make it
1111 * create SKBs that can fit into one A-MSDU.
1112 */
1113 return iwl_mvm_tx_tso_segment(skb, num_subframes, netdev_flags,
1114 mpdus_skb);
1115 }
1116 #else /* CONFIG_INET */
iwl_mvm_tx_tso(struct iwl_mvm * mvm,struct sk_buff * skb,struct ieee80211_tx_info * info,struct ieee80211_sta * sta,struct sk_buff_head * mpdus_skb)1117 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
1118 struct ieee80211_tx_info *info,
1119 struct ieee80211_sta *sta,
1120 struct sk_buff_head *mpdus_skb)
1121 {
1122 /* Impossible to get TSO with CONFIG_INET */
1123 WARN_ON(1);
1124
1125 return -1;
1126 }
1127 #endif
1128
1129 /* Check if there are any timed-out TIDs on a given shared TXQ */
iwl_mvm_txq_should_update(struct iwl_mvm * mvm,int txq_id)1130 static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id)
1131 {
1132 unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap;
1133 unsigned long now = jiffies;
1134 int tid;
1135
1136 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1137 return false;
1138
1139 for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) {
1140 if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] +
1141 IWL_MVM_DQA_QUEUE_TIMEOUT, now))
1142 return true;
1143 }
1144
1145 return false;
1146 }
1147
iwl_mvm_tx_airtime(struct iwl_mvm * mvm,struct iwl_mvm_sta * mvmsta,int airtime)1148 static void iwl_mvm_tx_airtime(struct iwl_mvm *mvm,
1149 struct iwl_mvm_sta *mvmsta,
1150 int airtime)
1151 {
1152 int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
1153 struct iwl_mvm_tcm_mac *mdata;
1154
1155 if (mac >= NUM_MAC_INDEX_DRIVER)
1156 return;
1157
1158 mdata = &mvm->tcm.data[mac];
1159
1160 if (mvm->tcm.paused)
1161 return;
1162
1163 if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD))
1164 schedule_delayed_work(&mvm->tcm.work, 0);
1165
1166 mdata->tx.airtime += airtime;
1167 }
1168
iwl_mvm_tx_pkt_queued(struct iwl_mvm * mvm,struct iwl_mvm_sta * mvmsta,int tid)1169 static int iwl_mvm_tx_pkt_queued(struct iwl_mvm *mvm,
1170 struct iwl_mvm_sta *mvmsta, int tid)
1171 {
1172 u32 ac = tid_to_mac80211_ac[tid];
1173 int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
1174 struct iwl_mvm_tcm_mac *mdata;
1175
1176 if (mac >= NUM_MAC_INDEX_DRIVER)
1177 return -EINVAL;
1178
1179 mdata = &mvm->tcm.data[mac];
1180
1181 mdata->tx.pkts[ac]++;
1182
1183 return 0;
1184 }
1185
1186 /*
1187 * Sets the fields in the Tx cmd that are crypto related.
1188 *
1189 * This function must be called with BHs disabled.
1190 */
iwl_mvm_tx_mpdu(struct iwl_mvm * mvm,struct sk_buff * skb,struct ieee80211_tx_info * info,struct ieee80211_sta * sta,const u8 * addr3_override)1191 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb,
1192 struct ieee80211_tx_info *info,
1193 struct ieee80211_sta *sta,
1194 const u8 *addr3_override)
1195 {
1196 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1197 struct iwl_mvm_sta *mvmsta;
1198 struct iwl_device_tx_cmd *dev_cmd;
1199 __le16 fc;
1200 u16 seq_number = 0;
1201 u8 tid = IWL_MAX_TID_COUNT;
1202 u16 txq_id;
1203 bool is_ampdu = false;
1204 int hdrlen;
1205
1206 if (WARN_ON_ONCE(!sta))
1207 return -1;
1208
1209 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1210 fc = hdr->frame_control;
1211 hdrlen = ieee80211_hdrlen(fc);
1212
1213 if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc))
1214 return -1;
1215
1216 if (WARN_ON_ONCE(mvmsta->deflink.sta_id == IWL_MVM_INVALID_STA))
1217 return -1;
1218
1219 if (unlikely(ieee80211_is_any_nullfunc(fc)) && sta->deflink.he_cap.has_he)
1220 return -1;
1221
1222 if (unlikely(ieee80211_is_probe_resp(fc)))
1223 iwl_mvm_probe_resp_set_noa(mvm, skb);
1224
1225 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen,
1226 sta, mvmsta->deflink.sta_id,
1227 addr3_override);
1228 if (!dev_cmd)
1229 goto drop;
1230
1231 /*
1232 * we handle that entirely ourselves -- for uAPSD the firmware
1233 * will always send a notification, and for PS-Poll responses
1234 * we'll notify mac80211 when getting frame status
1235 */
1236 info->flags &= ~IEEE80211_TX_STATUS_EOSP;
1237
1238 spin_lock(&mvmsta->lock);
1239
1240 /* nullfunc frames should go to the MGMT queue regardless of QOS,
1241 * the conditions of !ieee80211_is_qos_nullfunc(fc) and
1242 * !ieee80211_is_data_qos(fc) keep the default assignment of MGMT TID
1243 */
1244 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
1245 tid = ieee80211_get_tid(hdr);
1246 if (WARN_ONCE(tid >= IWL_MAX_TID_COUNT, "Invalid TID %d", tid))
1247 goto drop_unlock_sta;
1248
1249 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU;
1250 if (WARN_ONCE(is_ampdu &&
1251 mvmsta->tid_data[tid].state != IWL_AGG_ON,
1252 "Invalid internal agg state %d for TID %d",
1253 mvmsta->tid_data[tid].state, tid))
1254 goto drop_unlock_sta;
1255
1256 seq_number = mvmsta->tid_data[tid].seq_number;
1257 seq_number &= IEEE80211_SCTL_SEQ;
1258
1259 if (!iwl_mvm_has_new_tx_api(mvm)) {
1260 struct iwl_tx_cmd *tx_cmd = (void *)dev_cmd->payload;
1261
1262 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
1263 hdr->seq_ctrl |= cpu_to_le16(seq_number);
1264 /* update the tx_cmd hdr as it was already copied */
1265 tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl;
1266 }
1267 } else if (ieee80211_is_data(fc) && !ieee80211_is_data_qos(fc) &&
1268 !ieee80211_is_nullfunc(fc)) {
1269 tid = IWL_TID_NON_QOS;
1270 }
1271
1272 txq_id = mvmsta->tid_data[tid].txq_id;
1273
1274 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
1275
1276 if (WARN_ONCE(txq_id == IWL_MVM_INVALID_QUEUE, "Invalid TXQ id")) {
1277 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1278 spin_unlock(&mvmsta->lock);
1279 return -1;
1280 }
1281
1282 if (!iwl_mvm_has_new_tx_api(mvm)) {
1283 /* Keep track of the time of the last frame for this RA/TID */
1284 mvm->queue_info[txq_id].last_frame_time[tid] = jiffies;
1285
1286 /*
1287 * If we have timed-out TIDs - schedule the worker that will
1288 * reconfig the queues and update them
1289 *
1290 * Note that the no lock is taken here in order to not serialize
1291 * the TX flow. This isn't dangerous because scheduling
1292 * mvm->add_stream_wk can't ruin the state, and if we DON'T
1293 * schedule it due to some race condition then next TX we get
1294 * here we will.
1295 */
1296 if (unlikely(mvm->queue_info[txq_id].status ==
1297 IWL_MVM_QUEUE_SHARED &&
1298 iwl_mvm_txq_should_update(mvm, txq_id)))
1299 schedule_work(&mvm->add_stream_wk);
1300 }
1301
1302 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x len %d\n",
1303 mvmsta->deflink.sta_id, tid, txq_id,
1304 IEEE80211_SEQ_TO_SN(seq_number), skb->len);
1305
1306 /* From now on, we cannot access info->control */
1307 iwl_mvm_skb_prepare_status(skb, dev_cmd);
1308
1309 /*
1310 * The IV is introduced by the HW for new tx api, and it is not present
1311 * in the skb, hence, don't tell iwl_mvm_mei_tx_copy_to_csme about the
1312 * IV for those devices.
1313 */
1314 if (ieee80211_is_data(fc))
1315 iwl_mvm_mei_tx_copy_to_csme(mvm, skb,
1316 info->control.hw_key &&
1317 !iwl_mvm_has_new_tx_api(mvm) ?
1318 info->control.hw_key->iv_len : 0);
1319
1320 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id))
1321 goto drop_unlock_sta;
1322
1323 if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc))
1324 mvmsta->tid_data[tid].seq_number = seq_number + 0x10;
1325
1326 spin_unlock(&mvmsta->lock);
1327
1328 if (iwl_mvm_tx_pkt_queued(mvm, mvmsta,
1329 tid == IWL_MAX_TID_COUNT ? 0 : tid))
1330 goto drop;
1331
1332 return 0;
1333
1334 drop_unlock_sta:
1335 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1336 spin_unlock(&mvmsta->lock);
1337 drop:
1338 IWL_DEBUG_TX(mvm, "TX to [%d|%d] dropped\n", mvmsta->deflink.sta_id,
1339 tid);
1340 return -1;
1341 }
1342
iwl_mvm_tx_skb_sta(struct iwl_mvm * mvm,struct sk_buff * skb,struct ieee80211_sta * sta)1343 int iwl_mvm_tx_skb_sta(struct iwl_mvm *mvm, struct sk_buff *skb,
1344 struct ieee80211_sta *sta)
1345 {
1346 struct iwl_mvm_sta *mvmsta;
1347 struct ieee80211_tx_info info;
1348 struct sk_buff_head mpdus_skbs;
1349 struct ieee80211_vif *vif;
1350 unsigned int payload_len;
1351 int ret;
1352 struct sk_buff *orig_skb = skb;
1353 const u8 *addr3;
1354
1355 if (WARN_ON_ONCE(!sta))
1356 return -1;
1357
1358 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1359
1360 if (WARN_ON_ONCE(mvmsta->deflink.sta_id == IWL_MVM_INVALID_STA))
1361 return -1;
1362
1363 memcpy(&info, skb->cb, sizeof(info));
1364
1365 if (!skb_is_gso(skb))
1366 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta, NULL);
1367
1368 payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
1369 tcp_hdrlen(skb) + skb->data_len;
1370
1371 if (payload_len <= skb_shinfo(skb)->gso_size)
1372 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta, NULL);
1373
1374 __skb_queue_head_init(&mpdus_skbs);
1375
1376 vif = info.control.vif;
1377 if (!vif)
1378 return -1;
1379
1380 ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs);
1381 if (ret)
1382 return ret;
1383
1384 WARN_ON(skb_queue_empty(&mpdus_skbs));
1385
1386 /*
1387 * As described in IEEE sta 802.11-2020, table 9-30 (Address
1388 * field contents), A-MSDU address 3 should contain the BSSID
1389 * address.
1390 * Pass address 3 down to iwl_mvm_tx_mpdu() and further to set it
1391 * in the command header. We need to preserve the original
1392 * address 3 in the skb header to correctly create all the
1393 * A-MSDU subframe headers from it.
1394 */
1395 switch (vif->type) {
1396 case NL80211_IFTYPE_STATION:
1397 addr3 = vif->cfg.ap_addr;
1398 break;
1399 case NL80211_IFTYPE_AP:
1400 addr3 = vif->addr;
1401 break;
1402 default:
1403 addr3 = NULL;
1404 break;
1405 }
1406
1407 while (!skb_queue_empty(&mpdus_skbs)) {
1408 struct ieee80211_hdr *hdr;
1409 bool amsdu;
1410
1411 skb = __skb_dequeue(&mpdus_skbs);
1412 hdr = (void *)skb->data;
1413 amsdu = ieee80211_is_data_qos(hdr->frame_control) &&
1414 (*ieee80211_get_qos_ctl(hdr) &
1415 IEEE80211_QOS_CTL_A_MSDU_PRESENT);
1416
1417 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta,
1418 amsdu ? addr3 : NULL);
1419 if (ret) {
1420 /* Free skbs created as part of TSO logic that have not yet been dequeued */
1421 __skb_queue_purge(&mpdus_skbs);
1422 /* skb here is not necessarily same as skb that entered this method,
1423 * so free it explicitly.
1424 */
1425 if (skb == orig_skb)
1426 ieee80211_free_txskb(mvm->hw, skb);
1427 else
1428 kfree_skb(skb);
1429 /* there was error, but we consumed skb one way or another, so return 0 */
1430 return 0;
1431 }
1432 }
1433
1434 return 0;
1435 }
1436
iwl_mvm_check_ratid_empty(struct iwl_mvm * mvm,struct ieee80211_sta * sta,u8 tid)1437 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm,
1438 struct ieee80211_sta *sta, u8 tid)
1439 {
1440 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1441 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1442 struct ieee80211_vif *vif = mvmsta->vif;
1443 u16 normalized_ssn;
1444
1445 lockdep_assert_held(&mvmsta->lock);
1446
1447 if ((tid_data->state == IWL_AGG_ON ||
1448 tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) &&
1449 iwl_mvm_tid_queued(mvm, tid_data) == 0) {
1450 /*
1451 * Now that this aggregation or DQA queue is empty tell
1452 * mac80211 so it knows we no longer have frames buffered for
1453 * the station on this TID (for the TIM bitmap calculation.)
1454 */
1455 ieee80211_sta_set_buffered(sta, tid, false);
1456 }
1457
1458 /*
1459 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
1460 * to align the wrap around of ssn so we compare relevant values.
1461 */
1462 normalized_ssn = tid_data->ssn;
1463 if (mvm->trans->trans_cfg->gen2)
1464 normalized_ssn &= 0xff;
1465
1466 if (normalized_ssn != tid_data->next_reclaimed)
1467 return;
1468
1469 switch (tid_data->state) {
1470 case IWL_EMPTYING_HW_QUEUE_ADDBA:
1471 IWL_DEBUG_TX_QUEUES(mvm,
1472 "Can continue addBA flow ssn = next_recl = %d\n",
1473 tid_data->next_reclaimed);
1474 tid_data->state = IWL_AGG_STARTING;
1475 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1476 break;
1477
1478 case IWL_EMPTYING_HW_QUEUE_DELBA:
1479 IWL_DEBUG_TX_QUEUES(mvm,
1480 "Can continue DELBA flow ssn = next_recl = %d\n",
1481 tid_data->next_reclaimed);
1482 tid_data->state = IWL_AGG_OFF;
1483 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1484 break;
1485
1486 default:
1487 break;
1488 }
1489 }
1490
1491 #ifdef CONFIG_IWLWIFI_DEBUG
iwl_mvm_get_tx_fail_reason(u32 status)1492 const char *iwl_mvm_get_tx_fail_reason(u32 status)
1493 {
1494 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
1495 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
1496
1497 switch (status & TX_STATUS_MSK) {
1498 case TX_STATUS_SUCCESS:
1499 return "SUCCESS";
1500 TX_STATUS_POSTPONE(DELAY);
1501 TX_STATUS_POSTPONE(FEW_BYTES);
1502 TX_STATUS_POSTPONE(BT_PRIO);
1503 TX_STATUS_POSTPONE(QUIET_PERIOD);
1504 TX_STATUS_POSTPONE(CALC_TTAK);
1505 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
1506 TX_STATUS_FAIL(SHORT_LIMIT);
1507 TX_STATUS_FAIL(LONG_LIMIT);
1508 TX_STATUS_FAIL(UNDERRUN);
1509 TX_STATUS_FAIL(DRAIN_FLOW);
1510 TX_STATUS_FAIL(RFKILL_FLUSH);
1511 TX_STATUS_FAIL(LIFE_EXPIRE);
1512 TX_STATUS_FAIL(DEST_PS);
1513 TX_STATUS_FAIL(HOST_ABORTED);
1514 TX_STATUS_FAIL(BT_RETRY);
1515 TX_STATUS_FAIL(STA_INVALID);
1516 TX_STATUS_FAIL(FRAG_DROPPED);
1517 TX_STATUS_FAIL(TID_DISABLE);
1518 TX_STATUS_FAIL(FIFO_FLUSHED);
1519 TX_STATUS_FAIL(SMALL_CF_POLL);
1520 TX_STATUS_FAIL(FW_DROP);
1521 TX_STATUS_FAIL(STA_COLOR_MISMATCH);
1522 }
1523
1524 return "UNKNOWN";
1525
1526 #undef TX_STATUS_FAIL
1527 #undef TX_STATUS_POSTPONE
1528 }
1529 #endif /* CONFIG_IWLWIFI_DEBUG */
1530
iwl_mvm_get_hwrate_chan_width(u32 chan_width)1531 static int iwl_mvm_get_hwrate_chan_width(u32 chan_width)
1532 {
1533 switch (chan_width) {
1534 case RATE_MCS_CHAN_WIDTH_20:
1535 return 0;
1536 case RATE_MCS_CHAN_WIDTH_40:
1537 return IEEE80211_TX_RC_40_MHZ_WIDTH;
1538 case RATE_MCS_CHAN_WIDTH_80:
1539 return IEEE80211_TX_RC_80_MHZ_WIDTH;
1540 case RATE_MCS_CHAN_WIDTH_160:
1541 return IEEE80211_TX_RC_160_MHZ_WIDTH;
1542 default:
1543 return 0;
1544 }
1545 }
1546
iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags,enum nl80211_band band,struct ieee80211_tx_rate * r)1547 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags,
1548 enum nl80211_band band,
1549 struct ieee80211_tx_rate *r)
1550 {
1551 u32 format = rate_n_flags & RATE_MCS_MOD_TYPE_MSK;
1552 u32 rate = format == RATE_MCS_HT_MSK ?
1553 RATE_HT_MCS_INDEX(rate_n_flags) :
1554 rate_n_flags & RATE_MCS_CODE_MSK;
1555
1556 r->flags |=
1557 iwl_mvm_get_hwrate_chan_width(rate_n_flags &
1558 RATE_MCS_CHAN_WIDTH_MSK);
1559
1560 if (rate_n_flags & RATE_MCS_SGI_MSK)
1561 r->flags |= IEEE80211_TX_RC_SHORT_GI;
1562 if (format == RATE_MCS_HT_MSK) {
1563 r->flags |= IEEE80211_TX_RC_MCS;
1564 r->idx = rate;
1565 } else if (format == RATE_MCS_VHT_MSK) {
1566 ieee80211_rate_set_vht(r, rate,
1567 FIELD_GET(RATE_MCS_NSS_MSK,
1568 rate_n_flags) + 1);
1569 r->flags |= IEEE80211_TX_RC_VHT_MCS;
1570 } else if (format == RATE_MCS_HE_MSK) {
1571 /* mac80211 cannot do this without ieee80211_tx_status_ext()
1572 * but it only matters for radiotap */
1573 r->idx = 0;
1574 } else {
1575 r->idx = iwl_mvm_legacy_hw_idx_to_mac80211_idx(rate_n_flags,
1576 band);
1577 }
1578 }
1579
iwl_mvm_hwrate_to_tx_rate_v1(u32 rate_n_flags,enum nl80211_band band,struct ieee80211_tx_rate * r)1580 void iwl_mvm_hwrate_to_tx_rate_v1(u32 rate_n_flags,
1581 enum nl80211_band band,
1582 struct ieee80211_tx_rate *r)
1583 {
1584 if (rate_n_flags & RATE_HT_MCS_GF_MSK)
1585 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
1586
1587 r->flags |=
1588 iwl_mvm_get_hwrate_chan_width(rate_n_flags &
1589 RATE_MCS_CHAN_WIDTH_MSK_V1);
1590
1591 if (rate_n_flags & RATE_MCS_SGI_MSK_V1)
1592 r->flags |= IEEE80211_TX_RC_SHORT_GI;
1593 if (rate_n_flags & RATE_MCS_HT_MSK_V1) {
1594 r->flags |= IEEE80211_TX_RC_MCS;
1595 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK_V1;
1596 } else if (rate_n_flags & RATE_MCS_VHT_MSK_V1) {
1597 ieee80211_rate_set_vht(
1598 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK,
1599 FIELD_GET(RATE_MCS_NSS_MSK, rate_n_flags) + 1);
1600 r->flags |= IEEE80211_TX_RC_VHT_MCS;
1601 } else {
1602 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
1603 band);
1604 }
1605 }
1606
1607 /*
1608 * translate ucode response to mac80211 tx status control values
1609 */
iwl_mvm_hwrate_to_tx_status(const struct iwl_fw * fw,u32 rate_n_flags,struct ieee80211_tx_info * info)1610 static void iwl_mvm_hwrate_to_tx_status(const struct iwl_fw *fw,
1611 u32 rate_n_flags,
1612 struct ieee80211_tx_info *info)
1613 {
1614 struct ieee80211_tx_rate *r = &info->status.rates[0];
1615
1616 if (iwl_fw_lookup_notif_ver(fw, LONG_GROUP,
1617 TX_CMD, 0) <= 6)
1618 rate_n_flags = iwl_new_rate_from_v1(rate_n_flags);
1619
1620 info->status.antenna =
1621 ((rate_n_flags & RATE_MCS_ANT_AB_MSK) >> RATE_MCS_ANT_POS);
1622 iwl_mvm_hwrate_to_tx_rate(rate_n_flags,
1623 info->band, r);
1624 }
1625
iwl_mvm_tx_status_check_trigger(struct iwl_mvm * mvm,u32 status,__le16 frame_control)1626 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm,
1627 u32 status, __le16 frame_control)
1628 {
1629 struct iwl_fw_dbg_trigger_tlv *trig;
1630 struct iwl_fw_dbg_trigger_tx_status *status_trig;
1631 int i;
1632
1633 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS) {
1634 enum iwl_fw_ini_time_point tp =
1635 IWL_FW_INI_TIME_POINT_TX_FAILED;
1636
1637 if (ieee80211_is_action(frame_control))
1638 tp = IWL_FW_INI_TIME_POINT_TX_WFD_ACTION_FRAME_FAILED;
1639
1640 iwl_dbg_tlv_time_point(&mvm->fwrt,
1641 tp, NULL);
1642 return;
1643 }
1644
1645 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL,
1646 FW_DBG_TRIGGER_TX_STATUS);
1647 if (!trig)
1648 return;
1649
1650 status_trig = (void *)trig->data;
1651
1652 for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) {
1653 /* don't collect on status 0 */
1654 if (!status_trig->statuses[i].status)
1655 break;
1656
1657 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK))
1658 continue;
1659
1660 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
1661 "Tx status %d was received",
1662 status & TX_STATUS_MSK);
1663 break;
1664 }
1665 }
1666
1667 /*
1668 * iwl_mvm_get_scd_ssn - returns the SSN of the SCD
1669 * @tx_resp: the Tx response from the fw (agg or non-agg)
1670 *
1671 * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since
1672 * it can't know that everything will go well until the end of the AMPDU, it
1673 * can't know in advance the number of MPDUs that will be sent in the current
1674 * batch. This is why it writes the agg Tx response while it fetches the MPDUs.
1675 * Hence, it can't know in advance what the SSN of the SCD will be at the end
1676 * of the batch. This is why the SSN of the SCD is written at the end of the
1677 * whole struct at a variable offset. This function knows how to cope with the
1678 * variable offset and returns the SSN of the SCD.
1679 *
1680 * For 22000-series and lower, this is just 12 bits. For later, 16 bits.
1681 */
iwl_mvm_get_scd_ssn(struct iwl_mvm * mvm,struct iwl_tx_resp * tx_resp)1682 static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm,
1683 struct iwl_tx_resp *tx_resp)
1684 {
1685 u32 val = le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) +
1686 tx_resp->frame_count);
1687
1688 if (mvm->trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210)
1689 return val & 0xFFFF;
1690 return val & 0xFFF;
1691 }
1692
iwl_mvm_rx_tx_cmd_single(struct iwl_mvm * mvm,struct iwl_rx_packet * pkt)1693 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm,
1694 struct iwl_rx_packet *pkt)
1695 {
1696 struct ieee80211_sta *sta;
1697 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1698 int txq_id = SEQ_TO_QUEUE(sequence);
1699 /* struct iwl_tx_resp_v3 is almost the same */
1700 struct iwl_tx_resp *tx_resp = (void *)pkt->data;
1701 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1702 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1703 struct agg_tx_status *agg_status =
1704 iwl_mvm_get_agg_status(mvm, tx_resp);
1705 u32 status = le16_to_cpu(agg_status->status);
1706 u16 ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp);
1707 struct sk_buff_head skbs;
1708 u8 skb_freed = 0;
1709 u8 lq_color;
1710 u16 next_reclaimed, seq_ctl;
1711 bool is_ndp = false;
1712
1713 __skb_queue_head_init(&skbs);
1714
1715 if (iwl_mvm_has_new_tx_api(mvm))
1716 txq_id = le16_to_cpu(tx_resp->tx_queue);
1717
1718 seq_ctl = le16_to_cpu(tx_resp->seq_ctl);
1719
1720 /* we can free until ssn % q.n_bd not inclusive */
1721 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs, false);
1722
1723 while (!skb_queue_empty(&skbs)) {
1724 struct sk_buff *skb = __skb_dequeue(&skbs);
1725 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1726 struct ieee80211_hdr *hdr = (void *)skb->data;
1727 bool flushed = false;
1728
1729 skb_freed++;
1730
1731 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1732
1733 memset(&info->status, 0, sizeof(info->status));
1734 info->flags &= ~(IEEE80211_TX_STAT_ACK | IEEE80211_TX_STAT_TX_FILTERED);
1735
1736 /* inform mac80211 about what happened with the frame */
1737 switch (status & TX_STATUS_MSK) {
1738 case TX_STATUS_SUCCESS:
1739 case TX_STATUS_DIRECT_DONE:
1740 info->flags |= IEEE80211_TX_STAT_ACK;
1741 break;
1742 case TX_STATUS_FAIL_FIFO_FLUSHED:
1743 case TX_STATUS_FAIL_DRAIN_FLOW:
1744 flushed = true;
1745 break;
1746 case TX_STATUS_FAIL_DEST_PS:
1747 /* the FW should have stopped the queue and not
1748 * return this status
1749 */
1750 IWL_ERR_LIMIT(mvm,
1751 "FW reported TX filtered, status=0x%x, FC=0x%x\n",
1752 status, le16_to_cpu(hdr->frame_control));
1753 info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
1754 break;
1755 default:
1756 break;
1757 }
1758
1759 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS &&
1760 ieee80211_is_mgmt(hdr->frame_control))
1761 iwl_mvm_toggle_tx_ant(mvm, &mvm->mgmt_last_antenna_idx);
1762
1763 /*
1764 * If we are freeing multiple frames, mark all the frames
1765 * but the first one as acked, since they were acknowledged
1766 * before
1767 * */
1768 if (skb_freed > 1)
1769 info->flags |= IEEE80211_TX_STAT_ACK;
1770
1771 iwl_mvm_tx_status_check_trigger(mvm, status, hdr->frame_control);
1772
1773 info->status.rates[0].count = tx_resp->failure_frame + 1;
1774
1775 iwl_mvm_hwrate_to_tx_status(mvm->fw,
1776 le32_to_cpu(tx_resp->initial_rate),
1777 info);
1778
1779 /* Don't assign the converted initial_rate, because driver
1780 * TLC uses this and doesn't support the new FW rate
1781 */
1782 info->status.status_driver_data[1] =
1783 (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate);
1784
1785 /* Single frame failure in an AMPDU queue => send BAR */
1786 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
1787 !(info->flags & IEEE80211_TX_STAT_ACK) &&
1788 !(info->flags & IEEE80211_TX_STAT_TX_FILTERED) && !flushed)
1789 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1790 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1791
1792 /* W/A FW bug: seq_ctl is wrong upon failure / BAR frame */
1793 if (ieee80211_is_back_req(hdr->frame_control))
1794 seq_ctl = 0;
1795 else if (status != TX_STATUS_SUCCESS)
1796 seq_ctl = le16_to_cpu(hdr->seq_ctrl);
1797
1798 if (unlikely(!seq_ctl)) {
1799 /*
1800 * If it is an NDP, we can't update next_reclaim since
1801 * its sequence control is 0. Note that for that same
1802 * reason, NDPs are never sent to A-MPDU'able queues
1803 * so that we can never have more than one freed frame
1804 * for a single Tx resonse (see WARN_ON below).
1805 */
1806 if (ieee80211_is_qos_nullfunc(hdr->frame_control))
1807 is_ndp = true;
1808 }
1809
1810 /*
1811 * TODO: this is not accurate if we are freeing more than one
1812 * packet.
1813 */
1814 info->status.tx_time =
1815 le16_to_cpu(tx_resp->wireless_media_time);
1816 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1);
1817 lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info);
1818 info->status.status_driver_data[0] =
1819 RS_DRV_DATA_PACK(lq_color, tx_resp->reduced_tpc);
1820
1821 if (likely(!iwl_mvm_time_sync_frame(mvm, skb, hdr->addr1)))
1822 ieee80211_tx_status_skb(mvm->hw, skb);
1823 }
1824
1825 /* This is an aggregation queue or might become one, so we use
1826 * the ssn since: ssn = wifi seq_num % 256.
1827 * The seq_ctl is the sequence control of the packet to which
1828 * this Tx response relates. But if there is a hole in the
1829 * bitmap of the BA we received, this Tx response may allow to
1830 * reclaim the hole and all the subsequent packets that were
1831 * already acked. In that case, seq_ctl != ssn, and the next
1832 * packet to be reclaimed will be ssn and not seq_ctl. In that
1833 * case, several packets will be reclaimed even if
1834 * frame_count = 1.
1835 *
1836 * The ssn is the index (% 256) of the latest packet that has
1837 * treated (acked / dropped) + 1.
1838 */
1839 next_reclaimed = ssn;
1840
1841 IWL_DEBUG_TX_REPLY(mvm,
1842 "TXQ %d status %s (0x%08x)\n",
1843 txq_id, iwl_mvm_get_tx_fail_reason(status), status);
1844
1845 IWL_DEBUG_TX_REPLY(mvm,
1846 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
1847 le32_to_cpu(tx_resp->initial_rate),
1848 tx_resp->failure_frame, SEQ_TO_INDEX(sequence),
1849 ssn, next_reclaimed, seq_ctl);
1850
1851 rcu_read_lock();
1852
1853 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1854 /*
1855 * sta can't be NULL otherwise it'd mean that the sta has been freed in
1856 * the firmware while we still have packets for it in the Tx queues.
1857 */
1858 if (WARN_ON_ONCE(!sta))
1859 goto out;
1860
1861 if (!IS_ERR(sta)) {
1862 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1863
1864 iwl_mvm_tx_airtime(mvm, mvmsta,
1865 le16_to_cpu(tx_resp->wireless_media_time));
1866
1867 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS &&
1868 mvmsta->sta_state < IEEE80211_STA_AUTHORIZED)
1869 iwl_mvm_toggle_tx_ant(mvm, &mvmsta->tx_ant);
1870
1871 if (sta->wme && tid != IWL_MGMT_TID) {
1872 struct iwl_mvm_tid_data *tid_data =
1873 &mvmsta->tid_data[tid];
1874 bool send_eosp_ndp = false;
1875
1876 spin_lock_bh(&mvmsta->lock);
1877
1878 if (!is_ndp) {
1879 tid_data->next_reclaimed = next_reclaimed;
1880 IWL_DEBUG_TX_REPLY(mvm,
1881 "Next reclaimed packet:%d\n",
1882 next_reclaimed);
1883 iwl_mvm_count_mpdu(mvmsta, sta_id, 1, true, 0);
1884 } else {
1885 IWL_DEBUG_TX_REPLY(mvm,
1886 "NDP - don't update next_reclaimed\n");
1887 }
1888
1889 iwl_mvm_check_ratid_empty(mvm, sta, tid);
1890
1891 if (mvmsta->sleep_tx_count) {
1892 mvmsta->sleep_tx_count--;
1893 if (mvmsta->sleep_tx_count &&
1894 !iwl_mvm_tid_queued(mvm, tid_data)) {
1895 /*
1896 * The number of frames in the queue
1897 * dropped to 0 even if we sent less
1898 * frames than we thought we had on the
1899 * Tx queue.
1900 * This means we had holes in the BA
1901 * window that we just filled, ask
1902 * mac80211 to send EOSP since the
1903 * firmware won't know how to do that.
1904 * Send NDP and the firmware will send
1905 * EOSP notification that will trigger
1906 * a call to ieee80211_sta_eosp().
1907 */
1908 send_eosp_ndp = true;
1909 }
1910 }
1911
1912 spin_unlock_bh(&mvmsta->lock);
1913 if (send_eosp_ndp) {
1914 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta,
1915 IEEE80211_FRAME_RELEASE_UAPSD,
1916 1, tid, false, false);
1917 mvmsta->sleep_tx_count = 0;
1918 ieee80211_send_eosp_nullfunc(sta, tid);
1919 }
1920 }
1921
1922 if (mvmsta->next_status_eosp) {
1923 mvmsta->next_status_eosp = false;
1924 ieee80211_sta_eosp(sta);
1925 }
1926 }
1927 out:
1928 rcu_read_unlock();
1929 }
1930
1931 #ifdef CONFIG_IWLWIFI_DEBUG
1932 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
iwl_get_agg_tx_status(u16 status)1933 static const char *iwl_get_agg_tx_status(u16 status)
1934 {
1935 switch (status & AGG_TX_STATE_STATUS_MSK) {
1936 AGG_TX_STATE_(TRANSMITTED);
1937 AGG_TX_STATE_(UNDERRUN);
1938 AGG_TX_STATE_(BT_PRIO);
1939 AGG_TX_STATE_(FEW_BYTES);
1940 AGG_TX_STATE_(ABORT);
1941 AGG_TX_STATE_(TX_ON_AIR_DROP);
1942 AGG_TX_STATE_(LAST_SENT_TRY_CNT);
1943 AGG_TX_STATE_(LAST_SENT_BT_KILL);
1944 AGG_TX_STATE_(SCD_QUERY);
1945 AGG_TX_STATE_(TEST_BAD_CRC32);
1946 AGG_TX_STATE_(RESPONSE);
1947 AGG_TX_STATE_(DUMP_TX);
1948 AGG_TX_STATE_(DELAY_TX);
1949 }
1950
1951 return "UNKNOWN";
1952 }
1953
iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm * mvm,struct iwl_rx_packet * pkt)1954 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1955 struct iwl_rx_packet *pkt)
1956 {
1957 struct iwl_tx_resp *tx_resp = (void *)pkt->data;
1958 struct agg_tx_status *frame_status =
1959 iwl_mvm_get_agg_status(mvm, tx_resp);
1960 int i;
1961 bool tirgger_timepoint = false;
1962
1963 for (i = 0; i < tx_resp->frame_count; i++) {
1964 u16 fstatus = le16_to_cpu(frame_status[i].status);
1965 /* In case one frame wasn't transmitted trigger time point */
1966 tirgger_timepoint |= ((fstatus & AGG_TX_STATE_STATUS_MSK) !=
1967 AGG_TX_STATE_TRANSMITTED);
1968 IWL_DEBUG_TX_REPLY(mvm,
1969 "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
1970 iwl_get_agg_tx_status(fstatus),
1971 fstatus & AGG_TX_STATE_STATUS_MSK,
1972 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >>
1973 AGG_TX_STATE_TRY_CNT_POS,
1974 le16_to_cpu(frame_status[i].sequence));
1975 }
1976
1977 if (tirgger_timepoint)
1978 iwl_dbg_tlv_time_point(&mvm->fwrt,
1979 IWL_FW_INI_TIME_POINT_TX_FAILED, NULL);
1980
1981 }
1982 #else
iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm * mvm,struct iwl_rx_packet * pkt)1983 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1984 struct iwl_rx_packet *pkt)
1985 {}
1986 #endif /* CONFIG_IWLWIFI_DEBUG */
1987
iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm * mvm,struct iwl_rx_packet * pkt)1988 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm,
1989 struct iwl_rx_packet *pkt)
1990 {
1991 struct iwl_tx_resp *tx_resp = (void *)pkt->data;
1992 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1993 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1994 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1995 struct iwl_mvm_sta *mvmsta;
1996 int queue = SEQ_TO_QUEUE(sequence);
1997 struct ieee80211_sta *sta;
1998
1999 if (WARN_ON_ONCE(queue < IWL_MVM_DQA_MIN_DATA_QUEUE &&
2000 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)))
2001 return;
2002
2003 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt);
2004
2005 rcu_read_lock();
2006
2007 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
2008
2009 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
2010 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta) || !sta->wme)) {
2011 rcu_read_unlock();
2012 return;
2013 }
2014
2015 if (!WARN_ON_ONCE(!mvmsta)) {
2016 mvmsta->tid_data[tid].rate_n_flags =
2017 le32_to_cpu(tx_resp->initial_rate);
2018 mvmsta->tid_data[tid].tx_time =
2019 le16_to_cpu(tx_resp->wireless_media_time);
2020 mvmsta->tid_data[tid].lq_color =
2021 TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info);
2022 iwl_mvm_tx_airtime(mvm, mvmsta,
2023 le16_to_cpu(tx_resp->wireless_media_time));
2024 }
2025
2026 rcu_read_unlock();
2027 }
2028
iwl_mvm_rx_tx_cmd(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)2029 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
2030 {
2031 struct iwl_rx_packet *pkt = rxb_addr(rxb);
2032 struct iwl_tx_resp *tx_resp = (void *)pkt->data;
2033
2034 if (tx_resp->frame_count == 1)
2035 iwl_mvm_rx_tx_cmd_single(mvm, pkt);
2036 else
2037 iwl_mvm_rx_tx_cmd_agg(mvm, pkt);
2038 }
2039
iwl_mvm_tx_reclaim(struct iwl_mvm * mvm,int sta_id,int tid,int txq,int index,struct ieee80211_tx_info * tx_info,u32 rate,bool is_flush)2040 static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid,
2041 int txq, int index,
2042 struct ieee80211_tx_info *tx_info, u32 rate,
2043 bool is_flush)
2044 {
2045 struct sk_buff_head reclaimed_skbs;
2046 struct iwl_mvm_tid_data *tid_data = NULL;
2047 struct ieee80211_sta *sta;
2048 struct iwl_mvm_sta *mvmsta = NULL;
2049 struct sk_buff *skb;
2050 int freed;
2051
2052 if (WARN_ONCE(sta_id >= mvm->fw->ucode_capa.num_stations ||
2053 tid > IWL_MAX_TID_COUNT,
2054 "sta_id %d tid %d", sta_id, tid))
2055 return;
2056
2057 rcu_read_lock();
2058
2059 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
2060
2061 /* Reclaiming frames for a station that has been deleted ? */
2062 if (WARN_ON_ONCE(!sta)) {
2063 rcu_read_unlock();
2064 return;
2065 }
2066
2067 __skb_queue_head_init(&reclaimed_skbs);
2068
2069 /*
2070 * Release all TFDs before the SSN, i.e. all TFDs in front of
2071 * block-ack window (we assume that they've been successfully
2072 * transmitted ... if not, it's too late anyway).
2073 */
2074 iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs, is_flush);
2075
2076 skb_queue_walk(&reclaimed_skbs, skb) {
2077 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2078
2079 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
2080
2081 memset(&info->status, 0, sizeof(info->status));
2082 /* Packet was transmitted successfully, failures come as single
2083 * frames because before failing a frame the firmware transmits
2084 * it without aggregation at least once.
2085 */
2086 if (!is_flush)
2087 info->flags |= IEEE80211_TX_STAT_ACK;
2088 else
2089 info->flags &= ~IEEE80211_TX_STAT_ACK;
2090 }
2091
2092 /*
2093 * It's possible to get a BA response after invalidating the rcu (rcu is
2094 * invalidated in order to prevent new Tx from being sent, but there may
2095 * be some frames already in-flight).
2096 * In this case we just want to reclaim, and could skip all the
2097 * sta-dependent stuff since it's in the middle of being removed
2098 * anyways.
2099 */
2100 if (IS_ERR(sta))
2101 goto out;
2102
2103 mvmsta = iwl_mvm_sta_from_mac80211(sta);
2104 tid_data = &mvmsta->tid_data[tid];
2105
2106 if (tid_data->txq_id != txq) {
2107 IWL_ERR(mvm,
2108 "invalid reclaim request: Q %d, tid %d\n",
2109 tid_data->txq_id, tid);
2110 rcu_read_unlock();
2111 return;
2112 }
2113
2114 spin_lock_bh(&mvmsta->lock);
2115
2116 tid_data->next_reclaimed = index;
2117
2118 iwl_mvm_check_ratid_empty(mvm, sta, tid);
2119
2120 freed = 0;
2121
2122 /* pack lq color from tid_data along the reduced txp */
2123 tx_info->status.status_driver_data[0] =
2124 RS_DRV_DATA_PACK(tid_data->lq_color,
2125 tx_info->status.status_driver_data[0]);
2126 tx_info->status.status_driver_data[1] = (void *)(uintptr_t)rate;
2127
2128 skb_queue_walk(&reclaimed_skbs, skb) {
2129 struct ieee80211_hdr *hdr = (void *)skb->data;
2130 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2131
2132 if (!is_flush) {
2133 if (ieee80211_is_data_qos(hdr->frame_control))
2134 freed++;
2135 else
2136 WARN_ON_ONCE(tid != IWL_MAX_TID_COUNT);
2137 }
2138
2139 /* this is the first skb we deliver in this batch */
2140 /* put the rate scaling data there */
2141 if (freed == 1) {
2142 info->flags |= IEEE80211_TX_STAT_AMPDU;
2143 memcpy(&info->status, &tx_info->status,
2144 sizeof(tx_info->status));
2145 iwl_mvm_hwrate_to_tx_status(mvm->fw, rate, info);
2146 }
2147 }
2148
2149 spin_unlock_bh(&mvmsta->lock);
2150
2151 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is
2152 * possible (i.e. first MPDU in the aggregation wasn't acked)
2153 * Still it's important to update RS about sent vs. acked.
2154 */
2155 if (!is_flush && skb_queue_empty(&reclaimed_skbs) &&
2156 !iwl_mvm_has_tlc_offload(mvm)) {
2157 struct ieee80211_chanctx_conf *chanctx_conf = NULL;
2158
2159 /* no TLC offload, so non-MLD mode */
2160 if (mvmsta->vif)
2161 chanctx_conf =
2162 rcu_dereference(mvmsta->vif->bss_conf.chanctx_conf);
2163
2164 if (WARN_ON_ONCE(!chanctx_conf))
2165 goto out;
2166
2167 tx_info->band = chanctx_conf->def.chan->band;
2168 iwl_mvm_hwrate_to_tx_status(mvm->fw, rate, tx_info);
2169
2170 IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n");
2171 iwl_mvm_rs_tx_status(mvm, sta, tid, tx_info, false);
2172 }
2173
2174 out:
2175 rcu_read_unlock();
2176
2177 while (!skb_queue_empty(&reclaimed_skbs)) {
2178 skb = __skb_dequeue(&reclaimed_skbs);
2179 ieee80211_tx_status_skb(mvm->hw, skb);
2180 }
2181 }
2182
iwl_mvm_rx_ba_notif(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)2183 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
2184 {
2185 struct iwl_rx_packet *pkt = rxb_addr(rxb);
2186 unsigned int pkt_len = iwl_rx_packet_payload_len(pkt);
2187 int sta_id, tid, txq, index;
2188 struct ieee80211_tx_info ba_info = {};
2189 struct iwl_mvm_ba_notif *ba_notif;
2190 struct iwl_mvm_tid_data *tid_data;
2191 struct iwl_mvm_sta *mvmsta;
2192
2193 ba_info.flags = IEEE80211_TX_STAT_AMPDU;
2194
2195 if (iwl_mvm_has_new_tx_api(mvm)) {
2196 struct iwl_mvm_compressed_ba_notif *ba_res =
2197 (void *)pkt->data;
2198 u8 lq_color = TX_RES_RATE_TABLE_COL_GET(ba_res->tlc_rate_info);
2199 u16 tfd_cnt;
2200 int i;
2201
2202 if (IWL_FW_CHECK(mvm, sizeof(*ba_res) > pkt_len,
2203 "short BA notification (%d)\n", pkt_len))
2204 return;
2205
2206 sta_id = ba_res->sta_id;
2207 ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done);
2208 ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed);
2209 ba_info.status.tx_time =
2210 (u16)le32_to_cpu(ba_res->wireless_time);
2211 ba_info.status.status_driver_data[0] =
2212 (void *)(uintptr_t)ba_res->reduced_txp;
2213
2214 tfd_cnt = le16_to_cpu(ba_res->tfd_cnt);
2215 if (!tfd_cnt)
2216 return;
2217
2218 if (IWL_FW_CHECK(mvm,
2219 struct_size(ba_res, tfd, tfd_cnt) > pkt_len,
2220 "short BA notification (tfds:%d, size:%d)\n",
2221 tfd_cnt, pkt_len))
2222 return;
2223
2224 IWL_DEBUG_TX_REPLY(mvm,
2225 "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n",
2226 sta_id, le32_to_cpu(ba_res->flags),
2227 le16_to_cpu(ba_res->txed),
2228 le16_to_cpu(ba_res->done));
2229
2230 rcu_read_lock();
2231
2232 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
2233 /*
2234 * It's possible to get a BA response after invalidating the rcu
2235 * (rcu is invalidated in order to prevent new Tx from being
2236 * sent, but there may be some frames already in-flight).
2237 * In this case we just want to reclaim, and could skip all the
2238 * sta-dependent stuff since it's in the middle of being removed
2239 * anyways.
2240 */
2241
2242 /* Free per TID */
2243 for (i = 0; i < tfd_cnt; i++) {
2244 struct iwl_mvm_compressed_ba_tfd *ba_tfd =
2245 &ba_res->tfd[i];
2246
2247 tid = ba_tfd->tid;
2248 if (tid == IWL_MGMT_TID)
2249 tid = IWL_MAX_TID_COUNT;
2250
2251 if (mvmsta)
2252 mvmsta->tid_data[i].lq_color = lq_color;
2253
2254 iwl_mvm_tx_reclaim(mvm, sta_id, tid,
2255 (int)(le16_to_cpu(ba_tfd->q_num)),
2256 le16_to_cpu(ba_tfd->tfd_index),
2257 &ba_info,
2258 le32_to_cpu(ba_res->tx_rate), false);
2259 }
2260
2261 if (mvmsta) {
2262 iwl_mvm_tx_airtime(mvm, mvmsta,
2263 le32_to_cpu(ba_res->wireless_time));
2264
2265 iwl_mvm_count_mpdu(mvmsta, sta_id,
2266 le16_to_cpu(ba_res->txed), true, 0);
2267 }
2268 rcu_read_unlock();
2269 return;
2270 }
2271
2272 ba_notif = (void *)pkt->data;
2273 sta_id = ba_notif->sta_id;
2274 tid = ba_notif->tid;
2275 /* "flow" corresponds to Tx queue */
2276 txq = le16_to_cpu(ba_notif->scd_flow);
2277 /* "ssn" is start of block-ack Tx window, corresponds to index
2278 * (in Tx queue's circular buffer) of first TFD/frame in window */
2279 index = le16_to_cpu(ba_notif->scd_ssn);
2280
2281 rcu_read_lock();
2282 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
2283 if (IWL_FW_CHECK(mvm, !mvmsta,
2284 "invalid STA ID %d in BA notif\n",
2285 sta_id)) {
2286 rcu_read_unlock();
2287 return;
2288 }
2289
2290 tid_data = &mvmsta->tid_data[tid];
2291
2292 ba_info.status.ampdu_ack_len = ba_notif->txed_2_done;
2293 ba_info.status.ampdu_len = ba_notif->txed;
2294 ba_info.status.tx_time = tid_data->tx_time;
2295 ba_info.status.status_driver_data[0] =
2296 (void *)(uintptr_t)ba_notif->reduced_txp;
2297
2298 rcu_read_unlock();
2299
2300 IWL_DEBUG_TX_REPLY(mvm,
2301 "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
2302 ba_notif->sta_addr, ba_notif->sta_id);
2303
2304 IWL_DEBUG_TX_REPLY(mvm,
2305 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
2306 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl),
2307 le64_to_cpu(ba_notif->bitmap), txq, index,
2308 ba_notif->txed, ba_notif->txed_2_done);
2309
2310 IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n",
2311 ba_notif->reduced_txp);
2312
2313 iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info,
2314 tid_data->rate_n_flags, false);
2315 }
2316
2317 /*
2318 * Note that there are transports that buffer frames before they reach
2319 * the firmware. This means that after flush_tx_path is called, the
2320 * queue might not be empty. The race-free way to handle this is to:
2321 * 1) set the station as draining
2322 * 2) flush the Tx path
2323 * 3) wait for the transport queues to be empty
2324 */
iwl_mvm_flush_tx_path(struct iwl_mvm * mvm,u32 tfd_msk)2325 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk)
2326 {
2327 int ret;
2328 struct iwl_tx_path_flush_cmd_v1 flush_cmd = {
2329 .queues_ctl = cpu_to_le32(tfd_msk),
2330 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH),
2331 };
2332
2333 WARN_ON(iwl_mvm_has_new_tx_api(mvm));
2334 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, 0,
2335 sizeof(flush_cmd), &flush_cmd);
2336 if (ret)
2337 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
2338 return ret;
2339 }
2340
iwl_mvm_flush_sta_tids(struct iwl_mvm * mvm,u32 sta_id,u16 tids)2341 int iwl_mvm_flush_sta_tids(struct iwl_mvm *mvm, u32 sta_id, u16 tids)
2342 {
2343 int ret;
2344 struct iwl_tx_path_flush_cmd_rsp *rsp;
2345 struct iwl_tx_path_flush_cmd flush_cmd = {
2346 .sta_id = cpu_to_le32(sta_id),
2347 .tid_mask = cpu_to_le16(tids),
2348 };
2349
2350 struct iwl_host_cmd cmd = {
2351 .id = TXPATH_FLUSH,
2352 .len = { sizeof(flush_cmd), },
2353 .data = { &flush_cmd, },
2354 };
2355
2356 WARN_ON(!iwl_mvm_has_new_tx_api(mvm));
2357
2358 if (iwl_fw_lookup_notif_ver(mvm->fw, LONG_GROUP, TXPATH_FLUSH, 0) > 0)
2359 cmd.flags |= CMD_WANT_SKB | CMD_SEND_IN_RFKILL;
2360
2361 IWL_DEBUG_TX_QUEUES(mvm, "flush for sta id %d tid mask 0x%x\n",
2362 sta_id, tids);
2363
2364 ret = iwl_mvm_send_cmd(mvm, &cmd);
2365
2366 if (ret) {
2367 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
2368 return ret;
2369 }
2370
2371 if (cmd.flags & CMD_WANT_SKB) {
2372 int i;
2373 int num_flushed_queues;
2374
2375 if (WARN_ON_ONCE(iwl_rx_packet_payload_len(cmd.resp_pkt) != sizeof(*rsp))) {
2376 ret = -EIO;
2377 goto free_rsp;
2378 }
2379
2380 rsp = (void *)cmd.resp_pkt->data;
2381
2382 if (WARN_ONCE(le16_to_cpu(rsp->sta_id) != sta_id,
2383 "sta_id %d != rsp_sta_id %d",
2384 sta_id, le16_to_cpu(rsp->sta_id))) {
2385 ret = -EIO;
2386 goto free_rsp;
2387 }
2388
2389 num_flushed_queues = le16_to_cpu(rsp->num_flushed_queues);
2390 if (WARN_ONCE(num_flushed_queues > IWL_TX_FLUSH_QUEUE_RSP,
2391 "num_flushed_queues %d", num_flushed_queues)) {
2392 ret = -EIO;
2393 goto free_rsp;
2394 }
2395
2396 for (i = 0; i < num_flushed_queues; i++) {
2397 struct ieee80211_tx_info tx_info = {};
2398 struct iwl_flush_queue_info *queue_info = &rsp->queues[i];
2399 int tid = le16_to_cpu(queue_info->tid);
2400 int read_before = le16_to_cpu(queue_info->read_before_flush);
2401 int read_after = le16_to_cpu(queue_info->read_after_flush);
2402 int queue_num = le16_to_cpu(queue_info->queue_num);
2403
2404 if (tid == IWL_MGMT_TID)
2405 tid = IWL_MAX_TID_COUNT;
2406
2407 IWL_DEBUG_TX_QUEUES(mvm,
2408 "tid %d queue_id %d read-before %d read-after %d\n",
2409 tid, queue_num, read_before, read_after);
2410
2411 iwl_mvm_tx_reclaim(mvm, sta_id, tid, queue_num, read_after,
2412 &tx_info, 0, true);
2413 }
2414 free_rsp:
2415 iwl_free_resp(&cmd);
2416 }
2417 return ret;
2418 }
2419
iwl_mvm_flush_sta(struct iwl_mvm * mvm,u32 sta_id,u32 tfd_queue_mask)2420 int iwl_mvm_flush_sta(struct iwl_mvm *mvm, u32 sta_id, u32 tfd_queue_mask)
2421 {
2422 if (iwl_mvm_has_new_tx_api(mvm))
2423 return iwl_mvm_flush_sta_tids(mvm, sta_id, 0xffff);
2424
2425 return iwl_mvm_flush_tx_path(mvm, tfd_queue_mask);
2426 }
2427