1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2 /*
3 * Copyright (C) 2012-2014, 2018-2025 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 "iwl-utils.h"
17 #include "mvm.h"
18 #include "sta.h"
19 #include "time-sync.h"
20
21 static void
iwl_mvm_bar_check_trigger(struct iwl_mvm * mvm,const u8 * addr,u16 tid,u16 ssn)22 iwl_mvm_bar_check_trigger(struct iwl_mvm *mvm, const u8 *addr,
23 u16 tid, u16 ssn)
24 {
25 struct iwl_fw_dbg_trigger_tlv *trig;
26 struct iwl_fw_dbg_trigger_ba *ba_trig;
27
28 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, FW_DBG_TRIGGER_BA);
29 if (!trig)
30 return;
31
32 ba_trig = (void *)trig->data;
33
34 if (!(le16_to_cpu(ba_trig->tx_bar) & BIT(tid)))
35 return;
36
37 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
38 "BAR sent to %pM, tid %d, ssn %d",
39 addr, tid, ssn);
40 }
41
42 #define OPT_HDR(type, skb, off) \
43 (type *)(skb_network_header(skb) + (off))
44
iwl_mvm_tx_csum(struct iwl_mvm * mvm,struct sk_buff * skb,struct ieee80211_tx_info * info,bool amsdu)45 static u32 iwl_mvm_tx_csum(struct iwl_mvm *mvm, struct sk_buff *skb,
46 struct ieee80211_tx_info *info,
47 bool amsdu)
48 {
49 struct ieee80211_hdr *hdr = (void *)skb->data;
50 u16 mh_len = ieee80211_hdrlen(hdr->frame_control);
51 u16 offload_assist = 0;
52 #if IS_ENABLED(CONFIG_INET)
53 u8 protocol = 0;
54
55 /* Do not compute checksum if already computed */
56 if (skb->ip_summed != CHECKSUM_PARTIAL)
57 goto out;
58
59 /* We do not expect to be requested to csum stuff we do not support */
60 if (WARN_ONCE(!(mvm->hw->netdev_features & IWL_TX_CSUM_NETIF_FLAGS) ||
61 (skb->protocol != htons(ETH_P_IP) &&
62 skb->protocol != htons(ETH_P_IPV6)),
63 "No support for requested checksum\n")) {
64 skb_checksum_help(skb);
65 goto out;
66 }
67
68 if (skb->protocol == htons(ETH_P_IP)) {
69 protocol = ip_hdr(skb)->protocol;
70 } else {
71 #if IS_ENABLED(CONFIG_IPV6)
72 struct ipv6hdr *ipv6h =
73 (struct ipv6hdr *)skb_network_header(skb);
74 unsigned int off = sizeof(*ipv6h);
75
76 protocol = ipv6h->nexthdr;
77 while (protocol != NEXTHDR_NONE && ipv6_ext_hdr(protocol)) {
78 struct ipv6_opt_hdr *hp;
79
80 /* only supported extension headers */
81 if (protocol != NEXTHDR_ROUTING &&
82 protocol != NEXTHDR_HOP &&
83 protocol != NEXTHDR_DEST) {
84 skb_checksum_help(skb);
85 goto out;
86 }
87
88 hp = OPT_HDR(struct ipv6_opt_hdr, skb, off);
89 protocol = hp->nexthdr;
90 off += ipv6_optlen(hp);
91 }
92 /* if we get here - protocol now should be TCP/UDP */
93 #endif
94 }
95
96 if (protocol != IPPROTO_TCP && protocol != IPPROTO_UDP) {
97 WARN_ON_ONCE(1);
98 skb_checksum_help(skb);
99 goto out;
100 }
101
102 /* enable L4 csum */
103 offload_assist |= BIT(TX_CMD_OFFLD_L4_EN);
104
105 /*
106 * Set offset to IP header (snap).
107 * We don't support tunneling so no need to take care of inner header.
108 * Size is in words.
109 */
110 offload_assist |= (4 << TX_CMD_OFFLD_IP_HDR);
111
112 /* Do IPv4 csum for AMSDU only (no IP csum for Ipv6) */
113 if (skb->protocol == htons(ETH_P_IP) && amsdu) {
114 ip_hdr(skb)->check = 0;
115 offload_assist |= BIT(TX_CMD_OFFLD_L3_EN);
116 }
117
118 /* reset UDP/TCP header csum */
119 if (protocol == IPPROTO_TCP)
120 tcp_hdr(skb)->check = 0;
121 else
122 udp_hdr(skb)->check = 0;
123
124 out:
125 #endif
126 /*
127 * mac header len should include IV, size is in words unless
128 * the IV is added by the firmware like in WEP.
129 * In new Tx API, the IV is always added by the firmware.
130 */
131 if (!iwl_mvm_has_new_tx_api(mvm) && info->control.hw_key &&
132 info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP40 &&
133 info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP104)
134 mh_len += info->control.hw_key->iv_len;
135 mh_len /= 2;
136 offload_assist |= mh_len << TX_CMD_OFFLD_MH_SIZE;
137
138 if (amsdu)
139 offload_assist |= BIT(TX_CMD_OFFLD_AMSDU);
140 else if (ieee80211_hdrlen(hdr->frame_control) % 4)
141 /* padding is inserted later in transport */
142 offload_assist |= BIT(TX_CMD_OFFLD_PAD);
143
144 return offload_assist;
145 }
146
147 /*
148 * Sets most of the Tx cmd's fields
149 */
iwl_mvm_set_tx_cmd(struct iwl_mvm * mvm,struct sk_buff * skb,struct iwl_tx_cmd_v6_params * tx_cmd_params,struct ieee80211_tx_info * info,u8 sta_id)150 void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb,
151 struct iwl_tx_cmd_v6_params *tx_cmd_params,
152 struct ieee80211_tx_info *info, u8 sta_id)
153 {
154 struct ieee80211_hdr *hdr = (void *)skb->data;
155 __le16 fc = hdr->frame_control;
156 u32 tx_flags = le32_to_cpu(tx_cmd_params->tx_flags);
157 u32 len = skb->len + FCS_LEN;
158 bool amsdu = false;
159 u8 ac;
160
161 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) ||
162 (ieee80211_is_probe_resp(fc) &&
163 !is_multicast_ether_addr(hdr->addr1)))
164 tx_flags |= TX_CMD_FLG_ACK;
165 else
166 tx_flags &= ~TX_CMD_FLG_ACK;
167
168 if (ieee80211_is_probe_resp(fc))
169 tx_flags |= TX_CMD_FLG_TSF;
170
171 if (ieee80211_has_morefrags(fc))
172 tx_flags |= TX_CMD_FLG_MORE_FRAG;
173
174 if (ieee80211_is_data_qos(fc)) {
175 u8 *qc = ieee80211_get_qos_ctl(hdr);
176 tx_cmd_params->tid_tspec = qc[0] & 0xf;
177 tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
178 amsdu = *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT;
179 } else if (ieee80211_is_back_req(fc)) {
180 struct ieee80211_bar *bar = (void *)skb->data;
181 u16 control = le16_to_cpu(bar->control);
182 u16 ssn = le16_to_cpu(bar->start_seq_num);
183
184 tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR;
185 tx_cmd_params->tid_tspec = (control &
186 IEEE80211_BAR_CTRL_TID_INFO_MASK) >>
187 IEEE80211_BAR_CTRL_TID_INFO_SHIFT;
188 WARN_ON_ONCE(tx_cmd_params->tid_tspec >= IWL_MAX_TID_COUNT);
189 iwl_mvm_bar_check_trigger(mvm, bar->ra, tx_cmd_params->tid_tspec,
190 ssn);
191 } else {
192 if (ieee80211_is_data(fc))
193 tx_cmd_params->tid_tspec = IWL_TID_NON_QOS;
194 else
195 tx_cmd_params->tid_tspec = IWL_MAX_TID_COUNT;
196
197 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
198 tx_flags |= TX_CMD_FLG_SEQ_CTL;
199 else
200 tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
201 }
202
203 /* Default to 0 (BE) when tid_spec is set to IWL_MAX_TID_COUNT */
204 if (tx_cmd_params->tid_tspec < IWL_MAX_TID_COUNT)
205 ac = tid_to_mac80211_ac[tx_cmd_params->tid_tspec];
206 else
207 ac = tid_to_mac80211_ac[0];
208
209 tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) <<
210 TX_CMD_FLG_BT_PRIO_POS;
211
212 if (ieee80211_is_mgmt(fc)) {
213 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
214 tx_cmd_params->pm_frame_timeout = cpu_to_le16(PM_FRAME_ASSOC);
215 else if (ieee80211_is_action(fc))
216 tx_cmd_params->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
217 else
218 tx_cmd_params->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
219
220 /* The spec allows Action frames in A-MPDU, we don't support
221 * it
222 */
223 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU);
224 } else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) {
225 tx_cmd_params->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
226 } else {
227 tx_cmd_params->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
228 }
229
230 if (ieee80211_is_data(fc) && len > mvm->rts_threshold &&
231 !is_multicast_ether_addr(hdr->addr1))
232 tx_flags |= TX_CMD_FLG_PROT_REQUIRE;
233
234 if (fw_has_capa(&mvm->fw->ucode_capa,
235 IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT) &&
236 ieee80211_action_contains_tpc(skb))
237 tx_flags |= TX_CMD_FLG_WRITE_TX_POWER;
238
239 tx_cmd_params->tx_flags = cpu_to_le32(tx_flags);
240 /* Total # bytes to be transmitted - PCIe code will adjust for A-MSDU */
241 tx_cmd_params->len = cpu_to_le16((u16)skb->len);
242 tx_cmd_params->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
243 tx_cmd_params->sta_id = sta_id;
244
245 tx_cmd_params->offload_assist =
246 cpu_to_le16(iwl_mvm_tx_csum(mvm, skb, info, amsdu));
247 }
248
iwl_mvm_get_tx_ant(struct iwl_mvm * mvm,struct ieee80211_tx_info * info,struct ieee80211_sta * sta,__le16 fc)249 static u32 iwl_mvm_get_tx_ant(struct iwl_mvm *mvm,
250 struct ieee80211_tx_info *info,
251 struct ieee80211_sta *sta, __le16 fc)
252 {
253 if (info->band == NL80211_BAND_2GHZ &&
254 !iwl_mvm_bt_coex_is_shared_ant_avail(mvm))
255 return mvm->cfg->non_shared_ant << RATE_MCS_ANT_POS;
256
257 if (sta && ieee80211_is_data(fc)) {
258 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
259
260 return BIT(mvmsta->tx_ant) << RATE_MCS_ANT_POS;
261 }
262
263 return BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS;
264 }
265
iwl_mvm_convert_rate_idx(struct iwl_mvm * mvm,struct ieee80211_tx_info * info,int rate_idx)266 static u32 iwl_mvm_convert_rate_idx(struct iwl_mvm *mvm,
267 struct ieee80211_tx_info *info,
268 int rate_idx)
269 {
270 u32 rate_flags = 0;
271 u8 rate_plcp;
272 bool is_cck;
273
274 /* if the rate isn't a well known legacy rate, take the lowest one */
275 if (rate_idx < 0 || rate_idx >= IWL_RATE_COUNT_LEGACY)
276 rate_idx = iwl_mvm_mac_ctxt_get_lowest_rate(mvm,
277 info,
278 info->control.vif);
279
280 /* Get PLCP rate for tx_cmd->rate_n_flags */
281 rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(mvm->fw, rate_idx);
282 is_cck = (rate_idx >= IWL_FIRST_CCK_RATE) &&
283 (rate_idx <= IWL_LAST_CCK_RATE);
284
285 /* Set CCK or OFDM flag */
286 if (!is_cck)
287 rate_flags |= RATE_MCS_MOD_TYPE_LEGACY_OFDM;
288 else
289 rate_flags |= RATE_MCS_MOD_TYPE_CCK;
290
291 return (u32)rate_plcp | rate_flags;
292 }
293
iwl_mvm_get_inject_tx_rate(struct iwl_mvm * mvm,struct ieee80211_tx_info * info,struct ieee80211_sta * sta,__le16 fc)294 static u32 iwl_mvm_get_inject_tx_rate(struct iwl_mvm *mvm,
295 struct ieee80211_tx_info *info,
296 struct ieee80211_sta *sta,
297 __le16 fc)
298 {
299 struct ieee80211_tx_rate *rate = &info->control.rates[0];
300 u32 result;
301
302 if (rate->flags & IEEE80211_TX_RC_VHT_MCS) {
303 u8 mcs = ieee80211_rate_get_vht_mcs(rate);
304 u8 nss = ieee80211_rate_get_vht_nss(rate);
305
306 result = RATE_MCS_MOD_TYPE_VHT;
307 result |= u32_encode_bits(mcs, RATE_VHT_MCS_RATE_CODE_MSK);
308 result |= u32_encode_bits(nss, RATE_MCS_NSS_MSK);
309 if (rate->flags & IEEE80211_TX_RC_SHORT_GI)
310 result |= RATE_MCS_SGI_MSK;
311 if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
312 result |= RATE_MCS_CHAN_WIDTH_40;
313 else if (rate->flags & IEEE80211_TX_RC_80_MHZ_WIDTH)
314 result |= RATE_MCS_CHAN_WIDTH_80;
315 else if (rate->flags & IEEE80211_TX_RC_160_MHZ_WIDTH)
316 result |= RATE_MCS_CHAN_WIDTH_160;
317 } else if (rate->flags & IEEE80211_TX_RC_MCS) {
318 result = RATE_MCS_MOD_TYPE_HT;
319 result |= u32_encode_bits(rate->idx & 0x7,
320 RATE_HT_MCS_CODE_MSK);
321 result |= u32_encode_bits(rate->idx >> 3,
322 RATE_MCS_NSS_MSK);
323 if (rate->flags & IEEE80211_TX_RC_SHORT_GI)
324 result |= RATE_MCS_SGI_MSK;
325 if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
326 result |= RATE_MCS_CHAN_WIDTH_40;
327 if (info->flags & IEEE80211_TX_CTL_LDPC)
328 result |= RATE_MCS_LDPC_MSK;
329 if (u32_get_bits(info->flags, IEEE80211_TX_CTL_STBC))
330 result |= RATE_MCS_STBC_MSK;
331 } else {
332 int rate_idx = info->control.rates[0].idx;
333
334 result = iwl_mvm_convert_rate_idx(mvm, info, rate_idx);
335 }
336
337 if (info->control.antennas)
338 result |= u32_encode_bits(info->control.antennas,
339 RATE_MCS_ANT_AB_MSK);
340 else
341 result |= iwl_mvm_get_tx_ant(mvm, info, sta, fc);
342
343 return result;
344 }
345
iwl_mvm_get_tx_rate(struct iwl_mvm * mvm,struct ieee80211_tx_info * info,struct ieee80211_sta * sta,__le16 fc)346 static u32 iwl_mvm_get_tx_rate(struct iwl_mvm *mvm,
347 struct ieee80211_tx_info *info,
348 struct ieee80211_sta *sta, __le16 fc)
349 {
350 int rate_idx = -1;
351
352 if (!ieee80211_hw_check(mvm->hw, HAS_RATE_CONTROL)) {
353 /* info->control is only relevant for non HW rate control */
354
355 /* HT rate doesn't make sense for a non data frame */
356 WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS &&
357 !ieee80211_is_data(fc),
358 "Got a HT rate (flags:0x%x/mcs:%d/fc:0x%x/state:%d) for a non data frame\n",
359 info->control.rates[0].flags,
360 info->control.rates[0].idx,
361 le16_to_cpu(fc),
362 sta ? iwl_mvm_sta_from_mac80211(sta)->sta_state : -1);
363
364 rate_idx = info->control.rates[0].idx;
365
366 /* For non 2 GHZ band, remap mac80211 rate indices into driver
367 * indices.
368 */
369 if (info->band != NL80211_BAND_2GHZ ||
370 (info->flags & IEEE80211_TX_CTL_NO_CCK_RATE))
371 rate_idx += IWL_FIRST_OFDM_RATE;
372
373 /* For 2.4 GHZ band, check that there is no need to remap */
374 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
375 }
376
377 return iwl_mvm_convert_rate_idx(mvm, info, rate_idx);
378 }
379
iwl_mvm_get_tx_rate_n_flags(struct iwl_mvm * mvm,struct ieee80211_tx_info * info,struct ieee80211_sta * sta,__le16 fc)380 static __le32 iwl_mvm_get_tx_rate_n_flags(struct iwl_mvm *mvm,
381 struct ieee80211_tx_info *info,
382 struct ieee80211_sta *sta, __le16 fc)
383 {
384 u32 rate;
385
386 if (unlikely(info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT))
387 rate = iwl_mvm_get_inject_tx_rate(mvm, info, sta, fc);
388 else
389 rate = iwl_mvm_get_tx_rate(mvm, info, sta, fc) |
390 iwl_mvm_get_tx_ant(mvm, info, sta, fc);
391
392 return iwl_mvm_v3_rate_to_fw(rate, mvm->fw_rates_ver);
393 }
394
395 /*
396 * Sets the fields in the Tx cmd that are rate related
397 */
iwl_mvm_set_tx_cmd_rate(struct iwl_mvm * mvm,struct iwl_tx_cmd_v6_params * tx_cmd_params,struct ieee80211_tx_info * info,struct ieee80211_sta * sta,__le16 fc)398 void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm,
399 struct iwl_tx_cmd_v6_params *tx_cmd_params,
400 struct ieee80211_tx_info *info,
401 struct ieee80211_sta *sta, __le16 fc)
402 {
403 /* Set retry limit on RTS packets */
404 tx_cmd_params->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT;
405
406 /* Set retry limit on DATA packets and Probe Responses*/
407 if (ieee80211_is_probe_resp(fc)) {
408 tx_cmd_params->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT;
409 tx_cmd_params->rts_retry_limit =
410 min(tx_cmd_params->data_retry_limit, tx_cmd_params->rts_retry_limit);
411 } else if (ieee80211_is_back_req(fc)) {
412 tx_cmd_params->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT;
413 } else {
414 tx_cmd_params->data_retry_limit = IWL_DEFAULT_TX_RETRY;
415 }
416
417 /*
418 * for data packets, rate info comes from the table inside the fw. This
419 * table is controlled by LINK_QUALITY commands
420 */
421
422 if (likely(ieee80211_is_data(fc) && sta &&
423 !(info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT))) {
424 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
425
426 if (mvmsta->sta_state >= IEEE80211_STA_AUTHORIZED) {
427 tx_cmd_params->initial_rate_index = 0;
428 tx_cmd_params->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE);
429 return;
430 }
431 } else if (ieee80211_is_back_req(fc)) {
432 tx_cmd_params->tx_flags |=
433 cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR);
434 }
435
436 /* Set the rate in the TX cmd */
437 tx_cmd_params->rate_n_flags = iwl_mvm_get_tx_rate_n_flags(mvm, info, sta, fc);
438 }
439
iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info * info,u8 * crypto_hdr)440 static inline void iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info *info,
441 u8 *crypto_hdr)
442 {
443 struct ieee80211_key_conf *keyconf = info->control.hw_key;
444 u64 pn;
445
446 pn = atomic64_inc_return(&keyconf->tx_pn);
447 crypto_hdr[0] = pn;
448 crypto_hdr[2] = 0;
449 crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6);
450 crypto_hdr[1] = pn >> 8;
451 crypto_hdr[4] = pn >> 16;
452 crypto_hdr[5] = pn >> 24;
453 crypto_hdr[6] = pn >> 32;
454 crypto_hdr[7] = pn >> 40;
455 }
456
457 /*
458 * Sets the fields in the Tx cmd that are crypto related
459 */
iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm * mvm,struct ieee80211_tx_info * info,struct iwl_tx_cmd_v6_params * tx_cmd_params,struct sk_buff * skb_frag,int hdrlen)460 static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm,
461 struct ieee80211_tx_info *info,
462 struct iwl_tx_cmd_v6_params *tx_cmd_params,
463 struct sk_buff *skb_frag,
464 int hdrlen)
465 {
466 struct ieee80211_key_conf *keyconf = info->control.hw_key;
467 u8 *crypto_hdr = skb_frag->data + hdrlen;
468 enum iwl_tx_cmd_sec_ctrl type = TX_CMD_SEC_CCM;
469 u64 pn;
470
471 switch (keyconf->cipher) {
472 case WLAN_CIPHER_SUITE_CCMP:
473 iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd_params);
474 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr);
475 break;
476
477 case WLAN_CIPHER_SUITE_TKIP:
478 tx_cmd_params->sec_ctl = TX_CMD_SEC_TKIP;
479 pn = atomic64_inc_return(&keyconf->tx_pn);
480 ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn);
481 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd_params->key);
482 break;
483
484 case WLAN_CIPHER_SUITE_WEP104:
485 tx_cmd_params->sec_ctl |= TX_CMD_SEC_KEY128;
486 fallthrough;
487 case WLAN_CIPHER_SUITE_WEP40:
488 tx_cmd_params->sec_ctl |= TX_CMD_SEC_WEP |
489 ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) &
490 TX_CMD_SEC_WEP_KEY_IDX_MSK);
491
492 memcpy(&tx_cmd_params->key[3], keyconf->key, keyconf->keylen);
493 break;
494 case WLAN_CIPHER_SUITE_GCMP:
495 case WLAN_CIPHER_SUITE_GCMP_256:
496 type = TX_CMD_SEC_GCMP;
497 fallthrough;
498 case WLAN_CIPHER_SUITE_CCMP_256:
499 /* TODO: Taking the key from the table might introduce a race
500 * when PTK rekeying is done, having an old packets with a PN
501 * based on the old key but the message encrypted with a new
502 * one.
503 * Need to handle this.
504 */
505 tx_cmd_params->sec_ctl |= type | TX_CMD_SEC_KEY_FROM_TABLE;
506 tx_cmd_params->key[0] = keyconf->hw_key_idx;
507 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr);
508 break;
509 default:
510 tx_cmd_params->sec_ctl |= TX_CMD_SEC_EXT;
511 }
512 }
513
iwl_mvm_use_host_rate(struct iwl_mvm * mvm,struct iwl_mvm_sta * mvmsta,struct ieee80211_hdr * hdr,struct ieee80211_tx_info * info)514 static bool iwl_mvm_use_host_rate(struct iwl_mvm *mvm,
515 struct iwl_mvm_sta *mvmsta,
516 struct ieee80211_hdr *hdr,
517 struct ieee80211_tx_info *info)
518 {
519 if (unlikely(!mvmsta))
520 return true;
521
522 if (unlikely(info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT))
523 return true;
524
525 if (likely(ieee80211_is_data(hdr->frame_control) &&
526 mvmsta->sta_state >= IEEE80211_STA_AUTHORIZED))
527 return false;
528
529 /*
530 * Not a data frame, use host rate if on an old device that
531 * can't possibly be doing MLO (firmware may be selecting a
532 * bad rate), if we might be doing MLO we need to let FW pick
533 * (since we don't necesarily know the link), but FW rate
534 * selection was fixed.
535 */
536 return mvm->trans->mac_cfg->device_family < IWL_DEVICE_FAMILY_BZ;
537 }
538
iwl_mvm_copy_hdr(void * cmd,const void * hdr,int hdrlen,const u8 * addr3_override)539 static void iwl_mvm_copy_hdr(void *cmd, const void *hdr, int hdrlen,
540 const u8 *addr3_override)
541 {
542 struct ieee80211_hdr *out_hdr = cmd;
543
544 memcpy(cmd, hdr, hdrlen);
545 if (addr3_override)
546 memcpy(out_hdr->addr3, addr3_override, ETH_ALEN);
547 }
548
549 /*
550 * Allocates and sets the Tx cmd the driver data pointers in the skb
551 */
552 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)553 iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb,
554 struct ieee80211_tx_info *info, int hdrlen,
555 struct ieee80211_sta *sta, u8 sta_id,
556 const u8 *addr3_override)
557 {
558 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
559 struct iwl_device_tx_cmd *dev_cmd;
560 struct iwl_tx_cmd_v6 *tx_cmd;
561
562 dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans);
563
564 if (unlikely(!dev_cmd))
565 return NULL;
566
567 dev_cmd->hdr.cmd = TX_CMD;
568
569 if (iwl_mvm_has_new_tx_api(mvm)) {
570 __le32 rate_n_flags = 0;
571 u16 flags = 0;
572 struct iwl_mvm_sta *mvmsta = sta ?
573 iwl_mvm_sta_from_mac80211(sta) : NULL;
574 bool amsdu = false;
575
576 if (ieee80211_is_data_qos(hdr->frame_control)) {
577 u8 *qc = ieee80211_get_qos_ctl(hdr);
578
579 amsdu = *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT;
580 }
581
582 if (!info->control.hw_key)
583 flags |= IWL_TX_FLAGS_ENCRYPT_DIS;
584
585 /*
586 * For data and mgmt packets rate info comes from the fw (for
587 * new devices, older FW is somewhat broken for this). Only
588 * set rate/antenna for injected frames with fixed rate, or
589 * when no sta is given, or with older firmware.
590 */
591 if (unlikely(iwl_mvm_use_host_rate(mvm, mvmsta, hdr, info))) {
592 flags |= IWL_TX_FLAGS_CMD_RATE;
593 rate_n_flags =
594 iwl_mvm_get_tx_rate_n_flags(mvm, info, sta,
595 hdr->frame_control);
596 } else if (!ieee80211_is_data(hdr->frame_control) ||
597 mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) {
598 /* These are important frames */
599 flags |= IWL_TX_FLAGS_HIGH_PRI;
600 }
601
602 if (mvm->trans->mac_cfg->device_family >=
603 IWL_DEVICE_FAMILY_AX210) {
604 struct iwl_tx_cmd *cmd = (void *)dev_cmd->payload;
605 u32 offload_assist = iwl_mvm_tx_csum(mvm, skb,
606 info, amsdu);
607
608 cmd->offload_assist = cpu_to_le32(offload_assist);
609
610 /* Total # bytes to be transmitted */
611 cmd->len = cpu_to_le16((u16)skb->len);
612
613 /* Copy MAC header from skb into command buffer */
614 iwl_mvm_copy_hdr(cmd->hdr, hdr, hdrlen, addr3_override);
615
616 cmd->flags = cpu_to_le16(flags);
617 cmd->rate_n_flags = rate_n_flags;
618 } else {
619 struct iwl_tx_cmd_v9 *cmd = (void *)dev_cmd->payload;
620 u16 offload_assist = iwl_mvm_tx_csum(mvm, skb,
621 info, amsdu);
622
623 cmd->offload_assist = cpu_to_le16(offload_assist);
624
625 /* Total # bytes to be transmitted */
626 cmd->len = cpu_to_le16((u16)skb->len);
627
628 /* Copy MAC header from skb into command buffer */
629 iwl_mvm_copy_hdr(cmd->hdr, hdr, hdrlen, addr3_override);
630
631 cmd->flags = cpu_to_le32(flags);
632 cmd->rate_n_flags = rate_n_flags;
633 }
634 goto out;
635 }
636
637 tx_cmd = (struct iwl_tx_cmd_v6 *)dev_cmd->payload;
638
639 if (info->control.hw_key)
640 iwl_mvm_set_tx_cmd_crypto(mvm, info, &tx_cmd->params, skb, hdrlen);
641
642 iwl_mvm_set_tx_cmd(mvm, skb, &tx_cmd->params, info, sta_id);
643
644 iwl_mvm_set_tx_cmd_rate(mvm, &tx_cmd->params, info, sta, hdr->frame_control);
645
646 /* Copy MAC header from skb into command buffer */
647 iwl_mvm_copy_hdr(tx_cmd->hdr, hdr, hdrlen, addr3_override);
648
649 out:
650 return dev_cmd;
651 }
652
iwl_mvm_skb_prepare_status(struct sk_buff * skb,struct iwl_device_tx_cmd * cmd)653 static void iwl_mvm_skb_prepare_status(struct sk_buff *skb,
654 struct iwl_device_tx_cmd *cmd)
655 {
656 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb);
657
658 memset(&skb_info->status, 0, sizeof(skb_info->status));
659 memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data));
660
661 skb_info->driver_data[1] = cmd;
662 }
663
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)664 static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm,
665 struct iwl_mvm_vif_link_info *link,
666 struct ieee80211_tx_info *info,
667 struct sk_buff *skb)
668 {
669 struct ieee80211_hdr *hdr = (void *)skb->data;
670 __le16 fc = hdr->frame_control;
671
672 switch (info->control.vif->type) {
673 case NL80211_IFTYPE_AP:
674 case NL80211_IFTYPE_ADHOC:
675 /*
676 * Non-bufferable frames use the broadcast station, thus they
677 * use the probe queue.
678 * Also take care of the case where we send a deauth to a
679 * station that we don't have, or similarly an association
680 * response (with non-success status) for a station we can't
681 * accept.
682 * Also, disassociate frames might happen, particular with
683 * reason 7 ("Class 3 frame received from nonassociated STA").
684 */
685 if (ieee80211_is_mgmt(fc) &&
686 (!ieee80211_is_bufferable_mmpdu(skb) ||
687 ieee80211_is_deauth(fc) || ieee80211_is_disassoc(fc)))
688 return link->mgmt_queue;
689
690 if (!ieee80211_has_order(fc) && !ieee80211_is_probe_req(fc) &&
691 is_multicast_ether_addr(hdr->addr1))
692 return link->cab_queue;
693
694 WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC,
695 "fc=0x%02x", le16_to_cpu(fc));
696 return link->mgmt_queue;
697 case NL80211_IFTYPE_P2P_DEVICE:
698 if (ieee80211_is_mgmt(fc))
699 return mvm->p2p_dev_queue;
700
701 WARN_ON_ONCE(1);
702 return mvm->p2p_dev_queue;
703 default:
704 WARN_ONCE(1, "Not a ctrl vif, no available queue\n");
705 return -1;
706 }
707 }
708
iwl_mvm_probe_resp_set_noa(struct iwl_mvm * mvm,struct sk_buff * skb)709 static void iwl_mvm_probe_resp_set_noa(struct iwl_mvm *mvm,
710 struct sk_buff *skb)
711 {
712 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
713 struct iwl_mvm_vif *mvmvif =
714 iwl_mvm_vif_from_mac80211(info->control.vif);
715 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
716 int base_len = (u8 *)mgmt->u.probe_resp.variable - (u8 *)mgmt;
717 struct iwl_probe_resp_data *resp_data;
718 const u8 *ie;
719 u8 *pos;
720 u8 match[] = {
721 (WLAN_OUI_WFA >> 16) & 0xff,
722 (WLAN_OUI_WFA >> 8) & 0xff,
723 WLAN_OUI_WFA & 0xff,
724 WLAN_OUI_TYPE_WFA_P2P,
725 };
726
727 rcu_read_lock();
728
729 resp_data = rcu_dereference(mvmvif->deflink.probe_resp_data);
730 if (!resp_data)
731 goto out;
732
733 if (!resp_data->notif.noa_active)
734 goto out;
735
736 ie = cfg80211_find_ie_match(WLAN_EID_VENDOR_SPECIFIC,
737 mgmt->u.probe_resp.variable,
738 skb->len - base_len,
739 match, 4, 2);
740 if (!ie) {
741 IWL_DEBUG_TX(mvm, "probe resp doesn't have P2P IE\n");
742 goto out;
743 }
744
745 if (skb_tailroom(skb) < resp_data->noa_len) {
746 if (pskb_expand_head(skb, 0, resp_data->noa_len, GFP_ATOMIC)) {
747 IWL_ERR(mvm,
748 "Failed to reallocate probe resp\n");
749 goto out;
750 }
751 }
752
753 pos = skb_put(skb, resp_data->noa_len);
754
755 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
756 /* Set length of IE body (not including ID and length itself) */
757 *pos++ = resp_data->noa_len - 2;
758 *pos++ = (WLAN_OUI_WFA >> 16) & 0xff;
759 *pos++ = (WLAN_OUI_WFA >> 8) & 0xff;
760 *pos++ = WLAN_OUI_WFA & 0xff;
761 *pos++ = WLAN_OUI_TYPE_WFA_P2P;
762
763 memcpy(pos, &resp_data->notif.noa_attr,
764 resp_data->noa_len - sizeof(struct ieee80211_vendor_ie));
765
766 out:
767 rcu_read_unlock();
768 }
769
iwl_mvm_tx_skb_non_sta(struct iwl_mvm * mvm,struct sk_buff * skb)770 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb)
771 {
772 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
773 struct ieee80211_tx_info info;
774 struct iwl_device_tx_cmd *dev_cmd;
775 u8 sta_id;
776 int hdrlen = ieee80211_hdrlen(hdr->frame_control);
777 __le16 fc = hdr->frame_control;
778 bool offchannel = IEEE80211_SKB_CB(skb)->flags &
779 IEEE80211_TX_CTL_TX_OFFCHAN;
780 int queue = -1;
781
782 if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc))
783 return -1;
784
785 memcpy(&info, skb->cb, sizeof(info));
786
787 if (WARN_ON_ONCE(skb->len > IEEE80211_MAX_DATA_LEN + hdrlen))
788 return -1;
789
790 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU))
791 return -1;
792
793 if (info.control.vif) {
794 struct iwl_mvm_vif *mvmvif =
795 iwl_mvm_vif_from_mac80211(info.control.vif);
796 bool p2p_aux = iwl_mvm_has_p2p_over_aux(mvm);
797
798 if ((info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE &&
799 p2p_aux) ||
800 (info.control.vif->type == NL80211_IFTYPE_STATION &&
801 offchannel)) {
802 /*
803 * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets
804 * that can be used in 2 different types of vifs, P2P
805 * Device and STATION.
806 * P2P Device uses the offchannel queue.
807 * STATION (HS2.0) uses the auxiliary context of the FW,
808 * and hence needs to be sent on the aux queue.
809 * If P2P_DEV_OVER_AUX is supported (p2p_aux = true)
810 * also P2P Device uses the aux queue.
811 */
812 sta_id = mvm->aux_sta.sta_id;
813 queue = mvm->aux_queue;
814 if (WARN_ON(queue == IWL_MVM_INVALID_QUEUE))
815 return -1;
816 } else if (info.control.vif->type ==
817 NL80211_IFTYPE_P2P_DEVICE ||
818 info.control.vif->type == NL80211_IFTYPE_AP ||
819 info.control.vif->type == NL80211_IFTYPE_ADHOC) {
820 u32 link_id = u32_get_bits(info.control.flags,
821 IEEE80211_TX_CTRL_MLO_LINK);
822 struct iwl_mvm_vif_link_info *link;
823
824 if (link_id == IEEE80211_LINK_UNSPECIFIED) {
825 if (info.control.vif->active_links)
826 link_id = ffs(info.control.vif->active_links) - 1;
827 else
828 link_id = 0;
829 }
830
831 link = mvmvif->link[link_id];
832 if (WARN_ON(!link))
833 return -1;
834
835 if (!ieee80211_is_data(hdr->frame_control))
836 sta_id = link->bcast_sta.sta_id;
837 else
838 sta_id = link->mcast_sta.sta_id;
839
840 queue = iwl_mvm_get_ctrl_vif_queue(mvm, link, &info,
841 skb);
842 } else if (info.control.vif->type == NL80211_IFTYPE_MONITOR) {
843 queue = mvm->snif_queue;
844 sta_id = mvm->snif_sta.sta_id;
845 }
846 }
847
848 if (queue < 0) {
849 IWL_ERR(mvm, "No queue was found. Dropping TX\n");
850 return -1;
851 }
852
853 if (unlikely(ieee80211_is_probe_resp(fc)))
854 iwl_mvm_probe_resp_set_noa(mvm, skb);
855
856 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue);
857
858 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id,
859 NULL);
860 if (!dev_cmd)
861 return -1;
862
863 /* From now on, we cannot access info->control */
864 iwl_mvm_skb_prepare_status(skb, dev_cmd);
865
866 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) {
867 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
868 return -1;
869 }
870
871 return 0;
872 }
873
iwl_mvm_max_amsdu_size(struct iwl_mvm * mvm,struct ieee80211_sta * sta,unsigned int tid)874 unsigned int iwl_mvm_max_amsdu_size(struct iwl_mvm *mvm,
875 struct ieee80211_sta *sta, unsigned int tid)
876 {
877 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
878 u8 ac = tid_to_mac80211_ac[tid];
879 enum nl80211_band band;
880 unsigned int txf;
881 unsigned int val;
882 int lmac;
883
884 /* For HE redirect to trigger based fifos */
885 if (sta->deflink.he_cap.has_he && !WARN_ON(!iwl_mvm_has_new_tx_api(mvm)))
886 ac += 4;
887
888 txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac);
889
890 /*
891 * Don't send an AMSDU that will be longer than the TXF.
892 * Add a security margin of 256 for the TX command + headers.
893 * We also want to have the start of the next packet inside the
894 * fifo to be able to send bursts.
895 */
896 val = mvmsta->max_amsdu_len;
897
898 if (hweight16(sta->valid_links) <= 1) {
899 if (sta->valid_links) {
900 struct ieee80211_bss_conf *link_conf;
901 unsigned int link = ffs(sta->valid_links) - 1;
902
903 rcu_read_lock();
904 link_conf = rcu_dereference(mvmsta->vif->link_conf[link]);
905 if (WARN_ON(!link_conf))
906 band = NL80211_BAND_2GHZ;
907 else
908 band = link_conf->chanreq.oper.chan->band;
909 rcu_read_unlock();
910 } else {
911 band = mvmsta->vif->bss_conf.chanreq.oper.chan->band;
912 }
913
914 lmac = iwl_mvm_get_lmac_id(mvm, band);
915 } else if (fw_has_capa(&mvm->fw->ucode_capa,
916 IWL_UCODE_TLV_CAPA_CDB_SUPPORT)) {
917 /* for real MLO restrict to both LMACs if they exist */
918 lmac = IWL_LMAC_5G_INDEX;
919 val = min_t(unsigned int, val,
920 mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256);
921 lmac = IWL_LMAC_24G_INDEX;
922 } else {
923 lmac = IWL_LMAC_24G_INDEX;
924 }
925
926 return min_t(unsigned int, val,
927 mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256);
928 }
929
930 #ifdef CONFIG_INET
931
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)932 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
933 struct ieee80211_tx_info *info,
934 struct ieee80211_sta *sta,
935 struct sk_buff_head *mpdus_skb)
936 {
937 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
938 struct ieee80211_hdr *hdr = (void *)skb->data;
939 unsigned int mss = skb_shinfo(skb)->gso_size;
940 unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len;
941 u16 snap_ip_tcp, pad;
942 netdev_features_t netdev_flags = NETIF_F_CSUM_MASK | NETIF_F_SG;
943 u8 tid;
944
945 snap_ip_tcp = 8 + skb_network_header_len(skb) + tcp_hdrlen(skb);
946
947 if (!mvmsta->max_amsdu_len ||
948 !ieee80211_is_data_qos(hdr->frame_control) ||
949 !mvmsta->amsdu_enabled)
950 return iwl_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
951
952 /*
953 * Do not build AMSDU for IPv6 with extension headers.
954 * ask stack to segment and checkum the generated MPDUs for us.
955 */
956 if (skb->protocol == htons(ETH_P_IPV6) &&
957 ((struct ipv6hdr *)skb_network_header(skb))->nexthdr !=
958 IPPROTO_TCP) {
959 netdev_flags &= ~NETIF_F_CSUM_MASK;
960 return iwl_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
961 }
962
963 tid = ieee80211_get_tid(hdr);
964 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
965 return -EINVAL;
966
967 /*
968 * No need to lock amsdu_in_ampdu_allowed since it can't be modified
969 * during an BA session.
970 */
971 if ((info->flags & IEEE80211_TX_CTL_AMPDU &&
972 !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) ||
973 !(mvmsta->amsdu_enabled & BIT(tid)))
974 return iwl_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
975
976 /*
977 * Take the min of ieee80211 station and mvm station
978 */
979 max_amsdu_len =
980 min_t(unsigned int, sta->cur->max_amsdu_len,
981 iwl_mvm_max_amsdu_size(mvm, sta, tid));
982
983 /*
984 * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not
985 * supported. This is a spec requirement (IEEE 802.11-2015
986 * section 8.7.3 NOTE 3).
987 */
988 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
989 !sta->deflink.vht_cap.vht_supported)
990 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095);
991
992 /* Sub frame header + SNAP + IP header + TCP header + MSS */
993 subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss;
994 pad = (4 - subf_len) & 0x3;
995
996 /*
997 * If we have N subframes in the A-MSDU, then the A-MSDU's size is
998 * N * subf_len + (N - 1) * pad.
999 */
1000 num_subframes = (max_amsdu_len + pad) / (subf_len + pad);
1001
1002 if (sta->max_amsdu_subframes &&
1003 num_subframes > sta->max_amsdu_subframes)
1004 num_subframes = sta->max_amsdu_subframes;
1005
1006 tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
1007 tcp_hdrlen(skb) + skb->data_len;
1008
1009 /*
1010 * Make sure we have enough TBs for the A-MSDU:
1011 * 2 for each subframe
1012 * 1 more for each fragment
1013 * 1 more for the potential data in the header
1014 */
1015 if ((num_subframes * 2 + skb_shinfo(skb)->nr_frags + 1) >
1016 mvm->trans->info.max_skb_frags)
1017 num_subframes = 1;
1018
1019 if (num_subframes > 1)
1020 *ieee80211_get_qos_ctl(hdr) |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
1021
1022 /* This skb fits in one single A-MSDU */
1023 if (num_subframes * mss >= tcp_payload_len) {
1024 __skb_queue_tail(mpdus_skb, skb);
1025 return 0;
1026 }
1027
1028 /*
1029 * Trick the segmentation function to make it
1030 * create SKBs that can fit into one A-MSDU.
1031 */
1032 return iwl_tx_tso_segment(skb, num_subframes, netdev_flags, mpdus_skb);
1033 }
1034 #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)1035 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
1036 struct ieee80211_tx_info *info,
1037 struct ieee80211_sta *sta,
1038 struct sk_buff_head *mpdus_skb)
1039 {
1040 /* Impossible to get TSO with CONFIG_INET */
1041 WARN_ON(1);
1042
1043 return -1;
1044 }
1045 #endif
1046
1047 /* 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)1048 static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id)
1049 {
1050 unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap;
1051 unsigned long now = jiffies;
1052 int tid;
1053
1054 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1055 return false;
1056
1057 for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) {
1058 if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] +
1059 IWL_MVM_DQA_QUEUE_TIMEOUT, now))
1060 return true;
1061 }
1062
1063 return false;
1064 }
1065
iwl_mvm_tx_airtime(struct iwl_mvm * mvm,struct iwl_mvm_sta * mvmsta,int airtime)1066 static void iwl_mvm_tx_airtime(struct iwl_mvm *mvm,
1067 struct iwl_mvm_sta *mvmsta,
1068 int airtime)
1069 {
1070 int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
1071 struct iwl_mvm_tcm_mac *mdata;
1072
1073 if (mac >= NUM_MAC_INDEX_DRIVER)
1074 return;
1075
1076 mdata = &mvm->tcm.data[mac];
1077
1078 if (mvm->tcm.paused)
1079 return;
1080
1081 if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD))
1082 schedule_delayed_work(&mvm->tcm.work, 0);
1083
1084 mdata->tx.airtime += airtime;
1085 }
1086
iwl_mvm_tx_pkt_queued(struct iwl_mvm * mvm,struct iwl_mvm_sta * mvmsta,int tid)1087 static int iwl_mvm_tx_pkt_queued(struct iwl_mvm *mvm,
1088 struct iwl_mvm_sta *mvmsta, int tid)
1089 {
1090 u32 ac = tid_to_mac80211_ac[tid];
1091 int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
1092 struct iwl_mvm_tcm_mac *mdata;
1093
1094 if (mac >= NUM_MAC_INDEX_DRIVER)
1095 return -EINVAL;
1096
1097 mdata = &mvm->tcm.data[mac];
1098
1099 mdata->tx.pkts[ac]++;
1100
1101 return 0;
1102 }
1103
1104 /*
1105 * Sets the fields in the Tx cmd that are crypto related.
1106 *
1107 * This function must be called with BHs disabled.
1108 */
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)1109 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb,
1110 struct ieee80211_tx_info *info,
1111 struct ieee80211_sta *sta,
1112 const u8 *addr3_override)
1113 {
1114 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1115 struct iwl_mvm_sta *mvmsta;
1116 struct iwl_device_tx_cmd *dev_cmd;
1117 __le16 fc;
1118 u16 seq_number = 0;
1119 u8 tid = IWL_MAX_TID_COUNT;
1120 u16 txq_id;
1121 bool is_ampdu = false;
1122 int hdrlen;
1123
1124 if (WARN_ON_ONCE(!sta))
1125 return -1;
1126
1127 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1128 fc = hdr->frame_control;
1129 hdrlen = ieee80211_hdrlen(fc);
1130
1131 if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc))
1132 return -1;
1133
1134 if (WARN_ON_ONCE(mvmsta->deflink.sta_id == IWL_INVALID_STA))
1135 return -1;
1136
1137 if (unlikely(ieee80211_is_any_nullfunc(fc)) && sta->deflink.he_cap.has_he)
1138 return -1;
1139
1140 if (unlikely(ieee80211_is_probe_resp(fc)))
1141 iwl_mvm_probe_resp_set_noa(mvm, skb);
1142
1143 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen,
1144 sta, mvmsta->deflink.sta_id,
1145 addr3_override);
1146 if (!dev_cmd)
1147 goto drop;
1148
1149 /*
1150 * we handle that entirely ourselves -- for uAPSD the firmware
1151 * will always send a notification, and for PS-Poll responses
1152 * we'll notify mac80211 when getting frame status
1153 */
1154 info->flags &= ~IEEE80211_TX_STATUS_EOSP;
1155
1156 spin_lock(&mvmsta->lock);
1157
1158 /* nullfunc frames should go to the MGMT queue regardless of QOS,
1159 * the conditions of !ieee80211_is_qos_nullfunc(fc) and
1160 * !ieee80211_is_data_qos(fc) keep the default assignment of MGMT TID
1161 */
1162 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
1163 tid = ieee80211_get_tid(hdr);
1164 if (WARN_ONCE(tid >= IWL_MAX_TID_COUNT, "Invalid TID %d", tid))
1165 goto drop_unlock_sta;
1166
1167 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU;
1168 if (WARN_ONCE(is_ampdu &&
1169 mvmsta->tid_data[tid].state != IWL_AGG_ON,
1170 "Invalid internal agg state %d for TID %d",
1171 mvmsta->tid_data[tid].state, tid))
1172 goto drop_unlock_sta;
1173
1174 seq_number = mvmsta->tid_data[tid].seq_number;
1175 seq_number &= IEEE80211_SCTL_SEQ;
1176
1177 if (!iwl_mvm_has_new_tx_api(mvm)) {
1178 struct iwl_tx_cmd_v6 *tx_cmd = (void *)dev_cmd->payload;
1179
1180 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
1181 hdr->seq_ctrl |= cpu_to_le16(seq_number);
1182 /* update the tx_cmd hdr as it was already copied */
1183 tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl;
1184 }
1185 } else if (ieee80211_is_data(fc) && !ieee80211_is_data_qos(fc) &&
1186 !ieee80211_is_nullfunc(fc)) {
1187 tid = IWL_TID_NON_QOS;
1188 }
1189
1190 txq_id = mvmsta->tid_data[tid].txq_id;
1191
1192 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
1193
1194 if (WARN_ONCE(txq_id == IWL_MVM_INVALID_QUEUE, "Invalid TXQ id")) {
1195 #if defined(__FreeBSD__)
1196 printf("%s:%d: fc %#06x tid %u txq_id %u mvm %p "
1197 "skb %p { len %u } info %p sta %p (see PR 274382)\n",
1198 __func__, __LINE__,
1199 fc, tid, txq_id, mvm, skb, skb->len, info, sta);
1200 #endif
1201 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1202 spin_unlock(&mvmsta->lock);
1203 return -1;
1204 }
1205
1206 if (!iwl_mvm_has_new_tx_api(mvm)) {
1207 /* Keep track of the time of the last frame for this RA/TID */
1208 mvm->queue_info[txq_id].last_frame_time[tid] = jiffies;
1209
1210 /*
1211 * If we have timed-out TIDs - schedule the worker that will
1212 * reconfig the queues and update them
1213 *
1214 * Note that the no lock is taken here in order to not serialize
1215 * the TX flow. This isn't dangerous because scheduling
1216 * mvm->add_stream_wk can't ruin the state, and if we DON'T
1217 * schedule it due to some race condition then next TX we get
1218 * here we will.
1219 */
1220 if (unlikely(mvm->queue_info[txq_id].status ==
1221 IWL_MVM_QUEUE_SHARED &&
1222 iwl_mvm_txq_should_update(mvm, txq_id)))
1223 schedule_work(&mvm->add_stream_wk);
1224 }
1225
1226 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x len %d\n",
1227 mvmsta->deflink.sta_id, tid, txq_id,
1228 IEEE80211_SEQ_TO_SN(seq_number), skb->len);
1229
1230 /* From now on, we cannot access info->control */
1231 iwl_mvm_skb_prepare_status(skb, dev_cmd);
1232
1233 /*
1234 * The IV is introduced by the HW for new tx api, and it is not present
1235 * in the skb, hence, don't tell iwl_mvm_mei_tx_copy_to_csme about the
1236 * IV for those devices.
1237 */
1238 if (ieee80211_is_data(fc))
1239 iwl_mvm_mei_tx_copy_to_csme(mvm, skb,
1240 info->control.hw_key &&
1241 !iwl_mvm_has_new_tx_api(mvm) ?
1242 info->control.hw_key->iv_len : 0);
1243
1244 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id))
1245 goto drop_unlock_sta;
1246
1247 if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc))
1248 mvmsta->tid_data[tid].seq_number = seq_number + 0x10;
1249
1250 spin_unlock(&mvmsta->lock);
1251
1252 if (iwl_mvm_tx_pkt_queued(mvm, mvmsta,
1253 tid == IWL_MAX_TID_COUNT ? 0 : tid))
1254 goto drop;
1255
1256 return 0;
1257
1258 drop_unlock_sta:
1259 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1260 spin_unlock(&mvmsta->lock);
1261 drop:
1262 IWL_DEBUG_TX(mvm, "TX to [%d|%d] dropped\n", mvmsta->deflink.sta_id,
1263 tid);
1264 return -1;
1265 }
1266
iwl_mvm_tx_skb_sta(struct iwl_mvm * mvm,struct sk_buff * skb,struct ieee80211_sta * sta)1267 int iwl_mvm_tx_skb_sta(struct iwl_mvm *mvm, struct sk_buff *skb,
1268 struct ieee80211_sta *sta)
1269 {
1270 struct iwl_mvm_sta *mvmsta;
1271 struct ieee80211_tx_info info;
1272 struct sk_buff_head mpdus_skbs;
1273 struct ieee80211_vif *vif;
1274 unsigned int payload_len;
1275 int ret;
1276 struct sk_buff *orig_skb = skb;
1277 const u8 *addr3;
1278
1279 if (WARN_ON_ONCE(!sta))
1280 return -1;
1281
1282 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1283
1284 if (WARN_ON_ONCE(mvmsta->deflink.sta_id == IWL_INVALID_STA))
1285 return -1;
1286
1287 memcpy(&info, skb->cb, sizeof(info));
1288
1289 if (!skb_is_gso(skb))
1290 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta, NULL);
1291
1292 payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
1293 tcp_hdrlen(skb) + skb->data_len;
1294
1295 if (payload_len <= skb_shinfo(skb)->gso_size)
1296 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta, NULL);
1297
1298 __skb_queue_head_init(&mpdus_skbs);
1299
1300 vif = info.control.vif;
1301 if (!vif)
1302 return -1;
1303
1304 ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs);
1305 if (ret)
1306 return ret;
1307
1308 WARN_ON(skb_queue_empty(&mpdus_skbs));
1309
1310 /*
1311 * As described in IEEE sta 802.11-2020, table 9-30 (Address
1312 * field contents), A-MSDU address 3 should contain the BSSID
1313 * address.
1314 * Pass address 3 down to iwl_mvm_tx_mpdu() and further to set it
1315 * in the command header. We need to preserve the original
1316 * address 3 in the skb header to correctly create all the
1317 * A-MSDU subframe headers from it.
1318 */
1319 switch (vif->type) {
1320 case NL80211_IFTYPE_STATION:
1321 addr3 = vif->cfg.ap_addr;
1322 break;
1323 case NL80211_IFTYPE_AP:
1324 addr3 = vif->addr;
1325 break;
1326 default:
1327 addr3 = NULL;
1328 break;
1329 }
1330
1331 while (!skb_queue_empty(&mpdus_skbs)) {
1332 struct ieee80211_hdr *hdr;
1333 bool amsdu;
1334
1335 skb = __skb_dequeue(&mpdus_skbs);
1336 hdr = (void *)skb->data;
1337 amsdu = ieee80211_is_data_qos(hdr->frame_control) &&
1338 (*ieee80211_get_qos_ctl(hdr) &
1339 IEEE80211_QOS_CTL_A_MSDU_PRESENT);
1340
1341 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta,
1342 amsdu ? addr3 : NULL);
1343 if (ret) {
1344 /* Free skbs created as part of TSO logic that have not yet been dequeued */
1345 __skb_queue_purge(&mpdus_skbs);
1346 /* skb here is not necessarily same as skb that entered this method,
1347 * so free it explicitly.
1348 */
1349 if (skb == orig_skb)
1350 ieee80211_free_txskb(mvm->hw, skb);
1351 else
1352 kfree_skb(skb);
1353 /* there was error, but we consumed skb one way or another, so return 0 */
1354 return 0;
1355 }
1356 }
1357
1358 return 0;
1359 }
1360
iwl_mvm_check_ratid_empty(struct iwl_mvm * mvm,struct ieee80211_sta * sta,u8 tid)1361 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm,
1362 struct ieee80211_sta *sta, u8 tid)
1363 {
1364 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1365 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1366 struct ieee80211_vif *vif = mvmsta->vif;
1367 u16 normalized_ssn;
1368
1369 lockdep_assert_held(&mvmsta->lock);
1370
1371 if (tid_data->state == IWL_AGG_ON &&
1372 iwl_mvm_tid_queued(mvm, tid_data) == 0) {
1373 /*
1374 * Now that this aggregation or DQA queue is empty tell
1375 * mac80211 so it knows we no longer have frames buffered for
1376 * the station on this TID (for the TIM bitmap calculation.)
1377 */
1378 ieee80211_sta_set_buffered(sta, tid, false);
1379 }
1380
1381 /*
1382 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
1383 * to align the wrap around of ssn so we compare relevant values.
1384 */
1385 normalized_ssn = tid_data->ssn;
1386 if (mvm->trans->mac_cfg->gen2)
1387 normalized_ssn &= 0xff;
1388
1389 if (normalized_ssn != tid_data->next_reclaimed)
1390 return;
1391
1392 switch (tid_data->state) {
1393 case IWL_EMPTYING_HW_QUEUE_ADDBA:
1394 IWL_DEBUG_TX_QUEUES(mvm,
1395 "Can continue addBA flow ssn = next_recl = %d\n",
1396 tid_data->next_reclaimed);
1397 tid_data->state = IWL_AGG_STARTING;
1398 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1399 break;
1400 default:
1401 break;
1402 }
1403 }
1404
1405 #ifdef CONFIG_IWLWIFI_DEBUG
iwl_mvm_get_tx_fail_reason(u32 status)1406 const char *iwl_mvm_get_tx_fail_reason(u32 status)
1407 {
1408 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
1409 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
1410
1411 switch (status & TX_STATUS_MSK) {
1412 case TX_STATUS_SUCCESS:
1413 return "SUCCESS";
1414 TX_STATUS_POSTPONE(DELAY);
1415 TX_STATUS_POSTPONE(FEW_BYTES);
1416 TX_STATUS_POSTPONE(BT_PRIO);
1417 TX_STATUS_POSTPONE(QUIET_PERIOD);
1418 TX_STATUS_POSTPONE(CALC_TTAK);
1419 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
1420 TX_STATUS_FAIL(SHORT_LIMIT);
1421 TX_STATUS_FAIL(LONG_LIMIT);
1422 TX_STATUS_FAIL(UNDERRUN);
1423 TX_STATUS_FAIL(DRAIN_FLOW);
1424 TX_STATUS_FAIL(RFKILL_FLUSH);
1425 TX_STATUS_FAIL(LIFE_EXPIRE);
1426 TX_STATUS_FAIL(DEST_PS);
1427 TX_STATUS_FAIL(HOST_ABORTED);
1428 TX_STATUS_FAIL(BT_RETRY);
1429 TX_STATUS_FAIL(STA_INVALID);
1430 TX_STATUS_FAIL(FRAG_DROPPED);
1431 TX_STATUS_FAIL(TID_DISABLE);
1432 TX_STATUS_FAIL(FIFO_FLUSHED);
1433 TX_STATUS_FAIL(SMALL_CF_POLL);
1434 TX_STATUS_FAIL(FW_DROP);
1435 TX_STATUS_FAIL(STA_COLOR_MISMATCH);
1436 }
1437
1438 return "UNKNOWN";
1439
1440 #undef TX_STATUS_FAIL
1441 #undef TX_STATUS_POSTPONE
1442 }
1443 #endif /* CONFIG_IWLWIFI_DEBUG */
1444
iwl_mvm_get_hwrate_chan_width(u32 chan_width)1445 static int iwl_mvm_get_hwrate_chan_width(u32 chan_width)
1446 {
1447 switch (chan_width) {
1448 case RATE_MCS_CHAN_WIDTH_20:
1449 return 0;
1450 case RATE_MCS_CHAN_WIDTH_40:
1451 return IEEE80211_TX_RC_40_MHZ_WIDTH;
1452 case RATE_MCS_CHAN_WIDTH_80:
1453 return IEEE80211_TX_RC_80_MHZ_WIDTH;
1454 case RATE_MCS_CHAN_WIDTH_160:
1455 return IEEE80211_TX_RC_160_MHZ_WIDTH;
1456 default:
1457 return 0;
1458 }
1459 }
1460
iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags,enum nl80211_band band,struct ieee80211_tx_rate * r)1461 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags,
1462 enum nl80211_band band,
1463 struct ieee80211_tx_rate *r)
1464 {
1465 u32 format = rate_n_flags & RATE_MCS_MOD_TYPE_MSK;
1466 u32 rate = format == RATE_MCS_MOD_TYPE_HT ?
1467 RATE_HT_MCS_INDEX(rate_n_flags) :
1468 rate_n_flags & RATE_MCS_CODE_MSK;
1469
1470 r->flags |=
1471 iwl_mvm_get_hwrate_chan_width(rate_n_flags &
1472 RATE_MCS_CHAN_WIDTH_MSK);
1473
1474 if (rate_n_flags & RATE_MCS_SGI_MSK)
1475 r->flags |= IEEE80211_TX_RC_SHORT_GI;
1476 switch (format) {
1477 case RATE_MCS_MOD_TYPE_HT:
1478 r->flags |= IEEE80211_TX_RC_MCS;
1479 r->idx = rate;
1480 break;
1481 case RATE_MCS_MOD_TYPE_VHT:
1482 ieee80211_rate_set_vht(r, rate,
1483 FIELD_GET(RATE_MCS_NSS_MSK,
1484 rate_n_flags) + 1);
1485 r->flags |= IEEE80211_TX_RC_VHT_MCS;
1486 break;
1487 case RATE_MCS_MOD_TYPE_HE:
1488 case RATE_MCS_MOD_TYPE_EHT:
1489 /* mac80211 cannot do this without ieee80211_tx_status_ext()
1490 * but it only matters for radiotap */
1491 r->idx = 0;
1492 break;
1493 default:
1494 r->idx = iwl_mvm_legacy_hw_idx_to_mac80211_idx(rate_n_flags,
1495 band);
1496 }
1497 }
1498
1499 /*
1500 * translate ucode response to mac80211 tx status control values
1501 */
iwl_mvm_hwrate_to_tx_status(struct iwl_mvm * mvm,__le32 rate_n_flags,struct ieee80211_tx_info * info)1502 static void iwl_mvm_hwrate_to_tx_status(struct iwl_mvm *mvm,
1503 __le32 rate_n_flags,
1504 struct ieee80211_tx_info *info)
1505 {
1506 struct ieee80211_tx_rate *r = &info->status.rates[0];
1507 u32 rate;
1508
1509 /*
1510 * Technically this conversion is incorrect for BA status, however:
1511 * - we only use the BA notif data for older firmware that have
1512 * host rate scaling and don't use newer rate formats
1513 * - the firmware API changed together for BA notif and TX CMD
1514 * as well
1515 */
1516 rate = iwl_mvm_v3_rate_from_fw(rate_n_flags, mvm->fw_rates_ver);
1517
1518 info->status.antenna =
1519 ((rate & RATE_MCS_ANT_AB_MSK) >> RATE_MCS_ANT_POS);
1520 iwl_mvm_hwrate_to_tx_rate(rate, info->band, r);
1521 }
1522
iwl_mvm_tx_status_check_trigger(struct iwl_mvm * mvm,u32 status,__le16 frame_control)1523 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm,
1524 u32 status, __le16 frame_control)
1525 {
1526 struct iwl_fw_dbg_trigger_tlv *trig;
1527 struct iwl_fw_dbg_trigger_tx_status *status_trig;
1528 int i;
1529
1530 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS) {
1531 enum iwl_fw_ini_time_point tp =
1532 IWL_FW_INI_TIME_POINT_TX_FAILED;
1533
1534 if (ieee80211_is_action(frame_control))
1535 tp = IWL_FW_INI_TIME_POINT_TX_WFD_ACTION_FRAME_FAILED;
1536
1537 iwl_dbg_tlv_time_point(&mvm->fwrt,
1538 tp, NULL);
1539 return;
1540 }
1541
1542 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL,
1543 FW_DBG_TRIGGER_TX_STATUS);
1544 if (!trig)
1545 return;
1546
1547 status_trig = (void *)trig->data;
1548
1549 for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) {
1550 /* don't collect on status 0 */
1551 if (!status_trig->statuses[i].status)
1552 break;
1553
1554 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK))
1555 continue;
1556
1557 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
1558 "Tx status %d was received",
1559 status & TX_STATUS_MSK);
1560 break;
1561 }
1562 }
1563
1564 /*
1565 * iwl_mvm_get_scd_ssn - returns the SSN of the SCD
1566 * @tx_resp: the Tx response from the fw (agg or non-agg)
1567 *
1568 * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since
1569 * it can't know that everything will go well until the end of the AMPDU, it
1570 * can't know in advance the number of MPDUs that will be sent in the current
1571 * batch. This is why it writes the agg Tx response while it fetches the MPDUs.
1572 * Hence, it can't know in advance what the SSN of the SCD will be at the end
1573 * of the batch. This is why the SSN of the SCD is written at the end of the
1574 * whole struct at a variable offset. This function knows how to cope with the
1575 * variable offset and returns the SSN of the SCD.
1576 *
1577 * For 22000-series and lower, this is just 12 bits. For later, 16 bits.
1578 */
iwl_mvm_get_scd_ssn(struct iwl_mvm * mvm,struct iwl_tx_resp * tx_resp)1579 static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm,
1580 struct iwl_tx_resp *tx_resp)
1581 {
1582 u32 val = le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) +
1583 tx_resp->frame_count);
1584
1585 if (mvm->trans->mac_cfg->device_family >= IWL_DEVICE_FAMILY_AX210)
1586 return val & 0xFFFF;
1587 return val & 0xFFF;
1588 }
1589
iwl_mvm_rx_tx_cmd_single(struct iwl_mvm * mvm,struct iwl_rx_packet * pkt)1590 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm,
1591 struct iwl_rx_packet *pkt)
1592 {
1593 struct ieee80211_sta *sta;
1594 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1595 int txq_id = SEQ_TO_QUEUE(sequence);
1596 /* struct iwl_tx_resp_v3 is almost the same */
1597 struct iwl_tx_resp *tx_resp = (void *)pkt->data;
1598 int sta_id = IWL_TX_RES_GET_RA(tx_resp->ra_tid);
1599 int tid = IWL_TX_RES_GET_TID(tx_resp->ra_tid);
1600 struct agg_tx_status *agg_status =
1601 iwl_mvm_get_agg_status(mvm, tx_resp);
1602 u32 status = le16_to_cpu(agg_status->status);
1603 u16 ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp);
1604 struct sk_buff_head skbs;
1605 u8 skb_freed = 0;
1606 u8 lq_color;
1607 u16 next_reclaimed, seq_ctl;
1608 bool is_ndp = false;
1609
1610 __skb_queue_head_init(&skbs);
1611
1612 if (iwl_mvm_has_new_tx_api(mvm))
1613 txq_id = le16_to_cpu(tx_resp->tx_queue);
1614
1615 seq_ctl = le16_to_cpu(tx_resp->seq_ctl);
1616
1617 /* we can free until ssn % q.n_bd not inclusive */
1618 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs, false);
1619
1620 while (!skb_queue_empty(&skbs)) {
1621 struct sk_buff *skb = __skb_dequeue(&skbs);
1622 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1623 struct ieee80211_hdr *hdr = (void *)skb->data;
1624 bool flushed = false;
1625
1626 skb_freed++;
1627
1628 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1629
1630 memset(&info->status, 0, sizeof(info->status));
1631 info->flags &= ~(IEEE80211_TX_STAT_ACK | IEEE80211_TX_STAT_TX_FILTERED);
1632
1633 /* inform mac80211 about what happened with the frame */
1634 switch (status & TX_STATUS_MSK) {
1635 case TX_STATUS_SUCCESS:
1636 case TX_STATUS_DIRECT_DONE:
1637 info->flags |= IEEE80211_TX_STAT_ACK;
1638 break;
1639 case TX_STATUS_FAIL_FIFO_FLUSHED:
1640 case TX_STATUS_FAIL_DRAIN_FLOW:
1641 flushed = true;
1642 break;
1643 case TX_STATUS_FAIL_DEST_PS:
1644 /* the FW should have stopped the queue and not
1645 * return this status
1646 */
1647 IWL_ERR_LIMIT(mvm,
1648 "FW reported TX filtered, status=0x%x, FC=0x%x\n",
1649 status, le16_to_cpu(hdr->frame_control));
1650 info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
1651 break;
1652 default:
1653 break;
1654 }
1655
1656 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS &&
1657 ieee80211_is_mgmt(hdr->frame_control))
1658 iwl_mvm_toggle_tx_ant(mvm, &mvm->mgmt_last_antenna_idx);
1659
1660 /*
1661 * If we are freeing multiple frames, mark all the frames
1662 * but the first one as acked, since they were acknowledged
1663 * before
1664 * */
1665 if (skb_freed > 1)
1666 info->flags |= IEEE80211_TX_STAT_ACK;
1667
1668 iwl_mvm_tx_status_check_trigger(mvm, status, hdr->frame_control);
1669
1670 info->status.rates[0].count = tx_resp->failure_frame + 1;
1671
1672 iwl_mvm_hwrate_to_tx_status(mvm, tx_resp->initial_rate, info);
1673
1674 /* Don't assign the converted initial_rate, because driver
1675 * TLC uses this and doesn't support the new FW rate
1676 */
1677 info->status.status_driver_data[1] =
1678 (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate);
1679
1680 /* Single frame failure in an AMPDU queue => send BAR */
1681 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
1682 !(info->flags & IEEE80211_TX_STAT_ACK) &&
1683 !(info->flags & IEEE80211_TX_STAT_TX_FILTERED) && !flushed)
1684 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1685 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1686
1687 /* W/A FW bug: seq_ctl is wrong upon failure / BAR frame */
1688 if (ieee80211_is_back_req(hdr->frame_control))
1689 seq_ctl = 0;
1690 else if (status != TX_STATUS_SUCCESS)
1691 seq_ctl = le16_to_cpu(hdr->seq_ctrl);
1692
1693 if (unlikely(!seq_ctl)) {
1694 /*
1695 * If it is an NDP, we can't update next_reclaim since
1696 * its sequence control is 0. Note that for that same
1697 * reason, NDPs are never sent to A-MPDU'able queues
1698 * so that we can never have more than one freed frame
1699 * for a single Tx resonse (see WARN_ON below).
1700 */
1701 if (ieee80211_is_qos_nullfunc(hdr->frame_control))
1702 is_ndp = true;
1703 }
1704
1705 /*
1706 * TODO: this is not accurate if we are freeing more than one
1707 * packet.
1708 */
1709 info->status.tx_time =
1710 le16_to_cpu(tx_resp->wireless_media_time);
1711 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1);
1712 lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info);
1713 info->status.status_driver_data[0] =
1714 RS_DRV_DATA_PACK(lq_color, tx_resp->reduced_tpc);
1715
1716 if (likely(!iwl_mvm_time_sync_frame(mvm, skb, hdr->addr1)))
1717 ieee80211_tx_status_skb(mvm->hw, skb);
1718 }
1719
1720 /* This is an aggregation queue or might become one, so we use
1721 * the ssn since: ssn = wifi seq_num % 256.
1722 * The seq_ctl is the sequence control of the packet to which
1723 * this Tx response relates. But if there is a hole in the
1724 * bitmap of the BA we received, this Tx response may allow to
1725 * reclaim the hole and all the subsequent packets that were
1726 * already acked. In that case, seq_ctl != ssn, and the next
1727 * packet to be reclaimed will be ssn and not seq_ctl. In that
1728 * case, several packets will be reclaimed even if
1729 * frame_count = 1.
1730 *
1731 * The ssn is the index (% 256) of the latest packet that has
1732 * treated (acked / dropped) + 1.
1733 */
1734 next_reclaimed = ssn;
1735
1736 IWL_DEBUG_TX_REPLY(mvm,
1737 "TXQ %d status %s (0x%08x)\n",
1738 txq_id, iwl_mvm_get_tx_fail_reason(status), status);
1739
1740 IWL_DEBUG_TX_REPLY(mvm,
1741 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
1742 le32_to_cpu(tx_resp->initial_rate),
1743 tx_resp->failure_frame, SEQ_TO_INDEX(sequence),
1744 ssn, next_reclaimed, seq_ctl);
1745
1746 rcu_read_lock();
1747
1748 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1749 /*
1750 * sta can't be NULL otherwise it'd mean that the sta has been freed in
1751 * the firmware while we still have packets for it in the Tx queues.
1752 */
1753 if (WARN_ON_ONCE(!sta))
1754 goto out;
1755
1756 if (!IS_ERR(sta)) {
1757 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1758
1759 iwl_mvm_tx_airtime(mvm, mvmsta,
1760 le16_to_cpu(tx_resp->wireless_media_time));
1761
1762 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS &&
1763 mvmsta->sta_state < IEEE80211_STA_AUTHORIZED)
1764 iwl_mvm_toggle_tx_ant(mvm, &mvmsta->tx_ant);
1765
1766 if (sta->wme && tid != IWL_MGMT_TID) {
1767 struct iwl_mvm_tid_data *tid_data =
1768 &mvmsta->tid_data[tid];
1769 bool send_eosp_ndp = false;
1770
1771 spin_lock_bh(&mvmsta->lock);
1772
1773 if (!is_ndp) {
1774 tid_data->next_reclaimed = next_reclaimed;
1775 IWL_DEBUG_TX_REPLY(mvm,
1776 "Next reclaimed packet:%d\n",
1777 next_reclaimed);
1778 if (tid < IWL_MAX_TID_COUNT)
1779 iwl_mvm_count_mpdu(mvmsta, sta_id, 1,
1780 true, 0);
1781 } else {
1782 IWL_DEBUG_TX_REPLY(mvm,
1783 "NDP - don't update next_reclaimed\n");
1784 }
1785
1786 iwl_mvm_check_ratid_empty(mvm, sta, tid);
1787
1788 if (mvmsta->sleep_tx_count) {
1789 mvmsta->sleep_tx_count--;
1790 if (mvmsta->sleep_tx_count &&
1791 !iwl_mvm_tid_queued(mvm, tid_data)) {
1792 /*
1793 * The number of frames in the queue
1794 * dropped to 0 even if we sent less
1795 * frames than we thought we had on the
1796 * Tx queue.
1797 * This means we had holes in the BA
1798 * window that we just filled, ask
1799 * mac80211 to send EOSP since the
1800 * firmware won't know how to do that.
1801 * Send NDP and the firmware will send
1802 * EOSP notification that will trigger
1803 * a call to ieee80211_sta_eosp().
1804 */
1805 send_eosp_ndp = true;
1806 }
1807 }
1808
1809 spin_unlock_bh(&mvmsta->lock);
1810 if (send_eosp_ndp) {
1811 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta,
1812 IEEE80211_FRAME_RELEASE_UAPSD,
1813 1, tid, false, false);
1814 mvmsta->sleep_tx_count = 0;
1815 ieee80211_send_eosp_nullfunc(sta, tid);
1816 }
1817 }
1818
1819 if (mvmsta->next_status_eosp) {
1820 mvmsta->next_status_eosp = false;
1821 ieee80211_sta_eosp(sta);
1822 }
1823 }
1824 out:
1825 rcu_read_unlock();
1826 }
1827
1828 #ifdef CONFIG_IWLWIFI_DEBUG
1829 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
iwl_get_agg_tx_status(u16 status)1830 static const char *iwl_get_agg_tx_status(u16 status)
1831 {
1832 switch (status & AGG_TX_STATE_STATUS_MSK) {
1833 AGG_TX_STATE_(TRANSMITTED);
1834 AGG_TX_STATE_(UNDERRUN);
1835 AGG_TX_STATE_(BT_PRIO);
1836 AGG_TX_STATE_(FEW_BYTES);
1837 AGG_TX_STATE_(ABORT);
1838 AGG_TX_STATE_(TX_ON_AIR_DROP);
1839 AGG_TX_STATE_(LAST_SENT_TRY_CNT);
1840 AGG_TX_STATE_(LAST_SENT_BT_KILL);
1841 AGG_TX_STATE_(SCD_QUERY);
1842 AGG_TX_STATE_(TEST_BAD_CRC32);
1843 AGG_TX_STATE_(RESPONSE);
1844 AGG_TX_STATE_(DUMP_TX);
1845 AGG_TX_STATE_(DELAY_TX);
1846 }
1847
1848 return "UNKNOWN";
1849 }
1850
iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm * mvm,struct iwl_rx_packet * pkt)1851 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1852 struct iwl_rx_packet *pkt)
1853 {
1854 struct iwl_tx_resp *tx_resp = (void *)pkt->data;
1855 struct agg_tx_status *frame_status =
1856 iwl_mvm_get_agg_status(mvm, tx_resp);
1857 int i;
1858 bool tirgger_timepoint = false;
1859
1860 for (i = 0; i < tx_resp->frame_count; i++) {
1861 u16 fstatus = le16_to_cpu(frame_status[i].status);
1862 /* In case one frame wasn't transmitted trigger time point */
1863 tirgger_timepoint |= ((fstatus & AGG_TX_STATE_STATUS_MSK) !=
1864 AGG_TX_STATE_TRANSMITTED);
1865 IWL_DEBUG_TX_REPLY(mvm,
1866 "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
1867 iwl_get_agg_tx_status(fstatus),
1868 fstatus & AGG_TX_STATE_STATUS_MSK,
1869 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >>
1870 AGG_TX_STATE_TRY_CNT_POS,
1871 le16_to_cpu(frame_status[i].sequence));
1872 }
1873
1874 if (tirgger_timepoint)
1875 iwl_dbg_tlv_time_point(&mvm->fwrt,
1876 IWL_FW_INI_TIME_POINT_TX_FAILED, NULL);
1877
1878 }
1879 #else
iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm * mvm,struct iwl_rx_packet * pkt)1880 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1881 struct iwl_rx_packet *pkt)
1882 {}
1883 #endif /* CONFIG_IWLWIFI_DEBUG */
1884
iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm * mvm,struct iwl_rx_packet * pkt)1885 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm,
1886 struct iwl_rx_packet *pkt)
1887 {
1888 struct iwl_tx_resp *tx_resp = (void *)pkt->data;
1889 int sta_id = IWL_TX_RES_GET_RA(tx_resp->ra_tid);
1890 int tid = IWL_TX_RES_GET_TID(tx_resp->ra_tid);
1891 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1892 struct iwl_mvm_sta *mvmsta;
1893 int queue = SEQ_TO_QUEUE(sequence);
1894 struct ieee80211_sta *sta;
1895
1896 if (WARN_ON_ONCE(queue < IWL_MVM_DQA_MIN_DATA_QUEUE &&
1897 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)))
1898 return;
1899
1900 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt);
1901
1902 rcu_read_lock();
1903
1904 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1905
1906 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1907 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta) || !sta->wme)) {
1908 rcu_read_unlock();
1909 return;
1910 }
1911
1912 if (!WARN_ON_ONCE(!mvmsta)) {
1913 mvmsta->tid_data[tid].rate_n_flags =
1914 tx_resp->initial_rate;
1915 mvmsta->tid_data[tid].tx_time =
1916 le16_to_cpu(tx_resp->wireless_media_time);
1917 mvmsta->tid_data[tid].lq_color =
1918 TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info);
1919 iwl_mvm_tx_airtime(mvm, mvmsta,
1920 le16_to_cpu(tx_resp->wireless_media_time));
1921 }
1922
1923 rcu_read_unlock();
1924 }
1925
iwl_mvm_rx_tx_cmd(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)1926 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1927 {
1928 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1929 struct iwl_tx_resp *tx_resp = (void *)pkt->data;
1930
1931 if (tx_resp->frame_count == 1)
1932 iwl_mvm_rx_tx_cmd_single(mvm, pkt);
1933 else
1934 iwl_mvm_rx_tx_cmd_agg(mvm, pkt);
1935 }
1936
iwl_mvm_tx_reclaim(struct iwl_mvm * mvm,int sta_id,int tid,int txq,int index,struct ieee80211_tx_info * tx_info,__le32 rate,bool is_flush)1937 static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid,
1938 int txq, int index,
1939 struct ieee80211_tx_info *tx_info, __le32 rate,
1940 bool is_flush)
1941 {
1942 struct sk_buff_head reclaimed_skbs;
1943 struct iwl_mvm_tid_data *tid_data = NULL;
1944 struct ieee80211_sta *sta;
1945 struct iwl_mvm_sta *mvmsta = NULL;
1946 struct sk_buff *skb;
1947 int freed;
1948
1949 if (WARN_ONCE(sta_id >= mvm->fw->ucode_capa.num_stations ||
1950 tid > IWL_MAX_TID_COUNT,
1951 "sta_id %d tid %d", sta_id, tid))
1952 return;
1953
1954 rcu_read_lock();
1955
1956 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1957
1958 /* Reclaiming frames for a station that has been deleted ? */
1959 if (WARN_ON_ONCE(!sta)) {
1960 rcu_read_unlock();
1961 return;
1962 }
1963
1964 __skb_queue_head_init(&reclaimed_skbs);
1965
1966 /*
1967 * Release all TFDs before the SSN, i.e. all TFDs in front of
1968 * block-ack window (we assume that they've been successfully
1969 * transmitted ... if not, it's too late anyway).
1970 */
1971 iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs, is_flush);
1972
1973 skb_queue_walk(&reclaimed_skbs, skb) {
1974 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1975
1976 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1977
1978 memset(&info->status, 0, sizeof(info->status));
1979 /* Packet was transmitted successfully, failures come as single
1980 * frames because before failing a frame the firmware transmits
1981 * it without aggregation at least once.
1982 */
1983 if (!is_flush)
1984 info->flags |= IEEE80211_TX_STAT_ACK;
1985 else
1986 info->flags &= ~IEEE80211_TX_STAT_ACK;
1987 }
1988
1989 /*
1990 * It's possible to get a BA response after invalidating the rcu (rcu is
1991 * invalidated in order to prevent new Tx from being sent, but there may
1992 * be some frames already in-flight).
1993 * In this case we just want to reclaim, and could skip all the
1994 * sta-dependent stuff since it's in the middle of being removed
1995 * anyways.
1996 */
1997 if (IS_ERR(sta))
1998 goto out;
1999
2000 mvmsta = iwl_mvm_sta_from_mac80211(sta);
2001 tid_data = &mvmsta->tid_data[tid];
2002
2003 if (tid_data->txq_id != txq) {
2004 IWL_ERR(mvm,
2005 "invalid reclaim request: Q %d, tid %d\n",
2006 tid_data->txq_id, tid);
2007 rcu_read_unlock();
2008 return;
2009 }
2010
2011 spin_lock_bh(&mvmsta->lock);
2012
2013 tid_data->next_reclaimed = index;
2014
2015 iwl_mvm_check_ratid_empty(mvm, sta, tid);
2016
2017 freed = 0;
2018
2019 /* pack lq color from tid_data along the reduced txp */
2020 tx_info->status.status_driver_data[0] =
2021 RS_DRV_DATA_PACK(tid_data->lq_color,
2022 tx_info->status.status_driver_data[0]);
2023 /* the value is only consumed for old FW that has v1 rates anyway */
2024 tx_info->status.status_driver_data[1] =
2025 (void *)(uintptr_t)le32_to_cpu(rate);
2026
2027 skb_queue_walk(&reclaimed_skbs, skb) {
2028 struct ieee80211_hdr *hdr = (void *)skb->data;
2029 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2030
2031 if (!is_flush) {
2032 if (ieee80211_is_data_qos(hdr->frame_control))
2033 freed++;
2034 else
2035 WARN_ON_ONCE(tid != IWL_MAX_TID_COUNT);
2036 }
2037
2038 /* this is the first skb we deliver in this batch */
2039 /* put the rate scaling data there */
2040 if (freed == 1) {
2041 info->flags |= IEEE80211_TX_STAT_AMPDU;
2042 memcpy(&info->status, &tx_info->status,
2043 sizeof(tx_info->status));
2044 iwl_mvm_hwrate_to_tx_status(mvm, rate, info);
2045 }
2046 }
2047
2048 spin_unlock_bh(&mvmsta->lock);
2049
2050 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is
2051 * possible (i.e. first MPDU in the aggregation wasn't acked)
2052 * Still it's important to update RS about sent vs. acked.
2053 */
2054 if (!is_flush && skb_queue_empty(&reclaimed_skbs) &&
2055 !iwl_mvm_has_tlc_offload(mvm)) {
2056 struct ieee80211_chanctx_conf *chanctx_conf = NULL;
2057
2058 /* no TLC offload, so non-MLD mode */
2059 if (mvmsta->vif)
2060 chanctx_conf =
2061 rcu_dereference(mvmsta->vif->bss_conf.chanctx_conf);
2062
2063 if (WARN_ON_ONCE(!chanctx_conf))
2064 goto out;
2065
2066 tx_info->band = chanctx_conf->def.chan->band;
2067 iwl_mvm_hwrate_to_tx_status(mvm, rate, tx_info);
2068
2069 IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n");
2070 iwl_mvm_rs_tx_status(mvm, sta, tid, tx_info, false);
2071 }
2072
2073 out:
2074 rcu_read_unlock();
2075
2076 while (!skb_queue_empty(&reclaimed_skbs)) {
2077 skb = __skb_dequeue(&reclaimed_skbs);
2078 ieee80211_tx_status_skb(mvm->hw, skb);
2079 }
2080 }
2081
iwl_mvm_rx_ba_notif(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)2082 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
2083 {
2084 struct iwl_rx_packet *pkt = rxb_addr(rxb);
2085 unsigned int pkt_len = iwl_rx_packet_payload_len(pkt);
2086 int sta_id, tid, txq, index;
2087 struct ieee80211_tx_info ba_info = {};
2088 struct iwl_mvm_ba_notif *ba_notif;
2089 struct iwl_mvm_tid_data *tid_data;
2090 struct iwl_mvm_sta *mvmsta;
2091
2092 ba_info.flags = IEEE80211_TX_STAT_AMPDU;
2093
2094 if (iwl_mvm_has_new_tx_api(mvm)) {
2095 struct iwl_compressed_ba_notif *ba_res =
2096 (void *)pkt->data;
2097 u8 lq_color = TX_RES_RATE_TABLE_COL_GET(ba_res->tlc_rate_info);
2098 u16 tfd_cnt;
2099 int i;
2100
2101 if (IWL_FW_CHECK(mvm, sizeof(*ba_res) > pkt_len,
2102 "short BA notification (%d)\n", pkt_len))
2103 return;
2104
2105 sta_id = ba_res->sta_id;
2106 ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done);
2107 ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed);
2108 ba_info.status.tx_time =
2109 (u16)le32_to_cpu(ba_res->wireless_time);
2110 ba_info.status.status_driver_data[0] =
2111 (void *)(uintptr_t)ba_res->reduced_txp;
2112
2113 tfd_cnt = le16_to_cpu(ba_res->tfd_cnt);
2114 if (!tfd_cnt)
2115 return;
2116
2117 if (IWL_FW_CHECK(mvm,
2118 struct_size(ba_res, tfd, tfd_cnt) > pkt_len,
2119 "short BA notification (tfds:%d, size:%d)\n",
2120 tfd_cnt, pkt_len))
2121 return;
2122
2123 IWL_DEBUG_TX_REPLY(mvm,
2124 "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n",
2125 sta_id, le32_to_cpu(ba_res->flags),
2126 le16_to_cpu(ba_res->txed),
2127 le16_to_cpu(ba_res->done));
2128
2129 rcu_read_lock();
2130
2131 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
2132 /*
2133 * It's possible to get a BA response after invalidating the rcu
2134 * (rcu is invalidated in order to prevent new Tx from being
2135 * sent, but there may be some frames already in-flight).
2136 * In this case we just want to reclaim, and could skip all the
2137 * sta-dependent stuff since it's in the middle of being removed
2138 * anyways.
2139 */
2140
2141 /* Free per TID */
2142 for (i = 0; i < tfd_cnt; i++) {
2143 struct iwl_compressed_ba_tfd *ba_tfd = &ba_res->tfd[i];
2144
2145 tid = ba_tfd->tid;
2146 if (tid == IWL_MGMT_TID)
2147 tid = IWL_MAX_TID_COUNT;
2148
2149 if (mvmsta)
2150 mvmsta->tid_data[i].lq_color = lq_color;
2151
2152 iwl_mvm_tx_reclaim(mvm, sta_id, tid,
2153 (int)(le16_to_cpu(ba_tfd->q_num)),
2154 le16_to_cpu(ba_tfd->tfd_index),
2155 &ba_info,
2156 ba_res->tx_rate, false);
2157 }
2158
2159 if (mvmsta) {
2160 iwl_mvm_tx_airtime(mvm, mvmsta,
2161 le32_to_cpu(ba_res->wireless_time));
2162
2163 iwl_mvm_count_mpdu(mvmsta, sta_id,
2164 le16_to_cpu(ba_res->txed), true, 0);
2165 }
2166 rcu_read_unlock();
2167 return;
2168 }
2169
2170 ba_notif = (void *)pkt->data;
2171 sta_id = ba_notif->sta_id;
2172 tid = ba_notif->tid;
2173 /* "flow" corresponds to Tx queue */
2174 txq = le16_to_cpu(ba_notif->scd_flow);
2175 /* "ssn" is start of block-ack Tx window, corresponds to index
2176 * (in Tx queue's circular buffer) of first TFD/frame in window */
2177 index = le16_to_cpu(ba_notif->scd_ssn);
2178
2179 rcu_read_lock();
2180 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
2181 if (IWL_FW_CHECK(mvm, !mvmsta,
2182 "invalid STA ID %d in BA notif\n",
2183 sta_id)) {
2184 rcu_read_unlock();
2185 return;
2186 }
2187
2188 tid_data = &mvmsta->tid_data[tid];
2189
2190 ba_info.status.ampdu_ack_len = ba_notif->txed_2_done;
2191 ba_info.status.ampdu_len = ba_notif->txed;
2192 ba_info.status.tx_time = tid_data->tx_time;
2193 ba_info.status.status_driver_data[0] =
2194 (void *)(uintptr_t)ba_notif->reduced_txp;
2195
2196 rcu_read_unlock();
2197
2198 IWL_DEBUG_TX_REPLY(mvm,
2199 "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
2200 ba_notif->sta_addr, ba_notif->sta_id);
2201
2202 IWL_DEBUG_TX_REPLY(mvm,
2203 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
2204 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl),
2205 le64_to_cpu(ba_notif->bitmap), txq, index,
2206 ba_notif->txed, ba_notif->txed_2_done);
2207
2208 IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n",
2209 ba_notif->reduced_txp);
2210
2211 iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info,
2212 tid_data->rate_n_flags, false);
2213 }
2214
2215 /*
2216 * Note that there are transports that buffer frames before they reach
2217 * the firmware. This means that after flush_tx_path is called, the
2218 * queue might not be empty. The race-free way to handle this is to:
2219 * 1) set the station as draining
2220 * 2) flush the Tx path
2221 * 3) wait for the transport queues to be empty
2222 */
iwl_mvm_flush_tx_path(struct iwl_mvm * mvm,u32 tfd_msk)2223 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk)
2224 {
2225 int ret;
2226 struct iwl_tx_path_flush_cmd_v1 flush_cmd = {
2227 .queues_ctl = cpu_to_le32(tfd_msk),
2228 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH),
2229 };
2230
2231 WARN_ON(iwl_mvm_has_new_tx_api(mvm));
2232 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, 0,
2233 sizeof(flush_cmd), &flush_cmd);
2234 if (ret)
2235 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
2236 return ret;
2237 }
2238
iwl_mvm_flush_sta_tids(struct iwl_mvm * mvm,u32 sta_id,u16 tids)2239 int iwl_mvm_flush_sta_tids(struct iwl_mvm *mvm, u32 sta_id, u16 tids)
2240 {
2241 int ret;
2242 struct iwl_tx_path_flush_cmd_rsp *rsp;
2243 struct iwl_tx_path_flush_cmd flush_cmd = {
2244 .sta_id = cpu_to_le32(sta_id),
2245 .tid_mask = cpu_to_le16(tids),
2246 };
2247
2248 struct iwl_host_cmd cmd = {
2249 .id = TXPATH_FLUSH,
2250 .len = { sizeof(flush_cmd), },
2251 .data = { &flush_cmd, },
2252 };
2253
2254 WARN_ON(!iwl_mvm_has_new_tx_api(mvm));
2255
2256 if (iwl_fw_lookup_notif_ver(mvm->fw, LONG_GROUP, TXPATH_FLUSH, 0) > 0)
2257 cmd.flags |= CMD_WANT_SKB | CMD_SEND_IN_RFKILL;
2258
2259 IWL_DEBUG_TX_QUEUES(mvm, "flush for sta id %d tid mask 0x%x\n",
2260 sta_id, tids);
2261
2262 ret = iwl_mvm_send_cmd(mvm, &cmd);
2263
2264 if (ret) {
2265 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
2266 return ret;
2267 }
2268
2269 if (cmd.flags & CMD_WANT_SKB) {
2270 int i;
2271 int num_flushed_queues;
2272
2273 if (WARN_ON_ONCE(iwl_rx_packet_payload_len(cmd.resp_pkt) != sizeof(*rsp))) {
2274 ret = -EIO;
2275 goto free_rsp;
2276 }
2277
2278 rsp = (void *)cmd.resp_pkt->data;
2279
2280 if (WARN_ONCE(le16_to_cpu(rsp->sta_id) != sta_id,
2281 "sta_id %d != rsp_sta_id %d",
2282 sta_id, le16_to_cpu(rsp->sta_id))) {
2283 ret = -EIO;
2284 goto free_rsp;
2285 }
2286
2287 num_flushed_queues = le16_to_cpu(rsp->num_flushed_queues);
2288 if (WARN_ONCE(num_flushed_queues > IWL_TX_FLUSH_QUEUE_RSP,
2289 "num_flushed_queues %d", num_flushed_queues)) {
2290 ret = -EIO;
2291 goto free_rsp;
2292 }
2293
2294 for (i = 0; i < num_flushed_queues; i++) {
2295 struct ieee80211_tx_info tx_info = {};
2296 struct iwl_flush_queue_info *queue_info = &rsp->queues[i];
2297 int tid = le16_to_cpu(queue_info->tid);
2298 int read_before = le16_to_cpu(queue_info->read_before_flush);
2299 int read_after = le16_to_cpu(queue_info->read_after_flush);
2300 int queue_num = le16_to_cpu(queue_info->queue_num);
2301
2302 if (tid == IWL_MGMT_TID)
2303 tid = IWL_MAX_TID_COUNT;
2304
2305 IWL_DEBUG_TX_QUEUES(mvm,
2306 "tid %d queue_id %d read-before %d read-after %d\n",
2307 tid, queue_num, read_before, read_after);
2308
2309 iwl_mvm_tx_reclaim(mvm, sta_id, tid, queue_num, read_after,
2310 &tx_info, 0, true);
2311 }
2312 free_rsp:
2313 iwl_free_resp(&cmd);
2314 }
2315 return ret;
2316 }
2317
iwl_mvm_flush_sta(struct iwl_mvm * mvm,u32 sta_id,u32 tfd_queue_mask)2318 int iwl_mvm_flush_sta(struct iwl_mvm *mvm, u32 sta_id, u32 tfd_queue_mask)
2319 {
2320 if (iwl_mvm_has_new_tx_api(mvm))
2321 return iwl_mvm_flush_sta_tids(mvm, sta_id, 0xffff);
2322
2323 return iwl_mvm_flush_tx_path(mvm, tfd_queue_mask);
2324 }
2325