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1// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause2/*3 * Copyright (C) 2012-2014, 2018-2024 Intel Corporation4 * Copyright (C) 2013-2015 Intel Mobile Communications GmbH5 * Copyright (C) 2016-2017 Intel Deutschland GmbH6 */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 20static void21iwl_mvm_bar_check_trigger(struct iwl_mvm *mvm, const u8 *addr,22 u16 tid, u16 ssn)23{24 struct iwl_fw_dbg_trigger_tlv *trig;25 struct iwl_fw_dbg_trigger_ba *ba_trig;26 27 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, FW_DBG_TRIGGER_BA);28 if (!trig)29 return;30 31 ba_trig = (void *)trig->data;32 33 if (!(le16_to_cpu(ba_trig->tx_bar) & BIT(tid)))34 return;35 36 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,37 "BAR sent to %pM, tid %d, ssn %d",38 addr, tid, ssn);39}40 41#define OPT_HDR(type, skb, off) \42 (type *)(skb_network_header(skb) + (off))43 44static u32 iwl_mvm_tx_csum(struct iwl_mvm *mvm, struct sk_buff *skb,45 struct ieee80211_tx_info *info,46 bool amsdu)47{48 struct ieee80211_hdr *hdr = (void *)skb->data;49 u16 mh_len = ieee80211_hdrlen(hdr->frame_control);50 u16 offload_assist = 0;51#if IS_ENABLED(CONFIG_INET)52 u8 protocol = 0;53 54 /* Do not compute checksum if already computed */55 if (skb->ip_summed != CHECKSUM_PARTIAL)56 goto out;57 58 /* We do not expect to be requested to csum stuff we do not support */59 if (WARN_ONCE(!(mvm->hw->netdev_features & IWL_TX_CSUM_NETIF_FLAGS) ||60 (skb->protocol != htons(ETH_P_IP) &&61 skb->protocol != htons(ETH_P_IPV6)),62 "No support for requested checksum\n")) {63 skb_checksum_help(skb);64 goto out;65 }66 67 if (skb->protocol == htons(ETH_P_IP)) {68 protocol = ip_hdr(skb)->protocol;69 } else {70#if IS_ENABLED(CONFIG_IPV6)71 struct ipv6hdr *ipv6h =72 (struct ipv6hdr *)skb_network_header(skb);73 unsigned int off = sizeof(*ipv6h);74 75 protocol = ipv6h->nexthdr;76 while (protocol != NEXTHDR_NONE && ipv6_ext_hdr(protocol)) {77 struct ipv6_opt_hdr *hp;78 79 /* only supported extension headers */80 if (protocol != NEXTHDR_ROUTING &&81 protocol != NEXTHDR_HOP &&82 protocol != NEXTHDR_DEST) {83 skb_checksum_help(skb);84 goto out;85 }86 87 hp = OPT_HDR(struct ipv6_opt_hdr, skb, off);88 protocol = hp->nexthdr;89 off += ipv6_optlen(hp);90 }91 /* if we get here - protocol now should be TCP/UDP */92#endif93 }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 else121 udp_hdr(skb)->check = 0;122 123out:124#endif125 /*126 * mac header len should include IV, size is in words unless127 * 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 fields148 */149void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb,150 struct iwl_tx_cmd *tx_cmd,151 struct ieee80211_tx_info *info, u8 sta_id)152{153 struct ieee80211_hdr *hdr = (void *)skb->data;154 __le16 fc = hdr->frame_control;155 u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags);156 u32 len = skb->len + FCS_LEN;157 bool amsdu = false;158 u8 ac;159 160 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) ||161 (ieee80211_is_probe_resp(fc) &&162 !is_multicast_ether_addr(hdr->addr1)))163 tx_flags |= TX_CMD_FLG_ACK;164 else165 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 else194 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 else199 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 else206 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 else217 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);218 219 /* The spec allows Action frames in A-MPDU, we don't support220 * it221 */222 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU);223 } else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) {224 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);225 } else {226 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);227 }228 229 if (ieee80211_is_data(fc) && len > mvm->rts_threshold &&230 !is_multicast_ether_addr(hdr->addr1))231 tx_flags |= TX_CMD_FLG_PROT_REQUIRE;232 233 if (fw_has_capa(&mvm->fw->ucode_capa,234 IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT) &&235 ieee80211_action_contains_tpc(skb))236 tx_flags |= TX_CMD_FLG_WRITE_TX_POWER;237 238 tx_cmd->tx_flags = cpu_to_le32(tx_flags);239 /* Total # bytes to be transmitted - PCIe code will adjust for A-MSDU */240 tx_cmd->len = cpu_to_le16((u16)skb->len);241 tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);242 tx_cmd->sta_id = sta_id;243 244 tx_cmd->offload_assist =245 cpu_to_le16(iwl_mvm_tx_csum(mvm, skb, info, amsdu));246}247 248static u32 iwl_mvm_get_tx_ant(struct iwl_mvm *mvm,249 struct ieee80211_tx_info *info,250 struct ieee80211_sta *sta, __le16 fc)251{252 if (info->band == NL80211_BAND_2GHZ &&253 !iwl_mvm_bt_coex_is_shared_ant_avail(mvm))254 return mvm->cfg->non_shared_ant << RATE_MCS_ANT_POS;255 256 if (sta && ieee80211_is_data(fc)) {257 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);258 259 return BIT(mvmsta->tx_ant) << RATE_MCS_ANT_POS;260 }261 262 return BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS;263}264 265static u32 iwl_mvm_convert_rate_idx(struct iwl_mvm *mvm,266 struct ieee80211_tx_info *info,267 int rate_idx)268{269 u32 rate_flags = 0;270 u8 rate_plcp;271 bool is_cck;272 273 /* if the rate isn't a well known legacy rate, take the lowest one */274 if (rate_idx < 0 || rate_idx >= IWL_RATE_COUNT_LEGACY)275 rate_idx = iwl_mvm_mac_ctxt_get_lowest_rate(mvm,276 info,277 info->control.vif);278 279 /* Get PLCP rate for tx_cmd->rate_n_flags */280 rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(mvm->fw, rate_idx);281 is_cck = (rate_idx >= IWL_FIRST_CCK_RATE) &&282 (rate_idx <= IWL_LAST_CCK_RATE);283 284 /* Set CCK or OFDM flag */285 if (iwl_fw_lookup_cmd_ver(mvm->fw, TX_CMD, 0) > 8) {286 if (!is_cck)287 rate_flags |= RATE_MCS_LEGACY_OFDM_MSK;288 else289 rate_flags |= RATE_MCS_CCK_MSK;290 } else if (is_cck) {291 rate_flags |= RATE_MCS_CCK_MSK_V1;292 }293 294 return (u32)rate_plcp | rate_flags;295}296 297static u32 iwl_mvm_get_inject_tx_rate(struct iwl_mvm *mvm,298 struct ieee80211_tx_info *info,299 struct ieee80211_sta *sta,300 __le16 fc)301{302 struct ieee80211_tx_rate *rate = &info->control.rates[0];303 u32 result;304 305 /*306 * we only care about legacy/HT/VHT so far, so we can307 * 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 else354 result |= iwl_mvm_get_tx_ant(mvm, info, sta, fc);355 356 return result;357}358 359static u32 iwl_mvm_get_tx_rate(struct iwl_mvm *mvm,360 struct ieee80211_tx_info *info,361 struct ieee80211_sta *sta, __le16 fc)362{363 int rate_idx = -1;364 365 if (!ieee80211_hw_check(mvm->hw, HAS_RATE_CONTROL)) {366 /* info->control is only relevant for non HW rate control */367 368 /* HT rate doesn't make sense for a non data frame */369 WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS &&370 !ieee80211_is_data(fc),371 "Got a HT rate (flags:0x%x/mcs:%d/fc:0x%x/state:%d) for a non data frame\n",372 info->control.rates[0].flags,373 info->control.rates[0].idx,374 le16_to_cpu(fc),375 sta ? iwl_mvm_sta_from_mac80211(sta)->sta_state : -1);376 377 rate_idx = info->control.rates[0].idx;378 379 /* For non 2 GHZ band, remap mac80211 rate indices into driver380 * indices.381 */382 if (info->band != NL80211_BAND_2GHZ ||383 (info->flags & IEEE80211_TX_CTL_NO_CCK_RATE))384 rate_idx += IWL_FIRST_OFDM_RATE;385 386 /* For 2.4 GHZ band, check that there is no need to remap */387 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);388 }389 390 return iwl_mvm_convert_rate_idx(mvm, info, rate_idx);391}392 393static u32 iwl_mvm_get_tx_rate_n_flags(struct iwl_mvm *mvm,394 struct ieee80211_tx_info *info,395 struct ieee80211_sta *sta, __le16 fc)396{397 if (unlikely(info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT))398 return iwl_mvm_get_inject_tx_rate(mvm, info, sta, fc);399 400 return iwl_mvm_get_tx_rate(mvm, info, sta, fc) |401 iwl_mvm_get_tx_ant(mvm, info, sta, fc);402}403 404/*405 * Sets the fields in the Tx cmd that are rate related406 */407void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd,408 struct ieee80211_tx_info *info,409 struct ieee80211_sta *sta, __le16 fc)410{411 /* Set retry limit on RTS packets */412 tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT;413 414 /* Set retry limit on DATA packets and Probe Responses*/415 if (ieee80211_is_probe_resp(fc)) {416 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT;417 tx_cmd->rts_retry_limit =418 min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit);419 } else if (ieee80211_is_back_req(fc)) {420 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT;421 } else {422 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY;423 }424 425 /*426 * for data packets, rate info comes from the table inside the fw. This427 * table is controlled by LINK_QUALITY commands428 */429 430 if (likely(ieee80211_is_data(fc) && sta &&431 !(info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT))) {432 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);433 434 if (mvmsta->sta_state >= IEEE80211_STA_AUTHORIZED) {435 tx_cmd->initial_rate_index = 0;436 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE);437 return;438 }439 } else if (ieee80211_is_back_req(fc)) {440 tx_cmd->tx_flags |=441 cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR);442 }443 444 /* Set the rate in the TX cmd */445 tx_cmd->rate_n_flags =446 cpu_to_le32(iwl_mvm_get_tx_rate_n_flags(mvm, info, sta, fc));447}448 449static inline void iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info *info,450 u8 *crypto_hdr)451{452 struct ieee80211_key_conf *keyconf = info->control.hw_key;453 u64 pn;454 455 pn = atomic64_inc_return(&keyconf->tx_pn);456 crypto_hdr[0] = pn;457 crypto_hdr[2] = 0;458 crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6);459 crypto_hdr[1] = pn >> 8;460 crypto_hdr[4] = pn >> 16;461 crypto_hdr[5] = pn >> 24;462 crypto_hdr[6] = pn >> 32;463 crypto_hdr[7] = pn >> 40;464}465 466/*467 * Sets the fields in the Tx cmd that are crypto related468 */469static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm,470 struct ieee80211_tx_info *info,471 struct iwl_tx_cmd *tx_cmd,472 struct sk_buff *skb_frag,473 int hdrlen)474{475 struct ieee80211_key_conf *keyconf = info->control.hw_key;476 u8 *crypto_hdr = skb_frag->data + hdrlen;477 enum iwl_tx_cmd_sec_ctrl type = TX_CMD_SEC_CCM;478 u64 pn;479 480 switch (keyconf->cipher) {481 case WLAN_CIPHER_SUITE_CCMP:482 iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd);483 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr);484 break;485 486 case WLAN_CIPHER_SUITE_TKIP:487 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;488 pn = atomic64_inc_return(&keyconf->tx_pn);489 ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn);490 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);491 break;492 493 case WLAN_CIPHER_SUITE_WEP104:494 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;495 fallthrough;496 case WLAN_CIPHER_SUITE_WEP40:497 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP |498 ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) &499 TX_CMD_SEC_WEP_KEY_IDX_MSK);500 501 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);502 break;503 case WLAN_CIPHER_SUITE_GCMP:504 case WLAN_CIPHER_SUITE_GCMP_256:505 type = TX_CMD_SEC_GCMP;506 fallthrough;507 case WLAN_CIPHER_SUITE_CCMP_256:508 /* TODO: Taking the key from the table might introduce a race509 * when PTK rekeying is done, having an old packets with a PN510 * based on the old key but the message encrypted with a new511 * one.512 * Need to handle this.513 */514 tx_cmd->sec_ctl |= type | TX_CMD_SEC_KEY_FROM_TABLE;515 tx_cmd->key[0] = keyconf->hw_key_idx;516 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr);517 break;518 default:519 tx_cmd->sec_ctl |= TX_CMD_SEC_EXT;520 }521}522 523static 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 that540 * can't possibly be doing MLO (firmware may be selecting a541 * bad rate), if we might be doing MLO we need to let FW pick542 * (since we don't necesarily know the link), but FW rate543 * selection was fixed.544 */545 return mvm->trans->trans_cfg->device_family < IWL_DEVICE_FAMILY_BZ;546}547 548static 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 skb560 */561static struct iwl_device_tx_cmd *562iwl_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 (for596 * new devices, older FW is somewhat broken for this). Only597 * set rate/antenna for injected frames with fixed rate, or598 * 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 658out:659 return dev_cmd;660}661 662static 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 673static 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 they686 * use the probe queue.687 * Also take care of the case where we send a deauth to a688 * station that we don't have, or similarly an association689 * response (with non-success status) for a station we can't690 * accept.691 * Also, disassociate frames might happen, particular with692 * 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 718static 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 775out:776 rcu_read_unlock();777}778 779int 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 packets813 * that can be used in 2 different types of vifs, P2P814 * 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 else837 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 else847 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 883unsigned 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 the903 * 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 else917 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_INET940 941static int942iwl_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 TX978 * command. We have: SNAP + IP + TCP for n -1 subframes and979 * 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 1013static 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 modified1050 * 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 station1059 */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 not1066 * supported. This is a spec requirement (IEEE 802.11-20151067 * 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 is1079 * 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 subframe1093 * 1 more for each fragment1094 * 1 more for the potential data in the header1095 */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 it1111 * 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 */1117static 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#endif1128 1129/* Check if there are any timed-out TIDs on a given shared TXQ */1130static 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 1148static 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 1169static 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 */1191static 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 firmware1233 * will always send a notification, and for PS-Poll responses1234 * we'll notify mac80211 when getting frame status1235 */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) and1242 * !ieee80211_is_data_qos(fc) keep the default assignment of MGMT TID1243 */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 will1288 * reconfig the queues and update them1289 *1290 * Note that the no lock is taken here in order to not serialize1291 * the TX flow. This isn't dangerous because scheduling1292 * mvm->add_stream_wk can't ruin the state, and if we DON'T1293 * schedule it due to some race condition then next TX we get1294 * 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 present1311 * in the skb, hence, don't tell iwl_mvm_mei_tx_copy_to_csme about the1312 * 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 1334drop_unlock_sta:1335 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);1336 spin_unlock(&mvmsta->lock);1337drop:1338 IWL_DEBUG_TX(mvm, "TX to [%d|%d] dropped\n", mvmsta->deflink.sta_id,1339 tid);1340 return -1;1341}1342 1343int 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 (Address1388 * field contents), A-MSDU address 3 should contain the BSSID1389 * address.1390 * Pass address 3 down to iwl_mvm_tx_mpdu() and further to set it1391 * in the command header. We need to preserve the original1392 * address 3 in the skb header to correctly create all the1393 * 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 else1428 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 1437static 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 tell1452 * mac80211 so it knows we no longer have frames buffered for1453 * 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 need1460 * 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_DEBUG1492const char *iwl_mvm_get_tx_fail_reason(u32 status)1493{1494#define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x1495#define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x1496 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_FAIL1527#undef TX_STATUS_POSTPONE1528}1529#endif /* CONFIG_IWLWIFI_DEBUG */1530 1531static 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 1547void 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 1580void 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 values1609 */1610static 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 1626static 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 SCD1669 * @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. Since1672 * it can't know that everything will go well until the end of the AMPDU, it1673 * can't know in advance the number of MPDUs that will be sent in the current1674 * 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 end1676 * of the batch. This is why the SSN of the SCD is written at the end of the1677 * whole struct at a variable offset. This function knows how to cope with the1678 * 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 */1682static 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 1693static 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 not1748 * return this status1749 */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 frames1765 * but the first one as acked, since they were acknowledged1766 * before1767 * */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 driver1780 * TLC uses this and doesn't support the new FW rate1781 */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 since1801 * its sequence control is 0. Note that for that same1802 * reason, NDPs are never sent to A-MPDU'able queues1803 * so that we can never have more than one freed frame1804 * 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 one1812 * 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 use1826 * the ssn since: ssn = wifi seq_num % 256.1827 * The seq_ctl is the sequence control of the packet to which1828 * this Tx response relates. But if there is a hole in the1829 * bitmap of the BA we received, this Tx response may allow to1830 * reclaim the hole and all the subsequent packets that were1831 * already acked. In that case, seq_ctl != ssn, and the next1832 * packet to be reclaimed will be ssn and not seq_ctl. In that1833 * case, several packets will be reclaimed even if1834 * frame_count = 1.1835 *1836 * The ssn is the index (% 256) of the latest packet that has1837 * 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 in1856 * 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 queue1897 * dropped to 0 even if we sent less1898 * frames than we thought we had on the1899 * Tx queue.1900 * This means we had holes in the BA1901 * window that we just filled, ask1902 * mac80211 to send EOSP since the1903 * firmware won't know how to do that.1904 * Send NDP and the firmware will send1905 * EOSP notification that will trigger1906 * 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 }1927out:1928 rcu_read_unlock();1929}1930 1931#ifdef CONFIG_IWLWIFI_DEBUG1932#define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x1933static 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 1954static 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#else1983static 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 1988static 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 2029void 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 else2037 iwl_mvm_rx_tx_cmd_agg(mvm, pkt);2038}2039 2040static 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 of2071 * block-ack window (we assume that they've been successfully2072 * 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 single2083 * frames because before failing a frame the firmware transmits2084 * it without aggregation at least once.2085 */2086 if (!is_flush)2087 info->flags |= IEEE80211_TX_STAT_ACK;2088 else2089 info->flags &= ~IEEE80211_TX_STAT_ACK;2090 }2091 2092 /*2093 * It's possible to get a BA response after invalidating the rcu (rcu is2094 * invalidated in order to prevent new Tx from being sent, but there may2095 * be some frames already in-flight).2096 * In this case we just want to reclaim, and could skip all the2097 * sta-dependent stuff since it's in the middle of being removed2098 * 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 else2136 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 is2152 * 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 2174out: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 2183void 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 rcu2235 * (rcu is invalidated in order to prevent new Tx from being2236 * sent, but there may be some frames already in-flight).2237 * In this case we just want to reclaim, and could skip all the2238 * sta-dependent stuff since it's in the middle of being removed2239 * 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 index2278 * (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 reach2319 * the firmware. This means that after flush_tx_path is called, the2320 * queue might not be empty. The race-free way to handle this is to:2321 * 1) set the station as draining2322 * 2) flush the Tx path2323 * 3) wait for the transport queues to be empty2324 */2325int 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 2341int 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 }2414free_rsp:2415 iwl_free_resp(&cmd);2416 }2417 return ret;2418}2419 2420int 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