drivers/net/wireless/intel/iwlwifi/mvm/tx.c

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