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, 2018-2021 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_pre_bz(struct iwl_mvm *mvm, struct sk_buff *skb,
  43                                   struct ieee80211_tx_info *info, bool amsdu)
  44 {
  45         struct ieee80211_hdr *hdr = (void *)skb->data;
  46         u16 offload_assist = 0;
  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) && amsdu) {
 110                 ip_hdr(skb)->check = 0;
 111                 offload_assist |= BIT(TX_CMD_OFFLD_L3_EN);
 112         }
 113
 114         /* reset UDP/TCP header csum */
 115         if (protocol == IPPROTO_TCP)
 116                 tcp_hdr(skb)->check = 0;
 117         else
 118                 udp_hdr(skb)->check = 0;
 119
 120         /*
 121          * mac header len should include IV, size is in words unless
 122          * the IV is added by the firmware like in WEP.
 123          * In new Tx API, the IV is always added by the firmware.
 124          */
 125         if (!iwl_mvm_has_new_tx_api(mvm) && info->control.hw_key &&
 126             info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP40 &&
 127             info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP104)
 128                 mh_len += info->control.hw_key->iv_len;
 129         mh_len /= 2;
 130         offload_assist |= mh_len << TX_CMD_OFFLD_MH_SIZE;
 131
 132 out:
 133 #endif
 134         if (amsdu)
 135                 offload_assist |= BIT(TX_CMD_OFFLD_AMSDU);
 136         else if (ieee80211_hdrlen(hdr->frame_control) % 4)
 137                 /* padding is inserted later in transport */
 138                 offload_assist |= BIT(TX_CMD_OFFLD_PAD);
 139
 140         return offload_assist;
 141 }
 142
 143 u32 iwl_mvm_tx_csum_bz(struct iwl_mvm *mvm, struct sk_buff *skb, bool amsdu)
 144 {
 145         struct ieee80211_hdr *hdr = (void *)skb->data;
 146         u32 offload_assist = IWL_TX_CMD_OFFLD_BZ_PARTIAL_CSUM;
 147         unsigned int hdrlen = ieee80211_hdrlen(hdr->frame_control);
 148         unsigned int csum_start = skb_checksum_start_offset(skb);
 149
 150         offload_assist |= u32_encode_bits(hdrlen / 2,
 151                                           IWL_TX_CMD_OFFLD_BZ_MH_LEN);
 152         if (amsdu)
 153                 offload_assist |= IWL_TX_CMD_OFFLD_BZ_AMSDU;
 154         else if (hdrlen % 4)
 155                 /* padding is inserted later in transport */
 156                 offload_assist |= IWL_TX_CMD_OFFLD_BZ_MH_PAD;
 157
 158         if (skb->ip_summed != CHECKSUM_PARTIAL)
 159                 return offload_assist;
 160
 161         offload_assist |= IWL_TX_CMD_OFFLD_BZ_ENABLE_CSUM |
 162                           IWL_TX_CMD_OFFLD_BZ_ZERO2ONES;
 163
 164         /*
 165          * mac80211 will always calculate checksum in software for
 166          * non-fast-xmit, and so we can only do offloaded checksum
 167          * for fast-xmit frames. In this case, we always have the
 168          * RFC 1042 header present. skb_checksum_start_offset()
 169          * returns the offset from the beginning, but the hardware
 170          * needs it from after the header & SNAP header.
 171          */
 172         csum_start -= hdrlen + 8;
 173
 174         offload_assist |= u32_encode_bits(csum_start,
 175                                           IWL_TX_CMD_OFFLD_BZ_START_OFFS);
 176         offload_assist |= u32_encode_bits(csum_start + skb->csum_offset,
 177                                           IWL_TX_CMD_OFFLD_BZ_RESULT_OFFS);
 178
 179         return offload_assist;
 180 }
 181
 182 static u32 iwl_mvm_tx_csum(struct iwl_mvm *mvm, struct sk_buff *skb,
 183                            struct ieee80211_tx_info *info,
 184                            bool amsdu)
 185 {
 186         if (mvm->trans->trans_cfg->device_family < IWL_DEVICE_FAMILY_BZ)
 187                 return iwl_mvm_tx_csum_pre_bz(mvm, skb, info, amsdu);
 188         return iwl_mvm_tx_csum_bz(mvm, skb, amsdu);
 189 }
 190
 191 /*
 192  * Sets most of the Tx cmd's fields
 193  */
 194 void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb,
 195                         struct iwl_tx_cmd *tx_cmd,
 196                         struct ieee80211_tx_info *info, u8 sta_id)
 197 {
 198         struct ieee80211_hdr *hdr = (void *)skb->data;
 199         __le16 fc = hdr->frame_control;
 200         u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags);
 201         u32 len = skb->len + FCS_LEN;
 202         bool amsdu = false;
 203         u8 ac;
 204
 205         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) ||
 206             (ieee80211_is_probe_resp(fc) &&
 207              !is_multicast_ether_addr(hdr->addr1)))
 208                 tx_flags |= TX_CMD_FLG_ACK;
 209         else
 210                 tx_flags &= ~TX_CMD_FLG_ACK;
 211
 212         if (ieee80211_is_probe_resp(fc))
 213                 tx_flags |= TX_CMD_FLG_TSF;
 214
 215         if (ieee80211_has_morefrags(fc))
 216                 tx_flags |= TX_CMD_FLG_MORE_FRAG;
 217
 218         if (ieee80211_is_data_qos(fc)) {
 219                 u8 *qc = ieee80211_get_qos_ctl(hdr);
 220                 tx_cmd->tid_tspec = qc[0] & 0xf;
 221                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
 222                 amsdu = *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT;
 223         } else if (ieee80211_is_back_req(fc)) {
 224                 struct ieee80211_bar *bar = (void *)skb->data;
 225                 u16 control = le16_to_cpu(bar->control);
 226                 u16 ssn = le16_to_cpu(bar->start_seq_num);
 227
 228                 tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR;
 229                 tx_cmd->tid_tspec = (control &
 230                                      IEEE80211_BAR_CTRL_TID_INFO_MASK) >>
 231                         IEEE80211_BAR_CTRL_TID_INFO_SHIFT;
 232                 WARN_ON_ONCE(tx_cmd->tid_tspec >= IWL_MAX_TID_COUNT);
 233                 iwl_mvm_bar_check_trigger(mvm, bar->ra, tx_cmd->tid_tspec,
 234                                           ssn);
 235         } else {
 236                 if (ieee80211_is_data(fc))
 237                         tx_cmd->tid_tspec = IWL_TID_NON_QOS;
 238                 else
 239                         tx_cmd->tid_tspec = IWL_MAX_TID_COUNT;
 240
 241                 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
 242                         tx_flags |= TX_CMD_FLG_SEQ_CTL;
 243                 else
 244                         tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
 245         }
 246
 247         /* Default to 0 (BE) when tid_spec is set to IWL_MAX_TID_COUNT */
 248         if (tx_cmd->tid_tspec < IWL_MAX_TID_COUNT)
 249                 ac = tid_to_mac80211_ac[tx_cmd->tid_tspec];
 250         else
 251                 ac = tid_to_mac80211_ac[0];
 252
 253         tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) <<
 254                         TX_CMD_FLG_BT_PRIO_POS;
 255
 256         if (ieee80211_is_mgmt(fc)) {
 257                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
 258                         tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_ASSOC);
 259                 else if (ieee80211_is_action(fc))
 260                         tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
 261                 else
 262                         tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
 263
 264                 /* The spec allows Action frames in A-MPDU, we don't support
 265                  * it
 266                  */
 267                 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU);
 268         } else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) {
 269                 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
 270         } else {
 271                 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
 272         }
 273
 274         if (ieee80211_is_data(fc) && len > mvm->rts_threshold &&
 275             !is_multicast_ether_addr(hdr->addr1))
 276                 tx_flags |= TX_CMD_FLG_PROT_REQUIRE;
 277
 278         if (fw_has_capa(&mvm->fw->ucode_capa,
 279                         IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT) &&
 280             ieee80211_action_contains_tpc(skb))
 281                 tx_flags |= TX_CMD_FLG_WRITE_TX_POWER;
 282
 283         tx_cmd->tx_flags = cpu_to_le32(tx_flags);
 284         /* Total # bytes to be transmitted - PCIe code will adjust for A-MSDU */
 285         tx_cmd->len = cpu_to_le16((u16)skb->len);
 286         tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
 287         tx_cmd->sta_id = sta_id;
 288
 289         tx_cmd->offload_assist =
 290                 cpu_to_le16(iwl_mvm_tx_csum_pre_bz(mvm, skb, info, amsdu));
 291 }
 292
 293 static u32 iwl_mvm_get_tx_ant(struct iwl_mvm *mvm,
 294                               struct ieee80211_tx_info *info,
 295                               struct ieee80211_sta *sta, __le16 fc)
 296 {
 297         if (info->band == NL80211_BAND_2GHZ &&
 298             !iwl_mvm_bt_coex_is_shared_ant_avail(mvm))
 299                 return mvm->cfg->non_shared_ant << RATE_MCS_ANT_POS;
 300
 301         if (sta && ieee80211_is_data(fc)) {
 302                 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 303
 304                 return BIT(mvmsta->tx_ant) << RATE_MCS_ANT_POS;
 305         }
 306
 307         return BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS;
 308 }
 309
 310 static u32 iwl_mvm_get_tx_rate(struct iwl_mvm *mvm,
 311                                struct ieee80211_tx_info *info,
 312                                struct ieee80211_sta *sta, __le16 fc)
 313 {
 314         int rate_idx = -1;
 315         u8 rate_plcp;
 316         u32 rate_flags = 0;
 317         bool is_cck;
 318
 319         /* info->control is only relevant for non HW rate control */
 320         if (!ieee80211_hw_check(mvm->hw, HAS_RATE_CONTROL)) {
 321                 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 322
 323                 /* HT rate doesn't make sense for a non data frame */
 324                 WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS &&
 325                           !ieee80211_is_data(fc),
 326                           "Got a HT rate (flags:0x%x/mcs:%d/fc:0x%x/state:%d) for a non data frame\n",
 327                           info->control.rates[0].flags,
 328                           info->control.rates[0].idx,
 329                           le16_to_cpu(fc), sta ? mvmsta->sta_state : -1);
 330
 331                 rate_idx = info->control.rates[0].idx;
 332         }
 333
 334         /* if the rate isn't a well known legacy rate, take the lowest one */
 335         if (rate_idx < 0 || rate_idx >= IWL_RATE_COUNT_LEGACY)
 336                 rate_idx = rate_lowest_index(
 337                                 &mvm->nvm_data->bands[info->band], sta);
 338
 339         /*
 340          * For non 2 GHZ band, remap mac80211 rate
 341          * indices into driver indices
 342          */
 343         if (info->band != NL80211_BAND_2GHZ)
 344                 rate_idx += IWL_FIRST_OFDM_RATE;
 345
 346         /* For 2.4 GHZ band, check that there is no need to remap */
 347         BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
 348
 349         /* Get PLCP rate for tx_cmd->rate_n_flags */
 350         rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(mvm->fw, rate_idx);
 351         is_cck = (rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE);
 352
 353         /* Set CCK or OFDM flag */
 354         if (iwl_fw_lookup_cmd_ver(mvm->fw, LONG_GROUP, TX_CMD, 0) > 8) {
 355                 if (!is_cck)
 356                         rate_flags |= RATE_MCS_LEGACY_OFDM_MSK;
 357                 else
 358                         rate_flags |= RATE_MCS_CCK_MSK;
 359         } else if (is_cck) {
 360                 rate_flags |= RATE_MCS_CCK_MSK_V1;
 361         }
 362
 363         return (u32)rate_plcp | rate_flags;
 364 }
 365
 366 static u32 iwl_mvm_get_tx_rate_n_flags(struct iwl_mvm *mvm,
 367                                        struct ieee80211_tx_info *info,
 368                                        struct ieee80211_sta *sta, __le16 fc)
 369 {
 370         return iwl_mvm_get_tx_rate(mvm, info, sta, fc) |
 371                 iwl_mvm_get_tx_ant(mvm, info, sta, fc);
 372 }
 373
 374 /*
 375  * Sets the fields in the Tx cmd that are rate related
 376  */
 377 void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd,
 378                             struct ieee80211_tx_info *info,
 379                             struct ieee80211_sta *sta, __le16 fc)
 380 {
 381         /* Set retry limit on RTS packets */
 382         tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT;
 383
 384         /* Set retry limit on DATA packets and Probe Responses*/
 385         if (ieee80211_is_probe_resp(fc)) {
 386                 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT;
 387                 tx_cmd->rts_retry_limit =
 388                         min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit);
 389         } else if (ieee80211_is_back_req(fc)) {
 390                 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT;
 391         } else {
 392                 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY;
 393         }
 394
 395         /*
 396          * for data packets, rate info comes from the table inside the fw. This
 397          * table is controlled by LINK_QUALITY commands
 398          */
 399
 400         if (ieee80211_is_data(fc) && sta) {
 401                 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 402
 403                 if (mvmsta->sta_state >= IEEE80211_STA_AUTHORIZED) {
 404                         tx_cmd->initial_rate_index = 0;
 405                         tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE);
 406                         return;
 407                 }
 408         } else if (ieee80211_is_back_req(fc)) {
 409                 tx_cmd->tx_flags |=
 410                         cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR);
 411         }
 412
 413         /* Set the rate in the TX cmd */
 414         tx_cmd->rate_n_flags =
 415                 cpu_to_le32(iwl_mvm_get_tx_rate_n_flags(mvm, info, sta, fc));
 416 }
 417
 418 static inline void iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info *info,
 419                                          u8 *crypto_hdr)
 420 {
 421         struct ieee80211_key_conf *keyconf = info->control.hw_key;
 422         u64 pn;
 423
 424         pn = atomic64_inc_return(&keyconf->tx_pn);
 425         crypto_hdr[0] = pn;
 426         crypto_hdr[2] = 0;
 427         crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6);
 428         crypto_hdr[1] = pn >> 8;
 429         crypto_hdr[4] = pn >> 16;
 430         crypto_hdr[5] = pn >> 24;
 431         crypto_hdr[6] = pn >> 32;
 432         crypto_hdr[7] = pn >> 40;
 433 }
 434
 435 /*
 436  * Sets the fields in the Tx cmd that are crypto related
 437  */
 438 static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm,
 439                                       struct ieee80211_tx_info *info,
 440                                       struct iwl_tx_cmd *tx_cmd,
 441                                       struct sk_buff *skb_frag,
 442                                       int hdrlen)
 443 {
 444         struct ieee80211_key_conf *keyconf = info->control.hw_key;
 445         u8 *crypto_hdr = skb_frag->data + hdrlen;
 446         enum iwl_tx_cmd_sec_ctrl type = TX_CMD_SEC_CCM;
 447         u64 pn;
 448
 449         switch (keyconf->cipher) {
 450         case WLAN_CIPHER_SUITE_CCMP:
 451                 iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd);
 452                 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr);
 453                 break;
 454
 455         case WLAN_CIPHER_SUITE_TKIP:
 456                 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
 457                 pn = atomic64_inc_return(&keyconf->tx_pn);
 458                 ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn);
 459                 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
 460                 break;
 461
 462         case WLAN_CIPHER_SUITE_WEP104:
 463                 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
 464                 fallthrough;
 465         case WLAN_CIPHER_SUITE_WEP40:
 466                 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP |
 467                         ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) &
 468                           TX_CMD_SEC_WEP_KEY_IDX_MSK);
 469
 470                 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
 471                 break;
 472         case WLAN_CIPHER_SUITE_GCMP:
 473         case WLAN_CIPHER_SUITE_GCMP_256:
 474                 type = TX_CMD_SEC_GCMP;
 475                 fallthrough;
 476         case WLAN_CIPHER_SUITE_CCMP_256:
 477                 /* TODO: Taking the key from the table might introduce a race
 478                  * when PTK rekeying is done, having an old packets with a PN
 479                  * based on the old key but the message encrypted with a new
 480                  * one.
 481                  * Need to handle this.
 482                  */
 483                 tx_cmd->sec_ctl |= type | TX_CMD_SEC_KEY_FROM_TABLE;
 484                 tx_cmd->key[0] = keyconf->hw_key_idx;
 485                 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr);
 486                 break;
 487         default:
 488                 tx_cmd->sec_ctl |= TX_CMD_SEC_EXT;
 489         }
 490 }
 491
 492 /*
 493  * Allocates and sets the Tx cmd the driver data pointers in the skb
 494  */
 495 static struct iwl_device_tx_cmd *
 496 iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb,
 497                       struct ieee80211_tx_info *info, int hdrlen,
 498                       struct ieee80211_sta *sta, u8 sta_id)
 499 {
 500         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 501         struct iwl_device_tx_cmd *dev_cmd;
 502         struct iwl_tx_cmd *tx_cmd;
 503
 504         dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans);
 505
 506         if (unlikely(!dev_cmd))
 507                 return NULL;
 508
 509         dev_cmd->hdr.cmd = TX_CMD;
 510
 511         if (iwl_mvm_has_new_tx_api(mvm)) {
 512                 u32 rate_n_flags = 0;
 513                 u16 flags = 0;
 514                 struct iwl_mvm_sta *mvmsta = sta ?
 515                         iwl_mvm_sta_from_mac80211(sta) : NULL;
 516                 bool amsdu = false;
 517
 518                 if (ieee80211_is_data_qos(hdr->frame_control)) {
 519                         u8 *qc = ieee80211_get_qos_ctl(hdr);
 520
 521                         amsdu = *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT;
 522                 }
 523
 524                 if (!info->control.hw_key)
 525                         flags |= IWL_TX_FLAGS_ENCRYPT_DIS;
 526
 527                 /*
 528                  * For data packets rate info comes from the fw. Only
 529                  * set rate/antenna during connection establishment or in case
 530                  * no station is given.
 531                  */
 532                 if (!sta || !ieee80211_is_data(hdr->frame_control) ||
 533                     mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) {
 534                         flags |= IWL_TX_FLAGS_CMD_RATE;
 535                         rate_n_flags =
 536                                 iwl_mvm_get_tx_rate_n_flags(mvm, info, sta,
 537                                                             hdr->frame_control);
 538                 }
 539
 540                 if (mvm->trans->trans_cfg->device_family >=
 541                     IWL_DEVICE_FAMILY_AX210) {
 542                         struct iwl_tx_cmd_gen3 *cmd = (void *)dev_cmd->payload;
 543                         u32 offload_assist = iwl_mvm_tx_csum(mvm, skb,
 544                                                              info, amsdu);
 545
 546                         cmd->offload_assist = cpu_to_le32(offload_assist);
 547
 548                         /* Total # bytes to be transmitted */
 549                         cmd->len = cpu_to_le16((u16)skb->len);
 550
 551                         /* Copy MAC header from skb into command buffer */
 552                         memcpy(cmd->hdr, hdr, hdrlen);
 553
 554                         cmd->flags = cpu_to_le16(flags);
 555                         cmd->rate_n_flags = cpu_to_le32(rate_n_flags);
 556                 } else {
 557                         struct iwl_tx_cmd_gen2 *cmd = (void *)dev_cmd->payload;
 558                         u16 offload_assist = iwl_mvm_tx_csum_pre_bz(mvm, skb,
 559                                                                     info,
 560                                                                     amsdu);
 561
 562                         cmd->offload_assist = cpu_to_le16(offload_assist);
 563
 564                         /* Total # bytes to be transmitted */
 565                         cmd->len = cpu_to_le16((u16)skb->len);
 566
 567                         /* Copy MAC header from skb into command buffer */
 568                         memcpy(cmd->hdr, hdr, hdrlen);
 569
 570                         cmd->flags = cpu_to_le32(flags);
 571                         cmd->rate_n_flags = cpu_to_le32(rate_n_flags);
 572                 }
 573                 goto out;
 574         }
 575
 576         tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
 577
 578         if (info->control.hw_key)
 579                 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen);
 580
 581         iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id);
 582
 583         iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control);
 584
 585         /* Copy MAC header from skb into command buffer */
 586         memcpy(tx_cmd->hdr, hdr, hdrlen);
 587
 588 out:
 589         return dev_cmd;
 590 }
 591
 592 static void iwl_mvm_skb_prepare_status(struct sk_buff *skb,
 593                                        struct iwl_device_tx_cmd *cmd)
 594 {
 595         struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb);
 596
 597         memset(&skb_info->status, 0, sizeof(skb_info->status));
 598         memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data));
 599
 600         skb_info->driver_data[1] = cmd;
 601 }
 602
 603 static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm,
 604                                       struct ieee80211_tx_info *info,
 605                                       struct ieee80211_hdr *hdr)
 606 {
 607         struct iwl_mvm_vif *mvmvif =
 608                 iwl_mvm_vif_from_mac80211(info->control.vif);
 609         __le16 fc = hdr->frame_control;
 610
 611         switch (info->control.vif->type) {
 612         case NL80211_IFTYPE_AP:
 613         case NL80211_IFTYPE_ADHOC:
 614                 /*
 615                  * Non-bufferable frames use the broadcast station, thus they
 616                  * use the probe queue.
 617                  * Also take care of the case where we send a deauth to a
 618                  * station that we don't have, or similarly an association
 619                  * response (with non-success status) for a station we can't
 620                  * accept.
 621                  * Also, disassociate frames might happen, particular with
 622                  * reason 7 ("Class 3 frame received from nonassociated STA").
 623                  */
 624                 if (ieee80211_is_mgmt(fc) &&
 625                     (!ieee80211_is_bufferable_mmpdu(fc) ||
 626                      ieee80211_is_deauth(fc) || ieee80211_is_disassoc(fc)))
 627                         return mvm->probe_queue;
 628
 629                 if (!ieee80211_has_order(fc) && !ieee80211_is_probe_req(fc) &&
 630                     is_multicast_ether_addr(hdr->addr1))
 631                         return mvmvif->cab_queue;
 632
 633                 WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC,
 634                           "fc=0x%02x", le16_to_cpu(fc));
 635                 return mvm->probe_queue;
 636         case NL80211_IFTYPE_P2P_DEVICE:
 637                 if (ieee80211_is_mgmt(fc))
 638                         return mvm->p2p_dev_queue;
 639
 640                 WARN_ON_ONCE(1);
 641                 return mvm->p2p_dev_queue;
 642         default:
 643                 WARN_ONCE(1, "Not a ctrl vif, no available queue\n");
 644                 return -1;
 645         }
 646 }
 647
 648 static void iwl_mvm_probe_resp_set_noa(struct iwl_mvm *mvm,
 649                                        struct sk_buff *skb)
 650 {
 651         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 652         struct iwl_mvm_vif *mvmvif =
 653                 iwl_mvm_vif_from_mac80211(info->control.vif);
 654         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
 655         int base_len = (u8 *)mgmt->u.probe_resp.variable - (u8 *)mgmt;
 656         struct iwl_probe_resp_data *resp_data;
 657         u8 *ie, *pos;
 658         u8 match[] = {
 659                 (WLAN_OUI_WFA >> 16) & 0xff,
 660                 (WLAN_OUI_WFA >> 8) & 0xff,
 661                 WLAN_OUI_WFA & 0xff,
 662                 WLAN_OUI_TYPE_WFA_P2P,
 663         };
 664
 665         rcu_read_lock();
 666
 667         resp_data = rcu_dereference(mvmvif->probe_resp_data);
 668         if (!resp_data)
 669                 goto out;
 670
 671         if (!resp_data->notif.noa_active)
 672                 goto out;
 673
 674         ie = (u8 *)cfg80211_find_ie_match(WLAN_EID_VENDOR_SPECIFIC,
 675                                           mgmt->u.probe_resp.variable,
 676                                           skb->len - base_len,
 677                                           match, 4, 2);
 678         if (!ie) {
 679                 IWL_DEBUG_TX(mvm, "probe resp doesn't have P2P IE\n");
 680                 goto out;
 681         }
 682
 683         if (skb_tailroom(skb) < resp_data->noa_len) {
 684                 if (pskb_expand_head(skb, 0, resp_data->noa_len, GFP_ATOMIC)) {
 685                         IWL_ERR(mvm,
 686                                 "Failed to reallocate probe resp\n");
 687                         goto out;
 688                 }
 689         }
 690
 691         pos = skb_put(skb, resp_data->noa_len);
 692
 693         *pos++ = WLAN_EID_VENDOR_SPECIFIC;
 694         /* Set length of IE body (not including ID and length itself) */
 695         *pos++ = resp_data->noa_len - 2;
 696         *pos++ = (WLAN_OUI_WFA >> 16) & 0xff;
 697         *pos++ = (WLAN_OUI_WFA >> 8) & 0xff;
 698         *pos++ = WLAN_OUI_WFA & 0xff;
 699         *pos++ = WLAN_OUI_TYPE_WFA_P2P;
 700
 701         memcpy(pos, &resp_data->notif.noa_attr,
 702                resp_data->noa_len - sizeof(struct ieee80211_vendor_ie));
 703
 704 out:
 705         rcu_read_unlock();
 706 }
 707
 708 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb)
 709 {
 710         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 711         struct ieee80211_tx_info info;
 712         struct iwl_device_tx_cmd *dev_cmd;
 713         u8 sta_id;
 714         int hdrlen = ieee80211_hdrlen(hdr->frame_control);
 715         __le16 fc = hdr->frame_control;
 716         bool offchannel = IEEE80211_SKB_CB(skb)->flags &
 717                 IEEE80211_TX_CTL_TX_OFFCHAN;
 718         int queue = -1;
 719
 720         if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc))
 721                 return -1;
 722
 723         memcpy(&info, skb->cb, sizeof(info));
 724
 725         if (WARN_ON_ONCE(skb->len > IEEE80211_MAX_DATA_LEN + hdrlen))
 726                 return -1;
 727
 728         if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU))
 729                 return -1;
 730
 731         if (info.control.vif) {
 732                 struct iwl_mvm_vif *mvmvif =
 733                         iwl_mvm_vif_from_mac80211(info.control.vif);
 734
 735                 if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE ||
 736                     info.control.vif->type == NL80211_IFTYPE_AP ||
 737                     info.control.vif->type == NL80211_IFTYPE_ADHOC) {
 738                         if (!ieee80211_is_data(hdr->frame_control))
 739                                 sta_id = mvmvif->bcast_sta.sta_id;
 740                         else
 741                                 sta_id = mvmvif->mcast_sta.sta_id;
 742
 743                         queue = iwl_mvm_get_ctrl_vif_queue(mvm, &info, hdr);
 744                 } else if (info.control.vif->type == NL80211_IFTYPE_MONITOR) {
 745                         queue = mvm->snif_queue;
 746                         sta_id = mvm->snif_sta.sta_id;
 747                 } else if (info.control.vif->type == NL80211_IFTYPE_STATION &&
 748                            offchannel) {
 749                         /*
 750                          * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets
 751                          * that can be used in 2 different types of vifs, P2P &
 752                          * STATION.
 753                          * P2P uses the offchannel queue.
 754                          * STATION (HS2.0) uses the auxiliary context of the FW,
 755                          * and hence needs to be sent on the aux queue.
 756                          */
 757                         sta_id = mvm->aux_sta.sta_id;
 758                         queue = mvm->aux_queue;
 759                 }
 760         }
 761
 762         if (queue < 0) {
 763                 IWL_ERR(mvm, "No queue was found. Dropping TX\n");
 764                 return -1;
 765         }
 766
 767         if (unlikely(ieee80211_is_probe_resp(fc)))
 768                 iwl_mvm_probe_resp_set_noa(mvm, skb);
 769
 770         IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue);
 771
 772         dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id);
 773         if (!dev_cmd)
 774                 return -1;
 775
 776         /* From now on, we cannot access info->control */
 777         iwl_mvm_skb_prepare_status(skb, dev_cmd);
 778
 779         if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) {
 780                 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
 781                 return -1;
 782         }
 783
 784         return 0;
 785 }
 786
 787 unsigned int iwl_mvm_max_amsdu_size(struct iwl_mvm *mvm,
 788                                     struct ieee80211_sta *sta, unsigned int tid)
 789 {
 790         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 791         enum nl80211_band band = mvmsta->vif->bss_conf.chandef.chan->band;
 792         u8 ac = tid_to_mac80211_ac[tid];
 793         unsigned int txf;
 794         int lmac = iwl_mvm_get_lmac_id(mvm->fw, band);
 795
 796         /* For HE redirect to trigger based fifos */
 797         if (sta->he_cap.has_he && !WARN_ON(!iwl_mvm_has_new_tx_api(mvm)))
 798                 ac += 4;
 799
 800         txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac);
 801
 802         /*
 803          * Don't send an AMSDU that will be longer than the TXF.
 804          * Add a security margin of 256 for the TX command + headers.
 805          * We also want to have the start of the next packet inside the
 806          * fifo to be able to send bursts.
 807          */
 808         return min_t(unsigned int, mvmsta->max_amsdu_len,
 809                      mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256);
 810 }
 811
 812 #ifdef CONFIG_INET
 813
 814 static int
 815 iwl_mvm_tx_tso_segment(struct sk_buff *skb, unsigned int num_subframes,
 816                        netdev_features_t netdev_flags,
 817                        struct sk_buff_head *mpdus_skb)
 818 {
 819         struct sk_buff *tmp, *next;
 820         struct ieee80211_hdr *hdr = (void *)skb->data;
 821         char cb[sizeof(skb->cb)];
 822         u16 i = 0;
 823         unsigned int tcp_payload_len;
 824         unsigned int mss = skb_shinfo(skb)->gso_size;
 825         bool ipv4 = (skb->protocol == htons(ETH_P_IP));
 826         bool qos = ieee80211_is_data_qos(hdr->frame_control);
 827         u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0;
 828
 829         skb_shinfo(skb)->gso_size = num_subframes * mss;
 830         memcpy(cb, skb->cb, sizeof(cb));
 831
 832         next = skb_gso_segment(skb, netdev_flags);
 833         skb_shinfo(skb)->gso_size = mss;
 834         skb_shinfo(skb)->gso_type = ipv4 ? SKB_GSO_TCPV4 : SKB_GSO_TCPV6;
 835         if (WARN_ON_ONCE(IS_ERR(next)))
 836                 return -EINVAL;
 837         else if (next)
 838                 consume_skb(skb);
 839
 840         skb_list_walk_safe(next, tmp, next) {
 841                 memcpy(tmp->cb, cb, sizeof(tmp->cb));
 842                 /*
 843                  * Compute the length of all the data added for the A-MSDU.
 844                  * This will be used to compute the length to write in the TX
 845                  * command. We have: SNAP + IP + TCP for n -1 subframes and
 846                  * ETH header for n subframes.
 847                  */
 848                 tcp_payload_len = skb_tail_pointer(tmp) -
 849                         skb_transport_header(tmp) -
 850                         tcp_hdrlen(tmp) + tmp->data_len;
 851
 852                 if (ipv4)
 853                         ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes);
 854
 855                 if (tcp_payload_len > mss) {
 856                         skb_shinfo(tmp)->gso_size = mss;
 857                         skb_shinfo(tmp)->gso_type = ipv4 ? SKB_GSO_TCPV4 :
 858                                                            SKB_GSO_TCPV6;
 859                 } else {
 860                         if (qos) {
 861                                 u8 *qc;
 862
 863                                 if (ipv4)
 864                                         ip_send_check(ip_hdr(tmp));
 865
 866                                 qc = ieee80211_get_qos_ctl((void *)tmp->data);
 867                                 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
 868                         }
 869                         skb_shinfo(tmp)->gso_size = 0;
 870                 }
 871
 872                 skb_mark_not_on_list(tmp);
 873                 __skb_queue_tail(mpdus_skb, tmp);
 874                 i++;
 875         }
 876
 877         return 0;
 878 }
 879
 880 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
 881                           struct ieee80211_tx_info *info,
 882                           struct ieee80211_sta *sta,
 883                           struct sk_buff_head *mpdus_skb)
 884 {
 885         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 886         struct ieee80211_hdr *hdr = (void *)skb->data;
 887         unsigned int mss = skb_shinfo(skb)->gso_size;
 888         unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len;
 889         u16 snap_ip_tcp, pad;
 890         netdev_features_t netdev_flags = NETIF_F_CSUM_MASK | NETIF_F_SG;
 891         u8 tid;
 892
 893         snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) +
 894                 tcp_hdrlen(skb);
 895
 896         if (!mvmsta->max_amsdu_len ||
 897             !ieee80211_is_data_qos(hdr->frame_control) ||
 898             !mvmsta->amsdu_enabled)
 899                 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
 900
 901         /*
 902          * Do not build AMSDU for IPv6 with extension headers.
 903          * ask stack to segment and checkum the generated MPDUs for us.
 904          */
 905         if (skb->protocol == htons(ETH_P_IPV6) &&
 906             ((struct ipv6hdr *)skb_network_header(skb))->nexthdr !=
 907             IPPROTO_TCP) {
 908                 netdev_flags &= ~NETIF_F_CSUM_MASK;
 909                 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
 910         }
 911
 912         tid = ieee80211_get_tid(hdr);
 913         if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
 914                 return -EINVAL;
 915
 916         /*
 917          * No need to lock amsdu_in_ampdu_allowed since it can't be modified
 918          * during an BA session.
 919          */
 920         if ((info->flags & IEEE80211_TX_CTL_AMPDU &&
 921              !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) ||
 922             !(mvmsta->amsdu_enabled & BIT(tid)))
 923                 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
 924
 925         /*
 926          * Take the min of ieee80211 station and mvm station
 927          */
 928         max_amsdu_len =
 929                 min_t(unsigned int, sta->max_amsdu_len,
 930                       iwl_mvm_max_amsdu_size(mvm, sta, tid));
 931
 932         /*
 933          * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not
 934          * supported. This is a spec requirement (IEEE 802.11-2015
 935          * section 8.7.3 NOTE 3).
 936          */
 937         if (info->flags & IEEE80211_TX_CTL_AMPDU &&
 938             !sta->vht_cap.vht_supported)
 939                 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095);
 940
 941         /* Sub frame header + SNAP + IP header + TCP header + MSS */
 942         subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss;
 943         pad = (4 - subf_len) & 0x3;
 944
 945         /*
 946          * If we have N subframes in the A-MSDU, then the A-MSDU's size is
 947          * N * subf_len + (N - 1) * pad.
 948          */
 949         num_subframes = (max_amsdu_len + pad) / (subf_len + pad);
 950
 951         if (sta->max_amsdu_subframes &&
 952             num_subframes > sta->max_amsdu_subframes)
 953                 num_subframes = sta->max_amsdu_subframes;
 954
 955         tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
 956                 tcp_hdrlen(skb) + skb->data_len;
 957
 958         /*
 959          * Make sure we have enough TBs for the A-MSDU:
 960          *      2 for each subframe
 961          *      1 more for each fragment
 962          *      1 more for the potential data in the header
 963          */
 964         if ((num_subframes * 2 + skb_shinfo(skb)->nr_frags + 1) >
 965             mvm->trans->max_skb_frags)
 966                 num_subframes = 1;
 967
 968         if (num_subframes > 1)
 969                 *ieee80211_get_qos_ctl(hdr) |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
 970
 971         /* This skb fits in one single A-MSDU */
 972         if (num_subframes * mss >= tcp_payload_len) {
 973                 __skb_queue_tail(mpdus_skb, skb);
 974                 return 0;
 975         }
 976
 977         /*
 978          * Trick the segmentation function to make it
 979          * create SKBs that can fit into one A-MSDU.
 980          */
 981         return iwl_mvm_tx_tso_segment(skb, num_subframes, netdev_flags,
 982                                       mpdus_skb);
 983 }
 984 #else /* CONFIG_INET */
 985 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
 986                           struct ieee80211_tx_info *info,
 987                           struct ieee80211_sta *sta,
 988                           struct sk_buff_head *mpdus_skb)
 989 {
 990         /* Impossible to get TSO with CONFIG_INET */
 991         WARN_ON(1);
 992
 993         return -1;
 994 }
 995 #endif
 996
 997 /* Check if there are any timed-out TIDs on a given shared TXQ */
 998 static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id)
 999 {
1000         unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap;
1001         unsigned long now = jiffies;
1002         int tid;
1003
1004         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1005                 return false;
1006
1007         for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) {
1008                 if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] +
1009                                 IWL_MVM_DQA_QUEUE_TIMEOUT, now))
1010                         return true;
1011         }
1012
1013         return false;
1014 }
1015
1016 static void iwl_mvm_tx_airtime(struct iwl_mvm *mvm,
1017                                struct iwl_mvm_sta *mvmsta,
1018                                int airtime)
1019 {
1020         int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
1021         struct iwl_mvm_tcm_mac *mdata;
1022
1023         if (mac >= NUM_MAC_INDEX_DRIVER)
1024                 return;
1025
1026         mdata = &mvm->tcm.data[mac];
1027
1028         if (mvm->tcm.paused)
1029                 return;
1030
1031         if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD))
1032                 schedule_delayed_work(&mvm->tcm.work, 0);
1033
1034         mdata->tx.airtime += airtime;
1035 }
1036
1037 static int iwl_mvm_tx_pkt_queued(struct iwl_mvm *mvm,
1038                                  struct iwl_mvm_sta *mvmsta, int tid)
1039 {
1040         u32 ac = tid_to_mac80211_ac[tid];
1041         int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
1042         struct iwl_mvm_tcm_mac *mdata;
1043
1044         if (mac >= NUM_MAC_INDEX_DRIVER)
1045                 return -EINVAL;
1046
1047         mdata = &mvm->tcm.data[mac];
1048
1049         mdata->tx.pkts[ac]++;
1050
1051         return 0;
1052 }
1053
1054 /*
1055  * Sets the fields in the Tx cmd that are crypto related.
1056  *
1057  * This function must be called with BHs disabled.
1058  */
1059 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb,
1060                            struct ieee80211_tx_info *info,
1061                            struct ieee80211_sta *sta)
1062 {
1063         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1064         struct iwl_mvm_sta *mvmsta;
1065         struct iwl_device_tx_cmd *dev_cmd;
1066         __le16 fc;
1067         u16 seq_number = 0;
1068         u8 tid = IWL_MAX_TID_COUNT;
1069         u16 txq_id;
1070         bool is_ampdu = false;
1071         int hdrlen;
1072
1073         mvmsta = iwl_mvm_sta_from_mac80211(sta);
1074         fc = hdr->frame_control;
1075         hdrlen = ieee80211_hdrlen(fc);
1076
1077         if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc))
1078                 return -1;
1079
1080         if (WARN_ON_ONCE(!mvmsta))
1081                 return -1;
1082
1083         if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA))
1084                 return -1;
1085
1086         if (unlikely(ieee80211_is_any_nullfunc(fc)) && sta->he_cap.has_he)
1087                 return -1;
1088
1089         if (unlikely(ieee80211_is_probe_resp(fc)))
1090                 iwl_mvm_probe_resp_set_noa(mvm, skb);
1091
1092         dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen,
1093                                         sta, mvmsta->sta_id);
1094         if (!dev_cmd)
1095                 goto drop;
1096
1097         /*
1098          * we handle that entirely ourselves -- for uAPSD the firmware
1099          * will always send a notification, and for PS-Poll responses
1100          * we'll notify mac80211 when getting frame status
1101          */
1102         info->flags &= ~IEEE80211_TX_STATUS_EOSP;
1103
1104         spin_lock(&mvmsta->lock);
1105
1106         /* nullfunc frames should go to the MGMT queue regardless of QOS,
1107          * the condition of !ieee80211_is_qos_nullfunc(fc) keeps the default
1108          * assignment of MGMT TID
1109          */
1110         if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
1111                 tid = ieee80211_get_tid(hdr);
1112                 if (WARN_ONCE(tid >= IWL_MAX_TID_COUNT, "Invalid TID %d", tid))
1113                         goto drop_unlock_sta;
1114
1115                 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU;
1116                 if (WARN_ONCE(is_ampdu &&
1117                               mvmsta->tid_data[tid].state != IWL_AGG_ON,
1118                               "Invalid internal agg state %d for TID %d",
1119                                mvmsta->tid_data[tid].state, tid))
1120                         goto drop_unlock_sta;
1121
1122                 seq_number = mvmsta->tid_data[tid].seq_number;
1123                 seq_number &= IEEE80211_SCTL_SEQ;
1124
1125                 if (!iwl_mvm_has_new_tx_api(mvm)) {
1126                         struct iwl_tx_cmd *tx_cmd = (void *)dev_cmd->payload;
1127
1128                         hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
1129                         hdr->seq_ctrl |= cpu_to_le16(seq_number);
1130                         /* update the tx_cmd hdr as it was already copied */
1131                         tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl;
1132                 }
1133         } else if (ieee80211_is_data(fc) && !ieee80211_is_data_qos(fc)) {
1134                 tid = IWL_TID_NON_QOS;
1135         }
1136
1137         txq_id = mvmsta->tid_data[tid].txq_id;
1138
1139         WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
1140
1141         if (WARN_ONCE(txq_id == IWL_MVM_INVALID_QUEUE, "Invalid TXQ id")) {
1142                 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1143                 spin_unlock(&mvmsta->lock);
1144                 return -1;
1145         }
1146
1147         if (!iwl_mvm_has_new_tx_api(mvm)) {
1148                 /* Keep track of the time of the last frame for this RA/TID */
1149                 mvm->queue_info[txq_id].last_frame_time[tid] = jiffies;
1150
1151                 /*
1152                  * If we have timed-out TIDs - schedule the worker that will
1153                  * reconfig the queues and update them
1154                  *
1155                  * Note that the no lock is taken here in order to not serialize
1156                  * the TX flow. This isn't dangerous because scheduling
1157                  * mvm->add_stream_wk can't ruin the state, and if we DON'T
1158                  * schedule it due to some race condition then next TX we get
1159                  * here we will.
1160                  */
1161                 if (unlikely(mvm->queue_info[txq_id].status ==
1162                              IWL_MVM_QUEUE_SHARED &&
1163                              iwl_mvm_txq_should_update(mvm, txq_id)))
1164                         schedule_work(&mvm->add_stream_wk);
1165         }
1166
1167         IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x len %d\n",
1168                      mvmsta->sta_id, tid, txq_id,
1169                      IEEE80211_SEQ_TO_SN(seq_number), skb->len);
1170
1171         /* From now on, we cannot access info->control */
1172         iwl_mvm_skb_prepare_status(skb, dev_cmd);
1173
1174         if (ieee80211_is_data(fc))
1175                 iwl_mvm_mei_tx_copy_to_csme(mvm, skb,
1176                                             info->control.hw_key ?
1177                                             info->control.hw_key->iv_len : 0);
1178
1179         if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id))
1180                 goto drop_unlock_sta;
1181
1182         if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc))
1183                 mvmsta->tid_data[tid].seq_number = seq_number + 0x10;
1184
1185         spin_unlock(&mvmsta->lock);
1186
1187         if (iwl_mvm_tx_pkt_queued(mvm, mvmsta,
1188                                   tid == IWL_MAX_TID_COUNT ? 0 : tid))
1189                 goto drop;
1190
1191         return 0;
1192
1193 drop_unlock_sta:
1194         iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1195         spin_unlock(&mvmsta->lock);
1196 drop:
1197         IWL_DEBUG_TX(mvm, "TX to [%d|%d] dropped\n", mvmsta->sta_id, tid);
1198         return -1;
1199 }
1200
1201 int iwl_mvm_tx_skb_sta(struct iwl_mvm *mvm, struct sk_buff *skb,
1202                        struct ieee80211_sta *sta)
1203 {
1204         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1205         struct ieee80211_tx_info info;
1206         struct sk_buff_head mpdus_skbs;
1207         unsigned int payload_len;
1208         int ret;
1209
1210         if (WARN_ON_ONCE(!mvmsta))
1211                 return -1;
1212
1213         if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA))
1214                 return -1;
1215
1216         memcpy(&info, skb->cb, sizeof(info));
1217
1218         if (!skb_is_gso(skb))
1219                 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1220
1221         payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
1222                 tcp_hdrlen(skb) + skb->data_len;
1223
1224         if (payload_len <= skb_shinfo(skb)->gso_size)
1225                 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1226
1227         __skb_queue_head_init(&mpdus_skbs);
1228
1229         ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs);
1230         if (ret)
1231                 return ret;
1232
1233         if (WARN_ON(skb_queue_empty(&mpdus_skbs)))
1234                 return ret;
1235
1236         while (!skb_queue_empty(&mpdus_skbs)) {
1237                 skb = __skb_dequeue(&mpdus_skbs);
1238
1239                 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1240                 if (ret) {
1241                         __skb_queue_purge(&mpdus_skbs);
1242                         return ret;
1243                 }
1244         }
1245
1246         return 0;
1247 }
1248
1249 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm,
1250                                       struct ieee80211_sta *sta, u8 tid)
1251 {
1252         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1253         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1254         struct ieee80211_vif *vif = mvmsta->vif;
1255         u16 normalized_ssn;
1256
1257         lockdep_assert_held(&mvmsta->lock);
1258
1259         if ((tid_data->state == IWL_AGG_ON ||
1260              tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) &&
1261             iwl_mvm_tid_queued(mvm, tid_data) == 0) {
1262                 /*
1263                  * Now that this aggregation or DQA queue is empty tell
1264                  * mac80211 so it knows we no longer have frames buffered for
1265                  * the station on this TID (for the TIM bitmap calculation.)
1266                  */
1267                 ieee80211_sta_set_buffered(sta, tid, false);
1268         }
1269
1270         /*
1271          * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
1272          * to align the wrap around of ssn so we compare relevant values.
1273          */
1274         normalized_ssn = tid_data->ssn;
1275         if (mvm->trans->trans_cfg->gen2)
1276                 normalized_ssn &= 0xff;
1277
1278         if (normalized_ssn != tid_data->next_reclaimed)
1279                 return;
1280
1281         switch (tid_data->state) {
1282         case IWL_EMPTYING_HW_QUEUE_ADDBA:
1283                 IWL_DEBUG_TX_QUEUES(mvm,
1284                                     "Can continue addBA flow ssn = next_recl = %d\n",
1285                                     tid_data->next_reclaimed);
1286                 tid_data->state = IWL_AGG_STARTING;
1287                 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1288                 break;
1289
1290         case IWL_EMPTYING_HW_QUEUE_DELBA:
1291                 IWL_DEBUG_TX_QUEUES(mvm,
1292                                     "Can continue DELBA flow ssn = next_recl = %d\n",
1293                                     tid_data->next_reclaimed);
1294                 tid_data->state = IWL_AGG_OFF;
1295                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1296                 break;
1297
1298         default:
1299                 break;
1300         }
1301 }
1302
1303 #ifdef CONFIG_IWLWIFI_DEBUG
1304 const char *iwl_mvm_get_tx_fail_reason(u32 status)
1305 {
1306 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
1307 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
1308
1309         switch (status & TX_STATUS_MSK) {
1310         case TX_STATUS_SUCCESS:
1311                 return "SUCCESS";
1312         TX_STATUS_POSTPONE(DELAY);
1313         TX_STATUS_POSTPONE(FEW_BYTES);
1314         TX_STATUS_POSTPONE(BT_PRIO);
1315         TX_STATUS_POSTPONE(QUIET_PERIOD);
1316         TX_STATUS_POSTPONE(CALC_TTAK);
1317         TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
1318         TX_STATUS_FAIL(SHORT_LIMIT);
1319         TX_STATUS_FAIL(LONG_LIMIT);
1320         TX_STATUS_FAIL(UNDERRUN);
1321         TX_STATUS_FAIL(DRAIN_FLOW);
1322         TX_STATUS_FAIL(RFKILL_FLUSH);
1323         TX_STATUS_FAIL(LIFE_EXPIRE);
1324         TX_STATUS_FAIL(DEST_PS);
1325         TX_STATUS_FAIL(HOST_ABORTED);
1326         TX_STATUS_FAIL(BT_RETRY);
1327         TX_STATUS_FAIL(STA_INVALID);
1328         TX_STATUS_FAIL(FRAG_DROPPED);
1329         TX_STATUS_FAIL(TID_DISABLE);
1330         TX_STATUS_FAIL(FIFO_FLUSHED);
1331         TX_STATUS_FAIL(SMALL_CF_POLL);
1332         TX_STATUS_FAIL(FW_DROP);
1333         TX_STATUS_FAIL(STA_COLOR_MISMATCH);
1334         }
1335
1336         return "UNKNOWN";
1337
1338 #undef TX_STATUS_FAIL
1339 #undef TX_STATUS_POSTPONE
1340 }
1341 #endif /* CONFIG_IWLWIFI_DEBUG */
1342
1343 static int iwl_mvm_get_hwrate_chan_width(u32 chan_width)
1344 {
1345         switch (chan_width) {
1346         case RATE_MCS_CHAN_WIDTH_20:
1347                 return 0;
1348         case RATE_MCS_CHAN_WIDTH_40:
1349                 return IEEE80211_TX_RC_40_MHZ_WIDTH;
1350         case RATE_MCS_CHAN_WIDTH_80:
1351                 return IEEE80211_TX_RC_80_MHZ_WIDTH;
1352         case RATE_MCS_CHAN_WIDTH_160:
1353                 return IEEE80211_TX_RC_160_MHZ_WIDTH;
1354         default:
1355                 return 0;
1356         }
1357 }
1358
1359 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags,
1360                                enum nl80211_band band,
1361                                struct ieee80211_tx_rate *r)
1362 {
1363         u32 format = rate_n_flags & RATE_MCS_MOD_TYPE_MSK;
1364         u32 rate = format == RATE_MCS_HT_MSK ?
1365                 RATE_HT_MCS_INDEX(rate_n_flags) :
1366                 rate_n_flags & RATE_MCS_CODE_MSK;
1367
1368         r->flags |=
1369                 iwl_mvm_get_hwrate_chan_width(rate_n_flags &
1370                                               RATE_MCS_CHAN_WIDTH_MSK);
1371
1372         if (rate_n_flags & RATE_MCS_SGI_MSK)
1373                 r->flags |= IEEE80211_TX_RC_SHORT_GI;
1374         if (format ==  RATE_MCS_HT_MSK) {
1375                 r->flags |= IEEE80211_TX_RC_MCS;
1376                 r->idx = rate;
1377         } else if (format ==  RATE_MCS_VHT_MSK) {
1378                 ieee80211_rate_set_vht(r, rate,
1379                                        ((rate_n_flags & RATE_MCS_NSS_MSK) >>
1380                                         RATE_MCS_NSS_POS) + 1);
1381                 r->flags |= IEEE80211_TX_RC_VHT_MCS;
1382         } else if (format == RATE_MCS_HE_MSK) {
1383                 /* mac80211 cannot do this without ieee80211_tx_status_ext()
1384                  * but it only matters for radiotap */
1385                 r->idx = 0;
1386         } else {
1387                 r->idx = iwl_mvm_legacy_hw_idx_to_mac80211_idx(rate_n_flags,
1388                                                                band);
1389         }
1390 }
1391
1392 void iwl_mvm_hwrate_to_tx_rate_v1(u32 rate_n_flags,
1393                                   enum nl80211_band band,
1394                                   struct ieee80211_tx_rate *r)
1395 {
1396         if (rate_n_flags & RATE_HT_MCS_GF_MSK)
1397                 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
1398
1399         r->flags |=
1400                 iwl_mvm_get_hwrate_chan_width(rate_n_flags &
1401                                               RATE_MCS_CHAN_WIDTH_MSK_V1);
1402
1403         if (rate_n_flags & RATE_MCS_SGI_MSK_V1)
1404                 r->flags |= IEEE80211_TX_RC_SHORT_GI;
1405         if (rate_n_flags & RATE_MCS_HT_MSK_V1) {
1406                 r->flags |= IEEE80211_TX_RC_MCS;
1407                 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK_V1;
1408         } else if (rate_n_flags & RATE_MCS_VHT_MSK_V1) {
1409                 ieee80211_rate_set_vht(
1410                         r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK,
1411                         ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
1412                                                 RATE_VHT_MCS_NSS_POS) + 1);
1413                 r->flags |= IEEE80211_TX_RC_VHT_MCS;
1414         } else {
1415                 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
1416                                                              band);
1417         }
1418 }
1419
1420 /*
1421  * translate ucode response to mac80211 tx status control values
1422  */
1423 static void iwl_mvm_hwrate_to_tx_status(const struct iwl_fw *fw,
1424                                         u32 rate_n_flags,
1425                                         struct ieee80211_tx_info *info)
1426 {
1427         struct ieee80211_tx_rate *r = &info->status.rates[0];
1428
1429         if (iwl_fw_lookup_notif_ver(fw, LONG_GROUP,
1430                                     TX_CMD, 0) <= 6)
1431                 rate_n_flags = iwl_new_rate_from_v1(rate_n_flags);
1432
1433         info->status.antenna =
1434                 ((rate_n_flags & RATE_MCS_ANT_AB_MSK) >> RATE_MCS_ANT_POS);
1435         iwl_mvm_hwrate_to_tx_rate(rate_n_flags,
1436                                   info->band, r);
1437 }
1438
1439 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm,
1440                                             u32 status, __le16 frame_control)
1441 {
1442         struct iwl_fw_dbg_trigger_tlv *trig;
1443         struct iwl_fw_dbg_trigger_tx_status *status_trig;
1444         int i;
1445
1446         if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS) {
1447                 enum iwl_fw_ini_time_point tp =
1448                         IWL_FW_INI_TIME_POINT_TX_FAILED;
1449
1450                 if (ieee80211_is_action(frame_control))
1451                         tp = IWL_FW_INI_TIME_POINT_TX_WFD_ACTION_FRAME_FAILED;
1452
1453                 iwl_dbg_tlv_time_point(&mvm->fwrt,
1454                                        tp, NULL);
1455                 return;
1456         }
1457
1458         trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL,
1459                                      FW_DBG_TRIGGER_TX_STATUS);
1460         if (!trig)
1461                 return;
1462
1463         status_trig = (void *)trig->data;
1464
1465         for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) {
1466                 /* don't collect on status 0 */
1467                 if (!status_trig->statuses[i].status)
1468                         break;
1469
1470                 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK))
1471                         continue;
1472
1473                 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
1474                                         "Tx status %d was received",
1475                                         status & TX_STATUS_MSK);
1476                 break;
1477         }
1478 }
1479
1480 /*
1481  * iwl_mvm_get_scd_ssn - returns the SSN of the SCD
1482  * @tx_resp: the Tx response from the fw (agg or non-agg)
1483  *
1484  * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since
1485  * it can't know that everything will go well until the end of the AMPDU, it
1486  * can't know in advance the number of MPDUs that will be sent in the current
1487  * batch. This is why it writes the agg Tx response while it fetches the MPDUs.
1488  * Hence, it can't know in advance what the SSN of the SCD will be at the end
1489  * of the batch. This is why the SSN of the SCD is written at the end of the
1490  * whole struct at a variable offset. This function knows how to cope with the
1491  * variable offset and returns the SSN of the SCD.
1492  */
1493 static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm,
1494                                       struct iwl_mvm_tx_resp *tx_resp)
1495 {
1496         return le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) +
1497                             tx_resp->frame_count) & 0xfff;
1498 }
1499
1500 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm,
1501                                      struct iwl_rx_packet *pkt)
1502 {
1503         struct ieee80211_sta *sta;
1504         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1505         int txq_id = SEQ_TO_QUEUE(sequence);
1506         /* struct iwl_mvm_tx_resp_v3 is almost the same */
1507         struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1508         int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1509         int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1510         struct agg_tx_status *agg_status =
1511                 iwl_mvm_get_agg_status(mvm, tx_resp);
1512         u32 status = le16_to_cpu(agg_status->status);
1513         u16 ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp);
1514         struct sk_buff_head skbs;
1515         u8 skb_freed = 0;
1516         u8 lq_color;
1517         u16 next_reclaimed, seq_ctl;
1518         bool is_ndp = false;
1519
1520         __skb_queue_head_init(&skbs);
1521
1522         if (iwl_mvm_has_new_tx_api(mvm))
1523                 txq_id = le16_to_cpu(tx_resp->tx_queue);
1524
1525         seq_ctl = le16_to_cpu(tx_resp->seq_ctl);
1526
1527         /* we can free until ssn % q.n_bd not inclusive */
1528         iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs);
1529
1530         while (!skb_queue_empty(&skbs)) {
1531                 struct sk_buff *skb = __skb_dequeue(&skbs);
1532                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1533                 struct ieee80211_hdr *hdr = (void *)skb->data;
1534                 bool flushed = false;
1535
1536                 skb_freed++;
1537
1538                 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1539
1540                 memset(&info->status, 0, sizeof(info->status));
1541
1542                 /* inform mac80211 about what happened with the frame */
1543                 switch (status & TX_STATUS_MSK) {
1544                 case TX_STATUS_SUCCESS:
1545                 case TX_STATUS_DIRECT_DONE:
1546                         info->flags |= IEEE80211_TX_STAT_ACK;
1547                         break;
1548                 case TX_STATUS_FAIL_FIFO_FLUSHED:
1549                 case TX_STATUS_FAIL_DRAIN_FLOW:
1550                         flushed = true;
1551                         break;
1552                 case TX_STATUS_FAIL_DEST_PS:
1553                         /* the FW should have stopped the queue and not
1554                          * return this status
1555                          */
1556                         IWL_ERR_LIMIT(mvm,
1557                                       "FW reported TX filtered, status=0x%x, FC=0x%x\n",
1558                                       status, le16_to_cpu(hdr->frame_control));
1559                         info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
1560                         break;
1561                 default:
1562                         break;
1563                 }
1564
1565                 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS &&
1566                     ieee80211_is_mgmt(hdr->frame_control))
1567                         iwl_mvm_toggle_tx_ant(mvm, &mvm->mgmt_last_antenna_idx);
1568
1569                 /*
1570                  * If we are freeing multiple frames, mark all the frames
1571                  * but the first one as acked, since they were acknowledged
1572                  * before
1573                  * */
1574                 if (skb_freed > 1)
1575                         info->flags |= IEEE80211_TX_STAT_ACK;
1576
1577                 iwl_mvm_tx_status_check_trigger(mvm, status, hdr->frame_control);
1578
1579                 info->status.rates[0].count = tx_resp->failure_frame + 1;
1580
1581                 iwl_mvm_hwrate_to_tx_status(mvm->fw,
1582                                             le32_to_cpu(tx_resp->initial_rate),
1583                                             info);
1584
1585                 /* Don't assign the converted initial_rate, because driver
1586                  * TLC uses this and doesn't support the new FW rate
1587                  */
1588                 info->status.status_driver_data[1] =
1589                         (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate);
1590
1591                 /* Single frame failure in an AMPDU queue => send BAR */
1592                 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
1593                     !(info->flags & IEEE80211_TX_STAT_ACK) &&
1594                     !(info->flags & IEEE80211_TX_STAT_TX_FILTERED) && !flushed)
1595                         info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1596                 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1597
1598                 /* W/A FW bug: seq_ctl is wrong upon failure / BAR frame */
1599                 if (ieee80211_is_back_req(hdr->frame_control))
1600                         seq_ctl = 0;
1601                 else if (status != TX_STATUS_SUCCESS)
1602                         seq_ctl = le16_to_cpu(hdr->seq_ctrl);
1603
1604                 if (unlikely(!seq_ctl)) {
1605                         struct ieee80211_hdr *hdr = (void *)skb->data;
1606
1607                         /*
1608                          * If it is an NDP, we can't update next_reclaim since
1609                          * its sequence control is 0. Note that for that same
1610                          * reason, NDPs are never sent to A-MPDU'able queues
1611                          * so that we can never have more than one freed frame
1612                          * for a single Tx resonse (see WARN_ON below).
1613                          */
1614                         if (ieee80211_is_qos_nullfunc(hdr->frame_control))
1615                                 is_ndp = true;
1616                 }
1617
1618                 /*
1619                  * TODO: this is not accurate if we are freeing more than one
1620                  * packet.
1621                  */
1622                 info->status.tx_time =
1623                         le16_to_cpu(tx_resp->wireless_media_time);
1624                 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1);
1625                 lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info);
1626                 info->status.status_driver_data[0] =
1627                         RS_DRV_DATA_PACK(lq_color, tx_resp->reduced_tpc);
1628
1629                 ieee80211_tx_status(mvm->hw, skb);
1630         }
1631
1632         /* This is an aggregation queue or might become one, so we use
1633          * the ssn since: ssn = wifi seq_num % 256.
1634          * The seq_ctl is the sequence control of the packet to which
1635          * this Tx response relates. But if there is a hole in the
1636          * bitmap of the BA we received, this Tx response may allow to
1637          * reclaim the hole and all the subsequent packets that were
1638          * already acked. In that case, seq_ctl != ssn, and the next
1639          * packet to be reclaimed will be ssn and not seq_ctl. In that
1640          * case, several packets will be reclaimed even if
1641          * frame_count = 1.
1642          *
1643          * The ssn is the index (% 256) of the latest packet that has
1644          * treated (acked / dropped) + 1.
1645          */
1646         next_reclaimed = ssn;
1647
1648         IWL_DEBUG_TX_REPLY(mvm,
1649                            "TXQ %d status %s (0x%08x)\n",
1650                            txq_id, iwl_mvm_get_tx_fail_reason(status), status);
1651
1652         IWL_DEBUG_TX_REPLY(mvm,
1653                            "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
1654                            le32_to_cpu(tx_resp->initial_rate),
1655                            tx_resp->failure_frame, SEQ_TO_INDEX(sequence),
1656                            ssn, next_reclaimed, seq_ctl);
1657
1658         rcu_read_lock();
1659
1660         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1661         /*
1662          * sta can't be NULL otherwise it'd mean that the sta has been freed in
1663          * the firmware while we still have packets for it in the Tx queues.
1664          */
1665         if (WARN_ON_ONCE(!sta))
1666                 goto out;
1667
1668         if (!IS_ERR(sta)) {
1669                 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1670
1671                 iwl_mvm_tx_airtime(mvm, mvmsta,
1672                                    le16_to_cpu(tx_resp->wireless_media_time));
1673
1674                 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS &&
1675                     mvmsta->sta_state < IEEE80211_STA_AUTHORIZED)
1676                         iwl_mvm_toggle_tx_ant(mvm, &mvmsta->tx_ant);
1677
1678                 if (sta->wme && tid != IWL_MGMT_TID) {
1679                         struct iwl_mvm_tid_data *tid_data =
1680                                 &mvmsta->tid_data[tid];
1681                         bool send_eosp_ndp = false;
1682
1683                         spin_lock_bh(&mvmsta->lock);
1684
1685                         if (!is_ndp) {
1686                                 tid_data->next_reclaimed = next_reclaimed;
1687                                 IWL_DEBUG_TX_REPLY(mvm,
1688                                                    "Next reclaimed packet:%d\n",
1689                                                    next_reclaimed);
1690                         } else {
1691                                 IWL_DEBUG_TX_REPLY(mvm,
1692                                                    "NDP - don't update next_reclaimed\n");
1693                         }
1694
1695                         iwl_mvm_check_ratid_empty(mvm, sta, tid);
1696
1697                         if (mvmsta->sleep_tx_count) {
1698                                 mvmsta->sleep_tx_count--;
1699                                 if (mvmsta->sleep_tx_count &&
1700                                     !iwl_mvm_tid_queued(mvm, tid_data)) {
1701                                         /*
1702                                          * The number of frames in the queue
1703                                          * dropped to 0 even if we sent less
1704                                          * frames than we thought we had on the
1705                                          * Tx queue.
1706                                          * This means we had holes in the BA
1707                                          * window that we just filled, ask
1708                                          * mac80211 to send EOSP since the
1709                                          * firmware won't know how to do that.
1710                                          * Send NDP and the firmware will send
1711                                          * EOSP notification that will trigger
1712                                          * a call to ieee80211_sta_eosp().
1713                                          */
1714                                         send_eosp_ndp = true;
1715                                 }
1716                         }
1717
1718                         spin_unlock_bh(&mvmsta->lock);
1719                         if (send_eosp_ndp) {
1720                                 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta,
1721                                         IEEE80211_FRAME_RELEASE_UAPSD,
1722                                         1, tid, false, false);
1723                                 mvmsta->sleep_tx_count = 0;
1724                                 ieee80211_send_eosp_nullfunc(sta, tid);
1725                         }
1726                 }
1727
1728                 if (mvmsta->next_status_eosp) {
1729                         mvmsta->next_status_eosp = false;
1730                         ieee80211_sta_eosp(sta);
1731                 }
1732         }
1733 out:
1734         rcu_read_unlock();
1735 }
1736
1737 #ifdef CONFIG_IWLWIFI_DEBUG
1738 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
1739 static const char *iwl_get_agg_tx_status(u16 status)
1740 {
1741         switch (status & AGG_TX_STATE_STATUS_MSK) {
1742         AGG_TX_STATE_(TRANSMITTED);
1743         AGG_TX_STATE_(UNDERRUN);
1744         AGG_TX_STATE_(BT_PRIO);
1745         AGG_TX_STATE_(FEW_BYTES);
1746         AGG_TX_STATE_(ABORT);
1747         AGG_TX_STATE_(TX_ON_AIR_DROP);
1748         AGG_TX_STATE_(LAST_SENT_TRY_CNT);
1749         AGG_TX_STATE_(LAST_SENT_BT_KILL);
1750         AGG_TX_STATE_(SCD_QUERY);
1751         AGG_TX_STATE_(TEST_BAD_CRC32);
1752         AGG_TX_STATE_(RESPONSE);
1753         AGG_TX_STATE_(DUMP_TX);
1754         AGG_TX_STATE_(DELAY_TX);
1755         }
1756
1757         return "UNKNOWN";
1758 }
1759
1760 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1761                                       struct iwl_rx_packet *pkt)
1762 {
1763         struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1764         struct agg_tx_status *frame_status =
1765                 iwl_mvm_get_agg_status(mvm, tx_resp);
1766         int i;
1767         bool tirgger_timepoint = false;
1768
1769         for (i = 0; i < tx_resp->frame_count; i++) {
1770                 u16 fstatus = le16_to_cpu(frame_status[i].status);
1771                 /* In case one frame wasn't transmitted trigger time point */
1772                 tirgger_timepoint |= ((fstatus & AGG_TX_STATE_STATUS_MSK) !=
1773                                       AGG_TX_STATE_TRANSMITTED);
1774                 IWL_DEBUG_TX_REPLY(mvm,
1775                                    "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
1776                                    iwl_get_agg_tx_status(fstatus),
1777                                    fstatus & AGG_TX_STATE_STATUS_MSK,
1778                                    (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >>
1779                                         AGG_TX_STATE_TRY_CNT_POS,
1780                                    le16_to_cpu(frame_status[i].sequence));
1781         }
1782
1783         if (tirgger_timepoint)
1784                 iwl_dbg_tlv_time_point(&mvm->fwrt,
1785                                        IWL_FW_INI_TIME_POINT_TX_FAILED, NULL);
1786
1787 }
1788 #else
1789 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1790                                       struct iwl_rx_packet *pkt)
1791 {}
1792 #endif /* CONFIG_IWLWIFI_DEBUG */
1793
1794 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm,
1795                                   struct iwl_rx_packet *pkt)
1796 {
1797         struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1798         int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1799         int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1800         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1801         struct iwl_mvm_sta *mvmsta;
1802         int queue = SEQ_TO_QUEUE(sequence);
1803         struct ieee80211_sta *sta;
1804
1805         if (WARN_ON_ONCE(queue < IWL_MVM_DQA_MIN_DATA_QUEUE &&
1806                          (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)))
1807                 return;
1808
1809         iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt);
1810
1811         rcu_read_lock();
1812
1813         mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1814
1815         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1816         if (WARN_ON_ONCE(!sta || !sta->wme)) {
1817                 rcu_read_unlock();
1818                 return;
1819         }
1820
1821         if (!WARN_ON_ONCE(!mvmsta)) {
1822                 mvmsta->tid_data[tid].rate_n_flags =
1823                         le32_to_cpu(tx_resp->initial_rate);
1824                 mvmsta->tid_data[tid].tx_time =
1825                         le16_to_cpu(tx_resp->wireless_media_time);
1826                 mvmsta->tid_data[tid].lq_color =
1827                         TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info);
1828                 iwl_mvm_tx_airtime(mvm, mvmsta,
1829                                    le16_to_cpu(tx_resp->wireless_media_time));
1830         }
1831
1832         rcu_read_unlock();
1833 }
1834
1835 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1836 {
1837         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1838         struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1839
1840         if (tx_resp->frame_count == 1)
1841                 iwl_mvm_rx_tx_cmd_single(mvm, pkt);
1842         else
1843                 iwl_mvm_rx_tx_cmd_agg(mvm, pkt);
1844 }
1845
1846 static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid,
1847                                int txq, int index,
1848                                struct ieee80211_tx_info *tx_info, u32 rate,
1849                                bool is_flush)
1850 {
1851         struct sk_buff_head reclaimed_skbs;
1852         struct iwl_mvm_tid_data *tid_data = NULL;
1853         struct ieee80211_sta *sta;
1854         struct iwl_mvm_sta *mvmsta = NULL;
1855         struct sk_buff *skb;
1856         int freed;
1857
1858         if (WARN_ONCE(sta_id >= mvm->fw->ucode_capa.num_stations ||
1859                       tid > IWL_MAX_TID_COUNT,
1860                       "sta_id %d tid %d", sta_id, tid))
1861                 return;
1862
1863         rcu_read_lock();
1864
1865         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1866
1867         /* Reclaiming frames for a station that has been deleted ? */
1868         if (WARN_ON_ONCE(!sta)) {
1869                 rcu_read_unlock();
1870                 return;
1871         }
1872
1873         __skb_queue_head_init(&reclaimed_skbs);
1874
1875         /*
1876          * Release all TFDs before the SSN, i.e. all TFDs in front of
1877          * block-ack window (we assume that they've been successfully
1878          * transmitted ... if not, it's too late anyway).
1879          */
1880         iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs);
1881
1882         skb_queue_walk(&reclaimed_skbs, skb) {
1883                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1884
1885                 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1886
1887                 memset(&info->status, 0, sizeof(info->status));
1888                 /* Packet was transmitted successfully, failures come as single
1889                  * frames because before failing a frame the firmware transmits
1890                  * it without aggregation at least once.
1891                  */
1892                 if (!is_flush)
1893                         info->flags |= IEEE80211_TX_STAT_ACK;
1894         }
1895
1896         /*
1897          * It's possible to get a BA response after invalidating the rcu (rcu is
1898          * invalidated in order to prevent new Tx from being sent, but there may
1899          * be some frames already in-flight).
1900          * In this case we just want to reclaim, and could skip all the
1901          * sta-dependent stuff since it's in the middle of being removed
1902          * anyways.
1903          */
1904         if (IS_ERR(sta))
1905                 goto out;
1906
1907         mvmsta = iwl_mvm_sta_from_mac80211(sta);
1908         tid_data = &mvmsta->tid_data[tid];
1909
1910         if (tid_data->txq_id != txq) {
1911                 IWL_ERR(mvm,
1912                         "invalid reclaim request: Q %d, tid %d\n",
1913                         tid_data->txq_id, tid);
1914                 rcu_read_unlock();
1915                 return;
1916         }
1917
1918         spin_lock_bh(&mvmsta->lock);
1919
1920         tid_data->next_reclaimed = index;
1921
1922         iwl_mvm_check_ratid_empty(mvm, sta, tid);
1923
1924         freed = 0;
1925
1926         /* pack lq color from tid_data along the reduced txp */
1927         tx_info->status.status_driver_data[0] =
1928                 RS_DRV_DATA_PACK(tid_data->lq_color,
1929                                  tx_info->status.status_driver_data[0]);
1930         tx_info->status.status_driver_data[1] = (void *)(uintptr_t)rate;
1931
1932         skb_queue_walk(&reclaimed_skbs, skb) {
1933                 struct ieee80211_hdr *hdr = (void *)skb->data;
1934                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1935
1936                 if (!is_flush) {
1937                         if (ieee80211_is_data_qos(hdr->frame_control))
1938                                 freed++;
1939                         else
1940                                 WARN_ON_ONCE(tid != IWL_MAX_TID_COUNT);
1941                 }
1942
1943                 /* this is the first skb we deliver in this batch */
1944                 /* put the rate scaling data there */
1945                 if (freed == 1) {
1946                         info->flags |= IEEE80211_TX_STAT_AMPDU;
1947                         memcpy(&info->status, &tx_info->status,
1948                                sizeof(tx_info->status));
1949                         iwl_mvm_hwrate_to_tx_status(mvm->fw, rate, info);
1950                 }
1951         }
1952
1953         spin_unlock_bh(&mvmsta->lock);
1954
1955         /* We got a BA notif with 0 acked or scd_ssn didn't progress which is
1956          * possible (i.e. first MPDU in the aggregation wasn't acked)
1957          * Still it's important to update RS about sent vs. acked.
1958          */
1959         if (!is_flush && skb_queue_empty(&reclaimed_skbs)) {
1960                 struct ieee80211_chanctx_conf *chanctx_conf = NULL;
1961
1962                 if (mvmsta->vif)
1963                         chanctx_conf =
1964                                 rcu_dereference(mvmsta->vif->chanctx_conf);
1965
1966                 if (WARN_ON_ONCE(!chanctx_conf))
1967                         goto out;
1968
1969                 tx_info->band = chanctx_conf->def.chan->band;
1970                 iwl_mvm_hwrate_to_tx_status(mvm->fw, rate, tx_info);
1971
1972                 if (!iwl_mvm_has_tlc_offload(mvm)) {
1973                         IWL_DEBUG_TX_REPLY(mvm,
1974                                            "No reclaim. Update rs directly\n");
1975                         iwl_mvm_rs_tx_status(mvm, sta, tid, tx_info, false);
1976                 }
1977         }
1978
1979 out:
1980         rcu_read_unlock();
1981
1982         while (!skb_queue_empty(&reclaimed_skbs)) {
1983                 skb = __skb_dequeue(&reclaimed_skbs);
1984                 ieee80211_tx_status(mvm->hw, skb);
1985         }
1986 }
1987
1988 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1989 {
1990         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1991         unsigned int pkt_len = iwl_rx_packet_payload_len(pkt);
1992         int sta_id, tid, txq, index;
1993         struct ieee80211_tx_info ba_info = {};
1994         struct iwl_mvm_ba_notif *ba_notif;
1995         struct iwl_mvm_tid_data *tid_data;
1996         struct iwl_mvm_sta *mvmsta;
1997
1998         ba_info.flags = IEEE80211_TX_STAT_AMPDU;
1999
2000         if (iwl_mvm_has_new_tx_api(mvm)) {
2001                 struct iwl_mvm_compressed_ba_notif *ba_res =
2002                         (void *)pkt->data;
2003                 u8 lq_color = TX_RES_RATE_TABLE_COL_GET(ba_res->tlc_rate_info);
2004                 u16 tfd_cnt;
2005                 int i;
2006
2007                 if (unlikely(sizeof(*ba_res) > pkt_len))
2008                         return;
2009
2010                 sta_id = ba_res->sta_id;
2011                 ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done);
2012                 ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed);
2013                 ba_info.status.tx_time =
2014                         (u16)le32_to_cpu(ba_res->wireless_time);
2015                 ba_info.status.status_driver_data[0] =
2016                         (void *)(uintptr_t)ba_res->reduced_txp;
2017
2018                 tfd_cnt = le16_to_cpu(ba_res->tfd_cnt);
2019                 if (!tfd_cnt || struct_size(ba_res, tfd, tfd_cnt) > pkt_len)
2020                         return;
2021
2022                 rcu_read_lock();
2023
2024                 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
2025                 /*
2026                  * It's possible to get a BA response after invalidating the rcu
2027                  * (rcu is invalidated in order to prevent new Tx from being
2028                  * sent, but there may be some frames already in-flight).
2029                  * In this case we just want to reclaim, and could skip all the
2030                  * sta-dependent stuff since it's in the middle of being removed
2031                  * anyways.
2032                  */
2033
2034                 /* Free per TID */
2035                 for (i = 0; i < tfd_cnt; i++) {
2036                         struct iwl_mvm_compressed_ba_tfd *ba_tfd =
2037                                 &ba_res->tfd[i];
2038
2039                         tid = ba_tfd->tid;
2040                         if (tid == IWL_MGMT_TID)
2041                                 tid = IWL_MAX_TID_COUNT;
2042
2043                         if (mvmsta)
2044                                 mvmsta->tid_data[i].lq_color = lq_color;
2045
2046                         iwl_mvm_tx_reclaim(mvm, sta_id, tid,
2047                                            (int)(le16_to_cpu(ba_tfd->q_num)),
2048                                            le16_to_cpu(ba_tfd->tfd_index),
2049                                            &ba_info,
2050                                            le32_to_cpu(ba_res->tx_rate), false);
2051                 }
2052
2053                 if (mvmsta)
2054                         iwl_mvm_tx_airtime(mvm, mvmsta,
2055                                            le32_to_cpu(ba_res->wireless_time));
2056                 rcu_read_unlock();
2057
2058                 IWL_DEBUG_TX_REPLY(mvm,
2059                                    "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n",
2060                                    sta_id, le32_to_cpu(ba_res->flags),
2061                                    le16_to_cpu(ba_res->txed),
2062                                    le16_to_cpu(ba_res->done));
2063                 return;
2064         }
2065
2066         ba_notif = (void *)pkt->data;
2067         sta_id = ba_notif->sta_id;
2068         tid = ba_notif->tid;
2069         /* "flow" corresponds to Tx queue */
2070         txq = le16_to_cpu(ba_notif->scd_flow);
2071         /* "ssn" is start of block-ack Tx window, corresponds to index
2072          * (in Tx queue's circular buffer) of first TFD/frame in window */
2073         index = le16_to_cpu(ba_notif->scd_ssn);
2074
2075         rcu_read_lock();
2076         mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
2077         if (WARN_ON_ONCE(!mvmsta)) {
2078                 rcu_read_unlock();
2079                 return;
2080         }
2081
2082         tid_data = &mvmsta->tid_data[tid];
2083
2084         ba_info.status.ampdu_ack_len = ba_notif->txed_2_done;
2085         ba_info.status.ampdu_len = ba_notif->txed;
2086         ba_info.status.tx_time = tid_data->tx_time;
2087         ba_info.status.status_driver_data[0] =
2088                 (void *)(uintptr_t)ba_notif->reduced_txp;
2089
2090         rcu_read_unlock();
2091
2092         iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info,
2093                            tid_data->rate_n_flags, false);
2094
2095         IWL_DEBUG_TX_REPLY(mvm,
2096                            "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
2097                            ba_notif->sta_addr, ba_notif->sta_id);
2098
2099         IWL_DEBUG_TX_REPLY(mvm,
2100                            "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
2101                            ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl),
2102                            le64_to_cpu(ba_notif->bitmap), txq, index,
2103                            ba_notif->txed, ba_notif->txed_2_done);
2104
2105         IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n",
2106                            ba_notif->reduced_txp);
2107 }
2108
2109 /*
2110  * Note that there are transports that buffer frames before they reach
2111  * the firmware. This means that after flush_tx_path is called, the
2112  * queue might not be empty. The race-free way to handle this is to:
2113  * 1) set the station as draining
2114  * 2) flush the Tx path
2115  * 3) wait for the transport queues to be empty
2116  */
2117 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk)
2118 {
2119         int ret;
2120         struct iwl_tx_path_flush_cmd_v1 flush_cmd = {
2121                 .queues_ctl = cpu_to_le32(tfd_msk),
2122                 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH),
2123         };
2124
2125         WARN_ON(iwl_mvm_has_new_tx_api(mvm));
2126         ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, 0,
2127                                    sizeof(flush_cmd), &flush_cmd);
2128         if (ret)
2129                 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
2130         return ret;
2131 }
2132
2133 int iwl_mvm_flush_sta_tids(struct iwl_mvm *mvm, u32 sta_id, u16 tids)
2134 {
2135         int ret;
2136         struct iwl_tx_path_flush_cmd_rsp *rsp;
2137         struct iwl_tx_path_flush_cmd flush_cmd = {
2138                 .sta_id = cpu_to_le32(sta_id),
2139                 .tid_mask = cpu_to_le16(tids),
2140         };
2141
2142         struct iwl_host_cmd cmd = {
2143                 .id = TXPATH_FLUSH,
2144                 .len = { sizeof(flush_cmd), },
2145                 .data = { &flush_cmd, },
2146         };
2147
2148         WARN_ON(!iwl_mvm_has_new_tx_api(mvm));
2149
2150         if (iwl_fw_lookup_notif_ver(mvm->fw, LONG_GROUP, TXPATH_FLUSH, 0) > 0)
2151                 cmd.flags |= CMD_WANT_SKB;
2152
2153         IWL_DEBUG_TX_QUEUES(mvm, "flush for sta id %d tid mask 0x%x\n",
2154                             sta_id, tids);
2155
2156         ret = iwl_mvm_send_cmd(mvm, &cmd);
2157
2158         if (ret) {
2159                 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
2160                 return ret;
2161         }
2162
2163         if (cmd.flags & CMD_WANT_SKB) {
2164                 int i;
2165                 int num_flushed_queues;
2166
2167                 if (WARN_ON_ONCE(iwl_rx_packet_payload_len(cmd.resp_pkt) != sizeof(*rsp))) {
2168                         ret = -EIO;
2169                         goto free_rsp;
2170                 }
2171
2172                 rsp = (void *)cmd.resp_pkt->data;
2173
2174                 if (WARN_ONCE(le16_to_cpu(rsp->sta_id) != sta_id,
2175                               "sta_id %d != rsp_sta_id %d",
2176                               sta_id, le16_to_cpu(rsp->sta_id))) {
2177                         ret = -EIO;
2178                         goto free_rsp;
2179                 }
2180
2181                 num_flushed_queues = le16_to_cpu(rsp->num_flushed_queues);
2182                 if (WARN_ONCE(num_flushed_queues > IWL_TX_FLUSH_QUEUE_RSP,
2183                               "num_flushed_queues %d", num_flushed_queues)) {
2184                         ret = -EIO;
2185                         goto free_rsp;
2186                 }
2187
2188                 for (i = 0; i < num_flushed_queues; i++) {
2189                         struct ieee80211_tx_info tx_info = {};
2190                         struct iwl_flush_queue_info *queue_info = &rsp->queues[i];
2191                         int tid = le16_to_cpu(queue_info->tid);
2192                         int read_before = le16_to_cpu(queue_info->read_before_flush);
2193                         int read_after = le16_to_cpu(queue_info->read_after_flush);
2194                         int queue_num = le16_to_cpu(queue_info->queue_num);
2195
2196                         if (tid == IWL_MGMT_TID)
2197                                 tid = IWL_MAX_TID_COUNT;
2198
2199                         IWL_DEBUG_TX_QUEUES(mvm,
2200                                             "tid %d queue_id %d read-before %d read-after %d\n",
2201                                             tid, queue_num, read_before, read_after);
2202
2203                         iwl_mvm_tx_reclaim(mvm, sta_id, tid, queue_num, read_after,
2204                                            &tx_info, 0, true);
2205                 }
2206 free_rsp:
2207                 iwl_free_resp(&cmd);
2208         }
2209         return ret;
2210 }
2211
2212 int iwl_mvm_flush_sta(struct iwl_mvm *mvm, void *sta, bool internal)
2213 {
2214         struct iwl_mvm_int_sta *int_sta = sta;
2215         struct iwl_mvm_sta *mvm_sta = sta;
2216
2217         BUILD_BUG_ON(offsetof(struct iwl_mvm_int_sta, sta_id) !=
2218                      offsetof(struct iwl_mvm_sta, sta_id));
2219
2220         if (iwl_mvm_has_new_tx_api(mvm))
2221                 return iwl_mvm_flush_sta_tids(mvm, mvm_sta->sta_id, 0xffff);
2222
2223         if (internal)
2224                 return iwl_mvm_flush_tx_path(mvm, int_sta->tfd_queue_msk);
2225
2226         return iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk);
2227 }