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, 2018-2024 Intel Corporation
   4  * Copyright (C) 2013-2015 Intel Mobile Communications GmbH
   5  * Copyright (C) 2016-2017 Intel Deutschland GmbH
   6  */
   7 #include <linux/ieee80211.h>
   8 #include <linux/etherdevice.h>
   9 #include <linux/tcp.h>
  10 #include <net/gso.h>
  11 #include <net/ip.h>
  12 #include <net/ipv6.h>
  13
  14 #include "iwl-trans.h"
  15 #include "iwl-nvm-utils.h"
  16 #include "iwl-utils.h"
  17 #include "mvm.h"
  18 #include "sta.h"
  19 #include "time-sync.h"
  20
  21 static void
  22 iwl_mvm_bar_check_trigger(struct iwl_mvm *mvm, const u8 *addr,
  23                           u16 tid, u16 ssn)
  24 {
  25         struct iwl_fw_dbg_trigger_tlv *trig;
  26         struct iwl_fw_dbg_trigger_ba *ba_trig;
  27
  28         trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, FW_DBG_TRIGGER_BA);
  29         if (!trig)
  30                 return;
  31
  32         ba_trig = (void *)trig->data;
  33
  34         if (!(le16_to_cpu(ba_trig->tx_bar) & BIT(tid)))
  35                 return;
  36
  37         iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
  38                                 "BAR sent to %pM, tid %d, ssn %d",
  39                                 addr, tid, ssn);
  40 }
  41
  42 #define OPT_HDR(type, skb, off) \
  43         (type *)(skb_network_header(skb) + (off))
  44
  45 static u32 iwl_mvm_tx_csum(struct iwl_mvm *mvm, struct sk_buff *skb,
  46                            struct ieee80211_tx_info *info,
  47                            bool amsdu)
  48 {
  49         struct ieee80211_hdr *hdr = (void *)skb->data;
  50         u16 mh_len = ieee80211_hdrlen(hdr->frame_control);
  51         u16 offload_assist = 0;
  52 #if IS_ENABLED(CONFIG_INET)
  53         u8 protocol = 0;
  54
  55         /* Do not compute checksum if already computed */
  56         if (skb->ip_summed != CHECKSUM_PARTIAL)
  57                 goto out;
  58
  59         /* We do not expect to be requested to csum stuff we do not support */
  60         if (WARN_ONCE(!(mvm->hw->netdev_features & IWL_TX_CSUM_NETIF_FLAGS) ||
  61                       (skb->protocol != htons(ETH_P_IP) &&
  62                        skb->protocol != htons(ETH_P_IPV6)),
  63                       "No support for requested checksum\n")) {
  64                 skb_checksum_help(skb);
  65                 goto out;
  66         }
  67
  68         if (skb->protocol == htons(ETH_P_IP)) {
  69                 protocol = ip_hdr(skb)->protocol;
  70         } else {
  71 #if IS_ENABLED(CONFIG_IPV6)
  72                 struct ipv6hdr *ipv6h =
  73                         (struct ipv6hdr *)skb_network_header(skb);
  74                 unsigned int off = sizeof(*ipv6h);
  75
  76                 protocol = ipv6h->nexthdr;
  77                 while (protocol != NEXTHDR_NONE && ipv6_ext_hdr(protocol)) {
  78                         struct ipv6_opt_hdr *hp;
  79
  80                         /* only supported extension headers */
  81                         if (protocol != NEXTHDR_ROUTING &&
  82                             protocol != NEXTHDR_HOP &&
  83                             protocol != NEXTHDR_DEST) {
  84                                 skb_checksum_help(skb);
  85                                 goto out;
  86                         }
  87
  88                         hp = OPT_HDR(struct ipv6_opt_hdr, skb, off);
  89                         protocol = hp->nexthdr;
  90                         off += ipv6_optlen(hp);
  91                 }
  92                 /* if we get here - protocol now should be TCP/UDP */
  93 #endif
  94         }
  95
  96         if (protocol != IPPROTO_TCP && protocol != IPPROTO_UDP) {
  97                 WARN_ON_ONCE(1);
  98                 skb_checksum_help(skb);
  99                 goto out;
 100         }
 101
 102         /* enable L4 csum */
 103         offload_assist |= BIT(TX_CMD_OFFLD_L4_EN);
 104
 105         /*
 106          * Set offset to IP header (snap).
 107          * We don't support tunneling so no need to take care of inner header.
 108          * Size is in words.
 109          */
 110         offload_assist |= (4 << TX_CMD_OFFLD_IP_HDR);
 111
 112         /* Do IPv4 csum for AMSDU only (no IP csum for Ipv6) */
 113         if (skb->protocol == htons(ETH_P_IP) && amsdu) {
 114                 ip_hdr(skb)->check = 0;
 115                 offload_assist |= BIT(TX_CMD_OFFLD_L3_EN);
 116         }
 117
 118         /* reset UDP/TCP header csum */
 119         if (protocol == IPPROTO_TCP)
 120                 tcp_hdr(skb)->check = 0;
 121         else
 122                 udp_hdr(skb)->check = 0;
 123
 124 out:
 125 #endif
 126         /*
 127          * mac header len should include IV, size is in words unless
 128          * the IV is added by the firmware like in WEP.
 129          * In new Tx API, the IV is always added by the firmware.
 130          */
 131         if (!iwl_mvm_has_new_tx_api(mvm) && info->control.hw_key &&
 132             info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP40 &&
 133             info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP104)
 134                 mh_len += info->control.hw_key->iv_len;
 135         mh_len /= 2;
 136         offload_assist |= mh_len << TX_CMD_OFFLD_MH_SIZE;
 137
 138         if (amsdu)
 139                 offload_assist |= BIT(TX_CMD_OFFLD_AMSDU);
 140         else if (ieee80211_hdrlen(hdr->frame_control) % 4)
 141                 /* padding is inserted later in transport */
 142                 offload_assist |= BIT(TX_CMD_OFFLD_PAD);
 143
 144         return offload_assist;
 145 }
 146
 147 /*
 148  * Sets most of the Tx cmd's fields
 149  */
 150 void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb,
 151                         struct iwl_tx_cmd *tx_cmd,
 152                         struct ieee80211_tx_info *info, u8 sta_id)
 153 {
 154         struct ieee80211_hdr *hdr = (void *)skb->data;
 155         __le16 fc = hdr->frame_control;
 156         u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags);
 157         u32 len = skb->len + FCS_LEN;
 158         bool amsdu = false;
 159         u8 ac;
 160
 161         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) ||
 162             (ieee80211_is_probe_resp(fc) &&
 163              !is_multicast_ether_addr(hdr->addr1)))
 164                 tx_flags |= TX_CMD_FLG_ACK;
 165         else
 166                 tx_flags &= ~TX_CMD_FLG_ACK;
 167
 168         if (ieee80211_is_probe_resp(fc))
 169                 tx_flags |= TX_CMD_FLG_TSF;
 170
 171         if (ieee80211_has_morefrags(fc))
 172                 tx_flags |= TX_CMD_FLG_MORE_FRAG;
 173
 174         if (ieee80211_is_data_qos(fc)) {
 175                 u8 *qc = ieee80211_get_qos_ctl(hdr);
 176                 tx_cmd->tid_tspec = qc[0] & 0xf;
 177                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
 178                 amsdu = *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT;
 179         } else if (ieee80211_is_back_req(fc)) {
 180                 struct ieee80211_bar *bar = (void *)skb->data;
 181                 u16 control = le16_to_cpu(bar->control);
 182                 u16 ssn = le16_to_cpu(bar->start_seq_num);
 183
 184                 tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR;
 185                 tx_cmd->tid_tspec = (control &
 186                                      IEEE80211_BAR_CTRL_TID_INFO_MASK) >>
 187                         IEEE80211_BAR_CTRL_TID_INFO_SHIFT;
 188                 WARN_ON_ONCE(tx_cmd->tid_tspec >= IWL_MAX_TID_COUNT);
 189                 iwl_mvm_bar_check_trigger(mvm, bar->ra, tx_cmd->tid_tspec,
 190                                           ssn);
 191         } else {
 192                 if (ieee80211_is_data(fc))
 193                         tx_cmd->tid_tspec = IWL_TID_NON_QOS;
 194                 else
 195                         tx_cmd->tid_tspec = IWL_MAX_TID_COUNT;
 196
 197                 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
 198                         tx_flags |= TX_CMD_FLG_SEQ_CTL;
 199                 else
 200                         tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
 201         }
 202
 203         /* Default to 0 (BE) when tid_spec is set to IWL_MAX_TID_COUNT */
 204         if (tx_cmd->tid_tspec < IWL_MAX_TID_COUNT)
 205                 ac = tid_to_mac80211_ac[tx_cmd->tid_tspec];
 206         else
 207                 ac = tid_to_mac80211_ac[0];
 208
 209         tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) <<
 210                         TX_CMD_FLG_BT_PRIO_POS;
 211
 212         if (ieee80211_is_mgmt(fc)) {
 213                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
 214                         tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_ASSOC);
 215                 else if (ieee80211_is_action(fc))
 216                         tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
 217                 else
 218                         tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
 219
 220                 /* The spec allows Action frames in A-MPDU, we don't support
 221                  * it
 222                  */
 223                 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU);
 224         } else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) {
 225                 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
 226         } else {
 227                 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
 228         }
 229
 230         if (ieee80211_is_data(fc) && len > mvm->rts_threshold &&
 231             !is_multicast_ether_addr(hdr->addr1))
 232                 tx_flags |= TX_CMD_FLG_PROT_REQUIRE;
 233
 234         if (fw_has_capa(&mvm->fw->ucode_capa,
 235                         IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT) &&
 236             ieee80211_action_contains_tpc(skb))
 237                 tx_flags |= TX_CMD_FLG_WRITE_TX_POWER;
 238
 239         tx_cmd->tx_flags = cpu_to_le32(tx_flags);
 240         /* Total # bytes to be transmitted - PCIe code will adjust for A-MSDU */
 241         tx_cmd->len = cpu_to_le16((u16)skb->len);
 242         tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
 243         tx_cmd->sta_id = sta_id;
 244
 245         tx_cmd->offload_assist =
 246                 cpu_to_le16(iwl_mvm_tx_csum(mvm, skb, info, amsdu));
 247 }
 248
 249 static u32 iwl_mvm_get_tx_ant(struct iwl_mvm *mvm,
 250                               struct ieee80211_tx_info *info,
 251                               struct ieee80211_sta *sta, __le16 fc)
 252 {
 253         if (info->band == NL80211_BAND_2GHZ &&
 254             !iwl_mvm_bt_coex_is_shared_ant_avail(mvm))
 255                 return mvm->cfg->non_shared_ant << RATE_MCS_ANT_POS;
 256
 257         if (sta && ieee80211_is_data(fc)) {
 258                 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 259
 260                 return BIT(mvmsta->tx_ant) << RATE_MCS_ANT_POS;
 261         }
 262
 263         return BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS;
 264 }
 265
 266 static u32 iwl_mvm_convert_rate_idx(struct iwl_mvm *mvm,
 267                                     struct ieee80211_tx_info *info,
 268                                     int rate_idx)
 269 {
 270         u32 rate_flags = 0;
 271         u8 rate_plcp;
 272         bool is_cck;
 273
 274         /* if the rate isn't a well known legacy rate, take the lowest one */
 275         if (rate_idx < 0 || rate_idx >= IWL_RATE_COUNT_LEGACY)
 276                 rate_idx = iwl_mvm_mac_ctxt_get_lowest_rate(mvm,
 277                                                             info,
 278                                                             info->control.vif);
 279
 280         /* Get PLCP rate for tx_cmd->rate_n_flags */
 281         rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(mvm->fw, rate_idx);
 282         is_cck = (rate_idx >= IWL_FIRST_CCK_RATE) &&
 283                  (rate_idx <= IWL_LAST_CCK_RATE);
 284
 285         /* Set CCK or OFDM flag */
 286         if (iwl_fw_lookup_cmd_ver(mvm->fw, TX_CMD, 0) > 8) {
 287                 if (!is_cck)
 288                         rate_flags |= RATE_MCS_LEGACY_OFDM_MSK;
 289                 else
 290                         rate_flags |= RATE_MCS_CCK_MSK;
 291         } else if (is_cck) {
 292                 rate_flags |= RATE_MCS_CCK_MSK_V1;
 293         }
 294
 295         return (u32)rate_plcp | rate_flags;
 296 }
 297
 298 static u32 iwl_mvm_get_inject_tx_rate(struct iwl_mvm *mvm,
 299                                       struct ieee80211_tx_info *info,
 300                                       struct ieee80211_sta *sta,
 301                                       __le16 fc)
 302 {
 303         struct ieee80211_tx_rate *rate = &info->control.rates[0];
 304         u32 result;
 305
 306         /*
 307          * we only care about legacy/HT/VHT so far, so we can
 308          * build in v1 and use iwl_new_rate_from_v1()
 309          */
 310
 311         if (rate->flags & IEEE80211_TX_RC_VHT_MCS) {
 312                 u8 mcs = ieee80211_rate_get_vht_mcs(rate);
 313                 u8 nss = ieee80211_rate_get_vht_nss(rate);
 314
 315                 result = RATE_MCS_VHT_MSK_V1;
 316                 result |= u32_encode_bits(mcs, RATE_VHT_MCS_RATE_CODE_MSK);
 317                 result |= u32_encode_bits(nss, RATE_MCS_NSS_MSK);
 318                 if (rate->flags & IEEE80211_TX_RC_SHORT_GI)
 319                         result |= RATE_MCS_SGI_MSK_V1;
 320                 if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
 321                         result |= u32_encode_bits(1, RATE_MCS_CHAN_WIDTH_MSK_V1);
 322                 else if (rate->flags & IEEE80211_TX_RC_80_MHZ_WIDTH)
 323                         result |= u32_encode_bits(2, RATE_MCS_CHAN_WIDTH_MSK_V1);
 324                 else if (rate->flags & IEEE80211_TX_RC_160_MHZ_WIDTH)
 325                         result |= u32_encode_bits(3, RATE_MCS_CHAN_WIDTH_MSK_V1);
 326
 327                 if (iwl_fw_lookup_notif_ver(mvm->fw, LONG_GROUP, TX_CMD, 0) > 6)
 328                         result = iwl_new_rate_from_v1(result);
 329         } else if (rate->flags & IEEE80211_TX_RC_MCS) {
 330                 result = RATE_MCS_HT_MSK_V1;
 331                 result |= u32_encode_bits(rate->idx,
 332                                           RATE_HT_MCS_RATE_CODE_MSK_V1 |
 333                                           RATE_HT_MCS_NSS_MSK_V1);
 334                 if (rate->flags & IEEE80211_TX_RC_SHORT_GI)
 335                         result |= RATE_MCS_SGI_MSK_V1;
 336                 if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
 337                         result |= u32_encode_bits(1, RATE_MCS_CHAN_WIDTH_MSK_V1);
 338                 if (info->flags & IEEE80211_TX_CTL_LDPC)
 339                         result |= RATE_MCS_LDPC_MSK_V1;
 340                 if (u32_get_bits(info->flags, IEEE80211_TX_CTL_STBC))
 341                         result |= RATE_MCS_STBC_MSK;
 342
 343                 if (iwl_fw_lookup_notif_ver(mvm->fw, LONG_GROUP, TX_CMD, 0) > 6)
 344                         result = iwl_new_rate_from_v1(result);
 345         } else {
 346                 int rate_idx = info->control.rates[0].idx;
 347
 348                 result = iwl_mvm_convert_rate_idx(mvm, info, rate_idx);
 349         }
 350
 351         if (info->control.antennas)
 352                 result |= u32_encode_bits(info->control.antennas,
 353                                           RATE_MCS_ANT_AB_MSK);
 354         else
 355                 result |= iwl_mvm_get_tx_ant(mvm, info, sta, fc);
 356
 357         return result;
 358 }
 359
 360 static u32 iwl_mvm_get_tx_rate(struct iwl_mvm *mvm,
 361                                struct ieee80211_tx_info *info,
 362                                struct ieee80211_sta *sta, __le16 fc)
 363 {
 364         int rate_idx = -1;
 365
 366         if (!ieee80211_hw_check(mvm->hw, HAS_RATE_CONTROL)) {
 367                 /* info->control is only relevant for non HW rate control */
 368
 369                 /* HT rate doesn't make sense for a non data frame */
 370                 WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS &&
 371                           !ieee80211_is_data(fc),
 372                           "Got a HT rate (flags:0x%x/mcs:%d/fc:0x%x/state:%d) for a non data frame\n",
 373                           info->control.rates[0].flags,
 374                           info->control.rates[0].idx,
 375                           le16_to_cpu(fc),
 376                           sta ? iwl_mvm_sta_from_mac80211(sta)->sta_state : -1);
 377
 378                 rate_idx = info->control.rates[0].idx;
 379
 380                 /* For non 2 GHZ band, remap mac80211 rate indices into driver
 381                  * indices.
 382                  */
 383                 if (info->band != NL80211_BAND_2GHZ ||
 384                     (info->flags & IEEE80211_TX_CTL_NO_CCK_RATE))
 385                         rate_idx += IWL_FIRST_OFDM_RATE;
 386
 387                 /* For 2.4 GHZ band, check that there is no need to remap */
 388                 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
 389         }
 390
 391         return iwl_mvm_convert_rate_idx(mvm, info, rate_idx);
 392 }
 393
 394 static u32 iwl_mvm_get_tx_rate_n_flags(struct iwl_mvm *mvm,
 395                                        struct ieee80211_tx_info *info,
 396                                        struct ieee80211_sta *sta, __le16 fc)
 397 {
 398         if (unlikely(info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT))
 399                 return iwl_mvm_get_inject_tx_rate(mvm, info, sta, fc);
 400
 401         return iwl_mvm_get_tx_rate(mvm, info, sta, fc) |
 402                 iwl_mvm_get_tx_ant(mvm, info, sta, fc);
 403 }
 404
 405 /*
 406  * Sets the fields in the Tx cmd that are rate related
 407  */
 408 void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd,
 409                             struct ieee80211_tx_info *info,
 410                             struct ieee80211_sta *sta, __le16 fc)
 411 {
 412         /* Set retry limit on RTS packets */
 413         tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT;
 414
 415         /* Set retry limit on DATA packets and Probe Responses*/
 416         if (ieee80211_is_probe_resp(fc)) {
 417                 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT;
 418                 tx_cmd->rts_retry_limit =
 419                         min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit);
 420         } else if (ieee80211_is_back_req(fc)) {
 421                 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT;
 422         } else {
 423                 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY;
 424         }
 425
 426         /*
 427          * for data packets, rate info comes from the table inside the fw. This
 428          * table is controlled by LINK_QUALITY commands
 429          */
 430
 431         if (likely(ieee80211_is_data(fc) && sta &&
 432                    !(info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT))) {
 433                 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 434
 435                 if (mvmsta->sta_state >= IEEE80211_STA_AUTHORIZED) {
 436                         tx_cmd->initial_rate_index = 0;
 437                         tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE);
 438                         return;
 439                 }
 440         } else if (ieee80211_is_back_req(fc)) {
 441                 tx_cmd->tx_flags |=
 442                         cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR);
 443         }
 444
 445         /* Set the rate in the TX cmd */
 446         tx_cmd->rate_n_flags =
 447                 cpu_to_le32(iwl_mvm_get_tx_rate_n_flags(mvm, info, sta, fc));
 448 }
 449
 450 static inline void iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info *info,
 451                                          u8 *crypto_hdr)
 452 {
 453         struct ieee80211_key_conf *keyconf = info->control.hw_key;
 454         u64 pn;
 455
 456         pn = atomic64_inc_return(&keyconf->tx_pn);
 457         crypto_hdr[0] = pn;
 458         crypto_hdr[2] = 0;
 459         crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6);
 460         crypto_hdr[1] = pn >> 8;
 461         crypto_hdr[4] = pn >> 16;
 462         crypto_hdr[5] = pn >> 24;
 463         crypto_hdr[6] = pn >> 32;
 464         crypto_hdr[7] = pn >> 40;
 465 }
 466
 467 /*
 468  * Sets the fields in the Tx cmd that are crypto related
 469  */
 470 static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm,
 471                                       struct ieee80211_tx_info *info,
 472                                       struct iwl_tx_cmd *tx_cmd,
 473                                       struct sk_buff *skb_frag,
 474                                       int hdrlen)
 475 {
 476         struct ieee80211_key_conf *keyconf = info->control.hw_key;
 477         u8 *crypto_hdr = skb_frag->data + hdrlen;
 478         enum iwl_tx_cmd_sec_ctrl type = TX_CMD_SEC_CCM;
 479         u64 pn;
 480
 481         switch (keyconf->cipher) {
 482         case WLAN_CIPHER_SUITE_CCMP:
 483                 iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd);
 484                 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr);
 485                 break;
 486
 487         case WLAN_CIPHER_SUITE_TKIP:
 488                 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
 489                 pn = atomic64_inc_return(&keyconf->tx_pn);
 490                 ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn);
 491                 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
 492                 break;
 493
 494         case WLAN_CIPHER_SUITE_WEP104:
 495                 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
 496                 fallthrough;
 497         case WLAN_CIPHER_SUITE_WEP40:
 498                 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP |
 499                         ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) &
 500                           TX_CMD_SEC_WEP_KEY_IDX_MSK);
 501
 502                 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
 503                 break;
 504         case WLAN_CIPHER_SUITE_GCMP:
 505         case WLAN_CIPHER_SUITE_GCMP_256:
 506                 type = TX_CMD_SEC_GCMP;
 507                 fallthrough;
 508         case WLAN_CIPHER_SUITE_CCMP_256:
 509                 /* TODO: Taking the key from the table might introduce a race
 510                  * when PTK rekeying is done, having an old packets with a PN
 511                  * based on the old key but the message encrypted with a new
 512                  * one.
 513                  * Need to handle this.
 514                  */
 515                 tx_cmd->sec_ctl |= type | TX_CMD_SEC_KEY_FROM_TABLE;
 516                 tx_cmd->key[0] = keyconf->hw_key_idx;
 517                 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr);
 518                 break;
 519         default:
 520                 tx_cmd->sec_ctl |= TX_CMD_SEC_EXT;
 521         }
 522 }
 523
 524 static bool iwl_mvm_use_host_rate(struct iwl_mvm *mvm,
 525                                   struct iwl_mvm_sta *mvmsta,
 526                                   struct ieee80211_hdr *hdr,
 527                                   struct ieee80211_tx_info *info)
 528 {
 529         if (unlikely(!mvmsta))
 530                 return true;
 531
 532         if (unlikely(info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT))
 533                 return true;
 534
 535         if (likely(ieee80211_is_data(hdr->frame_control) &&
 536                    mvmsta->sta_state >= IEEE80211_STA_AUTHORIZED))
 537                 return false;
 538
 539         /*
 540          * Not a data frame, use host rate if on an old device that
 541          * can't possibly be doing MLO (firmware may be selecting a
 542          * bad rate), if we might be doing MLO we need to let FW pick
 543          * (since we don't necesarily know the link), but FW rate
 544          * selection was fixed.
 545          */
 546         return mvm->trans->trans_cfg->device_family < IWL_DEVICE_FAMILY_BZ;
 547 }
 548
 549 static void iwl_mvm_copy_hdr(void *cmd, const void *hdr, int hdrlen,
 550                              const u8 *addr3_override)
 551 {
 552         struct ieee80211_hdr *out_hdr = cmd;
 553
 554         memcpy(cmd, hdr, hdrlen);
 555         if (addr3_override)
 556                 memcpy(out_hdr->addr3, addr3_override, ETH_ALEN);
 557 }
 558
 559 /*
 560  * Allocates and sets the Tx cmd the driver data pointers in the skb
 561  */
 562 static struct iwl_device_tx_cmd *
 563 iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb,
 564                       struct ieee80211_tx_info *info, int hdrlen,
 565                       struct ieee80211_sta *sta, u8 sta_id,
 566                       const u8 *addr3_override)
 567 {
 568         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 569         struct iwl_device_tx_cmd *dev_cmd;
 570         struct iwl_tx_cmd *tx_cmd;
 571
 572         dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans);
 573
 574         if (unlikely(!dev_cmd))
 575                 return NULL;
 576
 577         dev_cmd->hdr.cmd = TX_CMD;
 578
 579         if (iwl_mvm_has_new_tx_api(mvm)) {
 580                 u32 rate_n_flags = 0;
 581                 u16 flags = 0;
 582                 struct iwl_mvm_sta *mvmsta = sta ?
 583                         iwl_mvm_sta_from_mac80211(sta) : NULL;
 584                 bool amsdu = false;
 585
 586                 if (ieee80211_is_data_qos(hdr->frame_control)) {
 587                         u8 *qc = ieee80211_get_qos_ctl(hdr);
 588
 589                         amsdu = *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT;
 590                 }
 591
 592                 if (!info->control.hw_key)
 593                         flags |= IWL_TX_FLAGS_ENCRYPT_DIS;
 594
 595                 /*
 596                  * For data and mgmt packets rate info comes from the fw (for
 597                  * new devices, older FW is somewhat broken for this). Only
 598                  * set rate/antenna for injected frames with fixed rate, or
 599                  * when no sta is given, or with older firmware.
 600                  */
 601                 if (unlikely(iwl_mvm_use_host_rate(mvm, mvmsta, hdr, info))) {
 602                         flags |= IWL_TX_FLAGS_CMD_RATE;
 603                         rate_n_flags =
 604                                 iwl_mvm_get_tx_rate_n_flags(mvm, info, sta,
 605                                                             hdr->frame_control);
 606                 } else if (!ieee80211_is_data(hdr->frame_control) ||
 607                            mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) {
 608                         /* These are important frames */
 609                         flags |= IWL_TX_FLAGS_HIGH_PRI;
 610                 }
 611
 612                 if (mvm->trans->trans_cfg->device_family >=
 613                     IWL_DEVICE_FAMILY_AX210) {
 614                         struct iwl_tx_cmd_gen3 *cmd = (void *)dev_cmd->payload;
 615                         u32 offload_assist = iwl_mvm_tx_csum(mvm, skb,
 616                                                              info, amsdu);
 617
 618                         cmd->offload_assist = cpu_to_le32(offload_assist);
 619
 620                         /* Total # bytes to be transmitted */
 621                         cmd->len = cpu_to_le16((u16)skb->len);
 622
 623                         /* Copy MAC header from skb into command buffer */
 624                         iwl_mvm_copy_hdr(cmd->hdr, hdr, hdrlen, addr3_override);
 625
 626                         cmd->flags = cpu_to_le16(flags);
 627                         cmd->rate_n_flags = cpu_to_le32(rate_n_flags);
 628                 } else {
 629                         struct iwl_tx_cmd_gen2 *cmd = (void *)dev_cmd->payload;
 630                         u16 offload_assist = iwl_mvm_tx_csum(mvm, skb,
 631                                                              info, amsdu);
 632
 633                         cmd->offload_assist = cpu_to_le16(offload_assist);
 634
 635                         /* Total # bytes to be transmitted */
 636                         cmd->len = cpu_to_le16((u16)skb->len);
 637
 638                         /* Copy MAC header from skb into command buffer */
 639                         iwl_mvm_copy_hdr(cmd->hdr, hdr, hdrlen, addr3_override);
 640
 641                         cmd->flags = cpu_to_le32(flags);
 642                         cmd->rate_n_flags = cpu_to_le32(rate_n_flags);
 643                 }
 644                 goto out;
 645         }
 646
 647         tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
 648
 649         if (info->control.hw_key)
 650                 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen);
 651
 652         iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id);
 653
 654         iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control);
 655
 656         /* Copy MAC header from skb into command buffer */
 657         iwl_mvm_copy_hdr(tx_cmd->hdr, hdr, hdrlen, addr3_override);
 658
 659 out:
 660         return dev_cmd;
 661 }
 662
 663 static void iwl_mvm_skb_prepare_status(struct sk_buff *skb,
 664                                        struct iwl_device_tx_cmd *cmd)
 665 {
 666         struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb);
 667
 668         memset(&skb_info->status, 0, sizeof(skb_info->status));
 669         memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data));
 670
 671         skb_info->driver_data[1] = cmd;
 672 }
 673
 674 static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm,
 675                                       struct iwl_mvm_vif_link_info *link,
 676                                       struct ieee80211_tx_info *info,
 677                                       struct sk_buff *skb)
 678 {
 679         struct ieee80211_hdr *hdr = (void *)skb->data;
 680         __le16 fc = hdr->frame_control;
 681
 682         switch (info->control.vif->type) {
 683         case NL80211_IFTYPE_AP:
 684         case NL80211_IFTYPE_ADHOC:
 685                 /*
 686                  * Non-bufferable frames use the broadcast station, thus they
 687                  * use the probe queue.
 688                  * Also take care of the case where we send a deauth to a
 689                  * station that we don't have, or similarly an association
 690                  * response (with non-success status) for a station we can't
 691                  * accept.
 692                  * Also, disassociate frames might happen, particular with
 693                  * reason 7 ("Class 3 frame received from nonassociated STA").
 694                  */
 695                 if (ieee80211_is_mgmt(fc) &&
 696                     (!ieee80211_is_bufferable_mmpdu(skb) ||
 697                      ieee80211_is_deauth(fc) || ieee80211_is_disassoc(fc)))
 698                         return link->mgmt_queue;
 699
 700                 if (!ieee80211_has_order(fc) && !ieee80211_is_probe_req(fc) &&
 701                     is_multicast_ether_addr(hdr->addr1))
 702                         return link->cab_queue;
 703
 704                 WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC,
 705                           "fc=0x%02x", le16_to_cpu(fc));
 706                 return link->mgmt_queue;
 707         case NL80211_IFTYPE_P2P_DEVICE:
 708                 if (ieee80211_is_mgmt(fc))
 709                         return mvm->p2p_dev_queue;
 710
 711                 WARN_ON_ONCE(1);
 712                 return mvm->p2p_dev_queue;
 713         default:
 714                 WARN_ONCE(1, "Not a ctrl vif, no available queue\n");
 715                 return -1;
 716         }
 717 }
 718
 719 static void iwl_mvm_probe_resp_set_noa(struct iwl_mvm *mvm,
 720                                        struct sk_buff *skb)
 721 {
 722         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 723         struct iwl_mvm_vif *mvmvif =
 724                 iwl_mvm_vif_from_mac80211(info->control.vif);
 725         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
 726         int base_len = (u8 *)mgmt->u.probe_resp.variable - (u8 *)mgmt;
 727         struct iwl_probe_resp_data *resp_data;
 728         const u8 *ie;
 729         u8 *pos;
 730         u8 match[] = {
 731                 (WLAN_OUI_WFA >> 16) & 0xff,
 732                 (WLAN_OUI_WFA >> 8) & 0xff,
 733                 WLAN_OUI_WFA & 0xff,
 734                 WLAN_OUI_TYPE_WFA_P2P,
 735         };
 736
 737         rcu_read_lock();
 738
 739         resp_data = rcu_dereference(mvmvif->deflink.probe_resp_data);
 740         if (!resp_data)
 741                 goto out;
 742
 743         if (!resp_data->notif.noa_active)
 744                 goto out;
 745
 746         ie = cfg80211_find_ie_match(WLAN_EID_VENDOR_SPECIFIC,
 747                                     mgmt->u.probe_resp.variable,
 748                                     skb->len - base_len,
 749                                     match, 4, 2);
 750         if (!ie) {
 751                 IWL_DEBUG_TX(mvm, "probe resp doesn't have P2P IE\n");
 752                 goto out;
 753         }
 754
 755         if (skb_tailroom(skb) < resp_data->noa_len) {
 756                 if (pskb_expand_head(skb, 0, resp_data->noa_len, GFP_ATOMIC)) {
 757                         IWL_ERR(mvm,
 758                                 "Failed to reallocate probe resp\n");
 759                         goto out;
 760                 }
 761         }
 762
 763         pos = skb_put(skb, resp_data->noa_len);
 764
 765         *pos++ = WLAN_EID_VENDOR_SPECIFIC;
 766         /* Set length of IE body (not including ID and length itself) */
 767         *pos++ = resp_data->noa_len - 2;
 768         *pos++ = (WLAN_OUI_WFA >> 16) & 0xff;
 769         *pos++ = (WLAN_OUI_WFA >> 8) & 0xff;
 770         *pos++ = WLAN_OUI_WFA & 0xff;
 771         *pos++ = WLAN_OUI_TYPE_WFA_P2P;
 772
 773         memcpy(pos, &resp_data->notif.noa_attr,
 774                resp_data->noa_len - sizeof(struct ieee80211_vendor_ie));
 775
 776 out:
 777         rcu_read_unlock();
 778 }
 779
 780 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb)
 781 {
 782         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 783         struct ieee80211_tx_info info;
 784         struct iwl_device_tx_cmd *dev_cmd;
 785         u8 sta_id;
 786         int hdrlen = ieee80211_hdrlen(hdr->frame_control);
 787         __le16 fc = hdr->frame_control;
 788         bool offchannel = IEEE80211_SKB_CB(skb)->flags &
 789                 IEEE80211_TX_CTL_TX_OFFCHAN;
 790         int queue = -1;
 791
 792         if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc))
 793                 return -1;
 794
 795         memcpy(&info, skb->cb, sizeof(info));
 796
 797         if (WARN_ON_ONCE(skb->len > IEEE80211_MAX_DATA_LEN + hdrlen))
 798                 return -1;
 799
 800         if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU))
 801                 return -1;
 802
 803         if (info.control.vif) {
 804                 struct iwl_mvm_vif *mvmvif =
 805                         iwl_mvm_vif_from_mac80211(info.control.vif);
 806                 bool p2p_aux = iwl_mvm_has_p2p_over_aux(mvm);
 807
 808                 if ((info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE &&
 809                      p2p_aux) ||
 810                     (info.control.vif->type == NL80211_IFTYPE_STATION &&
 811                      offchannel)) {
 812                         /*
 813                          * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets
 814                          * that can be used in 2 different types of vifs, P2P
 815                          * Device and STATION.
 816                          * P2P Device uses the offchannel queue.
 817                          * STATION (HS2.0) uses the auxiliary context of the FW,
 818                          * and hence needs to be sent on the aux queue.
 819                          * If P2P_DEV_OVER_AUX is supported (p2p_aux = true)
 820                          * also P2P Device uses the aux queue.
 821                          */
 822                         sta_id = mvm->aux_sta.sta_id;
 823                         queue = mvm->aux_queue;
 824                         if (WARN_ON(queue == IWL_MVM_INVALID_QUEUE))
 825                                 return -1;
 826                 } else if (info.control.vif->type ==
 827                            NL80211_IFTYPE_P2P_DEVICE ||
 828                            info.control.vif->type == NL80211_IFTYPE_AP ||
 829                            info.control.vif->type == NL80211_IFTYPE_ADHOC) {
 830                         u32 link_id = u32_get_bits(info.control.flags,
 831                                                    IEEE80211_TX_CTRL_MLO_LINK);
 832                         struct iwl_mvm_vif_link_info *link;
 833
 834                         if (link_id == IEEE80211_LINK_UNSPECIFIED) {
 835                                 if (info.control.vif->active_links)
 836                                         link_id = ffs(info.control.vif->active_links) - 1;
 837                                 else
 838                                         link_id = 0;
 839                         }
 840
 841                         link = mvmvif->link[link_id];
 842                         if (WARN_ON(!link))
 843                                 return -1;
 844
 845                         if (!ieee80211_is_data(hdr->frame_control))
 846                                 sta_id = link->bcast_sta.sta_id;
 847                         else
 848                                 sta_id = link->mcast_sta.sta_id;
 849
 850                         queue = iwl_mvm_get_ctrl_vif_queue(mvm, link, &info,
 851                                                            skb);
 852                 } else if (info.control.vif->type == NL80211_IFTYPE_MONITOR) {
 853                         queue = mvm->snif_queue;
 854                         sta_id = mvm->snif_sta.sta_id;
 855                 }
 856         }
 857
 858         if (queue < 0) {
 859                 IWL_ERR(mvm, "No queue was found. Dropping TX\n");
 860                 return -1;
 861         }
 862
 863         if (unlikely(ieee80211_is_probe_resp(fc)))
 864                 iwl_mvm_probe_resp_set_noa(mvm, skb);
 865
 866         IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue);
 867
 868         dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id,
 869                                         NULL);
 870         if (!dev_cmd)
 871                 return -1;
 872
 873         /* From now on, we cannot access info->control */
 874         iwl_mvm_skb_prepare_status(skb, dev_cmd);
 875
 876         if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) {
 877                 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
 878                 return -1;
 879         }
 880
 881         return 0;
 882 }
 883
 884 unsigned int iwl_mvm_max_amsdu_size(struct iwl_mvm *mvm,
 885                                     struct ieee80211_sta *sta, unsigned int tid)
 886 {
 887         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 888         u8 ac = tid_to_mac80211_ac[tid];
 889         enum nl80211_band band;
 890         unsigned int txf;
 891         unsigned int val;
 892         int lmac;
 893
 894         /* For HE redirect to trigger based fifos */
 895         if (sta->deflink.he_cap.has_he && !WARN_ON(!iwl_mvm_has_new_tx_api(mvm)))
 896                 ac += 4;
 897
 898         txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac);
 899
 900         /*
 901          * Don't send an AMSDU that will be longer than the TXF.
 902          * Add a security margin of 256 for the TX command + headers.
 903          * We also want to have the start of the next packet inside the
 904          * fifo to be able to send bursts.
 905          */
 906         val = mvmsta->max_amsdu_len;
 907
 908         if (hweight16(sta->valid_links) <= 1) {
 909                 if (sta->valid_links) {
 910                         struct ieee80211_bss_conf *link_conf;
 911                         unsigned int link = ffs(sta->valid_links) - 1;
 912
 913                         rcu_read_lock();
 914                         link_conf = rcu_dereference(mvmsta->vif->link_conf[link]);
 915                         if (WARN_ON(!link_conf))
 916                                 band = NL80211_BAND_2GHZ;
 917                         else
 918                                 band = link_conf->chanreq.oper.chan->band;
 919                         rcu_read_unlock();
 920                 } else {
 921                         band = mvmsta->vif->bss_conf.chanreq.oper.chan->band;
 922                 }
 923
 924                 lmac = iwl_mvm_get_lmac_id(mvm, band);
 925         } else if (fw_has_capa(&mvm->fw->ucode_capa,
 926                                IWL_UCODE_TLV_CAPA_CDB_SUPPORT)) {
 927                 /* for real MLO restrict to both LMACs if they exist */
 928                 lmac = IWL_LMAC_5G_INDEX;
 929                 val = min_t(unsigned int, val,
 930                             mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256);
 931                 lmac = IWL_LMAC_24G_INDEX;
 932         } else {
 933                 lmac = IWL_LMAC_24G_INDEX;
 934         }
 935
 936         return min_t(unsigned int, val,
 937                      mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256);
 938 }
 939
 940 #ifdef CONFIG_INET
 941
 942 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
 943                           struct ieee80211_tx_info *info,
 944                           struct ieee80211_sta *sta,
 945                           struct sk_buff_head *mpdus_skb)
 946 {
 947         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 948         struct ieee80211_hdr *hdr = (void *)skb->data;
 949         unsigned int mss = skb_shinfo(skb)->gso_size;
 950         unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len;
 951         u16 snap_ip_tcp, pad;
 952         netdev_features_t netdev_flags = NETIF_F_CSUM_MASK | NETIF_F_SG;
 953         u8 tid;
 954
 955         snap_ip_tcp = 8 + skb_network_header_len(skb) + tcp_hdrlen(skb);
 956
 957         if (!mvmsta->max_amsdu_len ||
 958             !ieee80211_is_data_qos(hdr->frame_control) ||
 959             !mvmsta->amsdu_enabled)
 960                 return iwl_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
 961
 962         /*
 963          * Do not build AMSDU for IPv6 with extension headers.
 964          * ask stack to segment and checkum the generated MPDUs for us.
 965          */
 966         if (skb->protocol == htons(ETH_P_IPV6) &&
 967             ((struct ipv6hdr *)skb_network_header(skb))->nexthdr !=
 968             IPPROTO_TCP) {
 969                 netdev_flags &= ~NETIF_F_CSUM_MASK;
 970                 return iwl_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
 971         }
 972
 973         tid = ieee80211_get_tid(hdr);
 974         if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
 975                 return -EINVAL;
 976
 977         /*
 978          * No need to lock amsdu_in_ampdu_allowed since it can't be modified
 979          * during an BA session.
 980          */
 981         if ((info->flags & IEEE80211_TX_CTL_AMPDU &&
 982              !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) ||
 983             !(mvmsta->amsdu_enabled & BIT(tid)))
 984                 return iwl_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
 985
 986         /*
 987          * Take the min of ieee80211 station and mvm station
 988          */
 989         max_amsdu_len =
 990                 min_t(unsigned int, sta->cur->max_amsdu_len,
 991                       iwl_mvm_max_amsdu_size(mvm, sta, tid));
 992
 993         /*
 994          * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not
 995          * supported. This is a spec requirement (IEEE 802.11-2015
 996          * section 8.7.3 NOTE 3).
 997          */
 998         if (info->flags & IEEE80211_TX_CTL_AMPDU &&
 999             !sta->deflink.vht_cap.vht_supported)
1000                 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095);
1001
1002         /* Sub frame header + SNAP + IP header + TCP header + MSS */
1003         subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss;
1004         pad = (4 - subf_len) & 0x3;
1005
1006         /*
1007          * If we have N subframes in the A-MSDU, then the A-MSDU's size is
1008          * N * subf_len + (N - 1) * pad.
1009          */
1010         num_subframes = (max_amsdu_len + pad) / (subf_len + pad);
1011
1012         if (sta->max_amsdu_subframes &&
1013             num_subframes > sta->max_amsdu_subframes)
1014                 num_subframes = sta->max_amsdu_subframes;
1015
1016         tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
1017                 tcp_hdrlen(skb) + skb->data_len;
1018
1019         /*
1020          * Make sure we have enough TBs for the A-MSDU:
1021          *      2 for each subframe
1022          *      1 more for each fragment
1023          *      1 more for the potential data in the header
1024          */
1025         if ((num_subframes * 2 + skb_shinfo(skb)->nr_frags + 1) >
1026             mvm->trans->max_skb_frags)
1027                 num_subframes = 1;
1028
1029         if (num_subframes > 1)
1030                 *ieee80211_get_qos_ctl(hdr) |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
1031
1032         /* This skb fits in one single A-MSDU */
1033         if (num_subframes * mss >= tcp_payload_len) {
1034                 __skb_queue_tail(mpdus_skb, skb);
1035                 return 0;
1036         }
1037
1038         /*
1039          * Trick the segmentation function to make it
1040          * create SKBs that can fit into one A-MSDU.
1041          */
1042         return iwl_tx_tso_segment(skb, num_subframes, netdev_flags, mpdus_skb);
1043 }
1044 #else /* CONFIG_INET */
1045 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
1046                           struct ieee80211_tx_info *info,
1047                           struct ieee80211_sta *sta,
1048                           struct sk_buff_head *mpdus_skb)
1049 {
1050         /* Impossible to get TSO with CONFIG_INET */
1051         WARN_ON(1);
1052
1053         return -1;
1054 }
1055 #endif
1056
1057 /* Check if there are any timed-out TIDs on a given shared TXQ */
1058 static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id)
1059 {
1060         unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap;
1061         unsigned long now = jiffies;
1062         int tid;
1063
1064         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1065                 return false;
1066
1067         for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) {
1068                 if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] +
1069                                 IWL_MVM_DQA_QUEUE_TIMEOUT, now))
1070                         return true;
1071         }
1072
1073         return false;
1074 }
1075
1076 static void iwl_mvm_tx_airtime(struct iwl_mvm *mvm,
1077                                struct iwl_mvm_sta *mvmsta,
1078                                int airtime)
1079 {
1080         int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
1081         struct iwl_mvm_tcm_mac *mdata;
1082
1083         if (mac >= NUM_MAC_INDEX_DRIVER)
1084                 return;
1085
1086         mdata = &mvm->tcm.data[mac];
1087
1088         if (mvm->tcm.paused)
1089                 return;
1090
1091         if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD))
1092                 schedule_delayed_work(&mvm->tcm.work, 0);
1093
1094         mdata->tx.airtime += airtime;
1095 }
1096
1097 static int iwl_mvm_tx_pkt_queued(struct iwl_mvm *mvm,
1098                                  struct iwl_mvm_sta *mvmsta, int tid)
1099 {
1100         u32 ac = tid_to_mac80211_ac[tid];
1101         int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
1102         struct iwl_mvm_tcm_mac *mdata;
1103
1104         if (mac >= NUM_MAC_INDEX_DRIVER)
1105                 return -EINVAL;
1106
1107         mdata = &mvm->tcm.data[mac];
1108
1109         mdata->tx.pkts[ac]++;
1110
1111         return 0;
1112 }
1113
1114 /*
1115  * Sets the fields in the Tx cmd that are crypto related.
1116  *
1117  * This function must be called with BHs disabled.
1118  */
1119 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb,
1120                            struct ieee80211_tx_info *info,
1121                            struct ieee80211_sta *sta,
1122                            const u8 *addr3_override)
1123 {
1124         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1125         struct iwl_mvm_sta *mvmsta;
1126         struct iwl_device_tx_cmd *dev_cmd;
1127         __le16 fc;
1128         u16 seq_number = 0;
1129         u8 tid = IWL_MAX_TID_COUNT;
1130         u16 txq_id;
1131         bool is_ampdu = false;
1132         int hdrlen;
1133
1134         if (WARN_ON_ONCE(!sta))
1135                 return -1;
1136
1137         mvmsta = iwl_mvm_sta_from_mac80211(sta);
1138         fc = hdr->frame_control;
1139         hdrlen = ieee80211_hdrlen(fc);
1140
1141         if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc))
1142                 return -1;
1143
1144         if (WARN_ON_ONCE(mvmsta->deflink.sta_id == IWL_INVALID_STA))
1145                 return -1;
1146
1147         if (unlikely(ieee80211_is_any_nullfunc(fc)) && sta->deflink.he_cap.has_he)
1148                 return -1;
1149
1150         if (unlikely(ieee80211_is_probe_resp(fc)))
1151                 iwl_mvm_probe_resp_set_noa(mvm, skb);
1152
1153         dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen,
1154                                         sta, mvmsta->deflink.sta_id,
1155                                         addr3_override);
1156         if (!dev_cmd)
1157                 goto drop;
1158
1159         /*
1160          * we handle that entirely ourselves -- for uAPSD the firmware
1161          * will always send a notification, and for PS-Poll responses
1162          * we'll notify mac80211 when getting frame status
1163          */
1164         info->flags &= ~IEEE80211_TX_STATUS_EOSP;
1165
1166         spin_lock(&mvmsta->lock);
1167
1168         /* nullfunc frames should go to the MGMT queue regardless of QOS,
1169          * the conditions of !ieee80211_is_qos_nullfunc(fc) and
1170          * !ieee80211_is_data_qos(fc) keep the default assignment of MGMT TID
1171          */
1172         if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
1173                 tid = ieee80211_get_tid(hdr);
1174                 if (WARN_ONCE(tid >= IWL_MAX_TID_COUNT, "Invalid TID %d", tid))
1175                         goto drop_unlock_sta;
1176
1177                 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU;
1178                 if (WARN_ONCE(is_ampdu &&
1179                               mvmsta->tid_data[tid].state != IWL_AGG_ON,
1180                               "Invalid internal agg state %d for TID %d",
1181                                mvmsta->tid_data[tid].state, tid))
1182                         goto drop_unlock_sta;
1183
1184                 seq_number = mvmsta->tid_data[tid].seq_number;
1185                 seq_number &= IEEE80211_SCTL_SEQ;
1186
1187                 if (!iwl_mvm_has_new_tx_api(mvm)) {
1188                         struct iwl_tx_cmd *tx_cmd = (void *)dev_cmd->payload;
1189
1190                         hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
1191                         hdr->seq_ctrl |= cpu_to_le16(seq_number);
1192                         /* update the tx_cmd hdr as it was already copied */
1193                         tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl;
1194                 }
1195         } else if (ieee80211_is_data(fc) && !ieee80211_is_data_qos(fc) &&
1196                    !ieee80211_is_nullfunc(fc)) {
1197                 tid = IWL_TID_NON_QOS;
1198         }
1199
1200         txq_id = mvmsta->tid_data[tid].txq_id;
1201
1202         WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
1203
1204         if (WARN_ONCE(txq_id == IWL_MVM_INVALID_QUEUE, "Invalid TXQ id")) {
1205                 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1206                 spin_unlock(&mvmsta->lock);
1207                 return -1;
1208         }
1209
1210         if (!iwl_mvm_has_new_tx_api(mvm)) {
1211                 /* Keep track of the time of the last frame for this RA/TID */
1212                 mvm->queue_info[txq_id].last_frame_time[tid] = jiffies;
1213
1214                 /*
1215                  * If we have timed-out TIDs - schedule the worker that will
1216                  * reconfig the queues and update them
1217                  *
1218                  * Note that the no lock is taken here in order to not serialize
1219                  * the TX flow. This isn't dangerous because scheduling
1220                  * mvm->add_stream_wk can't ruin the state, and if we DON'T
1221                  * schedule it due to some race condition then next TX we get
1222                  * here we will.
1223                  */
1224                 if (unlikely(mvm->queue_info[txq_id].status ==
1225                              IWL_MVM_QUEUE_SHARED &&
1226                              iwl_mvm_txq_should_update(mvm, txq_id)))
1227                         schedule_work(&mvm->add_stream_wk);
1228         }
1229
1230         IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x len %d\n",
1231                      mvmsta->deflink.sta_id, tid, txq_id,
1232                      IEEE80211_SEQ_TO_SN(seq_number), skb->len);
1233
1234         /* From now on, we cannot access info->control */
1235         iwl_mvm_skb_prepare_status(skb, dev_cmd);
1236
1237         /*
1238          * The IV is introduced by the HW for new tx api, and it is not present
1239          * in the skb, hence, don't tell iwl_mvm_mei_tx_copy_to_csme about the
1240          * IV for those devices.
1241          */
1242         if (ieee80211_is_data(fc))
1243                 iwl_mvm_mei_tx_copy_to_csme(mvm, skb,
1244                                             info->control.hw_key &&
1245                                             !iwl_mvm_has_new_tx_api(mvm) ?
1246                                             info->control.hw_key->iv_len : 0);
1247
1248         if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id))
1249                 goto drop_unlock_sta;
1250
1251         if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc))
1252                 mvmsta->tid_data[tid].seq_number = seq_number + 0x10;
1253
1254         spin_unlock(&mvmsta->lock);
1255
1256         if (iwl_mvm_tx_pkt_queued(mvm, mvmsta,
1257                                   tid == IWL_MAX_TID_COUNT ? 0 : tid))
1258                 goto drop;
1259
1260         return 0;
1261
1262 drop_unlock_sta:
1263         iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1264         spin_unlock(&mvmsta->lock);
1265 drop:
1266         IWL_DEBUG_TX(mvm, "TX to [%d|%d] dropped\n", mvmsta->deflink.sta_id,
1267                      tid);
1268         return -1;
1269 }
1270
1271 int iwl_mvm_tx_skb_sta(struct iwl_mvm *mvm, struct sk_buff *skb,
1272                        struct ieee80211_sta *sta)
1273 {
1274         struct iwl_mvm_sta *mvmsta;
1275         struct ieee80211_tx_info info;
1276         struct sk_buff_head mpdus_skbs;
1277         struct ieee80211_vif *vif;
1278         unsigned int payload_len;
1279         int ret;
1280         struct sk_buff *orig_skb = skb;
1281         const u8 *addr3;
1282
1283         if (WARN_ON_ONCE(!sta))
1284                 return -1;
1285
1286         mvmsta = iwl_mvm_sta_from_mac80211(sta);
1287
1288         if (WARN_ON_ONCE(mvmsta->deflink.sta_id == IWL_INVALID_STA))
1289                 return -1;
1290
1291         memcpy(&info, skb->cb, sizeof(info));
1292
1293         if (!skb_is_gso(skb))
1294                 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta, NULL);
1295
1296         payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
1297                 tcp_hdrlen(skb) + skb->data_len;
1298
1299         if (payload_len <= skb_shinfo(skb)->gso_size)
1300                 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta, NULL);
1301
1302         __skb_queue_head_init(&mpdus_skbs);
1303
1304         vif = info.control.vif;
1305         if (!vif)
1306                 return -1;
1307
1308         ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs);
1309         if (ret)
1310                 return ret;
1311
1312         WARN_ON(skb_queue_empty(&mpdus_skbs));
1313
1314         /*
1315          * As described in IEEE sta 802.11-2020, table 9-30 (Address
1316          * field contents), A-MSDU address 3 should contain the BSSID
1317          * address.
1318          * Pass address 3 down to iwl_mvm_tx_mpdu() and further to set it
1319          * in the command header. We need to preserve the original
1320          * address 3 in the skb header to correctly create all the
1321          * A-MSDU subframe headers from it.
1322          */
1323         switch (vif->type) {
1324         case NL80211_IFTYPE_STATION:
1325                 addr3 = vif->cfg.ap_addr;
1326                 break;
1327         case NL80211_IFTYPE_AP:
1328                 addr3 = vif->addr;
1329                 break;
1330         default:
1331                 addr3 = NULL;
1332                 break;
1333         }
1334
1335         while (!skb_queue_empty(&mpdus_skbs)) {
1336                 struct ieee80211_hdr *hdr;
1337                 bool amsdu;
1338
1339                 skb = __skb_dequeue(&mpdus_skbs);
1340                 hdr = (void *)skb->data;
1341                 amsdu = ieee80211_is_data_qos(hdr->frame_control) &&
1342                         (*ieee80211_get_qos_ctl(hdr) &
1343                          IEEE80211_QOS_CTL_A_MSDU_PRESENT);
1344
1345                 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta,
1346                                       amsdu ? addr3 : NULL);
1347                 if (ret) {
1348                         /* Free skbs created as part of TSO logic that have not yet been dequeued */
1349                         __skb_queue_purge(&mpdus_skbs);
1350                         /* skb here is not necessarily same as skb that entered this method,
1351                          * so free it explicitly.
1352                          */
1353                         if (skb == orig_skb)
1354                                 ieee80211_free_txskb(mvm->hw, skb);
1355                         else
1356                                 kfree_skb(skb);
1357                         /* there was error, but we consumed skb one way or another, so return 0 */
1358                         return 0;
1359                 }
1360         }
1361
1362         return 0;
1363 }
1364
1365 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm,
1366                                       struct ieee80211_sta *sta, u8 tid)
1367 {
1368         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1369         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1370         struct ieee80211_vif *vif = mvmsta->vif;
1371         u16 normalized_ssn;
1372
1373         lockdep_assert_held(&mvmsta->lock);
1374
1375         if ((tid_data->state == IWL_AGG_ON ||
1376              tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) &&
1377             iwl_mvm_tid_queued(mvm, tid_data) == 0) {
1378                 /*
1379                  * Now that this aggregation or DQA queue is empty tell
1380                  * mac80211 so it knows we no longer have frames buffered for
1381                  * the station on this TID (for the TIM bitmap calculation.)
1382                  */
1383                 ieee80211_sta_set_buffered(sta, tid, false);
1384         }
1385
1386         /*
1387          * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
1388          * to align the wrap around of ssn so we compare relevant values.
1389          */
1390         normalized_ssn = tid_data->ssn;
1391         if (mvm->trans->trans_cfg->gen2)
1392                 normalized_ssn &= 0xff;
1393
1394         if (normalized_ssn != tid_data->next_reclaimed)
1395                 return;
1396
1397         switch (tid_data->state) {
1398         case IWL_EMPTYING_HW_QUEUE_ADDBA:
1399                 IWL_DEBUG_TX_QUEUES(mvm,
1400                                     "Can continue addBA flow ssn = next_recl = %d\n",
1401                                     tid_data->next_reclaimed);
1402                 tid_data->state = IWL_AGG_STARTING;
1403                 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1404                 break;
1405
1406         case IWL_EMPTYING_HW_QUEUE_DELBA:
1407                 IWL_DEBUG_TX_QUEUES(mvm,
1408                                     "Can continue DELBA flow ssn = next_recl = %d\n",
1409                                     tid_data->next_reclaimed);
1410                 tid_data->state = IWL_AGG_OFF;
1411                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1412                 break;
1413
1414         default:
1415                 break;
1416         }
1417 }
1418
1419 #ifdef CONFIG_IWLWIFI_DEBUG
1420 const char *iwl_mvm_get_tx_fail_reason(u32 status)
1421 {
1422 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
1423 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
1424
1425         switch (status & TX_STATUS_MSK) {
1426         case TX_STATUS_SUCCESS:
1427                 return "SUCCESS";
1428         TX_STATUS_POSTPONE(DELAY);
1429         TX_STATUS_POSTPONE(FEW_BYTES);
1430         TX_STATUS_POSTPONE(BT_PRIO);
1431         TX_STATUS_POSTPONE(QUIET_PERIOD);
1432         TX_STATUS_POSTPONE(CALC_TTAK);
1433         TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
1434         TX_STATUS_FAIL(SHORT_LIMIT);
1435         TX_STATUS_FAIL(LONG_LIMIT);
1436         TX_STATUS_FAIL(UNDERRUN);
1437         TX_STATUS_FAIL(DRAIN_FLOW);
1438         TX_STATUS_FAIL(RFKILL_FLUSH);
1439         TX_STATUS_FAIL(LIFE_EXPIRE);
1440         TX_STATUS_FAIL(DEST_PS);
1441         TX_STATUS_FAIL(HOST_ABORTED);
1442         TX_STATUS_FAIL(BT_RETRY);
1443         TX_STATUS_FAIL(STA_INVALID);
1444         TX_STATUS_FAIL(FRAG_DROPPED);
1445         TX_STATUS_FAIL(TID_DISABLE);
1446         TX_STATUS_FAIL(FIFO_FLUSHED);
1447         TX_STATUS_FAIL(SMALL_CF_POLL);
1448         TX_STATUS_FAIL(FW_DROP);
1449         TX_STATUS_FAIL(STA_COLOR_MISMATCH);
1450         }
1451
1452         return "UNKNOWN";
1453
1454 #undef TX_STATUS_FAIL
1455 #undef TX_STATUS_POSTPONE
1456 }
1457 #endif /* CONFIG_IWLWIFI_DEBUG */
1458
1459 static int iwl_mvm_get_hwrate_chan_width(u32 chan_width)
1460 {
1461         switch (chan_width) {
1462         case RATE_MCS_CHAN_WIDTH_20:
1463                 return 0;
1464         case RATE_MCS_CHAN_WIDTH_40:
1465                 return IEEE80211_TX_RC_40_MHZ_WIDTH;
1466         case RATE_MCS_CHAN_WIDTH_80:
1467                 return IEEE80211_TX_RC_80_MHZ_WIDTH;
1468         case RATE_MCS_CHAN_WIDTH_160:
1469                 return IEEE80211_TX_RC_160_MHZ_WIDTH;
1470         default:
1471                 return 0;
1472         }
1473 }
1474
1475 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags,
1476                                enum nl80211_band band,
1477                                struct ieee80211_tx_rate *r)
1478 {
1479         u32 format = rate_n_flags & RATE_MCS_MOD_TYPE_MSK;
1480         u32 rate = format == RATE_MCS_HT_MSK ?
1481                 RATE_HT_MCS_INDEX(rate_n_flags) :
1482                 rate_n_flags & RATE_MCS_CODE_MSK;
1483
1484         r->flags |=
1485                 iwl_mvm_get_hwrate_chan_width(rate_n_flags &
1486                                               RATE_MCS_CHAN_WIDTH_MSK);
1487
1488         if (rate_n_flags & RATE_MCS_SGI_MSK)
1489                 r->flags |= IEEE80211_TX_RC_SHORT_GI;
1490         if (format ==  RATE_MCS_HT_MSK) {
1491                 r->flags |= IEEE80211_TX_RC_MCS;
1492                 r->idx = rate;
1493         } else if (format ==  RATE_MCS_VHT_MSK) {
1494                 ieee80211_rate_set_vht(r, rate,
1495                                        FIELD_GET(RATE_MCS_NSS_MSK,
1496                                                  rate_n_flags) + 1);
1497                 r->flags |= IEEE80211_TX_RC_VHT_MCS;
1498         } else if (format == RATE_MCS_HE_MSK) {
1499                 /* mac80211 cannot do this without ieee80211_tx_status_ext()
1500                  * but it only matters for radiotap */
1501                 r->idx = 0;
1502         } else {
1503                 r->idx = iwl_mvm_legacy_hw_idx_to_mac80211_idx(rate_n_flags,
1504                                                                band);
1505         }
1506 }
1507
1508 void iwl_mvm_hwrate_to_tx_rate_v1(u32 rate_n_flags,
1509                                   enum nl80211_band band,
1510                                   struct ieee80211_tx_rate *r)
1511 {
1512         if (rate_n_flags & RATE_HT_MCS_GF_MSK)
1513                 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
1514
1515         r->flags |=
1516                 iwl_mvm_get_hwrate_chan_width(rate_n_flags &
1517                                               RATE_MCS_CHAN_WIDTH_MSK_V1);
1518
1519         if (rate_n_flags & RATE_MCS_SGI_MSK_V1)
1520                 r->flags |= IEEE80211_TX_RC_SHORT_GI;
1521         if (rate_n_flags & RATE_MCS_HT_MSK_V1) {
1522                 r->flags |= IEEE80211_TX_RC_MCS;
1523                 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK_V1;
1524         } else if (rate_n_flags & RATE_MCS_VHT_MSK_V1) {
1525                 ieee80211_rate_set_vht(
1526                         r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK,
1527                         FIELD_GET(RATE_MCS_NSS_MSK, rate_n_flags) + 1);
1528                 r->flags |= IEEE80211_TX_RC_VHT_MCS;
1529         } else {
1530                 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
1531                                                              band);
1532         }
1533 }
1534
1535 /*
1536  * translate ucode response to mac80211 tx status control values
1537  */
1538 static void iwl_mvm_hwrate_to_tx_status(const struct iwl_fw *fw,
1539                                         u32 rate_n_flags,
1540                                         struct ieee80211_tx_info *info)
1541 {
1542         struct ieee80211_tx_rate *r = &info->status.rates[0];
1543
1544         if (iwl_fw_lookup_notif_ver(fw, LONG_GROUP,
1545                                     TX_CMD, 0) <= 6)
1546                 rate_n_flags = iwl_new_rate_from_v1(rate_n_flags);
1547
1548         info->status.antenna =
1549                 ((rate_n_flags & RATE_MCS_ANT_AB_MSK) >> RATE_MCS_ANT_POS);
1550         iwl_mvm_hwrate_to_tx_rate(rate_n_flags,
1551                                   info->band, r);
1552 }
1553
1554 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm,
1555                                             u32 status, __le16 frame_control)
1556 {
1557         struct iwl_fw_dbg_trigger_tlv *trig;
1558         struct iwl_fw_dbg_trigger_tx_status *status_trig;
1559         int i;
1560
1561         if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS) {
1562                 enum iwl_fw_ini_time_point tp =
1563                         IWL_FW_INI_TIME_POINT_TX_FAILED;
1564
1565                 if (ieee80211_is_action(frame_control))
1566                         tp = IWL_FW_INI_TIME_POINT_TX_WFD_ACTION_FRAME_FAILED;
1567
1568                 iwl_dbg_tlv_time_point(&mvm->fwrt,
1569                                        tp, NULL);
1570                 return;
1571         }
1572
1573         trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL,
1574                                      FW_DBG_TRIGGER_TX_STATUS);
1575         if (!trig)
1576                 return;
1577
1578         status_trig = (void *)trig->data;
1579
1580         for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) {
1581                 /* don't collect on status 0 */
1582                 if (!status_trig->statuses[i].status)
1583                         break;
1584
1585                 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK))
1586                         continue;
1587
1588                 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
1589                                         "Tx status %d was received",
1590                                         status & TX_STATUS_MSK);
1591                 break;
1592         }
1593 }
1594
1595 /*
1596  * iwl_mvm_get_scd_ssn - returns the SSN of the SCD
1597  * @tx_resp: the Tx response from the fw (agg or non-agg)
1598  *
1599  * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since
1600  * it can't know that everything will go well until the end of the AMPDU, it
1601  * can't know in advance the number of MPDUs that will be sent in the current
1602  * batch. This is why it writes the agg Tx response while it fetches the MPDUs.
1603  * Hence, it can't know in advance what the SSN of the SCD will be at the end
1604  * of the batch. This is why the SSN of the SCD is written at the end of the
1605  * whole struct at a variable offset. This function knows how to cope with the
1606  * variable offset and returns the SSN of the SCD.
1607  *
1608  * For 22000-series and lower, this is just 12 bits. For later, 16 bits.
1609  */
1610 static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm,
1611                                       struct iwl_tx_resp *tx_resp)
1612 {
1613         u32 val = le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) +
1614                                tx_resp->frame_count);
1615
1616         if (mvm->trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210)
1617                 return val & 0xFFFF;
1618         return val & 0xFFF;
1619 }
1620
1621 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm,
1622                                      struct iwl_rx_packet *pkt)
1623 {
1624         struct ieee80211_sta *sta;
1625         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1626         int txq_id = SEQ_TO_QUEUE(sequence);
1627         /* struct iwl_tx_resp_v3 is almost the same */
1628         struct iwl_tx_resp *tx_resp = (void *)pkt->data;
1629         int sta_id = IWL_TX_RES_GET_RA(tx_resp->ra_tid);
1630         int tid = IWL_TX_RES_GET_TID(tx_resp->ra_tid);
1631         struct agg_tx_status *agg_status =
1632                 iwl_mvm_get_agg_status(mvm, tx_resp);
1633         u32 status = le16_to_cpu(agg_status->status);
1634         u16 ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp);
1635         struct sk_buff_head skbs;
1636         u8 skb_freed = 0;
1637         u8 lq_color;
1638         u16 next_reclaimed, seq_ctl;
1639         bool is_ndp = false;
1640
1641         __skb_queue_head_init(&skbs);
1642
1643         if (iwl_mvm_has_new_tx_api(mvm))
1644                 txq_id = le16_to_cpu(tx_resp->tx_queue);
1645
1646         seq_ctl = le16_to_cpu(tx_resp->seq_ctl);
1647
1648         /* we can free until ssn % q.n_bd not inclusive */
1649         iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs, false);
1650
1651         while (!skb_queue_empty(&skbs)) {
1652                 struct sk_buff *skb = __skb_dequeue(&skbs);
1653                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1654                 struct ieee80211_hdr *hdr = (void *)skb->data;
1655                 bool flushed = false;
1656
1657                 skb_freed++;
1658
1659                 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1660
1661                 memset(&info->status, 0, sizeof(info->status));
1662                 info->flags &= ~(IEEE80211_TX_STAT_ACK | IEEE80211_TX_STAT_TX_FILTERED);
1663
1664                 /* inform mac80211 about what happened with the frame */
1665                 switch (status & TX_STATUS_MSK) {
1666                 case TX_STATUS_SUCCESS:
1667                 case TX_STATUS_DIRECT_DONE:
1668                         info->flags |= IEEE80211_TX_STAT_ACK;
1669                         break;
1670                 case TX_STATUS_FAIL_FIFO_FLUSHED:
1671                 case TX_STATUS_FAIL_DRAIN_FLOW:
1672                         flushed = true;
1673                         break;
1674                 case TX_STATUS_FAIL_DEST_PS:
1675                         /* the FW should have stopped the queue and not
1676                          * return this status
1677                          */
1678                         IWL_ERR_LIMIT(mvm,
1679                                       "FW reported TX filtered, status=0x%x, FC=0x%x\n",
1680                                       status, le16_to_cpu(hdr->frame_control));
1681                         info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
1682                         break;
1683                 default:
1684                         break;
1685                 }
1686
1687                 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS &&
1688                     ieee80211_is_mgmt(hdr->frame_control))
1689                         iwl_mvm_toggle_tx_ant(mvm, &mvm->mgmt_last_antenna_idx);
1690
1691                 /*
1692                  * If we are freeing multiple frames, mark all the frames
1693                  * but the first one as acked, since they were acknowledged
1694                  * before
1695                  * */
1696                 if (skb_freed > 1)
1697                         info->flags |= IEEE80211_TX_STAT_ACK;
1698
1699                 iwl_mvm_tx_status_check_trigger(mvm, status, hdr->frame_control);
1700
1701                 info->status.rates[0].count = tx_resp->failure_frame + 1;
1702
1703                 iwl_mvm_hwrate_to_tx_status(mvm->fw,
1704                                             le32_to_cpu(tx_resp->initial_rate),
1705                                             info);
1706
1707                 /* Don't assign the converted initial_rate, because driver
1708                  * TLC uses this and doesn't support the new FW rate
1709                  */
1710                 info->status.status_driver_data[1] =
1711                         (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate);
1712
1713                 /* Single frame failure in an AMPDU queue => send BAR */
1714                 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
1715                     !(info->flags & IEEE80211_TX_STAT_ACK) &&
1716                     !(info->flags & IEEE80211_TX_STAT_TX_FILTERED) && !flushed)
1717                         info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1718                 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1719
1720                 /* W/A FW bug: seq_ctl is wrong upon failure / BAR frame */
1721                 if (ieee80211_is_back_req(hdr->frame_control))
1722                         seq_ctl = 0;
1723                 else if (status != TX_STATUS_SUCCESS)
1724                         seq_ctl = le16_to_cpu(hdr->seq_ctrl);
1725
1726                 if (unlikely(!seq_ctl)) {
1727                         /*
1728                          * If it is an NDP, we can't update next_reclaim since
1729                          * its sequence control is 0. Note that for that same
1730                          * reason, NDPs are never sent to A-MPDU'able queues
1731                          * so that we can never have more than one freed frame
1732                          * for a single Tx resonse (see WARN_ON below).
1733                          */
1734                         if (ieee80211_is_qos_nullfunc(hdr->frame_control))
1735                                 is_ndp = true;
1736                 }
1737
1738                 /*
1739                  * TODO: this is not accurate if we are freeing more than one
1740                  * packet.
1741                  */
1742                 info->status.tx_time =
1743                         le16_to_cpu(tx_resp->wireless_media_time);
1744                 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1);
1745                 lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info);
1746                 info->status.status_driver_data[0] =
1747                         RS_DRV_DATA_PACK(lq_color, tx_resp->reduced_tpc);
1748
1749                 if (likely(!iwl_mvm_time_sync_frame(mvm, skb, hdr->addr1)))
1750                         ieee80211_tx_status_skb(mvm->hw, skb);
1751         }
1752
1753         /* This is an aggregation queue or might become one, so we use
1754          * the ssn since: ssn = wifi seq_num % 256.
1755          * The seq_ctl is the sequence control of the packet to which
1756          * this Tx response relates. But if there is a hole in the
1757          * bitmap of the BA we received, this Tx response may allow to
1758          * reclaim the hole and all the subsequent packets that were
1759          * already acked. In that case, seq_ctl != ssn, and the next
1760          * packet to be reclaimed will be ssn and not seq_ctl. In that
1761          * case, several packets will be reclaimed even if
1762          * frame_count = 1.
1763          *
1764          * The ssn is the index (% 256) of the latest packet that has
1765          * treated (acked / dropped) + 1.
1766          */
1767         next_reclaimed = ssn;
1768
1769         IWL_DEBUG_TX_REPLY(mvm,
1770                            "TXQ %d status %s (0x%08x)\n",
1771                            txq_id, iwl_mvm_get_tx_fail_reason(status), status);
1772
1773         IWL_DEBUG_TX_REPLY(mvm,
1774                            "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
1775                            le32_to_cpu(tx_resp->initial_rate),
1776                            tx_resp->failure_frame, SEQ_TO_INDEX(sequence),
1777                            ssn, next_reclaimed, seq_ctl);
1778
1779         rcu_read_lock();
1780
1781         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1782         /*
1783          * sta can't be NULL otherwise it'd mean that the sta has been freed in
1784          * the firmware while we still have packets for it in the Tx queues.
1785          */
1786         if (WARN_ON_ONCE(!sta))
1787                 goto out;
1788
1789         if (!IS_ERR(sta)) {
1790                 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1791
1792                 iwl_mvm_tx_airtime(mvm, mvmsta,
1793                                    le16_to_cpu(tx_resp->wireless_media_time));
1794
1795                 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS &&
1796                     mvmsta->sta_state < IEEE80211_STA_AUTHORIZED)
1797                         iwl_mvm_toggle_tx_ant(mvm, &mvmsta->tx_ant);
1798
1799                 if (sta->wme && tid != IWL_MGMT_TID) {
1800                         struct iwl_mvm_tid_data *tid_data =
1801                                 &mvmsta->tid_data[tid];
1802                         bool send_eosp_ndp = false;
1803
1804                         spin_lock_bh(&mvmsta->lock);
1805
1806                         if (!is_ndp) {
1807                                 tid_data->next_reclaimed = next_reclaimed;
1808                                 IWL_DEBUG_TX_REPLY(mvm,
1809                                                    "Next reclaimed packet:%d\n",
1810                                                    next_reclaimed);
1811                                 if (tid < IWL_MAX_TID_COUNT)
1812                                         iwl_mvm_count_mpdu(mvmsta, sta_id, 1,
1813                                                            true, 0);
1814                         } else {
1815                                 IWL_DEBUG_TX_REPLY(mvm,
1816                                                    "NDP - don't update next_reclaimed\n");
1817                         }
1818
1819                         iwl_mvm_check_ratid_empty(mvm, sta, tid);
1820
1821                         if (mvmsta->sleep_tx_count) {
1822                                 mvmsta->sleep_tx_count--;
1823                                 if (mvmsta->sleep_tx_count &&
1824                                     !iwl_mvm_tid_queued(mvm, tid_data)) {
1825                                         /*
1826                                          * The number of frames in the queue
1827                                          * dropped to 0 even if we sent less
1828                                          * frames than we thought we had on the
1829                                          * Tx queue.
1830                                          * This means we had holes in the BA
1831                                          * window that we just filled, ask
1832                                          * mac80211 to send EOSP since the
1833                                          * firmware won't know how to do that.
1834                                          * Send NDP and the firmware will send
1835                                          * EOSP notification that will trigger
1836                                          * a call to ieee80211_sta_eosp().
1837                                          */
1838                                         send_eosp_ndp = true;
1839                                 }
1840                         }
1841
1842                         spin_unlock_bh(&mvmsta->lock);
1843                         if (send_eosp_ndp) {
1844                                 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta,
1845                                         IEEE80211_FRAME_RELEASE_UAPSD,
1846                                         1, tid, false, false);
1847                                 mvmsta->sleep_tx_count = 0;
1848                                 ieee80211_send_eosp_nullfunc(sta, tid);
1849                         }
1850                 }
1851
1852                 if (mvmsta->next_status_eosp) {
1853                         mvmsta->next_status_eosp = false;
1854                         ieee80211_sta_eosp(sta);
1855                 }
1856         }
1857 out:
1858         rcu_read_unlock();
1859 }
1860
1861 #ifdef CONFIG_IWLWIFI_DEBUG
1862 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
1863 static const char *iwl_get_agg_tx_status(u16 status)
1864 {
1865         switch (status & AGG_TX_STATE_STATUS_MSK) {
1866         AGG_TX_STATE_(TRANSMITTED);
1867         AGG_TX_STATE_(UNDERRUN);
1868         AGG_TX_STATE_(BT_PRIO);
1869         AGG_TX_STATE_(FEW_BYTES);
1870         AGG_TX_STATE_(ABORT);
1871         AGG_TX_STATE_(TX_ON_AIR_DROP);
1872         AGG_TX_STATE_(LAST_SENT_TRY_CNT);
1873         AGG_TX_STATE_(LAST_SENT_BT_KILL);
1874         AGG_TX_STATE_(SCD_QUERY);
1875         AGG_TX_STATE_(TEST_BAD_CRC32);
1876         AGG_TX_STATE_(RESPONSE);
1877         AGG_TX_STATE_(DUMP_TX);
1878         AGG_TX_STATE_(DELAY_TX);
1879         }
1880
1881         return "UNKNOWN";
1882 }
1883
1884 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1885                                       struct iwl_rx_packet *pkt)
1886 {
1887         struct iwl_tx_resp *tx_resp = (void *)pkt->data;
1888         struct agg_tx_status *frame_status =
1889                 iwl_mvm_get_agg_status(mvm, tx_resp);
1890         int i;
1891         bool tirgger_timepoint = false;
1892
1893         for (i = 0; i < tx_resp->frame_count; i++) {
1894                 u16 fstatus = le16_to_cpu(frame_status[i].status);
1895                 /* In case one frame wasn't transmitted trigger time point */
1896                 tirgger_timepoint |= ((fstatus & AGG_TX_STATE_STATUS_MSK) !=
1897                                       AGG_TX_STATE_TRANSMITTED);
1898                 IWL_DEBUG_TX_REPLY(mvm,
1899                                    "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
1900                                    iwl_get_agg_tx_status(fstatus),
1901                                    fstatus & AGG_TX_STATE_STATUS_MSK,
1902                                    (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >>
1903                                         AGG_TX_STATE_TRY_CNT_POS,
1904                                    le16_to_cpu(frame_status[i].sequence));
1905         }
1906
1907         if (tirgger_timepoint)
1908                 iwl_dbg_tlv_time_point(&mvm->fwrt,
1909                                        IWL_FW_INI_TIME_POINT_TX_FAILED, NULL);
1910
1911 }
1912 #else
1913 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1914                                       struct iwl_rx_packet *pkt)
1915 {}
1916 #endif /* CONFIG_IWLWIFI_DEBUG */
1917
1918 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm,
1919                                   struct iwl_rx_packet *pkt)
1920 {
1921         struct iwl_tx_resp *tx_resp = (void *)pkt->data;
1922         int sta_id = IWL_TX_RES_GET_RA(tx_resp->ra_tid);
1923         int tid = IWL_TX_RES_GET_TID(tx_resp->ra_tid);
1924         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1925         struct iwl_mvm_sta *mvmsta;
1926         int queue = SEQ_TO_QUEUE(sequence);
1927         struct ieee80211_sta *sta;
1928
1929         if (WARN_ON_ONCE(queue < IWL_MVM_DQA_MIN_DATA_QUEUE &&
1930                          (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)))
1931                 return;
1932
1933         iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt);
1934
1935         rcu_read_lock();
1936
1937         mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1938
1939         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1940         if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta) || !sta->wme)) {
1941                 rcu_read_unlock();
1942                 return;
1943         }
1944
1945         if (!WARN_ON_ONCE(!mvmsta)) {
1946                 mvmsta->tid_data[tid].rate_n_flags =
1947                         le32_to_cpu(tx_resp->initial_rate);
1948                 mvmsta->tid_data[tid].tx_time =
1949                         le16_to_cpu(tx_resp->wireless_media_time);
1950                 mvmsta->tid_data[tid].lq_color =
1951                         TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info);
1952                 iwl_mvm_tx_airtime(mvm, mvmsta,
1953                                    le16_to_cpu(tx_resp->wireless_media_time));
1954         }
1955
1956         rcu_read_unlock();
1957 }
1958
1959 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1960 {
1961         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1962         struct iwl_tx_resp *tx_resp = (void *)pkt->data;
1963
1964         if (tx_resp->frame_count == 1)
1965                 iwl_mvm_rx_tx_cmd_single(mvm, pkt);
1966         else
1967                 iwl_mvm_rx_tx_cmd_agg(mvm, pkt);
1968 }
1969
1970 static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid,
1971                                int txq, int index,
1972                                struct ieee80211_tx_info *tx_info, u32 rate,
1973                                bool is_flush)
1974 {
1975         struct sk_buff_head reclaimed_skbs;
1976         struct iwl_mvm_tid_data *tid_data = NULL;
1977         struct ieee80211_sta *sta;
1978         struct iwl_mvm_sta *mvmsta = NULL;
1979         struct sk_buff *skb;
1980         int freed;
1981
1982         if (WARN_ONCE(sta_id >= mvm->fw->ucode_capa.num_stations ||
1983                       tid > IWL_MAX_TID_COUNT,
1984                       "sta_id %d tid %d", sta_id, tid))
1985                 return;
1986
1987         rcu_read_lock();
1988
1989         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1990
1991         /* Reclaiming frames for a station that has been deleted ? */
1992         if (WARN_ON_ONCE(!sta)) {
1993                 rcu_read_unlock();
1994                 return;
1995         }
1996
1997         __skb_queue_head_init(&reclaimed_skbs);
1998
1999         /*
2000          * Release all TFDs before the SSN, i.e. all TFDs in front of
2001          * block-ack window (we assume that they've been successfully
2002          * transmitted ... if not, it's too late anyway).
2003          */
2004         iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs, is_flush);
2005
2006         skb_queue_walk(&reclaimed_skbs, skb) {
2007                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2008
2009                 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
2010
2011                 memset(&info->status, 0, sizeof(info->status));
2012                 /* Packet was transmitted successfully, failures come as single
2013                  * frames because before failing a frame the firmware transmits
2014                  * it without aggregation at least once.
2015                  */
2016                 if (!is_flush)
2017                         info->flags |= IEEE80211_TX_STAT_ACK;
2018                 else
2019                         info->flags &= ~IEEE80211_TX_STAT_ACK;
2020         }
2021
2022         /*
2023          * It's possible to get a BA response after invalidating the rcu (rcu is
2024          * invalidated in order to prevent new Tx from being sent, but there may
2025          * be some frames already in-flight).
2026          * In this case we just want to reclaim, and could skip all the
2027          * sta-dependent stuff since it's in the middle of being removed
2028          * anyways.
2029          */
2030         if (IS_ERR(sta))
2031                 goto out;
2032
2033         mvmsta = iwl_mvm_sta_from_mac80211(sta);
2034         tid_data = &mvmsta->tid_data[tid];
2035
2036         if (tid_data->txq_id != txq) {
2037                 IWL_ERR(mvm,
2038                         "invalid reclaim request: Q %d, tid %d\n",
2039                         tid_data->txq_id, tid);
2040                 rcu_read_unlock();
2041                 return;
2042         }
2043
2044         spin_lock_bh(&mvmsta->lock);
2045
2046         tid_data->next_reclaimed = index;
2047
2048         iwl_mvm_check_ratid_empty(mvm, sta, tid);
2049
2050         freed = 0;
2051
2052         /* pack lq color from tid_data along the reduced txp */
2053         tx_info->status.status_driver_data[0] =
2054                 RS_DRV_DATA_PACK(tid_data->lq_color,
2055                                  tx_info->status.status_driver_data[0]);
2056         tx_info->status.status_driver_data[1] = (void *)(uintptr_t)rate;
2057
2058         skb_queue_walk(&reclaimed_skbs, skb) {
2059                 struct ieee80211_hdr *hdr = (void *)skb->data;
2060                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2061
2062                 if (!is_flush) {
2063                         if (ieee80211_is_data_qos(hdr->frame_control))
2064                                 freed++;
2065                         else
2066                                 WARN_ON_ONCE(tid != IWL_MAX_TID_COUNT);
2067                 }
2068
2069                 /* this is the first skb we deliver in this batch */
2070                 /* put the rate scaling data there */
2071                 if (freed == 1) {
2072                         info->flags |= IEEE80211_TX_STAT_AMPDU;
2073                         memcpy(&info->status, &tx_info->status,
2074                                sizeof(tx_info->status));
2075                         iwl_mvm_hwrate_to_tx_status(mvm->fw, rate, info);
2076                 }
2077         }
2078
2079         spin_unlock_bh(&mvmsta->lock);
2080
2081         /* We got a BA notif with 0 acked or scd_ssn didn't progress which is
2082          * possible (i.e. first MPDU in the aggregation wasn't acked)
2083          * Still it's important to update RS about sent vs. acked.
2084          */
2085         if (!is_flush && skb_queue_empty(&reclaimed_skbs) &&
2086             !iwl_mvm_has_tlc_offload(mvm)) {
2087                 struct ieee80211_chanctx_conf *chanctx_conf = NULL;
2088
2089                 /* no TLC offload, so non-MLD mode */
2090                 if (mvmsta->vif)
2091                         chanctx_conf =
2092                                 rcu_dereference(mvmsta->vif->bss_conf.chanctx_conf);
2093
2094                 if (WARN_ON_ONCE(!chanctx_conf))
2095                         goto out;
2096
2097                 tx_info->band = chanctx_conf->def.chan->band;
2098                 iwl_mvm_hwrate_to_tx_status(mvm->fw, rate, tx_info);
2099
2100                 IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n");
2101                 iwl_mvm_rs_tx_status(mvm, sta, tid, tx_info, false);
2102         }
2103
2104 out:
2105         rcu_read_unlock();
2106
2107         while (!skb_queue_empty(&reclaimed_skbs)) {
2108                 skb = __skb_dequeue(&reclaimed_skbs);
2109                 ieee80211_tx_status_skb(mvm->hw, skb);
2110         }
2111 }
2112
2113 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
2114 {
2115         struct iwl_rx_packet *pkt = rxb_addr(rxb);
2116         unsigned int pkt_len = iwl_rx_packet_payload_len(pkt);
2117         int sta_id, tid, txq, index;
2118         struct ieee80211_tx_info ba_info = {};
2119         struct iwl_mvm_ba_notif *ba_notif;
2120         struct iwl_mvm_tid_data *tid_data;
2121         struct iwl_mvm_sta *mvmsta;
2122
2123         ba_info.flags = IEEE80211_TX_STAT_AMPDU;
2124
2125         if (iwl_mvm_has_new_tx_api(mvm)) {
2126                 struct iwl_compressed_ba_notif *ba_res =
2127                         (void *)pkt->data;
2128                 u8 lq_color = TX_RES_RATE_TABLE_COL_GET(ba_res->tlc_rate_info);
2129                 u16 tfd_cnt;
2130                 int i;
2131
2132                 if (IWL_FW_CHECK(mvm, sizeof(*ba_res) > pkt_len,
2133                                  "short BA notification (%d)\n", pkt_len))
2134                         return;
2135
2136                 sta_id = ba_res->sta_id;
2137                 ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done);
2138                 ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed);
2139                 ba_info.status.tx_time =
2140                         (u16)le32_to_cpu(ba_res->wireless_time);
2141                 ba_info.status.status_driver_data[0] =
2142                         (void *)(uintptr_t)ba_res->reduced_txp;
2143
2144                 tfd_cnt = le16_to_cpu(ba_res->tfd_cnt);
2145                 if (!tfd_cnt)
2146                         return;
2147
2148                 if (IWL_FW_CHECK(mvm,
2149                                  struct_size(ba_res, tfd, tfd_cnt) > pkt_len,
2150                                  "short BA notification (tfds:%d, size:%d)\n",
2151                                  tfd_cnt, pkt_len))
2152                         return;
2153
2154                 IWL_DEBUG_TX_REPLY(mvm,
2155                                    "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n",
2156                                    sta_id, le32_to_cpu(ba_res->flags),
2157                                    le16_to_cpu(ba_res->txed),
2158                                    le16_to_cpu(ba_res->done));
2159
2160                 rcu_read_lock();
2161
2162                 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
2163                 /*
2164                  * It's possible to get a BA response after invalidating the rcu
2165                  * (rcu is invalidated in order to prevent new Tx from being
2166                  * sent, but there may be some frames already in-flight).
2167                  * In this case we just want to reclaim, and could skip all the
2168                  * sta-dependent stuff since it's in the middle of being removed
2169                  * anyways.
2170                  */
2171
2172                 /* Free per TID */
2173                 for (i = 0; i < tfd_cnt; i++) {
2174                         struct iwl_compressed_ba_tfd *ba_tfd = &ba_res->tfd[i];
2175
2176                         tid = ba_tfd->tid;
2177                         if (tid == IWL_MGMT_TID)
2178                                 tid = IWL_MAX_TID_COUNT;
2179
2180                         if (mvmsta)
2181                                 mvmsta->tid_data[i].lq_color = lq_color;
2182
2183                         iwl_mvm_tx_reclaim(mvm, sta_id, tid,
2184                                            (int)(le16_to_cpu(ba_tfd->q_num)),
2185                                            le16_to_cpu(ba_tfd->tfd_index),
2186                                            &ba_info,
2187                                            le32_to_cpu(ba_res->tx_rate), false);
2188                 }
2189
2190                 if (mvmsta) {
2191                         iwl_mvm_tx_airtime(mvm, mvmsta,
2192                                            le32_to_cpu(ba_res->wireless_time));
2193
2194                         iwl_mvm_count_mpdu(mvmsta, sta_id,
2195                                            le16_to_cpu(ba_res->txed), true, 0);
2196                 }
2197                 rcu_read_unlock();
2198                 return;
2199         }
2200
2201         ba_notif = (void *)pkt->data;
2202         sta_id = ba_notif->sta_id;
2203         tid = ba_notif->tid;
2204         /* "flow" corresponds to Tx queue */
2205         txq = le16_to_cpu(ba_notif->scd_flow);
2206         /* "ssn" is start of block-ack Tx window, corresponds to index
2207          * (in Tx queue's circular buffer) of first TFD/frame in window */
2208         index = le16_to_cpu(ba_notif->scd_ssn);
2209
2210         rcu_read_lock();
2211         mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
2212         if (IWL_FW_CHECK(mvm, !mvmsta,
2213                          "invalid STA ID %d in BA notif\n",
2214                          sta_id)) {
2215                 rcu_read_unlock();
2216                 return;
2217         }
2218
2219         tid_data = &mvmsta->tid_data[tid];
2220
2221         ba_info.status.ampdu_ack_len = ba_notif->txed_2_done;
2222         ba_info.status.ampdu_len = ba_notif->txed;
2223         ba_info.status.tx_time = tid_data->tx_time;
2224         ba_info.status.status_driver_data[0] =
2225                 (void *)(uintptr_t)ba_notif->reduced_txp;
2226
2227         rcu_read_unlock();
2228
2229         IWL_DEBUG_TX_REPLY(mvm,
2230                            "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
2231                            ba_notif->sta_addr, ba_notif->sta_id);
2232
2233         IWL_DEBUG_TX_REPLY(mvm,
2234                            "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
2235                            ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl),
2236                            le64_to_cpu(ba_notif->bitmap), txq, index,
2237                            ba_notif->txed, ba_notif->txed_2_done);
2238
2239         IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n",
2240                            ba_notif->reduced_txp);
2241
2242         iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info,
2243                            tid_data->rate_n_flags, false);
2244 }
2245
2246 /*
2247  * Note that there are transports that buffer frames before they reach
2248  * the firmware. This means that after flush_tx_path is called, the
2249  * queue might not be empty. The race-free way to handle this is to:
2250  * 1) set the station as draining
2251  * 2) flush the Tx path
2252  * 3) wait for the transport queues to be empty
2253  */
2254 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk)
2255 {
2256         int ret;
2257         struct iwl_tx_path_flush_cmd_v1 flush_cmd = {
2258                 .queues_ctl = cpu_to_le32(tfd_msk),
2259                 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH),
2260         };
2261
2262         WARN_ON(iwl_mvm_has_new_tx_api(mvm));
2263         ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, 0,
2264                                    sizeof(flush_cmd), &flush_cmd);
2265         if (ret)
2266                 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
2267         return ret;
2268 }
2269
2270 int iwl_mvm_flush_sta_tids(struct iwl_mvm *mvm, u32 sta_id, u16 tids)
2271 {
2272         int ret;
2273         struct iwl_tx_path_flush_cmd_rsp *rsp;
2274         struct iwl_tx_path_flush_cmd flush_cmd = {
2275                 .sta_id = cpu_to_le32(sta_id),
2276                 .tid_mask = cpu_to_le16(tids),
2277         };
2278
2279         struct iwl_host_cmd cmd = {
2280                 .id = TXPATH_FLUSH,
2281                 .len = { sizeof(flush_cmd), },
2282                 .data = { &flush_cmd, },
2283         };
2284
2285         WARN_ON(!iwl_mvm_has_new_tx_api(mvm));
2286
2287         if (iwl_fw_lookup_notif_ver(mvm->fw, LONG_GROUP, TXPATH_FLUSH, 0) > 0)
2288                 cmd.flags |= CMD_WANT_SKB | CMD_SEND_IN_RFKILL;
2289
2290         IWL_DEBUG_TX_QUEUES(mvm, "flush for sta id %d tid mask 0x%x\n",
2291                             sta_id, tids);
2292
2293         ret = iwl_mvm_send_cmd(mvm, &cmd);
2294
2295         if (ret) {
2296                 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
2297                 return ret;
2298         }
2299
2300         if (cmd.flags & CMD_WANT_SKB) {
2301                 int i;
2302                 int num_flushed_queues;
2303
2304                 if (WARN_ON_ONCE(iwl_rx_packet_payload_len(cmd.resp_pkt) != sizeof(*rsp))) {
2305                         ret = -EIO;
2306                         goto free_rsp;
2307                 }
2308
2309                 rsp = (void *)cmd.resp_pkt->data;
2310
2311                 if (WARN_ONCE(le16_to_cpu(rsp->sta_id) != sta_id,
2312                               "sta_id %d != rsp_sta_id %d",
2313                               sta_id, le16_to_cpu(rsp->sta_id))) {
2314                         ret = -EIO;
2315                         goto free_rsp;
2316                 }
2317
2318                 num_flushed_queues = le16_to_cpu(rsp->num_flushed_queues);
2319                 if (WARN_ONCE(num_flushed_queues > IWL_TX_FLUSH_QUEUE_RSP,
2320                               "num_flushed_queues %d", num_flushed_queues)) {
2321                         ret = -EIO;
2322                         goto free_rsp;
2323                 }
2324
2325                 for (i = 0; i < num_flushed_queues; i++) {
2326                         struct ieee80211_tx_info tx_info = {};
2327                         struct iwl_flush_queue_info *queue_info = &rsp->queues[i];
2328                         int tid = le16_to_cpu(queue_info->tid);
2329                         int read_before = le16_to_cpu(queue_info->read_before_flush);
2330                         int read_after = le16_to_cpu(queue_info->read_after_flush);
2331                         int queue_num = le16_to_cpu(queue_info->queue_num);
2332
2333                         if (tid == IWL_MGMT_TID)
2334                                 tid = IWL_MAX_TID_COUNT;
2335
2336                         IWL_DEBUG_TX_QUEUES(mvm,
2337                                             "tid %d queue_id %d read-before %d read-after %d\n",
2338                                             tid, queue_num, read_before, read_after);
2339
2340                         iwl_mvm_tx_reclaim(mvm, sta_id, tid, queue_num, read_after,
2341                                            &tx_info, 0, true);
2342                 }
2343 free_rsp:
2344                 iwl_free_resp(&cmd);
2345         }
2346         return ret;
2347 }
2348
2349 int iwl_mvm_flush_sta(struct iwl_mvm *mvm, u32 sta_id, u32 tfd_queue_mask)
2350 {
2351         if (iwl_mvm_has_new_tx_api(mvm))
2352                 return iwl_mvm_flush_sta_tids(mvm, sta_id, 0xffff);
2353
2354         return iwl_mvm_flush_tx_path(mvm, tfd_queue_mask);
2355 }