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, 2018-2023 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-eeprom-parse.h"
  16 #include "mvm.h"
  17 #include "sta.h"
  18 #include "time-sync.h"
  19
  20 static void
  21 iwl_mvm_bar_check_trigger(struct iwl_mvm *mvm, const u8 *addr,
  22                           u16 tid, u16 ssn)
  23 {
  24         struct iwl_fw_dbg_trigger_tlv *trig;
  25         struct iwl_fw_dbg_trigger_ba *ba_trig;
  26
  27         trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, FW_DBG_TRIGGER_BA);
  28         if (!trig)
  29                 return;
  30
  31         ba_trig = (void *)trig->data;
  32
  33         if (!(le16_to_cpu(ba_trig->tx_bar) & BIT(tid)))
  34                 return;
  35
  36         iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
  37                                 "BAR sent to %pM, tid %d, ssn %d",
  38                                 addr, tid, ssn);
  39 }
  40
  41 #define OPT_HDR(type, skb, off) \
  42         (type *)(skb_network_header(skb) + (off))
  43
  44 static u32 iwl_mvm_tx_csum(struct iwl_mvm *mvm, struct sk_buff *skb,
  45                            struct ieee80211_tx_info *info,
  46                            bool amsdu)
  47 {
  48         struct ieee80211_hdr *hdr = (void *)skb->data;
  49         u16 mh_len = ieee80211_hdrlen(hdr->frame_control);
  50         u16 offload_assist = 0;
  51 #if IS_ENABLED(CONFIG_INET)
  52         u8 protocol = 0;
  53
  54         /* Do not compute checksum if already computed */
  55         if (skb->ip_summed != CHECKSUM_PARTIAL)
  56                 goto out;
  57
  58         /* We do not expect to be requested to csum stuff we do not support */
  59         if (WARN_ONCE(!(mvm->hw->netdev_features & IWL_TX_CSUM_NETIF_FLAGS) ||
  60                       (skb->protocol != htons(ETH_P_IP) &&
  61                        skb->protocol != htons(ETH_P_IPV6)),
  62                       "No support for requested checksum\n")) {
  63                 skb_checksum_help(skb);
  64                 goto out;
  65         }
  66
  67         if (skb->protocol == htons(ETH_P_IP)) {
  68                 protocol = ip_hdr(skb)->protocol;
  69         } else {
  70 #if IS_ENABLED(CONFIG_IPV6)
  71                 struct ipv6hdr *ipv6h =
  72                         (struct ipv6hdr *)skb_network_header(skb);
  73                 unsigned int off = sizeof(*ipv6h);
  74
  75                 protocol = ipv6h->nexthdr;
  76                 while (protocol != NEXTHDR_NONE && ipv6_ext_hdr(protocol)) {
  77                         struct ipv6_opt_hdr *hp;
  78
  79                         /* only supported extension headers */
  80                         if (protocol != NEXTHDR_ROUTING &&
  81                             protocol != NEXTHDR_HOP &&
  82                             protocol != NEXTHDR_DEST) {
  83                                 skb_checksum_help(skb);
  84                                 goto out;
  85                         }
  86
  87                         hp = OPT_HDR(struct ipv6_opt_hdr, skb, off);
  88                         protocol = hp->nexthdr;
  89                         off += ipv6_optlen(hp);
  90                 }
  91                 /* if we get here - protocol now should be TCP/UDP */
  92 #endif
  93         }
  94
  95         if (protocol != IPPROTO_TCP && protocol != IPPROTO_UDP) {
  96                 WARN_ON_ONCE(1);
  97                 skb_checksum_help(skb);
  98                 goto out;
  99         }
 100
 101         /* enable L4 csum */
 102         offload_assist |= BIT(TX_CMD_OFFLD_L4_EN);
 103
 104         /*
 105          * Set offset to IP header (snap).
 106          * We don't support tunneling so no need to take care of inner header.
 107          * Size is in words.
 108          */
 109         offload_assist |= (4 << TX_CMD_OFFLD_IP_HDR);
 110
 111         /* Do IPv4 csum for AMSDU only (no IP csum for Ipv6) */
 112         if (skb->protocol == htons(ETH_P_IP) && amsdu) {
 113                 ip_hdr(skb)->check = 0;
 114                 offload_assist |= BIT(TX_CMD_OFFLD_L3_EN);
 115         }
 116
 117         /* reset UDP/TCP header csum */
 118         if (protocol == IPPROTO_TCP)
 119                 tcp_hdr(skb)->check = 0;
 120         else
 121                 udp_hdr(skb)->check = 0;
 122
 123 out:
 124 #endif
 125         /*
 126          * mac header len should include IV, size is in words unless
 127          * the IV is added by the firmware like in WEP.
 128          * In new Tx API, the IV is always added by the firmware.
 129          */
 130         if (!iwl_mvm_has_new_tx_api(mvm) && info->control.hw_key &&
 131             info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP40 &&
 132             info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP104)
 133                 mh_len += info->control.hw_key->iv_len;
 134         mh_len /= 2;
 135         offload_assist |= mh_len << TX_CMD_OFFLD_MH_SIZE;
 136
 137         if (amsdu)
 138                 offload_assist |= BIT(TX_CMD_OFFLD_AMSDU);
 139         else if (ieee80211_hdrlen(hdr->frame_control) % 4)
 140                 /* padding is inserted later in transport */
 141                 offload_assist |= BIT(TX_CMD_OFFLD_PAD);
 142
 143         return offload_assist;
 144 }
 145
 146 /*
 147  * Sets most of the Tx cmd's fields
 148  */
 149 void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb,
 150                         struct iwl_tx_cmd *tx_cmd,
 151                         struct ieee80211_tx_info *info, u8 sta_id)
 152 {
 153         struct ieee80211_hdr *hdr = (void *)skb->data;
 154         __le16 fc = hdr->frame_control;
 155         u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags);
 156         u32 len = skb->len + FCS_LEN;
 157         bool amsdu = false;
 158         u8 ac;
 159
 160         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) ||
 161             (ieee80211_is_probe_resp(fc) &&
 162              !is_multicast_ether_addr(hdr->addr1)))
 163                 tx_flags |= TX_CMD_FLG_ACK;
 164         else
 165                 tx_flags &= ~TX_CMD_FLG_ACK;
 166
 167         if (ieee80211_is_probe_resp(fc))
 168                 tx_flags |= TX_CMD_FLG_TSF;
 169
 170         if (ieee80211_has_morefrags(fc))
 171                 tx_flags |= TX_CMD_FLG_MORE_FRAG;
 172
 173         if (ieee80211_is_data_qos(fc)) {
 174                 u8 *qc = ieee80211_get_qos_ctl(hdr);
 175                 tx_cmd->tid_tspec = qc[0] & 0xf;
 176                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
 177                 amsdu = *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT;
 178         } else if (ieee80211_is_back_req(fc)) {
 179                 struct ieee80211_bar *bar = (void *)skb->data;
 180                 u16 control = le16_to_cpu(bar->control);
 181                 u16 ssn = le16_to_cpu(bar->start_seq_num);
 182
 183                 tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR;
 184                 tx_cmd->tid_tspec = (control &
 185                                      IEEE80211_BAR_CTRL_TID_INFO_MASK) >>
 186                         IEEE80211_BAR_CTRL_TID_INFO_SHIFT;
 187                 WARN_ON_ONCE(tx_cmd->tid_tspec >= IWL_MAX_TID_COUNT);
 188                 iwl_mvm_bar_check_trigger(mvm, bar->ra, tx_cmd->tid_tspec,
 189                                           ssn);
 190         } else {
 191                 if (ieee80211_is_data(fc))
 192                         tx_cmd->tid_tspec = IWL_TID_NON_QOS;
 193                 else
 194                         tx_cmd->tid_tspec = IWL_MAX_TID_COUNT;
 195
 196                 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
 197                         tx_flags |= TX_CMD_FLG_SEQ_CTL;
 198                 else
 199                         tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
 200         }
 201
 202         /* Default to 0 (BE) when tid_spec is set to IWL_MAX_TID_COUNT */
 203         if (tx_cmd->tid_tspec < IWL_MAX_TID_COUNT)
 204                 ac = tid_to_mac80211_ac[tx_cmd->tid_tspec];
 205         else
 206                 ac = tid_to_mac80211_ac[0];
 207
 208         tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) <<
 209                         TX_CMD_FLG_BT_PRIO_POS;
 210
 211         if (ieee80211_is_mgmt(fc)) {
 212                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
 213                         tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_ASSOC);
 214                 else if (ieee80211_is_action(fc))
 215                         tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
 216                 else
 217                         tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
 218
 219                 /* The spec allows Action frames in A-MPDU, we don't support
 220                  * it
 221                  */
 222                 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU);
 223         } else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) {
 224                 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
 225         } else {
 226                 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
 227         }
 228
 229         if (ieee80211_is_data(fc) && len > mvm->rts_threshold &&
 230             !is_multicast_ether_addr(hdr->addr1))
 231                 tx_flags |= TX_CMD_FLG_PROT_REQUIRE;
 232
 233         if (fw_has_capa(&mvm->fw->ucode_capa,
 234                         IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT) &&
 235             ieee80211_action_contains_tpc(skb))
 236                 tx_flags |= TX_CMD_FLG_WRITE_TX_POWER;
 237
 238         tx_cmd->tx_flags = cpu_to_le32(tx_flags);
 239         /* Total # bytes to be transmitted - PCIe code will adjust for A-MSDU */
 240         tx_cmd->len = cpu_to_le16((u16)skb->len);
 241         tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
 242         tx_cmd->sta_id = sta_id;
 243
 244         tx_cmd->offload_assist =
 245                 cpu_to_le16(iwl_mvm_tx_csum(mvm, skb, info, amsdu));
 246 }
 247
 248 static u32 iwl_mvm_get_tx_ant(struct iwl_mvm *mvm,
 249                               struct ieee80211_tx_info *info,
 250                               struct ieee80211_sta *sta, __le16 fc)
 251 {
 252         if (info->band == NL80211_BAND_2GHZ &&
 253             !iwl_mvm_bt_coex_is_shared_ant_avail(mvm))
 254                 return mvm->cfg->non_shared_ant << RATE_MCS_ANT_POS;
 255
 256         if (sta && ieee80211_is_data(fc)) {
 257                 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 258
 259                 return BIT(mvmsta->tx_ant) << RATE_MCS_ANT_POS;
 260         }
 261
 262         return BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS;
 263 }
 264
 265 static u32 iwl_mvm_get_inject_tx_rate(struct iwl_mvm *mvm,
 266                                       struct ieee80211_tx_info *info)
 267 {
 268         struct ieee80211_tx_rate *rate = &info->control.rates[0];
 269         u32 result;
 270
 271         /*
 272          * we only care about legacy/HT/VHT so far, so we can
 273          * build in v1 and use iwl_new_rate_from_v1()
 274          */
 275
 276         if (rate->flags & IEEE80211_TX_RC_VHT_MCS) {
 277                 u8 mcs = ieee80211_rate_get_vht_mcs(rate);
 278                 u8 nss = ieee80211_rate_get_vht_nss(rate);
 279
 280                 result = RATE_MCS_VHT_MSK_V1;
 281                 result |= u32_encode_bits(mcs, RATE_VHT_MCS_RATE_CODE_MSK);
 282                 result |= u32_encode_bits(nss, RATE_MCS_NSS_MSK);
 283                 if (rate->flags & IEEE80211_TX_RC_SHORT_GI)
 284                         result |= RATE_MCS_SGI_MSK_V1;
 285                 if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
 286                         result |= u32_encode_bits(1, RATE_MCS_CHAN_WIDTH_MSK_V1);
 287                 else if (rate->flags & IEEE80211_TX_RC_80_MHZ_WIDTH)
 288                         result |= u32_encode_bits(2, RATE_MCS_CHAN_WIDTH_MSK_V1);
 289                 else if (rate->flags & IEEE80211_TX_RC_160_MHZ_WIDTH)
 290                         result |= u32_encode_bits(3, RATE_MCS_CHAN_WIDTH_MSK_V1);
 291         } else if (rate->flags & IEEE80211_TX_RC_MCS) {
 292                 result = RATE_MCS_HT_MSK_V1;
 293                 result |= u32_encode_bits(rate->idx,
 294                                           RATE_HT_MCS_RATE_CODE_MSK_V1 |
 295                                           RATE_HT_MCS_NSS_MSK_V1);
 296                 if (rate->flags & IEEE80211_TX_RC_SHORT_GI)
 297                         result |= RATE_MCS_SGI_MSK_V1;
 298                 if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
 299                         result |= u32_encode_bits(1, RATE_MCS_CHAN_WIDTH_MSK_V1);
 300                 if (info->flags & IEEE80211_TX_CTL_LDPC)
 301                         result |= RATE_MCS_LDPC_MSK_V1;
 302                 if (u32_get_bits(info->flags, IEEE80211_TX_CTL_STBC))
 303                         result |= RATE_MCS_STBC_MSK;
 304         } else {
 305                 return 0;
 306         }
 307
 308         if (iwl_fw_lookup_notif_ver(mvm->fw, LONG_GROUP, TX_CMD, 0) > 6)
 309                 return iwl_new_rate_from_v1(result);
 310         return result;
 311 }
 312
 313 static u32 iwl_mvm_get_tx_rate(struct iwl_mvm *mvm,
 314                                struct ieee80211_tx_info *info,
 315                                struct ieee80211_sta *sta, __le16 fc)
 316 {
 317         int rate_idx = -1;
 318         u8 rate_plcp;
 319         u32 rate_flags = 0;
 320         bool is_cck;
 321
 322         if (unlikely(info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT)) {
 323                 u32 result = iwl_mvm_get_inject_tx_rate(mvm, info);
 324
 325                 if (result)
 326                         return result;
 327                 rate_idx = info->control.rates[0].idx;
 328         } else if (!ieee80211_hw_check(mvm->hw, HAS_RATE_CONTROL)) {
 329                 /* info->control is only relevant for non HW rate control */
 330
 331                 /* HT rate doesn't make sense for a non data frame */
 332                 WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS &&
 333                           !ieee80211_is_data(fc),
 334                           "Got a HT rate (flags:0x%x/mcs:%d/fc:0x%x/state:%d) for a non data frame\n",
 335                           info->control.rates[0].flags,
 336                           info->control.rates[0].idx,
 337                           le16_to_cpu(fc),
 338                           sta ? iwl_mvm_sta_from_mac80211(sta)->sta_state : -1);
 339
 340                 rate_idx = info->control.rates[0].idx;
 341
 342                 /* For non 2 GHZ band, remap mac80211 rate indices into driver
 343                  * indices.
 344                  */
 345                 if (info->band != NL80211_BAND_2GHZ ||
 346                     (info->flags & IEEE80211_TX_CTL_NO_CCK_RATE))
 347                         rate_idx += IWL_FIRST_OFDM_RATE;
 348
 349                 /* For 2.4 GHZ band, check that there is no need to remap */
 350                 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
 351         }
 352
 353         /* if the rate isn't a well known legacy rate, take the lowest one */
 354         if (rate_idx < 0 || rate_idx >= IWL_RATE_COUNT_LEGACY)
 355                 rate_idx = iwl_mvm_mac_ctxt_get_lowest_rate(mvm,
 356                                                             info,
 357                                                             info->control.vif);
 358
 359         /* Get PLCP rate for tx_cmd->rate_n_flags */
 360         rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(mvm->fw, rate_idx);
 361         is_cck = (rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE);
 362
 363         /* Set CCK or OFDM flag */
 364         if (iwl_fw_lookup_cmd_ver(mvm->fw, TX_CMD, 0) > 8) {
 365                 if (!is_cck)
 366                         rate_flags |= RATE_MCS_LEGACY_OFDM_MSK;
 367                 else
 368                         rate_flags |= RATE_MCS_CCK_MSK;
 369         } else if (is_cck) {
 370                 rate_flags |= RATE_MCS_CCK_MSK_V1;
 371         }
 372
 373         return (u32)rate_plcp | rate_flags;
 374 }
 375
 376 static u32 iwl_mvm_get_tx_rate_n_flags(struct iwl_mvm *mvm,
 377                                        struct ieee80211_tx_info *info,
 378                                        struct ieee80211_sta *sta, __le16 fc)
 379 {
 380         return iwl_mvm_get_tx_rate(mvm, info, sta, fc) |
 381                 iwl_mvm_get_tx_ant(mvm, info, sta, fc);
 382 }
 383
 384 /*
 385  * Sets the fields in the Tx cmd that are rate related
 386  */
 387 void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd,
 388                             struct ieee80211_tx_info *info,
 389                             struct ieee80211_sta *sta, __le16 fc)
 390 {
 391         /* Set retry limit on RTS packets */
 392         tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT;
 393
 394         /* Set retry limit on DATA packets and Probe Responses*/
 395         if (ieee80211_is_probe_resp(fc)) {
 396                 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT;
 397                 tx_cmd->rts_retry_limit =
 398                         min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit);
 399         } else if (ieee80211_is_back_req(fc)) {
 400                 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT;
 401         } else {
 402                 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY;
 403         }
 404
 405         /*
 406          * for data packets, rate info comes from the table inside the fw. This
 407          * table is controlled by LINK_QUALITY commands
 408          */
 409
 410         if (likely(ieee80211_is_data(fc) && sta &&
 411                    !(info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT))) {
 412                 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 413
 414                 if (mvmsta->sta_state >= IEEE80211_STA_AUTHORIZED) {
 415                         tx_cmd->initial_rate_index = 0;
 416                         tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE);
 417                         return;
 418                 }
 419         } else if (ieee80211_is_back_req(fc)) {
 420                 tx_cmd->tx_flags |=
 421                         cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR);
 422         }
 423
 424         /* Set the rate in the TX cmd */
 425         tx_cmd->rate_n_flags =
 426                 cpu_to_le32(iwl_mvm_get_tx_rate_n_flags(mvm, info, sta, fc));
 427 }
 428
 429 static inline void iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info *info,
 430                                          u8 *crypto_hdr)
 431 {
 432         struct ieee80211_key_conf *keyconf = info->control.hw_key;
 433         u64 pn;
 434
 435         pn = atomic64_inc_return(&keyconf->tx_pn);
 436         crypto_hdr[0] = pn;
 437         crypto_hdr[2] = 0;
 438         crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6);
 439         crypto_hdr[1] = pn >> 8;
 440         crypto_hdr[4] = pn >> 16;
 441         crypto_hdr[5] = pn >> 24;
 442         crypto_hdr[6] = pn >> 32;
 443         crypto_hdr[7] = pn >> 40;
 444 }
 445
 446 /*
 447  * Sets the fields in the Tx cmd that are crypto related
 448  */
 449 static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm,
 450                                       struct ieee80211_tx_info *info,
 451                                       struct iwl_tx_cmd *tx_cmd,
 452                                       struct sk_buff *skb_frag,
 453                                       int hdrlen)
 454 {
 455         struct ieee80211_key_conf *keyconf = info->control.hw_key;
 456         u8 *crypto_hdr = skb_frag->data + hdrlen;
 457         enum iwl_tx_cmd_sec_ctrl type = TX_CMD_SEC_CCM;
 458         u64 pn;
 459
 460         switch (keyconf->cipher) {
 461         case WLAN_CIPHER_SUITE_CCMP:
 462                 iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd);
 463                 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr);
 464                 break;
 465
 466         case WLAN_CIPHER_SUITE_TKIP:
 467                 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
 468                 pn = atomic64_inc_return(&keyconf->tx_pn);
 469                 ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn);
 470                 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
 471                 break;
 472
 473         case WLAN_CIPHER_SUITE_WEP104:
 474                 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
 475                 fallthrough;
 476         case WLAN_CIPHER_SUITE_WEP40:
 477                 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP |
 478                         ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) &
 479                           TX_CMD_SEC_WEP_KEY_IDX_MSK);
 480
 481                 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
 482                 break;
 483         case WLAN_CIPHER_SUITE_GCMP:
 484         case WLAN_CIPHER_SUITE_GCMP_256:
 485                 type = TX_CMD_SEC_GCMP;
 486                 fallthrough;
 487         case WLAN_CIPHER_SUITE_CCMP_256:
 488                 /* TODO: Taking the key from the table might introduce a race
 489                  * when PTK rekeying is done, having an old packets with a PN
 490                  * based on the old key but the message encrypted with a new
 491                  * one.
 492                  * Need to handle this.
 493                  */
 494                 tx_cmd->sec_ctl |= type | TX_CMD_SEC_KEY_FROM_TABLE;
 495                 tx_cmd->key[0] = keyconf->hw_key_idx;
 496                 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr);
 497                 break;
 498         default:
 499                 tx_cmd->sec_ctl |= TX_CMD_SEC_EXT;
 500         }
 501 }
 502
 503 /*
 504  * Allocates and sets the Tx cmd the driver data pointers in the skb
 505  */
 506 static struct iwl_device_tx_cmd *
 507 iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb,
 508                       struct ieee80211_tx_info *info, int hdrlen,
 509                       struct ieee80211_sta *sta, u8 sta_id)
 510 {
 511         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 512         struct iwl_device_tx_cmd *dev_cmd;
 513         struct iwl_tx_cmd *tx_cmd;
 514
 515         dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans);
 516
 517         if (unlikely(!dev_cmd))
 518                 return NULL;
 519
 520         dev_cmd->hdr.cmd = TX_CMD;
 521
 522         if (iwl_mvm_has_new_tx_api(mvm)) {
 523                 u32 rate_n_flags = 0;
 524                 u16 flags = 0;
 525                 struct iwl_mvm_sta *mvmsta = sta ?
 526                         iwl_mvm_sta_from_mac80211(sta) : NULL;
 527                 bool amsdu = false;
 528
 529                 if (ieee80211_is_data_qos(hdr->frame_control)) {
 530                         u8 *qc = ieee80211_get_qos_ctl(hdr);
 531
 532                         amsdu = *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT;
 533                 }
 534
 535                 if (!info->control.hw_key)
 536                         flags |= IWL_TX_FLAGS_ENCRYPT_DIS;
 537
 538                 /*
 539                  * For data packets rate info comes from the fw. Only
 540                  * set rate/antenna during connection establishment or in case
 541                  * no station is given.
 542                  */
 543                 if (!sta || !ieee80211_is_data(hdr->frame_control) ||
 544                     mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) {
 545                         flags |= IWL_TX_FLAGS_CMD_RATE;
 546                         rate_n_flags =
 547                                 iwl_mvm_get_tx_rate_n_flags(mvm, info, sta,
 548                                                             hdr->frame_control);
 549                 }
 550
 551                 if (mvm->trans->trans_cfg->device_family >=
 552                     IWL_DEVICE_FAMILY_AX210) {
 553                         struct iwl_tx_cmd_gen3 *cmd = (void *)dev_cmd->payload;
 554                         u32 offload_assist = iwl_mvm_tx_csum(mvm, skb,
 555                                                              info, amsdu);
 556
 557                         cmd->offload_assist = cpu_to_le32(offload_assist);
 558
 559                         /* Total # bytes to be transmitted */
 560                         cmd->len = cpu_to_le16((u16)skb->len);
 561
 562                         /* Copy MAC header from skb into command buffer */
 563                         memcpy(cmd->hdr, hdr, hdrlen);
 564
 565                         cmd->flags = cpu_to_le16(flags);
 566                         cmd->rate_n_flags = cpu_to_le32(rate_n_flags);
 567                 } else {
 568                         struct iwl_tx_cmd_gen2 *cmd = (void *)dev_cmd->payload;
 569                         u16 offload_assist = iwl_mvm_tx_csum(mvm, skb,
 570                                                              info, amsdu);
 571
 572                         cmd->offload_assist = cpu_to_le16(offload_assist);
 573
 574                         /* Total # bytes to be transmitted */
 575                         cmd->len = cpu_to_le16((u16)skb->len);
 576
 577                         /* Copy MAC header from skb into command buffer */
 578                         memcpy(cmd->hdr, hdr, hdrlen);
 579
 580                         cmd->flags = cpu_to_le32(flags);
 581                         cmd->rate_n_flags = cpu_to_le32(rate_n_flags);
 582                 }
 583                 goto out;
 584         }
 585
 586         tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
 587
 588         if (info->control.hw_key)
 589                 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen);
 590
 591         iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id);
 592
 593         iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control);
 594
 595         /* Copy MAC header from skb into command buffer */
 596         memcpy(tx_cmd->hdr, hdr, hdrlen);
 597
 598 out:
 599         return dev_cmd;
 600 }
 601
 602 static void iwl_mvm_skb_prepare_status(struct sk_buff *skb,
 603                                        struct iwl_device_tx_cmd *cmd)
 604 {
 605         struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb);
 606
 607         memset(&skb_info->status, 0, sizeof(skb_info->status));
 608         memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data));
 609
 610         skb_info->driver_data[1] = cmd;
 611 }
 612
 613 static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm,
 614                                       struct iwl_mvm_vif_link_info *link,
 615                                       struct ieee80211_tx_info *info,
 616                                       struct sk_buff *skb)
 617 {
 618         struct ieee80211_hdr *hdr = (void *)skb->data;
 619         __le16 fc = hdr->frame_control;
 620
 621         switch (info->control.vif->type) {
 622         case NL80211_IFTYPE_AP:
 623         case NL80211_IFTYPE_ADHOC:
 624                 /*
 625                  * Non-bufferable frames use the broadcast station, thus they
 626                  * use the probe queue.
 627                  * Also take care of the case where we send a deauth to a
 628                  * station that we don't have, or similarly an association
 629                  * response (with non-success status) for a station we can't
 630                  * accept.
 631                  * Also, disassociate frames might happen, particular with
 632                  * reason 7 ("Class 3 frame received from nonassociated STA").
 633                  */
 634                 if (ieee80211_is_mgmt(fc) &&
 635                     (!ieee80211_is_bufferable_mmpdu(skb) ||
 636                      ieee80211_is_deauth(fc) || ieee80211_is_disassoc(fc)))
 637                         return link->mgmt_queue;
 638
 639                 if (!ieee80211_has_order(fc) && !ieee80211_is_probe_req(fc) &&
 640                     is_multicast_ether_addr(hdr->addr1))
 641                         return link->cab_queue;
 642
 643                 WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC,
 644                           "fc=0x%02x", le16_to_cpu(fc));
 645                 return link->mgmt_queue;
 646         case NL80211_IFTYPE_P2P_DEVICE:
 647                 if (ieee80211_is_mgmt(fc))
 648                         return mvm->p2p_dev_queue;
 649
 650                 WARN_ON_ONCE(1);
 651                 return mvm->p2p_dev_queue;
 652         default:
 653                 WARN_ONCE(1, "Not a ctrl vif, no available queue\n");
 654                 return -1;
 655         }
 656 }
 657
 658 static void iwl_mvm_probe_resp_set_noa(struct iwl_mvm *mvm,
 659                                        struct sk_buff *skb)
 660 {
 661         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 662         struct iwl_mvm_vif *mvmvif =
 663                 iwl_mvm_vif_from_mac80211(info->control.vif);
 664         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
 665         int base_len = (u8 *)mgmt->u.probe_resp.variable - (u8 *)mgmt;
 666         struct iwl_probe_resp_data *resp_data;
 667         const u8 *ie;
 668         u8 *pos;
 669         u8 match[] = {
 670                 (WLAN_OUI_WFA >> 16) & 0xff,
 671                 (WLAN_OUI_WFA >> 8) & 0xff,
 672                 WLAN_OUI_WFA & 0xff,
 673                 WLAN_OUI_TYPE_WFA_P2P,
 674         };
 675
 676         rcu_read_lock();
 677
 678         resp_data = rcu_dereference(mvmvif->deflink.probe_resp_data);
 679         if (!resp_data)
 680                 goto out;
 681
 682         if (!resp_data->notif.noa_active)
 683                 goto out;
 684
 685         ie = cfg80211_find_ie_match(WLAN_EID_VENDOR_SPECIFIC,
 686                                     mgmt->u.probe_resp.variable,
 687                                     skb->len - base_len,
 688                                     match, 4, 2);
 689         if (!ie) {
 690                 IWL_DEBUG_TX(mvm, "probe resp doesn't have P2P IE\n");
 691                 goto out;
 692         }
 693
 694         if (skb_tailroom(skb) < resp_data->noa_len) {
 695                 if (pskb_expand_head(skb, 0, resp_data->noa_len, GFP_ATOMIC)) {
 696                         IWL_ERR(mvm,
 697                                 "Failed to reallocate probe resp\n");
 698                         goto out;
 699                 }
 700         }
 701
 702         pos = skb_put(skb, resp_data->noa_len);
 703
 704         *pos++ = WLAN_EID_VENDOR_SPECIFIC;
 705         /* Set length of IE body (not including ID and length itself) */
 706         *pos++ = resp_data->noa_len - 2;
 707         *pos++ = (WLAN_OUI_WFA >> 16) & 0xff;
 708         *pos++ = (WLAN_OUI_WFA >> 8) & 0xff;
 709         *pos++ = WLAN_OUI_WFA & 0xff;
 710         *pos++ = WLAN_OUI_TYPE_WFA_P2P;
 711
 712         memcpy(pos, &resp_data->notif.noa_attr,
 713                resp_data->noa_len - sizeof(struct ieee80211_vendor_ie));
 714
 715 out:
 716         rcu_read_unlock();
 717 }
 718
 719 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb)
 720 {
 721         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 722         struct ieee80211_tx_info info;
 723         struct iwl_device_tx_cmd *dev_cmd;
 724         u8 sta_id;
 725         int hdrlen = ieee80211_hdrlen(hdr->frame_control);
 726         __le16 fc = hdr->frame_control;
 727         bool offchannel = IEEE80211_SKB_CB(skb)->flags &
 728                 IEEE80211_TX_CTL_TX_OFFCHAN;
 729         int queue = -1;
 730
 731         if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc))
 732                 return -1;
 733
 734         memcpy(&info, skb->cb, sizeof(info));
 735
 736         if (WARN_ON_ONCE(skb->len > IEEE80211_MAX_DATA_LEN + hdrlen))
 737                 return -1;
 738
 739         if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU))
 740                 return -1;
 741
 742         if (info.control.vif) {
 743                 struct iwl_mvm_vif *mvmvif =
 744                         iwl_mvm_vif_from_mac80211(info.control.vif);
 745
 746                 if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE ||
 747                     info.control.vif->type == NL80211_IFTYPE_AP ||
 748                     info.control.vif->type == NL80211_IFTYPE_ADHOC) {
 749                         u32 link_id = u32_get_bits(info.control.flags,
 750                                                    IEEE80211_TX_CTRL_MLO_LINK);
 751                         struct iwl_mvm_vif_link_info *link;
 752
 753                         if (link_id == IEEE80211_LINK_UNSPECIFIED) {
 754                                 if (info.control.vif->active_links)
 755                                         link_id = ffs(info.control.vif->active_links) - 1;
 756                                 else
 757                                         link_id = 0;
 758                         }
 759
 760                         link = mvmvif->link[link_id];
 761                         if (WARN_ON(!link))
 762                                 return -1;
 763
 764                         if (!ieee80211_is_data(hdr->frame_control))
 765                                 sta_id = link->bcast_sta.sta_id;
 766                         else
 767                                 sta_id = link->mcast_sta.sta_id;
 768
 769                         queue = iwl_mvm_get_ctrl_vif_queue(mvm, link, &info,
 770                                                            skb);
 771                 } else if (info.control.vif->type == NL80211_IFTYPE_MONITOR) {
 772                         queue = mvm->snif_queue;
 773                         sta_id = mvm->snif_sta.sta_id;
 774                 } else if (info.control.vif->type == NL80211_IFTYPE_STATION &&
 775                            offchannel) {
 776                         /*
 777                          * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets
 778                          * that can be used in 2 different types of vifs, P2P &
 779                          * STATION.
 780                          * P2P uses the offchannel queue.
 781                          * STATION (HS2.0) uses the auxiliary context of the FW,
 782                          * and hence needs to be sent on the aux queue.
 783                          */
 784                         sta_id = mvm->aux_sta.sta_id;
 785                         queue = mvm->aux_queue;
 786                 }
 787         }
 788
 789         if (queue < 0) {
 790                 IWL_ERR(mvm, "No queue was found. Dropping TX\n");
 791                 return -1;
 792         }
 793
 794         if (unlikely(ieee80211_is_probe_resp(fc)))
 795                 iwl_mvm_probe_resp_set_noa(mvm, skb);
 796
 797         IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue);
 798
 799         dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id);
 800         if (!dev_cmd)
 801                 return -1;
 802
 803         /* From now on, we cannot access info->control */
 804         iwl_mvm_skb_prepare_status(skb, dev_cmd);
 805
 806         if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) {
 807                 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
 808                 return -1;
 809         }
 810
 811         return 0;
 812 }
 813
 814 unsigned int iwl_mvm_max_amsdu_size(struct iwl_mvm *mvm,
 815                                     struct ieee80211_sta *sta, unsigned int tid)
 816 {
 817         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 818         u8 ac = tid_to_mac80211_ac[tid];
 819         enum nl80211_band band;
 820         unsigned int txf;
 821         unsigned int val;
 822         int lmac;
 823
 824         /* For HE redirect to trigger based fifos */
 825         if (sta->deflink.he_cap.has_he && !WARN_ON(!iwl_mvm_has_new_tx_api(mvm)))
 826                 ac += 4;
 827
 828         txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac);
 829
 830         /*
 831          * Don't send an AMSDU that will be longer than the TXF.
 832          * Add a security margin of 256 for the TX command + headers.
 833          * We also want to have the start of the next packet inside the
 834          * fifo to be able to send bursts.
 835          */
 836         val = mvmsta->max_amsdu_len;
 837
 838         if (hweight16(sta->valid_links) <= 1) {
 839                 if (sta->valid_links) {
 840                         struct ieee80211_bss_conf *link_conf;
 841                         unsigned int link = ffs(sta->valid_links) - 1;
 842
 843                         rcu_read_lock();
 844                         link_conf = rcu_dereference(mvmsta->vif->link_conf[link]);
 845                         if (WARN_ON(!link_conf))
 846                                 band = NL80211_BAND_2GHZ;
 847                         else
 848                                 band = link_conf->chandef.chan->band;
 849                         rcu_read_unlock();
 850                 } else {
 851                         band = mvmsta->vif->bss_conf.chandef.chan->band;
 852                 }
 853
 854                 lmac = iwl_mvm_get_lmac_id(mvm, band);
 855         } else if (fw_has_capa(&mvm->fw->ucode_capa,
 856                                IWL_UCODE_TLV_CAPA_CDB_SUPPORT)) {
 857                 /* for real MLO restrict to both LMACs if they exist */
 858                 lmac = IWL_LMAC_5G_INDEX;
 859                 val = min_t(unsigned int, val,
 860                             mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256);
 861                 lmac = IWL_LMAC_24G_INDEX;
 862         } else {
 863                 lmac = IWL_LMAC_24G_INDEX;
 864         }
 865
 866         return min_t(unsigned int, val,
 867                      mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256);
 868 }
 869
 870 #ifdef CONFIG_INET
 871
 872 static int
 873 iwl_mvm_tx_tso_segment(struct sk_buff *skb, unsigned int num_subframes,
 874                        netdev_features_t netdev_flags,
 875                        struct sk_buff_head *mpdus_skb)
 876 {
 877         struct sk_buff *tmp, *next;
 878         struct ieee80211_hdr *hdr = (void *)skb->data;
 879         char cb[sizeof(skb->cb)];
 880         u16 i = 0;
 881         unsigned int tcp_payload_len;
 882         unsigned int mss = skb_shinfo(skb)->gso_size;
 883         bool ipv4 = (skb->protocol == htons(ETH_P_IP));
 884         bool qos = ieee80211_is_data_qos(hdr->frame_control);
 885         u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0;
 886
 887         skb_shinfo(skb)->gso_size = num_subframes * mss;
 888         memcpy(cb, skb->cb, sizeof(cb));
 889
 890         next = skb_gso_segment(skb, netdev_flags);
 891         skb_shinfo(skb)->gso_size = mss;
 892         skb_shinfo(skb)->gso_type = ipv4 ? SKB_GSO_TCPV4 : SKB_GSO_TCPV6;
 893         if (WARN_ON_ONCE(IS_ERR(next)))
 894                 return -EINVAL;
 895         else if (next)
 896                 consume_skb(skb);
 897
 898         skb_list_walk_safe(next, tmp, next) {
 899                 memcpy(tmp->cb, cb, sizeof(tmp->cb));
 900                 /*
 901                  * Compute the length of all the data added for the A-MSDU.
 902                  * This will be used to compute the length to write in the TX
 903                  * command. We have: SNAP + IP + TCP for n -1 subframes and
 904                  * ETH header for n subframes.
 905                  */
 906                 tcp_payload_len = skb_tail_pointer(tmp) -
 907                         skb_transport_header(tmp) -
 908                         tcp_hdrlen(tmp) + tmp->data_len;
 909
 910                 if (ipv4)
 911                         ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes);
 912
 913                 if (tcp_payload_len > mss) {
 914                         skb_shinfo(tmp)->gso_size = mss;
 915                         skb_shinfo(tmp)->gso_type = ipv4 ? SKB_GSO_TCPV4 :
 916                                                            SKB_GSO_TCPV6;
 917                 } else {
 918                         if (qos) {
 919                                 u8 *qc;
 920
 921                                 if (ipv4)
 922                                         ip_send_check(ip_hdr(tmp));
 923
 924                                 qc = ieee80211_get_qos_ctl((void *)tmp->data);
 925                                 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
 926                         }
 927                         skb_shinfo(tmp)->gso_size = 0;
 928                 }
 929
 930                 skb_mark_not_on_list(tmp);
 931                 __skb_queue_tail(mpdus_skb, tmp);
 932                 i++;
 933         }
 934
 935         return 0;
 936 }
 937
 938 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
 939                           struct ieee80211_tx_info *info,
 940                           struct ieee80211_sta *sta,
 941                           struct sk_buff_head *mpdus_skb)
 942 {
 943         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 944         struct ieee80211_hdr *hdr = (void *)skb->data;
 945         unsigned int mss = skb_shinfo(skb)->gso_size;
 946         unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len;
 947         u16 snap_ip_tcp, pad;
 948         netdev_features_t netdev_flags = NETIF_F_CSUM_MASK | NETIF_F_SG;
 949         u8 tid;
 950
 951         snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) +
 952                 tcp_hdrlen(skb);
 953
 954         if (!mvmsta->max_amsdu_len ||
 955             !ieee80211_is_data_qos(hdr->frame_control) ||
 956             !mvmsta->amsdu_enabled)
 957                 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
 958
 959         /*
 960          * Do not build AMSDU for IPv6 with extension headers.
 961          * ask stack to segment and checkum the generated MPDUs for us.
 962          */
 963         if (skb->protocol == htons(ETH_P_IPV6) &&
 964             ((struct ipv6hdr *)skb_network_header(skb))->nexthdr !=
 965             IPPROTO_TCP) {
 966                 netdev_flags &= ~NETIF_F_CSUM_MASK;
 967                 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
 968         }
 969
 970         tid = ieee80211_get_tid(hdr);
 971         if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
 972                 return -EINVAL;
 973
 974         /*
 975          * No need to lock amsdu_in_ampdu_allowed since it can't be modified
 976          * during an BA session.
 977          */
 978         if ((info->flags & IEEE80211_TX_CTL_AMPDU &&
 979              !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) ||
 980             !(mvmsta->amsdu_enabled & BIT(tid)))
 981                 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
 982
 983         /*
 984          * Take the min of ieee80211 station and mvm station
 985          */
 986         max_amsdu_len =
 987                 min_t(unsigned int, sta->cur->max_amsdu_len,
 988                       iwl_mvm_max_amsdu_size(mvm, sta, tid));
 989
 990         /*
 991          * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not
 992          * supported. This is a spec requirement (IEEE 802.11-2015
 993          * section 8.7.3 NOTE 3).
 994          */
 995         if (info->flags & IEEE80211_TX_CTL_AMPDU &&
 996             !sta->deflink.vht_cap.vht_supported)
 997                 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095);
 998
 999         /* Sub frame header + SNAP + IP header + TCP header + MSS */
1000         subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss;
1001         pad = (4 - subf_len) & 0x3;
1002
1003         /*
1004          * If we have N subframes in the A-MSDU, then the A-MSDU's size is
1005          * N * subf_len + (N - 1) * pad.
1006          */
1007         num_subframes = (max_amsdu_len + pad) / (subf_len + pad);
1008
1009         if (sta->max_amsdu_subframes &&
1010             num_subframes > sta->max_amsdu_subframes)
1011                 num_subframes = sta->max_amsdu_subframes;
1012
1013         tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
1014                 tcp_hdrlen(skb) + skb->data_len;
1015
1016         /*
1017          * Make sure we have enough TBs for the A-MSDU:
1018          *      2 for each subframe
1019          *      1 more for each fragment
1020          *      1 more for the potential data in the header
1021          */
1022         if ((num_subframes * 2 + skb_shinfo(skb)->nr_frags + 1) >
1023             mvm->trans->max_skb_frags)
1024                 num_subframes = 1;
1025
1026         if (num_subframes > 1)
1027                 *ieee80211_get_qos_ctl(hdr) |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
1028
1029         /* This skb fits in one single A-MSDU */
1030         if (num_subframes * mss >= tcp_payload_len) {
1031                 __skb_queue_tail(mpdus_skb, skb);
1032                 return 0;
1033         }
1034
1035         /*
1036          * Trick the segmentation function to make it
1037          * create SKBs that can fit into one A-MSDU.
1038          */
1039         return iwl_mvm_tx_tso_segment(skb, num_subframes, netdev_flags,
1040                                       mpdus_skb);
1041 }
1042 #else /* CONFIG_INET */
1043 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
1044                           struct ieee80211_tx_info *info,
1045                           struct ieee80211_sta *sta,
1046                           struct sk_buff_head *mpdus_skb)
1047 {
1048         /* Impossible to get TSO with CONFIG_INET */
1049         WARN_ON(1);
1050
1051         return -1;
1052 }
1053 #endif
1054
1055 /* Check if there are any timed-out TIDs on a given shared TXQ */
1056 static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id)
1057 {
1058         unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap;
1059         unsigned long now = jiffies;
1060         int tid;
1061
1062         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1063                 return false;
1064
1065         for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) {
1066                 if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] +
1067                                 IWL_MVM_DQA_QUEUE_TIMEOUT, now))
1068                         return true;
1069         }
1070
1071         return false;
1072 }
1073
1074 static void iwl_mvm_tx_airtime(struct iwl_mvm *mvm,
1075                                struct iwl_mvm_sta *mvmsta,
1076                                int airtime)
1077 {
1078         int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
1079         struct iwl_mvm_tcm_mac *mdata;
1080
1081         if (mac >= NUM_MAC_INDEX_DRIVER)
1082                 return;
1083
1084         mdata = &mvm->tcm.data[mac];
1085
1086         if (mvm->tcm.paused)
1087                 return;
1088
1089         if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD))
1090                 schedule_delayed_work(&mvm->tcm.work, 0);
1091
1092         mdata->tx.airtime += airtime;
1093 }
1094
1095 static int iwl_mvm_tx_pkt_queued(struct iwl_mvm *mvm,
1096                                  struct iwl_mvm_sta *mvmsta, int tid)
1097 {
1098         u32 ac = tid_to_mac80211_ac[tid];
1099         int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
1100         struct iwl_mvm_tcm_mac *mdata;
1101
1102         if (mac >= NUM_MAC_INDEX_DRIVER)
1103                 return -EINVAL;
1104
1105         mdata = &mvm->tcm.data[mac];
1106
1107         mdata->tx.pkts[ac]++;
1108
1109         return 0;
1110 }
1111
1112 /*
1113  * Sets the fields in the Tx cmd that are crypto related.
1114  *
1115  * This function must be called with BHs disabled.
1116  */
1117 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb,
1118                            struct ieee80211_tx_info *info,
1119                            struct ieee80211_sta *sta)
1120 {
1121         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1122         struct iwl_mvm_sta *mvmsta;
1123         struct iwl_device_tx_cmd *dev_cmd;
1124         __le16 fc;
1125         u16 seq_number = 0;
1126         u8 tid = IWL_MAX_TID_COUNT;
1127         u16 txq_id;
1128         bool is_ampdu = false;
1129         int hdrlen;
1130
1131         mvmsta = iwl_mvm_sta_from_mac80211(sta);
1132         fc = hdr->frame_control;
1133         hdrlen = ieee80211_hdrlen(fc);
1134
1135         if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc))
1136                 return -1;
1137
1138         if (WARN_ON_ONCE(!mvmsta))
1139                 return -1;
1140
1141         if (WARN_ON_ONCE(mvmsta->deflink.sta_id == IWL_MVM_INVALID_STA))
1142                 return -1;
1143
1144         if (unlikely(ieee80211_is_any_nullfunc(fc)) && sta->deflink.he_cap.has_he)
1145                 return -1;
1146
1147         if (unlikely(ieee80211_is_probe_resp(fc)))
1148                 iwl_mvm_probe_resp_set_noa(mvm, skb);
1149
1150         dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen,
1151                                         sta, mvmsta->deflink.sta_id);
1152         if (!dev_cmd)
1153                 goto drop;
1154
1155         /*
1156          * we handle that entirely ourselves -- for uAPSD the firmware
1157          * will always send a notification, and for PS-Poll responses
1158          * we'll notify mac80211 when getting frame status
1159          */
1160         info->flags &= ~IEEE80211_TX_STATUS_EOSP;
1161
1162         spin_lock(&mvmsta->lock);
1163
1164         /* nullfunc frames should go to the MGMT queue regardless of QOS,
1165          * the conditions of !ieee80211_is_qos_nullfunc(fc) and
1166          * !ieee80211_is_data_qos(fc) keep the default assignment of MGMT TID
1167          */
1168         if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
1169                 tid = ieee80211_get_tid(hdr);
1170                 if (WARN_ONCE(tid >= IWL_MAX_TID_COUNT, "Invalid TID %d", tid))
1171                         goto drop_unlock_sta;
1172
1173                 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU;
1174                 if (WARN_ONCE(is_ampdu &&
1175                               mvmsta->tid_data[tid].state != IWL_AGG_ON,
1176                               "Invalid internal agg state %d for TID %d",
1177                                mvmsta->tid_data[tid].state, tid))
1178                         goto drop_unlock_sta;
1179
1180                 seq_number = mvmsta->tid_data[tid].seq_number;
1181                 seq_number &= IEEE80211_SCTL_SEQ;
1182
1183                 if (!iwl_mvm_has_new_tx_api(mvm)) {
1184                         struct iwl_tx_cmd *tx_cmd = (void *)dev_cmd->payload;
1185
1186                         hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
1187                         hdr->seq_ctrl |= cpu_to_le16(seq_number);
1188                         /* update the tx_cmd hdr as it was already copied */
1189                         tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl;
1190                 }
1191         } else if (ieee80211_is_data(fc) && !ieee80211_is_data_qos(fc) &&
1192                    !ieee80211_is_nullfunc(fc)) {
1193                 tid = IWL_TID_NON_QOS;
1194         }
1195
1196         txq_id = mvmsta->tid_data[tid].txq_id;
1197
1198         WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
1199
1200         if (WARN_ONCE(txq_id == IWL_MVM_INVALID_QUEUE, "Invalid TXQ id")) {
1201                 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1202                 spin_unlock(&mvmsta->lock);
1203                 return -1;
1204         }
1205
1206         if (!iwl_mvm_has_new_tx_api(mvm)) {
1207                 /* Keep track of the time of the last frame for this RA/TID */
1208                 mvm->queue_info[txq_id].last_frame_time[tid] = jiffies;
1209
1210                 /*
1211                  * If we have timed-out TIDs - schedule the worker that will
1212                  * reconfig the queues and update them
1213                  *
1214                  * Note that the no lock is taken here in order to not serialize
1215                  * the TX flow. This isn't dangerous because scheduling
1216                  * mvm->add_stream_wk can't ruin the state, and if we DON'T
1217                  * schedule it due to some race condition then next TX we get
1218                  * here we will.
1219                  */
1220                 if (unlikely(mvm->queue_info[txq_id].status ==
1221                              IWL_MVM_QUEUE_SHARED &&
1222                              iwl_mvm_txq_should_update(mvm, txq_id)))
1223                         schedule_work(&mvm->add_stream_wk);
1224         }
1225
1226         IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x len %d\n",
1227                      mvmsta->deflink.sta_id, tid, txq_id,
1228                      IEEE80211_SEQ_TO_SN(seq_number), skb->len);
1229
1230         /* From now on, we cannot access info->control */
1231         iwl_mvm_skb_prepare_status(skb, dev_cmd);
1232
1233         /*
1234          * The IV is introduced by the HW for new tx api, and it is not present
1235          * in the skb, hence, don't tell iwl_mvm_mei_tx_copy_to_csme about the
1236          * IV for those devices.
1237          */
1238         if (ieee80211_is_data(fc))
1239                 iwl_mvm_mei_tx_copy_to_csme(mvm, skb,
1240                                             info->control.hw_key &&
1241                                             !iwl_mvm_has_new_tx_api(mvm) ?
1242                                             info->control.hw_key->iv_len : 0);
1243
1244         if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id))
1245                 goto drop_unlock_sta;
1246
1247         if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc))
1248                 mvmsta->tid_data[tid].seq_number = seq_number + 0x10;
1249
1250         spin_unlock(&mvmsta->lock);
1251
1252         if (iwl_mvm_tx_pkt_queued(mvm, mvmsta,
1253                                   tid == IWL_MAX_TID_COUNT ? 0 : tid))
1254                 goto drop;
1255
1256         return 0;
1257
1258 drop_unlock_sta:
1259         iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1260         spin_unlock(&mvmsta->lock);
1261 drop:
1262         IWL_DEBUG_TX(mvm, "TX to [%d|%d] dropped\n", mvmsta->deflink.sta_id,
1263                      tid);
1264         return -1;
1265 }
1266
1267 int iwl_mvm_tx_skb_sta(struct iwl_mvm *mvm, struct sk_buff *skb,
1268                        struct ieee80211_sta *sta)
1269 {
1270         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1271         struct ieee80211_tx_info info;
1272         struct sk_buff_head mpdus_skbs;
1273         unsigned int payload_len;
1274         int ret;
1275         struct sk_buff *orig_skb = skb;
1276
1277         if (WARN_ON_ONCE(!mvmsta))
1278                 return -1;
1279
1280         if (WARN_ON_ONCE(mvmsta->deflink.sta_id == IWL_MVM_INVALID_STA))
1281                 return -1;
1282
1283         memcpy(&info, skb->cb, sizeof(info));
1284
1285         if (!skb_is_gso(skb))
1286                 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1287
1288         payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
1289                 tcp_hdrlen(skb) + skb->data_len;
1290
1291         if (payload_len <= skb_shinfo(skb)->gso_size)
1292                 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1293
1294         __skb_queue_head_init(&mpdus_skbs);
1295
1296         ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs);
1297         if (ret)
1298                 return ret;
1299
1300         WARN_ON(skb_queue_empty(&mpdus_skbs));
1301
1302         while (!skb_queue_empty(&mpdus_skbs)) {
1303                 skb = __skb_dequeue(&mpdus_skbs);
1304
1305                 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1306                 if (ret) {
1307                         /* Free skbs created as part of TSO logic that have not yet been dequeued */
1308                         __skb_queue_purge(&mpdus_skbs);
1309                         /* skb here is not necessarily same as skb that entered this method,
1310                          * so free it explicitly.
1311                          */
1312                         if (skb == orig_skb)
1313                                 ieee80211_free_txskb(mvm->hw, skb);
1314                         else
1315                                 kfree_skb(skb);
1316                         /* there was error, but we consumed skb one way or another, so return 0 */
1317                         return 0;
1318                 }
1319         }
1320
1321         return 0;
1322 }
1323
1324 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm,
1325                                       struct ieee80211_sta *sta, u8 tid)
1326 {
1327         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1328         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1329         struct ieee80211_vif *vif = mvmsta->vif;
1330         u16 normalized_ssn;
1331
1332         lockdep_assert_held(&mvmsta->lock);
1333
1334         if ((tid_data->state == IWL_AGG_ON ||
1335              tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) &&
1336             iwl_mvm_tid_queued(mvm, tid_data) == 0) {
1337                 /*
1338                  * Now that this aggregation or DQA queue is empty tell
1339                  * mac80211 so it knows we no longer have frames buffered for
1340                  * the station on this TID (for the TIM bitmap calculation.)
1341                  */
1342                 ieee80211_sta_set_buffered(sta, tid, false);
1343         }
1344
1345         /*
1346          * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
1347          * to align the wrap around of ssn so we compare relevant values.
1348          */
1349         normalized_ssn = tid_data->ssn;
1350         if (mvm->trans->trans_cfg->gen2)
1351                 normalized_ssn &= 0xff;
1352
1353         if (normalized_ssn != tid_data->next_reclaimed)
1354                 return;
1355
1356         switch (tid_data->state) {
1357         case IWL_EMPTYING_HW_QUEUE_ADDBA:
1358                 IWL_DEBUG_TX_QUEUES(mvm,
1359                                     "Can continue addBA flow ssn = next_recl = %d\n",
1360                                     tid_data->next_reclaimed);
1361                 tid_data->state = IWL_AGG_STARTING;
1362                 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1363                 break;
1364
1365         case IWL_EMPTYING_HW_QUEUE_DELBA:
1366                 IWL_DEBUG_TX_QUEUES(mvm,
1367                                     "Can continue DELBA flow ssn = next_recl = %d\n",
1368                                     tid_data->next_reclaimed);
1369                 tid_data->state = IWL_AGG_OFF;
1370                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1371                 break;
1372
1373         default:
1374                 break;
1375         }
1376 }
1377
1378 #ifdef CONFIG_IWLWIFI_DEBUG
1379 const char *iwl_mvm_get_tx_fail_reason(u32 status)
1380 {
1381 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
1382 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
1383
1384         switch (status & TX_STATUS_MSK) {
1385         case TX_STATUS_SUCCESS:
1386                 return "SUCCESS";
1387         TX_STATUS_POSTPONE(DELAY);
1388         TX_STATUS_POSTPONE(FEW_BYTES);
1389         TX_STATUS_POSTPONE(BT_PRIO);
1390         TX_STATUS_POSTPONE(QUIET_PERIOD);
1391         TX_STATUS_POSTPONE(CALC_TTAK);
1392         TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
1393         TX_STATUS_FAIL(SHORT_LIMIT);
1394         TX_STATUS_FAIL(LONG_LIMIT);
1395         TX_STATUS_FAIL(UNDERRUN);
1396         TX_STATUS_FAIL(DRAIN_FLOW);
1397         TX_STATUS_FAIL(RFKILL_FLUSH);
1398         TX_STATUS_FAIL(LIFE_EXPIRE);
1399         TX_STATUS_FAIL(DEST_PS);
1400         TX_STATUS_FAIL(HOST_ABORTED);
1401         TX_STATUS_FAIL(BT_RETRY);
1402         TX_STATUS_FAIL(STA_INVALID);
1403         TX_STATUS_FAIL(FRAG_DROPPED);
1404         TX_STATUS_FAIL(TID_DISABLE);
1405         TX_STATUS_FAIL(FIFO_FLUSHED);
1406         TX_STATUS_FAIL(SMALL_CF_POLL);
1407         TX_STATUS_FAIL(FW_DROP);
1408         TX_STATUS_FAIL(STA_COLOR_MISMATCH);
1409         }
1410
1411         return "UNKNOWN";
1412
1413 #undef TX_STATUS_FAIL
1414 #undef TX_STATUS_POSTPONE
1415 }
1416 #endif /* CONFIG_IWLWIFI_DEBUG */
1417
1418 static int iwl_mvm_get_hwrate_chan_width(u32 chan_width)
1419 {
1420         switch (chan_width) {
1421         case RATE_MCS_CHAN_WIDTH_20:
1422                 return 0;
1423         case RATE_MCS_CHAN_WIDTH_40:
1424                 return IEEE80211_TX_RC_40_MHZ_WIDTH;
1425         case RATE_MCS_CHAN_WIDTH_80:
1426                 return IEEE80211_TX_RC_80_MHZ_WIDTH;
1427         case RATE_MCS_CHAN_WIDTH_160:
1428                 return IEEE80211_TX_RC_160_MHZ_WIDTH;
1429         default:
1430                 return 0;
1431         }
1432 }
1433
1434 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags,
1435                                enum nl80211_band band,
1436                                struct ieee80211_tx_rate *r)
1437 {
1438         u32 format = rate_n_flags & RATE_MCS_MOD_TYPE_MSK;
1439         u32 rate = format == RATE_MCS_HT_MSK ?
1440                 RATE_HT_MCS_INDEX(rate_n_flags) :
1441                 rate_n_flags & RATE_MCS_CODE_MSK;
1442
1443         r->flags |=
1444                 iwl_mvm_get_hwrate_chan_width(rate_n_flags &
1445                                               RATE_MCS_CHAN_WIDTH_MSK);
1446
1447         if (rate_n_flags & RATE_MCS_SGI_MSK)
1448                 r->flags |= IEEE80211_TX_RC_SHORT_GI;
1449         if (format ==  RATE_MCS_HT_MSK) {
1450                 r->flags |= IEEE80211_TX_RC_MCS;
1451                 r->idx = rate;
1452         } else if (format ==  RATE_MCS_VHT_MSK) {
1453                 ieee80211_rate_set_vht(r, rate,
1454                                        FIELD_GET(RATE_MCS_NSS_MSK,
1455                                                  rate_n_flags) + 1);
1456                 r->flags |= IEEE80211_TX_RC_VHT_MCS;
1457         } else if (format == RATE_MCS_HE_MSK) {
1458                 /* mac80211 cannot do this without ieee80211_tx_status_ext()
1459                  * but it only matters for radiotap */
1460                 r->idx = 0;
1461         } else {
1462                 r->idx = iwl_mvm_legacy_hw_idx_to_mac80211_idx(rate_n_flags,
1463                                                                band);
1464         }
1465 }
1466
1467 void iwl_mvm_hwrate_to_tx_rate_v1(u32 rate_n_flags,
1468                                   enum nl80211_band band,
1469                                   struct ieee80211_tx_rate *r)
1470 {
1471         if (rate_n_flags & RATE_HT_MCS_GF_MSK)
1472                 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
1473
1474         r->flags |=
1475                 iwl_mvm_get_hwrate_chan_width(rate_n_flags &
1476                                               RATE_MCS_CHAN_WIDTH_MSK_V1);
1477
1478         if (rate_n_flags & RATE_MCS_SGI_MSK_V1)
1479                 r->flags |= IEEE80211_TX_RC_SHORT_GI;
1480         if (rate_n_flags & RATE_MCS_HT_MSK_V1) {
1481                 r->flags |= IEEE80211_TX_RC_MCS;
1482                 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK_V1;
1483         } else if (rate_n_flags & RATE_MCS_VHT_MSK_V1) {
1484                 ieee80211_rate_set_vht(
1485                         r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK,
1486                         FIELD_GET(RATE_MCS_NSS_MSK, rate_n_flags) + 1);
1487                 r->flags |= IEEE80211_TX_RC_VHT_MCS;
1488         } else {
1489                 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
1490                                                              band);
1491         }
1492 }
1493
1494 /*
1495  * translate ucode response to mac80211 tx status control values
1496  */
1497 static void iwl_mvm_hwrate_to_tx_status(const struct iwl_fw *fw,
1498                                         u32 rate_n_flags,
1499                                         struct ieee80211_tx_info *info)
1500 {
1501         struct ieee80211_tx_rate *r = &info->status.rates[0];
1502
1503         if (iwl_fw_lookup_notif_ver(fw, LONG_GROUP,
1504                                     TX_CMD, 0) <= 6)
1505                 rate_n_flags = iwl_new_rate_from_v1(rate_n_flags);
1506
1507         info->status.antenna =
1508                 ((rate_n_flags & RATE_MCS_ANT_AB_MSK) >> RATE_MCS_ANT_POS);
1509         iwl_mvm_hwrate_to_tx_rate(rate_n_flags,
1510                                   info->band, r);
1511 }
1512
1513 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm,
1514                                             u32 status, __le16 frame_control)
1515 {
1516         struct iwl_fw_dbg_trigger_tlv *trig;
1517         struct iwl_fw_dbg_trigger_tx_status *status_trig;
1518         int i;
1519
1520         if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS) {
1521                 enum iwl_fw_ini_time_point tp =
1522                         IWL_FW_INI_TIME_POINT_TX_FAILED;
1523
1524                 if (ieee80211_is_action(frame_control))
1525                         tp = IWL_FW_INI_TIME_POINT_TX_WFD_ACTION_FRAME_FAILED;
1526
1527                 iwl_dbg_tlv_time_point(&mvm->fwrt,
1528                                        tp, NULL);
1529                 return;
1530         }
1531
1532         trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL,
1533                                      FW_DBG_TRIGGER_TX_STATUS);
1534         if (!trig)
1535                 return;
1536
1537         status_trig = (void *)trig->data;
1538
1539         for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) {
1540                 /* don't collect on status 0 */
1541                 if (!status_trig->statuses[i].status)
1542                         break;
1543
1544                 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK))
1545                         continue;
1546
1547                 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
1548                                         "Tx status %d was received",
1549                                         status & TX_STATUS_MSK);
1550                 break;
1551         }
1552 }
1553
1554 /*
1555  * iwl_mvm_get_scd_ssn - returns the SSN of the SCD
1556  * @tx_resp: the Tx response from the fw (agg or non-agg)
1557  *
1558  * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since
1559  * it can't know that everything will go well until the end of the AMPDU, it
1560  * can't know in advance the number of MPDUs that will be sent in the current
1561  * batch. This is why it writes the agg Tx response while it fetches the MPDUs.
1562  * Hence, it can't know in advance what the SSN of the SCD will be at the end
1563  * of the batch. This is why the SSN of the SCD is written at the end of the
1564  * whole struct at a variable offset. This function knows how to cope with the
1565  * variable offset and returns the SSN of the SCD.
1566  */
1567 static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm,
1568                                       struct iwl_mvm_tx_resp *tx_resp)
1569 {
1570         return le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) +
1571                             tx_resp->frame_count) & 0xfff;
1572 }
1573
1574 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm,
1575                                      struct iwl_rx_packet *pkt)
1576 {
1577         struct ieee80211_sta *sta;
1578         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1579         int txq_id = SEQ_TO_QUEUE(sequence);
1580         /* struct iwl_mvm_tx_resp_v3 is almost the same */
1581         struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1582         int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1583         int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1584         struct agg_tx_status *agg_status =
1585                 iwl_mvm_get_agg_status(mvm, tx_resp);
1586         u32 status = le16_to_cpu(agg_status->status);
1587         u16 ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp);
1588         struct sk_buff_head skbs;
1589         u8 skb_freed = 0;
1590         u8 lq_color;
1591         u16 next_reclaimed, seq_ctl;
1592         bool is_ndp = false;
1593
1594         __skb_queue_head_init(&skbs);
1595
1596         if (iwl_mvm_has_new_tx_api(mvm))
1597                 txq_id = le16_to_cpu(tx_resp->tx_queue);
1598
1599         seq_ctl = le16_to_cpu(tx_resp->seq_ctl);
1600
1601         /* we can free until ssn % q.n_bd not inclusive */
1602         iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs);
1603
1604         while (!skb_queue_empty(&skbs)) {
1605                 struct sk_buff *skb = __skb_dequeue(&skbs);
1606                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1607                 struct ieee80211_hdr *hdr = (void *)skb->data;
1608                 bool flushed = false;
1609
1610                 skb_freed++;
1611
1612                 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1613
1614                 memset(&info->status, 0, sizeof(info->status));
1615
1616                 /* inform mac80211 about what happened with the frame */
1617                 switch (status & TX_STATUS_MSK) {
1618                 case TX_STATUS_SUCCESS:
1619                 case TX_STATUS_DIRECT_DONE:
1620                         info->flags |= IEEE80211_TX_STAT_ACK;
1621                         break;
1622                 case TX_STATUS_FAIL_FIFO_FLUSHED:
1623                 case TX_STATUS_FAIL_DRAIN_FLOW:
1624                         flushed = true;
1625                         break;
1626                 case TX_STATUS_FAIL_DEST_PS:
1627                         /* the FW should have stopped the queue and not
1628                          * return this status
1629                          */
1630                         IWL_ERR_LIMIT(mvm,
1631                                       "FW reported TX filtered, status=0x%x, FC=0x%x\n",
1632                                       status, le16_to_cpu(hdr->frame_control));
1633                         info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
1634                         break;
1635                 default:
1636                         break;
1637                 }
1638
1639                 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS &&
1640                     ieee80211_is_mgmt(hdr->frame_control))
1641                         iwl_mvm_toggle_tx_ant(mvm, &mvm->mgmt_last_antenna_idx);
1642
1643                 /*
1644                  * If we are freeing multiple frames, mark all the frames
1645                  * but the first one as acked, since they were acknowledged
1646                  * before
1647                  * */
1648                 if (skb_freed > 1)
1649                         info->flags |= IEEE80211_TX_STAT_ACK;
1650
1651                 iwl_mvm_tx_status_check_trigger(mvm, status, hdr->frame_control);
1652
1653                 info->status.rates[0].count = tx_resp->failure_frame + 1;
1654
1655                 iwl_mvm_hwrate_to_tx_status(mvm->fw,
1656                                             le32_to_cpu(tx_resp->initial_rate),
1657                                             info);
1658
1659                 /* Don't assign the converted initial_rate, because driver
1660                  * TLC uses this and doesn't support the new FW rate
1661                  */
1662                 info->status.status_driver_data[1] =
1663                         (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate);
1664
1665                 /* Single frame failure in an AMPDU queue => send BAR */
1666                 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
1667                     !(info->flags & IEEE80211_TX_STAT_ACK) &&
1668                     !(info->flags & IEEE80211_TX_STAT_TX_FILTERED) && !flushed)
1669                         info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1670                 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1671
1672                 /* W/A FW bug: seq_ctl is wrong upon failure / BAR frame */
1673                 if (ieee80211_is_back_req(hdr->frame_control))
1674                         seq_ctl = 0;
1675                 else if (status != TX_STATUS_SUCCESS)
1676                         seq_ctl = le16_to_cpu(hdr->seq_ctrl);
1677
1678                 if (unlikely(!seq_ctl)) {
1679                         /*
1680                          * If it is an NDP, we can't update next_reclaim since
1681                          * its sequence control is 0. Note that for that same
1682                          * reason, NDPs are never sent to A-MPDU'able queues
1683                          * so that we can never have more than one freed frame
1684                          * for a single Tx resonse (see WARN_ON below).
1685                          */
1686                         if (ieee80211_is_qos_nullfunc(hdr->frame_control))
1687                                 is_ndp = true;
1688                 }
1689
1690                 /*
1691                  * TODO: this is not accurate if we are freeing more than one
1692                  * packet.
1693                  */
1694                 info->status.tx_time =
1695                         le16_to_cpu(tx_resp->wireless_media_time);
1696                 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1);
1697                 lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info);
1698                 info->status.status_driver_data[0] =
1699                         RS_DRV_DATA_PACK(lq_color, tx_resp->reduced_tpc);
1700
1701                 if (likely(!iwl_mvm_time_sync_frame(mvm, skb, hdr->addr1)))
1702                         ieee80211_tx_status(mvm->hw, skb);
1703         }
1704
1705         /* This is an aggregation queue or might become one, so we use
1706          * the ssn since: ssn = wifi seq_num % 256.
1707          * The seq_ctl is the sequence control of the packet to which
1708          * this Tx response relates. But if there is a hole in the
1709          * bitmap of the BA we received, this Tx response may allow to
1710          * reclaim the hole and all the subsequent packets that were
1711          * already acked. In that case, seq_ctl != ssn, and the next
1712          * packet to be reclaimed will be ssn and not seq_ctl. In that
1713          * case, several packets will be reclaimed even if
1714          * frame_count = 1.
1715          *
1716          * The ssn is the index (% 256) of the latest packet that has
1717          * treated (acked / dropped) + 1.
1718          */
1719         next_reclaimed = ssn;
1720
1721         IWL_DEBUG_TX_REPLY(mvm,
1722                            "TXQ %d status %s (0x%08x)\n",
1723                            txq_id, iwl_mvm_get_tx_fail_reason(status), status);
1724
1725         IWL_DEBUG_TX_REPLY(mvm,
1726                            "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
1727                            le32_to_cpu(tx_resp->initial_rate),
1728                            tx_resp->failure_frame, SEQ_TO_INDEX(sequence),
1729                            ssn, next_reclaimed, seq_ctl);
1730
1731         rcu_read_lock();
1732
1733         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1734         /*
1735          * sta can't be NULL otherwise it'd mean that the sta has been freed in
1736          * the firmware while we still have packets for it in the Tx queues.
1737          */
1738         if (WARN_ON_ONCE(!sta))
1739                 goto out;
1740
1741         if (!IS_ERR(sta)) {
1742                 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1743
1744                 iwl_mvm_tx_airtime(mvm, mvmsta,
1745                                    le16_to_cpu(tx_resp->wireless_media_time));
1746
1747                 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS &&
1748                     mvmsta->sta_state < IEEE80211_STA_AUTHORIZED)
1749                         iwl_mvm_toggle_tx_ant(mvm, &mvmsta->tx_ant);
1750
1751                 if (sta->wme && tid != IWL_MGMT_TID) {
1752                         struct iwl_mvm_tid_data *tid_data =
1753                                 &mvmsta->tid_data[tid];
1754                         bool send_eosp_ndp = false;
1755
1756                         spin_lock_bh(&mvmsta->lock);
1757
1758                         if (!is_ndp) {
1759                                 tid_data->next_reclaimed = next_reclaimed;
1760                                 IWL_DEBUG_TX_REPLY(mvm,
1761                                                    "Next reclaimed packet:%d\n",
1762                                                    next_reclaimed);
1763                         } else {
1764                                 IWL_DEBUG_TX_REPLY(mvm,
1765                                                    "NDP - don't update next_reclaimed\n");
1766                         }
1767
1768                         iwl_mvm_check_ratid_empty(mvm, sta, tid);
1769
1770                         if (mvmsta->sleep_tx_count) {
1771                                 mvmsta->sleep_tx_count--;
1772                                 if (mvmsta->sleep_tx_count &&
1773                                     !iwl_mvm_tid_queued(mvm, tid_data)) {
1774                                         /*
1775                                          * The number of frames in the queue
1776                                          * dropped to 0 even if we sent less
1777                                          * frames than we thought we had on the
1778                                          * Tx queue.
1779                                          * This means we had holes in the BA
1780                                          * window that we just filled, ask
1781                                          * mac80211 to send EOSP since the
1782                                          * firmware won't know how to do that.
1783                                          * Send NDP and the firmware will send
1784                                          * EOSP notification that will trigger
1785                                          * a call to ieee80211_sta_eosp().
1786                                          */
1787                                         send_eosp_ndp = true;
1788                                 }
1789                         }
1790
1791                         spin_unlock_bh(&mvmsta->lock);
1792                         if (send_eosp_ndp) {
1793                                 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta,
1794                                         IEEE80211_FRAME_RELEASE_UAPSD,
1795                                         1, tid, false, false);
1796                                 mvmsta->sleep_tx_count = 0;
1797                                 ieee80211_send_eosp_nullfunc(sta, tid);
1798                         }
1799                 }
1800
1801                 if (mvmsta->next_status_eosp) {
1802                         mvmsta->next_status_eosp = false;
1803                         ieee80211_sta_eosp(sta);
1804                 }
1805         }
1806 out:
1807         rcu_read_unlock();
1808 }
1809
1810 #ifdef CONFIG_IWLWIFI_DEBUG
1811 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
1812 static const char *iwl_get_agg_tx_status(u16 status)
1813 {
1814         switch (status & AGG_TX_STATE_STATUS_MSK) {
1815         AGG_TX_STATE_(TRANSMITTED);
1816         AGG_TX_STATE_(UNDERRUN);
1817         AGG_TX_STATE_(BT_PRIO);
1818         AGG_TX_STATE_(FEW_BYTES);
1819         AGG_TX_STATE_(ABORT);
1820         AGG_TX_STATE_(TX_ON_AIR_DROP);
1821         AGG_TX_STATE_(LAST_SENT_TRY_CNT);
1822         AGG_TX_STATE_(LAST_SENT_BT_KILL);
1823         AGG_TX_STATE_(SCD_QUERY);
1824         AGG_TX_STATE_(TEST_BAD_CRC32);
1825         AGG_TX_STATE_(RESPONSE);
1826         AGG_TX_STATE_(DUMP_TX);
1827         AGG_TX_STATE_(DELAY_TX);
1828         }
1829
1830         return "UNKNOWN";
1831 }
1832
1833 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1834                                       struct iwl_rx_packet *pkt)
1835 {
1836         struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1837         struct agg_tx_status *frame_status =
1838                 iwl_mvm_get_agg_status(mvm, tx_resp);
1839         int i;
1840         bool tirgger_timepoint = false;
1841
1842         for (i = 0; i < tx_resp->frame_count; i++) {
1843                 u16 fstatus = le16_to_cpu(frame_status[i].status);
1844                 /* In case one frame wasn't transmitted trigger time point */
1845                 tirgger_timepoint |= ((fstatus & AGG_TX_STATE_STATUS_MSK) !=
1846                                       AGG_TX_STATE_TRANSMITTED);
1847                 IWL_DEBUG_TX_REPLY(mvm,
1848                                    "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
1849                                    iwl_get_agg_tx_status(fstatus),
1850                                    fstatus & AGG_TX_STATE_STATUS_MSK,
1851                                    (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >>
1852                                         AGG_TX_STATE_TRY_CNT_POS,
1853                                    le16_to_cpu(frame_status[i].sequence));
1854         }
1855
1856         if (tirgger_timepoint)
1857                 iwl_dbg_tlv_time_point(&mvm->fwrt,
1858                                        IWL_FW_INI_TIME_POINT_TX_FAILED, NULL);
1859
1860 }
1861 #else
1862 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1863                                       struct iwl_rx_packet *pkt)
1864 {}
1865 #endif /* CONFIG_IWLWIFI_DEBUG */
1866
1867 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm,
1868                                   struct iwl_rx_packet *pkt)
1869 {
1870         struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1871         int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1872         int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1873         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1874         struct iwl_mvm_sta *mvmsta;
1875         int queue = SEQ_TO_QUEUE(sequence);
1876         struct ieee80211_sta *sta;
1877
1878         if (WARN_ON_ONCE(queue < IWL_MVM_DQA_MIN_DATA_QUEUE &&
1879                          (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)))
1880                 return;
1881
1882         iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt);
1883
1884         rcu_read_lock();
1885
1886         mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1887
1888         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1889         if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta) || !sta->wme)) {
1890                 rcu_read_unlock();
1891                 return;
1892         }
1893
1894         if (!WARN_ON_ONCE(!mvmsta)) {
1895                 mvmsta->tid_data[tid].rate_n_flags =
1896                         le32_to_cpu(tx_resp->initial_rate);
1897                 mvmsta->tid_data[tid].tx_time =
1898                         le16_to_cpu(tx_resp->wireless_media_time);
1899                 mvmsta->tid_data[tid].lq_color =
1900                         TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info);
1901                 iwl_mvm_tx_airtime(mvm, mvmsta,
1902                                    le16_to_cpu(tx_resp->wireless_media_time));
1903         }
1904
1905         rcu_read_unlock();
1906 }
1907
1908 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1909 {
1910         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1911         struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1912
1913         if (tx_resp->frame_count == 1)
1914                 iwl_mvm_rx_tx_cmd_single(mvm, pkt);
1915         else
1916                 iwl_mvm_rx_tx_cmd_agg(mvm, pkt);
1917 }
1918
1919 static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid,
1920                                int txq, int index,
1921                                struct ieee80211_tx_info *tx_info, u32 rate,
1922                                bool is_flush)
1923 {
1924         struct sk_buff_head reclaimed_skbs;
1925         struct iwl_mvm_tid_data *tid_data = NULL;
1926         struct ieee80211_sta *sta;
1927         struct iwl_mvm_sta *mvmsta = NULL;
1928         struct sk_buff *skb;
1929         int freed;
1930
1931         if (WARN_ONCE(sta_id >= mvm->fw->ucode_capa.num_stations ||
1932                       tid > IWL_MAX_TID_COUNT,
1933                       "sta_id %d tid %d", sta_id, tid))
1934                 return;
1935
1936         rcu_read_lock();
1937
1938         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1939
1940         /* Reclaiming frames for a station that has been deleted ? */
1941         if (WARN_ON_ONCE(!sta)) {
1942                 rcu_read_unlock();
1943                 return;
1944         }
1945
1946         __skb_queue_head_init(&reclaimed_skbs);
1947
1948         /*
1949          * Release all TFDs before the SSN, i.e. all TFDs in front of
1950          * block-ack window (we assume that they've been successfully
1951          * transmitted ... if not, it's too late anyway).
1952          */
1953         iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs);
1954
1955         skb_queue_walk(&reclaimed_skbs, skb) {
1956                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1957
1958                 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1959
1960                 memset(&info->status, 0, sizeof(info->status));
1961                 /* Packet was transmitted successfully, failures come as single
1962                  * frames because before failing a frame the firmware transmits
1963                  * it without aggregation at least once.
1964                  */
1965                 if (!is_flush)
1966                         info->flags |= IEEE80211_TX_STAT_ACK;
1967         }
1968
1969         /*
1970          * It's possible to get a BA response after invalidating the rcu (rcu is
1971          * invalidated in order to prevent new Tx from being sent, but there may
1972          * be some frames already in-flight).
1973          * In this case we just want to reclaim, and could skip all the
1974          * sta-dependent stuff since it's in the middle of being removed
1975          * anyways.
1976          */
1977         if (IS_ERR(sta))
1978                 goto out;
1979
1980         mvmsta = iwl_mvm_sta_from_mac80211(sta);
1981         tid_data = &mvmsta->tid_data[tid];
1982
1983         if (tid_data->txq_id != txq) {
1984                 IWL_ERR(mvm,
1985                         "invalid reclaim request: Q %d, tid %d\n",
1986                         tid_data->txq_id, tid);
1987                 rcu_read_unlock();
1988                 return;
1989         }
1990
1991         spin_lock_bh(&mvmsta->lock);
1992
1993         tid_data->next_reclaimed = index;
1994
1995         iwl_mvm_check_ratid_empty(mvm, sta, tid);
1996
1997         freed = 0;
1998
1999         /* pack lq color from tid_data along the reduced txp */
2000         tx_info->status.status_driver_data[0] =
2001                 RS_DRV_DATA_PACK(tid_data->lq_color,
2002                                  tx_info->status.status_driver_data[0]);
2003         tx_info->status.status_driver_data[1] = (void *)(uintptr_t)rate;
2004
2005         skb_queue_walk(&reclaimed_skbs, skb) {
2006                 struct ieee80211_hdr *hdr = (void *)skb->data;
2007                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2008
2009                 if (!is_flush) {
2010                         if (ieee80211_is_data_qos(hdr->frame_control))
2011                                 freed++;
2012                         else
2013                                 WARN_ON_ONCE(tid != IWL_MAX_TID_COUNT);
2014                 }
2015
2016                 /* this is the first skb we deliver in this batch */
2017                 /* put the rate scaling data there */
2018                 if (freed == 1) {
2019                         info->flags |= IEEE80211_TX_STAT_AMPDU;
2020                         memcpy(&info->status, &tx_info->status,
2021                                sizeof(tx_info->status));
2022                         iwl_mvm_hwrate_to_tx_status(mvm->fw, rate, info);
2023                 }
2024         }
2025
2026         spin_unlock_bh(&mvmsta->lock);
2027
2028         /* We got a BA notif with 0 acked or scd_ssn didn't progress which is
2029          * possible (i.e. first MPDU in the aggregation wasn't acked)
2030          * Still it's important to update RS about sent vs. acked.
2031          */
2032         if (!is_flush && skb_queue_empty(&reclaimed_skbs) &&
2033             !iwl_mvm_has_tlc_offload(mvm)) {
2034                 struct ieee80211_chanctx_conf *chanctx_conf = NULL;
2035
2036                 /* no TLC offload, so non-MLD mode */
2037                 if (mvmsta->vif)
2038                         chanctx_conf =
2039                                 rcu_dereference(mvmsta->vif->bss_conf.chanctx_conf);
2040
2041                 if (WARN_ON_ONCE(!chanctx_conf))
2042                         goto out;
2043
2044                 tx_info->band = chanctx_conf->def.chan->band;
2045                 iwl_mvm_hwrate_to_tx_status(mvm->fw, rate, tx_info);
2046
2047                 IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n");
2048                 iwl_mvm_rs_tx_status(mvm, sta, tid, tx_info, false);
2049         }
2050
2051 out:
2052         rcu_read_unlock();
2053
2054         while (!skb_queue_empty(&reclaimed_skbs)) {
2055                 skb = __skb_dequeue(&reclaimed_skbs);
2056                 ieee80211_tx_status(mvm->hw, skb);
2057         }
2058 }
2059
2060 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
2061 {
2062         struct iwl_rx_packet *pkt = rxb_addr(rxb);
2063         unsigned int pkt_len = iwl_rx_packet_payload_len(pkt);
2064         int sta_id, tid, txq, index;
2065         struct ieee80211_tx_info ba_info = {};
2066         struct iwl_mvm_ba_notif *ba_notif;
2067         struct iwl_mvm_tid_data *tid_data;
2068         struct iwl_mvm_sta *mvmsta;
2069
2070         ba_info.flags = IEEE80211_TX_STAT_AMPDU;
2071
2072         if (iwl_mvm_has_new_tx_api(mvm)) {
2073                 struct iwl_mvm_compressed_ba_notif *ba_res =
2074                         (void *)pkt->data;
2075                 u8 lq_color = TX_RES_RATE_TABLE_COL_GET(ba_res->tlc_rate_info);
2076                 u16 tfd_cnt;
2077                 int i;
2078
2079                 if (IWL_FW_CHECK(mvm, sizeof(*ba_res) > pkt_len,
2080                                  "short BA notification (%d)\n", pkt_len))
2081                         return;
2082
2083                 sta_id = ba_res->sta_id;
2084                 ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done);
2085                 ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed);
2086                 ba_info.status.tx_time =
2087                         (u16)le32_to_cpu(ba_res->wireless_time);
2088                 ba_info.status.status_driver_data[0] =
2089                         (void *)(uintptr_t)ba_res->reduced_txp;
2090
2091                 tfd_cnt = le16_to_cpu(ba_res->tfd_cnt);
2092                 if (!tfd_cnt)
2093                         return;
2094
2095                 if (IWL_FW_CHECK(mvm,
2096                                  struct_size(ba_res, tfd, tfd_cnt) > pkt_len,
2097                                  "short BA notification (tfds:%d, size:%d)\n",
2098                                  tfd_cnt, pkt_len))
2099                         return;
2100
2101                 rcu_read_lock();
2102
2103                 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
2104                 /*
2105                  * It's possible to get a BA response after invalidating the rcu
2106                  * (rcu is invalidated in order to prevent new Tx from being
2107                  * sent, but there may be some frames already in-flight).
2108                  * In this case we just want to reclaim, and could skip all the
2109                  * sta-dependent stuff since it's in the middle of being removed
2110                  * anyways.
2111                  */
2112
2113                 /* Free per TID */
2114                 for (i = 0; i < tfd_cnt; i++) {
2115                         struct iwl_mvm_compressed_ba_tfd *ba_tfd =
2116                                 &ba_res->tfd[i];
2117
2118                         tid = ba_tfd->tid;
2119                         if (tid == IWL_MGMT_TID)
2120                                 tid = IWL_MAX_TID_COUNT;
2121
2122                         if (mvmsta)
2123                                 mvmsta->tid_data[i].lq_color = lq_color;
2124
2125                         iwl_mvm_tx_reclaim(mvm, sta_id, tid,
2126                                            (int)(le16_to_cpu(ba_tfd->q_num)),
2127                                            le16_to_cpu(ba_tfd->tfd_index),
2128                                            &ba_info,
2129                                            le32_to_cpu(ba_res->tx_rate), false);
2130                 }
2131
2132                 if (mvmsta)
2133                         iwl_mvm_tx_airtime(mvm, mvmsta,
2134                                            le32_to_cpu(ba_res->wireless_time));
2135                 rcu_read_unlock();
2136
2137                 IWL_DEBUG_TX_REPLY(mvm,
2138                                    "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n",
2139                                    sta_id, le32_to_cpu(ba_res->flags),
2140                                    le16_to_cpu(ba_res->txed),
2141                                    le16_to_cpu(ba_res->done));
2142                 return;
2143         }
2144
2145         ba_notif = (void *)pkt->data;
2146         sta_id = ba_notif->sta_id;
2147         tid = ba_notif->tid;
2148         /* "flow" corresponds to Tx queue */
2149         txq = le16_to_cpu(ba_notif->scd_flow);
2150         /* "ssn" is start of block-ack Tx window, corresponds to index
2151          * (in Tx queue's circular buffer) of first TFD/frame in window */
2152         index = le16_to_cpu(ba_notif->scd_ssn);
2153
2154         rcu_read_lock();
2155         mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
2156         if (IWL_FW_CHECK(mvm, !mvmsta,
2157                          "invalid STA ID %d in BA notif\n",
2158                          sta_id)) {
2159                 rcu_read_unlock();
2160                 return;
2161         }
2162
2163         tid_data = &mvmsta->tid_data[tid];
2164
2165         ba_info.status.ampdu_ack_len = ba_notif->txed_2_done;
2166         ba_info.status.ampdu_len = ba_notif->txed;
2167         ba_info.status.tx_time = tid_data->tx_time;
2168         ba_info.status.status_driver_data[0] =
2169                 (void *)(uintptr_t)ba_notif->reduced_txp;
2170
2171         rcu_read_unlock();
2172
2173         iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info,
2174                            tid_data->rate_n_flags, false);
2175
2176         IWL_DEBUG_TX_REPLY(mvm,
2177                            "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
2178                            ba_notif->sta_addr, ba_notif->sta_id);
2179
2180         IWL_DEBUG_TX_REPLY(mvm,
2181                            "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
2182                            ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl),
2183                            le64_to_cpu(ba_notif->bitmap), txq, index,
2184                            ba_notif->txed, ba_notif->txed_2_done);
2185
2186         IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n",
2187                            ba_notif->reduced_txp);
2188 }
2189
2190 /*
2191  * Note that there are transports that buffer frames before they reach
2192  * the firmware. This means that after flush_tx_path is called, the
2193  * queue might not be empty. The race-free way to handle this is to:
2194  * 1) set the station as draining
2195  * 2) flush the Tx path
2196  * 3) wait for the transport queues to be empty
2197  */
2198 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk)
2199 {
2200         int ret;
2201         struct iwl_tx_path_flush_cmd_v1 flush_cmd = {
2202                 .queues_ctl = cpu_to_le32(tfd_msk),
2203                 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH),
2204         };
2205
2206         WARN_ON(iwl_mvm_has_new_tx_api(mvm));
2207         ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, 0,
2208                                    sizeof(flush_cmd), &flush_cmd);
2209         if (ret)
2210                 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
2211         return ret;
2212 }
2213
2214 int iwl_mvm_flush_sta_tids(struct iwl_mvm *mvm, u32 sta_id, u16 tids)
2215 {
2216         int ret;
2217         struct iwl_tx_path_flush_cmd_rsp *rsp;
2218         struct iwl_tx_path_flush_cmd flush_cmd = {
2219                 .sta_id = cpu_to_le32(sta_id),
2220                 .tid_mask = cpu_to_le16(tids),
2221         };
2222
2223         struct iwl_host_cmd cmd = {
2224                 .id = TXPATH_FLUSH,
2225                 .len = { sizeof(flush_cmd), },
2226                 .data = { &flush_cmd, },
2227         };
2228
2229         WARN_ON(!iwl_mvm_has_new_tx_api(mvm));
2230
2231         if (iwl_fw_lookup_notif_ver(mvm->fw, LONG_GROUP, TXPATH_FLUSH, 0) > 0)
2232                 cmd.flags |= CMD_WANT_SKB;
2233
2234         IWL_DEBUG_TX_QUEUES(mvm, "flush for sta id %d tid mask 0x%x\n",
2235                             sta_id, tids);
2236
2237         ret = iwl_mvm_send_cmd(mvm, &cmd);
2238
2239         if (ret) {
2240                 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
2241                 return ret;
2242         }
2243
2244         if (cmd.flags & CMD_WANT_SKB) {
2245                 int i;
2246                 int num_flushed_queues;
2247
2248                 if (WARN_ON_ONCE(iwl_rx_packet_payload_len(cmd.resp_pkt) != sizeof(*rsp))) {
2249                         ret = -EIO;
2250                         goto free_rsp;
2251                 }
2252
2253                 rsp = (void *)cmd.resp_pkt->data;
2254
2255                 if (WARN_ONCE(le16_to_cpu(rsp->sta_id) != sta_id,
2256                               "sta_id %d != rsp_sta_id %d",
2257                               sta_id, le16_to_cpu(rsp->sta_id))) {
2258                         ret = -EIO;
2259                         goto free_rsp;
2260                 }
2261
2262                 num_flushed_queues = le16_to_cpu(rsp->num_flushed_queues);
2263                 if (WARN_ONCE(num_flushed_queues > IWL_TX_FLUSH_QUEUE_RSP,
2264                               "num_flushed_queues %d", num_flushed_queues)) {
2265                         ret = -EIO;
2266                         goto free_rsp;
2267                 }
2268
2269                 for (i = 0; i < num_flushed_queues; i++) {
2270                         struct ieee80211_tx_info tx_info = {};
2271                         struct iwl_flush_queue_info *queue_info = &rsp->queues[i];
2272                         int tid = le16_to_cpu(queue_info->tid);
2273                         int read_before = le16_to_cpu(queue_info->read_before_flush);
2274                         int read_after = le16_to_cpu(queue_info->read_after_flush);
2275                         int queue_num = le16_to_cpu(queue_info->queue_num);
2276
2277                         if (tid == IWL_MGMT_TID)
2278                                 tid = IWL_MAX_TID_COUNT;
2279
2280                         IWL_DEBUG_TX_QUEUES(mvm,
2281                                             "tid %d queue_id %d read-before %d read-after %d\n",
2282                                             tid, queue_num, read_before, read_after);
2283
2284                         iwl_mvm_tx_reclaim(mvm, sta_id, tid, queue_num, read_after,
2285                                            &tx_info, 0, true);
2286                 }
2287 free_rsp:
2288                 iwl_free_resp(&cmd);
2289         }
2290         return ret;
2291 }
2292
2293 int iwl_mvm_flush_sta(struct iwl_mvm *mvm, void *sta, bool internal)
2294 {
2295         u32 sta_id, tfd_queue_msk;
2296
2297         if (internal) {
2298                 struct iwl_mvm_int_sta *int_sta = sta;
2299
2300                 sta_id = int_sta->sta_id;
2301                 tfd_queue_msk = int_sta->tfd_queue_msk;
2302         } else {
2303                 struct iwl_mvm_sta *mvm_sta = sta;
2304
2305                 sta_id = mvm_sta->deflink.sta_id;
2306                 tfd_queue_msk = mvm_sta->tfd_queue_msk;
2307         }
2308
2309         if (iwl_mvm_has_new_tx_api(mvm))
2310                 return iwl_mvm_flush_sta_tids(mvm, sta_id, 0xffff);
2311
2312         return iwl_mvm_flush_tx_path(mvm, tfd_queue_msk);
2313 }