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, 2018-2022 Intel Corporation
   4  * Copyright (C) 2013-2015 Intel Mobile Communications GmbH
   5  * Copyright (C) 2016-2017 Intel Deutschland GmbH
   6  */
   7 #include <linux/ieee80211.h>
   8 #include <linux/etherdevice.h>
   9 #include <linux/tcp.h>
  10 #include <net/ip.h>
  11 #include <net/ipv6.h>
  12
  13 #include "iwl-trans.h"
  14 #include "iwl-eeprom-parse.h"
  15 #include "mvm.h"
  16 #include "sta.h"
  17 #include "time-sync.h"
  18
  19 static void
  20 iwl_mvm_bar_check_trigger(struct iwl_mvm *mvm, const u8 *addr,
  21                           u16 tid, u16 ssn)
  22 {
  23         struct iwl_fw_dbg_trigger_tlv *trig;
  24         struct iwl_fw_dbg_trigger_ba *ba_trig;
  25
  26         trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, FW_DBG_TRIGGER_BA);
  27         if (!trig)
  28                 return;
  29
  30         ba_trig = (void *)trig->data;
  31
  32         if (!(le16_to_cpu(ba_trig->tx_bar) & BIT(tid)))
  33                 return;
  34
  35         iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
  36                                 "BAR sent to %pM, tid %d, ssn %d",
  37                                 addr, tid, ssn);
  38 }
  39
  40 #define OPT_HDR(type, skb, off) \
  41         (type *)(skb_network_header(skb) + (off))
  42
  43 static u32 iwl_mvm_tx_csum(struct iwl_mvm *mvm, struct sk_buff *skb,
  44                            struct ieee80211_tx_info *info,
  45                            bool amsdu)
  46 {
  47         struct ieee80211_hdr *hdr = (void *)skb->data;
  48         u16 mh_len = ieee80211_hdrlen(hdr->frame_control);
  49         u16 offload_assist = 0;
  50 #if IS_ENABLED(CONFIG_INET)
  51         u8 protocol = 0;
  52
  53         /* Do not compute checksum if already computed */
  54         if (skb->ip_summed != CHECKSUM_PARTIAL)
  55                 goto out;
  56
  57         /* We do not expect to be requested to csum stuff we do not support */
  58         if (WARN_ONCE(!(mvm->hw->netdev_features & IWL_TX_CSUM_NETIF_FLAGS) ||
  59                       (skb->protocol != htons(ETH_P_IP) &&
  60                        skb->protocol != htons(ETH_P_IPV6)),
  61                       "No support for requested checksum\n")) {
  62                 skb_checksum_help(skb);
  63                 goto out;
  64         }
  65
  66         if (skb->protocol == htons(ETH_P_IP)) {
  67                 protocol = ip_hdr(skb)->protocol;
  68         } else {
  69 #if IS_ENABLED(CONFIG_IPV6)
  70                 struct ipv6hdr *ipv6h =
  71                         (struct ipv6hdr *)skb_network_header(skb);
  72                 unsigned int off = sizeof(*ipv6h);
  73
  74                 protocol = ipv6h->nexthdr;
  75                 while (protocol != NEXTHDR_NONE && ipv6_ext_hdr(protocol)) {
  76                         struct ipv6_opt_hdr *hp;
  77
  78                         /* only supported extension headers */
  79                         if (protocol != NEXTHDR_ROUTING &&
  80                             protocol != NEXTHDR_HOP &&
  81                             protocol != NEXTHDR_DEST) {
  82                                 skb_checksum_help(skb);
  83                                 goto out;
  84                         }
  85
  86                         hp = OPT_HDR(struct ipv6_opt_hdr, skb, off);
  87                         protocol = hp->nexthdr;
  88                         off += ipv6_optlen(hp);
  89                 }
  90                 /* if we get here - protocol now should be TCP/UDP */
  91 #endif
  92         }
  93
  94         if (protocol != IPPROTO_TCP && protocol != IPPROTO_UDP) {
  95                 WARN_ON_ONCE(1);
  96                 skb_checksum_help(skb);
  97                 goto out;
  98         }
  99
 100         /* enable L4 csum */
 101         offload_assist |= BIT(TX_CMD_OFFLD_L4_EN);
 102
 103         /*
 104          * Set offset to IP header (snap).
 105          * We don't support tunneling so no need to take care of inner header.
 106          * Size is in words.
 107          */
 108         offload_assist |= (4 << TX_CMD_OFFLD_IP_HDR);
 109
 110         /* Do IPv4 csum for AMSDU only (no IP csum for Ipv6) */
 111         if (skb->protocol == htons(ETH_P_IP) && amsdu) {
 112                 ip_hdr(skb)->check = 0;
 113                 offload_assist |= BIT(TX_CMD_OFFLD_L3_EN);
 114         }
 115
 116         /* reset UDP/TCP header csum */
 117         if (protocol == IPPROTO_TCP)
 118                 tcp_hdr(skb)->check = 0;
 119         else
 120                 udp_hdr(skb)->check = 0;
 121
 122 out:
 123 #endif
 124         /*
 125          * mac header len should include IV, size is in words unless
 126          * the IV is added by the firmware like in WEP.
 127          * In new Tx API, the IV is always added by the firmware.
 128          */
 129         if (!iwl_mvm_has_new_tx_api(mvm) && info->control.hw_key &&
 130             info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP40 &&
 131             info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP104)
 132                 mh_len += info->control.hw_key->iv_len;
 133         mh_len /= 2;
 134         offload_assist |= mh_len << TX_CMD_OFFLD_MH_SIZE;
 135
 136         if (amsdu)
 137                 offload_assist |= BIT(TX_CMD_OFFLD_AMSDU);
 138         else if (ieee80211_hdrlen(hdr->frame_control) % 4)
 139                 /* padding is inserted later in transport */
 140                 offload_assist |= BIT(TX_CMD_OFFLD_PAD);
 141
 142         return offload_assist;
 143 }
 144
 145 /*
 146  * Sets most of the Tx cmd's fields
 147  */
 148 void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb,
 149                         struct iwl_tx_cmd *tx_cmd,
 150                         struct ieee80211_tx_info *info, u8 sta_id)
 151 {
 152         struct ieee80211_hdr *hdr = (void *)skb->data;
 153         __le16 fc = hdr->frame_control;
 154         u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags);
 155         u32 len = skb->len + FCS_LEN;
 156         bool amsdu = false;
 157         u8 ac;
 158
 159         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) ||
 160             (ieee80211_is_probe_resp(fc) &&
 161              !is_multicast_ether_addr(hdr->addr1)))
 162                 tx_flags |= TX_CMD_FLG_ACK;
 163         else
 164                 tx_flags &= ~TX_CMD_FLG_ACK;
 165
 166         if (ieee80211_is_probe_resp(fc))
 167                 tx_flags |= TX_CMD_FLG_TSF;
 168
 169         if (ieee80211_has_morefrags(fc))
 170                 tx_flags |= TX_CMD_FLG_MORE_FRAG;
 171
 172         if (ieee80211_is_data_qos(fc)) {
 173                 u8 *qc = ieee80211_get_qos_ctl(hdr);
 174                 tx_cmd->tid_tspec = qc[0] & 0xf;
 175                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
 176                 amsdu = *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT;
 177         } else if (ieee80211_is_back_req(fc)) {
 178                 struct ieee80211_bar *bar = (void *)skb->data;
 179                 u16 control = le16_to_cpu(bar->control);
 180                 u16 ssn = le16_to_cpu(bar->start_seq_num);
 181
 182                 tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR;
 183                 tx_cmd->tid_tspec = (control &
 184                                      IEEE80211_BAR_CTRL_TID_INFO_MASK) >>
 185                         IEEE80211_BAR_CTRL_TID_INFO_SHIFT;
 186                 WARN_ON_ONCE(tx_cmd->tid_tspec >= IWL_MAX_TID_COUNT);
 187                 iwl_mvm_bar_check_trigger(mvm, bar->ra, tx_cmd->tid_tspec,
 188                                           ssn);
 189         } else {
 190                 if (ieee80211_is_data(fc))
 191                         tx_cmd->tid_tspec = IWL_TID_NON_QOS;
 192                 else
 193                         tx_cmd->tid_tspec = IWL_MAX_TID_COUNT;
 194
 195                 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
 196                         tx_flags |= TX_CMD_FLG_SEQ_CTL;
 197                 else
 198                         tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
 199         }
 200
 201         /* Default to 0 (BE) when tid_spec is set to IWL_MAX_TID_COUNT */
 202         if (tx_cmd->tid_tspec < IWL_MAX_TID_COUNT)
 203                 ac = tid_to_mac80211_ac[tx_cmd->tid_tspec];
 204         else
 205                 ac = tid_to_mac80211_ac[0];
 206
 207         tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) <<
 208                         TX_CMD_FLG_BT_PRIO_POS;
 209
 210         if (ieee80211_is_mgmt(fc)) {
 211                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
 212                         tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_ASSOC);
 213                 else if (ieee80211_is_action(fc))
 214                         tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
 215                 else
 216                         tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
 217
 218                 /* The spec allows Action frames in A-MPDU, we don't support
 219                  * it
 220                  */
 221                 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU);
 222         } else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) {
 223                 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
 224         } else {
 225                 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
 226         }
 227
 228         if (ieee80211_is_data(fc) && len > mvm->rts_threshold &&
 229             !is_multicast_ether_addr(hdr->addr1))
 230                 tx_flags |= TX_CMD_FLG_PROT_REQUIRE;
 231
 232         if (fw_has_capa(&mvm->fw->ucode_capa,
 233                         IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT) &&
 234             ieee80211_action_contains_tpc(skb))
 235                 tx_flags |= TX_CMD_FLG_WRITE_TX_POWER;
 236
 237         tx_cmd->tx_flags = cpu_to_le32(tx_flags);
 238         /* Total # bytes to be transmitted - PCIe code will adjust for A-MSDU */
 239         tx_cmd->len = cpu_to_le16((u16)skb->len);
 240         tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
 241         tx_cmd->sta_id = sta_id;
 242
 243         tx_cmd->offload_assist =
 244                 cpu_to_le16(iwl_mvm_tx_csum(mvm, skb, info, amsdu));
 245 }
 246
 247 static u32 iwl_mvm_get_tx_ant(struct iwl_mvm *mvm,
 248                               struct ieee80211_tx_info *info,
 249                               struct ieee80211_sta *sta, __le16 fc)
 250 {
 251         if (info->band == NL80211_BAND_2GHZ &&
 252             !iwl_mvm_bt_coex_is_shared_ant_avail(mvm))
 253                 return mvm->cfg->non_shared_ant << RATE_MCS_ANT_POS;
 254
 255         if (sta && ieee80211_is_data(fc)) {
 256                 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 257
 258                 return BIT(mvmsta->tx_ant) << RATE_MCS_ANT_POS;
 259         }
 260
 261         return BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS;
 262 }
 263
 264 static u32 iwl_mvm_get_inject_tx_rate(struct iwl_mvm *mvm,
 265                                       struct ieee80211_tx_info *info)
 266 {
 267         struct ieee80211_tx_rate *rate = &info->control.rates[0];
 268         u32 result;
 269
 270         /*
 271          * we only care about legacy/HT/VHT so far, so we can
 272          * build in v1 and use iwl_new_rate_from_v1()
 273          */
 274
 275         if (rate->flags & IEEE80211_TX_RC_VHT_MCS) {
 276                 u8 mcs = ieee80211_rate_get_vht_mcs(rate);
 277                 u8 nss = ieee80211_rate_get_vht_nss(rate);
 278
 279                 result = RATE_MCS_VHT_MSK_V1;
 280                 result |= u32_encode_bits(mcs, RATE_VHT_MCS_RATE_CODE_MSK);
 281                 result |= u32_encode_bits(nss, RATE_MCS_NSS_MSK);
 282                 if (rate->flags & IEEE80211_TX_RC_SHORT_GI)
 283                         result |= RATE_MCS_SGI_MSK_V1;
 284                 if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
 285                         result |= u32_encode_bits(1, RATE_MCS_CHAN_WIDTH_MSK_V1);
 286                 else if (rate->flags & IEEE80211_TX_RC_80_MHZ_WIDTH)
 287                         result |= u32_encode_bits(2, RATE_MCS_CHAN_WIDTH_MSK_V1);
 288                 else if (rate->flags & IEEE80211_TX_RC_160_MHZ_WIDTH)
 289                         result |= u32_encode_bits(3, RATE_MCS_CHAN_WIDTH_MSK_V1);
 290         } else if (rate->flags & IEEE80211_TX_RC_MCS) {
 291                 result = RATE_MCS_HT_MSK_V1;
 292                 result |= u32_encode_bits(rate->idx,
 293                                           RATE_HT_MCS_RATE_CODE_MSK_V1 |
 294                                           RATE_HT_MCS_NSS_MSK_V1);
 295                 if (rate->flags & IEEE80211_TX_RC_SHORT_GI)
 296                         result |= RATE_MCS_SGI_MSK_V1;
 297                 if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
 298                         result |= u32_encode_bits(1, RATE_MCS_CHAN_WIDTH_MSK_V1);
 299                 if (info->flags & IEEE80211_TX_CTL_LDPC)
 300                         result |= RATE_MCS_LDPC_MSK_V1;
 301                 if (u32_get_bits(info->flags, IEEE80211_TX_CTL_STBC))
 302                         result |= RATE_MCS_STBC_MSK;
 303         } else {
 304                 return 0;
 305         }
 306
 307         if (iwl_fw_lookup_notif_ver(mvm->fw, LONG_GROUP, TX_CMD, 0) > 6)
 308                 return iwl_new_rate_from_v1(result);
 309         return result;
 310 }
 311
 312 static u32 iwl_mvm_get_tx_rate(struct iwl_mvm *mvm,
 313                                struct ieee80211_tx_info *info,
 314                                struct ieee80211_sta *sta, __le16 fc)
 315 {
 316         int rate_idx = -1;
 317         u8 rate_plcp;
 318         u32 rate_flags = 0;
 319         bool is_cck;
 320
 321         if (unlikely(info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT)) {
 322                 u32 result = iwl_mvm_get_inject_tx_rate(mvm, info);
 323
 324                 if (result)
 325                         return result;
 326                 rate_idx = info->control.rates[0].idx;
 327         } else if (!ieee80211_hw_check(mvm->hw, HAS_RATE_CONTROL)) {
 328                 /* info->control is only relevant for non HW rate control */
 329
 330                 /* HT rate doesn't make sense for a non data frame */
 331                 WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS &&
 332                           !ieee80211_is_data(fc),
 333                           "Got a HT rate (flags:0x%x/mcs:%d/fc:0x%x/state:%d) for a non data frame\n",
 334                           info->control.rates[0].flags,
 335                           info->control.rates[0].idx,
 336                           le16_to_cpu(fc),
 337                           sta ? iwl_mvm_sta_from_mac80211(sta)->sta_state : -1);
 338
 339                 rate_idx = info->control.rates[0].idx;
 340
 341                 /* For non 2 GHZ band, remap mac80211 rate indices into driver
 342                  * indices.
 343                  */
 344                 if (info->band != NL80211_BAND_2GHZ ||
 345                     (info->flags & IEEE80211_TX_CTL_NO_CCK_RATE))
 346                         rate_idx += IWL_FIRST_OFDM_RATE;
 347
 348                 /* For 2.4 GHZ band, check that there is no need to remap */
 349                 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
 350         }
 351
 352         /* if the rate isn't a well known legacy rate, take the lowest one */
 353         if (rate_idx < 0 || rate_idx >= IWL_RATE_COUNT_LEGACY)
 354                 rate_idx = iwl_mvm_mac_ctxt_get_lowest_rate(mvm,
 355                                                             info,
 356                                                             info->control.vif);
 357
 358         /* Get PLCP rate for tx_cmd->rate_n_flags */
 359         rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(mvm->fw, rate_idx);
 360         is_cck = (rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE);
 361
 362         /* Set CCK or OFDM flag */
 363         if (iwl_fw_lookup_cmd_ver(mvm->fw, TX_CMD, 0) > 8) {
 364                 if (!is_cck)
 365                         rate_flags |= RATE_MCS_LEGACY_OFDM_MSK;
 366                 else
 367                         rate_flags |= RATE_MCS_CCK_MSK;
 368         } else if (is_cck) {
 369                 rate_flags |= RATE_MCS_CCK_MSK_V1;
 370         }
 371
 372         return (u32)rate_plcp | rate_flags;
 373 }
 374
 375 static u32 iwl_mvm_get_tx_rate_n_flags(struct iwl_mvm *mvm,
 376                                        struct ieee80211_tx_info *info,
 377                                        struct ieee80211_sta *sta, __le16 fc)
 378 {
 379         return iwl_mvm_get_tx_rate(mvm, info, sta, fc) |
 380                 iwl_mvm_get_tx_ant(mvm, info, sta, fc);
 381 }
 382
 383 /*
 384  * Sets the fields in the Tx cmd that are rate related
 385  */
 386 void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd,
 387                             struct ieee80211_tx_info *info,
 388                             struct ieee80211_sta *sta, __le16 fc)
 389 {
 390         /* Set retry limit on RTS packets */
 391         tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT;
 392
 393         /* Set retry limit on DATA packets and Probe Responses*/
 394         if (ieee80211_is_probe_resp(fc)) {
 395                 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT;
 396                 tx_cmd->rts_retry_limit =
 397                         min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit);
 398         } else if (ieee80211_is_back_req(fc)) {
 399                 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT;
 400         } else {
 401                 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY;
 402         }
 403
 404         /*
 405          * for data packets, rate info comes from the table inside the fw. This
 406          * table is controlled by LINK_QUALITY commands
 407          */
 408
 409         if (likely(ieee80211_is_data(fc) && sta &&
 410                    !(info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT))) {
 411                 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 412
 413                 if (mvmsta->sta_state >= IEEE80211_STA_AUTHORIZED) {
 414                         tx_cmd->initial_rate_index = 0;
 415                         tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE);
 416                         return;
 417                 }
 418         } else if (ieee80211_is_back_req(fc)) {
 419                 tx_cmd->tx_flags |=
 420                         cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR);
 421         }
 422
 423         /* Set the rate in the TX cmd */
 424         tx_cmd->rate_n_flags =
 425                 cpu_to_le32(iwl_mvm_get_tx_rate_n_flags(mvm, info, sta, fc));
 426 }
 427
 428 static inline void iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info *info,
 429                                          u8 *crypto_hdr)
 430 {
 431         struct ieee80211_key_conf *keyconf = info->control.hw_key;
 432         u64 pn;
 433
 434         pn = atomic64_inc_return(&keyconf->tx_pn);
 435         crypto_hdr[0] = pn;
 436         crypto_hdr[2] = 0;
 437         crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6);
 438         crypto_hdr[1] = pn >> 8;
 439         crypto_hdr[4] = pn >> 16;
 440         crypto_hdr[5] = pn >> 24;
 441         crypto_hdr[6] = pn >> 32;
 442         crypto_hdr[7] = pn >> 40;
 443 }
 444
 445 /*
 446  * Sets the fields in the Tx cmd that are crypto related
 447  */
 448 static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm,
 449                                       struct ieee80211_tx_info *info,
 450                                       struct iwl_tx_cmd *tx_cmd,
 451                                       struct sk_buff *skb_frag,
 452                                       int hdrlen)
 453 {
 454         struct ieee80211_key_conf *keyconf = info->control.hw_key;
 455         u8 *crypto_hdr = skb_frag->data + hdrlen;
 456         enum iwl_tx_cmd_sec_ctrl type = TX_CMD_SEC_CCM;
 457         u64 pn;
 458
 459         switch (keyconf->cipher) {
 460         case WLAN_CIPHER_SUITE_CCMP:
 461                 iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd);
 462                 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr);
 463                 break;
 464
 465         case WLAN_CIPHER_SUITE_TKIP:
 466                 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
 467                 pn = atomic64_inc_return(&keyconf->tx_pn);
 468                 ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn);
 469                 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
 470                 break;
 471
 472         case WLAN_CIPHER_SUITE_WEP104:
 473                 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
 474                 fallthrough;
 475         case WLAN_CIPHER_SUITE_WEP40:
 476                 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP |
 477                         ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) &
 478                           TX_CMD_SEC_WEP_KEY_IDX_MSK);
 479
 480                 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
 481                 break;
 482         case WLAN_CIPHER_SUITE_GCMP:
 483         case WLAN_CIPHER_SUITE_GCMP_256:
 484                 type = TX_CMD_SEC_GCMP;
 485                 fallthrough;
 486         case WLAN_CIPHER_SUITE_CCMP_256:
 487                 /* TODO: Taking the key from the table might introduce a race
 488                  * when PTK rekeying is done, having an old packets with a PN
 489                  * based on the old key but the message encrypted with a new
 490                  * one.
 491                  * Need to handle this.
 492                  */
 493                 tx_cmd->sec_ctl |= type | TX_CMD_SEC_KEY_FROM_TABLE;
 494                 tx_cmd->key[0] = keyconf->hw_key_idx;
 495                 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr);
 496                 break;
 497         default:
 498                 tx_cmd->sec_ctl |= TX_CMD_SEC_EXT;
 499         }
 500 }
 501
 502 /*
 503  * Allocates and sets the Tx cmd the driver data pointers in the skb
 504  */
 505 static struct iwl_device_tx_cmd *
 506 iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb,
 507                       struct ieee80211_tx_info *info, int hdrlen,
 508                       struct ieee80211_sta *sta, u8 sta_id)
 509 {
 510         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 511         struct iwl_device_tx_cmd *dev_cmd;
 512         struct iwl_tx_cmd *tx_cmd;
 513
 514         dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans);
 515
 516         if (unlikely(!dev_cmd))
 517                 return NULL;
 518
 519         dev_cmd->hdr.cmd = TX_CMD;
 520
 521         if (iwl_mvm_has_new_tx_api(mvm)) {
 522                 u32 rate_n_flags = 0;
 523                 u16 flags = 0;
 524                 struct iwl_mvm_sta *mvmsta = sta ?
 525                         iwl_mvm_sta_from_mac80211(sta) : NULL;
 526                 bool amsdu = false;
 527
 528                 if (ieee80211_is_data_qos(hdr->frame_control)) {
 529                         u8 *qc = ieee80211_get_qos_ctl(hdr);
 530
 531                         amsdu = *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT;
 532                 }
 533
 534                 if (!info->control.hw_key)
 535                         flags |= IWL_TX_FLAGS_ENCRYPT_DIS;
 536
 537                 /*
 538                  * For data packets rate info comes from the fw. Only
 539                  * set rate/antenna during connection establishment or in case
 540                  * no station is given.
 541                  */
 542                 if (!sta || !ieee80211_is_data(hdr->frame_control) ||
 543                     mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) {
 544                         flags |= IWL_TX_FLAGS_CMD_RATE;
 545                         rate_n_flags =
 546                                 iwl_mvm_get_tx_rate_n_flags(mvm, info, sta,
 547                                                             hdr->frame_control);
 548                 }
 549
 550                 if (mvm->trans->trans_cfg->device_family >=
 551                     IWL_DEVICE_FAMILY_AX210) {
 552                         struct iwl_tx_cmd_gen3 *cmd = (void *)dev_cmd->payload;
 553                         u32 offload_assist = iwl_mvm_tx_csum(mvm, skb,
 554                                                              info, amsdu);
 555
 556                         cmd->offload_assist = cpu_to_le32(offload_assist);
 557
 558                         /* Total # bytes to be transmitted */
 559                         cmd->len = cpu_to_le16((u16)skb->len);
 560
 561                         /* Copy MAC header from skb into command buffer */
 562                         memcpy(cmd->hdr, hdr, hdrlen);
 563
 564                         cmd->flags = cpu_to_le16(flags);
 565                         cmd->rate_n_flags = cpu_to_le32(rate_n_flags);
 566                 } else {
 567                         struct iwl_tx_cmd_gen2 *cmd = (void *)dev_cmd->payload;
 568                         u16 offload_assist = iwl_mvm_tx_csum(mvm, skb,
 569                                                              info, amsdu);
 570
 571                         cmd->offload_assist = cpu_to_le16(offload_assist);
 572
 573                         /* Total # bytes to be transmitted */
 574                         cmd->len = cpu_to_le16((u16)skb->len);
 575
 576                         /* Copy MAC header from skb into command buffer */
 577                         memcpy(cmd->hdr, hdr, hdrlen);
 578
 579                         cmd->flags = cpu_to_le32(flags);
 580                         cmd->rate_n_flags = cpu_to_le32(rate_n_flags);
 581                 }
 582                 goto out;
 583         }
 584
 585         tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
 586
 587         if (info->control.hw_key)
 588                 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen);
 589
 590         iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id);
 591
 592         iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control);
 593
 594         /* Copy MAC header from skb into command buffer */
 595         memcpy(tx_cmd->hdr, hdr, hdrlen);
 596
 597 out:
 598         return dev_cmd;
 599 }
 600
 601 static void iwl_mvm_skb_prepare_status(struct sk_buff *skb,
 602                                        struct iwl_device_tx_cmd *cmd)
 603 {
 604         struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb);
 605
 606         memset(&skb_info->status, 0, sizeof(skb_info->status));
 607         memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data));
 608
 609         skb_info->driver_data[1] = cmd;
 610 }
 611
 612 static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm,
 613                                       struct iwl_mvm_vif_link_info *link,
 614                                       struct ieee80211_tx_info *info,
 615                                       struct sk_buff *skb)
 616 {
 617         struct ieee80211_hdr *hdr = (void *)skb->data;
 618         __le16 fc = hdr->frame_control;
 619
 620         switch (info->control.vif->type) {
 621         case NL80211_IFTYPE_AP:
 622         case NL80211_IFTYPE_ADHOC:
 623                 /*
 624                  * Non-bufferable frames use the broadcast station, thus they
 625                  * use the probe queue.
 626                  * Also take care of the case where we send a deauth to a
 627                  * station that we don't have, or similarly an association
 628                  * response (with non-success status) for a station we can't
 629                  * accept.
 630                  * Also, disassociate frames might happen, particular with
 631                  * reason 7 ("Class 3 frame received from nonassociated STA").
 632                  */
 633                 if (ieee80211_is_mgmt(fc) &&
 634                     (!ieee80211_is_bufferable_mmpdu(skb) ||
 635                      ieee80211_is_deauth(fc) || ieee80211_is_disassoc(fc)))
 636                         return link->mgmt_queue;
 637
 638                 if (!ieee80211_has_order(fc) && !ieee80211_is_probe_req(fc) &&
 639                     is_multicast_ether_addr(hdr->addr1))
 640                         return link->cab_queue;
 641
 642                 WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC,
 643                           "fc=0x%02x", le16_to_cpu(fc));
 644                 return link->mgmt_queue;
 645         case NL80211_IFTYPE_P2P_DEVICE:
 646                 if (ieee80211_is_mgmt(fc))
 647                         return mvm->p2p_dev_queue;
 648
 649                 WARN_ON_ONCE(1);
 650                 return mvm->p2p_dev_queue;
 651         default:
 652                 WARN_ONCE(1, "Not a ctrl vif, no available queue\n");
 653                 return -1;
 654         }
 655 }
 656
 657 static void iwl_mvm_probe_resp_set_noa(struct iwl_mvm *mvm,
 658                                        struct sk_buff *skb)
 659 {
 660         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 661         struct iwl_mvm_vif *mvmvif =
 662                 iwl_mvm_vif_from_mac80211(info->control.vif);
 663         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
 664         int base_len = (u8 *)mgmt->u.probe_resp.variable - (u8 *)mgmt;
 665         struct iwl_probe_resp_data *resp_data;
 666         const u8 *ie;
 667         u8 *pos;
 668         u8 match[] = {
 669                 (WLAN_OUI_WFA >> 16) & 0xff,
 670                 (WLAN_OUI_WFA >> 8) & 0xff,
 671                 WLAN_OUI_WFA & 0xff,
 672                 WLAN_OUI_TYPE_WFA_P2P,
 673         };
 674
 675         rcu_read_lock();
 676
 677         resp_data = rcu_dereference(mvmvif->deflink.probe_resp_data);
 678         if (!resp_data)
 679                 goto out;
 680
 681         if (!resp_data->notif.noa_active)
 682                 goto out;
 683
 684         ie = cfg80211_find_ie_match(WLAN_EID_VENDOR_SPECIFIC,
 685                                     mgmt->u.probe_resp.variable,
 686                                     skb->len - base_len,
 687                                     match, 4, 2);
 688         if (!ie) {
 689                 IWL_DEBUG_TX(mvm, "probe resp doesn't have P2P IE\n");
 690                 goto out;
 691         }
 692
 693         if (skb_tailroom(skb) < resp_data->noa_len) {
 694                 if (pskb_expand_head(skb, 0, resp_data->noa_len, GFP_ATOMIC)) {
 695                         IWL_ERR(mvm,
 696                                 "Failed to reallocate probe resp\n");
 697                         goto out;
 698                 }
 699         }
 700
 701         pos = skb_put(skb, resp_data->noa_len);
 702
 703         *pos++ = WLAN_EID_VENDOR_SPECIFIC;
 704         /* Set length of IE body (not including ID and length itself) */
 705         *pos++ = resp_data->noa_len - 2;
 706         *pos++ = (WLAN_OUI_WFA >> 16) & 0xff;
 707         *pos++ = (WLAN_OUI_WFA >> 8) & 0xff;
 708         *pos++ = WLAN_OUI_WFA & 0xff;
 709         *pos++ = WLAN_OUI_TYPE_WFA_P2P;
 710
 711         memcpy(pos, &resp_data->notif.noa_attr,
 712                resp_data->noa_len - sizeof(struct ieee80211_vendor_ie));
 713
 714 out:
 715         rcu_read_unlock();
 716 }
 717
 718 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb)
 719 {
 720         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 721         struct ieee80211_tx_info info;
 722         struct iwl_device_tx_cmd *dev_cmd;
 723         u8 sta_id;
 724         int hdrlen = ieee80211_hdrlen(hdr->frame_control);
 725         __le16 fc = hdr->frame_control;
 726         bool offchannel = IEEE80211_SKB_CB(skb)->flags &
 727                 IEEE80211_TX_CTL_TX_OFFCHAN;
 728         int queue = -1;
 729
 730         if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc))
 731                 return -1;
 732
 733         memcpy(&info, skb->cb, sizeof(info));
 734
 735         if (WARN_ON_ONCE(skb->len > IEEE80211_MAX_DATA_LEN + hdrlen))
 736                 return -1;
 737
 738         if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU))
 739                 return -1;
 740
 741         if (info.control.vif) {
 742                 struct iwl_mvm_vif *mvmvif =
 743                         iwl_mvm_vif_from_mac80211(info.control.vif);
 744
 745                 if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE ||
 746                     info.control.vif->type == NL80211_IFTYPE_AP ||
 747                     info.control.vif->type == NL80211_IFTYPE_ADHOC) {
 748                         u32 link_id = u32_get_bits(info.control.flags,
 749                                                    IEEE80211_TX_CTRL_MLO_LINK);
 750                         struct iwl_mvm_vif_link_info *link;
 751
 752                         if (link_id == IEEE80211_LINK_UNSPECIFIED) {
 753                                 if (info.control.vif->active_links)
 754                                         link_id = ffs(info.control.vif->active_links) - 1;
 755                                 else
 756                                         link_id = 0;
 757                         }
 758
 759                         link = mvmvif->link[link_id];
 760
 761                         if (!ieee80211_is_data(hdr->frame_control))
 762                                 sta_id = link->bcast_sta.sta_id;
 763                         else
 764                                 sta_id = link->mcast_sta.sta_id;
 765
 766                         queue = iwl_mvm_get_ctrl_vif_queue(mvm, link, &info,
 767                                                            skb);
 768                 } else if (info.control.vif->type == NL80211_IFTYPE_MONITOR) {
 769                         queue = mvm->snif_queue;
 770                         sta_id = mvm->snif_sta.sta_id;
 771                 } else if (info.control.vif->type == NL80211_IFTYPE_STATION &&
 772                            offchannel) {
 773                         /*
 774                          * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets
 775                          * that can be used in 2 different types of vifs, P2P &
 776                          * STATION.
 777                          * P2P uses the offchannel queue.
 778                          * STATION (HS2.0) uses the auxiliary context of the FW,
 779                          * and hence needs to be sent on the aux queue.
 780                          */
 781                         sta_id = mvm->aux_sta.sta_id;
 782                         queue = mvm->aux_queue;
 783                 }
 784         }
 785
 786         if (queue < 0) {
 787                 IWL_ERR(mvm, "No queue was found. Dropping TX\n");
 788                 return -1;
 789         }
 790
 791         if (unlikely(ieee80211_is_probe_resp(fc)))
 792                 iwl_mvm_probe_resp_set_noa(mvm, skb);
 793
 794         IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue);
 795
 796         dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id);
 797         if (!dev_cmd)
 798                 return -1;
 799
 800         /* From now on, we cannot access info->control */
 801         iwl_mvm_skb_prepare_status(skb, dev_cmd);
 802
 803         if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) {
 804                 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
 805                 return -1;
 806         }
 807
 808         return 0;
 809 }
 810
 811 unsigned int iwl_mvm_max_amsdu_size(struct iwl_mvm *mvm,
 812                                     struct ieee80211_sta *sta, unsigned int tid)
 813 {
 814         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 815         u8 ac = tid_to_mac80211_ac[tid];
 816         enum nl80211_band band;
 817         unsigned int txf;
 818         unsigned int val;
 819         int lmac;
 820
 821         /* For HE redirect to trigger based fifos */
 822         if (sta->deflink.he_cap.has_he && !WARN_ON(!iwl_mvm_has_new_tx_api(mvm)))
 823                 ac += 4;
 824
 825         txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac);
 826
 827         /*
 828          * Don't send an AMSDU that will be longer than the TXF.
 829          * Add a security margin of 256 for the TX command + headers.
 830          * We also want to have the start of the next packet inside the
 831          * fifo to be able to send bursts.
 832          */
 833         val = mvmsta->max_amsdu_len;
 834
 835         if (hweight16(sta->valid_links) <= 1) {
 836                 if (sta->valid_links) {
 837                         struct ieee80211_bss_conf *link_conf;
 838                         unsigned int link = ffs(sta->valid_links) - 1;
 839
 840                         rcu_read_lock();
 841                         link_conf = rcu_dereference(mvmsta->vif->link_conf[link]);
 842                         if (WARN_ON(!link_conf))
 843                                 band = NL80211_BAND_2GHZ;
 844                         else
 845                                 band = link_conf->chandef.chan->band;
 846                         rcu_read_unlock();
 847                 } else {
 848                         band = mvmsta->vif->bss_conf.chandef.chan->band;
 849                 }
 850
 851                 lmac = iwl_mvm_get_lmac_id(mvm, band);
 852         } else if (fw_has_capa(&mvm->fw->ucode_capa,
 853                                IWL_UCODE_TLV_CAPA_CDB_SUPPORT)) {
 854                 /* for real MLO restrict to both LMACs if they exist */
 855                 lmac = IWL_LMAC_5G_INDEX;
 856                 val = min_t(unsigned int, val,
 857                             mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256);
 858                 lmac = IWL_LMAC_24G_INDEX;
 859         } else {
 860                 lmac = IWL_LMAC_24G_INDEX;
 861         }
 862
 863         return min_t(unsigned int, val,
 864                      mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256);
 865 }
 866
 867 #ifdef CONFIG_INET
 868
 869 static int
 870 iwl_mvm_tx_tso_segment(struct sk_buff *skb, unsigned int num_subframes,
 871                        netdev_features_t netdev_flags,
 872                        struct sk_buff_head *mpdus_skb)
 873 {
 874         struct sk_buff *tmp, *next;
 875         struct ieee80211_hdr *hdr = (void *)skb->data;
 876         char cb[sizeof(skb->cb)];
 877         u16 i = 0;
 878         unsigned int tcp_payload_len;
 879         unsigned int mss = skb_shinfo(skb)->gso_size;
 880         bool ipv4 = (skb->protocol == htons(ETH_P_IP));
 881         bool qos = ieee80211_is_data_qos(hdr->frame_control);
 882         u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0;
 883
 884         skb_shinfo(skb)->gso_size = num_subframes * mss;
 885         memcpy(cb, skb->cb, sizeof(cb));
 886
 887         next = skb_gso_segment(skb, netdev_flags);
 888         skb_shinfo(skb)->gso_size = mss;
 889         skb_shinfo(skb)->gso_type = ipv4 ? SKB_GSO_TCPV4 : SKB_GSO_TCPV6;
 890         if (WARN_ON_ONCE(IS_ERR(next)))
 891                 return -EINVAL;
 892         else if (next)
 893                 consume_skb(skb);
 894
 895         skb_list_walk_safe(next, tmp, next) {
 896                 memcpy(tmp->cb, cb, sizeof(tmp->cb));
 897                 /*
 898                  * Compute the length of all the data added for the A-MSDU.
 899                  * This will be used to compute the length to write in the TX
 900                  * command. We have: SNAP + IP + TCP for n -1 subframes and
 901                  * ETH header for n subframes.
 902                  */
 903                 tcp_payload_len = skb_tail_pointer(tmp) -
 904                         skb_transport_header(tmp) -
 905                         tcp_hdrlen(tmp) + tmp->data_len;
 906
 907                 if (ipv4)
 908                         ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes);
 909
 910                 if (tcp_payload_len > mss) {
 911                         skb_shinfo(tmp)->gso_size = mss;
 912                         skb_shinfo(tmp)->gso_type = ipv4 ? SKB_GSO_TCPV4 :
 913                                                            SKB_GSO_TCPV6;
 914                 } else {
 915                         if (qos) {
 916                                 u8 *qc;
 917
 918                                 if (ipv4)
 919                                         ip_send_check(ip_hdr(tmp));
 920
 921                                 qc = ieee80211_get_qos_ctl((void *)tmp->data);
 922                                 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
 923                         }
 924                         skb_shinfo(tmp)->gso_size = 0;
 925                 }
 926
 927                 skb_mark_not_on_list(tmp);
 928                 __skb_queue_tail(mpdus_skb, tmp);
 929                 i++;
 930         }
 931
 932         return 0;
 933 }
 934
 935 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
 936                           struct ieee80211_tx_info *info,
 937                           struct ieee80211_sta *sta,
 938                           struct sk_buff_head *mpdus_skb)
 939 {
 940         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 941         struct ieee80211_hdr *hdr = (void *)skb->data;
 942         unsigned int mss = skb_shinfo(skb)->gso_size;
 943         unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len;
 944         u16 snap_ip_tcp, pad;
 945         netdev_features_t netdev_flags = NETIF_F_CSUM_MASK | NETIF_F_SG;
 946         u8 tid;
 947
 948         snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) +
 949                 tcp_hdrlen(skb);
 950
 951         if (!mvmsta->max_amsdu_len ||
 952             !ieee80211_is_data_qos(hdr->frame_control) ||
 953             !mvmsta->amsdu_enabled)
 954                 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
 955
 956         /*
 957          * Do not build AMSDU for IPv6 with extension headers.
 958          * ask stack to segment and checkum the generated MPDUs for us.
 959          */
 960         if (skb->protocol == htons(ETH_P_IPV6) &&
 961             ((struct ipv6hdr *)skb_network_header(skb))->nexthdr !=
 962             IPPROTO_TCP) {
 963                 netdev_flags &= ~NETIF_F_CSUM_MASK;
 964                 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
 965         }
 966
 967         tid = ieee80211_get_tid(hdr);
 968         if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
 969                 return -EINVAL;
 970
 971         /*
 972          * No need to lock amsdu_in_ampdu_allowed since it can't be modified
 973          * during an BA session.
 974          */
 975         if ((info->flags & IEEE80211_TX_CTL_AMPDU &&
 976              !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) ||
 977             !(mvmsta->amsdu_enabled & BIT(tid)))
 978                 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
 979
 980         /*
 981          * Take the min of ieee80211 station and mvm station
 982          */
 983         max_amsdu_len =
 984                 min_t(unsigned int, sta->cur->max_amsdu_len,
 985                       iwl_mvm_max_amsdu_size(mvm, sta, tid));
 986
 987         /*
 988          * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not
 989          * supported. This is a spec requirement (IEEE 802.11-2015
 990          * section 8.7.3 NOTE 3).
 991          */
 992         if (info->flags & IEEE80211_TX_CTL_AMPDU &&
 993             !sta->deflink.vht_cap.vht_supported)
 994                 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095);
 995
 996         /* Sub frame header + SNAP + IP header + TCP header + MSS */
 997         subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss;
 998         pad = (4 - subf_len) & 0x3;
 999
1000         /*
1001          * If we have N subframes in the A-MSDU, then the A-MSDU's size is
1002          * N * subf_len + (N - 1) * pad.
1003          */
1004         num_subframes = (max_amsdu_len + pad) / (subf_len + pad);
1005
1006         if (sta->max_amsdu_subframes &&
1007             num_subframes > sta->max_amsdu_subframes)
1008                 num_subframes = sta->max_amsdu_subframes;
1009
1010         tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
1011                 tcp_hdrlen(skb) + skb->data_len;
1012
1013         /*
1014          * Make sure we have enough TBs for the A-MSDU:
1015          *      2 for each subframe
1016          *      1 more for each fragment
1017          *      1 more for the potential data in the header
1018          */
1019         if ((num_subframes * 2 + skb_shinfo(skb)->nr_frags + 1) >
1020             mvm->trans->max_skb_frags)
1021                 num_subframes = 1;
1022
1023         if (num_subframes > 1)
1024                 *ieee80211_get_qos_ctl(hdr) |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
1025
1026         /* This skb fits in one single A-MSDU */
1027         if (num_subframes * mss >= tcp_payload_len) {
1028                 __skb_queue_tail(mpdus_skb, skb);
1029                 return 0;
1030         }
1031
1032         /*
1033          * Trick the segmentation function to make it
1034          * create SKBs that can fit into one A-MSDU.
1035          */
1036         return iwl_mvm_tx_tso_segment(skb, num_subframes, netdev_flags,
1037                                       mpdus_skb);
1038 }
1039 #else /* CONFIG_INET */
1040 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
1041                           struct ieee80211_tx_info *info,
1042                           struct ieee80211_sta *sta,
1043                           struct sk_buff_head *mpdus_skb)
1044 {
1045         /* Impossible to get TSO with CONFIG_INET */
1046         WARN_ON(1);
1047
1048         return -1;
1049 }
1050 #endif
1051
1052 /* Check if there are any timed-out TIDs on a given shared TXQ */
1053 static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id)
1054 {
1055         unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap;
1056         unsigned long now = jiffies;
1057         int tid;
1058
1059         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1060                 return false;
1061
1062         for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) {
1063                 if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] +
1064                                 IWL_MVM_DQA_QUEUE_TIMEOUT, now))
1065                         return true;
1066         }
1067
1068         return false;
1069 }
1070
1071 static void iwl_mvm_tx_airtime(struct iwl_mvm *mvm,
1072                                struct iwl_mvm_sta *mvmsta,
1073                                int airtime)
1074 {
1075         int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
1076         struct iwl_mvm_tcm_mac *mdata;
1077
1078         if (mac >= NUM_MAC_INDEX_DRIVER)
1079                 return;
1080
1081         mdata = &mvm->tcm.data[mac];
1082
1083         if (mvm->tcm.paused)
1084                 return;
1085
1086         if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD))
1087                 schedule_delayed_work(&mvm->tcm.work, 0);
1088
1089         mdata->tx.airtime += airtime;
1090 }
1091
1092 static int iwl_mvm_tx_pkt_queued(struct iwl_mvm *mvm,
1093                                  struct iwl_mvm_sta *mvmsta, int tid)
1094 {
1095         u32 ac = tid_to_mac80211_ac[tid];
1096         int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
1097         struct iwl_mvm_tcm_mac *mdata;
1098
1099         if (mac >= NUM_MAC_INDEX_DRIVER)
1100                 return -EINVAL;
1101
1102         mdata = &mvm->tcm.data[mac];
1103
1104         mdata->tx.pkts[ac]++;
1105
1106         return 0;
1107 }
1108
1109 /*
1110  * Sets the fields in the Tx cmd that are crypto related.
1111  *
1112  * This function must be called with BHs disabled.
1113  */
1114 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb,
1115                            struct ieee80211_tx_info *info,
1116                            struct ieee80211_sta *sta)
1117 {
1118         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1119         struct iwl_mvm_sta *mvmsta;
1120         struct iwl_device_tx_cmd *dev_cmd;
1121         __le16 fc;
1122         u16 seq_number = 0;
1123         u8 tid = IWL_MAX_TID_COUNT;
1124         u16 txq_id;
1125         bool is_ampdu = false;
1126         int hdrlen;
1127
1128         mvmsta = iwl_mvm_sta_from_mac80211(sta);
1129         fc = hdr->frame_control;
1130         hdrlen = ieee80211_hdrlen(fc);
1131
1132         if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc))
1133                 return -1;
1134
1135         if (WARN_ON_ONCE(!mvmsta))
1136                 return -1;
1137
1138         if (WARN_ON_ONCE(mvmsta->deflink.sta_id == IWL_MVM_INVALID_STA))
1139                 return -1;
1140
1141         if (unlikely(ieee80211_is_any_nullfunc(fc)) && sta->deflink.he_cap.has_he)
1142                 return -1;
1143
1144         if (unlikely(ieee80211_is_probe_resp(fc)))
1145                 iwl_mvm_probe_resp_set_noa(mvm, skb);
1146
1147         dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen,
1148                                         sta, mvmsta->deflink.sta_id);
1149         if (!dev_cmd)
1150                 goto drop;
1151
1152         /*
1153          * we handle that entirely ourselves -- for uAPSD the firmware
1154          * will always send a notification, and for PS-Poll responses
1155          * we'll notify mac80211 when getting frame status
1156          */
1157         info->flags &= ~IEEE80211_TX_STATUS_EOSP;
1158
1159         spin_lock(&mvmsta->lock);
1160
1161         /* nullfunc frames should go to the MGMT queue regardless of QOS,
1162          * the conditions of !ieee80211_is_qos_nullfunc(fc) and
1163          * !ieee80211_is_data_qos(fc) keep the default assignment of MGMT TID
1164          */
1165         if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
1166                 tid = ieee80211_get_tid(hdr);
1167                 if (WARN_ONCE(tid >= IWL_MAX_TID_COUNT, "Invalid TID %d", tid))
1168                         goto drop_unlock_sta;
1169
1170                 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU;
1171                 if (WARN_ONCE(is_ampdu &&
1172                               mvmsta->tid_data[tid].state != IWL_AGG_ON,
1173                               "Invalid internal agg state %d for TID %d",
1174                                mvmsta->tid_data[tid].state, tid))
1175                         goto drop_unlock_sta;
1176
1177                 seq_number = mvmsta->tid_data[tid].seq_number;
1178                 seq_number &= IEEE80211_SCTL_SEQ;
1179
1180                 if (!iwl_mvm_has_new_tx_api(mvm)) {
1181                         struct iwl_tx_cmd *tx_cmd = (void *)dev_cmd->payload;
1182
1183                         hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
1184                         hdr->seq_ctrl |= cpu_to_le16(seq_number);
1185                         /* update the tx_cmd hdr as it was already copied */
1186                         tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl;
1187                 }
1188         } else if (ieee80211_is_data(fc) && !ieee80211_is_data_qos(fc) &&
1189                    !ieee80211_is_nullfunc(fc)) {
1190                 tid = IWL_TID_NON_QOS;
1191         }
1192
1193         txq_id = mvmsta->tid_data[tid].txq_id;
1194
1195         WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
1196
1197         if (WARN_ONCE(txq_id == IWL_MVM_INVALID_QUEUE, "Invalid TXQ id")) {
1198                 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1199                 spin_unlock(&mvmsta->lock);
1200                 return -1;
1201         }
1202
1203         if (!iwl_mvm_has_new_tx_api(mvm)) {
1204                 /* Keep track of the time of the last frame for this RA/TID */
1205                 mvm->queue_info[txq_id].last_frame_time[tid] = jiffies;
1206
1207                 /*
1208                  * If we have timed-out TIDs - schedule the worker that will
1209                  * reconfig the queues and update them
1210                  *
1211                  * Note that the no lock is taken here in order to not serialize
1212                  * the TX flow. This isn't dangerous because scheduling
1213                  * mvm->add_stream_wk can't ruin the state, and if we DON'T
1214                  * schedule it due to some race condition then next TX we get
1215                  * here we will.
1216                  */
1217                 if (unlikely(mvm->queue_info[txq_id].status ==
1218                              IWL_MVM_QUEUE_SHARED &&
1219                              iwl_mvm_txq_should_update(mvm, txq_id)))
1220                         schedule_work(&mvm->add_stream_wk);
1221         }
1222
1223         IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x len %d\n",
1224                      mvmsta->deflink.sta_id, tid, txq_id,
1225                      IEEE80211_SEQ_TO_SN(seq_number), skb->len);
1226
1227         /* From now on, we cannot access info->control */
1228         iwl_mvm_skb_prepare_status(skb, dev_cmd);
1229
1230         /*
1231          * The IV is introduced by the HW for new tx api, and it is not present
1232          * in the skb, hence, don't tell iwl_mvm_mei_tx_copy_to_csme about the
1233          * IV for those devices.
1234          */
1235         if (ieee80211_is_data(fc))
1236                 iwl_mvm_mei_tx_copy_to_csme(mvm, skb,
1237                                             info->control.hw_key &&
1238                                             !iwl_mvm_has_new_tx_api(mvm) ?
1239                                             info->control.hw_key->iv_len : 0);
1240
1241         if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id))
1242                 goto drop_unlock_sta;
1243
1244         if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc))
1245                 mvmsta->tid_data[tid].seq_number = seq_number + 0x10;
1246
1247         spin_unlock(&mvmsta->lock);
1248
1249         if (iwl_mvm_tx_pkt_queued(mvm, mvmsta,
1250                                   tid == IWL_MAX_TID_COUNT ? 0 : tid))
1251                 goto drop;
1252
1253         return 0;
1254
1255 drop_unlock_sta:
1256         iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1257         spin_unlock(&mvmsta->lock);
1258 drop:
1259         IWL_DEBUG_TX(mvm, "TX to [%d|%d] dropped\n", mvmsta->deflink.sta_id,
1260                      tid);
1261         return -1;
1262 }
1263
1264 int iwl_mvm_tx_skb_sta(struct iwl_mvm *mvm, struct sk_buff *skb,
1265                        struct ieee80211_sta *sta)
1266 {
1267         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1268         struct ieee80211_tx_info info;
1269         struct sk_buff_head mpdus_skbs;
1270         unsigned int payload_len;
1271         int ret;
1272         struct sk_buff *orig_skb = skb;
1273
1274         if (WARN_ON_ONCE(!mvmsta))
1275                 return -1;
1276
1277         if (WARN_ON_ONCE(mvmsta->deflink.sta_id == IWL_MVM_INVALID_STA))
1278                 return -1;
1279
1280         memcpy(&info, skb->cb, sizeof(info));
1281
1282         if (!skb_is_gso(skb))
1283                 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1284
1285         payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
1286                 tcp_hdrlen(skb) + skb->data_len;
1287
1288         if (payload_len <= skb_shinfo(skb)->gso_size)
1289                 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1290
1291         __skb_queue_head_init(&mpdus_skbs);
1292
1293         ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs);
1294         if (ret)
1295                 return ret;
1296
1297         WARN_ON(skb_queue_empty(&mpdus_skbs));
1298
1299         while (!skb_queue_empty(&mpdus_skbs)) {
1300                 skb = __skb_dequeue(&mpdus_skbs);
1301
1302                 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1303                 if (ret) {
1304                         /* Free skbs created as part of TSO logic that have not yet been dequeued */
1305                         __skb_queue_purge(&mpdus_skbs);
1306                         /* skb here is not necessarily same as skb that entered this method,
1307                          * so free it explicitly.
1308                          */
1309                         if (skb == orig_skb)
1310                                 ieee80211_free_txskb(mvm->hw, skb);
1311                         else
1312                                 kfree_skb(skb);
1313                         /* there was error, but we consumed skb one way or another, so return 0 */
1314                         return 0;
1315                 }
1316         }
1317
1318         return 0;
1319 }
1320
1321 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm,
1322                                       struct ieee80211_sta *sta, u8 tid)
1323 {
1324         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1325         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1326         struct ieee80211_vif *vif = mvmsta->vif;
1327         u16 normalized_ssn;
1328
1329         lockdep_assert_held(&mvmsta->lock);
1330
1331         if ((tid_data->state == IWL_AGG_ON ||
1332              tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) &&
1333             iwl_mvm_tid_queued(mvm, tid_data) == 0) {
1334                 /*
1335                  * Now that this aggregation or DQA queue is empty tell
1336                  * mac80211 so it knows we no longer have frames buffered for
1337                  * the station on this TID (for the TIM bitmap calculation.)
1338                  */
1339                 ieee80211_sta_set_buffered(sta, tid, false);
1340         }
1341
1342         /*
1343          * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
1344          * to align the wrap around of ssn so we compare relevant values.
1345          */
1346         normalized_ssn = tid_data->ssn;
1347         if (mvm->trans->trans_cfg->gen2)
1348                 normalized_ssn &= 0xff;
1349
1350         if (normalized_ssn != tid_data->next_reclaimed)
1351                 return;
1352
1353         switch (tid_data->state) {
1354         case IWL_EMPTYING_HW_QUEUE_ADDBA:
1355                 IWL_DEBUG_TX_QUEUES(mvm,
1356                                     "Can continue addBA flow ssn = next_recl = %d\n",
1357                                     tid_data->next_reclaimed);
1358                 tid_data->state = IWL_AGG_STARTING;
1359                 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1360                 break;
1361
1362         case IWL_EMPTYING_HW_QUEUE_DELBA:
1363                 IWL_DEBUG_TX_QUEUES(mvm,
1364                                     "Can continue DELBA flow ssn = next_recl = %d\n",
1365                                     tid_data->next_reclaimed);
1366                 tid_data->state = IWL_AGG_OFF;
1367                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1368                 break;
1369
1370         default:
1371                 break;
1372         }
1373 }
1374
1375 #ifdef CONFIG_IWLWIFI_DEBUG
1376 const char *iwl_mvm_get_tx_fail_reason(u32 status)
1377 {
1378 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
1379 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
1380
1381         switch (status & TX_STATUS_MSK) {
1382         case TX_STATUS_SUCCESS:
1383                 return "SUCCESS";
1384         TX_STATUS_POSTPONE(DELAY);
1385         TX_STATUS_POSTPONE(FEW_BYTES);
1386         TX_STATUS_POSTPONE(BT_PRIO);
1387         TX_STATUS_POSTPONE(QUIET_PERIOD);
1388         TX_STATUS_POSTPONE(CALC_TTAK);
1389         TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
1390         TX_STATUS_FAIL(SHORT_LIMIT);
1391         TX_STATUS_FAIL(LONG_LIMIT);
1392         TX_STATUS_FAIL(UNDERRUN);
1393         TX_STATUS_FAIL(DRAIN_FLOW);
1394         TX_STATUS_FAIL(RFKILL_FLUSH);
1395         TX_STATUS_FAIL(LIFE_EXPIRE);
1396         TX_STATUS_FAIL(DEST_PS);
1397         TX_STATUS_FAIL(HOST_ABORTED);
1398         TX_STATUS_FAIL(BT_RETRY);
1399         TX_STATUS_FAIL(STA_INVALID);
1400         TX_STATUS_FAIL(FRAG_DROPPED);
1401         TX_STATUS_FAIL(TID_DISABLE);
1402         TX_STATUS_FAIL(FIFO_FLUSHED);
1403         TX_STATUS_FAIL(SMALL_CF_POLL);
1404         TX_STATUS_FAIL(FW_DROP);
1405         TX_STATUS_FAIL(STA_COLOR_MISMATCH);
1406         }
1407
1408         return "UNKNOWN";
1409
1410 #undef TX_STATUS_FAIL
1411 #undef TX_STATUS_POSTPONE
1412 }
1413 #endif /* CONFIG_IWLWIFI_DEBUG */
1414
1415 static int iwl_mvm_get_hwrate_chan_width(u32 chan_width)
1416 {
1417         switch (chan_width) {
1418         case RATE_MCS_CHAN_WIDTH_20:
1419                 return 0;
1420         case RATE_MCS_CHAN_WIDTH_40:
1421                 return IEEE80211_TX_RC_40_MHZ_WIDTH;
1422         case RATE_MCS_CHAN_WIDTH_80:
1423                 return IEEE80211_TX_RC_80_MHZ_WIDTH;
1424         case RATE_MCS_CHAN_WIDTH_160:
1425                 return IEEE80211_TX_RC_160_MHZ_WIDTH;
1426         default:
1427                 return 0;
1428         }
1429 }
1430
1431 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags,
1432                                enum nl80211_band band,
1433                                struct ieee80211_tx_rate *r)
1434 {
1435         u32 format = rate_n_flags & RATE_MCS_MOD_TYPE_MSK;
1436         u32 rate = format == RATE_MCS_HT_MSK ?
1437                 RATE_HT_MCS_INDEX(rate_n_flags) :
1438                 rate_n_flags & RATE_MCS_CODE_MSK;
1439
1440         r->flags |=
1441                 iwl_mvm_get_hwrate_chan_width(rate_n_flags &
1442                                               RATE_MCS_CHAN_WIDTH_MSK);
1443
1444         if (rate_n_flags & RATE_MCS_SGI_MSK)
1445                 r->flags |= IEEE80211_TX_RC_SHORT_GI;
1446         if (format ==  RATE_MCS_HT_MSK) {
1447                 r->flags |= IEEE80211_TX_RC_MCS;
1448                 r->idx = rate;
1449         } else if (format ==  RATE_MCS_VHT_MSK) {
1450                 ieee80211_rate_set_vht(r, rate,
1451                                        FIELD_GET(RATE_MCS_NSS_MSK,
1452                                                  rate_n_flags) + 1);
1453                 r->flags |= IEEE80211_TX_RC_VHT_MCS;
1454         } else if (format == RATE_MCS_HE_MSK) {
1455                 /* mac80211 cannot do this without ieee80211_tx_status_ext()
1456                  * but it only matters for radiotap */
1457                 r->idx = 0;
1458         } else {
1459                 r->idx = iwl_mvm_legacy_hw_idx_to_mac80211_idx(rate_n_flags,
1460                                                                band);
1461         }
1462 }
1463
1464 void iwl_mvm_hwrate_to_tx_rate_v1(u32 rate_n_flags,
1465                                   enum nl80211_band band,
1466                                   struct ieee80211_tx_rate *r)
1467 {
1468         if (rate_n_flags & RATE_HT_MCS_GF_MSK)
1469                 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
1470
1471         r->flags |=
1472                 iwl_mvm_get_hwrate_chan_width(rate_n_flags &
1473                                               RATE_MCS_CHAN_WIDTH_MSK_V1);
1474
1475         if (rate_n_flags & RATE_MCS_SGI_MSK_V1)
1476                 r->flags |= IEEE80211_TX_RC_SHORT_GI;
1477         if (rate_n_flags & RATE_MCS_HT_MSK_V1) {
1478                 r->flags |= IEEE80211_TX_RC_MCS;
1479                 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK_V1;
1480         } else if (rate_n_flags & RATE_MCS_VHT_MSK_V1) {
1481                 ieee80211_rate_set_vht(
1482                         r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK,
1483                         FIELD_GET(RATE_MCS_NSS_MSK, rate_n_flags) + 1);
1484                 r->flags |= IEEE80211_TX_RC_VHT_MCS;
1485         } else {
1486                 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
1487                                                              band);
1488         }
1489 }
1490
1491 /*
1492  * translate ucode response to mac80211 tx status control values
1493  */
1494 static void iwl_mvm_hwrate_to_tx_status(const struct iwl_fw *fw,
1495                                         u32 rate_n_flags,
1496                                         struct ieee80211_tx_info *info)
1497 {
1498         struct ieee80211_tx_rate *r = &info->status.rates[0];
1499
1500         if (iwl_fw_lookup_notif_ver(fw, LONG_GROUP,
1501                                     TX_CMD, 0) <= 6)
1502                 rate_n_flags = iwl_new_rate_from_v1(rate_n_flags);
1503
1504         info->status.antenna =
1505                 ((rate_n_flags & RATE_MCS_ANT_AB_MSK) >> RATE_MCS_ANT_POS);
1506         iwl_mvm_hwrate_to_tx_rate(rate_n_flags,
1507                                   info->band, r);
1508 }
1509
1510 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm,
1511                                             u32 status, __le16 frame_control)
1512 {
1513         struct iwl_fw_dbg_trigger_tlv *trig;
1514         struct iwl_fw_dbg_trigger_tx_status *status_trig;
1515         int i;
1516
1517         if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS) {
1518                 enum iwl_fw_ini_time_point tp =
1519                         IWL_FW_INI_TIME_POINT_TX_FAILED;
1520
1521                 if (ieee80211_is_action(frame_control))
1522                         tp = IWL_FW_INI_TIME_POINT_TX_WFD_ACTION_FRAME_FAILED;
1523
1524                 iwl_dbg_tlv_time_point(&mvm->fwrt,
1525                                        tp, NULL);
1526                 return;
1527         }
1528
1529         trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL,
1530                                      FW_DBG_TRIGGER_TX_STATUS);
1531         if (!trig)
1532                 return;
1533
1534         status_trig = (void *)trig->data;
1535
1536         for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) {
1537                 /* don't collect on status 0 */
1538                 if (!status_trig->statuses[i].status)
1539                         break;
1540
1541                 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK))
1542                         continue;
1543
1544                 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
1545                                         "Tx status %d was received",
1546                                         status & TX_STATUS_MSK);
1547                 break;
1548         }
1549 }
1550
1551 /*
1552  * iwl_mvm_get_scd_ssn - returns the SSN of the SCD
1553  * @tx_resp: the Tx response from the fw (agg or non-agg)
1554  *
1555  * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since
1556  * it can't know that everything will go well until the end of the AMPDU, it
1557  * can't know in advance the number of MPDUs that will be sent in the current
1558  * batch. This is why it writes the agg Tx response while it fetches the MPDUs.
1559  * Hence, it can't know in advance what the SSN of the SCD will be at the end
1560  * of the batch. This is why the SSN of the SCD is written at the end of the
1561  * whole struct at a variable offset. This function knows how to cope with the
1562  * variable offset and returns the SSN of the SCD.
1563  */
1564 static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm,
1565                                       struct iwl_mvm_tx_resp *tx_resp)
1566 {
1567         return le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) +
1568                             tx_resp->frame_count) & 0xfff;
1569 }
1570
1571 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm,
1572                                      struct iwl_rx_packet *pkt)
1573 {
1574         struct ieee80211_sta *sta;
1575         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1576         int txq_id = SEQ_TO_QUEUE(sequence);
1577         /* struct iwl_mvm_tx_resp_v3 is almost the same */
1578         struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1579         int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1580         int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1581         struct agg_tx_status *agg_status =
1582                 iwl_mvm_get_agg_status(mvm, tx_resp);
1583         u32 status = le16_to_cpu(agg_status->status);
1584         u16 ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp);
1585         struct sk_buff_head skbs;
1586         u8 skb_freed = 0;
1587         u8 lq_color;
1588         u16 next_reclaimed, seq_ctl;
1589         bool is_ndp = false;
1590
1591         __skb_queue_head_init(&skbs);
1592
1593         if (iwl_mvm_has_new_tx_api(mvm))
1594                 txq_id = le16_to_cpu(tx_resp->tx_queue);
1595
1596         seq_ctl = le16_to_cpu(tx_resp->seq_ctl);
1597
1598         /* we can free until ssn % q.n_bd not inclusive */
1599         iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs);
1600
1601         while (!skb_queue_empty(&skbs)) {
1602                 struct sk_buff *skb = __skb_dequeue(&skbs);
1603                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1604                 struct ieee80211_hdr *hdr = (void *)skb->data;
1605                 bool flushed = false;
1606
1607                 skb_freed++;
1608
1609                 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1610
1611                 memset(&info->status, 0, sizeof(info->status));
1612
1613                 /* inform mac80211 about what happened with the frame */
1614                 switch (status & TX_STATUS_MSK) {
1615                 case TX_STATUS_SUCCESS:
1616                 case TX_STATUS_DIRECT_DONE:
1617                         info->flags |= IEEE80211_TX_STAT_ACK;
1618                         break;
1619                 case TX_STATUS_FAIL_FIFO_FLUSHED:
1620                 case TX_STATUS_FAIL_DRAIN_FLOW:
1621                         flushed = true;
1622                         break;
1623                 case TX_STATUS_FAIL_DEST_PS:
1624                         /* the FW should have stopped the queue and not
1625                          * return this status
1626                          */
1627                         IWL_ERR_LIMIT(mvm,
1628                                       "FW reported TX filtered, status=0x%x, FC=0x%x\n",
1629                                       status, le16_to_cpu(hdr->frame_control));
1630                         info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
1631                         break;
1632                 default:
1633                         break;
1634                 }
1635
1636                 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS &&
1637                     ieee80211_is_mgmt(hdr->frame_control))
1638                         iwl_mvm_toggle_tx_ant(mvm, &mvm->mgmt_last_antenna_idx);
1639
1640                 /*
1641                  * If we are freeing multiple frames, mark all the frames
1642                  * but the first one as acked, since they were acknowledged
1643                  * before
1644                  * */
1645                 if (skb_freed > 1)
1646                         info->flags |= IEEE80211_TX_STAT_ACK;
1647
1648                 iwl_mvm_tx_status_check_trigger(mvm, status, hdr->frame_control);
1649
1650                 info->status.rates[0].count = tx_resp->failure_frame + 1;
1651
1652                 iwl_mvm_hwrate_to_tx_status(mvm->fw,
1653                                             le32_to_cpu(tx_resp->initial_rate),
1654                                             info);
1655
1656                 /* Don't assign the converted initial_rate, because driver
1657                  * TLC uses this and doesn't support the new FW rate
1658                  */
1659                 info->status.status_driver_data[1] =
1660                         (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate);
1661
1662                 /* Single frame failure in an AMPDU queue => send BAR */
1663                 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
1664                     !(info->flags & IEEE80211_TX_STAT_ACK) &&
1665                     !(info->flags & IEEE80211_TX_STAT_TX_FILTERED) && !flushed)
1666                         info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1667                 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1668
1669                 /* W/A FW bug: seq_ctl is wrong upon failure / BAR frame */
1670                 if (ieee80211_is_back_req(hdr->frame_control))
1671                         seq_ctl = 0;
1672                 else if (status != TX_STATUS_SUCCESS)
1673                         seq_ctl = le16_to_cpu(hdr->seq_ctrl);
1674
1675                 if (unlikely(!seq_ctl)) {
1676                         /*
1677                          * If it is an NDP, we can't update next_reclaim since
1678                          * its sequence control is 0. Note that for that same
1679                          * reason, NDPs are never sent to A-MPDU'able queues
1680                          * so that we can never have more than one freed frame
1681                          * for a single Tx resonse (see WARN_ON below).
1682                          */
1683                         if (ieee80211_is_qos_nullfunc(hdr->frame_control))
1684                                 is_ndp = true;
1685                 }
1686
1687                 /*
1688                  * TODO: this is not accurate if we are freeing more than one
1689                  * packet.
1690                  */
1691                 info->status.tx_time =
1692                         le16_to_cpu(tx_resp->wireless_media_time);
1693                 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1);
1694                 lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info);
1695                 info->status.status_driver_data[0] =
1696                         RS_DRV_DATA_PACK(lq_color, tx_resp->reduced_tpc);
1697
1698                 if (likely(!iwl_mvm_time_sync_frame(mvm, skb, hdr->addr1)))
1699                         ieee80211_tx_status(mvm->hw, skb);
1700         }
1701
1702         /* This is an aggregation queue or might become one, so we use
1703          * the ssn since: ssn = wifi seq_num % 256.
1704          * The seq_ctl is the sequence control of the packet to which
1705          * this Tx response relates. But if there is a hole in the
1706          * bitmap of the BA we received, this Tx response may allow to
1707          * reclaim the hole and all the subsequent packets that were
1708          * already acked. In that case, seq_ctl != ssn, and the next
1709          * packet to be reclaimed will be ssn and not seq_ctl. In that
1710          * case, several packets will be reclaimed even if
1711          * frame_count = 1.
1712          *
1713          * The ssn is the index (% 256) of the latest packet that has
1714          * treated (acked / dropped) + 1.
1715          */
1716         next_reclaimed = ssn;
1717
1718         IWL_DEBUG_TX_REPLY(mvm,
1719                            "TXQ %d status %s (0x%08x)\n",
1720                            txq_id, iwl_mvm_get_tx_fail_reason(status), status);
1721
1722         IWL_DEBUG_TX_REPLY(mvm,
1723                            "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
1724                            le32_to_cpu(tx_resp->initial_rate),
1725                            tx_resp->failure_frame, SEQ_TO_INDEX(sequence),
1726                            ssn, next_reclaimed, seq_ctl);
1727
1728         rcu_read_lock();
1729
1730         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1731         /*
1732          * sta can't be NULL otherwise it'd mean that the sta has been freed in
1733          * the firmware while we still have packets for it in the Tx queues.
1734          */
1735         if (WARN_ON_ONCE(!sta))
1736                 goto out;
1737
1738         if (!IS_ERR(sta)) {
1739                 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1740
1741                 iwl_mvm_tx_airtime(mvm, mvmsta,
1742                                    le16_to_cpu(tx_resp->wireless_media_time));
1743
1744                 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS &&
1745                     mvmsta->sta_state < IEEE80211_STA_AUTHORIZED)
1746                         iwl_mvm_toggle_tx_ant(mvm, &mvmsta->tx_ant);
1747
1748                 if (sta->wme && tid != IWL_MGMT_TID) {
1749                         struct iwl_mvm_tid_data *tid_data =
1750                                 &mvmsta->tid_data[tid];
1751                         bool send_eosp_ndp = false;
1752
1753                         spin_lock_bh(&mvmsta->lock);
1754
1755                         if (!is_ndp) {
1756                                 tid_data->next_reclaimed = next_reclaimed;
1757                                 IWL_DEBUG_TX_REPLY(mvm,
1758                                                    "Next reclaimed packet:%d\n",
1759                                                    next_reclaimed);
1760                         } else {
1761                                 IWL_DEBUG_TX_REPLY(mvm,
1762                                                    "NDP - don't update next_reclaimed\n");
1763                         }
1764
1765                         iwl_mvm_check_ratid_empty(mvm, sta, tid);
1766
1767                         if (mvmsta->sleep_tx_count) {
1768                                 mvmsta->sleep_tx_count--;
1769                                 if (mvmsta->sleep_tx_count &&
1770                                     !iwl_mvm_tid_queued(mvm, tid_data)) {
1771                                         /*
1772                                          * The number of frames in the queue
1773                                          * dropped to 0 even if we sent less
1774                                          * frames than we thought we had on the
1775                                          * Tx queue.
1776                                          * This means we had holes in the BA
1777                                          * window that we just filled, ask
1778                                          * mac80211 to send EOSP since the
1779                                          * firmware won't know how to do that.
1780                                          * Send NDP and the firmware will send
1781                                          * EOSP notification that will trigger
1782                                          * a call to ieee80211_sta_eosp().
1783                                          */
1784                                         send_eosp_ndp = true;
1785                                 }
1786                         }
1787
1788                         spin_unlock_bh(&mvmsta->lock);
1789                         if (send_eosp_ndp) {
1790                                 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta,
1791                                         IEEE80211_FRAME_RELEASE_UAPSD,
1792                                         1, tid, false, false);
1793                                 mvmsta->sleep_tx_count = 0;
1794                                 ieee80211_send_eosp_nullfunc(sta, tid);
1795                         }
1796                 }
1797
1798                 if (mvmsta->next_status_eosp) {
1799                         mvmsta->next_status_eosp = false;
1800                         ieee80211_sta_eosp(sta);
1801                 }
1802         }
1803 out:
1804         rcu_read_unlock();
1805 }
1806
1807 #ifdef CONFIG_IWLWIFI_DEBUG
1808 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
1809 static const char *iwl_get_agg_tx_status(u16 status)
1810 {
1811         switch (status & AGG_TX_STATE_STATUS_MSK) {
1812         AGG_TX_STATE_(TRANSMITTED);
1813         AGG_TX_STATE_(UNDERRUN);
1814         AGG_TX_STATE_(BT_PRIO);
1815         AGG_TX_STATE_(FEW_BYTES);
1816         AGG_TX_STATE_(ABORT);
1817         AGG_TX_STATE_(TX_ON_AIR_DROP);
1818         AGG_TX_STATE_(LAST_SENT_TRY_CNT);
1819         AGG_TX_STATE_(LAST_SENT_BT_KILL);
1820         AGG_TX_STATE_(SCD_QUERY);
1821         AGG_TX_STATE_(TEST_BAD_CRC32);
1822         AGG_TX_STATE_(RESPONSE);
1823         AGG_TX_STATE_(DUMP_TX);
1824         AGG_TX_STATE_(DELAY_TX);
1825         }
1826
1827         return "UNKNOWN";
1828 }
1829
1830 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1831                                       struct iwl_rx_packet *pkt)
1832 {
1833         struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1834         struct agg_tx_status *frame_status =
1835                 iwl_mvm_get_agg_status(mvm, tx_resp);
1836         int i;
1837         bool tirgger_timepoint = false;
1838
1839         for (i = 0; i < tx_resp->frame_count; i++) {
1840                 u16 fstatus = le16_to_cpu(frame_status[i].status);
1841                 /* In case one frame wasn't transmitted trigger time point */
1842                 tirgger_timepoint |= ((fstatus & AGG_TX_STATE_STATUS_MSK) !=
1843                                       AGG_TX_STATE_TRANSMITTED);
1844                 IWL_DEBUG_TX_REPLY(mvm,
1845                                    "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
1846                                    iwl_get_agg_tx_status(fstatus),
1847                                    fstatus & AGG_TX_STATE_STATUS_MSK,
1848                                    (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >>
1849                                         AGG_TX_STATE_TRY_CNT_POS,
1850                                    le16_to_cpu(frame_status[i].sequence));
1851         }
1852
1853         if (tirgger_timepoint)
1854                 iwl_dbg_tlv_time_point(&mvm->fwrt,
1855                                        IWL_FW_INI_TIME_POINT_TX_FAILED, NULL);
1856
1857 }
1858 #else
1859 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1860                                       struct iwl_rx_packet *pkt)
1861 {}
1862 #endif /* CONFIG_IWLWIFI_DEBUG */
1863
1864 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm,
1865                                   struct iwl_rx_packet *pkt)
1866 {
1867         struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1868         int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1869         int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1870         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1871         struct iwl_mvm_sta *mvmsta;
1872         int queue = SEQ_TO_QUEUE(sequence);
1873         struct ieee80211_sta *sta;
1874
1875         if (WARN_ON_ONCE(queue < IWL_MVM_DQA_MIN_DATA_QUEUE &&
1876                          (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)))
1877                 return;
1878
1879         iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt);
1880
1881         rcu_read_lock();
1882
1883         mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1884
1885         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1886         if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta) || !sta->wme)) {
1887                 rcu_read_unlock();
1888                 return;
1889         }
1890
1891         if (!WARN_ON_ONCE(!mvmsta)) {
1892                 mvmsta->tid_data[tid].rate_n_flags =
1893                         le32_to_cpu(tx_resp->initial_rate);
1894                 mvmsta->tid_data[tid].tx_time =
1895                         le16_to_cpu(tx_resp->wireless_media_time);
1896                 mvmsta->tid_data[tid].lq_color =
1897                         TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info);
1898                 iwl_mvm_tx_airtime(mvm, mvmsta,
1899                                    le16_to_cpu(tx_resp->wireless_media_time));
1900         }
1901
1902         rcu_read_unlock();
1903 }
1904
1905 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1906 {
1907         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1908         struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1909
1910         if (tx_resp->frame_count == 1)
1911                 iwl_mvm_rx_tx_cmd_single(mvm, pkt);
1912         else
1913                 iwl_mvm_rx_tx_cmd_agg(mvm, pkt);
1914 }
1915
1916 static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid,
1917                                int txq, int index,
1918                                struct ieee80211_tx_info *tx_info, u32 rate,
1919                                bool is_flush)
1920 {
1921         struct sk_buff_head reclaimed_skbs;
1922         struct iwl_mvm_tid_data *tid_data = NULL;
1923         struct ieee80211_sta *sta;
1924         struct iwl_mvm_sta *mvmsta = NULL;
1925         struct sk_buff *skb;
1926         int freed;
1927
1928         if (WARN_ONCE(sta_id >= mvm->fw->ucode_capa.num_stations ||
1929                       tid > IWL_MAX_TID_COUNT,
1930                       "sta_id %d tid %d", sta_id, tid))
1931                 return;
1932
1933         rcu_read_lock();
1934
1935         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1936
1937         /* Reclaiming frames for a station that has been deleted ? */
1938         if (WARN_ON_ONCE(!sta)) {
1939                 rcu_read_unlock();
1940                 return;
1941         }
1942
1943         __skb_queue_head_init(&reclaimed_skbs);
1944
1945         /*
1946          * Release all TFDs before the SSN, i.e. all TFDs in front of
1947          * block-ack window (we assume that they've been successfully
1948          * transmitted ... if not, it's too late anyway).
1949          */
1950         iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs);
1951
1952         skb_queue_walk(&reclaimed_skbs, skb) {
1953                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1954
1955                 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1956
1957                 memset(&info->status, 0, sizeof(info->status));
1958                 /* Packet was transmitted successfully, failures come as single
1959                  * frames because before failing a frame the firmware transmits
1960                  * it without aggregation at least once.
1961                  */
1962                 if (!is_flush)
1963                         info->flags |= IEEE80211_TX_STAT_ACK;
1964         }
1965
1966         /*
1967          * It's possible to get a BA response after invalidating the rcu (rcu is
1968          * invalidated in order to prevent new Tx from being sent, but there may
1969          * be some frames already in-flight).
1970          * In this case we just want to reclaim, and could skip all the
1971          * sta-dependent stuff since it's in the middle of being removed
1972          * anyways.
1973          */
1974         if (IS_ERR(sta))
1975                 goto out;
1976
1977         mvmsta = iwl_mvm_sta_from_mac80211(sta);
1978         tid_data = &mvmsta->tid_data[tid];
1979
1980         if (tid_data->txq_id != txq) {
1981                 IWL_ERR(mvm,
1982                         "invalid reclaim request: Q %d, tid %d\n",
1983                         tid_data->txq_id, tid);
1984                 rcu_read_unlock();
1985                 return;
1986         }
1987
1988         spin_lock_bh(&mvmsta->lock);
1989
1990         tid_data->next_reclaimed = index;
1991
1992         iwl_mvm_check_ratid_empty(mvm, sta, tid);
1993
1994         freed = 0;
1995
1996         /* pack lq color from tid_data along the reduced txp */
1997         tx_info->status.status_driver_data[0] =
1998                 RS_DRV_DATA_PACK(tid_data->lq_color,
1999                                  tx_info->status.status_driver_data[0]);
2000         tx_info->status.status_driver_data[1] = (void *)(uintptr_t)rate;
2001
2002         skb_queue_walk(&reclaimed_skbs, skb) {
2003                 struct ieee80211_hdr *hdr = (void *)skb->data;
2004                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2005
2006                 if (!is_flush) {
2007                         if (ieee80211_is_data_qos(hdr->frame_control))
2008                                 freed++;
2009                         else
2010                                 WARN_ON_ONCE(tid != IWL_MAX_TID_COUNT);
2011                 }
2012
2013                 /* this is the first skb we deliver in this batch */
2014                 /* put the rate scaling data there */
2015                 if (freed == 1) {
2016                         info->flags |= IEEE80211_TX_STAT_AMPDU;
2017                         memcpy(&info->status, &tx_info->status,
2018                                sizeof(tx_info->status));
2019                         iwl_mvm_hwrate_to_tx_status(mvm->fw, rate, info);
2020                 }
2021         }
2022
2023         spin_unlock_bh(&mvmsta->lock);
2024
2025         /* We got a BA notif with 0 acked or scd_ssn didn't progress which is
2026          * possible (i.e. first MPDU in the aggregation wasn't acked)
2027          * Still it's important to update RS about sent vs. acked.
2028          */
2029         if (!is_flush && skb_queue_empty(&reclaimed_skbs) &&
2030             !iwl_mvm_has_tlc_offload(mvm)) {
2031                 struct ieee80211_chanctx_conf *chanctx_conf = NULL;
2032
2033                 /* no TLC offload, so non-MLD mode */
2034                 if (mvmsta->vif)
2035                         chanctx_conf =
2036                                 rcu_dereference(mvmsta->vif->bss_conf.chanctx_conf);
2037
2038                 if (WARN_ON_ONCE(!chanctx_conf))
2039                         goto out;
2040
2041                 tx_info->band = chanctx_conf->def.chan->band;
2042                 iwl_mvm_hwrate_to_tx_status(mvm->fw, rate, tx_info);
2043
2044                 IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n");
2045                 iwl_mvm_rs_tx_status(mvm, sta, tid, tx_info, false);
2046         }
2047
2048 out:
2049         rcu_read_unlock();
2050
2051         while (!skb_queue_empty(&reclaimed_skbs)) {
2052                 skb = __skb_dequeue(&reclaimed_skbs);
2053                 ieee80211_tx_status(mvm->hw, skb);
2054         }
2055 }
2056
2057 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
2058 {
2059         struct iwl_rx_packet *pkt = rxb_addr(rxb);
2060         unsigned int pkt_len = iwl_rx_packet_payload_len(pkt);
2061         int sta_id, tid, txq, index;
2062         struct ieee80211_tx_info ba_info = {};
2063         struct iwl_mvm_ba_notif *ba_notif;
2064         struct iwl_mvm_tid_data *tid_data;
2065         struct iwl_mvm_sta *mvmsta;
2066
2067         ba_info.flags = IEEE80211_TX_STAT_AMPDU;
2068
2069         if (iwl_mvm_has_new_tx_api(mvm)) {
2070                 struct iwl_mvm_compressed_ba_notif *ba_res =
2071                         (void *)pkt->data;
2072                 u8 lq_color = TX_RES_RATE_TABLE_COL_GET(ba_res->tlc_rate_info);
2073                 u16 tfd_cnt;
2074                 int i;
2075
2076                 if (unlikely(sizeof(*ba_res) > pkt_len))
2077                         return;
2078
2079                 sta_id = ba_res->sta_id;
2080                 ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done);
2081                 ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed);
2082                 ba_info.status.tx_time =
2083                         (u16)le32_to_cpu(ba_res->wireless_time);
2084                 ba_info.status.status_driver_data[0] =
2085                         (void *)(uintptr_t)ba_res->reduced_txp;
2086
2087                 tfd_cnt = le16_to_cpu(ba_res->tfd_cnt);
2088                 if (!tfd_cnt || struct_size(ba_res, tfd, tfd_cnt) > pkt_len)
2089                         return;
2090
2091                 rcu_read_lock();
2092
2093                 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
2094                 /*
2095                  * It's possible to get a BA response after invalidating the rcu
2096                  * (rcu is invalidated in order to prevent new Tx from being
2097                  * sent, but there may be some frames already in-flight).
2098                  * In this case we just want to reclaim, and could skip all the
2099                  * sta-dependent stuff since it's in the middle of being removed
2100                  * anyways.
2101                  */
2102
2103                 /* Free per TID */
2104                 for (i = 0; i < tfd_cnt; i++) {
2105                         struct iwl_mvm_compressed_ba_tfd *ba_tfd =
2106                                 &ba_res->tfd[i];
2107
2108                         tid = ba_tfd->tid;
2109                         if (tid == IWL_MGMT_TID)
2110                                 tid = IWL_MAX_TID_COUNT;
2111
2112                         if (mvmsta)
2113                                 mvmsta->tid_data[i].lq_color = lq_color;
2114
2115                         iwl_mvm_tx_reclaim(mvm, sta_id, tid,
2116                                            (int)(le16_to_cpu(ba_tfd->q_num)),
2117                                            le16_to_cpu(ba_tfd->tfd_index),
2118                                            &ba_info,
2119                                            le32_to_cpu(ba_res->tx_rate), false);
2120                 }
2121
2122                 if (mvmsta)
2123                         iwl_mvm_tx_airtime(mvm, mvmsta,
2124                                            le32_to_cpu(ba_res->wireless_time));
2125                 rcu_read_unlock();
2126
2127                 IWL_DEBUG_TX_REPLY(mvm,
2128                                    "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n",
2129                                    sta_id, le32_to_cpu(ba_res->flags),
2130                                    le16_to_cpu(ba_res->txed),
2131                                    le16_to_cpu(ba_res->done));
2132                 return;
2133         }
2134
2135         ba_notif = (void *)pkt->data;
2136         sta_id = ba_notif->sta_id;
2137         tid = ba_notif->tid;
2138         /* "flow" corresponds to Tx queue */
2139         txq = le16_to_cpu(ba_notif->scd_flow);
2140         /* "ssn" is start of block-ack Tx window, corresponds to index
2141          * (in Tx queue's circular buffer) of first TFD/frame in window */
2142         index = le16_to_cpu(ba_notif->scd_ssn);
2143
2144         rcu_read_lock();
2145         mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
2146         if (WARN_ON_ONCE(!mvmsta)) {
2147                 rcu_read_unlock();
2148                 return;
2149         }
2150
2151         tid_data = &mvmsta->tid_data[tid];
2152
2153         ba_info.status.ampdu_ack_len = ba_notif->txed_2_done;
2154         ba_info.status.ampdu_len = ba_notif->txed;
2155         ba_info.status.tx_time = tid_data->tx_time;
2156         ba_info.status.status_driver_data[0] =
2157                 (void *)(uintptr_t)ba_notif->reduced_txp;
2158
2159         rcu_read_unlock();
2160
2161         iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info,
2162                            tid_data->rate_n_flags, false);
2163
2164         IWL_DEBUG_TX_REPLY(mvm,
2165                            "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
2166                            ba_notif->sta_addr, ba_notif->sta_id);
2167
2168         IWL_DEBUG_TX_REPLY(mvm,
2169                            "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
2170                            ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl),
2171                            le64_to_cpu(ba_notif->bitmap), txq, index,
2172                            ba_notif->txed, ba_notif->txed_2_done);
2173
2174         IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n",
2175                            ba_notif->reduced_txp);
2176 }
2177
2178 /*
2179  * Note that there are transports that buffer frames before they reach
2180  * the firmware. This means that after flush_tx_path is called, the
2181  * queue might not be empty. The race-free way to handle this is to:
2182  * 1) set the station as draining
2183  * 2) flush the Tx path
2184  * 3) wait for the transport queues to be empty
2185  */
2186 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk)
2187 {
2188         int ret;
2189         struct iwl_tx_path_flush_cmd_v1 flush_cmd = {
2190                 .queues_ctl = cpu_to_le32(tfd_msk),
2191                 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH),
2192         };
2193
2194         WARN_ON(iwl_mvm_has_new_tx_api(mvm));
2195         ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, 0,
2196                                    sizeof(flush_cmd), &flush_cmd);
2197         if (ret)
2198                 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
2199         return ret;
2200 }
2201
2202 int iwl_mvm_flush_sta_tids(struct iwl_mvm *mvm, u32 sta_id, u16 tids)
2203 {
2204         int ret;
2205         struct iwl_tx_path_flush_cmd_rsp *rsp;
2206         struct iwl_tx_path_flush_cmd flush_cmd = {
2207                 .sta_id = cpu_to_le32(sta_id),
2208                 .tid_mask = cpu_to_le16(tids),
2209         };
2210
2211         struct iwl_host_cmd cmd = {
2212                 .id = TXPATH_FLUSH,
2213                 .len = { sizeof(flush_cmd), },
2214                 .data = { &flush_cmd, },
2215         };
2216
2217         WARN_ON(!iwl_mvm_has_new_tx_api(mvm));
2218
2219         if (iwl_fw_lookup_notif_ver(mvm->fw, LONG_GROUP, TXPATH_FLUSH, 0) > 0)
2220                 cmd.flags |= CMD_WANT_SKB;
2221
2222         IWL_DEBUG_TX_QUEUES(mvm, "flush for sta id %d tid mask 0x%x\n",
2223                             sta_id, tids);
2224
2225         ret = iwl_mvm_send_cmd(mvm, &cmd);
2226
2227         if (ret) {
2228                 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
2229                 return ret;
2230         }
2231
2232         if (cmd.flags & CMD_WANT_SKB) {
2233                 int i;
2234                 int num_flushed_queues;
2235
2236                 if (WARN_ON_ONCE(iwl_rx_packet_payload_len(cmd.resp_pkt) != sizeof(*rsp))) {
2237                         ret = -EIO;
2238                         goto free_rsp;
2239                 }
2240
2241                 rsp = (void *)cmd.resp_pkt->data;
2242
2243                 if (WARN_ONCE(le16_to_cpu(rsp->sta_id) != sta_id,
2244                               "sta_id %d != rsp_sta_id %d",
2245                               sta_id, le16_to_cpu(rsp->sta_id))) {
2246                         ret = -EIO;
2247                         goto free_rsp;
2248                 }
2249
2250                 num_flushed_queues = le16_to_cpu(rsp->num_flushed_queues);
2251                 if (WARN_ONCE(num_flushed_queues > IWL_TX_FLUSH_QUEUE_RSP,
2252                               "num_flushed_queues %d", num_flushed_queues)) {
2253                         ret = -EIO;
2254                         goto free_rsp;
2255                 }
2256
2257                 for (i = 0; i < num_flushed_queues; i++) {
2258                         struct ieee80211_tx_info tx_info = {};
2259                         struct iwl_flush_queue_info *queue_info = &rsp->queues[i];
2260                         int tid = le16_to_cpu(queue_info->tid);
2261                         int read_before = le16_to_cpu(queue_info->read_before_flush);
2262                         int read_after = le16_to_cpu(queue_info->read_after_flush);
2263                         int queue_num = le16_to_cpu(queue_info->queue_num);
2264
2265                         if (tid == IWL_MGMT_TID)
2266                                 tid = IWL_MAX_TID_COUNT;
2267
2268                         IWL_DEBUG_TX_QUEUES(mvm,
2269                                             "tid %d queue_id %d read-before %d read-after %d\n",
2270                                             tid, queue_num, read_before, read_after);
2271
2272                         iwl_mvm_tx_reclaim(mvm, sta_id, tid, queue_num, read_after,
2273                                            &tx_info, 0, true);
2274                 }
2275 free_rsp:
2276                 iwl_free_resp(&cmd);
2277         }
2278         return ret;
2279 }
2280
2281 int iwl_mvm_flush_sta(struct iwl_mvm *mvm, void *sta, bool internal)
2282 {
2283         u32 sta_id, tfd_queue_msk;
2284
2285         if (internal) {
2286                 struct iwl_mvm_int_sta *int_sta = sta;
2287
2288                 sta_id = int_sta->sta_id;
2289                 tfd_queue_msk = int_sta->tfd_queue_msk;
2290         } else {
2291                 struct iwl_mvm_sta *mvm_sta = sta;
2292
2293                 sta_id = mvm_sta->deflink.sta_id;
2294                 tfd_queue_msk = mvm_sta->tfd_queue_msk;
2295         }
2296
2297         if (iwl_mvm_has_new_tx_api(mvm))
2298                 return iwl_mvm_flush_sta_tids(mvm, sta_id, 0xffff);
2299
2300         return iwl_mvm_flush_tx_path(mvm, tfd_queue_msk);
2301 }