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

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