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

   1 /******************************************************************************
   2  *
   3  * This file is provided under a dual BSD/GPLv2 license.  When using or
   4  * redistributing this file, you may do so under either license.
   5  *
   6  * GPL LICENSE SUMMARY
   7  *
   8  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
   9  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
  10  * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
  11  * Copyright(c) 2018 - 2019 Intel Corporation
  12  *
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of version 2 of the GNU General Public License as
  15  * published by the Free Software Foundation.
  16  *
  17  * This program is distributed in the hope that it will be useful, but
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  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  20  * General Public License for more details.
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  22  * The full GNU General Public License is included in this distribution
  23  * in the file called COPYING.
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  26  *  Intel Linux Wireless <linuxwifi@intel.com>
  27  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  28  *
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  30  *
  31  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  32  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
  33  * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
  34  * Copyright(c) 2018 - 2019 Intel Corporation
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  38  * modification, are permitted provided that the following conditions
  39  * are met:
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  42  *    notice, this list of conditions and the following disclaimer.
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  45  *    the documentation and/or other materials provided with the
  46  *    distribution.
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  48  *    contributors may be used to endorse or promote products derived
  49  *    from this software without specific prior written permission.
  50  *
  51  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  52  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  53  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  54  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  55  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  56  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  57  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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  59  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  60  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  61  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  62  *
  63  *****************************************************************************/
  64 #include <linux/ieee80211.h>
  65 #include <linux/etherdevice.h>
  66 #include <linux/tcp.h>
  67 #include <net/ip.h>
  68 #include <net/ipv6.h>
  69
  70 #include "iwl-trans.h"
  71 #include "iwl-eeprom-parse.h"
  72 #include "mvm.h"
  73 #include "sta.h"
  74
  75 static void
  76 iwl_mvm_bar_check_trigger(struct iwl_mvm *mvm, const u8 *addr,
  77                           u16 tid, u16 ssn)
  78 {
  79         struct iwl_fw_dbg_trigger_tlv *trig;
  80         struct iwl_fw_dbg_trigger_ba *ba_trig;
  81
  82         trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, FW_DBG_TRIGGER_BA);
  83         if (!trig)
  84                 return;
  85
  86         ba_trig = (void *)trig->data;
  87
  88         if (!(le16_to_cpu(ba_trig->tx_bar) & BIT(tid)))
  89                 return;
  90
  91         iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
  92                                 "BAR sent to %pM, tid %d, ssn %d",
  93                                 addr, tid, ssn);
  94 }
  95
  96 #define OPT_HDR(type, skb, off) \
  97         (type *)(skb_network_header(skb) + (off))
  98
  99 static u16 iwl_mvm_tx_csum(struct iwl_mvm *mvm, struct sk_buff *skb,
 100                            struct ieee80211_hdr *hdr,
 101                            struct ieee80211_tx_info *info,
 102                            u16 offload_assist)
 103 {
 104 #if IS_ENABLED(CONFIG_INET)
 105         u16 mh_len = ieee80211_hdrlen(hdr->frame_control);
 106         u8 protocol = 0;
 107
 108         /*
 109          * Do not compute checksum if already computed or if transport will
 110          * compute it
 111          */
 112         if (skb->ip_summed != CHECKSUM_PARTIAL || IWL_MVM_SW_TX_CSUM_OFFLOAD)
 113                 goto out;
 114
 115         /* We do not expect to be requested to csum stuff we do not support */
 116         if (WARN_ONCE(!(mvm->hw->netdev_features & IWL_TX_CSUM_NETIF_FLAGS) ||
 117                       (skb->protocol != htons(ETH_P_IP) &&
 118                        skb->protocol != htons(ETH_P_IPV6)),
 119                       "No support for requested checksum\n")) {
 120                 skb_checksum_help(skb);
 121                 goto out;
 122         }
 123
 124         if (skb->protocol == htons(ETH_P_IP)) {
 125                 protocol = ip_hdr(skb)->protocol;
 126         } else {
 127 #if IS_ENABLED(CONFIG_IPV6)
 128                 struct ipv6hdr *ipv6h =
 129                         (struct ipv6hdr *)skb_network_header(skb);
 130                 unsigned int off = sizeof(*ipv6h);
 131
 132                 protocol = ipv6h->nexthdr;
 133                 while (protocol != NEXTHDR_NONE && ipv6_ext_hdr(protocol)) {
 134                         struct ipv6_opt_hdr *hp;
 135
 136                         /* only supported extension headers */
 137                         if (protocol != NEXTHDR_ROUTING &&
 138                             protocol != NEXTHDR_HOP &&
 139                             protocol != NEXTHDR_DEST) {
 140                                 skb_checksum_help(skb);
 141                                 goto out;
 142                         }
 143
 144                         hp = OPT_HDR(struct ipv6_opt_hdr, skb, off);
 145                         protocol = hp->nexthdr;
 146                         off += ipv6_optlen(hp);
 147                 }
 148                 /* if we get here - protocol now should be TCP/UDP */
 149 #endif
 150         }
 151
 152         if (protocol != IPPROTO_TCP && protocol != IPPROTO_UDP) {
 153                 WARN_ON_ONCE(1);
 154                 skb_checksum_help(skb);
 155                 goto out;
 156         }
 157
 158         /* enable L4 csum */
 159         offload_assist |= BIT(TX_CMD_OFFLD_L4_EN);
 160
 161         /*
 162          * Set offset to IP header (snap).
 163          * We don't support tunneling so no need to take care of inner header.
 164          * Size is in words.
 165          */
 166         offload_assist |= (4 << TX_CMD_OFFLD_IP_HDR);
 167
 168         /* Do IPv4 csum for AMSDU only (no IP csum for Ipv6) */
 169         if (skb->protocol == htons(ETH_P_IP) &&
 170             (offload_assist & BIT(TX_CMD_OFFLD_AMSDU))) {
 171                 ip_hdr(skb)->check = 0;
 172                 offload_assist |= BIT(TX_CMD_OFFLD_L3_EN);
 173         }
 174
 175         /* reset UDP/TCP header csum */
 176         if (protocol == IPPROTO_TCP)
 177                 tcp_hdr(skb)->check = 0;
 178         else
 179                 udp_hdr(skb)->check = 0;
 180
 181         /*
 182          * mac header len should include IV, size is in words unless
 183          * the IV is added by the firmware like in WEP.
 184          * In new Tx API, the IV is always added by the firmware.
 185          */
 186         if (!iwl_mvm_has_new_tx_api(mvm) && info->control.hw_key &&
 187             info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP40 &&
 188             info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP104)
 189                 mh_len += info->control.hw_key->iv_len;
 190         mh_len /= 2;
 191         offload_assist |= mh_len << TX_CMD_OFFLD_MH_SIZE;
 192
 193 out:
 194 #endif
 195         return offload_assist;
 196 }
 197
 198 /*
 199  * Sets most of the Tx cmd's fields
 200  */
 201 void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb,
 202                         struct iwl_tx_cmd *tx_cmd,
 203                         struct ieee80211_tx_info *info, u8 sta_id)
 204 {
 205         struct ieee80211_hdr *hdr = (void *)skb->data;
 206         __le16 fc = hdr->frame_control;
 207         u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags);
 208         u32 len = skb->len + FCS_LEN;
 209         u16 offload_assist = 0;
 210         u8 ac;
 211
 212         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) ||
 213             (ieee80211_is_probe_resp(fc) &&
 214              !is_multicast_ether_addr(hdr->addr1)))
 215                 tx_flags |= TX_CMD_FLG_ACK;
 216         else
 217                 tx_flags &= ~TX_CMD_FLG_ACK;
 218
 219         if (ieee80211_is_probe_resp(fc))
 220                 tx_flags |= TX_CMD_FLG_TSF;
 221
 222         if (ieee80211_has_morefrags(fc))
 223                 tx_flags |= TX_CMD_FLG_MORE_FRAG;
 224
 225         if (ieee80211_is_data_qos(fc)) {
 226                 u8 *qc = ieee80211_get_qos_ctl(hdr);
 227                 tx_cmd->tid_tspec = qc[0] & 0xf;
 228                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
 229                 if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT)
 230                         offload_assist |= BIT(TX_CMD_OFFLD_AMSDU);
 231         } else if (ieee80211_is_back_req(fc)) {
 232                 struct ieee80211_bar *bar = (void *)skb->data;
 233                 u16 control = le16_to_cpu(bar->control);
 234                 u16 ssn = le16_to_cpu(bar->start_seq_num);
 235
 236                 tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR;
 237                 tx_cmd->tid_tspec = (control &
 238                                      IEEE80211_BAR_CTRL_TID_INFO_MASK) >>
 239                         IEEE80211_BAR_CTRL_TID_INFO_SHIFT;
 240                 WARN_ON_ONCE(tx_cmd->tid_tspec >= IWL_MAX_TID_COUNT);
 241                 iwl_mvm_bar_check_trigger(mvm, bar->ra, tx_cmd->tid_tspec,
 242                                           ssn);
 243         } else {
 244                 if (ieee80211_is_data(fc))
 245                         tx_cmd->tid_tspec = IWL_TID_NON_QOS;
 246                 else
 247                         tx_cmd->tid_tspec = IWL_MAX_TID_COUNT;
 248
 249                 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
 250                         tx_flags |= TX_CMD_FLG_SEQ_CTL;
 251                 else
 252                         tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
 253         }
 254
 255         /* Default to 0 (BE) when tid_spec is set to IWL_MAX_TID_COUNT */
 256         if (tx_cmd->tid_tspec < IWL_MAX_TID_COUNT)
 257                 ac = tid_to_mac80211_ac[tx_cmd->tid_tspec];
 258         else
 259                 ac = tid_to_mac80211_ac[0];
 260
 261         tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) <<
 262                         TX_CMD_FLG_BT_PRIO_POS;
 263
 264         if (ieee80211_is_mgmt(fc)) {
 265                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
 266                         tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_ASSOC);
 267                 else if (ieee80211_is_action(fc))
 268                         tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
 269                 else
 270                         tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
 271
 272                 /* The spec allows Action frames in A-MPDU, we don't support
 273                  * it
 274                  */
 275                 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU);
 276         } else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) {
 277                 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
 278         } else {
 279                 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
 280         }
 281
 282         if (ieee80211_is_data(fc) && len > mvm->rts_threshold &&
 283             !is_multicast_ether_addr(hdr->addr1))
 284                 tx_flags |= TX_CMD_FLG_PROT_REQUIRE;
 285
 286         if (fw_has_capa(&mvm->fw->ucode_capa,
 287                         IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT) &&
 288             ieee80211_action_contains_tpc(skb))
 289                 tx_flags |= TX_CMD_FLG_WRITE_TX_POWER;
 290
 291         tx_cmd->tx_flags = cpu_to_le32(tx_flags);
 292         /* Total # bytes to be transmitted - PCIe code will adjust for A-MSDU */
 293         tx_cmd->len = cpu_to_le16((u16)skb->len);
 294         tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
 295         tx_cmd->sta_id = sta_id;
 296
 297         /* padding is inserted later in transport */
 298         if (ieee80211_hdrlen(fc) % 4 &&
 299             !(offload_assist & BIT(TX_CMD_OFFLD_AMSDU)))
 300                 offload_assist |= BIT(TX_CMD_OFFLD_PAD);
 301
 302         tx_cmd->offload_assist |=
 303                 cpu_to_le16(iwl_mvm_tx_csum(mvm, skb, hdr, info,
 304                                             offload_assist));
 305 }
 306
 307 static u32 iwl_mvm_get_tx_ant(struct iwl_mvm *mvm,
 308                               struct ieee80211_tx_info *info,
 309                               struct ieee80211_sta *sta, __le16 fc)
 310 {
 311         if (info->band == NL80211_BAND_2GHZ &&
 312             !iwl_mvm_bt_coex_is_shared_ant_avail(mvm))
 313                 return mvm->cfg->non_shared_ant << RATE_MCS_ANT_POS;
 314
 315         if (sta && ieee80211_is_data(fc)) {
 316                 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 317
 318                 return BIT(mvmsta->tx_ant) << RATE_MCS_ANT_POS;
 319         }
 320
 321         return BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS;
 322 }
 323
 324 static u32 iwl_mvm_get_tx_rate(struct iwl_mvm *mvm,
 325                                struct ieee80211_tx_info *info,
 326                                struct ieee80211_sta *sta)
 327 {
 328         int rate_idx;
 329         u8 rate_plcp;
 330         u32 rate_flags = 0;
 331
 332         /* HT rate doesn't make sense for a non data frame */
 333         WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS,
 334                   "Got an HT rate (flags:0x%x/mcs:%d) for a non data frame\n",
 335                   info->control.rates[0].flags,
 336                   info->control.rates[0].idx);
 337
 338         rate_idx = info->control.rates[0].idx;
 339         /* if the rate isn't a well known legacy rate, take the lowest one */
 340         if (rate_idx < 0 || rate_idx >= IWL_RATE_COUNT_LEGACY)
 341                 rate_idx = rate_lowest_index(
 342                                 &mvm->nvm_data->bands[info->band], sta);
 343
 344         /*
 345          * For non 2 GHZ band, remap mac80211 rate
 346          * indices into driver indices
 347          */
 348         if (info->band != NL80211_BAND_2GHZ)
 349                 rate_idx += IWL_FIRST_OFDM_RATE;
 350
 351         /* For 2.4 GHZ band, check that there is no need to remap */
 352         BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
 353
 354         /* Get PLCP rate for tx_cmd->rate_n_flags */
 355         rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(rate_idx);
 356
 357         /* Set CCK flag as needed */
 358         if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
 359                 rate_flags |= RATE_MCS_CCK_MSK;
 360
 361         return (u32)rate_plcp | rate_flags;
 362 }
 363
 364 static u32 iwl_mvm_get_tx_rate_n_flags(struct iwl_mvm *mvm,
 365                                        struct ieee80211_tx_info *info,
 366                                        struct ieee80211_sta *sta, __le16 fc)
 367 {
 368         return iwl_mvm_get_tx_rate(mvm, info, sta) |
 369                 iwl_mvm_get_tx_ant(mvm, info, sta, fc);
 370 }
 371
 372 /*
 373  * Sets the fields in the Tx cmd that are rate related
 374  */
 375 void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd,
 376                             struct ieee80211_tx_info *info,
 377                             struct ieee80211_sta *sta, __le16 fc)
 378 {
 379         /* Set retry limit on RTS packets */
 380         tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT;
 381
 382         /* Set retry limit on DATA packets and Probe Responses*/
 383         if (ieee80211_is_probe_resp(fc)) {
 384                 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT;
 385                 tx_cmd->rts_retry_limit =
 386                         min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit);
 387         } else if (ieee80211_is_back_req(fc)) {
 388                 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT;
 389         } else {
 390                 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY;
 391         }
 392
 393         /*
 394          * for data packets, rate info comes from the table inside the fw. This
 395          * table is controlled by LINK_QUALITY commands
 396          */
 397
 398         if (ieee80211_is_data(fc) && sta) {
 399                 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 400
 401                 if (mvmsta->sta_state >= IEEE80211_STA_AUTHORIZED) {
 402                         tx_cmd->initial_rate_index = 0;
 403                         tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE);
 404                         return;
 405                 }
 406         } else if (ieee80211_is_back_req(fc)) {
 407                 tx_cmd->tx_flags |=
 408                         cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR);
 409         }
 410
 411         /* Set the rate in the TX cmd */
 412         tx_cmd->rate_n_flags =
 413                 cpu_to_le32(iwl_mvm_get_tx_rate_n_flags(mvm, info, sta, fc));
 414 }
 415
 416 static inline void iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info *info,
 417                                          u8 *crypto_hdr)
 418 {
 419         struct ieee80211_key_conf *keyconf = info->control.hw_key;
 420         u64 pn;
 421
 422         pn = atomic64_inc_return(&keyconf->tx_pn);
 423         crypto_hdr[0] = pn;
 424         crypto_hdr[2] = 0;
 425         crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6);
 426         crypto_hdr[1] = pn >> 8;
 427         crypto_hdr[4] = pn >> 16;
 428         crypto_hdr[5] = pn >> 24;
 429         crypto_hdr[6] = pn >> 32;
 430         crypto_hdr[7] = pn >> 40;
 431 }
 432
 433 /*
 434  * Sets the fields in the Tx cmd that are crypto related
 435  */
 436 static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm,
 437                                       struct ieee80211_tx_info *info,
 438                                       struct iwl_tx_cmd *tx_cmd,
 439                                       struct sk_buff *skb_frag,
 440                                       int hdrlen)
 441 {
 442         struct ieee80211_key_conf *keyconf = info->control.hw_key;
 443         u8 *crypto_hdr = skb_frag->data + hdrlen;
 444         enum iwl_tx_cmd_sec_ctrl type = TX_CMD_SEC_CCM;
 445         u64 pn;
 446
 447         switch (keyconf->cipher) {
 448         case WLAN_CIPHER_SUITE_CCMP:
 449                 iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd);
 450                 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr);
 451                 break;
 452
 453         case WLAN_CIPHER_SUITE_TKIP:
 454                 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
 455                 pn = atomic64_inc_return(&keyconf->tx_pn);
 456                 ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn);
 457                 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
 458                 break;
 459
 460         case WLAN_CIPHER_SUITE_WEP104:
 461                 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
 462                 /* fall through */
 463         case WLAN_CIPHER_SUITE_WEP40:
 464                 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP |
 465                         ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) &
 466                           TX_CMD_SEC_WEP_KEY_IDX_MSK);
 467
 468                 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
 469                 break;
 470         case WLAN_CIPHER_SUITE_GCMP:
 471         case WLAN_CIPHER_SUITE_GCMP_256:
 472                 type = TX_CMD_SEC_GCMP;
 473                 /* Fall through */
 474         case WLAN_CIPHER_SUITE_CCMP_256:
 475                 /* TODO: Taking the key from the table might introduce a race
 476                  * when PTK rekeying is done, having an old packets with a PN
 477                  * based on the old key but the message encrypted with a new
 478                  * one.
 479                  * Need to handle this.
 480                  */
 481                 tx_cmd->sec_ctl |= type | TX_CMD_SEC_KEY_FROM_TABLE;
 482                 tx_cmd->key[0] = keyconf->hw_key_idx;
 483                 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr);
 484                 break;
 485         default:
 486                 tx_cmd->sec_ctl |= TX_CMD_SEC_EXT;
 487         }
 488 }
 489
 490 /*
 491  * Allocates and sets the Tx cmd the driver data pointers in the skb
 492  */
 493 static struct iwl_device_tx_cmd *
 494 iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb,
 495                       struct ieee80211_tx_info *info, int hdrlen,
 496                       struct ieee80211_sta *sta, u8 sta_id)
 497 {
 498         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 499         struct iwl_device_tx_cmd *dev_cmd;
 500         struct iwl_tx_cmd *tx_cmd;
 501
 502         dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans);
 503
 504         if (unlikely(!dev_cmd))
 505                 return NULL;
 506
 507         dev_cmd->hdr.cmd = TX_CMD;
 508
 509         if (iwl_mvm_has_new_tx_api(mvm)) {
 510                 u16 offload_assist = 0;
 511                 u32 rate_n_flags = 0;
 512                 u16 flags = 0;
 513                 struct iwl_mvm_sta *mvmsta = sta ?
 514                         iwl_mvm_sta_from_mac80211(sta) : NULL;
 515
 516                 if (ieee80211_is_data_qos(hdr->frame_control)) {
 517                         u8 *qc = ieee80211_get_qos_ctl(hdr);
 518
 519                         if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT)
 520                                 offload_assist |= BIT(TX_CMD_OFFLD_AMSDU);
 521                 }
 522
 523                 offload_assist = iwl_mvm_tx_csum(mvm, skb, hdr, info,
 524                                                  offload_assist);
 525
 526                 /* padding is inserted later in transport */
 527                 if (ieee80211_hdrlen(hdr->frame_control) % 4 &&
 528                     !(offload_assist & BIT(TX_CMD_OFFLD_AMSDU)))
 529                         offload_assist |= BIT(TX_CMD_OFFLD_PAD);
 530
 531                 if (!info->control.hw_key)
 532                         flags |= IWL_TX_FLAGS_ENCRYPT_DIS;
 533
 534                 /*
 535                  * For data packets rate info comes from the fw. Only
 536                  * set rate/antenna during connection establishment or in case
 537                  * no station is given.
 538                  */
 539                 if (!sta || !ieee80211_is_data(hdr->frame_control) ||
 540                     mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) {
 541                         flags |= IWL_TX_FLAGS_CMD_RATE;
 542                         rate_n_flags =
 543                                 iwl_mvm_get_tx_rate_n_flags(mvm, info, sta,
 544                                                             hdr->frame_control);
 545                 }
 546
 547                 if (mvm->trans->trans_cfg->device_family >=
 548                     IWL_DEVICE_FAMILY_AX210) {
 549                         struct iwl_tx_cmd_gen3 *cmd = (void *)dev_cmd->payload;
 550
 551                         cmd->offload_assist |= cpu_to_le32(offload_assist);
 552
 553                         /* Total # bytes to be transmitted */
 554                         cmd->len = cpu_to_le16((u16)skb->len);
 555
 556                         /* Copy MAC header from skb into command buffer */
 557                         memcpy(cmd->hdr, hdr, hdrlen);
 558
 559                         cmd->flags = cpu_to_le16(flags);
 560                         cmd->rate_n_flags = cpu_to_le32(rate_n_flags);
 561                 } else {
 562                         struct iwl_tx_cmd_gen2 *cmd = (void *)dev_cmd->payload;
 563
 564                         cmd->offload_assist |= cpu_to_le16(offload_assist);
 565
 566                         /* Total # bytes to be transmitted */
 567                         cmd->len = cpu_to_le16((u16)skb->len);
 568
 569                         /* Copy MAC header from skb into command buffer */
 570                         memcpy(cmd->hdr, hdr, hdrlen);
 571
 572                         cmd->flags = cpu_to_le32(flags);
 573                         cmd->rate_n_flags = cpu_to_le32(rate_n_flags);
 574                 }
 575                 goto out;
 576         }
 577
 578         tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
 579
 580         if (info->control.hw_key)
 581                 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen);
 582
 583         iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id);
 584
 585         iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control);
 586
 587         /* Copy MAC header from skb into command buffer */
 588         memcpy(tx_cmd->hdr, hdr, hdrlen);
 589
 590 out:
 591         return dev_cmd;
 592 }
 593
 594 static void iwl_mvm_skb_prepare_status(struct sk_buff *skb,
 595                                        struct iwl_device_tx_cmd *cmd)
 596 {
 597         struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb);
 598
 599         memset(&skb_info->status, 0, sizeof(skb_info->status));
 600         memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data));
 601
 602         skb_info->driver_data[1] = cmd;
 603 }
 604
 605 static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm,
 606                                       struct ieee80211_tx_info *info,
 607                                       struct ieee80211_hdr *hdr)
 608 {
 609         struct iwl_mvm_vif *mvmvif =
 610                 iwl_mvm_vif_from_mac80211(info->control.vif);
 611         __le16 fc = hdr->frame_control;
 612
 613         switch (info->control.vif->type) {
 614         case NL80211_IFTYPE_AP:
 615         case NL80211_IFTYPE_ADHOC:
 616                 /*
 617                  * Non-bufferable frames use the broadcast station, thus they
 618                  * use the probe queue.
 619                  * Also take care of the case where we send a deauth to a
 620                  * station that we don't have, or similarly an association
 621                  * response (with non-success status) for a station we can't
 622                  * accept.
 623                  * Also, disassociate frames might happen, particular with
 624                  * reason 7 ("Class 3 frame received from nonassociated STA").
 625                  */
 626                 if (ieee80211_is_mgmt(fc) &&
 627                     (!ieee80211_is_bufferable_mmpdu(fc) ||
 628                      ieee80211_is_deauth(fc) || ieee80211_is_disassoc(fc)))
 629                         return mvm->probe_queue;
 630
 631                 if (!ieee80211_has_order(fc) && !ieee80211_is_probe_req(fc) &&
 632                     is_multicast_ether_addr(hdr->addr1))
 633                         return mvmvif->cab_queue;
 634
 635                 WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC,
 636                           "fc=0x%02x", le16_to_cpu(fc));
 637                 return mvm->probe_queue;
 638         case NL80211_IFTYPE_P2P_DEVICE:
 639                 if (ieee80211_is_mgmt(fc))
 640                         return mvm->p2p_dev_queue;
 641
 642                 WARN_ON_ONCE(1);
 643                 return mvm->p2p_dev_queue;
 644         default:
 645                 WARN_ONCE(1, "Not a ctrl vif, no available queue\n");
 646                 return -1;
 647         }
 648 }
 649
 650 static void iwl_mvm_probe_resp_set_noa(struct iwl_mvm *mvm,
 651                                        struct sk_buff *skb)
 652 {
 653         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 654         struct iwl_mvm_vif *mvmvif =
 655                 iwl_mvm_vif_from_mac80211(info->control.vif);
 656         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
 657         int base_len = (u8 *)mgmt->u.probe_resp.variable - (u8 *)mgmt;
 658         struct iwl_probe_resp_data *resp_data;
 659         u8 *ie, *pos;
 660         u8 match[] = {
 661                 (WLAN_OUI_WFA >> 16) & 0xff,
 662                 (WLAN_OUI_WFA >> 8) & 0xff,
 663                 WLAN_OUI_WFA & 0xff,
 664                 WLAN_OUI_TYPE_WFA_P2P,
 665         };
 666
 667         rcu_read_lock();
 668
 669         resp_data = rcu_dereference(mvmvif->probe_resp_data);
 670         if (!resp_data)
 671                 goto out;
 672
 673         if (!resp_data->notif.noa_active)
 674                 goto out;
 675
 676         ie = (u8 *)cfg80211_find_ie_match(WLAN_EID_VENDOR_SPECIFIC,
 677                                           mgmt->u.probe_resp.variable,
 678                                           skb->len - base_len,
 679                                           match, 4, 2);
 680         if (!ie) {
 681                 IWL_DEBUG_TX(mvm, "probe resp doesn't have P2P IE\n");
 682                 goto out;
 683         }
 684
 685         if (skb_tailroom(skb) < resp_data->noa_len) {
 686                 if (pskb_expand_head(skb, 0, resp_data->noa_len, GFP_ATOMIC)) {
 687                         IWL_ERR(mvm,
 688                                 "Failed to reallocate probe resp\n");
 689                         goto out;
 690                 }
 691         }
 692
 693         pos = skb_put(skb, resp_data->noa_len);
 694
 695         *pos++ = WLAN_EID_VENDOR_SPECIFIC;
 696         /* Set length of IE body (not including ID and length itself) */
 697         *pos++ = resp_data->noa_len - 2;
 698         *pos++ = (WLAN_OUI_WFA >> 16) & 0xff;
 699         *pos++ = (WLAN_OUI_WFA >> 8) & 0xff;
 700         *pos++ = WLAN_OUI_WFA & 0xff;
 701         *pos++ = WLAN_OUI_TYPE_WFA_P2P;
 702
 703         memcpy(pos, &resp_data->notif.noa_attr,
 704                resp_data->noa_len - sizeof(struct ieee80211_vendor_ie));
 705
 706 out:
 707         rcu_read_unlock();
 708 }
 709
 710 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb)
 711 {
 712         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 713         struct ieee80211_tx_info info;
 714         struct iwl_device_tx_cmd *dev_cmd;
 715         u8 sta_id;
 716         int hdrlen = ieee80211_hdrlen(hdr->frame_control);
 717         __le16 fc = hdr->frame_control;
 718         bool offchannel = IEEE80211_SKB_CB(skb)->flags &
 719                 IEEE80211_TX_CTL_TX_OFFCHAN;
 720         int queue = -1;
 721
 722         if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc))
 723                 return -1;
 724
 725         memcpy(&info, skb->cb, sizeof(info));
 726
 727         if (WARN_ON_ONCE(skb->len > IEEE80211_MAX_DATA_LEN + hdrlen))
 728                 return -1;
 729
 730         if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU))
 731                 return -1;
 732
 733         if (info.control.vif) {
 734                 struct iwl_mvm_vif *mvmvif =
 735                         iwl_mvm_vif_from_mac80211(info.control.vif);
 736
 737                 if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE ||
 738                     info.control.vif->type == NL80211_IFTYPE_AP ||
 739                     info.control.vif->type == NL80211_IFTYPE_ADHOC) {
 740                         if (!ieee80211_is_data(hdr->frame_control))
 741                                 sta_id = mvmvif->bcast_sta.sta_id;
 742                         else
 743                                 sta_id = mvmvif->mcast_sta.sta_id;
 744
 745                         queue = iwl_mvm_get_ctrl_vif_queue(mvm, &info, hdr);
 746                 } else if (info.control.vif->type == NL80211_IFTYPE_MONITOR) {
 747                         queue = mvm->snif_queue;
 748                         sta_id = mvm->snif_sta.sta_id;
 749                 } else if (info.control.vif->type == NL80211_IFTYPE_STATION &&
 750                            offchannel) {
 751                         /*
 752                          * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets
 753                          * that can be used in 2 different types of vifs, P2P &
 754                          * STATION.
 755                          * P2P uses the offchannel queue.
 756                          * STATION (HS2.0) uses the auxiliary context of the FW,
 757                          * and hence needs to be sent on the aux queue.
 758                          */
 759                         sta_id = mvm->aux_sta.sta_id;
 760                         queue = mvm->aux_queue;
 761                 }
 762         }
 763
 764         if (queue < 0) {
 765                 IWL_ERR(mvm, "No queue was found. Dropping TX\n");
 766                 return -1;
 767         }
 768
 769         if (unlikely(ieee80211_is_probe_resp(fc)))
 770                 iwl_mvm_probe_resp_set_noa(mvm, skb);
 771
 772         IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue);
 773
 774         dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id);
 775         if (!dev_cmd)
 776                 return -1;
 777
 778         /* From now on, we cannot access info->control */
 779         iwl_mvm_skb_prepare_status(skb, dev_cmd);
 780
 781         if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) {
 782                 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
 783                 return -1;
 784         }
 785
 786         return 0;
 787 }
 788
 789 unsigned int iwl_mvm_max_amsdu_size(struct iwl_mvm *mvm,
 790                                     struct ieee80211_sta *sta, unsigned int tid)
 791 {
 792         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 793         enum nl80211_band band = mvmsta->vif->bss_conf.chandef.chan->band;
 794         u8 ac = tid_to_mac80211_ac[tid];
 795         unsigned int txf;
 796         int lmac = IWL_LMAC_24G_INDEX;
 797
 798         if (iwl_mvm_is_cdb_supported(mvm) &&
 799             band == NL80211_BAND_5GHZ)
 800                 lmac = IWL_LMAC_5G_INDEX;
 801
 802         /* For HE redirect to trigger based fifos */
 803         if (sta->he_cap.has_he && !WARN_ON(!iwl_mvm_has_new_tx_api(mvm)))
 804                 ac += 4;
 805
 806         txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac);
 807
 808         /*
 809          * Don't send an AMSDU that will be longer than the TXF.
 810          * Add a security margin of 256 for the TX command + headers.
 811          * We also want to have the start of the next packet inside the
 812          * fifo to be able to send bursts.
 813          */
 814         return min_t(unsigned int, mvmsta->max_amsdu_len,
 815                      mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256);
 816 }
 817
 818 #ifdef CONFIG_INET
 819
 820 static int
 821 iwl_mvm_tx_tso_segment(struct sk_buff *skb, unsigned int num_subframes,
 822                        netdev_features_t netdev_flags,
 823                        struct sk_buff_head *mpdus_skb)
 824 {
 825         struct sk_buff *tmp, *next;
 826         struct ieee80211_hdr *hdr = (void *)skb->data;
 827         char cb[sizeof(skb->cb)];
 828         u16 i = 0;
 829         unsigned int tcp_payload_len;
 830         unsigned int mss = skb_shinfo(skb)->gso_size;
 831         bool ipv4 = (skb->protocol == htons(ETH_P_IP));
 832         bool qos = ieee80211_is_data_qos(hdr->frame_control);
 833         u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0;
 834
 835         skb_shinfo(skb)->gso_size = num_subframes * mss;
 836         memcpy(cb, skb->cb, sizeof(cb));
 837
 838         next = skb_gso_segment(skb, netdev_flags);
 839         skb_shinfo(skb)->gso_size = mss;
 840         if (WARN_ON_ONCE(IS_ERR(next)))
 841                 return -EINVAL;
 842         else if (next)
 843                 consume_skb(skb);
 844
 845         while (next) {
 846                 tmp = next;
 847                 next = tmp->next;
 848
 849                 memcpy(tmp->cb, cb, sizeof(tmp->cb));
 850                 /*
 851                  * Compute the length of all the data added for the A-MSDU.
 852                  * This will be used to compute the length to write in the TX
 853                  * command. We have: SNAP + IP + TCP for n -1 subframes and
 854                  * ETH header for n subframes.
 855                  */
 856                 tcp_payload_len = skb_tail_pointer(tmp) -
 857                         skb_transport_header(tmp) -
 858                         tcp_hdrlen(tmp) + tmp->data_len;
 859
 860                 if (ipv4)
 861                         ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes);
 862
 863                 if (tcp_payload_len > mss) {
 864                         skb_shinfo(tmp)->gso_size = mss;
 865                 } else {
 866                         if (qos) {
 867                                 u8 *qc;
 868
 869                                 if (ipv4)
 870                                         ip_send_check(ip_hdr(tmp));
 871
 872                                 qc = ieee80211_get_qos_ctl((void *)tmp->data);
 873                                 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
 874                         }
 875                         skb_shinfo(tmp)->gso_size = 0;
 876                 }
 877
 878                 tmp->prev = NULL;
 879                 tmp->next = NULL;
 880
 881                 __skb_queue_tail(mpdus_skb, tmp);
 882                 i++;
 883         }
 884
 885         return 0;
 886 }
 887
 888 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
 889                           struct ieee80211_tx_info *info,
 890                           struct ieee80211_sta *sta,
 891                           struct sk_buff_head *mpdus_skb)
 892 {
 893         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 894         struct ieee80211_hdr *hdr = (void *)skb->data;
 895         unsigned int mss = skb_shinfo(skb)->gso_size;
 896         unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len;
 897         u16 snap_ip_tcp, pad;
 898         netdev_features_t netdev_flags = NETIF_F_CSUM_MASK | NETIF_F_SG;
 899         u8 tid;
 900
 901         snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) +
 902                 tcp_hdrlen(skb);
 903
 904         if (!mvmsta->max_amsdu_len ||
 905             !ieee80211_is_data_qos(hdr->frame_control) ||
 906             !mvmsta->amsdu_enabled)
 907                 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
 908
 909         /*
 910          * Do not build AMSDU for IPv6 with extension headers.
 911          * ask stack to segment and checkum the generated MPDUs for us.
 912          */
 913         if (skb->protocol == htons(ETH_P_IPV6) &&
 914             ((struct ipv6hdr *)skb_network_header(skb))->nexthdr !=
 915             IPPROTO_TCP) {
 916                 netdev_flags &= ~NETIF_F_CSUM_MASK;
 917                 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
 918         }
 919
 920         tid = ieee80211_get_tid(hdr);
 921         if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
 922                 return -EINVAL;
 923
 924         /*
 925          * No need to lock amsdu_in_ampdu_allowed since it can't be modified
 926          * during an BA session.
 927          */
 928         if (info->flags & IEEE80211_TX_CTL_AMPDU &&
 929             !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed)
 930                 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
 931
 932         if (iwl_mvm_vif_low_latency(iwl_mvm_vif_from_mac80211(mvmsta->vif)) ||
 933             !(mvmsta->amsdu_enabled & BIT(tid)))
 934                 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
 935
 936         /*
 937          * Take the min of ieee80211 station and mvm station
 938          */
 939         max_amsdu_len =
 940                 min_t(unsigned int, sta->max_amsdu_len,
 941                       iwl_mvm_max_amsdu_size(mvm, sta, tid));
 942
 943         /*
 944          * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not
 945          * supported. This is a spec requirement (IEEE 802.11-2015
 946          * section 8.7.3 NOTE 3).
 947          */
 948         if (info->flags & IEEE80211_TX_CTL_AMPDU &&
 949             !sta->vht_cap.vht_supported)
 950                 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095);
 951
 952         /* Sub frame header + SNAP + IP header + TCP header + MSS */
 953         subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss;
 954         pad = (4 - subf_len) & 0x3;
 955
 956         /*
 957          * If we have N subframes in the A-MSDU, then the A-MSDU's size is
 958          * N * subf_len + (N - 1) * pad.
 959          */
 960         num_subframes = (max_amsdu_len + pad) / (subf_len + pad);
 961
 962         if (sta->max_amsdu_subframes &&
 963             num_subframes > sta->max_amsdu_subframes)
 964                 num_subframes = sta->max_amsdu_subframes;
 965
 966         tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
 967                 tcp_hdrlen(skb) + skb->data_len;
 968
 969         /*
 970          * Make sure we have enough TBs for the A-MSDU:
 971          *      2 for each subframe
 972          *      1 more for each fragment
 973          *      1 more for the potential data in the header
 974          */
 975         if ((num_subframes * 2 + skb_shinfo(skb)->nr_frags + 1) >
 976             mvm->trans->max_skb_frags)
 977                 num_subframes = 1;
 978
 979         if (num_subframes > 1)
 980                 *ieee80211_get_qos_ctl(hdr) |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
 981
 982         /* This skb fits in one single A-MSDU */
 983         if (num_subframes * mss >= tcp_payload_len) {
 984                 __skb_queue_tail(mpdus_skb, skb);
 985                 return 0;
 986         }
 987
 988         /*
 989          * Trick the segmentation function to make it
 990          * create SKBs that can fit into one A-MSDU.
 991          */
 992         return iwl_mvm_tx_tso_segment(skb, num_subframes, netdev_flags,
 993                                       mpdus_skb);
 994 }
 995 #else /* CONFIG_INET */
 996 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
 997                           struct ieee80211_tx_info *info,
 998                           struct ieee80211_sta *sta,
 999                           struct sk_buff_head *mpdus_skb)
1000 {
1001         /* Impossible to get TSO with CONFIG_INET */
1002         WARN_ON(1);
1003
1004         return -1;
1005 }
1006 #endif
1007
1008 /* Check if there are any timed-out TIDs on a given shared TXQ */
1009 static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id)
1010 {
1011         unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap;
1012         unsigned long now = jiffies;
1013         int tid;
1014
1015         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1016                 return false;
1017
1018         for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) {
1019                 if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] +
1020                                 IWL_MVM_DQA_QUEUE_TIMEOUT, now))
1021                         return true;
1022         }
1023
1024         return false;
1025 }
1026
1027 static void iwl_mvm_tx_airtime(struct iwl_mvm *mvm,
1028                                struct iwl_mvm_sta *mvmsta,
1029                                int airtime)
1030 {
1031         int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
1032         struct iwl_mvm_tcm_mac *mdata;
1033
1034         if (mac >= NUM_MAC_INDEX_DRIVER)
1035                 return;
1036
1037         mdata = &mvm->tcm.data[mac];
1038
1039         if (mvm->tcm.paused)
1040                 return;
1041
1042         if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD))
1043                 schedule_delayed_work(&mvm->tcm.work, 0);
1044
1045         mdata->tx.airtime += airtime;
1046 }
1047
1048 static int iwl_mvm_tx_pkt_queued(struct iwl_mvm *mvm,
1049                                  struct iwl_mvm_sta *mvmsta, int tid)
1050 {
1051         u32 ac = tid_to_mac80211_ac[tid];
1052         int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
1053         struct iwl_mvm_tcm_mac *mdata;
1054
1055         if (mac >= NUM_MAC_INDEX_DRIVER)
1056                 return -EINVAL;
1057
1058         mdata = &mvm->tcm.data[mac];
1059
1060         mdata->tx.pkts[ac]++;
1061
1062         return 0;
1063 }
1064
1065 /*
1066  * Sets the fields in the Tx cmd that are crypto related.
1067  *
1068  * This function must be called with BHs disabled.
1069  */
1070 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb,
1071                            struct ieee80211_tx_info *info,
1072                            struct ieee80211_sta *sta)
1073 {
1074         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1075         struct iwl_mvm_sta *mvmsta;
1076         struct iwl_device_tx_cmd *dev_cmd;
1077         __le16 fc;
1078         u16 seq_number = 0;
1079         u8 tid = IWL_MAX_TID_COUNT;
1080         u16 txq_id;
1081         bool is_ampdu = false;
1082         int hdrlen;
1083
1084         mvmsta = iwl_mvm_sta_from_mac80211(sta);
1085         fc = hdr->frame_control;
1086         hdrlen = ieee80211_hdrlen(fc);
1087
1088         if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc))
1089                 return -1;
1090
1091         if (WARN_ON_ONCE(!mvmsta))
1092                 return -1;
1093
1094         if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA))
1095                 return -1;
1096
1097         if (unlikely(ieee80211_is_probe_resp(fc)))
1098                 iwl_mvm_probe_resp_set_noa(mvm, skb);
1099
1100         dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen,
1101                                         sta, mvmsta->sta_id);
1102         if (!dev_cmd)
1103                 goto drop;
1104
1105         /*
1106          * we handle that entirely ourselves -- for uAPSD the firmware
1107          * will always send a notification, and for PS-Poll responses
1108          * we'll notify mac80211 when getting frame status
1109          */
1110         info->flags &= ~IEEE80211_TX_STATUS_EOSP;
1111
1112         spin_lock(&mvmsta->lock);
1113
1114         /* nullfunc frames should go to the MGMT queue regardless of QOS,
1115          * the condition of !ieee80211_is_qos_nullfunc(fc) keeps the default
1116          * assignment of MGMT TID
1117          */
1118         if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
1119                 tid = ieee80211_get_tid(hdr);
1120                 if (WARN_ONCE(tid >= IWL_MAX_TID_COUNT, "Invalid TID %d", tid))
1121                         goto drop_unlock_sta;
1122
1123                 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU;
1124                 if (WARN_ONCE(is_ampdu &&
1125                               mvmsta->tid_data[tid].state != IWL_AGG_ON,
1126                               "Invalid internal agg state %d for TID %d",
1127                                mvmsta->tid_data[tid].state, tid))
1128                         goto drop_unlock_sta;
1129
1130                 seq_number = mvmsta->tid_data[tid].seq_number;
1131                 seq_number &= IEEE80211_SCTL_SEQ;
1132
1133                 if (!iwl_mvm_has_new_tx_api(mvm)) {
1134                         struct iwl_tx_cmd *tx_cmd = (void *)dev_cmd->payload;
1135
1136                         hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
1137                         hdr->seq_ctrl |= cpu_to_le16(seq_number);
1138                         /* update the tx_cmd hdr as it was already copied */
1139                         tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl;
1140                 }
1141         } else if (ieee80211_is_data(fc) && !ieee80211_is_data_qos(fc)) {
1142                 tid = IWL_TID_NON_QOS;
1143         }
1144
1145         txq_id = mvmsta->tid_data[tid].txq_id;
1146
1147         WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
1148
1149         if (WARN_ONCE(txq_id == IWL_MVM_INVALID_QUEUE, "Invalid TXQ id")) {
1150                 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1151                 spin_unlock(&mvmsta->lock);
1152                 return -1;
1153         }
1154
1155         if (!iwl_mvm_has_new_tx_api(mvm)) {
1156                 /* Keep track of the time of the last frame for this RA/TID */
1157                 mvm->queue_info[txq_id].last_frame_time[tid] = jiffies;
1158
1159                 /*
1160                  * If we have timed-out TIDs - schedule the worker that will
1161                  * reconfig the queues and update them
1162                  *
1163                  * Note that the no lock is taken here in order to not serialize
1164                  * the TX flow. This isn't dangerous because scheduling
1165                  * mvm->add_stream_wk can't ruin the state, and if we DON'T
1166                  * schedule it due to some race condition then next TX we get
1167                  * here we will.
1168                  */
1169                 if (unlikely(mvm->queue_info[txq_id].status ==
1170                              IWL_MVM_QUEUE_SHARED &&
1171                              iwl_mvm_txq_should_update(mvm, txq_id)))
1172                         schedule_work(&mvm->add_stream_wk);
1173         }
1174
1175         IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x len %d\n",
1176                      mvmsta->sta_id, tid, txq_id,
1177                      IEEE80211_SEQ_TO_SN(seq_number), skb->len);
1178
1179         /* From now on, we cannot access info->control */
1180         iwl_mvm_skb_prepare_status(skb, dev_cmd);
1181
1182         if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id))
1183                 goto drop_unlock_sta;
1184
1185         if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc))
1186                 mvmsta->tid_data[tid].seq_number = seq_number + 0x10;
1187
1188         spin_unlock(&mvmsta->lock);
1189
1190         if (iwl_mvm_tx_pkt_queued(mvm, mvmsta,
1191                                   tid == IWL_MAX_TID_COUNT ? 0 : tid))
1192                 goto drop;
1193
1194         return 0;
1195
1196 drop_unlock_sta:
1197         iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1198         spin_unlock(&mvmsta->lock);
1199 drop:
1200         IWL_DEBUG_TX(mvm, "TX to [%d|%d] dropped\n", mvmsta->sta_id, tid);
1201         return -1;
1202 }
1203
1204 int iwl_mvm_tx_skb_sta(struct iwl_mvm *mvm, struct sk_buff *skb,
1205                        struct ieee80211_sta *sta)
1206 {
1207         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1208         struct ieee80211_tx_info info;
1209         struct sk_buff_head mpdus_skbs;
1210         unsigned int payload_len;
1211         int ret;
1212
1213         if (WARN_ON_ONCE(!mvmsta))
1214                 return -1;
1215
1216         if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA))
1217                 return -1;
1218
1219         memcpy(&info, skb->cb, sizeof(info));
1220
1221         if (!skb_is_gso(skb))
1222                 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1223
1224         payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
1225                 tcp_hdrlen(skb) + skb->data_len;
1226
1227         if (payload_len <= skb_shinfo(skb)->gso_size)
1228                 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1229
1230         __skb_queue_head_init(&mpdus_skbs);
1231
1232         ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs);
1233         if (ret)
1234                 return ret;
1235
1236         if (WARN_ON(skb_queue_empty(&mpdus_skbs)))
1237                 return ret;
1238
1239         while (!skb_queue_empty(&mpdus_skbs)) {
1240                 skb = __skb_dequeue(&mpdus_skbs);
1241
1242                 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1243                 if (ret) {
1244                         __skb_queue_purge(&mpdus_skbs);
1245                         return ret;
1246                 }
1247         }
1248
1249         return 0;
1250 }
1251
1252 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm,
1253                                       struct ieee80211_sta *sta, u8 tid)
1254 {
1255         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1256         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1257         struct ieee80211_vif *vif = mvmsta->vif;
1258         u16 normalized_ssn;
1259
1260         lockdep_assert_held(&mvmsta->lock);
1261
1262         if ((tid_data->state == IWL_AGG_ON ||
1263              tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) &&
1264             iwl_mvm_tid_queued(mvm, tid_data) == 0) {
1265                 /*
1266                  * Now that this aggregation or DQA queue is empty tell
1267                  * mac80211 so it knows we no longer have frames buffered for
1268                  * the station on this TID (for the TIM bitmap calculation.)
1269                  */
1270                 ieee80211_sta_set_buffered(sta, tid, false);
1271         }
1272
1273         /*
1274          * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
1275          * to align the wrap around of ssn so we compare relevant values.
1276          */
1277         normalized_ssn = tid_data->ssn;
1278         if (mvm->trans->trans_cfg->gen2)
1279                 normalized_ssn &= 0xff;
1280
1281         if (normalized_ssn != tid_data->next_reclaimed)
1282                 return;
1283
1284         switch (tid_data->state) {
1285         case IWL_EMPTYING_HW_QUEUE_ADDBA:
1286                 IWL_DEBUG_TX_QUEUES(mvm,
1287                                     "Can continue addBA flow ssn = next_recl = %d\n",
1288                                     tid_data->next_reclaimed);
1289                 tid_data->state = IWL_AGG_STARTING;
1290                 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1291                 break;
1292
1293         case IWL_EMPTYING_HW_QUEUE_DELBA:
1294                 IWL_DEBUG_TX_QUEUES(mvm,
1295                                     "Can continue DELBA flow ssn = next_recl = %d\n",
1296                                     tid_data->next_reclaimed);
1297                 tid_data->state = IWL_AGG_OFF;
1298                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1299                 break;
1300
1301         default:
1302                 break;
1303         }
1304 }
1305
1306 #ifdef CONFIG_IWLWIFI_DEBUG
1307 const char *iwl_mvm_get_tx_fail_reason(u32 status)
1308 {
1309 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
1310 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
1311
1312         switch (status & TX_STATUS_MSK) {
1313         case TX_STATUS_SUCCESS:
1314                 return "SUCCESS";
1315         TX_STATUS_POSTPONE(DELAY);
1316         TX_STATUS_POSTPONE(FEW_BYTES);
1317         TX_STATUS_POSTPONE(BT_PRIO);
1318         TX_STATUS_POSTPONE(QUIET_PERIOD);
1319         TX_STATUS_POSTPONE(CALC_TTAK);
1320         TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
1321         TX_STATUS_FAIL(SHORT_LIMIT);
1322         TX_STATUS_FAIL(LONG_LIMIT);
1323         TX_STATUS_FAIL(UNDERRUN);
1324         TX_STATUS_FAIL(DRAIN_FLOW);
1325         TX_STATUS_FAIL(RFKILL_FLUSH);
1326         TX_STATUS_FAIL(LIFE_EXPIRE);
1327         TX_STATUS_FAIL(DEST_PS);
1328         TX_STATUS_FAIL(HOST_ABORTED);
1329         TX_STATUS_FAIL(BT_RETRY);
1330         TX_STATUS_FAIL(STA_INVALID);
1331         TX_STATUS_FAIL(FRAG_DROPPED);
1332         TX_STATUS_FAIL(TID_DISABLE);
1333         TX_STATUS_FAIL(FIFO_FLUSHED);
1334         TX_STATUS_FAIL(SMALL_CF_POLL);
1335         TX_STATUS_FAIL(FW_DROP);
1336         TX_STATUS_FAIL(STA_COLOR_MISMATCH);
1337         }
1338
1339         return "UNKNOWN";
1340
1341 #undef TX_STATUS_FAIL
1342 #undef TX_STATUS_POSTPONE
1343 }
1344 #endif /* CONFIG_IWLWIFI_DEBUG */
1345
1346 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags,
1347                                enum nl80211_band band,
1348                                struct ieee80211_tx_rate *r)
1349 {
1350         if (rate_n_flags & RATE_HT_MCS_GF_MSK)
1351                 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
1352         switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
1353         case RATE_MCS_CHAN_WIDTH_20:
1354                 break;
1355         case RATE_MCS_CHAN_WIDTH_40:
1356                 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
1357                 break;
1358         case RATE_MCS_CHAN_WIDTH_80:
1359                 r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH;
1360                 break;
1361         case RATE_MCS_CHAN_WIDTH_160:
1362                 r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH;
1363                 break;
1364         }
1365         if (rate_n_flags & RATE_MCS_SGI_MSK)
1366                 r->flags |= IEEE80211_TX_RC_SHORT_GI;
1367         if (rate_n_flags & RATE_MCS_HT_MSK) {
1368                 r->flags |= IEEE80211_TX_RC_MCS;
1369                 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
1370         } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
1371                 ieee80211_rate_set_vht(
1372                         r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK,
1373                         ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
1374                                                 RATE_VHT_MCS_NSS_POS) + 1);
1375                 r->flags |= IEEE80211_TX_RC_VHT_MCS;
1376         } else {
1377                 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
1378                                                              band);
1379         }
1380 }
1381
1382 /**
1383  * translate ucode response to mac80211 tx status control values
1384  */
1385 static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags,
1386                                         struct ieee80211_tx_info *info)
1387 {
1388         struct ieee80211_tx_rate *r = &info->status.rates[0];
1389
1390         info->status.antenna =
1391                 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
1392         iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r);
1393 }
1394
1395 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm,
1396                                             u32 status)
1397 {
1398         struct iwl_fw_dbg_trigger_tlv *trig;
1399         struct iwl_fw_dbg_trigger_tx_status *status_trig;
1400         int i;
1401
1402         trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL,
1403                                      FW_DBG_TRIGGER_TX_STATUS);
1404         if (!trig)
1405                 return;
1406
1407         status_trig = (void *)trig->data;
1408
1409         for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) {
1410                 /* don't collect on status 0 */
1411                 if (!status_trig->statuses[i].status)
1412                         break;
1413
1414                 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK))
1415                         continue;
1416
1417                 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
1418                                         "Tx status %d was received",
1419                                         status & TX_STATUS_MSK);
1420                 break;
1421         }
1422 }
1423
1424 /**
1425  * iwl_mvm_get_scd_ssn - returns the SSN of the SCD
1426  * @tx_resp: the Tx response from the fw (agg or non-agg)
1427  *
1428  * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since
1429  * it can't know that everything will go well until the end of the AMPDU, it
1430  * can't know in advance the number of MPDUs that will be sent in the current
1431  * batch. This is why it writes the agg Tx response while it fetches the MPDUs.
1432  * Hence, it can't know in advance what the SSN of the SCD will be at the end
1433  * of the batch. This is why the SSN of the SCD is written at the end of the
1434  * whole struct at a variable offset. This function knows how to cope with the
1435  * variable offset and returns the SSN of the SCD.
1436  */
1437 static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm,
1438                                       struct iwl_mvm_tx_resp *tx_resp)
1439 {
1440         return le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) +
1441                             tx_resp->frame_count) & 0xfff;
1442 }
1443
1444 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm,
1445                                      struct iwl_rx_packet *pkt)
1446 {
1447         struct ieee80211_sta *sta;
1448         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1449         int txq_id = SEQ_TO_QUEUE(sequence);
1450         /* struct iwl_mvm_tx_resp_v3 is almost the same */
1451         struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1452         int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1453         int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1454         struct agg_tx_status *agg_status =
1455                 iwl_mvm_get_agg_status(mvm, tx_resp);
1456         u32 status = le16_to_cpu(agg_status->status);
1457         u16 ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp);
1458         struct sk_buff_head skbs;
1459         u8 skb_freed = 0;
1460         u8 lq_color;
1461         u16 next_reclaimed, seq_ctl;
1462         bool is_ndp = false;
1463
1464         __skb_queue_head_init(&skbs);
1465
1466         if (iwl_mvm_has_new_tx_api(mvm))
1467                 txq_id = le16_to_cpu(tx_resp->tx_queue);
1468
1469         seq_ctl = le16_to_cpu(tx_resp->seq_ctl);
1470
1471         /* we can free until ssn % q.n_bd not inclusive */
1472         iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs);
1473
1474         while (!skb_queue_empty(&skbs)) {
1475                 struct sk_buff *skb = __skb_dequeue(&skbs);
1476                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1477                 struct ieee80211_hdr *hdr = (void *)skb->data;
1478                 bool flushed = false;
1479
1480                 skb_freed++;
1481
1482                 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1483
1484                 memset(&info->status, 0, sizeof(info->status));
1485
1486                 /* inform mac80211 about what happened with the frame */
1487                 switch (status & TX_STATUS_MSK) {
1488                 case TX_STATUS_SUCCESS:
1489                 case TX_STATUS_DIRECT_DONE:
1490                         info->flags |= IEEE80211_TX_STAT_ACK;
1491                         break;
1492                 case TX_STATUS_FAIL_FIFO_FLUSHED:
1493                 case TX_STATUS_FAIL_DRAIN_FLOW:
1494                         flushed = true;
1495                         break;
1496                 case TX_STATUS_FAIL_DEST_PS:
1497                         /* the FW should have stopped the queue and not
1498                          * return this status
1499                          */
1500                         WARN_ON(1);
1501                         info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
1502                         break;
1503                 default:
1504                         break;
1505                 }
1506
1507                 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS &&
1508                     ieee80211_is_mgmt(hdr->frame_control))
1509                         iwl_mvm_toggle_tx_ant(mvm, &mvm->mgmt_last_antenna_idx);
1510
1511                 /*
1512                  * If we are freeing multiple frames, mark all the frames
1513                  * but the first one as acked, since they were acknowledged
1514                  * before
1515                  * */
1516                 if (skb_freed > 1)
1517                         info->flags |= IEEE80211_TX_STAT_ACK;
1518
1519                 iwl_mvm_tx_status_check_trigger(mvm, status);
1520
1521                 info->status.rates[0].count = tx_resp->failure_frame + 1;
1522                 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate),
1523                                             info);
1524                 info->status.status_driver_data[1] =
1525                         (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate);
1526
1527                 /* Single frame failure in an AMPDU queue => send BAR */
1528                 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
1529                     !(info->flags & IEEE80211_TX_STAT_ACK) &&
1530                     !(info->flags & IEEE80211_TX_STAT_TX_FILTERED) && !flushed)
1531                         info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1532                 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1533
1534                 /* W/A FW bug: seq_ctl is wrong upon failure / BAR frame */
1535                 if (ieee80211_is_back_req(hdr->frame_control))
1536                         seq_ctl = 0;
1537                 else if (status != TX_STATUS_SUCCESS)
1538                         seq_ctl = le16_to_cpu(hdr->seq_ctrl);
1539
1540                 if (unlikely(!seq_ctl)) {
1541                         struct ieee80211_hdr *hdr = (void *)skb->data;
1542
1543                         /*
1544                          * If it is an NDP, we can't update next_reclaim since
1545                          * its sequence control is 0. Note that for that same
1546                          * reason, NDPs are never sent to A-MPDU'able queues
1547                          * so that we can never have more than one freed frame
1548                          * for a single Tx resonse (see WARN_ON below).
1549                          */
1550                         if (ieee80211_is_qos_nullfunc(hdr->frame_control))
1551                                 is_ndp = true;
1552                 }
1553
1554                 /*
1555                  * TODO: this is not accurate if we are freeing more than one
1556                  * packet.
1557                  */
1558                 info->status.tx_time =
1559                         le16_to_cpu(tx_resp->wireless_media_time);
1560                 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1);
1561                 lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info);
1562                 info->status.status_driver_data[0] =
1563                         RS_DRV_DATA_PACK(lq_color, tx_resp->reduced_tpc);
1564
1565                 ieee80211_tx_status(mvm->hw, skb);
1566         }
1567
1568         /* This is an aggregation queue or might become one, so we use
1569          * the ssn since: ssn = wifi seq_num % 256.
1570          * The seq_ctl is the sequence control of the packet to which
1571          * this Tx response relates. But if there is a hole in the
1572          * bitmap of the BA we received, this Tx response may allow to
1573          * reclaim the hole and all the subsequent packets that were
1574          * already acked. In that case, seq_ctl != ssn, and the next
1575          * packet to be reclaimed will be ssn and not seq_ctl. In that
1576          * case, several packets will be reclaimed even if
1577          * frame_count = 1.
1578          *
1579          * The ssn is the index (% 256) of the latest packet that has
1580          * treated (acked / dropped) + 1.
1581          */
1582         next_reclaimed = ssn;
1583
1584         IWL_DEBUG_TX_REPLY(mvm,
1585                            "TXQ %d status %s (0x%08x)\n",
1586                            txq_id, iwl_mvm_get_tx_fail_reason(status), status);
1587
1588         IWL_DEBUG_TX_REPLY(mvm,
1589                            "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
1590                            le32_to_cpu(tx_resp->initial_rate),
1591                            tx_resp->failure_frame, SEQ_TO_INDEX(sequence),
1592                            ssn, next_reclaimed, seq_ctl);
1593
1594         rcu_read_lock();
1595
1596         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1597         /*
1598          * sta can't be NULL otherwise it'd mean that the sta has been freed in
1599          * the firmware while we still have packets for it in the Tx queues.
1600          */
1601         if (WARN_ON_ONCE(!sta))
1602                 goto out;
1603
1604         if (!IS_ERR(sta)) {
1605                 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1606
1607                 iwl_mvm_tx_airtime(mvm, mvmsta,
1608                                    le16_to_cpu(tx_resp->wireless_media_time));
1609
1610                 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS &&
1611                     mvmsta->sta_state < IEEE80211_STA_AUTHORIZED)
1612                         iwl_mvm_toggle_tx_ant(mvm, &mvmsta->tx_ant);
1613
1614                 if (sta->wme && tid != IWL_MGMT_TID) {
1615                         struct iwl_mvm_tid_data *tid_data =
1616                                 &mvmsta->tid_data[tid];
1617                         bool send_eosp_ndp = false;
1618
1619                         spin_lock_bh(&mvmsta->lock);
1620
1621                         if (!is_ndp) {
1622                                 tid_data->next_reclaimed = next_reclaimed;
1623                                 IWL_DEBUG_TX_REPLY(mvm,
1624                                                    "Next reclaimed packet:%d\n",
1625                                                    next_reclaimed);
1626                         } else {
1627                                 IWL_DEBUG_TX_REPLY(mvm,
1628                                                    "NDP - don't update next_reclaimed\n");
1629                         }
1630
1631                         iwl_mvm_check_ratid_empty(mvm, sta, tid);
1632
1633                         if (mvmsta->sleep_tx_count) {
1634                                 mvmsta->sleep_tx_count--;
1635                                 if (mvmsta->sleep_tx_count &&
1636                                     !iwl_mvm_tid_queued(mvm, tid_data)) {
1637                                         /*
1638                                          * The number of frames in the queue
1639                                          * dropped to 0 even if we sent less
1640                                          * frames than we thought we had on the
1641                                          * Tx queue.
1642                                          * This means we had holes in the BA
1643                                          * window that we just filled, ask
1644                                          * mac80211 to send EOSP since the
1645                                          * firmware won't know how to do that.
1646                                          * Send NDP and the firmware will send
1647                                          * EOSP notification that will trigger
1648                                          * a call to ieee80211_sta_eosp().
1649                                          */
1650                                         send_eosp_ndp = true;
1651                                 }
1652                         }
1653
1654                         spin_unlock_bh(&mvmsta->lock);
1655                         if (send_eosp_ndp) {
1656                                 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta,
1657                                         IEEE80211_FRAME_RELEASE_UAPSD,
1658                                         1, tid, false, false);
1659                                 mvmsta->sleep_tx_count = 0;
1660                                 ieee80211_send_eosp_nullfunc(sta, tid);
1661                         }
1662                 }
1663
1664                 if (mvmsta->next_status_eosp) {
1665                         mvmsta->next_status_eosp = false;
1666                         ieee80211_sta_eosp(sta);
1667                 }
1668         }
1669 out:
1670         rcu_read_unlock();
1671 }
1672
1673 #ifdef CONFIG_IWLWIFI_DEBUG
1674 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
1675 static const char *iwl_get_agg_tx_status(u16 status)
1676 {
1677         switch (status & AGG_TX_STATE_STATUS_MSK) {
1678         AGG_TX_STATE_(TRANSMITTED);
1679         AGG_TX_STATE_(UNDERRUN);
1680         AGG_TX_STATE_(BT_PRIO);
1681         AGG_TX_STATE_(FEW_BYTES);
1682         AGG_TX_STATE_(ABORT);
1683         AGG_TX_STATE_(TX_ON_AIR_DROP);
1684         AGG_TX_STATE_(LAST_SENT_TRY_CNT);
1685         AGG_TX_STATE_(LAST_SENT_BT_KILL);
1686         AGG_TX_STATE_(SCD_QUERY);
1687         AGG_TX_STATE_(TEST_BAD_CRC32);
1688         AGG_TX_STATE_(RESPONSE);
1689         AGG_TX_STATE_(DUMP_TX);
1690         AGG_TX_STATE_(DELAY_TX);
1691         }
1692
1693         return "UNKNOWN";
1694 }
1695
1696 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1697                                       struct iwl_rx_packet *pkt)
1698 {
1699         struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1700         struct agg_tx_status *frame_status =
1701                 iwl_mvm_get_agg_status(mvm, tx_resp);
1702         int i;
1703
1704         for (i = 0; i < tx_resp->frame_count; i++) {
1705                 u16 fstatus = le16_to_cpu(frame_status[i].status);
1706
1707                 IWL_DEBUG_TX_REPLY(mvm,
1708                                    "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
1709                                    iwl_get_agg_tx_status(fstatus),
1710                                    fstatus & AGG_TX_STATE_STATUS_MSK,
1711                                    (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >>
1712                                         AGG_TX_STATE_TRY_CNT_POS,
1713                                    le16_to_cpu(frame_status[i].sequence));
1714         }
1715 }
1716 #else
1717 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1718                                       struct iwl_rx_packet *pkt)
1719 {}
1720 #endif /* CONFIG_IWLWIFI_DEBUG */
1721
1722 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm,
1723                                   struct iwl_rx_packet *pkt)
1724 {
1725         struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1726         int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1727         int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1728         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1729         struct iwl_mvm_sta *mvmsta;
1730         int queue = SEQ_TO_QUEUE(sequence);
1731         struct ieee80211_sta *sta;
1732
1733         if (WARN_ON_ONCE(queue < IWL_MVM_DQA_MIN_DATA_QUEUE &&
1734                          (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)))
1735                 return;
1736
1737         iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt);
1738
1739         rcu_read_lock();
1740
1741         mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1742
1743         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1744         if (WARN_ON_ONCE(!sta || !sta->wme)) {
1745                 rcu_read_unlock();
1746                 return;
1747         }
1748
1749         if (!WARN_ON_ONCE(!mvmsta)) {
1750                 mvmsta->tid_data[tid].rate_n_flags =
1751                         le32_to_cpu(tx_resp->initial_rate);
1752                 mvmsta->tid_data[tid].tx_time =
1753                         le16_to_cpu(tx_resp->wireless_media_time);
1754                 mvmsta->tid_data[tid].lq_color =
1755                         TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info);
1756                 iwl_mvm_tx_airtime(mvm, mvmsta,
1757                                    le16_to_cpu(tx_resp->wireless_media_time));
1758         }
1759
1760         rcu_read_unlock();
1761 }
1762
1763 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1764 {
1765         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1766         struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1767
1768         if (tx_resp->frame_count == 1)
1769                 iwl_mvm_rx_tx_cmd_single(mvm, pkt);
1770         else
1771                 iwl_mvm_rx_tx_cmd_agg(mvm, pkt);
1772 }
1773
1774 static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid,
1775                                int txq, int index,
1776                                struct ieee80211_tx_info *ba_info, u32 rate)
1777 {
1778         struct sk_buff_head reclaimed_skbs;
1779         struct iwl_mvm_tid_data *tid_data;
1780         struct ieee80211_sta *sta;
1781         struct iwl_mvm_sta *mvmsta;
1782         struct sk_buff *skb;
1783         int freed;
1784
1785         if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT ||
1786                       tid > IWL_MAX_TID_COUNT,
1787                       "sta_id %d tid %d", sta_id, tid))
1788                 return;
1789
1790         rcu_read_lock();
1791
1792         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1793
1794         /* Reclaiming frames for a station that has been deleted ? */
1795         if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
1796                 rcu_read_unlock();
1797                 return;
1798         }
1799
1800         mvmsta = iwl_mvm_sta_from_mac80211(sta);
1801         tid_data = &mvmsta->tid_data[tid];
1802
1803         if (tid_data->txq_id != txq) {
1804                 IWL_ERR(mvm,
1805                         "invalid BA notification: Q %d, tid %d\n",
1806                         tid_data->txq_id, tid);
1807                 rcu_read_unlock();
1808                 return;
1809         }
1810
1811         __skb_queue_head_init(&reclaimed_skbs);
1812
1813         /*
1814          * Release all TFDs before the SSN, i.e. all TFDs in front of
1815          * block-ack window (we assume that they've been successfully
1816          * transmitted ... if not, it's too late anyway).
1817          */
1818         iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs);
1819
1820         spin_lock_bh(&mvmsta->lock);
1821
1822         tid_data->next_reclaimed = index;
1823
1824         iwl_mvm_check_ratid_empty(mvm, sta, tid);
1825
1826         freed = 0;
1827
1828         /* pack lq color from tid_data along the reduced txp */
1829         ba_info->status.status_driver_data[0] =
1830                 RS_DRV_DATA_PACK(tid_data->lq_color,
1831                                  ba_info->status.status_driver_data[0]);
1832         ba_info->status.status_driver_data[1] = (void *)(uintptr_t)rate;
1833
1834         skb_queue_walk(&reclaimed_skbs, skb) {
1835                 struct ieee80211_hdr *hdr = (void *)skb->data;
1836                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1837
1838                 if (ieee80211_is_data_qos(hdr->frame_control))
1839                         freed++;
1840                 else
1841                         WARN_ON_ONCE(tid != IWL_MAX_TID_COUNT);
1842
1843                 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1844
1845                 memset(&info->status, 0, sizeof(info->status));
1846                 /* Packet was transmitted successfully, failures come as single
1847                  * frames because before failing a frame the firmware transmits
1848                  * it without aggregation at least once.
1849                  */
1850                 info->flags |= IEEE80211_TX_STAT_ACK;
1851
1852                 /* this is the first skb we deliver in this batch */
1853                 /* put the rate scaling data there */
1854                 if (freed == 1) {
1855                         info->flags |= IEEE80211_TX_STAT_AMPDU;
1856                         memcpy(&info->status, &ba_info->status,
1857                                sizeof(ba_info->status));
1858                         iwl_mvm_hwrate_to_tx_status(rate, info);
1859                 }
1860         }
1861
1862         spin_unlock_bh(&mvmsta->lock);
1863
1864         /* We got a BA notif with 0 acked or scd_ssn didn't progress which is
1865          * possible (i.e. first MPDU in the aggregation wasn't acked)
1866          * Still it's important to update RS about sent vs. acked.
1867          */
1868         if (skb_queue_empty(&reclaimed_skbs)) {
1869                 struct ieee80211_chanctx_conf *chanctx_conf = NULL;
1870
1871                 if (mvmsta->vif)
1872                         chanctx_conf =
1873                                 rcu_dereference(mvmsta->vif->chanctx_conf);
1874
1875                 if (WARN_ON_ONCE(!chanctx_conf))
1876                         goto out;
1877
1878                 ba_info->band = chanctx_conf->def.chan->band;
1879                 iwl_mvm_hwrate_to_tx_status(rate, ba_info);
1880
1881                 if (!iwl_mvm_has_tlc_offload(mvm)) {
1882                         IWL_DEBUG_TX_REPLY(mvm,
1883                                            "No reclaim. Update rs directly\n");
1884                         iwl_mvm_rs_tx_status(mvm, sta, tid, ba_info, false);
1885                 }
1886         }
1887
1888 out:
1889         rcu_read_unlock();
1890
1891         while (!skb_queue_empty(&reclaimed_skbs)) {
1892                 skb = __skb_dequeue(&reclaimed_skbs);
1893                 ieee80211_tx_status(mvm->hw, skb);
1894         }
1895 }
1896
1897 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1898 {
1899         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1900         int sta_id, tid, txq, index;
1901         struct ieee80211_tx_info ba_info = {};
1902         struct iwl_mvm_ba_notif *ba_notif;
1903         struct iwl_mvm_tid_data *tid_data;
1904         struct iwl_mvm_sta *mvmsta;
1905
1906         ba_info.flags = IEEE80211_TX_STAT_AMPDU;
1907
1908         if (iwl_mvm_has_new_tx_api(mvm)) {
1909                 struct iwl_mvm_compressed_ba_notif *ba_res =
1910                         (void *)pkt->data;
1911                 u8 lq_color = TX_RES_RATE_TABLE_COL_GET(ba_res->tlc_rate_info);
1912                 int i;
1913
1914                 sta_id = ba_res->sta_id;
1915                 ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done);
1916                 ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed);
1917                 ba_info.status.tx_time =
1918                         (u16)le32_to_cpu(ba_res->wireless_time);
1919                 ba_info.status.status_driver_data[0] =
1920                         (void *)(uintptr_t)ba_res->reduced_txp;
1921
1922                 if (!le16_to_cpu(ba_res->tfd_cnt))
1923                         goto out;
1924
1925                 rcu_read_lock();
1926
1927                 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1928                 if (!mvmsta)
1929                         goto out_unlock;
1930
1931                 /* Free per TID */
1932                 for (i = 0; i < le16_to_cpu(ba_res->tfd_cnt); i++) {
1933                         struct iwl_mvm_compressed_ba_tfd *ba_tfd =
1934                                 &ba_res->tfd[i];
1935
1936                         tid = ba_tfd->tid;
1937                         if (tid == IWL_MGMT_TID)
1938                                 tid = IWL_MAX_TID_COUNT;
1939
1940                         mvmsta->tid_data[i].lq_color = lq_color;
1941                         iwl_mvm_tx_reclaim(mvm, sta_id, tid,
1942                                            (int)(le16_to_cpu(ba_tfd->q_num)),
1943                                            le16_to_cpu(ba_tfd->tfd_index),
1944                                            &ba_info,
1945                                            le32_to_cpu(ba_res->tx_rate));
1946                 }
1947
1948                 iwl_mvm_tx_airtime(mvm, mvmsta,
1949                                    le32_to_cpu(ba_res->wireless_time));
1950 out_unlock:
1951                 rcu_read_unlock();
1952 out:
1953                 IWL_DEBUG_TX_REPLY(mvm,
1954                                    "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n",
1955                                    sta_id, le32_to_cpu(ba_res->flags),
1956                                    le16_to_cpu(ba_res->txed),
1957                                    le16_to_cpu(ba_res->done));
1958                 return;
1959         }
1960
1961         ba_notif = (void *)pkt->data;
1962         sta_id = ba_notif->sta_id;
1963         tid = ba_notif->tid;
1964         /* "flow" corresponds to Tx queue */
1965         txq = le16_to_cpu(ba_notif->scd_flow);
1966         /* "ssn" is start of block-ack Tx window, corresponds to index
1967          * (in Tx queue's circular buffer) of first TFD/frame in window */
1968         index = le16_to_cpu(ba_notif->scd_ssn);
1969
1970         rcu_read_lock();
1971         mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1972         if (WARN_ON_ONCE(!mvmsta)) {
1973                 rcu_read_unlock();
1974                 return;
1975         }
1976
1977         tid_data = &mvmsta->tid_data[tid];
1978
1979         ba_info.status.ampdu_ack_len = ba_notif->txed_2_done;
1980         ba_info.status.ampdu_len = ba_notif->txed;
1981         ba_info.status.tx_time = tid_data->tx_time;
1982         ba_info.status.status_driver_data[0] =
1983                 (void *)(uintptr_t)ba_notif->reduced_txp;
1984
1985         rcu_read_unlock();
1986
1987         iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info,
1988                            tid_data->rate_n_flags);
1989
1990         IWL_DEBUG_TX_REPLY(mvm,
1991                            "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
1992                            ba_notif->sta_addr, ba_notif->sta_id);
1993
1994         IWL_DEBUG_TX_REPLY(mvm,
1995                            "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
1996                            ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl),
1997                            le64_to_cpu(ba_notif->bitmap), txq, index,
1998                            ba_notif->txed, ba_notif->txed_2_done);
1999
2000         IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n",
2001                            ba_notif->reduced_txp);
2002 }
2003
2004 /*
2005  * Note that there are transports that buffer frames before they reach
2006  * the firmware. This means that after flush_tx_path is called, the
2007  * queue might not be empty. The race-free way to handle this is to:
2008  * 1) set the station as draining
2009  * 2) flush the Tx path
2010  * 3) wait for the transport queues to be empty
2011  */
2012 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, u32 flags)
2013 {
2014         int ret;
2015         struct iwl_tx_path_flush_cmd_v1 flush_cmd = {
2016                 .queues_ctl = cpu_to_le32(tfd_msk),
2017                 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH),
2018         };
2019
2020         WARN_ON(iwl_mvm_has_new_tx_api(mvm));
2021
2022         ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags,
2023                                    sizeof(flush_cmd), &flush_cmd);
2024         if (ret)
2025                 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
2026         return ret;
2027 }
2028
2029 int iwl_mvm_flush_sta_tids(struct iwl_mvm *mvm, u32 sta_id,
2030                            u16 tids, u32 flags)
2031 {
2032         int ret;
2033         struct iwl_tx_path_flush_cmd flush_cmd = {
2034                 .sta_id = cpu_to_le32(sta_id),
2035                 .tid_mask = cpu_to_le16(tids),
2036         };
2037
2038         WARN_ON(!iwl_mvm_has_new_tx_api(mvm));
2039
2040         ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags,
2041                                    sizeof(flush_cmd), &flush_cmd);
2042         if (ret)
2043                 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
2044         return ret;
2045 }
2046
2047 int iwl_mvm_flush_sta(struct iwl_mvm *mvm, void *sta, bool internal, u32 flags)
2048 {
2049         struct iwl_mvm_int_sta *int_sta = sta;
2050         struct iwl_mvm_sta *mvm_sta = sta;
2051
2052         BUILD_BUG_ON(offsetof(struct iwl_mvm_int_sta, sta_id) !=
2053                      offsetof(struct iwl_mvm_sta, sta_id));
2054
2055         if (iwl_mvm_has_new_tx_api(mvm))
2056                 return iwl_mvm_flush_sta_tids(mvm, mvm_sta->sta_id,
2057                                               0xffff, flags);
2058
2059         if (internal)
2060                 return iwl_mvm_flush_tx_path(mvm, int_sta->tfd_queue_msk,
2061                                              flags);
2062
2063         return iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, flags);
2064 }