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.
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  17  * This program is distributed in the hope that it will be useful, but
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  20  * General Public License for more details.
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  23  * in the file called COPYING.
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  27  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
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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,
  58  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  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         /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
 345         if (info->band == NL80211_BAND_5GHZ)
 346                 rate_idx += IWL_FIRST_OFDM_RATE;
 347
 348         /* For 2.4 GHZ band, check that there is no need to remap */
 349         BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
 350
 351         /* Get PLCP rate for tx_cmd->rate_n_flags */
 352         rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(rate_idx);
 353
 354         /* Set CCK flag as needed */
 355         if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
 356                 rate_flags |= RATE_MCS_CCK_MSK;
 357
 358         return (u32)rate_plcp | rate_flags;
 359 }
 360
 361 static u32 iwl_mvm_get_tx_rate_n_flags(struct iwl_mvm *mvm,
 362                                        struct ieee80211_tx_info *info,
 363                                        struct ieee80211_sta *sta, __le16 fc)
 364 {
 365         return iwl_mvm_get_tx_rate(mvm, info, sta) |
 366                 iwl_mvm_get_tx_ant(mvm, info, sta, fc);
 367 }
 368
 369 /*
 370  * Sets the fields in the Tx cmd that are rate related
 371  */
 372 void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd,
 373                             struct ieee80211_tx_info *info,
 374                             struct ieee80211_sta *sta, __le16 fc)
 375 {
 376         /* Set retry limit on RTS packets */
 377         tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT;
 378
 379         /* Set retry limit on DATA packets and Probe Responses*/
 380         if (ieee80211_is_probe_resp(fc)) {
 381                 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT;
 382                 tx_cmd->rts_retry_limit =
 383                         min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit);
 384         } else if (ieee80211_is_back_req(fc)) {
 385                 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT;
 386         } else {
 387                 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY;
 388         }
 389
 390         /*
 391          * for data packets, rate info comes from the table inside the fw. This
 392          * table is controlled by LINK_QUALITY commands
 393          */
 394
 395         if (ieee80211_is_data(fc) && sta) {
 396                 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 397
 398                 if (mvmsta->sta_state >= IEEE80211_STA_AUTHORIZED) {
 399                         tx_cmd->initial_rate_index = 0;
 400                         tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE);
 401                         return;
 402                 }
 403         } else if (ieee80211_is_back_req(fc)) {
 404                 tx_cmd->tx_flags |=
 405                         cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR);
 406         }
 407
 408         /* Set the rate in the TX cmd */
 409         tx_cmd->rate_n_flags =
 410                 cpu_to_le32(iwl_mvm_get_tx_rate_n_flags(mvm, info, sta, fc));
 411 }
 412
 413 static inline void iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info *info,
 414                                          u8 *crypto_hdr)
 415 {
 416         struct ieee80211_key_conf *keyconf = info->control.hw_key;
 417         u64 pn;
 418
 419         pn = atomic64_inc_return(&keyconf->tx_pn);
 420         crypto_hdr[0] = pn;
 421         crypto_hdr[2] = 0;
 422         crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6);
 423         crypto_hdr[1] = pn >> 8;
 424         crypto_hdr[4] = pn >> 16;
 425         crypto_hdr[5] = pn >> 24;
 426         crypto_hdr[6] = pn >> 32;
 427         crypto_hdr[7] = pn >> 40;
 428 }
 429
 430 /*
 431  * Sets the fields in the Tx cmd that are crypto related
 432  */
 433 static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm,
 434                                       struct ieee80211_tx_info *info,
 435                                       struct iwl_tx_cmd *tx_cmd,
 436                                       struct sk_buff *skb_frag,
 437                                       int hdrlen)
 438 {
 439         struct ieee80211_key_conf *keyconf = info->control.hw_key;
 440         u8 *crypto_hdr = skb_frag->data + hdrlen;
 441         enum iwl_tx_cmd_sec_ctrl type = TX_CMD_SEC_CCM;
 442         u64 pn;
 443
 444         switch (keyconf->cipher) {
 445         case WLAN_CIPHER_SUITE_CCMP:
 446                 iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd);
 447                 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr);
 448                 break;
 449
 450         case WLAN_CIPHER_SUITE_TKIP:
 451                 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
 452                 pn = atomic64_inc_return(&keyconf->tx_pn);
 453                 ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn);
 454                 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
 455                 break;
 456
 457         case WLAN_CIPHER_SUITE_WEP104:
 458                 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
 459                 /* fall through */
 460         case WLAN_CIPHER_SUITE_WEP40:
 461                 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP |
 462                         ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) &
 463                           TX_CMD_SEC_WEP_KEY_IDX_MSK);
 464
 465                 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
 466                 break;
 467         case WLAN_CIPHER_SUITE_GCMP:
 468         case WLAN_CIPHER_SUITE_GCMP_256:
 469                 type = TX_CMD_SEC_GCMP;
 470                 /* Fall through */
 471         case WLAN_CIPHER_SUITE_CCMP_256:
 472                 /* TODO: Taking the key from the table might introduce a race
 473                  * when PTK rekeying is done, having an old packets with a PN
 474                  * based on the old key but the message encrypted with a new
 475                  * one.
 476                  * Need to handle this.
 477                  */
 478                 tx_cmd->sec_ctl |= type | TX_CMD_SEC_KEY_FROM_TABLE;
 479                 tx_cmd->key[0] = keyconf->hw_key_idx;
 480                 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr);
 481                 break;
 482         default:
 483                 tx_cmd->sec_ctl |= TX_CMD_SEC_EXT;
 484         }
 485 }
 486
 487 /*
 488  * Allocates and sets the Tx cmd the driver data pointers in the skb
 489  */
 490 static struct iwl_device_tx_cmd *
 491 iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb,
 492                       struct ieee80211_tx_info *info, int hdrlen,
 493                       struct ieee80211_sta *sta, u8 sta_id)
 494 {
 495         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 496         struct iwl_device_tx_cmd *dev_cmd;
 497         struct iwl_tx_cmd *tx_cmd;
 498
 499         dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans);
 500
 501         if (unlikely(!dev_cmd))
 502                 return NULL;
 503
 504         dev_cmd->hdr.cmd = TX_CMD;
 505
 506         if (iwl_mvm_has_new_tx_api(mvm)) {
 507                 u16 offload_assist = 0;
 508                 u32 rate_n_flags = 0;
 509                 u16 flags = 0;
 510                 struct iwl_mvm_sta *mvmsta = sta ?
 511                         iwl_mvm_sta_from_mac80211(sta) : NULL;
 512
 513                 if (ieee80211_is_data_qos(hdr->frame_control)) {
 514                         u8 *qc = ieee80211_get_qos_ctl(hdr);
 515
 516                         if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT)
 517                                 offload_assist |= BIT(TX_CMD_OFFLD_AMSDU);
 518                 }
 519
 520                 offload_assist = iwl_mvm_tx_csum(mvm, skb, hdr, info,
 521                                                  offload_assist);
 522
 523                 /* padding is inserted later in transport */
 524                 if (ieee80211_hdrlen(hdr->frame_control) % 4 &&
 525                     !(offload_assist & BIT(TX_CMD_OFFLD_AMSDU)))
 526                         offload_assist |= BIT(TX_CMD_OFFLD_PAD);
 527
 528                 if (!info->control.hw_key)
 529                         flags |= IWL_TX_FLAGS_ENCRYPT_DIS;
 530
 531                 /*
 532                  * For data packets rate info comes from the fw. Only
 533                  * set rate/antenna during connection establishment or in case
 534                  * no station is given.
 535                  */
 536                 if (!sta || !ieee80211_is_data(hdr->frame_control) ||
 537                     mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) {
 538                         flags |= IWL_TX_FLAGS_CMD_RATE;
 539                         rate_n_flags =
 540                                 iwl_mvm_get_tx_rate_n_flags(mvm, info, sta,
 541                                                             hdr->frame_control);
 542                 }
 543
 544                 if (mvm->trans->trans_cfg->device_family >=
 545                     IWL_DEVICE_FAMILY_22560) {
 546                         struct iwl_tx_cmd_gen3 *cmd = (void *)dev_cmd->payload;
 547
 548                         cmd->offload_assist |= cpu_to_le32(offload_assist);
 549
 550                         /* Total # bytes to be transmitted */
 551                         cmd->len = cpu_to_le16((u16)skb->len);
 552
 553                         /* Copy MAC header from skb into command buffer */
 554                         memcpy(cmd->hdr, hdr, hdrlen);
 555
 556                         cmd->flags = cpu_to_le16(flags);
 557                         cmd->rate_n_flags = cpu_to_le32(rate_n_flags);
 558                 } else {
 559                         struct iwl_tx_cmd_gen2 *cmd = (void *)dev_cmd->payload;
 560
 561                         cmd->offload_assist |= cpu_to_le16(offload_assist);
 562
 563                         /* Total # bytes to be transmitted */
 564                         cmd->len = cpu_to_le16((u16)skb->len);
 565
 566                         /* Copy MAC header from skb into command buffer */
 567                         memcpy(cmd->hdr, hdr, hdrlen);
 568
 569                         cmd->flags = cpu_to_le32(flags);
 570                         cmd->rate_n_flags = cpu_to_le32(rate_n_flags);
 571                 }
 572                 goto out;
 573         }
 574
 575         tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
 576
 577         if (info->control.hw_key)
 578                 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen);
 579
 580         iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id);
 581
 582         iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control);
 583
 584         /* Copy MAC header from skb into command buffer */
 585         memcpy(tx_cmd->hdr, hdr, hdrlen);
 586
 587 out:
 588         return dev_cmd;
 589 }
 590
 591 static void iwl_mvm_skb_prepare_status(struct sk_buff *skb,
 592                                        struct iwl_device_tx_cmd *cmd)
 593 {
 594         struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb);
 595
 596         memset(&skb_info->status, 0, sizeof(skb_info->status));
 597         memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data));
 598
 599         skb_info->driver_data[1] = cmd;
 600 }
 601
 602 static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm,
 603                                       struct ieee80211_tx_info *info,
 604                                       struct ieee80211_hdr *hdr)
 605 {
 606         struct iwl_mvm_vif *mvmvif =
 607                 iwl_mvm_vif_from_mac80211(info->control.vif);
 608         __le16 fc = hdr->frame_control;
 609
 610         switch (info->control.vif->type) {
 611         case NL80211_IFTYPE_AP:
 612         case NL80211_IFTYPE_ADHOC:
 613                 /*
 614                  * Non-bufferable frames use the broadcast station, thus they
 615                  * use the probe queue.
 616                  * Also take care of the case where we send a deauth to a
 617                  * station that we don't have, or similarly an association
 618                  * response (with non-success status) for a station we can't
 619                  * accept.
 620                  * Also, disassociate frames might happen, particular with
 621                  * reason 7 ("Class 3 frame received from nonassociated STA").
 622                  */
 623                 if (ieee80211_is_mgmt(fc) &&
 624                     (!ieee80211_is_bufferable_mmpdu(fc) ||
 625                      ieee80211_is_deauth(fc) || ieee80211_is_disassoc(fc)))
 626                         return mvm->probe_queue;
 627
 628                 if (!ieee80211_has_order(fc) && !ieee80211_is_probe_req(fc) &&
 629                     is_multicast_ether_addr(hdr->addr1))
 630                         return mvmvif->cab_queue;
 631
 632                 WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC,
 633                           "fc=0x%02x", le16_to_cpu(fc));
 634                 return mvm->probe_queue;
 635         case NL80211_IFTYPE_P2P_DEVICE:
 636                 if (ieee80211_is_mgmt(fc))
 637                         return mvm->p2p_dev_queue;
 638
 639                 WARN_ON_ONCE(1);
 640                 return mvm->p2p_dev_queue;
 641         default:
 642                 WARN_ONCE(1, "Not a ctrl vif, no available queue\n");
 643                 return -1;
 644         }
 645 }
 646
 647 static void iwl_mvm_probe_resp_set_noa(struct iwl_mvm *mvm,
 648                                        struct sk_buff *skb)
 649 {
 650         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 651         struct iwl_mvm_vif *mvmvif =
 652                 iwl_mvm_vif_from_mac80211(info->control.vif);
 653         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
 654         int base_len = (u8 *)mgmt->u.probe_resp.variable - (u8 *)mgmt;
 655         struct iwl_probe_resp_data *resp_data;
 656         u8 *ie, *pos;
 657         u8 match[] = {
 658                 (WLAN_OUI_WFA >> 16) & 0xff,
 659                 (WLAN_OUI_WFA >> 8) & 0xff,
 660                 WLAN_OUI_WFA & 0xff,
 661                 WLAN_OUI_TYPE_WFA_P2P,
 662         };
 663
 664         rcu_read_lock();
 665
 666         resp_data = rcu_dereference(mvmvif->probe_resp_data);
 667         if (!resp_data)
 668                 goto out;
 669
 670         if (!resp_data->notif.noa_active)
 671                 goto out;
 672
 673         ie = (u8 *)cfg80211_find_ie_match(WLAN_EID_VENDOR_SPECIFIC,
 674                                           mgmt->u.probe_resp.variable,
 675                                           skb->len - base_len,
 676                                           match, 4, 2);
 677         if (!ie) {
 678                 IWL_DEBUG_TX(mvm, "probe resp doesn't have P2P IE\n");
 679                 goto out;
 680         }
 681
 682         if (skb_tailroom(skb) < resp_data->noa_len) {
 683                 if (pskb_expand_head(skb, 0, resp_data->noa_len, GFP_ATOMIC)) {
 684                         IWL_ERR(mvm,
 685                                 "Failed to reallocate probe resp\n");
 686                         goto out;
 687                 }
 688         }
 689
 690         pos = skb_put(skb, resp_data->noa_len);
 691
 692         *pos++ = WLAN_EID_VENDOR_SPECIFIC;
 693         /* Set length of IE body (not including ID and length itself) */
 694         *pos++ = resp_data->noa_len - 2;
 695         *pos++ = (WLAN_OUI_WFA >> 16) & 0xff;
 696         *pos++ = (WLAN_OUI_WFA >> 8) & 0xff;
 697         *pos++ = WLAN_OUI_WFA & 0xff;
 698         *pos++ = WLAN_OUI_TYPE_WFA_P2P;
 699
 700         memcpy(pos, &resp_data->notif.noa_attr,
 701                resp_data->noa_len - sizeof(struct ieee80211_vendor_ie));
 702
 703 out:
 704         rcu_read_unlock();
 705 }
 706
 707 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb)
 708 {
 709         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 710         struct ieee80211_tx_info info;
 711         struct iwl_device_tx_cmd *dev_cmd;
 712         u8 sta_id;
 713         int hdrlen = ieee80211_hdrlen(hdr->frame_control);
 714         __le16 fc = hdr->frame_control;
 715         bool offchannel = IEEE80211_SKB_CB(skb)->flags &
 716                 IEEE80211_TX_CTL_TX_OFFCHAN;
 717         int queue = -1;
 718
 719         if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc))
 720                 return -1;
 721
 722         memcpy(&info, skb->cb, sizeof(info));
 723
 724         if (WARN_ON_ONCE(skb->len > IEEE80211_MAX_DATA_LEN + hdrlen))
 725                 return -1;
 726
 727         if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU))
 728                 return -1;
 729
 730         if (info.control.vif) {
 731                 struct iwl_mvm_vif *mvmvif =
 732                         iwl_mvm_vif_from_mac80211(info.control.vif);
 733
 734                 if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE ||
 735                     info.control.vif->type == NL80211_IFTYPE_AP ||
 736                     info.control.vif->type == NL80211_IFTYPE_ADHOC) {
 737                         if (!ieee80211_is_data(hdr->frame_control))
 738                                 sta_id = mvmvif->bcast_sta.sta_id;
 739                         else
 740                                 sta_id = mvmvif->mcast_sta.sta_id;
 741
 742                         queue = iwl_mvm_get_ctrl_vif_queue(mvm, &info, hdr);
 743                 } else if (info.control.vif->type == NL80211_IFTYPE_MONITOR) {
 744                         queue = mvm->snif_queue;
 745                         sta_id = mvm->snif_sta.sta_id;
 746                 } else if (info.control.vif->type == NL80211_IFTYPE_STATION &&
 747                            offchannel) {
 748                         /*
 749                          * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets
 750                          * that can be used in 2 different types of vifs, P2P &
 751                          * STATION.
 752                          * P2P uses the offchannel queue.
 753                          * STATION (HS2.0) uses the auxiliary context of the FW,
 754                          * and hence needs to be sent on the aux queue.
 755                          */
 756                         sta_id = mvm->aux_sta.sta_id;
 757                         queue = mvm->aux_queue;
 758                 }
 759         }
 760
 761         if (queue < 0) {
 762                 IWL_ERR(mvm, "No queue was found. Dropping TX\n");
 763                 return -1;
 764         }
 765
 766         if (unlikely(ieee80211_is_probe_resp(fc)))
 767                 iwl_mvm_probe_resp_set_noa(mvm, skb);
 768
 769         IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue);
 770
 771         dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id);
 772         if (!dev_cmd)
 773                 return -1;
 774
 775         /* From now on, we cannot access info->control */
 776         iwl_mvm_skb_prepare_status(skb, dev_cmd);
 777
 778         if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) {
 779                 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
 780                 return -1;
 781         }
 782
 783         return 0;
 784 }
 785
 786 unsigned int iwl_mvm_max_amsdu_size(struct iwl_mvm *mvm,
 787                                     struct ieee80211_sta *sta, unsigned int tid)
 788 {
 789         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 790         enum nl80211_band band = mvmsta->vif->bss_conf.chandef.chan->band;
 791         u8 ac = tid_to_mac80211_ac[tid];
 792         unsigned int txf;
 793         int lmac = IWL_LMAC_24G_INDEX;
 794
 795         if (iwl_mvm_is_cdb_supported(mvm) &&
 796             band == NL80211_BAND_5GHZ)
 797                 lmac = IWL_LMAC_5G_INDEX;
 798
 799         /* For HE redirect to trigger based fifos */
 800         if (sta->he_cap.has_he && !WARN_ON(!iwl_mvm_has_new_tx_api(mvm)))
 801                 ac += 4;
 802
 803         txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac);
 804
 805         /*
 806          * Don't send an AMSDU that will be longer than the TXF.
 807          * Add a security margin of 256 for the TX command + headers.
 808          * We also want to have the start of the next packet inside the
 809          * fifo to be able to send bursts.
 810          */
 811         return min_t(unsigned int, mvmsta->max_amsdu_len,
 812                      mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256);
 813 }
 814
 815 #ifdef CONFIG_INET
 816
 817 static int
 818 iwl_mvm_tx_tso_segment(struct sk_buff *skb, unsigned int num_subframes,
 819                        netdev_features_t netdev_flags,
 820                        struct sk_buff_head *mpdus_skb)
 821 {
 822         struct sk_buff *tmp, *next;
 823         struct ieee80211_hdr *hdr = (void *)skb->data;
 824         char cb[sizeof(skb->cb)];
 825         u16 i = 0;
 826         unsigned int tcp_payload_len;
 827         unsigned int mss = skb_shinfo(skb)->gso_size;
 828         bool ipv4 = (skb->protocol == htons(ETH_P_IP));
 829         bool qos = ieee80211_is_data_qos(hdr->frame_control);
 830         u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0;
 831
 832         skb_shinfo(skb)->gso_size = num_subframes * mss;
 833         memcpy(cb, skb->cb, sizeof(cb));
 834
 835         next = skb_gso_segment(skb, netdev_flags);
 836         skb_shinfo(skb)->gso_size = mss;
 837         if (WARN_ON_ONCE(IS_ERR(next)))
 838                 return -EINVAL;
 839         else if (next)
 840                 consume_skb(skb);
 841
 842         while (next) {
 843                 tmp = next;
 844                 next = tmp->next;
 845
 846                 memcpy(tmp->cb, cb, sizeof(tmp->cb));
 847                 /*
 848                  * Compute the length of all the data added for the A-MSDU.
 849                  * This will be used to compute the length to write in the TX
 850                  * command. We have: SNAP + IP + TCP for n -1 subframes and
 851                  * ETH header for n subframes.
 852                  */
 853                 tcp_payload_len = skb_tail_pointer(tmp) -
 854                         skb_transport_header(tmp) -
 855                         tcp_hdrlen(tmp) + tmp->data_len;
 856
 857                 if (ipv4)
 858                         ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes);
 859
 860                 if (tcp_payload_len > mss) {
 861                         skb_shinfo(tmp)->gso_size = mss;
 862                 } else {
 863                         if (qos) {
 864                                 u8 *qc;
 865
 866                                 if (ipv4)
 867                                         ip_send_check(ip_hdr(tmp));
 868
 869                                 qc = ieee80211_get_qos_ctl((void *)tmp->data);
 870                                 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
 871                         }
 872                         skb_shinfo(tmp)->gso_size = 0;
 873                 }
 874
 875                 tmp->prev = NULL;
 876                 tmp->next = NULL;
 877
 878                 __skb_queue_tail(mpdus_skb, tmp);
 879                 i++;
 880         }
 881
 882         return 0;
 883 }
 884
 885 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
 886                           struct ieee80211_tx_info *info,
 887                           struct ieee80211_sta *sta,
 888                           struct sk_buff_head *mpdus_skb)
 889 {
 890         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 891         struct ieee80211_hdr *hdr = (void *)skb->data;
 892         unsigned int mss = skb_shinfo(skb)->gso_size;
 893         unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len;
 894         u16 snap_ip_tcp, pad;
 895         netdev_features_t netdev_flags = NETIF_F_CSUM_MASK | NETIF_F_SG;
 896         u8 tid;
 897
 898         snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) +
 899                 tcp_hdrlen(skb);
 900
 901         if (!mvmsta->max_amsdu_len ||
 902             !ieee80211_is_data_qos(hdr->frame_control) ||
 903             !mvmsta->amsdu_enabled)
 904                 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
 905
 906         /*
 907          * Do not build AMSDU for IPv6 with extension headers.
 908          * ask stack to segment and checkum the generated MPDUs for us.
 909          */
 910         if (skb->protocol == htons(ETH_P_IPV6) &&
 911             ((struct ipv6hdr *)skb_network_header(skb))->nexthdr !=
 912             IPPROTO_TCP) {
 913                 netdev_flags &= ~NETIF_F_CSUM_MASK;
 914                 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
 915         }
 916
 917         tid = ieee80211_get_tid(hdr);
 918         if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
 919                 return -EINVAL;
 920
 921         /*
 922          * No need to lock amsdu_in_ampdu_allowed since it can't be modified
 923          * during an BA session.
 924          */
 925         if (info->flags & IEEE80211_TX_CTL_AMPDU &&
 926             !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed)
 927                 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
 928
 929         if (iwl_mvm_vif_low_latency(iwl_mvm_vif_from_mac80211(mvmsta->vif)) ||
 930             !(mvmsta->amsdu_enabled & BIT(tid)))
 931                 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
 932
 933         /*
 934          * Take the min of ieee80211 station and mvm station
 935          */
 936         max_amsdu_len =
 937                 min_t(unsigned int, sta->max_amsdu_len,
 938                       iwl_mvm_max_amsdu_size(mvm, sta, tid));
 939
 940         /*
 941          * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not
 942          * supported. This is a spec requirement (IEEE 802.11-2015
 943          * section 8.7.3 NOTE 3).
 944          */
 945         if (info->flags & IEEE80211_TX_CTL_AMPDU &&
 946             !sta->vht_cap.vht_supported)
 947                 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095);
 948
 949         /* Sub frame header + SNAP + IP header + TCP header + MSS */
 950         subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss;
 951         pad = (4 - subf_len) & 0x3;
 952
 953         /*
 954          * If we have N subframes in the A-MSDU, then the A-MSDU's size is
 955          * N * subf_len + (N - 1) * pad.
 956          */
 957         num_subframes = (max_amsdu_len + pad) / (subf_len + pad);
 958
 959         if (sta->max_amsdu_subframes &&
 960             num_subframes > sta->max_amsdu_subframes)
 961                 num_subframes = sta->max_amsdu_subframes;
 962
 963         tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
 964                 tcp_hdrlen(skb) + skb->data_len;
 965
 966         /*
 967          * Make sure we have enough TBs for the A-MSDU:
 968          *      2 for each subframe
 969          *      1 more for each fragment
 970          *      1 more for the potential data in the header
 971          */
 972         if ((num_subframes * 2 + skb_shinfo(skb)->nr_frags + 1) >
 973             mvm->trans->max_skb_frags)
 974                 num_subframes = 1;
 975
 976         if (num_subframes > 1)
 977                 *ieee80211_get_qos_ctl(hdr) |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
 978
 979         /* This skb fits in one single A-MSDU */
 980         if (num_subframes * mss >= tcp_payload_len) {
 981                 __skb_queue_tail(mpdus_skb, skb);
 982                 return 0;
 983         }
 984
 985         /*
 986          * Trick the segmentation function to make it
 987          * create SKBs that can fit into one A-MSDU.
 988          */
 989         return iwl_mvm_tx_tso_segment(skb, num_subframes, netdev_flags,
 990                                       mpdus_skb);
 991 }
 992 #else /* CONFIG_INET */
 993 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
 994                           struct ieee80211_tx_info *info,
 995                           struct ieee80211_sta *sta,
 996                           struct sk_buff_head *mpdus_skb)
 997 {
 998         /* Impossible to get TSO with CONFIG_INET */
 999         WARN_ON(1);
1000
1001         return -1;
1002 }
1003 #endif
1004
1005 /* Check if there are any timed-out TIDs on a given shared TXQ */
1006 static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id)
1007 {
1008         unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap;
1009         unsigned long now = jiffies;
1010         int tid;
1011
1012         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1013                 return false;
1014
1015         for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) {
1016                 if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] +
1017                                 IWL_MVM_DQA_QUEUE_TIMEOUT, now))
1018                         return true;
1019         }
1020
1021         return false;
1022 }
1023
1024 static void iwl_mvm_tx_airtime(struct iwl_mvm *mvm,
1025                                struct iwl_mvm_sta *mvmsta,
1026                                int airtime)
1027 {
1028         int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
1029         struct iwl_mvm_tcm_mac *mdata;
1030
1031         if (mac >= NUM_MAC_INDEX_DRIVER)
1032                 return;
1033
1034         mdata = &mvm->tcm.data[mac];
1035
1036         if (mvm->tcm.paused)
1037                 return;
1038
1039         if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD))
1040                 schedule_delayed_work(&mvm->tcm.work, 0);
1041
1042         mdata->tx.airtime += airtime;
1043 }
1044
1045 static int iwl_mvm_tx_pkt_queued(struct iwl_mvm *mvm,
1046                                  struct iwl_mvm_sta *mvmsta, int tid)
1047 {
1048         u32 ac = tid_to_mac80211_ac[tid];
1049         int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
1050         struct iwl_mvm_tcm_mac *mdata;
1051
1052         if (mac >= NUM_MAC_INDEX_DRIVER)
1053                 return -EINVAL;
1054
1055         mdata = &mvm->tcm.data[mac];
1056
1057         mdata->tx.pkts[ac]++;
1058
1059         return 0;
1060 }
1061
1062 /*
1063  * Sets the fields in the Tx cmd that are crypto related.
1064  *
1065  * This function must be called with BHs disabled.
1066  */
1067 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb,
1068                            struct ieee80211_tx_info *info,
1069                            struct ieee80211_sta *sta)
1070 {
1071         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1072         struct iwl_mvm_sta *mvmsta;
1073         struct iwl_device_tx_cmd *dev_cmd;
1074         __le16 fc;
1075         u16 seq_number = 0;
1076         u8 tid = IWL_MAX_TID_COUNT;
1077         u16 txq_id;
1078         bool is_ampdu = false;
1079         int hdrlen;
1080
1081         mvmsta = iwl_mvm_sta_from_mac80211(sta);
1082         fc = hdr->frame_control;
1083         hdrlen = ieee80211_hdrlen(fc);
1084
1085         if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc))
1086                 return -1;
1087
1088         if (WARN_ON_ONCE(!mvmsta))
1089                 return -1;
1090
1091         if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA))
1092                 return -1;
1093
1094         if (unlikely(ieee80211_is_probe_resp(fc)))
1095                 iwl_mvm_probe_resp_set_noa(mvm, skb);
1096
1097         dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen,
1098                                         sta, mvmsta->sta_id);
1099         if (!dev_cmd)
1100                 goto drop;
1101
1102         /*
1103          * we handle that entirely ourselves -- for uAPSD the firmware
1104          * will always send a notification, and for PS-Poll responses
1105          * we'll notify mac80211 when getting frame status
1106          */
1107         info->flags &= ~IEEE80211_TX_STATUS_EOSP;
1108
1109         spin_lock(&mvmsta->lock);
1110
1111         /* nullfunc frames should go to the MGMT queue regardless of QOS,
1112          * the condition of !ieee80211_is_qos_nullfunc(fc) keeps the default
1113          * assignment of MGMT TID
1114          */
1115         if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
1116                 tid = ieee80211_get_tid(hdr);
1117                 if (WARN_ONCE(tid >= IWL_MAX_TID_COUNT, "Invalid TID %d", tid))
1118                         goto drop_unlock_sta;
1119
1120                 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU;
1121                 if (WARN_ONCE(is_ampdu &&
1122                               mvmsta->tid_data[tid].state != IWL_AGG_ON,
1123                               "Invalid internal agg state %d for TID %d",
1124                                mvmsta->tid_data[tid].state, tid))
1125                         goto drop_unlock_sta;
1126
1127                 seq_number = mvmsta->tid_data[tid].seq_number;
1128                 seq_number &= IEEE80211_SCTL_SEQ;
1129
1130                 if (!iwl_mvm_has_new_tx_api(mvm)) {
1131                         struct iwl_tx_cmd *tx_cmd = (void *)dev_cmd->payload;
1132
1133                         hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
1134                         hdr->seq_ctrl |= cpu_to_le16(seq_number);
1135                         /* update the tx_cmd hdr as it was already copied */
1136                         tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl;
1137                 }
1138         } else if (ieee80211_is_data(fc) && !ieee80211_is_data_qos(fc)) {
1139                 tid = IWL_TID_NON_QOS;
1140         }
1141
1142         txq_id = mvmsta->tid_data[tid].txq_id;
1143
1144         WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
1145
1146         if (WARN_ONCE(txq_id == IWL_MVM_INVALID_QUEUE, "Invalid TXQ id")) {
1147                 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1148                 spin_unlock(&mvmsta->lock);
1149                 return -1;
1150         }
1151
1152         if (!iwl_mvm_has_new_tx_api(mvm)) {
1153                 /* Keep track of the time of the last frame for this RA/TID */
1154                 mvm->queue_info[txq_id].last_frame_time[tid] = jiffies;
1155
1156                 /*
1157                  * If we have timed-out TIDs - schedule the worker that will
1158                  * reconfig the queues and update them
1159                  *
1160                  * Note that the no lock is taken here in order to not serialize
1161                  * the TX flow. This isn't dangerous because scheduling
1162                  * mvm->add_stream_wk can't ruin the state, and if we DON'T
1163                  * schedule it due to some race condition then next TX we get
1164                  * here we will.
1165                  */
1166                 if (unlikely(mvm->queue_info[txq_id].status ==
1167                              IWL_MVM_QUEUE_SHARED &&
1168                              iwl_mvm_txq_should_update(mvm, txq_id)))
1169                         schedule_work(&mvm->add_stream_wk);
1170         }
1171
1172         IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x len %d\n",
1173                      mvmsta->sta_id, tid, txq_id,
1174                      IEEE80211_SEQ_TO_SN(seq_number), skb->len);
1175
1176         /* From now on, we cannot access info->control */
1177         iwl_mvm_skb_prepare_status(skb, dev_cmd);
1178
1179         if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id))
1180                 goto drop_unlock_sta;
1181
1182         if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc))
1183                 mvmsta->tid_data[tid].seq_number = seq_number + 0x10;
1184
1185         spin_unlock(&mvmsta->lock);
1186
1187         if (iwl_mvm_tx_pkt_queued(mvm, mvmsta,
1188                                   tid == IWL_MAX_TID_COUNT ? 0 : tid))
1189                 goto drop;
1190
1191         return 0;
1192
1193 drop_unlock_sta:
1194         iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1195         spin_unlock(&mvmsta->lock);
1196 drop:
1197         IWL_DEBUG_TX(mvm, "TX to [%d|%d] dropped\n", mvmsta->sta_id, tid);
1198         return -1;
1199 }
1200
1201 int iwl_mvm_tx_skb_sta(struct iwl_mvm *mvm, struct sk_buff *skb,
1202                        struct ieee80211_sta *sta)
1203 {
1204         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1205         struct ieee80211_tx_info info;
1206         struct sk_buff_head mpdus_skbs;
1207         unsigned int payload_len;
1208         int ret;
1209
1210         if (WARN_ON_ONCE(!mvmsta))
1211                 return -1;
1212
1213         if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA))
1214                 return -1;
1215
1216         memcpy(&info, skb->cb, sizeof(info));
1217
1218         if (!skb_is_gso(skb))
1219                 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1220
1221         payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
1222                 tcp_hdrlen(skb) + skb->data_len;
1223
1224         if (payload_len <= skb_shinfo(skb)->gso_size)
1225                 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1226
1227         __skb_queue_head_init(&mpdus_skbs);
1228
1229         ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs);
1230         if (ret)
1231                 return ret;
1232
1233         if (WARN_ON(skb_queue_empty(&mpdus_skbs)))
1234                 return ret;
1235
1236         while (!skb_queue_empty(&mpdus_skbs)) {
1237                 skb = __skb_dequeue(&mpdus_skbs);
1238
1239                 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1240                 if (ret) {
1241                         __skb_queue_purge(&mpdus_skbs);
1242                         return ret;
1243                 }
1244         }
1245
1246         return 0;
1247 }
1248
1249 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm,
1250                                       struct ieee80211_sta *sta, u8 tid)
1251 {
1252         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1253         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1254         struct ieee80211_vif *vif = mvmsta->vif;
1255         u16 normalized_ssn;
1256
1257         lockdep_assert_held(&mvmsta->lock);
1258
1259         if ((tid_data->state == IWL_AGG_ON ||
1260              tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) &&
1261             iwl_mvm_tid_queued(mvm, tid_data) == 0) {
1262                 /*
1263                  * Now that this aggregation or DQA queue is empty tell
1264                  * mac80211 so it knows we no longer have frames buffered for
1265                  * the station on this TID (for the TIM bitmap calculation.)
1266                  */
1267                 ieee80211_sta_set_buffered(sta, tid, false);
1268         }
1269
1270         /*
1271          * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
1272          * to align the wrap around of ssn so we compare relevant values.
1273          */
1274         normalized_ssn = tid_data->ssn;
1275         if (mvm->trans->trans_cfg->gen2)
1276                 normalized_ssn &= 0xff;
1277
1278         if (normalized_ssn != tid_data->next_reclaimed)
1279                 return;
1280
1281         switch (tid_data->state) {
1282         case IWL_EMPTYING_HW_QUEUE_ADDBA:
1283                 IWL_DEBUG_TX_QUEUES(mvm,
1284                                     "Can continue addBA flow ssn = next_recl = %d\n",
1285                                     tid_data->next_reclaimed);
1286                 tid_data->state = IWL_AGG_STARTING;
1287                 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1288                 break;
1289
1290         case IWL_EMPTYING_HW_QUEUE_DELBA:
1291                 IWL_DEBUG_TX_QUEUES(mvm,
1292                                     "Can continue DELBA flow ssn = next_recl = %d\n",
1293                                     tid_data->next_reclaimed);
1294                 tid_data->state = IWL_AGG_OFF;
1295                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1296                 break;
1297
1298         default:
1299                 break;
1300         }
1301 }
1302
1303 #ifdef CONFIG_IWLWIFI_DEBUG
1304 const char *iwl_mvm_get_tx_fail_reason(u32 status)
1305 {
1306 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
1307 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
1308
1309         switch (status & TX_STATUS_MSK) {
1310         case TX_STATUS_SUCCESS:
1311                 return "SUCCESS";
1312         TX_STATUS_POSTPONE(DELAY);
1313         TX_STATUS_POSTPONE(FEW_BYTES);
1314         TX_STATUS_POSTPONE(BT_PRIO);
1315         TX_STATUS_POSTPONE(QUIET_PERIOD);
1316         TX_STATUS_POSTPONE(CALC_TTAK);
1317         TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
1318         TX_STATUS_FAIL(SHORT_LIMIT);
1319         TX_STATUS_FAIL(LONG_LIMIT);
1320         TX_STATUS_FAIL(UNDERRUN);
1321         TX_STATUS_FAIL(DRAIN_FLOW);
1322         TX_STATUS_FAIL(RFKILL_FLUSH);
1323         TX_STATUS_FAIL(LIFE_EXPIRE);
1324         TX_STATUS_FAIL(DEST_PS);
1325         TX_STATUS_FAIL(HOST_ABORTED);
1326         TX_STATUS_FAIL(BT_RETRY);
1327         TX_STATUS_FAIL(STA_INVALID);
1328         TX_STATUS_FAIL(FRAG_DROPPED);
1329         TX_STATUS_FAIL(TID_DISABLE);
1330         TX_STATUS_FAIL(FIFO_FLUSHED);
1331         TX_STATUS_FAIL(SMALL_CF_POLL);
1332         TX_STATUS_FAIL(FW_DROP);
1333         TX_STATUS_FAIL(STA_COLOR_MISMATCH);
1334         }
1335
1336         return "UNKNOWN";
1337
1338 #undef TX_STATUS_FAIL
1339 #undef TX_STATUS_POSTPONE
1340 }
1341 #endif /* CONFIG_IWLWIFI_DEBUG */
1342
1343 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags,
1344                                enum nl80211_band band,
1345                                struct ieee80211_tx_rate *r)
1346 {
1347         if (rate_n_flags & RATE_HT_MCS_GF_MSK)
1348                 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
1349         switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
1350         case RATE_MCS_CHAN_WIDTH_20:
1351                 break;
1352         case RATE_MCS_CHAN_WIDTH_40:
1353                 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
1354                 break;
1355         case RATE_MCS_CHAN_WIDTH_80:
1356                 r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH;
1357                 break;
1358         case RATE_MCS_CHAN_WIDTH_160:
1359                 r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH;
1360                 break;
1361         }
1362         if (rate_n_flags & RATE_MCS_SGI_MSK)
1363                 r->flags |= IEEE80211_TX_RC_SHORT_GI;
1364         if (rate_n_flags & RATE_MCS_HT_MSK) {
1365                 r->flags |= IEEE80211_TX_RC_MCS;
1366                 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
1367         } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
1368                 ieee80211_rate_set_vht(
1369                         r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK,
1370                         ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
1371                                                 RATE_VHT_MCS_NSS_POS) + 1);
1372                 r->flags |= IEEE80211_TX_RC_VHT_MCS;
1373         } else {
1374                 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
1375                                                              band);
1376         }
1377 }
1378
1379 /**
1380  * translate ucode response to mac80211 tx status control values
1381  */
1382 static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags,
1383                                         struct ieee80211_tx_info *info)
1384 {
1385         struct ieee80211_tx_rate *r = &info->status.rates[0];
1386
1387         info->status.antenna =
1388                 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
1389         iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r);
1390 }
1391
1392 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm,
1393                                             u32 status)
1394 {
1395         struct iwl_fw_dbg_trigger_tlv *trig;
1396         struct iwl_fw_dbg_trigger_tx_status *status_trig;
1397         int i;
1398
1399         trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL,
1400                                      FW_DBG_TRIGGER_TX_STATUS);
1401         if (!trig)
1402                 return;
1403
1404         status_trig = (void *)trig->data;
1405
1406         for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) {
1407                 /* don't collect on status 0 */
1408                 if (!status_trig->statuses[i].status)
1409                         break;
1410
1411                 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK))
1412                         continue;
1413
1414                 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
1415                                         "Tx status %d was received",
1416                                         status & TX_STATUS_MSK);
1417                 break;
1418         }
1419 }
1420
1421 /**
1422  * iwl_mvm_get_scd_ssn - returns the SSN of the SCD
1423  * @tx_resp: the Tx response from the fw (agg or non-agg)
1424  *
1425  * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since
1426  * it can't know that everything will go well until the end of the AMPDU, it
1427  * can't know in advance the number of MPDUs that will be sent in the current
1428  * batch. This is why it writes the agg Tx response while it fetches the MPDUs.
1429  * Hence, it can't know in advance what the SSN of the SCD will be at the end
1430  * of the batch. This is why the SSN of the SCD is written at the end of the
1431  * whole struct at a variable offset. This function knows how to cope with the
1432  * variable offset and returns the SSN of the SCD.
1433  */
1434 static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm,
1435                                       struct iwl_mvm_tx_resp *tx_resp)
1436 {
1437         return le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) +
1438                             tx_resp->frame_count) & 0xfff;
1439 }
1440
1441 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm,
1442                                      struct iwl_rx_packet *pkt)
1443 {
1444         struct ieee80211_sta *sta;
1445         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1446         int txq_id = SEQ_TO_QUEUE(sequence);
1447         /* struct iwl_mvm_tx_resp_v3 is almost the same */
1448         struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1449         int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1450         int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1451         struct agg_tx_status *agg_status =
1452                 iwl_mvm_get_agg_status(mvm, tx_resp);
1453         u32 status = le16_to_cpu(agg_status->status);
1454         u16 ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp);
1455         struct sk_buff_head skbs;
1456         u8 skb_freed = 0;
1457         u8 lq_color;
1458         u16 next_reclaimed, seq_ctl;
1459         bool is_ndp = false;
1460
1461         __skb_queue_head_init(&skbs);
1462
1463         if (iwl_mvm_has_new_tx_api(mvm))
1464                 txq_id = le16_to_cpu(tx_resp->tx_queue);
1465
1466         seq_ctl = le16_to_cpu(tx_resp->seq_ctl);
1467
1468         /* we can free until ssn % q.n_bd not inclusive */
1469         iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs);
1470
1471         while (!skb_queue_empty(&skbs)) {
1472                 struct sk_buff *skb = __skb_dequeue(&skbs);
1473                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1474                 struct ieee80211_hdr *hdr = (void *)skb->data;
1475                 bool flushed = false;
1476
1477                 skb_freed++;
1478
1479                 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1480
1481                 memset(&info->status, 0, sizeof(info->status));
1482
1483                 /* inform mac80211 about what happened with the frame */
1484                 switch (status & TX_STATUS_MSK) {
1485                 case TX_STATUS_SUCCESS:
1486                 case TX_STATUS_DIRECT_DONE:
1487                         info->flags |= IEEE80211_TX_STAT_ACK;
1488                         break;
1489                 case TX_STATUS_FAIL_FIFO_FLUSHED:
1490                 case TX_STATUS_FAIL_DRAIN_FLOW:
1491                         flushed = true;
1492                         break;
1493                 case TX_STATUS_FAIL_DEST_PS:
1494                         /* the FW should have stopped the queue and not
1495                          * return this status
1496                          */
1497                         WARN_ON(1);
1498                         info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
1499                         break;
1500                 default:
1501                         break;
1502                 }
1503
1504                 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS &&
1505                     ieee80211_is_mgmt(hdr->frame_control))
1506                         iwl_mvm_toggle_tx_ant(mvm, &mvm->mgmt_last_antenna_idx);
1507
1508                 /*
1509                  * If we are freeing multiple frames, mark all the frames
1510                  * but the first one as acked, since they were acknowledged
1511                  * before
1512                  * */
1513                 if (skb_freed > 1)
1514                         info->flags |= IEEE80211_TX_STAT_ACK;
1515
1516                 iwl_mvm_tx_status_check_trigger(mvm, status);
1517
1518                 info->status.rates[0].count = tx_resp->failure_frame + 1;
1519                 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate),
1520                                             info);
1521                 info->status.status_driver_data[1] =
1522                         (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate);
1523
1524                 /* Single frame failure in an AMPDU queue => send BAR */
1525                 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
1526                     !(info->flags & IEEE80211_TX_STAT_ACK) &&
1527                     !(info->flags & IEEE80211_TX_STAT_TX_FILTERED) && !flushed)
1528                         info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1529                 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1530
1531                 /* W/A FW bug: seq_ctl is wrong upon failure / BAR frame */
1532                 if (ieee80211_is_back_req(hdr->frame_control))
1533                         seq_ctl = 0;
1534                 else if (status != TX_STATUS_SUCCESS)
1535                         seq_ctl = le16_to_cpu(hdr->seq_ctrl);
1536
1537                 if (unlikely(!seq_ctl)) {
1538                         struct ieee80211_hdr *hdr = (void *)skb->data;
1539
1540                         /*
1541                          * If it is an NDP, we can't update next_reclaim since
1542                          * its sequence control is 0. Note that for that same
1543                          * reason, NDPs are never sent to A-MPDU'able queues
1544                          * so that we can never have more than one freed frame
1545                          * for a single Tx resonse (see WARN_ON below).
1546                          */
1547                         if (ieee80211_is_qos_nullfunc(hdr->frame_control))
1548                                 is_ndp = true;
1549                 }
1550
1551                 /*
1552                  * TODO: this is not accurate if we are freeing more than one
1553                  * packet.
1554                  */
1555                 info->status.tx_time =
1556                         le16_to_cpu(tx_resp->wireless_media_time);
1557                 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1);
1558                 lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info);
1559                 info->status.status_driver_data[0] =
1560                         RS_DRV_DATA_PACK(lq_color, tx_resp->reduced_tpc);
1561
1562                 ieee80211_tx_status(mvm->hw, skb);
1563         }
1564
1565         /* This is an aggregation queue or might become one, so we use
1566          * the ssn since: ssn = wifi seq_num % 256.
1567          * The seq_ctl is the sequence control of the packet to which
1568          * this Tx response relates. But if there is a hole in the
1569          * bitmap of the BA we received, this Tx response may allow to
1570          * reclaim the hole and all the subsequent packets that were
1571          * already acked. In that case, seq_ctl != ssn, and the next
1572          * packet to be reclaimed will be ssn and not seq_ctl. In that
1573          * case, several packets will be reclaimed even if
1574          * frame_count = 1.
1575          *
1576          * The ssn is the index (% 256) of the latest packet that has
1577          * treated (acked / dropped) + 1.
1578          */
1579         next_reclaimed = ssn;
1580
1581         IWL_DEBUG_TX_REPLY(mvm,
1582                            "TXQ %d status %s (0x%08x)\n",
1583                            txq_id, iwl_mvm_get_tx_fail_reason(status), status);
1584
1585         IWL_DEBUG_TX_REPLY(mvm,
1586                            "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
1587                            le32_to_cpu(tx_resp->initial_rate),
1588                            tx_resp->failure_frame, SEQ_TO_INDEX(sequence),
1589                            ssn, next_reclaimed, seq_ctl);
1590
1591         rcu_read_lock();
1592
1593         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1594         /*
1595          * sta can't be NULL otherwise it'd mean that the sta has been freed in
1596          * the firmware while we still have packets for it in the Tx queues.
1597          */
1598         if (WARN_ON_ONCE(!sta))
1599                 goto out;
1600
1601         if (!IS_ERR(sta)) {
1602                 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1603
1604                 iwl_mvm_tx_airtime(mvm, mvmsta,
1605                                    le16_to_cpu(tx_resp->wireless_media_time));
1606
1607                 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS &&
1608                     mvmsta->sta_state < IEEE80211_STA_AUTHORIZED)
1609                         iwl_mvm_toggle_tx_ant(mvm, &mvmsta->tx_ant);
1610
1611                 if (sta->wme && tid != IWL_MGMT_TID) {
1612                         struct iwl_mvm_tid_data *tid_data =
1613                                 &mvmsta->tid_data[tid];
1614                         bool send_eosp_ndp = false;
1615
1616                         spin_lock_bh(&mvmsta->lock);
1617
1618                         if (!is_ndp) {
1619                                 tid_data->next_reclaimed = next_reclaimed;
1620                                 IWL_DEBUG_TX_REPLY(mvm,
1621                                                    "Next reclaimed packet:%d\n",
1622                                                    next_reclaimed);
1623                         } else {
1624                                 IWL_DEBUG_TX_REPLY(mvm,
1625                                                    "NDP - don't update next_reclaimed\n");
1626                         }
1627
1628                         iwl_mvm_check_ratid_empty(mvm, sta, tid);
1629
1630                         if (mvmsta->sleep_tx_count) {
1631                                 mvmsta->sleep_tx_count--;
1632                                 if (mvmsta->sleep_tx_count &&
1633                                     !iwl_mvm_tid_queued(mvm, tid_data)) {
1634                                         /*
1635                                          * The number of frames in the queue
1636                                          * dropped to 0 even if we sent less
1637                                          * frames than we thought we had on the
1638                                          * Tx queue.
1639                                          * This means we had holes in the BA
1640                                          * window that we just filled, ask
1641                                          * mac80211 to send EOSP since the
1642                                          * firmware won't know how to do that.
1643                                          * Send NDP and the firmware will send
1644                                          * EOSP notification that will trigger
1645                                          * a call to ieee80211_sta_eosp().
1646                                          */
1647                                         send_eosp_ndp = true;
1648                                 }
1649                         }
1650
1651                         spin_unlock_bh(&mvmsta->lock);
1652                         if (send_eosp_ndp) {
1653                                 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta,
1654                                         IEEE80211_FRAME_RELEASE_UAPSD,
1655                                         1, tid, false, false);
1656                                 mvmsta->sleep_tx_count = 0;
1657                                 ieee80211_send_eosp_nullfunc(sta, tid);
1658                         }
1659                 }
1660
1661                 if (mvmsta->next_status_eosp) {
1662                         mvmsta->next_status_eosp = false;
1663                         ieee80211_sta_eosp(sta);
1664                 }
1665         }
1666 out:
1667         rcu_read_unlock();
1668 }
1669
1670 #ifdef CONFIG_IWLWIFI_DEBUG
1671 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
1672 static const char *iwl_get_agg_tx_status(u16 status)
1673 {
1674         switch (status & AGG_TX_STATE_STATUS_MSK) {
1675         AGG_TX_STATE_(TRANSMITTED);
1676         AGG_TX_STATE_(UNDERRUN);
1677         AGG_TX_STATE_(BT_PRIO);
1678         AGG_TX_STATE_(FEW_BYTES);
1679         AGG_TX_STATE_(ABORT);
1680         AGG_TX_STATE_(TX_ON_AIR_DROP);
1681         AGG_TX_STATE_(LAST_SENT_TRY_CNT);
1682         AGG_TX_STATE_(LAST_SENT_BT_KILL);
1683         AGG_TX_STATE_(SCD_QUERY);
1684         AGG_TX_STATE_(TEST_BAD_CRC32);
1685         AGG_TX_STATE_(RESPONSE);
1686         AGG_TX_STATE_(DUMP_TX);
1687         AGG_TX_STATE_(DELAY_TX);
1688         }
1689
1690         return "UNKNOWN";
1691 }
1692
1693 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1694                                       struct iwl_rx_packet *pkt)
1695 {
1696         struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1697         struct agg_tx_status *frame_status =
1698                 iwl_mvm_get_agg_status(mvm, tx_resp);
1699         int i;
1700
1701         for (i = 0; i < tx_resp->frame_count; i++) {
1702                 u16 fstatus = le16_to_cpu(frame_status[i].status);
1703
1704                 IWL_DEBUG_TX_REPLY(mvm,
1705                                    "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
1706                                    iwl_get_agg_tx_status(fstatus),
1707                                    fstatus & AGG_TX_STATE_STATUS_MSK,
1708                                    (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >>
1709                                         AGG_TX_STATE_TRY_CNT_POS,
1710                                    le16_to_cpu(frame_status[i].sequence));
1711         }
1712 }
1713 #else
1714 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1715                                       struct iwl_rx_packet *pkt)
1716 {}
1717 #endif /* CONFIG_IWLWIFI_DEBUG */
1718
1719 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm,
1720                                   struct iwl_rx_packet *pkt)
1721 {
1722         struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1723         int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1724         int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1725         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1726         struct iwl_mvm_sta *mvmsta;
1727         int queue = SEQ_TO_QUEUE(sequence);
1728         struct ieee80211_sta *sta;
1729
1730         if (WARN_ON_ONCE(queue < IWL_MVM_DQA_MIN_DATA_QUEUE &&
1731                          (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)))
1732                 return;
1733
1734         iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt);
1735
1736         rcu_read_lock();
1737
1738         mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1739
1740         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1741         if (WARN_ON_ONCE(!sta || !sta->wme)) {
1742                 rcu_read_unlock();
1743                 return;
1744         }
1745
1746         if (!WARN_ON_ONCE(!mvmsta)) {
1747                 mvmsta->tid_data[tid].rate_n_flags =
1748                         le32_to_cpu(tx_resp->initial_rate);
1749                 mvmsta->tid_data[tid].tx_time =
1750                         le16_to_cpu(tx_resp->wireless_media_time);
1751                 mvmsta->tid_data[tid].lq_color =
1752                         TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info);
1753                 iwl_mvm_tx_airtime(mvm, mvmsta,
1754                                    le16_to_cpu(tx_resp->wireless_media_time));
1755         }
1756
1757         rcu_read_unlock();
1758 }
1759
1760 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1761 {
1762         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1763         struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1764
1765         if (tx_resp->frame_count == 1)
1766                 iwl_mvm_rx_tx_cmd_single(mvm, pkt);
1767         else
1768                 iwl_mvm_rx_tx_cmd_agg(mvm, pkt);
1769 }
1770
1771 static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid,
1772                                int txq, int index,
1773                                struct ieee80211_tx_info *ba_info, u32 rate)
1774 {
1775         struct sk_buff_head reclaimed_skbs;
1776         struct iwl_mvm_tid_data *tid_data;
1777         struct ieee80211_sta *sta;
1778         struct iwl_mvm_sta *mvmsta;
1779         struct sk_buff *skb;
1780         int freed;
1781
1782         if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT ||
1783                       tid > IWL_MAX_TID_COUNT,
1784                       "sta_id %d tid %d", sta_id, tid))
1785                 return;
1786
1787         rcu_read_lock();
1788
1789         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1790
1791         /* Reclaiming frames for a station that has been deleted ? */
1792         if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
1793                 rcu_read_unlock();
1794                 return;
1795         }
1796
1797         mvmsta = iwl_mvm_sta_from_mac80211(sta);
1798         tid_data = &mvmsta->tid_data[tid];
1799
1800         if (tid_data->txq_id != txq) {
1801                 IWL_ERR(mvm,
1802                         "invalid BA notification: Q %d, tid %d\n",
1803                         tid_data->txq_id, tid);
1804                 rcu_read_unlock();
1805                 return;
1806         }
1807
1808         __skb_queue_head_init(&reclaimed_skbs);
1809
1810         /*
1811          * Release all TFDs before the SSN, i.e. all TFDs in front of
1812          * block-ack window (we assume that they've been successfully
1813          * transmitted ... if not, it's too late anyway).
1814          */
1815         iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs);
1816
1817         spin_lock_bh(&mvmsta->lock);
1818
1819         tid_data->next_reclaimed = index;
1820
1821         iwl_mvm_check_ratid_empty(mvm, sta, tid);
1822
1823         freed = 0;
1824
1825         /* pack lq color from tid_data along the reduced txp */
1826         ba_info->status.status_driver_data[0] =
1827                 RS_DRV_DATA_PACK(tid_data->lq_color,
1828                                  ba_info->status.status_driver_data[0]);
1829         ba_info->status.status_driver_data[1] = (void *)(uintptr_t)rate;
1830
1831         skb_queue_walk(&reclaimed_skbs, skb) {
1832                 struct ieee80211_hdr *hdr = (void *)skb->data;
1833                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1834
1835                 if (ieee80211_is_data_qos(hdr->frame_control))
1836                         freed++;
1837                 else
1838                         WARN_ON_ONCE(tid != IWL_MAX_TID_COUNT);
1839
1840                 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1841
1842                 memset(&info->status, 0, sizeof(info->status));
1843                 /* Packet was transmitted successfully, failures come as single
1844                  * frames because before failing a frame the firmware transmits
1845                  * it without aggregation at least once.
1846                  */
1847                 info->flags |= IEEE80211_TX_STAT_ACK;
1848
1849                 /* this is the first skb we deliver in this batch */
1850                 /* put the rate scaling data there */
1851                 if (freed == 1) {
1852                         info->flags |= IEEE80211_TX_STAT_AMPDU;
1853                         memcpy(&info->status, &ba_info->status,
1854                                sizeof(ba_info->status));
1855                         iwl_mvm_hwrate_to_tx_status(rate, info);
1856                 }
1857         }
1858
1859         spin_unlock_bh(&mvmsta->lock);
1860
1861         /* We got a BA notif with 0 acked or scd_ssn didn't progress which is
1862          * possible (i.e. first MPDU in the aggregation wasn't acked)
1863          * Still it's important to update RS about sent vs. acked.
1864          */
1865         if (skb_queue_empty(&reclaimed_skbs)) {
1866                 struct ieee80211_chanctx_conf *chanctx_conf = NULL;
1867
1868                 if (mvmsta->vif)
1869                         chanctx_conf =
1870                                 rcu_dereference(mvmsta->vif->chanctx_conf);
1871
1872                 if (WARN_ON_ONCE(!chanctx_conf))
1873                         goto out;
1874
1875                 ba_info->band = chanctx_conf->def.chan->band;
1876                 iwl_mvm_hwrate_to_tx_status(rate, ba_info);
1877
1878                 if (!iwl_mvm_has_tlc_offload(mvm)) {
1879                         IWL_DEBUG_TX_REPLY(mvm,
1880                                            "No reclaim. Update rs directly\n");
1881                         iwl_mvm_rs_tx_status(mvm, sta, tid, ba_info, false);
1882                 }
1883         }
1884
1885 out:
1886         rcu_read_unlock();
1887
1888         while (!skb_queue_empty(&reclaimed_skbs)) {
1889                 skb = __skb_dequeue(&reclaimed_skbs);
1890                 ieee80211_tx_status(mvm->hw, skb);
1891         }
1892 }
1893
1894 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1895 {
1896         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1897         int sta_id, tid, txq, index;
1898         struct ieee80211_tx_info ba_info = {};
1899         struct iwl_mvm_ba_notif *ba_notif;
1900         struct iwl_mvm_tid_data *tid_data;
1901         struct iwl_mvm_sta *mvmsta;
1902
1903         ba_info.flags = IEEE80211_TX_STAT_AMPDU;
1904
1905         if (iwl_mvm_has_new_tx_api(mvm)) {
1906                 struct iwl_mvm_compressed_ba_notif *ba_res =
1907                         (void *)pkt->data;
1908                 u8 lq_color = TX_RES_RATE_TABLE_COL_GET(ba_res->tlc_rate_info);
1909                 int i;
1910
1911                 sta_id = ba_res->sta_id;
1912                 ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done);
1913                 ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed);
1914                 ba_info.status.tx_time =
1915                         (u16)le32_to_cpu(ba_res->wireless_time);
1916                 ba_info.status.status_driver_data[0] =
1917                         (void *)(uintptr_t)ba_res->reduced_txp;
1918
1919                 if (!le16_to_cpu(ba_res->tfd_cnt))
1920                         goto out;
1921
1922                 rcu_read_lock();
1923
1924                 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1925                 if (!mvmsta)
1926                         goto out_unlock;
1927
1928                 /* Free per TID */
1929                 for (i = 0; i < le16_to_cpu(ba_res->tfd_cnt); i++) {
1930                         struct iwl_mvm_compressed_ba_tfd *ba_tfd =
1931                                 &ba_res->tfd[i];
1932
1933                         tid = ba_tfd->tid;
1934                         if (tid == IWL_MGMT_TID)
1935                                 tid = IWL_MAX_TID_COUNT;
1936
1937                         mvmsta->tid_data[i].lq_color = lq_color;
1938                         iwl_mvm_tx_reclaim(mvm, sta_id, tid,
1939                                            (int)(le16_to_cpu(ba_tfd->q_num)),
1940                                            le16_to_cpu(ba_tfd->tfd_index),
1941                                            &ba_info,
1942                                            le32_to_cpu(ba_res->tx_rate));
1943                 }
1944
1945                 iwl_mvm_tx_airtime(mvm, mvmsta,
1946                                    le32_to_cpu(ba_res->wireless_time));
1947 out_unlock:
1948                 rcu_read_unlock();
1949 out:
1950                 IWL_DEBUG_TX_REPLY(mvm,
1951                                    "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n",
1952                                    sta_id, le32_to_cpu(ba_res->flags),
1953                                    le16_to_cpu(ba_res->txed),
1954                                    le16_to_cpu(ba_res->done));
1955                 return;
1956         }
1957
1958         ba_notif = (void *)pkt->data;
1959         sta_id = ba_notif->sta_id;
1960         tid = ba_notif->tid;
1961         /* "flow" corresponds to Tx queue */
1962         txq = le16_to_cpu(ba_notif->scd_flow);
1963         /* "ssn" is start of block-ack Tx window, corresponds to index
1964          * (in Tx queue's circular buffer) of first TFD/frame in window */
1965         index = le16_to_cpu(ba_notif->scd_ssn);
1966
1967         rcu_read_lock();
1968         mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1969         if (WARN_ON_ONCE(!mvmsta)) {
1970                 rcu_read_unlock();
1971                 return;
1972         }
1973
1974         tid_data = &mvmsta->tid_data[tid];
1975
1976         ba_info.status.ampdu_ack_len = ba_notif->txed_2_done;
1977         ba_info.status.ampdu_len = ba_notif->txed;
1978         ba_info.status.tx_time = tid_data->tx_time;
1979         ba_info.status.status_driver_data[0] =
1980                 (void *)(uintptr_t)ba_notif->reduced_txp;
1981
1982         rcu_read_unlock();
1983
1984         iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info,
1985                            tid_data->rate_n_flags);
1986
1987         IWL_DEBUG_TX_REPLY(mvm,
1988                            "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
1989                            ba_notif->sta_addr, ba_notif->sta_id);
1990
1991         IWL_DEBUG_TX_REPLY(mvm,
1992                            "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
1993                            ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl),
1994                            le64_to_cpu(ba_notif->bitmap), txq, index,
1995                            ba_notif->txed, ba_notif->txed_2_done);
1996
1997         IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n",
1998                            ba_notif->reduced_txp);
1999 }
2000
2001 /*
2002  * Note that there are transports that buffer frames before they reach
2003  * the firmware. This means that after flush_tx_path is called, the
2004  * queue might not be empty. The race-free way to handle this is to:
2005  * 1) set the station as draining
2006  * 2) flush the Tx path
2007  * 3) wait for the transport queues to be empty
2008  */
2009 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, u32 flags)
2010 {
2011         int ret;
2012         struct iwl_tx_path_flush_cmd_v1 flush_cmd = {
2013                 .queues_ctl = cpu_to_le32(tfd_msk),
2014                 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH),
2015         };
2016
2017         WARN_ON(iwl_mvm_has_new_tx_api(mvm));
2018
2019         ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags,
2020                                    sizeof(flush_cmd), &flush_cmd);
2021         if (ret)
2022                 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
2023         return ret;
2024 }
2025
2026 int iwl_mvm_flush_sta_tids(struct iwl_mvm *mvm, u32 sta_id,
2027                            u16 tids, u32 flags)
2028 {
2029         int ret;
2030         struct iwl_tx_path_flush_cmd flush_cmd = {
2031                 .sta_id = cpu_to_le32(sta_id),
2032                 .tid_mask = cpu_to_le16(tids),
2033         };
2034
2035         WARN_ON(!iwl_mvm_has_new_tx_api(mvm));
2036
2037         ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags,
2038                                    sizeof(flush_cmd), &flush_cmd);
2039         if (ret)
2040                 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
2041         return ret;
2042 }
2043
2044 int iwl_mvm_flush_sta(struct iwl_mvm *mvm, void *sta, bool internal, u32 flags)
2045 {
2046         struct iwl_mvm_int_sta *int_sta = sta;
2047         struct iwl_mvm_sta *mvm_sta = sta;
2048
2049         BUILD_BUG_ON(offsetof(struct iwl_mvm_int_sta, sta_id) !=
2050                      offsetof(struct iwl_mvm_sta, sta_id));
2051
2052         if (iwl_mvm_has_new_tx_api(mvm))
2053                 return iwl_mvm_flush_sta_tids(mvm, mvm_sta->sta_id,
2054                                               0xff | BIT(IWL_MGMT_TID), flags);
2055
2056         if (internal)
2057                 return iwl_mvm_flush_tx_path(mvm, int_sta->tfd_queue_msk,
2058                                              flags);
2059
2060         return iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, flags);
2061 }