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
  18  * WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  20  * General Public License for more details.
  21  *
  22  * The full GNU General Public License is included in this distribution
  23  * in the file called COPYING.
  24  *
  25  * Contact Information:
  26  *  Intel Linux Wireless <linuxwifi@intel.com>
  27  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  28  *
  29  * BSD LICENSE
  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
  35  * All rights reserved.
  36  *
  37  * Redistribution and use in source and binary forms, with or without
  38  * modification, are permitted provided that the following conditions
  39  * are met:
  40  *
  41  *  * Redistributions of source code must retain the above copyright
  42  *    notice, this list of conditions and the following disclaimer.
  43  *  * Redistributions in binary form must reproduce the above copyright
  44  *    notice, this list of conditions and the following disclaimer in
  45  *    the documentation and/or other materials provided with the
  46  *    distribution.
  47  *  * Neither the name Intel Corporation nor the names of its
  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_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_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         /* Make sure we zero enough of dev_cmd */
 505         BUILD_BUG_ON(sizeof(struct iwl_tx_cmd_gen2) > sizeof(*tx_cmd));
 506         BUILD_BUG_ON(sizeof(struct iwl_tx_cmd_gen3) > sizeof(*tx_cmd));
 507
 508         memset(dev_cmd, 0, sizeof(dev_cmd->hdr) + sizeof(*tx_cmd));
 509         dev_cmd->hdr.cmd = TX_CMD;
 510
 511         if (iwl_mvm_has_new_tx_api(mvm)) {
 512                 u16 offload_assist = 0;
 513                 u32 rate_n_flags = 0;
 514                 u16 flags = 0;
 515                 struct iwl_mvm_sta *mvmsta = sta ?
 516                         iwl_mvm_sta_from_mac80211(sta) : NULL;
 517
 518                 if (ieee80211_is_data_qos(hdr->frame_control)) {
 519                         u8 *qc = ieee80211_get_qos_ctl(hdr);
 520
 521                         if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT)
 522                                 offload_assist |= BIT(TX_CMD_OFFLD_AMSDU);
 523                 }
 524
 525                 offload_assist = iwl_mvm_tx_csum(mvm, skb, hdr, info,
 526                                                  offload_assist);
 527
 528                 /* padding is inserted later in transport */
 529                 if (ieee80211_hdrlen(hdr->frame_control) % 4 &&
 530                     !(offload_assist & BIT(TX_CMD_OFFLD_AMSDU)))
 531                         offload_assist |= BIT(TX_CMD_OFFLD_PAD);
 532
 533                 if (!info->control.hw_key)
 534                         flags |= IWL_TX_FLAGS_ENCRYPT_DIS;
 535
 536                 /*
 537                  * For data packets rate info comes from the fw. Only
 538                  * set rate/antenna during connection establishment or in case
 539                  * no station is given.
 540                  */
 541                 if (!sta || !ieee80211_is_data(hdr->frame_control) ||
 542                     mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) {
 543                         flags |= IWL_TX_FLAGS_CMD_RATE;
 544                         rate_n_flags =
 545                                 iwl_mvm_get_tx_rate_n_flags(mvm, info, sta,
 546                                                             hdr->frame_control);
 547                 }
 548
 549                 if (mvm->trans->cfg->device_family >=
 550                     IWL_DEVICE_FAMILY_22560) {
 551                         struct iwl_tx_cmd_gen3 *cmd = (void *)dev_cmd->payload;
 552
 553                         cmd->offload_assist |= cpu_to_le32(offload_assist);
 554
 555                         /* Total # bytes to be transmitted */
 556                         cmd->len = cpu_to_le16((u16)skb->len);
 557
 558                         /* Copy MAC header from skb into command buffer */
 559                         memcpy(cmd->hdr, hdr, hdrlen);
 560
 561                         cmd->flags = cpu_to_le16(flags);
 562                         cmd->rate_n_flags = cpu_to_le32(rate_n_flags);
 563                 } else {
 564                         struct iwl_tx_cmd_gen2 *cmd = (void *)dev_cmd->payload;
 565
 566                         cmd->offload_assist |= cpu_to_le16(offload_assist);
 567
 568                         /* Total # bytes to be transmitted */
 569                         cmd->len = cpu_to_le16((u16)skb->len);
 570
 571                         /* Copy MAC header from skb into command buffer */
 572                         memcpy(cmd->hdr, hdr, hdrlen);
 573
 574                         cmd->flags = cpu_to_le32(flags);
 575                         cmd->rate_n_flags = cpu_to_le32(rate_n_flags);
 576                 }
 577                 goto out;
 578         }
 579
 580         tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
 581
 582         if (info->control.hw_key)
 583                 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen);
 584
 585         iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id);
 586
 587         iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control);
 588
 589         /* Copy MAC header from skb into command buffer */
 590         memcpy(tx_cmd->hdr, hdr, hdrlen);
 591
 592 out:
 593         return dev_cmd;
 594 }
 595
 596 static void iwl_mvm_skb_prepare_status(struct sk_buff *skb,
 597                                        struct iwl_device_cmd *cmd)
 598 {
 599         struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb);
 600
 601         memset(&skb_info->status, 0, sizeof(skb_info->status));
 602         memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data));
 603
 604         skb_info->driver_data[1] = cmd;
 605 }
 606
 607 static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm,
 608                                       struct ieee80211_tx_info *info,
 609                                       struct ieee80211_hdr *hdr)
 610 {
 611         struct iwl_mvm_vif *mvmvif =
 612                 iwl_mvm_vif_from_mac80211(info->control.vif);
 613         __le16 fc = hdr->frame_control;
 614
 615         switch (info->control.vif->type) {
 616         case NL80211_IFTYPE_AP:
 617         case NL80211_IFTYPE_ADHOC:
 618                 /*
 619                  * Non-bufferable frames use the broadcast station, thus they
 620                  * use the probe queue.
 621                  * Also take care of the case where we send a deauth to a
 622                  * station that we don't have, or similarly an association
 623                  * response (with non-success status) for a station we can't
 624                  * accept.
 625                  * Also, disassociate frames might happen, particular with
 626                  * reason 7 ("Class 3 frame received from nonassociated STA").
 627                  */
 628                 if (ieee80211_is_mgmt(fc) &&
 629                     (!ieee80211_is_bufferable_mmpdu(fc) ||
 630                      ieee80211_is_deauth(fc) || ieee80211_is_disassoc(fc)))
 631                         return mvm->probe_queue;
 632
 633                 if (!ieee80211_has_order(fc) && !ieee80211_is_probe_req(fc) &&
 634                     is_multicast_ether_addr(hdr->addr1))
 635                         return mvmvif->cab_queue;
 636
 637                 WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC,
 638                           "fc=0x%02x", le16_to_cpu(fc));
 639                 return mvm->probe_queue;
 640         case NL80211_IFTYPE_P2P_DEVICE:
 641                 if (ieee80211_is_mgmt(fc))
 642                         return mvm->p2p_dev_queue;
 643
 644                 WARN_ON_ONCE(1);
 645                 return mvm->p2p_dev_queue;
 646         default:
 647                 WARN_ONCE(1, "Not a ctrl vif, no available queue\n");
 648                 return -1;
 649         }
 650 }
 651
 652 static void iwl_mvm_probe_resp_set_noa(struct iwl_mvm *mvm,
 653                                        struct sk_buff *skb)
 654 {
 655         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 656         struct iwl_mvm_vif *mvmvif =
 657                 iwl_mvm_vif_from_mac80211(info->control.vif);
 658         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
 659         int base_len = (u8 *)mgmt->u.probe_resp.variable - (u8 *)mgmt;
 660         struct iwl_probe_resp_data *resp_data;
 661         u8 *ie, *pos;
 662         u8 match[] = {
 663                 (WLAN_OUI_WFA >> 16) & 0xff,
 664                 (WLAN_OUI_WFA >> 8) & 0xff,
 665                 WLAN_OUI_WFA & 0xff,
 666                 WLAN_OUI_TYPE_WFA_P2P,
 667         };
 668
 669         rcu_read_lock();
 670
 671         resp_data = rcu_dereference(mvmvif->probe_resp_data);
 672         if (!resp_data)
 673                 goto out;
 674
 675         if (!resp_data->notif.noa_active)
 676                 goto out;
 677
 678         ie = (u8 *)cfg80211_find_ie_match(WLAN_EID_VENDOR_SPECIFIC,
 679                                           mgmt->u.probe_resp.variable,
 680                                           skb->len - base_len,
 681                                           match, 4, 2);
 682         if (!ie) {
 683                 IWL_DEBUG_TX(mvm, "probe resp doesn't have P2P IE\n");
 684                 goto out;
 685         }
 686
 687         if (skb_tailroom(skb) < resp_data->noa_len) {
 688                 if (pskb_expand_head(skb, 0, resp_data->noa_len, GFP_ATOMIC)) {
 689                         IWL_ERR(mvm,
 690                                 "Failed to reallocate probe resp\n");
 691                         goto out;
 692                 }
 693         }
 694
 695         pos = skb_put(skb, resp_data->noa_len);
 696
 697         *pos++ = WLAN_EID_VENDOR_SPECIFIC;
 698         /* Set length of IE body (not including ID and length itself) */
 699         *pos++ = resp_data->noa_len - 2;
 700         *pos++ = (WLAN_OUI_WFA >> 16) & 0xff;
 701         *pos++ = (WLAN_OUI_WFA >> 8) & 0xff;
 702         *pos++ = WLAN_OUI_WFA & 0xff;
 703         *pos++ = WLAN_OUI_TYPE_WFA_P2P;
 704
 705         memcpy(pos, &resp_data->notif.noa_attr,
 706                resp_data->noa_len - sizeof(struct ieee80211_vendor_ie));
 707
 708 out:
 709         rcu_read_unlock();
 710 }
 711
 712 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb)
 713 {
 714         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 715         struct ieee80211_tx_info info;
 716         struct iwl_device_cmd *dev_cmd;
 717         u8 sta_id;
 718         int hdrlen = ieee80211_hdrlen(hdr->frame_control);
 719         __le16 fc = hdr->frame_control;
 720         bool offchannel = IEEE80211_SKB_CB(skb)->flags &
 721                 IEEE80211_TX_CTL_TX_OFFCHAN;
 722         int queue = -1;
 723
 724         if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc))
 725                 return -1;
 726
 727         memcpy(&info, skb->cb, sizeof(info));
 728
 729         if (WARN_ON_ONCE(skb->len > IEEE80211_MAX_DATA_LEN + hdrlen))
 730                 return -1;
 731
 732         if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU))
 733                 return -1;
 734
 735         if (info.control.vif) {
 736                 struct iwl_mvm_vif *mvmvif =
 737                         iwl_mvm_vif_from_mac80211(info.control.vif);
 738
 739                 if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE ||
 740                     info.control.vif->type == NL80211_IFTYPE_AP ||
 741                     info.control.vif->type == NL80211_IFTYPE_ADHOC) {
 742                         if (!ieee80211_is_data(hdr->frame_control))
 743                                 sta_id = mvmvif->bcast_sta.sta_id;
 744                         else
 745                                 sta_id = mvmvif->mcast_sta.sta_id;
 746
 747                         queue = iwl_mvm_get_ctrl_vif_queue(mvm, &info, hdr);
 748                 } else if (info.control.vif->type == NL80211_IFTYPE_MONITOR) {
 749                         queue = mvm->snif_queue;
 750                         sta_id = mvm->snif_sta.sta_id;
 751                 } else if (info.control.vif->type == NL80211_IFTYPE_STATION &&
 752                            offchannel) {
 753                         /*
 754                          * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets
 755                          * that can be used in 2 different types of vifs, P2P &
 756                          * STATION.
 757                          * P2P uses the offchannel queue.
 758                          * STATION (HS2.0) uses the auxiliary context of the FW,
 759                          * and hence needs to be sent on the aux queue.
 760                          */
 761                         sta_id = mvm->aux_sta.sta_id;
 762                         queue = mvm->aux_queue;
 763                 }
 764         }
 765
 766         if (queue < 0) {
 767                 IWL_ERR(mvm, "No queue was found. Dropping TX\n");
 768                 return -1;
 769         }
 770
 771         if (unlikely(ieee80211_is_probe_resp(fc)))
 772                 iwl_mvm_probe_resp_set_noa(mvm, skb);
 773
 774         IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue);
 775
 776         dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id);
 777         if (!dev_cmd)
 778                 return -1;
 779
 780         /* From now on, we cannot access info->control */
 781         iwl_mvm_skb_prepare_status(skb, dev_cmd);
 782
 783         if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) {
 784                 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
 785                 return -1;
 786         }
 787
 788         return 0;
 789 }
 790
 791 unsigned int iwl_mvm_max_amsdu_size(struct iwl_mvm *mvm,
 792                                     struct ieee80211_sta *sta, unsigned int tid)
 793 {
 794         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 795         enum nl80211_band band = mvmsta->vif->bss_conf.chandef.chan->band;
 796         u8 ac = tid_to_mac80211_ac[tid];
 797         unsigned int txf;
 798         int lmac = IWL_LMAC_24G_INDEX;
 799
 800         if (iwl_mvm_is_cdb_supported(mvm) &&
 801             band == NL80211_BAND_5GHZ)
 802                 lmac = IWL_LMAC_5G_INDEX;
 803
 804         /* For HE redirect to trigger based fifos */
 805         if (sta->he_cap.has_he && !WARN_ON(!iwl_mvm_has_new_tx_api(mvm)))
 806                 ac += 4;
 807
 808         txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac);
 809
 810         /*
 811          * Don't send an AMSDU that will be longer than the TXF.
 812          * Add a security margin of 256 for the TX command + headers.
 813          * We also want to have the start of the next packet inside the
 814          * fifo to be able to send bursts.
 815          */
 816         return min_t(unsigned int, mvmsta->max_amsdu_len,
 817                      mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256);
 818 }
 819
 820 #ifdef CONFIG_INET
 821
 822 static int
 823 iwl_mvm_tx_tso_segment(struct sk_buff *skb, unsigned int num_subframes,
 824                        netdev_features_t netdev_flags,
 825                        struct sk_buff_head *mpdus_skb)
 826 {
 827         struct sk_buff *tmp, *next;
 828         struct ieee80211_hdr *hdr = (void *)skb->data;
 829         char cb[sizeof(skb->cb)];
 830         u16 i = 0;
 831         unsigned int tcp_payload_len;
 832         unsigned int mss = skb_shinfo(skb)->gso_size;
 833         bool ipv4 = (skb->protocol == htons(ETH_P_IP));
 834         u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0;
 835
 836         skb_shinfo(skb)->gso_size = num_subframes * mss;
 837         memcpy(cb, skb->cb, sizeof(cb));
 838
 839         next = skb_gso_segment(skb, netdev_flags);
 840         skb_shinfo(skb)->gso_size = mss;
 841         if (WARN_ON_ONCE(IS_ERR(next)))
 842                 return -EINVAL;
 843         else if (next)
 844                 consume_skb(skb);
 845
 846         while (next) {
 847                 tmp = next;
 848                 next = tmp->next;
 849
 850                 memcpy(tmp->cb, cb, sizeof(tmp->cb));
 851                 /*
 852                  * Compute the length of all the data added for the A-MSDU.
 853                  * This will be used to compute the length to write in the TX
 854                  * command. We have: SNAP + IP + TCP for n -1 subframes and
 855                  * ETH header for n subframes.
 856                  */
 857                 tcp_payload_len = skb_tail_pointer(tmp) -
 858                         skb_transport_header(tmp) -
 859                         tcp_hdrlen(tmp) + tmp->data_len;
 860
 861                 if (ipv4)
 862                         ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes);
 863
 864                 if (tcp_payload_len > mss) {
 865                         skb_shinfo(tmp)->gso_size = mss;
 866                 } else {
 867                         if (ieee80211_is_data_qos(hdr->frame_control)) {
 868                                 u8 *qc;
 869
 870                                 if (ipv4)
 871                                         ip_send_check(ip_hdr(tmp));
 872
 873                                 qc = ieee80211_get_qos_ctl((void *)tmp->data);
 874                                 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
 875                         }
 876                         skb_shinfo(tmp)->gso_size = 0;
 877                 }
 878
 879                 tmp->prev = NULL;
 880                 tmp->next = NULL;
 881
 882                 __skb_queue_tail(mpdus_skb, tmp);
 883                 i++;
 884         }
 885
 886         return 0;
 887 }
 888
 889 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
 890                           struct ieee80211_tx_info *info,
 891                           struct ieee80211_sta *sta,
 892                           struct sk_buff_head *mpdus_skb)
 893 {
 894         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 895         struct ieee80211_hdr *hdr = (void *)skb->data;
 896         unsigned int mss = skb_shinfo(skb)->gso_size;
 897         unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len;
 898         u16 snap_ip_tcp, pad;
 899         netdev_features_t netdev_flags = NETIF_F_CSUM_MASK | NETIF_F_SG;
 900         u8 tid;
 901
 902         snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) +
 903                 tcp_hdrlen(skb);
 904
 905         if (!mvmsta->max_amsdu_len ||
 906             !ieee80211_is_data_qos(hdr->frame_control) ||
 907             !mvmsta->amsdu_enabled)
 908                 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
 909
 910         /*
 911          * Do not build AMSDU for IPv6 with extension headers.
 912          * ask stack to segment and checkum the generated MPDUs for us.
 913          */
 914         if (skb->protocol == htons(ETH_P_IPV6) &&
 915             ((struct ipv6hdr *)skb_network_header(skb))->nexthdr !=
 916             IPPROTO_TCP) {
 917                 netdev_flags &= ~NETIF_F_CSUM_MASK;
 918                 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
 919         }
 920
 921         tid = ieee80211_get_tid(hdr);
 922         if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
 923                 return -EINVAL;
 924
 925         /*
 926          * No need to lock amsdu_in_ampdu_allowed since it can't be modified
 927          * during an BA session.
 928          */
 929         if (info->flags & IEEE80211_TX_CTL_AMPDU &&
 930             !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed)
 931                 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
 932
 933         if (iwl_mvm_vif_low_latency(iwl_mvm_vif_from_mac80211(mvmsta->vif)) ||
 934             !(mvmsta->amsdu_enabled & BIT(tid)))
 935                 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
 936
 937         max_amsdu_len = iwl_mvm_max_amsdu_size(mvm, sta, tid);
 938
 939         /*
 940          * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not
 941          * supported. This is a spec requirement (IEEE 802.11-2015
 942          * section 8.7.3 NOTE 3).
 943          */
 944         if (info->flags & IEEE80211_TX_CTL_AMPDU &&
 945             !sta->vht_cap.vht_supported)
 946                 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095);
 947
 948         /* Sub frame header + SNAP + IP header + TCP header + MSS */
 949         subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss;
 950         pad = (4 - subf_len) & 0x3;
 951
 952         /*
 953          * If we have N subframes in the A-MSDU, then the A-MSDU's size is
 954          * N * subf_len + (N - 1) * pad.
 955          */
 956         num_subframes = (max_amsdu_len + pad) / (subf_len + pad);
 957
 958         if (sta->max_amsdu_subframes &&
 959             num_subframes > sta->max_amsdu_subframes)
 960                 num_subframes = sta->max_amsdu_subframes;
 961
 962         tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
 963                 tcp_hdrlen(skb) + skb->data_len;
 964
 965         /*
 966          * Make sure we have enough TBs for the A-MSDU:
 967          *      2 for each subframe
 968          *      1 more for each fragment
 969          *      1 more for the potential data in the header
 970          */
 971         if ((num_subframes * 2 + skb_shinfo(skb)->nr_frags + 1) >
 972             mvm->trans->max_skb_frags)
 973                 num_subframes = 1;
 974
 975         if (num_subframes > 1)
 976                 *ieee80211_get_qos_ctl(hdr) |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
 977
 978         /* This skb fits in one single A-MSDU */
 979         if (num_subframes * mss >= tcp_payload_len) {
 980                 __skb_queue_tail(mpdus_skb, skb);
 981                 return 0;
 982         }
 983
 984         /*
 985          * Trick the segmentation function to make it
 986          * create SKBs that can fit into one A-MSDU.
 987          */
 988         return iwl_mvm_tx_tso_segment(skb, num_subframes, netdev_flags,
 989                                       mpdus_skb);
 990 }
 991 #else /* CONFIG_INET */
 992 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
 993                           struct ieee80211_tx_info *info,
 994                           struct ieee80211_sta *sta,
 995                           struct sk_buff_head *mpdus_skb)
 996 {
 997         /* Impossible to get TSO with CONFIG_INET */
 998         WARN_ON(1);
 999
1000         return -1;
1001 }
1002 #endif
1003
1004 /* Check if there are any timed-out TIDs on a given shared TXQ */
1005 static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id)
1006 {
1007         unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap;
1008         unsigned long now = jiffies;
1009         int tid;
1010
1011         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1012                 return false;
1013
1014         for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) {
1015                 if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] +
1016                                 IWL_MVM_DQA_QUEUE_TIMEOUT, now))
1017                         return true;
1018         }
1019
1020         return false;
1021 }
1022
1023 static void iwl_mvm_tx_airtime(struct iwl_mvm *mvm,
1024                                struct iwl_mvm_sta *mvmsta,
1025                                int airtime)
1026 {
1027         int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
1028         struct iwl_mvm_tcm_mac *mdata;
1029
1030         if (mac >= NUM_MAC_INDEX_DRIVER)
1031                 return;
1032
1033         mdata = &mvm->tcm.data[mac];
1034
1035         if (mvm->tcm.paused)
1036                 return;
1037
1038         if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD))
1039                 schedule_delayed_work(&mvm->tcm.work, 0);
1040
1041         mdata->tx.airtime += airtime;
1042 }
1043
1044 static int iwl_mvm_tx_pkt_queued(struct iwl_mvm *mvm,
1045                                  struct iwl_mvm_sta *mvmsta, int tid)
1046 {
1047         u32 ac = tid_to_mac80211_ac[tid];
1048         int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
1049         struct iwl_mvm_tcm_mac *mdata;
1050
1051         if (mac >= NUM_MAC_INDEX_DRIVER)
1052                 return -EINVAL;
1053
1054         mdata = &mvm->tcm.data[mac];
1055
1056         mdata->tx.pkts[ac]++;
1057
1058         return 0;
1059 }
1060
1061 /*
1062  * Sets the fields in the Tx cmd that are crypto related.
1063  *
1064  * This function must be called with BHs disabled.
1065  */
1066 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb,
1067                            struct ieee80211_tx_info *info,
1068                            struct ieee80211_sta *sta)
1069 {
1070         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1071         struct iwl_mvm_sta *mvmsta;
1072         struct iwl_device_cmd *dev_cmd;
1073         __le16 fc;
1074         u16 seq_number = 0;
1075         u8 tid = IWL_MAX_TID_COUNT;
1076         u16 txq_id;
1077         bool is_ampdu = false;
1078         int hdrlen;
1079
1080         mvmsta = iwl_mvm_sta_from_mac80211(sta);
1081         fc = hdr->frame_control;
1082         hdrlen = ieee80211_hdrlen(fc);
1083
1084         if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc))
1085                 return -1;
1086
1087         if (WARN_ON_ONCE(!mvmsta))
1088                 return -1;
1089
1090         if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA))
1091                 return -1;
1092
1093         if (unlikely(ieee80211_is_probe_resp(fc)))
1094                 iwl_mvm_probe_resp_set_noa(mvm, skb);
1095
1096         dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen,
1097                                         sta, mvmsta->sta_id);
1098         if (!dev_cmd)
1099                 goto drop;
1100
1101         /*
1102          * we handle that entirely ourselves -- for uAPSD the firmware
1103          * will always send a notification, and for PS-Poll responses
1104          * we'll notify mac80211 when getting frame status
1105          */
1106         info->flags &= ~IEEE80211_TX_STATUS_EOSP;
1107
1108         spin_lock(&mvmsta->lock);
1109
1110         /* nullfunc frames should go to the MGMT queue regardless of QOS,
1111          * the condition of !ieee80211_is_qos_nullfunc(fc) keeps the default
1112          * assignment of MGMT TID
1113          */
1114         if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
1115                 tid = ieee80211_get_tid(hdr);
1116                 if (WARN_ONCE(tid >= IWL_MAX_TID_COUNT, "Invalid TID %d", tid))
1117                         goto drop_unlock_sta;
1118
1119                 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU;
1120                 if (WARN_ONCE(is_ampdu &&
1121                               mvmsta->tid_data[tid].state != IWL_AGG_ON,
1122                               "Invalid internal agg state %d for TID %d",
1123                                mvmsta->tid_data[tid].state, tid))
1124                         goto drop_unlock_sta;
1125
1126                 seq_number = mvmsta->tid_data[tid].seq_number;
1127                 seq_number &= IEEE80211_SCTL_SEQ;
1128
1129                 if (!iwl_mvm_has_new_tx_api(mvm)) {
1130                         struct iwl_tx_cmd *tx_cmd = (void *)dev_cmd->payload;
1131
1132                         hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
1133                         hdr->seq_ctrl |= cpu_to_le16(seq_number);
1134                         /* update the tx_cmd hdr as it was already copied */
1135                         tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl;
1136                 }
1137         } else if (ieee80211_is_data(fc) && !ieee80211_is_data_qos(fc)) {
1138                 tid = IWL_TID_NON_QOS;
1139         }
1140
1141         txq_id = mvmsta->tid_data[tid].txq_id;
1142
1143         WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
1144
1145         if (WARN_ONCE(txq_id == IWL_MVM_INVALID_QUEUE, "Invalid TXQ id")) {
1146                 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1147                 spin_unlock(&mvmsta->lock);
1148                 return 0;
1149         }
1150
1151         if (!iwl_mvm_has_new_tx_api(mvm)) {
1152                 /* Keep track of the time of the last frame for this RA/TID */
1153                 mvm->queue_info[txq_id].last_frame_time[tid] = jiffies;
1154
1155                 /*
1156                  * If we have timed-out TIDs - schedule the worker that will
1157                  * reconfig the queues and update them
1158                  *
1159                  * Note that the no lock is taken here in order to not serialize
1160                  * the TX flow. This isn't dangerous because scheduling
1161                  * mvm->add_stream_wk can't ruin the state, and if we DON'T
1162                  * schedule it due to some race condition then next TX we get
1163                  * here we will.
1164                  */
1165                 if (unlikely(mvm->queue_info[txq_id].status ==
1166                              IWL_MVM_QUEUE_SHARED &&
1167                              iwl_mvm_txq_should_update(mvm, txq_id)))
1168                         schedule_work(&mvm->add_stream_wk);
1169         }
1170
1171         IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id,
1172                      tid, txq_id, IEEE80211_SEQ_TO_SN(seq_number));
1173
1174         /* From now on, we cannot access info->control */
1175         iwl_mvm_skb_prepare_status(skb, dev_cmd);
1176
1177         if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id))
1178                 goto drop_unlock_sta;
1179
1180         if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc))
1181                 mvmsta->tid_data[tid].seq_number = seq_number + 0x10;
1182
1183         spin_unlock(&mvmsta->lock);
1184
1185         if (iwl_mvm_tx_pkt_queued(mvm, mvmsta,
1186                                   tid == IWL_MAX_TID_COUNT ? 0 : tid))
1187                 goto drop;
1188
1189         return 0;
1190
1191 drop_unlock_sta:
1192         iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1193         spin_unlock(&mvmsta->lock);
1194 drop:
1195         IWL_DEBUG_TX(mvm, "TX to [%d|%d] dropped\n", mvmsta->sta_id, tid);
1196         return -1;
1197 }
1198
1199 int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb,
1200                    struct ieee80211_sta *sta)
1201 {
1202         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1203         struct ieee80211_tx_info info;
1204         struct sk_buff_head mpdus_skbs;
1205         unsigned int payload_len;
1206         int ret;
1207
1208         if (WARN_ON_ONCE(!mvmsta))
1209                 return -1;
1210
1211         if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA))
1212                 return -1;
1213
1214         memcpy(&info, skb->cb, sizeof(info));
1215
1216         if (!skb_is_gso(skb))
1217                 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1218
1219         payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
1220                 tcp_hdrlen(skb) + skb->data_len;
1221
1222         if (payload_len <= skb_shinfo(skb)->gso_size)
1223                 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1224
1225         __skb_queue_head_init(&mpdus_skbs);
1226
1227         ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs);
1228         if (ret)
1229                 return ret;
1230
1231         if (WARN_ON(skb_queue_empty(&mpdus_skbs)))
1232                 return ret;
1233
1234         while (!skb_queue_empty(&mpdus_skbs)) {
1235                 skb = __skb_dequeue(&mpdus_skbs);
1236
1237                 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1238                 if (ret) {
1239                         __skb_queue_purge(&mpdus_skbs);
1240                         return ret;
1241                 }
1242         }
1243
1244         return 0;
1245 }
1246
1247 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm,
1248                                       struct ieee80211_sta *sta, u8 tid)
1249 {
1250         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1251         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1252         struct ieee80211_vif *vif = mvmsta->vif;
1253         u16 normalized_ssn;
1254
1255         lockdep_assert_held(&mvmsta->lock);
1256
1257         if ((tid_data->state == IWL_AGG_ON ||
1258              tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) &&
1259             iwl_mvm_tid_queued(mvm, tid_data) == 0) {
1260                 /*
1261                  * Now that this aggregation or DQA queue is empty tell
1262                  * mac80211 so it knows we no longer have frames buffered for
1263                  * the station on this TID (for the TIM bitmap calculation.)
1264                  */
1265                 ieee80211_sta_set_buffered(sta, tid, false);
1266         }
1267
1268         /*
1269          * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
1270          * to align the wrap around of ssn so we compare relevant values.
1271          */
1272         normalized_ssn = tid_data->ssn;
1273         if (mvm->trans->cfg->gen2)
1274                 normalized_ssn &= 0xff;
1275
1276         if (normalized_ssn != tid_data->next_reclaimed)
1277                 return;
1278
1279         switch (tid_data->state) {
1280         case IWL_EMPTYING_HW_QUEUE_ADDBA:
1281                 IWL_DEBUG_TX_QUEUES(mvm,
1282                                     "Can continue addBA flow ssn = next_recl = %d\n",
1283                                     tid_data->next_reclaimed);
1284                 tid_data->state = IWL_AGG_STARTING;
1285                 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1286                 break;
1287
1288         case IWL_EMPTYING_HW_QUEUE_DELBA:
1289                 IWL_DEBUG_TX_QUEUES(mvm,
1290                                     "Can continue DELBA flow ssn = next_recl = %d\n",
1291                                     tid_data->next_reclaimed);
1292                 tid_data->state = IWL_AGG_OFF;
1293                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1294                 break;
1295
1296         default:
1297                 break;
1298         }
1299 }
1300
1301 #ifdef CONFIG_IWLWIFI_DEBUG
1302 const char *iwl_mvm_get_tx_fail_reason(u32 status)
1303 {
1304 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
1305 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
1306
1307         switch (status & TX_STATUS_MSK) {
1308         case TX_STATUS_SUCCESS:
1309                 return "SUCCESS";
1310         TX_STATUS_POSTPONE(DELAY);
1311         TX_STATUS_POSTPONE(FEW_BYTES);
1312         TX_STATUS_POSTPONE(BT_PRIO);
1313         TX_STATUS_POSTPONE(QUIET_PERIOD);
1314         TX_STATUS_POSTPONE(CALC_TTAK);
1315         TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
1316         TX_STATUS_FAIL(SHORT_LIMIT);
1317         TX_STATUS_FAIL(LONG_LIMIT);
1318         TX_STATUS_FAIL(UNDERRUN);
1319         TX_STATUS_FAIL(DRAIN_FLOW);
1320         TX_STATUS_FAIL(RFKILL_FLUSH);
1321         TX_STATUS_FAIL(LIFE_EXPIRE);
1322         TX_STATUS_FAIL(DEST_PS);
1323         TX_STATUS_FAIL(HOST_ABORTED);
1324         TX_STATUS_FAIL(BT_RETRY);
1325         TX_STATUS_FAIL(STA_INVALID);
1326         TX_STATUS_FAIL(FRAG_DROPPED);
1327         TX_STATUS_FAIL(TID_DISABLE);
1328         TX_STATUS_FAIL(FIFO_FLUSHED);
1329         TX_STATUS_FAIL(SMALL_CF_POLL);
1330         TX_STATUS_FAIL(FW_DROP);
1331         TX_STATUS_FAIL(STA_COLOR_MISMATCH);
1332         }
1333
1334         return "UNKNOWN";
1335
1336 #undef TX_STATUS_FAIL
1337 #undef TX_STATUS_POSTPONE
1338 }
1339 #endif /* CONFIG_IWLWIFI_DEBUG */
1340
1341 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags,
1342                                enum nl80211_band band,
1343                                struct ieee80211_tx_rate *r)
1344 {
1345         if (rate_n_flags & RATE_HT_MCS_GF_MSK)
1346                 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
1347         switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
1348         case RATE_MCS_CHAN_WIDTH_20:
1349                 break;
1350         case RATE_MCS_CHAN_WIDTH_40:
1351                 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
1352                 break;
1353         case RATE_MCS_CHAN_WIDTH_80:
1354                 r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH;
1355                 break;
1356         case RATE_MCS_CHAN_WIDTH_160:
1357                 r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH;
1358                 break;
1359         }
1360         if (rate_n_flags & RATE_MCS_SGI_MSK)
1361                 r->flags |= IEEE80211_TX_RC_SHORT_GI;
1362         if (rate_n_flags & RATE_MCS_HT_MSK) {
1363                 r->flags |= IEEE80211_TX_RC_MCS;
1364                 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
1365         } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
1366                 ieee80211_rate_set_vht(
1367                         r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK,
1368                         ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
1369                                                 RATE_VHT_MCS_NSS_POS) + 1);
1370                 r->flags |= IEEE80211_TX_RC_VHT_MCS;
1371         } else {
1372                 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
1373                                                              band);
1374         }
1375 }
1376
1377 /**
1378  * translate ucode response to mac80211 tx status control values
1379  */
1380 static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags,
1381                                         struct ieee80211_tx_info *info)
1382 {
1383         struct ieee80211_tx_rate *r = &info->status.rates[0];
1384
1385         info->status.antenna =
1386                 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
1387         iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r);
1388 }
1389
1390 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm,
1391                                             u32 status)
1392 {
1393         struct iwl_fw_dbg_trigger_tlv *trig;
1394         struct iwl_fw_dbg_trigger_tx_status *status_trig;
1395         int i;
1396
1397         trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL,
1398                                      FW_DBG_TRIGGER_TX_STATUS);
1399         if (!trig)
1400                 return;
1401
1402         status_trig = (void *)trig->data;
1403
1404         for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) {
1405                 /* don't collect on status 0 */
1406                 if (!status_trig->statuses[i].status)
1407                         break;
1408
1409                 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK))
1410                         continue;
1411
1412                 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
1413                                         "Tx status %d was received",
1414                                         status & TX_STATUS_MSK);
1415                 break;
1416         }
1417 }
1418
1419 /**
1420  * iwl_mvm_get_scd_ssn - returns the SSN of the SCD
1421  * @tx_resp: the Tx response from the fw (agg or non-agg)
1422  *
1423  * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since
1424  * it can't know that everything will go well until the end of the AMPDU, it
1425  * can't know in advance the number of MPDUs that will be sent in the current
1426  * batch. This is why it writes the agg Tx response while it fetches the MPDUs.
1427  * Hence, it can't know in advance what the SSN of the SCD will be at the end
1428  * of the batch. This is why the SSN of the SCD is written at the end of the
1429  * whole struct at a variable offset. This function knows how to cope with the
1430  * variable offset and returns the SSN of the SCD.
1431  */
1432 static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm,
1433                                       struct iwl_mvm_tx_resp *tx_resp)
1434 {
1435         return le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) +
1436                             tx_resp->frame_count) & 0xfff;
1437 }
1438
1439 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm,
1440                                      struct iwl_rx_packet *pkt)
1441 {
1442         struct ieee80211_sta *sta;
1443         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1444         int txq_id = SEQ_TO_QUEUE(sequence);
1445         /* struct iwl_mvm_tx_resp_v3 is almost the same */
1446         struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1447         int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1448         int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1449         struct agg_tx_status *agg_status =
1450                 iwl_mvm_get_agg_status(mvm, tx_resp);
1451         u32 status = le16_to_cpu(agg_status->status);
1452         u16 ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp);
1453         struct sk_buff_head skbs;
1454         u8 skb_freed = 0;
1455         u8 lq_color;
1456         u16 next_reclaimed, seq_ctl;
1457         bool is_ndp = false;
1458
1459         __skb_queue_head_init(&skbs);
1460
1461         if (iwl_mvm_has_new_tx_api(mvm))
1462                 txq_id = le16_to_cpu(tx_resp->tx_queue);
1463
1464         seq_ctl = le16_to_cpu(tx_resp->seq_ctl);
1465
1466         /* we can free until ssn % q.n_bd not inclusive */
1467         iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs);
1468
1469         while (!skb_queue_empty(&skbs)) {
1470                 struct sk_buff *skb = __skb_dequeue(&skbs);
1471                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1472                 struct ieee80211_hdr *hdr = (void *)skb->data;
1473                 bool flushed = false;
1474
1475                 skb_freed++;
1476
1477                 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1478
1479                 memset(&info->status, 0, sizeof(info->status));
1480
1481                 /* inform mac80211 about what happened with the frame */
1482                 switch (status & TX_STATUS_MSK) {
1483                 case TX_STATUS_SUCCESS:
1484                 case TX_STATUS_DIRECT_DONE:
1485                         info->flags |= IEEE80211_TX_STAT_ACK;
1486                         break;
1487                 case TX_STATUS_FAIL_FIFO_FLUSHED:
1488                 case TX_STATUS_FAIL_DRAIN_FLOW:
1489                         flushed = true;
1490                         break;
1491                 case TX_STATUS_FAIL_DEST_PS:
1492                         /* the FW should have stopped the queue and not
1493                          * return this status
1494                          */
1495                         WARN_ON(1);
1496                         info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
1497                         break;
1498                 default:
1499                         break;
1500                 }
1501
1502                 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS &&
1503                     ieee80211_is_mgmt(hdr->frame_control))
1504                         iwl_mvm_toggle_tx_ant(mvm, &mvm->mgmt_last_antenna_idx);
1505
1506                 /*
1507                  * If we are freeing multiple frames, mark all the frames
1508                  * but the first one as acked, since they were acknowledged
1509                  * before
1510                  * */
1511                 if (skb_freed > 1)
1512                         info->flags |= IEEE80211_TX_STAT_ACK;
1513
1514                 iwl_mvm_tx_status_check_trigger(mvm, status);
1515
1516                 info->status.rates[0].count = tx_resp->failure_frame + 1;
1517                 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate),
1518                                             info);
1519                 info->status.status_driver_data[1] =
1520                         (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate);
1521
1522                 /* Single frame failure in an AMPDU queue => send BAR */
1523                 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
1524                     !(info->flags & IEEE80211_TX_STAT_ACK) &&
1525                     !(info->flags & IEEE80211_TX_STAT_TX_FILTERED) && !flushed)
1526                         info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1527                 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1528
1529                 /* W/A FW bug: seq_ctl is wrong upon failure / BAR frame */
1530                 if (ieee80211_is_back_req(hdr->frame_control))
1531                         seq_ctl = 0;
1532                 else if (status != TX_STATUS_SUCCESS)
1533                         seq_ctl = le16_to_cpu(hdr->seq_ctrl);
1534
1535                 if (unlikely(!seq_ctl)) {
1536                         struct ieee80211_hdr *hdr = (void *)skb->data;
1537
1538                         /*
1539                          * If it is an NDP, we can't update next_reclaim since
1540                          * its sequence control is 0. Note that for that same
1541                          * reason, NDPs are never sent to A-MPDU'able queues
1542                          * so that we can never have more than one freed frame
1543                          * for a single Tx resonse (see WARN_ON below).
1544                          */
1545                         if (ieee80211_is_qos_nullfunc(hdr->frame_control))
1546                                 is_ndp = true;
1547                 }
1548
1549                 /*
1550                  * TODO: this is not accurate if we are freeing more than one
1551                  * packet.
1552                  */
1553                 info->status.tx_time =
1554                         le16_to_cpu(tx_resp->wireless_media_time);
1555                 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1);
1556                 lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info);
1557                 info->status.status_driver_data[0] =
1558                         RS_DRV_DATA_PACK(lq_color, tx_resp->reduced_tpc);
1559
1560                 ieee80211_tx_status(mvm->hw, skb);
1561         }
1562
1563         /* This is an aggregation queue or might become one, so we use
1564          * the ssn since: ssn = wifi seq_num % 256.
1565          * The seq_ctl is the sequence control of the packet to which
1566          * this Tx response relates. But if there is a hole in the
1567          * bitmap of the BA we received, this Tx response may allow to
1568          * reclaim the hole and all the subsequent packets that were
1569          * already acked. In that case, seq_ctl != ssn, and the next
1570          * packet to be reclaimed will be ssn and not seq_ctl. In that
1571          * case, several packets will be reclaimed even if
1572          * frame_count = 1.
1573          *
1574          * The ssn is the index (% 256) of the latest packet that has
1575          * treated (acked / dropped) + 1.
1576          */
1577         next_reclaimed = ssn;
1578
1579         IWL_DEBUG_TX_REPLY(mvm,
1580                            "TXQ %d status %s (0x%08x)\n",
1581                            txq_id, iwl_mvm_get_tx_fail_reason(status), status);
1582
1583         IWL_DEBUG_TX_REPLY(mvm,
1584                            "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
1585                            le32_to_cpu(tx_resp->initial_rate),
1586                            tx_resp->failure_frame, SEQ_TO_INDEX(sequence),
1587                            ssn, next_reclaimed, seq_ctl);
1588
1589         rcu_read_lock();
1590
1591         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1592         /*
1593          * sta can't be NULL otherwise it'd mean that the sta has been freed in
1594          * the firmware while we still have packets for it in the Tx queues.
1595          */
1596         if (WARN_ON_ONCE(!sta))
1597                 goto out;
1598
1599         if (!IS_ERR(sta)) {
1600                 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1601
1602                 iwl_mvm_tx_airtime(mvm, mvmsta,
1603                                    le16_to_cpu(tx_resp->wireless_media_time));
1604
1605                 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS &&
1606                     mvmsta->sta_state < IEEE80211_STA_AUTHORIZED)
1607                         iwl_mvm_toggle_tx_ant(mvm, &mvmsta->tx_ant);
1608
1609                 if (sta->wme && tid != IWL_MGMT_TID) {
1610                         struct iwl_mvm_tid_data *tid_data =
1611                                 &mvmsta->tid_data[tid];
1612                         bool send_eosp_ndp = false;
1613
1614                         spin_lock_bh(&mvmsta->lock);
1615
1616                         if (!is_ndp) {
1617                                 tid_data->next_reclaimed = next_reclaimed;
1618                                 IWL_DEBUG_TX_REPLY(mvm,
1619                                                    "Next reclaimed packet:%d\n",
1620                                                    next_reclaimed);
1621                         } else {
1622                                 IWL_DEBUG_TX_REPLY(mvm,
1623                                                    "NDP - don't update next_reclaimed\n");
1624                         }
1625
1626                         iwl_mvm_check_ratid_empty(mvm, sta, tid);
1627
1628                         if (mvmsta->sleep_tx_count) {
1629                                 mvmsta->sleep_tx_count--;
1630                                 if (mvmsta->sleep_tx_count &&
1631                                     !iwl_mvm_tid_queued(mvm, tid_data)) {
1632                                         /*
1633                                          * The number of frames in the queue
1634                                          * dropped to 0 even if we sent less
1635                                          * frames than we thought we had on the
1636                                          * Tx queue.
1637                                          * This means we had holes in the BA
1638                                          * window that we just filled, ask
1639                                          * mac80211 to send EOSP since the
1640                                          * firmware won't know how to do that.
1641                                          * Send NDP and the firmware will send
1642                                          * EOSP notification that will trigger
1643                                          * a call to ieee80211_sta_eosp().
1644                                          */
1645                                         send_eosp_ndp = true;
1646                                 }
1647                         }
1648
1649                         spin_unlock_bh(&mvmsta->lock);
1650                         if (send_eosp_ndp) {
1651                                 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta,
1652                                         IEEE80211_FRAME_RELEASE_UAPSD,
1653                                         1, tid, false, false);
1654                                 mvmsta->sleep_tx_count = 0;
1655                                 ieee80211_send_eosp_nullfunc(sta, tid);
1656                         }
1657                 }
1658
1659                 if (mvmsta->next_status_eosp) {
1660                         mvmsta->next_status_eosp = false;
1661                         ieee80211_sta_eosp(sta);
1662                 }
1663         }
1664 out:
1665         rcu_read_unlock();
1666 }
1667
1668 #ifdef CONFIG_IWLWIFI_DEBUG
1669 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
1670 static const char *iwl_get_agg_tx_status(u16 status)
1671 {
1672         switch (status & AGG_TX_STATE_STATUS_MSK) {
1673         AGG_TX_STATE_(TRANSMITTED);
1674         AGG_TX_STATE_(UNDERRUN);
1675         AGG_TX_STATE_(BT_PRIO);
1676         AGG_TX_STATE_(FEW_BYTES);
1677         AGG_TX_STATE_(ABORT);
1678         AGG_TX_STATE_(TX_ON_AIR_DROP);
1679         AGG_TX_STATE_(LAST_SENT_TRY_CNT);
1680         AGG_TX_STATE_(LAST_SENT_BT_KILL);
1681         AGG_TX_STATE_(SCD_QUERY);
1682         AGG_TX_STATE_(TEST_BAD_CRC32);
1683         AGG_TX_STATE_(RESPONSE);
1684         AGG_TX_STATE_(DUMP_TX);
1685         AGG_TX_STATE_(DELAY_TX);
1686         }
1687
1688         return "UNKNOWN";
1689 }
1690
1691 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1692                                       struct iwl_rx_packet *pkt)
1693 {
1694         struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1695         struct agg_tx_status *frame_status =
1696                 iwl_mvm_get_agg_status(mvm, tx_resp);
1697         int i;
1698
1699         for (i = 0; i < tx_resp->frame_count; i++) {
1700                 u16 fstatus = le16_to_cpu(frame_status[i].status);
1701
1702                 IWL_DEBUG_TX_REPLY(mvm,
1703                                    "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
1704                                    iwl_get_agg_tx_status(fstatus),
1705                                    fstatus & AGG_TX_STATE_STATUS_MSK,
1706                                    (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >>
1707                                         AGG_TX_STATE_TRY_CNT_POS,
1708                                    le16_to_cpu(frame_status[i].sequence));
1709         }
1710 }
1711 #else
1712 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1713                                       struct iwl_rx_packet *pkt)
1714 {}
1715 #endif /* CONFIG_IWLWIFI_DEBUG */
1716
1717 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm,
1718                                   struct iwl_rx_packet *pkt)
1719 {
1720         struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1721         int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1722         int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1723         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1724         struct iwl_mvm_sta *mvmsta;
1725         int queue = SEQ_TO_QUEUE(sequence);
1726         struct ieee80211_sta *sta;
1727
1728         if (WARN_ON_ONCE(queue < IWL_MVM_DQA_MIN_DATA_QUEUE &&
1729                          (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)))
1730                 return;
1731
1732         iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt);
1733
1734         rcu_read_lock();
1735
1736         mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1737
1738         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1739         if (WARN_ON_ONCE(!sta || !sta->wme)) {
1740                 rcu_read_unlock();
1741                 return;
1742         }
1743
1744         if (!WARN_ON_ONCE(!mvmsta)) {
1745                 mvmsta->tid_data[tid].rate_n_flags =
1746                         le32_to_cpu(tx_resp->initial_rate);
1747                 mvmsta->tid_data[tid].tx_time =
1748                         le16_to_cpu(tx_resp->wireless_media_time);
1749                 mvmsta->tid_data[tid].lq_color =
1750                         TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info);
1751                 iwl_mvm_tx_airtime(mvm, mvmsta,
1752                                    le16_to_cpu(tx_resp->wireless_media_time));
1753         }
1754
1755         rcu_read_unlock();
1756 }
1757
1758 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1759 {
1760         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1761         struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1762
1763         if (tx_resp->frame_count == 1)
1764                 iwl_mvm_rx_tx_cmd_single(mvm, pkt);
1765         else
1766                 iwl_mvm_rx_tx_cmd_agg(mvm, pkt);
1767 }
1768
1769 static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid,
1770                                int txq, int index,
1771                                struct ieee80211_tx_info *ba_info, u32 rate)
1772 {
1773         struct sk_buff_head reclaimed_skbs;
1774         struct iwl_mvm_tid_data *tid_data;
1775         struct ieee80211_sta *sta;
1776         struct iwl_mvm_sta *mvmsta;
1777         struct sk_buff *skb;
1778         int freed;
1779
1780         if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT ||
1781                       tid > IWL_MAX_TID_COUNT,
1782                       "sta_id %d tid %d", sta_id, tid))
1783                 return;
1784
1785         rcu_read_lock();
1786
1787         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1788
1789         /* Reclaiming frames for a station that has been deleted ? */
1790         if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
1791                 rcu_read_unlock();
1792                 return;
1793         }
1794
1795         mvmsta = iwl_mvm_sta_from_mac80211(sta);
1796         tid_data = &mvmsta->tid_data[tid];
1797
1798         if (tid_data->txq_id != txq) {
1799                 IWL_ERR(mvm,
1800                         "invalid BA notification: Q %d, tid %d\n",
1801                         tid_data->txq_id, tid);
1802                 rcu_read_unlock();
1803                 return;
1804         }
1805
1806         __skb_queue_head_init(&reclaimed_skbs);
1807
1808         /*
1809          * Release all TFDs before the SSN, i.e. all TFDs in front of
1810          * block-ack window (we assume that they've been successfully
1811          * transmitted ... if not, it's too late anyway).
1812          */
1813         iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs);
1814
1815         spin_lock_bh(&mvmsta->lock);
1816
1817         tid_data->next_reclaimed = index;
1818
1819         iwl_mvm_check_ratid_empty(mvm, sta, tid);
1820
1821         freed = 0;
1822
1823         /* pack lq color from tid_data along the reduced txp */
1824         ba_info->status.status_driver_data[0] =
1825                 RS_DRV_DATA_PACK(tid_data->lq_color,
1826                                  ba_info->status.status_driver_data[0]);
1827         ba_info->status.status_driver_data[1] = (void *)(uintptr_t)rate;
1828
1829         skb_queue_walk(&reclaimed_skbs, skb) {
1830                 struct ieee80211_hdr *hdr = (void *)skb->data;
1831                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1832
1833                 if (ieee80211_is_data_qos(hdr->frame_control))
1834                         freed++;
1835                 else
1836                         WARN_ON_ONCE(tid != IWL_MAX_TID_COUNT);
1837
1838                 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1839
1840                 memset(&info->status, 0, sizeof(info->status));
1841                 /* Packet was transmitted successfully, failures come as single
1842                  * frames because before failing a frame the firmware transmits
1843                  * it without aggregation at least once.
1844                  */
1845                 info->flags |= IEEE80211_TX_STAT_ACK;
1846
1847                 /* this is the first skb we deliver in this batch */
1848                 /* put the rate scaling data there */
1849                 if (freed == 1) {
1850                         info->flags |= IEEE80211_TX_STAT_AMPDU;
1851                         memcpy(&info->status, &ba_info->status,
1852                                sizeof(ba_info->status));
1853                         iwl_mvm_hwrate_to_tx_status(rate, info);
1854                 }
1855         }
1856
1857         spin_unlock_bh(&mvmsta->lock);
1858
1859         /* We got a BA notif with 0 acked or scd_ssn didn't progress which is
1860          * possible (i.e. first MPDU in the aggregation wasn't acked)
1861          * Still it's important to update RS about sent vs. acked.
1862          */
1863         if (skb_queue_empty(&reclaimed_skbs)) {
1864                 struct ieee80211_chanctx_conf *chanctx_conf = NULL;
1865
1866                 if (mvmsta->vif)
1867                         chanctx_conf =
1868                                 rcu_dereference(mvmsta->vif->chanctx_conf);
1869
1870                 if (WARN_ON_ONCE(!chanctx_conf))
1871                         goto out;
1872
1873                 ba_info->band = chanctx_conf->def.chan->band;
1874                 iwl_mvm_hwrate_to_tx_status(rate, ba_info);
1875
1876                 if (!iwl_mvm_has_tlc_offload(mvm)) {
1877                         IWL_DEBUG_TX_REPLY(mvm,
1878                                            "No reclaim. Update rs directly\n");
1879                         iwl_mvm_rs_tx_status(mvm, sta, tid, ba_info, false);
1880                 }
1881         }
1882
1883 out:
1884         rcu_read_unlock();
1885
1886         while (!skb_queue_empty(&reclaimed_skbs)) {
1887                 skb = __skb_dequeue(&reclaimed_skbs);
1888                 ieee80211_tx_status(mvm->hw, skb);
1889         }
1890 }
1891
1892 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1893 {
1894         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1895         int sta_id, tid, txq, index;
1896         struct ieee80211_tx_info ba_info = {};
1897         struct iwl_mvm_ba_notif *ba_notif;
1898         struct iwl_mvm_tid_data *tid_data;
1899         struct iwl_mvm_sta *mvmsta;
1900
1901         ba_info.flags = IEEE80211_TX_STAT_AMPDU;
1902
1903         if (iwl_mvm_has_new_tx_api(mvm)) {
1904                 struct iwl_mvm_compressed_ba_notif *ba_res =
1905                         (void *)pkt->data;
1906                 u8 lq_color = TX_RES_RATE_TABLE_COL_GET(ba_res->tlc_rate_info);
1907                 int i;
1908
1909                 sta_id = ba_res->sta_id;
1910                 ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done);
1911                 ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed);
1912                 ba_info.status.tx_time =
1913                         (u16)le32_to_cpu(ba_res->wireless_time);
1914                 ba_info.status.status_driver_data[0] =
1915                         (void *)(uintptr_t)ba_res->reduced_txp;
1916
1917                 if (!le16_to_cpu(ba_res->tfd_cnt))
1918                         goto out;
1919
1920                 rcu_read_lock();
1921
1922                 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1923                 if (!mvmsta)
1924                         goto out_unlock;
1925
1926                 /* Free per TID */
1927                 for (i = 0; i < le16_to_cpu(ba_res->tfd_cnt); i++) {
1928                         struct iwl_mvm_compressed_ba_tfd *ba_tfd =
1929                                 &ba_res->tfd[i];
1930
1931                         tid = ba_tfd->tid;
1932                         if (tid == IWL_MGMT_TID)
1933                                 tid = IWL_MAX_TID_COUNT;
1934
1935                         mvmsta->tid_data[i].lq_color = lq_color;
1936                         iwl_mvm_tx_reclaim(mvm, sta_id, tid,
1937                                            (int)(le16_to_cpu(ba_tfd->q_num)),
1938                                            le16_to_cpu(ba_tfd->tfd_index),
1939                                            &ba_info,
1940                                            le32_to_cpu(ba_res->tx_rate));
1941                 }
1942
1943                 iwl_mvm_tx_airtime(mvm, mvmsta,
1944                                    le32_to_cpu(ba_res->wireless_time));
1945 out_unlock:
1946                 rcu_read_unlock();
1947 out:
1948                 IWL_DEBUG_TX_REPLY(mvm,
1949                                    "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n",
1950                                    sta_id, le32_to_cpu(ba_res->flags),
1951                                    le16_to_cpu(ba_res->txed),
1952                                    le16_to_cpu(ba_res->done));
1953                 return;
1954         }
1955
1956         ba_notif = (void *)pkt->data;
1957         sta_id = ba_notif->sta_id;
1958         tid = ba_notif->tid;
1959         /* "flow" corresponds to Tx queue */
1960         txq = le16_to_cpu(ba_notif->scd_flow);
1961         /* "ssn" is start of block-ack Tx window, corresponds to index
1962          * (in Tx queue's circular buffer) of first TFD/frame in window */
1963         index = le16_to_cpu(ba_notif->scd_ssn);
1964
1965         rcu_read_lock();
1966         mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1967         if (WARN_ON_ONCE(!mvmsta)) {
1968                 rcu_read_unlock();
1969                 return;
1970         }
1971
1972         tid_data = &mvmsta->tid_data[tid];
1973
1974         ba_info.status.ampdu_ack_len = ba_notif->txed_2_done;
1975         ba_info.status.ampdu_len = ba_notif->txed;
1976         ba_info.status.tx_time = tid_data->tx_time;
1977         ba_info.status.status_driver_data[0] =
1978                 (void *)(uintptr_t)ba_notif->reduced_txp;
1979
1980         rcu_read_unlock();
1981
1982         iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info,
1983                            tid_data->rate_n_flags);
1984
1985         IWL_DEBUG_TX_REPLY(mvm,
1986                            "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
1987                            ba_notif->sta_addr, ba_notif->sta_id);
1988
1989         IWL_DEBUG_TX_REPLY(mvm,
1990                            "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
1991                            ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl),
1992                            le64_to_cpu(ba_notif->bitmap), txq, index,
1993                            ba_notif->txed, ba_notif->txed_2_done);
1994
1995         IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n",
1996                            ba_notif->reduced_txp);
1997 }
1998
1999 /*
2000  * Note that there are transports that buffer frames before they reach
2001  * the firmware. This means that after flush_tx_path is called, the
2002  * queue might not be empty. The race-free way to handle this is to:
2003  * 1) set the station as draining
2004  * 2) flush the Tx path
2005  * 3) wait for the transport queues to be empty
2006  */
2007 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, u32 flags)
2008 {
2009         int ret;
2010         struct iwl_tx_path_flush_cmd_v1 flush_cmd = {
2011                 .queues_ctl = cpu_to_le32(tfd_msk),
2012                 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH),
2013         };
2014
2015         WARN_ON(iwl_mvm_has_new_tx_api(mvm));
2016
2017         ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags,
2018                                    sizeof(flush_cmd), &flush_cmd);
2019         if (ret)
2020                 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
2021         return ret;
2022 }
2023
2024 int iwl_mvm_flush_sta_tids(struct iwl_mvm *mvm, u32 sta_id,
2025                            u16 tids, u32 flags)
2026 {
2027         int ret;
2028         struct iwl_tx_path_flush_cmd flush_cmd = {
2029                 .sta_id = cpu_to_le32(sta_id),
2030                 .tid_mask = cpu_to_le16(tids),
2031         };
2032
2033         WARN_ON(!iwl_mvm_has_new_tx_api(mvm));
2034
2035         ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags,
2036                                    sizeof(flush_cmd), &flush_cmd);
2037         if (ret)
2038                 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
2039         return ret;
2040 }
2041
2042 int iwl_mvm_flush_sta(struct iwl_mvm *mvm, void *sta, bool internal, u32 flags)
2043 {
2044         struct iwl_mvm_int_sta *int_sta = sta;
2045         struct iwl_mvm_sta *mvm_sta = sta;
2046
2047         BUILD_BUG_ON(offsetof(struct iwl_mvm_int_sta, sta_id) !=
2048                      offsetof(struct iwl_mvm_sta, sta_id));
2049
2050         if (iwl_mvm_has_new_tx_api(mvm))
2051                 return iwl_mvm_flush_sta_tids(mvm, mvm_sta->sta_id,
2052                                               0xff | BIT(IWL_MGMT_TID), flags);
2053
2054         if (internal)
2055                 return iwl_mvm_flush_tx_path(mvm, int_sta->tfd_queue_msk,
2056                                              flags);
2057
2058         return iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, flags);
2059 }