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  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of version 2 of the GNU General Public License as
  14  * published by the Free Software Foundation.
  15  *
  16  * This program is distributed in the hope that it will be useful, but
  17  * WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19  * General Public License for more details.
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  22  * along with this program; if not, write to the Free Software
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  24  * USA
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  27  * in the file called COPYING.
  28  *
  29  * Contact Information:
  30  *  Intel Linux Wireless <linuxwifi@intel.com>
  31  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  32  *
  33  * BSD LICENSE
  34  *
  35  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  36  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
  37  * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
  38  * All rights reserved.
  39  *
  40  * Redistribution and use in source and binary forms, with or without
  41  * modification, are permitted provided that the following conditions
  42  * are met:
  43  *
  44  *  * Redistributions of source code must retain the above copyright
  45  *    notice, this list of conditions and the following disclaimer.
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  47  *    notice, this list of conditions and the following disclaimer in
  48  *    the documentation and/or other materials provided with the
  49  *    distribution.
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  51  *    contributors may be used to endorse or promote products derived
  52  *    from this software without specific prior written permission.
  53  *
  54  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  55  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  56  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  57  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  58  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  59  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  60  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  61  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  62  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  63  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  64  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  65  *
  66  *****************************************************************************/
  67 #include <linux/ieee80211.h>
  68 #include <linux/etherdevice.h>
  69 #include <linux/tcp.h>
  70 #include <net/ip.h>
  71 #include <net/ipv6.h>
  72
  73 #include "iwl-trans.h"
  74 #include "iwl-eeprom-parse.h"
  75 #include "mvm.h"
  76 #include "sta.h"
  77
  78 static void
  79 iwl_mvm_bar_check_trigger(struct iwl_mvm *mvm, const u8 *addr,
  80                           u16 tid, u16 ssn)
  81 {
  82         struct iwl_fw_dbg_trigger_tlv *trig;
  83         struct iwl_fw_dbg_trigger_ba *ba_trig;
  84
  85         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
  86                 return;
  87
  88         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
  89         ba_trig = (void *)trig->data;
  90
  91         if (!iwl_fw_dbg_trigger_check_stop(&mvm->fwrt, NULL, trig))
  92                 return;
  93
  94         if (!(le16_to_cpu(ba_trig->tx_bar) & BIT(tid)))
  95                 return;
  96
  97         iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
  98                                 "BAR sent to %pM, tid %d, ssn %d",
  99                                 addr, tid, ssn);
 100 }
 101
 102 #define OPT_HDR(type, skb, off) \
 103         (type *)(skb_network_header(skb) + (off))
 104
 105 static u16 iwl_mvm_tx_csum(struct iwl_mvm *mvm, struct sk_buff *skb,
 106                            struct ieee80211_hdr *hdr,
 107                            struct ieee80211_tx_info *info,
 108                            u16 offload_assist)
 109 {
 110 #if IS_ENABLED(CONFIG_INET)
 111         u16 mh_len = ieee80211_hdrlen(hdr->frame_control);
 112         u8 protocol = 0;
 113
 114         /*
 115          * Do not compute checksum if already computed or if transport will
 116          * compute it
 117          */
 118         if (skb->ip_summed != CHECKSUM_PARTIAL || IWL_MVM_SW_TX_CSUM_OFFLOAD)
 119                 goto out;
 120
 121         /* We do not expect to be requested to csum stuff we do not support */
 122         if (WARN_ONCE(!(mvm->hw->netdev_features & IWL_TX_CSUM_NETIF_FLAGS) ||
 123                       (skb->protocol != htons(ETH_P_IP) &&
 124                        skb->protocol != htons(ETH_P_IPV6)),
 125                       "No support for requested checksum\n")) {
 126                 skb_checksum_help(skb);
 127                 goto out;
 128         }
 129
 130         if (skb->protocol == htons(ETH_P_IP)) {
 131                 protocol = ip_hdr(skb)->protocol;
 132         } else {
 133 #if IS_ENABLED(CONFIG_IPV6)
 134                 struct ipv6hdr *ipv6h =
 135                         (struct ipv6hdr *)skb_network_header(skb);
 136                 unsigned int off = sizeof(*ipv6h);
 137
 138                 protocol = ipv6h->nexthdr;
 139                 while (protocol != NEXTHDR_NONE && ipv6_ext_hdr(protocol)) {
 140                         struct ipv6_opt_hdr *hp;
 141
 142                         /* only supported extension headers */
 143                         if (protocol != NEXTHDR_ROUTING &&
 144                             protocol != NEXTHDR_HOP &&
 145                             protocol != NEXTHDR_DEST) {
 146                                 skb_checksum_help(skb);
 147                                 goto out;
 148                         }
 149
 150                         hp = OPT_HDR(struct ipv6_opt_hdr, skb, off);
 151                         protocol = hp->nexthdr;
 152                         off += ipv6_optlen(hp);
 153                 }
 154                 /* if we get here - protocol now should be TCP/UDP */
 155 #endif
 156         }
 157
 158         if (protocol != IPPROTO_TCP && protocol != IPPROTO_UDP) {
 159                 WARN_ON_ONCE(1);
 160                 skb_checksum_help(skb);
 161                 goto out;
 162         }
 163
 164         /* enable L4 csum */
 165         offload_assist |= BIT(TX_CMD_OFFLD_L4_EN);
 166
 167         /*
 168          * Set offset to IP header (snap).
 169          * We don't support tunneling so no need to take care of inner header.
 170          * Size is in words.
 171          */
 172         offload_assist |= (4 << TX_CMD_OFFLD_IP_HDR);
 173
 174         /* Do IPv4 csum for AMSDU only (no IP csum for Ipv6) */
 175         if (skb->protocol == htons(ETH_P_IP) &&
 176             (offload_assist & BIT(TX_CMD_OFFLD_AMSDU))) {
 177                 ip_hdr(skb)->check = 0;
 178                 offload_assist |= BIT(TX_CMD_OFFLD_L3_EN);
 179         }
 180
 181         /* reset UDP/TCP header csum */
 182         if (protocol == IPPROTO_TCP)
 183                 tcp_hdr(skb)->check = 0;
 184         else
 185                 udp_hdr(skb)->check = 0;
 186
 187         /*
 188          * mac header len should include IV, size is in words unless
 189          * the IV is added by the firmware like in WEP.
 190          * In new Tx API, the IV is always added by the firmware.
 191          */
 192         if (!iwl_mvm_has_new_tx_api(mvm) && info->control.hw_key &&
 193             info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP40 &&
 194             info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP104)
 195                 mh_len += info->control.hw_key->iv_len;
 196         mh_len /= 2;
 197         offload_assist |= mh_len << TX_CMD_OFFLD_MH_SIZE;
 198
 199 out:
 200 #endif
 201         return offload_assist;
 202 }
 203
 204 /*
 205  * Sets most of the Tx cmd's fields
 206  */
 207 void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb,
 208                         struct iwl_tx_cmd *tx_cmd,
 209                         struct ieee80211_tx_info *info, u8 sta_id)
 210 {
 211         struct ieee80211_hdr *hdr = (void *)skb->data;
 212         __le16 fc = hdr->frame_control;
 213         u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags);
 214         u32 len = skb->len + FCS_LEN;
 215         u16 offload_assist = 0;
 216         u8 ac;
 217
 218         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
 219                 tx_flags |= TX_CMD_FLG_ACK;
 220         else
 221                 tx_flags &= ~TX_CMD_FLG_ACK;
 222
 223         if (ieee80211_is_probe_resp(fc))
 224                 tx_flags |= TX_CMD_FLG_TSF;
 225
 226         if (ieee80211_has_morefrags(fc))
 227                 tx_flags |= TX_CMD_FLG_MORE_FRAG;
 228
 229         if (ieee80211_is_data_qos(fc)) {
 230                 u8 *qc = ieee80211_get_qos_ctl(hdr);
 231                 tx_cmd->tid_tspec = qc[0] & 0xf;
 232                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
 233                 if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT)
 234                         offload_assist |= BIT(TX_CMD_OFFLD_AMSDU);
 235         } else if (ieee80211_is_back_req(fc)) {
 236                 struct ieee80211_bar *bar = (void *)skb->data;
 237                 u16 control = le16_to_cpu(bar->control);
 238                 u16 ssn = le16_to_cpu(bar->start_seq_num);
 239
 240                 tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR;
 241                 tx_cmd->tid_tspec = (control &
 242                                      IEEE80211_BAR_CTRL_TID_INFO_MASK) >>
 243                         IEEE80211_BAR_CTRL_TID_INFO_SHIFT;
 244                 WARN_ON_ONCE(tx_cmd->tid_tspec >= IWL_MAX_TID_COUNT);
 245                 iwl_mvm_bar_check_trigger(mvm, bar->ra, tx_cmd->tid_tspec,
 246                                           ssn);
 247         } else {
 248                 tx_cmd->tid_tspec = IWL_TID_NON_QOS;
 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_TID_NON_QOS */
 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(ieee80211_get_DA(hdr)))
 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_rate(struct iwl_mvm *mvm,
 308                                struct ieee80211_tx_info *info,
 309                                struct ieee80211_sta *sta)
 310 {
 311         int rate_idx;
 312         u8 rate_plcp;
 313         u32 rate_flags;
 314
 315         /* HT rate doesn't make sense for a non data frame */
 316         WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS,
 317                   "Got an HT rate (flags:0x%x/mcs:%d) for a non data frame\n",
 318                   info->control.rates[0].flags,
 319                   info->control.rates[0].idx);
 320
 321         rate_idx = info->control.rates[0].idx;
 322         /* if the rate isn't a well known legacy rate, take the lowest one */
 323         if (rate_idx < 0 || rate_idx >= IWL_RATE_COUNT_LEGACY)
 324                 rate_idx = rate_lowest_index(
 325                                 &mvm->nvm_data->bands[info->band], sta);
 326
 327         /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
 328         if (info->band == NL80211_BAND_5GHZ)
 329                 rate_idx += IWL_FIRST_OFDM_RATE;
 330
 331         /* For 2.4 GHZ band, check that there is no need to remap */
 332         BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
 333
 334         /* Get PLCP rate for tx_cmd->rate_n_flags */
 335         rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(rate_idx);
 336
 337         if (info->band == NL80211_BAND_2GHZ &&
 338             !iwl_mvm_bt_coex_is_shared_ant_avail(mvm))
 339                 rate_flags = mvm->cfg->non_shared_ant << RATE_MCS_ANT_POS;
 340         else
 341                 rate_flags =
 342                         BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS;
 343
 344         /* Set CCK flag as needed */
 345         if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
 346                 rate_flags |= RATE_MCS_CCK_MSK;
 347
 348         return (u32)rate_plcp | rate_flags;
 349 }
 350
 351 /*
 352  * Sets the fields in the Tx cmd that are rate related
 353  */
 354 void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd,
 355                             struct ieee80211_tx_info *info,
 356                             struct ieee80211_sta *sta, __le16 fc)
 357 {
 358         /* Set retry limit on RTS packets */
 359         tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT;
 360
 361         /* Set retry limit on DATA packets and Probe Responses*/
 362         if (ieee80211_is_probe_resp(fc)) {
 363                 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT;
 364                 tx_cmd->rts_retry_limit =
 365                         min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit);
 366         } else if (ieee80211_is_back_req(fc)) {
 367                 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT;
 368         } else {
 369                 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY;
 370         }
 371
 372         /*
 373          * for data packets, rate info comes from the table inside the fw. This
 374          * table is controlled by LINK_QUALITY commands
 375          */
 376
 377         if (ieee80211_is_data(fc) && sta) {
 378                 tx_cmd->initial_rate_index = 0;
 379                 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE);
 380                 return;
 381         } else if (ieee80211_is_back_req(fc)) {
 382                 tx_cmd->tx_flags |=
 383                         cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR);
 384         }
 385
 386         mvm->mgmt_last_antenna_idx =
 387                 iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm),
 388                                      mvm->mgmt_last_antenna_idx);
 389
 390         /* Set the rate in the TX cmd */
 391         tx_cmd->rate_n_flags = cpu_to_le32(iwl_mvm_get_tx_rate(mvm, info, sta));
 392 }
 393
 394 static inline void iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info *info,
 395                                          u8 *crypto_hdr)
 396 {
 397         struct ieee80211_key_conf *keyconf = info->control.hw_key;
 398         u64 pn;
 399
 400         pn = atomic64_inc_return(&keyconf->tx_pn);
 401         crypto_hdr[0] = pn;
 402         crypto_hdr[2] = 0;
 403         crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6);
 404         crypto_hdr[1] = pn >> 8;
 405         crypto_hdr[4] = pn >> 16;
 406         crypto_hdr[5] = pn >> 24;
 407         crypto_hdr[6] = pn >> 32;
 408         crypto_hdr[7] = pn >> 40;
 409 }
 410
 411 /*
 412  * Sets the fields in the Tx cmd that are crypto related
 413  */
 414 static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm,
 415                                       struct ieee80211_tx_info *info,
 416                                       struct iwl_tx_cmd *tx_cmd,
 417                                       struct sk_buff *skb_frag,
 418                                       int hdrlen)
 419 {
 420         struct ieee80211_key_conf *keyconf = info->control.hw_key;
 421         u8 *crypto_hdr = skb_frag->data + hdrlen;
 422         enum iwl_tx_cmd_sec_ctrl type = TX_CMD_SEC_CCM;
 423         u64 pn;
 424
 425         switch (keyconf->cipher) {
 426         case WLAN_CIPHER_SUITE_CCMP:
 427                 iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd);
 428                 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr);
 429                 break;
 430
 431         case WLAN_CIPHER_SUITE_TKIP:
 432                 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
 433                 pn = atomic64_inc_return(&keyconf->tx_pn);
 434                 ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn);
 435                 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
 436                 break;
 437
 438         case WLAN_CIPHER_SUITE_WEP104:
 439                 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
 440                 /* fall through */
 441         case WLAN_CIPHER_SUITE_WEP40:
 442                 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP |
 443                         ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) &
 444                           TX_CMD_SEC_WEP_KEY_IDX_MSK);
 445
 446                 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
 447                 break;
 448         case WLAN_CIPHER_SUITE_GCMP:
 449         case WLAN_CIPHER_SUITE_GCMP_256:
 450                 type = TX_CMD_SEC_GCMP;
 451                 /* Fall through */
 452         case WLAN_CIPHER_SUITE_CCMP_256:
 453                 /* TODO: Taking the key from the table might introduce a race
 454                  * when PTK rekeying is done, having an old packets with a PN
 455                  * based on the old key but the message encrypted with a new
 456                  * one.
 457                  * Need to handle this.
 458                  */
 459                 tx_cmd->sec_ctl |= type | TX_CMD_SEC_KEY_FROM_TABLE;
 460                 tx_cmd->key[0] = keyconf->hw_key_idx;
 461                 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr);
 462                 break;
 463         default:
 464                 tx_cmd->sec_ctl |= TX_CMD_SEC_EXT;
 465         }
 466 }
 467
 468 /*
 469  * Allocates and sets the Tx cmd the driver data pointers in the skb
 470  */
 471 static struct iwl_device_cmd *
 472 iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb,
 473                       struct ieee80211_tx_info *info, int hdrlen,
 474                       struct ieee80211_sta *sta, u8 sta_id)
 475 {
 476         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 477         struct iwl_device_cmd *dev_cmd;
 478         struct iwl_tx_cmd *tx_cmd;
 479
 480         dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans);
 481
 482         if (unlikely(!dev_cmd))
 483                 return NULL;
 484
 485         /* Make sure we zero enough of dev_cmd */
 486         BUILD_BUG_ON(sizeof(struct iwl_tx_cmd_gen2) > sizeof(*tx_cmd));
 487         BUILD_BUG_ON(sizeof(struct iwl_tx_cmd_gen3) > sizeof(*tx_cmd));
 488
 489         memset(dev_cmd, 0, sizeof(dev_cmd->hdr) + sizeof(*tx_cmd));
 490         dev_cmd->hdr.cmd = TX_CMD;
 491
 492         if (iwl_mvm_has_new_tx_api(mvm)) {
 493                 u16 offload_assist = 0;
 494                 u32 rate_n_flags = 0;
 495                 u16 flags = 0;
 496
 497                 if (ieee80211_is_data_qos(hdr->frame_control)) {
 498                         u8 *qc = ieee80211_get_qos_ctl(hdr);
 499
 500                         if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT)
 501                                 offload_assist |= BIT(TX_CMD_OFFLD_AMSDU);
 502                 }
 503
 504                 offload_assist = iwl_mvm_tx_csum(mvm, skb, hdr, info,
 505                                                  offload_assist);
 506
 507                 /* padding is inserted later in transport */
 508                 if (ieee80211_hdrlen(hdr->frame_control) % 4 &&
 509                     !(offload_assist & BIT(TX_CMD_OFFLD_AMSDU)))
 510                         offload_assist |= BIT(TX_CMD_OFFLD_PAD);
 511
 512                 if (!info->control.hw_key)
 513                         flags |= IWL_TX_FLAGS_ENCRYPT_DIS;
 514
 515                 /* For data packets rate info comes from the fw */
 516                 if (!(ieee80211_is_data(hdr->frame_control) && sta)) {
 517                         flags |= IWL_TX_FLAGS_CMD_RATE;
 518                         rate_n_flags = iwl_mvm_get_tx_rate(mvm, info, sta);
 519                 }
 520
 521                 if (mvm->trans->cfg->device_family >=
 522                     IWL_DEVICE_FAMILY_22560) {
 523                         struct iwl_tx_cmd_gen3 *cmd = (void *)dev_cmd->payload;
 524
 525                         cmd->offload_assist |= cpu_to_le32(offload_assist);
 526
 527                         /* Total # bytes to be transmitted */
 528                         cmd->len = cpu_to_le16((u16)skb->len);
 529
 530                         /* Copy MAC header from skb into command buffer */
 531                         memcpy(cmd->hdr, hdr, hdrlen);
 532
 533                         cmd->flags = cpu_to_le16(flags);
 534                         cmd->rate_n_flags = cpu_to_le32(rate_n_flags);
 535                 } else {
 536                         struct iwl_tx_cmd_gen2 *cmd = (void *)dev_cmd->payload;
 537
 538                         cmd->offload_assist |= cpu_to_le16(offload_assist);
 539
 540                         /* Total # bytes to be transmitted */
 541                         cmd->len = cpu_to_le16((u16)skb->len);
 542
 543                         /* Copy MAC header from skb into command buffer */
 544                         memcpy(cmd->hdr, hdr, hdrlen);
 545
 546                         cmd->flags = cpu_to_le32(flags);
 547                         cmd->rate_n_flags = cpu_to_le32(rate_n_flags);
 548                 }
 549                 goto out;
 550         }
 551
 552         tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
 553
 554         if (info->control.hw_key)
 555                 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen);
 556
 557         iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id);
 558
 559         iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control);
 560
 561         /* Copy MAC header from skb into command buffer */
 562         memcpy(tx_cmd->hdr, hdr, hdrlen);
 563
 564 out:
 565         return dev_cmd;
 566 }
 567
 568 static void iwl_mvm_skb_prepare_status(struct sk_buff *skb,
 569                                        struct iwl_device_cmd *cmd)
 570 {
 571         struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb);
 572
 573         memset(&skb_info->status, 0, sizeof(skb_info->status));
 574         memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data));
 575
 576         skb_info->driver_data[1] = cmd;
 577 }
 578
 579 static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm,
 580                                       struct ieee80211_tx_info *info, __le16 fc)
 581 {
 582         struct iwl_mvm_vif *mvmvif;
 583
 584         mvmvif = iwl_mvm_vif_from_mac80211(info->control.vif);
 585
 586         switch (info->control.vif->type) {
 587         case NL80211_IFTYPE_AP:
 588         case NL80211_IFTYPE_ADHOC:
 589                 /*
 590                  * Non-bufferable frames use the broadcast station, thus they
 591                  * use the probe queue.
 592                  * Also take care of the case where we send a deauth to a
 593                  * station that we don't have, or similarly an association
 594                  * response (with non-success status) for a station we can't
 595                  * accept.
 596                  * Also, disassociate frames might happen, particular with
 597                  * reason 7 ("Class 3 frame received from nonassociated STA").
 598                  */
 599                 if (ieee80211_is_mgmt(fc) &&
 600                     (!ieee80211_is_bufferable_mmpdu(fc) ||
 601                      ieee80211_is_deauth(fc) || ieee80211_is_disassoc(fc)))
 602                         return mvm->probe_queue;
 603                 if (info->hw_queue == info->control.vif->cab_queue)
 604                         return mvmvif->cab_queue;
 605
 606                 WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC,
 607                           "fc=0x%02x", le16_to_cpu(fc));
 608                 return mvm->probe_queue;
 609         case NL80211_IFTYPE_P2P_DEVICE:
 610                 if (ieee80211_is_mgmt(fc))
 611                         return mvm->p2p_dev_queue;
 612                 if (info->hw_queue == info->control.vif->cab_queue)
 613                         return mvmvif->cab_queue;
 614
 615                 WARN_ON_ONCE(1);
 616                 return mvm->p2p_dev_queue;
 617         default:
 618                 WARN_ONCE(1, "Not a ctrl vif, no available queue\n");
 619                 return -1;
 620         }
 621 }
 622
 623 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb)
 624 {
 625         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 626         struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb);
 627         struct ieee80211_tx_info info;
 628         struct iwl_device_cmd *dev_cmd;
 629         u8 sta_id;
 630         int hdrlen = ieee80211_hdrlen(hdr->frame_control);
 631         int queue;
 632
 633         /* IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets that can be used
 634          * in 2 different types of vifs, P2P & STATION. P2P uses the offchannel
 635          * queue. STATION (HS2.0) uses the auxiliary context of the FW,
 636          * and hence needs to be sent on the aux queue
 637          */
 638         if (skb_info->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
 639             skb_info->control.vif->type == NL80211_IFTYPE_STATION)
 640                 skb_info->hw_queue = mvm->aux_queue;
 641
 642         memcpy(&info, skb->cb, sizeof(info));
 643
 644         if (WARN_ON_ONCE(skb->len > IEEE80211_MAX_DATA_LEN + hdrlen))
 645                 return -1;
 646
 647         if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU))
 648                 return -1;
 649
 650         if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM &&
 651                          (!info.control.vif ||
 652                           info.hw_queue != info.control.vif->cab_queue)))
 653                 return -1;
 654
 655         queue = info.hw_queue;
 656
 657         /*
 658          * If the interface on which the frame is sent is the P2P_DEVICE
 659          * or an AP/GO interface use the broadcast station associated
 660          * with it; otherwise if the interface is a managed interface
 661          * use the AP station associated with it for multicast traffic
 662          * (this is not possible for unicast packets as a TLDS discovery
 663          * response are sent without a station entry); otherwise use the
 664          * AUX station.
 665          */
 666         sta_id = mvm->aux_sta.sta_id;
 667         if (info.control.vif) {
 668                 struct iwl_mvm_vif *mvmvif =
 669                         iwl_mvm_vif_from_mac80211(info.control.vif);
 670
 671                 if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE ||
 672                     info.control.vif->type == NL80211_IFTYPE_AP ||
 673                     info.control.vif->type == NL80211_IFTYPE_ADHOC) {
 674                         if (!ieee80211_is_data(hdr->frame_control))
 675                                 sta_id = mvmvif->bcast_sta.sta_id;
 676                         else
 677                                 sta_id = mvmvif->mcast_sta.sta_id;
 678
 679                         queue = iwl_mvm_get_ctrl_vif_queue(mvm, &info,
 680                                                            hdr->frame_control);
 681                         if (queue < 0)
 682                                 return -1;
 683                 } else if (info.control.vif->type == NL80211_IFTYPE_STATION &&
 684                            is_multicast_ether_addr(hdr->addr1)) {
 685                         u8 ap_sta_id = READ_ONCE(mvmvif->ap_sta_id);
 686
 687                         if (ap_sta_id != IWL_MVM_INVALID_STA)
 688                                 sta_id = ap_sta_id;
 689                 } else if (info.control.vif->type == NL80211_IFTYPE_MONITOR) {
 690                         queue = mvm->snif_queue;
 691                         sta_id = mvm->snif_sta.sta_id;
 692                 }
 693         }
 694
 695         IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue);
 696
 697         dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id);
 698         if (!dev_cmd)
 699                 return -1;
 700
 701         /* From now on, we cannot access info->control */
 702         iwl_mvm_skb_prepare_status(skb, dev_cmd);
 703
 704         if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) {
 705                 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
 706                 return -1;
 707         }
 708
 709         return 0;
 710 }
 711
 712 #ifdef CONFIG_INET
 713
 714 static int
 715 iwl_mvm_tx_tso_segment(struct sk_buff *skb, unsigned int num_subframes,
 716                        netdev_features_t netdev_flags,
 717                        struct sk_buff_head *mpdus_skb)
 718 {
 719         struct sk_buff *tmp, *next;
 720         struct ieee80211_hdr *hdr = (void *)skb->data;
 721         char cb[sizeof(skb->cb)];
 722         u16 i = 0;
 723         unsigned int tcp_payload_len;
 724         unsigned int mss = skb_shinfo(skb)->gso_size;
 725         bool ipv4 = (skb->protocol == htons(ETH_P_IP));
 726         u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0;
 727
 728         skb_shinfo(skb)->gso_size = num_subframes * mss;
 729         memcpy(cb, skb->cb, sizeof(cb));
 730
 731         next = skb_gso_segment(skb, netdev_flags);
 732         skb_shinfo(skb)->gso_size = mss;
 733         if (WARN_ON_ONCE(IS_ERR(next)))
 734                 return -EINVAL;
 735         else if (next)
 736                 consume_skb(skb);
 737
 738         while (next) {
 739                 tmp = next;
 740                 next = tmp->next;
 741
 742                 memcpy(tmp->cb, cb, sizeof(tmp->cb));
 743                 /*
 744                  * Compute the length of all the data added for the A-MSDU.
 745                  * This will be used to compute the length to write in the TX
 746                  * command. We have: SNAP + IP + TCP for n -1 subframes and
 747                  * ETH header for n subframes.
 748                  */
 749                 tcp_payload_len = skb_tail_pointer(tmp) -
 750                         skb_transport_header(tmp) -
 751                         tcp_hdrlen(tmp) + tmp->data_len;
 752
 753                 if (ipv4)
 754                         ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes);
 755
 756                 if (tcp_payload_len > mss) {
 757                         skb_shinfo(tmp)->gso_size = mss;
 758                 } else {
 759                         if (ieee80211_is_data_qos(hdr->frame_control)) {
 760                                 u8 *qc;
 761
 762                                 if (ipv4)
 763                                         ip_send_check(ip_hdr(tmp));
 764
 765                                 qc = ieee80211_get_qos_ctl((void *)tmp->data);
 766                                 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
 767                         }
 768                         skb_shinfo(tmp)->gso_size = 0;
 769                 }
 770
 771                 tmp->prev = NULL;
 772                 tmp->next = NULL;
 773
 774                 __skb_queue_tail(mpdus_skb, tmp);
 775                 i++;
 776         }
 777
 778         return 0;
 779 }
 780
 781 static unsigned int iwl_mvm_max_amsdu_size(struct iwl_mvm *mvm,
 782                                            struct ieee80211_sta *sta,
 783                                            unsigned int tid)
 784 {
 785         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 786         enum nl80211_band band = mvmsta->vif->bss_conf.chandef.chan->band;
 787         u8 ac = tid_to_mac80211_ac[tid];
 788         unsigned int txf;
 789         int lmac = IWL_LMAC_24G_INDEX;
 790
 791         if (iwl_mvm_is_cdb_supported(mvm) &&
 792             band == NL80211_BAND_5GHZ)
 793                 lmac = IWL_LMAC_5G_INDEX;
 794
 795         /* For HE redirect to trigger based fifos */
 796         if (sta->he_cap.has_he && !WARN_ON(!iwl_mvm_has_new_tx_api(mvm)))
 797                 ac += 4;
 798
 799         txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac);
 800
 801         /*
 802          * Don't send an AMSDU that will be longer than the TXF.
 803          * Add a security margin of 256 for the TX command + headers.
 804          * We also want to have the start of the next packet inside the
 805          * fifo to be able to send bursts.
 806          */
 807         return min_t(unsigned int, mvmsta->max_amsdu_len,
 808                      mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256);
 809 }
 810
 811 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
 812                           struct ieee80211_tx_info *info,
 813                           struct ieee80211_sta *sta,
 814                           struct sk_buff_head *mpdus_skb)
 815 {
 816         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 817         struct ieee80211_hdr *hdr = (void *)skb->data;
 818         unsigned int mss = skb_shinfo(skb)->gso_size;
 819         unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len;
 820         u16 snap_ip_tcp, pad;
 821         unsigned int dbg_max_amsdu_len;
 822         netdev_features_t netdev_flags = NETIF_F_CSUM_MASK | NETIF_F_SG;
 823         u8 tid;
 824
 825         snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) +
 826                 tcp_hdrlen(skb);
 827
 828         dbg_max_amsdu_len = READ_ONCE(mvm->max_amsdu_len);
 829
 830         if (!mvmsta->max_amsdu_len ||
 831             !ieee80211_is_data_qos(hdr->frame_control) ||
 832             (!mvmsta->amsdu_enabled && !dbg_max_amsdu_len))
 833                 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
 834
 835         /*
 836          * Do not build AMSDU for IPv6 with extension headers.
 837          * ask stack to segment and checkum the generated MPDUs for us.
 838          */
 839         if (skb->protocol == htons(ETH_P_IPV6) &&
 840             ((struct ipv6hdr *)skb_network_header(skb))->nexthdr !=
 841             IPPROTO_TCP) {
 842                 netdev_flags &= ~NETIF_F_CSUM_MASK;
 843                 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
 844         }
 845
 846         tid = ieee80211_get_tid(hdr);
 847         if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
 848                 return -EINVAL;
 849
 850         /*
 851          * No need to lock amsdu_in_ampdu_allowed since it can't be modified
 852          * during an BA session.
 853          */
 854         if (info->flags & IEEE80211_TX_CTL_AMPDU &&
 855             !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed)
 856                 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
 857
 858         if (iwl_mvm_vif_low_latency(iwl_mvm_vif_from_mac80211(mvmsta->vif)) ||
 859             !(mvmsta->amsdu_enabled & BIT(tid)))
 860                 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
 861
 862         max_amsdu_len = iwl_mvm_max_amsdu_size(mvm, sta, tid);
 863
 864         if (unlikely(dbg_max_amsdu_len))
 865                 max_amsdu_len = min_t(unsigned int, max_amsdu_len,
 866                                       dbg_max_amsdu_len);
 867
 868         /*
 869          * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not
 870          * supported. This is a spec requirement (IEEE 802.11-2015
 871          * section 8.7.3 NOTE 3).
 872          */
 873         if (info->flags & IEEE80211_TX_CTL_AMPDU &&
 874             !sta->vht_cap.vht_supported)
 875                 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095);
 876
 877         /* Sub frame header + SNAP + IP header + TCP header + MSS */
 878         subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss;
 879         pad = (4 - subf_len) & 0x3;
 880
 881         /*
 882          * If we have N subframes in the A-MSDU, then the A-MSDU's size is
 883          * N * subf_len + (N - 1) * pad.
 884          */
 885         num_subframes = (max_amsdu_len + pad) / (subf_len + pad);
 886
 887         if (sta->max_amsdu_subframes &&
 888             num_subframes > sta->max_amsdu_subframes)
 889                 num_subframes = sta->max_amsdu_subframes;
 890
 891         tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
 892                 tcp_hdrlen(skb) + skb->data_len;
 893
 894         /*
 895          * Make sure we have enough TBs for the A-MSDU:
 896          *      2 for each subframe
 897          *      1 more for each fragment
 898          *      1 more for the potential data in the header
 899          */
 900         if ((num_subframes * 2 + skb_shinfo(skb)->nr_frags + 1) >
 901             mvm->trans->max_skb_frags)
 902                 num_subframes = 1;
 903
 904         if (num_subframes > 1)
 905                 *ieee80211_get_qos_ctl(hdr) |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
 906
 907         /* This skb fits in one single A-MSDU */
 908         if (num_subframes * mss >= tcp_payload_len) {
 909                 __skb_queue_tail(mpdus_skb, skb);
 910                 return 0;
 911         }
 912
 913         /*
 914          * Trick the segmentation function to make it
 915          * create SKBs that can fit into one A-MSDU.
 916          */
 917         return iwl_mvm_tx_tso_segment(skb, num_subframes, netdev_flags,
 918                                       mpdus_skb);
 919 }
 920 #else /* CONFIG_INET */
 921 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
 922                           struct ieee80211_tx_info *info,
 923                           struct ieee80211_sta *sta,
 924                           struct sk_buff_head *mpdus_skb)
 925 {
 926         /* Impossible to get TSO with CONFIG_INET */
 927         WARN_ON(1);
 928
 929         return -1;
 930 }
 931 #endif
 932
 933 static void iwl_mvm_tx_add_stream(struct iwl_mvm *mvm,
 934                                   struct iwl_mvm_sta *mvm_sta, u8 tid,
 935                                   struct sk_buff *skb)
 936 {
 937         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 938         u8 mac_queue = info->hw_queue;
 939         struct sk_buff_head *deferred_tx_frames;
 940
 941         lockdep_assert_held(&mvm_sta->lock);
 942
 943         mvm_sta->deferred_traffic_tid_map |= BIT(tid);
 944         set_bit(mvm_sta->sta_id, mvm->sta_deferred_frames);
 945
 946         deferred_tx_frames = &mvm_sta->tid_data[tid].deferred_tx_frames;
 947
 948         skb_queue_tail(deferred_tx_frames, skb);
 949
 950         /*
 951          * The first deferred frame should've stopped the MAC queues, so we
 952          * should never get a second deferred frame for the RA/TID.
 953          * In case of GSO the first packet may have been split, so don't warn.
 954          */
 955         if (skb_queue_len(deferred_tx_frames) == 1) {
 956                 iwl_mvm_stop_mac_queues(mvm, BIT(mac_queue));
 957                 schedule_work(&mvm->add_stream_wk);
 958         }
 959 }
 960
 961 /* Check if there are any timed-out TIDs on a given shared TXQ */
 962 static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id)
 963 {
 964         unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap;
 965         unsigned long now = jiffies;
 966         int tid;
 967
 968         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 969                 return false;
 970
 971         for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) {
 972                 if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] +
 973                                 IWL_MVM_DQA_QUEUE_TIMEOUT, now))
 974                         return true;
 975         }
 976
 977         return false;
 978 }
 979
 980 static void iwl_mvm_tx_airtime(struct iwl_mvm *mvm,
 981                                struct iwl_mvm_sta *mvmsta,
 982                                int airtime)
 983 {
 984         int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
 985         struct iwl_mvm_tcm_mac *mdata = &mvm->tcm.data[mac];
 986
 987         if (mvm->tcm.paused)
 988                 return;
 989
 990         if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD))
 991                 schedule_delayed_work(&mvm->tcm.work, 0);
 992
 993         mdata->tx.airtime += airtime;
 994 }
 995
 996 static void iwl_mvm_tx_pkt_queued(struct iwl_mvm *mvm,
 997                                   struct iwl_mvm_sta *mvmsta, int tid)
 998 {
 999         u32 ac = tid_to_mac80211_ac[tid];
1000         int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
1001         struct iwl_mvm_tcm_mac *mdata = &mvm->tcm.data[mac];
1002
1003         mdata->tx.pkts[ac]++;
1004 }
1005
1006 /*
1007  * Sets the fields in the Tx cmd that are crypto related
1008  */
1009 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb,
1010                            struct ieee80211_tx_info *info,
1011                            struct ieee80211_sta *sta)
1012 {
1013         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1014         struct iwl_mvm_sta *mvmsta;
1015         struct iwl_device_cmd *dev_cmd;
1016         __le16 fc;
1017         u16 seq_number = 0;
1018         u8 tid = IWL_MAX_TID_COUNT;
1019         u16 txq_id = info->hw_queue;
1020         bool is_ampdu = false;
1021         int hdrlen;
1022
1023         mvmsta = iwl_mvm_sta_from_mac80211(sta);
1024         fc = hdr->frame_control;
1025         hdrlen = ieee80211_hdrlen(fc);
1026
1027         if (WARN_ON_ONCE(!mvmsta))
1028                 return -1;
1029
1030         if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA))
1031                 return -1;
1032
1033         dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen,
1034                                         sta, mvmsta->sta_id);
1035         if (!dev_cmd)
1036                 goto drop;
1037
1038         /*
1039          * we handle that entirely ourselves -- for uAPSD the firmware
1040          * will always send a notification, and for PS-Poll responses
1041          * we'll notify mac80211 when getting frame status
1042          */
1043         info->flags &= ~IEEE80211_TX_STATUS_EOSP;
1044
1045         spin_lock(&mvmsta->lock);
1046
1047         /* nullfunc frames should go to the MGMT queue regardless of QOS,
1048          * the condition of !ieee80211_is_qos_nullfunc(fc) keeps the default
1049          * assignment of MGMT TID
1050          */
1051         if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
1052                 tid = ieee80211_get_tid(hdr);
1053                 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
1054                         goto drop_unlock_sta;
1055
1056                 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU;
1057                 if (WARN_ON_ONCE(is_ampdu &&
1058                                  mvmsta->tid_data[tid].state != IWL_AGG_ON))
1059                         goto drop_unlock_sta;
1060
1061                 seq_number = mvmsta->tid_data[tid].seq_number;
1062                 seq_number &= IEEE80211_SCTL_SEQ;
1063
1064                 if (!iwl_mvm_has_new_tx_api(mvm)) {
1065                         struct iwl_tx_cmd *tx_cmd = (void *)dev_cmd->payload;
1066
1067                         hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
1068                         hdr->seq_ctrl |= cpu_to_le16(seq_number);
1069                         /* update the tx_cmd hdr as it was already copied */
1070                         tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl;
1071                 }
1072         }
1073
1074         txq_id = mvmsta->tid_data[tid].txq_id;
1075
1076         WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
1077
1078         /* Check if TXQ needs to be allocated or re-activated */
1079         if (unlikely(txq_id == IWL_MVM_INVALID_QUEUE ||
1080                      !mvmsta->tid_data[tid].is_tid_active)) {
1081                 /* If TXQ needs to be allocated... */
1082                 if (txq_id == IWL_MVM_INVALID_QUEUE) {
1083                         iwl_mvm_tx_add_stream(mvm, mvmsta, tid, skb);
1084
1085                         /*
1086                          * The frame is now deferred, and the worker scheduled
1087                          * will re-allocate it, so we can free it for now.
1088                          */
1089                         iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1090                         spin_unlock(&mvmsta->lock);
1091                         return 0;
1092                 }
1093
1094                 /* queue should always be active in new TX path */
1095                 WARN_ON(iwl_mvm_has_new_tx_api(mvm));
1096
1097                 /* If we are here - TXQ exists and needs to be re-activated */
1098                 spin_lock(&mvm->queue_info_lock);
1099                 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY;
1100                 mvmsta->tid_data[tid].is_tid_active = true;
1101                 spin_unlock(&mvm->queue_info_lock);
1102
1103                 IWL_DEBUG_TX_QUEUES(mvm, "Re-activating queue %d for TX\n",
1104                                     txq_id);
1105         }
1106
1107         if (!iwl_mvm_has_new_tx_api(mvm)) {
1108                 /* Keep track of the time of the last frame for this RA/TID */
1109                 mvm->queue_info[txq_id].last_frame_time[tid] = jiffies;
1110
1111                 /*
1112                  * If we have timed-out TIDs - schedule the worker that will
1113                  * reconfig the queues and update them
1114                  *
1115                  * Note that the mvm->queue_info_lock isn't being taken here in
1116                  * order to not serialize the TX flow. This isn't dangerous
1117                  * because scheduling mvm->add_stream_wk can't ruin the state,
1118                  * and if we DON'T schedule it due to some race condition then
1119                  * next TX we get here we will.
1120                  */
1121                 if (unlikely(mvm->queue_info[txq_id].status ==
1122                              IWL_MVM_QUEUE_SHARED &&
1123                              iwl_mvm_txq_should_update(mvm, txq_id)))
1124                         schedule_work(&mvm->add_stream_wk);
1125         }
1126
1127         IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id,
1128                      tid, txq_id, IEEE80211_SEQ_TO_SN(seq_number));
1129
1130         /* From now on, we cannot access info->control */
1131         iwl_mvm_skb_prepare_status(skb, dev_cmd);
1132
1133         if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id))
1134                 goto drop_unlock_sta;
1135
1136         if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc))
1137                 mvmsta->tid_data[tid].seq_number = seq_number + 0x10;
1138
1139         spin_unlock(&mvmsta->lock);
1140
1141         iwl_mvm_tx_pkt_queued(mvm, mvmsta, tid == IWL_MAX_TID_COUNT ? 0 : tid);
1142
1143         return 0;
1144
1145 drop_unlock_sta:
1146         iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1147         spin_unlock(&mvmsta->lock);
1148 drop:
1149         return -1;
1150 }
1151
1152 int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb,
1153                    struct ieee80211_sta *sta)
1154 {
1155         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1156         struct ieee80211_tx_info info;
1157         struct sk_buff_head mpdus_skbs;
1158         unsigned int payload_len;
1159         int ret;
1160
1161         if (WARN_ON_ONCE(!mvmsta))
1162                 return -1;
1163
1164         if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA))
1165                 return -1;
1166
1167         memcpy(&info, skb->cb, sizeof(info));
1168
1169         if (!skb_is_gso(skb))
1170                 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1171
1172         payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
1173                 tcp_hdrlen(skb) + skb->data_len;
1174
1175         if (payload_len <= skb_shinfo(skb)->gso_size)
1176                 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1177
1178         __skb_queue_head_init(&mpdus_skbs);
1179
1180         ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs);
1181         if (ret)
1182                 return ret;
1183
1184         if (WARN_ON(skb_queue_empty(&mpdus_skbs)))
1185                 return ret;
1186
1187         while (!skb_queue_empty(&mpdus_skbs)) {
1188                 skb = __skb_dequeue(&mpdus_skbs);
1189
1190                 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1191                 if (ret) {
1192                         __skb_queue_purge(&mpdus_skbs);
1193                         return ret;
1194                 }
1195         }
1196
1197         return 0;
1198 }
1199
1200 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm,
1201                                       struct ieee80211_sta *sta, u8 tid)
1202 {
1203         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1204         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1205         struct ieee80211_vif *vif = mvmsta->vif;
1206         u16 normalized_ssn;
1207
1208         lockdep_assert_held(&mvmsta->lock);
1209
1210         if ((tid_data->state == IWL_AGG_ON ||
1211              tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) &&
1212             iwl_mvm_tid_queued(mvm, tid_data) == 0) {
1213                 /*
1214                  * Now that this aggregation or DQA queue is empty tell
1215                  * mac80211 so it knows we no longer have frames buffered for
1216                  * the station on this TID (for the TIM bitmap calculation.)
1217                  */
1218                 ieee80211_sta_set_buffered(sta, tid, false);
1219         }
1220
1221         /*
1222          * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
1223          * to align the wrap around of ssn so we compare relevant values.
1224          */
1225         normalized_ssn = tid_data->ssn;
1226         if (mvm->trans->cfg->gen2)
1227                 normalized_ssn &= 0xff;
1228
1229         if (normalized_ssn != tid_data->next_reclaimed)
1230                 return;
1231
1232         switch (tid_data->state) {
1233         case IWL_EMPTYING_HW_QUEUE_ADDBA:
1234                 IWL_DEBUG_TX_QUEUES(mvm,
1235                                     "Can continue addBA flow ssn = next_recl = %d\n",
1236                                     tid_data->next_reclaimed);
1237                 tid_data->state = IWL_AGG_STARTING;
1238                 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1239                 break;
1240
1241         case IWL_EMPTYING_HW_QUEUE_DELBA:
1242                 IWL_DEBUG_TX_QUEUES(mvm,
1243                                     "Can continue DELBA flow ssn = next_recl = %d\n",
1244                                     tid_data->next_reclaimed);
1245                 tid_data->state = IWL_AGG_OFF;
1246                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1247                 break;
1248
1249         default:
1250                 break;
1251         }
1252 }
1253
1254 #ifdef CONFIG_IWLWIFI_DEBUG
1255 const char *iwl_mvm_get_tx_fail_reason(u32 status)
1256 {
1257 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
1258 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
1259
1260         switch (status & TX_STATUS_MSK) {
1261         case TX_STATUS_SUCCESS:
1262                 return "SUCCESS";
1263         TX_STATUS_POSTPONE(DELAY);
1264         TX_STATUS_POSTPONE(FEW_BYTES);
1265         TX_STATUS_POSTPONE(BT_PRIO);
1266         TX_STATUS_POSTPONE(QUIET_PERIOD);
1267         TX_STATUS_POSTPONE(CALC_TTAK);
1268         TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
1269         TX_STATUS_FAIL(SHORT_LIMIT);
1270         TX_STATUS_FAIL(LONG_LIMIT);
1271         TX_STATUS_FAIL(UNDERRUN);
1272         TX_STATUS_FAIL(DRAIN_FLOW);
1273         TX_STATUS_FAIL(RFKILL_FLUSH);
1274         TX_STATUS_FAIL(LIFE_EXPIRE);
1275         TX_STATUS_FAIL(DEST_PS);
1276         TX_STATUS_FAIL(HOST_ABORTED);
1277         TX_STATUS_FAIL(BT_RETRY);
1278         TX_STATUS_FAIL(STA_INVALID);
1279         TX_STATUS_FAIL(FRAG_DROPPED);
1280         TX_STATUS_FAIL(TID_DISABLE);
1281         TX_STATUS_FAIL(FIFO_FLUSHED);
1282         TX_STATUS_FAIL(SMALL_CF_POLL);
1283         TX_STATUS_FAIL(FW_DROP);
1284         TX_STATUS_FAIL(STA_COLOR_MISMATCH);
1285         }
1286
1287         return "UNKNOWN";
1288
1289 #undef TX_STATUS_FAIL
1290 #undef TX_STATUS_POSTPONE
1291 }
1292 #endif /* CONFIG_IWLWIFI_DEBUG */
1293
1294 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags,
1295                                enum nl80211_band band,
1296                                struct ieee80211_tx_rate *r)
1297 {
1298         if (rate_n_flags & RATE_HT_MCS_GF_MSK)
1299                 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
1300         switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
1301         case RATE_MCS_CHAN_WIDTH_20:
1302                 break;
1303         case RATE_MCS_CHAN_WIDTH_40:
1304                 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
1305                 break;
1306         case RATE_MCS_CHAN_WIDTH_80:
1307                 r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH;
1308                 break;
1309         case RATE_MCS_CHAN_WIDTH_160:
1310                 r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH;
1311                 break;
1312         }
1313         if (rate_n_flags & RATE_MCS_SGI_MSK)
1314                 r->flags |= IEEE80211_TX_RC_SHORT_GI;
1315         if (rate_n_flags & RATE_MCS_HT_MSK) {
1316                 r->flags |= IEEE80211_TX_RC_MCS;
1317                 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
1318         } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
1319                 ieee80211_rate_set_vht(
1320                         r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK,
1321                         ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
1322                                                 RATE_VHT_MCS_NSS_POS) + 1);
1323                 r->flags |= IEEE80211_TX_RC_VHT_MCS;
1324         } else {
1325                 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
1326                                                              band);
1327         }
1328 }
1329
1330 /**
1331  * translate ucode response to mac80211 tx status control values
1332  */
1333 static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags,
1334                                         struct ieee80211_tx_info *info)
1335 {
1336         struct ieee80211_tx_rate *r = &info->status.rates[0];
1337
1338         info->status.antenna =
1339                 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
1340         iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r);
1341 }
1342
1343 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm,
1344                                             u32 status)
1345 {
1346         struct iwl_fw_dbg_trigger_tlv *trig;
1347         struct iwl_fw_dbg_trigger_tx_status *status_trig;
1348         int i;
1349
1350         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TX_STATUS))
1351                 return;
1352
1353         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TX_STATUS);
1354         status_trig = (void *)trig->data;
1355
1356         if (!iwl_fw_dbg_trigger_check_stop(&mvm->fwrt, NULL, trig))
1357                 return;
1358
1359         for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) {
1360                 /* don't collect on status 0 */
1361                 if (!status_trig->statuses[i].status)
1362                         break;
1363
1364                 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK))
1365                         continue;
1366
1367                 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
1368                                         "Tx status %d was received",
1369                                         status & TX_STATUS_MSK);
1370                 break;
1371         }
1372 }
1373
1374 /**
1375  * iwl_mvm_get_scd_ssn - returns the SSN of the SCD
1376  * @tx_resp: the Tx response from the fw (agg or non-agg)
1377  *
1378  * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since
1379  * it can't know that everything will go well until the end of the AMPDU, it
1380  * can't know in advance the number of MPDUs that will be sent in the current
1381  * batch. This is why it writes the agg Tx response while it fetches the MPDUs.
1382  * Hence, it can't know in advance what the SSN of the SCD will be at the end
1383  * of the batch. This is why the SSN of the SCD is written at the end of the
1384  * whole struct at a variable offset. This function knows how to cope with the
1385  * variable offset and returns the SSN of the SCD.
1386  */
1387 static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm,
1388                                       struct iwl_mvm_tx_resp *tx_resp)
1389 {
1390         return le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) +
1391                             tx_resp->frame_count) & 0xfff;
1392 }
1393
1394 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm,
1395                                      struct iwl_rx_packet *pkt)
1396 {
1397         struct ieee80211_sta *sta;
1398         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1399         int txq_id = SEQ_TO_QUEUE(sequence);
1400         /* struct iwl_mvm_tx_resp_v3 is almost the same */
1401         struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1402         int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1403         int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1404         struct agg_tx_status *agg_status =
1405                 iwl_mvm_get_agg_status(mvm, tx_resp);
1406         u32 status = le16_to_cpu(agg_status->status);
1407         u16 ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp);
1408         struct iwl_mvm_sta *mvmsta;
1409         struct sk_buff_head skbs;
1410         u8 skb_freed = 0;
1411         u8 lq_color;
1412         u16 next_reclaimed, seq_ctl;
1413         bool is_ndp = false;
1414
1415         __skb_queue_head_init(&skbs);
1416
1417         if (iwl_mvm_has_new_tx_api(mvm))
1418                 txq_id = le16_to_cpu(tx_resp->tx_queue);
1419
1420         seq_ctl = le16_to_cpu(tx_resp->seq_ctl);
1421
1422         /* we can free until ssn % q.n_bd not inclusive */
1423         iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs);
1424
1425         while (!skb_queue_empty(&skbs)) {
1426                 struct sk_buff *skb = __skb_dequeue(&skbs);
1427                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1428                 struct ieee80211_hdr *hdr = (void *)skb->data;
1429                 bool flushed = false;
1430
1431                 skb_freed++;
1432
1433                 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1434
1435                 memset(&info->status, 0, sizeof(info->status));
1436
1437                 /* inform mac80211 about what happened with the frame */
1438                 switch (status & TX_STATUS_MSK) {
1439                 case TX_STATUS_SUCCESS:
1440                 case TX_STATUS_DIRECT_DONE:
1441                         info->flags |= IEEE80211_TX_STAT_ACK;
1442                         break;
1443                 case TX_STATUS_FAIL_FIFO_FLUSHED:
1444                 case TX_STATUS_FAIL_DRAIN_FLOW:
1445                         flushed = true;
1446                         break;
1447                 case TX_STATUS_FAIL_DEST_PS:
1448                         /* the FW should have stopped the queue and not
1449                          * return this status
1450                          */
1451                         WARN_ON(1);
1452                         info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
1453                         break;
1454                 default:
1455                         break;
1456                 }
1457
1458                 /*
1459                  * If we are freeing multiple frames, mark all the frames
1460                  * but the first one as acked, since they were acknowledged
1461                  * before
1462                  * */
1463                 if (skb_freed > 1)
1464                         info->flags |= IEEE80211_TX_STAT_ACK;
1465
1466                 iwl_mvm_tx_status_check_trigger(mvm, status);
1467
1468                 info->status.rates[0].count = tx_resp->failure_frame + 1;
1469                 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate),
1470                                             info);
1471                 info->status.status_driver_data[1] =
1472                         (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate);
1473
1474                 /* Single frame failure in an AMPDU queue => send BAR */
1475                 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
1476                     !(info->flags & IEEE80211_TX_STAT_ACK) &&
1477                     !(info->flags & IEEE80211_TX_STAT_TX_FILTERED) && !flushed)
1478                         info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1479                 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1480
1481                 /* W/A FW bug: seq_ctl is wrong upon failure / BAR frame */
1482                 if (ieee80211_is_back_req(hdr->frame_control))
1483                         seq_ctl = 0;
1484                 else if (status != TX_STATUS_SUCCESS)
1485                         seq_ctl = le16_to_cpu(hdr->seq_ctrl);
1486
1487                 if (unlikely(!seq_ctl)) {
1488                         struct ieee80211_hdr *hdr = (void *)skb->data;
1489
1490                         /*
1491                          * If it is an NDP, we can't update next_reclaim since
1492                          * its sequence control is 0. Note that for that same
1493                          * reason, NDPs are never sent to A-MPDU'able queues
1494                          * so that we can never have more than one freed frame
1495                          * for a single Tx resonse (see WARN_ON below).
1496                          */
1497                         if (ieee80211_is_qos_nullfunc(hdr->frame_control))
1498                                 is_ndp = true;
1499                 }
1500
1501                 /*
1502                  * TODO: this is not accurate if we are freeing more than one
1503                  * packet.
1504                  */
1505                 info->status.tx_time =
1506                         le16_to_cpu(tx_resp->wireless_media_time);
1507                 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1);
1508                 lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info);
1509                 info->status.status_driver_data[0] =
1510                         RS_DRV_DATA_PACK(lq_color, tx_resp->reduced_tpc);
1511
1512                 ieee80211_tx_status(mvm->hw, skb);
1513         }
1514
1515         /* This is an aggregation queue or might become one, so we use
1516          * the ssn since: ssn = wifi seq_num % 256.
1517          * The seq_ctl is the sequence control of the packet to which
1518          * this Tx response relates. But if there is a hole in the
1519          * bitmap of the BA we received, this Tx response may allow to
1520          * reclaim the hole and all the subsequent packets that were
1521          * already acked. In that case, seq_ctl != ssn, and the next
1522          * packet to be reclaimed will be ssn and not seq_ctl. In that
1523          * case, several packets will be reclaimed even if
1524          * frame_count = 1.
1525          *
1526          * The ssn is the index (% 256) of the latest packet that has
1527          * treated (acked / dropped) + 1.
1528          */
1529         next_reclaimed = ssn;
1530
1531         IWL_DEBUG_TX_REPLY(mvm,
1532                            "TXQ %d status %s (0x%08x)\n",
1533                            txq_id, iwl_mvm_get_tx_fail_reason(status), status);
1534
1535         IWL_DEBUG_TX_REPLY(mvm,
1536                            "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
1537                            le32_to_cpu(tx_resp->initial_rate),
1538                            tx_resp->failure_frame, SEQ_TO_INDEX(sequence),
1539                            ssn, next_reclaimed, seq_ctl);
1540
1541         rcu_read_lock();
1542
1543         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1544         /*
1545          * sta can't be NULL otherwise it'd mean that the sta has been freed in
1546          * the firmware while we still have packets for it in the Tx queues.
1547          */
1548         if (WARN_ON_ONCE(!sta))
1549                 goto out;
1550
1551         if (!IS_ERR(sta)) {
1552                 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1553
1554                 iwl_mvm_tx_airtime(mvm, mvmsta,
1555                                    le16_to_cpu(tx_resp->wireless_media_time));
1556
1557                 if (tid != IWL_TID_NON_QOS && tid != IWL_MGMT_TID) {
1558                         struct iwl_mvm_tid_data *tid_data =
1559                                 &mvmsta->tid_data[tid];
1560                         bool send_eosp_ndp = false;
1561
1562                         spin_lock_bh(&mvmsta->lock);
1563
1564                         if (!is_ndp) {
1565                                 tid_data->next_reclaimed = next_reclaimed;
1566                                 IWL_DEBUG_TX_REPLY(mvm,
1567                                                    "Next reclaimed packet:%d\n",
1568                                                    next_reclaimed);
1569                         } else {
1570                                 IWL_DEBUG_TX_REPLY(mvm,
1571                                                    "NDP - don't update next_reclaimed\n");
1572                         }
1573
1574                         iwl_mvm_check_ratid_empty(mvm, sta, tid);
1575
1576                         if (mvmsta->sleep_tx_count) {
1577                                 mvmsta->sleep_tx_count--;
1578                                 if (mvmsta->sleep_tx_count &&
1579                                     !iwl_mvm_tid_queued(mvm, tid_data)) {
1580                                         /*
1581                                          * The number of frames in the queue
1582                                          * dropped to 0 even if we sent less
1583                                          * frames than we thought we had on the
1584                                          * Tx queue.
1585                                          * This means we had holes in the BA
1586                                          * window that we just filled, ask
1587                                          * mac80211 to send EOSP since the
1588                                          * firmware won't know how to do that.
1589                                          * Send NDP and the firmware will send
1590                                          * EOSP notification that will trigger
1591                                          * a call to ieee80211_sta_eosp().
1592                                          */
1593                                         send_eosp_ndp = true;
1594                                 }
1595                         }
1596
1597                         spin_unlock_bh(&mvmsta->lock);
1598                         if (send_eosp_ndp) {
1599                                 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta,
1600                                         IEEE80211_FRAME_RELEASE_UAPSD,
1601                                         1, tid, false, false);
1602                                 mvmsta->sleep_tx_count = 0;
1603                                 ieee80211_send_eosp_nullfunc(sta, tid);
1604                         }
1605                 }
1606
1607                 if (mvmsta->next_status_eosp) {
1608                         mvmsta->next_status_eosp = false;
1609                         ieee80211_sta_eosp(sta);
1610                 }
1611         } else {
1612                 mvmsta = NULL;
1613         }
1614
1615 out:
1616         rcu_read_unlock();
1617 }
1618
1619 #ifdef CONFIG_IWLWIFI_DEBUG
1620 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
1621 static const char *iwl_get_agg_tx_status(u16 status)
1622 {
1623         switch (status & AGG_TX_STATE_STATUS_MSK) {
1624         AGG_TX_STATE_(TRANSMITTED);
1625         AGG_TX_STATE_(UNDERRUN);
1626         AGG_TX_STATE_(BT_PRIO);
1627         AGG_TX_STATE_(FEW_BYTES);
1628         AGG_TX_STATE_(ABORT);
1629         AGG_TX_STATE_(TX_ON_AIR_DROP);
1630         AGG_TX_STATE_(LAST_SENT_TRY_CNT);
1631         AGG_TX_STATE_(LAST_SENT_BT_KILL);
1632         AGG_TX_STATE_(SCD_QUERY);
1633         AGG_TX_STATE_(TEST_BAD_CRC32);
1634         AGG_TX_STATE_(RESPONSE);
1635         AGG_TX_STATE_(DUMP_TX);
1636         AGG_TX_STATE_(DELAY_TX);
1637         }
1638
1639         return "UNKNOWN";
1640 }
1641
1642 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1643                                       struct iwl_rx_packet *pkt)
1644 {
1645         struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1646         struct agg_tx_status *frame_status =
1647                 iwl_mvm_get_agg_status(mvm, tx_resp);
1648         int i;
1649
1650         for (i = 0; i < tx_resp->frame_count; i++) {
1651                 u16 fstatus = le16_to_cpu(frame_status[i].status);
1652
1653                 IWL_DEBUG_TX_REPLY(mvm,
1654                                    "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
1655                                    iwl_get_agg_tx_status(fstatus),
1656                                    fstatus & AGG_TX_STATE_STATUS_MSK,
1657                                    (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >>
1658                                         AGG_TX_STATE_TRY_CNT_POS,
1659                                    le16_to_cpu(frame_status[i].sequence));
1660         }
1661 }
1662 #else
1663 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1664                                       struct iwl_rx_packet *pkt)
1665 {}
1666 #endif /* CONFIG_IWLWIFI_DEBUG */
1667
1668 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm,
1669                                   struct iwl_rx_packet *pkt)
1670 {
1671         struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1672         int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1673         int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1674         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1675         struct iwl_mvm_sta *mvmsta;
1676         int queue = SEQ_TO_QUEUE(sequence);
1677
1678         if (WARN_ON_ONCE(queue < IWL_MVM_DQA_MIN_DATA_QUEUE &&
1679                          (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)))
1680                 return;
1681
1682         if (WARN_ON_ONCE(tid == IWL_TID_NON_QOS))
1683                 return;
1684
1685         iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt);
1686
1687         rcu_read_lock();
1688
1689         mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1690
1691         if (!WARN_ON_ONCE(!mvmsta)) {
1692                 mvmsta->tid_data[tid].rate_n_flags =
1693                         le32_to_cpu(tx_resp->initial_rate);
1694                 mvmsta->tid_data[tid].tx_time =
1695                         le16_to_cpu(tx_resp->wireless_media_time);
1696                 mvmsta->tid_data[tid].lq_color =
1697                         TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info);
1698                 iwl_mvm_tx_airtime(mvm, mvmsta,
1699                                    le16_to_cpu(tx_resp->wireless_media_time));
1700         }
1701
1702         rcu_read_unlock();
1703 }
1704
1705 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1706 {
1707         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1708         struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1709
1710         if (tx_resp->frame_count == 1)
1711                 iwl_mvm_rx_tx_cmd_single(mvm, pkt);
1712         else
1713                 iwl_mvm_rx_tx_cmd_agg(mvm, pkt);
1714 }
1715
1716 static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid,
1717                                int txq, int index,
1718                                struct ieee80211_tx_info *ba_info, u32 rate)
1719 {
1720         struct sk_buff_head reclaimed_skbs;
1721         struct iwl_mvm_tid_data *tid_data;
1722         struct ieee80211_sta *sta;
1723         struct iwl_mvm_sta *mvmsta;
1724         struct sk_buff *skb;
1725         int freed;
1726
1727         if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT ||
1728                       tid > IWL_MAX_TID_COUNT,
1729                       "sta_id %d tid %d", sta_id, tid))
1730                 return;
1731
1732         rcu_read_lock();
1733
1734         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1735
1736         /* Reclaiming frames for a station that has been deleted ? */
1737         if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
1738                 rcu_read_unlock();
1739                 return;
1740         }
1741
1742         mvmsta = iwl_mvm_sta_from_mac80211(sta);
1743         tid_data = &mvmsta->tid_data[tid];
1744
1745         if (tid_data->txq_id != txq) {
1746                 IWL_ERR(mvm,
1747                         "invalid BA notification: Q %d, tid %d\n",
1748                         tid_data->txq_id, tid);
1749                 rcu_read_unlock();
1750                 return;
1751         }
1752
1753         spin_lock_bh(&mvmsta->lock);
1754
1755         __skb_queue_head_init(&reclaimed_skbs);
1756
1757         /*
1758          * Release all TFDs before the SSN, i.e. all TFDs in front of
1759          * block-ack window (we assume that they've been successfully
1760          * transmitted ... if not, it's too late anyway).
1761          */
1762         iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs);
1763
1764         tid_data->next_reclaimed = index;
1765
1766         iwl_mvm_check_ratid_empty(mvm, sta, tid);
1767
1768         freed = 0;
1769
1770         /* pack lq color from tid_data along the reduced txp */
1771         ba_info->status.status_driver_data[0] =
1772                 RS_DRV_DATA_PACK(tid_data->lq_color,
1773                                  ba_info->status.status_driver_data[0]);
1774         ba_info->status.status_driver_data[1] = (void *)(uintptr_t)rate;
1775
1776         skb_queue_walk(&reclaimed_skbs, skb) {
1777                 struct ieee80211_hdr *hdr = (void *)skb->data;
1778                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1779
1780                 if (ieee80211_is_data_qos(hdr->frame_control))
1781                         freed++;
1782                 else
1783                         WARN_ON_ONCE(tid != IWL_MAX_TID_COUNT);
1784
1785                 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1786
1787                 memset(&info->status, 0, sizeof(info->status));
1788                 /* Packet was transmitted successfully, failures come as single
1789                  * frames because before failing a frame the firmware transmits
1790                  * it without aggregation at least once.
1791                  */
1792                 info->flags |= IEEE80211_TX_STAT_ACK;
1793
1794                 /* this is the first skb we deliver in this batch */
1795                 /* put the rate scaling data there */
1796                 if (freed == 1) {
1797                         info->flags |= IEEE80211_TX_STAT_AMPDU;
1798                         memcpy(&info->status, &ba_info->status,
1799                                sizeof(ba_info->status));
1800                         iwl_mvm_hwrate_to_tx_status(rate, info);
1801                 }
1802         }
1803
1804         spin_unlock_bh(&mvmsta->lock);
1805
1806         /* We got a BA notif with 0 acked or scd_ssn didn't progress which is
1807          * possible (i.e. first MPDU in the aggregation wasn't acked)
1808          * Still it's important to update RS about sent vs. acked.
1809          */
1810         if (skb_queue_empty(&reclaimed_skbs)) {
1811                 struct ieee80211_chanctx_conf *chanctx_conf = NULL;
1812
1813                 if (mvmsta->vif)
1814                         chanctx_conf =
1815                                 rcu_dereference(mvmsta->vif->chanctx_conf);
1816
1817                 if (WARN_ON_ONCE(!chanctx_conf))
1818                         goto out;
1819
1820                 ba_info->band = chanctx_conf->def.chan->band;
1821                 iwl_mvm_hwrate_to_tx_status(rate, ba_info);
1822
1823                 if (!iwl_mvm_has_tlc_offload(mvm)) {
1824                         IWL_DEBUG_TX_REPLY(mvm,
1825                                            "No reclaim. Update rs directly\n");
1826                         iwl_mvm_rs_tx_status(mvm, sta, tid, ba_info, false);
1827                 }
1828         }
1829
1830 out:
1831         rcu_read_unlock();
1832
1833         while (!skb_queue_empty(&reclaimed_skbs)) {
1834                 skb = __skb_dequeue(&reclaimed_skbs);
1835                 ieee80211_tx_status(mvm->hw, skb);
1836         }
1837 }
1838
1839 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1840 {
1841         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1842         int sta_id, tid, txq, index;
1843         struct ieee80211_tx_info ba_info = {};
1844         struct iwl_mvm_ba_notif *ba_notif;
1845         struct iwl_mvm_tid_data *tid_data;
1846         struct iwl_mvm_sta *mvmsta;
1847
1848         ba_info.flags = IEEE80211_TX_STAT_AMPDU;
1849
1850         if (iwl_mvm_has_new_tx_api(mvm)) {
1851                 struct iwl_mvm_compressed_ba_notif *ba_res =
1852                         (void *)pkt->data;
1853                 u8 lq_color = TX_RES_RATE_TABLE_COL_GET(ba_res->tlc_rate_info);
1854                 int i;
1855
1856                 sta_id = ba_res->sta_id;
1857                 ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done);
1858                 ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed);
1859                 ba_info.status.tx_time =
1860                         (u16)le32_to_cpu(ba_res->wireless_time);
1861                 ba_info.status.status_driver_data[0] =
1862                         (void *)(uintptr_t)ba_res->reduced_txp;
1863
1864                 if (!le16_to_cpu(ba_res->tfd_cnt))
1865                         goto out;
1866
1867                 rcu_read_lock();
1868
1869                 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1870                 if (!mvmsta)
1871                         goto out_unlock;
1872
1873                 /* Free per TID */
1874                 for (i = 0; i < le16_to_cpu(ba_res->tfd_cnt); i++) {
1875                         struct iwl_mvm_compressed_ba_tfd *ba_tfd =
1876                                 &ba_res->tfd[i];
1877
1878                         tid = ba_tfd->tid;
1879                         if (tid == IWL_MGMT_TID)
1880                                 tid = IWL_MAX_TID_COUNT;
1881
1882                         mvmsta->tid_data[i].lq_color = lq_color;
1883                         iwl_mvm_tx_reclaim(mvm, sta_id, tid,
1884                                            (int)(le16_to_cpu(ba_tfd->q_num)),
1885                                            le16_to_cpu(ba_tfd->tfd_index),
1886                                            &ba_info,
1887                                            le32_to_cpu(ba_res->tx_rate));
1888                 }
1889
1890                 iwl_mvm_tx_airtime(mvm, mvmsta,
1891                                    le32_to_cpu(ba_res->wireless_time));
1892 out_unlock:
1893                 rcu_read_unlock();
1894 out:
1895                 IWL_DEBUG_TX_REPLY(mvm,
1896                                    "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n",
1897                                    sta_id, le32_to_cpu(ba_res->flags),
1898                                    le16_to_cpu(ba_res->txed),
1899                                    le16_to_cpu(ba_res->done));
1900                 return;
1901         }
1902
1903         ba_notif = (void *)pkt->data;
1904         sta_id = ba_notif->sta_id;
1905         tid = ba_notif->tid;
1906         /* "flow" corresponds to Tx queue */
1907         txq = le16_to_cpu(ba_notif->scd_flow);
1908         /* "ssn" is start of block-ack Tx window, corresponds to index
1909          * (in Tx queue's circular buffer) of first TFD/frame in window */
1910         index = le16_to_cpu(ba_notif->scd_ssn);
1911
1912         rcu_read_lock();
1913         mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1914         if (WARN_ON_ONCE(!mvmsta)) {
1915                 rcu_read_unlock();
1916                 return;
1917         }
1918
1919         tid_data = &mvmsta->tid_data[tid];
1920
1921         ba_info.status.ampdu_ack_len = ba_notif->txed_2_done;
1922         ba_info.status.ampdu_len = ba_notif->txed;
1923         ba_info.status.tx_time = tid_data->tx_time;
1924         ba_info.status.status_driver_data[0] =
1925                 (void *)(uintptr_t)ba_notif->reduced_txp;
1926
1927         rcu_read_unlock();
1928
1929         iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info,
1930                            tid_data->rate_n_flags);
1931
1932         IWL_DEBUG_TX_REPLY(mvm,
1933                            "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
1934                            ba_notif->sta_addr, ba_notif->sta_id);
1935
1936         IWL_DEBUG_TX_REPLY(mvm,
1937                            "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
1938                            ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl),
1939                            le64_to_cpu(ba_notif->bitmap), txq, index,
1940                            ba_notif->txed, ba_notif->txed_2_done);
1941
1942         IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n",
1943                            ba_notif->reduced_txp);
1944 }
1945
1946 /*
1947  * Note that there are transports that buffer frames before they reach
1948  * the firmware. This means that after flush_tx_path is called, the
1949  * queue might not be empty. The race-free way to handle this is to:
1950  * 1) set the station as draining
1951  * 2) flush the Tx path
1952  * 3) wait for the transport queues to be empty
1953  */
1954 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, u32 flags)
1955 {
1956         int ret;
1957         struct iwl_tx_path_flush_cmd_v1 flush_cmd = {
1958                 .queues_ctl = cpu_to_le32(tfd_msk),
1959                 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH),
1960         };
1961
1962         WARN_ON(iwl_mvm_has_new_tx_api(mvm));
1963
1964         ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags,
1965                                    sizeof(flush_cmd), &flush_cmd);
1966         if (ret)
1967                 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
1968         return ret;
1969 }
1970
1971 int iwl_mvm_flush_sta_tids(struct iwl_mvm *mvm, u32 sta_id,
1972                            u16 tids, u32 flags)
1973 {
1974         int ret;
1975         struct iwl_tx_path_flush_cmd flush_cmd = {
1976                 .sta_id = cpu_to_le32(sta_id),
1977                 .tid_mask = cpu_to_le16(tids),
1978         };
1979
1980         WARN_ON(!iwl_mvm_has_new_tx_api(mvm));
1981
1982         ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags,
1983                                    sizeof(flush_cmd), &flush_cmd);
1984         if (ret)
1985                 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
1986         return ret;
1987 }
1988
1989 int iwl_mvm_flush_sta(struct iwl_mvm *mvm, void *sta, bool internal, u32 flags)
1990 {
1991         struct iwl_mvm_int_sta *int_sta = sta;
1992         struct iwl_mvm_sta *mvm_sta = sta;
1993
1994         BUILD_BUG_ON(offsetof(struct iwl_mvm_int_sta, sta_id) !=
1995                      offsetof(struct iwl_mvm_sta, sta_id));
1996
1997         if (iwl_mvm_has_new_tx_api(mvm))
1998                 return iwl_mvm_flush_sta_tids(mvm, mvm_sta->sta_id,
1999                                               0xff | BIT(IWL_MGMT_TID), flags);
2000
2001         if (internal)
2002                 return iwl_mvm_flush_tx_path(mvm, int_sta->tfd_queue_msk,
2003                                              flags);
2004
2005         return iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, flags);
2006 }