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(info.flags & IEEE80211_TX_CTL_AMPDU))
 645                 return -1;
 646
 647         if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM &&
 648                          (!info.control.vif ||
 649                           info.hw_queue != info.control.vif->cab_queue)))
 650                 return -1;
 651
 652         queue = info.hw_queue;
 653
 654         /*
 655          * If the interface on which the frame is sent is the P2P_DEVICE
 656          * or an AP/GO interface use the broadcast station associated
 657          * with it; otherwise if the interface is a managed interface
 658          * use the AP station associated with it for multicast traffic
 659          * (this is not possible for unicast packets as a TLDS discovery
 660          * response are sent without a station entry); otherwise use the
 661          * AUX station.
 662          */
 663         sta_id = mvm->aux_sta.sta_id;
 664         if (info.control.vif) {
 665                 struct iwl_mvm_vif *mvmvif =
 666                         iwl_mvm_vif_from_mac80211(info.control.vif);
 667
 668                 if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE ||
 669                     info.control.vif->type == NL80211_IFTYPE_AP ||
 670                     info.control.vif->type == NL80211_IFTYPE_ADHOC) {
 671                         if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE)
 672                                 sta_id = mvmvif->bcast_sta.sta_id;
 673                         else
 674                                 sta_id = mvmvif->mcast_sta.sta_id;
 675
 676                         queue = iwl_mvm_get_ctrl_vif_queue(mvm, &info,
 677                                                            hdr->frame_control);
 678                         if (queue < 0)
 679                                 return -1;
 680                 } else if (info.control.vif->type == NL80211_IFTYPE_STATION &&
 681                            is_multicast_ether_addr(hdr->addr1)) {
 682                         u8 ap_sta_id = READ_ONCE(mvmvif->ap_sta_id);
 683
 684                         if (ap_sta_id != IWL_MVM_INVALID_STA)
 685                                 sta_id = ap_sta_id;
 686                 } else if (info.control.vif->type == NL80211_IFTYPE_MONITOR) {
 687                         queue = mvm->snif_queue;
 688                         sta_id = mvm->snif_sta.sta_id;
 689                 }
 690         }
 691
 692         IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue);
 693
 694         dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id);
 695         if (!dev_cmd)
 696                 return -1;
 697
 698         /* From now on, we cannot access info->control */
 699         iwl_mvm_skb_prepare_status(skb, dev_cmd);
 700
 701         if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) {
 702                 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
 703                 return -1;
 704         }
 705
 706         return 0;
 707 }
 708
 709 #ifdef CONFIG_INET
 710
 711 static int
 712 iwl_mvm_tx_tso_segment(struct sk_buff *skb, unsigned int num_subframes,
 713                        netdev_features_t netdev_flags,
 714                        struct sk_buff_head *mpdus_skb)
 715 {
 716         struct sk_buff *tmp, *next;
 717         struct ieee80211_hdr *hdr = (void *)skb->data;
 718         char cb[sizeof(skb->cb)];
 719         u16 i = 0;
 720         unsigned int tcp_payload_len;
 721         unsigned int mss = skb_shinfo(skb)->gso_size;
 722         bool ipv4 = (skb->protocol == htons(ETH_P_IP));
 723         u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0;
 724
 725         skb_shinfo(skb)->gso_size = num_subframes * mss;
 726         memcpy(cb, skb->cb, sizeof(cb));
 727
 728         next = skb_gso_segment(skb, netdev_flags);
 729         skb_shinfo(skb)->gso_size = mss;
 730         if (WARN_ON_ONCE(IS_ERR(next)))
 731                 return -EINVAL;
 732         else if (next)
 733                 consume_skb(skb);
 734
 735         while (next) {
 736                 tmp = next;
 737                 next = tmp->next;
 738
 739                 memcpy(tmp->cb, cb, sizeof(tmp->cb));
 740                 /*
 741                  * Compute the length of all the data added for the A-MSDU.
 742                  * This will be used to compute the length to write in the TX
 743                  * command. We have: SNAP + IP + TCP for n -1 subframes and
 744                  * ETH header for n subframes.
 745                  */
 746                 tcp_payload_len = skb_tail_pointer(tmp) -
 747                         skb_transport_header(tmp) -
 748                         tcp_hdrlen(tmp) + tmp->data_len;
 749
 750                 if (ipv4)
 751                         ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes);
 752
 753                 if (tcp_payload_len > mss) {
 754                         skb_shinfo(tmp)->gso_size = mss;
 755                 } else {
 756                         if (ieee80211_is_data_qos(hdr->frame_control)) {
 757                                 u8 *qc;
 758
 759                                 if (ipv4)
 760                                         ip_send_check(ip_hdr(tmp));
 761
 762                                 qc = ieee80211_get_qos_ctl((void *)tmp->data);
 763                                 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
 764                         }
 765                         skb_shinfo(tmp)->gso_size = 0;
 766                 }
 767
 768                 tmp->prev = NULL;
 769                 tmp->next = NULL;
 770
 771                 __skb_queue_tail(mpdus_skb, tmp);
 772                 i++;
 773         }
 774
 775         return 0;
 776 }
 777
 778 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
 779                           struct ieee80211_tx_info *info,
 780                           struct ieee80211_sta *sta,
 781                           struct sk_buff_head *mpdus_skb)
 782 {
 783         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 784         struct ieee80211_hdr *hdr = (void *)skb->data;
 785         unsigned int mss = skb_shinfo(skb)->gso_size;
 786         unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len;
 787         u16 snap_ip_tcp, pad;
 788         unsigned int dbg_max_amsdu_len;
 789         netdev_features_t netdev_flags = NETIF_F_CSUM_MASK | NETIF_F_SG;
 790         u8 tid, txf;
 791
 792         snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) +
 793                 tcp_hdrlen(skb);
 794
 795         dbg_max_amsdu_len = READ_ONCE(mvm->max_amsdu_len);
 796
 797         if (!mvmsta->max_amsdu_len ||
 798             !ieee80211_is_data_qos(hdr->frame_control) ||
 799             (!mvmsta->amsdu_enabled && !dbg_max_amsdu_len))
 800                 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
 801
 802         /*
 803          * Do not build AMSDU for IPv6 with extension headers.
 804          * ask stack to segment and checkum the generated MPDUs for us.
 805          */
 806         if (skb->protocol == htons(ETH_P_IPV6) &&
 807             ((struct ipv6hdr *)skb_network_header(skb))->nexthdr !=
 808             IPPROTO_TCP) {
 809                 netdev_flags &= ~NETIF_F_CSUM_MASK;
 810                 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
 811         }
 812
 813         tid = ieee80211_get_tid(hdr);
 814         if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
 815                 return -EINVAL;
 816
 817         /*
 818          * No need to lock amsdu_in_ampdu_allowed since it can't be modified
 819          * during an BA session.
 820          */
 821         if (info->flags & IEEE80211_TX_CTL_AMPDU &&
 822             !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed)
 823                 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
 824
 825         if (iwl_mvm_vif_low_latency(iwl_mvm_vif_from_mac80211(mvmsta->vif)) ||
 826             !(mvmsta->amsdu_enabled & BIT(tid)))
 827                 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
 828
 829         max_amsdu_len = mvmsta->max_amsdu_len;
 830
 831         /* the Tx FIFO to which this A-MSDU will be routed */
 832         txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, tid_to_mac80211_ac[tid]);
 833
 834         /*
 835          * Don't send an AMSDU that will be longer than the TXF.
 836          * Add a security margin of 256 for the TX command + headers.
 837          * We also want to have the start of the next packet inside the
 838          * fifo to be able to send bursts.
 839          */
 840         max_amsdu_len = min_t(unsigned int, max_amsdu_len,
 841                               mvm->fwrt.smem_cfg.lmac[0].txfifo_size[txf] -
 842                               256);
 843
 844         if (unlikely(dbg_max_amsdu_len))
 845                 max_amsdu_len = min_t(unsigned int, max_amsdu_len,
 846                                       dbg_max_amsdu_len);
 847
 848         /*
 849          * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not
 850          * supported. This is a spec requirement (IEEE 802.11-2015
 851          * section 8.7.3 NOTE 3).
 852          */
 853         if (info->flags & IEEE80211_TX_CTL_AMPDU &&
 854             !sta->vht_cap.vht_supported)
 855                 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095);
 856
 857         /* Sub frame header + SNAP + IP header + TCP header + MSS */
 858         subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss;
 859         pad = (4 - subf_len) & 0x3;
 860
 861         /*
 862          * If we have N subframes in the A-MSDU, then the A-MSDU's size is
 863          * N * subf_len + (N - 1) * pad.
 864          */
 865         num_subframes = (max_amsdu_len + pad) / (subf_len + pad);
 866
 867         if (sta->max_amsdu_subframes &&
 868             num_subframes > sta->max_amsdu_subframes)
 869                 num_subframes = sta->max_amsdu_subframes;
 870
 871         tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
 872                 tcp_hdrlen(skb) + skb->data_len;
 873
 874         /*
 875          * Make sure we have enough TBs for the A-MSDU:
 876          *      2 for each subframe
 877          *      1 more for each fragment
 878          *      1 more for the potential data in the header
 879          */
 880         if ((num_subframes * 2 + skb_shinfo(skb)->nr_frags + 1) >
 881             mvm->trans->max_skb_frags)
 882                 num_subframes = 1;
 883
 884         if (num_subframes > 1)
 885                 *ieee80211_get_qos_ctl(hdr) |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
 886
 887         /* This skb fits in one single A-MSDU */
 888         if (num_subframes * mss >= tcp_payload_len) {
 889                 __skb_queue_tail(mpdus_skb, skb);
 890                 return 0;
 891         }
 892
 893         /*
 894          * Trick the segmentation function to make it
 895          * create SKBs that can fit into one A-MSDU.
 896          */
 897         return iwl_mvm_tx_tso_segment(skb, num_subframes, netdev_flags,
 898                                       mpdus_skb);
 899 }
 900 #else /* CONFIG_INET */
 901 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
 902                           struct ieee80211_tx_info *info,
 903                           struct ieee80211_sta *sta,
 904                           struct sk_buff_head *mpdus_skb)
 905 {
 906         /* Impossible to get TSO with CONFIG_INET */
 907         WARN_ON(1);
 908
 909         return -1;
 910 }
 911 #endif
 912
 913 static void iwl_mvm_tx_add_stream(struct iwl_mvm *mvm,
 914                                   struct iwl_mvm_sta *mvm_sta, u8 tid,
 915                                   struct sk_buff *skb)
 916 {
 917         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 918         u8 mac_queue = info->hw_queue;
 919         struct sk_buff_head *deferred_tx_frames;
 920
 921         lockdep_assert_held(&mvm_sta->lock);
 922
 923         mvm_sta->deferred_traffic_tid_map |= BIT(tid);
 924         set_bit(mvm_sta->sta_id, mvm->sta_deferred_frames);
 925
 926         deferred_tx_frames = &mvm_sta->tid_data[tid].deferred_tx_frames;
 927
 928         skb_queue_tail(deferred_tx_frames, skb);
 929
 930         /*
 931          * The first deferred frame should've stopped the MAC queues, so we
 932          * should never get a second deferred frame for the RA/TID.
 933          * In case of GSO the first packet may have been split, so don't warn.
 934          */
 935         if (skb_queue_len(deferred_tx_frames) == 1) {
 936                 iwl_mvm_stop_mac_queues(mvm, BIT(mac_queue));
 937                 schedule_work(&mvm->add_stream_wk);
 938         }
 939 }
 940
 941 /* Check if there are any timed-out TIDs on a given shared TXQ */
 942 static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id)
 943 {
 944         unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap;
 945         unsigned long now = jiffies;
 946         int tid;
 947
 948         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 949                 return false;
 950
 951         for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) {
 952                 if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] +
 953                                 IWL_MVM_DQA_QUEUE_TIMEOUT, now))
 954                         return true;
 955         }
 956
 957         return false;
 958 }
 959
 960 static void iwl_mvm_tx_airtime(struct iwl_mvm *mvm,
 961                                struct iwl_mvm_sta *mvmsta,
 962                                int airtime)
 963 {
 964         int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
 965         struct iwl_mvm_tcm_mac *mdata = &mvm->tcm.data[mac];
 966
 967         if (mvm->tcm.paused)
 968                 return;
 969
 970         if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD))
 971                 schedule_delayed_work(&mvm->tcm.work, 0);
 972
 973         mdata->tx.airtime += airtime;
 974 }
 975
 976 static void iwl_mvm_tx_pkt_queued(struct iwl_mvm *mvm,
 977                                   struct iwl_mvm_sta *mvmsta, int tid)
 978 {
 979         u32 ac = tid_to_mac80211_ac[tid];
 980         int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
 981         struct iwl_mvm_tcm_mac *mdata = &mvm->tcm.data[mac];
 982
 983         mdata->tx.pkts[ac]++;
 984 }
 985
 986 /*
 987  * Sets the fields in the Tx cmd that are crypto related
 988  */
 989 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb,
 990                            struct ieee80211_tx_info *info,
 991                            struct ieee80211_sta *sta)
 992 {
 993         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 994         struct iwl_mvm_sta *mvmsta;
 995         struct iwl_device_cmd *dev_cmd;
 996         __le16 fc;
 997         u16 seq_number = 0;
 998         u8 tid = IWL_MAX_TID_COUNT;
 999         u16 txq_id = info->hw_queue;
1000         bool is_ampdu = false;
1001         int hdrlen;
1002
1003         mvmsta = iwl_mvm_sta_from_mac80211(sta);
1004         fc = hdr->frame_control;
1005         hdrlen = ieee80211_hdrlen(fc);
1006
1007         if (WARN_ON_ONCE(!mvmsta))
1008                 return -1;
1009
1010         if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA))
1011                 return -1;
1012
1013         dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen,
1014                                         sta, mvmsta->sta_id);
1015         if (!dev_cmd)
1016                 goto drop;
1017
1018         /*
1019          * we handle that entirely ourselves -- for uAPSD the firmware
1020          * will always send a notification, and for PS-Poll responses
1021          * we'll notify mac80211 when getting frame status
1022          */
1023         info->flags &= ~IEEE80211_TX_STATUS_EOSP;
1024
1025         spin_lock(&mvmsta->lock);
1026
1027         /* nullfunc frames should go to the MGMT queue regardless of QOS,
1028          * the condition of !ieee80211_is_qos_nullfunc(fc) keeps the default
1029          * assignment of MGMT TID
1030          */
1031         if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
1032                 tid = ieee80211_get_tid(hdr);
1033                 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
1034                         goto drop_unlock_sta;
1035
1036                 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU;
1037                 if (WARN_ON_ONCE(is_ampdu &&
1038                                  mvmsta->tid_data[tid].state != IWL_AGG_ON))
1039                         goto drop_unlock_sta;
1040
1041                 seq_number = mvmsta->tid_data[tid].seq_number;
1042                 seq_number &= IEEE80211_SCTL_SEQ;
1043
1044                 if (!iwl_mvm_has_new_tx_api(mvm)) {
1045                         struct iwl_tx_cmd *tx_cmd = (void *)dev_cmd->payload;
1046
1047                         hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
1048                         hdr->seq_ctrl |= cpu_to_le16(seq_number);
1049                         /* update the tx_cmd hdr as it was already copied */
1050                         tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl;
1051                 }
1052         }
1053
1054         txq_id = mvmsta->tid_data[tid].txq_id;
1055
1056         WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
1057
1058         /* Check if TXQ needs to be allocated or re-activated */
1059         if (unlikely(txq_id == IWL_MVM_INVALID_QUEUE ||
1060                      !mvmsta->tid_data[tid].is_tid_active)) {
1061                 /* If TXQ needs to be allocated... */
1062                 if (txq_id == IWL_MVM_INVALID_QUEUE) {
1063                         iwl_mvm_tx_add_stream(mvm, mvmsta, tid, skb);
1064
1065                         /*
1066                          * The frame is now deferred, and the worker scheduled
1067                          * will re-allocate it, so we can free it for now.
1068                          */
1069                         iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1070                         spin_unlock(&mvmsta->lock);
1071                         return 0;
1072                 }
1073
1074                 /* queue should always be active in new TX path */
1075                 WARN_ON(iwl_mvm_has_new_tx_api(mvm));
1076
1077                 /* If we are here - TXQ exists and needs to be re-activated */
1078                 spin_lock(&mvm->queue_info_lock);
1079                 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY;
1080                 mvmsta->tid_data[tid].is_tid_active = true;
1081                 spin_unlock(&mvm->queue_info_lock);
1082
1083                 IWL_DEBUG_TX_QUEUES(mvm, "Re-activating queue %d for TX\n",
1084                                     txq_id);
1085         }
1086
1087         if (!iwl_mvm_has_new_tx_api(mvm)) {
1088                 /* Keep track of the time of the last frame for this RA/TID */
1089                 mvm->queue_info[txq_id].last_frame_time[tid] = jiffies;
1090
1091                 /*
1092                  * If we have timed-out TIDs - schedule the worker that will
1093                  * reconfig the queues and update them
1094                  *
1095                  * Note that the mvm->queue_info_lock isn't being taken here in
1096                  * order to not serialize the TX flow. This isn't dangerous
1097                  * because scheduling mvm->add_stream_wk can't ruin the state,
1098                  * and if we DON'T schedule it due to some race condition then
1099                  * next TX we get here we will.
1100                  */
1101                 if (unlikely(mvm->queue_info[txq_id].status ==
1102                              IWL_MVM_QUEUE_SHARED &&
1103                              iwl_mvm_txq_should_update(mvm, txq_id)))
1104                         schedule_work(&mvm->add_stream_wk);
1105         }
1106
1107         IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id,
1108                      tid, txq_id, IEEE80211_SEQ_TO_SN(seq_number));
1109
1110         /* From now on, we cannot access info->control */
1111         iwl_mvm_skb_prepare_status(skb, dev_cmd);
1112
1113         if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id))
1114                 goto drop_unlock_sta;
1115
1116         if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc))
1117                 mvmsta->tid_data[tid].seq_number = seq_number + 0x10;
1118
1119         spin_unlock(&mvmsta->lock);
1120
1121         iwl_mvm_tx_pkt_queued(mvm, mvmsta, tid == IWL_MAX_TID_COUNT ? 0 : tid);
1122
1123         return 0;
1124
1125 drop_unlock_sta:
1126         iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1127         spin_unlock(&mvmsta->lock);
1128 drop:
1129         return -1;
1130 }
1131
1132 int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb,
1133                    struct ieee80211_sta *sta)
1134 {
1135         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1136         struct ieee80211_tx_info info;
1137         struct sk_buff_head mpdus_skbs;
1138         unsigned int payload_len;
1139         int ret;
1140
1141         if (WARN_ON_ONCE(!mvmsta))
1142                 return -1;
1143
1144         if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA))
1145                 return -1;
1146
1147         memcpy(&info, skb->cb, sizeof(info));
1148
1149         if (!skb_is_gso(skb))
1150                 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1151
1152         payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
1153                 tcp_hdrlen(skb) + skb->data_len;
1154
1155         if (payload_len <= skb_shinfo(skb)->gso_size)
1156                 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1157
1158         __skb_queue_head_init(&mpdus_skbs);
1159
1160         ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs);
1161         if (ret)
1162                 return ret;
1163
1164         if (WARN_ON(skb_queue_empty(&mpdus_skbs)))
1165                 return ret;
1166
1167         while (!skb_queue_empty(&mpdus_skbs)) {
1168                 skb = __skb_dequeue(&mpdus_skbs);
1169
1170                 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1171                 if (ret) {
1172                         __skb_queue_purge(&mpdus_skbs);
1173                         return ret;
1174                 }
1175         }
1176
1177         return 0;
1178 }
1179
1180 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm,
1181                                       struct ieee80211_sta *sta, u8 tid)
1182 {
1183         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1184         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1185         struct ieee80211_vif *vif = mvmsta->vif;
1186         u16 normalized_ssn;
1187
1188         lockdep_assert_held(&mvmsta->lock);
1189
1190         if ((tid_data->state == IWL_AGG_ON ||
1191              tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) &&
1192             iwl_mvm_tid_queued(mvm, tid_data) == 0) {
1193                 /*
1194                  * Now that this aggregation or DQA queue is empty tell
1195                  * mac80211 so it knows we no longer have frames buffered for
1196                  * the station on this TID (for the TIM bitmap calculation.)
1197                  */
1198                 ieee80211_sta_set_buffered(sta, tid, false);
1199         }
1200
1201         /*
1202          * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
1203          * to align the wrap around of ssn so we compare relevant values.
1204          */
1205         normalized_ssn = tid_data->ssn;
1206         if (mvm->trans->cfg->gen2)
1207                 normalized_ssn &= 0xff;
1208
1209         if (normalized_ssn != tid_data->next_reclaimed)
1210                 return;
1211
1212         switch (tid_data->state) {
1213         case IWL_EMPTYING_HW_QUEUE_ADDBA:
1214                 IWL_DEBUG_TX_QUEUES(mvm,
1215                                     "Can continue addBA flow ssn = next_recl = %d\n",
1216                                     tid_data->next_reclaimed);
1217                 tid_data->state = IWL_AGG_STARTING;
1218                 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1219                 break;
1220
1221         case IWL_EMPTYING_HW_QUEUE_DELBA:
1222                 IWL_DEBUG_TX_QUEUES(mvm,
1223                                     "Can continue DELBA flow ssn = next_recl = %d\n",
1224                                     tid_data->next_reclaimed);
1225                 tid_data->state = IWL_AGG_OFF;
1226                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1227                 break;
1228
1229         default:
1230                 break;
1231         }
1232 }
1233
1234 #ifdef CONFIG_IWLWIFI_DEBUG
1235 const char *iwl_mvm_get_tx_fail_reason(u32 status)
1236 {
1237 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
1238 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
1239
1240         switch (status & TX_STATUS_MSK) {
1241         case TX_STATUS_SUCCESS:
1242                 return "SUCCESS";
1243         TX_STATUS_POSTPONE(DELAY);
1244         TX_STATUS_POSTPONE(FEW_BYTES);
1245         TX_STATUS_POSTPONE(BT_PRIO);
1246         TX_STATUS_POSTPONE(QUIET_PERIOD);
1247         TX_STATUS_POSTPONE(CALC_TTAK);
1248         TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
1249         TX_STATUS_FAIL(SHORT_LIMIT);
1250         TX_STATUS_FAIL(LONG_LIMIT);
1251         TX_STATUS_FAIL(UNDERRUN);
1252         TX_STATUS_FAIL(DRAIN_FLOW);
1253         TX_STATUS_FAIL(RFKILL_FLUSH);
1254         TX_STATUS_FAIL(LIFE_EXPIRE);
1255         TX_STATUS_FAIL(DEST_PS);
1256         TX_STATUS_FAIL(HOST_ABORTED);
1257         TX_STATUS_FAIL(BT_RETRY);
1258         TX_STATUS_FAIL(STA_INVALID);
1259         TX_STATUS_FAIL(FRAG_DROPPED);
1260         TX_STATUS_FAIL(TID_DISABLE);
1261         TX_STATUS_FAIL(FIFO_FLUSHED);
1262         TX_STATUS_FAIL(SMALL_CF_POLL);
1263         TX_STATUS_FAIL(FW_DROP);
1264         TX_STATUS_FAIL(STA_COLOR_MISMATCH);
1265         }
1266
1267         return "UNKNOWN";
1268
1269 #undef TX_STATUS_FAIL
1270 #undef TX_STATUS_POSTPONE
1271 }
1272 #endif /* CONFIG_IWLWIFI_DEBUG */
1273
1274 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags,
1275                                enum nl80211_band band,
1276                                struct ieee80211_tx_rate *r)
1277 {
1278         if (rate_n_flags & RATE_HT_MCS_GF_MSK)
1279                 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
1280         switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
1281         case RATE_MCS_CHAN_WIDTH_20:
1282                 break;
1283         case RATE_MCS_CHAN_WIDTH_40:
1284                 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
1285                 break;
1286         case RATE_MCS_CHAN_WIDTH_80:
1287                 r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH;
1288                 break;
1289         case RATE_MCS_CHAN_WIDTH_160:
1290                 r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH;
1291                 break;
1292         }
1293         if (rate_n_flags & RATE_MCS_SGI_MSK)
1294                 r->flags |= IEEE80211_TX_RC_SHORT_GI;
1295         if (rate_n_flags & RATE_MCS_HT_MSK) {
1296                 r->flags |= IEEE80211_TX_RC_MCS;
1297                 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
1298         } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
1299                 ieee80211_rate_set_vht(
1300                         r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK,
1301                         ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
1302                                                 RATE_VHT_MCS_NSS_POS) + 1);
1303                 r->flags |= IEEE80211_TX_RC_VHT_MCS;
1304         } else {
1305                 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
1306                                                              band);
1307         }
1308 }
1309
1310 /**
1311  * translate ucode response to mac80211 tx status control values
1312  */
1313 static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags,
1314                                         struct ieee80211_tx_info *info)
1315 {
1316         struct ieee80211_tx_rate *r = &info->status.rates[0];
1317
1318         info->status.antenna =
1319                 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
1320         iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r);
1321 }
1322
1323 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm,
1324                                             u32 status)
1325 {
1326         struct iwl_fw_dbg_trigger_tlv *trig;
1327         struct iwl_fw_dbg_trigger_tx_status *status_trig;
1328         int i;
1329
1330         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TX_STATUS))
1331                 return;
1332
1333         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TX_STATUS);
1334         status_trig = (void *)trig->data;
1335
1336         if (!iwl_fw_dbg_trigger_check_stop(&mvm->fwrt, NULL, trig))
1337                 return;
1338
1339         for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) {
1340                 /* don't collect on status 0 */
1341                 if (!status_trig->statuses[i].status)
1342                         break;
1343
1344                 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK))
1345                         continue;
1346
1347                 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
1348                                         "Tx status %d was received",
1349                                         status & TX_STATUS_MSK);
1350                 break;
1351         }
1352 }
1353
1354 /**
1355  * iwl_mvm_get_scd_ssn - returns the SSN of the SCD
1356  * @tx_resp: the Tx response from the fw (agg or non-agg)
1357  *
1358  * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since
1359  * it can't know that everything will go well until the end of the AMPDU, it
1360  * can't know in advance the number of MPDUs that will be sent in the current
1361  * batch. This is why it writes the agg Tx response while it fetches the MPDUs.
1362  * Hence, it can't know in advance what the SSN of the SCD will be at the end
1363  * of the batch. This is why the SSN of the SCD is written at the end of the
1364  * whole struct at a variable offset. This function knows how to cope with the
1365  * variable offset and returns the SSN of the SCD.
1366  */
1367 static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm,
1368                                       struct iwl_mvm_tx_resp *tx_resp)
1369 {
1370         return le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) +
1371                             tx_resp->frame_count) & 0xfff;
1372 }
1373
1374 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm,
1375                                      struct iwl_rx_packet *pkt)
1376 {
1377         struct ieee80211_sta *sta;
1378         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1379         int txq_id = SEQ_TO_QUEUE(sequence);
1380         /* struct iwl_mvm_tx_resp_v3 is almost the same */
1381         struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1382         int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1383         int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1384         struct agg_tx_status *agg_status =
1385                 iwl_mvm_get_agg_status(mvm, tx_resp);
1386         u32 status = le16_to_cpu(agg_status->status);
1387         u16 ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp);
1388         struct iwl_mvm_sta *mvmsta;
1389         struct sk_buff_head skbs;
1390         u8 skb_freed = 0;
1391         u8 lq_color;
1392         u16 next_reclaimed, seq_ctl;
1393         bool is_ndp = false;
1394
1395         __skb_queue_head_init(&skbs);
1396
1397         if (iwl_mvm_has_new_tx_api(mvm))
1398                 txq_id = le16_to_cpu(tx_resp->tx_queue);
1399
1400         seq_ctl = le16_to_cpu(tx_resp->seq_ctl);
1401
1402         /* we can free until ssn % q.n_bd not inclusive */
1403         iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs);
1404
1405         while (!skb_queue_empty(&skbs)) {
1406                 struct sk_buff *skb = __skb_dequeue(&skbs);
1407                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1408                 bool flushed = false;
1409
1410                 skb_freed++;
1411
1412                 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1413
1414                 memset(&info->status, 0, sizeof(info->status));
1415
1416                 /* inform mac80211 about what happened with the frame */
1417                 switch (status & TX_STATUS_MSK) {
1418                 case TX_STATUS_SUCCESS:
1419                 case TX_STATUS_DIRECT_DONE:
1420                         info->flags |= IEEE80211_TX_STAT_ACK;
1421                         break;
1422                 case TX_STATUS_FAIL_FIFO_FLUSHED:
1423                 case TX_STATUS_FAIL_DRAIN_FLOW:
1424                         flushed = true;
1425                         break;
1426                 case TX_STATUS_FAIL_DEST_PS:
1427                         /* the FW should have stopped the queue and not
1428                          * return this status
1429                          */
1430                         WARN_ON(1);
1431                         info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
1432                         break;
1433                 default:
1434                         break;
1435                 }
1436
1437                 iwl_mvm_tx_status_check_trigger(mvm, status);
1438
1439                 info->status.rates[0].count = tx_resp->failure_frame + 1;
1440                 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate),
1441                                             info);
1442                 info->status.status_driver_data[1] =
1443                         (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate);
1444
1445                 /* Single frame failure in an AMPDU queue => send BAR */
1446                 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
1447                     !(info->flags & IEEE80211_TX_STAT_ACK) &&
1448                     !(info->flags & IEEE80211_TX_STAT_TX_FILTERED) && !flushed)
1449                         info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1450                 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1451
1452                 /* W/A FW bug: seq_ctl is wrong when the status isn't success */
1453                 if (status != TX_STATUS_SUCCESS) {
1454                         struct ieee80211_hdr *hdr = (void *)skb->data;
1455                         seq_ctl = le16_to_cpu(hdr->seq_ctrl);
1456                 }
1457
1458                 if (unlikely(!seq_ctl)) {
1459                         struct ieee80211_hdr *hdr = (void *)skb->data;
1460
1461                         /*
1462                          * If it is an NDP, we can't update next_reclaim since
1463                          * its sequence control is 0. Note that for that same
1464                          * reason, NDPs are never sent to A-MPDU'able queues
1465                          * so that we can never have more than one freed frame
1466                          * for a single Tx resonse (see WARN_ON below).
1467                          */
1468                         if (ieee80211_is_qos_nullfunc(hdr->frame_control))
1469                                 is_ndp = true;
1470                 }
1471
1472                 /*
1473                  * TODO: this is not accurate if we are freeing more than one
1474                  * packet.
1475                  */
1476                 info->status.tx_time =
1477                         le16_to_cpu(tx_resp->wireless_media_time);
1478                 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1);
1479                 lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info);
1480                 info->status.status_driver_data[0] =
1481                         RS_DRV_DATA_PACK(lq_color, tx_resp->reduced_tpc);
1482
1483                 ieee80211_tx_status(mvm->hw, skb);
1484         }
1485
1486         /* This is an aggregation queue or might become one, so we use
1487          * the ssn since: ssn = wifi seq_num % 256.
1488          * The seq_ctl is the sequence control of the packet to which
1489          * this Tx response relates. But if there is a hole in the
1490          * bitmap of the BA we received, this Tx response may allow to
1491          * reclaim the hole and all the subsequent packets that were
1492          * already acked. In that case, seq_ctl != ssn, and the next
1493          * packet to be reclaimed will be ssn and not seq_ctl. In that
1494          * case, several packets will be reclaimed even if
1495          * frame_count = 1.
1496          *
1497          * The ssn is the index (% 256) of the latest packet that has
1498          * treated (acked / dropped) + 1.
1499          */
1500         next_reclaimed = ssn;
1501
1502         IWL_DEBUG_TX_REPLY(mvm,
1503                            "TXQ %d status %s (0x%08x)\n",
1504                            txq_id, iwl_mvm_get_tx_fail_reason(status), status);
1505
1506         IWL_DEBUG_TX_REPLY(mvm,
1507                            "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
1508                            le32_to_cpu(tx_resp->initial_rate),
1509                            tx_resp->failure_frame, SEQ_TO_INDEX(sequence),
1510                            ssn, next_reclaimed, seq_ctl);
1511
1512         rcu_read_lock();
1513
1514         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1515         /*
1516          * sta can't be NULL otherwise it'd mean that the sta has been freed in
1517          * the firmware while we still have packets for it in the Tx queues.
1518          */
1519         if (WARN_ON_ONCE(!sta))
1520                 goto out;
1521
1522         if (!IS_ERR(sta)) {
1523                 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1524
1525                 iwl_mvm_tx_airtime(mvm, mvmsta,
1526                                    le16_to_cpu(tx_resp->wireless_media_time));
1527
1528                 if (tid != IWL_TID_NON_QOS && tid != IWL_MGMT_TID) {
1529                         struct iwl_mvm_tid_data *tid_data =
1530                                 &mvmsta->tid_data[tid];
1531                         bool send_eosp_ndp = false;
1532
1533                         spin_lock_bh(&mvmsta->lock);
1534
1535                         if (!is_ndp) {
1536                                 tid_data->next_reclaimed = next_reclaimed;
1537                                 IWL_DEBUG_TX_REPLY(mvm,
1538                                                    "Next reclaimed packet:%d\n",
1539                                                    next_reclaimed);
1540                         } else {
1541                                 IWL_DEBUG_TX_REPLY(mvm,
1542                                                    "NDP - don't update next_reclaimed\n");
1543                         }
1544
1545                         iwl_mvm_check_ratid_empty(mvm, sta, tid);
1546
1547                         if (mvmsta->sleep_tx_count) {
1548                                 mvmsta->sleep_tx_count--;
1549                                 if (mvmsta->sleep_tx_count &&
1550                                     !iwl_mvm_tid_queued(mvm, tid_data)) {
1551                                         /*
1552                                          * The number of frames in the queue
1553                                          * dropped to 0 even if we sent less
1554                                          * frames than we thought we had on the
1555                                          * Tx queue.
1556                                          * This means we had holes in the BA
1557                                          * window that we just filled, ask
1558                                          * mac80211 to send EOSP since the
1559                                          * firmware won't know how to do that.
1560                                          * Send NDP and the firmware will send
1561                                          * EOSP notification that will trigger
1562                                          * a call to ieee80211_sta_eosp().
1563                                          */
1564                                         send_eosp_ndp = true;
1565                                 }
1566                         }
1567
1568                         spin_unlock_bh(&mvmsta->lock);
1569                         if (send_eosp_ndp) {
1570                                 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta,
1571                                         IEEE80211_FRAME_RELEASE_UAPSD,
1572                                         1, tid, false, false);
1573                                 mvmsta->sleep_tx_count = 0;
1574                                 ieee80211_send_eosp_nullfunc(sta, tid);
1575                         }
1576                 }
1577
1578                 if (mvmsta->next_status_eosp) {
1579                         mvmsta->next_status_eosp = false;
1580                         ieee80211_sta_eosp(sta);
1581                 }
1582         } else {
1583                 mvmsta = NULL;
1584         }
1585
1586 out:
1587         rcu_read_unlock();
1588 }
1589
1590 #ifdef CONFIG_IWLWIFI_DEBUG
1591 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
1592 static const char *iwl_get_agg_tx_status(u16 status)
1593 {
1594         switch (status & AGG_TX_STATE_STATUS_MSK) {
1595         AGG_TX_STATE_(TRANSMITTED);
1596         AGG_TX_STATE_(UNDERRUN);
1597         AGG_TX_STATE_(BT_PRIO);
1598         AGG_TX_STATE_(FEW_BYTES);
1599         AGG_TX_STATE_(ABORT);
1600         AGG_TX_STATE_(TX_ON_AIR_DROP);
1601         AGG_TX_STATE_(LAST_SENT_TRY_CNT);
1602         AGG_TX_STATE_(LAST_SENT_BT_KILL);
1603         AGG_TX_STATE_(SCD_QUERY);
1604         AGG_TX_STATE_(TEST_BAD_CRC32);
1605         AGG_TX_STATE_(RESPONSE);
1606         AGG_TX_STATE_(DUMP_TX);
1607         AGG_TX_STATE_(DELAY_TX);
1608         }
1609
1610         return "UNKNOWN";
1611 }
1612
1613 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1614                                       struct iwl_rx_packet *pkt)
1615 {
1616         struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1617         struct agg_tx_status *frame_status =
1618                 iwl_mvm_get_agg_status(mvm, tx_resp);
1619         int i;
1620
1621         for (i = 0; i < tx_resp->frame_count; i++) {
1622                 u16 fstatus = le16_to_cpu(frame_status[i].status);
1623
1624                 IWL_DEBUG_TX_REPLY(mvm,
1625                                    "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
1626                                    iwl_get_agg_tx_status(fstatus),
1627                                    fstatus & AGG_TX_STATE_STATUS_MSK,
1628                                    (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >>
1629                                         AGG_TX_STATE_TRY_CNT_POS,
1630                                    le16_to_cpu(frame_status[i].sequence));
1631         }
1632 }
1633 #else
1634 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1635                                       struct iwl_rx_packet *pkt)
1636 {}
1637 #endif /* CONFIG_IWLWIFI_DEBUG */
1638
1639 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm,
1640                                   struct iwl_rx_packet *pkt)
1641 {
1642         struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1643         int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1644         int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1645         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1646         struct iwl_mvm_sta *mvmsta;
1647         int queue = SEQ_TO_QUEUE(sequence);
1648
1649         if (WARN_ON_ONCE(queue < IWL_MVM_DQA_MIN_DATA_QUEUE &&
1650                          (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)))
1651                 return;
1652
1653         if (WARN_ON_ONCE(tid == IWL_TID_NON_QOS))
1654                 return;
1655
1656         iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt);
1657
1658         rcu_read_lock();
1659
1660         mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1661
1662         if (!WARN_ON_ONCE(!mvmsta)) {
1663                 mvmsta->tid_data[tid].rate_n_flags =
1664                         le32_to_cpu(tx_resp->initial_rate);
1665                 mvmsta->tid_data[tid].tx_time =
1666                         le16_to_cpu(tx_resp->wireless_media_time);
1667                 mvmsta->tid_data[tid].lq_color =
1668                         TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info);
1669                 iwl_mvm_tx_airtime(mvm, mvmsta,
1670                                    le16_to_cpu(tx_resp->wireless_media_time));
1671         }
1672
1673         rcu_read_unlock();
1674 }
1675
1676 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1677 {
1678         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1679         struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1680
1681         if (tx_resp->frame_count == 1)
1682                 iwl_mvm_rx_tx_cmd_single(mvm, pkt);
1683         else
1684                 iwl_mvm_rx_tx_cmd_agg(mvm, pkt);
1685 }
1686
1687 static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid,
1688                                int txq, int index,
1689                                struct ieee80211_tx_info *ba_info, u32 rate)
1690 {
1691         struct sk_buff_head reclaimed_skbs;
1692         struct iwl_mvm_tid_data *tid_data;
1693         struct ieee80211_sta *sta;
1694         struct iwl_mvm_sta *mvmsta;
1695         struct sk_buff *skb;
1696         int freed;
1697
1698         if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT ||
1699                       tid > IWL_MAX_TID_COUNT,
1700                       "sta_id %d tid %d", sta_id, tid))
1701                 return;
1702
1703         rcu_read_lock();
1704
1705         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1706
1707         /* Reclaiming frames for a station that has been deleted ? */
1708         if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
1709                 rcu_read_unlock();
1710                 return;
1711         }
1712
1713         mvmsta = iwl_mvm_sta_from_mac80211(sta);
1714         tid_data = &mvmsta->tid_data[tid];
1715
1716         if (tid_data->txq_id != txq) {
1717                 IWL_ERR(mvm,
1718                         "invalid BA notification: Q %d, tid %d\n",
1719                         tid_data->txq_id, tid);
1720                 rcu_read_unlock();
1721                 return;
1722         }
1723
1724         spin_lock_bh(&mvmsta->lock);
1725
1726         __skb_queue_head_init(&reclaimed_skbs);
1727
1728         /*
1729          * Release all TFDs before the SSN, i.e. all TFDs in front of
1730          * block-ack window (we assume that they've been successfully
1731          * transmitted ... if not, it's too late anyway).
1732          */
1733         iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs);
1734
1735         tid_data->next_reclaimed = index;
1736
1737         iwl_mvm_check_ratid_empty(mvm, sta, tid);
1738
1739         freed = 0;
1740
1741         /* pack lq color from tid_data along the reduced txp */
1742         ba_info->status.status_driver_data[0] =
1743                 RS_DRV_DATA_PACK(tid_data->lq_color,
1744                                  ba_info->status.status_driver_data[0]);
1745         ba_info->status.status_driver_data[1] = (void *)(uintptr_t)rate;
1746
1747         skb_queue_walk(&reclaimed_skbs, skb) {
1748                 struct ieee80211_hdr *hdr = (void *)skb->data;
1749                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1750
1751                 if (ieee80211_is_data_qos(hdr->frame_control))
1752                         freed++;
1753                 else
1754                         WARN_ON_ONCE(tid != IWL_MAX_TID_COUNT);
1755
1756                 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1757
1758                 memset(&info->status, 0, sizeof(info->status));
1759                 /* Packet was transmitted successfully, failures come as single
1760                  * frames because before failing a frame the firmware transmits
1761                  * it without aggregation at least once.
1762                  */
1763                 info->flags |= IEEE80211_TX_STAT_ACK;
1764
1765                 /* this is the first skb we deliver in this batch */
1766                 /* put the rate scaling data there */
1767                 if (freed == 1) {
1768                         info->flags |= IEEE80211_TX_STAT_AMPDU;
1769                         memcpy(&info->status, &ba_info->status,
1770                                sizeof(ba_info->status));
1771                         iwl_mvm_hwrate_to_tx_status(rate, info);
1772                 }
1773         }
1774
1775         spin_unlock_bh(&mvmsta->lock);
1776
1777         /* We got a BA notif with 0 acked or scd_ssn didn't progress which is
1778          * possible (i.e. first MPDU in the aggregation wasn't acked)
1779          * Still it's important to update RS about sent vs. acked.
1780          */
1781         if (skb_queue_empty(&reclaimed_skbs)) {
1782                 struct ieee80211_chanctx_conf *chanctx_conf = NULL;
1783
1784                 if (mvmsta->vif)
1785                         chanctx_conf =
1786                                 rcu_dereference(mvmsta->vif->chanctx_conf);
1787
1788                 if (WARN_ON_ONCE(!chanctx_conf))
1789                         goto out;
1790
1791                 ba_info->band = chanctx_conf->def.chan->band;
1792                 iwl_mvm_hwrate_to_tx_status(rate, ba_info);
1793
1794                 if (!iwl_mvm_has_tlc_offload(mvm)) {
1795                         IWL_DEBUG_TX_REPLY(mvm,
1796                                            "No reclaim. Update rs directly\n");
1797                         iwl_mvm_rs_tx_status(mvm, sta, tid, ba_info, false);
1798                 }
1799         }
1800
1801 out:
1802         rcu_read_unlock();
1803
1804         while (!skb_queue_empty(&reclaimed_skbs)) {
1805                 skb = __skb_dequeue(&reclaimed_skbs);
1806                 ieee80211_tx_status(mvm->hw, skb);
1807         }
1808 }
1809
1810 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1811 {
1812         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1813         int sta_id, tid, txq, index;
1814         struct ieee80211_tx_info ba_info = {};
1815         struct iwl_mvm_ba_notif *ba_notif;
1816         struct iwl_mvm_tid_data *tid_data;
1817         struct iwl_mvm_sta *mvmsta;
1818
1819         ba_info.flags = IEEE80211_TX_STAT_AMPDU;
1820
1821         if (iwl_mvm_has_new_tx_api(mvm)) {
1822                 struct iwl_mvm_compressed_ba_notif *ba_res =
1823                         (void *)pkt->data;
1824                 u8 lq_color = TX_RES_RATE_TABLE_COL_GET(ba_res->tlc_rate_info);
1825                 int i;
1826
1827                 sta_id = ba_res->sta_id;
1828                 ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done);
1829                 ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed);
1830                 ba_info.status.tx_time =
1831                         (u16)le32_to_cpu(ba_res->wireless_time);
1832                 ba_info.status.status_driver_data[0] =
1833                         (void *)(uintptr_t)ba_res->reduced_txp;
1834
1835                 if (!le16_to_cpu(ba_res->tfd_cnt))
1836                         goto out;
1837
1838                 rcu_read_lock();
1839
1840                 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1841                 if (!mvmsta)
1842                         goto out_unlock;
1843
1844                 /* Free per TID */
1845                 for (i = 0; i < le16_to_cpu(ba_res->tfd_cnt); i++) {
1846                         struct iwl_mvm_compressed_ba_tfd *ba_tfd =
1847                                 &ba_res->tfd[i];
1848
1849                         tid = ba_tfd->tid;
1850                         if (tid == IWL_MGMT_TID)
1851                                 tid = IWL_MAX_TID_COUNT;
1852
1853                         mvmsta->tid_data[i].lq_color = lq_color;
1854                         iwl_mvm_tx_reclaim(mvm, sta_id, tid,
1855                                            (int)(le16_to_cpu(ba_tfd->q_num)),
1856                                            le16_to_cpu(ba_tfd->tfd_index),
1857                                            &ba_info,
1858                                            le32_to_cpu(ba_res->tx_rate));
1859                 }
1860
1861                 iwl_mvm_tx_airtime(mvm, mvmsta,
1862                                    le32_to_cpu(ba_res->wireless_time));
1863 out_unlock:
1864                 rcu_read_unlock();
1865 out:
1866                 IWL_DEBUG_TX_REPLY(mvm,
1867                                    "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n",
1868                                    sta_id, le32_to_cpu(ba_res->flags),
1869                                    le16_to_cpu(ba_res->txed),
1870                                    le16_to_cpu(ba_res->done));
1871                 return;
1872         }
1873
1874         ba_notif = (void *)pkt->data;
1875         sta_id = ba_notif->sta_id;
1876         tid = ba_notif->tid;
1877         /* "flow" corresponds to Tx queue */
1878         txq = le16_to_cpu(ba_notif->scd_flow);
1879         /* "ssn" is start of block-ack Tx window, corresponds to index
1880          * (in Tx queue's circular buffer) of first TFD/frame in window */
1881         index = le16_to_cpu(ba_notif->scd_ssn);
1882
1883         rcu_read_lock();
1884         mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1885         if (WARN_ON_ONCE(!mvmsta)) {
1886                 rcu_read_unlock();
1887                 return;
1888         }
1889
1890         tid_data = &mvmsta->tid_data[tid];
1891
1892         ba_info.status.ampdu_ack_len = ba_notif->txed_2_done;
1893         ba_info.status.ampdu_len = ba_notif->txed;
1894         ba_info.status.tx_time = tid_data->tx_time;
1895         ba_info.status.status_driver_data[0] =
1896                 (void *)(uintptr_t)ba_notif->reduced_txp;
1897
1898         rcu_read_unlock();
1899
1900         iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info,
1901                            tid_data->rate_n_flags);
1902
1903         IWL_DEBUG_TX_REPLY(mvm,
1904                            "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
1905                            ba_notif->sta_addr, ba_notif->sta_id);
1906
1907         IWL_DEBUG_TX_REPLY(mvm,
1908                            "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
1909                            ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl),
1910                            le64_to_cpu(ba_notif->bitmap), txq, index,
1911                            ba_notif->txed, ba_notif->txed_2_done);
1912
1913         IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n",
1914                            ba_notif->reduced_txp);
1915 }
1916
1917 /*
1918  * Note that there are transports that buffer frames before they reach
1919  * the firmware. This means that after flush_tx_path is called, the
1920  * queue might not be empty. The race-free way to handle this is to:
1921  * 1) set the station as draining
1922  * 2) flush the Tx path
1923  * 3) wait for the transport queues to be empty
1924  */
1925 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, u32 flags)
1926 {
1927         int ret;
1928         struct iwl_tx_path_flush_cmd_v1 flush_cmd = {
1929                 .queues_ctl = cpu_to_le32(tfd_msk),
1930                 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH),
1931         };
1932
1933         WARN_ON(iwl_mvm_has_new_tx_api(mvm));
1934
1935         ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags,
1936                                    sizeof(flush_cmd), &flush_cmd);
1937         if (ret)
1938                 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
1939         return ret;
1940 }
1941
1942 int iwl_mvm_flush_sta_tids(struct iwl_mvm *mvm, u32 sta_id,
1943                            u16 tids, u32 flags)
1944 {
1945         int ret;
1946         struct iwl_tx_path_flush_cmd flush_cmd = {
1947                 .sta_id = cpu_to_le32(sta_id),
1948                 .tid_mask = cpu_to_le16(tids),
1949         };
1950
1951         WARN_ON(!iwl_mvm_has_new_tx_api(mvm));
1952
1953         ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags,
1954                                    sizeof(flush_cmd), &flush_cmd);
1955         if (ret)
1956                 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
1957         return ret;
1958 }
1959
1960 int iwl_mvm_flush_sta(struct iwl_mvm *mvm, void *sta, bool internal, u32 flags)
1961 {
1962         struct iwl_mvm_int_sta *int_sta = sta;
1963         struct iwl_mvm_sta *mvm_sta = sta;
1964
1965         BUILD_BUG_ON(offsetof(struct iwl_mvm_int_sta, sta_id) !=
1966                      offsetof(struct iwl_mvm_sta, sta_id));
1967
1968         if (iwl_mvm_has_new_tx_api(mvm))
1969                 return iwl_mvm_flush_sta_tids(mvm, mvm_sta->sta_id,
1970                                               0xff | BIT(IWL_MGMT_TID), flags);
1971
1972         if (internal)
1973                 return iwl_mvm_flush_tx_path(mvm, int_sta->tfd_queue_msk,
1974                                              flags);
1975
1976         return iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, flags);
1977 }