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
 488         memset(dev_cmd, 0, sizeof(dev_cmd->hdr) + sizeof(*tx_cmd));
 489         dev_cmd->hdr.cmd = TX_CMD;
 490
 491         if (iwl_mvm_has_new_tx_api(mvm)) {
 492                 struct iwl_tx_cmd_gen2 *cmd = (void *)dev_cmd->payload;
 493                 u16 offload_assist = 0;
 494
 495                 if (ieee80211_is_data_qos(hdr->frame_control)) {
 496                         u8 *qc = ieee80211_get_qos_ctl(hdr);
 497
 498                         if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT)
 499                                 offload_assist |= BIT(TX_CMD_OFFLD_AMSDU);
 500                 }
 501
 502                 offload_assist = iwl_mvm_tx_csum(mvm, skb, hdr, info,
 503                                                  offload_assist);
 504
 505                 /* padding is inserted later in transport */
 506                 if (ieee80211_hdrlen(hdr->frame_control) % 4 &&
 507                     !(offload_assist & BIT(TX_CMD_OFFLD_AMSDU)))
 508                         offload_assist |= BIT(TX_CMD_OFFLD_PAD);
 509
 510                 cmd->offload_assist |= cpu_to_le16(offload_assist);
 511
 512                 /* Total # bytes to be transmitted */
 513                 cmd->len = cpu_to_le16((u16)skb->len);
 514
 515                 /* Copy MAC header from skb into command buffer */
 516                 memcpy(cmd->hdr, hdr, hdrlen);
 517
 518                 if (!info->control.hw_key)
 519                         cmd->flags |= cpu_to_le32(IWL_TX_FLAGS_ENCRYPT_DIS);
 520
 521                 /* For data packets rate info comes from the fw */
 522                 if (ieee80211_is_data(hdr->frame_control) && sta)
 523                         goto out;
 524
 525                 cmd->flags |= cpu_to_le32(IWL_TX_FLAGS_CMD_RATE);
 526                 cmd->rate_n_flags =
 527                         cpu_to_le32(iwl_mvm_get_tx_rate(mvm, info, sta));
 528
 529                 goto out;
 530         }
 531
 532         tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
 533
 534         if (info->control.hw_key)
 535                 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen);
 536
 537         iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id);
 538
 539         iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control);
 540
 541         /* Copy MAC header from skb into command buffer */
 542         memcpy(tx_cmd->hdr, hdr, hdrlen);
 543
 544 out:
 545         return dev_cmd;
 546 }
 547
 548 static void iwl_mvm_skb_prepare_status(struct sk_buff *skb,
 549                                        struct iwl_device_cmd *cmd)
 550 {
 551         struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb);
 552
 553         memset(&skb_info->status, 0, sizeof(skb_info->status));
 554         memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data));
 555
 556         skb_info->driver_data[1] = cmd;
 557 }
 558
 559 static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm,
 560                                       struct ieee80211_tx_info *info, __le16 fc)
 561 {
 562         struct iwl_mvm_vif *mvmvif;
 563
 564         mvmvif = iwl_mvm_vif_from_mac80211(info->control.vif);
 565
 566         switch (info->control.vif->type) {
 567         case NL80211_IFTYPE_AP:
 568         case NL80211_IFTYPE_ADHOC:
 569                 /*
 570                  * Non-bufferable frames use the broadcast station, thus they
 571                  * use the probe queue.
 572                  * Also take care of the case where we send a deauth to a
 573                  * station that we don't have, or similarly an association
 574                  * response (with non-success status) for a station we can't
 575                  * accept.
 576                  * Also, disassociate frames might happen, particular with
 577                  * reason 7 ("Class 3 frame received from nonassociated STA").
 578                  */
 579                 if (ieee80211_is_mgmt(fc) &&
 580                     (!ieee80211_is_bufferable_mmpdu(fc) ||
 581                      ieee80211_is_deauth(fc) || ieee80211_is_disassoc(fc)))
 582                         return mvm->probe_queue;
 583                 if (info->hw_queue == info->control.vif->cab_queue)
 584                         return mvmvif->cab_queue;
 585
 586                 WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC,
 587                           "fc=0x%02x", le16_to_cpu(fc));
 588                 return mvm->probe_queue;
 589         case NL80211_IFTYPE_P2P_DEVICE:
 590                 if (ieee80211_is_mgmt(fc))
 591                         return mvm->p2p_dev_queue;
 592                 if (info->hw_queue == info->control.vif->cab_queue)
 593                         return mvmvif->cab_queue;
 594
 595                 WARN_ON_ONCE(1);
 596                 return mvm->p2p_dev_queue;
 597         default:
 598                 WARN_ONCE(1, "Not a ctrl vif, no available queue\n");
 599                 return -1;
 600         }
 601 }
 602
 603 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb)
 604 {
 605         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 606         struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb);
 607         struct ieee80211_tx_info info;
 608         struct iwl_device_cmd *dev_cmd;
 609         u8 sta_id;
 610         int hdrlen = ieee80211_hdrlen(hdr->frame_control);
 611         int queue;
 612
 613         /* IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets that can be used
 614          * in 2 different types of vifs, P2P & STATION. P2P uses the offchannel
 615          * queue. STATION (HS2.0) uses the auxiliary context of the FW,
 616          * and hence needs to be sent on the aux queue
 617          */
 618         if (skb_info->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
 619             skb_info->control.vif->type == NL80211_IFTYPE_STATION)
 620                 skb_info->hw_queue = mvm->aux_queue;
 621
 622         memcpy(&info, skb->cb, sizeof(info));
 623
 624         if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU))
 625                 return -1;
 626
 627         if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM &&
 628                          (!info.control.vif ||
 629                           info.hw_queue != info.control.vif->cab_queue)))
 630                 return -1;
 631
 632         queue = info.hw_queue;
 633
 634         /*
 635          * If the interface on which the frame is sent is the P2P_DEVICE
 636          * or an AP/GO interface use the broadcast station associated
 637          * with it; otherwise if the interface is a managed interface
 638          * use the AP station associated with it for multicast traffic
 639          * (this is not possible for unicast packets as a TLDS discovery
 640          * response are sent without a station entry); otherwise use the
 641          * AUX station.
 642          */
 643         sta_id = mvm->aux_sta.sta_id;
 644         if (info.control.vif) {
 645                 struct iwl_mvm_vif *mvmvif =
 646                         iwl_mvm_vif_from_mac80211(info.control.vif);
 647
 648                 if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE ||
 649                     info.control.vif->type == NL80211_IFTYPE_AP ||
 650                     info.control.vif->type == NL80211_IFTYPE_ADHOC) {
 651                         if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE)
 652                                 sta_id = mvmvif->bcast_sta.sta_id;
 653                         else
 654                                 sta_id = mvmvif->mcast_sta.sta_id;
 655
 656                         queue = iwl_mvm_get_ctrl_vif_queue(mvm, &info,
 657                                                            hdr->frame_control);
 658                         if (queue < 0)
 659                                 return -1;
 660                 } else if (info.control.vif->type == NL80211_IFTYPE_STATION &&
 661                            is_multicast_ether_addr(hdr->addr1)) {
 662                         u8 ap_sta_id = READ_ONCE(mvmvif->ap_sta_id);
 663
 664                         if (ap_sta_id != IWL_MVM_INVALID_STA)
 665                                 sta_id = ap_sta_id;
 666                 } else if (info.control.vif->type == NL80211_IFTYPE_MONITOR) {
 667                         queue = mvm->snif_queue;
 668                         sta_id = mvm->snif_sta.sta_id;
 669                 }
 670         }
 671
 672         IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue);
 673
 674         dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id);
 675         if (!dev_cmd)
 676                 return -1;
 677
 678         /* From now on, we cannot access info->control */
 679         iwl_mvm_skb_prepare_status(skb, dev_cmd);
 680
 681         if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) {
 682                 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
 683                 return -1;
 684         }
 685
 686         return 0;
 687 }
 688
 689 #ifdef CONFIG_INET
 690
 691 static int
 692 iwl_mvm_tx_tso_segment(struct sk_buff *skb, unsigned int num_subframes,
 693                        netdev_features_t netdev_flags,
 694                        struct sk_buff_head *mpdus_skb)
 695 {
 696         struct sk_buff *tmp, *next;
 697         struct ieee80211_hdr *hdr = (void *)skb->data;
 698         char cb[sizeof(skb->cb)];
 699         u16 i = 0;
 700         unsigned int tcp_payload_len;
 701         unsigned int mss = skb_shinfo(skb)->gso_size;
 702         bool ipv4 = (skb->protocol == htons(ETH_P_IP));
 703         u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0;
 704
 705         skb_shinfo(skb)->gso_size = num_subframes * mss;
 706         memcpy(cb, skb->cb, sizeof(cb));
 707
 708         next = skb_gso_segment(skb, netdev_flags);
 709         skb_shinfo(skb)->gso_size = mss;
 710         if (WARN_ON_ONCE(IS_ERR(next)))
 711                 return -EINVAL;
 712         else if (next)
 713                 consume_skb(skb);
 714
 715         while (next) {
 716                 tmp = next;
 717                 next = tmp->next;
 718
 719                 memcpy(tmp->cb, cb, sizeof(tmp->cb));
 720                 /*
 721                  * Compute the length of all the data added for the A-MSDU.
 722                  * This will be used to compute the length to write in the TX
 723                  * command. We have: SNAP + IP + TCP for n -1 subframes and
 724                  * ETH header for n subframes.
 725                  */
 726                 tcp_payload_len = skb_tail_pointer(tmp) -
 727                         skb_transport_header(tmp) -
 728                         tcp_hdrlen(tmp) + tmp->data_len;
 729
 730                 if (ipv4)
 731                         ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes);
 732
 733                 if (tcp_payload_len > mss) {
 734                         skb_shinfo(tmp)->gso_size = mss;
 735                 } else {
 736                         if (ieee80211_is_data_qos(hdr->frame_control)) {
 737                                 u8 *qc;
 738
 739                                 if (ipv4)
 740                                         ip_send_check(ip_hdr(tmp));
 741
 742                                 qc = ieee80211_get_qos_ctl((void *)tmp->data);
 743                                 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
 744                         }
 745                         skb_shinfo(tmp)->gso_size = 0;
 746                 }
 747
 748                 tmp->prev = NULL;
 749                 tmp->next = NULL;
 750
 751                 __skb_queue_tail(mpdus_skb, tmp);
 752                 i++;
 753         }
 754
 755         return 0;
 756 }
 757
 758 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
 759                           struct ieee80211_tx_info *info,
 760                           struct ieee80211_sta *sta,
 761                           struct sk_buff_head *mpdus_skb)
 762 {
 763         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 764         struct ieee80211_hdr *hdr = (void *)skb->data;
 765         unsigned int mss = skb_shinfo(skb)->gso_size;
 766         unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len;
 767         u16 snap_ip_tcp, pad;
 768         unsigned int dbg_max_amsdu_len;
 769         netdev_features_t netdev_flags = NETIF_F_CSUM_MASK | NETIF_F_SG;
 770         u8 tid, txf;
 771
 772         snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) +
 773                 tcp_hdrlen(skb);
 774
 775         dbg_max_amsdu_len = READ_ONCE(mvm->max_amsdu_len);
 776
 777         if (!mvmsta->max_amsdu_len ||
 778             !ieee80211_is_data_qos(hdr->frame_control) ||
 779             (!mvmsta->amsdu_enabled && !dbg_max_amsdu_len))
 780                 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
 781
 782         /*
 783          * Do not build AMSDU for IPv6 with extension headers.
 784          * ask stack to segment and checkum the generated MPDUs for us.
 785          */
 786         if (skb->protocol == htons(ETH_P_IPV6) &&
 787             ((struct ipv6hdr *)skb_network_header(skb))->nexthdr !=
 788             IPPROTO_TCP) {
 789                 netdev_flags &= ~NETIF_F_CSUM_MASK;
 790                 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
 791         }
 792
 793         tid = ieee80211_get_tid(hdr);
 794         if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
 795                 return -EINVAL;
 796
 797         /*
 798          * No need to lock amsdu_in_ampdu_allowed since it can't be modified
 799          * during an BA session.
 800          */
 801         if (info->flags & IEEE80211_TX_CTL_AMPDU &&
 802             !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed)
 803                 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
 804
 805         if (iwl_mvm_vif_low_latency(iwl_mvm_vif_from_mac80211(mvmsta->vif)) ||
 806             tid_to_mac80211_ac[tid] < IEEE80211_AC_BE ||
 807             !(mvmsta->amsdu_enabled & BIT(tid)))
 808                 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
 809
 810         max_amsdu_len = mvmsta->max_amsdu_len;
 811
 812         /* the Tx FIFO to which this A-MSDU will be routed */
 813         txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, tid_to_mac80211_ac[tid]);
 814
 815         /*
 816          * Don't send an AMSDU that will be longer than the TXF.
 817          * Add a security margin of 256 for the TX command + headers.
 818          * We also want to have the start of the next packet inside the
 819          * fifo to be able to send bursts.
 820          */
 821         max_amsdu_len = min_t(unsigned int, max_amsdu_len,
 822                               mvm->fwrt.smem_cfg.lmac[0].txfifo_size[txf] -
 823                               256);
 824
 825         if (unlikely(dbg_max_amsdu_len))
 826                 max_amsdu_len = min_t(unsigned int, max_amsdu_len,
 827                                       dbg_max_amsdu_len);
 828
 829         /*
 830          * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not
 831          * supported. This is a spec requirement (IEEE 802.11-2015
 832          * section 8.7.3 NOTE 3).
 833          */
 834         if (info->flags & IEEE80211_TX_CTL_AMPDU &&
 835             !sta->vht_cap.vht_supported)
 836                 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095);
 837
 838         /* Sub frame header + SNAP + IP header + TCP header + MSS */
 839         subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss;
 840         pad = (4 - subf_len) & 0x3;
 841
 842         /*
 843          * If we have N subframes in the A-MSDU, then the A-MSDU's size is
 844          * N * subf_len + (N - 1) * pad.
 845          */
 846         num_subframes = (max_amsdu_len + pad) / (subf_len + pad);
 847         if (num_subframes > 1)
 848                 *ieee80211_get_qos_ctl(hdr) |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
 849
 850         tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
 851                 tcp_hdrlen(skb) + skb->data_len;
 852
 853         /*
 854          * Make sure we have enough TBs for the A-MSDU:
 855          *      2 for each subframe
 856          *      1 more for each fragment
 857          *      1 more for the potential data in the header
 858          */
 859         num_subframes =
 860                 min_t(unsigned int, num_subframes,
 861                       (mvm->trans->max_skb_frags - 1 -
 862                        skb_shinfo(skb)->nr_frags) / 2);
 863
 864         /* This skb fits in one single A-MSDU */
 865         if (num_subframes * mss >= tcp_payload_len) {
 866                 __skb_queue_tail(mpdus_skb, skb);
 867                 return 0;
 868         }
 869
 870         /*
 871          * Trick the segmentation function to make it
 872          * create SKBs that can fit into one A-MSDU.
 873          */
 874         return iwl_mvm_tx_tso_segment(skb, num_subframes, netdev_flags,
 875                                       mpdus_skb);
 876 }
 877 #else /* CONFIG_INET */
 878 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
 879                           struct ieee80211_tx_info *info,
 880                           struct ieee80211_sta *sta,
 881                           struct sk_buff_head *mpdus_skb)
 882 {
 883         /* Impossible to get TSO with CONFIG_INET */
 884         WARN_ON(1);
 885
 886         return -1;
 887 }
 888 #endif
 889
 890 static void iwl_mvm_tx_add_stream(struct iwl_mvm *mvm,
 891                                   struct iwl_mvm_sta *mvm_sta, u8 tid,
 892                                   struct sk_buff *skb)
 893 {
 894         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 895         u8 mac_queue = info->hw_queue;
 896         struct sk_buff_head *deferred_tx_frames;
 897
 898         lockdep_assert_held(&mvm_sta->lock);
 899
 900         mvm_sta->deferred_traffic_tid_map |= BIT(tid);
 901         set_bit(mvm_sta->sta_id, mvm->sta_deferred_frames);
 902
 903         deferred_tx_frames = &mvm_sta->tid_data[tid].deferred_tx_frames;
 904
 905         skb_queue_tail(deferred_tx_frames, skb);
 906
 907         /*
 908          * The first deferred frame should've stopped the MAC queues, so we
 909          * should never get a second deferred frame for the RA/TID.
 910          * In case of GSO the first packet may have been split, so don't warn.
 911          */
 912         if (skb_queue_len(deferred_tx_frames) == 1) {
 913                 iwl_mvm_stop_mac_queues(mvm, BIT(mac_queue));
 914                 schedule_work(&mvm->add_stream_wk);
 915         }
 916 }
 917
 918 /* Check if there are any timed-out TIDs on a given shared TXQ */
 919 static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id)
 920 {
 921         unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap;
 922         unsigned long now = jiffies;
 923         int tid;
 924
 925         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 926                 return false;
 927
 928         for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) {
 929                 if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] +
 930                                 IWL_MVM_DQA_QUEUE_TIMEOUT, now))
 931                         return true;
 932         }
 933
 934         return false;
 935 }
 936
 937 static void iwl_mvm_tx_airtime(struct iwl_mvm *mvm,
 938                                struct iwl_mvm_sta *mvmsta,
 939                                int airtime)
 940 {
 941         int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
 942         struct iwl_mvm_tcm_mac *mdata = &mvm->tcm.data[mac];
 943
 944         if (mvm->tcm.paused)
 945                 return;
 946
 947         if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD))
 948                 schedule_delayed_work(&mvm->tcm.work, 0);
 949
 950         mdata->tx.airtime += airtime;
 951 }
 952
 953 static void iwl_mvm_tx_pkt_queued(struct iwl_mvm *mvm,
 954                                   struct iwl_mvm_sta *mvmsta, int tid)
 955 {
 956         u32 ac = tid_to_mac80211_ac[tid];
 957         int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
 958         struct iwl_mvm_tcm_mac *mdata = &mvm->tcm.data[mac];
 959
 960         mdata->tx.pkts[ac]++;
 961 }
 962
 963 /*
 964  * Sets the fields in the Tx cmd that are crypto related
 965  */
 966 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb,
 967                            struct ieee80211_tx_info *info,
 968                            struct ieee80211_sta *sta)
 969 {
 970         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 971         struct iwl_mvm_sta *mvmsta;
 972         struct iwl_device_cmd *dev_cmd;
 973         __le16 fc;
 974         u16 seq_number = 0;
 975         u8 tid = IWL_MAX_TID_COUNT;
 976         u16 txq_id = info->hw_queue;
 977         bool is_ampdu = false;
 978         int hdrlen;
 979
 980         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 981         fc = hdr->frame_control;
 982         hdrlen = ieee80211_hdrlen(fc);
 983
 984         if (WARN_ON_ONCE(!mvmsta))
 985                 return -1;
 986
 987         if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA))
 988                 return -1;
 989
 990         dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen,
 991                                         sta, mvmsta->sta_id);
 992         if (!dev_cmd)
 993                 goto drop;
 994
 995         /*
 996          * we handle that entirely ourselves -- for uAPSD the firmware
 997          * will always send a notification, and for PS-Poll responses
 998          * we'll notify mac80211 when getting frame status
 999          */
1000         info->flags &= ~IEEE80211_TX_STATUS_EOSP;
1001
1002         spin_lock(&mvmsta->lock);
1003
1004         /* nullfunc frames should go to the MGMT queue regardless of QOS,
1005          * the condition of !ieee80211_is_qos_nullfunc(fc) keeps the default
1006          * assignment of MGMT TID
1007          */
1008         if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
1009                 tid = ieee80211_get_tid(hdr);
1010                 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
1011                         goto drop_unlock_sta;
1012
1013                 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU;
1014                 if (WARN_ON_ONCE(is_ampdu &&
1015                                  mvmsta->tid_data[tid].state != IWL_AGG_ON))
1016                         goto drop_unlock_sta;
1017
1018                 seq_number = mvmsta->tid_data[tid].seq_number;
1019                 seq_number &= IEEE80211_SCTL_SEQ;
1020
1021                 if (!iwl_mvm_has_new_tx_api(mvm)) {
1022                         struct iwl_tx_cmd *tx_cmd = (void *)dev_cmd->payload;
1023
1024                         hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
1025                         hdr->seq_ctrl |= cpu_to_le16(seq_number);
1026                         /* update the tx_cmd hdr as it was already copied */
1027                         tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl;
1028                 }
1029         }
1030
1031         txq_id = mvmsta->tid_data[tid].txq_id;
1032
1033         WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
1034
1035         /* Check if TXQ needs to be allocated or re-activated */
1036         if (unlikely(txq_id == IWL_MVM_INVALID_QUEUE ||
1037                      !mvmsta->tid_data[tid].is_tid_active)) {
1038                 /* If TXQ needs to be allocated... */
1039                 if (txq_id == IWL_MVM_INVALID_QUEUE) {
1040                         iwl_mvm_tx_add_stream(mvm, mvmsta, tid, skb);
1041
1042                         /*
1043                          * The frame is now deferred, and the worker scheduled
1044                          * will re-allocate it, so we can free it for now.
1045                          */
1046                         iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1047                         spin_unlock(&mvmsta->lock);
1048                         return 0;
1049                 }
1050
1051                 /* queue should always be active in new TX path */
1052                 WARN_ON(iwl_mvm_has_new_tx_api(mvm));
1053
1054                 /* If we are here - TXQ exists and needs to be re-activated */
1055                 spin_lock(&mvm->queue_info_lock);
1056                 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY;
1057                 mvmsta->tid_data[tid].is_tid_active = true;
1058                 spin_unlock(&mvm->queue_info_lock);
1059
1060                 IWL_DEBUG_TX_QUEUES(mvm, "Re-activating queue %d for TX\n",
1061                                     txq_id);
1062         }
1063
1064         if (!iwl_mvm_has_new_tx_api(mvm)) {
1065                 /* Keep track of the time of the last frame for this RA/TID */
1066                 mvm->queue_info[txq_id].last_frame_time[tid] = jiffies;
1067
1068                 /*
1069                  * If we have timed-out TIDs - schedule the worker that will
1070                  * reconfig the queues and update them
1071                  *
1072                  * Note that the mvm->queue_info_lock isn't being taken here in
1073                  * order to not serialize the TX flow. This isn't dangerous
1074                  * because scheduling mvm->add_stream_wk can't ruin the state,
1075                  * and if we DON'T schedule it due to some race condition then
1076                  * next TX we get here we will.
1077                  */
1078                 if (unlikely(mvm->queue_info[txq_id].status ==
1079                              IWL_MVM_QUEUE_SHARED &&
1080                              iwl_mvm_txq_should_update(mvm, txq_id)))
1081                         schedule_work(&mvm->add_stream_wk);
1082         }
1083
1084         IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id,
1085                      tid, txq_id, IEEE80211_SEQ_TO_SN(seq_number));
1086
1087         /* From now on, we cannot access info->control */
1088         iwl_mvm_skb_prepare_status(skb, dev_cmd);
1089
1090         if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id))
1091                 goto drop_unlock_sta;
1092
1093         if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc))
1094                 mvmsta->tid_data[tid].seq_number = seq_number + 0x10;
1095
1096         spin_unlock(&mvmsta->lock);
1097
1098         iwl_mvm_tx_pkt_queued(mvm, mvmsta, tid == IWL_MAX_TID_COUNT ? 0 : tid);
1099
1100         return 0;
1101
1102 drop_unlock_sta:
1103         iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1104         spin_unlock(&mvmsta->lock);
1105 drop:
1106         return -1;
1107 }
1108
1109 int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb,
1110                    struct ieee80211_sta *sta)
1111 {
1112         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1113         struct ieee80211_tx_info info;
1114         struct sk_buff_head mpdus_skbs;
1115         unsigned int payload_len;
1116         int ret;
1117
1118         if (WARN_ON_ONCE(!mvmsta))
1119                 return -1;
1120
1121         if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA))
1122                 return -1;
1123
1124         memcpy(&info, skb->cb, sizeof(info));
1125
1126         if (!skb_is_gso(skb))
1127                 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1128
1129         payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
1130                 tcp_hdrlen(skb) + skb->data_len;
1131
1132         if (payload_len <= skb_shinfo(skb)->gso_size)
1133                 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1134
1135         __skb_queue_head_init(&mpdus_skbs);
1136
1137         ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs);
1138         if (ret)
1139                 return ret;
1140
1141         if (WARN_ON(skb_queue_empty(&mpdus_skbs)))
1142                 return ret;
1143
1144         while (!skb_queue_empty(&mpdus_skbs)) {
1145                 skb = __skb_dequeue(&mpdus_skbs);
1146
1147                 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1148                 if (ret) {
1149                         __skb_queue_purge(&mpdus_skbs);
1150                         return ret;
1151                 }
1152         }
1153
1154         return 0;
1155 }
1156
1157 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm,
1158                                       struct ieee80211_sta *sta, u8 tid)
1159 {
1160         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1161         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1162         struct ieee80211_vif *vif = mvmsta->vif;
1163         u16 normalized_ssn;
1164
1165         lockdep_assert_held(&mvmsta->lock);
1166
1167         if ((tid_data->state == IWL_AGG_ON ||
1168              tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) &&
1169             iwl_mvm_tid_queued(mvm, tid_data) == 0) {
1170                 /*
1171                  * Now that this aggregation or DQA queue is empty tell
1172                  * mac80211 so it knows we no longer have frames buffered for
1173                  * the station on this TID (for the TIM bitmap calculation.)
1174                  */
1175                 ieee80211_sta_set_buffered(sta, tid, false);
1176         }
1177
1178         /*
1179          * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
1180          * to align the wrap around of ssn so we compare relevant values.
1181          */
1182         normalized_ssn = tid_data->ssn;
1183         if (mvm->trans->cfg->gen2)
1184                 normalized_ssn &= 0xff;
1185
1186         if (normalized_ssn != tid_data->next_reclaimed)
1187                 return;
1188
1189         switch (tid_data->state) {
1190         case IWL_EMPTYING_HW_QUEUE_ADDBA:
1191                 IWL_DEBUG_TX_QUEUES(mvm,
1192                                     "Can continue addBA flow ssn = next_recl = %d\n",
1193                                     tid_data->next_reclaimed);
1194                 tid_data->state = IWL_AGG_STARTING;
1195                 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1196                 break;
1197
1198         case IWL_EMPTYING_HW_QUEUE_DELBA:
1199                 IWL_DEBUG_TX_QUEUES(mvm,
1200                                     "Can continue DELBA flow ssn = next_recl = %d\n",
1201                                     tid_data->next_reclaimed);
1202                 tid_data->state = IWL_AGG_OFF;
1203                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1204                 break;
1205
1206         default:
1207                 break;
1208         }
1209 }
1210
1211 #ifdef CONFIG_IWLWIFI_DEBUG
1212 const char *iwl_mvm_get_tx_fail_reason(u32 status)
1213 {
1214 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
1215 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
1216
1217         switch (status & TX_STATUS_MSK) {
1218         case TX_STATUS_SUCCESS:
1219                 return "SUCCESS";
1220         TX_STATUS_POSTPONE(DELAY);
1221         TX_STATUS_POSTPONE(FEW_BYTES);
1222         TX_STATUS_POSTPONE(BT_PRIO);
1223         TX_STATUS_POSTPONE(QUIET_PERIOD);
1224         TX_STATUS_POSTPONE(CALC_TTAK);
1225         TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
1226         TX_STATUS_FAIL(SHORT_LIMIT);
1227         TX_STATUS_FAIL(LONG_LIMIT);
1228         TX_STATUS_FAIL(UNDERRUN);
1229         TX_STATUS_FAIL(DRAIN_FLOW);
1230         TX_STATUS_FAIL(RFKILL_FLUSH);
1231         TX_STATUS_FAIL(LIFE_EXPIRE);
1232         TX_STATUS_FAIL(DEST_PS);
1233         TX_STATUS_FAIL(HOST_ABORTED);
1234         TX_STATUS_FAIL(BT_RETRY);
1235         TX_STATUS_FAIL(STA_INVALID);
1236         TX_STATUS_FAIL(FRAG_DROPPED);
1237         TX_STATUS_FAIL(TID_DISABLE);
1238         TX_STATUS_FAIL(FIFO_FLUSHED);
1239         TX_STATUS_FAIL(SMALL_CF_POLL);
1240         TX_STATUS_FAIL(FW_DROP);
1241         TX_STATUS_FAIL(STA_COLOR_MISMATCH);
1242         }
1243
1244         return "UNKNOWN";
1245
1246 #undef TX_STATUS_FAIL
1247 #undef TX_STATUS_POSTPONE
1248 }
1249 #endif /* CONFIG_IWLWIFI_DEBUG */
1250
1251 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags,
1252                                enum nl80211_band band,
1253                                struct ieee80211_tx_rate *r)
1254 {
1255         if (rate_n_flags & RATE_HT_MCS_GF_MSK)
1256                 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
1257         switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
1258         case RATE_MCS_CHAN_WIDTH_20:
1259                 break;
1260         case RATE_MCS_CHAN_WIDTH_40:
1261                 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
1262                 break;
1263         case RATE_MCS_CHAN_WIDTH_80:
1264                 r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH;
1265                 break;
1266         case RATE_MCS_CHAN_WIDTH_160:
1267                 r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH;
1268                 break;
1269         }
1270         if (rate_n_flags & RATE_MCS_SGI_MSK)
1271                 r->flags |= IEEE80211_TX_RC_SHORT_GI;
1272         if (rate_n_flags & RATE_MCS_HT_MSK) {
1273                 r->flags |= IEEE80211_TX_RC_MCS;
1274                 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
1275         } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
1276                 ieee80211_rate_set_vht(
1277                         r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK,
1278                         ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
1279                                                 RATE_VHT_MCS_NSS_POS) + 1);
1280                 r->flags |= IEEE80211_TX_RC_VHT_MCS;
1281         } else {
1282                 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
1283                                                              band);
1284         }
1285 }
1286
1287 /**
1288  * translate ucode response to mac80211 tx status control values
1289  */
1290 static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags,
1291                                         struct ieee80211_tx_info *info)
1292 {
1293         struct ieee80211_tx_rate *r = &info->status.rates[0];
1294
1295         info->status.antenna =
1296                 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
1297         iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r);
1298 }
1299
1300 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm,
1301                                             u32 status)
1302 {
1303         struct iwl_fw_dbg_trigger_tlv *trig;
1304         struct iwl_fw_dbg_trigger_tx_status *status_trig;
1305         int i;
1306
1307         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TX_STATUS))
1308                 return;
1309
1310         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TX_STATUS);
1311         status_trig = (void *)trig->data;
1312
1313         if (!iwl_fw_dbg_trigger_check_stop(&mvm->fwrt, NULL, trig))
1314                 return;
1315
1316         for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) {
1317                 /* don't collect on status 0 */
1318                 if (!status_trig->statuses[i].status)
1319                         break;
1320
1321                 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK))
1322                         continue;
1323
1324                 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
1325                                         "Tx status %d was received",
1326                                         status & TX_STATUS_MSK);
1327                 break;
1328         }
1329 }
1330
1331 /**
1332  * iwl_mvm_get_scd_ssn - returns the SSN of the SCD
1333  * @tx_resp: the Tx response from the fw (agg or non-agg)
1334  *
1335  * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since
1336  * it can't know that everything will go well until the end of the AMPDU, it
1337  * can't know in advance the number of MPDUs that will be sent in the current
1338  * batch. This is why it writes the agg Tx response while it fetches the MPDUs.
1339  * Hence, it can't know in advance what the SSN of the SCD will be at the end
1340  * of the batch. This is why the SSN of the SCD is written at the end of the
1341  * whole struct at a variable offset. This function knows how to cope with the
1342  * variable offset and returns the SSN of the SCD.
1343  */
1344 static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm,
1345                                       struct iwl_mvm_tx_resp *tx_resp)
1346 {
1347         return le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) +
1348                             tx_resp->frame_count) & 0xfff;
1349 }
1350
1351 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm,
1352                                      struct iwl_rx_packet *pkt)
1353 {
1354         struct ieee80211_sta *sta;
1355         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1356         int txq_id = SEQ_TO_QUEUE(sequence);
1357         /* struct iwl_mvm_tx_resp_v3 is almost the same */
1358         struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1359         int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1360         int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1361         struct agg_tx_status *agg_status =
1362                 iwl_mvm_get_agg_status(mvm, tx_resp);
1363         u32 status = le16_to_cpu(agg_status->status);
1364         u16 ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp);
1365         struct iwl_mvm_sta *mvmsta;
1366         struct sk_buff_head skbs;
1367         u8 skb_freed = 0;
1368         u8 lq_color;
1369         u16 next_reclaimed, seq_ctl;
1370         bool is_ndp = false;
1371
1372         __skb_queue_head_init(&skbs);
1373
1374         if (iwl_mvm_has_new_tx_api(mvm))
1375                 txq_id = le16_to_cpu(tx_resp->tx_queue);
1376
1377         seq_ctl = le16_to_cpu(tx_resp->seq_ctl);
1378
1379         /* we can free until ssn % q.n_bd not inclusive */
1380         iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs);
1381
1382         while (!skb_queue_empty(&skbs)) {
1383                 struct sk_buff *skb = __skb_dequeue(&skbs);
1384                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1385                 bool flushed = false;
1386
1387                 skb_freed++;
1388
1389                 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1390
1391                 memset(&info->status, 0, sizeof(info->status));
1392
1393                 /* inform mac80211 about what happened with the frame */
1394                 switch (status & TX_STATUS_MSK) {
1395                 case TX_STATUS_SUCCESS:
1396                 case TX_STATUS_DIRECT_DONE:
1397                         info->flags |= IEEE80211_TX_STAT_ACK;
1398                         break;
1399                 case TX_STATUS_FAIL_FIFO_FLUSHED:
1400                 case TX_STATUS_FAIL_DRAIN_FLOW:
1401                         flushed = true;
1402                         break;
1403                 case TX_STATUS_FAIL_DEST_PS:
1404                         /* the FW should have stopped the queue and not
1405                          * return this status
1406                          */
1407                         WARN_ON(1);
1408                         info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
1409                         break;
1410                 default:
1411                         break;
1412                 }
1413
1414                 iwl_mvm_tx_status_check_trigger(mvm, status);
1415
1416                 info->status.rates[0].count = tx_resp->failure_frame + 1;
1417                 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate),
1418                                             info);
1419                 info->status.status_driver_data[1] =
1420                         (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate);
1421
1422                 /* Single frame failure in an AMPDU queue => send BAR */
1423                 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
1424                     !(info->flags & IEEE80211_TX_STAT_ACK) &&
1425                     !(info->flags & IEEE80211_TX_STAT_TX_FILTERED) && !flushed)
1426                         info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1427                 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1428
1429                 /* W/A FW bug: seq_ctl is wrong when the status isn't success */
1430                 if (status != TX_STATUS_SUCCESS) {
1431                         struct ieee80211_hdr *hdr = (void *)skb->data;
1432                         seq_ctl = le16_to_cpu(hdr->seq_ctrl);
1433                 }
1434
1435                 if (unlikely(!seq_ctl)) {
1436                         struct ieee80211_hdr *hdr = (void *)skb->data;
1437
1438                         /*
1439                          * If it is an NDP, we can't update next_reclaim since
1440                          * its sequence control is 0. Note that for that same
1441                          * reason, NDPs are never sent to A-MPDU'able queues
1442                          * so that we can never have more than one freed frame
1443                          * for a single Tx resonse (see WARN_ON below).
1444                          */
1445                         if (ieee80211_is_qos_nullfunc(hdr->frame_control))
1446                                 is_ndp = true;
1447                 }
1448
1449                 /*
1450                  * TODO: this is not accurate if we are freeing more than one
1451                  * packet.
1452                  */
1453                 info->status.tx_time =
1454                         le16_to_cpu(tx_resp->wireless_media_time);
1455                 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1);
1456                 lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info);
1457                 info->status.status_driver_data[0] =
1458                         RS_DRV_DATA_PACK(lq_color, tx_resp->reduced_tpc);
1459
1460                 ieee80211_tx_status(mvm->hw, skb);
1461         }
1462
1463         /* This is an aggregation queue or might become one, so we use
1464          * the ssn since: ssn = wifi seq_num % 256.
1465          * The seq_ctl is the sequence control of the packet to which
1466          * this Tx response relates. But if there is a hole in the
1467          * bitmap of the BA we received, this Tx response may allow to
1468          * reclaim the hole and all the subsequent packets that were
1469          * already acked. In that case, seq_ctl != ssn, and the next
1470          * packet to be reclaimed will be ssn and not seq_ctl. In that
1471          * case, several packets will be reclaimed even if
1472          * frame_count = 1.
1473          *
1474          * The ssn is the index (% 256) of the latest packet that has
1475          * treated (acked / dropped) + 1.
1476          */
1477         next_reclaimed = ssn;
1478
1479         IWL_DEBUG_TX_REPLY(mvm,
1480                            "TXQ %d status %s (0x%08x)\n",
1481                            txq_id, iwl_mvm_get_tx_fail_reason(status), status);
1482
1483         IWL_DEBUG_TX_REPLY(mvm,
1484                            "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
1485                            le32_to_cpu(tx_resp->initial_rate),
1486                            tx_resp->failure_frame, SEQ_TO_INDEX(sequence),
1487                            ssn, next_reclaimed, seq_ctl);
1488
1489         rcu_read_lock();
1490
1491         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1492         /*
1493          * sta can't be NULL otherwise it'd mean that the sta has been freed in
1494          * the firmware while we still have packets for it in the Tx queues.
1495          */
1496         if (WARN_ON_ONCE(!sta))
1497                 goto out;
1498
1499         if (!IS_ERR(sta)) {
1500                 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1501
1502                 iwl_mvm_tx_airtime(mvm, mvmsta,
1503                                    le16_to_cpu(tx_resp->wireless_media_time));
1504
1505                 if (tid != IWL_TID_NON_QOS && tid != IWL_MGMT_TID) {
1506                         struct iwl_mvm_tid_data *tid_data =
1507                                 &mvmsta->tid_data[tid];
1508                         bool send_eosp_ndp = false;
1509
1510                         spin_lock_bh(&mvmsta->lock);
1511
1512                         if (!is_ndp) {
1513                                 tid_data->next_reclaimed = next_reclaimed;
1514                                 IWL_DEBUG_TX_REPLY(mvm,
1515                                                    "Next reclaimed packet:%d\n",
1516                                                    next_reclaimed);
1517                         } else {
1518                                 IWL_DEBUG_TX_REPLY(mvm,
1519                                                    "NDP - don't update next_reclaimed\n");
1520                         }
1521
1522                         iwl_mvm_check_ratid_empty(mvm, sta, tid);
1523
1524                         if (mvmsta->sleep_tx_count) {
1525                                 mvmsta->sleep_tx_count--;
1526                                 if (mvmsta->sleep_tx_count &&
1527                                     !iwl_mvm_tid_queued(mvm, tid_data)) {
1528                                         /*
1529                                          * The number of frames in the queue
1530                                          * dropped to 0 even if we sent less
1531                                          * frames than we thought we had on the
1532                                          * Tx queue.
1533                                          * This means we had holes in the BA
1534                                          * window that we just filled, ask
1535                                          * mac80211 to send EOSP since the
1536                                          * firmware won't know how to do that.
1537                                          * Send NDP and the firmware will send
1538                                          * EOSP notification that will trigger
1539                                          * a call to ieee80211_sta_eosp().
1540                                          */
1541                                         send_eosp_ndp = true;
1542                                 }
1543                         }
1544
1545                         spin_unlock_bh(&mvmsta->lock);
1546                         if (send_eosp_ndp) {
1547                                 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta,
1548                                         IEEE80211_FRAME_RELEASE_UAPSD,
1549                                         1, tid, false, false);
1550                                 mvmsta->sleep_tx_count = 0;
1551                                 ieee80211_send_eosp_nullfunc(sta, tid);
1552                         }
1553                 }
1554
1555                 if (mvmsta->next_status_eosp) {
1556                         mvmsta->next_status_eosp = false;
1557                         ieee80211_sta_eosp(sta);
1558                 }
1559         } else {
1560                 mvmsta = NULL;
1561         }
1562
1563 out:
1564         rcu_read_unlock();
1565 }
1566
1567 #ifdef CONFIG_IWLWIFI_DEBUG
1568 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
1569 static const char *iwl_get_agg_tx_status(u16 status)
1570 {
1571         switch (status & AGG_TX_STATE_STATUS_MSK) {
1572         AGG_TX_STATE_(TRANSMITTED);
1573         AGG_TX_STATE_(UNDERRUN);
1574         AGG_TX_STATE_(BT_PRIO);
1575         AGG_TX_STATE_(FEW_BYTES);
1576         AGG_TX_STATE_(ABORT);
1577         AGG_TX_STATE_(TX_ON_AIR_DROP);
1578         AGG_TX_STATE_(LAST_SENT_TRY_CNT);
1579         AGG_TX_STATE_(LAST_SENT_BT_KILL);
1580         AGG_TX_STATE_(SCD_QUERY);
1581         AGG_TX_STATE_(TEST_BAD_CRC32);
1582         AGG_TX_STATE_(RESPONSE);
1583         AGG_TX_STATE_(DUMP_TX);
1584         AGG_TX_STATE_(DELAY_TX);
1585         }
1586
1587         return "UNKNOWN";
1588 }
1589
1590 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1591                                       struct iwl_rx_packet *pkt)
1592 {
1593         struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1594         struct agg_tx_status *frame_status =
1595                 iwl_mvm_get_agg_status(mvm, tx_resp);
1596         int i;
1597
1598         for (i = 0; i < tx_resp->frame_count; i++) {
1599                 u16 fstatus = le16_to_cpu(frame_status[i].status);
1600
1601                 IWL_DEBUG_TX_REPLY(mvm,
1602                                    "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
1603                                    iwl_get_agg_tx_status(fstatus),
1604                                    fstatus & AGG_TX_STATE_STATUS_MSK,
1605                                    (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >>
1606                                         AGG_TX_STATE_TRY_CNT_POS,
1607                                    le16_to_cpu(frame_status[i].sequence));
1608         }
1609 }
1610 #else
1611 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1612                                       struct iwl_rx_packet *pkt)
1613 {}
1614 #endif /* CONFIG_IWLWIFI_DEBUG */
1615
1616 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm,
1617                                   struct iwl_rx_packet *pkt)
1618 {
1619         struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1620         int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1621         int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1622         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1623         struct iwl_mvm_sta *mvmsta;
1624         int queue = SEQ_TO_QUEUE(sequence);
1625
1626         if (WARN_ON_ONCE(queue < IWL_MVM_DQA_MIN_DATA_QUEUE &&
1627                          (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)))
1628                 return;
1629
1630         if (WARN_ON_ONCE(tid == IWL_TID_NON_QOS))
1631                 return;
1632
1633         iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt);
1634
1635         rcu_read_lock();
1636
1637         mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1638
1639         if (!WARN_ON_ONCE(!mvmsta)) {
1640                 mvmsta->tid_data[tid].rate_n_flags =
1641                         le32_to_cpu(tx_resp->initial_rate);
1642                 mvmsta->tid_data[tid].tx_time =
1643                         le16_to_cpu(tx_resp->wireless_media_time);
1644                 mvmsta->tid_data[tid].lq_color =
1645                         TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info);
1646                 iwl_mvm_tx_airtime(mvm, mvmsta,
1647                                    le16_to_cpu(tx_resp->wireless_media_time));
1648         }
1649
1650         rcu_read_unlock();
1651 }
1652
1653 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1654 {
1655         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1656         struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1657
1658         if (tx_resp->frame_count == 1)
1659                 iwl_mvm_rx_tx_cmd_single(mvm, pkt);
1660         else
1661                 iwl_mvm_rx_tx_cmd_agg(mvm, pkt);
1662 }
1663
1664 static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid,
1665                                int txq, int index,
1666                                struct ieee80211_tx_info *ba_info, u32 rate)
1667 {
1668         struct sk_buff_head reclaimed_skbs;
1669         struct iwl_mvm_tid_data *tid_data;
1670         struct ieee80211_sta *sta;
1671         struct iwl_mvm_sta *mvmsta;
1672         struct sk_buff *skb;
1673         int freed;
1674
1675         if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT ||
1676                       tid > IWL_MAX_TID_COUNT,
1677                       "sta_id %d tid %d", sta_id, tid))
1678                 return;
1679
1680         rcu_read_lock();
1681
1682         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1683
1684         /* Reclaiming frames for a station that has been deleted ? */
1685         if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
1686                 rcu_read_unlock();
1687                 return;
1688         }
1689
1690         mvmsta = iwl_mvm_sta_from_mac80211(sta);
1691         tid_data = &mvmsta->tid_data[tid];
1692
1693         if (tid_data->txq_id != txq) {
1694                 IWL_ERR(mvm,
1695                         "invalid BA notification: Q %d, tid %d\n",
1696                         tid_data->txq_id, tid);
1697                 rcu_read_unlock();
1698                 return;
1699         }
1700
1701         spin_lock_bh(&mvmsta->lock);
1702
1703         __skb_queue_head_init(&reclaimed_skbs);
1704
1705         /*
1706          * Release all TFDs before the SSN, i.e. all TFDs in front of
1707          * block-ack window (we assume that they've been successfully
1708          * transmitted ... if not, it's too late anyway).
1709          */
1710         iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs);
1711
1712         tid_data->next_reclaimed = index;
1713
1714         iwl_mvm_check_ratid_empty(mvm, sta, tid);
1715
1716         freed = 0;
1717
1718         /* pack lq color from tid_data along the reduced txp */
1719         ba_info->status.status_driver_data[0] =
1720                 RS_DRV_DATA_PACK(tid_data->lq_color,
1721                                  ba_info->status.status_driver_data[0]);
1722         ba_info->status.status_driver_data[1] = (void *)(uintptr_t)rate;
1723
1724         skb_queue_walk(&reclaimed_skbs, skb) {
1725                 struct ieee80211_hdr *hdr = (void *)skb->data;
1726                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1727
1728                 if (ieee80211_is_data_qos(hdr->frame_control))
1729                         freed++;
1730                 else
1731                         WARN_ON_ONCE(tid != IWL_MAX_TID_COUNT);
1732
1733                 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1734
1735                 memset(&info->status, 0, sizeof(info->status));
1736                 /* Packet was transmitted successfully, failures come as single
1737                  * frames because before failing a frame the firmware transmits
1738                  * it without aggregation at least once.
1739                  */
1740                 info->flags |= IEEE80211_TX_STAT_ACK;
1741
1742                 /* this is the first skb we deliver in this batch */
1743                 /* put the rate scaling data there */
1744                 if (freed == 1) {
1745                         info->flags |= IEEE80211_TX_STAT_AMPDU;
1746                         memcpy(&info->status, &ba_info->status,
1747                                sizeof(ba_info->status));
1748                         iwl_mvm_hwrate_to_tx_status(rate, info);
1749                 }
1750         }
1751
1752         spin_unlock_bh(&mvmsta->lock);
1753
1754         /* We got a BA notif with 0 acked or scd_ssn didn't progress which is
1755          * possible (i.e. first MPDU in the aggregation wasn't acked)
1756          * Still it's important to update RS about sent vs. acked.
1757          */
1758         if (skb_queue_empty(&reclaimed_skbs)) {
1759                 struct ieee80211_chanctx_conf *chanctx_conf = NULL;
1760
1761                 if (mvmsta->vif)
1762                         chanctx_conf =
1763                                 rcu_dereference(mvmsta->vif->chanctx_conf);
1764
1765                 if (WARN_ON_ONCE(!chanctx_conf))
1766                         goto out;
1767
1768                 ba_info->band = chanctx_conf->def.chan->band;
1769                 iwl_mvm_hwrate_to_tx_status(rate, ba_info);
1770
1771                 if (!iwl_mvm_has_tlc_offload(mvm)) {
1772                         IWL_DEBUG_TX_REPLY(mvm,
1773                                            "No reclaim. Update rs directly\n");
1774                         iwl_mvm_rs_tx_status(mvm, sta, tid, ba_info, false);
1775                 }
1776         }
1777
1778 out:
1779         rcu_read_unlock();
1780
1781         while (!skb_queue_empty(&reclaimed_skbs)) {
1782                 skb = __skb_dequeue(&reclaimed_skbs);
1783                 ieee80211_tx_status(mvm->hw, skb);
1784         }
1785 }
1786
1787 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1788 {
1789         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1790         int sta_id, tid, txq, index;
1791         struct ieee80211_tx_info ba_info = {};
1792         struct iwl_mvm_ba_notif *ba_notif;
1793         struct iwl_mvm_tid_data *tid_data;
1794         struct iwl_mvm_sta *mvmsta;
1795
1796         ba_info.flags = IEEE80211_TX_STAT_AMPDU;
1797
1798         if (iwl_mvm_has_new_tx_api(mvm)) {
1799                 struct iwl_mvm_compressed_ba_notif *ba_res =
1800                         (void *)pkt->data;
1801                 u8 lq_color = TX_RES_RATE_TABLE_COL_GET(ba_res->tlc_rate_info);
1802                 int i;
1803
1804                 sta_id = ba_res->sta_id;
1805                 ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done);
1806                 ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed);
1807                 ba_info.status.tx_time =
1808                         (u16)le32_to_cpu(ba_res->wireless_time);
1809                 ba_info.status.status_driver_data[0] =
1810                         (void *)(uintptr_t)ba_res->reduced_txp;
1811
1812                 if (!le16_to_cpu(ba_res->tfd_cnt))
1813                         goto out;
1814
1815                 rcu_read_lock();
1816
1817                 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1818                 if (!mvmsta)
1819                         goto out_unlock;
1820
1821                 /* Free per TID */
1822                 for (i = 0; i < le16_to_cpu(ba_res->tfd_cnt); i++) {
1823                         struct iwl_mvm_compressed_ba_tfd *ba_tfd =
1824                                 &ba_res->tfd[i];
1825
1826                         tid = ba_tfd->tid;
1827                         if (tid == IWL_MGMT_TID)
1828                                 tid = IWL_MAX_TID_COUNT;
1829
1830                         mvmsta->tid_data[i].lq_color = lq_color;
1831                         iwl_mvm_tx_reclaim(mvm, sta_id, tid,
1832                                            (int)(le16_to_cpu(ba_tfd->q_num)),
1833                                            le16_to_cpu(ba_tfd->tfd_index),
1834                                            &ba_info,
1835                                            le32_to_cpu(ba_res->tx_rate));
1836                 }
1837
1838                 iwl_mvm_tx_airtime(mvm, mvmsta,
1839                                    le32_to_cpu(ba_res->wireless_time));
1840 out_unlock:
1841                 rcu_read_unlock();
1842 out:
1843                 IWL_DEBUG_TX_REPLY(mvm,
1844                                    "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n",
1845                                    sta_id, le32_to_cpu(ba_res->flags),
1846                                    le16_to_cpu(ba_res->txed),
1847                                    le16_to_cpu(ba_res->done));
1848                 return;
1849         }
1850
1851         ba_notif = (void *)pkt->data;
1852         sta_id = ba_notif->sta_id;
1853         tid = ba_notif->tid;
1854         /* "flow" corresponds to Tx queue */
1855         txq = le16_to_cpu(ba_notif->scd_flow);
1856         /* "ssn" is start of block-ack Tx window, corresponds to index
1857          * (in Tx queue's circular buffer) of first TFD/frame in window */
1858         index = le16_to_cpu(ba_notif->scd_ssn);
1859
1860         rcu_read_lock();
1861         mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1862         if (WARN_ON_ONCE(!mvmsta)) {
1863                 rcu_read_unlock();
1864                 return;
1865         }
1866
1867         tid_data = &mvmsta->tid_data[tid];
1868
1869         ba_info.status.ampdu_ack_len = ba_notif->txed_2_done;
1870         ba_info.status.ampdu_len = ba_notif->txed;
1871         ba_info.status.tx_time = tid_data->tx_time;
1872         ba_info.status.status_driver_data[0] =
1873                 (void *)(uintptr_t)ba_notif->reduced_txp;
1874
1875         rcu_read_unlock();
1876
1877         iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info,
1878                            tid_data->rate_n_flags);
1879
1880         IWL_DEBUG_TX_REPLY(mvm,
1881                            "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
1882                            ba_notif->sta_addr, ba_notif->sta_id);
1883
1884         IWL_DEBUG_TX_REPLY(mvm,
1885                            "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
1886                            ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl),
1887                            le64_to_cpu(ba_notif->bitmap), txq, index,
1888                            ba_notif->txed, ba_notif->txed_2_done);
1889
1890         IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n",
1891                            ba_notif->reduced_txp);
1892 }
1893
1894 /*
1895  * Note that there are transports that buffer frames before they reach
1896  * the firmware. This means that after flush_tx_path is called, the
1897  * queue might not be empty. The race-free way to handle this is to:
1898  * 1) set the station as draining
1899  * 2) flush the Tx path
1900  * 3) wait for the transport queues to be empty
1901  */
1902 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, u32 flags)
1903 {
1904         int ret;
1905         struct iwl_tx_path_flush_cmd_v1 flush_cmd = {
1906                 .queues_ctl = cpu_to_le32(tfd_msk),
1907                 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH),
1908         };
1909
1910         WARN_ON(iwl_mvm_has_new_tx_api(mvm));
1911
1912         ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags,
1913                                    sizeof(flush_cmd), &flush_cmd);
1914         if (ret)
1915                 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
1916         return ret;
1917 }
1918
1919 int iwl_mvm_flush_sta_tids(struct iwl_mvm *mvm, u32 sta_id,
1920                            u16 tids, u32 flags)
1921 {
1922         int ret;
1923         struct iwl_tx_path_flush_cmd flush_cmd = {
1924                 .sta_id = cpu_to_le32(sta_id),
1925                 .tid_mask = cpu_to_le16(tids),
1926         };
1927
1928         WARN_ON(!iwl_mvm_has_new_tx_api(mvm));
1929
1930         ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags,
1931                                    sizeof(flush_cmd), &flush_cmd);
1932         if (ret)
1933                 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
1934         return ret;
1935 }
1936
1937 int iwl_mvm_flush_sta(struct iwl_mvm *mvm, void *sta, bool internal, u32 flags)
1938 {
1939         struct iwl_mvm_int_sta *int_sta = sta;
1940         struct iwl_mvm_sta *mvm_sta = sta;
1941
1942         BUILD_BUG_ON(offsetof(struct iwl_mvm_int_sta, sta_id) !=
1943                      offsetof(struct iwl_mvm_sta, sta_id));
1944
1945         if (iwl_mvm_has_new_tx_api(mvm))
1946                 return iwl_mvm_flush_sta_tids(mvm, mvm_sta->sta_id,
1947                                               0xff | BIT(IWL_MGMT_TID), flags);
1948
1949         if (internal)
1950                 return iwl_mvm_flush_tx_path(mvm, int_sta->tfd_queue_msk,
1951                                              flags);
1952
1953         return iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, flags);
1954 }