drivers/net/wireless/intel/iwlwifi/mvm/tx.c

   1 /******************************************************************************
   2  *
   3  * This file is provided under a dual BSD/GPLv2 license.  When using or
   4  * redistributing this file, you may do so under either license.
   5  *
   6  * GPL LICENSE SUMMARY
   7  *
   8  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
   9  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
  10  * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
  11  * Copyright(c) 2018        Intel Corporation
  12  *
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of version 2 of the GNU General Public License as
  15  * published by the Free Software Foundation.
  16  *
  17  * This program is distributed in the hope that it will be useful, but
  18  * WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  20  * General Public License for more details.
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  22  * The full GNU General Public License is included in this distribution
  23  * in the file called COPYING.
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  25  * Contact Information:
  26  *  Intel Linux Wireless <linuxwifi@intel.com>
  27  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  28  *
  29  * BSD LICENSE
  30  *
  31  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  32  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
  33  * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
  34  * Copyright(c) 2018        Intel Corporation
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  38  * modification, are permitted provided that the following conditions
  39  * are met:
  40  *
  41  *  * Redistributions of source code must retain the above copyright
  42  *    notice, this list of conditions and the following disclaimer.
  43  *  * Redistributions in binary form must reproduce the above copyright
  44  *    notice, this list of conditions and the following disclaimer in
  45  *    the documentation and/or other materials provided with the
  46  *    distribution.
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  48  *    contributors may be used to endorse or promote products derived
  49  *    from this software without specific prior written permission.
  50  *
  51  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  52  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  53  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  54  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  55  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  56  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  57  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  58  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  59  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  60  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  61  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  62  *
  63  *****************************************************************************/
  64 #include <linux/ieee80211.h>
  65 #include <linux/etherdevice.h>
  66 #include <linux/tcp.h>
  67 #include <net/ip.h>
  68 #include <net/ipv6.h>
  69
  70 #include "iwl-trans.h"
  71 #include "iwl-eeprom-parse.h"
  72 #include "mvm.h"
  73 #include "sta.h"
  74
  75 static void
  76 iwl_mvm_bar_check_trigger(struct iwl_mvm *mvm, const u8 *addr,
  77                           u16 tid, u16 ssn)
  78 {
  79         struct iwl_fw_dbg_trigger_tlv *trig;
  80         struct iwl_fw_dbg_trigger_ba *ba_trig;
  81
  82         trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, FW_DBG_TRIGGER_BA);
  83         if (!trig)
  84                 return;
  85
  86         ba_trig = (void *)trig->data;
  87
  88         if (!(le16_to_cpu(ba_trig->tx_bar) & BIT(tid)))
  89                 return;
  90
  91         iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
  92                                 "BAR sent to %pM, tid %d, ssn %d",
  93                                 addr, tid, ssn);
  94 }
  95
  96 #define OPT_HDR(type, skb, off) \
  97         (type *)(skb_network_header(skb) + (off))
  98
  99 static u16 iwl_mvm_tx_csum(struct iwl_mvm *mvm, struct sk_buff *skb,
 100                            struct ieee80211_hdr *hdr,
 101                            struct ieee80211_tx_info *info,
 102                            u16 offload_assist)
 103 {
 104 #if IS_ENABLED(CONFIG_INET)
 105         u16 mh_len = ieee80211_hdrlen(hdr->frame_control);
 106         u8 protocol = 0;
 107
 108         /*
 109          * Do not compute checksum if already computed or if transport will
 110          * compute it
 111          */
 112         if (skb->ip_summed != CHECKSUM_PARTIAL || IWL_MVM_SW_TX_CSUM_OFFLOAD)
 113                 goto out;
 114
 115         /* We do not expect to be requested to csum stuff we do not support */
 116         if (WARN_ONCE(!(mvm->hw->netdev_features & IWL_TX_CSUM_NETIF_FLAGS) ||
 117                       (skb->protocol != htons(ETH_P_IP) &&
 118                        skb->protocol != htons(ETH_P_IPV6)),
 119                       "No support for requested checksum\n")) {
 120                 skb_checksum_help(skb);
 121                 goto out;
 122         }
 123
 124         if (skb->protocol == htons(ETH_P_IP)) {
 125                 protocol = ip_hdr(skb)->protocol;
 126         } else {
 127 #if IS_ENABLED(CONFIG_IPV6)
 128                 struct ipv6hdr *ipv6h =
 129                         (struct ipv6hdr *)skb_network_header(skb);
 130                 unsigned int off = sizeof(*ipv6h);
 131
 132                 protocol = ipv6h->nexthdr;
 133                 while (protocol != NEXTHDR_NONE && ipv6_ext_hdr(protocol)) {
 134                         struct ipv6_opt_hdr *hp;
 135
 136                         /* only supported extension headers */
 137                         if (protocol != NEXTHDR_ROUTING &&
 138                             protocol != NEXTHDR_HOP &&
 139                             protocol != NEXTHDR_DEST) {
 140                                 skb_checksum_help(skb);
 141                                 goto out;
 142                         }
 143
 144                         hp = OPT_HDR(struct ipv6_opt_hdr, skb, off);
 145                         protocol = hp->nexthdr;
 146                         off += ipv6_optlen(hp);
 147                 }
 148                 /* if we get here - protocol now should be TCP/UDP */
 149 #endif
 150         }
 151
 152         if (protocol != IPPROTO_TCP && protocol != IPPROTO_UDP) {
 153                 WARN_ON_ONCE(1);
 154                 skb_checksum_help(skb);
 155                 goto out;
 156         }
 157
 158         /* enable L4 csum */
 159         offload_assist |= BIT(TX_CMD_OFFLD_L4_EN);
 160
 161         /*
 162          * Set offset to IP header (snap).
 163          * We don't support tunneling so no need to take care of inner header.
 164          * Size is in words.
 165          */
 166         offload_assist |= (4 << TX_CMD_OFFLD_IP_HDR);
 167
 168         /* Do IPv4 csum for AMSDU only (no IP csum for Ipv6) */
 169         if (skb->protocol == htons(ETH_P_IP) &&
 170             (offload_assist & BIT(TX_CMD_OFFLD_AMSDU))) {
 171                 ip_hdr(skb)->check = 0;
 172                 offload_assist |= BIT(TX_CMD_OFFLD_L3_EN);
 173         }
 174
 175         /* reset UDP/TCP header csum */
 176         if (protocol == IPPROTO_TCP)
 177                 tcp_hdr(skb)->check = 0;
 178         else
 179                 udp_hdr(skb)->check = 0;
 180
 181         /*
 182          * mac header len should include IV, size is in words unless
 183          * the IV is added by the firmware like in WEP.
 184          * In new Tx API, the IV is always added by the firmware.
 185          */
 186         if (!iwl_mvm_has_new_tx_api(mvm) && info->control.hw_key &&
 187             info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP40 &&
 188             info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP104)
 189                 mh_len += info->control.hw_key->iv_len;
 190         mh_len /= 2;
 191         offload_assist |= mh_len << TX_CMD_OFFLD_MH_SIZE;
 192
 193 out:
 194 #endif
 195         return offload_assist;
 196 }
 197
 198 /*
 199  * Sets most of the Tx cmd's fields
 200  */
 201 void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb,
 202                         struct iwl_tx_cmd *tx_cmd,
 203                         struct ieee80211_tx_info *info, u8 sta_id)
 204 {
 205         struct ieee80211_hdr *hdr = (void *)skb->data;
 206         __le16 fc = hdr->frame_control;
 207         u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags);
 208         u32 len = skb->len + FCS_LEN;
 209         u16 offload_assist = 0;
 210         u8 ac;
 211
 212         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
 213                 tx_flags |= TX_CMD_FLG_ACK;
 214         else
 215                 tx_flags &= ~TX_CMD_FLG_ACK;
 216
 217         if (ieee80211_is_probe_resp(fc))
 218                 tx_flags |= TX_CMD_FLG_TSF;
 219
 220         if (ieee80211_has_morefrags(fc))
 221                 tx_flags |= TX_CMD_FLG_MORE_FRAG;
 222
 223         if (ieee80211_is_data_qos(fc)) {
 224                 u8 *qc = ieee80211_get_qos_ctl(hdr);
 225                 tx_cmd->tid_tspec = qc[0] & 0xf;
 226                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
 227                 if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT)
 228                         offload_assist |= BIT(TX_CMD_OFFLD_AMSDU);
 229         } else if (ieee80211_is_back_req(fc)) {
 230                 struct ieee80211_bar *bar = (void *)skb->data;
 231                 u16 control = le16_to_cpu(bar->control);
 232                 u16 ssn = le16_to_cpu(bar->start_seq_num);
 233
 234                 tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR;
 235                 tx_cmd->tid_tspec = (control &
 236                                      IEEE80211_BAR_CTRL_TID_INFO_MASK) >>
 237                         IEEE80211_BAR_CTRL_TID_INFO_SHIFT;
 238                 WARN_ON_ONCE(tx_cmd->tid_tspec >= IWL_MAX_TID_COUNT);
 239                 iwl_mvm_bar_check_trigger(mvm, bar->ra, tx_cmd->tid_tspec,
 240                                           ssn);
 241         } else {
 242                 if (ieee80211_is_data(fc))
 243                         tx_cmd->tid_tspec = IWL_TID_NON_QOS;
 244                 else
 245                         tx_cmd->tid_tspec = IWL_MAX_TID_COUNT;
 246
 247                 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
 248                         tx_flags |= TX_CMD_FLG_SEQ_CTL;
 249                 else
 250                         tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
 251         }
 252
 253         /* Default to 0 (BE) when tid_spec is set to IWL_MAX_TID_COUNT */
 254         if (tx_cmd->tid_tspec < IWL_MAX_TID_COUNT)
 255                 ac = tid_to_mac80211_ac[tx_cmd->tid_tspec];
 256         else
 257                 ac = tid_to_mac80211_ac[0];
 258
 259         tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) <<
 260                         TX_CMD_FLG_BT_PRIO_POS;
 261
 262         if (ieee80211_is_mgmt(fc)) {
 263                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
 264                         tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_ASSOC);
 265                 else if (ieee80211_is_action(fc))
 266                         tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
 267                 else
 268                         tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
 269
 270                 /* The spec allows Action frames in A-MPDU, we don't support
 271                  * it
 272                  */
 273                 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU);
 274         } else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) {
 275                 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
 276         } else {
 277                 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
 278         }
 279
 280         if (ieee80211_is_data(fc) && len > mvm->rts_threshold &&
 281             !is_multicast_ether_addr(ieee80211_get_DA(hdr)))
 282                 tx_flags |= TX_CMD_FLG_PROT_REQUIRE;
 283
 284         if (fw_has_capa(&mvm->fw->ucode_capa,
 285                         IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT) &&
 286             ieee80211_action_contains_tpc(skb))
 287                 tx_flags |= TX_CMD_FLG_WRITE_TX_POWER;
 288
 289         tx_cmd->tx_flags = cpu_to_le32(tx_flags);
 290         /* Total # bytes to be transmitted - PCIe code will adjust for A-MSDU */
 291         tx_cmd->len = cpu_to_le16((u16)skb->len);
 292         tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
 293         tx_cmd->sta_id = sta_id;
 294
 295         /* padding is inserted later in transport */
 296         if (ieee80211_hdrlen(fc) % 4 &&
 297             !(offload_assist & BIT(TX_CMD_OFFLD_AMSDU)))
 298                 offload_assist |= BIT(TX_CMD_OFFLD_PAD);
 299
 300         tx_cmd->offload_assist |=
 301                 cpu_to_le16(iwl_mvm_tx_csum(mvm, skb, hdr, info,
 302                                             offload_assist));
 303 }
 304
 305 static u32 iwl_mvm_get_tx_ant(struct iwl_mvm *mvm,
 306                               struct ieee80211_tx_info *info,
 307                               struct ieee80211_sta *sta, __le16 fc)
 308 {
 309         if (info->band == NL80211_BAND_2GHZ &&
 310             !iwl_mvm_bt_coex_is_shared_ant_avail(mvm))
 311                 return mvm->cfg->non_shared_ant << RATE_MCS_ANT_POS;
 312
 313         if (sta && ieee80211_is_data(fc)) {
 314                 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 315
 316                 return BIT(mvmsta->tx_ant) << RATE_MCS_ANT_POS;
 317         }
 318
 319         return BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS;
 320 }
 321
 322 static u32 iwl_mvm_get_tx_rate(struct iwl_mvm *mvm,
 323                                struct ieee80211_tx_info *info,
 324                                struct ieee80211_sta *sta)
 325 {
 326         int rate_idx;
 327         u8 rate_plcp;
 328         u32 rate_flags = 0;
 329
 330         /* HT rate doesn't make sense for a non data frame */
 331         WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS,
 332                   "Got an HT rate (flags:0x%x/mcs:%d) for a non data frame\n",
 333                   info->control.rates[0].flags,
 334                   info->control.rates[0].idx);
 335
 336         rate_idx = info->control.rates[0].idx;
 337         /* if the rate isn't a well known legacy rate, take the lowest one */
 338         if (rate_idx < 0 || rate_idx >= IWL_RATE_COUNT_LEGACY)
 339                 rate_idx = rate_lowest_index(
 340                                 &mvm->nvm_data->bands[info->band], sta);
 341
 342         /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
 343         if (info->band == NL80211_BAND_5GHZ)
 344                 rate_idx += IWL_FIRST_OFDM_RATE;
 345
 346         /* For 2.4 GHZ band, check that there is no need to remap */
 347         BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
 348
 349         /* Get PLCP rate for tx_cmd->rate_n_flags */
 350         rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(rate_idx);
 351
 352         /* Set CCK flag as needed */
 353         if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
 354                 rate_flags |= RATE_MCS_CCK_MSK;
 355
 356         return (u32)rate_plcp | rate_flags;
 357 }
 358
 359 static u32 iwl_mvm_get_tx_rate_n_flags(struct iwl_mvm *mvm,
 360                                        struct ieee80211_tx_info *info,
 361                                        struct ieee80211_sta *sta, __le16 fc)
 362 {
 363         return iwl_mvm_get_tx_rate(mvm, info, sta) |
 364                 iwl_mvm_get_tx_ant(mvm, info, sta, fc);
 365 }
 366
 367 /*
 368  * Sets the fields in the Tx cmd that are rate related
 369  */
 370 void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd,
 371                             struct ieee80211_tx_info *info,
 372                             struct ieee80211_sta *sta, __le16 fc)
 373 {
 374         /* Set retry limit on RTS packets */
 375         tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT;
 376
 377         /* Set retry limit on DATA packets and Probe Responses*/
 378         if (ieee80211_is_probe_resp(fc)) {
 379                 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT;
 380                 tx_cmd->rts_retry_limit =
 381                         min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit);
 382         } else if (ieee80211_is_back_req(fc)) {
 383                 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT;
 384         } else {
 385                 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY;
 386         }
 387
 388         /*
 389          * for data packets, rate info comes from the table inside the fw. This
 390          * table is controlled by LINK_QUALITY commands
 391          */
 392
 393         if (ieee80211_is_data(fc) && sta) {
 394                 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 395
 396                 if (mvmsta->sta_state >= IEEE80211_STA_AUTHORIZED) {
 397                         tx_cmd->initial_rate_index = 0;
 398                         tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE);
 399                         return;
 400                 }
 401         } else if (ieee80211_is_back_req(fc)) {
 402                 tx_cmd->tx_flags |=
 403                         cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR);
 404         }
 405
 406         /* Set the rate in the TX cmd */
 407         tx_cmd->rate_n_flags =
 408                 cpu_to_le32(iwl_mvm_get_tx_rate_n_flags(mvm, info, sta, fc));
 409 }
 410
 411 static inline void iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info *info,
 412                                          u8 *crypto_hdr)
 413 {
 414         struct ieee80211_key_conf *keyconf = info->control.hw_key;
 415         u64 pn;
 416
 417         pn = atomic64_inc_return(&keyconf->tx_pn);
 418         crypto_hdr[0] = pn;
 419         crypto_hdr[2] = 0;
 420         crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6);
 421         crypto_hdr[1] = pn >> 8;
 422         crypto_hdr[4] = pn >> 16;
 423         crypto_hdr[5] = pn >> 24;
 424         crypto_hdr[6] = pn >> 32;
 425         crypto_hdr[7] = pn >> 40;
 426 }
 427
 428 /*
 429  * Sets the fields in the Tx cmd that are crypto related
 430  */
 431 static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm,
 432                                       struct ieee80211_tx_info *info,
 433                                       struct iwl_tx_cmd *tx_cmd,
 434                                       struct sk_buff *skb_frag,
 435                                       int hdrlen)
 436 {
 437         struct ieee80211_key_conf *keyconf = info->control.hw_key;
 438         u8 *crypto_hdr = skb_frag->data + hdrlen;
 439         enum iwl_tx_cmd_sec_ctrl type = TX_CMD_SEC_CCM;
 440         u64 pn;
 441
 442         switch (keyconf->cipher) {
 443         case WLAN_CIPHER_SUITE_CCMP:
 444                 iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd);
 445                 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr);
 446                 break;
 447
 448         case WLAN_CIPHER_SUITE_TKIP:
 449                 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
 450                 pn = atomic64_inc_return(&keyconf->tx_pn);
 451                 ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn);
 452                 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
 453                 break;
 454
 455         case WLAN_CIPHER_SUITE_WEP104:
 456                 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
 457                 /* fall through */
 458         case WLAN_CIPHER_SUITE_WEP40:
 459                 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP |
 460                         ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) &
 461                           TX_CMD_SEC_WEP_KEY_IDX_MSK);
 462
 463                 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
 464                 break;
 465         case WLAN_CIPHER_SUITE_GCMP:
 466         case WLAN_CIPHER_SUITE_GCMP_256:
 467                 type = TX_CMD_SEC_GCMP;
 468                 /* Fall through */
 469         case WLAN_CIPHER_SUITE_CCMP_256:
 470                 /* TODO: Taking the key from the table might introduce a race
 471                  * when PTK rekeying is done, having an old packets with a PN
 472                  * based on the old key but the message encrypted with a new
 473                  * one.
 474                  * Need to handle this.
 475                  */
 476                 tx_cmd->sec_ctl |= type | TX_CMD_SEC_KEY_FROM_TABLE;
 477                 tx_cmd->key[0] = keyconf->hw_key_idx;
 478                 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr);
 479                 break;
 480         default:
 481                 tx_cmd->sec_ctl |= TX_CMD_SEC_EXT;
 482         }
 483 }
 484
 485 /*
 486  * Allocates and sets the Tx cmd the driver data pointers in the skb
 487  */
 488 static struct iwl_device_cmd *
 489 iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb,
 490                       struct ieee80211_tx_info *info, int hdrlen,
 491                       struct ieee80211_sta *sta, u8 sta_id)
 492 {
 493         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 494         struct iwl_device_cmd *dev_cmd;
 495         struct iwl_tx_cmd *tx_cmd;
 496
 497         dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans);
 498
 499         if (unlikely(!dev_cmd))
 500                 return NULL;
 501
 502         /* Make sure we zero enough of dev_cmd */
 503         BUILD_BUG_ON(sizeof(struct iwl_tx_cmd_gen2) > sizeof(*tx_cmd));
 504         BUILD_BUG_ON(sizeof(struct iwl_tx_cmd_gen3) > sizeof(*tx_cmd));
 505
 506         memset(dev_cmd, 0, sizeof(dev_cmd->hdr) + sizeof(*tx_cmd));
 507         dev_cmd->hdr.cmd = TX_CMD;
 508
 509         if (iwl_mvm_has_new_tx_api(mvm)) {
 510                 u16 offload_assist = 0;
 511                 u32 rate_n_flags = 0;
 512                 u16 flags = 0;
 513                 struct iwl_mvm_sta *mvmsta = sta ?
 514                         iwl_mvm_sta_from_mac80211(sta) : NULL;
 515
 516                 if (ieee80211_is_data_qos(hdr->frame_control)) {
 517                         u8 *qc = ieee80211_get_qos_ctl(hdr);
 518
 519                         if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT)
 520                                 offload_assist |= BIT(TX_CMD_OFFLD_AMSDU);
 521                 }
 522
 523                 offload_assist = iwl_mvm_tx_csum(mvm, skb, hdr, info,
 524                                                  offload_assist);
 525
 526                 /* padding is inserted later in transport */
 527                 if (ieee80211_hdrlen(hdr->frame_control) % 4 &&
 528                     !(offload_assist & BIT(TX_CMD_OFFLD_AMSDU)))
 529                         offload_assist |= BIT(TX_CMD_OFFLD_PAD);
 530
 531                 if (!info->control.hw_key)
 532                         flags |= IWL_TX_FLAGS_ENCRYPT_DIS;
 533
 534                 /*
 535                  * For data packets rate info comes from the fw. Only
 536                  * set rate/antenna during connection establishment.
 537                  */
 538                 if (sta && (!ieee80211_is_data(hdr->frame_control) ||
 539                             mvmsta->sta_state < IEEE80211_STA_AUTHORIZED)) {
 540                         flags |= IWL_TX_FLAGS_CMD_RATE;
 541                         rate_n_flags =
 542                                 iwl_mvm_get_tx_rate_n_flags(mvm, info, sta,
 543                                                             hdr->frame_control);
 544                 }
 545
 546                 if (mvm->trans->cfg->device_family >=
 547                     IWL_DEVICE_FAMILY_22560) {
 548                         struct iwl_tx_cmd_gen3 *cmd = (void *)dev_cmd->payload;
 549
 550                         cmd->offload_assist |= cpu_to_le32(offload_assist);
 551
 552                         /* Total # bytes to be transmitted */
 553                         cmd->len = cpu_to_le16((u16)skb->len);
 554
 555                         /* Copy MAC header from skb into command buffer */
 556                         memcpy(cmd->hdr, hdr, hdrlen);
 557
 558                         cmd->flags = cpu_to_le16(flags);
 559                         cmd->rate_n_flags = cpu_to_le32(rate_n_flags);
 560                 } else {
 561                         struct iwl_tx_cmd_gen2 *cmd = (void *)dev_cmd->payload;
 562
 563                         cmd->offload_assist |= cpu_to_le16(offload_assist);
 564
 565                         /* Total # bytes to be transmitted */
 566                         cmd->len = cpu_to_le16((u16)skb->len);
 567
 568                         /* Copy MAC header from skb into command buffer */
 569                         memcpy(cmd->hdr, hdr, hdrlen);
 570
 571                         cmd->flags = cpu_to_le32(flags);
 572                         cmd->rate_n_flags = cpu_to_le32(rate_n_flags);
 573                 }
 574                 goto out;
 575         }
 576
 577         tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
 578
 579         if (info->control.hw_key)
 580                 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen);
 581
 582         iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id);
 583
 584         iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control);
 585
 586         /* Copy MAC header from skb into command buffer */
 587         memcpy(tx_cmd->hdr, hdr, hdrlen);
 588
 589 out:
 590         return dev_cmd;
 591 }
 592
 593 static void iwl_mvm_skb_prepare_status(struct sk_buff *skb,
 594                                        struct iwl_device_cmd *cmd)
 595 {
 596         struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb);
 597
 598         memset(&skb_info->status, 0, sizeof(skb_info->status));
 599         memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data));
 600
 601         skb_info->driver_data[1] = cmd;
 602 }
 603
 604 static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm,
 605                                       struct ieee80211_tx_info *info,
 606                                       struct ieee80211_hdr *hdr)
 607 {
 608         struct iwl_mvm_vif *mvmvif =
 609                 iwl_mvm_vif_from_mac80211(info->control.vif);
 610         __le16 fc = hdr->frame_control;
 611
 612         switch (info->control.vif->type) {
 613         case NL80211_IFTYPE_AP:
 614         case NL80211_IFTYPE_ADHOC:
 615                 /*
 616                  * Non-bufferable frames use the broadcast station, thus they
 617                  * use the probe queue.
 618                  * Also take care of the case where we send a deauth to a
 619                  * station that we don't have, or similarly an association
 620                  * response (with non-success status) for a station we can't
 621                  * accept.
 622                  * Also, disassociate frames might happen, particular with
 623                  * reason 7 ("Class 3 frame received from nonassociated STA").
 624                  */
 625                 if (ieee80211_is_mgmt(fc) &&
 626                     (!ieee80211_is_bufferable_mmpdu(fc) ||
 627                      ieee80211_is_deauth(fc) || ieee80211_is_disassoc(fc)))
 628                         return mvm->probe_queue;
 629
 630                 if (!ieee80211_has_order(fc) && !ieee80211_is_probe_req(fc) &&
 631                     is_multicast_ether_addr(hdr->addr1))
 632                         return mvmvif->cab_queue;
 633
 634                 WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC,
 635                           "fc=0x%02x", le16_to_cpu(fc));
 636                 return mvm->probe_queue;
 637         case NL80211_IFTYPE_P2P_DEVICE:
 638                 if (ieee80211_is_mgmt(fc))
 639                         return mvm->p2p_dev_queue;
 640
 641                 WARN_ON_ONCE(1);
 642                 return mvm->p2p_dev_queue;
 643         default:
 644                 WARN_ONCE(1, "Not a ctrl vif, no available queue\n");
 645                 return -1;
 646         }
 647 }
 648
 649 static void iwl_mvm_probe_resp_set_noa(struct iwl_mvm *mvm,
 650                                        struct sk_buff *skb)
 651 {
 652         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 653         struct iwl_mvm_vif *mvmvif =
 654                 iwl_mvm_vif_from_mac80211(info->control.vif);
 655         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
 656         int base_len = (u8 *)mgmt->u.probe_resp.variable - (u8 *)mgmt;
 657         struct iwl_probe_resp_data *resp_data;
 658         u8 *ie, *pos;
 659         u8 match[] = {
 660                 (WLAN_OUI_WFA >> 16) & 0xff,
 661                 (WLAN_OUI_WFA >> 8) & 0xff,
 662                 WLAN_OUI_WFA & 0xff,
 663                 WLAN_OUI_TYPE_WFA_P2P,
 664         };
 665
 666         rcu_read_lock();
 667
 668         resp_data = rcu_dereference(mvmvif->probe_resp_data);
 669         if (!resp_data)
 670                 goto out;
 671
 672         if (!resp_data->notif.noa_active)
 673                 goto out;
 674
 675         ie = (u8 *)cfg80211_find_ie_match(WLAN_EID_VENDOR_SPECIFIC,
 676                                           mgmt->u.probe_resp.variable,
 677                                           skb->len - base_len,
 678                                           match, 4, 2);
 679         if (!ie) {
 680                 IWL_DEBUG_TX(mvm, "probe resp doesn't have P2P IE\n");
 681                 goto out;
 682         }
 683
 684         if (skb_tailroom(skb) < resp_data->noa_len) {
 685                 if (pskb_expand_head(skb, 0, resp_data->noa_len, GFP_ATOMIC)) {
 686                         IWL_ERR(mvm,
 687                                 "Failed to reallocate probe resp\n");
 688                         goto out;
 689                 }
 690         }
 691
 692         pos = skb_put(skb, resp_data->noa_len);
 693
 694         *pos++ = WLAN_EID_VENDOR_SPECIFIC;
 695         /* Set length of IE body (not including ID and length itself) */
 696         *pos++ = resp_data->noa_len - 2;
 697         *pos++ = (WLAN_OUI_WFA >> 16) & 0xff;
 698         *pos++ = (WLAN_OUI_WFA >> 8) & 0xff;
 699         *pos++ = WLAN_OUI_WFA & 0xff;
 700         *pos++ = WLAN_OUI_TYPE_WFA_P2P;
 701
 702         memcpy(pos, &resp_data->notif.noa_attr,
 703                resp_data->noa_len - sizeof(struct ieee80211_vendor_ie));
 704
 705 out:
 706         rcu_read_unlock();
 707 }
 708
 709 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb)
 710 {
 711         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 712         struct ieee80211_tx_info info;
 713         struct iwl_device_cmd *dev_cmd;
 714         u8 sta_id;
 715         int hdrlen = ieee80211_hdrlen(hdr->frame_control);
 716         __le16 fc = hdr->frame_control;
 717         bool offchannel = IEEE80211_SKB_CB(skb)->flags &
 718                 IEEE80211_TX_CTL_TX_OFFCHAN;
 719         int queue = -1;
 720
 721         memcpy(&info, skb->cb, sizeof(info));
 722
 723         if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU))
 724                 return -1;
 725
 726         if (info.control.vif) {
 727                 struct iwl_mvm_vif *mvmvif =
 728                         iwl_mvm_vif_from_mac80211(info.control.vif);
 729
 730                 if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE ||
 731                     info.control.vif->type == NL80211_IFTYPE_AP ||
 732                     info.control.vif->type == NL80211_IFTYPE_ADHOC) {
 733                         if (!ieee80211_is_data(hdr->frame_control))
 734                                 sta_id = mvmvif->bcast_sta.sta_id;
 735                         else
 736                                 sta_id = mvmvif->mcast_sta.sta_id;
 737
 738                         queue = iwl_mvm_get_ctrl_vif_queue(mvm, &info, hdr);
 739                 } else if (info.control.vif->type == NL80211_IFTYPE_MONITOR) {
 740                         queue = mvm->snif_queue;
 741                         sta_id = mvm->snif_sta.sta_id;
 742                 } else if (info.control.vif->type == NL80211_IFTYPE_STATION &&
 743                            offchannel) {
 744                         /*
 745                          * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets
 746                          * that can be used in 2 different types of vifs, P2P &
 747                          * STATION.
 748                          * P2P uses the offchannel queue.
 749                          * STATION (HS2.0) uses the auxiliary context of the FW,
 750                          * and hence needs to be sent on the aux queue.
 751                          */
 752                         sta_id = mvm->aux_sta.sta_id;
 753                         queue = mvm->aux_queue;
 754                 }
 755         }
 756
 757         if (queue < 0) {
 758                 IWL_ERR(mvm, "No queue was found. Dropping TX\n");
 759                 return -1;
 760         }
 761
 762         if (unlikely(ieee80211_is_probe_resp(fc)))
 763                 iwl_mvm_probe_resp_set_noa(mvm, skb);
 764
 765         IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue);
 766
 767         dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id);
 768         if (!dev_cmd)
 769                 return -1;
 770
 771         /* From now on, we cannot access info->control */
 772         iwl_mvm_skb_prepare_status(skb, dev_cmd);
 773
 774         if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) {
 775                 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
 776                 return -1;
 777         }
 778
 779         return 0;
 780 }
 781
 782 #ifdef CONFIG_INET
 783
 784 static int
 785 iwl_mvm_tx_tso_segment(struct sk_buff *skb, unsigned int num_subframes,
 786                        netdev_features_t netdev_flags,
 787                        struct sk_buff_head *mpdus_skb)
 788 {
 789         struct sk_buff *tmp, *next;
 790         struct ieee80211_hdr *hdr = (void *)skb->data;
 791         char cb[sizeof(skb->cb)];
 792         u16 i = 0;
 793         unsigned int tcp_payload_len;
 794         unsigned int mss = skb_shinfo(skb)->gso_size;
 795         bool ipv4 = (skb->protocol == htons(ETH_P_IP));
 796         u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0;
 797
 798         skb_shinfo(skb)->gso_size = num_subframes * mss;
 799         memcpy(cb, skb->cb, sizeof(cb));
 800
 801         next = skb_gso_segment(skb, netdev_flags);
 802         skb_shinfo(skb)->gso_size = mss;
 803         if (WARN_ON_ONCE(IS_ERR(next)))
 804                 return -EINVAL;
 805         else if (next)
 806                 consume_skb(skb);
 807
 808         while (next) {
 809                 tmp = next;
 810                 next = tmp->next;
 811
 812                 memcpy(tmp->cb, cb, sizeof(tmp->cb));
 813                 /*
 814                  * Compute the length of all the data added for the A-MSDU.
 815                  * This will be used to compute the length to write in the TX
 816                  * command. We have: SNAP + IP + TCP for n -1 subframes and
 817                  * ETH header for n subframes.
 818                  */
 819                 tcp_payload_len = skb_tail_pointer(tmp) -
 820                         skb_transport_header(tmp) -
 821                         tcp_hdrlen(tmp) + tmp->data_len;
 822
 823                 if (ipv4)
 824                         ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes);
 825
 826                 if (tcp_payload_len > mss) {
 827                         skb_shinfo(tmp)->gso_size = mss;
 828                 } else {
 829                         if (ieee80211_is_data_qos(hdr->frame_control)) {
 830                                 u8 *qc;
 831
 832                                 if (ipv4)
 833                                         ip_send_check(ip_hdr(tmp));
 834
 835                                 qc = ieee80211_get_qos_ctl((void *)tmp->data);
 836                                 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
 837                         }
 838                         skb_shinfo(tmp)->gso_size = 0;
 839                 }
 840
 841                 tmp->prev = NULL;
 842                 tmp->next = NULL;
 843
 844                 __skb_queue_tail(mpdus_skb, tmp);
 845                 i++;
 846         }
 847
 848         return 0;
 849 }
 850
 851 static unsigned int iwl_mvm_max_amsdu_size(struct iwl_mvm *mvm,
 852                                            struct ieee80211_sta *sta,
 853                                            unsigned int tid)
 854 {
 855         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 856         enum nl80211_band band = mvmsta->vif->bss_conf.chandef.chan->band;
 857         u8 ac = tid_to_mac80211_ac[tid];
 858         unsigned int txf;
 859         int lmac = IWL_LMAC_24G_INDEX;
 860
 861         if (iwl_mvm_is_cdb_supported(mvm) &&
 862             band == NL80211_BAND_5GHZ)
 863                 lmac = IWL_LMAC_5G_INDEX;
 864
 865         /* For HE redirect to trigger based fifos */
 866         if (sta->he_cap.has_he && !WARN_ON(!iwl_mvm_has_new_tx_api(mvm)))
 867                 ac += 4;
 868
 869         txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac);
 870
 871         /*
 872          * Don't send an AMSDU that will be longer than the TXF.
 873          * Add a security margin of 256 for the TX command + headers.
 874          * We also want to have the start of the next packet inside the
 875          * fifo to be able to send bursts.
 876          */
 877         return min_t(unsigned int, mvmsta->max_amsdu_len,
 878                      mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256);
 879 }
 880
 881 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
 882                           struct ieee80211_tx_info *info,
 883                           struct ieee80211_sta *sta,
 884                           struct sk_buff_head *mpdus_skb)
 885 {
 886         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 887         struct ieee80211_hdr *hdr = (void *)skb->data;
 888         unsigned int mss = skb_shinfo(skb)->gso_size;
 889         unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len;
 890         u16 snap_ip_tcp, pad;
 891         unsigned int dbg_max_amsdu_len;
 892         netdev_features_t netdev_flags = NETIF_F_CSUM_MASK | NETIF_F_SG;
 893         u8 tid;
 894
 895         snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) +
 896                 tcp_hdrlen(skb);
 897
 898         dbg_max_amsdu_len = READ_ONCE(mvm->max_amsdu_len);
 899
 900         if (!mvmsta->max_amsdu_len ||
 901             !ieee80211_is_data_qos(hdr->frame_control) ||
 902             (!mvmsta->amsdu_enabled && !dbg_max_amsdu_len))
 903                 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
 904
 905         /*
 906          * Do not build AMSDU for IPv6 with extension headers.
 907          * ask stack to segment and checkum the generated MPDUs for us.
 908          */
 909         if (skb->protocol == htons(ETH_P_IPV6) &&
 910             ((struct ipv6hdr *)skb_network_header(skb))->nexthdr !=
 911             IPPROTO_TCP) {
 912                 netdev_flags &= ~NETIF_F_CSUM_MASK;
 913                 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
 914         }
 915
 916         tid = ieee80211_get_tid(hdr);
 917         if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
 918                 return -EINVAL;
 919
 920         /*
 921          * No need to lock amsdu_in_ampdu_allowed since it can't be modified
 922          * during an BA session.
 923          */
 924         if (info->flags & IEEE80211_TX_CTL_AMPDU &&
 925             !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed)
 926                 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
 927
 928         if (iwl_mvm_vif_low_latency(iwl_mvm_vif_from_mac80211(mvmsta->vif)) ||
 929             !(mvmsta->amsdu_enabled & BIT(tid)))
 930                 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
 931
 932         max_amsdu_len = iwl_mvm_max_amsdu_size(mvm, sta, tid);
 933
 934         if (unlikely(dbg_max_amsdu_len))
 935                 max_amsdu_len = min_t(unsigned int, max_amsdu_len,
 936                                       dbg_max_amsdu_len);
 937
 938         /*
 939          * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not
 940          * supported. This is a spec requirement (IEEE 802.11-2015
 941          * section 8.7.3 NOTE 3).
 942          */
 943         if (info->flags & IEEE80211_TX_CTL_AMPDU &&
 944             !sta->vht_cap.vht_supported)
 945                 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095);
 946
 947         /* Sub frame header + SNAP + IP header + TCP header + MSS */
 948         subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss;
 949         pad = (4 - subf_len) & 0x3;
 950
 951         /*
 952          * If we have N subframes in the A-MSDU, then the A-MSDU's size is
 953          * N * subf_len + (N - 1) * pad.
 954          */
 955         num_subframes = (max_amsdu_len + pad) / (subf_len + pad);
 956
 957         if (sta->max_amsdu_subframes &&
 958             num_subframes > sta->max_amsdu_subframes)
 959                 num_subframes = sta->max_amsdu_subframes;
 960
 961         tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
 962                 tcp_hdrlen(skb) + skb->data_len;
 963
 964         /*
 965          * Make sure we have enough TBs for the A-MSDU:
 966          *      2 for each subframe
 967          *      1 more for each fragment
 968          *      1 more for the potential data in the header
 969          */
 970         if ((num_subframes * 2 + skb_shinfo(skb)->nr_frags + 1) >
 971             mvm->trans->max_skb_frags)
 972                 num_subframes = 1;
 973
 974         if (num_subframes > 1)
 975                 *ieee80211_get_qos_ctl(hdr) |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
 976
 977         /* This skb fits in one single A-MSDU */
 978         if (num_subframes * mss >= tcp_payload_len) {
 979                 __skb_queue_tail(mpdus_skb, skb);
 980                 return 0;
 981         }
 982
 983         /*
 984          * Trick the segmentation function to make it
 985          * create SKBs that can fit into one A-MSDU.
 986          */
 987         return iwl_mvm_tx_tso_segment(skb, num_subframes, netdev_flags,
 988                                       mpdus_skb);
 989 }
 990 #else /* CONFIG_INET */
 991 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
 992                           struct ieee80211_tx_info *info,
 993                           struct ieee80211_sta *sta,
 994                           struct sk_buff_head *mpdus_skb)
 995 {
 996         /* Impossible to get TSO with CONFIG_INET */
 997         WARN_ON(1);
 998
 999         return -1;
1000 }
1001 #endif
1002
1003 /* Check if there are any timed-out TIDs on a given shared TXQ */
1004 static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id)
1005 {
1006         unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap;
1007         unsigned long now = jiffies;
1008         int tid;
1009
1010         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1011                 return false;
1012
1013         for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) {
1014                 if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] +
1015                                 IWL_MVM_DQA_QUEUE_TIMEOUT, now))
1016                         return true;
1017         }
1018
1019         return false;
1020 }
1021
1022 static void iwl_mvm_tx_airtime(struct iwl_mvm *mvm,
1023                                struct iwl_mvm_sta *mvmsta,
1024                                int airtime)
1025 {
1026         int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
1027         struct iwl_mvm_tcm_mac *mdata = &mvm->tcm.data[mac];
1028
1029         if (mvm->tcm.paused)
1030                 return;
1031
1032         if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD))
1033                 schedule_delayed_work(&mvm->tcm.work, 0);
1034
1035         mdata->tx.airtime += airtime;
1036 }
1037
1038 static void iwl_mvm_tx_pkt_queued(struct iwl_mvm *mvm,
1039                                   struct iwl_mvm_sta *mvmsta, int tid)
1040 {
1041         u32 ac = tid_to_mac80211_ac[tid];
1042         int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
1043         struct iwl_mvm_tcm_mac *mdata = &mvm->tcm.data[mac];
1044
1045         mdata->tx.pkts[ac]++;
1046 }
1047
1048 /*
1049  * Sets the fields in the Tx cmd that are crypto related
1050  */
1051 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb,
1052                            struct ieee80211_tx_info *info,
1053                            struct ieee80211_sta *sta)
1054 {
1055         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1056         struct iwl_mvm_sta *mvmsta;
1057         struct iwl_device_cmd *dev_cmd;
1058         __le16 fc;
1059         u16 seq_number = 0;
1060         u8 tid = IWL_MAX_TID_COUNT;
1061         u16 txq_id;
1062         bool is_ampdu = false;
1063         int hdrlen;
1064
1065         mvmsta = iwl_mvm_sta_from_mac80211(sta);
1066         fc = hdr->frame_control;
1067         hdrlen = ieee80211_hdrlen(fc);
1068
1069         if (WARN_ON_ONCE(!mvmsta))
1070                 return -1;
1071
1072         if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA))
1073                 return -1;
1074
1075         if (unlikely(ieee80211_is_probe_resp(fc)))
1076                 iwl_mvm_probe_resp_set_noa(mvm, skb);
1077
1078         dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen,
1079                                         sta, mvmsta->sta_id);
1080         if (!dev_cmd)
1081                 goto drop;
1082
1083         /*
1084          * we handle that entirely ourselves -- for uAPSD the firmware
1085          * will always send a notification, and for PS-Poll responses
1086          * we'll notify mac80211 when getting frame status
1087          */
1088         info->flags &= ~IEEE80211_TX_STATUS_EOSP;
1089
1090         spin_lock(&mvmsta->lock);
1091
1092         /* nullfunc frames should go to the MGMT queue regardless of QOS,
1093          * the condition of !ieee80211_is_qos_nullfunc(fc) keeps the default
1094          * assignment of MGMT TID
1095          */
1096         if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
1097                 tid = ieee80211_get_tid(hdr);
1098                 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
1099                         goto drop_unlock_sta;
1100
1101                 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU;
1102                 if (WARN_ON_ONCE(is_ampdu &&
1103                                  mvmsta->tid_data[tid].state != IWL_AGG_ON))
1104                         goto drop_unlock_sta;
1105
1106                 seq_number = mvmsta->tid_data[tid].seq_number;
1107                 seq_number &= IEEE80211_SCTL_SEQ;
1108
1109                 if (!iwl_mvm_has_new_tx_api(mvm)) {
1110                         struct iwl_tx_cmd *tx_cmd = (void *)dev_cmd->payload;
1111
1112                         hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
1113                         hdr->seq_ctrl |= cpu_to_le16(seq_number);
1114                         /* update the tx_cmd hdr as it was already copied */
1115                         tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl;
1116                 }
1117         } else if (ieee80211_is_data(fc) && !ieee80211_is_data_qos(fc)) {
1118                 tid = IWL_TID_NON_QOS;
1119         }
1120
1121         txq_id = mvmsta->tid_data[tid].txq_id;
1122
1123         WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
1124
1125         if (WARN_ON_ONCE(txq_id == IWL_MVM_INVALID_QUEUE)) {
1126                 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1127                 spin_unlock(&mvmsta->lock);
1128                 return 0;
1129         }
1130
1131         if (!iwl_mvm_has_new_tx_api(mvm)) {
1132                 /* Keep track of the time of the last frame for this RA/TID */
1133                 mvm->queue_info[txq_id].last_frame_time[tid] = jiffies;
1134
1135                 /*
1136                  * If we have timed-out TIDs - schedule the worker that will
1137                  * reconfig the queues and update them
1138                  *
1139                  * Note that the no lock is taken here in order to not serialize
1140                  * the TX flow. This isn't dangerous because scheduling
1141                  * mvm->add_stream_wk can't ruin the state, and if we DON'T
1142                  * schedule it due to some race condition then next TX we get
1143                  * here we will.
1144                  */
1145                 if (unlikely(mvm->queue_info[txq_id].status ==
1146                              IWL_MVM_QUEUE_SHARED &&
1147                              iwl_mvm_txq_should_update(mvm, txq_id)))
1148                         schedule_work(&mvm->add_stream_wk);
1149         }
1150
1151         IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id,
1152                      tid, txq_id, IEEE80211_SEQ_TO_SN(seq_number));
1153
1154         /* From now on, we cannot access info->control */
1155         iwl_mvm_skb_prepare_status(skb, dev_cmd);
1156
1157         if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id))
1158                 goto drop_unlock_sta;
1159
1160         if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc))
1161                 mvmsta->tid_data[tid].seq_number = seq_number + 0x10;
1162
1163         spin_unlock(&mvmsta->lock);
1164
1165         iwl_mvm_tx_pkt_queued(mvm, mvmsta, tid == IWL_MAX_TID_COUNT ? 0 : tid);
1166
1167         return 0;
1168
1169 drop_unlock_sta:
1170         iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1171         spin_unlock(&mvmsta->lock);
1172 drop:
1173         return -1;
1174 }
1175
1176 int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb,
1177                    struct ieee80211_sta *sta)
1178 {
1179         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1180         struct ieee80211_tx_info info;
1181         struct sk_buff_head mpdus_skbs;
1182         unsigned int payload_len;
1183         int ret;
1184
1185         if (WARN_ON_ONCE(!mvmsta))
1186                 return -1;
1187
1188         if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA))
1189                 return -1;
1190
1191         memcpy(&info, skb->cb, sizeof(info));
1192
1193         if (!skb_is_gso(skb))
1194                 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1195
1196         payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
1197                 tcp_hdrlen(skb) + skb->data_len;
1198
1199         if (payload_len <= skb_shinfo(skb)->gso_size)
1200                 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1201
1202         __skb_queue_head_init(&mpdus_skbs);
1203
1204         ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs);
1205         if (ret)
1206                 return ret;
1207
1208         if (WARN_ON(skb_queue_empty(&mpdus_skbs)))
1209                 return ret;
1210
1211         while (!skb_queue_empty(&mpdus_skbs)) {
1212                 skb = __skb_dequeue(&mpdus_skbs);
1213
1214                 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1215                 if (ret) {
1216                         __skb_queue_purge(&mpdus_skbs);
1217                         return ret;
1218                 }
1219         }
1220
1221         return 0;
1222 }
1223
1224 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm,
1225                                       struct ieee80211_sta *sta, u8 tid)
1226 {
1227         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1228         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1229         struct ieee80211_vif *vif = mvmsta->vif;
1230         u16 normalized_ssn;
1231
1232         lockdep_assert_held(&mvmsta->lock);
1233
1234         if ((tid_data->state == IWL_AGG_ON ||
1235              tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) &&
1236             iwl_mvm_tid_queued(mvm, tid_data) == 0) {
1237                 /*
1238                  * Now that this aggregation or DQA queue is empty tell
1239                  * mac80211 so it knows we no longer have frames buffered for
1240                  * the station on this TID (for the TIM bitmap calculation.)
1241                  */
1242                 ieee80211_sta_set_buffered(sta, tid, false);
1243         }
1244
1245         /*
1246          * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
1247          * to align the wrap around of ssn so we compare relevant values.
1248          */
1249         normalized_ssn = tid_data->ssn;
1250         if (mvm->trans->cfg->gen2)
1251                 normalized_ssn &= 0xff;
1252
1253         if (normalized_ssn != tid_data->next_reclaimed)
1254                 return;
1255
1256         switch (tid_data->state) {
1257         case IWL_EMPTYING_HW_QUEUE_ADDBA:
1258                 IWL_DEBUG_TX_QUEUES(mvm,
1259                                     "Can continue addBA flow ssn = next_recl = %d\n",
1260                                     tid_data->next_reclaimed);
1261                 tid_data->state = IWL_AGG_STARTING;
1262                 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1263                 break;
1264
1265         case IWL_EMPTYING_HW_QUEUE_DELBA:
1266                 IWL_DEBUG_TX_QUEUES(mvm,
1267                                     "Can continue DELBA flow ssn = next_recl = %d\n",
1268                                     tid_data->next_reclaimed);
1269                 tid_data->state = IWL_AGG_OFF;
1270                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1271                 break;
1272
1273         default:
1274                 break;
1275         }
1276 }
1277
1278 #ifdef CONFIG_IWLWIFI_DEBUG
1279 const char *iwl_mvm_get_tx_fail_reason(u32 status)
1280 {
1281 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
1282 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
1283
1284         switch (status & TX_STATUS_MSK) {
1285         case TX_STATUS_SUCCESS:
1286                 return "SUCCESS";
1287         TX_STATUS_POSTPONE(DELAY);
1288         TX_STATUS_POSTPONE(FEW_BYTES);
1289         TX_STATUS_POSTPONE(BT_PRIO);
1290         TX_STATUS_POSTPONE(QUIET_PERIOD);
1291         TX_STATUS_POSTPONE(CALC_TTAK);
1292         TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
1293         TX_STATUS_FAIL(SHORT_LIMIT);
1294         TX_STATUS_FAIL(LONG_LIMIT);
1295         TX_STATUS_FAIL(UNDERRUN);
1296         TX_STATUS_FAIL(DRAIN_FLOW);
1297         TX_STATUS_FAIL(RFKILL_FLUSH);
1298         TX_STATUS_FAIL(LIFE_EXPIRE);
1299         TX_STATUS_FAIL(DEST_PS);
1300         TX_STATUS_FAIL(HOST_ABORTED);
1301         TX_STATUS_FAIL(BT_RETRY);
1302         TX_STATUS_FAIL(STA_INVALID);
1303         TX_STATUS_FAIL(FRAG_DROPPED);
1304         TX_STATUS_FAIL(TID_DISABLE);
1305         TX_STATUS_FAIL(FIFO_FLUSHED);
1306         TX_STATUS_FAIL(SMALL_CF_POLL);
1307         TX_STATUS_FAIL(FW_DROP);
1308         TX_STATUS_FAIL(STA_COLOR_MISMATCH);
1309         }
1310
1311         return "UNKNOWN";
1312
1313 #undef TX_STATUS_FAIL
1314 #undef TX_STATUS_POSTPONE
1315 }
1316 #endif /* CONFIG_IWLWIFI_DEBUG */
1317
1318 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags,
1319                                enum nl80211_band band,
1320                                struct ieee80211_tx_rate *r)
1321 {
1322         if (rate_n_flags & RATE_HT_MCS_GF_MSK)
1323                 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
1324         switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
1325         case RATE_MCS_CHAN_WIDTH_20:
1326                 break;
1327         case RATE_MCS_CHAN_WIDTH_40:
1328                 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
1329                 break;
1330         case RATE_MCS_CHAN_WIDTH_80:
1331                 r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH;
1332                 break;
1333         case RATE_MCS_CHAN_WIDTH_160:
1334                 r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH;
1335                 break;
1336         }
1337         if (rate_n_flags & RATE_MCS_SGI_MSK)
1338                 r->flags |= IEEE80211_TX_RC_SHORT_GI;
1339         if (rate_n_flags & RATE_MCS_HT_MSK) {
1340                 r->flags |= IEEE80211_TX_RC_MCS;
1341                 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
1342         } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
1343                 ieee80211_rate_set_vht(
1344                         r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK,
1345                         ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
1346                                                 RATE_VHT_MCS_NSS_POS) + 1);
1347                 r->flags |= IEEE80211_TX_RC_VHT_MCS;
1348         } else {
1349                 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
1350                                                              band);
1351         }
1352 }
1353
1354 /**
1355  * translate ucode response to mac80211 tx status control values
1356  */
1357 static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags,
1358                                         struct ieee80211_tx_info *info)
1359 {
1360         struct ieee80211_tx_rate *r = &info->status.rates[0];
1361
1362         info->status.antenna =
1363                 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
1364         iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r);
1365 }
1366
1367 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm,
1368                                             u32 status)
1369 {
1370         struct iwl_fw_dbg_trigger_tlv *trig;
1371         struct iwl_fw_dbg_trigger_tx_status *status_trig;
1372         int i;
1373
1374         trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL,
1375                                      FW_DBG_TRIGGER_TX_STATUS);
1376         if (!trig)
1377                 return;
1378
1379         status_trig = (void *)trig->data;
1380
1381         for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) {
1382                 /* don't collect on status 0 */
1383                 if (!status_trig->statuses[i].status)
1384                         break;
1385
1386                 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK))
1387                         continue;
1388
1389                 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
1390                                         "Tx status %d was received",
1391                                         status & TX_STATUS_MSK);
1392                 break;
1393         }
1394 }
1395
1396 /**
1397  * iwl_mvm_get_scd_ssn - returns the SSN of the SCD
1398  * @tx_resp: the Tx response from the fw (agg or non-agg)
1399  *
1400  * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since
1401  * it can't know that everything will go well until the end of the AMPDU, it
1402  * can't know in advance the number of MPDUs that will be sent in the current
1403  * batch. This is why it writes the agg Tx response while it fetches the MPDUs.
1404  * Hence, it can't know in advance what the SSN of the SCD will be at the end
1405  * of the batch. This is why the SSN of the SCD is written at the end of the
1406  * whole struct at a variable offset. This function knows how to cope with the
1407  * variable offset and returns the SSN of the SCD.
1408  */
1409 static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm,
1410                                       struct iwl_mvm_tx_resp *tx_resp)
1411 {
1412         return le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) +
1413                             tx_resp->frame_count) & 0xfff;
1414 }
1415
1416 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm,
1417                                      struct iwl_rx_packet *pkt)
1418 {
1419         struct ieee80211_sta *sta;
1420         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1421         int txq_id = SEQ_TO_QUEUE(sequence);
1422         /* struct iwl_mvm_tx_resp_v3 is almost the same */
1423         struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1424         int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1425         int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1426         struct agg_tx_status *agg_status =
1427                 iwl_mvm_get_agg_status(mvm, tx_resp);
1428         u32 status = le16_to_cpu(agg_status->status);
1429         u16 ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp);
1430         struct sk_buff_head skbs;
1431         u8 skb_freed = 0;
1432         u8 lq_color;
1433         u16 next_reclaimed, seq_ctl;
1434         bool is_ndp = false;
1435
1436         __skb_queue_head_init(&skbs);
1437
1438         if (iwl_mvm_has_new_tx_api(mvm))
1439                 txq_id = le16_to_cpu(tx_resp->tx_queue);
1440
1441         seq_ctl = le16_to_cpu(tx_resp->seq_ctl);
1442
1443         /* we can free until ssn % q.n_bd not inclusive */
1444         iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs);
1445
1446         while (!skb_queue_empty(&skbs)) {
1447                 struct sk_buff *skb = __skb_dequeue(&skbs);
1448                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1449                 struct ieee80211_hdr *hdr = (void *)skb->data;
1450                 bool flushed = false;
1451
1452                 skb_freed++;
1453
1454                 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1455
1456                 memset(&info->status, 0, sizeof(info->status));
1457
1458                 /* inform mac80211 about what happened with the frame */
1459                 switch (status & TX_STATUS_MSK) {
1460                 case TX_STATUS_SUCCESS:
1461                 case TX_STATUS_DIRECT_DONE:
1462                         info->flags |= IEEE80211_TX_STAT_ACK;
1463                         break;
1464                 case TX_STATUS_FAIL_FIFO_FLUSHED:
1465                 case TX_STATUS_FAIL_DRAIN_FLOW:
1466                         flushed = true;
1467                         break;
1468                 case TX_STATUS_FAIL_DEST_PS:
1469                         /* the FW should have stopped the queue and not
1470                          * return this status
1471                          */
1472                         WARN_ON(1);
1473                         info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
1474                         break;
1475                 default:
1476                         break;
1477                 }
1478
1479                 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS &&
1480                     ieee80211_is_mgmt(hdr->frame_control))
1481                         iwl_mvm_toggle_tx_ant(mvm, &mvm->mgmt_last_antenna_idx);
1482
1483                 /*
1484                  * If we are freeing multiple frames, mark all the frames
1485                  * but the first one as acked, since they were acknowledged
1486                  * before
1487                  * */
1488                 if (skb_freed > 1)
1489                         info->flags |= IEEE80211_TX_STAT_ACK;
1490
1491                 iwl_mvm_tx_status_check_trigger(mvm, status);
1492
1493                 info->status.rates[0].count = tx_resp->failure_frame + 1;
1494                 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate),
1495                                             info);
1496                 info->status.status_driver_data[1] =
1497                         (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate);
1498
1499                 /* Single frame failure in an AMPDU queue => send BAR */
1500                 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
1501                     !(info->flags & IEEE80211_TX_STAT_ACK) &&
1502                     !(info->flags & IEEE80211_TX_STAT_TX_FILTERED) && !flushed)
1503                         info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1504                 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1505
1506                 /* W/A FW bug: seq_ctl is wrong upon failure / BAR frame */
1507                 if (ieee80211_is_back_req(hdr->frame_control))
1508                         seq_ctl = 0;
1509                 else if (status != TX_STATUS_SUCCESS)
1510                         seq_ctl = le16_to_cpu(hdr->seq_ctrl);
1511
1512                 if (unlikely(!seq_ctl)) {
1513                         struct ieee80211_hdr *hdr = (void *)skb->data;
1514
1515                         /*
1516                          * If it is an NDP, we can't update next_reclaim since
1517                          * its sequence control is 0. Note that for that same
1518                          * reason, NDPs are never sent to A-MPDU'able queues
1519                          * so that we can never have more than one freed frame
1520                          * for a single Tx resonse (see WARN_ON below).
1521                          */
1522                         if (ieee80211_is_qos_nullfunc(hdr->frame_control))
1523                                 is_ndp = true;
1524                 }
1525
1526                 /*
1527                  * TODO: this is not accurate if we are freeing more than one
1528                  * packet.
1529                  */
1530                 info->status.tx_time =
1531                         le16_to_cpu(tx_resp->wireless_media_time);
1532                 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1);
1533                 lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info);
1534                 info->status.status_driver_data[0] =
1535                         RS_DRV_DATA_PACK(lq_color, tx_resp->reduced_tpc);
1536
1537                 ieee80211_tx_status(mvm->hw, skb);
1538         }
1539
1540         /* This is an aggregation queue or might become one, so we use
1541          * the ssn since: ssn = wifi seq_num % 256.
1542          * The seq_ctl is the sequence control of the packet to which
1543          * this Tx response relates. But if there is a hole in the
1544          * bitmap of the BA we received, this Tx response may allow to
1545          * reclaim the hole and all the subsequent packets that were
1546          * already acked. In that case, seq_ctl != ssn, and the next
1547          * packet to be reclaimed will be ssn and not seq_ctl. In that
1548          * case, several packets will be reclaimed even if
1549          * frame_count = 1.
1550          *
1551          * The ssn is the index (% 256) of the latest packet that has
1552          * treated (acked / dropped) + 1.
1553          */
1554         next_reclaimed = ssn;
1555
1556         IWL_DEBUG_TX_REPLY(mvm,
1557                            "TXQ %d status %s (0x%08x)\n",
1558                            txq_id, iwl_mvm_get_tx_fail_reason(status), status);
1559
1560         IWL_DEBUG_TX_REPLY(mvm,
1561                            "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
1562                            le32_to_cpu(tx_resp->initial_rate),
1563                            tx_resp->failure_frame, SEQ_TO_INDEX(sequence),
1564                            ssn, next_reclaimed, seq_ctl);
1565
1566         rcu_read_lock();
1567
1568         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1569         /*
1570          * sta can't be NULL otherwise it'd mean that the sta has been freed in
1571          * the firmware while we still have packets for it in the Tx queues.
1572          */
1573         if (WARN_ON_ONCE(!sta))
1574                 goto out;
1575
1576         if (!IS_ERR(sta)) {
1577                 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1578
1579                 iwl_mvm_tx_airtime(mvm, mvmsta,
1580                                    le16_to_cpu(tx_resp->wireless_media_time));
1581
1582                 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS &&
1583                     mvmsta->sta_state < IEEE80211_STA_AUTHORIZED)
1584                         iwl_mvm_toggle_tx_ant(mvm, &mvmsta->tx_ant);
1585
1586                 if (sta->wme && tid != IWL_MGMT_TID) {
1587                         struct iwl_mvm_tid_data *tid_data =
1588                                 &mvmsta->tid_data[tid];
1589                         bool send_eosp_ndp = false;
1590
1591                         spin_lock_bh(&mvmsta->lock);
1592
1593                         if (!is_ndp) {
1594                                 tid_data->next_reclaimed = next_reclaimed;
1595                                 IWL_DEBUG_TX_REPLY(mvm,
1596                                                    "Next reclaimed packet:%d\n",
1597                                                    next_reclaimed);
1598                         } else {
1599                                 IWL_DEBUG_TX_REPLY(mvm,
1600                                                    "NDP - don't update next_reclaimed\n");
1601                         }
1602
1603                         iwl_mvm_check_ratid_empty(mvm, sta, tid);
1604
1605                         if (mvmsta->sleep_tx_count) {
1606                                 mvmsta->sleep_tx_count--;
1607                                 if (mvmsta->sleep_tx_count &&
1608                                     !iwl_mvm_tid_queued(mvm, tid_data)) {
1609                                         /*
1610                                          * The number of frames in the queue
1611                                          * dropped to 0 even if we sent less
1612                                          * frames than we thought we had on the
1613                                          * Tx queue.
1614                                          * This means we had holes in the BA
1615                                          * window that we just filled, ask
1616                                          * mac80211 to send EOSP since the
1617                                          * firmware won't know how to do that.
1618                                          * Send NDP and the firmware will send
1619                                          * EOSP notification that will trigger
1620                                          * a call to ieee80211_sta_eosp().
1621                                          */
1622                                         send_eosp_ndp = true;
1623                                 }
1624                         }
1625
1626                         spin_unlock_bh(&mvmsta->lock);
1627                         if (send_eosp_ndp) {
1628                                 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta,
1629                                         IEEE80211_FRAME_RELEASE_UAPSD,
1630                                         1, tid, false, false);
1631                                 mvmsta->sleep_tx_count = 0;
1632                                 ieee80211_send_eosp_nullfunc(sta, tid);
1633                         }
1634                 }
1635
1636                 if (mvmsta->next_status_eosp) {
1637                         mvmsta->next_status_eosp = false;
1638                         ieee80211_sta_eosp(sta);
1639                 }
1640         }
1641 out:
1642         rcu_read_unlock();
1643 }
1644
1645 #ifdef CONFIG_IWLWIFI_DEBUG
1646 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
1647 static const char *iwl_get_agg_tx_status(u16 status)
1648 {
1649         switch (status & AGG_TX_STATE_STATUS_MSK) {
1650         AGG_TX_STATE_(TRANSMITTED);
1651         AGG_TX_STATE_(UNDERRUN);
1652         AGG_TX_STATE_(BT_PRIO);
1653         AGG_TX_STATE_(FEW_BYTES);
1654         AGG_TX_STATE_(ABORT);
1655         AGG_TX_STATE_(TX_ON_AIR_DROP);
1656         AGG_TX_STATE_(LAST_SENT_TRY_CNT);
1657         AGG_TX_STATE_(LAST_SENT_BT_KILL);
1658         AGG_TX_STATE_(SCD_QUERY);
1659         AGG_TX_STATE_(TEST_BAD_CRC32);
1660         AGG_TX_STATE_(RESPONSE);
1661         AGG_TX_STATE_(DUMP_TX);
1662         AGG_TX_STATE_(DELAY_TX);
1663         }
1664
1665         return "UNKNOWN";
1666 }
1667
1668 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1669                                       struct iwl_rx_packet *pkt)
1670 {
1671         struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1672         struct agg_tx_status *frame_status =
1673                 iwl_mvm_get_agg_status(mvm, tx_resp);
1674         int i;
1675
1676         for (i = 0; i < tx_resp->frame_count; i++) {
1677                 u16 fstatus = le16_to_cpu(frame_status[i].status);
1678
1679                 IWL_DEBUG_TX_REPLY(mvm,
1680                                    "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
1681                                    iwl_get_agg_tx_status(fstatus),
1682                                    fstatus & AGG_TX_STATE_STATUS_MSK,
1683                                    (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >>
1684                                         AGG_TX_STATE_TRY_CNT_POS,
1685                                    le16_to_cpu(frame_status[i].sequence));
1686         }
1687 }
1688 #else
1689 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1690                                       struct iwl_rx_packet *pkt)
1691 {}
1692 #endif /* CONFIG_IWLWIFI_DEBUG */
1693
1694 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm,
1695                                   struct iwl_rx_packet *pkt)
1696 {
1697         struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1698         int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1699         int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1700         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1701         struct iwl_mvm_sta *mvmsta;
1702         int queue = SEQ_TO_QUEUE(sequence);
1703         struct ieee80211_sta *sta;
1704
1705         if (WARN_ON_ONCE(queue < IWL_MVM_DQA_MIN_DATA_QUEUE &&
1706                          (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)))
1707                 return;
1708
1709         iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt);
1710
1711         rcu_read_lock();
1712
1713         mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1714
1715         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1716         if (WARN_ON_ONCE(!sta || !sta->wme)) {
1717                 rcu_read_unlock();
1718                 return;
1719         }
1720
1721         if (!WARN_ON_ONCE(!mvmsta)) {
1722                 mvmsta->tid_data[tid].rate_n_flags =
1723                         le32_to_cpu(tx_resp->initial_rate);
1724                 mvmsta->tid_data[tid].tx_time =
1725                         le16_to_cpu(tx_resp->wireless_media_time);
1726                 mvmsta->tid_data[tid].lq_color =
1727                         TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info);
1728                 iwl_mvm_tx_airtime(mvm, mvmsta,
1729                                    le16_to_cpu(tx_resp->wireless_media_time));
1730         }
1731
1732         rcu_read_unlock();
1733 }
1734
1735 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1736 {
1737         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1738         struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1739
1740         if (tx_resp->frame_count == 1)
1741                 iwl_mvm_rx_tx_cmd_single(mvm, pkt);
1742         else
1743                 iwl_mvm_rx_tx_cmd_agg(mvm, pkt);
1744 }
1745
1746 static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid,
1747                                int txq, int index,
1748                                struct ieee80211_tx_info *ba_info, u32 rate)
1749 {
1750         struct sk_buff_head reclaimed_skbs;
1751         struct iwl_mvm_tid_data *tid_data;
1752         struct ieee80211_sta *sta;
1753         struct iwl_mvm_sta *mvmsta;
1754         struct sk_buff *skb;
1755         int freed;
1756
1757         if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT ||
1758                       tid > IWL_MAX_TID_COUNT,
1759                       "sta_id %d tid %d", sta_id, tid))
1760                 return;
1761
1762         rcu_read_lock();
1763
1764         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1765
1766         /* Reclaiming frames for a station that has been deleted ? */
1767         if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
1768                 rcu_read_unlock();
1769                 return;
1770         }
1771
1772         mvmsta = iwl_mvm_sta_from_mac80211(sta);
1773         tid_data = &mvmsta->tid_data[tid];
1774
1775         if (tid_data->txq_id != txq) {
1776                 IWL_ERR(mvm,
1777                         "invalid BA notification: Q %d, tid %d\n",
1778                         tid_data->txq_id, tid);
1779                 rcu_read_unlock();
1780                 return;
1781         }
1782
1783         __skb_queue_head_init(&reclaimed_skbs);
1784
1785         /*
1786          * Release all TFDs before the SSN, i.e. all TFDs in front of
1787          * block-ack window (we assume that they've been successfully
1788          * transmitted ... if not, it's too late anyway).
1789          */
1790         iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs);
1791
1792         spin_lock_bh(&mvmsta->lock);
1793
1794         tid_data->next_reclaimed = index;
1795
1796         iwl_mvm_check_ratid_empty(mvm, sta, tid);
1797
1798         freed = 0;
1799
1800         /* pack lq color from tid_data along the reduced txp */
1801         ba_info->status.status_driver_data[0] =
1802                 RS_DRV_DATA_PACK(tid_data->lq_color,
1803                                  ba_info->status.status_driver_data[0]);
1804         ba_info->status.status_driver_data[1] = (void *)(uintptr_t)rate;
1805
1806         skb_queue_walk(&reclaimed_skbs, skb) {
1807                 struct ieee80211_hdr *hdr = (void *)skb->data;
1808                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1809
1810                 if (ieee80211_is_data_qos(hdr->frame_control))
1811                         freed++;
1812                 else
1813                         WARN_ON_ONCE(tid != IWL_MAX_TID_COUNT);
1814
1815                 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1816
1817                 memset(&info->status, 0, sizeof(info->status));
1818                 /* Packet was transmitted successfully, failures come as single
1819                  * frames because before failing a frame the firmware transmits
1820                  * it without aggregation at least once.
1821                  */
1822                 info->flags |= IEEE80211_TX_STAT_ACK;
1823
1824                 /* this is the first skb we deliver in this batch */
1825                 /* put the rate scaling data there */
1826                 if (freed == 1) {
1827                         info->flags |= IEEE80211_TX_STAT_AMPDU;
1828                         memcpy(&info->status, &ba_info->status,
1829                                sizeof(ba_info->status));
1830                         iwl_mvm_hwrate_to_tx_status(rate, info);
1831                 }
1832         }
1833
1834         spin_unlock_bh(&mvmsta->lock);
1835
1836         /* We got a BA notif with 0 acked or scd_ssn didn't progress which is
1837          * possible (i.e. first MPDU in the aggregation wasn't acked)
1838          * Still it's important to update RS about sent vs. acked.
1839          */
1840         if (skb_queue_empty(&reclaimed_skbs)) {
1841                 struct ieee80211_chanctx_conf *chanctx_conf = NULL;
1842
1843                 if (mvmsta->vif)
1844                         chanctx_conf =
1845                                 rcu_dereference(mvmsta->vif->chanctx_conf);
1846
1847                 if (WARN_ON_ONCE(!chanctx_conf))
1848                         goto out;
1849
1850                 ba_info->band = chanctx_conf->def.chan->band;
1851                 iwl_mvm_hwrate_to_tx_status(rate, ba_info);
1852
1853                 if (!iwl_mvm_has_tlc_offload(mvm)) {
1854                         IWL_DEBUG_TX_REPLY(mvm,
1855                                            "No reclaim. Update rs directly\n");
1856                         iwl_mvm_rs_tx_status(mvm, sta, tid, ba_info, false);
1857                 }
1858         }
1859
1860 out:
1861         rcu_read_unlock();
1862
1863         while (!skb_queue_empty(&reclaimed_skbs)) {
1864                 skb = __skb_dequeue(&reclaimed_skbs);
1865                 ieee80211_tx_status(mvm->hw, skb);
1866         }
1867 }
1868
1869 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1870 {
1871         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1872         int sta_id, tid, txq, index;
1873         struct ieee80211_tx_info ba_info = {};
1874         struct iwl_mvm_ba_notif *ba_notif;
1875         struct iwl_mvm_tid_data *tid_data;
1876         struct iwl_mvm_sta *mvmsta;
1877
1878         ba_info.flags = IEEE80211_TX_STAT_AMPDU;
1879
1880         if (iwl_mvm_has_new_tx_api(mvm)) {
1881                 struct iwl_mvm_compressed_ba_notif *ba_res =
1882                         (void *)pkt->data;
1883                 u8 lq_color = TX_RES_RATE_TABLE_COL_GET(ba_res->tlc_rate_info);
1884                 int i;
1885
1886                 sta_id = ba_res->sta_id;
1887                 ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done);
1888                 ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed);
1889                 ba_info.status.tx_time =
1890                         (u16)le32_to_cpu(ba_res->wireless_time);
1891                 ba_info.status.status_driver_data[0] =
1892                         (void *)(uintptr_t)ba_res->reduced_txp;
1893
1894                 if (!le16_to_cpu(ba_res->tfd_cnt))
1895                         goto out;
1896
1897                 rcu_read_lock();
1898
1899                 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1900                 if (!mvmsta)
1901                         goto out_unlock;
1902
1903                 /* Free per TID */
1904                 for (i = 0; i < le16_to_cpu(ba_res->tfd_cnt); i++) {
1905                         struct iwl_mvm_compressed_ba_tfd *ba_tfd =
1906                                 &ba_res->tfd[i];
1907
1908                         tid = ba_tfd->tid;
1909                         if (tid == IWL_MGMT_TID)
1910                                 tid = IWL_MAX_TID_COUNT;
1911
1912                         mvmsta->tid_data[i].lq_color = lq_color;
1913                         iwl_mvm_tx_reclaim(mvm, sta_id, tid,
1914                                            (int)(le16_to_cpu(ba_tfd->q_num)),
1915                                            le16_to_cpu(ba_tfd->tfd_index),
1916                                            &ba_info,
1917                                            le32_to_cpu(ba_res->tx_rate));
1918                 }
1919
1920                 iwl_mvm_tx_airtime(mvm, mvmsta,
1921                                    le32_to_cpu(ba_res->wireless_time));
1922 out_unlock:
1923                 rcu_read_unlock();
1924 out:
1925                 IWL_DEBUG_TX_REPLY(mvm,
1926                                    "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n",
1927                                    sta_id, le32_to_cpu(ba_res->flags),
1928                                    le16_to_cpu(ba_res->txed),
1929                                    le16_to_cpu(ba_res->done));
1930                 return;
1931         }
1932
1933         ba_notif = (void *)pkt->data;
1934         sta_id = ba_notif->sta_id;
1935         tid = ba_notif->tid;
1936         /* "flow" corresponds to Tx queue */
1937         txq = le16_to_cpu(ba_notif->scd_flow);
1938         /* "ssn" is start of block-ack Tx window, corresponds to index
1939          * (in Tx queue's circular buffer) of first TFD/frame in window */
1940         index = le16_to_cpu(ba_notif->scd_ssn);
1941
1942         rcu_read_lock();
1943         mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1944         if (WARN_ON_ONCE(!mvmsta)) {
1945                 rcu_read_unlock();
1946                 return;
1947         }
1948
1949         tid_data = &mvmsta->tid_data[tid];
1950
1951         ba_info.status.ampdu_ack_len = ba_notif->txed_2_done;
1952         ba_info.status.ampdu_len = ba_notif->txed;
1953         ba_info.status.tx_time = tid_data->tx_time;
1954         ba_info.status.status_driver_data[0] =
1955                 (void *)(uintptr_t)ba_notif->reduced_txp;
1956
1957         rcu_read_unlock();
1958
1959         iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info,
1960                            tid_data->rate_n_flags);
1961
1962         IWL_DEBUG_TX_REPLY(mvm,
1963                            "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
1964                            ba_notif->sta_addr, ba_notif->sta_id);
1965
1966         IWL_DEBUG_TX_REPLY(mvm,
1967                            "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
1968                            ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl),
1969                            le64_to_cpu(ba_notif->bitmap), txq, index,
1970                            ba_notif->txed, ba_notif->txed_2_done);
1971
1972         IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n",
1973                            ba_notif->reduced_txp);
1974 }
1975
1976 /*
1977  * Note that there are transports that buffer frames before they reach
1978  * the firmware. This means that after flush_tx_path is called, the
1979  * queue might not be empty. The race-free way to handle this is to:
1980  * 1) set the station as draining
1981  * 2) flush the Tx path
1982  * 3) wait for the transport queues to be empty
1983  */
1984 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, u32 flags)
1985 {
1986         int ret;
1987         struct iwl_tx_path_flush_cmd_v1 flush_cmd = {
1988                 .queues_ctl = cpu_to_le32(tfd_msk),
1989                 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH),
1990         };
1991
1992         WARN_ON(iwl_mvm_has_new_tx_api(mvm));
1993
1994         ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags,
1995                                    sizeof(flush_cmd), &flush_cmd);
1996         if (ret)
1997                 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
1998         return ret;
1999 }
2000
2001 int iwl_mvm_flush_sta_tids(struct iwl_mvm *mvm, u32 sta_id,
2002                            u16 tids, u32 flags)
2003 {
2004         int ret;
2005         struct iwl_tx_path_flush_cmd flush_cmd = {
2006                 .sta_id = cpu_to_le32(sta_id),
2007                 .tid_mask = cpu_to_le16(tids),
2008         };
2009
2010         WARN_ON(!iwl_mvm_has_new_tx_api(mvm));
2011
2012         ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags,
2013                                    sizeof(flush_cmd), &flush_cmd);
2014         if (ret)
2015                 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
2016         return ret;
2017 }
2018
2019 int iwl_mvm_flush_sta(struct iwl_mvm *mvm, void *sta, bool internal, u32 flags)
2020 {
2021         struct iwl_mvm_int_sta *int_sta = sta;
2022         struct iwl_mvm_sta *mvm_sta = sta;
2023
2024         BUILD_BUG_ON(offsetof(struct iwl_mvm_int_sta, sta_id) !=
2025                      offsetof(struct iwl_mvm_sta, sta_id));
2026
2027         if (iwl_mvm_has_new_tx_api(mvm))
2028                 return iwl_mvm_flush_sta_tids(mvm, mvm_sta->sta_id,
2029                                               0xff | BIT(IWL_MGMT_TID), flags);
2030
2031         if (internal)
2032                 return iwl_mvm_flush_tx_path(mvm, int_sta->tfd_queue_msk,
2033                                              flags);
2034
2035         return iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, flags);
2036 }