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, __le16 fc)
 606 {
 607         struct iwl_mvm_vif *mvmvif;
 608
 609         mvmvif = iwl_mvm_vif_from_mac80211(info->control.vif);
 610
 611         switch (info->control.vif->type) {
 612         case NL80211_IFTYPE_AP:
 613         case NL80211_IFTYPE_ADHOC:
 614                 /*
 615                  * Non-bufferable frames use the broadcast station, thus they
 616                  * use the probe queue.
 617                  * Also take care of the case where we send a deauth to a
 618                  * station that we don't have, or similarly an association
 619                  * response (with non-success status) for a station we can't
 620                  * accept.
 621                  * Also, disassociate frames might happen, particular with
 622                  * reason 7 ("Class 3 frame received from nonassociated STA").
 623                  */
 624                 if (ieee80211_is_mgmt(fc) &&
 625                     (!ieee80211_is_bufferable_mmpdu(fc) ||
 626                      ieee80211_is_deauth(fc) || ieee80211_is_disassoc(fc)))
 627                         return mvm->probe_queue;
 628                 if (info->hw_queue == info->control.vif->cab_queue)
 629                         return mvmvif->cab_queue;
 630
 631                 WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC,
 632                           "fc=0x%02x", le16_to_cpu(fc));
 633                 return mvm->probe_queue;
 634         case NL80211_IFTYPE_P2P_DEVICE:
 635                 if (ieee80211_is_mgmt(fc))
 636                         return mvm->p2p_dev_queue;
 637                 if (info->hw_queue == info->control.vif->cab_queue)
 638                         return mvmvif->cab_queue;
 639
 640                 WARN_ON_ONCE(1);
 641                 return mvm->p2p_dev_queue;
 642         default:
 643                 WARN_ONCE(1, "Not a ctrl vif, no available queue\n");
 644                 return -1;
 645         }
 646 }
 647
 648 static void iwl_mvm_probe_resp_set_noa(struct iwl_mvm *mvm,
 649                                        struct sk_buff *skb)
 650 {
 651         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 652         struct iwl_mvm_vif *mvmvif =
 653                 iwl_mvm_vif_from_mac80211(info->control.vif);
 654         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
 655         int base_len = (u8 *)mgmt->u.probe_resp.variable - (u8 *)mgmt;
 656         struct iwl_probe_resp_data *resp_data;
 657         u8 *ie, *pos;
 658         u8 match[] = {
 659                 (WLAN_OUI_WFA >> 16) & 0xff,
 660                 (WLAN_OUI_WFA >> 8) & 0xff,
 661                 WLAN_OUI_WFA & 0xff,
 662                 WLAN_OUI_TYPE_WFA_P2P,
 663         };
 664
 665         rcu_read_lock();
 666
 667         resp_data = rcu_dereference(mvmvif->probe_resp_data);
 668         if (!resp_data)
 669                 goto out;
 670
 671         if (!resp_data->notif.noa_active)
 672                 goto out;
 673
 674         ie = (u8 *)cfg80211_find_ie_match(WLAN_EID_VENDOR_SPECIFIC,
 675                                           mgmt->u.probe_resp.variable,
 676                                           skb->len - base_len,
 677                                           match, 4, 2);
 678         if (!ie) {
 679                 IWL_DEBUG_TX(mvm, "probe resp doesn't have P2P IE\n");
 680                 goto out;
 681         }
 682
 683         if (skb_tailroom(skb) < resp_data->noa_len) {
 684                 if (pskb_expand_head(skb, 0, resp_data->noa_len, GFP_ATOMIC)) {
 685                         IWL_ERR(mvm,
 686                                 "Failed to reallocate probe resp\n");
 687                         goto out;
 688                 }
 689         }
 690
 691         pos = skb_put(skb, resp_data->noa_len);
 692
 693         *pos++ = WLAN_EID_VENDOR_SPECIFIC;
 694         /* Set length of IE body (not including ID and length itself) */
 695         *pos++ = resp_data->noa_len - 2;
 696         *pos++ = (WLAN_OUI_WFA >> 16) & 0xff;
 697         *pos++ = (WLAN_OUI_WFA >> 8) & 0xff;
 698         *pos++ = WLAN_OUI_WFA & 0xff;
 699         *pos++ = WLAN_OUI_TYPE_WFA_P2P;
 700
 701         memcpy(pos, &resp_data->notif.noa_attr,
 702                resp_data->noa_len - sizeof(struct ieee80211_vendor_ie));
 703
 704 out:
 705         rcu_read_unlock();
 706 }
 707
 708 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb)
 709 {
 710         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 711         struct ieee80211_tx_info info;
 712         struct iwl_device_cmd *dev_cmd;
 713         u8 sta_id;
 714         int hdrlen = ieee80211_hdrlen(hdr->frame_control);
 715         __le16 fc = hdr->frame_control;
 716         int queue = -1;
 717
 718         memcpy(&info, skb->cb, sizeof(info));
 719
 720         if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU))
 721                 return -1;
 722
 723         if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM &&
 724                          (!info.control.vif ||
 725                           info.hw_queue != info.control.vif->cab_queue)))
 726                 return -1;
 727
 728         if (info.control.vif) {
 729                 struct iwl_mvm_vif *mvmvif =
 730                         iwl_mvm_vif_from_mac80211(info.control.vif);
 731
 732                 if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE ||
 733                     info.control.vif->type == NL80211_IFTYPE_AP ||
 734                     info.control.vif->type == NL80211_IFTYPE_ADHOC) {
 735                         if (!ieee80211_is_data(hdr->frame_control))
 736                                 sta_id = mvmvif->bcast_sta.sta_id;
 737                         else
 738                                 sta_id = mvmvif->mcast_sta.sta_id;
 739
 740                         queue = iwl_mvm_get_ctrl_vif_queue(mvm, &info,
 741                                                            hdr->frame_control);
 742
 743                 } else if (info.control.vif->type == NL80211_IFTYPE_MONITOR) {
 744                         queue = mvm->snif_queue;
 745                         sta_id = mvm->snif_sta.sta_id;
 746                 } else if (info.control.vif->type == NL80211_IFTYPE_STATION &&
 747                            info.hw_queue == IWL_MVM_OFFCHANNEL_QUEUE) {
 748                         /*
 749                          * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets
 750                          * that can be used in 2 different types of vifs, P2P &
 751                          * STATION.
 752                          * P2P uses the offchannel queue.
 753                          * STATION (HS2.0) uses the auxiliary context of the FW,
 754                          * and hence needs to be sent on the aux queue.
 755                          */
 756                         sta_id = mvm->aux_sta.sta_id;
 757                         queue = mvm->aux_queue;
 758                 }
 759         }
 760
 761         if (queue < 0)
 762                 return -1;
 763
 764         if (unlikely(ieee80211_is_probe_resp(fc)))
 765                 iwl_mvm_probe_resp_set_noa(mvm, skb);
 766
 767         IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue);
 768
 769         dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id);
 770         if (!dev_cmd)
 771                 return -1;
 772
 773         /* From now on, we cannot access info->control */
 774         iwl_mvm_skb_prepare_status(skb, dev_cmd);
 775
 776         if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) {
 777                 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
 778                 return -1;
 779         }
 780
 781         return 0;
 782 }
 783
 784 #ifdef CONFIG_INET
 785
 786 static int
 787 iwl_mvm_tx_tso_segment(struct sk_buff *skb, unsigned int num_subframes,
 788                        netdev_features_t netdev_flags,
 789                        struct sk_buff_head *mpdus_skb)
 790 {
 791         struct sk_buff *tmp, *next;
 792         struct ieee80211_hdr *hdr = (void *)skb->data;
 793         char cb[sizeof(skb->cb)];
 794         u16 i = 0;
 795         unsigned int tcp_payload_len;
 796         unsigned int mss = skb_shinfo(skb)->gso_size;
 797         bool ipv4 = (skb->protocol == htons(ETH_P_IP));
 798         u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0;
 799
 800         skb_shinfo(skb)->gso_size = num_subframes * mss;
 801         memcpy(cb, skb->cb, sizeof(cb));
 802
 803         next = skb_gso_segment(skb, netdev_flags);
 804         skb_shinfo(skb)->gso_size = mss;
 805         if (WARN_ON_ONCE(IS_ERR(next)))
 806                 return -EINVAL;
 807         else if (next)
 808                 consume_skb(skb);
 809
 810         while (next) {
 811                 tmp = next;
 812                 next = tmp->next;
 813
 814                 memcpy(tmp->cb, cb, sizeof(tmp->cb));
 815                 /*
 816                  * Compute the length of all the data added for the A-MSDU.
 817                  * This will be used to compute the length to write in the TX
 818                  * command. We have: SNAP + IP + TCP for n -1 subframes and
 819                  * ETH header for n subframes.
 820                  */
 821                 tcp_payload_len = skb_tail_pointer(tmp) -
 822                         skb_transport_header(tmp) -
 823                         tcp_hdrlen(tmp) + tmp->data_len;
 824
 825                 if (ipv4)
 826                         ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes);
 827
 828                 if (tcp_payload_len > mss) {
 829                         skb_shinfo(tmp)->gso_size = mss;
 830                 } else {
 831                         if (ieee80211_is_data_qos(hdr->frame_control)) {
 832                                 u8 *qc;
 833
 834                                 if (ipv4)
 835                                         ip_send_check(ip_hdr(tmp));
 836
 837                                 qc = ieee80211_get_qos_ctl((void *)tmp->data);
 838                                 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
 839                         }
 840                         skb_shinfo(tmp)->gso_size = 0;
 841                 }
 842
 843                 tmp->prev = NULL;
 844                 tmp->next = NULL;
 845
 846                 __skb_queue_tail(mpdus_skb, tmp);
 847                 i++;
 848         }
 849
 850         return 0;
 851 }
 852
 853 static unsigned int iwl_mvm_max_amsdu_size(struct iwl_mvm *mvm,
 854                                            struct ieee80211_sta *sta,
 855                                            unsigned int tid)
 856 {
 857         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 858         enum nl80211_band band = mvmsta->vif->bss_conf.chandef.chan->band;
 859         u8 ac = tid_to_mac80211_ac[tid];
 860         unsigned int txf;
 861         int lmac = IWL_LMAC_24G_INDEX;
 862
 863         if (iwl_mvm_is_cdb_supported(mvm) &&
 864             band == NL80211_BAND_5GHZ)
 865                 lmac = IWL_LMAC_5G_INDEX;
 866
 867         /* For HE redirect to trigger based fifos */
 868         if (sta->he_cap.has_he && !WARN_ON(!iwl_mvm_has_new_tx_api(mvm)))
 869                 ac += 4;
 870
 871         txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac);
 872
 873         /*
 874          * Don't send an AMSDU that will be longer than the TXF.
 875          * Add a security margin of 256 for the TX command + headers.
 876          * We also want to have the start of the next packet inside the
 877          * fifo to be able to send bursts.
 878          */
 879         return min_t(unsigned int, mvmsta->max_amsdu_len,
 880                      mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256);
 881 }
 882
 883 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
 884                           struct ieee80211_tx_info *info,
 885                           struct ieee80211_sta *sta,
 886                           struct sk_buff_head *mpdus_skb)
 887 {
 888         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 889         struct ieee80211_hdr *hdr = (void *)skb->data;
 890         unsigned int mss = skb_shinfo(skb)->gso_size;
 891         unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len;
 892         u16 snap_ip_tcp, pad;
 893         unsigned int dbg_max_amsdu_len;
 894         netdev_features_t netdev_flags = NETIF_F_CSUM_MASK | NETIF_F_SG;
 895         u8 tid;
 896
 897         snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) +
 898                 tcp_hdrlen(skb);
 899
 900         dbg_max_amsdu_len = READ_ONCE(mvm->max_amsdu_len);
 901
 902         if (!mvmsta->max_amsdu_len ||
 903             !ieee80211_is_data_qos(hdr->frame_control) ||
 904             (!mvmsta->amsdu_enabled && !dbg_max_amsdu_len))
 905                 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
 906
 907         /*
 908          * Do not build AMSDU for IPv6 with extension headers.
 909          * ask stack to segment and checkum the generated MPDUs for us.
 910          */
 911         if (skb->protocol == htons(ETH_P_IPV6) &&
 912             ((struct ipv6hdr *)skb_network_header(skb))->nexthdr !=
 913             IPPROTO_TCP) {
 914                 netdev_flags &= ~NETIF_F_CSUM_MASK;
 915                 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
 916         }
 917
 918         tid = ieee80211_get_tid(hdr);
 919         if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
 920                 return -EINVAL;
 921
 922         /*
 923          * No need to lock amsdu_in_ampdu_allowed since it can't be modified
 924          * during an BA session.
 925          */
 926         if (info->flags & IEEE80211_TX_CTL_AMPDU &&
 927             !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed)
 928                 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
 929
 930         if (iwl_mvm_vif_low_latency(iwl_mvm_vif_from_mac80211(mvmsta->vif)) ||
 931             !(mvmsta->amsdu_enabled & BIT(tid)))
 932                 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
 933
 934         max_amsdu_len = iwl_mvm_max_amsdu_size(mvm, sta, tid);
 935
 936         if (unlikely(dbg_max_amsdu_len))
 937                 max_amsdu_len = min_t(unsigned int, max_amsdu_len,
 938                                       dbg_max_amsdu_len);
 939
 940         /*
 941          * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not
 942          * supported. This is a spec requirement (IEEE 802.11-2015
 943          * section 8.7.3 NOTE 3).
 944          */
 945         if (info->flags & IEEE80211_TX_CTL_AMPDU &&
 946             !sta->vht_cap.vht_supported)
 947                 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095);
 948
 949         /* Sub frame header + SNAP + IP header + TCP header + MSS */
 950         subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss;
 951         pad = (4 - subf_len) & 0x3;
 952
 953         /*
 954          * If we have N subframes in the A-MSDU, then the A-MSDU's size is
 955          * N * subf_len + (N - 1) * pad.
 956          */
 957         num_subframes = (max_amsdu_len + pad) / (subf_len + pad);
 958
 959         if (sta->max_amsdu_subframes &&
 960             num_subframes > sta->max_amsdu_subframes)
 961                 num_subframes = sta->max_amsdu_subframes;
 962
 963         tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
 964                 tcp_hdrlen(skb) + skb->data_len;
 965
 966         /*
 967          * Make sure we have enough TBs for the A-MSDU:
 968          *      2 for each subframe
 969          *      1 more for each fragment
 970          *      1 more for the potential data in the header
 971          */
 972         if ((num_subframes * 2 + skb_shinfo(skb)->nr_frags + 1) >
 973             mvm->trans->max_skb_frags)
 974                 num_subframes = 1;
 975
 976         if (num_subframes > 1)
 977                 *ieee80211_get_qos_ctl(hdr) |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
 978
 979         /* This skb fits in one single A-MSDU */
 980         if (num_subframes * mss >= tcp_payload_len) {
 981                 __skb_queue_tail(mpdus_skb, skb);
 982                 return 0;
 983         }
 984
 985         /*
 986          * Trick the segmentation function to make it
 987          * create SKBs that can fit into one A-MSDU.
 988          */
 989         return iwl_mvm_tx_tso_segment(skb, num_subframes, netdev_flags,
 990                                       mpdus_skb);
 991 }
 992 #else /* CONFIG_INET */
 993 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
 994                           struct ieee80211_tx_info *info,
 995                           struct ieee80211_sta *sta,
 996                           struct sk_buff_head *mpdus_skb)
 997 {
 998         /* Impossible to get TSO with CONFIG_INET */
 999         WARN_ON(1);
1000
1001         return -1;
1002 }
1003 #endif
1004
1005 static void iwl_mvm_tx_add_stream(struct iwl_mvm *mvm,
1006                                   struct iwl_mvm_sta *mvm_sta, u8 tid,
1007                                   struct sk_buff *skb)
1008 {
1009         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1010         u8 mac_queue = info->hw_queue;
1011         struct sk_buff_head *deferred_tx_frames;
1012
1013         lockdep_assert_held(&mvm_sta->lock);
1014
1015         mvm_sta->deferred_traffic_tid_map |= BIT(tid);
1016         set_bit(mvm_sta->sta_id, mvm->sta_deferred_frames);
1017
1018         deferred_tx_frames = &mvm_sta->tid_data[tid].deferred_tx_frames;
1019
1020         skb_queue_tail(deferred_tx_frames, skb);
1021
1022         /*
1023          * The first deferred frame should've stopped the MAC queues, so we
1024          * should never get a second deferred frame for the RA/TID.
1025          * In case of GSO the first packet may have been split, so don't warn.
1026          */
1027         if (skb_queue_len(deferred_tx_frames) == 1) {
1028                 iwl_mvm_stop_mac_queues(mvm, BIT(mac_queue));
1029                 schedule_work(&mvm->add_stream_wk);
1030         }
1031 }
1032
1033 /* Check if there are any timed-out TIDs on a given shared TXQ */
1034 static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id)
1035 {
1036         unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap;
1037         unsigned long now = jiffies;
1038         int tid;
1039
1040         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1041                 return false;
1042
1043         for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) {
1044                 if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] +
1045                                 IWL_MVM_DQA_QUEUE_TIMEOUT, now))
1046                         return true;
1047         }
1048
1049         return false;
1050 }
1051
1052 static void iwl_mvm_tx_airtime(struct iwl_mvm *mvm,
1053                                struct iwl_mvm_sta *mvmsta,
1054                                int airtime)
1055 {
1056         int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
1057         struct iwl_mvm_tcm_mac *mdata = &mvm->tcm.data[mac];
1058
1059         if (mvm->tcm.paused)
1060                 return;
1061
1062         if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD))
1063                 schedule_delayed_work(&mvm->tcm.work, 0);
1064
1065         mdata->tx.airtime += airtime;
1066 }
1067
1068 static void iwl_mvm_tx_pkt_queued(struct iwl_mvm *mvm,
1069                                   struct iwl_mvm_sta *mvmsta, int tid)
1070 {
1071         u32 ac = tid_to_mac80211_ac[tid];
1072         int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
1073         struct iwl_mvm_tcm_mac *mdata = &mvm->tcm.data[mac];
1074
1075         mdata->tx.pkts[ac]++;
1076 }
1077
1078 /*
1079  * Sets the fields in the Tx cmd that are crypto related
1080  */
1081 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb,
1082                            struct ieee80211_tx_info *info,
1083                            struct ieee80211_sta *sta)
1084 {
1085         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1086         struct iwl_mvm_sta *mvmsta;
1087         struct iwl_device_cmd *dev_cmd;
1088         __le16 fc;
1089         u16 seq_number = 0;
1090         u8 tid = IWL_MAX_TID_COUNT;
1091         u16 txq_id = info->hw_queue;
1092         bool is_ampdu = false;
1093         int hdrlen;
1094
1095         mvmsta = iwl_mvm_sta_from_mac80211(sta);
1096         fc = hdr->frame_control;
1097         hdrlen = ieee80211_hdrlen(fc);
1098
1099         if (WARN_ON_ONCE(!mvmsta))
1100                 return -1;
1101
1102         if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA))
1103                 return -1;
1104
1105         if (unlikely(ieee80211_is_probe_resp(fc)))
1106                 iwl_mvm_probe_resp_set_noa(mvm, skb);
1107
1108         dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen,
1109                                         sta, mvmsta->sta_id);
1110         if (!dev_cmd)
1111                 goto drop;
1112
1113         /*
1114          * we handle that entirely ourselves -- for uAPSD the firmware
1115          * will always send a notification, and for PS-Poll responses
1116          * we'll notify mac80211 when getting frame status
1117          */
1118         info->flags &= ~IEEE80211_TX_STATUS_EOSP;
1119
1120         spin_lock(&mvmsta->lock);
1121
1122         /* nullfunc frames should go to the MGMT queue regardless of QOS,
1123          * the condition of !ieee80211_is_qos_nullfunc(fc) keeps the default
1124          * assignment of MGMT TID
1125          */
1126         if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
1127                 tid = ieee80211_get_tid(hdr);
1128                 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
1129                         goto drop_unlock_sta;
1130
1131                 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU;
1132                 if (WARN_ON_ONCE(is_ampdu &&
1133                                  mvmsta->tid_data[tid].state != IWL_AGG_ON))
1134                         goto drop_unlock_sta;
1135
1136                 seq_number = mvmsta->tid_data[tid].seq_number;
1137                 seq_number &= IEEE80211_SCTL_SEQ;
1138
1139                 if (!iwl_mvm_has_new_tx_api(mvm)) {
1140                         struct iwl_tx_cmd *tx_cmd = (void *)dev_cmd->payload;
1141
1142                         hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
1143                         hdr->seq_ctrl |= cpu_to_le16(seq_number);
1144                         /* update the tx_cmd hdr as it was already copied */
1145                         tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl;
1146                 }
1147         } else if (ieee80211_is_data(fc) && !ieee80211_is_data_qos(fc)) {
1148                 tid = IWL_TID_NON_QOS;
1149         }
1150
1151         txq_id = mvmsta->tid_data[tid].txq_id;
1152
1153         WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
1154
1155         /* Check if TXQ needs to be allocated or re-activated */
1156         if (unlikely(txq_id == IWL_MVM_INVALID_QUEUE)) {
1157                 iwl_mvm_tx_add_stream(mvm, mvmsta, tid, skb);
1158
1159                 /*
1160                  * The frame is now deferred, and the worker scheduled
1161                  * will re-allocate it, so we can free it for now.
1162                  */
1163                 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1164                 spin_unlock(&mvmsta->lock);
1165                 return 0;
1166         }
1167
1168         if (!iwl_mvm_has_new_tx_api(mvm)) {
1169                 /* Keep track of the time of the last frame for this RA/TID */
1170                 mvm->queue_info[txq_id].last_frame_time[tid] = jiffies;
1171
1172                 /*
1173                  * If we have timed-out TIDs - schedule the worker that will
1174                  * reconfig the queues and update them
1175                  *
1176                  * Note that the no lock is taken here in order to not serialize
1177                  * the TX flow. This isn't dangerous because scheduling
1178                  * mvm->add_stream_wk can't ruin the state, and if we DON'T
1179                  * schedule it due to some race condition then next TX we get
1180                  * here we will.
1181                  */
1182                 if (unlikely(mvm->queue_info[txq_id].status ==
1183                              IWL_MVM_QUEUE_SHARED &&
1184                              iwl_mvm_txq_should_update(mvm, txq_id)))
1185                         schedule_work(&mvm->add_stream_wk);
1186         }
1187
1188         IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id,
1189                      tid, txq_id, IEEE80211_SEQ_TO_SN(seq_number));
1190
1191         /* From now on, we cannot access info->control */
1192         iwl_mvm_skb_prepare_status(skb, dev_cmd);
1193
1194         if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id))
1195                 goto drop_unlock_sta;
1196
1197         if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc))
1198                 mvmsta->tid_data[tid].seq_number = seq_number + 0x10;
1199
1200         spin_unlock(&mvmsta->lock);
1201
1202         iwl_mvm_tx_pkt_queued(mvm, mvmsta, tid == IWL_MAX_TID_COUNT ? 0 : tid);
1203
1204         return 0;
1205
1206 drop_unlock_sta:
1207         iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1208         spin_unlock(&mvmsta->lock);
1209 drop:
1210         return -1;
1211 }
1212
1213 int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb,
1214                    struct ieee80211_sta *sta)
1215 {
1216         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1217         struct ieee80211_tx_info info;
1218         struct sk_buff_head mpdus_skbs;
1219         unsigned int payload_len;
1220         int ret;
1221
1222         if (WARN_ON_ONCE(!mvmsta))
1223                 return -1;
1224
1225         if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA))
1226                 return -1;
1227
1228         memcpy(&info, skb->cb, sizeof(info));
1229
1230         if (!skb_is_gso(skb))
1231                 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1232
1233         payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
1234                 tcp_hdrlen(skb) + skb->data_len;
1235
1236         if (payload_len <= skb_shinfo(skb)->gso_size)
1237                 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1238
1239         __skb_queue_head_init(&mpdus_skbs);
1240
1241         ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs);
1242         if (ret)
1243                 return ret;
1244
1245         if (WARN_ON(skb_queue_empty(&mpdus_skbs)))
1246                 return ret;
1247
1248         while (!skb_queue_empty(&mpdus_skbs)) {
1249                 skb = __skb_dequeue(&mpdus_skbs);
1250
1251                 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1252                 if (ret) {
1253                         __skb_queue_purge(&mpdus_skbs);
1254                         return ret;
1255                 }
1256         }
1257
1258         return 0;
1259 }
1260
1261 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm,
1262                                       struct ieee80211_sta *sta, u8 tid)
1263 {
1264         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1265         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1266         struct ieee80211_vif *vif = mvmsta->vif;
1267         u16 normalized_ssn;
1268
1269         lockdep_assert_held(&mvmsta->lock);
1270
1271         if ((tid_data->state == IWL_AGG_ON ||
1272              tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) &&
1273             iwl_mvm_tid_queued(mvm, tid_data) == 0) {
1274                 /*
1275                  * Now that this aggregation or DQA queue is empty tell
1276                  * mac80211 so it knows we no longer have frames buffered for
1277                  * the station on this TID (for the TIM bitmap calculation.)
1278                  */
1279                 ieee80211_sta_set_buffered(sta, tid, false);
1280         }
1281
1282         /*
1283          * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
1284          * to align the wrap around of ssn so we compare relevant values.
1285          */
1286         normalized_ssn = tid_data->ssn;
1287         if (mvm->trans->cfg->gen2)
1288                 normalized_ssn &= 0xff;
1289
1290         if (normalized_ssn != tid_data->next_reclaimed)
1291                 return;
1292
1293         switch (tid_data->state) {
1294         case IWL_EMPTYING_HW_QUEUE_ADDBA:
1295                 IWL_DEBUG_TX_QUEUES(mvm,
1296                                     "Can continue addBA flow ssn = next_recl = %d\n",
1297                                     tid_data->next_reclaimed);
1298                 tid_data->state = IWL_AGG_STARTING;
1299                 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1300                 break;
1301
1302         case IWL_EMPTYING_HW_QUEUE_DELBA:
1303                 IWL_DEBUG_TX_QUEUES(mvm,
1304                                     "Can continue DELBA flow ssn = next_recl = %d\n",
1305                                     tid_data->next_reclaimed);
1306                 tid_data->state = IWL_AGG_OFF;
1307                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1308                 break;
1309
1310         default:
1311                 break;
1312         }
1313 }
1314
1315 #ifdef CONFIG_IWLWIFI_DEBUG
1316 const char *iwl_mvm_get_tx_fail_reason(u32 status)
1317 {
1318 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
1319 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
1320
1321         switch (status & TX_STATUS_MSK) {
1322         case TX_STATUS_SUCCESS:
1323                 return "SUCCESS";
1324         TX_STATUS_POSTPONE(DELAY);
1325         TX_STATUS_POSTPONE(FEW_BYTES);
1326         TX_STATUS_POSTPONE(BT_PRIO);
1327         TX_STATUS_POSTPONE(QUIET_PERIOD);
1328         TX_STATUS_POSTPONE(CALC_TTAK);
1329         TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
1330         TX_STATUS_FAIL(SHORT_LIMIT);
1331         TX_STATUS_FAIL(LONG_LIMIT);
1332         TX_STATUS_FAIL(UNDERRUN);
1333         TX_STATUS_FAIL(DRAIN_FLOW);
1334         TX_STATUS_FAIL(RFKILL_FLUSH);
1335         TX_STATUS_FAIL(LIFE_EXPIRE);
1336         TX_STATUS_FAIL(DEST_PS);
1337         TX_STATUS_FAIL(HOST_ABORTED);
1338         TX_STATUS_FAIL(BT_RETRY);
1339         TX_STATUS_FAIL(STA_INVALID);
1340         TX_STATUS_FAIL(FRAG_DROPPED);
1341         TX_STATUS_FAIL(TID_DISABLE);
1342         TX_STATUS_FAIL(FIFO_FLUSHED);
1343         TX_STATUS_FAIL(SMALL_CF_POLL);
1344         TX_STATUS_FAIL(FW_DROP);
1345         TX_STATUS_FAIL(STA_COLOR_MISMATCH);
1346         }
1347
1348         return "UNKNOWN";
1349
1350 #undef TX_STATUS_FAIL
1351 #undef TX_STATUS_POSTPONE
1352 }
1353 #endif /* CONFIG_IWLWIFI_DEBUG */
1354
1355 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags,
1356                                enum nl80211_band band,
1357                                struct ieee80211_tx_rate *r)
1358 {
1359         if (rate_n_flags & RATE_HT_MCS_GF_MSK)
1360                 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
1361         switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
1362         case RATE_MCS_CHAN_WIDTH_20:
1363                 break;
1364         case RATE_MCS_CHAN_WIDTH_40:
1365                 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
1366                 break;
1367         case RATE_MCS_CHAN_WIDTH_80:
1368                 r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH;
1369                 break;
1370         case RATE_MCS_CHAN_WIDTH_160:
1371                 r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH;
1372                 break;
1373         }
1374         if (rate_n_flags & RATE_MCS_SGI_MSK)
1375                 r->flags |= IEEE80211_TX_RC_SHORT_GI;
1376         if (rate_n_flags & RATE_MCS_HT_MSK) {
1377                 r->flags |= IEEE80211_TX_RC_MCS;
1378                 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
1379         } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
1380                 ieee80211_rate_set_vht(
1381                         r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK,
1382                         ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
1383                                                 RATE_VHT_MCS_NSS_POS) + 1);
1384                 r->flags |= IEEE80211_TX_RC_VHT_MCS;
1385         } else {
1386                 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
1387                                                              band);
1388         }
1389 }
1390
1391 /**
1392  * translate ucode response to mac80211 tx status control values
1393  */
1394 static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags,
1395                                         struct ieee80211_tx_info *info)
1396 {
1397         struct ieee80211_tx_rate *r = &info->status.rates[0];
1398
1399         info->status.antenna =
1400                 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
1401         iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r);
1402 }
1403
1404 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm,
1405                                             u32 status)
1406 {
1407         struct iwl_fw_dbg_trigger_tlv *trig;
1408         struct iwl_fw_dbg_trigger_tx_status *status_trig;
1409         int i;
1410
1411         trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL,
1412                                      FW_DBG_TRIGGER_TX_STATUS);
1413         if (!trig)
1414                 return;
1415
1416         status_trig = (void *)trig->data;
1417
1418         for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) {
1419                 /* don't collect on status 0 */
1420                 if (!status_trig->statuses[i].status)
1421                         break;
1422
1423                 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK))
1424                         continue;
1425
1426                 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
1427                                         "Tx status %d was received",
1428                                         status & TX_STATUS_MSK);
1429                 break;
1430         }
1431 }
1432
1433 /**
1434  * iwl_mvm_get_scd_ssn - returns the SSN of the SCD
1435  * @tx_resp: the Tx response from the fw (agg or non-agg)
1436  *
1437  * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since
1438  * it can't know that everything will go well until the end of the AMPDU, it
1439  * can't know in advance the number of MPDUs that will be sent in the current
1440  * batch. This is why it writes the agg Tx response while it fetches the MPDUs.
1441  * Hence, it can't know in advance what the SSN of the SCD will be at the end
1442  * of the batch. This is why the SSN of the SCD is written at the end of the
1443  * whole struct at a variable offset. This function knows how to cope with the
1444  * variable offset and returns the SSN of the SCD.
1445  */
1446 static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm,
1447                                       struct iwl_mvm_tx_resp *tx_resp)
1448 {
1449         return le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) +
1450                             tx_resp->frame_count) & 0xfff;
1451 }
1452
1453 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm,
1454                                      struct iwl_rx_packet *pkt)
1455 {
1456         struct ieee80211_sta *sta;
1457         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1458         int txq_id = SEQ_TO_QUEUE(sequence);
1459         /* struct iwl_mvm_tx_resp_v3 is almost the same */
1460         struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1461         int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1462         int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1463         struct agg_tx_status *agg_status =
1464                 iwl_mvm_get_agg_status(mvm, tx_resp);
1465         u32 status = le16_to_cpu(agg_status->status);
1466         u16 ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp);
1467         struct sk_buff_head skbs;
1468         u8 skb_freed = 0;
1469         u8 lq_color;
1470         u16 next_reclaimed, seq_ctl;
1471         bool is_ndp = false;
1472
1473         __skb_queue_head_init(&skbs);
1474
1475         if (iwl_mvm_has_new_tx_api(mvm))
1476                 txq_id = le16_to_cpu(tx_resp->tx_queue);
1477
1478         seq_ctl = le16_to_cpu(tx_resp->seq_ctl);
1479
1480         /* we can free until ssn % q.n_bd not inclusive */
1481         iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs);
1482
1483         while (!skb_queue_empty(&skbs)) {
1484                 struct sk_buff *skb = __skb_dequeue(&skbs);
1485                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1486                 struct ieee80211_hdr *hdr = (void *)skb->data;
1487                 bool flushed = false;
1488
1489                 skb_freed++;
1490
1491                 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1492
1493                 memset(&info->status, 0, sizeof(info->status));
1494
1495                 /* inform mac80211 about what happened with the frame */
1496                 switch (status & TX_STATUS_MSK) {
1497                 case TX_STATUS_SUCCESS:
1498                 case TX_STATUS_DIRECT_DONE:
1499                         info->flags |= IEEE80211_TX_STAT_ACK;
1500                         break;
1501                 case TX_STATUS_FAIL_FIFO_FLUSHED:
1502                 case TX_STATUS_FAIL_DRAIN_FLOW:
1503                         flushed = true;
1504                         break;
1505                 case TX_STATUS_FAIL_DEST_PS:
1506                         /* the FW should have stopped the queue and not
1507                          * return this status
1508                          */
1509                         WARN_ON(1);
1510                         info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
1511                         break;
1512                 default:
1513                         break;
1514                 }
1515
1516                 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS &&
1517                     ieee80211_is_mgmt(hdr->frame_control))
1518                         iwl_mvm_toggle_tx_ant(mvm, &mvm->mgmt_last_antenna_idx);
1519
1520                 /*
1521                  * If we are freeing multiple frames, mark all the frames
1522                  * but the first one as acked, since they were acknowledged
1523                  * before
1524                  * */
1525                 if (skb_freed > 1)
1526                         info->flags |= IEEE80211_TX_STAT_ACK;
1527
1528                 iwl_mvm_tx_status_check_trigger(mvm, status);
1529
1530                 info->status.rates[0].count = tx_resp->failure_frame + 1;
1531                 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate),
1532                                             info);
1533                 info->status.status_driver_data[1] =
1534                         (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate);
1535
1536                 /* Single frame failure in an AMPDU queue => send BAR */
1537                 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
1538                     !(info->flags & IEEE80211_TX_STAT_ACK) &&
1539                     !(info->flags & IEEE80211_TX_STAT_TX_FILTERED) && !flushed)
1540                         info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1541                 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1542
1543                 /* W/A FW bug: seq_ctl is wrong upon failure / BAR frame */
1544                 if (ieee80211_is_back_req(hdr->frame_control))
1545                         seq_ctl = 0;
1546                 else if (status != TX_STATUS_SUCCESS)
1547                         seq_ctl = le16_to_cpu(hdr->seq_ctrl);
1548
1549                 if (unlikely(!seq_ctl)) {
1550                         struct ieee80211_hdr *hdr = (void *)skb->data;
1551
1552                         /*
1553                          * If it is an NDP, we can't update next_reclaim since
1554                          * its sequence control is 0. Note that for that same
1555                          * reason, NDPs are never sent to A-MPDU'able queues
1556                          * so that we can never have more than one freed frame
1557                          * for a single Tx resonse (see WARN_ON below).
1558                          */
1559                         if (ieee80211_is_qos_nullfunc(hdr->frame_control))
1560                                 is_ndp = true;
1561                 }
1562
1563                 /*
1564                  * TODO: this is not accurate if we are freeing more than one
1565                  * packet.
1566                  */
1567                 info->status.tx_time =
1568                         le16_to_cpu(tx_resp->wireless_media_time);
1569                 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1);
1570                 lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info);
1571                 info->status.status_driver_data[0] =
1572                         RS_DRV_DATA_PACK(lq_color, tx_resp->reduced_tpc);
1573
1574                 ieee80211_tx_status(mvm->hw, skb);
1575         }
1576
1577         /* This is an aggregation queue or might become one, so we use
1578          * the ssn since: ssn = wifi seq_num % 256.
1579          * The seq_ctl is the sequence control of the packet to which
1580          * this Tx response relates. But if there is a hole in the
1581          * bitmap of the BA we received, this Tx response may allow to
1582          * reclaim the hole and all the subsequent packets that were
1583          * already acked. In that case, seq_ctl != ssn, and the next
1584          * packet to be reclaimed will be ssn and not seq_ctl. In that
1585          * case, several packets will be reclaimed even if
1586          * frame_count = 1.
1587          *
1588          * The ssn is the index (% 256) of the latest packet that has
1589          * treated (acked / dropped) + 1.
1590          */
1591         next_reclaimed = ssn;
1592
1593         IWL_DEBUG_TX_REPLY(mvm,
1594                            "TXQ %d status %s (0x%08x)\n",
1595                            txq_id, iwl_mvm_get_tx_fail_reason(status), status);
1596
1597         IWL_DEBUG_TX_REPLY(mvm,
1598                            "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
1599                            le32_to_cpu(tx_resp->initial_rate),
1600                            tx_resp->failure_frame, SEQ_TO_INDEX(sequence),
1601                            ssn, next_reclaimed, seq_ctl);
1602
1603         rcu_read_lock();
1604
1605         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1606         /*
1607          * sta can't be NULL otherwise it'd mean that the sta has been freed in
1608          * the firmware while we still have packets for it in the Tx queues.
1609          */
1610         if (WARN_ON_ONCE(!sta))
1611                 goto out;
1612
1613         if (!IS_ERR(sta)) {
1614                 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1615
1616                 iwl_mvm_tx_airtime(mvm, mvmsta,
1617                                    le16_to_cpu(tx_resp->wireless_media_time));
1618
1619                 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS &&
1620                     mvmsta->sta_state < IEEE80211_STA_AUTHORIZED)
1621                         iwl_mvm_toggle_tx_ant(mvm, &mvmsta->tx_ant);
1622
1623                 if (sta->wme && tid != IWL_MGMT_TID) {
1624                         struct iwl_mvm_tid_data *tid_data =
1625                                 &mvmsta->tid_data[tid];
1626                         bool send_eosp_ndp = false;
1627
1628                         spin_lock_bh(&mvmsta->lock);
1629
1630                         if (!is_ndp) {
1631                                 tid_data->next_reclaimed = next_reclaimed;
1632                                 IWL_DEBUG_TX_REPLY(mvm,
1633                                                    "Next reclaimed packet:%d\n",
1634                                                    next_reclaimed);
1635                         } else {
1636                                 IWL_DEBUG_TX_REPLY(mvm,
1637                                                    "NDP - don't update next_reclaimed\n");
1638                         }
1639
1640                         iwl_mvm_check_ratid_empty(mvm, sta, tid);
1641
1642                         if (mvmsta->sleep_tx_count) {
1643                                 mvmsta->sleep_tx_count--;
1644                                 if (mvmsta->sleep_tx_count &&
1645                                     !iwl_mvm_tid_queued(mvm, tid_data)) {
1646                                         /*
1647                                          * The number of frames in the queue
1648                                          * dropped to 0 even if we sent less
1649                                          * frames than we thought we had on the
1650                                          * Tx queue.
1651                                          * This means we had holes in the BA
1652                                          * window that we just filled, ask
1653                                          * mac80211 to send EOSP since the
1654                                          * firmware won't know how to do that.
1655                                          * Send NDP and the firmware will send
1656                                          * EOSP notification that will trigger
1657                                          * a call to ieee80211_sta_eosp().
1658                                          */
1659                                         send_eosp_ndp = true;
1660                                 }
1661                         }
1662
1663                         spin_unlock_bh(&mvmsta->lock);
1664                         if (send_eosp_ndp) {
1665                                 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta,
1666                                         IEEE80211_FRAME_RELEASE_UAPSD,
1667                                         1, tid, false, false);
1668                                 mvmsta->sleep_tx_count = 0;
1669                                 ieee80211_send_eosp_nullfunc(sta, tid);
1670                         }
1671                 }
1672
1673                 if (mvmsta->next_status_eosp) {
1674                         mvmsta->next_status_eosp = false;
1675                         ieee80211_sta_eosp(sta);
1676                 }
1677         }
1678 out:
1679         rcu_read_unlock();
1680 }
1681
1682 #ifdef CONFIG_IWLWIFI_DEBUG
1683 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
1684 static const char *iwl_get_agg_tx_status(u16 status)
1685 {
1686         switch (status & AGG_TX_STATE_STATUS_MSK) {
1687         AGG_TX_STATE_(TRANSMITTED);
1688         AGG_TX_STATE_(UNDERRUN);
1689         AGG_TX_STATE_(BT_PRIO);
1690         AGG_TX_STATE_(FEW_BYTES);
1691         AGG_TX_STATE_(ABORT);
1692         AGG_TX_STATE_(TX_ON_AIR_DROP);
1693         AGG_TX_STATE_(LAST_SENT_TRY_CNT);
1694         AGG_TX_STATE_(LAST_SENT_BT_KILL);
1695         AGG_TX_STATE_(SCD_QUERY);
1696         AGG_TX_STATE_(TEST_BAD_CRC32);
1697         AGG_TX_STATE_(RESPONSE);
1698         AGG_TX_STATE_(DUMP_TX);
1699         AGG_TX_STATE_(DELAY_TX);
1700         }
1701
1702         return "UNKNOWN";
1703 }
1704
1705 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1706                                       struct iwl_rx_packet *pkt)
1707 {
1708         struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1709         struct agg_tx_status *frame_status =
1710                 iwl_mvm_get_agg_status(mvm, tx_resp);
1711         int i;
1712
1713         for (i = 0; i < tx_resp->frame_count; i++) {
1714                 u16 fstatus = le16_to_cpu(frame_status[i].status);
1715
1716                 IWL_DEBUG_TX_REPLY(mvm,
1717                                    "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
1718                                    iwl_get_agg_tx_status(fstatus),
1719                                    fstatus & AGG_TX_STATE_STATUS_MSK,
1720                                    (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >>
1721                                         AGG_TX_STATE_TRY_CNT_POS,
1722                                    le16_to_cpu(frame_status[i].sequence));
1723         }
1724 }
1725 #else
1726 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1727                                       struct iwl_rx_packet *pkt)
1728 {}
1729 #endif /* CONFIG_IWLWIFI_DEBUG */
1730
1731 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm,
1732                                   struct iwl_rx_packet *pkt)
1733 {
1734         struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1735         int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1736         int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1737         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1738         struct iwl_mvm_sta *mvmsta;
1739         int queue = SEQ_TO_QUEUE(sequence);
1740         struct ieee80211_sta *sta;
1741
1742         if (WARN_ON_ONCE(queue < IWL_MVM_DQA_MIN_DATA_QUEUE &&
1743                          (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)))
1744                 return;
1745
1746         iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt);
1747
1748         rcu_read_lock();
1749
1750         mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1751
1752         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1753         if (WARN_ON_ONCE(!sta || !sta->wme)) {
1754                 rcu_read_unlock();
1755                 return;
1756         }
1757
1758         if (!WARN_ON_ONCE(!mvmsta)) {
1759                 mvmsta->tid_data[tid].rate_n_flags =
1760                         le32_to_cpu(tx_resp->initial_rate);
1761                 mvmsta->tid_data[tid].tx_time =
1762                         le16_to_cpu(tx_resp->wireless_media_time);
1763                 mvmsta->tid_data[tid].lq_color =
1764                         TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info);
1765                 iwl_mvm_tx_airtime(mvm, mvmsta,
1766                                    le16_to_cpu(tx_resp->wireless_media_time));
1767         }
1768
1769         rcu_read_unlock();
1770 }
1771
1772 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1773 {
1774         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1775         struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1776
1777         if (tx_resp->frame_count == 1)
1778                 iwl_mvm_rx_tx_cmd_single(mvm, pkt);
1779         else
1780                 iwl_mvm_rx_tx_cmd_agg(mvm, pkt);
1781 }
1782
1783 static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid,
1784                                int txq, int index,
1785                                struct ieee80211_tx_info *ba_info, u32 rate)
1786 {
1787         struct sk_buff_head reclaimed_skbs;
1788         struct iwl_mvm_tid_data *tid_data;
1789         struct ieee80211_sta *sta;
1790         struct iwl_mvm_sta *mvmsta;
1791         struct sk_buff *skb;
1792         int freed;
1793
1794         if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT ||
1795                       tid > IWL_MAX_TID_COUNT,
1796                       "sta_id %d tid %d", sta_id, tid))
1797                 return;
1798
1799         rcu_read_lock();
1800
1801         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1802
1803         /* Reclaiming frames for a station that has been deleted ? */
1804         if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
1805                 rcu_read_unlock();
1806                 return;
1807         }
1808
1809         mvmsta = iwl_mvm_sta_from_mac80211(sta);
1810         tid_data = &mvmsta->tid_data[tid];
1811
1812         if (tid_data->txq_id != txq) {
1813                 IWL_ERR(mvm,
1814                         "invalid BA notification: Q %d, tid %d\n",
1815                         tid_data->txq_id, tid);
1816                 rcu_read_unlock();
1817                 return;
1818         }
1819
1820         __skb_queue_head_init(&reclaimed_skbs);
1821
1822         /*
1823          * Release all TFDs before the SSN, i.e. all TFDs in front of
1824          * block-ack window (we assume that they've been successfully
1825          * transmitted ... if not, it's too late anyway).
1826          */
1827         iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs);
1828
1829         spin_lock_bh(&mvmsta->lock);
1830
1831         tid_data->next_reclaimed = index;
1832
1833         iwl_mvm_check_ratid_empty(mvm, sta, tid);
1834
1835         freed = 0;
1836
1837         /* pack lq color from tid_data along the reduced txp */
1838         ba_info->status.status_driver_data[0] =
1839                 RS_DRV_DATA_PACK(tid_data->lq_color,
1840                                  ba_info->status.status_driver_data[0]);
1841         ba_info->status.status_driver_data[1] = (void *)(uintptr_t)rate;
1842
1843         skb_queue_walk(&reclaimed_skbs, skb) {
1844                 struct ieee80211_hdr *hdr = (void *)skb->data;
1845                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1846
1847                 if (ieee80211_is_data_qos(hdr->frame_control))
1848                         freed++;
1849                 else
1850                         WARN_ON_ONCE(tid != IWL_MAX_TID_COUNT);
1851
1852                 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1853
1854                 memset(&info->status, 0, sizeof(info->status));
1855                 /* Packet was transmitted successfully, failures come as single
1856                  * frames because before failing a frame the firmware transmits
1857                  * it without aggregation at least once.
1858                  */
1859                 info->flags |= IEEE80211_TX_STAT_ACK;
1860
1861                 /* this is the first skb we deliver in this batch */
1862                 /* put the rate scaling data there */
1863                 if (freed == 1) {
1864                         info->flags |= IEEE80211_TX_STAT_AMPDU;
1865                         memcpy(&info->status, &ba_info->status,
1866                                sizeof(ba_info->status));
1867                         iwl_mvm_hwrate_to_tx_status(rate, info);
1868                 }
1869         }
1870
1871         spin_unlock_bh(&mvmsta->lock);
1872
1873         /* We got a BA notif with 0 acked or scd_ssn didn't progress which is
1874          * possible (i.e. first MPDU in the aggregation wasn't acked)
1875          * Still it's important to update RS about sent vs. acked.
1876          */
1877         if (skb_queue_empty(&reclaimed_skbs)) {
1878                 struct ieee80211_chanctx_conf *chanctx_conf = NULL;
1879
1880                 if (mvmsta->vif)
1881                         chanctx_conf =
1882                                 rcu_dereference(mvmsta->vif->chanctx_conf);
1883
1884                 if (WARN_ON_ONCE(!chanctx_conf))
1885                         goto out;
1886
1887                 ba_info->band = chanctx_conf->def.chan->band;
1888                 iwl_mvm_hwrate_to_tx_status(rate, ba_info);
1889
1890                 if (!iwl_mvm_has_tlc_offload(mvm)) {
1891                         IWL_DEBUG_TX_REPLY(mvm,
1892                                            "No reclaim. Update rs directly\n");
1893                         iwl_mvm_rs_tx_status(mvm, sta, tid, ba_info, false);
1894                 }
1895         }
1896
1897 out:
1898         rcu_read_unlock();
1899
1900         while (!skb_queue_empty(&reclaimed_skbs)) {
1901                 skb = __skb_dequeue(&reclaimed_skbs);
1902                 ieee80211_tx_status(mvm->hw, skb);
1903         }
1904 }
1905
1906 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1907 {
1908         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1909         int sta_id, tid, txq, index;
1910         struct ieee80211_tx_info ba_info = {};
1911         struct iwl_mvm_ba_notif *ba_notif;
1912         struct iwl_mvm_tid_data *tid_data;
1913         struct iwl_mvm_sta *mvmsta;
1914
1915         ba_info.flags = IEEE80211_TX_STAT_AMPDU;
1916
1917         if (iwl_mvm_has_new_tx_api(mvm)) {
1918                 struct iwl_mvm_compressed_ba_notif *ba_res =
1919                         (void *)pkt->data;
1920                 u8 lq_color = TX_RES_RATE_TABLE_COL_GET(ba_res->tlc_rate_info);
1921                 int i;
1922
1923                 sta_id = ba_res->sta_id;
1924                 ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done);
1925                 ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed);
1926                 ba_info.status.tx_time =
1927                         (u16)le32_to_cpu(ba_res->wireless_time);
1928                 ba_info.status.status_driver_data[0] =
1929                         (void *)(uintptr_t)ba_res->reduced_txp;
1930
1931                 if (!le16_to_cpu(ba_res->tfd_cnt))
1932                         goto out;
1933
1934                 rcu_read_lock();
1935
1936                 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1937                 if (!mvmsta)
1938                         goto out_unlock;
1939
1940                 /* Free per TID */
1941                 for (i = 0; i < le16_to_cpu(ba_res->tfd_cnt); i++) {
1942                         struct iwl_mvm_compressed_ba_tfd *ba_tfd =
1943                                 &ba_res->tfd[i];
1944
1945                         tid = ba_tfd->tid;
1946                         if (tid == IWL_MGMT_TID)
1947                                 tid = IWL_MAX_TID_COUNT;
1948
1949                         mvmsta->tid_data[i].lq_color = lq_color;
1950                         iwl_mvm_tx_reclaim(mvm, sta_id, tid,
1951                                            (int)(le16_to_cpu(ba_tfd->q_num)),
1952                                            le16_to_cpu(ba_tfd->tfd_index),
1953                                            &ba_info,
1954                                            le32_to_cpu(ba_res->tx_rate));
1955                 }
1956
1957                 iwl_mvm_tx_airtime(mvm, mvmsta,
1958                                    le32_to_cpu(ba_res->wireless_time));
1959 out_unlock:
1960                 rcu_read_unlock();
1961 out:
1962                 IWL_DEBUG_TX_REPLY(mvm,
1963                                    "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n",
1964                                    sta_id, le32_to_cpu(ba_res->flags),
1965                                    le16_to_cpu(ba_res->txed),
1966                                    le16_to_cpu(ba_res->done));
1967                 return;
1968         }
1969
1970         ba_notif = (void *)pkt->data;
1971         sta_id = ba_notif->sta_id;
1972         tid = ba_notif->tid;
1973         /* "flow" corresponds to Tx queue */
1974         txq = le16_to_cpu(ba_notif->scd_flow);
1975         /* "ssn" is start of block-ack Tx window, corresponds to index
1976          * (in Tx queue's circular buffer) of first TFD/frame in window */
1977         index = le16_to_cpu(ba_notif->scd_ssn);
1978
1979         rcu_read_lock();
1980         mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1981         if (WARN_ON_ONCE(!mvmsta)) {
1982                 rcu_read_unlock();
1983                 return;
1984         }
1985
1986         tid_data = &mvmsta->tid_data[tid];
1987
1988         ba_info.status.ampdu_ack_len = ba_notif->txed_2_done;
1989         ba_info.status.ampdu_len = ba_notif->txed;
1990         ba_info.status.tx_time = tid_data->tx_time;
1991         ba_info.status.status_driver_data[0] =
1992                 (void *)(uintptr_t)ba_notif->reduced_txp;
1993
1994         rcu_read_unlock();
1995
1996         iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info,
1997                            tid_data->rate_n_flags);
1998
1999         IWL_DEBUG_TX_REPLY(mvm,
2000                            "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
2001                            ba_notif->sta_addr, ba_notif->sta_id);
2002
2003         IWL_DEBUG_TX_REPLY(mvm,
2004                            "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
2005                            ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl),
2006                            le64_to_cpu(ba_notif->bitmap), txq, index,
2007                            ba_notif->txed, ba_notif->txed_2_done);
2008
2009         IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n",
2010                            ba_notif->reduced_txp);
2011 }
2012
2013 /*
2014  * Note that there are transports that buffer frames before they reach
2015  * the firmware. This means that after flush_tx_path is called, the
2016  * queue might not be empty. The race-free way to handle this is to:
2017  * 1) set the station as draining
2018  * 2) flush the Tx path
2019  * 3) wait for the transport queues to be empty
2020  */
2021 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, u32 flags)
2022 {
2023         int ret;
2024         struct iwl_tx_path_flush_cmd_v1 flush_cmd = {
2025                 .queues_ctl = cpu_to_le32(tfd_msk),
2026                 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH),
2027         };
2028
2029         WARN_ON(iwl_mvm_has_new_tx_api(mvm));
2030
2031         ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags,
2032                                    sizeof(flush_cmd), &flush_cmd);
2033         if (ret)
2034                 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
2035         return ret;
2036 }
2037
2038 int iwl_mvm_flush_sta_tids(struct iwl_mvm *mvm, u32 sta_id,
2039                            u16 tids, u32 flags)
2040 {
2041         int ret;
2042         struct iwl_tx_path_flush_cmd flush_cmd = {
2043                 .sta_id = cpu_to_le32(sta_id),
2044                 .tid_mask = cpu_to_le16(tids),
2045         };
2046
2047         WARN_ON(!iwl_mvm_has_new_tx_api(mvm));
2048
2049         ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags,
2050                                    sizeof(flush_cmd), &flush_cmd);
2051         if (ret)
2052                 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
2053         return ret;
2054 }
2055
2056 int iwl_mvm_flush_sta(struct iwl_mvm *mvm, void *sta, bool internal, u32 flags)
2057 {
2058         struct iwl_mvm_int_sta *int_sta = sta;
2059         struct iwl_mvm_sta *mvm_sta = sta;
2060
2061         BUILD_BUG_ON(offsetof(struct iwl_mvm_int_sta, sta_id) !=
2062                      offsetof(struct iwl_mvm_sta, sta_id));
2063
2064         if (iwl_mvm_has_new_tx_api(mvm))
2065                 return iwl_mvm_flush_sta_tids(mvm, mvm_sta->sta_id,
2066                                               0xff | BIT(IWL_MGMT_TID), flags);
2067
2068         if (internal)
2069                 return iwl_mvm_flush_tx_path(mvm, int_sta->tfd_queue_msk,
2070                                              flags);
2071
2072         return iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, flags);
2073 }