drivers/net/wireless/iwlwifi/mvm/bt-coex.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) 2013 Intel Corporation. All rights reserved.
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of version 2 of the GNU General Public License as
  12  * published by the Free Software Foundation.
  13  *
  14  * This program is distributed in the hope that it will be useful, but
  15  * WITHOUT ANY WARRANTY; without even the implied warranty of
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  20  * along with this program; if not, write to the Free Software
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  32  *
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  44  *    the documentation and/or other materials provided with the
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  47  *    contributors may be used to endorse or promote products derived
  48  *    from this software without specific prior written permission.
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  50  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  51  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  52  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  53  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  54  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  55  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  56  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  57  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  58  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  59  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  60  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  61  *
  62  *****************************************************************************/
  63
  64 #include <net/mac80211.h>
  65
  66 #include "fw-api-bt-coex.h"
  67 #include "iwl-modparams.h"
  68 #include "mvm.h"
  69 #include "iwl-debug.h"
  70
  71 #define EVENT_PRIO_ANT(_evt, _prio, _shrd_ant)                  \
  72         [(_evt)] = (((_prio) << BT_COEX_PRIO_TBL_PRIO_POS) |    \
  73                    ((_shrd_ant) << BT_COEX_PRIO_TBL_SHRD_ANT_POS))
  74
  75 static const u8 iwl_bt_prio_tbl[BT_COEX_PRIO_TBL_EVT_MAX] = {
  76         EVENT_PRIO_ANT(BT_COEX_PRIO_TBL_EVT_INIT_CALIB1,
  77                        BT_COEX_PRIO_TBL_PRIO_BYPASS, 0),
  78         EVENT_PRIO_ANT(BT_COEX_PRIO_TBL_EVT_INIT_CALIB2,
  79                        BT_COEX_PRIO_TBL_PRIO_BYPASS, 1),
  80         EVENT_PRIO_ANT(BT_COEX_PRIO_TBL_EVT_PERIODIC_CALIB_LOW1,
  81                        BT_COEX_PRIO_TBL_PRIO_LOW, 0),
  82         EVENT_PRIO_ANT(BT_COEX_PRIO_TBL_EVT_PERIODIC_CALIB_LOW2,
  83                        BT_COEX_PRIO_TBL_PRIO_LOW, 1),
  84         EVENT_PRIO_ANT(BT_COEX_PRIO_TBL_EVT_PERIODIC_CALIB_HIGH1,
  85                        BT_COEX_PRIO_TBL_PRIO_HIGH, 0),
  86         EVENT_PRIO_ANT(BT_COEX_PRIO_TBL_EVT_PERIODIC_CALIB_HIGH2,
  87                        BT_COEX_PRIO_TBL_PRIO_HIGH, 1),
  88         EVENT_PRIO_ANT(BT_COEX_PRIO_TBL_EVT_DTIM,
  89                        BT_COEX_PRIO_TBL_DISABLED, 0),
  90         EVENT_PRIO_ANT(BT_COEX_PRIO_TBL_EVT_SCAN52,
  91                        BT_COEX_PRIO_TBL_PRIO_COEX_OFF, 0),
  92         EVENT_PRIO_ANT(BT_COEX_PRIO_TBL_EVT_SCAN24,
  93                        BT_COEX_PRIO_TBL_PRIO_COEX_ON, 0),
  94         EVENT_PRIO_ANT(BT_COEX_PRIO_TBL_EVT_IDLE,
  95                        BT_COEX_PRIO_TBL_PRIO_COEX_IDLE, 0),
  96         0, 0, 0, 0, 0, 0,
  97 };
  98
  99 #undef EVENT_PRIO_ANT
 100
 101 #define BT_ENABLE_REDUCED_TXPOWER_THRESHOLD     (-62)
 102 #define BT_DISABLE_REDUCED_TXPOWER_THRESHOLD    (-65)
 103 #define BT_ANTENNA_COUPLING_THRESHOLD           (30)
 104
 105 int iwl_send_bt_prio_tbl(struct iwl_mvm *mvm)
 106 {
 107         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_NEWBT_COEX))
 108                 return 0;
 109
 110         return iwl_mvm_send_cmd_pdu(mvm, BT_COEX_PRIO_TABLE, CMD_SYNC,
 111                                     sizeof(struct iwl_bt_coex_prio_tbl_cmd),
 112                                     &iwl_bt_prio_tbl);
 113 }
 114
 115 const u32 iwl_bt_ack_kill_msk[BT_KILL_MSK_MAX] = {
 116         [BT_KILL_MSK_DEFAULT] = 0xffff0000,
 117         [BT_KILL_MSK_SCO_HID_A2DP] = 0xffffffff,
 118         [BT_KILL_MSK_REDUCED_TXPOW] = 0,
 119 };
 120
 121 const u32 iwl_bt_cts_kill_msk[BT_KILL_MSK_MAX] = {
 122         [BT_KILL_MSK_DEFAULT] = 0xffff0000,
 123         [BT_KILL_MSK_SCO_HID_A2DP] = 0xffffffff,
 124         [BT_KILL_MSK_REDUCED_TXPOW] = 0,
 125 };
 126
 127 static const __le32 iwl_bt_prio_boost[BT_COEX_BOOST_SIZE] = {
 128         cpu_to_le32(0xf0f0f0f0),
 129         cpu_to_le32(0xc0c0c0c0),
 130         cpu_to_le32(0xfcfcfcfc),
 131         cpu_to_le32(0xff00ff00),
 132 };
 133
 134 static const __le32 iwl_combined_lookup[BT_COEX_MAX_LUT][BT_COEX_LUT_SIZE] = {
 135         {
 136                 /* Tight */
 137                 cpu_to_le32(0xaaaaaaaa),
 138                 cpu_to_le32(0xaaaaaaaa),
 139                 cpu_to_le32(0xaeaaaaaa),
 140                 cpu_to_le32(0xaaaaaaaa),
 141                 cpu_to_le32(0xcc00ff28),
 142                 cpu_to_le32(0x0000aaaa),
 143                 cpu_to_le32(0xcc00aaaa),
 144                 cpu_to_le32(0x0000aaaa),
 145                 cpu_to_le32(0xc0004000),
 146                 cpu_to_le32(0x00000000),
 147                 cpu_to_le32(0xf0005000),
 148                 cpu_to_le32(0xf0005000),
 149         },
 150         {
 151                 /* Loose */
 152                 cpu_to_le32(0xaaaaaaaa),
 153                 cpu_to_le32(0xaaaaaaaa),
 154                 cpu_to_le32(0xaaaaaaaa),
 155                 cpu_to_le32(0xaaaaaaaa),
 156                 cpu_to_le32(0xcc00ff28),
 157                 cpu_to_le32(0x0000aaaa),
 158                 cpu_to_le32(0xcc00aaaa),
 159                 cpu_to_le32(0x0000aaaa),
 160                 cpu_to_le32(0x00000000),
 161                 cpu_to_le32(0x00000000),
 162                 cpu_to_le32(0xf0005000),
 163                 cpu_to_le32(0xf0005000),
 164         },
 165         {
 166                 /* Tx Tx disabled */
 167                 cpu_to_le32(0xaaaaaaaa),
 168                 cpu_to_le32(0xaaaaaaaa),
 169                 cpu_to_le32(0xaaaaaaaa),
 170                 cpu_to_le32(0xaaaaaaaa),
 171                 cpu_to_le32(0xcc00ff28),
 172                 cpu_to_le32(0x0000aaaa),
 173                 cpu_to_le32(0xcc00aaaa),
 174                 cpu_to_le32(0x0000aaaa),
 175                 cpu_to_le32(0xC0004000),
 176                 cpu_to_le32(0xC0004000),
 177                 cpu_to_le32(0xF0005000),
 178                 cpu_to_le32(0xF0005000),
 179         },
 180 };
 181
 182 /* 20MHz / 40MHz below / 40Mhz above*/
 183 static const __le64 iwl_ci_mask[][3] = {
 184         /* dummy entry for channel 0 */
 185         {cpu_to_le64(0), cpu_to_le64(0), cpu_to_le64(0)},
 186         {
 187                 cpu_to_le64(0x0000001FFFULL),
 188                 cpu_to_le64(0x0ULL),
 189                 cpu_to_le64(0x00007FFFFFULL),
 190         },
 191         {
 192                 cpu_to_le64(0x000000FFFFULL),
 193                 cpu_to_le64(0x0ULL),
 194                 cpu_to_le64(0x0003FFFFFFULL),
 195         },
 196         {
 197                 cpu_to_le64(0x000003FFFCULL),
 198                 cpu_to_le64(0x0ULL),
 199                 cpu_to_le64(0x000FFFFFFCULL),
 200         },
 201         {
 202                 cpu_to_le64(0x00001FFFE0ULL),
 203                 cpu_to_le64(0x0ULL),
 204                 cpu_to_le64(0x007FFFFFE0ULL),
 205         },
 206         {
 207                 cpu_to_le64(0x00007FFF80ULL),
 208                 cpu_to_le64(0x00007FFFFFULL),
 209                 cpu_to_le64(0x01FFFFFF80ULL),
 210         },
 211         {
 212                 cpu_to_le64(0x0003FFFC00ULL),
 213                 cpu_to_le64(0x0003FFFFFFULL),
 214                 cpu_to_le64(0x0FFFFFFC00ULL),
 215         },
 216         {
 217                 cpu_to_le64(0x000FFFF000ULL),
 218                 cpu_to_le64(0x000FFFFFFCULL),
 219                 cpu_to_le64(0x3FFFFFF000ULL),
 220         },
 221         {
 222                 cpu_to_le64(0x007FFF8000ULL),
 223                 cpu_to_le64(0x007FFFFFE0ULL),
 224                 cpu_to_le64(0xFFFFFF8000ULL),
 225         },
 226         {
 227                 cpu_to_le64(0x01FFFE0000ULL),
 228                 cpu_to_le64(0x01FFFFFF80ULL),
 229                 cpu_to_le64(0xFFFFFE0000ULL),
 230         },
 231         {
 232                 cpu_to_le64(0x0FFFF00000ULL),
 233                 cpu_to_le64(0x0FFFFFFC00ULL),
 234                 cpu_to_le64(0x0ULL),
 235         },
 236         {
 237                 cpu_to_le64(0x3FFFC00000ULL),
 238                 cpu_to_le64(0x3FFFFFF000ULL),
 239                 cpu_to_le64(0x0)
 240         },
 241         {
 242                 cpu_to_le64(0xFFFE000000ULL),
 243                 cpu_to_le64(0xFFFFFF8000ULL),
 244                 cpu_to_le64(0x0)
 245         },
 246         {
 247                 cpu_to_le64(0xFFF8000000ULL),
 248                 cpu_to_le64(0xFFFFFE0000ULL),
 249                 cpu_to_le64(0x0)
 250         },
 251         {
 252                 cpu_to_le64(0xFE00000000ULL),
 253                 cpu_to_le64(0x0ULL),
 254                 cpu_to_le64(0x0)
 255         },
 256 };
 257
 258 static const __le32 iwl_bt_mprio_lut[BT_COEX_MULTI_PRIO_LUT_SIZE] = {
 259         cpu_to_le32(0x22002200),
 260         cpu_to_le32(0x33113311),
 261 };
 262
 263 static enum iwl_bt_coex_lut_type
 264 iwl_get_coex_type(struct iwl_mvm *mvm, const struct ieee80211_vif *vif)
 265 {
 266         struct ieee80211_chanctx_conf *chanctx_conf;
 267         enum iwl_bt_coex_lut_type ret;
 268         u16 phy_ctx_id;
 269
 270         lockdep_assert_held(&mvm->mutex);
 271
 272         rcu_read_lock();
 273
 274         chanctx_conf = rcu_dereference(vif->chanctx_conf);
 275
 276         if (!chanctx_conf ||
 277              chanctx_conf->def.chan->band != IEEE80211_BAND_2GHZ) {
 278                 rcu_read_unlock();
 279                 return BT_COEX_LOOSE_LUT;
 280         }
 281
 282         ret = BT_COEX_TX_DIS_LUT;
 283
 284         if (mvm->cfg->bt_shared_single_ant) {
 285                 rcu_read_unlock();
 286                 return ret;
 287         }
 288
 289         phy_ctx_id = *((u16 *)chanctx_conf->drv_priv);
 290
 291         if (mvm->last_bt_ci_cmd.primary_ch_phy_id == phy_ctx_id)
 292                 ret = le32_to_cpu(mvm->last_bt_notif.primary_ch_lut);
 293         else if (mvm->last_bt_ci_cmd.secondary_ch_phy_id == phy_ctx_id)
 294                 ret = le32_to_cpu(mvm->last_bt_notif.secondary_ch_lut);
 295         /* else - default = TX TX disallowed */
 296
 297         rcu_read_unlock();
 298
 299         return ret;
 300 }
 301
 302 int iwl_send_bt_init_conf(struct iwl_mvm *mvm)
 303 {
 304         struct iwl_bt_coex_cmd *bt_cmd;
 305         struct iwl_host_cmd cmd = {
 306                 .id = BT_CONFIG,
 307                 .len = { sizeof(*bt_cmd), },
 308                 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
 309                 .flags = CMD_SYNC,
 310         };
 311         int ret;
 312         u32 flags;
 313
 314         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_NEWBT_COEX))
 315                 return 0;
 316
 317         bt_cmd = kzalloc(sizeof(*bt_cmd), GFP_KERNEL);
 318         if (!bt_cmd)
 319                 return -ENOMEM;
 320         cmd.data[0] = bt_cmd;
 321
 322         bt_cmd->max_kill = 5;
 323         bt_cmd->bt4_antenna_isolation_thr = BT_ANTENNA_COUPLING_THRESHOLD,
 324         bt_cmd->bt4_antenna_isolation = iwlwifi_mod_params.ant_coupling,
 325         bt_cmd->bt4_tx_tx_delta_freq_thr = 15,
 326         bt_cmd->bt4_tx_rx_max_freq0 = 15,
 327
 328         flags = iwlwifi_mod_params.bt_coex_active ?
 329                         BT_COEX_NW : BT_COEX_DISABLE;
 330         flags |= BT_CH_PRIMARY_EN | BT_CH_SECONDARY_EN | BT_SYNC_2_BT_DISABLE;
 331         bt_cmd->flags = cpu_to_le32(flags);
 332
 333         bt_cmd->valid_bit_msk = cpu_to_le32(BT_VALID_ENABLE |
 334                                             BT_VALID_BT_PRIO_BOOST |
 335                                             BT_VALID_MAX_KILL |
 336                                             BT_VALID_3W_TMRS |
 337                                             BT_VALID_KILL_ACK |
 338                                             BT_VALID_KILL_CTS |
 339                                             BT_VALID_REDUCED_TX_POWER |
 340                                             BT_VALID_LUT |
 341                                             BT_VALID_WIFI_RX_SW_PRIO_BOOST |
 342                                             BT_VALID_WIFI_TX_SW_PRIO_BOOST |
 343                                             BT_VALID_MULTI_PRIO_LUT |
 344                                             BT_VALID_CORUN_LUT_20 |
 345                                             BT_VALID_CORUN_LUT_40 |
 346                                             BT_VALID_ANT_ISOLATION |
 347                                             BT_VALID_ANT_ISOLATION_THRS |
 348                                             BT_VALID_TXTX_DELTA_FREQ_THRS |
 349                                             BT_VALID_TXRX_MAX_FREQ_0);
 350
 351         memcpy(&bt_cmd->decision_lut, iwl_combined_lookup,
 352                sizeof(iwl_combined_lookup));
 353         memcpy(&bt_cmd->bt_prio_boost, iwl_bt_prio_boost,
 354                sizeof(iwl_bt_prio_boost));
 355         memcpy(&bt_cmd->bt4_multiprio_lut, iwl_bt_mprio_lut,
 356                sizeof(iwl_bt_mprio_lut));
 357         bt_cmd->kill_ack_msk =
 358                 cpu_to_le32(iwl_bt_ack_kill_msk[BT_KILL_MSK_DEFAULT]);
 359         bt_cmd->kill_cts_msk =
 360                 cpu_to_le32(iwl_bt_cts_kill_msk[BT_KILL_MSK_DEFAULT]);
 361
 362         memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif));
 363         memset(&mvm->last_bt_ci_cmd, 0, sizeof(mvm->last_bt_ci_cmd));
 364
 365         ret = iwl_mvm_send_cmd(mvm, &cmd);
 366
 367         kfree(bt_cmd);
 368         return ret;
 369 }
 370
 371 static int iwl_mvm_bt_udpate_ctrl_kill_msk(struct iwl_mvm *mvm,
 372                                            bool reduced_tx_power)
 373 {
 374         enum iwl_bt_kill_msk bt_kill_msk;
 375         struct iwl_bt_coex_cmd *bt_cmd;
 376         struct iwl_bt_coex_profile_notif *notif = &mvm->last_bt_notif;
 377         struct iwl_host_cmd cmd = {
 378                 .id = BT_CONFIG,
 379                 .data[0] = &bt_cmd,
 380                 .len = { sizeof(*bt_cmd), },
 381                 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
 382                 .flags = CMD_SYNC,
 383         };
 384         int ret = 0;
 385
 386         lockdep_assert_held(&mvm->mutex);
 387
 388         if (reduced_tx_power) {
 389                 /* Reduced Tx power has precedence on the type of the profile */
 390                 bt_kill_msk = BT_KILL_MSK_REDUCED_TXPOW;
 391         } else {
 392                 /* Low latency BT profile is active: give higher prio to BT */
 393                 if (BT_MBOX_MSG(notif, 3, SCO_STATE)  ||
 394                     BT_MBOX_MSG(notif, 3, A2DP_STATE) ||
 395                     BT_MBOX_MSG(notif, 3, SNIFF_STATE))
 396                         bt_kill_msk = BT_KILL_MSK_SCO_HID_A2DP;
 397                 else
 398                         bt_kill_msk = BT_KILL_MSK_DEFAULT;
 399         }
 400
 401         IWL_DEBUG_COEX(mvm,
 402                        "Update kill_msk: %d - SCO %sactive A2DP %sactive SNIFF %sactive\n",
 403                        bt_kill_msk,
 404                        BT_MBOX_MSG(notif, 3, SCO_STATE) ? "" : "in",
 405                        BT_MBOX_MSG(notif, 3, A2DP_STATE) ? "" : "in",
 406                        BT_MBOX_MSG(notif, 3, SNIFF_STATE) ? "" : "in");
 407
 408         /* Don't send HCMD if there is no update */
 409         if (bt_kill_msk == mvm->bt_kill_msk)
 410                 return 0;
 411
 412         mvm->bt_kill_msk = bt_kill_msk;
 413
 414         bt_cmd = kzalloc(sizeof(*bt_cmd), GFP_KERNEL);
 415         if (!bt_cmd)
 416                 return -ENOMEM;
 417         cmd.data[0] = bt_cmd;
 418
 419         bt_cmd->kill_ack_msk = cpu_to_le32(iwl_bt_ack_kill_msk[bt_kill_msk]);
 420         bt_cmd->kill_cts_msk = cpu_to_le32(iwl_bt_cts_kill_msk[bt_kill_msk]);
 421         bt_cmd->valid_bit_msk =
 422                 cpu_to_le32(BT_VALID_KILL_ACK | BT_VALID_KILL_CTS);
 423
 424         IWL_DEBUG_COEX(mvm, "ACK Kill msk = 0x%08x, CTS Kill msk = 0x%08x\n",
 425                        iwl_bt_ack_kill_msk[bt_kill_msk],
 426                        iwl_bt_cts_kill_msk[bt_kill_msk]);
 427
 428         ret = iwl_mvm_send_cmd(mvm, &cmd);
 429
 430         kfree(bt_cmd);
 431         return ret;
 432 }
 433
 434 static int iwl_mvm_bt_coex_reduced_txp(struct iwl_mvm *mvm, u8 sta_id,
 435                                        bool enable)
 436 {
 437         struct iwl_bt_coex_cmd *bt_cmd;
 438         /* Send ASYNC since this can be sent from an atomic context */
 439         struct iwl_host_cmd cmd = {
 440                 .id = BT_CONFIG,
 441                 .len = { sizeof(*bt_cmd), },
 442                 .dataflags = { IWL_HCMD_DFL_DUP, },
 443                 .flags = CMD_ASYNC,
 444         };
 445
 446         struct ieee80211_sta *sta;
 447         struct iwl_mvm_sta *mvmsta;
 448         int ret;
 449
 450         /* This can happen if the station has been removed right now */
 451         if (sta_id == IWL_MVM_STATION_COUNT)
 452                 return 0;
 453
 454         sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
 455                                         lockdep_is_held(&mvm->mutex));
 456         mvmsta = (void *)sta->drv_priv;
 457
 458         /* nothing to do */
 459         if (mvmsta->bt_reduced_txpower == enable)
 460                 return 0;
 461
 462         bt_cmd = kzalloc(sizeof(*bt_cmd), GFP_ATOMIC);
 463         if (!bt_cmd)
 464                 return -ENOMEM;
 465         cmd.data[0] = bt_cmd;
 466
 467         bt_cmd->valid_bit_msk = cpu_to_le32(BT_VALID_REDUCED_TX_POWER),
 468         bt_cmd->bt_reduced_tx_power = sta_id;
 469
 470         if (enable)
 471                 bt_cmd->bt_reduced_tx_power |= BT_REDUCED_TX_POWER_BIT;
 472
 473         IWL_DEBUG_COEX(mvm, "%sable reduced Tx Power for sta %d\n",
 474                        enable ? "en" : "dis", sta_id);
 475
 476         mvmsta->bt_reduced_txpower = enable;
 477
 478         ret = iwl_mvm_send_cmd(mvm, &cmd);
 479
 480         kfree(bt_cmd);
 481         return ret;
 482 }
 483
 484 struct iwl_bt_iterator_data {
 485         struct iwl_bt_coex_profile_notif *notif;
 486         struct iwl_mvm *mvm;
 487         u32 num_bss_ifaces;
 488         bool reduced_tx_power;
 489         struct ieee80211_chanctx_conf *primary;
 490         struct ieee80211_chanctx_conf *secondary;
 491 };
 492
 493 /* must be called under rcu_read_lock */
 494 static void iwl_mvm_bt_notif_iterator(void *_data, u8 *mac,
 495                                       struct ieee80211_vif *vif)
 496 {
 497         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 498         struct iwl_bt_iterator_data *data = _data;
 499         struct iwl_mvm *mvm = data->mvm;
 500         struct ieee80211_chanctx_conf *chanctx_conf;
 501         enum ieee80211_smps_mode smps_mode;
 502         int ave_rssi;
 503
 504         lockdep_assert_held(&mvm->mutex);
 505
 506         if (vif->type != NL80211_IFTYPE_STATION &&
 507             vif->type != NL80211_IFTYPE_AP)
 508                 return;
 509
 510         smps_mode = IEEE80211_SMPS_AUTOMATIC;
 511
 512         chanctx_conf = rcu_dereference(vif->chanctx_conf);
 513
 514         /* If channel context is invalid or not on 2.4GHz .. */
 515         if ((!chanctx_conf ||
 516              chanctx_conf->def.chan->band != IEEE80211_BAND_2GHZ)) {
 517                 /* ... and it is an associated STATION, relax constraints */
 518                 if (vif->type == NL80211_IFTYPE_STATION && vif->bss_conf.assoc)
 519                         iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_BT_COEX,
 520                                             smps_mode);
 521                 return;
 522         }
 523
 524         /* SoftAP / GO will always be primary */
 525         if (vif->type == NL80211_IFTYPE_AP) {
 526                 if (!mvmvif->ap_active)
 527                         return;
 528
 529                 /* the Ack / Cts kill mask must be default if AP / GO */
 530                 data->reduced_tx_power = false;
 531
 532                 if (chanctx_conf == data->primary)
 533                         return;
 534
 535                 /* downgrade the current primary no matter what its type is */
 536                 data->secondary = data->primary;
 537                 data->primary = chanctx_conf;
 538                 return;
 539         }
 540
 541         data->num_bss_ifaces++;
 542
 543         /* we are now a STA / P2P Client, and take associated ones only */
 544         if (!vif->bss_conf.assoc)
 545                 return;
 546
 547         /* STA / P2P Client, try to be primary if first vif */
 548         if (!data->primary || data->primary == chanctx_conf)
 549                 data->primary = chanctx_conf;
 550         else if (!data->secondary)
 551                 /* if secondary is not NULL, it might be a GO */
 552                 data->secondary = chanctx_conf;
 553
 554         if (data->notif->bt_status)
 555                 smps_mode = IEEE80211_SMPS_DYNAMIC;
 556
 557         if (le32_to_cpu(data->notif->bt_activity_grading) >= BT_LOW_TRAFFIC)
 558                 smps_mode = IEEE80211_SMPS_STATIC;
 559
 560         IWL_DEBUG_COEX(data->mvm,
 561                        "mac %d: bt_status %d bt_activity_grading %d smps_req %d\n",
 562                        mvmvif->id,  data->notif->bt_status,
 563                        data->notif->bt_activity_grading, smps_mode);
 564
 565         iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_BT_COEX, smps_mode);
 566
 567         /* don't reduce the Tx power if in loose scheme */
 568         if (iwl_get_coex_type(mvm, vif) == BT_COEX_LOOSE_LUT ||
 569             mvm->cfg->bt_shared_single_ant) {
 570                 data->reduced_tx_power = false;
 571                 return;
 572         }
 573
 574         /* reduced Txpower only if BT is on, so ...*/
 575         if (le32_to_cpu(data->notif->bt_activity_grading) == BT_OFF) {
 576                 /* ... cancel reduced Tx power ... */
 577                 if (iwl_mvm_bt_coex_reduced_txp(mvm, mvmvif->ap_sta_id, false))
 578                         IWL_ERR(mvm, "Couldn't send BT_CONFIG cmd\n");
 579                 data->reduced_tx_power = false;
 580
 581                 /* ... and there is no need to get reports on RSSI any more. */
 582                 mvmvif->bf_data.last_bt_coex_event = 0;
 583                 mvmvif->bf_data.bt_coex_max_thold = 0;
 584                 mvmvif->bf_data.bt_coex_min_thold = 0;
 585                 return;
 586         }
 587
 588         /* try to get the avg rssi from fw */
 589         ave_rssi = mvmvif->bf_data.ave_beacon_signal;
 590
 591         /* if the RSSI isn't valid, fake it is very low */
 592         if (!ave_rssi)
 593                 ave_rssi = -100;
 594         if (ave_rssi > BT_ENABLE_REDUCED_TXPOWER_THRESHOLD) {
 595                 if (iwl_mvm_bt_coex_reduced_txp(mvm, mvmvif->ap_sta_id, true))
 596                         IWL_ERR(mvm, "Couldn't send BT_CONFIG cmd\n");
 597
 598                 /*
 599                  * bt_kill_msk can be BT_KILL_MSK_REDUCED_TXPOW only if all the
 600                  * BSS / P2P clients have rssi above threshold.
 601                  * We set the bt_kill_msk to BT_KILL_MSK_REDUCED_TXPOW before
 602                  * the iteration, if one interface's rssi isn't good enough,
 603                  * bt_kill_msk will be set to default values.
 604                  */
 605         } else if (ave_rssi < BT_DISABLE_REDUCED_TXPOWER_THRESHOLD) {
 606                 if (iwl_mvm_bt_coex_reduced_txp(mvm, mvmvif->ap_sta_id, false))
 607                         IWL_ERR(mvm, "Couldn't send BT_CONFIG cmd\n");
 608
 609                 /*
 610                  * One interface hasn't rssi above threshold, bt_kill_msk must
 611                  * be set to default values.
 612                  */
 613                 data->reduced_tx_power = false;
 614         }
 615
 616         /* Begin to monitor the RSSI: it may influence the reduced Tx power */
 617
 618         /* reset previous bt coex event tracking */
 619         mvmvif->bf_data.last_bt_coex_event = 0;
 620         mvmvif->bf_data.bt_coex_max_thold =
 621                 BT_ENABLE_REDUCED_TXPOWER_THRESHOLD;
 622         mvmvif->bf_data.bt_coex_min_thold =
 623                 BT_DISABLE_REDUCED_TXPOWER_THRESHOLD;
 624 }
 625
 626 static void iwl_mvm_bt_coex_notif_handle(struct iwl_mvm *mvm)
 627 {
 628         struct iwl_bt_iterator_data data = {
 629                 .mvm = mvm,
 630                 .notif = &mvm->last_bt_notif,
 631                 .reduced_tx_power = true,
 632         };
 633         struct iwl_bt_coex_ci_cmd cmd = {};
 634         u8 ci_bw_idx;
 635
 636         rcu_read_lock();
 637         ieee80211_iterate_active_interfaces_atomic(
 638                                         mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
 639                                         iwl_mvm_bt_notif_iterator, &data);
 640
 641         if (data.primary) {
 642                 struct ieee80211_chanctx_conf *chan = data.primary;
 643                 if (WARN_ON(!chan->def.chan)) {
 644                         rcu_read_unlock();
 645                         return;
 646                 }
 647
 648                 if (chan->def.width < NL80211_CHAN_WIDTH_40) {
 649                         ci_bw_idx = 0;
 650                         cmd.co_run_bw_primary = 0;
 651                 } else {
 652                         cmd.co_run_bw_primary = 1;
 653                         if (chan->def.center_freq1 >
 654                             chan->def.chan->center_freq)
 655                                 ci_bw_idx = 2;
 656                         else
 657                                 ci_bw_idx = 1;
 658                 }
 659
 660                 cmd.bt_primary_ci =
 661                         iwl_ci_mask[chan->def.chan->hw_value][ci_bw_idx];
 662                 cmd.primary_ch_phy_id = *((u16 *)data.primary->drv_priv);
 663         }
 664
 665         if (data.secondary) {
 666                 struct ieee80211_chanctx_conf *chan = data.secondary;
 667                 if (WARN_ON(!data.secondary->def.chan)) {
 668                         rcu_read_unlock();
 669                         return;
 670                 }
 671
 672                 if (chan->def.width < NL80211_CHAN_WIDTH_40) {
 673                         ci_bw_idx = 0;
 674                         cmd.co_run_bw_secondary = 0;
 675                 } else {
 676                         cmd.co_run_bw_secondary = 1;
 677                         if (chan->def.center_freq1 >
 678                             chan->def.chan->center_freq)
 679                                 ci_bw_idx = 2;
 680                         else
 681                                 ci_bw_idx = 1;
 682                 }
 683
 684                 cmd.bt_secondary_ci =
 685                         iwl_ci_mask[chan->def.chan->hw_value][ci_bw_idx];
 686                 cmd.secondary_ch_phy_id = *((u16 *)data.primary->drv_priv);
 687         }
 688
 689         rcu_read_unlock();
 690
 691         /* Don't spam the fw with the same command over and over */
 692         if (memcmp(&cmd, &mvm->last_bt_ci_cmd, sizeof(cmd))) {
 693                 if (iwl_mvm_send_cmd_pdu(mvm, BT_COEX_CI, CMD_SYNC,
 694                                          sizeof(cmd), &cmd))
 695                         IWL_ERR(mvm, "Failed to send BT_CI cmd");
 696                 memcpy(&mvm->last_bt_ci_cmd, &cmd, sizeof(cmd));
 697         }
 698
 699         /*
 700          * If there are no BSS / P2P client interfaces, reduced Tx Power is
 701          * irrelevant since it is based on the RSSI coming from the beacon.
 702          * Use BT_KILL_MSK_DEFAULT in that case.
 703          */
 704         data.reduced_tx_power = data.reduced_tx_power && data.num_bss_ifaces;
 705
 706         if (iwl_mvm_bt_udpate_ctrl_kill_msk(mvm, data.reduced_tx_power))
 707                 IWL_ERR(mvm, "Failed to update the ctrl_kill_msk\n");
 708 }
 709
 710 /* upon association, the fw will send in BT Coex notification */
 711 int iwl_mvm_rx_bt_coex_notif(struct iwl_mvm *mvm,
 712                              struct iwl_rx_cmd_buffer *rxb,
 713                              struct iwl_device_cmd *dev_cmd)
 714 {
 715         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 716         struct iwl_bt_coex_profile_notif *notif = (void *)pkt->data;
 717
 718
 719         IWL_DEBUG_COEX(mvm, "BT Coex Notification received\n");
 720         IWL_DEBUG_COEX(mvm, "\tBT status: %s\n",
 721                        notif->bt_status ? "ON" : "OFF");
 722         IWL_DEBUG_COEX(mvm, "\tBT open conn %d\n", notif->bt_open_conn);
 723         IWL_DEBUG_COEX(mvm, "\tBT ci compliance %d\n", notif->bt_ci_compliance);
 724         IWL_DEBUG_COEX(mvm, "\tBT primary_ch_lut %d\n",
 725                        le32_to_cpu(notif->primary_ch_lut));
 726         IWL_DEBUG_COEX(mvm, "\tBT secondary_ch_lut %d\n",
 727                        le32_to_cpu(notif->secondary_ch_lut));
 728         IWL_DEBUG_COEX(mvm, "\tBT activity grading %d\n",
 729                        le32_to_cpu(notif->bt_activity_grading));
 730         IWL_DEBUG_COEX(mvm, "\tBT agg traffic load %d\n",
 731                        notif->bt_agg_traffic_load);
 732
 733         /* remember this notification for future use: rssi fluctuations */
 734         memcpy(&mvm->last_bt_notif, notif, sizeof(mvm->last_bt_notif));
 735
 736         iwl_mvm_bt_coex_notif_handle(mvm);
 737
 738         /*
 739          * This is an async handler for a notification, returning anything other
 740          * than 0 doesn't make sense even if HCMD failed.
 741          */
 742         return 0;
 743 }
 744
 745 static void iwl_mvm_bt_rssi_iterator(void *_data, u8 *mac,
 746                                    struct ieee80211_vif *vif)
 747 {
 748         struct iwl_mvm_vif *mvmvif = (void *)vif->drv_priv;
 749         struct iwl_bt_iterator_data *data = _data;
 750         struct iwl_mvm *mvm = data->mvm;
 751
 752         struct ieee80211_sta *sta;
 753         struct iwl_mvm_sta *mvmsta;
 754
 755         if (vif->type != NL80211_IFTYPE_STATION ||
 756             mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT)
 757                 return;
 758
 759         sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id],
 760                                         lockdep_is_held(&mvm->mutex));
 761         mvmsta = (void *)sta->drv_priv;
 762
 763         data->num_bss_ifaces++;
 764
 765         /*
 766          * This interface doesn't support reduced Tx power (because of low
 767          * RSSI probably), then set bt_kill_msk to default values.
 768          */
 769         if (!mvmsta->bt_reduced_txpower)
 770                 data->reduced_tx_power = false;
 771         /* else - possibly leave it to BT_KILL_MSK_REDUCED_TXPOW */
 772 }
 773
 774 void iwl_mvm_bt_rssi_event(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 775                            enum ieee80211_rssi_event rssi_event)
 776 {
 777         struct iwl_mvm_vif *mvmvif = (void *)vif->drv_priv;
 778         struct iwl_bt_iterator_data data = {
 779                 .mvm = mvm,
 780                 .reduced_tx_power = true,
 781         };
 782         int ret;
 783
 784         lockdep_assert_held(&mvm->mutex);
 785
 786         /* Rssi update while not associated ?! */
 787         if (WARN_ON_ONCE(mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT))
 788                 return;
 789
 790         /* No BT - reports should be disabled */
 791         if (le32_to_cpu(mvm->last_bt_notif.bt_activity_grading) == BT_OFF)
 792                 return;
 793
 794         IWL_DEBUG_COEX(mvm, "RSSI for %pM is now %s\n", vif->bss_conf.bssid,
 795                        rssi_event == RSSI_EVENT_HIGH ? "HIGH" : "LOW");
 796
 797         /*
 798          * Check if rssi is good enough for reduced Tx power, but not in loose
 799          * scheme.
 800          */
 801         if (rssi_event == RSSI_EVENT_LOW || mvm->cfg->bt_shared_single_ant ||
 802             iwl_get_coex_type(mvm, vif) == BT_COEX_LOOSE_LUT)
 803                 ret = iwl_mvm_bt_coex_reduced_txp(mvm, mvmvif->ap_sta_id,
 804                                                   false);
 805         else
 806                 ret = iwl_mvm_bt_coex_reduced_txp(mvm, mvmvif->ap_sta_id, true);
 807
 808         if (ret)
 809                 IWL_ERR(mvm, "couldn't send BT_CONFIG HCMD upon RSSI event\n");
 810
 811         ieee80211_iterate_active_interfaces_atomic(
 812                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
 813                 iwl_mvm_bt_rssi_iterator, &data);
 814
 815         /*
 816          * If there are no BSS / P2P client interfaces, reduced Tx Power is
 817          * irrelevant since it is based on the RSSI coming from the beacon.
 818          * Use BT_KILL_MSK_DEFAULT in that case.
 819          */
 820         data.reduced_tx_power = data.reduced_tx_power && data.num_bss_ifaces;
 821
 822         if (iwl_mvm_bt_udpate_ctrl_kill_msk(mvm, data.reduced_tx_power))
 823                 IWL_ERR(mvm, "Failed to update the ctrl_kill_msk\n");
 824 }
 825
 826 void iwl_mvm_bt_coex_vif_change(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 827 {
 828         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_NEWBT_COEX))
 829                 return;
 830
 831         iwl_mvm_bt_coex_notif_handle(mvm);
 832 }