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
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  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  22  * USA
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  28  *  Intel Linux Wireless <ilw@linux.intel.com>
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  32  *
  33  * Copyright(c) 2013 Intel Corporation. All rights reserved.
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  41  *    notice, this list of conditions and the following disclaimer.
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  44  *    the documentation and/or other materials provided with the
  45  *    distribution.
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  47  *    contributors may be used to endorse or promote products derived
  48  *    from this software without specific prior written permission.
  49  *
  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_single_shared_ant[BT_COEX_MAX_LUT][BT_COEX_LUT_SIZE] = {
 135         {
 136                 cpu_to_le32(0x40000000),
 137                 cpu_to_le32(0x00000000),
 138                 cpu_to_le32(0x44000000),
 139                 cpu_to_le32(0x00000000),
 140                 cpu_to_le32(0x40000000),
 141                 cpu_to_le32(0x00000000),
 142                 cpu_to_le32(0x44000000),
 143                 cpu_to_le32(0x00000000),
 144                 cpu_to_le32(0xc0004000),
 145                 cpu_to_le32(0xf0005000),
 146                 cpu_to_le32(0xc0004000),
 147                 cpu_to_le32(0xf0005000),
 148         },
 149         {
 150                 cpu_to_le32(0x40000000),
 151                 cpu_to_le32(0x00000000),
 152                 cpu_to_le32(0x44000000),
 153                 cpu_to_le32(0x00000000),
 154                 cpu_to_le32(0x40000000),
 155                 cpu_to_le32(0x00000000),
 156                 cpu_to_le32(0x44000000),
 157                 cpu_to_le32(0x00000000),
 158                 cpu_to_le32(0xc0004000),
 159                 cpu_to_le32(0xf0005000),
 160                 cpu_to_le32(0xc0004000),
 161                 cpu_to_le32(0xf0005000),
 162         },
 163         {
 164                 cpu_to_le32(0x40000000),
 165                 cpu_to_le32(0x00000000),
 166                 cpu_to_le32(0x44000000),
 167                 cpu_to_le32(0x00000000),
 168                 cpu_to_le32(0x40000000),
 169                 cpu_to_le32(0x00000000),
 170                 cpu_to_le32(0x44000000),
 171                 cpu_to_le32(0x00000000),
 172                 cpu_to_le32(0xc0004000),
 173                 cpu_to_le32(0xf0005000),
 174                 cpu_to_le32(0xc0004000),
 175                 cpu_to_le32(0xf0005000),
 176         },
 177 };
 178
 179 static const __le32 iwl_combined_lookup[BT_COEX_MAX_LUT][BT_COEX_LUT_SIZE] = {
 180         {
 181                 /* Tight */
 182                 cpu_to_le32(0xaaaaaaaa),
 183                 cpu_to_le32(0xaaaaaaaa),
 184                 cpu_to_le32(0xaeaaaaaa),
 185                 cpu_to_le32(0xaaaaaaaa),
 186                 cpu_to_le32(0xcc00ff28),
 187                 cpu_to_le32(0x0000aaaa),
 188                 cpu_to_le32(0xcc00aaaa),
 189                 cpu_to_le32(0x0000aaaa),
 190                 cpu_to_le32(0xc0004000),
 191                 cpu_to_le32(0x00000000),
 192                 cpu_to_le32(0xf0005000),
 193                 cpu_to_le32(0xf0005000),
 194         },
 195         {
 196                 /* Loose */
 197                 cpu_to_le32(0xaaaaaaaa),
 198                 cpu_to_le32(0xaaaaaaaa),
 199                 cpu_to_le32(0xaaaaaaaa),
 200                 cpu_to_le32(0xaaaaaaaa),
 201                 cpu_to_le32(0xcc00ff28),
 202                 cpu_to_le32(0x0000aaaa),
 203                 cpu_to_le32(0xcc00aaaa),
 204                 cpu_to_le32(0x0000aaaa),
 205                 cpu_to_le32(0x00000000),
 206                 cpu_to_le32(0x00000000),
 207                 cpu_to_le32(0xf0005000),
 208                 cpu_to_le32(0xf0005000),
 209         },
 210         {
 211                 /* Tx Tx disabled */
 212                 cpu_to_le32(0xaaaaaaaa),
 213                 cpu_to_le32(0xaaaaaaaa),
 214                 cpu_to_le32(0xaaaaaaaa),
 215                 cpu_to_le32(0xaaaaaaaa),
 216                 cpu_to_le32(0xcc00ff28),
 217                 cpu_to_le32(0x0000aaaa),
 218                 cpu_to_le32(0xcc00aaaa),
 219                 cpu_to_le32(0x0000aaaa),
 220                 cpu_to_le32(0xC0004000),
 221                 cpu_to_le32(0xC0004000),
 222                 cpu_to_le32(0xF0005000),
 223                 cpu_to_le32(0xF0005000),
 224         },
 225 };
 226
 227 /* 20MHz / 40MHz below / 40Mhz above*/
 228 static const __le64 iwl_ci_mask[][3] = {
 229         /* dummy entry for channel 0 */
 230         {cpu_to_le64(0), cpu_to_le64(0), cpu_to_le64(0)},
 231         {
 232                 cpu_to_le64(0x0000001FFFULL),
 233                 cpu_to_le64(0x0ULL),
 234                 cpu_to_le64(0x00007FFFFFULL),
 235         },
 236         {
 237                 cpu_to_le64(0x000000FFFFULL),
 238                 cpu_to_le64(0x0ULL),
 239                 cpu_to_le64(0x0003FFFFFFULL),
 240         },
 241         {
 242                 cpu_to_le64(0x000003FFFCULL),
 243                 cpu_to_le64(0x0ULL),
 244                 cpu_to_le64(0x000FFFFFFCULL),
 245         },
 246         {
 247                 cpu_to_le64(0x00001FFFE0ULL),
 248                 cpu_to_le64(0x0ULL),
 249                 cpu_to_le64(0x007FFFFFE0ULL),
 250         },
 251         {
 252                 cpu_to_le64(0x00007FFF80ULL),
 253                 cpu_to_le64(0x00007FFFFFULL),
 254                 cpu_to_le64(0x01FFFFFF80ULL),
 255         },
 256         {
 257                 cpu_to_le64(0x0003FFFC00ULL),
 258                 cpu_to_le64(0x0003FFFFFFULL),
 259                 cpu_to_le64(0x0FFFFFFC00ULL),
 260         },
 261         {
 262                 cpu_to_le64(0x000FFFF000ULL),
 263                 cpu_to_le64(0x000FFFFFFCULL),
 264                 cpu_to_le64(0x3FFFFFF000ULL),
 265         },
 266         {
 267                 cpu_to_le64(0x007FFF8000ULL),
 268                 cpu_to_le64(0x007FFFFFE0ULL),
 269                 cpu_to_le64(0xFFFFFF8000ULL),
 270         },
 271         {
 272                 cpu_to_le64(0x01FFFE0000ULL),
 273                 cpu_to_le64(0x01FFFFFF80ULL),
 274                 cpu_to_le64(0xFFFFFE0000ULL),
 275         },
 276         {
 277                 cpu_to_le64(0x0FFFF00000ULL),
 278                 cpu_to_le64(0x0FFFFFFC00ULL),
 279                 cpu_to_le64(0x0ULL),
 280         },
 281         {
 282                 cpu_to_le64(0x3FFFC00000ULL),
 283                 cpu_to_le64(0x3FFFFFF000ULL),
 284                 cpu_to_le64(0x0)
 285         },
 286         {
 287                 cpu_to_le64(0xFFFE000000ULL),
 288                 cpu_to_le64(0xFFFFFF8000ULL),
 289                 cpu_to_le64(0x0)
 290         },
 291         {
 292                 cpu_to_le64(0xFFF8000000ULL),
 293                 cpu_to_le64(0xFFFFFE0000ULL),
 294                 cpu_to_le64(0x0)
 295         },
 296         {
 297                 cpu_to_le64(0xFE00000000ULL),
 298                 cpu_to_le64(0x0ULL),
 299                 cpu_to_le64(0x0)
 300         },
 301 };
 302
 303 static const __le32 iwl_bt_mprio_lut[BT_COEX_MULTI_PRIO_LUT_SIZE] = {
 304         cpu_to_le32(0x22002200),
 305         cpu_to_le32(0x33113311),
 306 };
 307
 308 static enum iwl_bt_coex_lut_type
 309 iwl_get_coex_type(struct iwl_mvm *mvm, const struct ieee80211_vif *vif)
 310 {
 311         struct ieee80211_chanctx_conf *chanctx_conf;
 312         enum iwl_bt_coex_lut_type ret;
 313         u16 phy_ctx_id;
 314
 315         /*
 316          * Checking that we hold mvm->mutex is a good idea, but the rate
 317          * control can't acquire the mutex since it runs in Tx path.
 318          * So this is racy in that case, but in the worst case, the AMPDU
 319          * size limit will be wrong for a short time which is not a big
 320          * issue.
 321          */
 322
 323         rcu_read_lock();
 324
 325         chanctx_conf = rcu_dereference(vif->chanctx_conf);
 326
 327         if (!chanctx_conf ||
 328              chanctx_conf->def.chan->band != IEEE80211_BAND_2GHZ) {
 329                 rcu_read_unlock();
 330                 return BT_COEX_LOOSE_LUT;
 331         }
 332
 333         ret = BT_COEX_TX_DIS_LUT;
 334
 335         if (mvm->cfg->bt_shared_single_ant) {
 336                 rcu_read_unlock();
 337                 return ret;
 338         }
 339
 340         phy_ctx_id = *((u16 *)chanctx_conf->drv_priv);
 341
 342         if (mvm->last_bt_ci_cmd.primary_ch_phy_id == phy_ctx_id)
 343                 ret = le32_to_cpu(mvm->last_bt_notif.primary_ch_lut);
 344         else if (mvm->last_bt_ci_cmd.secondary_ch_phy_id == phy_ctx_id)
 345                 ret = le32_to_cpu(mvm->last_bt_notif.secondary_ch_lut);
 346         /* else - default = TX TX disallowed */
 347
 348         rcu_read_unlock();
 349
 350         return ret;
 351 }
 352
 353 int iwl_send_bt_init_conf(struct iwl_mvm *mvm)
 354 {
 355         struct iwl_bt_coex_cmd *bt_cmd;
 356         struct iwl_host_cmd cmd = {
 357                 .id = BT_CONFIG,
 358                 .len = { sizeof(*bt_cmd), },
 359                 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
 360                 .flags = CMD_SYNC,
 361         };
 362         int ret;
 363         u32 flags;
 364
 365         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_NEWBT_COEX))
 366                 return 0;
 367
 368         bt_cmd = kzalloc(sizeof(*bt_cmd), GFP_KERNEL);
 369         if (!bt_cmd)
 370                 return -ENOMEM;
 371         cmd.data[0] = bt_cmd;
 372
 373         bt_cmd->max_kill = 5;
 374         bt_cmd->bt4_antenna_isolation_thr = BT_ANTENNA_COUPLING_THRESHOLD,
 375         bt_cmd->bt4_antenna_isolation = iwlwifi_mod_params.ant_coupling,
 376         bt_cmd->bt4_tx_tx_delta_freq_thr = 15,
 377         bt_cmd->bt4_tx_rx_max_freq0 = 15,
 378
 379         flags = iwlwifi_mod_params.bt_coex_active ?
 380                         BT_COEX_NW : BT_COEX_DISABLE;
 381         flags |= BT_CH_PRIMARY_EN | BT_CH_SECONDARY_EN | BT_SYNC_2_BT_DISABLE;
 382         bt_cmd->flags = cpu_to_le32(flags);
 383
 384         bt_cmd->valid_bit_msk = cpu_to_le32(BT_VALID_ENABLE |
 385                                             BT_VALID_BT_PRIO_BOOST |
 386                                             BT_VALID_MAX_KILL |
 387                                             BT_VALID_3W_TMRS |
 388                                             BT_VALID_KILL_ACK |
 389                                             BT_VALID_KILL_CTS |
 390                                             BT_VALID_REDUCED_TX_POWER |
 391                                             BT_VALID_LUT |
 392                                             BT_VALID_WIFI_RX_SW_PRIO_BOOST |
 393                                             BT_VALID_WIFI_TX_SW_PRIO_BOOST |
 394                                             BT_VALID_MULTI_PRIO_LUT |
 395                                             BT_VALID_CORUN_LUT_20 |
 396                                             BT_VALID_CORUN_LUT_40 |
 397                                             BT_VALID_ANT_ISOLATION |
 398                                             BT_VALID_ANT_ISOLATION_THRS |
 399                                             BT_VALID_TXTX_DELTA_FREQ_THRS |
 400                                             BT_VALID_TXRX_MAX_FREQ_0);
 401
 402         if (mvm->cfg->bt_shared_single_ant)
 403                 memcpy(&bt_cmd->decision_lut, iwl_single_shared_ant,
 404                        sizeof(iwl_single_shared_ant));
 405         else
 406                 memcpy(&bt_cmd->decision_lut, iwl_combined_lookup,
 407                        sizeof(iwl_combined_lookup));
 408
 409         memcpy(&bt_cmd->bt_prio_boost, iwl_bt_prio_boost,
 410                sizeof(iwl_bt_prio_boost));
 411         memcpy(&bt_cmd->bt4_multiprio_lut, iwl_bt_mprio_lut,
 412                sizeof(iwl_bt_mprio_lut));
 413         bt_cmd->kill_ack_msk =
 414                 cpu_to_le32(iwl_bt_ack_kill_msk[BT_KILL_MSK_DEFAULT]);
 415         bt_cmd->kill_cts_msk =
 416                 cpu_to_le32(iwl_bt_cts_kill_msk[BT_KILL_MSK_DEFAULT]);
 417
 418         memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif));
 419         memset(&mvm->last_bt_ci_cmd, 0, sizeof(mvm->last_bt_ci_cmd));
 420
 421         ret = iwl_mvm_send_cmd(mvm, &cmd);
 422
 423         kfree(bt_cmd);
 424         return ret;
 425 }
 426
 427 static int iwl_mvm_bt_udpate_ctrl_kill_msk(struct iwl_mvm *mvm,
 428                                            bool reduced_tx_power)
 429 {
 430         enum iwl_bt_kill_msk bt_kill_msk;
 431         struct iwl_bt_coex_cmd *bt_cmd;
 432         struct iwl_bt_coex_profile_notif *notif = &mvm->last_bt_notif;
 433         struct iwl_host_cmd cmd = {
 434                 .id = BT_CONFIG,
 435                 .data[0] = &bt_cmd,
 436                 .len = { sizeof(*bt_cmd), },
 437                 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
 438                 .flags = CMD_SYNC,
 439         };
 440         int ret = 0;
 441
 442         lockdep_assert_held(&mvm->mutex);
 443
 444         if (reduced_tx_power) {
 445                 /* Reduced Tx power has precedence on the type of the profile */
 446                 bt_kill_msk = BT_KILL_MSK_REDUCED_TXPOW;
 447         } else {
 448                 /* Low latency BT profile is active: give higher prio to BT */
 449                 if (BT_MBOX_MSG(notif, 3, SCO_STATE)  ||
 450                     BT_MBOX_MSG(notif, 3, A2DP_STATE) ||
 451                     BT_MBOX_MSG(notif, 3, SNIFF_STATE))
 452                         bt_kill_msk = BT_KILL_MSK_SCO_HID_A2DP;
 453                 else
 454                         bt_kill_msk = BT_KILL_MSK_DEFAULT;
 455         }
 456
 457         IWL_DEBUG_COEX(mvm,
 458                        "Update kill_msk: %d - SCO %sactive A2DP %sactive SNIFF %sactive\n",
 459                        bt_kill_msk,
 460                        BT_MBOX_MSG(notif, 3, SCO_STATE) ? "" : "in",
 461                        BT_MBOX_MSG(notif, 3, A2DP_STATE) ? "" : "in",
 462                        BT_MBOX_MSG(notif, 3, SNIFF_STATE) ? "" : "in");
 463
 464         /* Don't send HCMD if there is no update */
 465         if (bt_kill_msk == mvm->bt_kill_msk)
 466                 return 0;
 467
 468         mvm->bt_kill_msk = bt_kill_msk;
 469
 470         bt_cmd = kzalloc(sizeof(*bt_cmd), GFP_KERNEL);
 471         if (!bt_cmd)
 472                 return -ENOMEM;
 473         cmd.data[0] = bt_cmd;
 474
 475         bt_cmd->kill_ack_msk = cpu_to_le32(iwl_bt_ack_kill_msk[bt_kill_msk]);
 476         bt_cmd->kill_cts_msk = cpu_to_le32(iwl_bt_cts_kill_msk[bt_kill_msk]);
 477         bt_cmd->valid_bit_msk =
 478                 cpu_to_le32(BT_VALID_KILL_ACK | BT_VALID_KILL_CTS);
 479
 480         IWL_DEBUG_COEX(mvm, "ACK Kill msk = 0x%08x, CTS Kill msk = 0x%08x\n",
 481                        iwl_bt_ack_kill_msk[bt_kill_msk],
 482                        iwl_bt_cts_kill_msk[bt_kill_msk]);
 483
 484         ret = iwl_mvm_send_cmd(mvm, &cmd);
 485
 486         kfree(bt_cmd);
 487         return ret;
 488 }
 489
 490 static int iwl_mvm_bt_coex_reduced_txp(struct iwl_mvm *mvm, u8 sta_id,
 491                                        bool enable)
 492 {
 493         struct iwl_bt_coex_cmd *bt_cmd;
 494         /* Send ASYNC since this can be sent from an atomic context */
 495         struct iwl_host_cmd cmd = {
 496                 .id = BT_CONFIG,
 497                 .len = { sizeof(*bt_cmd), },
 498                 .dataflags = { IWL_HCMD_DFL_DUP, },
 499                 .flags = CMD_ASYNC,
 500         };
 501
 502         struct ieee80211_sta *sta;
 503         struct iwl_mvm_sta *mvmsta;
 504         int ret;
 505
 506         /* This can happen if the station has been removed right now */
 507         if (sta_id == IWL_MVM_STATION_COUNT)
 508                 return 0;
 509
 510         sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
 511                                         lockdep_is_held(&mvm->mutex));
 512         mvmsta = (void *)sta->drv_priv;
 513
 514         /* nothing to do */
 515         if (mvmsta->bt_reduced_txpower == enable)
 516                 return 0;
 517
 518         bt_cmd = kzalloc(sizeof(*bt_cmd), GFP_ATOMIC);
 519         if (!bt_cmd)
 520                 return -ENOMEM;
 521         cmd.data[0] = bt_cmd;
 522
 523         bt_cmd->valid_bit_msk = cpu_to_le32(BT_VALID_REDUCED_TX_POWER),
 524         bt_cmd->bt_reduced_tx_power = sta_id;
 525
 526         if (enable)
 527                 bt_cmd->bt_reduced_tx_power |= BT_REDUCED_TX_POWER_BIT;
 528
 529         IWL_DEBUG_COEX(mvm, "%sable reduced Tx Power for sta %d\n",
 530                        enable ? "en" : "dis", sta_id);
 531
 532         mvmsta->bt_reduced_txpower = enable;
 533
 534         ret = iwl_mvm_send_cmd(mvm, &cmd);
 535
 536         kfree(bt_cmd);
 537         return ret;
 538 }
 539
 540 struct iwl_bt_iterator_data {
 541         struct iwl_bt_coex_profile_notif *notif;
 542         struct iwl_mvm *mvm;
 543         u32 num_bss_ifaces;
 544         bool reduced_tx_power;
 545         struct ieee80211_chanctx_conf *primary;
 546         struct ieee80211_chanctx_conf *secondary;
 547 };
 548
 549 static inline
 550 void iwl_mvm_bt_coex_enable_rssi_event(struct iwl_mvm *mvm,
 551                                        struct ieee80211_vif *vif,
 552                                        bool enable, int rssi)
 553 {
 554         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 555
 556         mvmvif->bf_data.last_bt_coex_event = rssi;
 557         mvmvif->bf_data.bt_coex_max_thold =
 558                 enable ? BT_ENABLE_REDUCED_TXPOWER_THRESHOLD : 0;
 559         mvmvif->bf_data.bt_coex_min_thold =
 560                 enable ? BT_DISABLE_REDUCED_TXPOWER_THRESHOLD : 0;
 561 }
 562
 563 /* must be called under rcu_read_lock */
 564 static void iwl_mvm_bt_notif_iterator(void *_data, u8 *mac,
 565                                       struct ieee80211_vif *vif)
 566 {
 567         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 568         struct iwl_bt_iterator_data *data = _data;
 569         struct iwl_mvm *mvm = data->mvm;
 570         struct ieee80211_chanctx_conf *chanctx_conf;
 571         enum ieee80211_smps_mode smps_mode;
 572         int ave_rssi;
 573
 574         lockdep_assert_held(&mvm->mutex);
 575
 576         if (vif->type != NL80211_IFTYPE_STATION &&
 577             vif->type != NL80211_IFTYPE_AP)
 578                 return;
 579
 580         smps_mode = IEEE80211_SMPS_AUTOMATIC;
 581
 582         chanctx_conf = rcu_dereference(vif->chanctx_conf);
 583
 584         /* If channel context is invalid or not on 2.4GHz .. */
 585         if ((!chanctx_conf ||
 586              chanctx_conf->def.chan->band != IEEE80211_BAND_2GHZ)) {
 587                 /* ... and it is an associated STATION, relax constraints */
 588                 if (vif->type == NL80211_IFTYPE_STATION && vif->bss_conf.assoc)
 589                         iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_BT_COEX,
 590                                             smps_mode);
 591                 iwl_mvm_bt_coex_enable_rssi_event(mvm, vif, false, 0);
 592                 return;
 593         }
 594
 595         /* SoftAP / GO will always be primary */
 596         if (vif->type == NL80211_IFTYPE_AP) {
 597                 if (!mvmvif->ap_active)
 598                         return;
 599
 600                 /* the Ack / Cts kill mask must be default if AP / GO */
 601                 data->reduced_tx_power = false;
 602
 603                 if (chanctx_conf == data->primary)
 604                         return;
 605
 606                 /* downgrade the current primary no matter what its type is */
 607                 data->secondary = data->primary;
 608                 data->primary = chanctx_conf;
 609                 return;
 610         }
 611
 612         data->num_bss_ifaces++;
 613
 614         /* we are now a STA / P2P Client, and take associated ones only */
 615         if (!vif->bss_conf.assoc)
 616                 return;
 617
 618         /* STA / P2P Client, try to be primary if first vif */
 619         if (!data->primary || data->primary == chanctx_conf)
 620                 data->primary = chanctx_conf;
 621         else if (!data->secondary)
 622                 /* if secondary is not NULL, it might be a GO */
 623                 data->secondary = chanctx_conf;
 624
 625         if (le32_to_cpu(data->notif->bt_activity_grading) >= BT_HIGH_TRAFFIC)
 626                 smps_mode = IEEE80211_SMPS_STATIC;
 627         else if (le32_to_cpu(data->notif->bt_activity_grading) >=
 628                  BT_LOW_TRAFFIC)
 629                 smps_mode = IEEE80211_SMPS_DYNAMIC;
 630
 631         IWL_DEBUG_COEX(data->mvm,
 632                        "mac %d: bt_status %d bt_activity_grading %d smps_req %d\n",
 633                        mvmvif->id,  data->notif->bt_status,
 634                        data->notif->bt_activity_grading, smps_mode);
 635
 636         iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_BT_COEX, smps_mode);
 637
 638         /* don't reduce the Tx power if in loose scheme */
 639         if (iwl_get_coex_type(mvm, vif) == BT_COEX_LOOSE_LUT ||
 640             mvm->cfg->bt_shared_single_ant) {
 641                 data->reduced_tx_power = false;
 642                 iwl_mvm_bt_coex_enable_rssi_event(mvm, vif, false, 0);
 643                 return;
 644         }
 645
 646         /* reduced Txpower only if BT is on, so ...*/
 647         if (le32_to_cpu(data->notif->bt_activity_grading) == BT_OFF) {
 648                 /* ... cancel reduced Tx power ... */
 649                 if (iwl_mvm_bt_coex_reduced_txp(mvm, mvmvif->ap_sta_id, false))
 650                         IWL_ERR(mvm, "Couldn't send BT_CONFIG cmd\n");
 651                 data->reduced_tx_power = false;
 652
 653                 /* ... and there is no need to get reports on RSSI any more. */
 654                 iwl_mvm_bt_coex_enable_rssi_event(mvm, vif, false, 0);
 655                 return;
 656         }
 657
 658         /* try to get the avg rssi from fw */
 659         ave_rssi = mvmvif->bf_data.ave_beacon_signal;
 660
 661         /* if the RSSI isn't valid, fake it is very low */
 662         if (!ave_rssi)
 663                 ave_rssi = -100;
 664         if (ave_rssi > BT_ENABLE_REDUCED_TXPOWER_THRESHOLD) {
 665                 if (iwl_mvm_bt_coex_reduced_txp(mvm, mvmvif->ap_sta_id, true))
 666                         IWL_ERR(mvm, "Couldn't send BT_CONFIG cmd\n");
 667
 668                 /*
 669                  * bt_kill_msk can be BT_KILL_MSK_REDUCED_TXPOW only if all the
 670                  * BSS / P2P clients have rssi above threshold.
 671                  * We set the bt_kill_msk to BT_KILL_MSK_REDUCED_TXPOW before
 672                  * the iteration, if one interface's rssi isn't good enough,
 673                  * bt_kill_msk will be set to default values.
 674                  */
 675         } else if (ave_rssi < BT_DISABLE_REDUCED_TXPOWER_THRESHOLD) {
 676                 if (iwl_mvm_bt_coex_reduced_txp(mvm, mvmvif->ap_sta_id, false))
 677                         IWL_ERR(mvm, "Couldn't send BT_CONFIG cmd\n");
 678
 679                 /*
 680                  * One interface hasn't rssi above threshold, bt_kill_msk must
 681                  * be set to default values.
 682                  */
 683                 data->reduced_tx_power = false;
 684         }
 685
 686         /* Begin to monitor the RSSI: it may influence the reduced Tx power */
 687         iwl_mvm_bt_coex_enable_rssi_event(mvm, vif, true, ave_rssi);
 688 }
 689
 690 static void iwl_mvm_bt_coex_notif_handle(struct iwl_mvm *mvm)
 691 {
 692         struct iwl_bt_iterator_data data = {
 693                 .mvm = mvm,
 694                 .notif = &mvm->last_bt_notif,
 695                 .reduced_tx_power = true,
 696         };
 697         struct iwl_bt_coex_ci_cmd cmd = {};
 698         u8 ci_bw_idx;
 699
 700         rcu_read_lock();
 701         ieee80211_iterate_active_interfaces_atomic(
 702                                         mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
 703                                         iwl_mvm_bt_notif_iterator, &data);
 704
 705         if (data.primary) {
 706                 struct ieee80211_chanctx_conf *chan = data.primary;
 707                 if (WARN_ON(!chan->def.chan)) {
 708                         rcu_read_unlock();
 709                         return;
 710                 }
 711
 712                 if (chan->def.width < NL80211_CHAN_WIDTH_40) {
 713                         ci_bw_idx = 0;
 714                         cmd.co_run_bw_primary = 0;
 715                 } else {
 716                         cmd.co_run_bw_primary = 1;
 717                         if (chan->def.center_freq1 >
 718                             chan->def.chan->center_freq)
 719                                 ci_bw_idx = 2;
 720                         else
 721                                 ci_bw_idx = 1;
 722                 }
 723
 724                 cmd.bt_primary_ci =
 725                         iwl_ci_mask[chan->def.chan->hw_value][ci_bw_idx];
 726                 cmd.primary_ch_phy_id = *((u16 *)data.primary->drv_priv);
 727         }
 728
 729         if (data.secondary) {
 730                 struct ieee80211_chanctx_conf *chan = data.secondary;
 731                 if (WARN_ON(!data.secondary->def.chan)) {
 732                         rcu_read_unlock();
 733                         return;
 734                 }
 735
 736                 if (chan->def.width < NL80211_CHAN_WIDTH_40) {
 737                         ci_bw_idx = 0;
 738                         cmd.co_run_bw_secondary = 0;
 739                 } else {
 740                         cmd.co_run_bw_secondary = 1;
 741                         if (chan->def.center_freq1 >
 742                             chan->def.chan->center_freq)
 743                                 ci_bw_idx = 2;
 744                         else
 745                                 ci_bw_idx = 1;
 746                 }
 747
 748                 cmd.bt_secondary_ci =
 749                         iwl_ci_mask[chan->def.chan->hw_value][ci_bw_idx];
 750                 cmd.secondary_ch_phy_id = *((u16 *)data.primary->drv_priv);
 751         }
 752
 753         rcu_read_unlock();
 754
 755         /* Don't spam the fw with the same command over and over */
 756         if (memcmp(&cmd, &mvm->last_bt_ci_cmd, sizeof(cmd))) {
 757                 if (iwl_mvm_send_cmd_pdu(mvm, BT_COEX_CI, CMD_SYNC,
 758                                          sizeof(cmd), &cmd))
 759                         IWL_ERR(mvm, "Failed to send BT_CI cmd");
 760                 memcpy(&mvm->last_bt_ci_cmd, &cmd, sizeof(cmd));
 761         }
 762
 763         /*
 764          * If there are no BSS / P2P client interfaces, reduced Tx Power is
 765          * irrelevant since it is based on the RSSI coming from the beacon.
 766          * Use BT_KILL_MSK_DEFAULT in that case.
 767          */
 768         data.reduced_tx_power = data.reduced_tx_power && data.num_bss_ifaces;
 769
 770         if (iwl_mvm_bt_udpate_ctrl_kill_msk(mvm, data.reduced_tx_power))
 771                 IWL_ERR(mvm, "Failed to update the ctrl_kill_msk\n");
 772 }
 773
 774 /* upon association, the fw will send in BT Coex notification */
 775 int iwl_mvm_rx_bt_coex_notif(struct iwl_mvm *mvm,
 776                              struct iwl_rx_cmd_buffer *rxb,
 777                              struct iwl_device_cmd *dev_cmd)
 778 {
 779         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 780         struct iwl_bt_coex_profile_notif *notif = (void *)pkt->data;
 781
 782
 783         IWL_DEBUG_COEX(mvm, "BT Coex Notification received\n");
 784         IWL_DEBUG_COEX(mvm, "\tBT status: %s\n",
 785                        notif->bt_status ? "ON" : "OFF");
 786         IWL_DEBUG_COEX(mvm, "\tBT open conn %d\n", notif->bt_open_conn);
 787         IWL_DEBUG_COEX(mvm, "\tBT ci compliance %d\n", notif->bt_ci_compliance);
 788         IWL_DEBUG_COEX(mvm, "\tBT primary_ch_lut %d\n",
 789                        le32_to_cpu(notif->primary_ch_lut));
 790         IWL_DEBUG_COEX(mvm, "\tBT secondary_ch_lut %d\n",
 791                        le32_to_cpu(notif->secondary_ch_lut));
 792         IWL_DEBUG_COEX(mvm, "\tBT activity grading %d\n",
 793                        le32_to_cpu(notif->bt_activity_grading));
 794         IWL_DEBUG_COEX(mvm, "\tBT agg traffic load %d\n",
 795                        notif->bt_agg_traffic_load);
 796
 797         /* remember this notification for future use: rssi fluctuations */
 798         memcpy(&mvm->last_bt_notif, notif, sizeof(mvm->last_bt_notif));
 799
 800         iwl_mvm_bt_coex_notif_handle(mvm);
 801
 802         /*
 803          * This is an async handler for a notification, returning anything other
 804          * than 0 doesn't make sense even if HCMD failed.
 805          */
 806         return 0;
 807 }
 808
 809 static void iwl_mvm_bt_rssi_iterator(void *_data, u8 *mac,
 810                                    struct ieee80211_vif *vif)
 811 {
 812         struct iwl_mvm_vif *mvmvif = (void *)vif->drv_priv;
 813         struct iwl_bt_iterator_data *data = _data;
 814         struct iwl_mvm *mvm = data->mvm;
 815
 816         struct ieee80211_sta *sta;
 817         struct iwl_mvm_sta *mvmsta;
 818
 819         struct ieee80211_chanctx_conf *chanctx_conf;
 820
 821         rcu_read_lock();
 822         chanctx_conf = rcu_dereference(vif->chanctx_conf);
 823         /* If channel context is invalid or not on 2.4GHz - don't count it */
 824         if (!chanctx_conf ||
 825             chanctx_conf->def.chan->band != IEEE80211_BAND_2GHZ) {
 826                 rcu_read_unlock();
 827                 return;
 828         }
 829         rcu_read_unlock();
 830
 831         if (vif->type != NL80211_IFTYPE_STATION ||
 832             mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT)
 833                 return;
 834
 835         sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id],
 836                                         lockdep_is_held(&mvm->mutex));
 837         mvmsta = (void *)sta->drv_priv;
 838
 839         data->num_bss_ifaces++;
 840
 841         /*
 842          * This interface doesn't support reduced Tx power (because of low
 843          * RSSI probably), then set bt_kill_msk to default values.
 844          */
 845         if (!mvmsta->bt_reduced_txpower)
 846                 data->reduced_tx_power = false;
 847         /* else - possibly leave it to BT_KILL_MSK_REDUCED_TXPOW */
 848 }
 849
 850 void iwl_mvm_bt_rssi_event(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 851                            enum ieee80211_rssi_event rssi_event)
 852 {
 853         struct iwl_mvm_vif *mvmvif = (void *)vif->drv_priv;
 854         struct iwl_bt_iterator_data data = {
 855                 .mvm = mvm,
 856                 .reduced_tx_power = true,
 857         };
 858         int ret;
 859
 860         lockdep_assert_held(&mvm->mutex);
 861
 862         /* Rssi update while not associated ?! */
 863         if (WARN_ON_ONCE(mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT))
 864                 return;
 865
 866         /* No BT - reports should be disabled */
 867         if (le32_to_cpu(mvm->last_bt_notif.bt_activity_grading) == BT_OFF)
 868                 return;
 869
 870         IWL_DEBUG_COEX(mvm, "RSSI for %pM is now %s\n", vif->bss_conf.bssid,
 871                        rssi_event == RSSI_EVENT_HIGH ? "HIGH" : "LOW");
 872
 873         /*
 874          * Check if rssi is good enough for reduced Tx power, but not in loose
 875          * scheme.
 876          */
 877         if (rssi_event == RSSI_EVENT_LOW || mvm->cfg->bt_shared_single_ant ||
 878             iwl_get_coex_type(mvm, vif) == BT_COEX_LOOSE_LUT)
 879                 ret = iwl_mvm_bt_coex_reduced_txp(mvm, mvmvif->ap_sta_id,
 880                                                   false);
 881         else
 882                 ret = iwl_mvm_bt_coex_reduced_txp(mvm, mvmvif->ap_sta_id, true);
 883
 884         if (ret)
 885                 IWL_ERR(mvm, "couldn't send BT_CONFIG HCMD upon RSSI event\n");
 886
 887         ieee80211_iterate_active_interfaces_atomic(
 888                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
 889                 iwl_mvm_bt_rssi_iterator, &data);
 890
 891         /*
 892          * If there are no BSS / P2P client interfaces, reduced Tx Power is
 893          * irrelevant since it is based on the RSSI coming from the beacon.
 894          * Use BT_KILL_MSK_DEFAULT in that case.
 895          */
 896         data.reduced_tx_power = data.reduced_tx_power && data.num_bss_ifaces;
 897
 898         if (iwl_mvm_bt_udpate_ctrl_kill_msk(mvm, data.reduced_tx_power))
 899                 IWL_ERR(mvm, "Failed to update the ctrl_kill_msk\n");
 900 }
 901
 902 #define LINK_QUAL_AGG_TIME_LIMIT_DEF    (4000)
 903 #define LINK_QUAL_AGG_TIME_LIMIT_BT_ACT (1200)
 904
 905 u16 iwl_mvm_bt_coex_agg_time_limit(struct iwl_mvm *mvm,
 906                                    struct ieee80211_sta *sta)
 907 {
 908         struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv;
 909         enum iwl_bt_coex_lut_type lut_type;
 910
 911         if (le32_to_cpu(mvm->last_bt_notif.bt_activity_grading) <
 912             BT_LOW_TRAFFIC)
 913                 return LINK_QUAL_AGG_TIME_LIMIT_DEF;
 914
 915         lut_type = iwl_get_coex_type(mvm, mvmsta->vif);
 916
 917         if (lut_type == BT_COEX_LOOSE_LUT)
 918                 return LINK_QUAL_AGG_TIME_LIMIT_DEF;
 919
 920         /* tight coex, high bt traffic, reduce AGG time limit */
 921         return LINK_QUAL_AGG_TIME_LIMIT_BT_ACT;
 922 }
 923
 924 bool iwl_mvm_bt_coex_is_mimo_allowed(struct iwl_mvm *mvm,
 925                                      struct ieee80211_sta *sta)
 926 {
 927         struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv;
 928
 929         if (le32_to_cpu(mvm->last_bt_notif.bt_activity_grading) <
 930             BT_HIGH_TRAFFIC)
 931                 return true;
 932
 933         /*
 934          * In Tight, BT can't Rx while we Tx, so use both antennas since BT is
 935          * already killed.
 936          * In Loose, BT can Rx while we Tx, so forbid MIMO to let BT Rx while we
 937          * Tx.
 938          */
 939         return iwl_get_coex_type(mvm, mvmsta->vif) == BT_COEX_TIGHT_LUT;
 940 }
 941
 942 void iwl_mvm_bt_coex_vif_change(struct iwl_mvm *mvm)
 943 {
 944         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_NEWBT_COEX))
 945                 return;
 946
 947         iwl_mvm_bt_coex_notif_handle(mvm);
 948 }