drivers/net/wireless/intel/iwlwifi/mvm/tt.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 - 2014 Intel Corporation. All rights reserved.
   9  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  10  * Copyright(c) 2015 - 2016 Intel Deutschland GmbH
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of version 2 of the GNU General Public License as
  14  * published by the Free Software Foundation.
  15  *
  16  * This program is distributed in the hope that it will be useful, but
  17  * WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19  * General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  24  * USA
  25  *
  26  * The full GNU General Public License is included in this distribution
  27  * in the file called COPYING.
  28  *
  29  * Contact Information:
  30  *  Intel Linux Wireless <linuxwifi@intel.com>
  31  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  32  *
  33  * BSD LICENSE
  34  *
  35  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  36  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  37  * Copyright(c) 2015 - 2016 Intel Deutschland GmbH
  38  * All rights reserved.
  39  *
  40  * Redistribution and use in source and binary forms, with or without
  41  * modification, are permitted provided that the following conditions
  42  * are met:
  43  *
  44  *  * Redistributions of source code must retain the above copyright
  45  *    notice, this list of conditions and the following disclaimer.
  46  *  * Redistributions in binary form must reproduce the above copyright
  47  *    notice, this list of conditions and the following disclaimer in
  48  *    the documentation and/or other materials provided with the
  49  *    distribution.
  50  *  * Neither the name Intel Corporation nor the names of its
  51  *    contributors may be used to endorse or promote products derived
  52  *    from this software without specific prior written permission.
  53  *
  54  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  55  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  56  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  57  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  58  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  59  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  60  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  61  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  62  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  63  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  64  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  65  *
  66  *****************************************************************************/
  67
  68 #include <linux/sort.h>
  69
  70 #include "mvm.h"
  71
  72 #define IWL_MVM_TEMP_NOTIF_WAIT_TIMEOUT HZ
  73
  74 static void iwl_mvm_enter_ctkill(struct iwl_mvm *mvm)
  75 {
  76         struct iwl_mvm_tt_mgmt *tt = &mvm->thermal_throttle;
  77         u32 duration = tt->params.ct_kill_duration;
  78
  79         if (test_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status))
  80                 return;
  81
  82         IWL_ERR(mvm, "Enter CT Kill\n");
  83         iwl_mvm_set_hw_ctkill_state(mvm, true);
  84
  85         if (!iwl_mvm_is_tt_in_fw(mvm)) {
  86                 tt->throttle = false;
  87                 tt->dynamic_smps = false;
  88         }
  89
  90         /* Don't schedule an exit work if we're in test mode, since
  91          * the temperature will not change unless we manually set it
  92          * again (or disable testing).
  93          */
  94         if (!mvm->temperature_test)
  95                 schedule_delayed_work(&tt->ct_kill_exit,
  96                                       round_jiffies_relative(duration * HZ));
  97 }
  98
  99 static void iwl_mvm_exit_ctkill(struct iwl_mvm *mvm)
 100 {
 101         if (!test_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status))
 102                 return;
 103
 104         IWL_ERR(mvm, "Exit CT Kill\n");
 105         iwl_mvm_set_hw_ctkill_state(mvm, false);
 106 }
 107
 108 void iwl_mvm_tt_temp_changed(struct iwl_mvm *mvm, u32 temp)
 109 {
 110         /* ignore the notification if we are in test mode */
 111         if (mvm->temperature_test)
 112                 return;
 113
 114         if (mvm->temperature == temp)
 115                 return;
 116
 117         mvm->temperature = temp;
 118         iwl_mvm_tt_handler(mvm);
 119 }
 120
 121 static int iwl_mvm_temp_notif_parse(struct iwl_mvm *mvm,
 122                                     struct iwl_rx_packet *pkt)
 123 {
 124         struct iwl_dts_measurement_notif_v1 *notif_v1;
 125         int len = iwl_rx_packet_payload_len(pkt);
 126         int temp;
 127
 128         /* we can use notif_v1 only, because v2 only adds an additional
 129          * parameter, which is not used in this function.
 130         */
 131         if (WARN_ON_ONCE(len < sizeof(*notif_v1))) {
 132                 IWL_ERR(mvm, "Invalid DTS_MEASUREMENT_NOTIFICATION\n");
 133                 return -EINVAL;
 134         }
 135
 136         notif_v1 = (void *)pkt->data;
 137
 138         temp = le32_to_cpu(notif_v1->temp);
 139
 140         /* shouldn't be negative, but since it's s32, make sure it isn't */
 141         if (WARN_ON_ONCE(temp < 0))
 142                 temp = 0;
 143
 144         IWL_DEBUG_TEMP(mvm, "DTS_MEASUREMENT_NOTIFICATION - %d\n", temp);
 145
 146         return temp;
 147 }
 148
 149 static bool iwl_mvm_temp_notif_wait(struct iwl_notif_wait_data *notif_wait,
 150                                     struct iwl_rx_packet *pkt, void *data)
 151 {
 152         struct iwl_mvm *mvm =
 153                 container_of(notif_wait, struct iwl_mvm, notif_wait);
 154         int *temp = data;
 155         int ret;
 156
 157         ret = iwl_mvm_temp_notif_parse(mvm, pkt);
 158         if (ret < 0)
 159                 return true;
 160
 161         *temp = ret;
 162
 163         return true;
 164 }
 165
 166 void iwl_mvm_temp_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
 167 {
 168         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 169         struct iwl_dts_measurement_notif_v2 *notif_v2;
 170         int len = iwl_rx_packet_payload_len(pkt);
 171         int temp;
 172         u32 ths_crossed;
 173
 174         /* the notification is handled synchronously in ctkill, so skip here */
 175         if (test_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status))
 176                 return;
 177
 178         temp = iwl_mvm_temp_notif_parse(mvm, pkt);
 179
 180         if (!iwl_mvm_is_tt_in_fw(mvm)) {
 181                 if (temp >= 0)
 182                         iwl_mvm_tt_temp_changed(mvm, temp);
 183                 return;
 184         }
 185
 186         if (WARN_ON_ONCE(len < sizeof(*notif_v2))) {
 187                 IWL_ERR(mvm, "Invalid DTS_MEASUREMENT_NOTIFICATION\n");
 188                 return;
 189         }
 190
 191         notif_v2 = (void *)pkt->data;
 192         ths_crossed = le32_to_cpu(notif_v2->threshold_idx);
 193
 194         /* 0xFF in ths_crossed means the notification is not related
 195          * to a trip, so we can ignore it here.
 196          */
 197         if (ths_crossed == 0xFF)
 198                 return;
 199
 200         IWL_DEBUG_TEMP(mvm, "Temp = %d Threshold crossed = %d\n",
 201                        temp, ths_crossed);
 202
 203 #ifdef CONFIG_THERMAL
 204         if (WARN_ON(ths_crossed >= IWL_MAX_DTS_TRIPS))
 205                 return;
 206
 207         /*
 208          * We are now handling a temperature notification from the firmware
 209          * in ASYNC and hold the mutex. thermal_notify_framework will call
 210          * us back through get_temp() which ought to send a SYNC command to
 211          * the firmware and hence to take the mutex.
 212          * Avoid the deadlock by unlocking the mutex here.
 213          */
 214         if (mvm->tz_device.tzone) {
 215                 struct iwl_mvm_thermal_device *tz_dev = &mvm->tz_device;
 216
 217                 mutex_unlock(&mvm->mutex);
 218                 thermal_notify_framework(tz_dev->tzone,
 219                                          tz_dev->fw_trips_index[ths_crossed]);
 220                 mutex_lock(&mvm->mutex);
 221         }
 222 #endif /* CONFIG_THERMAL */
 223 }
 224
 225 void iwl_mvm_ct_kill_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
 226 {
 227         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 228         struct ct_kill_notif *notif;
 229         int len = iwl_rx_packet_payload_len(pkt);
 230
 231         if (WARN_ON_ONCE(len != sizeof(*notif))) {
 232                 IWL_ERR(mvm, "Invalid CT_KILL_NOTIFICATION\n");
 233                 return;
 234         }
 235
 236         notif = (struct ct_kill_notif *)pkt->data;
 237         IWL_DEBUG_TEMP(mvm, "CT Kill notification temperature = %d\n",
 238                        notif->temperature);
 239
 240         iwl_mvm_enter_ctkill(mvm);
 241 }
 242
 243 static int iwl_mvm_get_temp_cmd(struct iwl_mvm *mvm)
 244 {
 245         struct iwl_dts_measurement_cmd cmd = {
 246                 .flags = cpu_to_le32(DTS_TRIGGER_CMD_FLAGS_TEMP),
 247         };
 248         struct iwl_ext_dts_measurement_cmd extcmd = {
 249                 .control_mode = cpu_to_le32(DTS_AUTOMATIC),
 250         };
 251         u32 cmdid;
 252
 253         if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_WIDE_CMD_HDR))
 254                 cmdid = iwl_cmd_id(CMD_DTS_MEASUREMENT_TRIGGER_WIDE,
 255                                    PHY_OPS_GROUP, 0);
 256         else
 257                 cmdid = CMD_DTS_MEASUREMENT_TRIGGER;
 258
 259         if (!fw_has_capa(&mvm->fw->ucode_capa,
 260                          IWL_UCODE_TLV_CAPA_EXTENDED_DTS_MEASURE))
 261                 return iwl_mvm_send_cmd_pdu(mvm, cmdid, 0, sizeof(cmd), &cmd);
 262
 263         return iwl_mvm_send_cmd_pdu(mvm, cmdid, 0, sizeof(extcmd), &extcmd);
 264 }
 265
 266 int iwl_mvm_get_temp(struct iwl_mvm *mvm, s32 *temp)
 267 {
 268         struct iwl_notification_wait wait_temp_notif;
 269         static u16 temp_notif[] = { WIDE_ID(PHY_OPS_GROUP,
 270                                             DTS_MEASUREMENT_NOTIF_WIDE) };
 271         int ret;
 272
 273         if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_WIDE_CMD_HDR))
 274                 temp_notif[0] = DTS_MEASUREMENT_NOTIFICATION;
 275
 276         lockdep_assert_held(&mvm->mutex);
 277
 278         iwl_init_notification_wait(&mvm->notif_wait, &wait_temp_notif,
 279                                    temp_notif, ARRAY_SIZE(temp_notif),
 280                                    iwl_mvm_temp_notif_wait, temp);
 281
 282         ret = iwl_mvm_get_temp_cmd(mvm);
 283         if (ret) {
 284                 IWL_ERR(mvm, "Failed to get the temperature (err=%d)\n", ret);
 285                 iwl_remove_notification(&mvm->notif_wait, &wait_temp_notif);
 286                 return ret;
 287         }
 288
 289         ret = iwl_wait_notification(&mvm->notif_wait, &wait_temp_notif,
 290                                     IWL_MVM_TEMP_NOTIF_WAIT_TIMEOUT);
 291         if (ret)
 292                 IWL_ERR(mvm, "Getting the temperature timed out\n");
 293
 294         return ret;
 295 }
 296
 297 static void check_exit_ctkill(struct work_struct *work)
 298 {
 299         struct iwl_mvm_tt_mgmt *tt;
 300         struct iwl_mvm *mvm;
 301         u32 duration;
 302         s32 temp;
 303         int ret;
 304
 305         tt = container_of(work, struct iwl_mvm_tt_mgmt, ct_kill_exit.work);
 306         mvm = container_of(tt, struct iwl_mvm, thermal_throttle);
 307
 308         if (iwl_mvm_is_tt_in_fw(mvm)) {
 309                 iwl_mvm_exit_ctkill(mvm);
 310
 311                 return;
 312         }
 313
 314         duration = tt->params.ct_kill_duration;
 315
 316         mutex_lock(&mvm->mutex);
 317
 318         if (__iwl_mvm_mac_start(mvm))
 319                 goto reschedule;
 320
 321         /* make sure the device is available for direct read/writes */
 322         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_CHECK_CTKILL)) {
 323                 __iwl_mvm_mac_stop(mvm);
 324                 goto reschedule;
 325         }
 326
 327         ret = iwl_mvm_get_temp(mvm, &temp);
 328
 329         iwl_mvm_unref(mvm, IWL_MVM_REF_CHECK_CTKILL);
 330
 331         __iwl_mvm_mac_stop(mvm);
 332
 333         if (ret)
 334                 goto reschedule;
 335
 336         IWL_DEBUG_TEMP(mvm, "NIC temperature: %d\n", temp);
 337
 338         if (temp <= tt->params.ct_kill_exit) {
 339                 mutex_unlock(&mvm->mutex);
 340                 iwl_mvm_exit_ctkill(mvm);
 341                 return;
 342         }
 343
 344 reschedule:
 345         mutex_unlock(&mvm->mutex);
 346         schedule_delayed_work(&mvm->thermal_throttle.ct_kill_exit,
 347                               round_jiffies(duration * HZ));
 348 }
 349
 350 static void iwl_mvm_tt_smps_iterator(void *_data, u8 *mac,
 351                                      struct ieee80211_vif *vif)
 352 {
 353         struct iwl_mvm *mvm = _data;
 354         enum ieee80211_smps_mode smps_mode;
 355
 356         lockdep_assert_held(&mvm->mutex);
 357
 358         if (mvm->thermal_throttle.dynamic_smps)
 359                 smps_mode = IEEE80211_SMPS_DYNAMIC;
 360         else
 361                 smps_mode = IEEE80211_SMPS_AUTOMATIC;
 362
 363         if (vif->type != NL80211_IFTYPE_STATION)
 364                 return;
 365
 366         iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT, smps_mode);
 367 }
 368
 369 static void iwl_mvm_tt_tx_protection(struct iwl_mvm *mvm, bool enable)
 370 {
 371         struct ieee80211_sta *sta;
 372         struct iwl_mvm_sta *mvmsta;
 373         int i, err;
 374
 375         for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
 376                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
 377                                                 lockdep_is_held(&mvm->mutex));
 378                 if (IS_ERR_OR_NULL(sta))
 379                         continue;
 380                 mvmsta = iwl_mvm_sta_from_mac80211(sta);
 381                 if (enable == mvmsta->tt_tx_protection)
 382                         continue;
 383                 err = iwl_mvm_tx_protection(mvm, mvmsta, enable);
 384                 if (err) {
 385                         IWL_ERR(mvm, "Failed to %s Tx protection\n",
 386                                 enable ? "enable" : "disable");
 387                 } else {
 388                         IWL_DEBUG_TEMP(mvm, "%s Tx protection\n",
 389                                        enable ? "Enable" : "Disable");
 390                         mvmsta->tt_tx_protection = enable;
 391                 }
 392         }
 393 }
 394
 395 void iwl_mvm_tt_tx_backoff(struct iwl_mvm *mvm, u32 backoff)
 396 {
 397         struct iwl_host_cmd cmd = {
 398                 .id = REPLY_THERMAL_MNG_BACKOFF,
 399                 .len = { sizeof(u32), },
 400                 .data = { &backoff, },
 401         };
 402
 403         backoff = max(backoff, mvm->thermal_throttle.min_backoff);
 404
 405         if (iwl_mvm_send_cmd(mvm, &cmd) == 0) {
 406                 IWL_DEBUG_TEMP(mvm, "Set Thermal Tx backoff to: %u\n",
 407                                backoff);
 408                 mvm->thermal_throttle.tx_backoff = backoff;
 409         } else {
 410                 IWL_ERR(mvm, "Failed to change Thermal Tx backoff\n");
 411         }
 412 }
 413
 414 void iwl_mvm_tt_handler(struct iwl_mvm *mvm)
 415 {
 416         struct iwl_tt_params *params = &mvm->thermal_throttle.params;
 417         struct iwl_mvm_tt_mgmt *tt = &mvm->thermal_throttle;
 418         s32 temperature = mvm->temperature;
 419         bool throttle_enable = false;
 420         int i;
 421         u32 tx_backoff;
 422
 423         IWL_DEBUG_TEMP(mvm, "NIC temperature: %d\n", mvm->temperature);
 424
 425         if (params->support_ct_kill && temperature >= params->ct_kill_entry) {
 426                 iwl_mvm_enter_ctkill(mvm);
 427                 return;
 428         }
 429
 430         if (params->support_ct_kill &&
 431             temperature <= params->ct_kill_exit) {
 432                 iwl_mvm_exit_ctkill(mvm);
 433                 return;
 434         }
 435
 436         if (params->support_dynamic_smps) {
 437                 if (!tt->dynamic_smps &&
 438                     temperature >= params->dynamic_smps_entry) {
 439                         IWL_DEBUG_TEMP(mvm, "Enable dynamic SMPS\n");
 440                         tt->dynamic_smps = true;
 441                         ieee80211_iterate_active_interfaces_atomic(
 442                                         mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
 443                                         iwl_mvm_tt_smps_iterator, mvm);
 444                         throttle_enable = true;
 445                 } else if (tt->dynamic_smps &&
 446                            temperature <= params->dynamic_smps_exit) {
 447                         IWL_DEBUG_TEMP(mvm, "Disable dynamic SMPS\n");
 448                         tt->dynamic_smps = false;
 449                         ieee80211_iterate_active_interfaces_atomic(
 450                                         mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
 451                                         iwl_mvm_tt_smps_iterator, mvm);
 452                 }
 453         }
 454
 455         if (params->support_tx_protection) {
 456                 if (temperature >= params->tx_protection_entry) {
 457                         iwl_mvm_tt_tx_protection(mvm, true);
 458                         throttle_enable = true;
 459                 } else if (temperature <= params->tx_protection_exit) {
 460                         iwl_mvm_tt_tx_protection(mvm, false);
 461                 }
 462         }
 463
 464         if (params->support_tx_backoff) {
 465                 tx_backoff = tt->min_backoff;
 466                 for (i = 0; i < TT_TX_BACKOFF_SIZE; i++) {
 467                         if (temperature < params->tx_backoff[i].temperature)
 468                                 break;
 469                         tx_backoff = max(tt->min_backoff,
 470                                          params->tx_backoff[i].backoff);
 471                 }
 472                 if (tx_backoff != tt->min_backoff)
 473                         throttle_enable = true;
 474                 if (tt->tx_backoff != tx_backoff)
 475                         iwl_mvm_tt_tx_backoff(mvm, tx_backoff);
 476         }
 477
 478         if (!tt->throttle && throttle_enable) {
 479                 IWL_WARN(mvm,
 480                          "Due to high temperature thermal throttling initiated\n");
 481                 tt->throttle = true;
 482         } else if (tt->throttle && !tt->dynamic_smps &&
 483                    tt->tx_backoff == tt->min_backoff &&
 484                    temperature <= params->tx_protection_exit) {
 485                 IWL_WARN(mvm,
 486                          "Temperature is back to normal thermal throttling stopped\n");
 487                 tt->throttle = false;
 488         }
 489 }
 490
 491 static const struct iwl_tt_params iwl_mvm_default_tt_params = {
 492         .ct_kill_entry = 118,
 493         .ct_kill_exit = 96,
 494         .ct_kill_duration = 5,
 495         .dynamic_smps_entry = 114,
 496         .dynamic_smps_exit = 110,
 497         .tx_protection_entry = 114,
 498         .tx_protection_exit = 108,
 499         .tx_backoff = {
 500                 {.temperature = 112, .backoff = 200},
 501                 {.temperature = 113, .backoff = 600},
 502                 {.temperature = 114, .backoff = 1200},
 503                 {.temperature = 115, .backoff = 2000},
 504                 {.temperature = 116, .backoff = 4000},
 505                 {.temperature = 117, .backoff = 10000},
 506         },
 507         .support_ct_kill = true,
 508         .support_dynamic_smps = true,
 509         .support_tx_protection = true,
 510         .support_tx_backoff = true,
 511 };
 512
 513 int iwl_mvm_ctdp_command(struct iwl_mvm *mvm, u32 op, u32 budget)
 514 {
 515         struct iwl_mvm_ctdp_cmd cmd = {
 516                 .operation = cpu_to_le32(op),
 517                 .budget = cpu_to_le32(budget),
 518                 .window_size = 0,
 519         };
 520         int ret;
 521         u32 status;
 522
 523         lockdep_assert_held(&mvm->mutex);
 524
 525         ret = iwl_mvm_send_cmd_pdu_status(mvm, WIDE_ID(PHY_OPS_GROUP,
 526                                                        CTDP_CONFIG_CMD),
 527                                           sizeof(cmd), &cmd, &status);
 528
 529         if (ret) {
 530                 IWL_ERR(mvm, "cTDP command failed (err=%d)\n", ret);
 531                 return ret;
 532         }
 533
 534         switch (op) {
 535         case CTDP_CMD_OPERATION_START:
 536 #ifdef CONFIG_THERMAL
 537                 mvm->cooling_dev.cur_state = budget;
 538 #endif /* CONFIG_THERMAL */
 539                 break;
 540         case CTDP_CMD_OPERATION_REPORT:
 541                 IWL_DEBUG_TEMP(mvm, "cTDP avg energy in mWatt = %d\n", status);
 542                 /* when the function is called with CTDP_CMD_OPERATION_REPORT
 543                  * option the function should return the average budget value
 544                  * that is received from the FW.
 545                  * The budget can't be less or equal to 0, so it's possible
 546                  * to distinguish between error values and budgets.
 547                  */
 548                 return status;
 549         case CTDP_CMD_OPERATION_STOP:
 550                 IWL_DEBUG_TEMP(mvm, "cTDP stopped successfully\n");
 551                 break;
 552         }
 553
 554         return 0;
 555 }
 556
 557 #ifdef CONFIG_THERMAL
 558 static int compare_temps(const void *a, const void *b)
 559 {
 560         return ((s16)le16_to_cpu(*(__le16 *)a) -
 561                 (s16)le16_to_cpu(*(__le16 *)b));
 562 }
 563
 564 int iwl_mvm_send_temp_report_ths_cmd(struct iwl_mvm *mvm)
 565 {
 566         struct temp_report_ths_cmd cmd = {0};
 567         int ret, i, j, idx = 0;
 568
 569         lockdep_assert_held(&mvm->mutex);
 570
 571         if (!mvm->tz_device.tzone)
 572                 return -EINVAL;
 573
 574         /* The driver holds array of temperature trips that are unsorted
 575          * and uncompressed, the FW should get it compressed and sorted
 576          */
 577
 578         /* compress temp_trips to cmd array, remove uninitialized values*/
 579         for (i = 0; i < IWL_MAX_DTS_TRIPS; i++) {
 580                 if (mvm->tz_device.temp_trips[i] != S16_MIN) {
 581                         cmd.thresholds[idx++] =
 582                                 cpu_to_le16(mvm->tz_device.temp_trips[i]);
 583                 }
 584         }
 585         cmd.num_temps = cpu_to_le32(idx);
 586
 587         if (!idx)
 588                 goto send;
 589
 590         /*sort cmd array*/
 591         sort(cmd.thresholds, idx, sizeof(s16), compare_temps, NULL);
 592
 593         /* we should save the indexes of trips because we sort
 594          * and compress the orginal array
 595          */
 596         for (i = 0; i < idx; i++) {
 597                 for (j = 0; j < IWL_MAX_DTS_TRIPS; j++) {
 598                         if (le16_to_cpu(cmd.thresholds[i]) ==
 599                                 mvm->tz_device.temp_trips[j])
 600                                 mvm->tz_device.fw_trips_index[i] = j;
 601                 }
 602         }
 603
 604 send:
 605         ret = iwl_mvm_send_cmd_pdu(mvm, WIDE_ID(PHY_OPS_GROUP,
 606                                                 TEMP_REPORTING_THRESHOLDS_CMD),
 607                                    0, sizeof(cmd), &cmd);
 608         if (ret)
 609                 IWL_ERR(mvm, "TEMP_REPORT_THS_CMD command failed (err=%d)\n",
 610                         ret);
 611
 612         return ret;
 613 }
 614
 615 static int iwl_mvm_tzone_get_temp(struct thermal_zone_device *device,
 616                                   int *temperature)
 617 {
 618         struct iwl_mvm *mvm = (struct iwl_mvm *)device->devdata;
 619         int ret;
 620         int temp;
 621
 622         mutex_lock(&mvm->mutex);
 623
 624         if (!mvm->ucode_loaded || !(mvm->cur_ucode == IWL_UCODE_REGULAR)) {
 625                 ret = -EIO;
 626                 goto out;
 627         }
 628
 629         ret = iwl_mvm_get_temp(mvm, &temp);
 630         if (ret)
 631                 goto out;
 632
 633         *temperature = temp * 1000;
 634
 635 out:
 636         mutex_unlock(&mvm->mutex);
 637         return ret;
 638 }
 639
 640 static int iwl_mvm_tzone_get_trip_temp(struct thermal_zone_device *device,
 641                                        int trip, int *temp)
 642 {
 643         struct iwl_mvm *mvm = (struct iwl_mvm *)device->devdata;
 644
 645         if (trip < 0 || trip >= IWL_MAX_DTS_TRIPS)
 646                 return -EINVAL;
 647
 648         *temp = mvm->tz_device.temp_trips[trip] * 1000;
 649
 650         return 0;
 651 }
 652
 653 static int iwl_mvm_tzone_get_trip_type(struct thermal_zone_device *device,
 654                                        int trip, enum thermal_trip_type *type)
 655 {
 656         if (trip < 0 || trip >= IWL_MAX_DTS_TRIPS)
 657                 return -EINVAL;
 658
 659         *type = THERMAL_TRIP_PASSIVE;
 660
 661         return 0;
 662 }
 663
 664 static int iwl_mvm_tzone_set_trip_temp(struct thermal_zone_device *device,
 665                                        int trip, int temp)
 666 {
 667         struct iwl_mvm *mvm = (struct iwl_mvm *)device->devdata;
 668         struct iwl_mvm_thermal_device *tzone;
 669         int i, ret;
 670         s16 temperature;
 671
 672         mutex_lock(&mvm->mutex);
 673
 674         if (!mvm->ucode_loaded || !(mvm->cur_ucode == IWL_UCODE_REGULAR)) {
 675                 ret = -EIO;
 676                 goto out;
 677         }
 678
 679         if (trip < 0 || trip >= IWL_MAX_DTS_TRIPS) {
 680                 ret = -EINVAL;
 681                 goto out;
 682         }
 683
 684         if ((temp / 1000) > S16_MAX) {
 685                 ret = -EINVAL;
 686                 goto out;
 687         }
 688
 689         temperature = (s16)(temp / 1000);
 690         tzone = &mvm->tz_device;
 691
 692         if (!tzone) {
 693                 ret = -EIO;
 694                 goto out;
 695         }
 696
 697         /* no updates*/
 698         if (tzone->temp_trips[trip] == temperature) {
 699                 ret = 0;
 700                 goto out;
 701         }
 702
 703         /* already existing temperature */
 704         for (i = 0; i < IWL_MAX_DTS_TRIPS; i++) {
 705                 if (tzone->temp_trips[i] == temperature) {
 706                         ret = -EINVAL;
 707                         goto out;
 708                 }
 709         }
 710
 711         tzone->temp_trips[trip] = temperature;
 712
 713         ret = iwl_mvm_send_temp_report_ths_cmd(mvm);
 714 out:
 715         mutex_unlock(&mvm->mutex);
 716         return ret;
 717 }
 718
 719 static  struct thermal_zone_device_ops tzone_ops = {
 720         .get_temp = iwl_mvm_tzone_get_temp,
 721         .get_trip_temp = iwl_mvm_tzone_get_trip_temp,
 722         .get_trip_type = iwl_mvm_tzone_get_trip_type,
 723         .set_trip_temp = iwl_mvm_tzone_set_trip_temp,
 724 };
 725
 726 /* make all trips writable */
 727 #define IWL_WRITABLE_TRIPS_MSK (BIT(IWL_MAX_DTS_TRIPS) - 1)
 728
 729 static void iwl_mvm_thermal_zone_register(struct iwl_mvm *mvm)
 730 {
 731         int i;
 732         char name[] = "iwlwifi";
 733
 734         if (!iwl_mvm_is_tt_in_fw(mvm)) {
 735                 mvm->tz_device.tzone = NULL;
 736
 737                 return;
 738         }
 739
 740         BUILD_BUG_ON(ARRAY_SIZE(name) >= THERMAL_NAME_LENGTH);
 741
 742         mvm->tz_device.tzone = thermal_zone_device_register(name,
 743                                                         IWL_MAX_DTS_TRIPS,
 744                                                         IWL_WRITABLE_TRIPS_MSK,
 745                                                         mvm, &tzone_ops,
 746                                                         NULL, 0, 0);
 747         if (IS_ERR(mvm->tz_device.tzone)) {
 748                 IWL_DEBUG_TEMP(mvm,
 749                                "Failed to register to thermal zone (err = %ld)\n",
 750                                PTR_ERR(mvm->tz_device.tzone));
 751                 mvm->tz_device.tzone = NULL;
 752                 return;
 753         }
 754
 755         /* 0 is a valid temperature,
 756          * so initialize the array with S16_MIN which invalid temperature
 757          */
 758         for (i = 0 ; i < IWL_MAX_DTS_TRIPS; i++)
 759                 mvm->tz_device.temp_trips[i] = S16_MIN;
 760 }
 761
 762 static const u32 iwl_mvm_cdev_budgets[] = {
 763         2000,   /* cooling state 0 */
 764         1800,   /* cooling state 1 */
 765         1600,   /* cooling state 2 */
 766         1400,   /* cooling state 3 */
 767         1200,   /* cooling state 4 */
 768         1000,   /* cooling state 5 */
 769         900,    /* cooling state 6 */
 770         800,    /* cooling state 7 */
 771         700,    /* cooling state 8 */
 772         650,    /* cooling state 9 */
 773         600,    /* cooling state 10 */
 774         550,    /* cooling state 11 */
 775         500,    /* cooling state 12 */
 776         450,    /* cooling state 13 */
 777         400,    /* cooling state 14 */
 778         350,    /* cooling state 15 */
 779         300,    /* cooling state 16 */
 780         250,    /* cooling state 17 */
 781         200,    /* cooling state 18 */
 782         150,    /* cooling state 19 */
 783 };
 784
 785 static int iwl_mvm_tcool_get_max_state(struct thermal_cooling_device *cdev,
 786                                        unsigned long *state)
 787 {
 788         *state = ARRAY_SIZE(iwl_mvm_cdev_budgets) - 1;
 789
 790         return 0;
 791 }
 792
 793 static int iwl_mvm_tcool_get_cur_state(struct thermal_cooling_device *cdev,
 794                                        unsigned long *state)
 795 {
 796         struct iwl_mvm *mvm = (struct iwl_mvm *)(cdev->devdata);
 797
 798         if (test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status))
 799                 return -EBUSY;
 800
 801         *state = mvm->cooling_dev.cur_state;
 802         return 0;
 803 }
 804
 805 static int iwl_mvm_tcool_set_cur_state(struct thermal_cooling_device *cdev,
 806                                        unsigned long new_state)
 807 {
 808         struct iwl_mvm *mvm = (struct iwl_mvm *)(cdev->devdata);
 809         int ret;
 810
 811         if (!mvm->ucode_loaded || !(mvm->cur_ucode == IWL_UCODE_REGULAR))
 812                 return -EIO;
 813
 814         if (test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status))
 815                 return -EBUSY;
 816
 817         mutex_lock(&mvm->mutex);
 818
 819         if (new_state >= ARRAY_SIZE(iwl_mvm_cdev_budgets)) {
 820                 ret = -EINVAL;
 821                 goto unlock;
 822         }
 823
 824         ret = iwl_mvm_ctdp_command(mvm, CTDP_CMD_OPERATION_START,
 825                                    iwl_mvm_cdev_budgets[new_state]);
 826
 827 unlock:
 828         mutex_unlock(&mvm->mutex);
 829         return ret;
 830 }
 831
 832 static struct thermal_cooling_device_ops tcooling_ops = {
 833         .get_max_state = iwl_mvm_tcool_get_max_state,
 834         .get_cur_state = iwl_mvm_tcool_get_cur_state,
 835         .set_cur_state = iwl_mvm_tcool_set_cur_state,
 836 };
 837
 838 static void iwl_mvm_cooling_device_register(struct iwl_mvm *mvm)
 839 {
 840         char name[] = "iwlwifi";
 841
 842         if (!iwl_mvm_is_ctdp_supported(mvm))
 843                 return;
 844
 845         BUILD_BUG_ON(ARRAY_SIZE(name) >= THERMAL_NAME_LENGTH);
 846
 847         mvm->cooling_dev.cdev =
 848                 thermal_cooling_device_register(name,
 849                                                 mvm,
 850                                                 &tcooling_ops);
 851
 852         if (IS_ERR(mvm->cooling_dev.cdev)) {
 853                 IWL_DEBUG_TEMP(mvm,
 854                                "Failed to register to cooling device (err = %ld)\n",
 855                                PTR_ERR(mvm->cooling_dev.cdev));
 856                 mvm->cooling_dev.cdev = NULL;
 857                 return;
 858         }
 859 }
 860
 861 static void iwl_mvm_thermal_zone_unregister(struct iwl_mvm *mvm)
 862 {
 863         if (!iwl_mvm_is_tt_in_fw(mvm) || !mvm->tz_device.tzone)
 864                 return;
 865
 866         IWL_DEBUG_TEMP(mvm, "Thermal zone device unregister\n");
 867         thermal_zone_device_unregister(mvm->tz_device.tzone);
 868         mvm->tz_device.tzone = NULL;
 869 }
 870
 871 static void iwl_mvm_cooling_device_unregister(struct iwl_mvm *mvm)
 872 {
 873         if (!iwl_mvm_is_ctdp_supported(mvm) || !mvm->cooling_dev.cdev)
 874                 return;
 875
 876         IWL_DEBUG_TEMP(mvm, "Cooling device unregister\n");
 877         thermal_cooling_device_unregister(mvm->cooling_dev.cdev);
 878         mvm->cooling_dev.cdev = NULL;
 879 }
 880 #endif /* CONFIG_THERMAL */
 881
 882 void iwl_mvm_thermal_initialize(struct iwl_mvm *mvm, u32 min_backoff)
 883 {
 884         struct iwl_mvm_tt_mgmt *tt = &mvm->thermal_throttle;
 885
 886         IWL_DEBUG_TEMP(mvm, "Initialize Thermal Throttling\n");
 887
 888         if (mvm->cfg->thermal_params)
 889                 tt->params = *mvm->cfg->thermal_params;
 890         else
 891                 tt->params = iwl_mvm_default_tt_params;
 892
 893         tt->throttle = false;
 894         tt->dynamic_smps = false;
 895         tt->min_backoff = min_backoff;
 896         INIT_DELAYED_WORK(&tt->ct_kill_exit, check_exit_ctkill);
 897
 898 #ifdef CONFIG_THERMAL
 899         iwl_mvm_cooling_device_register(mvm);
 900         iwl_mvm_thermal_zone_register(mvm);
 901 #endif
 902 }
 903
 904 void iwl_mvm_thermal_exit(struct iwl_mvm *mvm)
 905 {
 906         cancel_delayed_work_sync(&mvm->thermal_throttle.ct_kill_exit);
 907         IWL_DEBUG_TEMP(mvm, "Exit Thermal Throttling\n");
 908
 909 #ifdef CONFIG_THERMAL
 910         iwl_mvm_cooling_device_unregister(mvm);
 911         iwl_mvm_thermal_zone_unregister(mvm);
 912 #endif
 913 }