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
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  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
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  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         if (mvm->tz_device.tzone) {
 208                 struct iwl_mvm_thermal_device *tz_dev = &mvm->tz_device;
 209
 210                 thermal_notify_framework(tz_dev->tzone,
 211                                          tz_dev->fw_trips_index[ths_crossed]);
 212         }
 213 #endif /* CONFIG_THERMAL */
 214 }
 215
 216 void iwl_mvm_ct_kill_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
 217 {
 218         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 219         struct ct_kill_notif *notif;
 220         int len = iwl_rx_packet_payload_len(pkt);
 221
 222         if (WARN_ON_ONCE(len != sizeof(*notif))) {
 223                 IWL_ERR(mvm, "Invalid CT_KILL_NOTIFICATION\n");
 224                 return;
 225         }
 226
 227         notif = (struct ct_kill_notif *)pkt->data;
 228         IWL_DEBUG_TEMP(mvm, "CT Kill notification temperature = %d\n",
 229                        notif->temperature);
 230
 231         iwl_mvm_enter_ctkill(mvm);
 232 }
 233
 234 static int iwl_mvm_get_temp_cmd(struct iwl_mvm *mvm)
 235 {
 236         struct iwl_dts_measurement_cmd cmd = {
 237                 .flags = cpu_to_le32(DTS_TRIGGER_CMD_FLAGS_TEMP),
 238         };
 239         struct iwl_ext_dts_measurement_cmd extcmd = {
 240                 .control_mode = cpu_to_le32(DTS_AUTOMATIC),
 241         };
 242         u32 cmdid;
 243
 244         cmdid = iwl_cmd_id(CMD_DTS_MEASUREMENT_TRIGGER_WIDE,
 245                            PHY_OPS_GROUP, 0);
 246
 247         if (!fw_has_capa(&mvm->fw->ucode_capa,
 248                          IWL_UCODE_TLV_CAPA_EXTENDED_DTS_MEASURE))
 249                 return iwl_mvm_send_cmd_pdu(mvm, cmdid, 0, sizeof(cmd), &cmd);
 250
 251         return iwl_mvm_send_cmd_pdu(mvm, cmdid, 0, sizeof(extcmd), &extcmd);
 252 }
 253
 254 int iwl_mvm_get_temp(struct iwl_mvm *mvm, s32 *temp)
 255 {
 256         struct iwl_notification_wait wait_temp_notif;
 257         static u16 temp_notif[] = { WIDE_ID(PHY_OPS_GROUP,
 258                                             DTS_MEASUREMENT_NOTIF_WIDE) };
 259         int ret;
 260
 261         lockdep_assert_held(&mvm->mutex);
 262
 263         iwl_init_notification_wait(&mvm->notif_wait, &wait_temp_notif,
 264                                    temp_notif, ARRAY_SIZE(temp_notif),
 265                                    iwl_mvm_temp_notif_wait, temp);
 266
 267         ret = iwl_mvm_get_temp_cmd(mvm);
 268         if (ret) {
 269                 IWL_ERR(mvm, "Failed to get the temperature (err=%d)\n", ret);
 270                 iwl_remove_notification(&mvm->notif_wait, &wait_temp_notif);
 271                 return ret;
 272         }
 273
 274         ret = iwl_wait_notification(&mvm->notif_wait, &wait_temp_notif,
 275                                     IWL_MVM_TEMP_NOTIF_WAIT_TIMEOUT);
 276         if (ret)
 277                 IWL_ERR(mvm, "Getting the temperature timed out\n");
 278
 279         return ret;
 280 }
 281
 282 static void check_exit_ctkill(struct work_struct *work)
 283 {
 284         struct iwl_mvm_tt_mgmt *tt;
 285         struct iwl_mvm *mvm;
 286         u32 duration;
 287         s32 temp;
 288         int ret;
 289
 290         tt = container_of(work, struct iwl_mvm_tt_mgmt, ct_kill_exit.work);
 291         mvm = container_of(tt, struct iwl_mvm, thermal_throttle);
 292
 293         if (iwl_mvm_is_tt_in_fw(mvm)) {
 294                 iwl_mvm_exit_ctkill(mvm);
 295
 296                 return;
 297         }
 298
 299         duration = tt->params.ct_kill_duration;
 300
 301         mutex_lock(&mvm->mutex);
 302
 303         if (__iwl_mvm_mac_start(mvm))
 304                 goto reschedule;
 305
 306         /* make sure the device is available for direct read/writes */
 307         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_CHECK_CTKILL)) {
 308                 __iwl_mvm_mac_stop(mvm);
 309                 goto reschedule;
 310         }
 311
 312         ret = iwl_mvm_get_temp(mvm, &temp);
 313
 314         iwl_mvm_unref(mvm, IWL_MVM_REF_CHECK_CTKILL);
 315
 316         __iwl_mvm_mac_stop(mvm);
 317
 318         if (ret)
 319                 goto reschedule;
 320
 321         IWL_DEBUG_TEMP(mvm, "NIC temperature: %d\n", temp);
 322
 323         if (temp <= tt->params.ct_kill_exit) {
 324                 mutex_unlock(&mvm->mutex);
 325                 iwl_mvm_exit_ctkill(mvm);
 326                 return;
 327         }
 328
 329 reschedule:
 330         mutex_unlock(&mvm->mutex);
 331         schedule_delayed_work(&mvm->thermal_throttle.ct_kill_exit,
 332                               round_jiffies(duration * HZ));
 333 }
 334
 335 static void iwl_mvm_tt_smps_iterator(void *_data, u8 *mac,
 336                                      struct ieee80211_vif *vif)
 337 {
 338         struct iwl_mvm *mvm = _data;
 339         enum ieee80211_smps_mode smps_mode;
 340
 341         lockdep_assert_held(&mvm->mutex);
 342
 343         if (mvm->thermal_throttle.dynamic_smps)
 344                 smps_mode = IEEE80211_SMPS_DYNAMIC;
 345         else
 346                 smps_mode = IEEE80211_SMPS_AUTOMATIC;
 347
 348         if (vif->type != NL80211_IFTYPE_STATION)
 349                 return;
 350
 351         iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT, smps_mode);
 352 }
 353
 354 static void iwl_mvm_tt_tx_protection(struct iwl_mvm *mvm, bool enable)
 355 {
 356         struct iwl_mvm_sta *mvmsta;
 357         int i, err;
 358
 359         for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
 360                 mvmsta = iwl_mvm_sta_from_staid_protected(mvm, i);
 361                 if (!mvmsta)
 362                         continue;
 363
 364                 if (enable == mvmsta->tt_tx_protection)
 365                         continue;
 366                 err = iwl_mvm_tx_protection(mvm, mvmsta, enable);
 367                 if (err) {
 368                         IWL_ERR(mvm, "Failed to %s Tx protection\n",
 369                                 enable ? "enable" : "disable");
 370                 } else {
 371                         IWL_DEBUG_TEMP(mvm, "%s Tx protection\n",
 372                                        enable ? "Enable" : "Disable");
 373                         mvmsta->tt_tx_protection = enable;
 374                 }
 375         }
 376 }
 377
 378 void iwl_mvm_tt_tx_backoff(struct iwl_mvm *mvm, u32 backoff)
 379 {
 380         struct iwl_host_cmd cmd = {
 381                 .id = REPLY_THERMAL_MNG_BACKOFF,
 382                 .len = { sizeof(u32), },
 383                 .data = { &backoff, },
 384         };
 385
 386         backoff = max(backoff, mvm->thermal_throttle.min_backoff);
 387
 388         if (iwl_mvm_send_cmd(mvm, &cmd) == 0) {
 389                 IWL_DEBUG_TEMP(mvm, "Set Thermal Tx backoff to: %u\n",
 390                                backoff);
 391                 mvm->thermal_throttle.tx_backoff = backoff;
 392         } else {
 393                 IWL_ERR(mvm, "Failed to change Thermal Tx backoff\n");
 394         }
 395 }
 396
 397 void iwl_mvm_tt_handler(struct iwl_mvm *mvm)
 398 {
 399         struct iwl_tt_params *params = &mvm->thermal_throttle.params;
 400         struct iwl_mvm_tt_mgmt *tt = &mvm->thermal_throttle;
 401         s32 temperature = mvm->temperature;
 402         bool throttle_enable = false;
 403         int i;
 404         u32 tx_backoff;
 405
 406         IWL_DEBUG_TEMP(mvm, "NIC temperature: %d\n", mvm->temperature);
 407
 408         if (params->support_ct_kill && temperature >= params->ct_kill_entry) {
 409                 iwl_mvm_enter_ctkill(mvm);
 410                 return;
 411         }
 412
 413         if (params->support_ct_kill &&
 414             temperature <= params->ct_kill_exit) {
 415                 iwl_mvm_exit_ctkill(mvm);
 416                 return;
 417         }
 418
 419         if (params->support_dynamic_smps) {
 420                 if (!tt->dynamic_smps &&
 421                     temperature >= params->dynamic_smps_entry) {
 422                         IWL_DEBUG_TEMP(mvm, "Enable dynamic SMPS\n");
 423                         tt->dynamic_smps = true;
 424                         ieee80211_iterate_active_interfaces_atomic(
 425                                         mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
 426                                         iwl_mvm_tt_smps_iterator, mvm);
 427                         throttle_enable = true;
 428                 } else if (tt->dynamic_smps &&
 429                            temperature <= params->dynamic_smps_exit) {
 430                         IWL_DEBUG_TEMP(mvm, "Disable dynamic SMPS\n");
 431                         tt->dynamic_smps = false;
 432                         ieee80211_iterate_active_interfaces_atomic(
 433                                         mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
 434                                         iwl_mvm_tt_smps_iterator, mvm);
 435                 }
 436         }
 437
 438         if (params->support_tx_protection) {
 439                 if (temperature >= params->tx_protection_entry) {
 440                         iwl_mvm_tt_tx_protection(mvm, true);
 441                         throttle_enable = true;
 442                 } else if (temperature <= params->tx_protection_exit) {
 443                         iwl_mvm_tt_tx_protection(mvm, false);
 444                 }
 445         }
 446
 447         if (params->support_tx_backoff) {
 448                 tx_backoff = tt->min_backoff;
 449                 for (i = 0; i < TT_TX_BACKOFF_SIZE; i++) {
 450                         if (temperature < params->tx_backoff[i].temperature)
 451                                 break;
 452                         tx_backoff = max(tt->min_backoff,
 453                                          params->tx_backoff[i].backoff);
 454                 }
 455                 if (tx_backoff != tt->min_backoff)
 456                         throttle_enable = true;
 457                 if (tt->tx_backoff != tx_backoff)
 458                         iwl_mvm_tt_tx_backoff(mvm, tx_backoff);
 459         }
 460
 461         if (!tt->throttle && throttle_enable) {
 462                 IWL_WARN(mvm,
 463                          "Due to high temperature thermal throttling initiated\n");
 464                 tt->throttle = true;
 465         } else if (tt->throttle && !tt->dynamic_smps &&
 466                    tt->tx_backoff == tt->min_backoff &&
 467                    temperature <= params->tx_protection_exit) {
 468                 IWL_WARN(mvm,
 469                          "Temperature is back to normal thermal throttling stopped\n");
 470                 tt->throttle = false;
 471         }
 472 }
 473
 474 static const struct iwl_tt_params iwl_mvm_default_tt_params = {
 475         .ct_kill_entry = 118,
 476         .ct_kill_exit = 96,
 477         .ct_kill_duration = 5,
 478         .dynamic_smps_entry = 114,
 479         .dynamic_smps_exit = 110,
 480         .tx_protection_entry = 114,
 481         .tx_protection_exit = 108,
 482         .tx_backoff = {
 483                 {.temperature = 112, .backoff = 200},
 484                 {.temperature = 113, .backoff = 600},
 485                 {.temperature = 114, .backoff = 1200},
 486                 {.temperature = 115, .backoff = 2000},
 487                 {.temperature = 116, .backoff = 4000},
 488                 {.temperature = 117, .backoff = 10000},
 489         },
 490         .support_ct_kill = true,
 491         .support_dynamic_smps = true,
 492         .support_tx_protection = true,
 493         .support_tx_backoff = true,
 494 };
 495
 496 /* budget in mWatt */
 497 static const u32 iwl_mvm_cdev_budgets[] = {
 498         2000,   /* cooling state 0 */
 499         1800,   /* cooling state 1 */
 500         1600,   /* cooling state 2 */
 501         1400,   /* cooling state 3 */
 502         1200,   /* cooling state 4 */
 503         1000,   /* cooling state 5 */
 504         900,    /* cooling state 6 */
 505         800,    /* cooling state 7 */
 506         700,    /* cooling state 8 */
 507         650,    /* cooling state 9 */
 508         600,    /* cooling state 10 */
 509         550,    /* cooling state 11 */
 510         500,    /* cooling state 12 */
 511         450,    /* cooling state 13 */
 512         400,    /* cooling state 14 */
 513         350,    /* cooling state 15 */
 514         300,    /* cooling state 16 */
 515         250,    /* cooling state 17 */
 516         200,    /* cooling state 18 */
 517         150,    /* cooling state 19 */
 518 };
 519
 520 int iwl_mvm_ctdp_command(struct iwl_mvm *mvm, u32 op, u32 state)
 521 {
 522         struct iwl_mvm_ctdp_cmd cmd = {
 523                 .operation = cpu_to_le32(op),
 524                 .budget = cpu_to_le32(iwl_mvm_cdev_budgets[state]),
 525                 .window_size = 0,
 526         };
 527         int ret;
 528         u32 status;
 529
 530         lockdep_assert_held(&mvm->mutex);
 531
 532         ret = iwl_mvm_send_cmd_pdu_status(mvm, WIDE_ID(PHY_OPS_GROUP,
 533                                                        CTDP_CONFIG_CMD),
 534                                           sizeof(cmd), &cmd, &status);
 535
 536         if (ret) {
 537                 IWL_ERR(mvm, "cTDP command failed (err=%d)\n", ret);
 538                 return ret;
 539         }
 540
 541         switch (op) {
 542         case CTDP_CMD_OPERATION_START:
 543 #ifdef CONFIG_THERMAL
 544                 mvm->cooling_dev.cur_state = state;
 545 #endif /* CONFIG_THERMAL */
 546                 break;
 547         case CTDP_CMD_OPERATION_REPORT:
 548                 IWL_DEBUG_TEMP(mvm, "cTDP avg energy in mWatt = %d\n", status);
 549                 /* when the function is called with CTDP_CMD_OPERATION_REPORT
 550                  * option the function should return the average budget value
 551                  * that is received from the FW.
 552                  * The budget can't be less or equal to 0, so it's possible
 553                  * to distinguish between error values and budgets.
 554                  */
 555                 return status;
 556         case CTDP_CMD_OPERATION_STOP:
 557                 IWL_DEBUG_TEMP(mvm, "cTDP stopped successfully\n");
 558                 break;
 559         }
 560
 561         return 0;
 562 }
 563
 564 #ifdef CONFIG_THERMAL
 565 static int compare_temps(const void *a, const void *b)
 566 {
 567         return ((s16)le16_to_cpu(*(__le16 *)a) -
 568                 (s16)le16_to_cpu(*(__le16 *)b));
 569 }
 570
 571 int iwl_mvm_send_temp_report_ths_cmd(struct iwl_mvm *mvm)
 572 {
 573         struct temp_report_ths_cmd cmd = {0};
 574         int ret, i, j, idx = 0;
 575
 576         lockdep_assert_held(&mvm->mutex);
 577
 578         if (!mvm->tz_device.tzone)
 579                 return -EINVAL;
 580
 581         /* The driver holds array of temperature trips that are unsorted
 582          * and uncompressed, the FW should get it compressed and sorted
 583          */
 584
 585         /* compress temp_trips to cmd array, remove uninitialized values*/
 586         for (i = 0; i < IWL_MAX_DTS_TRIPS; i++) {
 587                 if (mvm->tz_device.temp_trips[i] != S16_MIN) {
 588                         cmd.thresholds[idx++] =
 589                                 cpu_to_le16(mvm->tz_device.temp_trips[i]);
 590                 }
 591         }
 592         cmd.num_temps = cpu_to_le32(idx);
 593
 594         if (!idx)
 595                 goto send;
 596
 597         /*sort cmd array*/
 598         sort(cmd.thresholds, idx, sizeof(s16), compare_temps, NULL);
 599
 600         /* we should save the indexes of trips because we sort
 601          * and compress the orginal array
 602          */
 603         for (i = 0; i < idx; i++) {
 604                 for (j = 0; j < IWL_MAX_DTS_TRIPS; j++) {
 605                         if (le16_to_cpu(cmd.thresholds[i]) ==
 606                                 mvm->tz_device.temp_trips[j])
 607                                 mvm->tz_device.fw_trips_index[i] = j;
 608                 }
 609         }
 610
 611 send:
 612         ret = iwl_mvm_send_cmd_pdu(mvm, WIDE_ID(PHY_OPS_GROUP,
 613                                                 TEMP_REPORTING_THRESHOLDS_CMD),
 614                                    0, sizeof(cmd), &cmd);
 615         if (ret)
 616                 IWL_ERR(mvm, "TEMP_REPORT_THS_CMD command failed (err=%d)\n",
 617                         ret);
 618
 619         return ret;
 620 }
 621
 622 static int iwl_mvm_tzone_get_temp(struct thermal_zone_device *device,
 623                                   int *temperature)
 624 {
 625         struct iwl_mvm *mvm = (struct iwl_mvm *)device->devdata;
 626         int ret;
 627         int temp;
 628
 629         mutex_lock(&mvm->mutex);
 630
 631         if (!mvm->ucode_loaded || !(mvm->cur_ucode == IWL_UCODE_REGULAR)) {
 632                 ret = -EIO;
 633                 goto out;
 634         }
 635
 636         ret = iwl_mvm_get_temp(mvm, &temp);
 637         if (ret)
 638                 goto out;
 639
 640         *temperature = temp * 1000;
 641
 642 out:
 643         mutex_unlock(&mvm->mutex);
 644         return ret;
 645 }
 646
 647 static int iwl_mvm_tzone_get_trip_temp(struct thermal_zone_device *device,
 648                                        int trip, int *temp)
 649 {
 650         struct iwl_mvm *mvm = (struct iwl_mvm *)device->devdata;
 651
 652         if (trip < 0 || trip >= IWL_MAX_DTS_TRIPS)
 653                 return -EINVAL;
 654
 655         *temp = mvm->tz_device.temp_trips[trip] * 1000;
 656
 657         return 0;
 658 }
 659
 660 static int iwl_mvm_tzone_get_trip_type(struct thermal_zone_device *device,
 661                                        int trip, enum thermal_trip_type *type)
 662 {
 663         if (trip < 0 || trip >= IWL_MAX_DTS_TRIPS)
 664                 return -EINVAL;
 665
 666         *type = THERMAL_TRIP_PASSIVE;
 667
 668         return 0;
 669 }
 670
 671 static int iwl_mvm_tzone_set_trip_temp(struct thermal_zone_device *device,
 672                                        int trip, int temp)
 673 {
 674         struct iwl_mvm *mvm = (struct iwl_mvm *)device->devdata;
 675         struct iwl_mvm_thermal_device *tzone;
 676         int i, ret;
 677         s16 temperature;
 678
 679         mutex_lock(&mvm->mutex);
 680
 681         if (!mvm->ucode_loaded || !(mvm->cur_ucode == IWL_UCODE_REGULAR)) {
 682                 ret = -EIO;
 683                 goto out;
 684         }
 685
 686         if (trip < 0 || trip >= IWL_MAX_DTS_TRIPS) {
 687                 ret = -EINVAL;
 688                 goto out;
 689         }
 690
 691         if ((temp / 1000) > S16_MAX) {
 692                 ret = -EINVAL;
 693                 goto out;
 694         }
 695
 696         temperature = (s16)(temp / 1000);
 697         tzone = &mvm->tz_device;
 698
 699         if (!tzone) {
 700                 ret = -EIO;
 701                 goto out;
 702         }
 703
 704         /* no updates*/
 705         if (tzone->temp_trips[trip] == temperature) {
 706                 ret = 0;
 707                 goto out;
 708         }
 709
 710         /* already existing temperature */
 711         for (i = 0; i < IWL_MAX_DTS_TRIPS; i++) {
 712                 if (tzone->temp_trips[i] == temperature) {
 713                         ret = -EINVAL;
 714                         goto out;
 715                 }
 716         }
 717
 718         tzone->temp_trips[trip] = temperature;
 719
 720         ret = iwl_mvm_send_temp_report_ths_cmd(mvm);
 721 out:
 722         mutex_unlock(&mvm->mutex);
 723         return ret;
 724 }
 725
 726 static  struct thermal_zone_device_ops tzone_ops = {
 727         .get_temp = iwl_mvm_tzone_get_temp,
 728         .get_trip_temp = iwl_mvm_tzone_get_trip_temp,
 729         .get_trip_type = iwl_mvm_tzone_get_trip_type,
 730         .set_trip_temp = iwl_mvm_tzone_set_trip_temp,
 731 };
 732
 733 /* make all trips writable */
 734 #define IWL_WRITABLE_TRIPS_MSK (BIT(IWL_MAX_DTS_TRIPS) - 1)
 735
 736 static void iwl_mvm_thermal_zone_register(struct iwl_mvm *mvm)
 737 {
 738         int i;
 739         char name[] = "iwlwifi";
 740
 741         if (!iwl_mvm_is_tt_in_fw(mvm)) {
 742                 mvm->tz_device.tzone = NULL;
 743
 744                 return;
 745         }
 746
 747         BUILD_BUG_ON(ARRAY_SIZE(name) >= THERMAL_NAME_LENGTH);
 748
 749         mvm->tz_device.tzone = thermal_zone_device_register(name,
 750                                                         IWL_MAX_DTS_TRIPS,
 751                                                         IWL_WRITABLE_TRIPS_MSK,
 752                                                         mvm, &tzone_ops,
 753                                                         NULL, 0, 0);
 754         if (IS_ERR(mvm->tz_device.tzone)) {
 755                 IWL_DEBUG_TEMP(mvm,
 756                                "Failed to register to thermal zone (err = %ld)\n",
 757                                PTR_ERR(mvm->tz_device.tzone));
 758                 mvm->tz_device.tzone = NULL;
 759                 return;
 760         }
 761
 762         /* 0 is a valid temperature,
 763          * so initialize the array with S16_MIN which invalid temperature
 764          */
 765         for (i = 0 ; i < IWL_MAX_DTS_TRIPS; i++)
 766                 mvm->tz_device.temp_trips[i] = S16_MIN;
 767 }
 768
 769 static int iwl_mvm_tcool_get_max_state(struct thermal_cooling_device *cdev,
 770                                        unsigned long *state)
 771 {
 772         *state = ARRAY_SIZE(iwl_mvm_cdev_budgets) - 1;
 773
 774         return 0;
 775 }
 776
 777 static int iwl_mvm_tcool_get_cur_state(struct thermal_cooling_device *cdev,
 778                                        unsigned long *state)
 779 {
 780         struct iwl_mvm *mvm = (struct iwl_mvm *)(cdev->devdata);
 781
 782         *state = mvm->cooling_dev.cur_state;
 783
 784         return 0;
 785 }
 786
 787 static int iwl_mvm_tcool_set_cur_state(struct thermal_cooling_device *cdev,
 788                                        unsigned long new_state)
 789 {
 790         struct iwl_mvm *mvm = (struct iwl_mvm *)(cdev->devdata);
 791         int ret;
 792
 793         if (!mvm->ucode_loaded || !(mvm->cur_ucode == IWL_UCODE_REGULAR))
 794                 return -EIO;
 795
 796         mutex_lock(&mvm->mutex);
 797
 798         if (new_state >= ARRAY_SIZE(iwl_mvm_cdev_budgets)) {
 799                 ret = -EINVAL;
 800                 goto unlock;
 801         }
 802
 803         ret = iwl_mvm_ctdp_command(mvm, CTDP_CMD_OPERATION_START,
 804                                    new_state);
 805
 806 unlock:
 807         mutex_unlock(&mvm->mutex);
 808         return ret;
 809 }
 810
 811 static struct thermal_cooling_device_ops tcooling_ops = {
 812         .get_max_state = iwl_mvm_tcool_get_max_state,
 813         .get_cur_state = iwl_mvm_tcool_get_cur_state,
 814         .set_cur_state = iwl_mvm_tcool_set_cur_state,
 815 };
 816
 817 static void iwl_mvm_cooling_device_register(struct iwl_mvm *mvm)
 818 {
 819         char name[] = "iwlwifi";
 820
 821         if (!iwl_mvm_is_ctdp_supported(mvm))
 822                 return;
 823
 824         BUILD_BUG_ON(ARRAY_SIZE(name) >= THERMAL_NAME_LENGTH);
 825
 826         mvm->cooling_dev.cdev =
 827                 thermal_cooling_device_register(name,
 828                                                 mvm,
 829                                                 &tcooling_ops);
 830
 831         if (IS_ERR(mvm->cooling_dev.cdev)) {
 832                 IWL_DEBUG_TEMP(mvm,
 833                                "Failed to register to cooling device (err = %ld)\n",
 834                                PTR_ERR(mvm->cooling_dev.cdev));
 835                 mvm->cooling_dev.cdev = NULL;
 836                 return;
 837         }
 838 }
 839
 840 static void iwl_mvm_thermal_zone_unregister(struct iwl_mvm *mvm)
 841 {
 842         if (!iwl_mvm_is_tt_in_fw(mvm) || !mvm->tz_device.tzone)
 843                 return;
 844
 845         IWL_DEBUG_TEMP(mvm, "Thermal zone device unregister\n");
 846         thermal_zone_device_unregister(mvm->tz_device.tzone);
 847         mvm->tz_device.tzone = NULL;
 848 }
 849
 850 static void iwl_mvm_cooling_device_unregister(struct iwl_mvm *mvm)
 851 {
 852         if (!iwl_mvm_is_ctdp_supported(mvm) || !mvm->cooling_dev.cdev)
 853                 return;
 854
 855         IWL_DEBUG_TEMP(mvm, "Cooling device unregister\n");
 856         thermal_cooling_device_unregister(mvm->cooling_dev.cdev);
 857         mvm->cooling_dev.cdev = NULL;
 858 }
 859 #endif /* CONFIG_THERMAL */
 860
 861 void iwl_mvm_thermal_initialize(struct iwl_mvm *mvm, u32 min_backoff)
 862 {
 863         struct iwl_mvm_tt_mgmt *tt = &mvm->thermal_throttle;
 864
 865         IWL_DEBUG_TEMP(mvm, "Initialize Thermal Throttling\n");
 866
 867         if (mvm->cfg->thermal_params)
 868                 tt->params = *mvm->cfg->thermal_params;
 869         else
 870                 tt->params = iwl_mvm_default_tt_params;
 871
 872         tt->throttle = false;
 873         tt->dynamic_smps = false;
 874         tt->min_backoff = min_backoff;
 875         INIT_DELAYED_WORK(&tt->ct_kill_exit, check_exit_ctkill);
 876
 877 #ifdef CONFIG_THERMAL
 878         iwl_mvm_cooling_device_register(mvm);
 879         iwl_mvm_thermal_zone_register(mvm);
 880 #endif
 881 }
 882
 883 void iwl_mvm_thermal_exit(struct iwl_mvm *mvm)
 884 {
 885         cancel_delayed_work_sync(&mvm->thermal_throttle.ct_kill_exit);
 886         IWL_DEBUG_TEMP(mvm, "Exit Thermal Throttling\n");
 887
 888 #ifdef CONFIG_THERMAL
 889         iwl_mvm_cooling_device_unregister(mvm);
 890         iwl_mvm_thermal_zone_unregister(mvm);
 891 #endif
 892 }