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 /* budget in mWatt */ 514 static const u32 iwl_mvm_cdev_budgets[] = { 515 2000, /* cooling state 0 */ 516 1800, /* cooling state 1 */ 517 1600, /* cooling state 2 */ 518 1400, /* cooling state 3 */ 519 1200, /* cooling state 4 */ 520 1000, /* cooling state 5 */ 521 900, /* cooling state 6 */ 522 800, /* cooling state 7 */ 523 700, /* cooling state 8 */ 524 650, /* cooling state 9 */ 525 600, /* cooling state 10 */ 526 550, /* cooling state 11 */ 527 500, /* cooling state 12 */ 528 450, /* cooling state 13 */ 529 400, /* cooling state 14 */ 530 350, /* cooling state 15 */ 531 300, /* cooling state 16 */ 532 250, /* cooling state 17 */ 533 200, /* cooling state 18 */ 534 150, /* cooling state 19 */ 535 }; 536 537 int iwl_mvm_ctdp_command(struct iwl_mvm *mvm, u32 op, u32 state) 538 { 539 struct iwl_mvm_ctdp_cmd cmd = { 540 .operation = cpu_to_le32(op), 541 .budget = cpu_to_le32(iwl_mvm_cdev_budgets[state]), 542 .window_size = 0, 543 }; 544 int ret; 545 u32 status; 546 547 lockdep_assert_held(&mvm->mutex); 548 549 ret = iwl_mvm_send_cmd_pdu_status(mvm, WIDE_ID(PHY_OPS_GROUP, 550 CTDP_CONFIG_CMD), 551 sizeof(cmd), &cmd, &status); 552 553 if (ret) { 554 IWL_ERR(mvm, "cTDP command failed (err=%d)\n", ret); 555 return ret; 556 } 557 558 switch (op) { 559 case CTDP_CMD_OPERATION_START: 560 #ifdef CONFIG_THERMAL 561 mvm->cooling_dev.cur_state = state; 562 #endif /* CONFIG_THERMAL */ 563 break; 564 case CTDP_CMD_OPERATION_REPORT: 565 IWL_DEBUG_TEMP(mvm, "cTDP avg energy in mWatt = %d\n", status); 566 /* when the function is called with CTDP_CMD_OPERATION_REPORT 567 * option the function should return the average budget value 568 * that is received from the FW. 569 * The budget can't be less or equal to 0, so it's possible 570 * to distinguish between error values and budgets. 571 */ 572 return status; 573 case CTDP_CMD_OPERATION_STOP: 574 IWL_DEBUG_TEMP(mvm, "cTDP stopped successfully\n"); 575 break; 576 } 577 578 return 0; 579 } 580 581 #ifdef CONFIG_THERMAL 582 static int compare_temps(const void *a, const void *b) 583 { 584 return ((s16)le16_to_cpu(*(__le16 *)a) - 585 (s16)le16_to_cpu(*(__le16 *)b)); 586 } 587 588 int iwl_mvm_send_temp_report_ths_cmd(struct iwl_mvm *mvm) 589 { 590 struct temp_report_ths_cmd cmd = {0}; 591 int ret, i, j, idx = 0; 592 593 lockdep_assert_held(&mvm->mutex); 594 595 if (!mvm->tz_device.tzone) 596 return -EINVAL; 597 598 /* The driver holds array of temperature trips that are unsorted 599 * and uncompressed, the FW should get it compressed and sorted 600 */ 601 602 /* compress temp_trips to cmd array, remove uninitialized values*/ 603 for (i = 0; i < IWL_MAX_DTS_TRIPS; i++) { 604 if (mvm->tz_device.temp_trips[i] != S16_MIN) { 605 cmd.thresholds[idx++] = 606 cpu_to_le16(mvm->tz_device.temp_trips[i]); 607 } 608 } 609 cmd.num_temps = cpu_to_le32(idx); 610 611 if (!idx) 612 goto send; 613 614 /*sort cmd array*/ 615 sort(cmd.thresholds, idx, sizeof(s16), compare_temps, NULL); 616 617 /* we should save the indexes of trips because we sort 618 * and compress the orginal array 619 */ 620 for (i = 0; i < idx; i++) { 621 for (j = 0; j < IWL_MAX_DTS_TRIPS; j++) { 622 if (le16_to_cpu(cmd.thresholds[i]) == 623 mvm->tz_device.temp_trips[j]) 624 mvm->tz_device.fw_trips_index[i] = j; 625 } 626 } 627 628 send: 629 ret = iwl_mvm_send_cmd_pdu(mvm, WIDE_ID(PHY_OPS_GROUP, 630 TEMP_REPORTING_THRESHOLDS_CMD), 631 0, sizeof(cmd), &cmd); 632 if (ret) 633 IWL_ERR(mvm, "TEMP_REPORT_THS_CMD command failed (err=%d)\n", 634 ret); 635 636 return ret; 637 } 638 639 static int iwl_mvm_tzone_get_temp(struct thermal_zone_device *device, 640 int *temperature) 641 { 642 struct iwl_mvm *mvm = (struct iwl_mvm *)device->devdata; 643 int ret; 644 int temp; 645 646 mutex_lock(&mvm->mutex); 647 648 if (!mvm->ucode_loaded || !(mvm->cur_ucode == IWL_UCODE_REGULAR)) { 649 ret = -EIO; 650 goto out; 651 } 652 653 ret = iwl_mvm_get_temp(mvm, &temp); 654 if (ret) 655 goto out; 656 657 *temperature = temp * 1000; 658 659 out: 660 mutex_unlock(&mvm->mutex); 661 return ret; 662 } 663 664 static int iwl_mvm_tzone_get_trip_temp(struct thermal_zone_device *device, 665 int trip, int *temp) 666 { 667 struct iwl_mvm *mvm = (struct iwl_mvm *)device->devdata; 668 669 if (trip < 0 || trip >= IWL_MAX_DTS_TRIPS) 670 return -EINVAL; 671 672 *temp = mvm->tz_device.temp_trips[trip] * 1000; 673 674 return 0; 675 } 676 677 static int iwl_mvm_tzone_get_trip_type(struct thermal_zone_device *device, 678 int trip, enum thermal_trip_type *type) 679 { 680 if (trip < 0 || trip >= IWL_MAX_DTS_TRIPS) 681 return -EINVAL; 682 683 *type = THERMAL_TRIP_PASSIVE; 684 685 return 0; 686 } 687 688 static int iwl_mvm_tzone_set_trip_temp(struct thermal_zone_device *device, 689 int trip, int temp) 690 { 691 struct iwl_mvm *mvm = (struct iwl_mvm *)device->devdata; 692 struct iwl_mvm_thermal_device *tzone; 693 int i, ret; 694 s16 temperature; 695 696 mutex_lock(&mvm->mutex); 697 698 if (!mvm->ucode_loaded || !(mvm->cur_ucode == IWL_UCODE_REGULAR)) { 699 ret = -EIO; 700 goto out; 701 } 702 703 if (trip < 0 || trip >= IWL_MAX_DTS_TRIPS) { 704 ret = -EINVAL; 705 goto out; 706 } 707 708 if ((temp / 1000) > S16_MAX) { 709 ret = -EINVAL; 710 goto out; 711 } 712 713 temperature = (s16)(temp / 1000); 714 tzone = &mvm->tz_device; 715 716 if (!tzone) { 717 ret = -EIO; 718 goto out; 719 } 720 721 /* no updates*/ 722 if (tzone->temp_trips[trip] == temperature) { 723 ret = 0; 724 goto out; 725 } 726 727 /* already existing temperature */ 728 for (i = 0; i < IWL_MAX_DTS_TRIPS; i++) { 729 if (tzone->temp_trips[i] == temperature) { 730 ret = -EINVAL; 731 goto out; 732 } 733 } 734 735 tzone->temp_trips[trip] = temperature; 736 737 ret = iwl_mvm_send_temp_report_ths_cmd(mvm); 738 out: 739 mutex_unlock(&mvm->mutex); 740 return ret; 741 } 742 743 static struct thermal_zone_device_ops tzone_ops = { 744 .get_temp = iwl_mvm_tzone_get_temp, 745 .get_trip_temp = iwl_mvm_tzone_get_trip_temp, 746 .get_trip_type = iwl_mvm_tzone_get_trip_type, 747 .set_trip_temp = iwl_mvm_tzone_set_trip_temp, 748 }; 749 750 /* make all trips writable */ 751 #define IWL_WRITABLE_TRIPS_MSK (BIT(IWL_MAX_DTS_TRIPS) - 1) 752 753 static void iwl_mvm_thermal_zone_register(struct iwl_mvm *mvm) 754 { 755 int i; 756 char name[] = "iwlwifi"; 757 758 if (!iwl_mvm_is_tt_in_fw(mvm)) { 759 mvm->tz_device.tzone = NULL; 760 761 return; 762 } 763 764 BUILD_BUG_ON(ARRAY_SIZE(name) >= THERMAL_NAME_LENGTH); 765 766 mvm->tz_device.tzone = thermal_zone_device_register(name, 767 IWL_MAX_DTS_TRIPS, 768 IWL_WRITABLE_TRIPS_MSK, 769 mvm, &tzone_ops, 770 NULL, 0, 0); 771 if (IS_ERR(mvm->tz_device.tzone)) { 772 IWL_DEBUG_TEMP(mvm, 773 "Failed to register to thermal zone (err = %ld)\n", 774 PTR_ERR(mvm->tz_device.tzone)); 775 mvm->tz_device.tzone = NULL; 776 return; 777 } 778 779 /* 0 is a valid temperature, 780 * so initialize the array with S16_MIN which invalid temperature 781 */ 782 for (i = 0 ; i < IWL_MAX_DTS_TRIPS; i++) 783 mvm->tz_device.temp_trips[i] = S16_MIN; 784 } 785 786 static int iwl_mvm_tcool_get_max_state(struct thermal_cooling_device *cdev, 787 unsigned long *state) 788 { 789 *state = ARRAY_SIZE(iwl_mvm_cdev_budgets) - 1; 790 791 return 0; 792 } 793 794 static int iwl_mvm_tcool_get_cur_state(struct thermal_cooling_device *cdev, 795 unsigned long *state) 796 { 797 struct iwl_mvm *mvm = (struct iwl_mvm *)(cdev->devdata); 798 799 if (test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)) 800 return -EBUSY; 801 802 *state = mvm->cooling_dev.cur_state; 803 804 return 0; 805 } 806 807 static int iwl_mvm_tcool_set_cur_state(struct thermal_cooling_device *cdev, 808 unsigned long new_state) 809 { 810 struct iwl_mvm *mvm = (struct iwl_mvm *)(cdev->devdata); 811 int ret; 812 813 if (!mvm->ucode_loaded || !(mvm->cur_ucode == IWL_UCODE_REGULAR)) 814 return -EIO; 815 816 if (test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)) 817 return -EBUSY; 818 819 mutex_lock(&mvm->mutex); 820 821 if (new_state >= ARRAY_SIZE(iwl_mvm_cdev_budgets)) { 822 ret = -EINVAL; 823 goto unlock; 824 } 825 826 ret = iwl_mvm_ctdp_command(mvm, CTDP_CMD_OPERATION_START, 827 new_state); 828 829 unlock: 830 mutex_unlock(&mvm->mutex); 831 return ret; 832 } 833 834 static struct thermal_cooling_device_ops tcooling_ops = { 835 .get_max_state = iwl_mvm_tcool_get_max_state, 836 .get_cur_state = iwl_mvm_tcool_get_cur_state, 837 .set_cur_state = iwl_mvm_tcool_set_cur_state, 838 }; 839 840 static void iwl_mvm_cooling_device_register(struct iwl_mvm *mvm) 841 { 842 char name[] = "iwlwifi"; 843 844 if (!iwl_mvm_is_ctdp_supported(mvm)) 845 return; 846 847 BUILD_BUG_ON(ARRAY_SIZE(name) >= THERMAL_NAME_LENGTH); 848 849 mvm->cooling_dev.cdev = 850 thermal_cooling_device_register(name, 851 mvm, 852 &tcooling_ops); 853 854 if (IS_ERR(mvm->cooling_dev.cdev)) { 855 IWL_DEBUG_TEMP(mvm, 856 "Failed to register to cooling device (err = %ld)\n", 857 PTR_ERR(mvm->cooling_dev.cdev)); 858 mvm->cooling_dev.cdev = NULL; 859 return; 860 } 861 } 862 863 static void iwl_mvm_thermal_zone_unregister(struct iwl_mvm *mvm) 864 { 865 if (!iwl_mvm_is_tt_in_fw(mvm) || !mvm->tz_device.tzone) 866 return; 867 868 IWL_DEBUG_TEMP(mvm, "Thermal zone device unregister\n"); 869 thermal_zone_device_unregister(mvm->tz_device.tzone); 870 mvm->tz_device.tzone = NULL; 871 } 872 873 static void iwl_mvm_cooling_device_unregister(struct iwl_mvm *mvm) 874 { 875 if (!iwl_mvm_is_ctdp_supported(mvm) || !mvm->cooling_dev.cdev) 876 return; 877 878 IWL_DEBUG_TEMP(mvm, "Cooling device unregister\n"); 879 thermal_cooling_device_unregister(mvm->cooling_dev.cdev); 880 mvm->cooling_dev.cdev = NULL; 881 } 882 #endif /* CONFIG_THERMAL */ 883 884 void iwl_mvm_thermal_initialize(struct iwl_mvm *mvm, u32 min_backoff) 885 { 886 struct iwl_mvm_tt_mgmt *tt = &mvm->thermal_throttle; 887 888 IWL_DEBUG_TEMP(mvm, "Initialize Thermal Throttling\n"); 889 890 if (mvm->cfg->thermal_params) 891 tt->params = *mvm->cfg->thermal_params; 892 else 893 tt->params = iwl_mvm_default_tt_params; 894 895 tt->throttle = false; 896 tt->dynamic_smps = false; 897 tt->min_backoff = min_backoff; 898 INIT_DELAYED_WORK(&tt->ct_kill_exit, check_exit_ctkill); 899 900 #ifdef CONFIG_THERMAL 901 iwl_mvm_cooling_device_register(mvm); 902 iwl_mvm_thermal_zone_register(mvm); 903 #endif 904 } 905 906 void iwl_mvm_thermal_exit(struct iwl_mvm *mvm) 907 { 908 cancel_delayed_work_sync(&mvm->thermal_throttle.ct_kill_exit); 909 IWL_DEBUG_TEMP(mvm, "Exit Thermal Throttling\n"); 910 911 #ifdef CONFIG_THERMAL 912 iwl_mvm_cooling_device_unregister(mvm); 913 iwl_mvm_thermal_zone_unregister(mvm); 914 #endif 915 } 916