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1// SPDX-License-Identifier: MIT2/*3 * Copyright 2012 Advanced Micro Devices, Inc.4 *5 * Permission is hereby granted, free of charge, to any person obtaining a6 * copy of this software and associated documentation files (the "Software"),7 * to deal in the Software without restriction, including without limitation8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,9 * and/or sell copies of the Software, and to permit persons to whom the10 * Software is furnished to do so, subject to the following conditions:11 *12 * The above copyright notice and this permission notice shall be included in13 * all copies or substantial portions of the Software.14 *15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL18 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR19 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,20 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR21 * OTHER DEALINGS IN THE SOFTWARE.22 *23 */24 25#include <linux/pci.h>26#include <linux/acpi.h>27#include <linux/backlight.h>28#include <linux/slab.h>29#include <linux/xarray.h>30#include <linux/power_supply.h>31#include <linux/pm_runtime.h>32#include <linux/suspend.h>33#include <acpi/video.h>34#include <acpi/actbl.h>35 36#include "amdgpu.h"37#include "amdgpu_pm.h"38#include "amdgpu_display.h"39#include "amd_acpi.h"40#include "atom.h"41 42/* Declare GUID for AMD _DSM method for XCCs */43static const guid_t amd_xcc_dsm_guid = GUID_INIT(0x8267f5d5, 0xa556, 0x44f2,44 0xb8, 0xb4, 0x45, 0x56, 0x2e,45 0x8c, 0x5b, 0xec);46 47#define AMD_XCC_HID_START 300048#define AMD_XCC_DSM_GET_NUM_FUNCS 049#define AMD_XCC_DSM_GET_SUPP_MODE 150#define AMD_XCC_DSM_GET_XCP_MODE 251#define AMD_XCC_DSM_GET_VF_XCC_MAPPING 452#define AMD_XCC_DSM_GET_TMR_INFO 553#define AMD_XCC_DSM_NUM_FUNCS 554 55#define AMD_XCC_MAX_HID 2456 57struct xarray numa_info_xa;58 59/* Encapsulates the XCD acpi object information */60struct amdgpu_acpi_xcc_info {61 struct list_head list;62 struct amdgpu_numa_info *numa_info;63 uint8_t xcp_node;64 uint8_t phy_id;65 acpi_handle handle;66};67 68struct amdgpu_acpi_dev_info {69 struct list_head list;70 struct list_head xcc_list;71 uint32_t sbdf;72 uint16_t supp_xcp_mode;73 uint16_t xcp_mode;74 uint16_t mem_mode;75 uint64_t tmr_base;76 uint64_t tmr_size;77};78 79struct list_head amdgpu_acpi_dev_list;80 81struct amdgpu_atif_notification_cfg {82 bool enabled;83 int command_code;84};85 86struct amdgpu_atif_notifications {87 bool thermal_state;88 bool forced_power_state;89 bool system_power_state;90 bool brightness_change;91 bool dgpu_display_event;92 bool gpu_package_power_limit;93};94 95struct amdgpu_atif_functions {96 bool system_params;97 bool sbios_requests;98 bool temperature_change;99 bool query_backlight_transfer_characteristics;100 bool ready_to_undock;101 bool external_gpu_information;102};103 104struct amdgpu_atif {105 acpi_handle handle;106 107 struct amdgpu_atif_notifications notifications;108 struct amdgpu_atif_functions functions;109 struct amdgpu_atif_notification_cfg notification_cfg;110 struct backlight_device *bd;111 struct amdgpu_dm_backlight_caps backlight_caps;112};113 114struct amdgpu_atcs_functions {115 bool get_ext_state;116 bool pcie_perf_req;117 bool pcie_dev_rdy;118 bool pcie_bus_width;119 bool power_shift_control;120};121 122struct amdgpu_atcs {123 acpi_handle handle;124 125 struct amdgpu_atcs_functions functions;126};127 128static struct amdgpu_acpi_priv {129 struct amdgpu_atif atif;130 struct amdgpu_atcs atcs;131} amdgpu_acpi_priv;132 133/* Call the ATIF method134 */135/**136 * amdgpu_atif_call - call an ATIF method137 *138 * @atif: atif structure139 * @function: the ATIF function to execute140 * @params: ATIF function params141 *142 * Executes the requested ATIF function (all asics).143 * Returns a pointer to the acpi output buffer.144 */145static union acpi_object *amdgpu_atif_call(struct amdgpu_atif *atif,146 int function,147 struct acpi_buffer *params)148{149 acpi_status status;150 union acpi_object *obj;151 union acpi_object atif_arg_elements[2];152 struct acpi_object_list atif_arg;153 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };154 155 atif_arg.count = 2;156 atif_arg.pointer = &atif_arg_elements[0];157 158 atif_arg_elements[0].type = ACPI_TYPE_INTEGER;159 atif_arg_elements[0].integer.value = function;160 161 if (params) {162 atif_arg_elements[1].type = ACPI_TYPE_BUFFER;163 atif_arg_elements[1].buffer.length = params->length;164 atif_arg_elements[1].buffer.pointer = params->pointer;165 } else {166 /* We need a second fake parameter */167 atif_arg_elements[1].type = ACPI_TYPE_INTEGER;168 atif_arg_elements[1].integer.value = 0;169 }170 171 status = acpi_evaluate_object(atif->handle, NULL, &atif_arg,172 &buffer);173 obj = (union acpi_object *)buffer.pointer;174 175 /* Fail if calling the method fails */176 if (ACPI_FAILURE(status)) {177 DRM_DEBUG_DRIVER("failed to evaluate ATIF got %s\n",178 acpi_format_exception(status));179 kfree(obj);180 return NULL;181 }182 183 if (obj->type != ACPI_TYPE_BUFFER) {184 DRM_DEBUG_DRIVER("bad object returned from ATIF: %d\n",185 obj->type);186 kfree(obj);187 return NULL;188 }189 190 return obj;191}192 193/**194 * amdgpu_atif_parse_notification - parse supported notifications195 *196 * @n: supported notifications struct197 * @mask: supported notifications mask from ATIF198 *199 * Use the supported notifications mask from ATIF function200 * ATIF_FUNCTION_VERIFY_INTERFACE to determine what notifications201 * are supported (all asics).202 */203static void amdgpu_atif_parse_notification(struct amdgpu_atif_notifications *n, u32 mask)204{205 n->thermal_state = mask & ATIF_THERMAL_STATE_CHANGE_REQUEST_SUPPORTED;206 n->forced_power_state = mask & ATIF_FORCED_POWER_STATE_CHANGE_REQUEST_SUPPORTED;207 n->system_power_state = mask & ATIF_SYSTEM_POWER_SOURCE_CHANGE_REQUEST_SUPPORTED;208 n->brightness_change = mask & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST_SUPPORTED;209 n->dgpu_display_event = mask & ATIF_DGPU_DISPLAY_EVENT_SUPPORTED;210 n->gpu_package_power_limit = mask & ATIF_GPU_PACKAGE_POWER_LIMIT_REQUEST_SUPPORTED;211}212 213/**214 * amdgpu_atif_parse_functions - parse supported functions215 *216 * @f: supported functions struct217 * @mask: supported functions mask from ATIF218 *219 * Use the supported functions mask from ATIF function220 * ATIF_FUNCTION_VERIFY_INTERFACE to determine what functions221 * are supported (all asics).222 */223static void amdgpu_atif_parse_functions(struct amdgpu_atif_functions *f, u32 mask)224{225 f->system_params = mask & ATIF_GET_SYSTEM_PARAMETERS_SUPPORTED;226 f->sbios_requests = mask & ATIF_GET_SYSTEM_BIOS_REQUESTS_SUPPORTED;227 f->temperature_change = mask & ATIF_TEMPERATURE_CHANGE_NOTIFICATION_SUPPORTED;228 f->query_backlight_transfer_characteristics =229 mask & ATIF_QUERY_BACKLIGHT_TRANSFER_CHARACTERISTICS_SUPPORTED;230 f->ready_to_undock = mask & ATIF_READY_TO_UNDOCK_NOTIFICATION_SUPPORTED;231 f->external_gpu_information = mask & ATIF_GET_EXTERNAL_GPU_INFORMATION_SUPPORTED;232}233 234/**235 * amdgpu_atif_verify_interface - verify ATIF236 *237 * @atif: amdgpu atif struct238 *239 * Execute the ATIF_FUNCTION_VERIFY_INTERFACE ATIF function240 * to initialize ATIF and determine what features are supported241 * (all asics).242 * returns 0 on success, error on failure.243 */244static int amdgpu_atif_verify_interface(struct amdgpu_atif *atif)245{246 union acpi_object *info;247 struct atif_verify_interface output;248 size_t size;249 int err = 0;250 251 info = amdgpu_atif_call(atif, ATIF_FUNCTION_VERIFY_INTERFACE, NULL);252 if (!info)253 return -EIO;254 255 memset(&output, 0, sizeof(output));256 257 size = *(u16 *) info->buffer.pointer;258 if (size < 12) {259 DRM_INFO("ATIF buffer is too small: %zu\n", size);260 err = -EINVAL;261 goto out;262 }263 size = min(sizeof(output), size);264 265 memcpy(&output, info->buffer.pointer, size);266 267 /* TODO: check version? */268 DRM_DEBUG_DRIVER("ATIF version %u\n", output.version);269 270 amdgpu_atif_parse_notification(&atif->notifications, output.notification_mask);271 amdgpu_atif_parse_functions(&atif->functions, output.function_bits);272 273out:274 kfree(info);275 return err;276}277 278/**279 * amdgpu_atif_get_notification_params - determine notify configuration280 *281 * @atif: acpi handle282 *283 * Execute the ATIF_FUNCTION_GET_SYSTEM_PARAMETERS ATIF function284 * to determine if a notifier is used and if so which one285 * (all asics). This is either Notify(VGA, 0x81) or Notify(VGA, n)286 * where n is specified in the result if a notifier is used.287 * Returns 0 on success, error on failure.288 */289static int amdgpu_atif_get_notification_params(struct amdgpu_atif *atif)290{291 union acpi_object *info;292 struct amdgpu_atif_notification_cfg *n = &atif->notification_cfg;293 struct atif_system_params params;294 size_t size;295 int err = 0;296 297 info = amdgpu_atif_call(atif, ATIF_FUNCTION_GET_SYSTEM_PARAMETERS,298 NULL);299 if (!info) {300 err = -EIO;301 goto out;302 }303 304 size = *(u16 *) info->buffer.pointer;305 if (size < 10) {306 err = -EINVAL;307 goto out;308 }309 310 memset(¶ms, 0, sizeof(params));311 size = min(sizeof(params), size);312 memcpy(¶ms, info->buffer.pointer, size);313 314 DRM_DEBUG_DRIVER("SYSTEM_PARAMS: mask = %#x, flags = %#x\n",315 params.flags, params.valid_mask);316 params.flags = params.flags & params.valid_mask;317 318 if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_NONE) {319 n->enabled = false;320 n->command_code = 0;321 } else if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_81) {322 n->enabled = true;323 n->command_code = 0x81;324 } else {325 if (size < 11) {326 err = -EINVAL;327 goto out;328 }329 n->enabled = true;330 n->command_code = params.command_code;331 }332 333out:334 DRM_DEBUG_DRIVER("Notification %s, command code = %#x\n",335 (n->enabled ? "enabled" : "disabled"),336 n->command_code);337 kfree(info);338 return err;339}340 341/**342 * amdgpu_atif_query_backlight_caps - get min and max backlight input signal343 *344 * @atif: acpi handle345 *346 * Execute the QUERY_BRIGHTNESS_TRANSFER_CHARACTERISTICS ATIF function347 * to determine the acceptable range of backlight values348 *349 * Backlight_caps.caps_valid will be set to true if the query is successful350 *351 * The input signals are in range 0-255352 *353 * This function assumes the display with backlight is the first LCD354 *355 * Returns 0 on success, error on failure.356 */357static int amdgpu_atif_query_backlight_caps(struct amdgpu_atif *atif)358{359 union acpi_object *info;360 struct atif_qbtc_output characteristics;361 struct atif_qbtc_arguments arguments;362 struct acpi_buffer params;363 size_t size;364 int err = 0;365 366 arguments.size = sizeof(arguments);367 arguments.requested_display = ATIF_QBTC_REQUEST_LCD1;368 369 params.length = sizeof(arguments);370 params.pointer = (void *)&arguments;371 372 info = amdgpu_atif_call(atif,373 ATIF_FUNCTION_QUERY_BRIGHTNESS_TRANSFER_CHARACTERISTICS,374 ¶ms);375 if (!info) {376 err = -EIO;377 goto out;378 }379 380 size = *(u16 *) info->buffer.pointer;381 if (size < 10) {382 err = -EINVAL;383 goto out;384 }385 386 memset(&characteristics, 0, sizeof(characteristics));387 size = min(sizeof(characteristics), size);388 memcpy(&characteristics, info->buffer.pointer, size);389 390 atif->backlight_caps.caps_valid = true;391 atif->backlight_caps.min_input_signal =392 characteristics.min_input_signal;393 atif->backlight_caps.max_input_signal =394 characteristics.max_input_signal;395 atif->backlight_caps.ac_level = characteristics.ac_level;396 atif->backlight_caps.dc_level = characteristics.dc_level;397out:398 kfree(info);399 return err;400}401 402/**403 * amdgpu_atif_get_sbios_requests - get requested sbios event404 *405 * @atif: acpi handle406 * @req: atif sbios request struct407 *408 * Execute the ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS ATIF function409 * to determine what requests the sbios is making to the driver410 * (all asics).411 * Returns 0 on success, error on failure.412 */413static int amdgpu_atif_get_sbios_requests(struct amdgpu_atif *atif,414 struct atif_sbios_requests *req)415{416 union acpi_object *info;417 size_t size;418 int count = 0;419 420 info = amdgpu_atif_call(atif, ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS,421 NULL);422 if (!info)423 return -EIO;424 425 size = *(u16 *)info->buffer.pointer;426 if (size < 0xd) {427 count = -EINVAL;428 goto out;429 }430 memset(req, 0, sizeof(*req));431 432 size = min(sizeof(*req), size);433 memcpy(req, info->buffer.pointer, size);434 DRM_DEBUG_DRIVER("SBIOS pending requests: %#x\n", req->pending);435 436 count = hweight32(req->pending);437 438out:439 kfree(info);440 return count;441}442 443/**444 * amdgpu_atif_handler - handle ATIF notify requests445 *446 * @adev: amdgpu_device pointer447 * @event: atif sbios request struct448 *449 * Checks the acpi event and if it matches an atif event,450 * handles it.451 *452 * Returns:453 * NOTIFY_BAD or NOTIFY_DONE, depending on the event.454 */455static int amdgpu_atif_handler(struct amdgpu_device *adev,456 struct acpi_bus_event *event)457{458 struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif;459 int count;460 461 DRM_DEBUG_DRIVER("event, device_class = %s, type = %#x\n",462 event->device_class, event->type);463 464 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)465 return NOTIFY_DONE;466 467 /* Is this actually our event? */468 if (!atif->notification_cfg.enabled ||469 event->type != atif->notification_cfg.command_code) {470 /* These events will generate keypresses otherwise */471 if (event->type == ACPI_VIDEO_NOTIFY_PROBE)472 return NOTIFY_BAD;473 else474 return NOTIFY_DONE;475 }476 477 if (atif->functions.sbios_requests) {478 struct atif_sbios_requests req;479 480 /* Check pending SBIOS requests */481 count = amdgpu_atif_get_sbios_requests(atif, &req);482 483 if (count <= 0)484 return NOTIFY_BAD;485 486 DRM_DEBUG_DRIVER("ATIF: %d pending SBIOS requests\n", count);487 488 if (req.pending & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST) {489 if (atif->bd) {490 DRM_DEBUG_DRIVER("Changing brightness to %d\n",491 req.backlight_level);492 /*493 * XXX backlight_device_set_brightness() is494 * hardwired to post BACKLIGHT_UPDATE_SYSFS.495 * It probably should accept 'reason' parameter.496 */497 backlight_device_set_brightness(atif->bd, req.backlight_level);498 }499 }500 501 if (req.pending & ATIF_DGPU_DISPLAY_EVENT) {502 if (adev->flags & AMD_IS_PX) {503 pm_runtime_get_sync(adev_to_drm(adev)->dev);504 /* Just fire off a uevent and let userspace tell us what to do */505 drm_helper_hpd_irq_event(adev_to_drm(adev));506 pm_runtime_mark_last_busy(adev_to_drm(adev)->dev);507 pm_runtime_put_autosuspend(adev_to_drm(adev)->dev);508 }509 }510 /* TODO: check other events */511 }512 513 /* We've handled the event, stop the notifier chain. The ACPI interface514 * overloads ACPI_VIDEO_NOTIFY_PROBE, we don't want to send that to515 * userspace if the event was generated only to signal a SBIOS516 * request.517 */518 return NOTIFY_BAD;519}520 521/* Call the ATCS method522 */523/**524 * amdgpu_atcs_call - call an ATCS method525 *526 * @atcs: atcs structure527 * @function: the ATCS function to execute528 * @params: ATCS function params529 *530 * Executes the requested ATCS function (all asics).531 * Returns a pointer to the acpi output buffer.532 */533static union acpi_object *amdgpu_atcs_call(struct amdgpu_atcs *atcs,534 int function,535 struct acpi_buffer *params)536{537 acpi_status status;538 union acpi_object atcs_arg_elements[2];539 struct acpi_object_list atcs_arg;540 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };541 542 atcs_arg.count = 2;543 atcs_arg.pointer = &atcs_arg_elements[0];544 545 atcs_arg_elements[0].type = ACPI_TYPE_INTEGER;546 atcs_arg_elements[0].integer.value = function;547 548 if (params) {549 atcs_arg_elements[1].type = ACPI_TYPE_BUFFER;550 atcs_arg_elements[1].buffer.length = params->length;551 atcs_arg_elements[1].buffer.pointer = params->pointer;552 } else {553 /* We need a second fake parameter */554 atcs_arg_elements[1].type = ACPI_TYPE_INTEGER;555 atcs_arg_elements[1].integer.value = 0;556 }557 558 status = acpi_evaluate_object(atcs->handle, NULL, &atcs_arg, &buffer);559 560 /* Fail only if calling the method fails and ATIF is supported */561 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {562 DRM_DEBUG_DRIVER("failed to evaluate ATCS got %s\n",563 acpi_format_exception(status));564 kfree(buffer.pointer);565 return NULL;566 }567 568 return buffer.pointer;569}570 571/**572 * amdgpu_atcs_parse_functions - parse supported functions573 *574 * @f: supported functions struct575 * @mask: supported functions mask from ATCS576 *577 * Use the supported functions mask from ATCS function578 * ATCS_FUNCTION_VERIFY_INTERFACE to determine what functions579 * are supported (all asics).580 */581static void amdgpu_atcs_parse_functions(struct amdgpu_atcs_functions *f, u32 mask)582{583 f->get_ext_state = mask & ATCS_GET_EXTERNAL_STATE_SUPPORTED;584 f->pcie_perf_req = mask & ATCS_PCIE_PERFORMANCE_REQUEST_SUPPORTED;585 f->pcie_dev_rdy = mask & ATCS_PCIE_DEVICE_READY_NOTIFICATION_SUPPORTED;586 f->pcie_bus_width = mask & ATCS_SET_PCIE_BUS_WIDTH_SUPPORTED;587 f->power_shift_control = mask & ATCS_SET_POWER_SHIFT_CONTROL_SUPPORTED;588}589 590/**591 * amdgpu_atcs_verify_interface - verify ATCS592 *593 * @atcs: amdgpu atcs struct594 *595 * Execute the ATCS_FUNCTION_VERIFY_INTERFACE ATCS function596 * to initialize ATCS and determine what features are supported597 * (all asics).598 * returns 0 on success, error on failure.599 */600static int amdgpu_atcs_verify_interface(struct amdgpu_atcs *atcs)601{602 union acpi_object *info;603 struct atcs_verify_interface output;604 size_t size;605 int err = 0;606 607 info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_VERIFY_INTERFACE, NULL);608 if (!info)609 return -EIO;610 611 memset(&output, 0, sizeof(output));612 613 size = *(u16 *) info->buffer.pointer;614 if (size < 8) {615 DRM_INFO("ATCS buffer is too small: %zu\n", size);616 err = -EINVAL;617 goto out;618 }619 size = min(sizeof(output), size);620 621 memcpy(&output, info->buffer.pointer, size);622 623 /* TODO: check version? */624 DRM_DEBUG_DRIVER("ATCS version %u\n", output.version);625 626 amdgpu_atcs_parse_functions(&atcs->functions, output.function_bits);627 628out:629 kfree(info);630 return err;631}632 633/**634 * amdgpu_acpi_is_pcie_performance_request_supported635 *636 * @adev: amdgpu_device pointer637 *638 * Check if the ATCS pcie_perf_req and pcie_dev_rdy methods639 * are supported (all asics).640 * returns true if supported, false if not.641 */642bool amdgpu_acpi_is_pcie_performance_request_supported(struct amdgpu_device *adev)643{644 struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;645 646 if (atcs->functions.pcie_perf_req && atcs->functions.pcie_dev_rdy)647 return true;648 649 return false;650}651 652/**653 * amdgpu_acpi_is_power_shift_control_supported654 *655 * Check if the ATCS power shift control method656 * is supported.657 * returns true if supported, false if not.658 */659bool amdgpu_acpi_is_power_shift_control_supported(void)660{661 return amdgpu_acpi_priv.atcs.functions.power_shift_control;662}663 664/**665 * amdgpu_acpi_pcie_notify_device_ready666 *667 * @adev: amdgpu_device pointer668 *669 * Executes the PCIE_DEVICE_READY_NOTIFICATION method670 * (all asics).671 * returns 0 on success, error on failure.672 */673int amdgpu_acpi_pcie_notify_device_ready(struct amdgpu_device *adev)674{675 union acpi_object *info;676 struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;677 678 if (!atcs->functions.pcie_dev_rdy)679 return -EINVAL;680 681 info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_PCIE_DEVICE_READY_NOTIFICATION, NULL);682 if (!info)683 return -EIO;684 685 kfree(info);686 687 return 0;688}689 690/**691 * amdgpu_acpi_pcie_performance_request692 *693 * @adev: amdgpu_device pointer694 * @perf_req: requested perf level (pcie gen speed)695 * @advertise: set advertise caps flag if set696 *697 * Executes the PCIE_PERFORMANCE_REQUEST method to698 * change the pcie gen speed (all asics).699 * returns 0 on success, error on failure.700 */701int amdgpu_acpi_pcie_performance_request(struct amdgpu_device *adev,702 u8 perf_req, bool advertise)703{704 union acpi_object *info;705 struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;706 struct atcs_pref_req_input atcs_input;707 struct atcs_pref_req_output atcs_output;708 struct acpi_buffer params;709 size_t size;710 u32 retry = 3;711 712 if (amdgpu_acpi_pcie_notify_device_ready(adev))713 return -EINVAL;714 715 if (!atcs->functions.pcie_perf_req)716 return -EINVAL;717 718 atcs_input.size = sizeof(struct atcs_pref_req_input);719 /* client id (bit 2-0: func num, 7-3: dev num, 15-8: bus num) */720 atcs_input.client_id = pci_dev_id(adev->pdev);721 atcs_input.valid_flags_mask = ATCS_VALID_FLAGS_MASK;722 atcs_input.flags = ATCS_WAIT_FOR_COMPLETION;723 if (advertise)724 atcs_input.flags |= ATCS_ADVERTISE_CAPS;725 atcs_input.req_type = ATCS_PCIE_LINK_SPEED;726 atcs_input.perf_req = perf_req;727 728 params.length = sizeof(struct atcs_pref_req_input);729 params.pointer = &atcs_input;730 731 while (retry--) {732 info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_PCIE_PERFORMANCE_REQUEST, ¶ms);733 if (!info)734 return -EIO;735 736 memset(&atcs_output, 0, sizeof(atcs_output));737 738 size = *(u16 *) info->buffer.pointer;739 if (size < 3) {740 DRM_INFO("ATCS buffer is too small: %zu\n", size);741 kfree(info);742 return -EINVAL;743 }744 size = min(sizeof(atcs_output), size);745 746 memcpy(&atcs_output, info->buffer.pointer, size);747 748 kfree(info);749 750 switch (atcs_output.ret_val) {751 case ATCS_REQUEST_REFUSED:752 default:753 return -EINVAL;754 case ATCS_REQUEST_COMPLETE:755 return 0;756 case ATCS_REQUEST_IN_PROGRESS:757 udelay(10);758 break;759 }760 }761 762 return 0;763}764 765/**766 * amdgpu_acpi_power_shift_control767 *768 * @adev: amdgpu_device pointer769 * @dev_state: device acpi state770 * @drv_state: driver state771 *772 * Executes the POWER_SHIFT_CONTROL method to773 * communicate current dGPU device state and774 * driver state to APU/SBIOS.775 * returns 0 on success, error on failure.776 */777int amdgpu_acpi_power_shift_control(struct amdgpu_device *adev,778 u8 dev_state, bool drv_state)779{780 union acpi_object *info;781 struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;782 struct atcs_pwr_shift_input atcs_input;783 struct acpi_buffer params;784 785 if (!amdgpu_acpi_is_power_shift_control_supported())786 return -EINVAL;787 788 atcs_input.size = sizeof(struct atcs_pwr_shift_input);789 /* dGPU id (bit 2-0: func num, 7-3: dev num, 15-8: bus num) */790 atcs_input.dgpu_id = pci_dev_id(adev->pdev);791 atcs_input.dev_acpi_state = dev_state;792 atcs_input.drv_state = drv_state;793 794 params.length = sizeof(struct atcs_pwr_shift_input);795 params.pointer = &atcs_input;796 797 info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_POWER_SHIFT_CONTROL, ¶ms);798 if (!info) {799 DRM_ERROR("ATCS PSC update failed\n");800 return -EIO;801 }802 803 return 0;804}805 806/**807 * amdgpu_acpi_smart_shift_update - update dGPU device state to SBIOS808 *809 * @dev: drm_device pointer810 * @ss_state: current smart shift event811 *812 * returns 0 on success,813 * otherwise return error number.814 */815int amdgpu_acpi_smart_shift_update(struct drm_device *dev, enum amdgpu_ss ss_state)816{817 struct amdgpu_device *adev = drm_to_adev(dev);818 int r;819 820 if (!amdgpu_device_supports_smart_shift(dev))821 return 0;822 823 switch (ss_state) {824 /* SBIOS trigger “stop”, “enable” and “start” at D0, Driver Operational.825 * SBIOS trigger “stop” at D3, Driver Not Operational.826 * SBIOS trigger “stop” and “disable” at D0, Driver NOT operational.827 */828 case AMDGPU_SS_DRV_LOAD:829 r = amdgpu_acpi_power_shift_control(adev,830 AMDGPU_ATCS_PSC_DEV_STATE_D0,831 AMDGPU_ATCS_PSC_DRV_STATE_OPR);832 break;833 case AMDGPU_SS_DEV_D0:834 r = amdgpu_acpi_power_shift_control(adev,835 AMDGPU_ATCS_PSC_DEV_STATE_D0,836 AMDGPU_ATCS_PSC_DRV_STATE_OPR);837 break;838 case AMDGPU_SS_DEV_D3:839 r = amdgpu_acpi_power_shift_control(adev,840 AMDGPU_ATCS_PSC_DEV_STATE_D3_HOT,841 AMDGPU_ATCS_PSC_DRV_STATE_NOT_OPR);842 break;843 case AMDGPU_SS_DRV_UNLOAD:844 r = amdgpu_acpi_power_shift_control(adev,845 AMDGPU_ATCS_PSC_DEV_STATE_D0,846 AMDGPU_ATCS_PSC_DRV_STATE_NOT_OPR);847 break;848 default:849 return -EINVAL;850 }851 852 return r;853}854 855#ifdef CONFIG_ACPI_NUMA856static inline uint64_t amdgpu_acpi_get_numa_size(int nid)857{858 /* This is directly using si_meminfo_node implementation as the859 * function is not exported.860 */861 int zone_type;862 uint64_t managed_pages = 0;863 864 pg_data_t *pgdat = NODE_DATA(nid);865 866 for (zone_type = 0; zone_type < MAX_NR_ZONES; zone_type++)867 managed_pages +=868 zone_managed_pages(&pgdat->node_zones[zone_type]);869 return managed_pages * PAGE_SIZE;870}871 872static struct amdgpu_numa_info *amdgpu_acpi_get_numa_info(uint32_t pxm)873{874 struct amdgpu_numa_info *numa_info;875 int nid;876 877 numa_info = xa_load(&numa_info_xa, pxm);878 879 if (!numa_info) {880 struct sysinfo info;881 882 numa_info = kzalloc(sizeof(*numa_info), GFP_KERNEL);883 if (!numa_info)884 return NULL;885 886 nid = pxm_to_node(pxm);887 numa_info->pxm = pxm;888 numa_info->nid = nid;889 890 if (numa_info->nid == NUMA_NO_NODE) {891 si_meminfo(&info);892 numa_info->size = info.totalram * info.mem_unit;893 } else {894 numa_info->size = amdgpu_acpi_get_numa_size(nid);895 }896 xa_store(&numa_info_xa, numa_info->pxm, numa_info, GFP_KERNEL);897 }898 899 return numa_info;900}901#endif902 903/**904 * amdgpu_acpi_get_node_id - obtain the NUMA node id for corresponding amdgpu905 * acpi device handle906 *907 * @handle: acpi handle908 * @numa_info: amdgpu_numa_info structure holding numa information909 *910 * Queries the ACPI interface to fetch the corresponding NUMA Node ID for a911 * given amdgpu acpi device.912 *913 * Returns ACPI STATUS OK with Node ID on success or the corresponding failure reason914 */915static acpi_status amdgpu_acpi_get_node_id(acpi_handle handle,916 struct amdgpu_numa_info **numa_info)917{918#ifdef CONFIG_ACPI_NUMA919 u64 pxm;920 acpi_status status;921 922 if (!numa_info)923 return_ACPI_STATUS(AE_ERROR);924 925 status = acpi_evaluate_integer(handle, "_PXM", NULL, &pxm);926 927 if (ACPI_FAILURE(status))928 return status;929 930 *numa_info = amdgpu_acpi_get_numa_info(pxm);931 932 if (!*numa_info)933 return_ACPI_STATUS(AE_ERROR);934 935 return_ACPI_STATUS(AE_OK);936#else937 return_ACPI_STATUS(AE_NOT_EXIST);938#endif939}940 941static struct amdgpu_acpi_dev_info *amdgpu_acpi_get_dev(u32 sbdf)942{943 struct amdgpu_acpi_dev_info *acpi_dev;944 945 if (list_empty(&amdgpu_acpi_dev_list))946 return NULL;947 948 list_for_each_entry(acpi_dev, &amdgpu_acpi_dev_list, list)949 if (acpi_dev->sbdf == sbdf)950 return acpi_dev;951 952 return NULL;953}954 955static int amdgpu_acpi_dev_init(struct amdgpu_acpi_dev_info **dev_info,956 struct amdgpu_acpi_xcc_info *xcc_info, u32 sbdf)957{958 struct amdgpu_acpi_dev_info *tmp;959 union acpi_object *obj;960 int ret = -ENOENT;961 962 *dev_info = NULL;963 tmp = kzalloc(sizeof(struct amdgpu_acpi_dev_info), GFP_KERNEL);964 if (!tmp)965 return -ENOMEM;966 967 INIT_LIST_HEAD(&tmp->xcc_list);968 INIT_LIST_HEAD(&tmp->list);969 tmp->sbdf = sbdf;970 971 obj = acpi_evaluate_dsm_typed(xcc_info->handle, &amd_xcc_dsm_guid, 0,972 AMD_XCC_DSM_GET_SUPP_MODE, NULL,973 ACPI_TYPE_INTEGER);974 975 if (!obj) {976 acpi_handle_debug(xcc_info->handle,977 "_DSM function %d evaluation failed",978 AMD_XCC_DSM_GET_SUPP_MODE);979 ret = -ENOENT;980 goto out;981 }982 983 tmp->supp_xcp_mode = obj->integer.value & 0xFFFF;984 ACPI_FREE(obj);985 986 obj = acpi_evaluate_dsm_typed(xcc_info->handle, &amd_xcc_dsm_guid, 0,987 AMD_XCC_DSM_GET_XCP_MODE, NULL,988 ACPI_TYPE_INTEGER);989 990 if (!obj) {991 acpi_handle_debug(xcc_info->handle,992 "_DSM function %d evaluation failed",993 AMD_XCC_DSM_GET_XCP_MODE);994 ret = -ENOENT;995 goto out;996 }997 998 tmp->xcp_mode = obj->integer.value & 0xFFFF;999 tmp->mem_mode = (obj->integer.value >> 32) & 0xFFFF;1000 ACPI_FREE(obj);1001 1002 /* Evaluate DSMs and fill XCC information */1003 obj = acpi_evaluate_dsm_typed(xcc_info->handle, &amd_xcc_dsm_guid, 0,1004 AMD_XCC_DSM_GET_TMR_INFO, NULL,1005 ACPI_TYPE_PACKAGE);1006 1007 if (!obj || obj->package.count < 2) {1008 acpi_handle_debug(xcc_info->handle,1009 "_DSM function %d evaluation failed",1010 AMD_XCC_DSM_GET_TMR_INFO);1011 ret = -ENOENT;1012 goto out;1013 }1014 1015 tmp->tmr_base = obj->package.elements[0].integer.value;1016 tmp->tmr_size = obj->package.elements[1].integer.value;1017 ACPI_FREE(obj);1018 1019 DRM_DEBUG_DRIVER(1020 "New dev(%x): Supported xcp mode: %x curr xcp_mode : %x mem mode : %x, tmr base: %llx tmr size: %llx ",1021 tmp->sbdf, tmp->supp_xcp_mode, tmp->xcp_mode, tmp->mem_mode,1022 tmp->tmr_base, tmp->tmr_size);1023 list_add_tail(&tmp->list, &amdgpu_acpi_dev_list);1024 *dev_info = tmp;1025 1026 return 0;1027 1028out:1029 if (obj)1030 ACPI_FREE(obj);1031 kfree(tmp);1032 1033 return ret;1034}1035 1036static int amdgpu_acpi_get_xcc_info(struct amdgpu_acpi_xcc_info *xcc_info,1037 u32 *sbdf)1038{1039 union acpi_object *obj;1040 acpi_status status;1041 int ret = -ENOENT;1042 1043 obj = acpi_evaluate_dsm_typed(xcc_info->handle, &amd_xcc_dsm_guid, 0,1044 AMD_XCC_DSM_GET_NUM_FUNCS, NULL,1045 ACPI_TYPE_INTEGER);1046 1047 if (!obj || obj->integer.value != AMD_XCC_DSM_NUM_FUNCS)1048 goto out;1049 ACPI_FREE(obj);1050 1051 /* Evaluate DSMs and fill XCC information */1052 obj = acpi_evaluate_dsm_typed(xcc_info->handle, &amd_xcc_dsm_guid, 0,1053 AMD_XCC_DSM_GET_VF_XCC_MAPPING, NULL,1054 ACPI_TYPE_INTEGER);1055 1056 if (!obj) {1057 acpi_handle_debug(xcc_info->handle,1058 "_DSM function %d evaluation failed",1059 AMD_XCC_DSM_GET_VF_XCC_MAPPING);1060 ret = -EINVAL;1061 goto out;1062 }1063 1064 /* PF xcc id [39:32] */1065 xcc_info->phy_id = (obj->integer.value >> 32) & 0xFF;1066 /* xcp node of this xcc [47:40] */1067 xcc_info->xcp_node = (obj->integer.value >> 40) & 0xFF;1068 /* PF domain of this xcc [31:16] */1069 *sbdf = (obj->integer.value) & 0xFFFF0000;1070 /* PF bus/dev/fn of this xcc [63:48] */1071 *sbdf |= (obj->integer.value >> 48) & 0xFFFF;1072 ACPI_FREE(obj);1073 obj = NULL;1074 1075 status =1076 amdgpu_acpi_get_node_id(xcc_info->handle, &xcc_info->numa_info);1077 1078 /* TODO: check if this check is required */1079 if (ACPI_SUCCESS(status))1080 ret = 0;1081out:1082 if (obj)1083 ACPI_FREE(obj);1084 1085 return ret;1086}1087 1088static int amdgpu_acpi_enumerate_xcc(void)1089{1090 struct amdgpu_acpi_dev_info *dev_info = NULL;1091 struct amdgpu_acpi_xcc_info *xcc_info;1092 struct acpi_device *acpi_dev;1093 char hid[ACPI_ID_LEN];1094 int ret, id;1095 u32 sbdf;1096 1097 INIT_LIST_HEAD(&amdgpu_acpi_dev_list);1098 xa_init(&numa_info_xa);1099 1100 for (id = 0; id < AMD_XCC_MAX_HID; id++) {1101 sprintf(hid, "%s%d", "AMD", AMD_XCC_HID_START + id);1102 acpi_dev = acpi_dev_get_first_match_dev(hid, NULL, -1);1103 /* These ACPI objects are expected to be in sequential order. If1104 * one is not found, no need to check the rest.1105 */1106 if (!acpi_dev) {1107 DRM_DEBUG_DRIVER("No matching acpi device found for %s",1108 hid);1109 break;1110 }1111 1112 xcc_info = kzalloc(sizeof(struct amdgpu_acpi_xcc_info),1113 GFP_KERNEL);1114 if (!xcc_info) {1115 DRM_ERROR("Failed to allocate memory for xcc info\n");1116 return -ENOMEM;1117 }1118 1119 INIT_LIST_HEAD(&xcc_info->list);1120 xcc_info->handle = acpi_device_handle(acpi_dev);1121 acpi_dev_put(acpi_dev);1122 1123 ret = amdgpu_acpi_get_xcc_info(xcc_info, &sbdf);1124 if (ret) {1125 kfree(xcc_info);1126 continue;1127 }1128 1129 dev_info = amdgpu_acpi_get_dev(sbdf);1130 1131 if (!dev_info)1132 ret = amdgpu_acpi_dev_init(&dev_info, xcc_info, sbdf);1133 1134 if (ret == -ENOMEM)1135 return ret;1136 1137 if (!dev_info) {1138 kfree(xcc_info);1139 continue;1140 }1141 1142 list_add_tail(&xcc_info->list, &dev_info->xcc_list);1143 }1144 1145 return 0;1146}1147 1148int amdgpu_acpi_get_tmr_info(struct amdgpu_device *adev, u64 *tmr_offset,1149 u64 *tmr_size)1150{1151 struct amdgpu_acpi_dev_info *dev_info;1152 u32 sbdf;1153 1154 if (!tmr_offset || !tmr_size)1155 return -EINVAL;1156 1157 sbdf = (pci_domain_nr(adev->pdev->bus) << 16);1158 sbdf |= pci_dev_id(adev->pdev);1159 dev_info = amdgpu_acpi_get_dev(sbdf);1160 if (!dev_info)1161 return -ENOENT;1162 1163 *tmr_offset = dev_info->tmr_base;1164 *tmr_size = dev_info->tmr_size;1165 1166 return 0;1167}1168 1169int amdgpu_acpi_get_mem_info(struct amdgpu_device *adev, int xcc_id,1170 struct amdgpu_numa_info *numa_info)1171{1172 struct amdgpu_acpi_dev_info *dev_info;1173 struct amdgpu_acpi_xcc_info *xcc_info;1174 u32 sbdf;1175 1176 if (!numa_info)1177 return -EINVAL;1178 1179 sbdf = (pci_domain_nr(adev->pdev->bus) << 16);1180 sbdf |= pci_dev_id(adev->pdev);1181 dev_info = amdgpu_acpi_get_dev(sbdf);1182 if (!dev_info)1183 return -ENOENT;1184 1185 list_for_each_entry(xcc_info, &dev_info->xcc_list, list) {1186 if (xcc_info->phy_id == xcc_id) {1187 memcpy(numa_info, xcc_info->numa_info,1188 sizeof(*numa_info));1189 return 0;1190 }1191 }1192 1193 return -ENOENT;1194}1195 1196/**1197 * amdgpu_acpi_event - handle notify events1198 *1199 * @nb: notifier block1200 * @val: val1201 * @data: acpi event1202 *1203 * Calls relevant amdgpu functions in response to various1204 * acpi events.1205 * Returns NOTIFY code1206 */1207static int amdgpu_acpi_event(struct notifier_block *nb,1208 unsigned long val,1209 void *data)1210{1211 struct amdgpu_device *adev = container_of(nb, struct amdgpu_device, acpi_nb);1212 struct acpi_bus_event *entry = (struct acpi_bus_event *)data;1213 1214 if (strcmp(entry->device_class, ACPI_AC_CLASS) == 0) {1215 if (power_supply_is_system_supplied() > 0)1216 DRM_DEBUG_DRIVER("pm: AC\n");1217 else1218 DRM_DEBUG_DRIVER("pm: DC\n");1219 1220 amdgpu_pm_acpi_event_handler(adev);1221 }1222 1223 /* Check for pending SBIOS requests */1224 return amdgpu_atif_handler(adev, entry);1225}1226 1227/* Call all ACPI methods here */1228/**1229 * amdgpu_acpi_init - init driver acpi support1230 *1231 * @adev: amdgpu_device pointer1232 *1233 * Verifies the AMD ACPI interfaces and registers with the acpi1234 * notifier chain (all asics).1235 * Returns 0 on success, error on failure.1236 */1237int amdgpu_acpi_init(struct amdgpu_device *adev)1238{1239 struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif;1240 1241 if (atif->notifications.brightness_change) {1242 if (adev->dc_enabled) {1243#if defined(CONFIG_DRM_AMD_DC)1244 struct amdgpu_display_manager *dm = &adev->dm;1245 1246 if (dm->backlight_dev[0])1247 atif->bd = dm->backlight_dev[0];1248#endif1249 } else {1250 struct drm_encoder *tmp;1251 1252 /* Find the encoder controlling the brightness */1253 list_for_each_entry(tmp, &adev_to_drm(adev)->mode_config.encoder_list,1254 head) {1255 struct amdgpu_encoder *enc = to_amdgpu_encoder(tmp);1256 1257 if ((enc->devices & (ATOM_DEVICE_LCD_SUPPORT)) &&1258 enc->enc_priv) {1259 struct amdgpu_encoder_atom_dig *dig = enc->enc_priv;1260 1261 if (dig->bl_dev) {1262 atif->bd = dig->bl_dev;1263 break;1264 }1265 }1266 }1267 }1268 }1269 adev->acpi_nb.notifier_call = amdgpu_acpi_event;1270 register_acpi_notifier(&adev->acpi_nb);1271 1272 return 0;1273}1274 1275void amdgpu_acpi_get_backlight_caps(struct amdgpu_dm_backlight_caps *caps)1276{1277 struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif;1278 1279 caps->caps_valid = atif->backlight_caps.caps_valid;1280 caps->min_input_signal = atif->backlight_caps.min_input_signal;1281 caps->max_input_signal = atif->backlight_caps.max_input_signal;1282 caps->ac_level = atif->backlight_caps.ac_level;1283 caps->dc_level = atif->backlight_caps.dc_level;1284}1285 1286/**1287 * amdgpu_acpi_fini - tear down driver acpi support1288 *1289 * @adev: amdgpu_device pointer1290 *1291 * Unregisters with the acpi notifier chain (all asics).1292 */1293void amdgpu_acpi_fini(struct amdgpu_device *adev)1294{1295 unregister_acpi_notifier(&adev->acpi_nb);1296}1297 1298/**1299 * amdgpu_atif_pci_probe_handle - look up the ATIF handle1300 *1301 * @pdev: pci device1302 *1303 * Look up the ATIF handles (all asics).1304 * Returns true if the handle is found, false if not.1305 */1306static bool amdgpu_atif_pci_probe_handle(struct pci_dev *pdev)1307{1308 char acpi_method_name[255] = { 0 };1309 struct acpi_buffer buffer = {sizeof(acpi_method_name), acpi_method_name};1310 acpi_handle dhandle, atif_handle;1311 acpi_status status;1312 int ret;1313 1314 dhandle = ACPI_HANDLE(&pdev->dev);1315 if (!dhandle)1316 return false;1317 1318 status = acpi_get_handle(dhandle, "ATIF", &atif_handle);1319 if (ACPI_FAILURE(status))1320 return false;1321 1322 amdgpu_acpi_priv.atif.handle = atif_handle;1323 acpi_get_name(amdgpu_acpi_priv.atif.handle, ACPI_FULL_PATHNAME, &buffer);1324 DRM_DEBUG_DRIVER("Found ATIF handle %s\n", acpi_method_name);1325 ret = amdgpu_atif_verify_interface(&amdgpu_acpi_priv.atif);1326 if (ret) {1327 amdgpu_acpi_priv.atif.handle = 0;1328 return false;1329 }1330 return true;1331}1332 1333/**1334 * amdgpu_atcs_pci_probe_handle - look up the ATCS handle1335 *1336 * @pdev: pci device1337 *1338 * Look up the ATCS handles (all asics).1339 * Returns true if the handle is found, false if not.1340 */1341static bool amdgpu_atcs_pci_probe_handle(struct pci_dev *pdev)1342{1343 char acpi_method_name[255] = { 0 };1344 struct acpi_buffer buffer = { sizeof(acpi_method_name), acpi_method_name };1345 acpi_handle dhandle, atcs_handle;1346 acpi_status status;1347 int ret;1348 1349 dhandle = ACPI_HANDLE(&pdev->dev);1350 if (!dhandle)1351 return false;1352 1353 status = acpi_get_handle(dhandle, "ATCS", &atcs_handle);1354 if (ACPI_FAILURE(status))1355 return false;1356 1357 amdgpu_acpi_priv.atcs.handle = atcs_handle;1358 acpi_get_name(amdgpu_acpi_priv.atcs.handle, ACPI_FULL_PATHNAME, &buffer);1359 DRM_DEBUG_DRIVER("Found ATCS handle %s\n", acpi_method_name);1360 ret = amdgpu_atcs_verify_interface(&amdgpu_acpi_priv.atcs);1361 if (ret) {1362 amdgpu_acpi_priv.atcs.handle = 0;1363 return false;1364 }1365 return true;1366}1367 1368 1369/**1370 * amdgpu_acpi_should_gpu_reset1371 *1372 * @adev: amdgpu_device_pointer1373 *1374 * returns true if should reset GPU, false if not1375 */1376bool amdgpu_acpi_should_gpu_reset(struct amdgpu_device *adev)1377{1378 if ((adev->flags & AMD_IS_APU) &&1379 adev->gfx.imu.funcs) /* Not need to do mode2 reset for IMU enabled APUs */1380 return false;1381 1382 if ((adev->flags & AMD_IS_APU) &&1383 amdgpu_acpi_is_s3_active(adev))1384 return false;1385 1386 if (amdgpu_sriov_vf(adev))1387 return false;1388 1389#if IS_ENABLED(CONFIG_SUSPEND)1390 return pm_suspend_target_state != PM_SUSPEND_TO_IDLE;1391#else1392 return true;1393#endif1394}1395 1396/*1397 * amdgpu_acpi_detect - detect ACPI ATIF/ATCS methods1398 *1399 * Check if we have the ATIF/ATCS methods and populate1400 * the structures in the driver.1401 */1402void amdgpu_acpi_detect(void)1403{1404 struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif;1405 struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;1406 struct pci_dev *pdev = NULL;1407 int ret;1408 1409 while ((pdev = pci_get_base_class(PCI_BASE_CLASS_DISPLAY, pdev))) {1410 if ((pdev->class != PCI_CLASS_DISPLAY_VGA << 8) &&1411 (pdev->class != PCI_CLASS_DISPLAY_OTHER << 8))1412 continue;1413 1414 if (!atif->handle)1415 amdgpu_atif_pci_probe_handle(pdev);1416 if (!atcs->handle)1417 amdgpu_atcs_pci_probe_handle(pdev);1418 }1419 1420 if (atif->functions.sbios_requests && !atif->functions.system_params) {1421 /* XXX check this workraround, if sbios request function is1422 * present we have to see how it's configured in the system1423 * params1424 */1425 atif->functions.system_params = true;1426 }1427 1428 if (atif->functions.system_params) {1429 ret = amdgpu_atif_get_notification_params(atif);1430 if (ret) {1431 DRM_DEBUG_DRIVER("Call to GET_SYSTEM_PARAMS failed: %d\n",1432 ret);1433 /* Disable notification */1434 atif->notification_cfg.enabled = false;1435 }1436 }1437 1438 if (atif->functions.query_backlight_transfer_characteristics) {1439 ret = amdgpu_atif_query_backlight_caps(atif);1440 if (ret) {1441 DRM_DEBUG_DRIVER("Call to QUERY_BACKLIGHT_TRANSFER_CHARACTERISTICS failed: %d\n",1442 ret);1443 atif->backlight_caps.caps_valid = false;1444 }1445 } else {1446 atif->backlight_caps.caps_valid = false;1447 }1448 1449 amdgpu_acpi_enumerate_xcc();1450}1451 1452void amdgpu_acpi_release(void)1453{1454 struct amdgpu_acpi_dev_info *dev_info, *dev_tmp;1455 struct amdgpu_acpi_xcc_info *xcc_info, *xcc_tmp;1456 struct amdgpu_numa_info *numa_info;1457 unsigned long index;1458 1459 xa_for_each(&numa_info_xa, index, numa_info) {1460 kfree(numa_info);1461 xa_erase(&numa_info_xa, index);1462 }1463 1464 if (list_empty(&amdgpu_acpi_dev_list))1465 return;1466 1467 list_for_each_entry_safe(dev_info, dev_tmp, &amdgpu_acpi_dev_list,1468 list) {1469 list_for_each_entry_safe(xcc_info, xcc_tmp, &dev_info->xcc_list,1470 list) {1471 list_del(&xcc_info->list);1472 kfree(xcc_info);1473 }1474 1475 list_del(&dev_info->list);1476 kfree(dev_info);1477 }1478}1479 1480#if IS_ENABLED(CONFIG_SUSPEND)1481/**1482 * amdgpu_acpi_is_s3_active1483 *1484 * @adev: amdgpu_device_pointer1485 *1486 * returns true if supported, false if not.1487 */1488bool amdgpu_acpi_is_s3_active(struct amdgpu_device *adev)1489{1490 return !(adev->flags & AMD_IS_APU) ||1491 (pm_suspend_target_state == PM_SUSPEND_MEM);1492}1493 1494/**1495 * amdgpu_acpi_is_s0ix_active1496 *1497 * @adev: amdgpu_device_pointer1498 *1499 * returns true if supported, false if not.1500 */1501bool amdgpu_acpi_is_s0ix_active(struct amdgpu_device *adev)1502{1503 if (!(adev->flags & AMD_IS_APU) ||1504 (pm_suspend_target_state != PM_SUSPEND_TO_IDLE))1505 return false;1506 1507 if (adev->asic_type < CHIP_RAVEN)1508 return false;1509 1510 if (!(adev->pm.pp_feature & PP_GFXOFF_MASK))1511 return false;1512 1513 /*1514 * If ACPI_FADT_LOW_POWER_S0 is not set in the FADT, it is generally1515 * risky to do any special firmware-related preparations for entering1516 * S0ix even though the system is suspending to idle, so return false1517 * in that case.1518 */1519 if (!(acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0)) {1520 dev_err_once(adev->dev,1521 "Power consumption will be higher as BIOS has not been configured for suspend-to-idle.\n"1522 "To use suspend-to-idle change the sleep mode in BIOS setup.\n");1523 return false;1524 }1525 1526#if !IS_ENABLED(CONFIG_AMD_PMC)1527 dev_err_once(adev->dev,1528 "Power consumption will be higher as the kernel has not been compiled with CONFIG_AMD_PMC.\n");1529 return false;1530#else1531 return true;1532#endif /* CONFIG_AMD_PMC */1533}1534 1535/**1536 * amdgpu_choose_low_power_state1537 *1538 * @adev: amdgpu_device_pointer1539 *1540 * Choose the target low power state for the GPU1541 */1542void amdgpu_choose_low_power_state(struct amdgpu_device *adev)1543{1544 if (adev->in_runpm)1545 return;1546 1547 if (amdgpu_acpi_is_s0ix_active(adev))1548 adev->in_s0ix = true;1549 else if (amdgpu_acpi_is_s3_active(adev))1550 adev->in_s3 = true;1551}1552 1553#endif /* CONFIG_SUSPEND */1554