1// SPDX-License-Identifier: MIT
   2/*
   3 * Copyright 2012 Advanced Micro Devices, Inc.
   4 *
   5 * Permission is hereby granted, free of charge, to any person obtaining a
   6 * copy of this software and associated documentation files (the "Software"),
   7 * to deal in the Software without restriction, including without limitation
   8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9 * and/or sell copies of the Software, and to permit persons to whom the
  10 * Software is furnished to do so, subject to the following conditions:
  11 *
  12 * The above copyright notice and this permission notice shall be included in
  13 * all copies or substantial portions of the Software.
  14 *
  15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  19 * 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 OR
  21 * 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 3000
  48#define AMD_XCC_DSM_GET_NUM_FUNCS 0
  49#define AMD_XCC_DSM_GET_SUPP_MODE 1
  50#define AMD_XCC_DSM_GET_XCP_MODE 2
  51#define AMD_XCC_DSM_GET_VF_XCC_MAPPING 4
  52#define AMD_XCC_DSM_GET_TMR_INFO 5
  53#define AMD_XCC_DSM_NUM_FUNCS 5
  54
  55#define AMD_XCC_MAX_HID 24
  56
  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 method
 134 */
 135/**
 136 * amdgpu_atif_call - call an ATIF method
 137 *
 138 * @atif: atif structure
 139 * @function: the ATIF function to execute
 140 * @params: ATIF function params
 141 *
 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 atif_arg_elements[2];
 151	struct acpi_object_list atif_arg;
 152	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 153
 154	atif_arg.count = 2;
 155	atif_arg.pointer = &atif_arg_elements[0];
 156
 157	atif_arg_elements[0].type = ACPI_TYPE_INTEGER;
 158	atif_arg_elements[0].integer.value = function;
 159
 160	if (params) {
 161		atif_arg_elements[1].type = ACPI_TYPE_BUFFER;
 162		atif_arg_elements[1].buffer.length = params->length;
 163		atif_arg_elements[1].buffer.pointer = params->pointer;
 164	} else {
 165		/* We need a second fake parameter */
 166		atif_arg_elements[1].type = ACPI_TYPE_INTEGER;
 167		atif_arg_elements[1].integer.value = 0;
 168	}
 169
 170	status = acpi_evaluate_object(atif->handle, NULL, &atif_arg,
 171				      &buffer);
 172
 173	/* Fail only if calling the method fails and ATIF is supported */
 174	if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
 175		DRM_DEBUG_DRIVER("failed to evaluate ATIF got %s\n",
 176				 acpi_format_exception(status));
 177		kfree(buffer.pointer);
 178		return NULL;
 179	}
 180
 181	return buffer.pointer;
 182}
 183
 184/**
 185 * amdgpu_atif_parse_notification - parse supported notifications
 186 *
 187 * @n: supported notifications struct
 188 * @mask: supported notifications mask from ATIF
 189 *
 190 * Use the supported notifications mask from ATIF function
 191 * ATIF_FUNCTION_VERIFY_INTERFACE to determine what notifications
 192 * are supported (all asics).
 193 */
 194static void amdgpu_atif_parse_notification(struct amdgpu_atif_notifications *n, u32 mask)
 195{
 
 
 196	n->thermal_state = mask & ATIF_THERMAL_STATE_CHANGE_REQUEST_SUPPORTED;
 197	n->forced_power_state = mask & ATIF_FORCED_POWER_STATE_CHANGE_REQUEST_SUPPORTED;
 198	n->system_power_state = mask & ATIF_SYSTEM_POWER_SOURCE_CHANGE_REQUEST_SUPPORTED;
 
 
 199	n->brightness_change = mask & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST_SUPPORTED;
 200	n->dgpu_display_event = mask & ATIF_DGPU_DISPLAY_EVENT_SUPPORTED;
 201	n->gpu_package_power_limit = mask & ATIF_GPU_PACKAGE_POWER_LIMIT_REQUEST_SUPPORTED;
 202}
 203
 204/**
 205 * amdgpu_atif_parse_functions - parse supported functions
 206 *
 207 * @f: supported functions struct
 208 * @mask: supported functions mask from ATIF
 209 *
 210 * Use the supported functions mask from ATIF function
 211 * ATIF_FUNCTION_VERIFY_INTERFACE to determine what functions
 212 * are supported (all asics).
 213 */
 214static void amdgpu_atif_parse_functions(struct amdgpu_atif_functions *f, u32 mask)
 215{
 216	f->system_params = mask & ATIF_GET_SYSTEM_PARAMETERS_SUPPORTED;
 217	f->sbios_requests = mask & ATIF_GET_SYSTEM_BIOS_REQUESTS_SUPPORTED;
 
 
 
 
 
 
 218	f->temperature_change = mask & ATIF_TEMPERATURE_CHANGE_NOTIFICATION_SUPPORTED;
 219	f->query_backlight_transfer_characteristics =
 220		mask & ATIF_QUERY_BACKLIGHT_TRANSFER_CHARACTERISTICS_SUPPORTED;
 221	f->ready_to_undock = mask & ATIF_READY_TO_UNDOCK_NOTIFICATION_SUPPORTED;
 222	f->external_gpu_information = mask & ATIF_GET_EXTERNAL_GPU_INFORMATION_SUPPORTED;
 223}
 224
 225/**
 226 * amdgpu_atif_verify_interface - verify ATIF
 227 *
 
 228 * @atif: amdgpu atif struct
 229 *
 230 * Execute the ATIF_FUNCTION_VERIFY_INTERFACE ATIF function
 231 * to initialize ATIF and determine what features are supported
 232 * (all asics).
 233 * returns 0 on success, error on failure.
 234 */
 235static int amdgpu_atif_verify_interface(struct amdgpu_atif *atif)
 
 236{
 237	union acpi_object *info;
 238	struct atif_verify_interface output;
 239	size_t size;
 240	int err = 0;
 241
 242	info = amdgpu_atif_call(atif, ATIF_FUNCTION_VERIFY_INTERFACE, NULL);
 243	if (!info)
 244		return -EIO;
 245
 246	memset(&output, 0, sizeof(output));
 247
 248	size = *(u16 *) info->buffer.pointer;
 249	if (size < 12) {
 250		DRM_INFO("ATIF buffer is too small: %zu\n", size);
 251		err = -EINVAL;
 252		goto out;
 253	}
 254	size = min(sizeof(output), size);
 255
 256	memcpy(&output, info->buffer.pointer, size);
 257
 258	/* TODO: check version? */
 259	DRM_DEBUG_DRIVER("ATIF version %u\n", output.version);
 260
 261	amdgpu_atif_parse_notification(&atif->notifications, output.notification_mask);
 262	amdgpu_atif_parse_functions(&atif->functions, output.function_bits);
 263
 264out:
 265	kfree(info);
 266	return err;
 267}
 268
 269/**
 270 * amdgpu_atif_get_notification_params - determine notify configuration
 271 *
 272 * @atif: acpi handle
 
 273 *
 274 * Execute the ATIF_FUNCTION_GET_SYSTEM_PARAMETERS ATIF function
 275 * to determine if a notifier is used and if so which one
 276 * (all asics).  This is either Notify(VGA, 0x81) or Notify(VGA, n)
 277 * where n is specified in the result if a notifier is used.
 278 * Returns 0 on success, error on failure.
 279 */
 280static int amdgpu_atif_get_notification_params(struct amdgpu_atif *atif)
 
 281{
 282	union acpi_object *info;
 283	struct amdgpu_atif_notification_cfg *n = &atif->notification_cfg;
 284	struct atif_system_params params;
 285	size_t size;
 286	int err = 0;
 287
 288	info = amdgpu_atif_call(atif, ATIF_FUNCTION_GET_SYSTEM_PARAMETERS,
 289				NULL);
 290	if (!info) {
 291		err = -EIO;
 292		goto out;
 293	}
 294
 295	size = *(u16 *) info->buffer.pointer;
 296	if (size < 10) {
 297		err = -EINVAL;
 298		goto out;
 299	}
 300
 301	memset(&params, 0, sizeof(params));
 302	size = min(sizeof(params), size);
 303	memcpy(&params, info->buffer.pointer, size);
 304
 305	DRM_DEBUG_DRIVER("SYSTEM_PARAMS: mask = %#x, flags = %#x\n",
 306			params.flags, params.valid_mask);
 307	params.flags = params.flags & params.valid_mask;
 308
 309	if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_NONE) {
 310		n->enabled = false;
 311		n->command_code = 0;
 312	} else if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_81) {
 313		n->enabled = true;
 314		n->command_code = 0x81;
 315	} else {
 316		if (size < 11) {
 317			err = -EINVAL;
 318			goto out;
 319		}
 320		n->enabled = true;
 321		n->command_code = params.command_code;
 322	}
 323
 324out:
 325	DRM_DEBUG_DRIVER("Notification %s, command code = %#x\n",
 326			(n->enabled ? "enabled" : "disabled"),
 327			n->command_code);
 328	kfree(info);
 329	return err;
 330}
 331
 332/**
 333 * amdgpu_atif_query_backlight_caps - get min and max backlight input signal
 334 *
 335 * @atif: acpi handle
 336 *
 337 * Execute the QUERY_BRIGHTNESS_TRANSFER_CHARACTERISTICS ATIF function
 338 * to determine the acceptable range of backlight values
 339 *
 340 * Backlight_caps.caps_valid will be set to true if the query is successful
 341 *
 342 * The input signals are in range 0-255
 343 *
 344 * This function assumes the display with backlight is the first LCD
 345 *
 346 * Returns 0 on success, error on failure.
 347 */
 348static int amdgpu_atif_query_backlight_caps(struct amdgpu_atif *atif)
 349{
 350	union acpi_object *info;
 351	struct atif_qbtc_output characteristics;
 352	struct atif_qbtc_arguments arguments;
 353	struct acpi_buffer params;
 354	size_t size;
 355	int err = 0;
 356
 357	arguments.size = sizeof(arguments);
 358	arguments.requested_display = ATIF_QBTC_REQUEST_LCD1;
 359
 360	params.length = sizeof(arguments);
 361	params.pointer = (void *)&arguments;
 362
 363	info = amdgpu_atif_call(atif,
 364		ATIF_FUNCTION_QUERY_BRIGHTNESS_TRANSFER_CHARACTERISTICS,
 365		&params);
 366	if (!info) {
 367		err = -EIO;
 368		goto out;
 369	}
 370
 371	size = *(u16 *) info->buffer.pointer;
 372	if (size < 10) {
 373		err = -EINVAL;
 374		goto out;
 375	}
 376
 377	memset(&characteristics, 0, sizeof(characteristics));
 378	size = min(sizeof(characteristics), size);
 379	memcpy(&characteristics, info->buffer.pointer, size);
 380
 381	atif->backlight_caps.caps_valid = true;
 382	atif->backlight_caps.min_input_signal =
 383			characteristics.min_input_signal;
 384	atif->backlight_caps.max_input_signal =
 385			characteristics.max_input_signal;
 386out:
 387	kfree(info);
 388	return err;
 389}
 390
 391/**
 392 * amdgpu_atif_get_sbios_requests - get requested sbios event
 393 *
 394 * @atif: acpi handle
 395 * @req: atif sbios request struct
 396 *
 397 * Execute the ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS ATIF function
 398 * to determine what requests the sbios is making to the driver
 399 * (all asics).
 400 * Returns 0 on success, error on failure.
 401 */
 402static int amdgpu_atif_get_sbios_requests(struct amdgpu_atif *atif,
 403					  struct atif_sbios_requests *req)
 404{
 405	union acpi_object *info;
 406	size_t size;
 407	int count = 0;
 408
 409	info = amdgpu_atif_call(atif, ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS,
 410				NULL);
 411	if (!info)
 412		return -EIO;
 413
 414	size = *(u16 *)info->buffer.pointer;
 415	if (size < 0xd) {
 416		count = -EINVAL;
 417		goto out;
 418	}
 419	memset(req, 0, sizeof(*req));
 420
 421	size = min(sizeof(*req), size);
 422	memcpy(req, info->buffer.pointer, size);
 423	DRM_DEBUG_DRIVER("SBIOS pending requests: %#x\n", req->pending);
 424
 425	count = hweight32(req->pending);
 426
 427out:
 428	kfree(info);
 429	return count;
 430}
 431
 432/**
 433 * amdgpu_atif_handler - handle ATIF notify requests
 434 *
 435 * @adev: amdgpu_device pointer
 436 * @event: atif sbios request struct
 437 *
 438 * Checks the acpi event and if it matches an atif event,
 439 * handles it.
 440 *
 441 * Returns:
 442 * NOTIFY_BAD or NOTIFY_DONE, depending on the event.
 443 */
 444static int amdgpu_atif_handler(struct amdgpu_device *adev,
 445			       struct acpi_bus_event *event)
 446{
 447	struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif;
 
 
 448	int count;
 449
 450	DRM_DEBUG_DRIVER("event, device_class = %s, type = %#x\n",
 451			event->device_class, event->type);
 452
 453	if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
 454		return NOTIFY_DONE;
 455
 456	/* Is this actually our event? */
 457	if (!atif->notification_cfg.enabled ||
 458	    event->type != atif->notification_cfg.command_code) {
 459		/* These events will generate keypresses otherwise */
 460		if (event->type == ACPI_VIDEO_NOTIFY_PROBE)
 461			return NOTIFY_BAD;
 462		else
 463			return NOTIFY_DONE;
 464	}
 465
 466	if (atif->functions.sbios_requests) {
 467		struct atif_sbios_requests req;
 
 468
 469		/* Check pending SBIOS requests */
 470		count = amdgpu_atif_get_sbios_requests(atif, &req);
 471
 472		if (count <= 0)
 473			return NOTIFY_BAD;
 474
 475		DRM_DEBUG_DRIVER("ATIF: %d pending SBIOS requests\n", count);
 476
 477		if (req.pending & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST) {
 478			if (atif->bd) {
 479				DRM_DEBUG_DRIVER("Changing brightness to %d\n",
 480						 req.backlight_level);
 481				/*
 482				 * XXX backlight_device_set_brightness() is
 483				 * hardwired to post BACKLIGHT_UPDATE_SYSFS.
 484				 * It probably should accept 'reason' parameter.
 485				 */
 486				backlight_device_set_brightness(atif->bd, req.backlight_level);
 487			}
 488		}
 489
 490		if (req.pending & ATIF_DGPU_DISPLAY_EVENT) {
 491			if (adev->flags & AMD_IS_PX) {
 492				pm_runtime_get_sync(adev_to_drm(adev)->dev);
 493				/* Just fire off a uevent and let userspace tell us what to do */
 494				drm_helper_hpd_irq_event(adev_to_drm(adev));
 495				pm_runtime_mark_last_busy(adev_to_drm(adev)->dev);
 496				pm_runtime_put_autosuspend(adev_to_drm(adev)->dev);
 497			}
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 498		}
 499		/* TODO: check other events */
 500	}
 
 501
 502	/* We've handled the event, stop the notifier chain. The ACPI interface
 503	 * overloads ACPI_VIDEO_NOTIFY_PROBE, we don't want to send that to
 504	 * userspace if the event was generated only to signal a SBIOS
 505	 * request.
 506	 */
 507	return NOTIFY_BAD;
 508}
 509
 510/* Call the ATCS method
 511 */
 512/**
 513 * amdgpu_atcs_call - call an ATCS method
 514 *
 515 * @atcs: atcs structure
 516 * @function: the ATCS function to execute
 517 * @params: ATCS function params
 518 *
 519 * Executes the requested ATCS function (all asics).
 520 * Returns a pointer to the acpi output buffer.
 521 */
 522static union acpi_object *amdgpu_atcs_call(struct amdgpu_atcs *atcs,
 523					   int function,
 524					   struct acpi_buffer *params)
 525{
 526	acpi_status status;
 527	union acpi_object atcs_arg_elements[2];
 528	struct acpi_object_list atcs_arg;
 529	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 530
 531	atcs_arg.count = 2;
 532	atcs_arg.pointer = &atcs_arg_elements[0];
 533
 534	atcs_arg_elements[0].type = ACPI_TYPE_INTEGER;
 535	atcs_arg_elements[0].integer.value = function;
 536
 537	if (params) {
 538		atcs_arg_elements[1].type = ACPI_TYPE_BUFFER;
 539		atcs_arg_elements[1].buffer.length = params->length;
 540		atcs_arg_elements[1].buffer.pointer = params->pointer;
 541	} else {
 542		/* We need a second fake parameter */
 543		atcs_arg_elements[1].type = ACPI_TYPE_INTEGER;
 544		atcs_arg_elements[1].integer.value = 0;
 545	}
 546
 547	status = acpi_evaluate_object(atcs->handle, NULL, &atcs_arg, &buffer);
 548
 549	/* Fail only if calling the method fails and ATIF is supported */
 550	if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
 551		DRM_DEBUG_DRIVER("failed to evaluate ATCS got %s\n",
 552				 acpi_format_exception(status));
 553		kfree(buffer.pointer);
 554		return NULL;
 555	}
 556
 557	return buffer.pointer;
 558}
 559
 560/**
 561 * amdgpu_atcs_parse_functions - parse supported functions
 562 *
 563 * @f: supported functions struct
 564 * @mask: supported functions mask from ATCS
 565 *
 566 * Use the supported functions mask from ATCS function
 567 * ATCS_FUNCTION_VERIFY_INTERFACE to determine what functions
 568 * are supported (all asics).
 569 */
 570static void amdgpu_atcs_parse_functions(struct amdgpu_atcs_functions *f, u32 mask)
 571{
 572	f->get_ext_state = mask & ATCS_GET_EXTERNAL_STATE_SUPPORTED;
 573	f->pcie_perf_req = mask & ATCS_PCIE_PERFORMANCE_REQUEST_SUPPORTED;
 574	f->pcie_dev_rdy = mask & ATCS_PCIE_DEVICE_READY_NOTIFICATION_SUPPORTED;
 575	f->pcie_bus_width = mask & ATCS_SET_PCIE_BUS_WIDTH_SUPPORTED;
 576	f->power_shift_control = mask & ATCS_SET_POWER_SHIFT_CONTROL_SUPPORTED;
 577}
 578
 579/**
 580 * amdgpu_atcs_verify_interface - verify ATCS
 581 *
 
 582 * @atcs: amdgpu atcs struct
 583 *
 584 * Execute the ATCS_FUNCTION_VERIFY_INTERFACE ATCS function
 585 * to initialize ATCS and determine what features are supported
 586 * (all asics).
 587 * returns 0 on success, error on failure.
 588 */
 589static int amdgpu_atcs_verify_interface(struct amdgpu_atcs *atcs)
 
 590{
 591	union acpi_object *info;
 592	struct atcs_verify_interface output;
 593	size_t size;
 594	int err = 0;
 595
 596	info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_VERIFY_INTERFACE, NULL);
 597	if (!info)
 598		return -EIO;
 599
 600	memset(&output, 0, sizeof(output));
 601
 602	size = *(u16 *) info->buffer.pointer;
 603	if (size < 8) {
 604		DRM_INFO("ATCS buffer is too small: %zu\n", size);
 605		err = -EINVAL;
 606		goto out;
 607	}
 608	size = min(sizeof(output), size);
 609
 610	memcpy(&output, info->buffer.pointer, size);
 611
 612	/* TODO: check version? */
 613	DRM_DEBUG_DRIVER("ATCS version %u\n", output.version);
 614
 615	amdgpu_atcs_parse_functions(&atcs->functions, output.function_bits);
 616
 617out:
 618	kfree(info);
 619	return err;
 620}
 621
 622/**
 623 * amdgpu_acpi_is_pcie_performance_request_supported
 624 *
 625 * @adev: amdgpu_device pointer
 626 *
 627 * Check if the ATCS pcie_perf_req and pcie_dev_rdy methods
 628 * are supported (all asics).
 629 * returns true if supported, false if not.
 630 */
 631bool amdgpu_acpi_is_pcie_performance_request_supported(struct amdgpu_device *adev)
 632{
 633	struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
 634
 635	if (atcs->functions.pcie_perf_req && atcs->functions.pcie_dev_rdy)
 636		return true;
 637
 638	return false;
 639}
 640
 641/**
 642 * amdgpu_acpi_is_power_shift_control_supported
 643 *
 644 * Check if the ATCS power shift control method
 645 * is supported.
 646 * returns true if supported, false if not.
 647 */
 648bool amdgpu_acpi_is_power_shift_control_supported(void)
 649{
 650	return amdgpu_acpi_priv.atcs.functions.power_shift_control;
 651}
 652
 653/**
 654 * amdgpu_acpi_pcie_notify_device_ready
 655 *
 656 * @adev: amdgpu_device pointer
 657 *
 658 * Executes the PCIE_DEVICE_READY_NOTIFICATION method
 659 * (all asics).
 660 * returns 0 on success, error on failure.
 661 */
 662int amdgpu_acpi_pcie_notify_device_ready(struct amdgpu_device *adev)
 663{
 
 664	union acpi_object *info;
 665	struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
 
 
 
 
 
 666
 667	if (!atcs->functions.pcie_dev_rdy)
 668		return -EINVAL;
 669
 670	info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_PCIE_DEVICE_READY_NOTIFICATION, NULL);
 671	if (!info)
 672		return -EIO;
 673
 674	kfree(info);
 675
 676	return 0;
 677}
 678
 679/**
 680 * amdgpu_acpi_pcie_performance_request
 681 *
 682 * @adev: amdgpu_device pointer
 683 * @perf_req: requested perf level (pcie gen speed)
 684 * @advertise: set advertise caps flag if set
 685 *
 686 * Executes the PCIE_PERFORMANCE_REQUEST method to
 687 * change the pcie gen speed (all asics).
 688 * returns 0 on success, error on failure.
 689 */
 690int amdgpu_acpi_pcie_performance_request(struct amdgpu_device *adev,
 691					 u8 perf_req, bool advertise)
 692{
 
 693	union acpi_object *info;
 694	struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
 695	struct atcs_pref_req_input atcs_input;
 696	struct atcs_pref_req_output atcs_output;
 697	struct acpi_buffer params;
 698	size_t size;
 699	u32 retry = 3;
 700
 701	if (amdgpu_acpi_pcie_notify_device_ready(adev))
 702		return -EINVAL;
 703
 
 
 
 
 
 704	if (!atcs->functions.pcie_perf_req)
 705		return -EINVAL;
 706
 707	atcs_input.size = sizeof(struct atcs_pref_req_input);
 708	/* client id (bit 2-0: func num, 7-3: dev num, 15-8: bus num) */
 709	atcs_input.client_id = pci_dev_id(adev->pdev);
 710	atcs_input.valid_flags_mask = ATCS_VALID_FLAGS_MASK;
 711	atcs_input.flags = ATCS_WAIT_FOR_COMPLETION;
 712	if (advertise)
 713		atcs_input.flags |= ATCS_ADVERTISE_CAPS;
 714	atcs_input.req_type = ATCS_PCIE_LINK_SPEED;
 715	atcs_input.perf_req = perf_req;
 716
 717	params.length = sizeof(struct atcs_pref_req_input);
 718	params.pointer = &atcs_input;
 719
 720	while (retry--) {
 721		info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_PCIE_PERFORMANCE_REQUEST, &params);
 722		if (!info)
 723			return -EIO;
 724
 725		memset(&atcs_output, 0, sizeof(atcs_output));
 726
 727		size = *(u16 *) info->buffer.pointer;
 728		if (size < 3) {
 729			DRM_INFO("ATCS buffer is too small: %zu\n", size);
 730			kfree(info);
 731			return -EINVAL;
 732		}
 733		size = min(sizeof(atcs_output), size);
 734
 735		memcpy(&atcs_output, info->buffer.pointer, size);
 736
 737		kfree(info);
 738
 739		switch (atcs_output.ret_val) {
 740		case ATCS_REQUEST_REFUSED:
 741		default:
 742			return -EINVAL;
 743		case ATCS_REQUEST_COMPLETE:
 744			return 0;
 745		case ATCS_REQUEST_IN_PROGRESS:
 746			udelay(10);
 747			break;
 748		}
 749	}
 750
 751	return 0;
 752}
 753
 754/**
 755 * amdgpu_acpi_power_shift_control
 756 *
 757 * @adev: amdgpu_device pointer
 758 * @dev_state: device acpi state
 759 * @drv_state: driver state
 760 *
 761 * Executes the POWER_SHIFT_CONTROL method to
 762 * communicate current dGPU device state and
 763 * driver state to APU/SBIOS.
 764 * returns 0 on success, error on failure.
 765 */
 766int amdgpu_acpi_power_shift_control(struct amdgpu_device *adev,
 767				    u8 dev_state, bool drv_state)
 768{
 769	union acpi_object *info;
 770	struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
 771	struct atcs_pwr_shift_input atcs_input;
 772	struct acpi_buffer params;
 773
 774	if (!amdgpu_acpi_is_power_shift_control_supported())
 775		return -EINVAL;
 776
 777	atcs_input.size = sizeof(struct atcs_pwr_shift_input);
 778	/* dGPU id (bit 2-0: func num, 7-3: dev num, 15-8: bus num) */
 779	atcs_input.dgpu_id = pci_dev_id(adev->pdev);
 780	atcs_input.dev_acpi_state = dev_state;
 781	atcs_input.drv_state = drv_state;
 782
 783	params.length = sizeof(struct atcs_pwr_shift_input);
 784	params.pointer = &atcs_input;
 785
 786	info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_POWER_SHIFT_CONTROL, &params);
 787	if (!info) {
 788		DRM_ERROR("ATCS PSC update failed\n");
 789		return -EIO;
 790	}
 791
 792	return 0;
 793}
 794
 795/**
 796 * amdgpu_acpi_smart_shift_update - update dGPU device state to SBIOS
 797 *
 798 * @dev: drm_device pointer
 799 * @ss_state: current smart shift event
 800 *
 801 * returns 0 on success,
 802 * otherwise return error number.
 803 */
 804int amdgpu_acpi_smart_shift_update(struct drm_device *dev, enum amdgpu_ss ss_state)
 805{
 806	struct amdgpu_device *adev = drm_to_adev(dev);
 807	int r;
 808
 809	if (!amdgpu_device_supports_smart_shift(dev))
 810		return 0;
 811
 812	switch (ss_state) {
 813	/* SBIOS trigger “stop”, “enable” and “start” at D0, Driver Operational.
 814	 * SBIOS trigger “stop” at D3, Driver Not Operational.
 815	 * SBIOS trigger “stop” and “disable” at D0, Driver NOT operational.
 816	 */
 817	case AMDGPU_SS_DRV_LOAD:
 818		r = amdgpu_acpi_power_shift_control(adev,
 819						    AMDGPU_ATCS_PSC_DEV_STATE_D0,
 820						    AMDGPU_ATCS_PSC_DRV_STATE_OPR);
 821		break;
 822	case AMDGPU_SS_DEV_D0:
 823		r = amdgpu_acpi_power_shift_control(adev,
 824						    AMDGPU_ATCS_PSC_DEV_STATE_D0,
 825						    AMDGPU_ATCS_PSC_DRV_STATE_OPR);
 826		break;
 827	case AMDGPU_SS_DEV_D3:
 828		r = amdgpu_acpi_power_shift_control(adev,
 829						    AMDGPU_ATCS_PSC_DEV_STATE_D3_HOT,
 830						    AMDGPU_ATCS_PSC_DRV_STATE_NOT_OPR);
 831		break;
 832	case AMDGPU_SS_DRV_UNLOAD:
 833		r = amdgpu_acpi_power_shift_control(adev,
 834						    AMDGPU_ATCS_PSC_DEV_STATE_D0,
 835						    AMDGPU_ATCS_PSC_DRV_STATE_NOT_OPR);
 836		break;
 837	default:
 838		return -EINVAL;
 839	}
 840
 841	return r;
 842}
 843
 844#ifdef CONFIG_ACPI_NUMA
 845static inline uint64_t amdgpu_acpi_get_numa_size(int nid)
 846{
 847	/* This is directly using si_meminfo_node implementation as the
 848	 * function is not exported.
 849	 */
 850	int zone_type;
 851	uint64_t managed_pages = 0;
 852
 853	pg_data_t *pgdat = NODE_DATA(nid);
 854
 855	for (zone_type = 0; zone_type < MAX_NR_ZONES; zone_type++)
 856		managed_pages +=
 857			zone_managed_pages(&pgdat->node_zones[zone_type]);
 858	return managed_pages * PAGE_SIZE;
 859}
 860
 861static struct amdgpu_numa_info *amdgpu_acpi_get_numa_info(uint32_t pxm)
 862{
 863	struct amdgpu_numa_info *numa_info;
 864	int nid;
 865
 866	numa_info = xa_load(&numa_info_xa, pxm);
 867
 868	if (!numa_info) {
 869		struct sysinfo info;
 870
 871		numa_info = kzalloc(sizeof(*numa_info), GFP_KERNEL);
 872		if (!numa_info)
 873			return NULL;
 874
 875		nid = pxm_to_node(pxm);
 876		numa_info->pxm = pxm;
 877		numa_info->nid = nid;
 878
 879		if (numa_info->nid == NUMA_NO_NODE) {
 880			si_meminfo(&info);
 881			numa_info->size = info.totalram * info.mem_unit;
 882		} else {
 883			numa_info->size = amdgpu_acpi_get_numa_size(nid);
 884		}
 885		xa_store(&numa_info_xa, numa_info->pxm, numa_info, GFP_KERNEL);
 886	}
 887
 888	return numa_info;
 889}
 890#endif
 891
 892/**
 893 * amdgpu_acpi_get_node_id - obtain the NUMA node id for corresponding amdgpu
 894 * acpi device handle
 895 *
 896 * @handle: acpi handle
 897 * @numa_info: amdgpu_numa_info structure holding numa information
 898 *
 899 * Queries the ACPI interface to fetch the corresponding NUMA Node ID for a
 900 * given amdgpu acpi device.
 901 *
 902 * Returns ACPI STATUS OK with Node ID on success or the corresponding failure reason
 903 */
 904static acpi_status amdgpu_acpi_get_node_id(acpi_handle handle,
 905				    struct amdgpu_numa_info **numa_info)
 906{
 907#ifdef CONFIG_ACPI_NUMA
 908	u64 pxm;
 909	acpi_status status;
 910
 911	if (!numa_info)
 912		return_ACPI_STATUS(AE_ERROR);
 913
 914	status = acpi_evaluate_integer(handle, "_PXM", NULL, &pxm);
 915
 916	if (ACPI_FAILURE(status))
 917		return status;
 918
 919	*numa_info = amdgpu_acpi_get_numa_info(pxm);
 920
 921	if (!*numa_info)
 922		return_ACPI_STATUS(AE_ERROR);
 923
 924	return_ACPI_STATUS(AE_OK);
 925#else
 926	return_ACPI_STATUS(AE_NOT_EXIST);
 927#endif
 928}
 929
 930static struct amdgpu_acpi_dev_info *amdgpu_acpi_get_dev(u32 sbdf)
 931{
 932	struct amdgpu_acpi_dev_info *acpi_dev;
 933
 934	if (list_empty(&amdgpu_acpi_dev_list))
 935		return NULL;
 936
 937	list_for_each_entry(acpi_dev, &amdgpu_acpi_dev_list, list)
 938		if (acpi_dev->sbdf == sbdf)
 939			return acpi_dev;
 940
 941	return NULL;
 942}
 943
 944static int amdgpu_acpi_dev_init(struct amdgpu_acpi_dev_info **dev_info,
 945				struct amdgpu_acpi_xcc_info *xcc_info, u32 sbdf)
 946{
 947	struct amdgpu_acpi_dev_info *tmp;
 948	union acpi_object *obj;
 949	int ret = -ENOENT;
 950
 951	*dev_info = NULL;
 952	tmp = kzalloc(sizeof(struct amdgpu_acpi_dev_info), GFP_KERNEL);
 953	if (!tmp)
 954		return -ENOMEM;
 955
 956	INIT_LIST_HEAD(&tmp->xcc_list);
 957	INIT_LIST_HEAD(&tmp->list);
 958	tmp->sbdf = sbdf;
 959
 960	obj = acpi_evaluate_dsm_typed(xcc_info->handle, &amd_xcc_dsm_guid, 0,
 961				      AMD_XCC_DSM_GET_SUPP_MODE, NULL,
 962				      ACPI_TYPE_INTEGER);
 963
 964	if (!obj) {
 965		acpi_handle_debug(xcc_info->handle,
 966				  "_DSM function %d evaluation failed",
 967				  AMD_XCC_DSM_GET_SUPP_MODE);
 968		ret = -ENOENT;
 969		goto out;
 970	}
 971
 972	tmp->supp_xcp_mode = obj->integer.value & 0xFFFF;
 973	ACPI_FREE(obj);
 974
 975	obj = acpi_evaluate_dsm_typed(xcc_info->handle, &amd_xcc_dsm_guid, 0,
 976				      AMD_XCC_DSM_GET_XCP_MODE, NULL,
 977				      ACPI_TYPE_INTEGER);
 978
 979	if (!obj) {
 980		acpi_handle_debug(xcc_info->handle,
 981				  "_DSM function %d evaluation failed",
 982				  AMD_XCC_DSM_GET_XCP_MODE);
 983		ret = -ENOENT;
 984		goto out;
 985	}
 986
 987	tmp->xcp_mode = obj->integer.value & 0xFFFF;
 988	tmp->mem_mode = (obj->integer.value >> 32) & 0xFFFF;
 989	ACPI_FREE(obj);
 990
 991	/* Evaluate DSMs and fill XCC information */
 992	obj = acpi_evaluate_dsm_typed(xcc_info->handle, &amd_xcc_dsm_guid, 0,
 993				      AMD_XCC_DSM_GET_TMR_INFO, NULL,
 994				      ACPI_TYPE_PACKAGE);
 995
 996	if (!obj || obj->package.count < 2) {
 997		acpi_handle_debug(xcc_info->handle,
 998				  "_DSM function %d evaluation failed",
 999				  AMD_XCC_DSM_GET_TMR_INFO);
1000		ret = -ENOENT;
1001		goto out;
1002	}
1003
1004	tmp->tmr_base = obj->package.elements[0].integer.value;
1005	tmp->tmr_size = obj->package.elements[1].integer.value;
1006	ACPI_FREE(obj);
1007
1008	DRM_DEBUG_DRIVER(
1009		"New dev(%x): Supported xcp mode: %x curr xcp_mode : %x mem mode : %x, tmr base: %llx tmr size: %llx  ",
1010		tmp->sbdf, tmp->supp_xcp_mode, tmp->xcp_mode, tmp->mem_mode,
1011		tmp->tmr_base, tmp->tmr_size);
1012	list_add_tail(&tmp->list, &amdgpu_acpi_dev_list);
1013	*dev_info = tmp;
1014
1015	return 0;
1016
1017out:
1018	if (obj)
1019		ACPI_FREE(obj);
1020	kfree(tmp);
1021
1022	return ret;
1023}
1024
1025static int amdgpu_acpi_get_xcc_info(struct amdgpu_acpi_xcc_info *xcc_info,
1026				    u32 *sbdf)
1027{
1028	union acpi_object *obj;
1029	acpi_status status;
1030	int ret = -ENOENT;
1031
1032	obj = acpi_evaluate_dsm_typed(xcc_info->handle, &amd_xcc_dsm_guid, 0,
1033				      AMD_XCC_DSM_GET_NUM_FUNCS, NULL,
1034				      ACPI_TYPE_INTEGER);
1035
1036	if (!obj || obj->integer.value != AMD_XCC_DSM_NUM_FUNCS)
1037		goto out;
1038	ACPI_FREE(obj);
1039
1040	/* Evaluate DSMs and fill XCC information */
1041	obj = acpi_evaluate_dsm_typed(xcc_info->handle, &amd_xcc_dsm_guid, 0,
1042				      AMD_XCC_DSM_GET_VF_XCC_MAPPING, NULL,
1043				      ACPI_TYPE_INTEGER);
1044
1045	if (!obj) {
1046		acpi_handle_debug(xcc_info->handle,
1047				  "_DSM function %d evaluation failed",
1048				  AMD_XCC_DSM_GET_VF_XCC_MAPPING);
1049		ret = -EINVAL;
1050		goto out;
1051	}
1052
1053	/* PF xcc id [39:32] */
1054	xcc_info->phy_id = (obj->integer.value >> 32) & 0xFF;
1055	/* xcp node of this xcc [47:40] */
1056	xcc_info->xcp_node = (obj->integer.value >> 40) & 0xFF;
1057	/* PF domain of this xcc [31:16] */
1058	*sbdf = (obj->integer.value) & 0xFFFF0000;
1059	/* PF bus/dev/fn of this xcc [63:48] */
1060	*sbdf |= (obj->integer.value >> 48) & 0xFFFF;
1061	ACPI_FREE(obj);
1062	obj = NULL;
1063
1064	status =
1065		amdgpu_acpi_get_node_id(xcc_info->handle, &xcc_info->numa_info);
1066
1067	/* TODO: check if this check is required */
1068	if (ACPI_SUCCESS(status))
1069		ret = 0;
1070out:
1071	if (obj)
1072		ACPI_FREE(obj);
1073
1074	return ret;
1075}
1076
1077static int amdgpu_acpi_enumerate_xcc(void)
1078{
1079	struct amdgpu_acpi_dev_info *dev_info = NULL;
1080	struct amdgpu_acpi_xcc_info *xcc_info;
1081	struct acpi_device *acpi_dev;
1082	char hid[ACPI_ID_LEN];
1083	int ret, id;
1084	u32 sbdf;
1085
1086	INIT_LIST_HEAD(&amdgpu_acpi_dev_list);
1087	xa_init(&numa_info_xa);
1088
1089	for (id = 0; id < AMD_XCC_MAX_HID; id++) {
1090		sprintf(hid, "%s%d", "AMD", AMD_XCC_HID_START + id);
1091		acpi_dev = acpi_dev_get_first_match_dev(hid, NULL, -1);
1092		/* These ACPI objects are expected to be in sequential order. If
1093		 * one is not found, no need to check the rest.
1094		 */
1095		if (!acpi_dev) {
1096			DRM_DEBUG_DRIVER("No matching acpi device found for %s",
1097					 hid);
1098			break;
1099		}
1100
1101		xcc_info = kzalloc(sizeof(struct amdgpu_acpi_xcc_info),
1102				   GFP_KERNEL);
1103		if (!xcc_info) {
1104			DRM_ERROR("Failed to allocate memory for xcc info\n");
1105			return -ENOMEM;
1106		}
1107
1108		INIT_LIST_HEAD(&xcc_info->list);
1109		xcc_info->handle = acpi_device_handle(acpi_dev);
1110		acpi_dev_put(acpi_dev);
1111
1112		ret = amdgpu_acpi_get_xcc_info(xcc_info, &sbdf);
1113		if (ret) {
1114			kfree(xcc_info);
1115			continue;
1116		}
1117
1118		dev_info = amdgpu_acpi_get_dev(sbdf);
1119
1120		if (!dev_info)
1121			ret = amdgpu_acpi_dev_init(&dev_info, xcc_info, sbdf);
1122
1123		if (ret == -ENOMEM)
1124			return ret;
1125
1126		if (!dev_info) {
1127			kfree(xcc_info);
1128			continue;
1129		}
1130
1131		list_add_tail(&xcc_info->list, &dev_info->xcc_list);
1132	}
1133
1134	return 0;
1135}
1136
1137int amdgpu_acpi_get_tmr_info(struct amdgpu_device *adev, u64 *tmr_offset,
1138			     u64 *tmr_size)
1139{
1140	struct amdgpu_acpi_dev_info *dev_info;
1141	u32 sbdf;
1142
1143	if (!tmr_offset || !tmr_size)
1144		return -EINVAL;
1145
1146	sbdf = (pci_domain_nr(adev->pdev->bus) << 16);
1147	sbdf |= pci_dev_id(adev->pdev);
1148	dev_info = amdgpu_acpi_get_dev(sbdf);
1149	if (!dev_info)
1150		return -ENOENT;
1151
1152	*tmr_offset = dev_info->tmr_base;
1153	*tmr_size = dev_info->tmr_size;
1154
1155	return 0;
1156}
1157
1158int amdgpu_acpi_get_mem_info(struct amdgpu_device *adev, int xcc_id,
1159			     struct amdgpu_numa_info *numa_info)
1160{
1161	struct amdgpu_acpi_dev_info *dev_info;
1162	struct amdgpu_acpi_xcc_info *xcc_info;
1163	u32 sbdf;
1164
1165	if (!numa_info)
1166		return -EINVAL;
1167
1168	sbdf = (pci_domain_nr(adev->pdev->bus) << 16);
1169	sbdf |= pci_dev_id(adev->pdev);
1170	dev_info = amdgpu_acpi_get_dev(sbdf);
1171	if (!dev_info)
1172		return -ENOENT;
1173
1174	list_for_each_entry(xcc_info, &dev_info->xcc_list, list) {
1175		if (xcc_info->phy_id == xcc_id) {
1176			memcpy(numa_info, xcc_info->numa_info,
1177			       sizeof(*numa_info));
1178			return 0;
1179		}
1180	}
1181
1182	return -ENOENT;
1183}
1184
1185/**
1186 * amdgpu_acpi_event - handle notify events
1187 *
1188 * @nb: notifier block
1189 * @val: val
1190 * @data: acpi event
1191 *
1192 * Calls relevant amdgpu functions in response to various
1193 * acpi events.
1194 * Returns NOTIFY code
1195 */
1196static int amdgpu_acpi_event(struct notifier_block *nb,
1197			     unsigned long val,
1198			     void *data)
1199{
1200	struct amdgpu_device *adev = container_of(nb, struct amdgpu_device, acpi_nb);
1201	struct acpi_bus_event *entry = (struct acpi_bus_event *)data;
1202
1203	if (strcmp(entry->device_class, ACPI_AC_CLASS) == 0) {
1204		if (power_supply_is_system_supplied() > 0)
1205			DRM_DEBUG_DRIVER("pm: AC\n");
1206		else
1207			DRM_DEBUG_DRIVER("pm: DC\n");
1208
1209		amdgpu_pm_acpi_event_handler(adev);
1210	}
1211
1212	/* Check for pending SBIOS requests */
1213	return amdgpu_atif_handler(adev, entry);
1214}
1215
1216/* Call all ACPI methods here */
1217/**
1218 * amdgpu_acpi_init - init driver acpi support
1219 *
1220 * @adev: amdgpu_device pointer
1221 *
1222 * Verifies the AMD ACPI interfaces and registers with the acpi
1223 * notifier chain (all asics).
1224 * Returns 0 on success, error on failure.
1225 */
1226int amdgpu_acpi_init(struct amdgpu_device *adev)
1227{
1228	struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif;
1229
1230	if (atif->notifications.brightness_change) {
1231		if (adev->dc_enabled) {
1232#if defined(CONFIG_DRM_AMD_DC)
1233			struct amdgpu_display_manager *dm = &adev->dm;
1234
1235			if (dm->backlight_dev[0])
1236				atif->bd = dm->backlight_dev[0];
1237#endif
1238		} else {
1239			struct drm_encoder *tmp;
1240
1241			/* Find the encoder controlling the brightness */
1242			list_for_each_entry(tmp, &adev_to_drm(adev)->mode_config.encoder_list,
1243					    head) {
1244				struct amdgpu_encoder *enc = to_amdgpu_encoder(tmp);
1245
1246				if ((enc->devices & (ATOM_DEVICE_LCD_SUPPORT)) &&
1247				    enc->enc_priv) {
1248					struct amdgpu_encoder_atom_dig *dig = enc->enc_priv;
1249
1250					if (dig->bl_dev) {
1251						atif->bd = dig->bl_dev;
1252						break;
1253					}
1254				}
1255			}
1256		}
1257	}
1258	adev->acpi_nb.notifier_call = amdgpu_acpi_event;
1259	register_acpi_notifier(&adev->acpi_nb);
1260
1261	return 0;
1262}
1263
1264void amdgpu_acpi_get_backlight_caps(struct amdgpu_dm_backlight_caps *caps)
1265{
1266	struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif;
1267
1268	caps->caps_valid = atif->backlight_caps.caps_valid;
1269	caps->min_input_signal = atif->backlight_caps.min_input_signal;
1270	caps->max_input_signal = atif->backlight_caps.max_input_signal;
1271}
1272
1273/**
1274 * amdgpu_acpi_fini - tear down driver acpi support
1275 *
1276 * @adev: amdgpu_device pointer
1277 *
1278 * Unregisters with the acpi notifier chain (all asics).
1279 */
1280void amdgpu_acpi_fini(struct amdgpu_device *adev)
1281{
1282	unregister_acpi_notifier(&adev->acpi_nb);
1283}
1284
1285/**
1286 * amdgpu_atif_pci_probe_handle - look up the ATIF handle
1287 *
1288 * @pdev: pci device
1289 *
1290 * Look up the ATIF handles (all asics).
1291 * Returns true if the handle is found, false if not.
1292 */
1293static bool amdgpu_atif_pci_probe_handle(struct pci_dev *pdev)
1294{
1295	char acpi_method_name[255] = { 0 };
1296	struct acpi_buffer buffer = {sizeof(acpi_method_name), acpi_method_name};
1297	acpi_handle dhandle, atif_handle;
1298	acpi_status status;
1299	int ret;
1300
1301	dhandle = ACPI_HANDLE(&pdev->dev);
1302	if (!dhandle)
1303		return false;
1304
1305	status = acpi_get_handle(dhandle, "ATIF", &atif_handle);
1306	if (ACPI_FAILURE(status))
1307		return false;
1308
1309	amdgpu_acpi_priv.atif.handle = atif_handle;
1310	acpi_get_name(amdgpu_acpi_priv.atif.handle, ACPI_FULL_PATHNAME, &buffer);
1311	DRM_DEBUG_DRIVER("Found ATIF handle %s\n", acpi_method_name);
1312	ret = amdgpu_atif_verify_interface(&amdgpu_acpi_priv.atif);
1313	if (ret) {
1314		amdgpu_acpi_priv.atif.handle = 0;
1315		return false;
1316	}
1317	return true;
1318}
1319
1320/**
1321 * amdgpu_atcs_pci_probe_handle - look up the ATCS handle
1322 *
1323 * @pdev: pci device
1324 *
1325 * Look up the ATCS handles (all asics).
1326 * Returns true if the handle is found, false if not.
1327 */
1328static bool amdgpu_atcs_pci_probe_handle(struct pci_dev *pdev)
1329{
1330	char acpi_method_name[255] = { 0 };
1331	struct acpi_buffer buffer = { sizeof(acpi_method_name), acpi_method_name };
1332	acpi_handle dhandle, atcs_handle;
1333	acpi_status status;
1334	int ret;
1335
1336	dhandle = ACPI_HANDLE(&pdev->dev);
1337	if (!dhandle)
1338		return false;
1339
1340	status = acpi_get_handle(dhandle, "ATCS", &atcs_handle);
1341	if (ACPI_FAILURE(status))
1342		return false;
1343
1344	amdgpu_acpi_priv.atcs.handle = atcs_handle;
1345	acpi_get_name(amdgpu_acpi_priv.atcs.handle, ACPI_FULL_PATHNAME, &buffer);
1346	DRM_DEBUG_DRIVER("Found ATCS handle %s\n", acpi_method_name);
1347	ret = amdgpu_atcs_verify_interface(&amdgpu_acpi_priv.atcs);
1348	if (ret) {
1349		amdgpu_acpi_priv.atcs.handle = 0;
1350		return false;
1351	}
1352	return true;
1353}
1354
 
 
1355
1356/**
1357 * amdgpu_acpi_should_gpu_reset
1358 *
1359 * @adev: amdgpu_device_pointer
1360 *
1361 * returns true if should reset GPU, false if not
1362 */
1363bool amdgpu_acpi_should_gpu_reset(struct amdgpu_device *adev)
1364{
1365	if ((adev->flags & AMD_IS_APU) &&
1366	    adev->gfx.imu.funcs) /* Not need to do mode2 reset for IMU enabled APUs */
1367		return false;
1368
1369	if ((adev->flags & AMD_IS_APU) &&
1370	    amdgpu_acpi_is_s3_active(adev))
1371		return false;
1372
1373	if (amdgpu_sriov_vf(adev))
1374		return false;
1375
1376#if IS_ENABLED(CONFIG_SUSPEND)
1377	return pm_suspend_target_state != PM_SUSPEND_TO_IDLE;
1378#else
1379	return true;
1380#endif
1381}
1382
1383/*
1384 * amdgpu_acpi_detect - detect ACPI ATIF/ATCS methods
1385 *
1386 * Check if we have the ATIF/ATCS methods and populate
1387 * the structures in the driver.
1388 */
1389void amdgpu_acpi_detect(void)
1390{
1391	struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif;
1392	struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
1393	struct pci_dev *pdev = NULL;
1394	int ret;
1395
1396	while ((pdev = pci_get_base_class(PCI_BASE_CLASS_DISPLAY, pdev))) {
1397		if ((pdev->class != PCI_CLASS_DISPLAY_VGA << 8) &&
1398		    (pdev->class != PCI_CLASS_DISPLAY_OTHER << 8))
1399			continue;
1400
1401		if (!atif->handle)
1402			amdgpu_atif_pci_probe_handle(pdev);
1403		if (!atcs->handle)
1404			amdgpu_atcs_pci_probe_handle(pdev);
1405	}
1406
1407	if (atif->functions.sbios_requests && !atif->functions.system_params) {
1408		/* XXX check this workraround, if sbios request function is
1409		 * present we have to see how it's configured in the system
1410		 * params
1411		 */
1412		atif->functions.system_params = true;
1413	}
1414
1415	if (atif->functions.system_params) {
1416		ret = amdgpu_atif_get_notification_params(atif);
 
1417		if (ret) {
1418			DRM_DEBUG_DRIVER("Call to GET_SYSTEM_PARAMS failed: %d\n",
1419					ret);
1420			/* Disable notification */
1421			atif->notification_cfg.enabled = false;
1422		}
1423	}
1424
1425	if (atif->functions.query_backlight_transfer_characteristics) {
1426		ret = amdgpu_atif_query_backlight_caps(atif);
1427		if (ret) {
1428			DRM_DEBUG_DRIVER("Call to QUERY_BACKLIGHT_TRANSFER_CHARACTERISTICS failed: %d\n",
1429					ret);
1430			atif->backlight_caps.caps_valid = false;
1431		}
1432	} else {
1433		atif->backlight_caps.caps_valid = false;
1434	}
1435
1436	amdgpu_acpi_enumerate_xcc();
1437}
1438
1439void amdgpu_acpi_release(void)
1440{
1441	struct amdgpu_acpi_dev_info *dev_info, *dev_tmp;
1442	struct amdgpu_acpi_xcc_info *xcc_info, *xcc_tmp;
1443	struct amdgpu_numa_info *numa_info;
1444	unsigned long index;
1445
1446	xa_for_each(&numa_info_xa, index, numa_info) {
1447		kfree(numa_info);
1448		xa_erase(&numa_info_xa, index);
1449	}
1450
1451	if (list_empty(&amdgpu_acpi_dev_list))
1452		return;
1453
1454	list_for_each_entry_safe(dev_info, dev_tmp, &amdgpu_acpi_dev_list,
1455				 list) {
1456		list_for_each_entry_safe(xcc_info, xcc_tmp, &dev_info->xcc_list,
1457					 list) {
1458			list_del(&xcc_info->list);
1459			kfree(xcc_info);
1460		}
1461
1462		list_del(&dev_info->list);
1463		kfree(dev_info);
1464	}
1465}
1466
1467#if IS_ENABLED(CONFIG_SUSPEND)
1468/**
1469 * amdgpu_acpi_is_s3_active
1470 *
1471 * @adev: amdgpu_device_pointer
1472 *
1473 * returns true if supported, false if not.
1474 */
1475bool amdgpu_acpi_is_s3_active(struct amdgpu_device *adev)
1476{
1477	return !(adev->flags & AMD_IS_APU) ||
1478		(pm_suspend_target_state == PM_SUSPEND_MEM);
1479}
1480
1481/**
1482 * amdgpu_acpi_is_s0ix_active
1483 *
1484 * @adev: amdgpu_device_pointer
1485 *
1486 * returns true if supported, false if not.
1487 */
1488bool amdgpu_acpi_is_s0ix_active(struct amdgpu_device *adev)
1489{
1490	if (!(adev->flags & AMD_IS_APU) ||
1491	    (pm_suspend_target_state != PM_SUSPEND_TO_IDLE))
1492		return false;
1493
1494	if (adev->asic_type < CHIP_RAVEN)
1495		return false;
1496
1497	if (!(adev->pm.pp_feature & PP_GFXOFF_MASK))
1498		return false;
1499
1500	/*
1501	 * If ACPI_FADT_LOW_POWER_S0 is not set in the FADT, it is generally
1502	 * risky to do any special firmware-related preparations for entering
1503	 * S0ix even though the system is suspending to idle, so return false
1504	 * in that case.
1505	 */
1506	if (!(acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0)) {
1507		dev_err_once(adev->dev,
1508			      "Power consumption will be higher as BIOS has not been configured for suspend-to-idle.\n"
1509			      "To use suspend-to-idle change the sleep mode in BIOS setup.\n");
1510		return false;
1511	}
1512
1513#if !IS_ENABLED(CONFIG_AMD_PMC)
1514	dev_err_once(adev->dev,
1515		      "Power consumption will be higher as the kernel has not been compiled with CONFIG_AMD_PMC.\n");
1516	return false;
1517#else
1518	return true;
1519#endif /* CONFIG_AMD_PMC */
1520}
1521
1522/**
1523 * amdgpu_choose_low_power_state
1524 *
1525 * @adev: amdgpu_device_pointer
1526 *
1527 * Choose the target low power state for the GPU
1528 */
1529void amdgpu_choose_low_power_state(struct amdgpu_device *adev)
1530{
1531	if (adev->in_runpm)
1532		return;
1533
1534	if (amdgpu_acpi_is_s0ix_active(adev))
1535		adev->in_s0ix = true;
1536	else if (amdgpu_acpi_is_s3_active(adev))
1537		adev->in_s3 = true;
1538}
1539
1540#endif /* CONFIG_SUSPEND */