path: root/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c

// SPDX-License-Identifier: MIT
/*
 * Copyright 2012 Advanced Micro Devices, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 */

#include <linux/pci.h>
#include <linux/acpi.h>
#include <linux/backlight.h>
#include <linux/slab.h>
#include <linux/xarray.h>
#include <linux/power_supply.h>
#include <linux/pm_runtime.h>
#include <linux/suspend.h>
#include <acpi/video.h>
#include <acpi/actbl.h>

#include "amdgpu.h"
#include "amdgpu_pm.h"
#include "amdgpu_display.h"
#include "amd_acpi.h"
#include "atom.h"

/* Declare GUID for AMD _DSM method for XCCs */
static const guid_t amd_xcc_dsm_guid = GUID_INIT(0x8267f5d5, 0xa556, 0x44f2,
						 0xb8, 0xb4, 0x45, 0x56, 0x2e,
						 0x8c, 0x5b, 0xec);

#define AMD_XCC_HID_START 3000
#define AMD_XCC_DSM_GET_NUM_FUNCS 0
#define AMD_XCC_DSM_GET_SUPP_MODE 1
#define AMD_XCC_DSM_GET_XCP_MODE 2
#define AMD_XCC_DSM_GET_VF_XCC_MAPPING 4
#define AMD_XCC_DSM_GET_TMR_INFO 5
#define AMD_XCC_DSM_NUM_FUNCS 5

#define AMD_XCC_MAX_HID 24

struct xarray numa_info_xa;

/* Encapsulates the XCD acpi object information */
struct amdgpu_acpi_xcc_info {
	struct list_head list;
	struct amdgpu_numa_info *numa_info;
	uint8_t xcp_node;
	uint8_t phy_id;
	acpi_handle handle;
};

struct amdgpu_acpi_dev_info {
	struct list_head list;
	struct list_head xcc_list;
	uint32_t sbdf;
	uint16_t supp_xcp_mode;
	uint16_t xcp_mode;
	uint16_t mem_mode;
	uint64_t tmr_base;
	uint64_t tmr_size;
};

struct list_head amdgpu_acpi_dev_list;

struct amdgpu_atif_notification_cfg {
	bool enabled;
	int command_code;
};

struct amdgpu_atif_notifications {
	bool thermal_state;
	bool forced_power_state;
	bool system_power_state;
	bool brightness_change;
	bool dgpu_display_event;
	bool gpu_package_power_limit;
};

struct amdgpu_atif_functions {
	bool system_params;
	bool sbios_requests;
	bool temperature_change;
	bool query_backlight_transfer_characteristics;
	bool ready_to_undock;
	bool external_gpu_information;
};

struct amdgpu_atif {
	acpi_handle handle;

	struct amdgpu_atif_notifications notifications;
	struct amdgpu_atif_functions functions;
	struct amdgpu_atif_notification_cfg notification_cfg;
	struct backlight_device *bd;
	struct amdgpu_dm_backlight_caps backlight_caps;
};

struct amdgpu_atcs_functions {
	bool get_ext_state;
	bool pcie_perf_req;
	bool pcie_dev_rdy;
	bool pcie_bus_width;
	bool get_uma_size;
	bool power_shift_control;
	bool set_uma_allocation_size;
};

struct amdgpu_atcs {
	acpi_handle handle;

	struct amdgpu_atcs_functions functions;
};

static struct amdgpu_acpi_priv {
	struct amdgpu_atif atif;
	struct amdgpu_atcs atcs;
} amdgpu_acpi_priv;

/* Call the ATIF method
 */
/**
 * amdgpu_atif_call - call an ATIF method
 *
 * @atif: atif structure
 * @function: the ATIF function to execute
 * @params: ATIF function params
 *
 * Executes the requested ATIF function (all asics).
 * Returns a pointer to the acpi output buffer.
 */
static union acpi_object *amdgpu_atif_call(struct amdgpu_atif *a