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linux-stable/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c

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// 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 power_shift_control;
};
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 *atif,
int function,
struct acpi_buffer *params)
{
acpi_status status;
union acpi_object atif_arg_elements[2];
struct acpi_object_list atif_arg;
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
atif_arg.count = 2;
atif_arg.pointer = &atif_arg_elements[0];
atif_arg_elements[0].type = ACPI_TYPE_INTEGER;
atif_arg_elements[0].integer.value = function;
if (params) {
atif_arg_elements[1].type = ACPI_TYPE_BUFFER;
atif_arg_elements[1].buffer.length = params->length;
atif_arg_elements[1].buffer.pointer = params->pointer;
} else {
/* We need a second fake parameter */
atif_arg_elements[1].type = ACPI_TYPE_INTEGER;
atif_arg_elements[1].integer.value = 0;
}
status = acpi_evaluate_object(atif->handle, NULL, &atif_arg,
&buffer);
/* Fail only if calling the method fails and ATIF is supported */
if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
DRM_DEBUG_DRIVER("failed to evaluate ATIF got %s\n",
acpi_format_exception(status));
kfree(buffer.pointer);
return NULL;
}
return buffer.pointer;
}
/**
* amdgpu_atif_parse_notification - parse supported notifications
*
* @n: supported notifications struct
* @mask: supported notifications mask from ATIF
*
* Use the supported notifications mask from ATIF function
* ATIF_FUNCTION_VERIFY_INTERFACE to determine what notifications
* are supported (all asics).
*/
static void amdgpu_atif_parse_notification(struct amdgpu_atif_notifications *n, u32 mask)
{
n->thermal_state = mask & ATIF_THERMAL_STATE_CHANGE_REQUEST_SUPPORTED;
n->forced_power_state = mask & ATIF_FORCED_POWER_STATE_CHANGE_REQUEST_SUPPORTED;
n->system_power_state = mask & ATIF_SYSTEM_POWER_SOURCE_CHANGE_REQUEST_SUPPORTED;
n->brightness_change = mask & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST_SUPPORTED;
n->dgpu_display_event = mask & ATIF_DGPU_DISPLAY_EVENT_SUPPORTED;
n->gpu_package_power_limit = mask & ATIF_GPU_PACKAGE_POWER_LIMIT_REQUEST_SUPPORTED;
}
/**
* amdgpu_atif_parse_functions - parse supported functions
*
* @f: supported functions struct
* @mask: supported functions mask from ATIF
*
* Use the supported functions mask from ATIF function
* ATIF_FUNCTION_VERIFY_INTERFACE to determine what functions
* are supported (all asics).
*/
static void amdgpu_atif_parse_functions(struct amdgpu_atif_functions *f, u32 mask)
{
f->system_params = mask & ATIF_GET_SYSTEM_PARAMETERS_SUPPORTED;
f->sbios_requests = mask & ATIF_GET_SYSTEM_BIOS_REQUESTS_SUPPORTED;
f->temperature_change = mask & ATIF_TEMPERATURE_CHANGE_NOTIFICATION_SUPPORTED;
f->query_backlight_transfer_characteristics =
mask & ATIF_QUERY_BACKLIGHT_TRANSFER_CHARACTERISTICS_SUPPORTED;
f->ready_to_undock = mask & ATIF_READY_TO_UNDOCK_NOTIFICATION_SUPPORTED;
f->external_gpu_information = mask & ATIF_GET_EXTERNAL_GPU_INFORMATION_SUPPORTED;
}
/**
* amdgpu_atif_verify_interface - verify ATIF
*
* @atif: amdgpu atif struct
*
* Execute the ATIF_FUNCTION_VERIFY_INTERFACE ATIF function
* to initialize ATIF and determine what features are supported
* (all asics).
* returns 0 on success, error on failure.
*/
static int amdgpu_atif_verify_interface(struct amdgpu_atif *atif)
{
union acpi_object *info;
struct atif_verify_interface output;
size_t size;
int err = 0;
info = amdgpu_atif_call(atif, ATIF_FUNCTION_VERIFY_INTERFACE, NULL);
if (!info)
return -EIO;
memset(&output, 0, sizeof(output));
size = *(u16 *) info->buffer.pointer;
if (size < 12) {
DRM_INFO("ATIF buffer is too small: %zu\n", size);
err = -EINVAL;
goto out;
}
size = min(sizeof(output), size);
memcpy(&output, info->buffer.pointer, size);
/* TODO: check version? */
DRM_DEBUG_DRIVER("ATIF version %u\n", output.version);
amdgpu_atif_parse_notification(&atif->notifications, output.notification_mask);
amdgpu_atif_parse_functions(&atif->functions, output.function_bits);
out:
kfree(info);
return err;
}
/**
* amdgpu_atif_get_notification_params - determine notify configuration
*
* @atif: acpi handle
*
* Execute the ATIF_FUNCTION_GET_SYSTEM_PARAMETERS ATIF function
* to determine if a notifier is used and if so which one
* (all asics). This is either Notify(VGA, 0x81) or Notify(VGA, n)
* where n is specified in the result if a notifier is used.
* Returns 0 on success, error on failure.
*/
static int amdgpu_atif_get_notification_params(struct amdgpu_atif *atif)
{
union acpi_object *info;
struct amdgpu_atif_notification_cfg *n = &atif->notification_cfg;
struct atif_system_params params;
size_t size;
int err = 0;
info = amdgpu_atif_call(atif, ATIF_FUNCTION_GET_SYSTEM_PARAMETERS,
NULL);
if (!info) {
err = -EIO;
goto out;
}
size = *(u16 *) info->buffer.pointer;
if (size < 10) {
err = -EINVAL;
goto out;
}
memset(&params, 0, sizeof(params));
size = min(sizeof(params), size);
memcpy(&params, info->buffer.pointer, size);
DRM_DEBUG_DRIVER("SYSTEM_PARAMS: mask = %#x, flags = %#x\n",
params.flags, params.valid_mask);
params.flags = params.flags & params.valid_mask;
if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_NONE) {
n->enabled = false;
n->command_code = 0;
} else if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_81) {
n->enabled = true;
n->command_code = 0x81;
} else {
if (size < 11) {
err = -EINVAL;
goto out;
}
n->enabled = true;
n->command_code = params.command_code;
}
out:
DRM_DEBUG_DRIVER("Notification %s, command code = %#x\n",
(n->enabled ? "enabled" : "disabled"),
n->command_code);
kfree(info);
return err;
}
/**
* amdgpu_atif_query_backlight_caps - get min and max backlight input signal
*
* @atif: acpi handle
*
* Execute the QUERY_BRIGHTNESS_TRANSFER_CHARACTERISTICS ATIF function
* to determine the acceptable range of backlight values
*
* Backlight_caps.caps_valid will be set to true if the query is successful
*
* The input signals are in range 0-255
*
* This function assumes the display with backlight is the first LCD
*
* Returns 0 on success, error on failure.
*/
static int amdgpu_atif_query_backlight_caps(struct amdgpu_atif *atif)
{
union acpi_object *info;
struct atif_qbtc_output characteristics;
struct atif_qbtc_arguments arguments;
struct acpi_buffer params;
size_t size;
int err = 0;
arguments.size = sizeof(arguments);
arguments.requested_display = ATIF_QBTC_REQUEST_LCD1;
params.length = sizeof(arguments);
params.pointer = (void *)&arguments;
info = amdgpu_atif_call(atif,
ATIF_FUNCTION_QUERY_BRIGHTNESS_TRANSFER_CHARACTERISTICS,
&params);
if (!info) {
err = -EIO;
goto out;
}
size = *(u16 *) info->buffer.pointer;
if (size < 10) {
err = -EINVAL;
goto out;
}
memset(&characteristics, 0, sizeof(characteristics));
size = min(sizeof(characteristics), size);
memcpy(&characteristics, info->buffer.pointer, size);
atif->backlight_caps.caps_valid = true;
atif->backlight_caps.min_input_signal =
characteristics.min_input_signal;
atif->backlight_caps.max_input_signal =
characteristics.max_input_signal;
out:
kfree(info);
return err;
}
/**
* amdgpu_atif_get_sbios_requests - get requested sbios event
*
* @atif: acpi handle
* @req: atif sbios request struct
*
* Execute the ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS ATIF function
* to determine what requests the sbios is making to the driver
* (all asics).
* Returns 0 on success, error on failure.
*/
static int amdgpu_atif_get_sbios_requests(struct amdgpu_atif *atif,
struct atif_sbios_requests *req)
{
union acpi_object *info;
size_t size;
int count = 0;
info = amdgpu_atif_call(atif, ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS,
NULL);
if (!info)
return -EIO;
size = *(u16 *)info->buffer.pointer;
if (size < 0xd) {
count = -EINVAL;
goto out;
}
memset(req, 0, sizeof(*req));
size = min(sizeof(*req), size);
memcpy(req, info->buffer.pointer, size);
DRM_DEBUG_DRIVER("SBIOS pending requests: %#x\n", req->pending);
count = hweight32(req->pending);
out:
kfree(info);
return count;
}
/**
* amdgpu_atif_handler - handle ATIF notify requests
*
* @adev: amdgpu_device pointer
* @event: atif sbios request struct
*
* Checks the acpi event and if it matches an atif event,
* handles it.
*
* Returns:
* NOTIFY_BAD or NOTIFY_DONE, depending on the event.
*/
static int amdgpu_atif_handler(struct amdgpu_device *adev,
struct acpi_bus_event *event)
{
struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif;
int count;
DRM_DEBUG_DRIVER("event, device_class = %s, type = %#x\n",
event->device_class, event->type);
if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
return NOTIFY_DONE;
/* Is this actually our event? */
if (!atif->notification_cfg.enabled ||
event->type != atif->notification_cfg.command_code) {
/* These events will generate keypresses otherwise */
if (event->type == ACPI_VIDEO_NOTIFY_PROBE)
return NOTIFY_BAD;
else
return NOTIFY_DONE;
}
if (atif->functions.sbios_requests) {
struct atif_sbios_requests req;
/* Check pending SBIOS requests */
count = amdgpu_atif_get_sbios_requests(atif, &req);
if (count <= 0)
return NOTIFY_BAD;
DRM_DEBUG_DRIVER("ATIF: %d pending SBIOS requests\n", count);
if (req.pending & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST) {
if (atif->bd) {
DRM_DEBUG_DRIVER("Changing brightness to %d\n",
req.backlight_level);
/*
* XXX backlight_device_set_brightness() is
* hardwired to post BACKLIGHT_UPDATE_SYSFS.
* It probably should accept 'reason' parameter.
*/
backlight_device_set_brightness(atif->bd, req.backlight_level);
}
}
if (req.pending & ATIF_DGPU_DISPLAY_EVENT) {
if (adev->flags & AMD_IS_PX) {
pm_runtime_get_sync(adev_to_drm(adev)->dev);
/* Just fire off a uevent and let userspace tell us what to do */
drm_helper_hpd_irq_event(adev_to_drm(adev));
pm_runtime_mark_last_busy(adev_to_drm(adev)->dev);
pm_runtime_put_autosuspend(adev_to_drm(adev)->dev);
}
}
/* TODO: check other events */
}
/* We've handled the event, stop the notifier chain. The ACPI interface
* overloads ACPI_VIDEO_NOTIFY_PROBE, we don't want to send that to
* userspace if the event was generated only to signal a SBIOS
* request.
*/
return NOTIFY_BAD;
}
/* Call the ATCS method
*/
/**
* amdgpu_atcs_call - call an ATCS method
*
* @atcs: atcs structure
* @function: the ATCS function to execute
* @params: ATCS function params
*
* Executes the requested ATCS function (all asics).
* Returns a pointer to the acpi output buffer.
*/
static union acpi_object *amdgpu_atcs_call(struct amdgpu_atcs *atcs,
int function,
struct acpi_buffer *params)
{
acpi_status status;
union acpi_object atcs_arg_elements[2];
struct acpi_object_list atcs_arg;
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
atcs_arg.count = 2;
atcs_arg.pointer = &atcs_arg_elements[0];
atcs_arg_elements[0].type = ACPI_TYPE_INTEGER;
atcs_arg_elements[0].integer.value = function;
if (params) {
atcs_arg_elements[1].type = ACPI_TYPE_BUFFER;
atcs_arg_elements[1].buffer.length = params->length;
atcs_arg_elements[1].buffer.pointer = params->pointer;
} else {
/* We need a second fake parameter */
atcs_arg_elements[1].type = ACPI_TYPE_INTEGER;
atcs_arg_elements[1].integer.value = 0;
}
status = acpi_evaluate_object(atcs->handle, NULL, &atcs_arg, &buffer);
/* Fail only if calling the method fails and ATIF is supported */
if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
DRM_DEBUG_DRIVER("failed to evaluate ATCS got %s\n",
acpi_format_exception(status));
kfree(buffer.pointer);
return NULL;
}
return buffer.pointer;
}
/**
* amdgpu_atcs_parse_functions - parse supported functions
*
* @f: supported functions struct
* @mask: supported functions mask from ATCS
*
* Use the supported functions mask from ATCS function
* ATCS_FUNCTION_VERIFY_INTERFACE to determine what functions
* are supported (all asics).
*/
static void amdgpu_atcs_parse_functions(struct amdgpu_atcs_functions *f, u32 mask)
{
f->get_ext_state = mask & ATCS_GET_EXTERNAL_STATE_SUPPORTED;
f->pcie_perf_req = mask & ATCS_PCIE_PERFORMANCE_REQUEST_SUPPORTED;
f->pcie_dev_rdy = mask & ATCS_PCIE_DEVICE_READY_NOTIFICATION_SUPPORTED;
f->pcie_bus_width = mask & ATCS_SET_PCIE_BUS_WIDTH_SUPPORTED;
f->power_shift_control = mask & ATCS_SET_POWER_SHIFT_CONTROL_SUPPORTED;
}
/**
* amdgpu_atcs_verify_interface - verify ATCS
*
* @atcs: amdgpu atcs struct
*
* Execute the ATCS_FUNCTION_VERIFY_INTERFACE ATCS function
* to initialize ATCS and determine what features are supported
* (all asics).
* returns 0 on success, error on failure.
*/
static int amdgpu_atcs_verify_interface(struct amdgpu_atcs *atcs)
{
union acpi_object *info;
struct atcs_verify_interface output;
size_t size;
int err = 0;
info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_VERIFY_INTERFACE, NULL);
if (!info)
return -EIO;
memset(&output, 0, sizeof(output));
size = *(u16 *) info->buffer.pointer;
if (size < 8) {
DRM_INFO("ATCS buffer is too small: %zu\n", size);
err = -EINVAL;
goto out;
}
size = min(sizeof(output), size);
memcpy(&output, info->buffer.pointer, size);
/* TODO: check version? */
DRM_DEBUG_DRIVER("ATCS version %u\n", output.version);
amdgpu_atcs_parse_functions(&atcs->functions, output.function_bits);
out:
kfree(info);
return err;
}
/**
* amdgpu_acpi_is_pcie_performance_request_supported
*
* @adev: amdgpu_device pointer
*
* Check if the ATCS pcie_perf_req and pcie_dev_rdy methods
* are supported (all asics).
* returns true if supported, false if not.
*/
bool amdgpu_acpi_is_pcie_performance_request_supported(struct amdgpu_device *adev)
{
struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
if (atcs->functions.pcie_perf_req && atcs->functions.pcie_dev_rdy)
return true;
return false;
}
/**
* amdgpu_acpi_is_power_shift_control_supported
*
* Check if the ATCS power shift control method
* is supported.
* returns true if supported, false if not.
*/
bool amdgpu_acpi_is_power_shift_control_supported(void)
{
return amdgpu_acpi_priv.atcs.functions.power_shift_control;
}
/**
* amdgpu_acpi_pcie_notify_device_ready
*
* @adev: amdgpu_device pointer
*
* Executes the PCIE_DEVICE_READY_NOTIFICATION method
* (all asics).
* returns 0 on success, error on failure.
*/
int amdgpu_acpi_pcie_notify_device_ready(struct amdgpu_device *adev)
{
union acpi_object *info;
struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
if (!atcs->functions.pcie_dev_rdy)
return -EINVAL;
info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_PCIE_DEVICE_READY_NOTIFICATION, NULL);
if (!info)
return -EIO;
kfree(info);
return 0;
}
/**
* amdgpu_acpi_pcie_performance_request
*
* @adev: amdgpu_device pointer
* @perf_req: requested perf level (pcie gen speed)
* @advertise: set advertise caps flag if set
*
* Executes the PCIE_PERFORMANCE_REQUEST method to
* change the pcie gen speed (all asics).
* returns 0 on success, error on failure.
*/
int amdgpu_acpi_pcie_performance_request(struct amdgpu_device *adev,
u8 perf_req, bool advertise)
{
union acpi_object *info;
struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
struct atcs_pref_req_input atcs_input;
struct atcs_pref_req_output atcs_output;
struct acpi_buffer params;
size_t size;
u32 retry = 3;
if (amdgpu_acpi_pcie_notify_device_ready(adev))
return -EINVAL;
if (!atcs->functions.pcie_perf_req)
return -EINVAL;
atcs_input.size = sizeof(struct atcs_pref_req_input);
/* client id (bit 2-0: func num, 7-3: dev num, 15-8: bus num) */
atcs_input.client_id = pci_dev_id(adev->pdev);
atcs_input.valid_flags_mask = ATCS_VALID_FLAGS_MASK;
atcs_input.flags = ATCS_WAIT_FOR_COMPLETION;
if (advertise)
atcs_input.flags |= ATCS_ADVERTISE_CAPS;
atcs_input.req_type = ATCS_PCIE_LINK_SPEED;
atcs_input.perf_req = perf_req;
params.length = sizeof(struct atcs_pref_req_input);
params.pointer = &atcs_input;
while (retry--) {
info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_PCIE_PERFORMANCE_REQUEST, &params);
if (!info)
return -EIO;
memset(&atcs_output, 0, sizeof(atcs_output));
size = *(u16 *) info->buffer.pointer;
if (size < 3) {
DRM_INFO("ATCS buffer is too small: %zu\n", size);
kfree(info);
return -EINVAL;
}
size = min(sizeof(atcs_output), size);
memcpy(&atcs_output, info->buffer.pointer, size);
kfree(info);
switch (atcs_output.ret_val) {
case ATCS_REQUEST_REFUSED:
default:
return -EINVAL;
case ATCS_REQUEST_COMPLETE:
return 0;
case ATCS_REQUEST_IN_PROGRESS:
udelay(10);
break;
}
}
return 0;
}
/**
* amdgpu_acpi_power_shift_control
*
* @adev: amdgpu_device pointer
* @dev_state: device acpi state
* @drv_state: driver state
*
* Executes the POWER_SHIFT_CONTROL method to
* communicate current dGPU device state and
* driver state to APU/SBIOS.
* returns 0 on success, error on failure.
*/
int amdgpu_acpi_power_shift_control(struct amdgpu_device *adev,
u8 dev_state, bool drv_state)
{
union acpi_object *info;
struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
struct atcs_pwr_shift_input atcs_input;
struct acpi_buffer params;
if (!amdgpu_acpi_is_power_shift_control_supported())
return -EINVAL;
atcs_input.size = sizeof(struct atcs_pwr_shift_input);
/* dGPU id (bit 2-0: func num, 7-3: dev num, 15-8: bus num) */
atcs_input.dgpu_id = pci_dev_id(adev->pdev);
atcs_input.dev_acpi_state = dev_state;
atcs_input.drv_state = drv_state;
params.length = sizeof(struct atcs_pwr_shift_input);
params.pointer = &atcs_input;
info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_POWER_SHIFT_CONTROL, &params);
if (!info) {
DRM_ERROR("ATCS PSC update failed\n");
return -EIO;
}
return 0;
}
/**
* amdgpu_acpi_smart_shift_update - update dGPU device state to SBIOS
*
* @dev: drm_device pointer
* @ss_state: current smart shift event
*
* returns 0 on success,
* otherwise return error number.
*/
int amdgpu_acpi_smart_shift_update(struct drm_device *dev, enum amdgpu_ss ss_state)
{
struct amdgpu_device *adev = drm_to_adev(dev);
int r;
if (!amdgpu_device_supports_smart_shift(dev))
return 0;
switch (ss_state) {
/* SBIOS trigger “stop”, “enable” and “start” at D0, Driver Operational.
* SBIOS trigger “stop” at D3, Driver Not Operational.
* SBIOS trigger “stop” and “disable” at D0, Driver NOT operational.
*/
case AMDGPU_SS_DRV_LOAD:
r = amdgpu_acpi_power_shift_control(adev,
AMDGPU_ATCS_PSC_DEV_STATE_D0,
AMDGPU_ATCS_PSC_DRV_STATE_OPR);
break;
case AMDGPU_SS_DEV_D0:
r = amdgpu_acpi_power_shift_control(adev,
AMDGPU_ATCS_PSC_DEV_STATE_D0,
AMDGPU_ATCS_PSC_DRV_STATE_OPR);
break;
case AMDGPU_SS_DEV_D3:
r = amdgpu_acpi_power_shift_control(adev,
AMDGPU_ATCS_PSC_DEV_STATE_D3_HOT,
AMDGPU_ATCS_PSC_DRV_STATE_NOT_OPR);
break;
case AMDGPU_SS_DRV_UNLOAD:
r = amdgpu_acpi_power_shift_control(adev,
AMDGPU_ATCS_PSC_DEV_STATE_D0,
AMDGPU_ATCS_PSC_DRV_STATE_NOT_OPR);
break;
default:
return -EINVAL;
}
return r;
}
#ifdef CONFIG_ACPI_NUMA
static inline uint64_t amdgpu_acpi_get_numa_size(int nid)
{
/* This is directly using si_meminfo_node implementation as the
* function is not exported.
*/
int zone_type;
uint64_t managed_pages = 0;
pg_data_t *pgdat = NODE_DATA(nid);
for (zone_type = 0; zone_type < MAX_NR_ZONES; zone_type++)
managed_pages +=
zone_managed_pages(&pgdat->node_zones[zone_type]);
return managed_pages * PAGE_SIZE;
}
static struct amdgpu_numa_info *amdgpu_acpi_get_numa_info(uint32_t pxm)
{
struct amdgpu_numa_info *numa_info;
int nid;
numa_info = xa_load(&numa_info_xa, pxm);
if (!numa_info) {
struct sysinfo info;
numa_info = kzalloc(sizeof(*numa_info), GFP_KERNEL);
if (!numa_info)
return NULL;
nid = pxm_to_node(pxm);
numa_info->pxm = pxm;
numa_info->nid = nid;
if (numa_info->nid == NUMA_NO_NODE) {
si_meminfo(&info);
numa_info->size = info.totalram * info.mem_unit;
} else {
numa_info->size = amdgpu_acpi_get_numa_size(nid);
}
xa_store(&numa_info_xa, numa_info->pxm, numa_info, GFP_KERNEL);
}
return numa_info;
}
#endif
/**
* amdgpu_acpi_get_node_id - obtain the NUMA node id for corresponding amdgpu
* acpi device handle
*
* @handle: acpi handle
* @numa_info: amdgpu_numa_info structure holding numa information
*
* Queries the ACPI interface to fetch the corresponding NUMA Node ID for a
* given amdgpu acpi device.
*
* Returns ACPI STATUS OK with Node ID on success or the corresponding failure reason
*/
static acpi_status amdgpu_acpi_get_node_id(acpi_handle handle,
struct amdgpu_numa_info **numa_info)
{
#ifdef CONFIG_ACPI_NUMA
u64 pxm;
acpi_status status;
if (!numa_info)
return_ACPI_STATUS(AE_ERROR);
status = acpi_evaluate_integer(handle, "_PXM", NULL, &pxm);
if (ACPI_FAILURE(status))
return status;
*numa_info = amdgpu_acpi_get_numa_info(pxm);
if (!*numa_info)
return_ACPI_STATUS(AE_ERROR);
return_ACPI_STATUS(AE_OK);
#else
return_ACPI_STATUS(AE_NOT_EXIST);
#endif
}
static struct amdgpu_acpi_dev_info *amdgpu_acpi_get_dev(u32 sbdf)
{
struct amdgpu_acpi_dev_info *acpi_dev;
if (list_empty(&amdgpu_acpi_dev_list))
return NULL;
list_for_each_entry(acpi_dev, &amdgpu_acpi_dev_list, list)
if (acpi_dev->sbdf == sbdf)
return acpi_dev;
return NULL;
}
static int amdgpu_acpi_dev_init(struct amdgpu_acpi_dev_info **dev_info,
struct amdgpu_acpi_xcc_info *xcc_info, u32 sbdf)
{
struct amdgpu_acpi_dev_info *tmp;
union acpi_object *obj;
int ret = -ENOENT;
*dev_info = NULL;
tmp = kzalloc(sizeof(struct amdgpu_acpi_dev_info), GFP_KERNEL);
if (!tmp)
return -ENOMEM;
INIT_LIST_HEAD(&tmp->xcc_list);
INIT_LIST_HEAD(&tmp->list);
tmp->sbdf = sbdf;
obj = acpi_evaluate_dsm_typed(xcc_info->handle, &amd_xcc_dsm_guid, 0,
AMD_XCC_DSM_GET_SUPP_MODE, NULL,
ACPI_TYPE_INTEGER);
if (!obj) {
acpi_handle_debug(xcc_info->handle,
"_DSM function %d evaluation failed",
AMD_XCC_DSM_GET_SUPP_MODE);
ret = -ENOENT;
goto out;
}
tmp->supp_xcp_mode = obj->integer.value & 0xFFFF;
ACPI_FREE(obj);
obj = acpi_evaluate_dsm_typed(xcc_info->handle, &amd_xcc_dsm_guid, 0,
AMD_XCC_DSM_GET_XCP_MODE, NULL,
ACPI_TYPE_INTEGER);
if (!obj) {
acpi_handle_debug(xcc_info->handle,
"_DSM function %d evaluation failed",
AMD_XCC_DSM_GET_XCP_MODE);
ret = -ENOENT;
goto out;
}
tmp->xcp_mode = obj->integer.value & 0xFFFF;
tmp->mem_mode = (obj->integer.value >> 32) & 0xFFFF;
ACPI_FREE(obj);
/* Evaluate DSMs and fill XCC information */
obj = acpi_evaluate_dsm_typed(xcc_info->handle, &amd_xcc_dsm_guid, 0,
AMD_XCC_DSM_GET_TMR_INFO, NULL,
ACPI_TYPE_PACKAGE);
if (!obj || obj->package.count < 2) {
acpi_handle_debug(xcc_info->handle,
"_DSM function %d evaluation failed",
AMD_XCC_DSM_GET_TMR_INFO);
ret = -ENOENT;
goto out;
}
tmp->tmr_base = obj->package.elements[0].integer.value;
tmp->tmr_size = obj->package.elements[1].integer.value;
ACPI_FREE(obj);
DRM_DEBUG_DRIVER(
"New dev(%x): Supported xcp mode: %x curr xcp_mode : %x mem mode : %x, tmr base: %llx tmr size: %llx ",
tmp->sbdf, tmp->supp_xcp_mode, tmp->xcp_mode, tmp->mem_mode,
tmp->tmr_base, tmp->tmr_size);
list_add_tail(&tmp->list, &amdgpu_acpi_dev_list);
*dev_info = tmp;
return 0;
out:
if (obj)
ACPI_FREE(obj);
kfree(tmp);
return ret;
}
static int amdgpu_acpi_get_xcc_info(struct amdgpu_acpi_xcc_info *xcc_info,
u32 *sbdf)
{
union acpi_object *obj;
acpi_status status;
int ret = -ENOENT;
obj = acpi_evaluate_dsm_typed(xcc_info->handle, &amd_xcc_dsm_guid, 0,
AMD_XCC_DSM_GET_NUM_FUNCS, NULL,
ACPI_TYPE_INTEGER);
if (!obj || obj->integer.value != AMD_XCC_DSM_NUM_FUNCS)
goto out;
ACPI_FREE(obj);
/* Evaluate DSMs and fill XCC information */
obj = acpi_evaluate_dsm_typed(xcc_info->handle, &amd_xcc_dsm_guid, 0,
AMD_XCC_DSM_GET_VF_XCC_MAPPING, NULL,
ACPI_TYPE_INTEGER);
if (!obj) {
acpi_handle_debug(xcc_info->handle,
"_DSM function %d evaluation failed",
AMD_XCC_DSM_GET_VF_XCC_MAPPING);
ret = -EINVAL;
goto out;
}
/* PF xcc id [39:32] */
xcc_info->phy_id = (obj->integer.value >> 32) & 0xFF;
/* xcp node of this xcc [47:40] */
xcc_info->xcp_node = (obj->integer.value >> 40) & 0xFF;
/* PF domain of this xcc [31:16] */
*sbdf = (obj->integer.value) & 0xFFFF0000;
/* PF bus/dev/fn of this xcc [63:48] */
*sbdf |= (obj->integer.value >> 48) & 0xFFFF;
ACPI_FREE(obj);
obj = NULL;
status =
amdgpu_acpi_get_node_id(xcc_info->handle, &xcc_info->numa_info);
/* TODO: check if this check is required */
if (ACPI_SUCCESS(status))
ret = 0;
out:
if (obj)
ACPI_FREE(obj);
return ret;
}
static int amdgpu_acpi_enumerate_xcc(void)
{
struct amdgpu_acpi_dev_info *dev_info = NULL;
struct amdgpu_acpi_xcc_info *xcc_info;
struct acpi_device *acpi_dev;
char hid[ACPI_ID_LEN];
int ret, id;
u32 sbdf;
INIT_LIST_HEAD(&amdgpu_acpi_dev_list);
xa_init(&numa_info_xa);
for (id = 0; id < AMD_XCC_MAX_HID; id++) {
sprintf(hid, "%s%d", "AMD", AMD_XCC_HID_START + id);
acpi_dev = acpi_dev_get_first_match_dev(hid, NULL, -1);
/* These ACPI objects are expected to be in sequential order. If
* one is not found, no need to check the rest.
*/
if (!acpi_dev) {
DRM_DEBUG_DRIVER("No matching acpi device found for %s",
hid);
break;
}
xcc_info = kzalloc(sizeof(struct amdgpu_acpi_xcc_info),
GFP_KERNEL);
if (!xcc_info) {
DRM_ERROR("Failed to allocate memory for xcc info\n");
return -ENOMEM;
}
INIT_LIST_HEAD(&xcc_info->list);
xcc_info->handle = acpi_device_handle(acpi_dev);
acpi_dev_put(acpi_dev);
ret = amdgpu_acpi_get_xcc_info(xcc_info, &sbdf);
if (ret) {
kfree(xcc_info);
continue;
}
dev_info = amdgpu_acpi_get_dev(sbdf);
if (!dev_info)
ret = amdgpu_acpi_dev_init(&dev_info, xcc_info, sbdf);
if (ret == -ENOMEM)
return ret;
if (!dev_info) {
kfree(xcc_info);
continue;
}
list_add_tail(&xcc_info->list, &dev_info->xcc_list);
}
return 0;
}
int amdgpu_acpi_get_tmr_info(struct amdgpu_device *adev, u64 *tmr_offset,
u64 *tmr_size)
{
struct amdgpu_acpi_dev_info *dev_info;
u32 sbdf;
if (!tmr_offset || !tmr_size)
return -EINVAL;
sbdf = (pci_domain_nr(adev->pdev->bus) << 16);
sbdf |= pci_dev_id(adev->pdev);
dev_info = amdgpu_acpi_get_dev(sbdf);
if (!dev_info)
return -ENOENT;
*tmr_offset = dev_info->tmr_base;
*tmr_size = dev_info->tmr_size;
return 0;
}
int amdgpu_acpi_get_mem_info(struct amdgpu_device *adev, int xcc_id,
struct amdgpu_numa_info *numa_info)
{
struct amdgpu_acpi_dev_info *dev_info;
struct amdgpu_acpi_xcc_info *xcc_info;
u32 sbdf;
if (!numa_info)
return -EINVAL;
sbdf = (pci_domain_nr(adev->pdev->bus) << 16);
sbdf |= pci_dev_id(adev->pdev);
dev_info = amdgpu_acpi_get_dev(sbdf);
if (!dev_info)
return -ENOENT;
list_for_each_entry(xcc_info, &dev_info->xcc_list, list) {
if (xcc_info->phy_id == xcc_id) {
memcpy(numa_info, xcc_info->numa_info,
sizeof(*numa_info));
return 0;
}
}
return -ENOENT;
}
/**
* amdgpu_acpi_event - handle notify events
*
* @nb: notifier block
* @val: val
* @data: acpi event
*
* Calls relevant amdgpu functions in response to various
* acpi events.
* Returns NOTIFY code
*/
static int amdgpu_acpi_event(struct notifier_block *nb,
unsigned long val,
void *data)
{
struct amdgpu_device *adev = container_of(nb, struct amdgpu_device, acpi_nb);
struct acpi_bus_event *entry = (struct acpi_bus_event *)data;
if (strcmp(entry->device_class, ACPI_AC_CLASS) == 0) {
if (power_supply_is_system_supplied() > 0)
DRM_DEBUG_DRIVER("pm: AC\n");
else
DRM_DEBUG_DRIVER("pm: DC\n");
amdgpu_pm_acpi_event_handler(adev);
}
/* Check for pending SBIOS requests */
return amdgpu_atif_handler(adev, entry);
}
/* Call all ACPI methods here */
/**
* amdgpu_acpi_init - init driver acpi support
*
* @adev: amdgpu_device pointer
*
* Verifies the AMD ACPI interfaces and registers with the acpi
* notifier chain (all asics).
* Returns 0 on success, error on failure.
*/
int amdgpu_acpi_init(struct amdgpu_device *adev)
{
struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif;
if (atif->notifications.brightness_change) {
if (adev->dc_enabled) {
#if defined(CONFIG_DRM_AMD_DC)
struct amdgpu_display_manager *dm = &adev->dm;
if (dm->backlight_dev[0])
atif->bd = dm->backlight_dev[0];
#endif
} else {
struct drm_encoder *tmp;
/* Find the encoder controlling the brightness */
list_for_each_entry(tmp, &adev_to_drm(adev)->mode_config.encoder_list,
head) {
struct amdgpu_encoder *enc = to_amdgpu_encoder(tmp);
if ((enc->devices & (ATOM_DEVICE_LCD_SUPPORT)) &&
enc->enc_priv) {
struct amdgpu_encoder_atom_dig *dig = enc->enc_priv;
if (dig->bl_dev) {
atif->bd = dig->bl_dev;
break;
}
}
}
}
}
adev->acpi_nb.notifier_call = amdgpu_acpi_event;
register_acpi_notifier(&adev->acpi_nb);
return 0;
}
void amdgpu_acpi_get_backlight_caps(struct amdgpu_dm_backlight_caps *caps)
{
struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif;
caps->caps_valid = atif->backlight_caps.caps_valid;
caps->min_input_signal = atif->backlight_caps.min_input_signal;
caps->max_input_signal = atif->backlight_caps.max_input_signal;
}
/**
* amdgpu_acpi_fini - tear down driver acpi support
*
* @adev: amdgpu_device pointer
*
* Unregisters with the acpi notifier chain (all asics).
*/
void amdgpu_acpi_fini(struct amdgpu_device *adev)
{
unregister_acpi_notifier(&adev->acpi_nb);
}
/**
* amdgpu_atif_pci_probe_handle - look up the ATIF handle
*
* @pdev: pci device
*
* Look up the ATIF handles (all asics).
* Returns true if the handle is found, false if not.
*/
static bool amdgpu_atif_pci_probe_handle(struct pci_dev *pdev)
{
char acpi_method_name[255] = { 0 };
struct acpi_buffer buffer = {sizeof(acpi_method_name), acpi_method_name};
acpi_handle dhandle, atif_handle;
acpi_status status;
int ret;
dhandle = ACPI_HANDLE(&pdev->dev);
if (!dhandle)
return false;
status = acpi_get_handle(dhandle, "ATIF", &atif_handle);
if (ACPI_FAILURE(status))
return false;
amdgpu_acpi_priv.atif.handle = atif_handle;
acpi_get_name(amdgpu_acpi_priv.atif.handle, ACPI_FULL_PATHNAME, &buffer);
DRM_DEBUG_DRIVER("Found ATIF handle %s\n", acpi_method_name);
ret = amdgpu_atif_verify_interface(&amdgpu_acpi_priv.atif);
if (ret) {
amdgpu_acpi_priv.atif.handle = 0;
return false;
}
return true;
}
/**
* amdgpu_atcs_pci_probe_handle - look up the ATCS handle
*
* @pdev: pci device
*
* Look up the ATCS handles (all asics).
* Returns true if the handle is found, false if not.
*/
static bool amdgpu_atcs_pci_probe_handle(struct pci_dev *pdev)
{
char acpi_method_name[255] = { 0 };
struct acpi_buffer buffer = { sizeof(acpi_method_name), acpi_method_name };
acpi_handle dhandle, atcs_handle;
acpi_status status;
int ret;
dhandle = ACPI_HANDLE(&pdev->dev);
if (!dhandle)
return false;
status = acpi_get_handle(dhandle, "ATCS", &atcs_handle);
if (ACPI_FAILURE(status))
return false;
amdgpu_acpi_priv.atcs.handle = atcs_handle;
acpi_get_name(amdgpu_acpi_priv.atcs.handle, ACPI_FULL_PATHNAME, &buffer);
DRM_DEBUG_DRIVER("Found ATCS handle %s\n", acpi_method_name);
ret = amdgpu_atcs_verify_interface(&amdgpu_acpi_priv.atcs);
if (ret) {
amdgpu_acpi_priv.atcs.handle = 0;
return false;
}
return true;
}
/**
* amdgpu_acpi_should_gpu_reset
*
* @adev: amdgpu_device_pointer
*
* returns true if should reset GPU, false if not
*/
bool amdgpu_acpi_should_gpu_reset(struct amdgpu_device *adev)
{
if ((adev->flags & AMD_IS_APU) &&
adev->gfx.imu.funcs) /* Not need to do mode2 reset for IMU enabled APUs */
return false;
if ((adev->flags & AMD_IS_APU) &&
amdgpu_acpi_is_s3_active(adev))
return false;
if (amdgpu_sriov_vf(adev))
return false;
#if IS_ENABLED(CONFIG_SUSPEND)
return pm_suspend_target_state != PM_SUSPEND_TO_IDLE;
#else
return true;
#endif
}
/*
* amdgpu_acpi_detect - detect ACPI ATIF/ATCS methods
*
* Check if we have the ATIF/ATCS methods and populate
* the structures in the driver.
*/
void amdgpu_acpi_detect(void)
{
struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif;
struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
struct pci_dev *pdev = NULL;
int ret;
while ((pdev = pci_get_base_class(PCI_BASE_CLASS_DISPLAY, pdev))) {
if ((pdev->class != PCI_CLASS_DISPLAY_VGA << 8) &&
(pdev->class != PCI_CLASS_DISPLAY_OTHER << 8))
continue;
if (!atif->handle)
amdgpu_atif_pci_probe_handle(pdev);
if (!atcs->handle)
amdgpu_atcs_pci_probe_handle(pdev);
}
if (atif->functions.sbios_requests && !atif->functions.system_params) {
/* XXX check this workraround, if sbios request function is
* present we have to see how it's configured in the system
* params
*/
atif->functions.system_params = true;
}
if (atif->functions.system_params) {
ret = amdgpu_atif_get_notification_params(atif);
if (ret) {
DRM_DEBUG_DRIVER("Call to GET_SYSTEM_PARAMS failed: %d\n",
ret);
/* Disable notification */
atif->notification_cfg.enabled = false;
}
}
if (atif->functions.query_backlight_transfer_characteristics) {
ret = amdgpu_atif_query_backlight_caps(atif);
if (ret) {
DRM_DEBUG_DRIVER("Call to QUERY_BACKLIGHT_TRANSFER_CHARACTERISTICS failed: %d\n",
ret);
atif->backlight_caps.caps_valid = false;
}
} else {
atif->backlight_caps.caps_valid = false;
}
amdgpu_acpi_enumerate_xcc();
}
void amdgpu_acpi_release(void)
{
struct amdgpu_acpi_dev_info *dev_info, *dev_tmp;
struct amdgpu_acpi_xcc_info *xcc_info, *xcc_tmp;
struct amdgpu_numa_info *numa_info;
unsigned long index;
xa_for_each(&numa_info_xa, index, numa_info) {
kfree(numa_info);
xa_erase(&numa_info_xa, index);
}
if (list_empty(&amdgpu_acpi_dev_list))
return;
list_for_each_entry_safe(dev_info, dev_tmp, &amdgpu_acpi_dev_list,
list) {
list_for_each_entry_safe(xcc_info, xcc_tmp, &dev_info->xcc_list,
list) {
list_del(&xcc_info->list);
kfree(xcc_info);
}
list_del(&dev_info->list);
kfree(dev_info);
}
}
#if IS_ENABLED(CONFIG_SUSPEND)
/**
* amdgpu_acpi_is_s3_active
*
* @adev: amdgpu_device_pointer
*
* returns true if supported, false if not.
*/
bool amdgpu_acpi_is_s3_active(struct amdgpu_device *adev)
{
return !(adev->flags & AMD_IS_APU) ||
(pm_suspend_target_state == PM_SUSPEND_MEM);
}
/**
* amdgpu_acpi_is_s0ix_active
*
* @adev: amdgpu_device_pointer
*
* returns true if supported, false if not.
*/
bool amdgpu_acpi_is_s0ix_active(struct amdgpu_device *adev)
{
if (!(adev->flags & AMD_IS_APU) ||
(pm_suspend_target_state != PM_SUSPEND_TO_IDLE))
return false;
if (adev->asic_type < CHIP_RAVEN)
return false;
if (!(adev->pm.pp_feature & PP_GFXOFF_MASK))
return false;
/*
* If ACPI_FADT_LOW_POWER_S0 is not set in the FADT, it is generally
* risky to do any special firmware-related preparations for entering
* S0ix even though the system is suspending to idle, so return false
* in that case.
*/
if (!(acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0)) {
dev_err_once(adev->dev,
"Power consumption will be higher as BIOS has not been configured for suspend-to-idle.\n"
"To use suspend-to-idle change the sleep mode in BIOS setup.\n");
return false;
}
#if !IS_ENABLED(CONFIG_AMD_PMC)
dev_err_once(adev->dev,
"Power consumption will be higher as the kernel has not been compiled with CONFIG_AMD_PMC.\n");
return false;
#else
return true;
#endif /* CONFIG_AMD_PMC */
}
/**
* amdgpu_choose_low_power_state
*
* @adev: amdgpu_device_pointer
*
* Choose the target low power state for the GPU
*/
void amdgpu_choose_low_power_state(struct amdgpu_device *adev)
{
if (amdgpu_acpi_is_s0ix_active(adev))
adev->in_s0ix = true;
else if (amdgpu_acpi_is_s3_active(adev))
adev->in_s3 = true;
}
#endif /* CONFIG_SUSPEND */
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