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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c | |
parent | Initial commit. (diff) | |
download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c')
-rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c | 1518 |
1 files changed, 1518 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c new file mode 100644 index 0000000000..2bca37044a --- /dev/null +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c @@ -0,0 +1,1518 @@ +// 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; + uint16_t bdf; + 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(¶ms, 0, sizeof(params)); + size = min(sizeof(params), size); + memcpy(¶ms, 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, + ¶ms); + 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, ¶ms); + 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, ¶ms); + 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(u16 bdf) +{ + 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->bdf == bdf) + 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, u16 bdf) +{ + 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->bdf = bdf; + + 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->bdf, 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, + u16 *bdf) +{ + 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 bus/dev/fn of this xcc [63:48] */ + *bdf = (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; + u16 bdf; + + 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, &bdf); + if (ret) { + kfree(xcc_info); + continue; + } + + dev_info = amdgpu_acpi_get_dev(bdf); + + if (!dev_info) + ret = amdgpu_acpi_dev_init(&dev_info, xcc_info, bdf); + + 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; + u16 bdf; + + if (!tmr_offset || !tmr_size) + return -EINVAL; + + bdf = pci_dev_id(adev->pdev); + dev_info = amdgpu_acpi_get_dev(bdf); + 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; + u16 bdf; + + if (!numa_info) + return -EINVAL; + + bdf = pci_dev_id(adev->pdev); + dev_info = amdgpu_acpi_get_dev(bdf); + 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_class(PCI_CLASS_DISPLAY_VGA << 8, pdev)) != NULL) { + if (!atif->handle) + amdgpu_atif_pci_probe_handle(pdev); + if (!atcs->handle) + amdgpu_atcs_pci_probe_handle(pdev); + } + + while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_OTHER << 8, pdev)) != NULL) { + 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 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 */ +} + +#endif /* CONFIG_SUSPEND */ |