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drm/amdgpu/acpi: unify ATCS handling (v3)

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Treat it like ATIF and check both the dGPU and APU for
the method.  This is required because ATCS may be hung
off of the APU in ACPI on A+A systems.

v2: add back accidently removed ACPI handle check.
v3: Fix incorrect atif check (Colin)
    Fix uninitialized variable (Colin)

Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2021-05-19 15:47:42 -04:00
parent cd11b58cce
commit 77bf762f8b
2 changed files with 93 additions and 52 deletions
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17
drivers/gpu/drm/amd/amdgpu/amdgpu.h
View file

@ -269,6 +269,7 @@ struct amdgpu_irq_src;
struct amdgpu_fpriv;
struct amdgpu_bo_va_mapping;
struct amdgpu_atif;
struct amdgpu_atcs;
struct kfd_vm_fault_info;
struct amdgpu_hive_info;
struct amdgpu_reset_context;
@ -682,20 +683,6 @@ struct amdgpu_vram_scratch {
u64 gpu_addr;
};
/*
* ACPI
*/
struct amdgpu_atcs_functions {
bool get_ext_state;
bool pcie_perf_req;
bool pcie_dev_rdy;
bool pcie_bus_width;
};
struct amdgpu_atcs {
struct amdgpu_atcs_functions functions;
};
/*
* CGS
*/
@ -826,7 +813,7 @@ struct amdgpu_device {
struct amdgpu_i2c_chan *i2c_bus[AMDGPU_MAX_I2C_BUS];
struct debugfs_blob_wrapper debugfs_vbios_blob;
struct amdgpu_atif *atif;
struct amdgpu_atcs atcs;
struct amdgpu_atcs *atcs;
struct mutex srbm_mutex;
/* GRBM index mutex. Protects concurrent access to GRBM index */
struct mutex grbm_idx_mutex;

128
drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c
View file

@ -71,12 +71,25 @@ struct amdgpu_atif {
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;
};
struct amdgpu_atcs {
acpi_handle handle;
struct amdgpu_atcs_functions functions;
};
/* Call the ATIF method
*/
/**
* amdgpu_atif_call - call an ATIF method
*
* @atif: acpi handle
* @atif: atif structure
* @function: the ATIF function to execute
* @params: ATIF function params
*
@ -236,6 +249,35 @@ static acpi_handle amdgpu_atif_probe_handle(acpi_handle dhandle)
return handle;
}
static acpi_handle amdgpu_atcs_probe_handle(acpi_handle dhandle)
{
acpi_handle handle = NULL;
char acpi_method_name[255] = { 0 };
struct acpi_buffer buffer = { sizeof(acpi_method_name), acpi_method_name };
acpi_status status;
/* For PX/HG systems, ATCS and ATPX are in the iGPU's namespace, on dGPU only
* systems, ATIF is in the dGPU's namespace.
*/
status = acpi_get_handle(dhandle, "ATCS", &handle);
if (ACPI_SUCCESS(status))
goto out;
if (amdgpu_has_atpx()) {
status = acpi_get_handle(amdgpu_atpx_get_dhandle(), "ATCS",
&handle);
if (ACPI_SUCCESS(status))
goto out;
}
DRM_DEBUG_DRIVER("No ATCS handle found\n");
return NULL;
out:
acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer);
DRM_DEBUG_DRIVER("Found ATCS handle %s\n", acpi_method_name);
return handle;
}
/**
* amdgpu_atif_get_notification_params - determine notify configuration
*
@ -485,14 +527,15 @@ static int amdgpu_atif_handler(struct amdgpu_device *adev,
/**
* amdgpu_atcs_call - call an ATCS method
*
* @handle: acpi handle
* @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(acpi_handle handle, int function,
static union acpi_object *amdgpu_atcs_call(struct amdgpu_atcs *atcs,
int function,
struct acpi_buffer *params)
{
acpi_status status;
@ -516,7 +559,7 @@ static union acpi_object *amdgpu_atcs_call(acpi_handle handle, int function,
atcs_arg_elements[1].integer.value = 0;
}
status = acpi_evaluate_object(handle, "ATCS", &atcs_arg, &buffer);
status = acpi_evaluate_object(atcs->handle, "ATCS", &atcs_arg, &buffer);
/* Fail only if calling the method fails and ATIF is supported */
if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
@ -550,7 +593,6 @@ static void amdgpu_atcs_parse_functions(struct amdgpu_atcs_functions *f, u32 mas
/**
* amdgpu_atcs_verify_interface - verify ATCS
*
* @handle: acpi handle
* @atcs: amdgpu atcs struct
*
* Execute the ATCS_FUNCTION_VERIFY_INTERFACE ATCS function
@ -558,15 +600,14 @@ static void amdgpu_atcs_parse_functions(struct amdgpu_atcs_functions *f, u32 mas
* (all asics).
* returns 0 on success, error on failure.
*/
static int amdgpu_atcs_verify_interface(acpi_handle handle,
struct amdgpu_atcs *atcs)
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(handle, ATCS_FUNCTION_VERIFY_INTERFACE, NULL);
info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_VERIFY_INTERFACE, NULL);
if (!info)
return -EIO;
@ -603,8 +644,10 @@ static int amdgpu_atcs_verify_interface(acpi_handle handle,
*/
bool amdgpu_acpi_is_pcie_performance_request_supported(struct amdgpu_device *adev)
{
struct amdgpu_atcs *atcs = &adev->atcs;
struct amdgpu_atcs *atcs = adev->atcs;
if (!atcs)
return false;
if (atcs->functions.pcie_perf_req && atcs->functions.pcie_dev_rdy)
return true;
@ -622,19 +665,15 @@ bool amdgpu_acpi_is_pcie_performance_request_supported(struct amdgpu_device *ade
*/
int amdgpu_acpi_pcie_notify_device_ready(struct amdgpu_device *adev)
{
acpi_handle handle;
union acpi_object *info;
struct amdgpu_atcs *atcs = &adev->atcs;
struct amdgpu_atcs *atcs = adev->atcs;
/* Get the device handle */
handle = ACPI_HANDLE(&adev->pdev->dev);
if (!handle)
if (!atcs)
return -EINVAL;
if (!atcs->functions.pcie_dev_rdy)
return -EINVAL;
info = amdgpu_atcs_call(handle, ATCS_FUNCTION_PCIE_DEVICE_READY_NOTIFICATION, NULL);
info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_PCIE_DEVICE_READY_NOTIFICATION, NULL);
if (!info)
return -EIO;
@ -657,21 +696,18 @@ int amdgpu_acpi_pcie_notify_device_ready(struct amdgpu_device *adev)
int amdgpu_acpi_pcie_performance_request(struct amdgpu_device *adev,
u8 perf_req, bool advertise)
{
acpi_handle handle;
union acpi_object *info;
struct amdgpu_atcs *atcs = &adev->atcs;
struct amdgpu_atcs *atcs = adev->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))
if (!atcs)
return -EINVAL;
/* Get the device handle */
handle = ACPI_HANDLE(&adev->pdev->dev);
if (!handle)
if (amdgpu_acpi_pcie_notify_device_ready(adev))
return -EINVAL;
if (!atcs->functions.pcie_perf_req)
@ -691,7 +727,7 @@ int amdgpu_acpi_pcie_performance_request(struct amdgpu_device *adev,
params.pointer = &atcs_input;
while (retry--) {
info = amdgpu_atcs_call(handle, ATCS_FUNCTION_PCIE_PERFORMANCE_REQUEST, &params);
info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_PCIE_PERFORMANCE_REQUEST, &params);
if (!info)
return -EIO;
@ -767,32 +803,26 @@ static int amdgpu_acpi_event(struct notifier_block *nb,
*/
int amdgpu_acpi_init(struct amdgpu_device *adev)
{
acpi_handle handle, atif_handle;
acpi_handle handle, atif_handle, atcs_handle;
struct amdgpu_atif *atif;
struct amdgpu_atcs *atcs = &adev->atcs;
int ret;
struct amdgpu_atcs *atcs;
int ret = 0;
/* Get the device handle */
handle = ACPI_HANDLE(&adev->pdev->dev);
if (!adev->bios || !handle)
return 0;
/* Call the ATCS method */
ret = amdgpu_atcs_verify_interface(handle, atcs);
if (ret) {
DRM_DEBUG_DRIVER("Call to ATCS verify_interface failed: %d\n", ret);
}
return ret;
/* Probe for ATIF, and initialize it if found */
atif_handle = amdgpu_atif_probe_handle(handle);
if (!atif_handle)
goto out;
goto atcs;
atif = kzalloc(sizeof(*atif), GFP_KERNEL);
if (!atif) {
DRM_WARN("Not enough memory to initialize ATIF\n");
goto out;
goto atcs;
}
atif->handle = atif_handle;
@ -801,7 +831,7 @@ int amdgpu_acpi_init(struct amdgpu_device *adev)
if (ret) {
DRM_DEBUG_DRIVER("Call to ATIF verify_interface failed: %d\n", ret);
kfree(atif);
goto out;
goto atcs;
}
adev->atif = atif;
@ -810,7 +840,8 @@ int amdgpu_acpi_init(struct amdgpu_device *adev)
if (amdgpu_device_has_dc_support(adev)) {
#if defined(CONFIG_DRM_AMD_DC)
struct amdgpu_display_manager *dm = &adev->dm;
atif->bd = dm->backlight_dev;
if (dm->backlight_dev)
atif->bd = dm->backlight_dev;
#endif
} else {
struct drm_encoder *tmp;
@ -862,6 +893,28 @@ int amdgpu_acpi_init(struct amdgpu_device *adev)
atif->backlight_caps.caps_valid = false;
}
atcs:
/* Probe for ATCS, and initialize it if found */
atcs_handle = amdgpu_atcs_probe_handle(handle);
if (!atcs_handle)
goto out;
atcs = kzalloc(sizeof(*atcs), GFP_KERNEL);
if (!atcs) {
DRM_WARN("Not enough memory to initialize ATCS\n");
goto out;
}
atcs->handle = atcs_handle;
/* Call the ATCS method */
ret = amdgpu_atcs_verify_interface(atcs);
if (ret) {
DRM_DEBUG_DRIVER("Call to ATCS verify_interface failed: %d\n", ret);
kfree(atcs);
goto out;
}
adev->atcs = atcs;
out:
adev->acpi_nb.notifier_call = amdgpu_acpi_event;
register_acpi_notifier(&adev->acpi_nb);
@ -892,6 +945,7 @@ void amdgpu_acpi_fini(struct amdgpu_device *adev)
{
unregister_acpi_notifier(&adev->acpi_nb);
kfree(adev->atif);
kfree(adev->atcs);
}
/**