drm/amdgpu: Add support for CPERs on virtualization

Add support for CPERs on VFs.

VFs do not receive PMFW messages directly; as such, they need to
query them from the host. To avoid hitting host event guard,
CPER queries need to be rate limited. CPER queries share the same
RAS telemetry buffer as error count query, so a mutex protecting
the shared buffer was added as well.

For readability, the amdgpu_detect_virtualization was refactored
into multiple individual functions.

Signed-off-by: Tony Yi <[email protected]>
Reviewed-by: Tao Zhou <[email protected]>
Reviewed-by: Hawking Zhang <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>

1 files changed, 3 insertions, 4 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 7b60646c6ad2..a755cc545c91 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -3099,7 +3099,8 @@ static int amdgpu_device_ip_init(struct amdgpu_device *adev)
 
 	amdgpu_fru_get_product_info(adev);
 
-	r = amdgpu_cper_init(adev);
+	if (!amdgpu_sriov_vf(adev) || amdgpu_sriov_ras_cper_en(adev))
+		r = amdgpu_cper_init(adev);
 
 init_failed:
 
@@ -4333,10 +4334,8 @@ int amdgpu_device_init(struct amdgpu_device *adev,
 	 * for throttling interrupt) = 60 seconds.
 	 */
 	ratelimit_state_init(&adev->throttling_logging_rs, (60 - 1) * HZ, 1);
-	ratelimit_state_init(&adev->virt.ras_telemetry_rs, 5 * HZ, 1);
 
 	ratelimit_set_flags(&adev->throttling_logging_rs, RATELIMIT_MSG_ON_RELEASE);
-	ratelimit_set_flags(&adev->virt.ras_telemetry_rs, RATELIMIT_MSG_ON_RELEASE);
 
 	/* Registers mapping */
 	/* TODO: block userspace mapping of io register */
@@ -4368,7 +4367,7 @@ int amdgpu_device_init(struct amdgpu_device *adev,
 		return -ENOMEM;
 
 	/* detect hw virtualization here */
-	amdgpu_detect_virtualization(adev);
+	amdgpu_virt_init(adev);
 
 	amdgpu_device_get_pcie_info(adev);