drm/amdgpu: Implement unrecoverable error message handling for VFs

This notification may arrive in VF mailbox while polling for response from
another event.

This patches covers the following scenarios:

- If VF is already in RMA state, then do not attempt to contact the host.
  Host will ignore the VF after sending the notification.

- If the notification is detected during polling, then set the RMA status,
  and return error to caller.

- If the notification arrives by interrupt, then set the RMA status and
  queue a reset.  This reset will fail and VF will stop runtime services.

Reviewed-by: Shravan Kumar Gande <Shravankumar.Gande@amd.com>
Signed-off-by: Victor Skvortsov <victor.skvortsov@amd.com>
Signed-off-by: Ellen Pan <yunru.pan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_device.c

@@ -6150,6 +6150,11 @@ retry:	/* Rest of adevs pre asic reset from XGMI hive. */
 	/* Actual ASIC resets if needed.*/
 	/* Host driver will handle XGMI hive reset for SRIOV */
 	if (amdgpu_sriov_vf(adev)) {
+
+		/* Bail out of reset early */
+		if (amdgpu_ras_is_rma(adev))
+			return -ENODEV;
+
 		if (amdgpu_ras_get_fed_status(adev) || amdgpu_virt_rcvd_ras_interrupt(adev)) {
 			dev_dbg(adev->dev, "Detected RAS error, wait for FLR completion\n");
 			amdgpu_ras_set_fed(adev, true);