drm/amdgpu: Add MB_REQ_MSG_READY_TO_RESET response when VF get FLR notification.

When guest received FLR notification from host, it would
lock adapter into reset state. There will be no more
job submission and hardware access after that.

Then it should send a response to host that it has prepared
for host reset.

Signed-off-by: Jiange Zhao <Jiange.Zhao@amd.com>
Signed-off-by: Peng Ju Zhou <PengJu.Zhou@amd.com>
Reviewed-by: Emily.Deng <Emily.Deng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/mxgpu_nv.c b/drivers/gpu/drm/amd/amdgpu/mxgpu_nv.c
index b48e68f..a35e6d8 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/mxgpu_nv.c
+++ b/drivers/gpu/drm/amd/amdgpu/mxgpu_nv.c
@@ -287,6 +287,8 @@ static void xgpu_nv_mailbox_flr_work(struct work_struct *work)
        amdgpu_virt_fini_data_exchange(adev);
        atomic_set(&adev->in_gpu_reset, 1);
 
+       xgpu_nv_mailbox_trans_msg(adev, IDH_READY_TO_RESET, 0, 0, 0);
+
        do {
                if (xgpu_nv_mailbox_peek_msg(adev) == IDH_FLR_NOTIFICATION_CMPL)
                        goto flr_done;

diff --git a/drivers/gpu/drm/amd/amdgpu/mxgpu_nv.h b/drivers/gpu/drm/amd/amdgpu/mxgpu_nv.h
index 9f58086..73887b0 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/mxgpu_nv.h
+++ b/drivers/gpu/drm/amd/amdgpu/mxgpu_nv.h
@@ -37,7 +37,8 @@ enum idh_request {
        IDH_REQ_GPU_RESET_ACCESS,
        IDH_REQ_GPU_INIT_DATA,
 
-       IDH_LOG_VF_ERROR       = 200,
+       IDH_LOG_VF_ERROR        = 200,
+       IDH_READY_TO_RESET      = 201,
 };
 
 enum idh_event {