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

[Zhou, Peng Ju]

[AMD Official Use Only]

ping

> -----Original Message-----
> From: Peng Ju Zhou <PengJu.Zhou at amd.com>
> Sent: Monday, August 9, 2021 5:37 PM
> To: amd-gfx at lists.freedesktop.org
> Cc: Zhao, Jiange <Jiange.Zhao at amd.com>; Zhou, Peng Ju
> <PengJu.Zhou at amd.com>
> Subject: [PATCH] drm/amdgpu: Add MB_REQ_MSG_READY_TO_RESET
> response when VF get FLR notification.
> 
> From: Jiange Zhao <Jiange.Zhao at amd.com>
> 
> 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 at amd.com>
> Signed-off-by: Peng Ju Zhou <PengJu.Zhou at amd.com>
> ---
>  drivers/gpu/drm/amd/amdgpu/mxgpu_nv.c | 2 ++
> drivers/gpu/drm/amd/amdgpu/mxgpu_nv.h | 3 ++-
>  2 files changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/amd/amdgpu/mxgpu_nv.c
> b/drivers/gpu/drm/amd/amdgpu/mxgpu_nv.c
> index b48e68f46a5c..a35e6d87e537 100644
> --- 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 9f5808616174..73887b0aa1d6 100644
> --- 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 {
> --
> 2.17.1