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

[Deng, Emily]

Reviewed-by: Emily.Deng <Emily.Deng at amd.com>

>-----Original Message-----
>From: amd-gfx <amd-gfx-bounces at lists.freedesktop.org> On Behalf Of Zhou,
>Peng Ju
>Sent: Thursday, August 12, 2021 4:28 PM
>To: Zhou, Peng Ju <PengJu.Zhou at amd.com>; amd-gfx at lists.freedesktop.org
>Cc: Zhao, Jiange <Jiange.Zhao at amd.com>
>Subject: RE: [PATCH] drm/amdgpu: Add MB_REQ_MSG_READY_TO_RESET
>response when VF get FLR notification.
>
>[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
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