[PATCH] drm/amdgpu: disable page queue on Vega10 SR-IOV VF

[Zhang, Jerry(Junwei)]

On 11/7/18 1:15 PM, Trigger Huang wrote:
> Currently, SDMA page queue is not used under SR-IOV VF, and this queue will
> cause ring test failure in amdgpu module reload case. So just disable it.
>
> Signed-off-by: Trigger Huang <Trigger.Huang at amd.com>

Looks we ran into several issues about it on vega.
kfd also disabled vega10 for development.(but not sure the detail issue 
for them)

Thus, we may disable it for vega10 as well?
any comment? Alex, Christian, Flex.

Regards,
Jerry
> ---
>   drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c | 4 +++-
>   1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c b/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
> index e39a09eb0f..4edc848 100644
> --- a/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
> +++ b/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
> @@ -1451,7 +1451,9 @@ static int sdma_v4_0_early_init(void *handle)
>   		adev->sdma.has_page_queue = false;
>   	} else {
>   		adev->sdma.num_instances = 2;
> -		if (adev->asic_type != CHIP_VEGA20 &&
> +		if ((adev->asic_type == CHIP_VEGA10) && amdgpu_sriov_vf((adev)))
> +			adev->sdma.has_page_queue = false;
> +		else if (adev->asic_type != CHIP_VEGA20 &&
>   				adev->asic_type != CHIP_VEGA12)
>   			adev->sdma.has_page_queue = true;
>   	}