[PATCH v2] drm/amdgpu: Set the default value about gds vmid0 size

[Zhang, Jerry(Junwei)]

On 10/12/2018 05:34 PM, Emily Deng wrote:
> For sriov, when first run windows guest, then run linux guest, the gds
> vmid0 size will be reset to 0 by windows guest. So if the value has been
> reset to 0, then set the value to the default value in linux guest.
>
> v2:
> Fixed value instead of reading mmGDS_VMID0_SIZE.
>
> Signed-off-by: Emily Deng <Emily.Deng at amd.com>
> ---
>   drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c | 14 +++++++++++++-
>   1 file changed, 13 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
> index e61f6a3..38a2ecc 100644
> --- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
> +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
> @@ -4904,7 +4904,19 @@ static void gfx_v9_0_set_rlc_funcs(struct amdgpu_device *adev)
>   static void gfx_v9_0_set_gds_init(struct amdgpu_device *adev)
>   {
>   	/* init asci gds info */
> -	adev->gds.mem.total_size = RREG32_SOC15(GC, 0, mmGDS_VMID0_SIZE);
> +	switch (adev->asic_type) {
> +	case CHIP_VEGA10:
> +	case CHIP_VEGA12:
> +	case CHIP_VEGA20:
> +		adev->gds.mem.total_size = 0x10000;
> +		break;
> +	case CHIP_RAVEN:
> +		adev->gds.mem.total_size = 0x1000;
> +		break;
> +	default:
Better to show some info here in case that new card goes here with 0 
size unexpectedly.
or set default value as 0x10000.

Jerry
> +		break;
> +	}
> +
>   	adev->gds.gws.total_size = 64;
>   	adev->gds.oa.total_size = 16;
>