[PATCH 02/12] drm/amdgpu: Enable SDMA_CNTL.ATC_L1_ENABLE for SDMA on CZ

[Alex Deucher]

On Mon, Jul 3, 2017 at 5:11 PM, Felix Kuehling <Felix.Kuehling at amd.com> wrote:
> From: shaoyunl <Shaoyun.Liu at amd.com>
>
> For GFX context, the  ATC bit in SDMA*_GFX_VIRTUAL_ADDRESS  can be cleared
> to perform in VM mode. For RLC context, to support ATC mode , ATC bit in
> SDMA*_RLC*_VIRTUAL_ADDRESS should be set. SDMA_CNTL.ATC_L1_ENABLE bit is
> global setting that enables the  L1-L2 translation for ATC address.
>
> Signed-off-by: shaoyun liu <shaoyun.liu at amd.com>
> Reviewed-by: Felix Kuehling <Felix.Kuehling at amd.com>

Acked-by: Alex Deucher <alexander.deucher at amd.com>

> ---
>  drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c | 10 ++++++++--
>  1 file changed, 8 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c b/drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c
> index 1d766ae..67a29fb 100644
> --- a/drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c
> +++ b/drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c
> @@ -556,12 +556,18 @@ static void sdma_v3_0_ctx_switch_enable(struct amdgpu_device *adev, bool enable)
>
>         for (i = 0; i < adev->sdma.num_instances; i++) {
>                 f32_cntl = RREG32(mmSDMA0_CNTL + sdma_offsets[i]);
> -               if (enable)
> +               if (enable) {
>                         f32_cntl = REG_SET_FIELD(f32_cntl, SDMA0_CNTL,
>                                         AUTO_CTXSW_ENABLE, 1);
> -               else
> +                       f32_cntl = REG_SET_FIELD(f32_cntl, SDMA0_CNTL,
> +                                       ATC_L1_ENABLE, 1);
> +               } else {
>                         f32_cntl = REG_SET_FIELD(f32_cntl, SDMA0_CNTL,
>                                         AUTO_CTXSW_ENABLE, 0);
> +                       f32_cntl = REG_SET_FIELD(f32_cntl, SDMA0_CNTL,
> +                                       ATC_L1_ENABLE, 1);
> +               }
> +
>                 WREG32(mmSDMA0_CNTL + sdma_offsets[i], f32_cntl);
>         }
>  }
> --
> 1.9.1
>
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