[PATCH 10/11] drm/amdgpu: setup GTT size directly from module parameter

[Alex Deucher]

On Mon, Jul 3, 2017 at 5:44 AM, Christian König <deathsimple at vodafone.de> wrote:
> From: Christian König <christian.koenig at amd.com>
>
> Instead of relying on the sysvm_size to be the same as the module parameter.
>
> Signed-off-by: Christian König <christian.koenig at amd.com>

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

> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 12 +++++++++---
>  1 file changed, 9 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> index 9240357..72dd83e 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> @@ -1097,6 +1097,7 @@ static struct ttm_bo_driver amdgpu_bo_driver = {
>
>  int amdgpu_ttm_init(struct amdgpu_device *adev)
>  {
> +       uint64_t gtt_size;
>         int r;
>
>         r = amdgpu_ttm_global_init(adev);
> @@ -1143,14 +1144,19 @@ int amdgpu_ttm_init(struct amdgpu_device *adev)
>         }
>         DRM_INFO("amdgpu: %uM of VRAM memory ready\n",
>                  (unsigned) (adev->mc.real_vram_size / (1024 * 1024)));
> -       r = ttm_bo_init_mm(&adev->mman.bdev, TTM_PL_TT,
> -                               adev->mc.sysvm_size >> PAGE_SHIFT);
> +
> +       if (amdgpu_gart_size == -1)
> +               gtt_size = max((AMDGPU_DEFAULT_GTT_SIZE_MB << 20),
> +                              adev->mc.mc_vram_size);
> +       else
> +               gtt_size = (uint64_t)amdgpu_gart_size << 20;
> +       r = ttm_bo_init_mm(&adev->mman.bdev, TTM_PL_TT, gtt_size >> PAGE_SHIFT);
>         if (r) {
>                 DRM_ERROR("Failed initializing GTT heap.\n");
>                 return r;
>         }
>         DRM_INFO("amdgpu: %uM of GTT memory ready.\n",
> -                (unsigned)(adev->mc.sysvm_size / (1024 * 1024)));
> +                (unsigned)(gtt_size / (1024 * 1024)));
>
>         adev->gds.mem.total_size = adev->gds.mem.total_size << AMDGPU_GDS_SHIFT;
>         adev->gds.mem.gfx_partition_size = adev->gds.mem.gfx_partition_size << AMDGPU_GDS_SHIFT;
> --
> 2.7.4
>
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