[PATCH 01/11] drm/amdgpu: remove extra root PD alignment

[Alex Deucher]

On Wed, Aug 22, 2018 at 11:05 AM Christian König
<ckoenig.leichtzumerken at gmail.com> wrote:
>
> Just another leftover from radeon.

I can't remember exactly what chip this was for.  Are you sure this
isn't still required for SI or something like that?

Alex

>
> Signed-off-by: Christian König <christian.koenig at amd.com>
> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 4 +---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h | 3 ---
>  2 files changed, 1 insertion(+), 6 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
> index 662aec5c81d4..73b8dcaf66e6 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
> @@ -2566,8 +2566,6 @@ int amdgpu_vm_init(struct amdgpu_device *adev, struct amdgpu_vm *vm,
>  {
>         struct amdgpu_bo_param bp;
>         struct amdgpu_bo *root;
> -       const unsigned align = min(AMDGPU_VM_PTB_ALIGN_SIZE,
> -               AMDGPU_VM_PTE_COUNT(adev) * 8);
>         unsigned long size;
>         uint64_t flags;
>         int r, i;
> @@ -2615,7 +2613,7 @@ int amdgpu_vm_init(struct amdgpu_device *adev, struct amdgpu_vm *vm,
>         size = amdgpu_vm_bo_size(adev, adev->vm_manager.root_level);
>         memset(&bp, 0, sizeof(bp));
>         bp.size = size;
> -       bp.byte_align = align;
> +       bp.byte_align = AMDGPU_GPU_PAGE_SIZE;
>         bp.domain = AMDGPU_GEM_DOMAIN_VRAM;
>         bp.flags = flags;
>         bp.type = ttm_bo_type_kernel;
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
> index 1162c2bf3138..1c9049feaaea 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
> @@ -48,9 +48,6 @@ struct amdgpu_bo_list_entry;
>  /* number of entries in page table */
>  #define AMDGPU_VM_PTE_COUNT(adev) (1 << (adev)->vm_manager.block_size)
>
> -/* PTBs (Page Table Blocks) need to be aligned to 32K */
> -#define AMDGPU_VM_PTB_ALIGN_SIZE   32768
> -
>  #define AMDGPU_PTE_VALID       (1ULL << 0)
>  #define AMDGPU_PTE_SYSTEM      (1ULL << 1)
>  #define AMDGPU_PTE_SNOOPED     (1ULL << 2)
> --
> 2.17.1
>
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