On Fri, Jun 30, 2017 at 7:22 AM, Christian König
<deathsim...@vodafone.de> wrote:
> From: Christian König <christian.koe...@amd.com>
>
> We want to use them as remap address space.
>
> Signed-off-by: Christian König <christian.koe...@amd.com>
> ---
> drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c | 5 ++++-
> drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h | 3 +++
> 2 files changed, 7 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c
> index 6fdf83a..a0976dc 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c
> @@ -43,12 +43,15 @@ static int amdgpu_gtt_mgr_init(struct
> ttm_mem_type_manager *man,
> unsigned long p_size)
> {
> struct amdgpu_gtt_mgr *mgr;
> + uint64_t start, size;
>
> mgr = kzalloc(sizeof(*mgr), GFP_KERNEL);
> if (!mgr)
> return -ENOMEM;
>
> - drm_mm_init(&mgr->mm, 0, p_size);
> + start = AMDGPU_GTT_MAX_TRANSFER_SIZE *
> AMDGPU_GTT_NUM_TRANSFER_WINDOWS;
> + size = p_size - start;
> + drm_mm_init(&mgr->mm, start, size);
> spin_lock_init(&mgr->lock);
> mgr->available = p_size;
> man->priv = mgr;
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
> index 2ade5c5..9c4da0a 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
> @@ -34,6 +34,9 @@
> #define AMDGPU_PL_FLAG_GWS (TTM_PL_FLAG_PRIV << 1)
> #define AMDGPU_PL_FLAG_OA (TTM_PL_FLAG_PRIV << 2)
>
> +#define AMDGPU_GTT_MAX_TRANSFER_SIZE 512
Maybe AMDGPU_GTT_MAX_TRANSFER_SIZE_PAGES? Also you may want to update
the patch title to say 2x512 pages rather than 2x2MB.
> +#define AMDGPU_GTT_NUM_TRANSFER_WINDOWS 2
> +
> struct amdgpu_mman {
> struct ttm_bo_global_ref bo_global_ref;
> struct drm_global_reference mem_global_ref;
> --
> 2.7.4
>
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