From 91b5900507871c735a99842ebfe959dd33a66690 Mon Sep 17 00:00:00 2001 From: Oak Zeng Date: Wed, 5 Aug 2020 10:53:09 -0500 Subject: [PATCH] drm/amdgpu: Add comment to function amdgpu_ttm_alloc_gart Add comments to refect what function does Signed-off-by: Oak Zeng Reviewed-by: Christian Konig Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c index a18dc87..257a1ba 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c @@ -1155,7 +1155,12 @@ static int amdgpu_ttm_backend_bind(struct ttm_tt *ttm, } /** - * amdgpu_ttm_alloc_gart - Allocate GART memory for buffer object + * amdgpu_ttm_alloc_gart - Make sure buffer object is accessible either + * through AGP or GART aperture. + * + * If bo is accessible through AGP aperture, then use AGP aperture + * to access bo; otherwise allocate logical space in GART aperture + * and map bo to GART aperture. */ int amdgpu_ttm_alloc_gart(struct ttm_buffer_object *bo) { -- 2.7.4