drm/amdgpu: reduce the number of placements for a BO

Make struct amdgpu_bo a bit smaller.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
index 7b3398c..21bfa2d 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
@@ -216,6 +216,8 @@ void amdgpu_bo_placement_from_domain(struct amdgpu_bo *abo, u32 domain)
                c++;
        }
 
+       BUG_ON(c >= AMDGPU_BO_MAX_PLACEMENTS);
+
        placement->num_placement = c;
        placement->placement = places;
 

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
index 345fcd1..18945dd 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
@@ -32,6 +32,7 @@
 #include "amdgpu.h"
 
 #define AMDGPU_BO_INVALID_OFFSET       LONG_MAX
+#define AMDGPU_BO_MAX_PLACEMENTS       3
 
 struct amdgpu_bo_param {
        unsigned long                   size;
@@ -77,7 +78,7 @@ struct amdgpu_bo {
        /* Protected by tbo.reserved */
        u32                             preferred_domains;
        u32                             allowed_domains;
-       struct ttm_place                placements[AMDGPU_GEM_DOMAIN_MAX + 1];
+       struct ttm_place                placements[AMDGPU_BO_MAX_PLACEMENTS];
        struct ttm_placement            placement;
        struct ttm_buffer_object        tbo;
        struct ttm_bo_kmap_obj          kmap;