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>

2 files changed, 4 insertions, 1 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
index 7b3398c337f1..21bfa2d8039e 100644
--- 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 345fcd176992..18945dd6982d 100644
--- 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;