drm/amdgpu: use explicit GTT limit for evictions

This way the address space gets allocated immediately.

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>

1 files changed, 18 insertions, 2 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index 8aa3fe6c270c..3daf85897d7c 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -201,6 +201,7 @@ static void amdgpu_evict_flags(struct ttm_buffer_object *bo,
                 .lpfn = 0,
                 .flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM
         };
+        unsigned i;
 
         if (!amdgpu_ttm_bo_is_amdgpu_bo(bo)) {
                 placement->placement = &placements;
@@ -212,10 +213,25 @@ static void amdgpu_evict_flags(struct ttm_buffer_object *bo,
         rbo = container_of(bo, struct amdgpu_bo, tbo);
         switch (bo->mem.mem_type) {
         case TTM_PL_VRAM:
-                if (rbo->adev->mman.buffer_funcs_ring->ready == false)
+                if (rbo->adev->mman.buffer_funcs_ring->ready == false) {
                         amdgpu_ttm_placement_from_domain(rbo, AMDGPU_GEM_DOMAIN_CPU);
-                else
+                } else {
                         amdgpu_ttm_placement_from_domain(rbo, AMDGPU_GEM_DOMAIN_GTT);
+                        for (i = 0; i < rbo->placement.num_placement; ++i) {
+                                if (!(rbo->placements[i].flags &
+                                      TTM_PL_FLAG_TT))
+                                        continue;
+
+                                if (rbo->placements[i].lpfn)
+                                        continue;
+
+                                /* set an upper limit to force directly
+                                 * allocating address space for the BO.
+                                 */
+                                rbo->placements[i].lpfn =
+                                        rbo->adev->mc.gtt_size >> PAGE_SHIFT;
+                        }
+                }
                 break;
         case TTM_PL_TT:
         default: