drm/radeon: do not move bo to different placement at each cs

The bo creation placement is where the bo will be. Instead of trying
to move bo at each command stream let this work to another worker
thread that will use more advance heuristic.

agd5f: remove leftover unused variable
Signed-off-by: Jerome Glisse <jglisse@redhat.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/radeon/radeon.h

@@ -318,6 +318,7 @@ struct radeon_bo {
 	struct list_head		list;
 	/* Protected by tbo.reserved */
 	u32				placements[3];
+	u32				busy_placements[3];
 	struct ttm_placement		placement;
 	struct ttm_buffer_object	tbo;
 	struct ttm_bo_kmap_obj		kmap;

drivers/gpu/drm/radeon/radeon_object.c

@@ -84,7 +84,6 @@ void radeon_ttm_placement_from_domain(struct radeon_bo *rbo, u32 domain)
 	rbo->placement.fpfn = 0;
 	rbo->placement.lpfn = 0;
 	rbo->placement.placement = rbo->placements;
-	rbo->placement.busy_placement = rbo->placements;
 	if (domain & RADEON_GEM_DOMAIN_VRAM)
 		rbo->placements[c++] = TTM_PL_FLAG_WC | TTM_PL_FLAG_UNCACHED |
 					TTM_PL_FLAG_VRAM;
@@ -105,6 +104,14 @@ void radeon_ttm_placement_from_domain(struct radeon_bo *rbo, u32 domain)
 	if (!c)
 		rbo->placements[c++] = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
 	rbo->placement.num_placement = c;
+
+	c = 0;
+	rbo->placement.busy_placement = rbo->busy_placements;
+	if (rbo->rdev->flags & RADEON_IS_AGP) {
+		rbo->busy_placements[c++] = TTM_PL_FLAG_WC | TTM_PL_FLAG_TT;
+	} else {
+		rbo->busy_placements[c++] = TTM_PL_FLAG_CACHED | TTM_PL_FLAG_TT;
+	}
 	rbo->placement.num_busy_placement = c;
 }
 
@@ -350,7 +357,6 @@ int radeon_bo_list_validate(struct list_head *head)
 {
 	struct radeon_bo_list *lobj;
 	struct radeon_bo *bo;
-	u32 domain;
 	int r;
 
 	r = ttm_eu_reserve_buffers(head);
@@ -360,17 +366,9 @@ int radeon_bo_list_validate(struct list_head *head)
 	list_for_each_entry(lobj, head, tv.head) {
 		bo = lobj->bo;
 		if (!bo->pin_count) {
-			domain = lobj->wdomain ? lobj->wdomain : lobj->rdomain;
-			
-		retry:
-			radeon_ttm_placement_from_domain(bo, domain);
 			r = ttm_bo_validate(&bo->tbo, &bo->placement,
 						true, false);
 			if (unlikely(r)) {
-				if (r != -ERESTARTSYS && domain == RADEON_GEM_DOMAIN_VRAM) {
-					domain |= RADEON_GEM_DOMAIN_GTT;
-					goto retry;
-				}
 				return r;
 			}
 		}