drm/i915: Move the size computations to drm buddy

- Move roundup_power_of_two() to drm buddy file to support
  the new try harder mechanism for contiguous allocation.

- Move trim function call to drm_buddy_alloc_blocks() function.
Signed-off-by: Arunpravin Paneer Selvam <Arunpravin.PaneerSelvam@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230909160902.15644-2-Arunpravin.PaneerSelvam@amd.comReviewed-by: Matthew Auld <matthew.auld@intel.com>
Signed-off-by: Christian König <christian.koenig@amd.com>

drivers/gpu/drm/i915/i915_ttm_buddy_manager.c

@@ -59,6 +59,9 @@ static int i915_ttm_buddy_man_alloc(struct ttm_resource_manager *man,
 	if (place->flags & TTM_PL_FLAG_TOPDOWN)
 		bman_res->flags |= DRM_BUDDY_TOPDOWN_ALLOCATION;
 
+	if (place->flags & TTM_PL_FLAG_CONTIGUOUS)
+		bman_res->flags |= DRM_BUDDY_CONTIGUOUS_ALLOCATION;
+
 	if (place->fpfn || lpfn != man->size)
 		bman_res->flags |= DRM_BUDDY_RANGE_ALLOCATION;
 
@@ -72,18 +75,6 @@ static int i915_ttm_buddy_man_alloc(struct ttm_resource_manager *man,
 	GEM_BUG_ON(min_page_size < mm->chunk_size);
 	GEM_BUG_ON(!IS_ALIGNED(size, min_page_size));
 
-	if (place->fpfn + PFN_UP(bman_res->base.size) != place->lpfn &&
-	    place->flags & TTM_PL_FLAG_CONTIGUOUS) {
-		unsigned long pages;
-
-		size = roundup_pow_of_two(size);
-		min_page_size = size;
-
-		pages = size >> ilog2(mm->chunk_size);
-		if (pages > lpfn)
-			lpfn = pages;
-	}
-
 	if (size > lpfn << PAGE_SHIFT) {
 		err = -E2BIG;
 		goto err_free_res;
@@ -107,14 +98,6 @@ static int i915_ttm_buddy_man_alloc(struct ttm_resource_manager *man,
 	if (unlikely(err))
 		goto err_free_blocks;
 
-	if (place->flags & TTM_PL_FLAG_CONTIGUOUS) {
-		u64 original_size = (u64)bman_res->base.size;
-
-		drm_buddy_block_trim(mm,
-				     original_size,
-				     &bman_res->blocks);
-	}
-
 	if (lpfn <= bman->visible_size) {
 		bman_res->used_visible_size = PFN_UP(bman_res->base.size);
 	} else {