drm/amdgpu: Move the size computations to drm buddy

- Move roundup_power_of_two() and IS_ALIGNED() computations 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.com
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Signed-off-by: Christian König <christian.koenig@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c

@@ -424,9 +424,9 @@ static int amdgpu_vram_mgr_new(struct ttm_resource_manager *man,
 			       const struct ttm_place *place,
 			       struct ttm_resource **res)
 {
-	u64 vis_usage = 0, max_bytes, cur_size, min_block_size;
 	struct amdgpu_vram_mgr *mgr = to_vram_mgr(man);
 	struct amdgpu_device *adev = to_amdgpu_device(mgr);
+	u64 vis_usage = 0, max_bytes, min_block_size;
 	struct amdgpu_vram_mgr_resource *vres;
 	u64 size, remaining_size, lpfn, fpfn;
 	struct drm_buddy *mm = &mgr->mm;
@@ -474,6 +474,9 @@ static int amdgpu_vram_mgr_new(struct ttm_resource_manager *man,
 	if (place->flags & TTM_PL_FLAG_TOPDOWN)
 		vres->flags |= DRM_BUDDY_TOPDOWN_ALLOCATION;
 
+	if (place->flags & TTM_PL_FLAG_CONTIGUOUS)
+		vres->flags |= DRM_BUDDY_CONTIGUOUS_ALLOCATION;
+
 	if (fpfn || lpfn != mgr->mm.size)
 		/* Allocate blocks in desired range */
 		vres->flags |= DRM_BUDDY_RANGE_ALLOCATION;
@@ -496,25 +499,6 @@ static int amdgpu_vram_mgr_new(struct ttm_resource_manager *man,
 				!(size & (((u64)pages_per_block << PAGE_SHIFT) - 1)))
 			min_block_size = (u64)pages_per_block << PAGE_SHIFT;
 
-		cur_size = size;
-
-		if (fpfn + size != (u64)place->lpfn << PAGE_SHIFT) {
-			/*
-			 * Except for actual range allocation, modify the size and
-			 * min_block_size conforming to continuous flag enablement
-			 */
-			if (place->flags & TTM_PL_FLAG_CONTIGUOUS) {
-				size = roundup_pow_of_two(size);
-				min_block_size = size;
-			/*
-			 * Modify the size value if size is not
-			 * aligned with min_block_size
-			 */
-			} else if (!IS_ALIGNED(size, min_block_size)) {
-				size = round_up(size, min_block_size);
-			}
-		}
-
 		r = drm_buddy_alloc_blocks(mm, fpfn,
 					   lpfn,
 					   size,
@@ -531,40 +515,6 @@ static int amdgpu_vram_mgr_new(struct ttm_resource_manager *man,
 	}
 	mutex_unlock(&mgr->lock);
 
-	if (cur_size != size) {
-		struct drm_buddy_block *block;
-		struct list_head *trim_list;
-		u64 original_size;
-		LIST_HEAD(temp);
-
-		trim_list = &vres->blocks;
-		original_size = (u64)vres->base.size;
-
-		/*
-		 * If size value is rounded up to min_block_size, trim the last
-		 * block to the required size
-		 */
-		if (!list_is_singular(&vres->blocks)) {
-			block = list_last_entry(&vres->blocks, typeof(*block), link);
-			list_move_tail(&block->link, &temp);
-			trim_list = &temp;
-			/*
-			 * Compute the original_size value by subtracting the
-			 * last block size with (aligned size - original size)
-			 */
-			original_size = amdgpu_vram_mgr_block_size(block) - (size - cur_size);
-		}
-
-		mutex_lock(&mgr->lock);
-		drm_buddy_block_trim(mm,
-				     original_size,
-				     trim_list);
-		mutex_unlock(&mgr->lock);
-
-		if (!list_empty(&temp))
-			list_splice_tail(trim_list, &vres->blocks);
-	}
-
 	vres->base.start = 0;
 	list_for_each_entry(block, &vres->blocks, link) {
 		unsigned long start;