Commit ce79c6c4 authored by Matthew Auld's avatar Matthew Auld Committed by Rodrigo Vivi
Browse files

drm/xe/buddy: add compatible and intersects hooks 



Copy this from i915. We need .compatible for vram -> vram transfers, so
they don't just get nooped by ttm, if need to move something from
mappable to non-mappble or vice versa. The .intersects is needed for
eviction, to determine if a victim resource is worth eviction. e.g if we
need mappable space there is no point in evicting a resource that has
zero mappable pages.

Signed-off-by: default avatarMatthew Auld <matthew.auld@intel.com>
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: default avatarMaarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: default avatarGwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Signed-off-by: default avatarRodrigo Vivi <rodrigo.vivi@intel.com>
parent 793e6612

drivers/gpu/drm/xe/xe_ttm_vram_mgr.c

+62 −0
Original line number Diff line number Diff line
@@ -242,9 +242,71 @@ static void xe_ttm_vram_mgr_debug(struct ttm_resource_manager *man, 
	drm_printf(printer, "man size:%llu\n", man->size);

}



static bool xe_ttm_vram_mgr_intersects(struct ttm_resource_manager *man,

				       struct ttm_resource *res,

				       const struct ttm_place *place,

				       size_t size)

{

	struct xe_ttm_vram_mgr *mgr = to_xe_ttm_vram_mgr(man);

	struct xe_ttm_vram_mgr_resource *vres =

		to_xe_ttm_vram_mgr_resource(res);

	struct drm_buddy *mm = &mgr->mm;

	struct drm_buddy_block *block;



	if (!place->fpfn && !place->lpfn)

		return true;



	if (!place->fpfn && place->lpfn == mgr->visible_size >> PAGE_SHIFT)

		return vres->used_visible_size > 0;



	list_for_each_entry(block, &vres->blocks, link) {

		unsigned long fpfn =

			drm_buddy_block_offset(block) >> PAGE_SHIFT;

		unsigned long lpfn = fpfn +

			(drm_buddy_block_size(mm, block) >> PAGE_SHIFT);



		if (place->fpfn < lpfn && place->lpfn > fpfn)

			return true;

	}



	return false;

}



static bool xe_ttm_vram_mgr_compatible(struct ttm_resource_manager *man,

				       struct ttm_resource *res,

				       const struct ttm_place *place,

				       size_t size)

{

	struct xe_ttm_vram_mgr *mgr = to_xe_ttm_vram_mgr(man);

	struct xe_ttm_vram_mgr_resource *vres =

		to_xe_ttm_vram_mgr_resource(res);

	struct drm_buddy *mm = &mgr->mm;

	struct drm_buddy_block *block;



	if (!place->fpfn && !place->lpfn)

		return true;



	if (!place->fpfn && place->lpfn == mgr->visible_size >> PAGE_SHIFT)

		return vres->used_visible_size == size;



	list_for_each_entry(block, &vres->blocks, link) {

		unsigned long fpfn =

			drm_buddy_block_offset(block) >> PAGE_SHIFT;

		unsigned long lpfn = fpfn +

			(drm_buddy_block_size(mm, block) >> PAGE_SHIFT);



		if (fpfn < place->fpfn || lpfn > place->lpfn)

			return false;

	}



	return true;

}



static const struct ttm_resource_manager_func xe_ttm_vram_mgr_func = {

	.alloc	= xe_ttm_vram_mgr_new,

	.free	= xe_ttm_vram_mgr_del,

	.intersects = xe_ttm_vram_mgr_intersects,

	.compatible = xe_ttm_vram_mgr_compatible,

	.debug	= xe_ttm_vram_mgr_debug

};