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drm/xe/buddy: add compatible and intersects hooks

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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: Matthew Auld <matthew.auld@intel.com>
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
This commit is contained in:
Matthew Auld 2023-03-21 11:44:07 +00:00 committed by Rodrigo Vivi
parent 793e6612de
commit ce79c6c43a
1 changed files with 62 additions and 0 deletions
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62
drivers/gpu/drm/xe/xe_ttm_vram_mgr.c
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@ -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
};