From ce79c6c43af7280c1f26d700959d04a7e62092af Mon Sep 17 00:00:00 2001 From: Matthew Auld Date: Tue, 21 Mar 2023 11:44:07 +0000 Subject: 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: Matthew Auld Cc: Lucas De Marchi Reviewed-by: Maarten Lankhorst Reviewed-by: Gwan-gyeong Mun Signed-off-by: Rodrigo Vivi --- drivers/gpu/drm/xe/xe_ttm_vram_mgr.c | 62 ++++++++++++++++++++++++++++++++++++ 1 file changed, 62 insertions(+) (limited to 'drivers/gpu/drm/xe/xe_ttm_vram_mgr.c') diff --git a/drivers/gpu/drm/xe/xe_ttm_vram_mgr.c b/drivers/gpu/drm/xe/xe_ttm_vram_mgr.c index 78979c0b6024..73836b9b7fed 100644 --- a/drivers/gpu/drm/xe/xe_ttm_vram_mgr.c +++ b/drivers/gpu/drm/xe/xe_ttm_vram_mgr.c @@ -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 }; -- cgit v1.2.3