RFC: do we want this to become a generic interface in ttm_resource_manager_func?
RFC: would we prefer a different interface? e.g. for_each_resource_in_range or for_each_bo_in_range
Signed-off-by: Robert Beckett bob.beckett@collabora.com --- drivers/gpu/drm/ttm/ttm_range_manager.c | 21 +++++++++++++++++++++ include/drm/ttm/ttm_range_manager.h | 3 +++ 2 files changed, 24 insertions(+)
diff --git a/drivers/gpu/drm/ttm/ttm_range_manager.c b/drivers/gpu/drm/ttm/ttm_range_manager.c index 8cd4f3fb9f79..5662627bb933 100644 --- a/drivers/gpu/drm/ttm/ttm_range_manager.c +++ b/drivers/gpu/drm/ttm/ttm_range_manager.c @@ -206,3 +206,24 @@ int ttm_range_man_fini_nocheck(struct ttm_device *bdev, return 0; } EXPORT_SYMBOL(ttm_range_man_fini_nocheck); + +/** + * ttm_range_man_range_busy - Check whether anything is allocated with a range + * + * @man: memory manager to check + * @fpfn: first page number to check + * @lpfn: last page number to check + * + * Return: true if anything allocated within the range, false otherwise. + */ +bool ttm_range_man_range_busy(struct ttm_resource_manager *man, + unsigned fpfn, unsigned lpfn) +{ + struct ttm_range_manager *rman = to_range_manager(man); + struct drm_mm *mm = &rman->mm; + + if (__drm_mm_interval_first(mm, PFN_PHYS(fpfn), PFN_PHYS(lpfn + 1) - 1)) + return true; + return false; +} +EXPORT_SYMBOL(ttm_range_man_range_busy); diff --git a/include/drm/ttm/ttm_range_manager.h b/include/drm/ttm/ttm_range_manager.h index 7963b957e9ef..86794a3f9101 100644 --- a/include/drm/ttm/ttm_range_manager.h +++ b/include/drm/ttm/ttm_range_manager.h @@ -53,4 +53,7 @@ static __always_inline int ttm_range_man_fini(struct ttm_device *bdev, BUILD_BUG_ON(__builtin_constant_p(type) && type >= TTM_NUM_MEM_TYPES); return ttm_range_man_fini_nocheck(bdev, type); } + +bool ttm_range_man_range_busy(struct ttm_resource_manager *man, + unsigned fpfn, unsigned lpfn); #endif