RFC: should this become a generic interface in intel_memory_region_ops?

RFC: would we prefer an different interface? e.g. for_each_obj_in_range

Signed-off-by: Robert Beckett bob.beckett@collabora.com --- drivers/gpu/drm/i915/intel_region_ttm.c | 19 +++++++++++++++++++ drivers/gpu/drm/i915/intel_region_ttm.h | 3 +++ 2 files changed, 22 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_region_ttm.c b/drivers/gpu/drm/i915/intel_region_ttm.c index bb564b830c96..2ccefa76348f 100644 --- a/drivers/gpu/drm/i915/intel_region_ttm.c +++ b/drivers/gpu/drm/i915/intel_region_ttm.c @@ -256,3 +256,22 @@ void intel_region_ttm_resource_free(struct intel_memory_region *mem,

man->func->free(man, res); } + +/** + * intel_region_ttm_range_busy - check whether range has any allocations + * @mem: The region to check + * @start: the start of the range to check + * @end: the end of the range to check + * + * Return: true if something is alloceted within the region, false otherwise. + */ +bool intel_region_ttm_range_busy(struct intel_memory_region *mem, + u64 start, u64 end) +{ + struct ttm_resource_manager *man = mem->region_private; + + /* currently only supported for range allocator */ + GEM_BUG_ON(!mem->is_range_manager); + + return ttm_range_man_range_busy(man, PFN_DOWN(start), PFN_UP(end)); +} diff --git a/drivers/gpu/drm/i915/intel_region_ttm.h b/drivers/gpu/drm/i915/intel_region_ttm.h index fdee5e7bd46c..670ba9b618f7 100644 --- a/drivers/gpu/drm/i915/intel_region_ttm.h +++ b/drivers/gpu/drm/i915/intel_region_ttm.h @@ -29,6 +29,9 @@ intel_region_ttm_resource_to_rsgt(struct intel_memory_region *mem, void intel_region_ttm_resource_free(struct intel_memory_region *mem, struct ttm_resource *res);

+bool intel_region_ttm_range_busy(struct intel_memory_region *mem, + u64 start, u64 end); + int intel_region_to_ttm_type(const struct intel_memory_region *mem);

struct ttm_device_funcs *i915_ttm_driver(void);