Currently to see if an object is backed by struct pages (as opposed to being a simple pointer to stolen memory, for example) we do a manual check on the obj->ops->flags. This is quite shouty and before adding more checks in future, we should make it a bit calmer.
Signed-off-by: Chris Wilson <[email protected]> --- drivers/gpu/drm/i915/i915_drv.h | 6 ++++++ drivers/gpu/drm/i915/i915_gem.c | 4 ++-- 2 files changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 25ebe4660764..48928227bdcc 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -2266,6 +2266,12 @@ struct drm_i915_gem_object { }; #define to_intel_bo(x) container_of(x, struct drm_i915_gem_object, base) +static inline bool +i915_gem_object_has_struct_page(const struct drm_i915_gem_object *obj) +{ + return obj->ops->flags & I915_GEM_OBJECT_HAS_STRUCT_PAGE; +} + /* * Optimised SGL iterator for GEM objects */ diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 21d0dea57312..7f6879cc82fb 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -508,7 +508,7 @@ int i915_gem_obj_prepare_shmem_read(struct drm_i915_gem_object *obj, *needs_clflush = 0; - if (WARN_ON((obj->ops->flags & I915_GEM_OBJECT_HAS_STRUCT_PAGE) == 0)) + if (WARN_ON(!i915_gem_object_has_struct_page(obj))) return -EINVAL; if (!(obj->base.read_domains & I915_GEM_DOMAIN_CPU)) { @@ -5528,7 +5528,7 @@ i915_gem_object_get_dirty_page(struct drm_i915_gem_object *obj, int n) struct page *page; /* Only default objects have per-page dirty tracking */ - if (WARN_ON((obj->ops->flags & I915_GEM_OBJECT_HAS_STRUCT_PAGE) == 0)) + if (WARN_ON(!i915_gem_object_has_struct_page(obj))) return NULL; page = i915_gem_object_get_page(obj, n); -- 2.8.1 _______________________________________________ Intel-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/intel-gfx
