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drm/i915: Extract checking for backing struct pages to a helper 

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 <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1466431552-17860-1-git-send-email-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2016-06-20 15:05:51 +01:00
parent 91df09d92a
commit b9bcd14a2b
2 changed files with 8 additions and 2 deletions
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6
drivers/gpu/drm/i915/i915_drv.h
View File

@ -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
*/

4
drivers/gpu/drm/i915/i915_gem.c
View File

@ -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);