diff options
Diffstat (limited to 'drivers/gpu/drm/i915/gem/i915_gem_object_frontbuffer.h')
| -rw-r--r-- | drivers/gpu/drm/i915/gem/i915_gem_object_frontbuffer.h | 54 |
1 files changed, 18 insertions, 36 deletions
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object_frontbuffer.h b/drivers/gpu/drm/i915/gem/i915_gem_object_frontbuffer.h index b682969e3a29..2133e29047c5 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_object_frontbuffer.h +++ b/drivers/gpu/drm/i915/gem/i915_gem_object_frontbuffer.h @@ -12,6 +12,14 @@ #include "display/intel_frontbuffer.h" #include "i915_gem_object_types.h" +struct i915_frontbuffer { + struct intel_frontbuffer base; + struct drm_i915_gem_object *obj; + struct i915_active write; + struct rcu_head rcu; + struct kref ref; +}; + void __i915_gem_object_flush_frontbuffer(struct drm_i915_gem_object *obj, enum fb_op_origin origin); void __i915_gem_object_invalidate_frontbuffer(struct drm_i915_gem_object *obj, @@ -33,19 +41,23 @@ i915_gem_object_invalidate_frontbuffer(struct drm_i915_gem_object *obj, __i915_gem_object_invalidate_frontbuffer(obj, origin); } +struct i915_frontbuffer *i915_gem_object_frontbuffer_get(struct drm_i915_gem_object *obj); +void i915_gem_object_frontbuffer_ref(struct i915_frontbuffer *front); +void i915_gem_object_frontbuffer_put(struct i915_frontbuffer *front); + /** - * i915_gem_object_get_frontbuffer - Get the object's frontbuffer - * @obj: The object whose frontbuffer to get. + * i915_gem_object_frontbuffer_lookup - Look up the object's frontbuffer + * @obj: The object whose frontbuffer to look up. * * Get pointer to object's frontbuffer if such exists. Please note that RCU * mechanism is used to handle e.g. ongoing removal of frontbuffer pointer. * * Return: pointer to object's frontbuffer is such exists or NULL */ -static inline struct intel_frontbuffer * -i915_gem_object_get_frontbuffer(const struct drm_i915_gem_object *obj) +static inline struct i915_frontbuffer * +i915_gem_object_frontbuffer_lookup(const struct drm_i915_gem_object *obj) { - struct intel_frontbuffer *front; + struct i915_frontbuffer *front; if (likely(!rcu_access_pointer(obj->frontbuffer))) return NULL; @@ -62,41 +74,11 @@ i915_gem_object_get_frontbuffer(const struct drm_i915_gem_object *obj) if (likely(front == rcu_access_pointer(obj->frontbuffer))) break; - intel_frontbuffer_put(front); + i915_gem_object_frontbuffer_put(front); } while (1); rcu_read_unlock(); return front; } -/** - * i915_gem_object_set_frontbuffer - Set the object's frontbuffer - * @obj: The object whose frontbuffer to set. - * @front: The frontbuffer to set - * - * Set object's frontbuffer pointer. If frontbuffer is already set for the - * object keep it and return it's pointer to the caller. Please note that RCU - * mechanism is used to handle e.g. ongoing removal of frontbuffer pointer. This - * function is protected by i915->display->fb_tracking.lock - * - * Return: pointer to frontbuffer which was set. - */ -static inline struct intel_frontbuffer * -i915_gem_object_set_frontbuffer(struct drm_i915_gem_object *obj, - struct intel_frontbuffer *front) -{ - struct intel_frontbuffer *cur = front; - - if (!front) { - RCU_INIT_POINTER(obj->frontbuffer, NULL); - } else if (rcu_access_pointer(obj->frontbuffer)) { - cur = rcu_dereference_protected(obj->frontbuffer, true); - kref_get(&cur->ref); - } else { - rcu_assign_pointer(obj->frontbuffer, front); - } - - return cur; -} - #endif |