linux/drivers/gpu/drm/i915/gem/i915_gem_object_frontbuffer.h

/* SPDX-License-Identifier: MIT */
/*
 * Copyright © 2023 Intel Corporation
 */

#ifndef __I915_GEM_OBJECT_FRONTBUFFER_H__
#define __I915_GEM_OBJECT_FRONTBUFFER_H__

#include <linux/kref.h>
#include <linux/rcupdate.h>

#include "display/intel_frontbuffer.h"
#include "i915_gem_object_types.h"

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,
					      enum fb_op_origin origin);

static inline void
i915_gem_object_flush_frontbuffer(struct drm_i915_gem_object *obj,
				  enum fb_op_origin origin)
{ … }

static inline void
i915_gem_object_invalidate_frontbuffer(struct drm_i915_gem_object *obj,
				       enum fb_op_origin origin)
{ … }

/**
 * i915_gem_object_get_frontbuffer - Get the object's frontbuffer
 * @obj: The object whose frontbuffer to get.
 *
 * 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)
{ … }

/**
 * 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)
{ … }

#endif