1/* SPDX-License-Identifier: GPL-2.0-only */
 2/**************************************************************************
 3 * Copyright (c) 2007-2008, Intel Corporation.
 4 * All Rights Reserved.
 5 *
 6 **************************************************************************/
 7
 8#ifndef _PSB_GTT_H_
 9#define _PSB_GTT_H_
10
11#include <drm/drm_gem.h>
12
13/* This wants cleaning up with respect to the psb_dev and un-needed stuff */
14struct psb_gtt {
15	uint32_t gatt_start;
16	uint32_t mmu_gatt_start;
17	uint32_t gtt_start;
18	uint32_t gtt_phys_start;
19	unsigned gtt_pages;
20	unsigned gatt_pages;
21	unsigned long stolen_size;
22	unsigned long vram_stolen_size;
23	struct rw_semaphore sem;
24};
25
26/* Exported functions */
27extern int psb_gtt_init(struct drm_device *dev, int resume);
28extern void psb_gtt_takedown(struct drm_device *dev);
29
30/* Each gtt_range describes an allocation in the GTT area */
31struct gtt_range {
32	struct resource resource;	/* Resource for our allocation */
33	u32 offset;			/* GTT offset of our object */
34	struct drm_gem_object gem;	/* GEM high level stuff */
35	int in_gart;			/* Currently in the GART (ref ct) */
36	bool stolen;			/* Backed from stolen RAM */
37	bool mmapping;			/* Is mmappable */
38	struct page **pages;		/* Backing pages if present */
39	int npage;			/* Number of backing pages */
40};
41
42#define to_gtt_range(x) container_of(x, struct gtt_range, gem)
43
44extern struct gtt_range *psb_gtt_alloc_range(struct drm_device *dev, int len,
45					     const char *name, int backed,
46					     u32 align);
47extern void psb_gtt_kref_put(struct gtt_range *gt);
48extern void psb_gtt_free_range(struct drm_device *dev, struct gtt_range *gt);
49extern int psb_gtt_pin(struct gtt_range *gt);
50extern void psb_gtt_unpin(struct gtt_range *gt);
51extern int psb_gtt_restore(struct drm_device *dev);
52#endif