1/**************************************************************************
2 * Copyright (c) 2007-2008, Intel Corporation.
3 * All Rights Reserved.
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms and conditions of the GNU General Public License,
7 * version 2, as published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
12 * more details.
13 *
14 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
17 *
18 **************************************************************************/
19
20#ifndef _PSB_GTT_H_
21#define _PSB_GTT_H_
22
23#include <drm/drmP.h>
24
25/* This wants cleaning up with respect to the psb_dev and un-needed stuff */
26struct psb_gtt {
27	uint32_t gatt_start;
28	uint32_t mmu_gatt_start;
29	uint32_t gtt_start;
30	uint32_t gtt_phys_start;
31	unsigned gtt_pages;
32	unsigned gatt_pages;
33	unsigned long stolen_size;
34	unsigned long vram_stolen_size;
35	struct rw_semaphore sem;
36};
37
38/* Exported functions */
39extern int psb_gtt_init(struct drm_device *dev, int resume);
40extern void psb_gtt_takedown(struct drm_device *dev);
41
42/* Each gtt_range describes an allocation in the GTT area */
43struct gtt_range {
44	struct resource resource;	/* Resource for our allocation */
45	u32 offset;			/* GTT offset of our object */
46	struct drm_gem_object gem;	/* GEM high level stuff */
47	int in_gart;			/* Currently in the GART (ref ct) */
48	bool stolen;			/* Backed from stolen RAM */
49	bool mmapping;			/* Is mmappable */
50	struct page **pages;		/* Backing pages if present */
51	int npage;			/* Number of backing pages */
52	int roll;			/* Roll applied to the GTT entries */
53};
54
55extern struct gtt_range *psb_gtt_alloc_range(struct drm_device *dev, int len,
56						const char *name, int backed);
57extern void psb_gtt_kref_put(struct gtt_range *gt);
58extern void psb_gtt_free_range(struct drm_device *dev, struct gtt_range *gt);
59extern int psb_gtt_pin(struct gtt_range *gt);
60extern void psb_gtt_unpin(struct gtt_range *gt);
61extern void psb_gtt_roll(struct drm_device *dev,
62					struct gtt_range *gt, int roll);
63
64#endif
65