gma500: GEM - now we have the basics we shall stick pins in it
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / staging / gma500 / psb_gtt.h
blobdc553e07a9dec9eb4e42acbd446d78cdd71b72ea
1 /**************************************************************************
2 * Copyright (c) 2007-2008, Intel Corporation.
3 * All Rights Reserved.
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.
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.
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.
18 **************************************************************************/
20 #ifndef _PSB_GTT_H_
21 #define _PSB_GTT_H_
23 #include <drm/drmP.h>
25 struct psb_gtt {
26 struct drm_device *dev;
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;
38 /*Exported functions*/
39 extern int psb_gtt_init(struct drm_device *dev, int resume);
40 extern void psb_gtt_takedown(struct drm_device *dev);
42 /* Each gtt_range describes an allocation in the GTT area */
43 struct gtt_range {
44 struct resource resource;
45 u32 offset;
46 struct kref kref;
47 struct drm_gem_object gem; /* GEM high level stuff */
48 int in_gart; /* Currently in the GART (ref ct) */
49 bool stolen; /* Backed from stolen RAM */
50 struct page **pages; /* Backing pages if present */
53 extern struct gtt_range *psb_gtt_alloc_range(struct drm_device *dev, int len,
54 const char *name, int backed);
55 extern void psb_gtt_kref_put(struct gtt_range *gt);
56 extern void psb_gtt_free_range(struct drm_device *dev, struct gtt_range *gt);
57 extern int psb_gtt_pin(struct drm_device *dev, struct gtt_range *gt);
58 extern void psb_gtt_unpin(struct drm_device *dev, struct gtt_range *gt);
60 #endif