blob: 645a08878e551b72babd9409c9dbf43dca490f19 [file] [log] [blame]
Dave Airlieb5e89ed2005-09-25 14:28:13 +10001/**
2 * \file drm_memory.h
Linus Torvalds1da177e2005-04-16 15:20:36 -07003 * Memory management wrappers for DRM
4 *
5 * \author Rickard E. (Rik) Faith <faith@valinux.com>
6 * \author Gareth Hughes <gareth@valinux.com>
7 */
8
Dave Airlieb5e89ed2005-09-25 14:28:13 +10009/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070010 * Created: Thu Feb 4 14:00:34 1999 by faith@valinux.com
11 *
12 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
13 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
14 * All Rights Reserved.
15 *
16 * Permission is hereby granted, free of charge, to any person obtaining a
17 * copy of this software and associated documentation files (the "Software"),
18 * to deal in the Software without restriction, including without limitation
19 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
20 * and/or sell copies of the Software, and to permit persons to whom the
21 * Software is furnished to do so, subject to the following conditions:
22 *
23 * The above copyright notice and this permission notice (including the next
24 * paragraph) shall be included in all copies or substantial portions of the
25 * Software.
26 *
27 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
28 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
29 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
30 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
31 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
32 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
33 * OTHER DEALINGS IN THE SOFTWARE.
34 */
35
36#include <linux/config.h>
37#include <linux/highmem.h>
38#include <linux/vmalloc.h>
39#include "drmP.h"
40
41/**
42 * Cut down version of drm_memory_debug.h, which used to be called
Dave Airlieb5e89ed2005-09-25 14:28:13 +100043 * drm_memory.h.
Linus Torvalds1da177e2005-04-16 15:20:36 -070044 */
45
46#if __OS_HAS_AGP
47
48#include <linux/vmalloc.h>
49
50#ifdef HAVE_PAGE_AGP
51#include <asm/agp.h>
52#else
53# ifdef __powerpc__
54# define PAGE_AGP __pgprot(_PAGE_KERNEL | _PAGE_NO_CACHE)
55# else
56# define PAGE_AGP PAGE_KERNEL
57# endif
58#endif
59
60/*
61 * Find the drm_map that covers the range [offset, offset+size).
62 */
Dave Airlie31f64bd2006-04-07 16:55:43 +100063drm_map_t *drm_lookup_map(unsigned long offset,
64 unsigned long size, drm_device_t * dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -070065
Dave Airlie31f64bd2006-04-07 16:55:43 +100066void *agp_remap(unsigned long offset, unsigned long size,
67 drm_device_t * dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -070068
Dave Airlieb5e89ed2005-09-25 14:28:13 +100069static inline unsigned long drm_follow_page(void *vaddr)
Linus Torvalds1da177e2005-04-16 15:20:36 -070070{
Dave Airlieb5e89ed2005-09-25 14:28:13 +100071 pgd_t *pgd = pgd_offset_k((unsigned long)vaddr);
72 pud_t *pud = pud_offset(pgd, (unsigned long)vaddr);
73 pmd_t *pmd = pmd_offset(pud, (unsigned long)vaddr);
74 pte_t *ptep = pte_offset_kernel(pmd, (unsigned long)vaddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -070075 return pte_pfn(*ptep) << PAGE_SHIFT;
76}
77
Dave Airlieb5e89ed2005-09-25 14:28:13 +100078#else /* __OS_HAS_AGP */
Linus Torvalds1da177e2005-04-16 15:20:36 -070079
Dave Airlieb5e89ed2005-09-25 14:28:13 +100080static inline drm_map_t *drm_lookup_map(unsigned long offset,
81 unsigned long size, drm_device_t * dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -070082{
Dave Airlieb5e89ed2005-09-25 14:28:13 +100083 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -070084}
85
Dave Airlieb5e89ed2005-09-25 14:28:13 +100086static inline void *agp_remap(unsigned long offset, unsigned long size,
87 drm_device_t * dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -070088{
Dave Airlieb5e89ed2005-09-25 14:28:13 +100089 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -070090}
91
Dave Airlieb5e89ed2005-09-25 14:28:13 +100092static inline unsigned long drm_follow_page(void *vaddr)
Linus Torvalds1da177e2005-04-16 15:20:36 -070093{
Dave Airlieb5e89ed2005-09-25 14:28:13 +100094 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -070095}
96
97#endif
98
Dave Airlie31f64bd2006-04-07 16:55:43 +100099void *drm_ioremap(unsigned long offset, unsigned long size,
100 drm_device_t * dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101
Dave Airlie31f64bd2006-04-07 16:55:43 +1000102void *drm_ioremap_nocache(unsigned long offset,
103 unsigned long size, drm_device_t * dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104
Dave Airlie31f64bd2006-04-07 16:55:43 +1000105void drm_ioremapfree(void *pt, unsigned long size,
106 drm_device_t * dev);