Commit | Line | Data |
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b5e89ed5 DA |
1 | /** |
2 | * \file drm_memory.c | |
1da177e4 LT |
3 | * Memory management wrappers for DRM |
4 | * | |
5 | * \author Rickard E. (Rik) Faith <faith@valinux.com> | |
6 | * \author Gareth Hughes <gareth@valinux.com> | |
7 | */ | |
8 | ||
b5e89ed5 | 9 | /* |
1da177e4 LT |
10 | * 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 "drmP.h" | |
39 | ||
40 | #ifdef DEBUG_MEMORY | |
41 | #include "drm_memory_debug.h" | |
42 | #else | |
43 | ||
44 | /** No-op. */ | |
45 | void drm_mem_init(void) | |
46 | { | |
47 | } | |
48 | ||
49 | /** | |
50 | * Called when "/proc/dri/%dev%/mem" is read. | |
b5e89ed5 | 51 | * |
1da177e4 LT |
52 | * \param buf output buffer. |
53 | * \param start start of output data. | |
54 | * \param offset requested start offset. | |
55 | * \param len requested number of bytes. | |
56 | * \param eof whether there is no more data to return. | |
57 | * \param data private data. | |
58 | * \return number of written bytes. | |
59 | * | |
b5e89ed5 | 60 | * No-op. |
1da177e4 LT |
61 | */ |
62 | int drm_mem_info(char *buf, char **start, off_t offset, | |
b5e89ed5 | 63 | int len, int *eof, void *data) |
1da177e4 LT |
64 | { |
65 | return 0; | |
66 | } | |
67 | ||
1da177e4 LT |
68 | /** Wrapper around kmalloc() and kfree() */ |
69 | void *drm_realloc(void *oldpt, size_t oldsize, size_t size, int area) | |
70 | { | |
71 | void *pt; | |
72 | ||
b5e89ed5 DA |
73 | if (!(pt = kmalloc(size, GFP_KERNEL))) |
74 | return NULL; | |
1da177e4 LT |
75 | if (oldpt && oldsize) { |
76 | memcpy(pt, oldpt, oldsize); | |
77 | kfree(oldpt); | |
78 | } | |
79 | return pt; | |
80 | } | |
81 | ||
1da177e4 LT |
82 | #if __OS_HAS_AGP |
83 | /** Wrapper around agp_allocate_memory() */ | |
b5e89ed5 | 84 | DRM_AGP_MEM *drm_alloc_agp(drm_device_t * dev, int pages, u32 type) |
1da177e4 | 85 | { |
b5d499cf | 86 | return drm_agp_allocate_memory(dev->agp->bridge, pages, type); |
1da177e4 | 87 | } |
b5e89ed5 | 88 | |
1da177e4 | 89 | /** Wrapper around agp_free_memory() */ |
b5e89ed5 | 90 | int drm_free_agp(DRM_AGP_MEM * handle, int pages) |
1da177e4 LT |
91 | { |
92 | return drm_agp_free_memory(handle) ? 0 : -EINVAL; | |
93 | } | |
b5e89ed5 | 94 | |
1da177e4 | 95 | /** Wrapper around agp_bind_memory() */ |
b5e89ed5 | 96 | int drm_bind_agp(DRM_AGP_MEM * handle, unsigned int start) |
1da177e4 LT |
97 | { |
98 | return drm_agp_bind_memory(handle, start); | |
99 | } | |
b5e89ed5 | 100 | |
1da177e4 | 101 | /** Wrapper around agp_unbind_memory() */ |
b5e89ed5 | 102 | int drm_unbind_agp(DRM_AGP_MEM * handle) |
1da177e4 LT |
103 | { |
104 | return drm_agp_unbind_memory(handle); | |
105 | } | |
b5e89ed5 DA |
106 | #endif /* agp */ |
107 | #endif /* debug_memory */ |