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 | ||
1da177e4 LT |
36 | #include <linux/highmem.h> |
37 | #include "drmP.h" | |
38 | ||
39 | #ifdef DEBUG_MEMORY | |
40 | #include "drm_memory_debug.h" | |
41 | #else | |
42 | ||
43 | /** No-op. */ | |
44 | void drm_mem_init(void) | |
45 | { | |
46 | } | |
47 | ||
48 | /** | |
49 | * Called when "/proc/dri/%dev%/mem" is read. | |
b5e89ed5 | 50 | * |
1da177e4 LT |
51 | * \param buf output buffer. |
52 | * \param start start of output data. | |
53 | * \param offset requested start offset. | |
54 | * \param len requested number of bytes. | |
55 | * \param eof whether there is no more data to return. | |
56 | * \param data private data. | |
57 | * \return number of written bytes. | |
58 | * | |
b5e89ed5 | 59 | * No-op. |
1da177e4 LT |
60 | */ |
61 | int drm_mem_info(char *buf, char **start, off_t offset, | |
b5e89ed5 | 62 | int len, int *eof, void *data) |
1da177e4 LT |
63 | { |
64 | return 0; | |
65 | } | |
66 | ||
1da177e4 LT |
67 | /** Wrapper around kmalloc() and kfree() */ |
68 | void *drm_realloc(void *oldpt, size_t oldsize, size_t size, int area) | |
69 | { | |
70 | void *pt; | |
71 | ||
b5e89ed5 DA |
72 | if (!(pt = kmalloc(size, GFP_KERNEL))) |
73 | return NULL; | |
1da177e4 LT |
74 | if (oldpt && oldsize) { |
75 | memcpy(pt, oldpt, oldsize); | |
76 | kfree(oldpt); | |
77 | } | |
78 | return pt; | |
79 | } | |
80 | ||
1da177e4 | 81 | #if __OS_HAS_AGP |
031de96a | 82 | static void *agp_remap(unsigned long offset, unsigned long size, |
84b1fd10 | 83 | struct drm_device * dev) |
31f64bd1 DA |
84 | { |
85 | unsigned long *phys_addr_map, i, num_pages = | |
86 | PAGE_ALIGN(size) / PAGE_SIZE; | |
87 | struct drm_agp_mem *agpmem; | |
88 | struct page **page_map; | |
89 | void *addr; | |
90 | ||
91 | size = PAGE_ALIGN(size); | |
92 | ||
93 | #ifdef __alpha__ | |
94 | offset -= dev->hose->mem_space->start; | |
95 | #endif | |
96 | ||
bd1b331f | 97 | list_for_each_entry(agpmem, &dev->agp->memory, head) |
31f64bd1 DA |
98 | if (agpmem->bound <= offset |
99 | && (agpmem->bound + (agpmem->pages << PAGE_SHIFT)) >= | |
100 | (offset + size)) | |
101 | break; | |
102 | if (!agpmem) | |
103 | return NULL; | |
104 | ||
105 | /* | |
106 | * OK, we're mapping AGP space on a chipset/platform on which memory accesses by | |
107 | * the CPU do not get remapped by the GART. We fix this by using the kernel's | |
108 | * page-table instead (that's probably faster anyhow...). | |
109 | */ | |
110 | /* note: use vmalloc() because num_pages could be large... */ | |
111 | page_map = vmalloc(num_pages * sizeof(struct page *)); | |
112 | if (!page_map) | |
113 | return NULL; | |
114 | ||
115 | phys_addr_map = | |
116 | agpmem->memory->memory + (offset - agpmem->bound) / PAGE_SIZE; | |
117 | for (i = 0; i < num_pages; ++i) | |
118 | page_map[i] = pfn_to_page(phys_addr_map[i] >> PAGE_SHIFT); | |
119 | addr = vmap(page_map, num_pages, VM_IOREMAP, PAGE_AGP); | |
120 | vfree(page_map); | |
121 | ||
122 | return addr; | |
123 | } | |
124 | ||
1da177e4 | 125 | /** Wrapper around agp_allocate_memory() */ |
84b1fd10 | 126 | DRM_AGP_MEM *drm_alloc_agp(struct drm_device * dev, int pages, u32 type) |
1da177e4 | 127 | { |
b5d499cf | 128 | return drm_agp_allocate_memory(dev->agp->bridge, pages, type); |
1da177e4 | 129 | } |
b5e89ed5 | 130 | |
1da177e4 | 131 | /** Wrapper around agp_free_memory() */ |
b5e89ed5 | 132 | int drm_free_agp(DRM_AGP_MEM * handle, int pages) |
1da177e4 LT |
133 | { |
134 | return drm_agp_free_memory(handle) ? 0 : -EINVAL; | |
135 | } | |
b5e89ed5 | 136 | |
1da177e4 | 137 | /** Wrapper around agp_bind_memory() */ |
b5e89ed5 | 138 | int drm_bind_agp(DRM_AGP_MEM * handle, unsigned int start) |
1da177e4 LT |
139 | { |
140 | return drm_agp_bind_memory(handle, start); | |
141 | } | |
b5e89ed5 | 142 | |
1da177e4 | 143 | /** Wrapper around agp_unbind_memory() */ |
b5e89ed5 | 144 | int drm_unbind_agp(DRM_AGP_MEM * handle) |
1da177e4 LT |
145 | { |
146 | return drm_agp_unbind_memory(handle); | |
147 | } | |
031de96a AB |
148 | |
149 | #else /* __OS_HAS_AGP */ | |
031de96a | 150 | static inline void *agp_remap(unsigned long offset, unsigned long size, |
84b1fd10 | 151 | struct drm_device * dev) |
031de96a AB |
152 | { |
153 | return NULL; | |
154 | } | |
155 | ||
b5e89ed5 | 156 | #endif /* agp */ |
31f64bd1 | 157 | |
004a7727 | 158 | #endif /* debug_memory */ |
31f64bd1 | 159 | |
004a7727 | 160 | void drm_core_ioremap(struct drm_map *map, struct drm_device *dev) |
31f64bd1 | 161 | { |
004a7727 CH |
162 | if (drm_core_has_AGP(dev) && |
163 | dev->agp && dev->agp->cant_use_aperture && map->type == _DRM_AGP) | |
164 | map->handle = agp_remap(map->offset, map->size, dev); | |
165 | else | |
166 | map->handle = ioremap(map->offset, map->size); | |
31f64bd1 | 167 | } |
004a7727 | 168 | EXPORT_SYMBOL(drm_core_ioremap); |
31f64bd1 | 169 | |
004a7727 | 170 | void drm_core_ioremapfree(struct drm_map *map, struct drm_device *dev) |
31f64bd1 | 171 | { |
004a7727 CH |
172 | if (!map->handle || !map->size) |
173 | return; | |
174 | ||
175 | if (drm_core_has_AGP(dev) && | |
176 | dev->agp && dev->agp->cant_use_aperture && map->type == _DRM_AGP) | |
177 | vunmap(map->handle); | |
178 | else | |
179 | iounmap(map->handle); | |
31f64bd1 | 180 | } |
004a7727 | 181 | EXPORT_SYMBOL(drm_core_ioremapfree); |
31f64bd1 | 182 |