diff options
-rw-r--r-- | drivers/char/drm/drm_memory.c | 117 | ||||
-rw-r--r-- | drivers/char/drm/drm_memory.h | 116 |
2 files changed, 127 insertions, 106 deletions
diff --git a/drivers/char/drm/drm_memory.c b/drivers/char/drm/drm_memory.c index dddf8de66143..7ea00e3372fd 100644 --- a/drivers/char/drm/drm_memory.c +++ b/drivers/char/drm/drm_memory.c | |||
@@ -80,6 +80,71 @@ void *drm_realloc(void *oldpt, size_t oldsize, size_t size, int area) | |||
80 | } | 80 | } |
81 | 81 | ||
82 | #if __OS_HAS_AGP | 82 | #if __OS_HAS_AGP |
83 | /* | ||
84 | * Find the drm_map that covers the range [offset, offset+size). | ||
85 | */ | ||
86 | drm_map_t *drm_lookup_map(unsigned long offset, | ||
87 | unsigned long size, drm_device_t * dev) | ||
88 | { | ||
89 | struct list_head *list; | ||
90 | drm_map_list_t *r_list; | ||
91 | drm_map_t *map; | ||
92 | |||
93 | list_for_each(list, &dev->maplist->head) { | ||
94 | r_list = (drm_map_list_t *) list; | ||
95 | map = r_list->map; | ||
96 | if (!map) | ||
97 | continue; | ||
98 | if (map->offset <= offset | ||
99 | && (offset + size) <= (map->offset + map->size)) | ||
100 | return map; | ||
101 | } | ||
102 | return NULL; | ||
103 | } | ||
104 | |||
105 | void *agp_remap(unsigned long offset, unsigned long size, | ||
106 | drm_device_t * dev) | ||
107 | { | ||
108 | unsigned long *phys_addr_map, i, num_pages = | ||
109 | PAGE_ALIGN(size) / PAGE_SIZE; | ||
110 | struct drm_agp_mem *agpmem; | ||
111 | struct page **page_map; | ||
112 | void *addr; | ||
113 | |||
114 | size = PAGE_ALIGN(size); | ||
115 | |||
116 | #ifdef __alpha__ | ||
117 | offset -= dev->hose->mem_space->start; | ||
118 | #endif | ||
119 | |||
120 | for (agpmem = dev->agp->memory; agpmem; agpmem = agpmem->next) | ||
121 | if (agpmem->bound <= offset | ||
122 | && (agpmem->bound + (agpmem->pages << PAGE_SHIFT)) >= | ||
123 | (offset + size)) | ||
124 | break; | ||
125 | if (!agpmem) | ||
126 | return NULL; | ||
127 | |||
128 | /* | ||
129 | * OK, we're mapping AGP space on a chipset/platform on which memory accesses by | ||
130 | * the CPU do not get remapped by the GART. We fix this by using the kernel's | ||
131 | * page-table instead (that's probably faster anyhow...). | ||
132 | */ | ||
133 | /* note: use vmalloc() because num_pages could be large... */ | ||
134 | page_map = vmalloc(num_pages * sizeof(struct page *)); | ||
135 | if (!page_map) | ||
136 | return NULL; | ||
137 | |||
138 | phys_addr_map = | ||
139 | agpmem->memory->memory + (offset - agpmem->bound) / PAGE_SIZE; | ||
140 | for (i = 0; i < num_pages; ++i) | ||
141 | page_map[i] = pfn_to_page(phys_addr_map[i] >> PAGE_SHIFT); | ||
142 | addr = vmap(page_map, num_pages, VM_IOREMAP, PAGE_AGP); | ||
143 | vfree(page_map); | ||
144 | |||
145 | return addr; | ||
146 | } | ||
147 | |||
83 | /** Wrapper around agp_allocate_memory() */ | 148 | /** Wrapper around agp_allocate_memory() */ |
84 | DRM_AGP_MEM *drm_alloc_agp(drm_device_t * dev, int pages, u32 type) | 149 | DRM_AGP_MEM *drm_alloc_agp(drm_device_t * dev, int pages, u32 type) |
85 | { | 150 | { |
@@ -104,4 +169,56 @@ int drm_unbind_agp(DRM_AGP_MEM * handle) | |||
104 | return drm_agp_unbind_memory(handle); | 169 | return drm_agp_unbind_memory(handle); |
105 | } | 170 | } |
106 | #endif /* agp */ | 171 | #endif /* agp */ |
172 | |||
173 | void *drm_ioremap(unsigned long offset, unsigned long size, | ||
174 | drm_device_t * dev) | ||
175 | { | ||
176 | if (drm_core_has_AGP(dev) && dev->agp && dev->agp->cant_use_aperture) { | ||
177 | drm_map_t *map = drm_lookup_map(offset, size, dev); | ||
178 | |||
179 | if (map && map->type == _DRM_AGP) | ||
180 | return agp_remap(offset, size, dev); | ||
181 | } | ||
182 | return ioremap(offset, size); | ||
183 | } | ||
184 | EXPORT_SYMBOL(drm_ioremap); | ||
185 | |||
186 | void *drm_ioremap_nocache(unsigned long offset, | ||
187 | unsigned long size, drm_device_t * dev) | ||
188 | { | ||
189 | if (drm_core_has_AGP(dev) && dev->agp && dev->agp->cant_use_aperture) { | ||
190 | drm_map_t *map = drm_lookup_map(offset, size, dev); | ||
191 | |||
192 | if (map && map->type == _DRM_AGP) | ||
193 | return agp_remap(offset, size, dev); | ||
194 | } | ||
195 | return ioremap_nocache(offset, size); | ||
196 | } | ||
197 | |||
198 | void drm_ioremapfree(void *pt, unsigned long size, | ||
199 | drm_device_t * dev) | ||
200 | { | ||
201 | /* | ||
202 | * This is a bit ugly. It would be much cleaner if the DRM API would use separate | ||
203 | * routines for handling mappings in the AGP space. Hopefully this can be done in | ||
204 | * a future revision of the interface... | ||
205 | */ | ||
206 | if (drm_core_has_AGP(dev) && dev->agp && dev->agp->cant_use_aperture | ||
207 | && ((unsigned long)pt >= VMALLOC_START | ||
208 | && (unsigned long)pt < VMALLOC_END)) { | ||
209 | unsigned long offset; | ||
210 | drm_map_t *map; | ||
211 | |||
212 | offset = drm_follow_page(pt) | ((unsigned long)pt & ~PAGE_MASK); | ||
213 | map = drm_lookup_map(offset, size, dev); | ||
214 | if (map && map->type == _DRM_AGP) { | ||
215 | vunmap(pt); | ||
216 | return; | ||
217 | } | ||
218 | } | ||
219 | |||
220 | iounmap(pt); | ||
221 | } | ||
222 | EXPORT_SYMBOL(drm_ioremapfree); | ||
223 | |||
107 | #endif /* debug_memory */ | 224 | #endif /* debug_memory */ |
diff --git a/drivers/char/drm/drm_memory.h b/drivers/char/drm/drm_memory.h index 3732a61c3762..645a08878e55 100644 --- a/drivers/char/drm/drm_memory.h +++ b/drivers/char/drm/drm_memory.h | |||
@@ -60,67 +60,11 @@ | |||
60 | /* | 60 | /* |
61 | * Find the drm_map that covers the range [offset, offset+size). | 61 | * Find the drm_map that covers the range [offset, offset+size). |
62 | */ | 62 | */ |
63 | static inline drm_map_t *drm_lookup_map(unsigned long offset, | 63 | drm_map_t *drm_lookup_map(unsigned long offset, |
64 | unsigned long size, drm_device_t * dev) | 64 | unsigned long size, drm_device_t * dev); |
65 | { | ||
66 | struct list_head *list; | ||
67 | drm_map_list_t *r_list; | ||
68 | drm_map_t *map; | ||
69 | |||
70 | list_for_each(list, &dev->maplist->head) { | ||
71 | r_list = (drm_map_list_t *) list; | ||
72 | map = r_list->map; | ||
73 | if (!map) | ||
74 | continue; | ||
75 | if (map->offset <= offset | ||
76 | && (offset + size) <= (map->offset + map->size)) | ||
77 | return map; | ||
78 | } | ||
79 | return NULL; | ||
80 | } | ||
81 | |||
82 | static inline void *agp_remap(unsigned long offset, unsigned long size, | ||
83 | drm_device_t * dev) | ||
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 | 65 | ||
97 | for (agpmem = dev->agp->memory; agpmem; agpmem = agpmem->next) | 66 | void *agp_remap(unsigned long offset, unsigned long size, |
98 | if (agpmem->bound <= offset | 67 | drm_device_t * dev); |
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 | 68 | ||
125 | static inline unsigned long drm_follow_page(void *vaddr) | 69 | static inline unsigned long drm_follow_page(void *vaddr) |
126 | { | 70 | { |
@@ -152,51 +96,11 @@ static inline unsigned long drm_follow_page(void *vaddr) | |||
152 | 96 | ||
153 | #endif | 97 | #endif |
154 | 98 | ||
155 | static inline void *drm_ioremap(unsigned long offset, unsigned long size, | 99 | void *drm_ioremap(unsigned long offset, unsigned long size, |
156 | drm_device_t * dev) | 100 | drm_device_t * dev); |
157 | { | ||
158 | if (drm_core_has_AGP(dev) && dev->agp && dev->agp->cant_use_aperture) { | ||
159 | drm_map_t *map = drm_lookup_map(offset, size, dev); | ||
160 | 101 | ||
161 | if (map && map->type == _DRM_AGP) | 102 | void *drm_ioremap_nocache(unsigned long offset, |
162 | return agp_remap(offset, size, dev); | 103 | unsigned long size, drm_device_t * dev); |
163 | } | ||
164 | return ioremap(offset, size); | ||
165 | } | ||
166 | 104 | ||
167 | static inline void *drm_ioremap_nocache(unsigned long offset, | 105 | void drm_ioremapfree(void *pt, unsigned long size, |
168 | unsigned long size, drm_device_t * dev) | 106 | drm_device_t * dev); |
169 | { | ||
170 | if (drm_core_has_AGP(dev) && dev->agp && dev->agp->cant_use_aperture) { | ||
171 | drm_map_t *map = drm_lookup_map(offset, size, dev); | ||
172 | |||
173 | if (map && map->type == _DRM_AGP) | ||
174 | return agp_remap(offset, size, dev); | ||
175 | } | ||
176 | return ioremap_nocache(offset, size); | ||
177 | } | ||
178 | |||
179 | static inline void drm_ioremapfree(void *pt, unsigned long size, | ||
180 | drm_device_t * dev) | ||
181 | { | ||
182 | /* | ||
183 | * This is a bit ugly. It would be much cleaner if the DRM API would use separate | ||
184 | * routines for handling mappings in the AGP space. Hopefully this can be done in | ||
185 | * a future revision of the interface... | ||
186 | */ | ||
187 | if (drm_core_has_AGP(dev) && dev->agp && dev->agp->cant_use_aperture | ||
188 | && ((unsigned long)pt >= VMALLOC_START | ||
189 | && (unsigned long)pt < VMALLOC_END)) { | ||
190 | unsigned long offset; | ||
191 | drm_map_t *map; | ||
192 | |||
193 | offset = drm_follow_page(pt) | ((unsigned long)pt & ~PAGE_MASK); | ||
194 | map = drm_lookup_map(offset, size, dev); | ||
195 | if (map && map->type == _DRM_AGP) { | ||
196 | vunmap(pt); | ||
197 | return; | ||
198 | } | ||
199 | } | ||
200 | |||
201 | iounmap(pt); | ||
202 | } | ||