Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /** |
b5e89ed5 | 2 | * \file drm_vm.c |
1da177e4 | 3 | * Memory mapping for DRM |
b5e89ed5 | 4 | * |
1da177e4 LT |
5 | * \author Rickard E. (Rik) Faith <faith@valinux.com> |
6 | * \author Gareth Hughes <gareth@valinux.com> | |
7 | */ | |
8 | ||
9 | /* | |
10 | * Created: Mon Jan 4 08:58:31 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 "drmP.h" | |
37 | #if defined(__ia64__) | |
38 | #include <linux/efi.h> | |
39 | #endif | |
40 | ||
c94f7029 DA |
41 | static void drm_vm_open(struct vm_area_struct *vma); |
42 | static void drm_vm_close(struct vm_area_struct *vma); | |
1da177e4 | 43 | |
0bead7cd | 44 | static pgprot_t drm_io_prot(uint32_t map_type, struct vm_area_struct *vma) |
5cc7f9ab DA |
45 | { |
46 | pgprot_t tmp = vm_get_page_prot(vma->vm_flags); | |
47 | ||
48 | #if defined(__i386__) || defined(__x86_64__) | |
49 | if (boot_cpu_data.x86 > 3 && map_type != _DRM_AGP) { | |
50 | pgprot_val(tmp) |= _PAGE_PCD; | |
51 | pgprot_val(tmp) &= ~_PAGE_PWT; | |
52 | } | |
53 | #elif defined(__powerpc__) | |
54 | pgprot_val(tmp) |= _PAGE_NO_CACHE; | |
55 | if (map_type == _DRM_REGISTERS) | |
56 | pgprot_val(tmp) |= _PAGE_GUARDED; | |
6876b3ba | 57 | #elif defined(__ia64__) |
5cc7f9ab DA |
58 | if (efi_range_is_wc(vma->vm_start, vma->vm_end - |
59 | vma->vm_start)) | |
60 | tmp = pgprot_writecombine(tmp); | |
61 | else | |
62 | tmp = pgprot_noncached(tmp); | |
6876b3ba BH |
63 | #elif defined(__sparc__) |
64 | tmp = pgprot_noncached(tmp); | |
65 | #endif | |
66 | return tmp; | |
67 | } | |
68 | ||
69 | static pgprot_t drm_dma_prot(uint32_t map_type, struct vm_area_struct *vma) | |
70 | { | |
71 | pgprot_t tmp = vm_get_page_prot(vma->vm_flags); | |
72 | ||
73 | #if defined(__powerpc__) && defined(CONFIG_NOT_COHERENT_CACHE) | |
74 | tmp |= _PAGE_NO_CACHE; | |
5cc7f9ab DA |
75 | #endif |
76 | return tmp; | |
77 | } | |
78 | ||
1da177e4 | 79 | /** |
ca0b07d9 | 80 | * \c fault method for AGP virtual memory. |
1da177e4 LT |
81 | * |
82 | * \param vma virtual memory area. | |
83 | * \param address access address. | |
84 | * \return pointer to the page structure. | |
b5e89ed5 | 85 | * |
1da177e4 LT |
86 | * Find the right map and if it's AGP memory find the real physical page to |
87 | * map, get the page, increment the use count and return it. | |
88 | */ | |
89 | #if __OS_HAS_AGP | |
ca0b07d9 | 90 | static int drm_do_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
1da177e4 | 91 | { |
84b1fd10 | 92 | struct drm_file *priv = vma->vm_file->private_data; |
2c14f28b | 93 | struct drm_device *dev = priv->minor->dev; |
c60ce623 | 94 | struct drm_map *map = NULL; |
55910517 | 95 | struct drm_map_list *r_list; |
e0be428e | 96 | struct drm_hash_item *hash; |
1da177e4 LT |
97 | |
98 | /* | |
b5e89ed5 DA |
99 | * Find the right map |
100 | */ | |
1da177e4 | 101 | if (!drm_core_has_AGP(dev)) |
ca0b07d9 | 102 | goto vm_fault_error; |
1da177e4 | 103 | |
b5e89ed5 | 104 | if (!dev->agp || !dev->agp->cant_use_aperture) |
ca0b07d9 | 105 | goto vm_fault_error; |
1da177e4 | 106 | |
1545085a | 107 | if (drm_ht_find_item(&dev->map_hash, vma->vm_pgoff, &hash)) |
ca0b07d9 | 108 | goto vm_fault_error; |
8d153f71 | 109 | |
55910517 | 110 | r_list = drm_hash_entry(hash, struct drm_map_list, hash); |
8d153f71 | 111 | map = r_list->map; |
1da177e4 LT |
112 | |
113 | if (map && map->type == _DRM_AGP) { | |
ca0b07d9 NP |
114 | /* |
115 | * Using vm_pgoff as a selector forces us to use this unusual | |
116 | * addressing scheme. | |
117 | */ | |
118 | unsigned long offset = (unsigned long)vmf->virtual_address - | |
119 | vma->vm_start; | |
d1f2b55a | 120 | unsigned long baddr = map->offset + offset; |
1da177e4 LT |
121 | struct drm_agp_mem *agpmem; |
122 | struct page *page; | |
123 | ||
124 | #ifdef __alpha__ | |
125 | /* | |
b5e89ed5 DA |
126 | * Adjust to a bus-relative address |
127 | */ | |
1da177e4 LT |
128 | baddr -= dev->hose->mem_space->start; |
129 | #endif | |
130 | ||
131 | /* | |
b5e89ed5 DA |
132 | * It's AGP memory - find the real physical page to map |
133 | */ | |
bd1b331f | 134 | list_for_each_entry(agpmem, &dev->agp->memory, head) { |
1da177e4 | 135 | if (agpmem->bound <= baddr && |
b5e89ed5 | 136 | agpmem->bound + agpmem->pages * PAGE_SIZE > baddr) |
1da177e4 LT |
137 | break; |
138 | } | |
139 | ||
b5e89ed5 | 140 | if (!agpmem) |
ca0b07d9 | 141 | goto vm_fault_error; |
1da177e4 LT |
142 | |
143 | /* | |
b5e89ed5 DA |
144 | * Get the page, inc the use count, and return it |
145 | */ | |
1da177e4 LT |
146 | offset = (baddr - agpmem->bound) >> PAGE_SHIFT; |
147 | page = virt_to_page(__va(agpmem->memory->memory[offset])); | |
148 | get_page(page); | |
ca0b07d9 | 149 | vmf->page = page; |
1da177e4 | 150 | |
b5e89ed5 DA |
151 | DRM_DEBUG |
152 | ("baddr = 0x%lx page = 0x%p, offset = 0x%lx, count=%d\n", | |
153 | baddr, __va(agpmem->memory->memory[offset]), offset, | |
154 | page_count(page)); | |
ca0b07d9 | 155 | return 0; |
b5e89ed5 | 156 | } |
ca0b07d9 NP |
157 | vm_fault_error: |
158 | return VM_FAULT_SIGBUS; /* Disallow mremap */ | |
1da177e4 | 159 | } |
b5e89ed5 | 160 | #else /* __OS_HAS_AGP */ |
ca0b07d9 | 161 | static int drm_do_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
1da177e4 | 162 | { |
ca0b07d9 | 163 | return VM_FAULT_SIGBUS; |
1da177e4 | 164 | } |
b5e89ed5 | 165 | #endif /* __OS_HAS_AGP */ |
1da177e4 LT |
166 | |
167 | /** | |
168 | * \c nopage method for shared virtual memory. | |
169 | * | |
170 | * \param vma virtual memory area. | |
171 | * \param address access address. | |
172 | * \return pointer to the page structure. | |
b5e89ed5 | 173 | * |
59c51591 | 174 | * Get the mapping, find the real physical page to map, get the page, and |
1da177e4 LT |
175 | * return it. |
176 | */ | |
ca0b07d9 | 177 | static int drm_do_vm_shm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
1da177e4 | 178 | { |
c60ce623 | 179 | struct drm_map *map = (struct drm_map *) vma->vm_private_data; |
b5e89ed5 DA |
180 | unsigned long offset; |
181 | unsigned long i; | |
182 | struct page *page; | |
1da177e4 | 183 | |
b5e89ed5 | 184 | if (!map) |
ca0b07d9 | 185 | return VM_FAULT_SIGBUS; /* Nothing allocated */ |
1da177e4 | 186 | |
ca0b07d9 | 187 | offset = (unsigned long)vmf->virtual_address - vma->vm_start; |
1da177e4 | 188 | i = (unsigned long)map->handle + offset; |
38315878 | 189 | page = vmalloc_to_page((void *)i); |
1da177e4 | 190 | if (!page) |
ca0b07d9 | 191 | return VM_FAULT_SIGBUS; |
1da177e4 | 192 | get_page(page); |
ca0b07d9 | 193 | vmf->page = page; |
1da177e4 | 194 | |
ca0b07d9 NP |
195 | DRM_DEBUG("shm_fault 0x%lx\n", offset); |
196 | return 0; | |
1da177e4 LT |
197 | } |
198 | ||
1da177e4 LT |
199 | /** |
200 | * \c close method for shared virtual memory. | |
b5e89ed5 | 201 | * |
1da177e4 | 202 | * \param vma virtual memory area. |
b5e89ed5 | 203 | * |
1da177e4 LT |
204 | * Deletes map information if we are the last |
205 | * person to close a mapping and it's not in the global maplist. | |
206 | */ | |
c94f7029 | 207 | static void drm_vm_shm_close(struct vm_area_struct *vma) |
1da177e4 | 208 | { |
84b1fd10 | 209 | struct drm_file *priv = vma->vm_file->private_data; |
2c14f28b | 210 | struct drm_device *dev = priv->minor->dev; |
8fc2fdf4 | 211 | struct drm_vma_entry *pt, *temp; |
c60ce623 | 212 | struct drm_map *map; |
55910517 | 213 | struct drm_map_list *r_list; |
1da177e4 LT |
214 | int found_maps = 0; |
215 | ||
216 | DRM_DEBUG("0x%08lx,0x%08lx\n", | |
217 | vma->vm_start, vma->vm_end - vma->vm_start); | |
218 | atomic_dec(&dev->vma_count); | |
219 | ||
220 | map = vma->vm_private_data; | |
221 | ||
30e2fb18 | 222 | mutex_lock(&dev->struct_mutex); |
bd1b331f | 223 | list_for_each_entry_safe(pt, temp, &dev->vmalist, head) { |
b5e89ed5 DA |
224 | if (pt->vma->vm_private_data == map) |
225 | found_maps++; | |
1da177e4 | 226 | if (pt->vma == vma) { |
bd1b331f | 227 | list_del(&pt->head); |
1da177e4 | 228 | drm_free(pt, sizeof(*pt), DRM_MEM_VMAS); |
1da177e4 LT |
229 | } |
230 | } | |
bd1b331f | 231 | |
1da177e4 | 232 | /* We were the only map that was found */ |
b5e89ed5 | 233 | if (found_maps == 1 && map->flags & _DRM_REMOVABLE) { |
1da177e4 LT |
234 | /* Check to see if we are in the maplist, if we are not, then |
235 | * we delete this mappings information. | |
236 | */ | |
237 | found_maps = 0; | |
bd1b331f | 238 | list_for_each_entry(r_list, &dev->maplist, head) { |
b5e89ed5 DA |
239 | if (r_list->map == map) |
240 | found_maps++; | |
1da177e4 LT |
241 | } |
242 | ||
b5e89ed5 | 243 | if (!found_maps) { |
9c8da5eb DA |
244 | drm_dma_handle_t dmah; |
245 | ||
1da177e4 LT |
246 | switch (map->type) { |
247 | case _DRM_REGISTERS: | |
248 | case _DRM_FRAME_BUFFER: | |
249 | if (drm_core_has_MTRR(dev) && map->mtrr >= 0) { | |
250 | int retcode; | |
251 | retcode = mtrr_del(map->mtrr, | |
252 | map->offset, | |
253 | map->size); | |
254 | DRM_DEBUG("mtrr_del = %d\n", retcode); | |
255 | } | |
004a7727 | 256 | iounmap(map->handle); |
1da177e4 LT |
257 | break; |
258 | case _DRM_SHM: | |
259 | vfree(map->handle); | |
260 | break; | |
261 | case _DRM_AGP: | |
262 | case _DRM_SCATTER_GATHER: | |
263 | break; | |
2d0f9eaf | 264 | case _DRM_CONSISTENT: |
9c8da5eb DA |
265 | dmah.vaddr = map->handle; |
266 | dmah.busaddr = map->offset; | |
267 | dmah.size = map->size; | |
268 | __drm_pci_free(dev, &dmah); | |
2d0f9eaf | 269 | break; |
a2c0a97b JB |
270 | case _DRM_GEM: |
271 | DRM_ERROR("tried to rmmap GEM object\n"); | |
272 | break; | |
1da177e4 LT |
273 | } |
274 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
275 | } | |
276 | } | |
30e2fb18 | 277 | mutex_unlock(&dev->struct_mutex); |
1da177e4 LT |
278 | } |
279 | ||
280 | /** | |
ca0b07d9 | 281 | * \c fault method for DMA virtual memory. |
1da177e4 LT |
282 | * |
283 | * \param vma virtual memory area. | |
284 | * \param address access address. | |
285 | * \return pointer to the page structure. | |
b5e89ed5 | 286 | * |
1da177e4 LT |
287 | * Determine the page number from the page offset and get it from drm_device_dma::pagelist. |
288 | */ | |
ca0b07d9 | 289 | static int drm_do_vm_dma_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
1da177e4 | 290 | { |
84b1fd10 | 291 | struct drm_file *priv = vma->vm_file->private_data; |
2c14f28b | 292 | struct drm_device *dev = priv->minor->dev; |
cdd55a29 | 293 | struct drm_device_dma *dma = dev->dma; |
b5e89ed5 DA |
294 | unsigned long offset; |
295 | unsigned long page_nr; | |
296 | struct page *page; | |
297 | ||
298 | if (!dma) | |
ca0b07d9 | 299 | return VM_FAULT_SIGBUS; /* Error */ |
b5e89ed5 | 300 | if (!dma->pagelist) |
ca0b07d9 | 301 | return VM_FAULT_SIGBUS; /* Nothing allocated */ |
b5e89ed5 | 302 | |
ca0b07d9 NP |
303 | offset = (unsigned long)vmf->virtual_address - vma->vm_start; /* vm_[pg]off[set] should be 0 */ |
304 | page_nr = offset >> PAGE_SHIFT; /* page_nr could just be vmf->pgoff */ | |
b5e89ed5 | 305 | page = virt_to_page((dma->pagelist[page_nr] + (offset & (~PAGE_MASK)))); |
1da177e4 LT |
306 | |
307 | get_page(page); | |
ca0b07d9 | 308 | vmf->page = page; |
1da177e4 | 309 | |
ca0b07d9 NP |
310 | DRM_DEBUG("dma_fault 0x%lx (page %lu)\n", offset, page_nr); |
311 | return 0; | |
1da177e4 LT |
312 | } |
313 | ||
314 | /** | |
ca0b07d9 | 315 | * \c fault method for scatter-gather virtual memory. |
1da177e4 LT |
316 | * |
317 | * \param vma virtual memory area. | |
318 | * \param address access address. | |
319 | * \return pointer to the page structure. | |
b5e89ed5 | 320 | * |
1da177e4 LT |
321 | * Determine the map offset from the page offset and get it from drm_sg_mem::pagelist. |
322 | */ | |
ca0b07d9 | 323 | static int drm_do_vm_sg_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
1da177e4 | 324 | { |
c60ce623 | 325 | struct drm_map *map = (struct drm_map *) vma->vm_private_data; |
84b1fd10 | 326 | struct drm_file *priv = vma->vm_file->private_data; |
2c14f28b | 327 | struct drm_device *dev = priv->minor->dev; |
55910517 | 328 | struct drm_sg_mem *entry = dev->sg; |
1da177e4 LT |
329 | unsigned long offset; |
330 | unsigned long map_offset; | |
331 | unsigned long page_offset; | |
332 | struct page *page; | |
333 | ||
b5e89ed5 | 334 | if (!entry) |
ca0b07d9 | 335 | return VM_FAULT_SIGBUS; /* Error */ |
b5e89ed5 | 336 | if (!entry->pagelist) |
ca0b07d9 | 337 | return VM_FAULT_SIGBUS; /* Nothing allocated */ |
1da177e4 | 338 | |
ca0b07d9 | 339 | offset = (unsigned long)vmf->virtual_address - vma->vm_start; |
d1f2b55a | 340 | map_offset = map->offset - (unsigned long)dev->sg->virtual; |
1da177e4 LT |
341 | page_offset = (offset >> PAGE_SHIFT) + (map_offset >> PAGE_SHIFT); |
342 | page = entry->pagelist[page_offset]; | |
343 | get_page(page); | |
ca0b07d9 | 344 | vmf->page = page; |
1da177e4 | 345 | |
ca0b07d9 | 346 | return 0; |
1da177e4 LT |
347 | } |
348 | ||
ca0b07d9 | 349 | static int drm_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
b5e89ed5 | 350 | { |
ca0b07d9 | 351 | return drm_do_vm_fault(vma, vmf); |
1da177e4 LT |
352 | } |
353 | ||
ca0b07d9 | 354 | static int drm_vm_shm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
b5e89ed5 | 355 | { |
ca0b07d9 | 356 | return drm_do_vm_shm_fault(vma, vmf); |
1da177e4 LT |
357 | } |
358 | ||
ca0b07d9 | 359 | static int drm_vm_dma_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
b5e89ed5 | 360 | { |
ca0b07d9 | 361 | return drm_do_vm_dma_fault(vma, vmf); |
1da177e4 LT |
362 | } |
363 | ||
ca0b07d9 | 364 | static int drm_vm_sg_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
b5e89ed5 | 365 | { |
ca0b07d9 | 366 | return drm_do_vm_sg_fault(vma, vmf); |
1da177e4 LT |
367 | } |
368 | ||
1da177e4 | 369 | /** AGP virtual memory operations */ |
b5e89ed5 | 370 | static struct vm_operations_struct drm_vm_ops = { |
ca0b07d9 | 371 | .fault = drm_vm_fault, |
b5e89ed5 DA |
372 | .open = drm_vm_open, |
373 | .close = drm_vm_close, | |
1da177e4 LT |
374 | }; |
375 | ||
376 | /** Shared virtual memory operations */ | |
b5e89ed5 | 377 | static struct vm_operations_struct drm_vm_shm_ops = { |
ca0b07d9 | 378 | .fault = drm_vm_shm_fault, |
b5e89ed5 DA |
379 | .open = drm_vm_open, |
380 | .close = drm_vm_shm_close, | |
1da177e4 LT |
381 | }; |
382 | ||
383 | /** DMA virtual memory operations */ | |
b5e89ed5 | 384 | static struct vm_operations_struct drm_vm_dma_ops = { |
ca0b07d9 | 385 | .fault = drm_vm_dma_fault, |
b5e89ed5 DA |
386 | .open = drm_vm_open, |
387 | .close = drm_vm_close, | |
1da177e4 LT |
388 | }; |
389 | ||
390 | /** Scatter-gather virtual memory operations */ | |
b5e89ed5 | 391 | static struct vm_operations_struct drm_vm_sg_ops = { |
ca0b07d9 | 392 | .fault = drm_vm_sg_fault, |
b5e89ed5 DA |
393 | .open = drm_vm_open, |
394 | .close = drm_vm_close, | |
1da177e4 LT |
395 | }; |
396 | ||
1da177e4 LT |
397 | /** |
398 | * \c open method for shared virtual memory. | |
b5e89ed5 | 399 | * |
1da177e4 | 400 | * \param vma virtual memory area. |
b5e89ed5 | 401 | * |
1da177e4 LT |
402 | * Create a new drm_vma_entry structure as the \p vma private data entry and |
403 | * add it to drm_device::vmalist. | |
404 | */ | |
a2c0a97b | 405 | void drm_vm_open_locked(struct vm_area_struct *vma) |
1da177e4 | 406 | { |
84b1fd10 | 407 | struct drm_file *priv = vma->vm_file->private_data; |
2c14f28b | 408 | struct drm_device *dev = priv->minor->dev; |
8fc2fdf4 | 409 | struct drm_vma_entry *vma_entry; |
1da177e4 LT |
410 | |
411 | DRM_DEBUG("0x%08lx,0x%08lx\n", | |
412 | vma->vm_start, vma->vm_end - vma->vm_start); | |
413 | atomic_inc(&dev->vma_count); | |
414 | ||
415 | vma_entry = drm_alloc(sizeof(*vma_entry), DRM_MEM_VMAS); | |
416 | if (vma_entry) { | |
b5e89ed5 | 417 | vma_entry->vma = vma; |
b5e89ed5 | 418 | vma_entry->pid = current->pid; |
bd1b331f | 419 | list_add(&vma_entry->head, &dev->vmalist); |
1da177e4 LT |
420 | } |
421 | } | |
422 | ||
d7d8aac7 TH |
423 | static void drm_vm_open(struct vm_area_struct *vma) |
424 | { | |
84b1fd10 | 425 | struct drm_file *priv = vma->vm_file->private_data; |
2c14f28b | 426 | struct drm_device *dev = priv->minor->dev; |
d7d8aac7 TH |
427 | |
428 | mutex_lock(&dev->struct_mutex); | |
429 | drm_vm_open_locked(vma); | |
430 | mutex_unlock(&dev->struct_mutex); | |
431 | } | |
432 | ||
1da177e4 LT |
433 | /** |
434 | * \c close method for all virtual memory types. | |
b5e89ed5 | 435 | * |
1da177e4 | 436 | * \param vma virtual memory area. |
b5e89ed5 | 437 | * |
1da177e4 LT |
438 | * Search the \p vma private data entry in drm_device::vmalist, unlink it, and |
439 | * free it. | |
440 | */ | |
c94f7029 | 441 | static void drm_vm_close(struct vm_area_struct *vma) |
1da177e4 | 442 | { |
84b1fd10 | 443 | struct drm_file *priv = vma->vm_file->private_data; |
2c14f28b | 444 | struct drm_device *dev = priv->minor->dev; |
8fc2fdf4 | 445 | struct drm_vma_entry *pt, *temp; |
1da177e4 LT |
446 | |
447 | DRM_DEBUG("0x%08lx,0x%08lx\n", | |
448 | vma->vm_start, vma->vm_end - vma->vm_start); | |
449 | atomic_dec(&dev->vma_count); | |
450 | ||
30e2fb18 | 451 | mutex_lock(&dev->struct_mutex); |
bd1b331f | 452 | list_for_each_entry_safe(pt, temp, &dev->vmalist, head) { |
1da177e4 | 453 | if (pt->vma == vma) { |
bd1b331f | 454 | list_del(&pt->head); |
1da177e4 LT |
455 | drm_free(pt, sizeof(*pt), DRM_MEM_VMAS); |
456 | break; | |
457 | } | |
458 | } | |
30e2fb18 | 459 | mutex_unlock(&dev->struct_mutex); |
1da177e4 LT |
460 | } |
461 | ||
462 | /** | |
463 | * mmap DMA memory. | |
464 | * | |
6c340eac | 465 | * \param file_priv DRM file private. |
1da177e4 LT |
466 | * \param vma virtual memory area. |
467 | * \return zero on success or a negative number on failure. | |
b5e89ed5 | 468 | * |
1da177e4 LT |
469 | * Sets the virtual memory area operations structure to vm_dma_ops, the file |
470 | * pointer, and calls vm_open(). | |
471 | */ | |
c94f7029 | 472 | static int drm_mmap_dma(struct file *filp, struct vm_area_struct *vma) |
1da177e4 | 473 | { |
84b1fd10 DA |
474 | struct drm_file *priv = filp->private_data; |
475 | struct drm_device *dev; | |
cdd55a29 | 476 | struct drm_device_dma *dma; |
b5e89ed5 | 477 | unsigned long length = vma->vm_end - vma->vm_start; |
1da177e4 | 478 | |
2c14f28b | 479 | dev = priv->minor->dev; |
b5e89ed5 | 480 | dma = dev->dma; |
1545085a TH |
481 | DRM_DEBUG("start = 0x%lx, end = 0x%lx, page offset = 0x%lx\n", |
482 | vma->vm_start, vma->vm_end, vma->vm_pgoff); | |
1da177e4 | 483 | |
b5e89ed5 | 484 | /* Length must match exact page count */ |
1da177e4 | 485 | if (!dma || (length >> PAGE_SHIFT) != dma->page_count) { |
1da177e4 LT |
486 | return -EINVAL; |
487 | } | |
1da177e4 | 488 | |
3417f33e GS |
489 | if (!capable(CAP_SYS_ADMIN) && |
490 | (dma->flags & _DRM_DMA_USE_PCI_RO)) { | |
491 | vma->vm_flags &= ~(VM_WRITE | VM_MAYWRITE); | |
492 | #if defined(__i386__) || defined(__x86_64__) | |
493 | pgprot_val(vma->vm_page_prot) &= ~_PAGE_RW; | |
494 | #else | |
495 | /* Ye gads this is ugly. With more thought | |
496 | we could move this up higher and use | |
497 | `protection_map' instead. */ | |
498 | vma->vm_page_prot = | |
499 | __pgprot(pte_val | |
500 | (pte_wrprotect | |
501 | (__pte(pgprot_val(vma->vm_page_prot))))); | |
502 | #endif | |
503 | } | |
504 | ||
b5e89ed5 | 505 | vma->vm_ops = &drm_vm_dma_ops; |
1da177e4 | 506 | |
b5e89ed5 | 507 | vma->vm_flags |= VM_RESERVED; /* Don't swap */ |
2f98735c | 508 | vma->vm_flags |= VM_DONTEXPAND; |
1da177e4 | 509 | |
b5e89ed5 | 510 | vma->vm_file = filp; /* Needed for drm_vm_open() */ |
d7d8aac7 | 511 | drm_vm_open_locked(vma); |
1da177e4 LT |
512 | return 0; |
513 | } | |
514 | ||
c60ce623 | 515 | unsigned long drm_core_get_map_ofs(struct drm_map * map) |
1da177e4 LT |
516 | { |
517 | return map->offset; | |
518 | } | |
b5e89ed5 | 519 | |
1da177e4 LT |
520 | EXPORT_SYMBOL(drm_core_get_map_ofs); |
521 | ||
522 | unsigned long drm_core_get_reg_ofs(struct drm_device *dev) | |
523 | { | |
524 | #ifdef __alpha__ | |
525 | return dev->hose->dense_mem_base - dev->hose->mem_space->start; | |
526 | #else | |
527 | return 0; | |
528 | #endif | |
529 | } | |
b5e89ed5 | 530 | |
1da177e4 LT |
531 | EXPORT_SYMBOL(drm_core_get_reg_ofs); |
532 | ||
533 | /** | |
534 | * mmap DMA memory. | |
535 | * | |
6c340eac | 536 | * \param file_priv DRM file private. |
1da177e4 LT |
537 | * \param vma virtual memory area. |
538 | * \return zero on success or a negative number on failure. | |
b5e89ed5 | 539 | * |
1da177e4 LT |
540 | * If the virtual memory area has no offset associated with it then it's a DMA |
541 | * area, so calls mmap_dma(). Otherwise searches the map in drm_device::maplist, | |
542 | * checks that the restricted flag is not set, sets the virtual memory operations | |
543 | * according to the mapping type and remaps the pages. Finally sets the file | |
544 | * pointer and calls vm_open(). | |
545 | */ | |
a2c0a97b | 546 | int drm_mmap_locked(struct file *filp, struct vm_area_struct *vma) |
1da177e4 | 547 | { |
84b1fd10 | 548 | struct drm_file *priv = filp->private_data; |
2c14f28b | 549 | struct drm_device *dev = priv->minor->dev; |
c60ce623 | 550 | struct drm_map *map = NULL; |
b5e89ed5 | 551 | unsigned long offset = 0; |
e0be428e | 552 | struct drm_hash_item *hash; |
1da177e4 | 553 | |
1545085a TH |
554 | DRM_DEBUG("start = 0x%lx, end = 0x%lx, page offset = 0x%lx\n", |
555 | vma->vm_start, vma->vm_end, vma->vm_pgoff); | |
1da177e4 | 556 | |
b5e89ed5 DA |
557 | if (!priv->authenticated) |
558 | return -EACCES; | |
1da177e4 LT |
559 | |
560 | /* We check for "dma". On Apple's UniNorth, it's valid to have | |
561 | * the AGP mapped at physical address 0 | |
562 | * --BenH. | |
563 | */ | |
1545085a | 564 | if (!vma->vm_pgoff |
1da177e4 | 565 | #if __OS_HAS_AGP |
b5e89ed5 DA |
566 | && (!dev->agp |
567 | || dev->agp->agp_info.device->vendor != PCI_VENDOR_ID_APPLE) | |
1da177e4 LT |
568 | #endif |
569 | ) | |
570 | return drm_mmap_dma(filp, vma); | |
571 | ||
1545085a | 572 | if (drm_ht_find_item(&dev->map_hash, vma->vm_pgoff, &hash)) { |
8d153f71 TH |
573 | DRM_ERROR("Could not find map\n"); |
574 | return -EINVAL; | |
1da177e4 LT |
575 | } |
576 | ||
55910517 | 577 | map = drm_hash_entry(hash, struct drm_map_list, hash)->map; |
b5e89ed5 | 578 | if (!map || ((map->flags & _DRM_RESTRICTED) && !capable(CAP_SYS_ADMIN))) |
1da177e4 LT |
579 | return -EPERM; |
580 | ||
b5e89ed5 | 581 | /* Check for valid size. */ |
54ba2f76 | 582 | if (map->size < vma->vm_end - vma->vm_start) |
b5e89ed5 | 583 | return -EINVAL; |
1da177e4 LT |
584 | |
585 | if (!capable(CAP_SYS_ADMIN) && (map->flags & _DRM_READ_ONLY)) { | |
586 | vma->vm_flags &= ~(VM_WRITE | VM_MAYWRITE); | |
587 | #if defined(__i386__) || defined(__x86_64__) | |
588 | pgprot_val(vma->vm_page_prot) &= ~_PAGE_RW; | |
589 | #else | |
b5e89ed5 DA |
590 | /* Ye gads this is ugly. With more thought |
591 | we could move this up higher and use | |
592 | `protection_map' instead. */ | |
593 | vma->vm_page_prot = | |
594 | __pgprot(pte_val | |
595 | (pte_wrprotect | |
596 | (__pte(pgprot_val(vma->vm_page_prot))))); | |
1da177e4 LT |
597 | #endif |
598 | } | |
599 | ||
600 | switch (map->type) { | |
b5e89ed5 DA |
601 | case _DRM_AGP: |
602 | if (drm_core_has_AGP(dev) && dev->agp->cant_use_aperture) { | |
603 | /* | |
604 | * On some platforms we can't talk to bus dma address from the CPU, so for | |
605 | * memory of type DRM_AGP, we'll deal with sorting out the real physical | |
ca0b07d9 | 606 | * pages and mappings in fault() |
b5e89ed5 | 607 | */ |
1da177e4 | 608 | #if defined(__powerpc__) |
b5e89ed5 | 609 | pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE; |
1da177e4 | 610 | #endif |
b5e89ed5 DA |
611 | vma->vm_ops = &drm_vm_ops; |
612 | break; | |
613 | } | |
614 | /* fall through to _DRM_FRAME_BUFFER... */ | |
1da177e4 LT |
615 | case _DRM_FRAME_BUFFER: |
616 | case _DRM_REGISTERS: | |
1da177e4 | 617 | offset = dev->driver->get_reg_ofs(dev); |
5cc7f9ab DA |
618 | vma->vm_flags |= VM_IO; /* not in core dump */ |
619 | vma->vm_page_prot = drm_io_prot(map->type, vma); | |
3d77461e | 620 | if (io_remap_pfn_range(vma, vma->vm_start, |
b5e89ed5 DA |
621 | (map->offset + offset) >> PAGE_SHIFT, |
622 | vma->vm_end - vma->vm_start, | |
623 | vma->vm_page_prot)) | |
b5e89ed5 | 624 | return -EAGAIN; |
1da177e4 LT |
625 | DRM_DEBUG(" Type = %d; start = 0x%lx, end = 0x%lx," |
626 | " offset = 0x%lx\n", | |
627 | map->type, | |
d1f2b55a | 628 | vma->vm_start, vma->vm_end, map->offset + offset); |
1da177e4 LT |
629 | vma->vm_ops = &drm_vm_ops; |
630 | break; | |
2d0f9eaf | 631 | case _DRM_CONSISTENT: |
38315878 | 632 | /* Consistent memory is really like shared memory. But |
ca0b07d9 | 633 | * it's allocated in a different way, so avoid fault */ |
38315878 HD |
634 | if (remap_pfn_range(vma, vma->vm_start, |
635 | page_to_pfn(virt_to_page(map->handle)), | |
636 | vma->vm_end - vma->vm_start, vma->vm_page_prot)) | |
637 | return -EAGAIN; | |
6876b3ba | 638 | vma->vm_page_prot = drm_dma_prot(map->type, vma); |
38315878 HD |
639 | /* fall through to _DRM_SHM */ |
640 | case _DRM_SHM: | |
1da177e4 LT |
641 | vma->vm_ops = &drm_vm_shm_ops; |
642 | vma->vm_private_data = (void *)map; | |
b5e89ed5 DA |
643 | /* Don't let this area swap. Change when |
644 | DRM_KERNEL advisory is supported. */ | |
1da177e4 | 645 | vma->vm_flags |= VM_RESERVED; |
1da177e4 LT |
646 | break; |
647 | case _DRM_SCATTER_GATHER: | |
648 | vma->vm_ops = &drm_vm_sg_ops; | |
649 | vma->vm_private_data = (void *)map; | |
1da177e4 | 650 | vma->vm_flags |= VM_RESERVED; |
5ff64611 | 651 | vma->vm_page_prot = drm_dma_prot(map->type, vma); |
b5e89ed5 | 652 | break; |
1da177e4 LT |
653 | default: |
654 | return -EINVAL; /* This should never happen. */ | |
655 | } | |
b5e89ed5 | 656 | vma->vm_flags |= VM_RESERVED; /* Don't swap */ |
2f98735c | 657 | vma->vm_flags |= VM_DONTEXPAND; |
1da177e4 | 658 | |
b5e89ed5 | 659 | vma->vm_file = filp; /* Needed for drm_vm_open() */ |
d7d8aac7 | 660 | drm_vm_open_locked(vma); |
1da177e4 LT |
661 | return 0; |
662 | } | |
b5e89ed5 | 663 | |
d7d8aac7 TH |
664 | int drm_mmap(struct file *filp, struct vm_area_struct *vma) |
665 | { | |
84b1fd10 | 666 | struct drm_file *priv = filp->private_data; |
2c14f28b | 667 | struct drm_device *dev = priv->minor->dev; |
d7d8aac7 TH |
668 | int ret; |
669 | ||
670 | mutex_lock(&dev->struct_mutex); | |
671 | ret = drm_mmap_locked(filp, vma); | |
672 | mutex_unlock(&dev->struct_mutex); | |
673 | ||
674 | return ret; | |
675 | } | |
1da177e4 | 676 | EXPORT_SYMBOL(drm_mmap); |