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 | ||
760285e7 | 36 | #include <drm/drmP.h> |
2d1a8a48 | 37 | #include <linux/export.h> |
1da177e4 LT |
38 | #if defined(__ia64__) |
39 | #include <linux/efi.h> | |
5a0e3ad6 | 40 | #include <linux/slab.h> |
1da177e4 LT |
41 | #endif |
42 | ||
c94f7029 DA |
43 | static void drm_vm_open(struct vm_area_struct *vma); |
44 | static void drm_vm_close(struct vm_area_struct *vma); | |
1da177e4 | 45 | |
ff47eaf2 AL |
46 | static pgprot_t drm_io_prot(struct drm_local_map *map, |
47 | struct vm_area_struct *vma) | |
5cc7f9ab DA |
48 | { |
49 | pgprot_t tmp = vm_get_page_prot(vma->vm_flags); | |
50 | ||
51 | #if defined(__i386__) || defined(__x86_64__) | |
f435046d AL |
52 | if (map->type == _DRM_REGISTERS && !(map->flags & _DRM_WRITE_COMBINING)) |
53 | tmp = pgprot_noncached(tmp); | |
54 | else | |
55 | tmp = pgprot_writecombine(tmp); | |
5cc7f9ab DA |
56 | #elif defined(__powerpc__) |
57 | pgprot_val(tmp) |= _PAGE_NO_CACHE; | |
ff47eaf2 | 58 | if (map->type == _DRM_REGISTERS) |
5cc7f9ab | 59 | pgprot_val(tmp) |= _PAGE_GUARDED; |
6876b3ba | 60 | #elif defined(__ia64__) |
5cc7f9ab DA |
61 | if (efi_range_is_wc(vma->vm_start, vma->vm_end - |
62 | vma->vm_start)) | |
63 | tmp = pgprot_writecombine(tmp); | |
64 | else | |
65 | tmp = pgprot_noncached(tmp); | |
04cf55e1 | 66 | #elif defined(__sparc__) || defined(__arm__) || defined(__mips__) |
6876b3ba BH |
67 | tmp = pgprot_noncached(tmp); |
68 | #endif | |
69 | return tmp; | |
70 | } | |
71 | ||
72 | static pgprot_t drm_dma_prot(uint32_t map_type, struct vm_area_struct *vma) | |
73 | { | |
74 | pgprot_t tmp = vm_get_page_prot(vma->vm_flags); | |
75 | ||
76 | #if defined(__powerpc__) && defined(CONFIG_NOT_COHERENT_CACHE) | |
77 | tmp |= _PAGE_NO_CACHE; | |
5cc7f9ab DA |
78 | #endif |
79 | return tmp; | |
80 | } | |
81 | ||
1da177e4 | 82 | /** |
ca0b07d9 | 83 | * \c fault method for AGP virtual memory. |
1da177e4 LT |
84 | * |
85 | * \param vma virtual memory area. | |
86 | * \param address access address. | |
87 | * \return pointer to the page structure. | |
b5e89ed5 | 88 | * |
1da177e4 LT |
89 | * Find the right map and if it's AGP memory find the real physical page to |
90 | * map, get the page, increment the use count and return it. | |
91 | */ | |
92 | #if __OS_HAS_AGP | |
ca0b07d9 | 93 | static int drm_do_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
1da177e4 | 94 | { |
84b1fd10 | 95 | struct drm_file *priv = vma->vm_file->private_data; |
2c14f28b | 96 | struct drm_device *dev = priv->minor->dev; |
f77d390c | 97 | struct drm_local_map *map = NULL; |
55910517 | 98 | struct drm_map_list *r_list; |
e0be428e | 99 | struct drm_hash_item *hash; |
1da177e4 LT |
100 | |
101 | /* | |
b5e89ed5 DA |
102 | * Find the right map |
103 | */ | |
1da177e4 | 104 | if (!drm_core_has_AGP(dev)) |
ca0b07d9 | 105 | goto vm_fault_error; |
1da177e4 | 106 | |
b5e89ed5 | 107 | if (!dev->agp || !dev->agp->cant_use_aperture) |
ca0b07d9 | 108 | goto vm_fault_error; |
1da177e4 | 109 | |
1545085a | 110 | if (drm_ht_find_item(&dev->map_hash, vma->vm_pgoff, &hash)) |
ca0b07d9 | 111 | goto vm_fault_error; |
8d153f71 | 112 | |
55910517 | 113 | r_list = drm_hash_entry(hash, struct drm_map_list, hash); |
8d153f71 | 114 | map = r_list->map; |
1da177e4 LT |
115 | |
116 | if (map && map->type == _DRM_AGP) { | |
ca0b07d9 NP |
117 | /* |
118 | * Using vm_pgoff as a selector forces us to use this unusual | |
119 | * addressing scheme. | |
120 | */ | |
41c2e75e BH |
121 | resource_size_t offset = (unsigned long)vmf->virtual_address - |
122 | vma->vm_start; | |
123 | resource_size_t baddr = map->offset + offset; | |
1da177e4 LT |
124 | struct drm_agp_mem *agpmem; |
125 | struct page *page; | |
126 | ||
127 | #ifdef __alpha__ | |
128 | /* | |
b5e89ed5 DA |
129 | * Adjust to a bus-relative address |
130 | */ | |
1da177e4 LT |
131 | baddr -= dev->hose->mem_space->start; |
132 | #endif | |
133 | ||
134 | /* | |
b5e89ed5 DA |
135 | * It's AGP memory - find the real physical page to map |
136 | */ | |
bd1b331f | 137 | list_for_each_entry(agpmem, &dev->agp->memory, head) { |
1da177e4 | 138 | if (agpmem->bound <= baddr && |
b5e89ed5 | 139 | agpmem->bound + agpmem->pages * PAGE_SIZE > baddr) |
1da177e4 LT |
140 | break; |
141 | } | |
142 | ||
161c4810 | 143 | if (&agpmem->head == &dev->agp->memory) |
ca0b07d9 | 144 | goto vm_fault_error; |
1da177e4 LT |
145 | |
146 | /* | |
b5e89ed5 DA |
147 | * Get the page, inc the use count, and return it |
148 | */ | |
1da177e4 | 149 | offset = (baddr - agpmem->bound) >> PAGE_SHIFT; |
07613ba2 | 150 | page = agpmem->memory->pages[offset]; |
1da177e4 | 151 | get_page(page); |
ca0b07d9 | 152 | vmf->page = page; |
1da177e4 | 153 | |
b5e89ed5 | 154 | DRM_DEBUG |
41c2e75e BH |
155 | ("baddr = 0x%llx page = 0x%p, offset = 0x%llx, count=%d\n", |
156 | (unsigned long long)baddr, | |
07613ba2 | 157 | agpmem->memory->pages[offset], |
41c2e75e | 158 | (unsigned long long)offset, |
b5e89ed5 | 159 | page_count(page)); |
ca0b07d9 | 160 | return 0; |
b5e89ed5 | 161 | } |
ca0b07d9 NP |
162 | vm_fault_error: |
163 | return VM_FAULT_SIGBUS; /* Disallow mremap */ | |
1da177e4 | 164 | } |
b5e89ed5 | 165 | #else /* __OS_HAS_AGP */ |
ca0b07d9 | 166 | static int drm_do_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
1da177e4 | 167 | { |
ca0b07d9 | 168 | return VM_FAULT_SIGBUS; |
1da177e4 | 169 | } |
b5e89ed5 | 170 | #endif /* __OS_HAS_AGP */ |
1da177e4 LT |
171 | |
172 | /** | |
173 | * \c nopage method for shared virtual memory. | |
174 | * | |
175 | * \param vma virtual memory area. | |
176 | * \param address access address. | |
177 | * \return pointer to the page structure. | |
b5e89ed5 | 178 | * |
59c51591 | 179 | * Get the mapping, find the real physical page to map, get the page, and |
1da177e4 LT |
180 | * return it. |
181 | */ | |
ca0b07d9 | 182 | static int drm_do_vm_shm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
1da177e4 | 183 | { |
f77d390c | 184 | struct drm_local_map *map = vma->vm_private_data; |
b5e89ed5 DA |
185 | unsigned long offset; |
186 | unsigned long i; | |
187 | struct page *page; | |
1da177e4 | 188 | |
b5e89ed5 | 189 | if (!map) |
ca0b07d9 | 190 | return VM_FAULT_SIGBUS; /* Nothing allocated */ |
1da177e4 | 191 | |
ca0b07d9 | 192 | offset = (unsigned long)vmf->virtual_address - vma->vm_start; |
1da177e4 | 193 | i = (unsigned long)map->handle + offset; |
38315878 | 194 | page = vmalloc_to_page((void *)i); |
1da177e4 | 195 | if (!page) |
ca0b07d9 | 196 | return VM_FAULT_SIGBUS; |
1da177e4 | 197 | get_page(page); |
ca0b07d9 | 198 | vmf->page = page; |
1da177e4 | 199 | |
ca0b07d9 NP |
200 | DRM_DEBUG("shm_fault 0x%lx\n", offset); |
201 | return 0; | |
1da177e4 LT |
202 | } |
203 | ||
1da177e4 LT |
204 | /** |
205 | * \c close method for shared virtual memory. | |
b5e89ed5 | 206 | * |
1da177e4 | 207 | * \param vma virtual memory area. |
b5e89ed5 | 208 | * |
1da177e4 LT |
209 | * Deletes map information if we are the last |
210 | * person to close a mapping and it's not in the global maplist. | |
211 | */ | |
c94f7029 | 212 | static void drm_vm_shm_close(struct vm_area_struct *vma) |
1da177e4 | 213 | { |
84b1fd10 | 214 | struct drm_file *priv = vma->vm_file->private_data; |
2c14f28b | 215 | struct drm_device *dev = priv->minor->dev; |
8fc2fdf4 | 216 | struct drm_vma_entry *pt, *temp; |
f77d390c | 217 | struct drm_local_map *map; |
55910517 | 218 | struct drm_map_list *r_list; |
1da177e4 LT |
219 | int found_maps = 0; |
220 | ||
221 | DRM_DEBUG("0x%08lx,0x%08lx\n", | |
222 | vma->vm_start, vma->vm_end - vma->vm_start); | |
223 | atomic_dec(&dev->vma_count); | |
224 | ||
225 | map = vma->vm_private_data; | |
226 | ||
30e2fb18 | 227 | mutex_lock(&dev->struct_mutex); |
bd1b331f | 228 | list_for_each_entry_safe(pt, temp, &dev->vmalist, head) { |
b5e89ed5 DA |
229 | if (pt->vma->vm_private_data == map) |
230 | found_maps++; | |
1da177e4 | 231 | if (pt->vma == vma) { |
bd1b331f | 232 | list_del(&pt->head); |
9a298b2a | 233 | kfree(pt); |
1da177e4 LT |
234 | } |
235 | } | |
bd1b331f | 236 | |
1da177e4 | 237 | /* We were the only map that was found */ |
b5e89ed5 | 238 | if (found_maps == 1 && map->flags & _DRM_REMOVABLE) { |
1da177e4 LT |
239 | /* Check to see if we are in the maplist, if we are not, then |
240 | * we delete this mappings information. | |
241 | */ | |
242 | found_maps = 0; | |
bd1b331f | 243 | list_for_each_entry(r_list, &dev->maplist, head) { |
b5e89ed5 DA |
244 | if (r_list->map == map) |
245 | found_maps++; | |
1da177e4 LT |
246 | } |
247 | ||
b5e89ed5 | 248 | if (!found_maps) { |
9c8da5eb DA |
249 | drm_dma_handle_t dmah; |
250 | ||
1da177e4 LT |
251 | switch (map->type) { |
252 | case _DRM_REGISTERS: | |
253 | case _DRM_FRAME_BUFFER: | |
ff47eaf2 AL |
254 | if (drm_core_has_MTRR(dev)) |
255 | arch_phys_wc_del(map->mtrr); | |
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 | 273 | } |
9a298b2a | 274 | kfree(map); |
1da177e4 LT |
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 | { |
f77d390c | 325 | struct drm_local_map *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 */ |
f0f37e2f | 370 | static const 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 */ | |
f0f37e2f | 377 | static const 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 */ | |
f0f37e2f | 384 | static const 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 */ | |
f0f37e2f | 391 | static const 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 | */ | |
b06d66be RC |
405 | void drm_vm_open_locked(struct drm_device *dev, |
406 | struct vm_area_struct *vma) | |
1da177e4 | 407 | { |
8fc2fdf4 | 408 | struct drm_vma_entry *vma_entry; |
1da177e4 LT |
409 | |
410 | DRM_DEBUG("0x%08lx,0x%08lx\n", | |
411 | vma->vm_start, vma->vm_end - vma->vm_start); | |
412 | atomic_inc(&dev->vma_count); | |
413 | ||
9a298b2a | 414 | vma_entry = kmalloc(sizeof(*vma_entry), GFP_KERNEL); |
1da177e4 | 415 | if (vma_entry) { |
b5e89ed5 | 416 | vma_entry->vma = vma; |
b5e89ed5 | 417 | vma_entry->pid = current->pid; |
bd1b331f | 418 | list_add(&vma_entry->head, &dev->vmalist); |
1da177e4 LT |
419 | } |
420 | } | |
d5028995 | 421 | EXPORT_SYMBOL_GPL(drm_vm_open_locked); |
1da177e4 | 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); | |
b06d66be | 429 | drm_vm_open_locked(dev, vma); |
d7d8aac7 TH |
430 | mutex_unlock(&dev->struct_mutex); |
431 | } | |
432 | ||
b06d66be RC |
433 | void drm_vm_close_locked(struct drm_device *dev, |
434 | struct vm_area_struct *vma) | |
1da177e4 | 435 | { |
8fc2fdf4 | 436 | struct drm_vma_entry *pt, *temp; |
1da177e4 LT |
437 | |
438 | DRM_DEBUG("0x%08lx,0x%08lx\n", | |
439 | vma->vm_start, vma->vm_end - vma->vm_start); | |
440 | atomic_dec(&dev->vma_count); | |
441 | ||
bd1b331f | 442 | list_for_each_entry_safe(pt, temp, &dev->vmalist, head) { |
1da177e4 | 443 | if (pt->vma == vma) { |
bd1b331f | 444 | list_del(&pt->head); |
9a298b2a | 445 | kfree(pt); |
1da177e4 LT |
446 | break; |
447 | } | |
448 | } | |
31dfbc93 CW |
449 | } |
450 | ||
451 | /** | |
452 | * \c close method for all virtual memory types. | |
453 | * | |
454 | * \param vma virtual memory area. | |
455 | * | |
456 | * Search the \p vma private data entry in drm_device::vmalist, unlink it, and | |
457 | * free it. | |
458 | */ | |
459 | static void drm_vm_close(struct vm_area_struct *vma) | |
460 | { | |
461 | struct drm_file *priv = vma->vm_file->private_data; | |
462 | struct drm_device *dev = priv->minor->dev; | |
463 | ||
464 | mutex_lock(&dev->struct_mutex); | |
b06d66be | 465 | drm_vm_close_locked(dev, vma); |
30e2fb18 | 466 | mutex_unlock(&dev->struct_mutex); |
1da177e4 LT |
467 | } |
468 | ||
469 | /** | |
470 | * mmap DMA memory. | |
471 | * | |
6c340eac | 472 | * \param file_priv DRM file private. |
1da177e4 LT |
473 | * \param vma virtual memory area. |
474 | * \return zero on success or a negative number on failure. | |
b5e89ed5 | 475 | * |
1da177e4 LT |
476 | * Sets the virtual memory area operations structure to vm_dma_ops, the file |
477 | * pointer, and calls vm_open(). | |
478 | */ | |
c94f7029 | 479 | static int drm_mmap_dma(struct file *filp, struct vm_area_struct *vma) |
1da177e4 | 480 | { |
84b1fd10 DA |
481 | struct drm_file *priv = filp->private_data; |
482 | struct drm_device *dev; | |
cdd55a29 | 483 | struct drm_device_dma *dma; |
b5e89ed5 | 484 | unsigned long length = vma->vm_end - vma->vm_start; |
1da177e4 | 485 | |
2c14f28b | 486 | dev = priv->minor->dev; |
b5e89ed5 | 487 | dma = dev->dma; |
1545085a TH |
488 | DRM_DEBUG("start = 0x%lx, end = 0x%lx, page offset = 0x%lx\n", |
489 | vma->vm_start, vma->vm_end, vma->vm_pgoff); | |
1da177e4 | 490 | |
b5e89ed5 | 491 | /* Length must match exact page count */ |
1da177e4 | 492 | if (!dma || (length >> PAGE_SHIFT) != dma->page_count) { |
1da177e4 LT |
493 | return -EINVAL; |
494 | } | |
1da177e4 | 495 | |
3417f33e GS |
496 | if (!capable(CAP_SYS_ADMIN) && |
497 | (dma->flags & _DRM_DMA_USE_PCI_RO)) { | |
498 | vma->vm_flags &= ~(VM_WRITE | VM_MAYWRITE); | |
499 | #if defined(__i386__) || defined(__x86_64__) | |
500 | pgprot_val(vma->vm_page_prot) &= ~_PAGE_RW; | |
501 | #else | |
502 | /* Ye gads this is ugly. With more thought | |
503 | we could move this up higher and use | |
504 | `protection_map' instead. */ | |
505 | vma->vm_page_prot = | |
506 | __pgprot(pte_val | |
507 | (pte_wrprotect | |
508 | (__pte(pgprot_val(vma->vm_page_prot))))); | |
509 | #endif | |
510 | } | |
511 | ||
b5e89ed5 | 512 | vma->vm_ops = &drm_vm_dma_ops; |
1da177e4 | 513 | |
314e51b9 | 514 | vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; |
1da177e4 | 515 | |
b06d66be | 516 | drm_vm_open_locked(dev, vma); |
1da177e4 LT |
517 | return 0; |
518 | } | |
519 | ||
cbc60ca0 | 520 | static resource_size_t drm_core_get_reg_ofs(struct drm_device *dev) |
1da177e4 LT |
521 | { |
522 | #ifdef __alpha__ | |
82ba3fef | 523 | return dev->hose->dense_mem_base; |
1da177e4 LT |
524 | #else |
525 | return 0; | |
526 | #endif | |
527 | } | |
b5e89ed5 | 528 | |
1da177e4 LT |
529 | /** |
530 | * mmap DMA memory. | |
531 | * | |
6c340eac | 532 | * \param file_priv DRM file private. |
1da177e4 LT |
533 | * \param vma virtual memory area. |
534 | * \return zero on success or a negative number on failure. | |
b5e89ed5 | 535 | * |
1da177e4 LT |
536 | * If the virtual memory area has no offset associated with it then it's a DMA |
537 | * area, so calls mmap_dma(). Otherwise searches the map in drm_device::maplist, | |
538 | * checks that the restricted flag is not set, sets the virtual memory operations | |
539 | * according to the mapping type and remaps the pages. Finally sets the file | |
540 | * pointer and calls vm_open(). | |
541 | */ | |
a2c0a97b | 542 | int drm_mmap_locked(struct file *filp, struct vm_area_struct *vma) |
1da177e4 | 543 | { |
84b1fd10 | 544 | struct drm_file *priv = filp->private_data; |
2c14f28b | 545 | struct drm_device *dev = priv->minor->dev; |
f77d390c | 546 | struct drm_local_map *map = NULL; |
41c2e75e | 547 | resource_size_t offset = 0; |
e0be428e | 548 | struct drm_hash_item *hash; |
1da177e4 | 549 | |
1545085a TH |
550 | DRM_DEBUG("start = 0x%lx, end = 0x%lx, page offset = 0x%lx\n", |
551 | vma->vm_start, vma->vm_end, vma->vm_pgoff); | |
1da177e4 | 552 | |
b5e89ed5 DA |
553 | if (!priv->authenticated) |
554 | return -EACCES; | |
1da177e4 LT |
555 | |
556 | /* We check for "dma". On Apple's UniNorth, it's valid to have | |
557 | * the AGP mapped at physical address 0 | |
558 | * --BenH. | |
559 | */ | |
1545085a | 560 | if (!vma->vm_pgoff |
1da177e4 | 561 | #if __OS_HAS_AGP |
b5e89ed5 DA |
562 | && (!dev->agp |
563 | || dev->agp->agp_info.device->vendor != PCI_VENDOR_ID_APPLE) | |
1da177e4 LT |
564 | #endif |
565 | ) | |
566 | return drm_mmap_dma(filp, vma); | |
567 | ||
1545085a | 568 | if (drm_ht_find_item(&dev->map_hash, vma->vm_pgoff, &hash)) { |
8d153f71 TH |
569 | DRM_ERROR("Could not find map\n"); |
570 | return -EINVAL; | |
1da177e4 LT |
571 | } |
572 | ||
55910517 | 573 | map = drm_hash_entry(hash, struct drm_map_list, hash)->map; |
b5e89ed5 | 574 | if (!map || ((map->flags & _DRM_RESTRICTED) && !capable(CAP_SYS_ADMIN))) |
1da177e4 LT |
575 | return -EPERM; |
576 | ||
b5e89ed5 | 577 | /* Check for valid size. */ |
54ba2f76 | 578 | if (map->size < vma->vm_end - vma->vm_start) |
b5e89ed5 | 579 | return -EINVAL; |
1da177e4 LT |
580 | |
581 | if (!capable(CAP_SYS_ADMIN) && (map->flags & _DRM_READ_ONLY)) { | |
582 | vma->vm_flags &= ~(VM_WRITE | VM_MAYWRITE); | |
583 | #if defined(__i386__) || defined(__x86_64__) | |
584 | pgprot_val(vma->vm_page_prot) &= ~_PAGE_RW; | |
585 | #else | |
b5e89ed5 DA |
586 | /* Ye gads this is ugly. With more thought |
587 | we could move this up higher and use | |
588 | `protection_map' instead. */ | |
589 | vma->vm_page_prot = | |
590 | __pgprot(pte_val | |
591 | (pte_wrprotect | |
592 | (__pte(pgprot_val(vma->vm_page_prot))))); | |
1da177e4 LT |
593 | #endif |
594 | } | |
595 | ||
596 | switch (map->type) { | |
4b7fb9b5 | 597 | #if !defined(__arm__) |
b5e89ed5 DA |
598 | case _DRM_AGP: |
599 | if (drm_core_has_AGP(dev) && dev->agp->cant_use_aperture) { | |
600 | /* | |
601 | * On some platforms we can't talk to bus dma address from the CPU, so for | |
602 | * memory of type DRM_AGP, we'll deal with sorting out the real physical | |
ca0b07d9 | 603 | * pages and mappings in fault() |
b5e89ed5 | 604 | */ |
1da177e4 | 605 | #if defined(__powerpc__) |
b5e89ed5 | 606 | pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE; |
1da177e4 | 607 | #endif |
b5e89ed5 DA |
608 | vma->vm_ops = &drm_vm_ops; |
609 | break; | |
610 | } | |
611 | /* fall through to _DRM_FRAME_BUFFER... */ | |
4b7fb9b5 | 612 | #endif |
1da177e4 LT |
613 | case _DRM_FRAME_BUFFER: |
614 | case _DRM_REGISTERS: | |
cbc60ca0 | 615 | offset = drm_core_get_reg_ofs(dev); |
ff47eaf2 | 616 | vma->vm_page_prot = drm_io_prot(map, vma); |
3d77461e | 617 | if (io_remap_pfn_range(vma, vma->vm_start, |
b5e89ed5 DA |
618 | (map->offset + offset) >> PAGE_SHIFT, |
619 | vma->vm_end - vma->vm_start, | |
620 | vma->vm_page_prot)) | |
b5e89ed5 | 621 | return -EAGAIN; |
1da177e4 | 622 | DRM_DEBUG(" Type = %d; start = 0x%lx, end = 0x%lx," |
41c2e75e | 623 | " offset = 0x%llx\n", |
1da177e4 | 624 | map->type, |
41c2e75e | 625 | vma->vm_start, vma->vm_end, (unsigned long long)(map->offset + offset)); |
4b7fb9b5 | 626 | |
1da177e4 LT |
627 | vma->vm_ops = &drm_vm_ops; |
628 | break; | |
2d0f9eaf | 629 | case _DRM_CONSISTENT: |
38315878 | 630 | /* Consistent memory is really like shared memory. But |
ca0b07d9 | 631 | * it's allocated in a different way, so avoid fault */ |
38315878 HD |
632 | if (remap_pfn_range(vma, vma->vm_start, |
633 | page_to_pfn(virt_to_page(map->handle)), | |
634 | vma->vm_end - vma->vm_start, vma->vm_page_prot)) | |
635 | return -EAGAIN; | |
6876b3ba | 636 | vma->vm_page_prot = drm_dma_prot(map->type, vma); |
38315878 HD |
637 | /* fall through to _DRM_SHM */ |
638 | case _DRM_SHM: | |
1da177e4 LT |
639 | vma->vm_ops = &drm_vm_shm_ops; |
640 | vma->vm_private_data = (void *)map; | |
1da177e4 LT |
641 | break; |
642 | case _DRM_SCATTER_GATHER: | |
643 | vma->vm_ops = &drm_vm_sg_ops; | |
644 | vma->vm_private_data = (void *)map; | |
5ff64611 | 645 | vma->vm_page_prot = drm_dma_prot(map->type, vma); |
b5e89ed5 | 646 | break; |
1da177e4 LT |
647 | default: |
648 | return -EINVAL; /* This should never happen. */ | |
649 | } | |
314e51b9 | 650 | vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; |
1da177e4 | 651 | |
b06d66be | 652 | drm_vm_open_locked(dev, vma); |
1da177e4 LT |
653 | return 0; |
654 | } | |
b5e89ed5 | 655 | |
d7d8aac7 TH |
656 | int drm_mmap(struct file *filp, struct vm_area_struct *vma) |
657 | { | |
84b1fd10 | 658 | struct drm_file *priv = filp->private_data; |
2c14f28b | 659 | struct drm_device *dev = priv->minor->dev; |
d7d8aac7 TH |
660 | int ret; |
661 | ||
2c07a21d DA |
662 | if (drm_device_is_unplugged(dev)) |
663 | return -ENODEV; | |
664 | ||
d7d8aac7 TH |
665 | mutex_lock(&dev->struct_mutex); |
666 | ret = drm_mmap_locked(filp, vma); | |
667 | mutex_unlock(&dev->struct_mutex); | |
668 | ||
669 | return ret; | |
670 | } | |
1da177e4 | 671 | EXPORT_SYMBOL(drm_mmap); |