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; |
f77d390c | 94 | struct drm_local_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 | */ | |
41c2e75e BH |
118 | resource_size_t offset = (unsigned long)vmf->virtual_address - |
119 | vma->vm_start; | |
120 | resource_size_t 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 | 146 | offset = (baddr - agpmem->bound) >> PAGE_SHIFT; |
07613ba2 | 147 | page = agpmem->memory->pages[offset]; |
1da177e4 | 148 | get_page(page); |
ca0b07d9 | 149 | vmf->page = page; |
1da177e4 | 150 | |
b5e89ed5 | 151 | DRM_DEBUG |
41c2e75e BH |
152 | ("baddr = 0x%llx page = 0x%p, offset = 0x%llx, count=%d\n", |
153 | (unsigned long long)baddr, | |
07613ba2 | 154 | agpmem->memory->pages[offset], |
41c2e75e | 155 | (unsigned long long)offset, |
b5e89ed5 | 156 | page_count(page)); |
ca0b07d9 | 157 | return 0; |
b5e89ed5 | 158 | } |
ca0b07d9 NP |
159 | vm_fault_error: |
160 | return VM_FAULT_SIGBUS; /* Disallow mremap */ | |
1da177e4 | 161 | } |
b5e89ed5 | 162 | #else /* __OS_HAS_AGP */ |
ca0b07d9 | 163 | static int drm_do_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
1da177e4 | 164 | { |
ca0b07d9 | 165 | return VM_FAULT_SIGBUS; |
1da177e4 | 166 | } |
b5e89ed5 | 167 | #endif /* __OS_HAS_AGP */ |
1da177e4 LT |
168 | |
169 | /** | |
170 | * \c nopage method for shared virtual memory. | |
171 | * | |
172 | * \param vma virtual memory area. | |
173 | * \param address access address. | |
174 | * \return pointer to the page structure. | |
b5e89ed5 | 175 | * |
59c51591 | 176 | * Get the mapping, find the real physical page to map, get the page, and |
1da177e4 LT |
177 | * return it. |
178 | */ | |
ca0b07d9 | 179 | static int drm_do_vm_shm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
1da177e4 | 180 | { |
f77d390c | 181 | struct drm_local_map *map = vma->vm_private_data; |
b5e89ed5 DA |
182 | unsigned long offset; |
183 | unsigned long i; | |
184 | struct page *page; | |
1da177e4 | 185 | |
b5e89ed5 | 186 | if (!map) |
ca0b07d9 | 187 | return VM_FAULT_SIGBUS; /* Nothing allocated */ |
1da177e4 | 188 | |
ca0b07d9 | 189 | offset = (unsigned long)vmf->virtual_address - vma->vm_start; |
1da177e4 | 190 | i = (unsigned long)map->handle + offset; |
38315878 | 191 | page = vmalloc_to_page((void *)i); |
1da177e4 | 192 | if (!page) |
ca0b07d9 | 193 | return VM_FAULT_SIGBUS; |
1da177e4 | 194 | get_page(page); |
ca0b07d9 | 195 | vmf->page = page; |
1da177e4 | 196 | |
ca0b07d9 NP |
197 | DRM_DEBUG("shm_fault 0x%lx\n", offset); |
198 | return 0; | |
1da177e4 LT |
199 | } |
200 | ||
1da177e4 LT |
201 | /** |
202 | * \c close method for shared virtual memory. | |
b5e89ed5 | 203 | * |
1da177e4 | 204 | * \param vma virtual memory area. |
b5e89ed5 | 205 | * |
1da177e4 LT |
206 | * Deletes map information if we are the last |
207 | * person to close a mapping and it's not in the global maplist. | |
208 | */ | |
c94f7029 | 209 | static void drm_vm_shm_close(struct vm_area_struct *vma) |
1da177e4 | 210 | { |
84b1fd10 | 211 | struct drm_file *priv = vma->vm_file->private_data; |
2c14f28b | 212 | struct drm_device *dev = priv->minor->dev; |
8fc2fdf4 | 213 | struct drm_vma_entry *pt, *temp; |
f77d390c | 214 | struct drm_local_map *map; |
55910517 | 215 | struct drm_map_list *r_list; |
1da177e4 LT |
216 | int found_maps = 0; |
217 | ||
218 | DRM_DEBUG("0x%08lx,0x%08lx\n", | |
219 | vma->vm_start, vma->vm_end - vma->vm_start); | |
220 | atomic_dec(&dev->vma_count); | |
221 | ||
222 | map = vma->vm_private_data; | |
223 | ||
30e2fb18 | 224 | mutex_lock(&dev->struct_mutex); |
bd1b331f | 225 | list_for_each_entry_safe(pt, temp, &dev->vmalist, head) { |
b5e89ed5 DA |
226 | if (pt->vma->vm_private_data == map) |
227 | found_maps++; | |
1da177e4 | 228 | if (pt->vma == vma) { |
bd1b331f | 229 | list_del(&pt->head); |
9a298b2a | 230 | kfree(pt); |
1da177e4 LT |
231 | } |
232 | } | |
bd1b331f | 233 | |
1da177e4 | 234 | /* We were the only map that was found */ |
b5e89ed5 | 235 | if (found_maps == 1 && map->flags & _DRM_REMOVABLE) { |
1da177e4 LT |
236 | /* Check to see if we are in the maplist, if we are not, then |
237 | * we delete this mappings information. | |
238 | */ | |
239 | found_maps = 0; | |
bd1b331f | 240 | list_for_each_entry(r_list, &dev->maplist, head) { |
b5e89ed5 DA |
241 | if (r_list->map == map) |
242 | found_maps++; | |
1da177e4 LT |
243 | } |
244 | ||
b5e89ed5 | 245 | if (!found_maps) { |
9c8da5eb DA |
246 | drm_dma_handle_t dmah; |
247 | ||
1da177e4 LT |
248 | switch (map->type) { |
249 | case _DRM_REGISTERS: | |
250 | case _DRM_FRAME_BUFFER: | |
251 | if (drm_core_has_MTRR(dev) && map->mtrr >= 0) { | |
252 | int retcode; | |
253 | retcode = mtrr_del(map->mtrr, | |
254 | map->offset, | |
255 | map->size); | |
256 | DRM_DEBUG("mtrr_del = %d\n", retcode); | |
257 | } | |
004a7727 | 258 | iounmap(map->handle); |
1da177e4 LT |
259 | break; |
260 | case _DRM_SHM: | |
261 | vfree(map->handle); | |
262 | break; | |
263 | case _DRM_AGP: | |
264 | case _DRM_SCATTER_GATHER: | |
265 | break; | |
2d0f9eaf | 266 | case _DRM_CONSISTENT: |
9c8da5eb DA |
267 | dmah.vaddr = map->handle; |
268 | dmah.busaddr = map->offset; | |
269 | dmah.size = map->size; | |
270 | __drm_pci_free(dev, &dmah); | |
2d0f9eaf | 271 | break; |
a2c0a97b JB |
272 | case _DRM_GEM: |
273 | DRM_ERROR("tried to rmmap GEM object\n"); | |
274 | break; | |
1da177e4 | 275 | } |
9a298b2a | 276 | kfree(map); |
1da177e4 LT |
277 | } |
278 | } | |
30e2fb18 | 279 | mutex_unlock(&dev->struct_mutex); |
1da177e4 LT |
280 | } |
281 | ||
282 | /** | |
ca0b07d9 | 283 | * \c fault method for DMA virtual memory. |
1da177e4 LT |
284 | * |
285 | * \param vma virtual memory area. | |
286 | * \param address access address. | |
287 | * \return pointer to the page structure. | |
b5e89ed5 | 288 | * |
1da177e4 LT |
289 | * Determine the page number from the page offset and get it from drm_device_dma::pagelist. |
290 | */ | |
ca0b07d9 | 291 | static int drm_do_vm_dma_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
1da177e4 | 292 | { |
84b1fd10 | 293 | struct drm_file *priv = vma->vm_file->private_data; |
2c14f28b | 294 | struct drm_device *dev = priv->minor->dev; |
cdd55a29 | 295 | struct drm_device_dma *dma = dev->dma; |
b5e89ed5 DA |
296 | unsigned long offset; |
297 | unsigned long page_nr; | |
298 | struct page *page; | |
299 | ||
300 | if (!dma) | |
ca0b07d9 | 301 | return VM_FAULT_SIGBUS; /* Error */ |
b5e89ed5 | 302 | if (!dma->pagelist) |
ca0b07d9 | 303 | return VM_FAULT_SIGBUS; /* Nothing allocated */ |
b5e89ed5 | 304 | |
ca0b07d9 NP |
305 | offset = (unsigned long)vmf->virtual_address - vma->vm_start; /* vm_[pg]off[set] should be 0 */ |
306 | page_nr = offset >> PAGE_SHIFT; /* page_nr could just be vmf->pgoff */ | |
b5e89ed5 | 307 | page = virt_to_page((dma->pagelist[page_nr] + (offset & (~PAGE_MASK)))); |
1da177e4 LT |
308 | |
309 | get_page(page); | |
ca0b07d9 | 310 | vmf->page = page; |
1da177e4 | 311 | |
ca0b07d9 NP |
312 | DRM_DEBUG("dma_fault 0x%lx (page %lu)\n", offset, page_nr); |
313 | return 0; | |
1da177e4 LT |
314 | } |
315 | ||
316 | /** | |
ca0b07d9 | 317 | * \c fault method for scatter-gather virtual memory. |
1da177e4 LT |
318 | * |
319 | * \param vma virtual memory area. | |
320 | * \param address access address. | |
321 | * \return pointer to the page structure. | |
b5e89ed5 | 322 | * |
1da177e4 LT |
323 | * Determine the map offset from the page offset and get it from drm_sg_mem::pagelist. |
324 | */ | |
ca0b07d9 | 325 | static int drm_do_vm_sg_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
1da177e4 | 326 | { |
f77d390c | 327 | struct drm_local_map *map = vma->vm_private_data; |
84b1fd10 | 328 | struct drm_file *priv = vma->vm_file->private_data; |
2c14f28b | 329 | struct drm_device *dev = priv->minor->dev; |
55910517 | 330 | struct drm_sg_mem *entry = dev->sg; |
1da177e4 LT |
331 | unsigned long offset; |
332 | unsigned long map_offset; | |
333 | unsigned long page_offset; | |
334 | struct page *page; | |
335 | ||
b5e89ed5 | 336 | if (!entry) |
ca0b07d9 | 337 | return VM_FAULT_SIGBUS; /* Error */ |
b5e89ed5 | 338 | if (!entry->pagelist) |
ca0b07d9 | 339 | return VM_FAULT_SIGBUS; /* Nothing allocated */ |
1da177e4 | 340 | |
ca0b07d9 | 341 | offset = (unsigned long)vmf->virtual_address - vma->vm_start; |
d1f2b55a | 342 | map_offset = map->offset - (unsigned long)dev->sg->virtual; |
1da177e4 LT |
343 | page_offset = (offset >> PAGE_SHIFT) + (map_offset >> PAGE_SHIFT); |
344 | page = entry->pagelist[page_offset]; | |
345 | get_page(page); | |
ca0b07d9 | 346 | vmf->page = page; |
1da177e4 | 347 | |
ca0b07d9 | 348 | return 0; |
1da177e4 LT |
349 | } |
350 | ||
ca0b07d9 | 351 | static int drm_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
b5e89ed5 | 352 | { |
ca0b07d9 | 353 | return drm_do_vm_fault(vma, vmf); |
1da177e4 LT |
354 | } |
355 | ||
ca0b07d9 | 356 | static int drm_vm_shm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
b5e89ed5 | 357 | { |
ca0b07d9 | 358 | return drm_do_vm_shm_fault(vma, vmf); |
1da177e4 LT |
359 | } |
360 | ||
ca0b07d9 | 361 | static int drm_vm_dma_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
b5e89ed5 | 362 | { |
ca0b07d9 | 363 | return drm_do_vm_dma_fault(vma, vmf); |
1da177e4 LT |
364 | } |
365 | ||
ca0b07d9 | 366 | static int drm_vm_sg_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
b5e89ed5 | 367 | { |
ca0b07d9 | 368 | return drm_do_vm_sg_fault(vma, vmf); |
1da177e4 LT |
369 | } |
370 | ||
1da177e4 | 371 | /** AGP virtual memory operations */ |
f0f37e2f | 372 | static const struct vm_operations_struct drm_vm_ops = { |
ca0b07d9 | 373 | .fault = drm_vm_fault, |
b5e89ed5 DA |
374 | .open = drm_vm_open, |
375 | .close = drm_vm_close, | |
1da177e4 LT |
376 | }; |
377 | ||
378 | /** Shared virtual memory operations */ | |
f0f37e2f | 379 | static const struct vm_operations_struct drm_vm_shm_ops = { |
ca0b07d9 | 380 | .fault = drm_vm_shm_fault, |
b5e89ed5 DA |
381 | .open = drm_vm_open, |
382 | .close = drm_vm_shm_close, | |
1da177e4 LT |
383 | }; |
384 | ||
385 | /** DMA virtual memory operations */ | |
f0f37e2f | 386 | static const struct vm_operations_struct drm_vm_dma_ops = { |
ca0b07d9 | 387 | .fault = drm_vm_dma_fault, |
b5e89ed5 DA |
388 | .open = drm_vm_open, |
389 | .close = drm_vm_close, | |
1da177e4 LT |
390 | }; |
391 | ||
392 | /** Scatter-gather virtual memory operations */ | |
f0f37e2f | 393 | static const struct vm_operations_struct drm_vm_sg_ops = { |
ca0b07d9 | 394 | .fault = drm_vm_sg_fault, |
b5e89ed5 DA |
395 | .open = drm_vm_open, |
396 | .close = drm_vm_close, | |
1da177e4 LT |
397 | }; |
398 | ||
1da177e4 LT |
399 | /** |
400 | * \c open method for shared virtual memory. | |
b5e89ed5 | 401 | * |
1da177e4 | 402 | * \param vma virtual memory area. |
b5e89ed5 | 403 | * |
1da177e4 LT |
404 | * Create a new drm_vma_entry structure as the \p vma private data entry and |
405 | * add it to drm_device::vmalist. | |
406 | */ | |
a2c0a97b | 407 | void drm_vm_open_locked(struct vm_area_struct *vma) |
1da177e4 | 408 | { |
84b1fd10 | 409 | struct drm_file *priv = vma->vm_file->private_data; |
2c14f28b | 410 | struct drm_device *dev = priv->minor->dev; |
8fc2fdf4 | 411 | struct drm_vma_entry *vma_entry; |
1da177e4 LT |
412 | |
413 | DRM_DEBUG("0x%08lx,0x%08lx\n", | |
414 | vma->vm_start, vma->vm_end - vma->vm_start); | |
415 | atomic_inc(&dev->vma_count); | |
416 | ||
9a298b2a | 417 | vma_entry = kmalloc(sizeof(*vma_entry), GFP_KERNEL); |
1da177e4 | 418 | if (vma_entry) { |
b5e89ed5 | 419 | vma_entry->vma = vma; |
b5e89ed5 | 420 | vma_entry->pid = current->pid; |
bd1b331f | 421 | list_add(&vma_entry->head, &dev->vmalist); |
1da177e4 LT |
422 | } |
423 | } | |
424 | ||
d7d8aac7 TH |
425 | static void drm_vm_open(struct vm_area_struct *vma) |
426 | { | |
84b1fd10 | 427 | struct drm_file *priv = vma->vm_file->private_data; |
2c14f28b | 428 | struct drm_device *dev = priv->minor->dev; |
d7d8aac7 TH |
429 | |
430 | mutex_lock(&dev->struct_mutex); | |
431 | drm_vm_open_locked(vma); | |
432 | mutex_unlock(&dev->struct_mutex); | |
433 | } | |
434 | ||
1da177e4 LT |
435 | /** |
436 | * \c close method for all virtual memory types. | |
b5e89ed5 | 437 | * |
1da177e4 | 438 | * \param vma virtual memory area. |
b5e89ed5 | 439 | * |
1da177e4 LT |
440 | * Search the \p vma private data entry in drm_device::vmalist, unlink it, and |
441 | * free it. | |
442 | */ | |
c94f7029 | 443 | static void drm_vm_close(struct vm_area_struct *vma) |
1da177e4 | 444 | { |
84b1fd10 | 445 | struct drm_file *priv = vma->vm_file->private_data; |
2c14f28b | 446 | struct drm_device *dev = priv->minor->dev; |
8fc2fdf4 | 447 | struct drm_vma_entry *pt, *temp; |
1da177e4 LT |
448 | |
449 | DRM_DEBUG("0x%08lx,0x%08lx\n", | |
450 | vma->vm_start, vma->vm_end - vma->vm_start); | |
451 | atomic_dec(&dev->vma_count); | |
452 | ||
30e2fb18 | 453 | mutex_lock(&dev->struct_mutex); |
bd1b331f | 454 | list_for_each_entry_safe(pt, temp, &dev->vmalist, head) { |
1da177e4 | 455 | if (pt->vma == vma) { |
bd1b331f | 456 | list_del(&pt->head); |
9a298b2a | 457 | kfree(pt); |
1da177e4 LT |
458 | break; |
459 | } | |
460 | } | |
30e2fb18 | 461 | mutex_unlock(&dev->struct_mutex); |
1da177e4 LT |
462 | } |
463 | ||
464 | /** | |
465 | * mmap DMA memory. | |
466 | * | |
6c340eac | 467 | * \param file_priv DRM file private. |
1da177e4 LT |
468 | * \param vma virtual memory area. |
469 | * \return zero on success or a negative number on failure. | |
b5e89ed5 | 470 | * |
1da177e4 LT |
471 | * Sets the virtual memory area operations structure to vm_dma_ops, the file |
472 | * pointer, and calls vm_open(). | |
473 | */ | |
c94f7029 | 474 | static int drm_mmap_dma(struct file *filp, struct vm_area_struct *vma) |
1da177e4 | 475 | { |
84b1fd10 DA |
476 | struct drm_file *priv = filp->private_data; |
477 | struct drm_device *dev; | |
cdd55a29 | 478 | struct drm_device_dma *dma; |
b5e89ed5 | 479 | unsigned long length = vma->vm_end - vma->vm_start; |
1da177e4 | 480 | |
2c14f28b | 481 | dev = priv->minor->dev; |
b5e89ed5 | 482 | dma = dev->dma; |
1545085a TH |
483 | DRM_DEBUG("start = 0x%lx, end = 0x%lx, page offset = 0x%lx\n", |
484 | vma->vm_start, vma->vm_end, vma->vm_pgoff); | |
1da177e4 | 485 | |
b5e89ed5 | 486 | /* Length must match exact page count */ |
1da177e4 | 487 | if (!dma || (length >> PAGE_SHIFT) != dma->page_count) { |
1da177e4 LT |
488 | return -EINVAL; |
489 | } | |
1da177e4 | 490 | |
3417f33e GS |
491 | if (!capable(CAP_SYS_ADMIN) && |
492 | (dma->flags & _DRM_DMA_USE_PCI_RO)) { | |
493 | vma->vm_flags &= ~(VM_WRITE | VM_MAYWRITE); | |
494 | #if defined(__i386__) || defined(__x86_64__) | |
495 | pgprot_val(vma->vm_page_prot) &= ~_PAGE_RW; | |
496 | #else | |
497 | /* Ye gads this is ugly. With more thought | |
498 | we could move this up higher and use | |
499 | `protection_map' instead. */ | |
500 | vma->vm_page_prot = | |
501 | __pgprot(pte_val | |
502 | (pte_wrprotect | |
503 | (__pte(pgprot_val(vma->vm_page_prot))))); | |
504 | #endif | |
505 | } | |
506 | ||
b5e89ed5 | 507 | vma->vm_ops = &drm_vm_dma_ops; |
1da177e4 | 508 | |
b5e89ed5 | 509 | vma->vm_flags |= VM_RESERVED; /* Don't swap */ |
2f98735c | 510 | vma->vm_flags |= VM_DONTEXPAND; |
1da177e4 | 511 | |
b5e89ed5 | 512 | vma->vm_file = filp; /* Needed for drm_vm_open() */ |
d7d8aac7 | 513 | drm_vm_open_locked(vma); |
1da177e4 LT |
514 | return 0; |
515 | } | |
516 | ||
41c2e75e | 517 | resource_size_t drm_core_get_map_ofs(struct drm_local_map * map) |
1da177e4 LT |
518 | { |
519 | return map->offset; | |
520 | } | |
b5e89ed5 | 521 | |
1da177e4 LT |
522 | EXPORT_SYMBOL(drm_core_get_map_ofs); |
523 | ||
41c2e75e | 524 | resource_size_t drm_core_get_reg_ofs(struct drm_device *dev) |
1da177e4 LT |
525 | { |
526 | #ifdef __alpha__ | |
527 | return dev->hose->dense_mem_base - dev->hose->mem_space->start; | |
528 | #else | |
529 | return 0; | |
530 | #endif | |
531 | } | |
b5e89ed5 | 532 | |
1da177e4 LT |
533 | EXPORT_SYMBOL(drm_core_get_reg_ofs); |
534 | ||
535 | /** | |
536 | * mmap DMA memory. | |
537 | * | |
6c340eac | 538 | * \param file_priv DRM file private. |
1da177e4 LT |
539 | * \param vma virtual memory area. |
540 | * \return zero on success or a negative number on failure. | |
b5e89ed5 | 541 | * |
1da177e4 LT |
542 | * If the virtual memory area has no offset associated with it then it's a DMA |
543 | * area, so calls mmap_dma(). Otherwise searches the map in drm_device::maplist, | |
544 | * checks that the restricted flag is not set, sets the virtual memory operations | |
545 | * according to the mapping type and remaps the pages. Finally sets the file | |
546 | * pointer and calls vm_open(). | |
547 | */ | |
a2c0a97b | 548 | int drm_mmap_locked(struct file *filp, struct vm_area_struct *vma) |
1da177e4 | 549 | { |
84b1fd10 | 550 | struct drm_file *priv = filp->private_data; |
2c14f28b | 551 | struct drm_device *dev = priv->minor->dev; |
f77d390c | 552 | struct drm_local_map *map = NULL; |
41c2e75e | 553 | resource_size_t offset = 0; |
e0be428e | 554 | struct drm_hash_item *hash; |
1da177e4 | 555 | |
1545085a TH |
556 | DRM_DEBUG("start = 0x%lx, end = 0x%lx, page offset = 0x%lx\n", |
557 | vma->vm_start, vma->vm_end, vma->vm_pgoff); | |
1da177e4 | 558 | |
b5e89ed5 DA |
559 | if (!priv->authenticated) |
560 | return -EACCES; | |
1da177e4 LT |
561 | |
562 | /* We check for "dma". On Apple's UniNorth, it's valid to have | |
563 | * the AGP mapped at physical address 0 | |
564 | * --BenH. | |
565 | */ | |
1545085a | 566 | if (!vma->vm_pgoff |
1da177e4 | 567 | #if __OS_HAS_AGP |
b5e89ed5 DA |
568 | && (!dev->agp |
569 | || dev->agp->agp_info.device->vendor != PCI_VENDOR_ID_APPLE) | |
1da177e4 LT |
570 | #endif |
571 | ) | |
572 | return drm_mmap_dma(filp, vma); | |
573 | ||
1545085a | 574 | if (drm_ht_find_item(&dev->map_hash, vma->vm_pgoff, &hash)) { |
8d153f71 TH |
575 | DRM_ERROR("Could not find map\n"); |
576 | return -EINVAL; | |
1da177e4 LT |
577 | } |
578 | ||
55910517 | 579 | map = drm_hash_entry(hash, struct drm_map_list, hash)->map; |
b5e89ed5 | 580 | if (!map || ((map->flags & _DRM_RESTRICTED) && !capable(CAP_SYS_ADMIN))) |
1da177e4 LT |
581 | return -EPERM; |
582 | ||
b5e89ed5 | 583 | /* Check for valid size. */ |
54ba2f76 | 584 | if (map->size < vma->vm_end - vma->vm_start) |
b5e89ed5 | 585 | return -EINVAL; |
1da177e4 LT |
586 | |
587 | if (!capable(CAP_SYS_ADMIN) && (map->flags & _DRM_READ_ONLY)) { | |
588 | vma->vm_flags &= ~(VM_WRITE | VM_MAYWRITE); | |
589 | #if defined(__i386__) || defined(__x86_64__) | |
590 | pgprot_val(vma->vm_page_prot) &= ~_PAGE_RW; | |
591 | #else | |
b5e89ed5 DA |
592 | /* Ye gads this is ugly. With more thought |
593 | we could move this up higher and use | |
594 | `protection_map' instead. */ | |
595 | vma->vm_page_prot = | |
596 | __pgprot(pte_val | |
597 | (pte_wrprotect | |
598 | (__pte(pgprot_val(vma->vm_page_prot))))); | |
1da177e4 LT |
599 | #endif |
600 | } | |
601 | ||
602 | switch (map->type) { | |
b5e89ed5 DA |
603 | case _DRM_AGP: |
604 | if (drm_core_has_AGP(dev) && dev->agp->cant_use_aperture) { | |
605 | /* | |
606 | * On some platforms we can't talk to bus dma address from the CPU, so for | |
607 | * memory of type DRM_AGP, we'll deal with sorting out the real physical | |
ca0b07d9 | 608 | * pages and mappings in fault() |
b5e89ed5 | 609 | */ |
1da177e4 | 610 | #if defined(__powerpc__) |
b5e89ed5 | 611 | pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE; |
1da177e4 | 612 | #endif |
b5e89ed5 DA |
613 | vma->vm_ops = &drm_vm_ops; |
614 | break; | |
615 | } | |
616 | /* fall through to _DRM_FRAME_BUFFER... */ | |
1da177e4 LT |
617 | case _DRM_FRAME_BUFFER: |
618 | case _DRM_REGISTERS: | |
1da177e4 | 619 | offset = dev->driver->get_reg_ofs(dev); |
5cc7f9ab DA |
620 | vma->vm_flags |= VM_IO; /* not in core dump */ |
621 | vma->vm_page_prot = drm_io_prot(map->type, vma); | |
3d77461e | 622 | if (io_remap_pfn_range(vma, vma->vm_start, |
b5e89ed5 DA |
623 | (map->offset + offset) >> PAGE_SHIFT, |
624 | vma->vm_end - vma->vm_start, | |
625 | vma->vm_page_prot)) | |
b5e89ed5 | 626 | return -EAGAIN; |
1da177e4 | 627 | DRM_DEBUG(" Type = %d; start = 0x%lx, end = 0x%lx," |
41c2e75e | 628 | " offset = 0x%llx\n", |
1da177e4 | 629 | map->type, |
41c2e75e | 630 | vma->vm_start, vma->vm_end, (unsigned long long)(map->offset + offset)); |
1da177e4 LT |
631 | vma->vm_ops = &drm_vm_ops; |
632 | break; | |
2d0f9eaf | 633 | case _DRM_CONSISTENT: |
38315878 | 634 | /* Consistent memory is really like shared memory. But |
ca0b07d9 | 635 | * it's allocated in a different way, so avoid fault */ |
38315878 HD |
636 | if (remap_pfn_range(vma, vma->vm_start, |
637 | page_to_pfn(virt_to_page(map->handle)), | |
638 | vma->vm_end - vma->vm_start, vma->vm_page_prot)) | |
639 | return -EAGAIN; | |
6876b3ba | 640 | vma->vm_page_prot = drm_dma_prot(map->type, vma); |
38315878 HD |
641 | /* fall through to _DRM_SHM */ |
642 | case _DRM_SHM: | |
1da177e4 LT |
643 | vma->vm_ops = &drm_vm_shm_ops; |
644 | vma->vm_private_data = (void *)map; | |
b5e89ed5 DA |
645 | /* Don't let this area swap. Change when |
646 | DRM_KERNEL advisory is supported. */ | |
1da177e4 | 647 | vma->vm_flags |= VM_RESERVED; |
1da177e4 LT |
648 | break; |
649 | case _DRM_SCATTER_GATHER: | |
650 | vma->vm_ops = &drm_vm_sg_ops; | |
651 | vma->vm_private_data = (void *)map; | |
1da177e4 | 652 | vma->vm_flags |= VM_RESERVED; |
5ff64611 | 653 | vma->vm_page_prot = drm_dma_prot(map->type, vma); |
b5e89ed5 | 654 | break; |
1da177e4 LT |
655 | default: |
656 | return -EINVAL; /* This should never happen. */ | |
657 | } | |
b5e89ed5 | 658 | vma->vm_flags |= VM_RESERVED; /* Don't swap */ |
2f98735c | 659 | vma->vm_flags |= VM_DONTEXPAND; |
1da177e4 | 660 | |
b5e89ed5 | 661 | vma->vm_file = filp; /* Needed for drm_vm_open() */ |
d7d8aac7 | 662 | drm_vm_open_locked(vma); |
1da177e4 LT |
663 | return 0; |
664 | } | |
b5e89ed5 | 665 | |
d7d8aac7 TH |
666 | int drm_mmap(struct file *filp, struct vm_area_struct *vma) |
667 | { | |
84b1fd10 | 668 | struct drm_file *priv = filp->private_data; |
2c14f28b | 669 | struct drm_device *dev = priv->minor->dev; |
d7d8aac7 TH |
670 | int ret; |
671 | ||
672 | mutex_lock(&dev->struct_mutex); | |
673 | ret = drm_mmap_locked(filp, vma); | |
674 | mutex_unlock(&dev->struct_mutex); | |
675 | ||
676 | return ret; | |
677 | } | |
1da177e4 | 678 | EXPORT_SYMBOL(drm_mmap); |