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 | |
0bead7cd | 46 | static pgprot_t drm_io_prot(uint32_t map_type, struct vm_area_struct *vma) |
5cc7f9ab DA |
47 | { |
48 | pgprot_t tmp = vm_get_page_prot(vma->vm_flags); | |
49 | ||
50 | #if defined(__i386__) || defined(__x86_64__) | |
51 | if (boot_cpu_data.x86 > 3 && map_type != _DRM_AGP) { | |
52 | pgprot_val(tmp) |= _PAGE_PCD; | |
53 | pgprot_val(tmp) &= ~_PAGE_PWT; | |
54 | } | |
55 | #elif defined(__powerpc__) | |
56 | pgprot_val(tmp) |= _PAGE_NO_CACHE; | |
57 | if (map_type == _DRM_REGISTERS) | |
58 | pgprot_val(tmp) |= _PAGE_GUARDED; | |
6876b3ba | 59 | #elif defined(__ia64__) |
5cc7f9ab DA |
60 | if (efi_range_is_wc(vma->vm_start, vma->vm_end - |
61 | vma->vm_start)) | |
62 | tmp = pgprot_writecombine(tmp); | |
63 | else | |
64 | tmp = pgprot_noncached(tmp); | |
04cf55e1 | 65 | #elif defined(__sparc__) || defined(__arm__) || defined(__mips__) |
6876b3ba BH |
66 | tmp = pgprot_noncached(tmp); |
67 | #endif | |
68 | return tmp; | |
69 | } | |
70 | ||
71 | static pgprot_t drm_dma_prot(uint32_t map_type, struct vm_area_struct *vma) | |
72 | { | |
73 | pgprot_t tmp = vm_get_page_prot(vma->vm_flags); | |
74 | ||
75 | #if defined(__powerpc__) && defined(CONFIG_NOT_COHERENT_CACHE) | |
76 | tmp |= _PAGE_NO_CACHE; | |
5cc7f9ab DA |
77 | #endif |
78 | return tmp; | |
79 | } | |
80 | ||
1da177e4 | 81 | /** |
ca0b07d9 | 82 | * \c fault method for AGP virtual memory. |
1da177e4 LT |
83 | * |
84 | * \param vma virtual memory area. | |
85 | * \param address access address. | |
86 | * \return pointer to the page structure. | |
b5e89ed5 | 87 | * |
1da177e4 LT |
88 | * Find the right map and if it's AGP memory find the real physical page to |
89 | * map, get the page, increment the use count and return it. | |
90 | */ | |
91 | #if __OS_HAS_AGP | |
ca0b07d9 | 92 | static int drm_do_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
1da177e4 | 93 | { |
84b1fd10 | 94 | struct drm_file *priv = vma->vm_file->private_data; |
2c14f28b | 95 | struct drm_device *dev = priv->minor->dev; |
f77d390c | 96 | struct drm_local_map *map = NULL; |
55910517 | 97 | struct drm_map_list *r_list; |
e0be428e | 98 | struct drm_hash_item *hash; |
1da177e4 LT |
99 | |
100 | /* | |
b5e89ed5 DA |
101 | * Find the right map |
102 | */ | |
1da177e4 | 103 | if (!drm_core_has_AGP(dev)) |
ca0b07d9 | 104 | goto vm_fault_error; |
1da177e4 | 105 | |
b5e89ed5 | 106 | if (!dev->agp || !dev->agp->cant_use_aperture) |
ca0b07d9 | 107 | goto vm_fault_error; |
1da177e4 | 108 | |
1545085a | 109 | if (drm_ht_find_item(&dev->map_hash, vma->vm_pgoff, &hash)) |
ca0b07d9 | 110 | goto vm_fault_error; |
8d153f71 | 111 | |
55910517 | 112 | r_list = drm_hash_entry(hash, struct drm_map_list, hash); |
8d153f71 | 113 | map = r_list->map; |
1da177e4 LT |
114 | |
115 | if (map && map->type == _DRM_AGP) { | |
ca0b07d9 NP |
116 | /* |
117 | * Using vm_pgoff as a selector forces us to use this unusual | |
118 | * addressing scheme. | |
119 | */ | |
41c2e75e BH |
120 | resource_size_t offset = (unsigned long)vmf->virtual_address - |
121 | vma->vm_start; | |
122 | resource_size_t baddr = map->offset + offset; | |
1da177e4 LT |
123 | struct drm_agp_mem *agpmem; |
124 | struct page *page; | |
125 | ||
126 | #ifdef __alpha__ | |
127 | /* | |
b5e89ed5 DA |
128 | * Adjust to a bus-relative address |
129 | */ | |
1da177e4 LT |
130 | baddr -= dev->hose->mem_space->start; |
131 | #endif | |
132 | ||
133 | /* | |
b5e89ed5 DA |
134 | * It's AGP memory - find the real physical page to map |
135 | */ | |
bd1b331f | 136 | list_for_each_entry(agpmem, &dev->agp->memory, head) { |
1da177e4 | 137 | if (agpmem->bound <= baddr && |
b5e89ed5 | 138 | agpmem->bound + agpmem->pages * PAGE_SIZE > baddr) |
1da177e4 LT |
139 | break; |
140 | } | |
141 | ||
161c4810 | 142 | if (&agpmem->head == &dev->agp->memory) |
ca0b07d9 | 143 | goto vm_fault_error; |
1da177e4 LT |
144 | |
145 | /* | |
b5e89ed5 DA |
146 | * Get the page, inc the use count, and return it |
147 | */ | |
1da177e4 | 148 | offset = (baddr - agpmem->bound) >> PAGE_SHIFT; |
07613ba2 | 149 | page = agpmem->memory->pages[offset]; |
1da177e4 | 150 | get_page(page); |
ca0b07d9 | 151 | vmf->page = page; |
1da177e4 | 152 | |
b5e89ed5 | 153 | DRM_DEBUG |
41c2e75e BH |
154 | ("baddr = 0x%llx page = 0x%p, offset = 0x%llx, count=%d\n", |
155 | (unsigned long long)baddr, | |
07613ba2 | 156 | agpmem->memory->pages[offset], |
41c2e75e | 157 | (unsigned long long)offset, |
b5e89ed5 | 158 | page_count(page)); |
ca0b07d9 | 159 | return 0; |
b5e89ed5 | 160 | } |
ca0b07d9 NP |
161 | vm_fault_error: |
162 | return VM_FAULT_SIGBUS; /* Disallow mremap */ | |
1da177e4 | 163 | } |
b5e89ed5 | 164 | #else /* __OS_HAS_AGP */ |
ca0b07d9 | 165 | static int drm_do_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
1da177e4 | 166 | { |
ca0b07d9 | 167 | return VM_FAULT_SIGBUS; |
1da177e4 | 168 | } |
b5e89ed5 | 169 | #endif /* __OS_HAS_AGP */ |
1da177e4 LT |
170 | |
171 | /** | |
172 | * \c nopage method for shared virtual memory. | |
173 | * | |
174 | * \param vma virtual memory area. | |
175 | * \param address access address. | |
176 | * \return pointer to the page structure. | |
b5e89ed5 | 177 | * |
59c51591 | 178 | * Get the mapping, find the real physical page to map, get the page, and |
1da177e4 LT |
179 | * return it. |
180 | */ | |
ca0b07d9 | 181 | static int drm_do_vm_shm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
1da177e4 | 182 | { |
f77d390c | 183 | struct drm_local_map *map = vma->vm_private_data; |
b5e89ed5 DA |
184 | unsigned long offset; |
185 | unsigned long i; | |
186 | struct page *page; | |
1da177e4 | 187 | |
b5e89ed5 | 188 | if (!map) |
ca0b07d9 | 189 | return VM_FAULT_SIGBUS; /* Nothing allocated */ |
1da177e4 | 190 | |
ca0b07d9 | 191 | offset = (unsigned long)vmf->virtual_address - vma->vm_start; |
1da177e4 | 192 | i = (unsigned long)map->handle + offset; |
38315878 | 193 | page = vmalloc_to_page((void *)i); |
1da177e4 | 194 | if (!page) |
ca0b07d9 | 195 | return VM_FAULT_SIGBUS; |
1da177e4 | 196 | get_page(page); |
ca0b07d9 | 197 | vmf->page = page; |
1da177e4 | 198 | |
ca0b07d9 NP |
199 | DRM_DEBUG("shm_fault 0x%lx\n", offset); |
200 | return 0; | |
1da177e4 LT |
201 | } |
202 | ||
1da177e4 LT |
203 | /** |
204 | * \c close method for shared virtual memory. | |
b5e89ed5 | 205 | * |
1da177e4 | 206 | * \param vma virtual memory area. |
b5e89ed5 | 207 | * |
1da177e4 LT |
208 | * Deletes map information if we are the last |
209 | * person to close a mapping and it's not in the global maplist. | |
210 | */ | |
c94f7029 | 211 | static void drm_vm_shm_close(struct vm_area_struct *vma) |
1da177e4 | 212 | { |
84b1fd10 | 213 | struct drm_file *priv = vma->vm_file->private_data; |
2c14f28b | 214 | struct drm_device *dev = priv->minor->dev; |
8fc2fdf4 | 215 | struct drm_vma_entry *pt, *temp; |
f77d390c | 216 | struct drm_local_map *map; |
55910517 | 217 | struct drm_map_list *r_list; |
1da177e4 LT |
218 | int found_maps = 0; |
219 | ||
220 | DRM_DEBUG("0x%08lx,0x%08lx\n", | |
221 | vma->vm_start, vma->vm_end - vma->vm_start); | |
222 | atomic_dec(&dev->vma_count); | |
223 | ||
224 | map = vma->vm_private_data; | |
225 | ||
30e2fb18 | 226 | mutex_lock(&dev->struct_mutex); |
bd1b331f | 227 | list_for_each_entry_safe(pt, temp, &dev->vmalist, head) { |
b5e89ed5 DA |
228 | if (pt->vma->vm_private_data == map) |
229 | found_maps++; | |
1da177e4 | 230 | if (pt->vma == vma) { |
bd1b331f | 231 | list_del(&pt->head); |
9a298b2a | 232 | kfree(pt); |
1da177e4 LT |
233 | } |
234 | } | |
bd1b331f | 235 | |
1da177e4 | 236 | /* We were the only map that was found */ |
b5e89ed5 | 237 | if (found_maps == 1 && map->flags & _DRM_REMOVABLE) { |
1da177e4 LT |
238 | /* Check to see if we are in the maplist, if we are not, then |
239 | * we delete this mappings information. | |
240 | */ | |
241 | found_maps = 0; | |
bd1b331f | 242 | list_for_each_entry(r_list, &dev->maplist, head) { |
b5e89ed5 DA |
243 | if (r_list->map == map) |
244 | found_maps++; | |
1da177e4 LT |
245 | } |
246 | ||
b5e89ed5 | 247 | if (!found_maps) { |
9c8da5eb DA |
248 | drm_dma_handle_t dmah; |
249 | ||
1da177e4 LT |
250 | switch (map->type) { |
251 | case _DRM_REGISTERS: | |
252 | case _DRM_FRAME_BUFFER: | |
253 | if (drm_core_has_MTRR(dev) && map->mtrr >= 0) { | |
254 | int retcode; | |
255 | retcode = mtrr_del(map->mtrr, | |
256 | map->offset, | |
257 | map->size); | |
258 | DRM_DEBUG("mtrr_del = %d\n", retcode); | |
259 | } | |
004a7727 | 260 | iounmap(map->handle); |
1da177e4 LT |
261 | break; |
262 | case _DRM_SHM: | |
263 | vfree(map->handle); | |
264 | break; | |
265 | case _DRM_AGP: | |
266 | case _DRM_SCATTER_GATHER: | |
267 | break; | |
2d0f9eaf | 268 | case _DRM_CONSISTENT: |
9c8da5eb DA |
269 | dmah.vaddr = map->handle; |
270 | dmah.busaddr = map->offset; | |
271 | dmah.size = map->size; | |
272 | __drm_pci_free(dev, &dmah); | |
2d0f9eaf | 273 | break; |
a2c0a97b JB |
274 | case _DRM_GEM: |
275 | DRM_ERROR("tried to rmmap GEM object\n"); | |
276 | break; | |
1da177e4 | 277 | } |
9a298b2a | 278 | kfree(map); |
1da177e4 LT |
279 | } |
280 | } | |
30e2fb18 | 281 | mutex_unlock(&dev->struct_mutex); |
1da177e4 LT |
282 | } |
283 | ||
284 | /** | |
ca0b07d9 | 285 | * \c fault method for DMA virtual memory. |
1da177e4 LT |
286 | * |
287 | * \param vma virtual memory area. | |
288 | * \param address access address. | |
289 | * \return pointer to the page structure. | |
b5e89ed5 | 290 | * |
1da177e4 LT |
291 | * Determine the page number from the page offset and get it from drm_device_dma::pagelist. |
292 | */ | |
ca0b07d9 | 293 | static int drm_do_vm_dma_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
1da177e4 | 294 | { |
84b1fd10 | 295 | struct drm_file *priv = vma->vm_file->private_data; |
2c14f28b | 296 | struct drm_device *dev = priv->minor->dev; |
cdd55a29 | 297 | struct drm_device_dma *dma = dev->dma; |
b5e89ed5 DA |
298 | unsigned long offset; |
299 | unsigned long page_nr; | |
300 | struct page *page; | |
301 | ||
302 | if (!dma) | |
ca0b07d9 | 303 | return VM_FAULT_SIGBUS; /* Error */ |
b5e89ed5 | 304 | if (!dma->pagelist) |
ca0b07d9 | 305 | return VM_FAULT_SIGBUS; /* Nothing allocated */ |
b5e89ed5 | 306 | |
ca0b07d9 NP |
307 | offset = (unsigned long)vmf->virtual_address - vma->vm_start; /* vm_[pg]off[set] should be 0 */ |
308 | page_nr = offset >> PAGE_SHIFT; /* page_nr could just be vmf->pgoff */ | |
b5e89ed5 | 309 | page = virt_to_page((dma->pagelist[page_nr] + (offset & (~PAGE_MASK)))); |
1da177e4 LT |
310 | |
311 | get_page(page); | |
ca0b07d9 | 312 | vmf->page = page; |
1da177e4 | 313 | |
ca0b07d9 NP |
314 | DRM_DEBUG("dma_fault 0x%lx (page %lu)\n", offset, page_nr); |
315 | return 0; | |
1da177e4 LT |
316 | } |
317 | ||
318 | /** | |
ca0b07d9 | 319 | * \c fault method for scatter-gather virtual memory. |
1da177e4 LT |
320 | * |
321 | * \param vma virtual memory area. | |
322 | * \param address access address. | |
323 | * \return pointer to the page structure. | |
b5e89ed5 | 324 | * |
1da177e4 LT |
325 | * Determine the map offset from the page offset and get it from drm_sg_mem::pagelist. |
326 | */ | |
ca0b07d9 | 327 | static int drm_do_vm_sg_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
1da177e4 | 328 | { |
f77d390c | 329 | struct drm_local_map *map = vma->vm_private_data; |
84b1fd10 | 330 | struct drm_file *priv = vma->vm_file->private_data; |
2c14f28b | 331 | struct drm_device *dev = priv->minor->dev; |
55910517 | 332 | struct drm_sg_mem *entry = dev->sg; |
1da177e4 LT |
333 | unsigned long offset; |
334 | unsigned long map_offset; | |
335 | unsigned long page_offset; | |
336 | struct page *page; | |
337 | ||
b5e89ed5 | 338 | if (!entry) |
ca0b07d9 | 339 | return VM_FAULT_SIGBUS; /* Error */ |
b5e89ed5 | 340 | if (!entry->pagelist) |
ca0b07d9 | 341 | return VM_FAULT_SIGBUS; /* Nothing allocated */ |
1da177e4 | 342 | |
ca0b07d9 | 343 | offset = (unsigned long)vmf->virtual_address - vma->vm_start; |
d1f2b55a | 344 | map_offset = map->offset - (unsigned long)dev->sg->virtual; |
1da177e4 LT |
345 | page_offset = (offset >> PAGE_SHIFT) + (map_offset >> PAGE_SHIFT); |
346 | page = entry->pagelist[page_offset]; | |
347 | get_page(page); | |
ca0b07d9 | 348 | vmf->page = page; |
1da177e4 | 349 | |
ca0b07d9 | 350 | return 0; |
1da177e4 LT |
351 | } |
352 | ||
ca0b07d9 | 353 | static int drm_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
b5e89ed5 | 354 | { |
ca0b07d9 | 355 | return drm_do_vm_fault(vma, vmf); |
1da177e4 LT |
356 | } |
357 | ||
ca0b07d9 | 358 | static int drm_vm_shm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
b5e89ed5 | 359 | { |
ca0b07d9 | 360 | return drm_do_vm_shm_fault(vma, vmf); |
1da177e4 LT |
361 | } |
362 | ||
ca0b07d9 | 363 | static int drm_vm_dma_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
b5e89ed5 | 364 | { |
ca0b07d9 | 365 | return drm_do_vm_dma_fault(vma, vmf); |
1da177e4 LT |
366 | } |
367 | ||
ca0b07d9 | 368 | static int drm_vm_sg_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
b5e89ed5 | 369 | { |
ca0b07d9 | 370 | return drm_do_vm_sg_fault(vma, vmf); |
1da177e4 LT |
371 | } |
372 | ||
1da177e4 | 373 | /** AGP virtual memory operations */ |
f0f37e2f | 374 | static const struct vm_operations_struct drm_vm_ops = { |
ca0b07d9 | 375 | .fault = drm_vm_fault, |
b5e89ed5 DA |
376 | .open = drm_vm_open, |
377 | .close = drm_vm_close, | |
1da177e4 LT |
378 | }; |
379 | ||
380 | /** Shared virtual memory operations */ | |
f0f37e2f | 381 | static const struct vm_operations_struct drm_vm_shm_ops = { |
ca0b07d9 | 382 | .fault = drm_vm_shm_fault, |
b5e89ed5 DA |
383 | .open = drm_vm_open, |
384 | .close = drm_vm_shm_close, | |
1da177e4 LT |
385 | }; |
386 | ||
387 | /** DMA virtual memory operations */ | |
f0f37e2f | 388 | static const struct vm_operations_struct drm_vm_dma_ops = { |
ca0b07d9 | 389 | .fault = drm_vm_dma_fault, |
b5e89ed5 DA |
390 | .open = drm_vm_open, |
391 | .close = drm_vm_close, | |
1da177e4 LT |
392 | }; |
393 | ||
394 | /** Scatter-gather virtual memory operations */ | |
f0f37e2f | 395 | static const struct vm_operations_struct drm_vm_sg_ops = { |
ca0b07d9 | 396 | .fault = drm_vm_sg_fault, |
b5e89ed5 DA |
397 | .open = drm_vm_open, |
398 | .close = drm_vm_close, | |
1da177e4 LT |
399 | }; |
400 | ||
1da177e4 LT |
401 | /** |
402 | * \c open method for shared virtual memory. | |
b5e89ed5 | 403 | * |
1da177e4 | 404 | * \param vma virtual memory area. |
b5e89ed5 | 405 | * |
1da177e4 LT |
406 | * Create a new drm_vma_entry structure as the \p vma private data entry and |
407 | * add it to drm_device::vmalist. | |
408 | */ | |
b06d66be RC |
409 | void drm_vm_open_locked(struct drm_device *dev, |
410 | struct vm_area_struct *vma) | |
1da177e4 | 411 | { |
8fc2fdf4 | 412 | struct drm_vma_entry *vma_entry; |
1da177e4 LT |
413 | |
414 | DRM_DEBUG("0x%08lx,0x%08lx\n", | |
415 | vma->vm_start, vma->vm_end - vma->vm_start); | |
416 | atomic_inc(&dev->vma_count); | |
417 | ||
9a298b2a | 418 | vma_entry = kmalloc(sizeof(*vma_entry), GFP_KERNEL); |
1da177e4 | 419 | if (vma_entry) { |
b5e89ed5 | 420 | vma_entry->vma = vma; |
b5e89ed5 | 421 | vma_entry->pid = current->pid; |
bd1b331f | 422 | list_add(&vma_entry->head, &dev->vmalist); |
1da177e4 LT |
423 | } |
424 | } | |
d5028995 | 425 | EXPORT_SYMBOL_GPL(drm_vm_open_locked); |
1da177e4 | 426 | |
d7d8aac7 TH |
427 | static void drm_vm_open(struct vm_area_struct *vma) |
428 | { | |
84b1fd10 | 429 | struct drm_file *priv = vma->vm_file->private_data; |
2c14f28b | 430 | struct drm_device *dev = priv->minor->dev; |
d7d8aac7 TH |
431 | |
432 | mutex_lock(&dev->struct_mutex); | |
b06d66be | 433 | drm_vm_open_locked(dev, vma); |
d7d8aac7 TH |
434 | mutex_unlock(&dev->struct_mutex); |
435 | } | |
436 | ||
b06d66be RC |
437 | void drm_vm_close_locked(struct drm_device *dev, |
438 | struct vm_area_struct *vma) | |
1da177e4 | 439 | { |
8fc2fdf4 | 440 | struct drm_vma_entry *pt, *temp; |
1da177e4 LT |
441 | |
442 | DRM_DEBUG("0x%08lx,0x%08lx\n", | |
443 | vma->vm_start, vma->vm_end - vma->vm_start); | |
444 | atomic_dec(&dev->vma_count); | |
445 | ||
bd1b331f | 446 | list_for_each_entry_safe(pt, temp, &dev->vmalist, head) { |
1da177e4 | 447 | if (pt->vma == vma) { |
bd1b331f | 448 | list_del(&pt->head); |
9a298b2a | 449 | kfree(pt); |
1da177e4 LT |
450 | break; |
451 | } | |
452 | } | |
31dfbc93 CW |
453 | } |
454 | ||
455 | /** | |
456 | * \c close method for all virtual memory types. | |
457 | * | |
458 | * \param vma virtual memory area. | |
459 | * | |
460 | * Search the \p vma private data entry in drm_device::vmalist, unlink it, and | |
461 | * free it. | |
462 | */ | |
463 | static void drm_vm_close(struct vm_area_struct *vma) | |
464 | { | |
465 | struct drm_file *priv = vma->vm_file->private_data; | |
466 | struct drm_device *dev = priv->minor->dev; | |
467 | ||
468 | mutex_lock(&dev->struct_mutex); | |
b06d66be | 469 | drm_vm_close_locked(dev, vma); |
30e2fb18 | 470 | mutex_unlock(&dev->struct_mutex); |
1da177e4 LT |
471 | } |
472 | ||
473 | /** | |
474 | * mmap DMA memory. | |
475 | * | |
6c340eac | 476 | * \param file_priv DRM file private. |
1da177e4 LT |
477 | * \param vma virtual memory area. |
478 | * \return zero on success or a negative number on failure. | |
b5e89ed5 | 479 | * |
1da177e4 LT |
480 | * Sets the virtual memory area operations structure to vm_dma_ops, the file |
481 | * pointer, and calls vm_open(). | |
482 | */ | |
c94f7029 | 483 | static int drm_mmap_dma(struct file *filp, struct vm_area_struct *vma) |
1da177e4 | 484 | { |
84b1fd10 DA |
485 | struct drm_file *priv = filp->private_data; |
486 | struct drm_device *dev; | |
cdd55a29 | 487 | struct drm_device_dma *dma; |
b5e89ed5 | 488 | unsigned long length = vma->vm_end - vma->vm_start; |
1da177e4 | 489 | |
2c14f28b | 490 | dev = priv->minor->dev; |
b5e89ed5 | 491 | dma = dev->dma; |
1545085a TH |
492 | DRM_DEBUG("start = 0x%lx, end = 0x%lx, page offset = 0x%lx\n", |
493 | vma->vm_start, vma->vm_end, vma->vm_pgoff); | |
1da177e4 | 494 | |
b5e89ed5 | 495 | /* Length must match exact page count */ |
1da177e4 | 496 | if (!dma || (length >> PAGE_SHIFT) != dma->page_count) { |
1da177e4 LT |
497 | return -EINVAL; |
498 | } | |
1da177e4 | 499 | |
3417f33e GS |
500 | if (!capable(CAP_SYS_ADMIN) && |
501 | (dma->flags & _DRM_DMA_USE_PCI_RO)) { | |
502 | vma->vm_flags &= ~(VM_WRITE | VM_MAYWRITE); | |
503 | #if defined(__i386__) || defined(__x86_64__) | |
504 | pgprot_val(vma->vm_page_prot) &= ~_PAGE_RW; | |
505 | #else | |
506 | /* Ye gads this is ugly. With more thought | |
507 | we could move this up higher and use | |
508 | `protection_map' instead. */ | |
509 | vma->vm_page_prot = | |
510 | __pgprot(pte_val | |
511 | (pte_wrprotect | |
512 | (__pte(pgprot_val(vma->vm_page_prot))))); | |
513 | #endif | |
514 | } | |
515 | ||
b5e89ed5 | 516 | vma->vm_ops = &drm_vm_dma_ops; |
1da177e4 | 517 | |
314e51b9 | 518 | vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; |
1da177e4 | 519 | |
b06d66be | 520 | drm_vm_open_locked(dev, vma); |
1da177e4 LT |
521 | return 0; |
522 | } | |
523 | ||
cbc60ca0 | 524 | static resource_size_t drm_core_get_reg_ofs(struct drm_device *dev) |
1da177e4 LT |
525 | { |
526 | #ifdef __alpha__ | |
82ba3fef | 527 | return dev->hose->dense_mem_base; |
1da177e4 LT |
528 | #else |
529 | return 0; | |
530 | #endif | |
531 | } | |
b5e89ed5 | 532 | |
1da177e4 LT |
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; |
f77d390c | 550 | struct drm_local_map *map = NULL; |
41c2e75e | 551 | resource_size_t 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) { | |
4b7fb9b5 | 601 | #if !defined(__arm__) |
b5e89ed5 DA |
602 | case _DRM_AGP: |
603 | if (drm_core_has_AGP(dev) && dev->agp->cant_use_aperture) { | |
604 | /* | |
605 | * On some platforms we can't talk to bus dma address from the CPU, so for | |
606 | * memory of type DRM_AGP, we'll deal with sorting out the real physical | |
ca0b07d9 | 607 | * pages and mappings in fault() |
b5e89ed5 | 608 | */ |
1da177e4 | 609 | #if defined(__powerpc__) |
b5e89ed5 | 610 | pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE; |
1da177e4 | 611 | #endif |
b5e89ed5 DA |
612 | vma->vm_ops = &drm_vm_ops; |
613 | break; | |
614 | } | |
615 | /* fall through to _DRM_FRAME_BUFFER... */ | |
4b7fb9b5 | 616 | #endif |
1da177e4 LT |
617 | case _DRM_FRAME_BUFFER: |
618 | case _DRM_REGISTERS: | |
cbc60ca0 | 619 | offset = drm_core_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)); |
4b7fb9b5 | 631 | |
1da177e4 LT |
632 | vma->vm_ops = &drm_vm_ops; |
633 | break; | |
2d0f9eaf | 634 | case _DRM_CONSISTENT: |
38315878 | 635 | /* Consistent memory is really like shared memory. But |
ca0b07d9 | 636 | * it's allocated in a different way, so avoid fault */ |
38315878 HD |
637 | if (remap_pfn_range(vma, vma->vm_start, |
638 | page_to_pfn(virt_to_page(map->handle)), | |
639 | vma->vm_end - vma->vm_start, vma->vm_page_prot)) | |
640 | return -EAGAIN; | |
6876b3ba | 641 | vma->vm_page_prot = drm_dma_prot(map->type, vma); |
38315878 HD |
642 | /* fall through to _DRM_SHM */ |
643 | case _DRM_SHM: | |
1da177e4 LT |
644 | vma->vm_ops = &drm_vm_shm_ops; |
645 | vma->vm_private_data = (void *)map; | |
1da177e4 LT |
646 | break; |
647 | case _DRM_SCATTER_GATHER: | |
648 | vma->vm_ops = &drm_vm_sg_ops; | |
649 | vma->vm_private_data = (void *)map; | |
5ff64611 | 650 | vma->vm_page_prot = drm_dma_prot(map->type, vma); |
b5e89ed5 | 651 | break; |
1da177e4 LT |
652 | default: |
653 | return -EINVAL; /* This should never happen. */ | |
654 | } | |
314e51b9 | 655 | vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; |
1da177e4 | 656 | |
b06d66be | 657 | drm_vm_open_locked(dev, vma); |
1da177e4 LT |
658 | return 0; |
659 | } | |
b5e89ed5 | 660 | |
d7d8aac7 TH |
661 | int drm_mmap(struct file *filp, struct vm_area_struct *vma) |
662 | { | |
84b1fd10 | 663 | struct drm_file *priv = filp->private_data; |
2c14f28b | 664 | struct drm_device *dev = priv->minor->dev; |
d7d8aac7 TH |
665 | int ret; |
666 | ||
2c07a21d DA |
667 | if (drm_device_is_unplugged(dev)) |
668 | return -ENODEV; | |
669 | ||
d7d8aac7 TH |
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); |