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> |
03decbe5 | 38 | #include <linux/seq_file.h> |
1da177e4 LT |
39 | #if defined(__ia64__) |
40 | #include <linux/efi.h> | |
5a0e3ad6 | 41 | #include <linux/slab.h> |
1da177e4 | 42 | #endif |
2791ee85 | 43 | #include <asm/pgtable.h> |
cc5ea594 | 44 | #include "drm_legacy.h" |
1da177e4 | 45 | |
03decbe5 DH |
46 | struct drm_vma_entry { |
47 | struct list_head head; | |
48 | struct vm_area_struct *vma; | |
49 | pid_t pid; | |
50 | }; | |
51 | ||
c94f7029 DA |
52 | static void drm_vm_open(struct vm_area_struct *vma); |
53 | static void drm_vm_close(struct vm_area_struct *vma); | |
1da177e4 | 54 | |
ff47eaf2 AL |
55 | static pgprot_t drm_io_prot(struct drm_local_map *map, |
56 | struct vm_area_struct *vma) | |
5cc7f9ab DA |
57 | { |
58 | pgprot_t tmp = vm_get_page_prot(vma->vm_flags); | |
59 | ||
6bd3110c | 60 | #if defined(__i386__) || defined(__x86_64__) || defined(__powerpc__) |
f435046d AL |
61 | if (map->type == _DRM_REGISTERS && !(map->flags & _DRM_WRITE_COMBINING)) |
62 | tmp = pgprot_noncached(tmp); | |
63 | else | |
64 | tmp = pgprot_writecombine(tmp); | |
6876b3ba | 65 | #elif defined(__ia64__) |
5cc7f9ab DA |
66 | if (efi_range_is_wc(vma->vm_start, vma->vm_end - |
67 | vma->vm_start)) | |
68 | tmp = pgprot_writecombine(tmp); | |
69 | else | |
70 | tmp = pgprot_noncached(tmp); | |
04cf55e1 | 71 | #elif defined(__sparc__) || defined(__arm__) || defined(__mips__) |
6876b3ba BH |
72 | tmp = pgprot_noncached(tmp); |
73 | #endif | |
74 | return tmp; | |
75 | } | |
76 | ||
77 | static pgprot_t drm_dma_prot(uint32_t map_type, struct vm_area_struct *vma) | |
78 | { | |
79 | pgprot_t tmp = vm_get_page_prot(vma->vm_flags); | |
80 | ||
81 | #if defined(__powerpc__) && defined(CONFIG_NOT_COHERENT_CACHE) | |
82 | tmp |= _PAGE_NO_CACHE; | |
5cc7f9ab DA |
83 | #endif |
84 | return tmp; | |
85 | } | |
86 | ||
1da177e4 | 87 | /** |
ca0b07d9 | 88 | * \c fault method for AGP virtual memory. |
1da177e4 LT |
89 | * |
90 | * \param vma virtual memory area. | |
91 | * \param address access address. | |
92 | * \return pointer to the page structure. | |
b5e89ed5 | 93 | * |
1da177e4 LT |
94 | * Find the right map and if it's AGP memory find the real physical page to |
95 | * map, get the page, increment the use count and return it. | |
96 | */ | |
97 | #if __OS_HAS_AGP | |
ca0b07d9 | 98 | static int drm_do_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
1da177e4 | 99 | { |
84b1fd10 | 100 | struct drm_file *priv = vma->vm_file->private_data; |
2c14f28b | 101 | struct drm_device *dev = priv->minor->dev; |
f77d390c | 102 | struct drm_local_map *map = NULL; |
55910517 | 103 | struct drm_map_list *r_list; |
e0be428e | 104 | struct drm_hash_item *hash; |
1da177e4 LT |
105 | |
106 | /* | |
b5e89ed5 DA |
107 | * Find the right map |
108 | */ | |
d9906753 | 109 | if (!dev->agp) |
ca0b07d9 | 110 | goto vm_fault_error; |
1da177e4 | 111 | |
b5e89ed5 | 112 | if (!dev->agp || !dev->agp->cant_use_aperture) |
ca0b07d9 | 113 | goto vm_fault_error; |
1da177e4 | 114 | |
1545085a | 115 | if (drm_ht_find_item(&dev->map_hash, vma->vm_pgoff, &hash)) |
ca0b07d9 | 116 | goto vm_fault_error; |
8d153f71 | 117 | |
55910517 | 118 | r_list = drm_hash_entry(hash, struct drm_map_list, hash); |
8d153f71 | 119 | map = r_list->map; |
1da177e4 LT |
120 | |
121 | if (map && map->type == _DRM_AGP) { | |
ca0b07d9 NP |
122 | /* |
123 | * Using vm_pgoff as a selector forces us to use this unusual | |
124 | * addressing scheme. | |
125 | */ | |
41c2e75e BH |
126 | resource_size_t offset = (unsigned long)vmf->virtual_address - |
127 | vma->vm_start; | |
128 | resource_size_t baddr = map->offset + offset; | |
1da177e4 LT |
129 | struct drm_agp_mem *agpmem; |
130 | struct page *page; | |
131 | ||
132 | #ifdef __alpha__ | |
133 | /* | |
b5e89ed5 DA |
134 | * Adjust to a bus-relative address |
135 | */ | |
1da177e4 LT |
136 | baddr -= dev->hose->mem_space->start; |
137 | #endif | |
138 | ||
139 | /* | |
b5e89ed5 DA |
140 | * It's AGP memory - find the real physical page to map |
141 | */ | |
bd1b331f | 142 | list_for_each_entry(agpmem, &dev->agp->memory, head) { |
1da177e4 | 143 | if (agpmem->bound <= baddr && |
b5e89ed5 | 144 | agpmem->bound + agpmem->pages * PAGE_SIZE > baddr) |
1da177e4 LT |
145 | break; |
146 | } | |
147 | ||
161c4810 | 148 | if (&agpmem->head == &dev->agp->memory) |
ca0b07d9 | 149 | goto vm_fault_error; |
1da177e4 LT |
150 | |
151 | /* | |
b5e89ed5 DA |
152 | * Get the page, inc the use count, and return it |
153 | */ | |
1da177e4 | 154 | offset = (baddr - agpmem->bound) >> PAGE_SHIFT; |
07613ba2 | 155 | page = agpmem->memory->pages[offset]; |
1da177e4 | 156 | get_page(page); |
ca0b07d9 | 157 | vmf->page = page; |
1da177e4 | 158 | |
b5e89ed5 | 159 | DRM_DEBUG |
41c2e75e BH |
160 | ("baddr = 0x%llx page = 0x%p, offset = 0x%llx, count=%d\n", |
161 | (unsigned long long)baddr, | |
07613ba2 | 162 | agpmem->memory->pages[offset], |
41c2e75e | 163 | (unsigned long long)offset, |
b5e89ed5 | 164 | page_count(page)); |
ca0b07d9 | 165 | return 0; |
b5e89ed5 | 166 | } |
ca0b07d9 NP |
167 | vm_fault_error: |
168 | return VM_FAULT_SIGBUS; /* Disallow mremap */ | |
1da177e4 | 169 | } |
b5e89ed5 | 170 | #else /* __OS_HAS_AGP */ |
ca0b07d9 | 171 | static int drm_do_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
1da177e4 | 172 | { |
ca0b07d9 | 173 | return VM_FAULT_SIGBUS; |
1da177e4 | 174 | } |
b5e89ed5 | 175 | #endif /* __OS_HAS_AGP */ |
1da177e4 LT |
176 | |
177 | /** | |
178 | * \c nopage method for shared virtual memory. | |
179 | * | |
180 | * \param vma virtual memory area. | |
181 | * \param address access address. | |
182 | * \return pointer to the page structure. | |
b5e89ed5 | 183 | * |
59c51591 | 184 | * Get the mapping, find the real physical page to map, get the page, and |
1da177e4 LT |
185 | * return it. |
186 | */ | |
ca0b07d9 | 187 | static int drm_do_vm_shm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
1da177e4 | 188 | { |
f77d390c | 189 | struct drm_local_map *map = vma->vm_private_data; |
b5e89ed5 DA |
190 | unsigned long offset; |
191 | unsigned long i; | |
192 | struct page *page; | |
1da177e4 | 193 | |
b5e89ed5 | 194 | if (!map) |
ca0b07d9 | 195 | return VM_FAULT_SIGBUS; /* Nothing allocated */ |
1da177e4 | 196 | |
ca0b07d9 | 197 | offset = (unsigned long)vmf->virtual_address - vma->vm_start; |
1da177e4 | 198 | i = (unsigned long)map->handle + offset; |
38315878 | 199 | page = vmalloc_to_page((void *)i); |
1da177e4 | 200 | if (!page) |
ca0b07d9 | 201 | return VM_FAULT_SIGBUS; |
1da177e4 | 202 | get_page(page); |
ca0b07d9 | 203 | vmf->page = page; |
1da177e4 | 204 | |
ca0b07d9 NP |
205 | DRM_DEBUG("shm_fault 0x%lx\n", offset); |
206 | return 0; | |
1da177e4 LT |
207 | } |
208 | ||
1da177e4 LT |
209 | /** |
210 | * \c close method for shared virtual memory. | |
b5e89ed5 | 211 | * |
1da177e4 | 212 | * \param vma virtual memory area. |
b5e89ed5 | 213 | * |
1da177e4 LT |
214 | * Deletes map information if we are the last |
215 | * person to close a mapping and it's not in the global maplist. | |
216 | */ | |
c94f7029 | 217 | static void drm_vm_shm_close(struct vm_area_struct *vma) |
1da177e4 | 218 | { |
84b1fd10 | 219 | struct drm_file *priv = vma->vm_file->private_data; |
2c14f28b | 220 | struct drm_device *dev = priv->minor->dev; |
8fc2fdf4 | 221 | struct drm_vma_entry *pt, *temp; |
f77d390c | 222 | struct drm_local_map *map; |
55910517 | 223 | struct drm_map_list *r_list; |
1da177e4 LT |
224 | int found_maps = 0; |
225 | ||
226 | DRM_DEBUG("0x%08lx,0x%08lx\n", | |
227 | vma->vm_start, vma->vm_end - vma->vm_start); | |
1da177e4 LT |
228 | |
229 | map = vma->vm_private_data; | |
230 | ||
30e2fb18 | 231 | mutex_lock(&dev->struct_mutex); |
bd1b331f | 232 | list_for_each_entry_safe(pt, temp, &dev->vmalist, head) { |
b5e89ed5 DA |
233 | if (pt->vma->vm_private_data == map) |
234 | found_maps++; | |
1da177e4 | 235 | if (pt->vma == vma) { |
bd1b331f | 236 | list_del(&pt->head); |
9a298b2a | 237 | kfree(pt); |
1da177e4 LT |
238 | } |
239 | } | |
bd1b331f | 240 | |
1da177e4 | 241 | /* We were the only map that was found */ |
b5e89ed5 | 242 | if (found_maps == 1 && map->flags & _DRM_REMOVABLE) { |
1da177e4 LT |
243 | /* Check to see if we are in the maplist, if we are not, then |
244 | * we delete this mappings information. | |
245 | */ | |
246 | found_maps = 0; | |
bd1b331f | 247 | list_for_each_entry(r_list, &dev->maplist, head) { |
b5e89ed5 DA |
248 | if (r_list->map == map) |
249 | found_maps++; | |
1da177e4 LT |
250 | } |
251 | ||
b5e89ed5 | 252 | if (!found_maps) { |
9c8da5eb DA |
253 | drm_dma_handle_t dmah; |
254 | ||
1da177e4 LT |
255 | switch (map->type) { |
256 | case _DRM_REGISTERS: | |
257 | case _DRM_FRAME_BUFFER: | |
28185647 | 258 | arch_phys_wc_del(map->mtrr); |
004a7727 | 259 | iounmap(map->handle); |
1da177e4 LT |
260 | break; |
261 | case _DRM_SHM: | |
262 | vfree(map->handle); | |
263 | break; | |
264 | case _DRM_AGP: | |
265 | case _DRM_SCATTER_GATHER: | |
266 | break; | |
2d0f9eaf | 267 | case _DRM_CONSISTENT: |
9c8da5eb DA |
268 | dmah.vaddr = map->handle; |
269 | dmah.busaddr = map->offset; | |
270 | dmah.size = map->size; | |
1c96e84e | 271 | __drm_legacy_pci_free(dev, &dmah); |
2d0f9eaf | 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 */ | |
e1e78533 | 305 | page = virt_to_page((void *)dma->pagelist[page_nr]); |
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); | |
1da177e4 | 412 | |
9a298b2a | 413 | vma_entry = kmalloc(sizeof(*vma_entry), GFP_KERNEL); |
1da177e4 | 414 | if (vma_entry) { |
b5e89ed5 | 415 | vma_entry->vma = vma; |
b5e89ed5 | 416 | vma_entry->pid = current->pid; |
bd1b331f | 417 | list_add(&vma_entry->head, &dev->vmalist); |
1da177e4 LT |
418 | } |
419 | } | |
420 | ||
d7d8aac7 TH |
421 | static void drm_vm_open(struct vm_area_struct *vma) |
422 | { | |
84b1fd10 | 423 | struct drm_file *priv = vma->vm_file->private_data; |
2c14f28b | 424 | struct drm_device *dev = priv->minor->dev; |
d7d8aac7 TH |
425 | |
426 | mutex_lock(&dev->struct_mutex); | |
b06d66be | 427 | drm_vm_open_locked(dev, vma); |
d7d8aac7 TH |
428 | mutex_unlock(&dev->struct_mutex); |
429 | } | |
430 | ||
b06d66be RC |
431 | void drm_vm_close_locked(struct drm_device *dev, |
432 | struct vm_area_struct *vma) | |
1da177e4 | 433 | { |
8fc2fdf4 | 434 | struct drm_vma_entry *pt, *temp; |
1da177e4 LT |
435 | |
436 | DRM_DEBUG("0x%08lx,0x%08lx\n", | |
437 | vma->vm_start, vma->vm_end - vma->vm_start); | |
1da177e4 | 438 | |
bd1b331f | 439 | list_for_each_entry_safe(pt, temp, &dev->vmalist, head) { |
1da177e4 | 440 | if (pt->vma == vma) { |
bd1b331f | 441 | list_del(&pt->head); |
9a298b2a | 442 | kfree(pt); |
1da177e4 LT |
443 | break; |
444 | } | |
445 | } | |
31dfbc93 CW |
446 | } |
447 | ||
448 | /** | |
449 | * \c close method for all virtual memory types. | |
450 | * | |
451 | * \param vma virtual memory area. | |
452 | * | |
453 | * Search the \p vma private data entry in drm_device::vmalist, unlink it, and | |
454 | * free it. | |
455 | */ | |
456 | static void drm_vm_close(struct vm_area_struct *vma) | |
457 | { | |
458 | struct drm_file *priv = vma->vm_file->private_data; | |
459 | struct drm_device *dev = priv->minor->dev; | |
460 | ||
461 | mutex_lock(&dev->struct_mutex); | |
b06d66be | 462 | drm_vm_close_locked(dev, vma); |
30e2fb18 | 463 | mutex_unlock(&dev->struct_mutex); |
1da177e4 LT |
464 | } |
465 | ||
466 | /** | |
467 | * mmap DMA memory. | |
468 | * | |
6c340eac | 469 | * \param file_priv DRM file private. |
1da177e4 LT |
470 | * \param vma virtual memory area. |
471 | * \return zero on success or a negative number on failure. | |
b5e89ed5 | 472 | * |
1da177e4 LT |
473 | * Sets the virtual memory area operations structure to vm_dma_ops, the file |
474 | * pointer, and calls vm_open(). | |
475 | */ | |
c94f7029 | 476 | static int drm_mmap_dma(struct file *filp, struct vm_area_struct *vma) |
1da177e4 | 477 | { |
84b1fd10 DA |
478 | struct drm_file *priv = filp->private_data; |
479 | struct drm_device *dev; | |
cdd55a29 | 480 | struct drm_device_dma *dma; |
b5e89ed5 | 481 | unsigned long length = vma->vm_end - vma->vm_start; |
1da177e4 | 482 | |
2c14f28b | 483 | dev = priv->minor->dev; |
b5e89ed5 | 484 | dma = dev->dma; |
1545085a TH |
485 | DRM_DEBUG("start = 0x%lx, end = 0x%lx, page offset = 0x%lx\n", |
486 | vma->vm_start, vma->vm_end, vma->vm_pgoff); | |
1da177e4 | 487 | |
b5e89ed5 | 488 | /* Length must match exact page count */ |
1da177e4 | 489 | if (!dma || (length >> PAGE_SHIFT) != dma->page_count) { |
1da177e4 LT |
490 | return -EINVAL; |
491 | } | |
1da177e4 | 492 | |
3417f33e GS |
493 | if (!capable(CAP_SYS_ADMIN) && |
494 | (dma->flags & _DRM_DMA_USE_PCI_RO)) { | |
495 | vma->vm_flags &= ~(VM_WRITE | VM_MAYWRITE); | |
496 | #if defined(__i386__) || defined(__x86_64__) | |
497 | pgprot_val(vma->vm_page_prot) &= ~_PAGE_RW; | |
498 | #else | |
499 | /* Ye gads this is ugly. With more thought | |
500 | we could move this up higher and use | |
501 | `protection_map' instead. */ | |
502 | vma->vm_page_prot = | |
503 | __pgprot(pte_val | |
504 | (pte_wrprotect | |
505 | (__pte(pgprot_val(vma->vm_page_prot))))); | |
506 | #endif | |
507 | } | |
508 | ||
b5e89ed5 | 509 | vma->vm_ops = &drm_vm_dma_ops; |
1da177e4 | 510 | |
314e51b9 | 511 | vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; |
1da177e4 | 512 | |
b06d66be | 513 | drm_vm_open_locked(dev, vma); |
1da177e4 LT |
514 | return 0; |
515 | } | |
516 | ||
cbc60ca0 | 517 | static resource_size_t drm_core_get_reg_ofs(struct drm_device *dev) |
1da177e4 LT |
518 | { |
519 | #ifdef __alpha__ | |
82ba3fef | 520 | return dev->hose->dense_mem_base; |
1da177e4 LT |
521 | #else |
522 | return 0; | |
523 | #endif | |
524 | } | |
b5e89ed5 | 525 | |
1da177e4 LT |
526 | /** |
527 | * mmap DMA memory. | |
528 | * | |
6c340eac | 529 | * \param file_priv DRM file private. |
1da177e4 LT |
530 | * \param vma virtual memory area. |
531 | * \return zero on success or a negative number on failure. | |
b5e89ed5 | 532 | * |
1da177e4 LT |
533 | * If the virtual memory area has no offset associated with it then it's a DMA |
534 | * area, so calls mmap_dma(). Otherwise searches the map in drm_device::maplist, | |
535 | * checks that the restricted flag is not set, sets the virtual memory operations | |
536 | * according to the mapping type and remaps the pages. Finally sets the file | |
537 | * pointer and calls vm_open(). | |
538 | */ | |
bfbf3c85 | 539 | static int drm_mmap_locked(struct file *filp, struct vm_area_struct *vma) |
1da177e4 | 540 | { |
84b1fd10 | 541 | struct drm_file *priv = filp->private_data; |
2c14f28b | 542 | struct drm_device *dev = priv->minor->dev; |
f77d390c | 543 | struct drm_local_map *map = NULL; |
41c2e75e | 544 | resource_size_t offset = 0; |
e0be428e | 545 | struct drm_hash_item *hash; |
1da177e4 | 546 | |
1545085a TH |
547 | DRM_DEBUG("start = 0x%lx, end = 0x%lx, page offset = 0x%lx\n", |
548 | vma->vm_start, vma->vm_end, vma->vm_pgoff); | |
1da177e4 | 549 | |
b5e89ed5 DA |
550 | if (!priv->authenticated) |
551 | return -EACCES; | |
1da177e4 LT |
552 | |
553 | /* We check for "dma". On Apple's UniNorth, it's valid to have | |
554 | * the AGP mapped at physical address 0 | |
555 | * --BenH. | |
556 | */ | |
1545085a | 557 | if (!vma->vm_pgoff |
1da177e4 | 558 | #if __OS_HAS_AGP |
b5e89ed5 DA |
559 | && (!dev->agp |
560 | || dev->agp->agp_info.device->vendor != PCI_VENDOR_ID_APPLE) | |
1da177e4 LT |
561 | #endif |
562 | ) | |
563 | return drm_mmap_dma(filp, vma); | |
564 | ||
1545085a | 565 | if (drm_ht_find_item(&dev->map_hash, vma->vm_pgoff, &hash)) { |
8d153f71 TH |
566 | DRM_ERROR("Could not find map\n"); |
567 | return -EINVAL; | |
1da177e4 LT |
568 | } |
569 | ||
55910517 | 570 | map = drm_hash_entry(hash, struct drm_map_list, hash)->map; |
b5e89ed5 | 571 | if (!map || ((map->flags & _DRM_RESTRICTED) && !capable(CAP_SYS_ADMIN))) |
1da177e4 LT |
572 | return -EPERM; |
573 | ||
b5e89ed5 | 574 | /* Check for valid size. */ |
54ba2f76 | 575 | if (map->size < vma->vm_end - vma->vm_start) |
b5e89ed5 | 576 | return -EINVAL; |
1da177e4 LT |
577 | |
578 | if (!capable(CAP_SYS_ADMIN) && (map->flags & _DRM_READ_ONLY)) { | |
579 | vma->vm_flags &= ~(VM_WRITE | VM_MAYWRITE); | |
580 | #if defined(__i386__) || defined(__x86_64__) | |
581 | pgprot_val(vma->vm_page_prot) &= ~_PAGE_RW; | |
582 | #else | |
b5e89ed5 DA |
583 | /* Ye gads this is ugly. With more thought |
584 | we could move this up higher and use | |
585 | `protection_map' instead. */ | |
586 | vma->vm_page_prot = | |
587 | __pgprot(pte_val | |
588 | (pte_wrprotect | |
589 | (__pte(pgprot_val(vma->vm_page_prot))))); | |
1da177e4 LT |
590 | #endif |
591 | } | |
592 | ||
593 | switch (map->type) { | |
4b7fb9b5 | 594 | #if !defined(__arm__) |
b5e89ed5 | 595 | case _DRM_AGP: |
d9906753 | 596 | if (dev->agp && dev->agp->cant_use_aperture) { |
b5e89ed5 DA |
597 | /* |
598 | * On some platforms we can't talk to bus dma address from the CPU, so for | |
599 | * memory of type DRM_AGP, we'll deal with sorting out the real physical | |
ca0b07d9 | 600 | * pages and mappings in fault() |
b5e89ed5 | 601 | */ |
1da177e4 | 602 | #if defined(__powerpc__) |
b5e89ed5 | 603 | pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE; |
1da177e4 | 604 | #endif |
b5e89ed5 DA |
605 | vma->vm_ops = &drm_vm_ops; |
606 | break; | |
607 | } | |
608 | /* fall through to _DRM_FRAME_BUFFER... */ | |
4b7fb9b5 | 609 | #endif |
1da177e4 LT |
610 | case _DRM_FRAME_BUFFER: |
611 | case _DRM_REGISTERS: | |
cbc60ca0 | 612 | offset = drm_core_get_reg_ofs(dev); |
ff47eaf2 | 613 | vma->vm_page_prot = drm_io_prot(map, vma); |
3d77461e | 614 | if (io_remap_pfn_range(vma, vma->vm_start, |
b5e89ed5 DA |
615 | (map->offset + offset) >> PAGE_SHIFT, |
616 | vma->vm_end - vma->vm_start, | |
617 | vma->vm_page_prot)) | |
b5e89ed5 | 618 | return -EAGAIN; |
1da177e4 | 619 | DRM_DEBUG(" Type = %d; start = 0x%lx, end = 0x%lx," |
41c2e75e | 620 | " offset = 0x%llx\n", |
1da177e4 | 621 | map->type, |
41c2e75e | 622 | vma->vm_start, vma->vm_end, (unsigned long long)(map->offset + offset)); |
4b7fb9b5 | 623 | |
1da177e4 LT |
624 | vma->vm_ops = &drm_vm_ops; |
625 | break; | |
2d0f9eaf | 626 | case _DRM_CONSISTENT: |
38315878 | 627 | /* Consistent memory is really like shared memory. But |
ca0b07d9 | 628 | * it's allocated in a different way, so avoid fault */ |
38315878 HD |
629 | if (remap_pfn_range(vma, vma->vm_start, |
630 | page_to_pfn(virt_to_page(map->handle)), | |
631 | vma->vm_end - vma->vm_start, vma->vm_page_prot)) | |
632 | return -EAGAIN; | |
6876b3ba | 633 | vma->vm_page_prot = drm_dma_prot(map->type, vma); |
38315878 HD |
634 | /* fall through to _DRM_SHM */ |
635 | case _DRM_SHM: | |
1da177e4 LT |
636 | vma->vm_ops = &drm_vm_shm_ops; |
637 | vma->vm_private_data = (void *)map; | |
1da177e4 LT |
638 | break; |
639 | case _DRM_SCATTER_GATHER: | |
640 | vma->vm_ops = &drm_vm_sg_ops; | |
641 | vma->vm_private_data = (void *)map; | |
5ff64611 | 642 | vma->vm_page_prot = drm_dma_prot(map->type, vma); |
b5e89ed5 | 643 | break; |
1da177e4 LT |
644 | default: |
645 | return -EINVAL; /* This should never happen. */ | |
646 | } | |
314e51b9 | 647 | vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; |
1da177e4 | 648 | |
b06d66be | 649 | drm_vm_open_locked(dev, vma); |
1da177e4 LT |
650 | return 0; |
651 | } | |
b5e89ed5 | 652 | |
bfbf3c85 | 653 | int drm_legacy_mmap(struct file *filp, struct vm_area_struct *vma) |
d7d8aac7 | 654 | { |
84b1fd10 | 655 | struct drm_file *priv = filp->private_data; |
2c14f28b | 656 | struct drm_device *dev = priv->minor->dev; |
d7d8aac7 TH |
657 | int ret; |
658 | ||
2c07a21d DA |
659 | if (drm_device_is_unplugged(dev)) |
660 | return -ENODEV; | |
661 | ||
d7d8aac7 TH |
662 | mutex_lock(&dev->struct_mutex); |
663 | ret = drm_mmap_locked(filp, vma); | |
664 | mutex_unlock(&dev->struct_mutex); | |
665 | ||
666 | return ret; | |
667 | } | |
bfbf3c85 | 668 | EXPORT_SYMBOL(drm_legacy_mmap); |
03decbe5 DH |
669 | |
670 | void drm_legacy_vma_flush(struct drm_device *dev) | |
671 | { | |
672 | struct drm_vma_entry *vma, *vma_temp; | |
673 | ||
674 | /* Clear vma list (only needed for legacy drivers) */ | |
675 | list_for_each_entry_safe(vma, vma_temp, &dev->vmalist, head) { | |
676 | list_del(&vma->head); | |
677 | kfree(vma); | |
678 | } | |
679 | } | |
680 | ||
03decbe5 DH |
681 | int drm_vma_info(struct seq_file *m, void *data) |
682 | { | |
683 | struct drm_info_node *node = (struct drm_info_node *) m->private; | |
684 | struct drm_device *dev = node->minor->dev; | |
685 | struct drm_vma_entry *pt; | |
686 | struct vm_area_struct *vma; | |
687 | unsigned long vma_count = 0; | |
688 | #if defined(__i386__) | |
689 | unsigned int pgprot; | |
690 | #endif | |
691 | ||
692 | mutex_lock(&dev->struct_mutex); | |
693 | list_for_each_entry(pt, &dev->vmalist, head) | |
694 | vma_count++; | |
695 | ||
696 | seq_printf(m, "vma use count: %lu, high_memory = %pK, 0x%pK\n", | |
697 | vma_count, high_memory, | |
698 | (void *)(unsigned long)virt_to_phys(high_memory)); | |
699 | ||
700 | list_for_each_entry(pt, &dev->vmalist, head) { | |
701 | vma = pt->vma; | |
702 | if (!vma) | |
703 | continue; | |
704 | seq_printf(m, | |
705 | "\n%5d 0x%pK-0x%pK %c%c%c%c%c%c 0x%08lx000", | |
706 | pt->pid, | |
707 | (void *)vma->vm_start, (void *)vma->vm_end, | |
708 | vma->vm_flags & VM_READ ? 'r' : '-', | |
709 | vma->vm_flags & VM_WRITE ? 'w' : '-', | |
710 | vma->vm_flags & VM_EXEC ? 'x' : '-', | |
711 | vma->vm_flags & VM_MAYSHARE ? 's' : 'p', | |
712 | vma->vm_flags & VM_LOCKED ? 'l' : '-', | |
713 | vma->vm_flags & VM_IO ? 'i' : '-', | |
714 | vma->vm_pgoff); | |
715 | ||
716 | #if defined(__i386__) | |
717 | pgprot = pgprot_val(vma->vm_page_prot); | |
718 | seq_printf(m, " %c%c%c%c%c%c%c%c%c", | |
719 | pgprot & _PAGE_PRESENT ? 'p' : '-', | |
720 | pgprot & _PAGE_RW ? 'w' : 'r', | |
721 | pgprot & _PAGE_USER ? 'u' : 's', | |
722 | pgprot & _PAGE_PWT ? 't' : 'b', | |
723 | pgprot & _PAGE_PCD ? 'u' : 'c', | |
724 | pgprot & _PAGE_ACCESSED ? 'a' : '-', | |
725 | pgprot & _PAGE_DIRTY ? 'd' : '-', | |
726 | pgprot & _PAGE_PSE ? 'm' : 'k', | |
727 | pgprot & _PAGE_GLOBAL ? 'g' : 'l'); | |
728 | #endif | |
729 | seq_printf(m, "\n"); | |
730 | } | |
731 | mutex_unlock(&dev->struct_mutex); | |
732 | return 0; | |
733 | } |