blob: 644ec9dadc0549ffbbd7df7a33f57eca78c135cd [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/**
2 * \file drm_vm.h
3 * Memory mapping for DRM
4 *
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
Dave Airliec94f7022005-07-07 21:03:38 +100041static void drm_vm_open(struct vm_area_struct *vma);
42static void drm_vm_close(struct vm_area_struct *vma);
Linus Torvalds1da177e2005-04-16 15:20:36 -070043
44/**
45 * \c nopage method for AGP virtual memory.
46 *
47 * \param vma virtual memory area.
48 * \param address access address.
49 * \return pointer to the page structure.
50 *
51 * Find the right map and if it's AGP memory find the real physical page to
52 * map, get the page, increment the use count and return it.
53 */
54#if __OS_HAS_AGP
55static __inline__ struct page *drm_do_vm_nopage(struct vm_area_struct *vma,
56 unsigned long address)
57{
58 drm_file_t *priv = vma->vm_file->private_data;
59 drm_device_t *dev = priv->head->dev;
60 drm_map_t *map = NULL;
61 drm_map_list_t *r_list;
62 struct list_head *list;
63
64 /*
65 * Find the right map
66 */
67 if (!drm_core_has_AGP(dev))
68 goto vm_nopage_error;
69
70 if(!dev->agp || !dev->agp->cant_use_aperture) goto vm_nopage_error;
71
72 list_for_each(list, &dev->maplist->head) {
73 r_list = list_entry(list, drm_map_list_t, head);
74 map = r_list->map;
75 if (!map) continue;
76 if (map->offset == VM_OFFSET(vma)) break;
77 }
78
79 if (map && map->type == _DRM_AGP) {
80 unsigned long offset = address - vma->vm_start;
81 unsigned long baddr = VM_OFFSET(vma) + offset;
82 struct drm_agp_mem *agpmem;
83 struct page *page;
84
85#ifdef __alpha__
86 /*
87 * Adjust to a bus-relative address
88 */
89 baddr -= dev->hose->mem_space->start;
90#endif
91
92 /*
93 * It's AGP memory - find the real physical page to map
94 */
95 for(agpmem = dev->agp->memory; agpmem; agpmem = agpmem->next) {
96 if (agpmem->bound <= baddr &&
97 agpmem->bound + agpmem->pages * PAGE_SIZE > baddr)
98 break;
99 }
100
101 if (!agpmem) goto vm_nopage_error;
102
103 /*
104 * Get the page, inc the use count, and return it
105 */
106 offset = (baddr - agpmem->bound) >> PAGE_SHIFT;
107 page = virt_to_page(__va(agpmem->memory->memory[offset]));
108 get_page(page);
109
110 DRM_DEBUG("baddr = 0x%lx page = 0x%p, offset = 0x%lx, count=%d\n",
111 baddr, __va(agpmem->memory->memory[offset]), offset,
112 page_count(page));
113
114 return page;
115 }
116vm_nopage_error:
117 return NOPAGE_SIGBUS; /* Disallow mremap */
118}
119#else /* __OS_HAS_AGP */
120static __inline__ struct page *drm_do_vm_nopage(struct vm_area_struct *vma,
121 unsigned long address)
122{
123 return NOPAGE_SIGBUS;
124}
125#endif /* __OS_HAS_AGP */
126
127/**
128 * \c nopage method for shared virtual memory.
129 *
130 * \param vma virtual memory area.
131 * \param address access address.
132 * \return pointer to the page structure.
133 *
134 * Get the the mapping, find the real physical page to map, get the page, and
135 * return it.
136 */
137static __inline__ struct page *drm_do_vm_shm_nopage(struct vm_area_struct *vma,
138 unsigned long address)
139{
140 drm_map_t *map = (drm_map_t *)vma->vm_private_data;
141 unsigned long offset;
142 unsigned long i;
143 struct page *page;
144
145 if (address > vma->vm_end) return NOPAGE_SIGBUS; /* Disallow mremap */
146 if (!map) return NOPAGE_OOM; /* Nothing allocated */
147
148 offset = address - vma->vm_start;
149 i = (unsigned long)map->handle + offset;
150 page = vmalloc_to_page((void *)i);
151 if (!page)
152 return NOPAGE_OOM;
153 get_page(page);
154
155 DRM_DEBUG("shm_nopage 0x%lx\n", address);
156 return page;
157}
158
159
160/**
161 * \c close method for shared virtual memory.
162 *
163 * \param vma virtual memory area.
164 *
165 * Deletes map information if we are the last
166 * person to close a mapping and it's not in the global maplist.
167 */
Dave Airliec94f7022005-07-07 21:03:38 +1000168static void drm_vm_shm_close(struct vm_area_struct *vma)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169{
170 drm_file_t *priv = vma->vm_file->private_data;
171 drm_device_t *dev = priv->head->dev;
172 drm_vma_entry_t *pt, *prev, *next;
173 drm_map_t *map;
174 drm_map_list_t *r_list;
175 struct list_head *list;
176 int found_maps = 0;
177
178 DRM_DEBUG("0x%08lx,0x%08lx\n",
179 vma->vm_start, vma->vm_end - vma->vm_start);
180 atomic_dec(&dev->vma_count);
181
182 map = vma->vm_private_data;
183
184 down(&dev->struct_sem);
185 for (pt = dev->vmalist, prev = NULL; pt; pt = next) {
186 next = pt->next;
187 if (pt->vma->vm_private_data == map) found_maps++;
188 if (pt->vma == vma) {
189 if (prev) {
190 prev->next = pt->next;
191 } else {
192 dev->vmalist = pt->next;
193 }
194 drm_free(pt, sizeof(*pt), DRM_MEM_VMAS);
195 } else {
196 prev = pt;
197 }
198 }
199 /* We were the only map that was found */
200 if(found_maps == 1 &&
201 map->flags & _DRM_REMOVABLE) {
202 /* Check to see if we are in the maplist, if we are not, then
203 * we delete this mappings information.
204 */
205 found_maps = 0;
206 list = &dev->maplist->head;
207 list_for_each(list, &dev->maplist->head) {
208 r_list = list_entry(list, drm_map_list_t, head);
209 if (r_list->map == map) found_maps++;
210 }
211
212 if(!found_maps) {
213 switch (map->type) {
214 case _DRM_REGISTERS:
215 case _DRM_FRAME_BUFFER:
216 if (drm_core_has_MTRR(dev) && map->mtrr >= 0) {
217 int retcode;
218 retcode = mtrr_del(map->mtrr,
219 map->offset,
220 map->size);
221 DRM_DEBUG("mtrr_del = %d\n", retcode);
222 }
223 drm_ioremapfree(map->handle, map->size, dev);
224 break;
225 case _DRM_SHM:
226 vfree(map->handle);
227 break;
228 case _DRM_AGP:
229 case _DRM_SCATTER_GATHER:
230 break;
Dave Airlie2d0f9ea2005-07-10 14:34:13 +1000231 case _DRM_CONSISTENT:
232 drm_pci_free(dev, map->size, map->handle,
233 map->offset);
234 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235 }
236 drm_free(map, sizeof(*map), DRM_MEM_MAPS);
237 }
238 }
239 up(&dev->struct_sem);
240}
241
242/**
243 * \c nopage method for DMA virtual memory.
244 *
245 * \param vma virtual memory area.
246 * \param address access address.
247 * \return pointer to the page structure.
248 *
249 * Determine the page number from the page offset and get it from drm_device_dma::pagelist.
250 */
251static __inline__ struct page *drm_do_vm_dma_nopage(struct vm_area_struct *vma,
252 unsigned long address)
253{
254 drm_file_t *priv = vma->vm_file->private_data;
255 drm_device_t *dev = priv->head->dev;
256 drm_device_dma_t *dma = dev->dma;
257 unsigned long offset;
258 unsigned long page_nr;
259 struct page *page;
260
261 if (!dma) return NOPAGE_SIGBUS; /* Error */
262 if (address > vma->vm_end) return NOPAGE_SIGBUS; /* Disallow mremap */
263 if (!dma->pagelist) return NOPAGE_OOM ; /* Nothing allocated */
264
265 offset = address - vma->vm_start; /* vm_[pg]off[set] should be 0 */
266 page_nr = offset >> PAGE_SHIFT;
267 page = virt_to_page((dma->pagelist[page_nr] +
268 (offset & (~PAGE_MASK))));
269
270 get_page(page);
271
272 DRM_DEBUG("dma_nopage 0x%lx (page %lu)\n", address, page_nr);
273 return page;
274}
275
276/**
277 * \c nopage method for scatter-gather virtual memory.
278 *
279 * \param vma virtual memory area.
280 * \param address access address.
281 * \return pointer to the page structure.
282 *
283 * Determine the map offset from the page offset and get it from drm_sg_mem::pagelist.
284 */
285static __inline__ struct page *drm_do_vm_sg_nopage(struct vm_area_struct *vma,
286 unsigned long address)
287{
288 drm_map_t *map = (drm_map_t *)vma->vm_private_data;
289 drm_file_t *priv = vma->vm_file->private_data;
290 drm_device_t *dev = priv->head->dev;
291 drm_sg_mem_t *entry = dev->sg;
292 unsigned long offset;
293 unsigned long map_offset;
294 unsigned long page_offset;
295 struct page *page;
296
297 if (!entry) return NOPAGE_SIGBUS; /* Error */
298 if (address > vma->vm_end) return NOPAGE_SIGBUS; /* Disallow mremap */
299 if (!entry->pagelist) return NOPAGE_OOM ; /* Nothing allocated */
300
301
302 offset = address - vma->vm_start;
303 map_offset = map->offset - dev->sg->handle;
304 page_offset = (offset >> PAGE_SHIFT) + (map_offset >> PAGE_SHIFT);
305 page = entry->pagelist[page_offset];
306 get_page(page);
307
308 return page;
309}
310
311
312#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,0)
313
314static struct page *drm_vm_nopage(struct vm_area_struct *vma,
315 unsigned long address,
316 int *type) {
317 if (type) *type = VM_FAULT_MINOR;
318 return drm_do_vm_nopage(vma, address);
319}
320
321static struct page *drm_vm_shm_nopage(struct vm_area_struct *vma,
322 unsigned long address,
323 int *type) {
324 if (type) *type = VM_FAULT_MINOR;
325 return drm_do_vm_shm_nopage(vma, address);
326}
327
328static struct page *drm_vm_dma_nopage(struct vm_area_struct *vma,
329 unsigned long address,
330 int *type) {
331 if (type) *type = VM_FAULT_MINOR;
332 return drm_do_vm_dma_nopage(vma, address);
333}
334
335static struct page *drm_vm_sg_nopage(struct vm_area_struct *vma,
336 unsigned long address,
337 int *type) {
338 if (type) *type = VM_FAULT_MINOR;
339 return drm_do_vm_sg_nopage(vma, address);
340}
341
342#else /* LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,0) */
343
344static struct page *drm_vm_nopage(struct vm_area_struct *vma,
345 unsigned long address,
346 int unused) {
347 return drm_do_vm_nopage(vma, address);
348}
349
350static struct page *drm_vm_shm_nopage(struct vm_area_struct *vma,
351 unsigned long address,
352 int unused) {
353 return drm_do_vm_shm_nopage(vma, address);
354}
355
356static struct page *drm_vm_dma_nopage(struct vm_area_struct *vma,
357 unsigned long address,
358 int unused) {
359 return drm_do_vm_dma_nopage(vma, address);
360}
361
362static struct page *drm_vm_sg_nopage(struct vm_area_struct *vma,
363 unsigned long address,
364 int unused) {
365 return drm_do_vm_sg_nopage(vma, address);
366}
367
368#endif
369
370
371/** AGP virtual memory operations */
372static struct vm_operations_struct drm_vm_ops = {
373 .nopage = drm_vm_nopage,
374 .open = drm_vm_open,
375 .close = drm_vm_close,
376};
377
378/** Shared virtual memory operations */
379static struct vm_operations_struct drm_vm_shm_ops = {
380 .nopage = drm_vm_shm_nopage,
381 .open = drm_vm_open,
382 .close = drm_vm_shm_close,
383};
384
385/** DMA virtual memory operations */
386static struct vm_operations_struct drm_vm_dma_ops = {
387 .nopage = drm_vm_dma_nopage,
388 .open = drm_vm_open,
389 .close = drm_vm_close,
390};
391
392/** Scatter-gather virtual memory operations */
393static struct vm_operations_struct drm_vm_sg_ops = {
394 .nopage = drm_vm_sg_nopage,
395 .open = drm_vm_open,
396 .close = drm_vm_close,
397};
398
399
400/**
401 * \c open method for shared virtual memory.
402 *
403 * \param vma virtual memory area.
404 *
405 * Create a new drm_vma_entry structure as the \p vma private data entry and
406 * add it to drm_device::vmalist.
407 */
Dave Airliec94f7022005-07-07 21:03:38 +1000408static void drm_vm_open(struct vm_area_struct *vma)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409{
410 drm_file_t *priv = vma->vm_file->private_data;
411 drm_device_t *dev = priv->head->dev;
412 drm_vma_entry_t *vma_entry;
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
418 vma_entry = drm_alloc(sizeof(*vma_entry), DRM_MEM_VMAS);
419 if (vma_entry) {
420 down(&dev->struct_sem);
421 vma_entry->vma = vma;
422 vma_entry->next = dev->vmalist;
423 vma_entry->pid = current->pid;
424 dev->vmalist = vma_entry;
425 up(&dev->struct_sem);
426 }
427}
428
429/**
430 * \c close method for all virtual memory types.
431 *
432 * \param vma virtual memory area.
433 *
434 * Search the \p vma private data entry in drm_device::vmalist, unlink it, and
435 * free it.
436 */
Dave Airliec94f7022005-07-07 21:03:38 +1000437static void drm_vm_close(struct vm_area_struct *vma)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438{
439 drm_file_t *priv = vma->vm_file->private_data;
440 drm_device_t *dev = priv->head->dev;
441 drm_vma_entry_t *pt, *prev;
442
443 DRM_DEBUG("0x%08lx,0x%08lx\n",
444 vma->vm_start, vma->vm_end - vma->vm_start);
445 atomic_dec(&dev->vma_count);
446
447 down(&dev->struct_sem);
448 for (pt = dev->vmalist, prev = NULL; pt; prev = pt, pt = pt->next) {
449 if (pt->vma == vma) {
450 if (prev) {
451 prev->next = pt->next;
452 } else {
453 dev->vmalist = pt->next;
454 }
455 drm_free(pt, sizeof(*pt), DRM_MEM_VMAS);
456 break;
457 }
458 }
459 up(&dev->struct_sem);
460}
461
462/**
463 * mmap DMA memory.
464 *
465 * \param filp file pointer.
466 * \param vma virtual memory area.
467 * \return zero on success or a negative number on failure.
468 *
469 * Sets the virtual memory area operations structure to vm_dma_ops, the file
470 * pointer, and calls vm_open().
471 */
Dave Airliec94f7022005-07-07 21:03:38 +1000472static int drm_mmap_dma(struct file *filp, struct vm_area_struct *vma)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473{
474 drm_file_t *priv = filp->private_data;
475 drm_device_t *dev;
476 drm_device_dma_t *dma;
477 unsigned long length = vma->vm_end - vma->vm_start;
478
479 lock_kernel();
480 dev = priv->head->dev;
481 dma = dev->dma;
482 DRM_DEBUG("start = 0x%lx, end = 0x%lx, offset = 0x%lx\n",
483 vma->vm_start, vma->vm_end, VM_OFFSET(vma));
484
485 /* Length must match exact page count */
486 if (!dma || (length >> PAGE_SHIFT) != dma->page_count) {
487 unlock_kernel();
488 return -EINVAL;
489 }
490 unlock_kernel();
491
492 vma->vm_ops = &drm_vm_dma_ops;
493
494#if LINUX_VERSION_CODE <= 0x02040e /* KERNEL_VERSION(2,4,14) */
495 vma->vm_flags |= VM_LOCKED | VM_SHM; /* Don't swap */
496#else
497 vma->vm_flags |= VM_RESERVED; /* Don't swap */
498#endif
499
500 vma->vm_file = filp; /* Needed for drm_vm_open() */
501 drm_vm_open(vma);
502 return 0;
503}
504
505unsigned long drm_core_get_map_ofs(drm_map_t *map)
506{
507 return map->offset;
508}
509EXPORT_SYMBOL(drm_core_get_map_ofs);
510
511unsigned long drm_core_get_reg_ofs(struct drm_device *dev)
512{
513#ifdef __alpha__
514 return dev->hose->dense_mem_base - dev->hose->mem_space->start;
515#else
516 return 0;
517#endif
518}
519EXPORT_SYMBOL(drm_core_get_reg_ofs);
520
521/**
522 * mmap DMA memory.
523 *
524 * \param filp file pointer.
525 * \param vma virtual memory area.
526 * \return zero on success or a negative number on failure.
527 *
528 * If the virtual memory area has no offset associated with it then it's a DMA
529 * area, so calls mmap_dma(). Otherwise searches the map in drm_device::maplist,
530 * checks that the restricted flag is not set, sets the virtual memory operations
531 * according to the mapping type and remaps the pages. Finally sets the file
532 * pointer and calls vm_open().
533 */
534int drm_mmap(struct file *filp, struct vm_area_struct *vma)
535{
536 drm_file_t *priv = filp->private_data;
537 drm_device_t *dev = priv->head->dev;
538 drm_map_t *map = NULL;
539 drm_map_list_t *r_list;
540 unsigned long offset = 0;
541 struct list_head *list;
542
543 DRM_DEBUG("start = 0x%lx, end = 0x%lx, offset = 0x%lx\n",
544 vma->vm_start, vma->vm_end, VM_OFFSET(vma));
545
546 if ( !priv->authenticated ) return -EACCES;
547
548 /* We check for "dma". On Apple's UniNorth, it's valid to have
549 * the AGP mapped at physical address 0
550 * --BenH.
551 */
552 if (!VM_OFFSET(vma)
553#if __OS_HAS_AGP
554 && (!dev->agp || dev->agp->agp_info.device->vendor != PCI_VENDOR_ID_APPLE)
555#endif
556 )
557 return drm_mmap_dma(filp, vma);
558
559 /* A sequential search of a linked list is
560 fine here because: 1) there will only be
561 about 5-10 entries in the list and, 2) a
562 DRI client only has to do this mapping
563 once, so it doesn't have to be optimized
564 for performance, even if the list was a
565 bit longer. */
566 list_for_each(list, &dev->maplist->head) {
567 unsigned long off;
568
569 r_list = list_entry(list, drm_map_list_t, head);
570 map = r_list->map;
571 if (!map) continue;
572 off = dev->driver->get_map_ofs(map);
573 if (off == VM_OFFSET(vma)) break;
574 }
575
576 if (!map || ((map->flags&_DRM_RESTRICTED) && !capable(CAP_SYS_ADMIN)))
577 return -EPERM;
578
579 /* Check for valid size. */
580 if (map->size != vma->vm_end - vma->vm_start) return -EINVAL;
581
582 if (!capable(CAP_SYS_ADMIN) && (map->flags & _DRM_READ_ONLY)) {
583 vma->vm_flags &= ~(VM_WRITE | VM_MAYWRITE);
584#if defined(__i386__) || defined(__x86_64__)
585 pgprot_val(vma->vm_page_prot) &= ~_PAGE_RW;
586#else
587 /* Ye gads this is ugly. With more thought
588 we could move this up higher and use
589 `protection_map' instead. */
590 vma->vm_page_prot = __pgprot(pte_val(pte_wrprotect(
591 __pte(pgprot_val(vma->vm_page_prot)))));
592#endif
593 }
594
595 switch (map->type) {
596 case _DRM_AGP:
597 if (drm_core_has_AGP(dev) && dev->agp->cant_use_aperture) {
598 /*
599 * On some platforms we can't talk to bus dma address from the CPU, so for
600 * memory of type DRM_AGP, we'll deal with sorting out the real physical
601 * pages and mappings in nopage()
602 */
603#if defined(__powerpc__)
604 pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE;
605#endif
606 vma->vm_ops = &drm_vm_ops;
607 break;
608 }
609 /* fall through to _DRM_FRAME_BUFFER... */
610 case _DRM_FRAME_BUFFER:
611 case _DRM_REGISTERS:
612 if (VM_OFFSET(vma) >= __pa(high_memory)) {
613#if defined(__i386__) || defined(__x86_64__)
614 if (boot_cpu_data.x86 > 3 && map->type != _DRM_AGP) {
615 pgprot_val(vma->vm_page_prot) |= _PAGE_PCD;
616 pgprot_val(vma->vm_page_prot) &= ~_PAGE_PWT;
617 }
618#elif defined(__powerpc__)
619 pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE | _PAGE_GUARDED;
620#endif
621 vma->vm_flags |= VM_IO; /* not in core dump */
622 }
623#if defined(__ia64__)
624 if (efi_range_is_wc(vma->vm_start, vma->vm_end -
625 vma->vm_start))
626 vma->vm_page_prot =
627 pgprot_writecombine(vma->vm_page_prot);
628 else
629 vma->vm_page_prot =
630 pgprot_noncached(vma->vm_page_prot);
631#endif
632 offset = dev->driver->get_reg_ofs(dev);
633#ifdef __sparc__
634 if (io_remap_pfn_range(DRM_RPR_ARG(vma) vma->vm_start,
635 (VM_OFFSET(vma) + offset) >> PAGE_SHIFT,
636 vma->vm_end - vma->vm_start,
637 vma->vm_page_prot))
638#else
639 if (io_remap_pfn_range(vma, vma->vm_start,
640 (VM_OFFSET(vma) + offset) >> PAGE_SHIFT,
641 vma->vm_end - vma->vm_start,
642 vma->vm_page_prot))
643#endif
644 return -EAGAIN;
645 DRM_DEBUG(" Type = %d; start = 0x%lx, end = 0x%lx,"
646 " offset = 0x%lx\n",
647 map->type,
648 vma->vm_start, vma->vm_end, VM_OFFSET(vma) + offset);
649 vma->vm_ops = &drm_vm_ops;
650 break;
651 case _DRM_SHM:
Dave Airlie2d0f9ea2005-07-10 14:34:13 +1000652 case _DRM_CONSISTENT:
653 /* Consistent memory is really like shared memory. It's only
654 * allocate in a different way */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700655 vma->vm_ops = &drm_vm_shm_ops;
656 vma->vm_private_data = (void *)map;
657 /* Don't let this area swap. Change when
658 DRM_KERNEL advisory is supported. */
659#if LINUX_VERSION_CODE <= 0x02040e /* KERNEL_VERSION(2,4,14) */
660 vma->vm_flags |= VM_LOCKED;
661#else
662 vma->vm_flags |= VM_RESERVED;
663#endif
664 break;
665 case _DRM_SCATTER_GATHER:
666 vma->vm_ops = &drm_vm_sg_ops;
667 vma->vm_private_data = (void *)map;
668#if LINUX_VERSION_CODE <= 0x02040e /* KERNEL_VERSION(2,4,14) */
669 vma->vm_flags |= VM_LOCKED;
670#else
671 vma->vm_flags |= VM_RESERVED;
672#endif
673 break;
674 default:
675 return -EINVAL; /* This should never happen. */
676 }
677#if LINUX_VERSION_CODE <= 0x02040e /* KERNEL_VERSION(2,4,14) */
678 vma->vm_flags |= VM_LOCKED | VM_SHM; /* Don't swap */
679#else
680 vma->vm_flags |= VM_RESERVED; /* Don't swap */
681#endif
682
683 vma->vm_file = filp; /* Needed for drm_vm_open() */
684 drm_vm_open(vma);
685 return 0;
686}
687EXPORT_SYMBOL(drm_mmap);