blob: ee879d6bb5225b5c7eeab06d4c6ece819b5f414a [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/**
Dave Airlieb5e89ed2005-09-25 14:28:13 +10002 * \file drm_vm.c
Linus Torvalds1da177e2005-04-16 15:20:36 -07003 * Memory mapping for DRM
Dave Airlieb5e89ed2005-09-25 14:28:13 +10004 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07005 * \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>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090039#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070040#endif
41
Dave Airliec94f7022005-07-07 21:03:38 +100042static void drm_vm_open(struct vm_area_struct *vma);
43static void drm_vm_close(struct vm_area_struct *vma);
Linus Torvalds1da177e2005-04-16 15:20:36 -070044
Adrian Bunk0bead7c2007-03-11 11:41:16 +110045static pgprot_t drm_io_prot(uint32_t map_type, struct vm_area_struct *vma)
Dave Airlie5cc7f9a2007-02-10 11:53:13 +110046{
47 pgprot_t tmp = vm_get_page_prot(vma->vm_flags);
48
49#if defined(__i386__) || defined(__x86_64__)
50 if (boot_cpu_data.x86 > 3 && map_type != _DRM_AGP) {
51 pgprot_val(tmp) |= _PAGE_PCD;
52 pgprot_val(tmp) &= ~_PAGE_PWT;
53 }
54#elif defined(__powerpc__)
55 pgprot_val(tmp) |= _PAGE_NO_CACHE;
56 if (map_type == _DRM_REGISTERS)
57 pgprot_val(tmp) |= _PAGE_GUARDED;
Benjamin Herrenschmidt6876b3b2008-03-28 14:23:07 -070058#elif defined(__ia64__)
Dave Airlie5cc7f9a2007-02-10 11:53:13 +110059 if (efi_range_is_wc(vma->vm_start, vma->vm_end -
60 vma->vm_start))
61 tmp = pgprot_writecombine(tmp);
62 else
63 tmp = pgprot_noncached(tmp);
Jordan Crouse4b7fb9b2010-05-27 13:40:26 -060064#elif defined(__sparc__) || defined(__arm__)
Benjamin Herrenschmidt6876b3b2008-03-28 14:23:07 -070065 tmp = pgprot_noncached(tmp);
66#endif
67 return tmp;
68}
69
70static pgprot_t drm_dma_prot(uint32_t map_type, struct vm_area_struct *vma)
71{
72 pgprot_t tmp = vm_get_page_prot(vma->vm_flags);
73
74#if defined(__powerpc__) && defined(CONFIG_NOT_COHERENT_CACHE)
75 tmp |= _PAGE_NO_CACHE;
Dave Airlie5cc7f9a2007-02-10 11:53:13 +110076#endif
77 return tmp;
78}
79
Linus Torvalds1da177e2005-04-16 15:20:36 -070080/**
Nick Pigginca0b07d2008-02-07 16:20:50 +100081 * \c fault method for AGP virtual memory.
Linus Torvalds1da177e2005-04-16 15:20:36 -070082 *
83 * \param vma virtual memory area.
84 * \param address access address.
85 * \return pointer to the page structure.
Dave Airlieb5e89ed2005-09-25 14:28:13 +100086 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070087 * Find the right map and if it's AGP memory find the real physical page to
88 * map, get the page, increment the use count and return it.
89 */
90#if __OS_HAS_AGP
Nick Pigginca0b07d2008-02-07 16:20:50 +100091static int drm_do_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
Linus Torvalds1da177e2005-04-16 15:20:36 -070092{
Dave Airlie84b1fd12007-07-11 15:53:27 +100093 struct drm_file *priv = vma->vm_file->private_data;
Dave Airlie2c14f282008-04-21 16:47:32 +100094 struct drm_device *dev = priv->minor->dev;
Benjamin Herrenschmidtf77d3902009-02-02 16:55:46 +110095 struct drm_local_map *map = NULL;
Dave Airlie55910512007-07-11 16:53:40 +100096 struct drm_map_list *r_list;
Dave Airliee0be4282007-07-12 10:26:44 +100097 struct drm_hash_item *hash;
Linus Torvalds1da177e2005-04-16 15:20:36 -070098
99 /*
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000100 * Find the right map
101 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102 if (!drm_core_has_AGP(dev))
Nick Pigginca0b07d2008-02-07 16:20:50 +1000103 goto vm_fault_error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000105 if (!dev->agp || !dev->agp->cant_use_aperture)
Nick Pigginca0b07d2008-02-07 16:20:50 +1000106 goto vm_fault_error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107
Thomas Hellstrom15450852007-02-08 16:14:05 +1100108 if (drm_ht_find_item(&dev->map_hash, vma->vm_pgoff, &hash))
Nick Pigginca0b07d2008-02-07 16:20:50 +1000109 goto vm_fault_error;
Thomas Hellstrom8d153f72006-08-07 22:36:47 +1000110
Dave Airlie55910512007-07-11 16:53:40 +1000111 r_list = drm_hash_entry(hash, struct drm_map_list, hash);
Thomas Hellstrom8d153f72006-08-07 22:36:47 +1000112 map = r_list->map;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113
114 if (map && map->type == _DRM_AGP) {
Nick Pigginca0b07d2008-02-07 16:20:50 +1000115 /*
116 * Using vm_pgoff as a selector forces us to use this unusual
117 * addressing scheme.
118 */
Benjamin Herrenschmidt41c2e752009-02-02 16:55:47 +1100119 resource_size_t offset = (unsigned long)vmf->virtual_address -
120 vma->vm_start;
121 resource_size_t baddr = map->offset + offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122 struct drm_agp_mem *agpmem;
123 struct page *page;
124
125#ifdef __alpha__
126 /*
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000127 * Adjust to a bus-relative address
128 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129 baddr -= dev->hose->mem_space->start;
130#endif
131
132 /*
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000133 * It's AGP memory - find the real physical page to map
134 */
Dave Airliebd1b3312007-05-26 05:01:51 +1000135 list_for_each_entry(agpmem, &dev->agp->memory, head) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136 if (agpmem->bound <= baddr &&
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000137 agpmem->bound + agpmem->pages * PAGE_SIZE > baddr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138 break;
139 }
140
Dan Carpenter161c4812010-08-19 11:39:57 +0200141 if (&agpmem->head == &dev->agp->memory)
Nick Pigginca0b07d2008-02-07 16:20:50 +1000142 goto vm_fault_error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143
144 /*
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000145 * Get the page, inc the use count, and return it
146 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147 offset = (baddr - agpmem->bound) >> PAGE_SHIFT;
Dave Airlie07613ba2009-06-12 14:11:41 +1000148 page = agpmem->memory->pages[offset];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149 get_page(page);
Nick Pigginca0b07d2008-02-07 16:20:50 +1000150 vmf->page = page;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000152 DRM_DEBUG
Benjamin Herrenschmidt41c2e752009-02-02 16:55:47 +1100153 ("baddr = 0x%llx page = 0x%p, offset = 0x%llx, count=%d\n",
154 (unsigned long long)baddr,
Dave Airlie07613ba2009-06-12 14:11:41 +1000155 agpmem->memory->pages[offset],
Benjamin Herrenschmidt41c2e752009-02-02 16:55:47 +1100156 (unsigned long long)offset,
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000157 page_count(page));
Nick Pigginca0b07d2008-02-07 16:20:50 +1000158 return 0;
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000159 }
Nick Pigginca0b07d2008-02-07 16:20:50 +1000160vm_fault_error:
161 return VM_FAULT_SIGBUS; /* Disallow mremap */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162}
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000163#else /* __OS_HAS_AGP */
Nick Pigginca0b07d2008-02-07 16:20:50 +1000164static int drm_do_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165{
Nick Pigginca0b07d2008-02-07 16:20:50 +1000166 return VM_FAULT_SIGBUS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167}
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000168#endif /* __OS_HAS_AGP */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169
170/**
171 * \c nopage method for shared virtual memory.
172 *
173 * \param vma virtual memory area.
174 * \param address access address.
175 * \return pointer to the page structure.
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000176 *
Michael Opdenacker59c51592007-05-09 08:57:56 +0200177 * Get the mapping, find the real physical page to map, get the page, and
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178 * return it.
179 */
Nick Pigginca0b07d2008-02-07 16:20:50 +1000180static int drm_do_vm_shm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181{
Benjamin Herrenschmidtf77d3902009-02-02 16:55:46 +1100182 struct drm_local_map *map = vma->vm_private_data;
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000183 unsigned long offset;
184 unsigned long i;
185 struct page *page;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000187 if (!map)
Nick Pigginca0b07d2008-02-07 16:20:50 +1000188 return VM_FAULT_SIGBUS; /* Nothing allocated */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189
Nick Pigginca0b07d2008-02-07 16:20:50 +1000190 offset = (unsigned long)vmf->virtual_address - vma->vm_start;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191 i = (unsigned long)map->handle + offset;
Hugh Dickins38315872007-03-24 17:55:16 +1100192 page = vmalloc_to_page((void *)i);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193 if (!page)
Nick Pigginca0b07d2008-02-07 16:20:50 +1000194 return VM_FAULT_SIGBUS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195 get_page(page);
Nick Pigginca0b07d2008-02-07 16:20:50 +1000196 vmf->page = page;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197
Nick Pigginca0b07d2008-02-07 16:20:50 +1000198 DRM_DEBUG("shm_fault 0x%lx\n", offset);
199 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200}
201
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202/**
203 * \c close method for shared virtual memory.
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000204 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205 * \param vma virtual memory area.
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000206 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207 * Deletes map information if we are the last
208 * person to close a mapping and it's not in the global maplist.
209 */
Dave Airliec94f7022005-07-07 21:03:38 +1000210static void drm_vm_shm_close(struct vm_area_struct *vma)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211{
Dave Airlie84b1fd12007-07-11 15:53:27 +1000212 struct drm_file *priv = vma->vm_file->private_data;
Dave Airlie2c14f282008-04-21 16:47:32 +1000213 struct drm_device *dev = priv->minor->dev;
Dave Airlie8fc2fdf2007-07-11 16:21:47 +1000214 struct drm_vma_entry *pt, *temp;
Benjamin Herrenschmidtf77d3902009-02-02 16:55:46 +1100215 struct drm_local_map *map;
Dave Airlie55910512007-07-11 16:53:40 +1000216 struct drm_map_list *r_list;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217 int found_maps = 0;
218
219 DRM_DEBUG("0x%08lx,0x%08lx\n",
220 vma->vm_start, vma->vm_end - vma->vm_start);
221 atomic_dec(&dev->vma_count);
222
223 map = vma->vm_private_data;
224
Dave Airlie30e2fb12006-02-02 19:37:46 +1100225 mutex_lock(&dev->struct_mutex);
Dave Airliebd1b3312007-05-26 05:01:51 +1000226 list_for_each_entry_safe(pt, temp, &dev->vmalist, head) {
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000227 if (pt->vma->vm_private_data == map)
228 found_maps++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229 if (pt->vma == vma) {
Dave Airliebd1b3312007-05-26 05:01:51 +1000230 list_del(&pt->head);
Eric Anholt9a298b22009-03-24 12:23:04 -0700231 kfree(pt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232 }
233 }
Dave Airliebd1b3312007-05-26 05:01:51 +1000234
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235 /* We were the only map that was found */
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000236 if (found_maps == 1 && map->flags & _DRM_REMOVABLE) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237 /* Check to see if we are in the maplist, if we are not, then
238 * we delete this mappings information.
239 */
240 found_maps = 0;
Dave Airliebd1b3312007-05-26 05:01:51 +1000241 list_for_each_entry(r_list, &dev->maplist, head) {
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000242 if (r_list->map == map)
243 found_maps++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244 }
245
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000246 if (!found_maps) {
Dave Airlie9c8da5e2005-07-10 15:38:56 +1000247 drm_dma_handle_t dmah;
248
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249 switch (map->type) {
250 case _DRM_REGISTERS:
251 case _DRM_FRAME_BUFFER:
252 if (drm_core_has_MTRR(dev) && map->mtrr >= 0) {
253 int retcode;
254 retcode = mtrr_del(map->mtrr,
255 map->offset,
256 map->size);
257 DRM_DEBUG("mtrr_del = %d\n", retcode);
258 }
Christoph Hellwig004a7722007-01-08 21:56:59 +1100259 iounmap(map->handle);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260 break;
261 case _DRM_SHM:
262 vfree(map->handle);
263 break;
264 case _DRM_AGP:
265 case _DRM_SCATTER_GATHER:
266 break;
Dave Airlie2d0f9ea2005-07-10 14:34:13 +1000267 case _DRM_CONSISTENT:
Dave Airlie9c8da5e2005-07-10 15:38:56 +1000268 dmah.vaddr = map->handle;
269 dmah.busaddr = map->offset;
270 dmah.size = map->size;
271 __drm_pci_free(dev, &dmah);
Dave Airlie2d0f9ea2005-07-10 14:34:13 +1000272 break;
Jesse Barnesa2c0a972008-11-05 10:31:53 -0800273 case _DRM_GEM:
274 DRM_ERROR("tried to rmmap GEM object\n");
275 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276 }
Eric Anholt9a298b22009-03-24 12:23:04 -0700277 kfree(map);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278 }
279 }
Dave Airlie30e2fb12006-02-02 19:37:46 +1100280 mutex_unlock(&dev->struct_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281}
282
283/**
Nick Pigginca0b07d2008-02-07 16:20:50 +1000284 * \c fault method for DMA virtual memory.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285 *
286 * \param vma virtual memory area.
287 * \param address access address.
288 * \return pointer to the page structure.
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000289 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290 * Determine the page number from the page offset and get it from drm_device_dma::pagelist.
291 */
Nick Pigginca0b07d2008-02-07 16:20:50 +1000292static int drm_do_vm_dma_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293{
Dave Airlie84b1fd12007-07-11 15:53:27 +1000294 struct drm_file *priv = vma->vm_file->private_data;
Dave Airlie2c14f282008-04-21 16:47:32 +1000295 struct drm_device *dev = priv->minor->dev;
Dave Airliecdd55a22007-07-11 16:32:08 +1000296 struct drm_device_dma *dma = dev->dma;
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000297 unsigned long offset;
298 unsigned long page_nr;
299 struct page *page;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000301 if (!dma)
Nick Pigginca0b07d2008-02-07 16:20:50 +1000302 return VM_FAULT_SIGBUS; /* Error */
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000303 if (!dma->pagelist)
Nick Pigginca0b07d2008-02-07 16:20:50 +1000304 return VM_FAULT_SIGBUS; /* Nothing allocated */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305
Nick Pigginca0b07d2008-02-07 16:20:50 +1000306 offset = (unsigned long)vmf->virtual_address - vma->vm_start; /* vm_[pg]off[set] should be 0 */
307 page_nr = offset >> PAGE_SHIFT; /* page_nr could just be vmf->pgoff */
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000308 page = virt_to_page((dma->pagelist[page_nr] + (offset & (~PAGE_MASK))));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309
310 get_page(page);
Nick Pigginca0b07d2008-02-07 16:20:50 +1000311 vmf->page = page;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312
Nick Pigginca0b07d2008-02-07 16:20:50 +1000313 DRM_DEBUG("dma_fault 0x%lx (page %lu)\n", offset, page_nr);
314 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315}
316
317/**
Nick Pigginca0b07d2008-02-07 16:20:50 +1000318 * \c fault method for scatter-gather virtual memory.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319 *
320 * \param vma virtual memory area.
321 * \param address access address.
322 * \return pointer to the page structure.
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000323 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324 * Determine the map offset from the page offset and get it from drm_sg_mem::pagelist.
325 */
Nick Pigginca0b07d2008-02-07 16:20:50 +1000326static int drm_do_vm_sg_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327{
Benjamin Herrenschmidtf77d3902009-02-02 16:55:46 +1100328 struct drm_local_map *map = vma->vm_private_data;
Dave Airlie84b1fd12007-07-11 15:53:27 +1000329 struct drm_file *priv = vma->vm_file->private_data;
Dave Airlie2c14f282008-04-21 16:47:32 +1000330 struct drm_device *dev = priv->minor->dev;
Dave Airlie55910512007-07-11 16:53:40 +1000331 struct drm_sg_mem *entry = dev->sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332 unsigned long offset;
333 unsigned long map_offset;
334 unsigned long page_offset;
335 struct page *page;
336
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000337 if (!entry)
Nick Pigginca0b07d2008-02-07 16:20:50 +1000338 return VM_FAULT_SIGBUS; /* Error */
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000339 if (!entry->pagelist)
Nick Pigginca0b07d2008-02-07 16:20:50 +1000340 return VM_FAULT_SIGBUS; /* Nothing allocated */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341
Nick Pigginca0b07d2008-02-07 16:20:50 +1000342 offset = (unsigned long)vmf->virtual_address - vma->vm_start;
Dave Airlied1f2b552005-08-05 22:11:22 +1000343 map_offset = map->offset - (unsigned long)dev->sg->virtual;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344 page_offset = (offset >> PAGE_SHIFT) + (map_offset >> PAGE_SHIFT);
345 page = entry->pagelist[page_offset];
346 get_page(page);
Nick Pigginca0b07d2008-02-07 16:20:50 +1000347 vmf->page = page;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348
Nick Pigginca0b07d2008-02-07 16:20:50 +1000349 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350}
351
Nick Pigginca0b07d2008-02-07 16:20:50 +1000352static int drm_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000353{
Nick Pigginca0b07d2008-02-07 16:20:50 +1000354 return drm_do_vm_fault(vma, vmf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355}
356
Nick Pigginca0b07d2008-02-07 16:20:50 +1000357static int drm_vm_shm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000358{
Nick Pigginca0b07d2008-02-07 16:20:50 +1000359 return drm_do_vm_shm_fault(vma, vmf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360}
361
Nick Pigginca0b07d2008-02-07 16:20:50 +1000362static int drm_vm_dma_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000363{
Nick Pigginca0b07d2008-02-07 16:20:50 +1000364 return drm_do_vm_dma_fault(vma, vmf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365}
366
Nick Pigginca0b07d2008-02-07 16:20:50 +1000367static int drm_vm_sg_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000368{
Nick Pigginca0b07d2008-02-07 16:20:50 +1000369 return drm_do_vm_sg_fault(vma, vmf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370}
371
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372/** AGP virtual memory operations */
Alexey Dobriyanf0f37e22009-09-27 22:29:37 +0400373static const struct vm_operations_struct drm_vm_ops = {
Nick Pigginca0b07d2008-02-07 16:20:50 +1000374 .fault = drm_vm_fault,
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000375 .open = drm_vm_open,
376 .close = drm_vm_close,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377};
378
379/** Shared virtual memory operations */
Alexey Dobriyanf0f37e22009-09-27 22:29:37 +0400380static const struct vm_operations_struct drm_vm_shm_ops = {
Nick Pigginca0b07d2008-02-07 16:20:50 +1000381 .fault = drm_vm_shm_fault,
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000382 .open = drm_vm_open,
383 .close = drm_vm_shm_close,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384};
385
386/** DMA virtual memory operations */
Alexey Dobriyanf0f37e22009-09-27 22:29:37 +0400387static const struct vm_operations_struct drm_vm_dma_ops = {
Nick Pigginca0b07d2008-02-07 16:20:50 +1000388 .fault = drm_vm_dma_fault,
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000389 .open = drm_vm_open,
390 .close = drm_vm_close,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391};
392
393/** Scatter-gather virtual memory operations */
Alexey Dobriyanf0f37e22009-09-27 22:29:37 +0400394static const struct vm_operations_struct drm_vm_sg_ops = {
Nick Pigginca0b07d2008-02-07 16:20:50 +1000395 .fault = drm_vm_sg_fault,
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000396 .open = drm_vm_open,
397 .close = drm_vm_close,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398};
399
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400/**
401 * \c open method for shared virtual memory.
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000402 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403 * \param vma virtual memory area.
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000404 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405 * Create a new drm_vma_entry structure as the \p vma private data entry and
406 * add it to drm_device::vmalist.
407 */
Jesse Barnesa2c0a972008-11-05 10:31:53 -0800408void drm_vm_open_locked(struct vm_area_struct *vma)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409{
Dave Airlie84b1fd12007-07-11 15:53:27 +1000410 struct drm_file *priv = vma->vm_file->private_data;
Dave Airlie2c14f282008-04-21 16:47:32 +1000411 struct drm_device *dev = priv->minor->dev;
Dave Airlie8fc2fdf2007-07-11 16:21:47 +1000412 struct drm_vma_entry *vma_entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413
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
Eric Anholt9a298b22009-03-24 12:23:04 -0700418 vma_entry = kmalloc(sizeof(*vma_entry), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419 if (vma_entry) {
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000420 vma_entry->vma = vma;
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000421 vma_entry->pid = current->pid;
Dave Airliebd1b3312007-05-26 05:01:51 +1000422 list_add(&vma_entry->head, &dev->vmalist);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423 }
424}
425
Thomas Hellstromd7d8aac2007-03-24 17:52:49 +1100426static void drm_vm_open(struct vm_area_struct *vma)
427{
Dave Airlie84b1fd12007-07-11 15:53:27 +1000428 struct drm_file *priv = vma->vm_file->private_data;
Dave Airlie2c14f282008-04-21 16:47:32 +1000429 struct drm_device *dev = priv->minor->dev;
Thomas Hellstromd7d8aac2007-03-24 17:52:49 +1100430
431 mutex_lock(&dev->struct_mutex);
432 drm_vm_open_locked(vma);
433 mutex_unlock(&dev->struct_mutex);
434}
435
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436/**
437 * \c close method for all virtual memory types.
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000438 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439 * \param vma virtual memory area.
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000440 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441 * Search the \p vma private data entry in drm_device::vmalist, unlink it, and
442 * free it.
443 */
Dave Airliec94f7022005-07-07 21:03:38 +1000444static void drm_vm_close(struct vm_area_struct *vma)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445{
Dave Airlie84b1fd12007-07-11 15:53:27 +1000446 struct drm_file *priv = vma->vm_file->private_data;
Dave Airlie2c14f282008-04-21 16:47:32 +1000447 struct drm_device *dev = priv->minor->dev;
Dave Airlie8fc2fdf2007-07-11 16:21:47 +1000448 struct drm_vma_entry *pt, *temp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449
450 DRM_DEBUG("0x%08lx,0x%08lx\n",
451 vma->vm_start, vma->vm_end - vma->vm_start);
452 atomic_dec(&dev->vma_count);
453
Dave Airlie30e2fb12006-02-02 19:37:46 +1100454 mutex_lock(&dev->struct_mutex);
Dave Airliebd1b3312007-05-26 05:01:51 +1000455 list_for_each_entry_safe(pt, temp, &dev->vmalist, head) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456 if (pt->vma == vma) {
Dave Airliebd1b3312007-05-26 05:01:51 +1000457 list_del(&pt->head);
Eric Anholt9a298b22009-03-24 12:23:04 -0700458 kfree(pt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459 break;
460 }
461 }
Dave Airlie30e2fb12006-02-02 19:37:46 +1100462 mutex_unlock(&dev->struct_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463}
464
465/**
466 * mmap DMA memory.
467 *
Eric Anholt6c340ea2007-08-25 20:23:09 +1000468 * \param file_priv DRM file private.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469 * \param vma virtual memory area.
470 * \return zero on success or a negative number on failure.
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000471 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472 * Sets the virtual memory area operations structure to vm_dma_ops, the file
473 * pointer, and calls vm_open().
474 */
Dave Airliec94f7022005-07-07 21:03:38 +1000475static int drm_mmap_dma(struct file *filp, struct vm_area_struct *vma)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476{
Dave Airlie84b1fd12007-07-11 15:53:27 +1000477 struct drm_file *priv = filp->private_data;
478 struct drm_device *dev;
Dave Airliecdd55a22007-07-11 16:32:08 +1000479 struct drm_device_dma *dma;
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000480 unsigned long length = vma->vm_end - vma->vm_start;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481
Dave Airlie2c14f282008-04-21 16:47:32 +1000482 dev = priv->minor->dev;
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000483 dma = dev->dma;
Thomas Hellstrom15450852007-02-08 16:14:05 +1100484 DRM_DEBUG("start = 0x%lx, end = 0x%lx, page offset = 0x%lx\n",
485 vma->vm_start, vma->vm_end, vma->vm_pgoff);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000487 /* Length must match exact page count */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488 if (!dma || (length >> PAGE_SHIFT) != dma->page_count) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489 return -EINVAL;
490 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491
George Sapountzis3417f332006-10-24 12:03:04 -0700492 if (!capable(CAP_SYS_ADMIN) &&
493 (dma->flags & _DRM_DMA_USE_PCI_RO)) {
494 vma->vm_flags &= ~(VM_WRITE | VM_MAYWRITE);
495#if defined(__i386__) || defined(__x86_64__)
496 pgprot_val(vma->vm_page_prot) &= ~_PAGE_RW;
497#else
498 /* Ye gads this is ugly. With more thought
499 we could move this up higher and use
500 `protection_map' instead. */
501 vma->vm_page_prot =
502 __pgprot(pte_val
503 (pte_wrprotect
504 (__pte(pgprot_val(vma->vm_page_prot)))));
505#endif
506 }
507
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000508 vma->vm_ops = &drm_vm_dma_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000510 vma->vm_flags |= VM_RESERVED; /* Don't swap */
Nick Piggin2f987352008-02-02 03:08:53 +0100511 vma->vm_flags |= VM_DONTEXPAND;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000513 vma->vm_file = filp; /* Needed for drm_vm_open() */
Thomas Hellstromd7d8aac2007-03-24 17:52:49 +1100514 drm_vm_open_locked(vma);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515 return 0;
516}
517
Daniel Vettercbc60ca2010-08-23 22:53:28 +0200518static resource_size_t drm_core_get_reg_ofs(struct drm_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519{
520#ifdef __alpha__
521 return dev->hose->dense_mem_base - dev->hose->mem_space->start;
522#else
523 return 0;
524#endif
525}
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000526
Linus Torvalds1da177e2005-04-16 15:20:36 -0700527/**
528 * mmap DMA memory.
529 *
Eric Anholt6c340ea2007-08-25 20:23:09 +1000530 * \param file_priv DRM file private.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700531 * \param vma virtual memory area.
532 * \return zero on success or a negative number on failure.
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000533 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534 * If the virtual memory area has no offset associated with it then it's a DMA
535 * area, so calls mmap_dma(). Otherwise searches the map in drm_device::maplist,
536 * checks that the restricted flag is not set, sets the virtual memory operations
537 * according to the mapping type and remaps the pages. Finally sets the file
538 * pointer and calls vm_open().
539 */
Jesse Barnesa2c0a972008-11-05 10:31:53 -0800540int drm_mmap_locked(struct file *filp, struct vm_area_struct *vma)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700541{
Dave Airlie84b1fd12007-07-11 15:53:27 +1000542 struct drm_file *priv = filp->private_data;
Dave Airlie2c14f282008-04-21 16:47:32 +1000543 struct drm_device *dev = priv->minor->dev;
Benjamin Herrenschmidtf77d3902009-02-02 16:55:46 +1100544 struct drm_local_map *map = NULL;
Benjamin Herrenschmidt41c2e752009-02-02 16:55:47 +1100545 resource_size_t offset = 0;
Dave Airliee0be4282007-07-12 10:26:44 +1000546 struct drm_hash_item *hash;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700547
Thomas Hellstrom15450852007-02-08 16:14:05 +1100548 DRM_DEBUG("start = 0x%lx, end = 0x%lx, page offset = 0x%lx\n",
549 vma->vm_start, vma->vm_end, vma->vm_pgoff);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000551 if (!priv->authenticated)
552 return -EACCES;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553
554 /* We check for "dma". On Apple's UniNorth, it's valid to have
555 * the AGP mapped at physical address 0
556 * --BenH.
557 */
Thomas Hellstrom15450852007-02-08 16:14:05 +1100558 if (!vma->vm_pgoff
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559#if __OS_HAS_AGP
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000560 && (!dev->agp
561 || dev->agp->agp_info.device->vendor != PCI_VENDOR_ID_APPLE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700562#endif
563 )
564 return drm_mmap_dma(filp, vma);
565
Thomas Hellstrom15450852007-02-08 16:14:05 +1100566 if (drm_ht_find_item(&dev->map_hash, vma->vm_pgoff, &hash)) {
Thomas Hellstrom8d153f72006-08-07 22:36:47 +1000567 DRM_ERROR("Could not find map\n");
568 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569 }
570
Dave Airlie55910512007-07-11 16:53:40 +1000571 map = drm_hash_entry(hash, struct drm_map_list, hash)->map;
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000572 if (!map || ((map->flags & _DRM_RESTRICTED) && !capable(CAP_SYS_ADMIN)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573 return -EPERM;
574
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000575 /* Check for valid size. */
Dave Airlie54ba2f72007-02-10 12:07:47 +1100576 if (map->size < vma->vm_end - vma->vm_start)
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000577 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578
579 if (!capable(CAP_SYS_ADMIN) && (map->flags & _DRM_READ_ONLY)) {
580 vma->vm_flags &= ~(VM_WRITE | VM_MAYWRITE);
581#if defined(__i386__) || defined(__x86_64__)
582 pgprot_val(vma->vm_page_prot) &= ~_PAGE_RW;
583#else
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000584 /* Ye gads this is ugly. With more thought
585 we could move this up higher and use
586 `protection_map' instead. */
587 vma->vm_page_prot =
588 __pgprot(pte_val
589 (pte_wrprotect
590 (__pte(pgprot_val(vma->vm_page_prot)))));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591#endif
592 }
593
594 switch (map->type) {
Jordan Crouse4b7fb9b2010-05-27 13:40:26 -0600595#if !defined(__arm__)
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000596 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
Nick Pigginca0b07d2008-02-07 16:20:50 +1000601 * pages and mappings in fault()
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000602 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603#if defined(__powerpc__)
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000604 pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605#endif
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000606 vma->vm_ops = &drm_vm_ops;
607 break;
608 }
609 /* fall through to _DRM_FRAME_BUFFER... */
Jordan Crouse4b7fb9b2010-05-27 13:40:26 -0600610#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700611 case _DRM_FRAME_BUFFER:
612 case _DRM_REGISTERS:
Daniel Vettercbc60ca2010-08-23 22:53:28 +0200613 offset = drm_core_get_reg_ofs(dev);
Dave Airlie5cc7f9a2007-02-10 11:53:13 +1100614 vma->vm_flags |= VM_IO; /* not in core dump */
615 vma->vm_page_prot = drm_io_prot(map->type, vma);
Jordan Crouse4b7fb9b2010-05-27 13:40:26 -0600616#if !defined(__arm__)
Dave Airlie9e9c1322007-03-24 17:57:54 +1100617 if (io_remap_pfn_range(vma, vma->vm_start,
618 (map->offset + offset) >> PAGE_SHIFT,
619 vma->vm_end - vma->vm_start,
620 vma->vm_page_prot))
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000621 return -EAGAIN;
Jordan Crouse4b7fb9b2010-05-27 13:40:26 -0600622#else
623 if (remap_pfn_range(vma, vma->vm_start,
624 (map->offset + offset) >> PAGE_SHIFT,
625 vma->vm_end - vma->vm_start,
626 vma->vm_page_prot))
627 return -EAGAIN;
628#endif
629
Linus Torvalds1da177e2005-04-16 15:20:36 -0700630 DRM_DEBUG(" Type = %d; start = 0x%lx, end = 0x%lx,"
Benjamin Herrenschmidt41c2e752009-02-02 16:55:47 +1100631 " offset = 0x%llx\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700632 map->type,
Benjamin Herrenschmidt41c2e752009-02-02 16:55:47 +1100633 vma->vm_start, vma->vm_end, (unsigned long long)(map->offset + offset));
Jordan Crouse4b7fb9b2010-05-27 13:40:26 -0600634
Linus Torvalds1da177e2005-04-16 15:20:36 -0700635 vma->vm_ops = &drm_vm_ops;
636 break;
Dave Airlie2d0f9ea2005-07-10 14:34:13 +1000637 case _DRM_CONSISTENT:
Hugh Dickins38315872007-03-24 17:55:16 +1100638 /* Consistent memory is really like shared memory. But
Nick Pigginca0b07d2008-02-07 16:20:50 +1000639 * it's allocated in a different way, so avoid fault */
Hugh Dickins38315872007-03-24 17:55:16 +1100640 if (remap_pfn_range(vma, vma->vm_start,
641 page_to_pfn(virt_to_page(map->handle)),
642 vma->vm_end - vma->vm_start, vma->vm_page_prot))
643 return -EAGAIN;
Benjamin Herrenschmidt6876b3b2008-03-28 14:23:07 -0700644 vma->vm_page_prot = drm_dma_prot(map->type, vma);
Hugh Dickins38315872007-03-24 17:55:16 +1100645 /* fall through to _DRM_SHM */
646 case _DRM_SHM:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700647 vma->vm_ops = &drm_vm_shm_ops;
648 vma->vm_private_data = (void *)map;
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000649 /* Don't let this area swap. Change when
650 DRM_KERNEL advisory is supported. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651 vma->vm_flags |= VM_RESERVED;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700652 break;
653 case _DRM_SCATTER_GATHER:
654 vma->vm_ops = &drm_vm_sg_ops;
655 vma->vm_private_data = (void *)map;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656 vma->vm_flags |= VM_RESERVED;
Benjamin Herrenschmidt5ff64612008-04-20 10:26:25 +1000657 vma->vm_page_prot = drm_dma_prot(map->type, vma);
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000658 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700659 default:
660 return -EINVAL; /* This should never happen. */
661 }
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000662 vma->vm_flags |= VM_RESERVED; /* Don't swap */
Nick Piggin2f987352008-02-02 03:08:53 +0100663 vma->vm_flags |= VM_DONTEXPAND;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700664
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000665 vma->vm_file = filp; /* Needed for drm_vm_open() */
Thomas Hellstromd7d8aac2007-03-24 17:52:49 +1100666 drm_vm_open_locked(vma);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700667 return 0;
668}
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000669
Thomas Hellstromd7d8aac2007-03-24 17:52:49 +1100670int drm_mmap(struct file *filp, struct vm_area_struct *vma)
671{
Dave Airlie84b1fd12007-07-11 15:53:27 +1000672 struct drm_file *priv = filp->private_data;
Dave Airlie2c14f282008-04-21 16:47:32 +1000673 struct drm_device *dev = priv->minor->dev;
Thomas Hellstromd7d8aac2007-03-24 17:52:49 +1100674 int ret;
675
676 mutex_lock(&dev->struct_mutex);
677 ret = drm_mmap_locked(filp, vma);
678 mutex_unlock(&dev->struct_mutex);
679
680 return ret;
681}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682EXPORT_SYMBOL(drm_mmap);