Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /** |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 2 | * \file drm_vm.c |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * Memory mapping for DRM |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 4 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 Airlie | c94f702 | 2005-07-07 21:03:38 +1000 | [diff] [blame] | 41 | static void drm_vm_open(struct vm_area_struct *vma); |
| 42 | static void drm_vm_close(struct vm_area_struct *vma); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | |
Adrian Bunk | 0bead7c | 2007-03-11 11:41:16 +1100 | [diff] [blame] | 44 | static pgprot_t drm_io_prot(uint32_t map_type, struct vm_area_struct *vma) |
Dave Airlie | 5cc7f9a | 2007-02-10 11:53:13 +1100 | [diff] [blame] | 45 | { |
| 46 | pgprot_t tmp = vm_get_page_prot(vma->vm_flags); |
| 47 | |
| 48 | #if defined(__i386__) || defined(__x86_64__) |
| 49 | if (boot_cpu_data.x86 > 3 && map_type != _DRM_AGP) { |
| 50 | pgprot_val(tmp) |= _PAGE_PCD; |
| 51 | pgprot_val(tmp) &= ~_PAGE_PWT; |
| 52 | } |
| 53 | #elif defined(__powerpc__) |
| 54 | pgprot_val(tmp) |= _PAGE_NO_CACHE; |
| 55 | if (map_type == _DRM_REGISTERS) |
| 56 | pgprot_val(tmp) |= _PAGE_GUARDED; |
| 57 | #endif |
| 58 | #if defined(__ia64__) |
| 59 | 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); |
| 64 | #endif |
| 65 | return tmp; |
| 66 | } |
| 67 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | /** |
| 69 | * \c nopage method for AGP virtual memory. |
| 70 | * |
| 71 | * \param vma virtual memory area. |
| 72 | * \param address access address. |
| 73 | * \return pointer to the page structure. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 74 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | * Find the right map and if it's AGP memory find the real physical page to |
| 76 | * map, get the page, increment the use count and return it. |
| 77 | */ |
| 78 | #if __OS_HAS_AGP |
| 79 | static __inline__ struct page *drm_do_vm_nopage(struct vm_area_struct *vma, |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 80 | unsigned long address) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | { |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 82 | drm_file_t *priv = vma->vm_file->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | drm_device_t *dev = priv->head->dev; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 84 | drm_map_t *map = NULL; |
| 85 | drm_map_list_t *r_list; |
Thomas Hellstrom | 8d153f7 | 2006-08-07 22:36:47 +1000 | [diff] [blame] | 86 | drm_hash_item_t *hash; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | |
| 88 | /* |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 89 | * Find the right map |
| 90 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | if (!drm_core_has_AGP(dev)) |
| 92 | goto vm_nopage_error; |
| 93 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 94 | if (!dev->agp || !dev->agp->cant_use_aperture) |
| 95 | goto vm_nopage_error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | |
Thomas Hellstrom | 1545085 | 2007-02-08 16:14:05 +1100 | [diff] [blame] | 97 | if (drm_ht_find_item(&dev->map_hash, vma->vm_pgoff, &hash)) |
Thomas Hellstrom | 8d153f7 | 2006-08-07 22:36:47 +1000 | [diff] [blame] | 98 | goto vm_nopage_error; |
| 99 | |
| 100 | r_list = drm_hash_entry(hash, drm_map_list_t, hash); |
| 101 | map = r_list->map; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | |
| 103 | if (map && map->type == _DRM_AGP) { |
| 104 | unsigned long offset = address - vma->vm_start; |
Dave Airlie | d1f2b55 | 2005-08-05 22:11:22 +1000 | [diff] [blame] | 105 | unsigned long baddr = map->offset + offset; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | struct drm_agp_mem *agpmem; |
| 107 | struct page *page; |
| 108 | |
| 109 | #ifdef __alpha__ |
| 110 | /* |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 111 | * Adjust to a bus-relative address |
| 112 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | baddr -= dev->hose->mem_space->start; |
| 114 | #endif |
| 115 | |
| 116 | /* |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 117 | * It's AGP memory - find the real physical page to map |
| 118 | */ |
| 119 | for (agpmem = dev->agp->memory; agpmem; agpmem = agpmem->next) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | if (agpmem->bound <= baddr && |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 121 | agpmem->bound + agpmem->pages * PAGE_SIZE > baddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | break; |
| 123 | } |
| 124 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 125 | if (!agpmem) |
| 126 | goto vm_nopage_error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | |
| 128 | /* |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 129 | * Get the page, inc the use count, and return it |
| 130 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | offset = (baddr - agpmem->bound) >> PAGE_SHIFT; |
| 132 | page = virt_to_page(__va(agpmem->memory->memory[offset])); |
| 133 | get_page(page); |
| 134 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 135 | DRM_DEBUG |
| 136 | ("baddr = 0x%lx page = 0x%p, offset = 0x%lx, count=%d\n", |
| 137 | baddr, __va(agpmem->memory->memory[offset]), offset, |
| 138 | page_count(page)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | |
| 140 | return page; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 141 | } |
| 142 | vm_nopage_error: |
| 143 | return NOPAGE_SIGBUS; /* Disallow mremap */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 145 | #else /* __OS_HAS_AGP */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | static __inline__ struct page *drm_do_vm_nopage(struct vm_area_struct *vma, |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 147 | unsigned long address) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | { |
| 149 | return NOPAGE_SIGBUS; |
| 150 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 151 | #endif /* __OS_HAS_AGP */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | |
| 153 | /** |
| 154 | * \c nopage method for shared virtual memory. |
| 155 | * |
| 156 | * \param vma virtual memory area. |
| 157 | * \param address access address. |
| 158 | * \return pointer to the page structure. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 159 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 160 | * Get the the mapping, find the real physical page to map, get the page, and |
| 161 | * return it. |
| 162 | */ |
| 163 | static __inline__ struct page *drm_do_vm_shm_nopage(struct vm_area_struct *vma, |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 164 | unsigned long address) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | { |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 166 | drm_map_t *map = (drm_map_t *) vma->vm_private_data; |
| 167 | unsigned long offset; |
| 168 | unsigned long i; |
| 169 | struct page *page; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 171 | if (address > vma->vm_end) |
| 172 | return NOPAGE_SIGBUS; /* Disallow mremap */ |
| 173 | if (!map) |
Nick Piggin | cd54e7e | 2006-12-06 20:31:53 -0800 | [diff] [blame] | 174 | return NOPAGE_SIGBUS; /* Nothing allocated */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 176 | offset = address - vma->vm_start; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | i = (unsigned long)map->handle + offset; |
Hugh Dickins | 3831587 | 2007-03-24 17:55:16 +1100 | [diff] [blame] | 178 | page = vmalloc_to_page((void *)i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | if (!page) |
Nick Piggin | cd54e7e | 2006-12-06 20:31:53 -0800 | [diff] [blame] | 180 | return NOPAGE_SIGBUS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | get_page(page); |
| 182 | |
| 183 | DRM_DEBUG("shm_nopage 0x%lx\n", address); |
| 184 | return page; |
| 185 | } |
| 186 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | /** |
| 188 | * \c close method for shared virtual memory. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 189 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | * \param vma virtual memory area. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 191 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | * Deletes map information if we are the last |
| 193 | * person to close a mapping and it's not in the global maplist. |
| 194 | */ |
Dave Airlie | c94f702 | 2005-07-07 21:03:38 +1000 | [diff] [blame] | 195 | static void drm_vm_shm_close(struct vm_area_struct *vma) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | { |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 197 | drm_file_t *priv = vma->vm_file->private_data; |
| 198 | drm_device_t *dev = priv->head->dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | drm_vma_entry_t *pt, *prev, *next; |
| 200 | drm_map_t *map; |
| 201 | drm_map_list_t *r_list; |
| 202 | struct list_head *list; |
| 203 | int found_maps = 0; |
| 204 | |
| 205 | DRM_DEBUG("0x%08lx,0x%08lx\n", |
| 206 | vma->vm_start, vma->vm_end - vma->vm_start); |
| 207 | atomic_dec(&dev->vma_count); |
| 208 | |
| 209 | map = vma->vm_private_data; |
| 210 | |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 211 | mutex_lock(&dev->struct_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | for (pt = dev->vmalist, prev = NULL; pt; pt = next) { |
| 213 | next = pt->next; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 214 | if (pt->vma->vm_private_data == map) |
| 215 | found_maps++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 216 | if (pt->vma == vma) { |
| 217 | if (prev) { |
| 218 | prev->next = pt->next; |
| 219 | } else { |
| 220 | dev->vmalist = pt->next; |
| 221 | } |
| 222 | drm_free(pt, sizeof(*pt), DRM_MEM_VMAS); |
| 223 | } else { |
| 224 | prev = pt; |
| 225 | } |
| 226 | } |
| 227 | /* We were the only map that was found */ |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 228 | if (found_maps == 1 && map->flags & _DRM_REMOVABLE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | /* Check to see if we are in the maplist, if we are not, then |
| 230 | * we delete this mappings information. |
| 231 | */ |
| 232 | found_maps = 0; |
| 233 | list = &dev->maplist->head; |
| 234 | list_for_each(list, &dev->maplist->head) { |
| 235 | r_list = list_entry(list, drm_map_list_t, head); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 236 | if (r_list->map == map) |
| 237 | found_maps++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | } |
| 239 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 240 | if (!found_maps) { |
Dave Airlie | 9c8da5e | 2005-07-10 15:38:56 +1000 | [diff] [blame] | 241 | drm_dma_handle_t dmah; |
| 242 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | switch (map->type) { |
| 244 | case _DRM_REGISTERS: |
| 245 | case _DRM_FRAME_BUFFER: |
| 246 | if (drm_core_has_MTRR(dev) && map->mtrr >= 0) { |
| 247 | int retcode; |
| 248 | retcode = mtrr_del(map->mtrr, |
| 249 | map->offset, |
| 250 | map->size); |
| 251 | DRM_DEBUG("mtrr_del = %d\n", retcode); |
| 252 | } |
Christoph Hellwig | 004a772 | 2007-01-08 21:56:59 +1100 | [diff] [blame] | 253 | iounmap(map->handle); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | break; |
| 255 | case _DRM_SHM: |
| 256 | vfree(map->handle); |
| 257 | break; |
| 258 | case _DRM_AGP: |
| 259 | case _DRM_SCATTER_GATHER: |
| 260 | break; |
Dave Airlie | 2d0f9ea | 2005-07-10 14:34:13 +1000 | [diff] [blame] | 261 | case _DRM_CONSISTENT: |
Dave Airlie | 9c8da5e | 2005-07-10 15:38:56 +1000 | [diff] [blame] | 262 | dmah.vaddr = map->handle; |
| 263 | dmah.busaddr = map->offset; |
| 264 | dmah.size = map->size; |
| 265 | __drm_pci_free(dev, &dmah); |
Dave Airlie | 2d0f9ea | 2005-07-10 14:34:13 +1000 | [diff] [blame] | 266 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | } |
| 268 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
| 269 | } |
| 270 | } |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 271 | mutex_unlock(&dev->struct_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | } |
| 273 | |
| 274 | /** |
| 275 | * \c nopage method for DMA virtual memory. |
| 276 | * |
| 277 | * \param vma virtual memory area. |
| 278 | * \param address access address. |
| 279 | * \return pointer to the page structure. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 280 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | * Determine the page number from the page offset and get it from drm_device_dma::pagelist. |
| 282 | */ |
| 283 | static __inline__ struct page *drm_do_vm_dma_nopage(struct vm_area_struct *vma, |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 284 | unsigned long address) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | { |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 286 | drm_file_t *priv = vma->vm_file->private_data; |
| 287 | drm_device_t *dev = priv->head->dev; |
| 288 | drm_device_dma_t *dma = dev->dma; |
| 289 | unsigned long offset; |
| 290 | unsigned long page_nr; |
| 291 | struct page *page; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 293 | if (!dma) |
| 294 | return NOPAGE_SIGBUS; /* Error */ |
| 295 | if (address > vma->vm_end) |
| 296 | return NOPAGE_SIGBUS; /* Disallow mremap */ |
| 297 | if (!dma->pagelist) |
Nick Piggin | cd54e7e | 2006-12-06 20:31:53 -0800 | [diff] [blame] | 298 | return NOPAGE_SIGBUS; /* Nothing allocated */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 300 | offset = address - vma->vm_start; /* vm_[pg]off[set] should be 0 */ |
| 301 | page_nr = offset >> PAGE_SHIFT; |
| 302 | page = virt_to_page((dma->pagelist[page_nr] + (offset & (~PAGE_MASK)))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | |
| 304 | get_page(page); |
| 305 | |
| 306 | DRM_DEBUG("dma_nopage 0x%lx (page %lu)\n", address, page_nr); |
| 307 | return page; |
| 308 | } |
| 309 | |
| 310 | /** |
| 311 | * \c nopage method for scatter-gather virtual memory. |
| 312 | * |
| 313 | * \param vma virtual memory area. |
| 314 | * \param address access address. |
| 315 | * \return pointer to the page structure. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 316 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 317 | * Determine the map offset from the page offset and get it from drm_sg_mem::pagelist. |
| 318 | */ |
| 319 | static __inline__ struct page *drm_do_vm_sg_nopage(struct vm_area_struct *vma, |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 320 | unsigned long address) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 321 | { |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 322 | drm_map_t *map = (drm_map_t *) vma->vm_private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | drm_file_t *priv = vma->vm_file->private_data; |
| 324 | drm_device_t *dev = priv->head->dev; |
| 325 | drm_sg_mem_t *entry = dev->sg; |
| 326 | unsigned long offset; |
| 327 | unsigned long map_offset; |
| 328 | unsigned long page_offset; |
| 329 | struct page *page; |
| 330 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 331 | if (!entry) |
| 332 | return NOPAGE_SIGBUS; /* Error */ |
| 333 | if (address > vma->vm_end) |
| 334 | return NOPAGE_SIGBUS; /* Disallow mremap */ |
| 335 | if (!entry->pagelist) |
Nick Piggin | cd54e7e | 2006-12-06 20:31:53 -0800 | [diff] [blame] | 336 | return NOPAGE_SIGBUS; /* Nothing allocated */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | |
| 338 | offset = address - vma->vm_start; |
Dave Airlie | d1f2b55 | 2005-08-05 22:11:22 +1000 | [diff] [blame] | 339 | map_offset = map->offset - (unsigned long)dev->sg->virtual; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | page_offset = (offset >> PAGE_SHIFT) + (map_offset >> PAGE_SHIFT); |
| 341 | page = entry->pagelist[page_offset]; |
| 342 | get_page(page); |
| 343 | |
| 344 | return page; |
| 345 | } |
| 346 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | static struct page *drm_vm_nopage(struct vm_area_struct *vma, |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 348 | unsigned long address, int *type) |
| 349 | { |
| 350 | if (type) |
| 351 | *type = VM_FAULT_MINOR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | return drm_do_vm_nopage(vma, address); |
| 353 | } |
| 354 | |
| 355 | static struct page *drm_vm_shm_nopage(struct vm_area_struct *vma, |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 356 | unsigned long address, int *type) |
| 357 | { |
| 358 | if (type) |
| 359 | *type = VM_FAULT_MINOR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | return drm_do_vm_shm_nopage(vma, address); |
| 361 | } |
| 362 | |
| 363 | static struct page *drm_vm_dma_nopage(struct vm_area_struct *vma, |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 364 | unsigned long address, int *type) |
| 365 | { |
| 366 | if (type) |
| 367 | *type = VM_FAULT_MINOR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | return drm_do_vm_dma_nopage(vma, address); |
| 369 | } |
| 370 | |
| 371 | static struct page *drm_vm_sg_nopage(struct vm_area_struct *vma, |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 372 | unsigned long address, int *type) |
| 373 | { |
| 374 | if (type) |
| 375 | *type = VM_FAULT_MINOR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | return drm_do_vm_sg_nopage(vma, address); |
| 377 | } |
| 378 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | /** AGP virtual memory operations */ |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 380 | static struct vm_operations_struct drm_vm_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 381 | .nopage = drm_vm_nopage, |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 382 | .open = drm_vm_open, |
| 383 | .close = drm_vm_close, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | }; |
| 385 | |
| 386 | /** Shared virtual memory operations */ |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 387 | static struct vm_operations_struct drm_vm_shm_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | .nopage = drm_vm_shm_nopage, |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 389 | .open = drm_vm_open, |
| 390 | .close = drm_vm_shm_close, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 391 | }; |
| 392 | |
| 393 | /** DMA virtual memory operations */ |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 394 | static struct vm_operations_struct drm_vm_dma_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | .nopage = drm_vm_dma_nopage, |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 396 | .open = drm_vm_open, |
| 397 | .close = drm_vm_close, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | }; |
| 399 | |
| 400 | /** Scatter-gather virtual memory operations */ |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 401 | static struct vm_operations_struct drm_vm_sg_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | .nopage = drm_vm_sg_nopage, |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 403 | .open = drm_vm_open, |
| 404 | .close = drm_vm_close, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | }; |
| 406 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | /** |
| 408 | * \c open method for shared virtual memory. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 409 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | * \param vma virtual memory area. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 411 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 412 | * Create a new drm_vma_entry structure as the \p vma private data entry and |
| 413 | * add it to drm_device::vmalist. |
| 414 | */ |
Thomas Hellstrom | d7d8aac | 2007-03-24 17:52:49 +1100 | [diff] [blame] | 415 | static void drm_vm_open_locked(struct vm_area_struct *vma) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 416 | { |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 417 | drm_file_t *priv = vma->vm_file->private_data; |
| 418 | drm_device_t *dev = priv->head->dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | drm_vma_entry_t *vma_entry; |
| 420 | |
| 421 | DRM_DEBUG("0x%08lx,0x%08lx\n", |
| 422 | vma->vm_start, vma->vm_end - vma->vm_start); |
| 423 | atomic_inc(&dev->vma_count); |
| 424 | |
| 425 | vma_entry = drm_alloc(sizeof(*vma_entry), DRM_MEM_VMAS); |
| 426 | if (vma_entry) { |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 427 | vma_entry->vma = vma; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | vma_entry->next = dev->vmalist; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 429 | vma_entry->pid = current->pid; |
| 430 | dev->vmalist = vma_entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | } |
| 432 | } |
| 433 | |
Thomas Hellstrom | d7d8aac | 2007-03-24 17:52:49 +1100 | [diff] [blame] | 434 | static void drm_vm_open(struct vm_area_struct *vma) |
| 435 | { |
| 436 | drm_file_t *priv = vma->vm_file->private_data; |
| 437 | drm_device_t *dev = priv->head->dev; |
| 438 | |
| 439 | mutex_lock(&dev->struct_mutex); |
| 440 | drm_vm_open_locked(vma); |
| 441 | mutex_unlock(&dev->struct_mutex); |
| 442 | } |
| 443 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 444 | /** |
| 445 | * \c close method for all virtual memory types. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 446 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 447 | * \param vma virtual memory area. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 448 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | * Search the \p vma private data entry in drm_device::vmalist, unlink it, and |
| 450 | * free it. |
| 451 | */ |
Dave Airlie | c94f702 | 2005-07-07 21:03:38 +1000 | [diff] [blame] | 452 | static void drm_vm_close(struct vm_area_struct *vma) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | { |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 454 | drm_file_t *priv = vma->vm_file->private_data; |
| 455 | drm_device_t *dev = priv->head->dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | drm_vma_entry_t *pt, *prev; |
| 457 | |
| 458 | DRM_DEBUG("0x%08lx,0x%08lx\n", |
| 459 | vma->vm_start, vma->vm_end - vma->vm_start); |
| 460 | atomic_dec(&dev->vma_count); |
| 461 | |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 462 | mutex_lock(&dev->struct_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | for (pt = dev->vmalist, prev = NULL; pt; prev = pt, pt = pt->next) { |
| 464 | if (pt->vma == vma) { |
| 465 | if (prev) { |
| 466 | prev->next = pt->next; |
| 467 | } else { |
| 468 | dev->vmalist = pt->next; |
| 469 | } |
| 470 | drm_free(pt, sizeof(*pt), DRM_MEM_VMAS); |
| 471 | break; |
| 472 | } |
| 473 | } |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 474 | mutex_unlock(&dev->struct_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 475 | } |
| 476 | |
| 477 | /** |
| 478 | * mmap DMA memory. |
| 479 | * |
| 480 | * \param filp file pointer. |
| 481 | * \param vma virtual memory area. |
| 482 | * \return zero on success or a negative number on failure. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 483 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 484 | * Sets the virtual memory area operations structure to vm_dma_ops, the file |
| 485 | * pointer, and calls vm_open(). |
| 486 | */ |
Dave Airlie | c94f702 | 2005-07-07 21:03:38 +1000 | [diff] [blame] | 487 | static int drm_mmap_dma(struct file *filp, struct vm_area_struct *vma) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | { |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 489 | drm_file_t *priv = filp->private_data; |
| 490 | drm_device_t *dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 491 | drm_device_dma_t *dma; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 492 | unsigned long length = vma->vm_end - vma->vm_start; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 493 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 494 | dev = priv->head->dev; |
| 495 | dma = dev->dma; |
Thomas Hellstrom | 1545085 | 2007-02-08 16:14:05 +1100 | [diff] [blame] | 496 | DRM_DEBUG("start = 0x%lx, end = 0x%lx, page offset = 0x%lx\n", |
| 497 | vma->vm_start, vma->vm_end, vma->vm_pgoff); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 499 | /* Length must match exact page count */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 500 | if (!dma || (length >> PAGE_SHIFT) != dma->page_count) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | return -EINVAL; |
| 502 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | |
George Sapountzis | 3417f33 | 2006-10-24 12:03:04 -0700 | [diff] [blame] | 504 | if (!capable(CAP_SYS_ADMIN) && |
| 505 | (dma->flags & _DRM_DMA_USE_PCI_RO)) { |
| 506 | vma->vm_flags &= ~(VM_WRITE | VM_MAYWRITE); |
| 507 | #if defined(__i386__) || defined(__x86_64__) |
| 508 | pgprot_val(vma->vm_page_prot) &= ~_PAGE_RW; |
| 509 | #else |
| 510 | /* Ye gads this is ugly. With more thought |
| 511 | we could move this up higher and use |
| 512 | `protection_map' instead. */ |
| 513 | vma->vm_page_prot = |
| 514 | __pgprot(pte_val |
| 515 | (pte_wrprotect |
| 516 | (__pte(pgprot_val(vma->vm_page_prot))))); |
| 517 | #endif |
| 518 | } |
| 519 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 520 | vma->vm_ops = &drm_vm_dma_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 521 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 522 | vma->vm_flags |= VM_RESERVED; /* Don't swap */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 523 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 524 | vma->vm_file = filp; /* Needed for drm_vm_open() */ |
Thomas Hellstrom | d7d8aac | 2007-03-24 17:52:49 +1100 | [diff] [blame] | 525 | drm_vm_open_locked(vma); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | return 0; |
| 527 | } |
| 528 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 529 | unsigned long drm_core_get_map_ofs(drm_map_t * map) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | { |
| 531 | return map->offset; |
| 532 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 533 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | EXPORT_SYMBOL(drm_core_get_map_ofs); |
| 535 | |
| 536 | unsigned long drm_core_get_reg_ofs(struct drm_device *dev) |
| 537 | { |
| 538 | #ifdef __alpha__ |
| 539 | return dev->hose->dense_mem_base - dev->hose->mem_space->start; |
| 540 | #else |
| 541 | return 0; |
| 542 | #endif |
| 543 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 544 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 545 | EXPORT_SYMBOL(drm_core_get_reg_ofs); |
| 546 | |
| 547 | /** |
| 548 | * mmap DMA memory. |
| 549 | * |
| 550 | * \param filp file pointer. |
| 551 | * \param vma virtual memory area. |
| 552 | * \return zero on success or a negative number on failure. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 553 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | * If the virtual memory area has no offset associated with it then it's a DMA |
| 555 | * area, so calls mmap_dma(). Otherwise searches the map in drm_device::maplist, |
| 556 | * checks that the restricted flag is not set, sets the virtual memory operations |
| 557 | * according to the mapping type and remaps the pages. Finally sets the file |
| 558 | * pointer and calls vm_open(). |
| 559 | */ |
Thomas Hellstrom | d7d8aac | 2007-03-24 17:52:49 +1100 | [diff] [blame] | 560 | static int drm_mmap_locked(struct file *filp, struct vm_area_struct *vma) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | { |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 562 | drm_file_t *priv = filp->private_data; |
| 563 | drm_device_t *dev = priv->head->dev; |
| 564 | drm_map_t *map = NULL; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 565 | unsigned long offset = 0; |
Thomas Hellstrom | 8d153f7 | 2006-08-07 22:36:47 +1000 | [diff] [blame] | 566 | drm_hash_item_t *hash; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 567 | |
Thomas Hellstrom | 1545085 | 2007-02-08 16:14:05 +1100 | [diff] [blame] | 568 | DRM_DEBUG("start = 0x%lx, end = 0x%lx, page offset = 0x%lx\n", |
| 569 | vma->vm_start, vma->vm_end, vma->vm_pgoff); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 571 | if (!priv->authenticated) |
| 572 | return -EACCES; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 573 | |
| 574 | /* We check for "dma". On Apple's UniNorth, it's valid to have |
| 575 | * the AGP mapped at physical address 0 |
| 576 | * --BenH. |
| 577 | */ |
Thomas Hellstrom | 1545085 | 2007-02-08 16:14:05 +1100 | [diff] [blame] | 578 | if (!vma->vm_pgoff |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 579 | #if __OS_HAS_AGP |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 580 | && (!dev->agp |
| 581 | || dev->agp->agp_info.device->vendor != PCI_VENDOR_ID_APPLE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | #endif |
| 583 | ) |
| 584 | return drm_mmap_dma(filp, vma); |
| 585 | |
Thomas Hellstrom | 1545085 | 2007-02-08 16:14:05 +1100 | [diff] [blame] | 586 | if (drm_ht_find_item(&dev->map_hash, vma->vm_pgoff, &hash)) { |
Thomas Hellstrom | 8d153f7 | 2006-08-07 22:36:47 +1000 | [diff] [blame] | 587 | DRM_ERROR("Could not find map\n"); |
| 588 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | } |
| 590 | |
Thomas Hellstrom | 8d153f7 | 2006-08-07 22:36:47 +1000 | [diff] [blame] | 591 | map = drm_hash_entry(hash, drm_map_list_t, hash)->map; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 592 | if (!map || ((map->flags & _DRM_RESTRICTED) && !capable(CAP_SYS_ADMIN))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | return -EPERM; |
| 594 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 595 | /* Check for valid size. */ |
Dave Airlie | 54ba2f7 | 2007-02-10 12:07:47 +1100 | [diff] [blame] | 596 | if (map->size < vma->vm_end - vma->vm_start) |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 597 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | |
| 599 | if (!capable(CAP_SYS_ADMIN) && (map->flags & _DRM_READ_ONLY)) { |
| 600 | vma->vm_flags &= ~(VM_WRITE | VM_MAYWRITE); |
| 601 | #if defined(__i386__) || defined(__x86_64__) |
| 602 | pgprot_val(vma->vm_page_prot) &= ~_PAGE_RW; |
| 603 | #else |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 604 | /* Ye gads this is ugly. With more thought |
| 605 | we could move this up higher and use |
| 606 | `protection_map' instead. */ |
| 607 | vma->vm_page_prot = |
| 608 | __pgprot(pte_val |
| 609 | (pte_wrprotect |
| 610 | (__pte(pgprot_val(vma->vm_page_prot))))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 611 | #endif |
| 612 | } |
| 613 | |
| 614 | switch (map->type) { |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 615 | case _DRM_AGP: |
| 616 | if (drm_core_has_AGP(dev) && dev->agp->cant_use_aperture) { |
| 617 | /* |
| 618 | * On some platforms we can't talk to bus dma address from the CPU, so for |
| 619 | * memory of type DRM_AGP, we'll deal with sorting out the real physical |
| 620 | * pages and mappings in nopage() |
| 621 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 622 | #if defined(__powerpc__) |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 623 | pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 624 | #endif |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 625 | vma->vm_ops = &drm_vm_ops; |
| 626 | break; |
| 627 | } |
| 628 | /* fall through to _DRM_FRAME_BUFFER... */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 629 | case _DRM_FRAME_BUFFER: |
| 630 | case _DRM_REGISTERS: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 631 | offset = dev->driver->get_reg_ofs(dev); |
Dave Airlie | 5cc7f9a | 2007-02-10 11:53:13 +1100 | [diff] [blame] | 632 | vma->vm_flags |= VM_IO; /* not in core dump */ |
| 633 | vma->vm_page_prot = drm_io_prot(map->type, vma); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 634 | #ifdef __sparc__ |
David S. Miller | 14778d9 | 2006-03-21 02:29:39 -0800 | [diff] [blame] | 635 | vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 636 | #endif |
Dave Airlie | 9e9c132 | 2007-03-24 17:57:54 +1100 | [diff] [blame^] | 637 | if (io_remap_pfn_range(vma, vma->vm_start, |
| 638 | (map->offset + offset) >> PAGE_SHIFT, |
| 639 | vma->vm_end - vma->vm_start, |
| 640 | vma->vm_page_prot)) |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 641 | return -EAGAIN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 642 | DRM_DEBUG(" Type = %d; start = 0x%lx, end = 0x%lx," |
| 643 | " offset = 0x%lx\n", |
| 644 | map->type, |
Dave Airlie | d1f2b55 | 2005-08-05 22:11:22 +1000 | [diff] [blame] | 645 | vma->vm_start, vma->vm_end, map->offset + offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 646 | vma->vm_ops = &drm_vm_ops; |
| 647 | break; |
Dave Airlie | 2d0f9ea | 2005-07-10 14:34:13 +1000 | [diff] [blame] | 648 | case _DRM_CONSISTENT: |
Hugh Dickins | 3831587 | 2007-03-24 17:55:16 +1100 | [diff] [blame] | 649 | /* Consistent memory is really like shared memory. But |
| 650 | * it's allocated in a different way, so avoid nopage */ |
| 651 | if (remap_pfn_range(vma, vma->vm_start, |
| 652 | page_to_pfn(virt_to_page(map->handle)), |
| 653 | vma->vm_end - vma->vm_start, vma->vm_page_prot)) |
| 654 | return -EAGAIN; |
| 655 | /* fall through to _DRM_SHM */ |
| 656 | case _DRM_SHM: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 657 | vma->vm_ops = &drm_vm_shm_ops; |
| 658 | vma->vm_private_data = (void *)map; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 659 | /* Don't let this area swap. Change when |
| 660 | DRM_KERNEL advisory is supported. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 661 | vma->vm_flags |= VM_RESERVED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 662 | break; |
| 663 | case _DRM_SCATTER_GATHER: |
| 664 | vma->vm_ops = &drm_vm_sg_ops; |
| 665 | vma->vm_private_data = (void *)map; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 666 | vma->vm_flags |= VM_RESERVED; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 667 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 668 | default: |
| 669 | return -EINVAL; /* This should never happen. */ |
| 670 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 671 | vma->vm_flags |= VM_RESERVED; /* Don't swap */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 672 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 673 | vma->vm_file = filp; /* Needed for drm_vm_open() */ |
Thomas Hellstrom | d7d8aac | 2007-03-24 17:52:49 +1100 | [diff] [blame] | 674 | drm_vm_open_locked(vma); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | return 0; |
| 676 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 677 | |
Thomas Hellstrom | d7d8aac | 2007-03-24 17:52:49 +1100 | [diff] [blame] | 678 | int drm_mmap(struct file *filp, struct vm_area_struct *vma) |
| 679 | { |
| 680 | drm_file_t *priv = filp->private_data; |
| 681 | drm_device_t *dev = priv->head->dev; |
| 682 | int ret; |
| 683 | |
| 684 | mutex_lock(&dev->struct_mutex); |
| 685 | ret = drm_mmap_locked(filp, vma); |
| 686 | mutex_unlock(&dev->struct_mutex); |
| 687 | |
| 688 | return ret; |
| 689 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 690 | EXPORT_SYMBOL(drm_mmap); |