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; |
Benjamin Herrenschmidt | 6876b3b | 2008-03-28 14:23:07 -0700 | [diff] [blame] | 57 | #elif defined(__ia64__) |
Dave Airlie | 5cc7f9a | 2007-02-10 11:53:13 +1100 | [diff] [blame] | 58 | if (efi_range_is_wc(vma->vm_start, vma->vm_end - |
| 59 | vma->vm_start)) |
| 60 | tmp = pgprot_writecombine(tmp); |
| 61 | else |
| 62 | tmp = pgprot_noncached(tmp); |
Benjamin Herrenschmidt | 6876b3b | 2008-03-28 14:23:07 -0700 | [diff] [blame] | 63 | #elif defined(__sparc__) |
| 64 | tmp = pgprot_noncached(tmp); |
| 65 | #endif |
| 66 | return tmp; |
| 67 | } |
| 68 | |
| 69 | static pgprot_t drm_dma_prot(uint32_t map_type, struct vm_area_struct *vma) |
| 70 | { |
| 71 | pgprot_t tmp = vm_get_page_prot(vma->vm_flags); |
| 72 | |
| 73 | #if defined(__powerpc__) && defined(CONFIG_NOT_COHERENT_CACHE) |
| 74 | tmp |= _PAGE_NO_CACHE; |
Dave Airlie | 5cc7f9a | 2007-02-10 11:53:13 +1100 | [diff] [blame] | 75 | #endif |
| 76 | return tmp; |
| 77 | } |
| 78 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | /** |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 80 | * \c fault method for AGP virtual memory. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | * |
| 82 | * \param vma virtual memory area. |
| 83 | * \param address access address. |
| 84 | * \return pointer to the page structure. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 85 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | * Find the right map and if it's AGP memory find the real physical page to |
| 87 | * map, get the page, increment the use count and return it. |
| 88 | */ |
| 89 | #if __OS_HAS_AGP |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 90 | static int drm_do_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | { |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 92 | struct drm_file *priv = vma->vm_file->private_data; |
| 93 | struct drm_device *dev = priv->head->dev; |
Dave Airlie | c60ce62 | 2007-07-11 15:27:12 +1000 | [diff] [blame] | 94 | struct drm_map *map = NULL; |
Dave Airlie | 5591051 | 2007-07-11 16:53:40 +1000 | [diff] [blame] | 95 | struct drm_map_list *r_list; |
Dave Airlie | e0be428 | 2007-07-12 10:26:44 +1000 | [diff] [blame] | 96 | struct drm_hash_item *hash; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | |
| 98 | /* |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 99 | * Find the right map |
| 100 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | if (!drm_core_has_AGP(dev)) |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 102 | goto vm_fault_error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 104 | if (!dev->agp || !dev->agp->cant_use_aperture) |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 105 | goto vm_fault_error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | |
Thomas Hellstrom | 1545085 | 2007-02-08 16:14:05 +1100 | [diff] [blame] | 107 | if (drm_ht_find_item(&dev->map_hash, vma->vm_pgoff, &hash)) |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 108 | goto vm_fault_error; |
Thomas Hellstrom | 8d153f7 | 2006-08-07 22:36:47 +1000 | [diff] [blame] | 109 | |
Dave Airlie | 5591051 | 2007-07-11 16:53:40 +1000 | [diff] [blame] | 110 | r_list = drm_hash_entry(hash, struct drm_map_list, hash); |
Thomas Hellstrom | 8d153f7 | 2006-08-07 22:36:47 +1000 | [diff] [blame] | 111 | map = r_list->map; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | |
| 113 | if (map && map->type == _DRM_AGP) { |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 114 | /* |
| 115 | * Using vm_pgoff as a selector forces us to use this unusual |
| 116 | * addressing scheme. |
| 117 | */ |
| 118 | unsigned long offset = (unsigned long)vmf->virtual_address - |
| 119 | vma->vm_start; |
Dave Airlie | d1f2b55 | 2005-08-05 22:11:22 +1000 | [diff] [blame] | 120 | unsigned long baddr = map->offset + offset; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | struct drm_agp_mem *agpmem; |
| 122 | struct page *page; |
| 123 | |
| 124 | #ifdef __alpha__ |
| 125 | /* |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 126 | * Adjust to a bus-relative address |
| 127 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | baddr -= dev->hose->mem_space->start; |
| 129 | #endif |
| 130 | |
| 131 | /* |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 132 | * It's AGP memory - find the real physical page to map |
| 133 | */ |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 134 | list_for_each_entry(agpmem, &dev->agp->memory, head) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | if (agpmem->bound <= baddr && |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 136 | agpmem->bound + agpmem->pages * PAGE_SIZE > baddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | break; |
| 138 | } |
| 139 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 140 | if (!agpmem) |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 141 | goto vm_fault_error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | |
| 143 | /* |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 144 | * Get the page, inc the use count, and return it |
| 145 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | offset = (baddr - agpmem->bound) >> PAGE_SHIFT; |
| 147 | page = virt_to_page(__va(agpmem->memory->memory[offset])); |
| 148 | get_page(page); |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 149 | vmf->page = page; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 151 | DRM_DEBUG |
| 152 | ("baddr = 0x%lx page = 0x%p, offset = 0x%lx, count=%d\n", |
| 153 | baddr, __va(agpmem->memory->memory[offset]), offset, |
| 154 | page_count(page)); |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 155 | return 0; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 156 | } |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 157 | vm_fault_error: |
| 158 | return VM_FAULT_SIGBUS; /* Disallow mremap */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 160 | #else /* __OS_HAS_AGP */ |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 161 | static int drm_do_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | { |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 163 | return VM_FAULT_SIGBUS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 165 | #endif /* __OS_HAS_AGP */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | |
| 167 | /** |
| 168 | * \c nopage method for shared virtual memory. |
| 169 | * |
| 170 | * \param vma virtual memory area. |
| 171 | * \param address access address. |
| 172 | * \return pointer to the page structure. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 173 | * |
Michael Opdenacker | 59c5159 | 2007-05-09 08:57:56 +0200 | [diff] [blame] | 174 | * Get the mapping, find the real physical page to map, get the page, and |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | * return it. |
| 176 | */ |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 177 | static int drm_do_vm_shm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | { |
Dave Airlie | c60ce62 | 2007-07-11 15:27:12 +1000 | [diff] [blame] | 179 | struct drm_map *map = (struct drm_map *) vma->vm_private_data; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 180 | unsigned long offset; |
| 181 | unsigned long i; |
| 182 | struct page *page; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 184 | if (!map) |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 185 | return VM_FAULT_SIGBUS; /* Nothing allocated */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 187 | offset = (unsigned long)vmf->virtual_address - vma->vm_start; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | i = (unsigned long)map->handle + offset; |
Hugh Dickins | 3831587 | 2007-03-24 17:55:16 +1100 | [diff] [blame] | 189 | page = vmalloc_to_page((void *)i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | if (!page) |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 191 | return VM_FAULT_SIGBUS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | get_page(page); |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 193 | vmf->page = page; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 195 | DRM_DEBUG("shm_fault 0x%lx\n", offset); |
| 196 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | } |
| 198 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | /** |
| 200 | * \c close method for shared virtual memory. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 201 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | * \param vma virtual memory area. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 203 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | * Deletes map information if we are the last |
| 205 | * person to close a mapping and it's not in the global maplist. |
| 206 | */ |
Dave Airlie | c94f702 | 2005-07-07 21:03:38 +1000 | [diff] [blame] | 207 | static void drm_vm_shm_close(struct vm_area_struct *vma) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | { |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 209 | struct drm_file *priv = vma->vm_file->private_data; |
| 210 | struct drm_device *dev = priv->head->dev; |
Dave Airlie | 8fc2fdf | 2007-07-11 16:21:47 +1000 | [diff] [blame] | 211 | struct drm_vma_entry *pt, *temp; |
Dave Airlie | c60ce62 | 2007-07-11 15:27:12 +1000 | [diff] [blame] | 212 | struct drm_map *map; |
Dave Airlie | 5591051 | 2007-07-11 16:53:40 +1000 | [diff] [blame] | 213 | struct drm_map_list *r_list; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | int found_maps = 0; |
| 215 | |
| 216 | DRM_DEBUG("0x%08lx,0x%08lx\n", |
| 217 | vma->vm_start, vma->vm_end - vma->vm_start); |
| 218 | atomic_dec(&dev->vma_count); |
| 219 | |
| 220 | map = vma->vm_private_data; |
| 221 | |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 222 | mutex_lock(&dev->struct_mutex); |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 223 | list_for_each_entry_safe(pt, temp, &dev->vmalist, head) { |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 224 | if (pt->vma->vm_private_data == map) |
| 225 | found_maps++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | if (pt->vma == vma) { |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 227 | list_del(&pt->head); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | drm_free(pt, sizeof(*pt), DRM_MEM_VMAS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | } |
| 230 | } |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 231 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | /* We were the only map that was found */ |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 233 | if (found_maps == 1 && map->flags & _DRM_REMOVABLE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | /* Check to see if we are in the maplist, if we are not, then |
| 235 | * we delete this mappings information. |
| 236 | */ |
| 237 | found_maps = 0; |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 238 | list_for_each_entry(r_list, &dev->maplist, head) { |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 239 | if (r_list->map == map) |
| 240 | found_maps++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | } |
| 242 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 243 | if (!found_maps) { |
Dave Airlie | 9c8da5e | 2005-07-10 15:38:56 +1000 | [diff] [blame] | 244 | drm_dma_handle_t dmah; |
| 245 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | switch (map->type) { |
| 247 | case _DRM_REGISTERS: |
| 248 | case _DRM_FRAME_BUFFER: |
| 249 | if (drm_core_has_MTRR(dev) && map->mtrr >= 0) { |
| 250 | int retcode; |
| 251 | retcode = mtrr_del(map->mtrr, |
| 252 | map->offset, |
| 253 | map->size); |
| 254 | DRM_DEBUG("mtrr_del = %d\n", retcode); |
| 255 | } |
Christoph Hellwig | 004a772 | 2007-01-08 21:56:59 +1100 | [diff] [blame] | 256 | iounmap(map->handle); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | break; |
| 258 | case _DRM_SHM: |
| 259 | vfree(map->handle); |
| 260 | break; |
| 261 | case _DRM_AGP: |
| 262 | case _DRM_SCATTER_GATHER: |
| 263 | break; |
Dave Airlie | 2d0f9ea | 2005-07-10 14:34:13 +1000 | [diff] [blame] | 264 | case _DRM_CONSISTENT: |
Dave Airlie | 9c8da5e | 2005-07-10 15:38:56 +1000 | [diff] [blame] | 265 | dmah.vaddr = map->handle; |
| 266 | dmah.busaddr = map->offset; |
| 267 | dmah.size = map->size; |
| 268 | __drm_pci_free(dev, &dmah); |
Dave Airlie | 2d0f9ea | 2005-07-10 14:34:13 +1000 | [diff] [blame] | 269 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | } |
| 271 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
| 272 | } |
| 273 | } |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 274 | mutex_unlock(&dev->struct_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | } |
| 276 | |
| 277 | /** |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 278 | * \c fault method for DMA virtual memory. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | * |
| 280 | * \param vma virtual memory area. |
| 281 | * \param address access address. |
| 282 | * \return pointer to the page structure. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 283 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | * Determine the page number from the page offset and get it from drm_device_dma::pagelist. |
| 285 | */ |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 286 | static int drm_do_vm_dma_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | { |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 288 | struct drm_file *priv = vma->vm_file->private_data; |
| 289 | struct drm_device *dev = priv->head->dev; |
Dave Airlie | cdd55a2 | 2007-07-11 16:32:08 +1000 | [diff] [blame] | 290 | struct drm_device_dma *dma = dev->dma; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 291 | unsigned long offset; |
| 292 | unsigned long page_nr; |
| 293 | struct page *page; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 295 | if (!dma) |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 296 | return VM_FAULT_SIGBUS; /* Error */ |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 297 | if (!dma->pagelist) |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 298 | return VM_FAULT_SIGBUS; /* Nothing allocated */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 300 | offset = (unsigned long)vmf->virtual_address - vma->vm_start; /* vm_[pg]off[set] should be 0 */ |
| 301 | page_nr = offset >> PAGE_SHIFT; /* page_nr could just be vmf->pgoff */ |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 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); |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 305 | vmf->page = page; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 307 | DRM_DEBUG("dma_fault 0x%lx (page %lu)\n", offset, page_nr); |
| 308 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | } |
| 310 | |
| 311 | /** |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 312 | * \c fault method for scatter-gather virtual memory. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | * |
| 314 | * \param vma virtual memory area. |
| 315 | * \param address access address. |
| 316 | * \return pointer to the page structure. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 317 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 318 | * Determine the map offset from the page offset and get it from drm_sg_mem::pagelist. |
| 319 | */ |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 320 | static int drm_do_vm_sg_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 321 | { |
Dave Airlie | c60ce62 | 2007-07-11 15:27:12 +1000 | [diff] [blame] | 322 | struct drm_map *map = (struct drm_map *) vma->vm_private_data; |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 323 | struct drm_file *priv = vma->vm_file->private_data; |
| 324 | struct drm_device *dev = priv->head->dev; |
Dave Airlie | 5591051 | 2007-07-11 16:53:40 +1000 | [diff] [blame] | 325 | struct drm_sg_mem *entry = dev->sg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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) |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 332 | return VM_FAULT_SIGBUS; /* Error */ |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 333 | if (!entry->pagelist) |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 334 | return VM_FAULT_SIGBUS; /* Nothing allocated */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 336 | offset = (unsigned long)vmf->virtual_address - vma->vm_start; |
Dave Airlie | d1f2b55 | 2005-08-05 22:11:22 +1000 | [diff] [blame] | 337 | map_offset = map->offset - (unsigned long)dev->sg->virtual; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | page_offset = (offset >> PAGE_SHIFT) + (map_offset >> PAGE_SHIFT); |
| 339 | page = entry->pagelist[page_offset]; |
| 340 | get_page(page); |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 341 | vmf->page = page; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 343 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | } |
| 345 | |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 346 | static int drm_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 347 | { |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 348 | return drm_do_vm_fault(vma, vmf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | } |
| 350 | |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 351 | static int drm_vm_shm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 352 | { |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 353 | return drm_do_vm_shm_fault(vma, vmf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | } |
| 355 | |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 356 | static int drm_vm_dma_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 357 | { |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 358 | return drm_do_vm_dma_fault(vma, vmf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | } |
| 360 | |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 361 | static int drm_vm_sg_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 362 | { |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 363 | return drm_do_vm_sg_fault(vma, vmf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | } |
| 365 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | /** AGP virtual memory operations */ |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 367 | static struct vm_operations_struct drm_vm_ops = { |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 368 | .fault = drm_vm_fault, |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 369 | .open = drm_vm_open, |
| 370 | .close = drm_vm_close, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | }; |
| 372 | |
| 373 | /** Shared virtual memory operations */ |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 374 | static struct vm_operations_struct drm_vm_shm_ops = { |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 375 | .fault = drm_vm_shm_fault, |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 376 | .open = drm_vm_open, |
| 377 | .close = drm_vm_shm_close, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | }; |
| 379 | |
| 380 | /** DMA virtual memory operations */ |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 381 | static struct vm_operations_struct drm_vm_dma_ops = { |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 382 | .fault = drm_vm_dma_fault, |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 383 | .open = drm_vm_open, |
| 384 | .close = drm_vm_close, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 385 | }; |
| 386 | |
| 387 | /** Scatter-gather virtual memory operations */ |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 388 | static struct vm_operations_struct drm_vm_sg_ops = { |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 389 | .fault = drm_vm_sg_fault, |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 390 | .open = drm_vm_open, |
| 391 | .close = drm_vm_close, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 392 | }; |
| 393 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | /** |
| 395 | * \c open method for shared virtual memory. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 396 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | * \param vma virtual memory area. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 398 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 399 | * Create a new drm_vma_entry structure as the \p vma private data entry and |
| 400 | * add it to drm_device::vmalist. |
| 401 | */ |
Thomas Hellstrom | d7d8aac | 2007-03-24 17:52:49 +1100 | [diff] [blame] | 402 | static void drm_vm_open_locked(struct vm_area_struct *vma) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | { |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 404 | struct drm_file *priv = vma->vm_file->private_data; |
| 405 | struct drm_device *dev = priv->head->dev; |
Dave Airlie | 8fc2fdf | 2007-07-11 16:21:47 +1000 | [diff] [blame] | 406 | struct drm_vma_entry *vma_entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | |
| 408 | DRM_DEBUG("0x%08lx,0x%08lx\n", |
| 409 | vma->vm_start, vma->vm_end - vma->vm_start); |
| 410 | atomic_inc(&dev->vma_count); |
| 411 | |
| 412 | vma_entry = drm_alloc(sizeof(*vma_entry), DRM_MEM_VMAS); |
| 413 | if (vma_entry) { |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 414 | vma_entry->vma = vma; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 415 | vma_entry->pid = current->pid; |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 416 | list_add(&vma_entry->head, &dev->vmalist); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | } |
| 418 | } |
| 419 | |
Thomas Hellstrom | d7d8aac | 2007-03-24 17:52:49 +1100 | [diff] [blame] | 420 | static void drm_vm_open(struct vm_area_struct *vma) |
| 421 | { |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 422 | struct drm_file *priv = vma->vm_file->private_data; |
| 423 | struct drm_device *dev = priv->head->dev; |
Thomas Hellstrom | d7d8aac | 2007-03-24 17:52:49 +1100 | [diff] [blame] | 424 | |
| 425 | mutex_lock(&dev->struct_mutex); |
| 426 | drm_vm_open_locked(vma); |
| 427 | mutex_unlock(&dev->struct_mutex); |
| 428 | } |
| 429 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | /** |
| 431 | * \c close method for all virtual memory types. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 432 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 433 | * \param vma virtual memory area. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 434 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | * Search the \p vma private data entry in drm_device::vmalist, unlink it, and |
| 436 | * free it. |
| 437 | */ |
Dave Airlie | c94f702 | 2005-07-07 21:03:38 +1000 | [diff] [blame] | 438 | static void drm_vm_close(struct vm_area_struct *vma) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | { |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 440 | struct drm_file *priv = vma->vm_file->private_data; |
| 441 | struct drm_device *dev = priv->head->dev; |
Dave Airlie | 8fc2fdf | 2007-07-11 16:21:47 +1000 | [diff] [blame] | 442 | struct drm_vma_entry *pt, *temp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | |
| 444 | DRM_DEBUG("0x%08lx,0x%08lx\n", |
| 445 | vma->vm_start, vma->vm_end - vma->vm_start); |
| 446 | atomic_dec(&dev->vma_count); |
| 447 | |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 448 | mutex_lock(&dev->struct_mutex); |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 449 | list_for_each_entry_safe(pt, temp, &dev->vmalist, head) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | if (pt->vma == vma) { |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 451 | list_del(&pt->head); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | drm_free(pt, sizeof(*pt), DRM_MEM_VMAS); |
| 453 | break; |
| 454 | } |
| 455 | } |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 456 | mutex_unlock(&dev->struct_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | } |
| 458 | |
| 459 | /** |
| 460 | * mmap DMA memory. |
| 461 | * |
Eric Anholt | 6c340ea | 2007-08-25 20:23:09 +1000 | [diff] [blame] | 462 | * \param file_priv DRM file private. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | * \param vma virtual memory area. |
| 464 | * \return zero on success or a negative number on failure. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 465 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 466 | * Sets the virtual memory area operations structure to vm_dma_ops, the file |
| 467 | * pointer, and calls vm_open(). |
| 468 | */ |
Dave Airlie | c94f702 | 2005-07-07 21:03:38 +1000 | [diff] [blame] | 469 | 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] | 470 | { |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 471 | struct drm_file *priv = filp->private_data; |
| 472 | struct drm_device *dev; |
Dave Airlie | cdd55a2 | 2007-07-11 16:32:08 +1000 | [diff] [blame] | 473 | struct drm_device_dma *dma; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 474 | unsigned long length = vma->vm_end - vma->vm_start; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 475 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 476 | dev = priv->head->dev; |
| 477 | dma = dev->dma; |
Thomas Hellstrom | 1545085 | 2007-02-08 16:14:05 +1100 | [diff] [blame] | 478 | DRM_DEBUG("start = 0x%lx, end = 0x%lx, page offset = 0x%lx\n", |
| 479 | vma->vm_start, vma->vm_end, vma->vm_pgoff); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 480 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 481 | /* Length must match exact page count */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | if (!dma || (length >> PAGE_SHIFT) != dma->page_count) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 483 | return -EINVAL; |
| 484 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 485 | |
George Sapountzis | 3417f33 | 2006-10-24 12:03:04 -0700 | [diff] [blame] | 486 | if (!capable(CAP_SYS_ADMIN) && |
| 487 | (dma->flags & _DRM_DMA_USE_PCI_RO)) { |
| 488 | vma->vm_flags &= ~(VM_WRITE | VM_MAYWRITE); |
| 489 | #if defined(__i386__) || defined(__x86_64__) |
| 490 | pgprot_val(vma->vm_page_prot) &= ~_PAGE_RW; |
| 491 | #else |
| 492 | /* Ye gads this is ugly. With more thought |
| 493 | we could move this up higher and use |
| 494 | `protection_map' instead. */ |
| 495 | vma->vm_page_prot = |
| 496 | __pgprot(pte_val |
| 497 | (pte_wrprotect |
| 498 | (__pte(pgprot_val(vma->vm_page_prot))))); |
| 499 | #endif |
| 500 | } |
| 501 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 502 | vma->vm_ops = &drm_vm_dma_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 504 | vma->vm_flags |= VM_RESERVED; /* Don't swap */ |
Nick Piggin | 2f98735 | 2008-02-02 03:08:53 +0100 | [diff] [blame] | 505 | vma->vm_flags |= VM_DONTEXPAND; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 507 | vma->vm_file = filp; /* Needed for drm_vm_open() */ |
Thomas Hellstrom | d7d8aac | 2007-03-24 17:52:49 +1100 | [diff] [blame] | 508 | drm_vm_open_locked(vma); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | return 0; |
| 510 | } |
| 511 | |
Dave Airlie | c60ce62 | 2007-07-11 15:27:12 +1000 | [diff] [blame] | 512 | unsigned long drm_core_get_map_ofs(struct drm_map * map) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | { |
| 514 | return map->offset; |
| 515 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 516 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | EXPORT_SYMBOL(drm_core_get_map_ofs); |
| 518 | |
| 519 | unsigned long drm_core_get_reg_ofs(struct drm_device *dev) |
| 520 | { |
| 521 | #ifdef __alpha__ |
| 522 | return dev->hose->dense_mem_base - dev->hose->mem_space->start; |
| 523 | #else |
| 524 | return 0; |
| 525 | #endif |
| 526 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 527 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | EXPORT_SYMBOL(drm_core_get_reg_ofs); |
| 529 | |
| 530 | /** |
| 531 | * mmap DMA memory. |
| 532 | * |
Eric Anholt | 6c340ea | 2007-08-25 20:23:09 +1000 | [diff] [blame] | 533 | * \param file_priv DRM file private. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | * \param vma virtual memory area. |
| 535 | * \return zero on success or a negative number on failure. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 536 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | * If the virtual memory area has no offset associated with it then it's a DMA |
| 538 | * area, so calls mmap_dma(). Otherwise searches the map in drm_device::maplist, |
| 539 | * checks that the restricted flag is not set, sets the virtual memory operations |
| 540 | * according to the mapping type and remaps the pages. Finally sets the file |
| 541 | * pointer and calls vm_open(). |
| 542 | */ |
Thomas Hellstrom | d7d8aac | 2007-03-24 17:52:49 +1100 | [diff] [blame] | 543 | 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] | 544 | { |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 545 | struct drm_file *priv = filp->private_data; |
| 546 | struct drm_device *dev = priv->head->dev; |
Dave Airlie | c60ce62 | 2007-07-11 15:27:12 +1000 | [diff] [blame] | 547 | struct drm_map *map = NULL; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 548 | unsigned long offset = 0; |
Dave Airlie | e0be428 | 2007-07-12 10:26:44 +1000 | [diff] [blame] | 549 | struct drm_hash_item *hash; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 550 | |
Thomas Hellstrom | 1545085 | 2007-02-08 16:14:05 +1100 | [diff] [blame] | 551 | DRM_DEBUG("start = 0x%lx, end = 0x%lx, page offset = 0x%lx\n", |
| 552 | vma->vm_start, vma->vm_end, vma->vm_pgoff); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 553 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 554 | if (!priv->authenticated) |
| 555 | return -EACCES; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 556 | |
| 557 | /* We check for "dma". On Apple's UniNorth, it's valid to have |
| 558 | * the AGP mapped at physical address 0 |
| 559 | * --BenH. |
| 560 | */ |
Thomas Hellstrom | 1545085 | 2007-02-08 16:14:05 +1100 | [diff] [blame] | 561 | if (!vma->vm_pgoff |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 562 | #if __OS_HAS_AGP |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 563 | && (!dev->agp |
| 564 | || dev->agp->agp_info.device->vendor != PCI_VENDOR_ID_APPLE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 565 | #endif |
| 566 | ) |
| 567 | return drm_mmap_dma(filp, vma); |
| 568 | |
Thomas Hellstrom | 1545085 | 2007-02-08 16:14:05 +1100 | [diff] [blame] | 569 | if (drm_ht_find_item(&dev->map_hash, vma->vm_pgoff, &hash)) { |
Thomas Hellstrom | 8d153f7 | 2006-08-07 22:36:47 +1000 | [diff] [blame] | 570 | DRM_ERROR("Could not find map\n"); |
| 571 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | } |
| 573 | |
Dave Airlie | 5591051 | 2007-07-11 16:53:40 +1000 | [diff] [blame] | 574 | map = drm_hash_entry(hash, struct drm_map_list, hash)->map; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 575 | if (!map || ((map->flags & _DRM_RESTRICTED) && !capable(CAP_SYS_ADMIN))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | return -EPERM; |
| 577 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 578 | /* Check for valid size. */ |
Dave Airlie | 54ba2f7 | 2007-02-10 12:07:47 +1100 | [diff] [blame] | 579 | if (map->size < vma->vm_end - vma->vm_start) |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 580 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 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 = |
| 591 | __pgprot(pte_val |
| 592 | (pte_wrprotect |
| 593 | (__pte(pgprot_val(vma->vm_page_prot))))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 594 | #endif |
| 595 | } |
| 596 | |
| 597 | switch (map->type) { |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 598 | case _DRM_AGP: |
| 599 | if (drm_core_has_AGP(dev) && dev->agp->cant_use_aperture) { |
| 600 | /* |
| 601 | * On some platforms we can't talk to bus dma address from the CPU, so for |
| 602 | * memory of type DRM_AGP, we'll deal with sorting out the real physical |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 603 | * pages and mappings in fault() |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 604 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 605 | #if defined(__powerpc__) |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 606 | pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 607 | #endif |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 608 | vma->vm_ops = &drm_vm_ops; |
| 609 | break; |
| 610 | } |
| 611 | /* fall through to _DRM_FRAME_BUFFER... */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 612 | case _DRM_FRAME_BUFFER: |
| 613 | case _DRM_REGISTERS: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | offset = dev->driver->get_reg_ofs(dev); |
Dave Airlie | 5cc7f9a | 2007-02-10 11:53:13 +1100 | [diff] [blame] | 615 | vma->vm_flags |= VM_IO; /* not in core dump */ |
| 616 | vma->vm_page_prot = drm_io_prot(map->type, vma); |
Dave Airlie | 9e9c132 | 2007-03-24 17:57:54 +1100 | [diff] [blame] | 617 | 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 Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 621 | return -EAGAIN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 622 | DRM_DEBUG(" Type = %d; start = 0x%lx, end = 0x%lx," |
| 623 | " offset = 0x%lx\n", |
| 624 | map->type, |
Dave Airlie | d1f2b55 | 2005-08-05 22:11:22 +1000 | [diff] [blame] | 625 | vma->vm_start, vma->vm_end, map->offset + offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | vma->vm_ops = &drm_vm_ops; |
| 627 | break; |
Dave Airlie | 2d0f9ea | 2005-07-10 14:34:13 +1000 | [diff] [blame] | 628 | case _DRM_CONSISTENT: |
Hugh Dickins | 3831587 | 2007-03-24 17:55:16 +1100 | [diff] [blame] | 629 | /* Consistent memory is really like shared memory. But |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 630 | * it's allocated in a different way, so avoid fault */ |
Hugh Dickins | 3831587 | 2007-03-24 17:55:16 +1100 | [diff] [blame] | 631 | if (remap_pfn_range(vma, vma->vm_start, |
| 632 | page_to_pfn(virt_to_page(map->handle)), |
| 633 | vma->vm_end - vma->vm_start, vma->vm_page_prot)) |
| 634 | return -EAGAIN; |
Benjamin Herrenschmidt | 6876b3b | 2008-03-28 14:23:07 -0700 | [diff] [blame] | 635 | vma->vm_page_prot = drm_dma_prot(map->type, vma); |
Hugh Dickins | 3831587 | 2007-03-24 17:55:16 +1100 | [diff] [blame] | 636 | /* fall through to _DRM_SHM */ |
| 637 | case _DRM_SHM: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 638 | vma->vm_ops = &drm_vm_shm_ops; |
| 639 | vma->vm_private_data = (void *)map; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 640 | /* Don't let this area swap. Change when |
| 641 | DRM_KERNEL advisory is supported. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 642 | vma->vm_flags |= VM_RESERVED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | break; |
| 644 | case _DRM_SCATTER_GATHER: |
| 645 | vma->vm_ops = &drm_vm_sg_ops; |
| 646 | vma->vm_private_data = (void *)map; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 647 | vma->vm_flags |= VM_RESERVED; |
Benjamin Herrenschmidt | 5ff6461 | 2008-04-20 10:26:25 +1000 | [diff] [blame^] | 648 | vma->vm_page_prot = drm_dma_prot(map->type, vma); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 649 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 650 | default: |
| 651 | return -EINVAL; /* This should never happen. */ |
| 652 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 653 | vma->vm_flags |= VM_RESERVED; /* Don't swap */ |
Nick Piggin | 2f98735 | 2008-02-02 03:08:53 +0100 | [diff] [blame] | 654 | vma->vm_flags |= VM_DONTEXPAND; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 655 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 656 | vma->vm_file = filp; /* Needed for drm_vm_open() */ |
Thomas Hellstrom | d7d8aac | 2007-03-24 17:52:49 +1100 | [diff] [blame] | 657 | drm_vm_open_locked(vma); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 658 | return 0; |
| 659 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 660 | |
Thomas Hellstrom | d7d8aac | 2007-03-24 17:52:49 +1100 | [diff] [blame] | 661 | int drm_mmap(struct file *filp, struct vm_area_struct *vma) |
| 662 | { |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 663 | struct drm_file *priv = filp->private_data; |
| 664 | struct drm_device *dev = priv->head->dev; |
Thomas Hellstrom | d7d8aac | 2007-03-24 17:52:49 +1100 | [diff] [blame] | 665 | int ret; |
| 666 | |
| 667 | mutex_lock(&dev->struct_mutex); |
| 668 | ret = drm_mmap_locked(filp, vma); |
| 669 | mutex_unlock(&dev->struct_mutex); |
| 670 | |
| 671 | return ret; |
| 672 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 673 | EXPORT_SYMBOL(drm_mmap); |