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 | |
David Howells | 760285e | 2012-10-02 18:01:07 +0100 | [diff] [blame^] | 36 | #include <drm/drmP.h> |
Paul Gortmaker | 2d1a8a4 | 2011-08-30 18:16:33 -0400 | [diff] [blame] | 37 | #include <linux/export.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | #if defined(__ia64__) |
| 39 | #include <linux/efi.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 40 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | #endif |
| 42 | |
Dave Airlie | c94f702 | 2005-07-07 21:03:38 +1000 | [diff] [blame] | 43 | static void drm_vm_open(struct vm_area_struct *vma); |
| 44 | static void drm_vm_close(struct vm_area_struct *vma); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | |
Adrian Bunk | 0bead7c | 2007-03-11 11:41:16 +1100 | [diff] [blame] | 46 | 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] | 47 | { |
| 48 | pgprot_t tmp = vm_get_page_prot(vma->vm_flags); |
| 49 | |
| 50 | #if defined(__i386__) || defined(__x86_64__) |
| 51 | if (boot_cpu_data.x86 > 3 && map_type != _DRM_AGP) { |
| 52 | pgprot_val(tmp) |= _PAGE_PCD; |
| 53 | pgprot_val(tmp) &= ~_PAGE_PWT; |
| 54 | } |
| 55 | #elif defined(__powerpc__) |
| 56 | pgprot_val(tmp) |= _PAGE_NO_CACHE; |
| 57 | if (map_type == _DRM_REGISTERS) |
| 58 | pgprot_val(tmp) |= _PAGE_GUARDED; |
Benjamin Herrenschmidt | 6876b3b | 2008-03-28 14:23:07 -0700 | [diff] [blame] | 59 | #elif defined(__ia64__) |
Dave Airlie | 5cc7f9a | 2007-02-10 11:53:13 +1100 | [diff] [blame] | 60 | if (efi_range_is_wc(vma->vm_start, vma->vm_end - |
| 61 | vma->vm_start)) |
| 62 | tmp = pgprot_writecombine(tmp); |
| 63 | else |
| 64 | tmp = pgprot_noncached(tmp); |
Jordan Crouse | 4b7fb9b | 2010-05-27 13:40:26 -0600 | [diff] [blame] | 65 | #elif defined(__sparc__) || defined(__arm__) |
Benjamin Herrenschmidt | 6876b3b | 2008-03-28 14:23:07 -0700 | [diff] [blame] | 66 | tmp = pgprot_noncached(tmp); |
| 67 | #endif |
| 68 | return tmp; |
| 69 | } |
| 70 | |
| 71 | static pgprot_t drm_dma_prot(uint32_t map_type, struct vm_area_struct *vma) |
| 72 | { |
| 73 | pgprot_t tmp = vm_get_page_prot(vma->vm_flags); |
| 74 | |
| 75 | #if defined(__powerpc__) && defined(CONFIG_NOT_COHERENT_CACHE) |
| 76 | tmp |= _PAGE_NO_CACHE; |
Dave Airlie | 5cc7f9a | 2007-02-10 11:53:13 +1100 | [diff] [blame] | 77 | #endif |
| 78 | return tmp; |
| 79 | } |
| 80 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | /** |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 82 | * \c fault method for AGP virtual memory. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | * |
| 84 | * \param vma virtual memory area. |
| 85 | * \param address access address. |
| 86 | * \return pointer to the page structure. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 87 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | * Find the right map and if it's AGP memory find the real physical page to |
| 89 | * map, get the page, increment the use count and return it. |
| 90 | */ |
| 91 | #if __OS_HAS_AGP |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 92 | 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] | 93 | { |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 94 | struct drm_file *priv = vma->vm_file->private_data; |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 95 | struct drm_device *dev = priv->minor->dev; |
Benjamin Herrenschmidt | f77d390 | 2009-02-02 16:55:46 +1100 | [diff] [blame] | 96 | struct drm_local_map *map = NULL; |
Dave Airlie | 5591051 | 2007-07-11 16:53:40 +1000 | [diff] [blame] | 97 | struct drm_map_list *r_list; |
Dave Airlie | e0be428 | 2007-07-12 10:26:44 +1000 | [diff] [blame] | 98 | struct drm_hash_item *hash; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | |
| 100 | /* |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 101 | * Find the right map |
| 102 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | if (!drm_core_has_AGP(dev)) |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 104 | goto vm_fault_error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 106 | if (!dev->agp || !dev->agp->cant_use_aperture) |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 107 | goto vm_fault_error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | |
Thomas Hellstrom | 1545085 | 2007-02-08 16:14:05 +1100 | [diff] [blame] | 109 | if (drm_ht_find_item(&dev->map_hash, vma->vm_pgoff, &hash)) |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 110 | goto vm_fault_error; |
Thomas Hellstrom | 8d153f7 | 2006-08-07 22:36:47 +1000 | [diff] [blame] | 111 | |
Dave Airlie | 5591051 | 2007-07-11 16:53:40 +1000 | [diff] [blame] | 112 | r_list = drm_hash_entry(hash, struct drm_map_list, hash); |
Thomas Hellstrom | 8d153f7 | 2006-08-07 22:36:47 +1000 | [diff] [blame] | 113 | map = r_list->map; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | |
| 115 | if (map && map->type == _DRM_AGP) { |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 116 | /* |
| 117 | * Using vm_pgoff as a selector forces us to use this unusual |
| 118 | * addressing scheme. |
| 119 | */ |
Benjamin Herrenschmidt | 41c2e75 | 2009-02-02 16:55:47 +1100 | [diff] [blame] | 120 | resource_size_t offset = (unsigned long)vmf->virtual_address - |
| 121 | vma->vm_start; |
| 122 | resource_size_t baddr = map->offset + offset; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | struct drm_agp_mem *agpmem; |
| 124 | struct page *page; |
| 125 | |
| 126 | #ifdef __alpha__ |
| 127 | /* |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 128 | * Adjust to a bus-relative address |
| 129 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | baddr -= dev->hose->mem_space->start; |
| 131 | #endif |
| 132 | |
| 133 | /* |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 134 | * It's AGP memory - find the real physical page to map |
| 135 | */ |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 136 | list_for_each_entry(agpmem, &dev->agp->memory, head) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | if (agpmem->bound <= baddr && |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 138 | agpmem->bound + agpmem->pages * PAGE_SIZE > baddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | break; |
| 140 | } |
| 141 | |
Dan Carpenter | 161c481 | 2010-08-19 11:39:57 +0200 | [diff] [blame] | 142 | if (&agpmem->head == &dev->agp->memory) |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 143 | goto vm_fault_error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | |
| 145 | /* |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 146 | * Get the page, inc the use count, and return it |
| 147 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | offset = (baddr - agpmem->bound) >> PAGE_SHIFT; |
Dave Airlie | 07613ba | 2009-06-12 14:11:41 +1000 | [diff] [blame] | 149 | page = agpmem->memory->pages[offset]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | get_page(page); |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 151 | vmf->page = page; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 153 | DRM_DEBUG |
Benjamin Herrenschmidt | 41c2e75 | 2009-02-02 16:55:47 +1100 | [diff] [blame] | 154 | ("baddr = 0x%llx page = 0x%p, offset = 0x%llx, count=%d\n", |
| 155 | (unsigned long long)baddr, |
Dave Airlie | 07613ba | 2009-06-12 14:11:41 +1000 | [diff] [blame] | 156 | agpmem->memory->pages[offset], |
Benjamin Herrenschmidt | 41c2e75 | 2009-02-02 16:55:47 +1100 | [diff] [blame] | 157 | (unsigned long long)offset, |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 158 | page_count(page)); |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 159 | return 0; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 160 | } |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 161 | vm_fault_error: |
| 162 | return VM_FAULT_SIGBUS; /* Disallow mremap */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 164 | #else /* __OS_HAS_AGP */ |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 165 | 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] | 166 | { |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 167 | return VM_FAULT_SIGBUS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 169 | #endif /* __OS_HAS_AGP */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | |
| 171 | /** |
| 172 | * \c nopage method for shared virtual memory. |
| 173 | * |
| 174 | * \param vma virtual memory area. |
| 175 | * \param address access address. |
| 176 | * \return pointer to the page structure. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 177 | * |
Michael Opdenacker | 59c5159 | 2007-05-09 08:57:56 +0200 | [diff] [blame] | 178 | * 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] | 179 | * return it. |
| 180 | */ |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 181 | 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] | 182 | { |
Benjamin Herrenschmidt | f77d390 | 2009-02-02 16:55:46 +1100 | [diff] [blame] | 183 | struct drm_local_map *map = vma->vm_private_data; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 184 | unsigned long offset; |
| 185 | unsigned long i; |
| 186 | struct page *page; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 188 | if (!map) |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 189 | return VM_FAULT_SIGBUS; /* Nothing allocated */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 191 | offset = (unsigned long)vmf->virtual_address - vma->vm_start; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | i = (unsigned long)map->handle + offset; |
Hugh Dickins | 3831587 | 2007-03-24 17:55:16 +1100 | [diff] [blame] | 193 | page = vmalloc_to_page((void *)i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | if (!page) |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 195 | return VM_FAULT_SIGBUS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | get_page(page); |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 197 | vmf->page = page; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 199 | DRM_DEBUG("shm_fault 0x%lx\n", offset); |
| 200 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | } |
| 202 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | /** |
| 204 | * \c close method for shared virtual memory. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 205 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | * \param vma virtual memory area. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 207 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | * Deletes map information if we are the last |
| 209 | * person to close a mapping and it's not in the global maplist. |
| 210 | */ |
Dave Airlie | c94f702 | 2005-07-07 21:03:38 +1000 | [diff] [blame] | 211 | static void drm_vm_shm_close(struct vm_area_struct *vma) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | { |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 213 | struct drm_file *priv = vma->vm_file->private_data; |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 214 | struct drm_device *dev = priv->minor->dev; |
Dave Airlie | 8fc2fdf | 2007-07-11 16:21:47 +1000 | [diff] [blame] | 215 | struct drm_vma_entry *pt, *temp; |
Benjamin Herrenschmidt | f77d390 | 2009-02-02 16:55:46 +1100 | [diff] [blame] | 216 | struct drm_local_map *map; |
Dave Airlie | 5591051 | 2007-07-11 16:53:40 +1000 | [diff] [blame] | 217 | struct drm_map_list *r_list; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | int found_maps = 0; |
| 219 | |
| 220 | DRM_DEBUG("0x%08lx,0x%08lx\n", |
| 221 | vma->vm_start, vma->vm_end - vma->vm_start); |
| 222 | atomic_dec(&dev->vma_count); |
| 223 | |
| 224 | map = vma->vm_private_data; |
| 225 | |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 226 | mutex_lock(&dev->struct_mutex); |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 227 | list_for_each_entry_safe(pt, temp, &dev->vmalist, head) { |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 228 | if (pt->vma->vm_private_data == map) |
| 229 | found_maps++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | if (pt->vma == vma) { |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 231 | list_del(&pt->head); |
Eric Anholt | 9a298b2 | 2009-03-24 12:23:04 -0700 | [diff] [blame] | 232 | kfree(pt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | } |
| 234 | } |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 235 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | /* We were the only map that was found */ |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 237 | if (found_maps == 1 && map->flags & _DRM_REMOVABLE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | /* Check to see if we are in the maplist, if we are not, then |
| 239 | * we delete this mappings information. |
| 240 | */ |
| 241 | found_maps = 0; |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 242 | list_for_each_entry(r_list, &dev->maplist, head) { |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 243 | if (r_list->map == map) |
| 244 | found_maps++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | } |
| 246 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 247 | if (!found_maps) { |
Dave Airlie | 9c8da5e | 2005-07-10 15:38:56 +1000 | [diff] [blame] | 248 | drm_dma_handle_t dmah; |
| 249 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | switch (map->type) { |
| 251 | case _DRM_REGISTERS: |
| 252 | case _DRM_FRAME_BUFFER: |
| 253 | if (drm_core_has_MTRR(dev) && map->mtrr >= 0) { |
| 254 | int retcode; |
| 255 | retcode = mtrr_del(map->mtrr, |
| 256 | map->offset, |
| 257 | map->size); |
| 258 | DRM_DEBUG("mtrr_del = %d\n", retcode); |
| 259 | } |
Christoph Hellwig | 004a772 | 2007-01-08 21:56:59 +1100 | [diff] [blame] | 260 | iounmap(map->handle); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | break; |
| 262 | case _DRM_SHM: |
| 263 | vfree(map->handle); |
| 264 | break; |
| 265 | case _DRM_AGP: |
| 266 | case _DRM_SCATTER_GATHER: |
| 267 | break; |
Dave Airlie | 2d0f9ea | 2005-07-10 14:34:13 +1000 | [diff] [blame] | 268 | case _DRM_CONSISTENT: |
Dave Airlie | 9c8da5e | 2005-07-10 15:38:56 +1000 | [diff] [blame] | 269 | dmah.vaddr = map->handle; |
| 270 | dmah.busaddr = map->offset; |
| 271 | dmah.size = map->size; |
| 272 | __drm_pci_free(dev, &dmah); |
Dave Airlie | 2d0f9ea | 2005-07-10 14:34:13 +1000 | [diff] [blame] | 273 | break; |
Jesse Barnes | a2c0a97 | 2008-11-05 10:31:53 -0800 | [diff] [blame] | 274 | case _DRM_GEM: |
| 275 | DRM_ERROR("tried to rmmap GEM object\n"); |
| 276 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | } |
Eric Anholt | 9a298b2 | 2009-03-24 12:23:04 -0700 | [diff] [blame] | 278 | kfree(map); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | } |
| 280 | } |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 281 | mutex_unlock(&dev->struct_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | } |
| 283 | |
| 284 | /** |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 285 | * \c fault method for DMA virtual memory. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 286 | * |
| 287 | * \param vma virtual memory area. |
| 288 | * \param address access address. |
| 289 | * \return pointer to the page structure. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 290 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | * Determine the page number from the page offset and get it from drm_device_dma::pagelist. |
| 292 | */ |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 293 | 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] | 294 | { |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 295 | struct drm_file *priv = vma->vm_file->private_data; |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 296 | struct drm_device *dev = priv->minor->dev; |
Dave Airlie | cdd55a2 | 2007-07-11 16:32:08 +1000 | [diff] [blame] | 297 | struct drm_device_dma *dma = dev->dma; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 298 | unsigned long offset; |
| 299 | unsigned long page_nr; |
| 300 | struct page *page; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 302 | if (!dma) |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 303 | return VM_FAULT_SIGBUS; /* Error */ |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 304 | if (!dma->pagelist) |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 305 | return VM_FAULT_SIGBUS; /* Nothing allocated */ |
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 | offset = (unsigned long)vmf->virtual_address - vma->vm_start; /* vm_[pg]off[set] should be 0 */ |
| 308 | page_nr = offset >> PAGE_SHIFT; /* page_nr could just be vmf->pgoff */ |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 309 | page = virt_to_page((dma->pagelist[page_nr] + (offset & (~PAGE_MASK)))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | |
| 311 | get_page(page); |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 312 | vmf->page = page; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 314 | DRM_DEBUG("dma_fault 0x%lx (page %lu)\n", offset, page_nr); |
| 315 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | } |
| 317 | |
| 318 | /** |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 319 | * \c fault method for scatter-gather virtual memory. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | * |
| 321 | * \param vma virtual memory area. |
| 322 | * \param address access address. |
| 323 | * \return pointer to the page structure. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 324 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | * Determine the map offset from the page offset and get it from drm_sg_mem::pagelist. |
| 326 | */ |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 327 | 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] | 328 | { |
Benjamin Herrenschmidt | f77d390 | 2009-02-02 16:55:46 +1100 | [diff] [blame] | 329 | struct drm_local_map *map = vma->vm_private_data; |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 330 | struct drm_file *priv = vma->vm_file->private_data; |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 331 | struct drm_device *dev = priv->minor->dev; |
Dave Airlie | 5591051 | 2007-07-11 16:53:40 +1000 | [diff] [blame] | 332 | struct drm_sg_mem *entry = dev->sg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | unsigned long offset; |
| 334 | unsigned long map_offset; |
| 335 | unsigned long page_offset; |
| 336 | struct page *page; |
| 337 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 338 | if (!entry) |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 339 | return VM_FAULT_SIGBUS; /* Error */ |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 340 | if (!entry->pagelist) |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 341 | return VM_FAULT_SIGBUS; /* Nothing allocated */ |
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 | offset = (unsigned long)vmf->virtual_address - vma->vm_start; |
Dave Airlie | d1f2b55 | 2005-08-05 22:11:22 +1000 | [diff] [blame] | 344 | map_offset = map->offset - (unsigned long)dev->sg->virtual; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | page_offset = (offset >> PAGE_SHIFT) + (map_offset >> PAGE_SHIFT); |
| 346 | page = entry->pagelist[page_offset]; |
| 347 | get_page(page); |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 348 | vmf->page = page; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 350 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | } |
| 352 | |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 353 | 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] | 354 | { |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 355 | return drm_do_vm_fault(vma, vmf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | } |
| 357 | |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 358 | 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] | 359 | { |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 360 | return drm_do_vm_shm_fault(vma, vmf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | } |
| 362 | |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 363 | 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] | 364 | { |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 365 | return drm_do_vm_dma_fault(vma, vmf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | } |
| 367 | |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 368 | 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] | 369 | { |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 370 | return drm_do_vm_sg_fault(vma, vmf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | } |
| 372 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | /** AGP virtual memory operations */ |
Alexey Dobriyan | f0f37e2 | 2009-09-27 22:29:37 +0400 | [diff] [blame] | 374 | static const struct vm_operations_struct drm_vm_ops = { |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 375 | .fault = drm_vm_fault, |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 376 | .open = drm_vm_open, |
| 377 | .close = drm_vm_close, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | }; |
| 379 | |
| 380 | /** Shared virtual memory operations */ |
Alexey Dobriyan | f0f37e2 | 2009-09-27 22:29:37 +0400 | [diff] [blame] | 381 | static const struct vm_operations_struct drm_vm_shm_ops = { |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 382 | .fault = drm_vm_shm_fault, |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 383 | .open = drm_vm_open, |
| 384 | .close = drm_vm_shm_close, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 385 | }; |
| 386 | |
| 387 | /** DMA virtual memory operations */ |
Alexey Dobriyan | f0f37e2 | 2009-09-27 22:29:37 +0400 | [diff] [blame] | 388 | static const struct vm_operations_struct drm_vm_dma_ops = { |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 389 | .fault = drm_vm_dma_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 | |
| 394 | /** Scatter-gather virtual memory operations */ |
Alexey Dobriyan | f0f37e2 | 2009-09-27 22:29:37 +0400 | [diff] [blame] | 395 | static const struct vm_operations_struct drm_vm_sg_ops = { |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 396 | .fault = drm_vm_sg_fault, |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 397 | .open = drm_vm_open, |
| 398 | .close = drm_vm_close, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 399 | }; |
| 400 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | /** |
| 402 | * \c open method for shared virtual memory. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 403 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | * \param vma virtual memory area. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 405 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | * Create a new drm_vma_entry structure as the \p vma private data entry and |
| 407 | * add it to drm_device::vmalist. |
| 408 | */ |
Rob Clark | b06d66b | 2012-05-01 11:04:51 -0500 | [diff] [blame] | 409 | void drm_vm_open_locked(struct drm_device *dev, |
| 410 | struct vm_area_struct *vma) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | { |
Dave Airlie | 8fc2fdf | 2007-07-11 16:21:47 +1000 | [diff] [blame] | 412 | struct drm_vma_entry *vma_entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 413 | |
| 414 | DRM_DEBUG("0x%08lx,0x%08lx\n", |
| 415 | vma->vm_start, vma->vm_end - vma->vm_start); |
| 416 | atomic_inc(&dev->vma_count); |
| 417 | |
Eric Anholt | 9a298b2 | 2009-03-24 12:23:04 -0700 | [diff] [blame] | 418 | vma_entry = kmalloc(sizeof(*vma_entry), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | if (vma_entry) { |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 420 | vma_entry->vma = vma; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 421 | vma_entry->pid = current->pid; |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 422 | list_add(&vma_entry->head, &dev->vmalist); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | } |
| 424 | } |
| 425 | |
Thomas Hellstrom | d7d8aac | 2007-03-24 17:52:49 +1100 | [diff] [blame] | 426 | static void drm_vm_open(struct vm_area_struct *vma) |
| 427 | { |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 428 | struct drm_file *priv = vma->vm_file->private_data; |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 429 | struct drm_device *dev = priv->minor->dev; |
Thomas Hellstrom | d7d8aac | 2007-03-24 17:52:49 +1100 | [diff] [blame] | 430 | |
| 431 | mutex_lock(&dev->struct_mutex); |
Rob Clark | b06d66b | 2012-05-01 11:04:51 -0500 | [diff] [blame] | 432 | drm_vm_open_locked(dev, vma); |
Thomas Hellstrom | d7d8aac | 2007-03-24 17:52:49 +1100 | [diff] [blame] | 433 | mutex_unlock(&dev->struct_mutex); |
| 434 | } |
| 435 | |
Rob Clark | b06d66b | 2012-05-01 11:04:51 -0500 | [diff] [blame] | 436 | void drm_vm_close_locked(struct drm_device *dev, |
| 437 | struct vm_area_struct *vma) |
Chris Wilson | 31dfbc9 | 2010-09-27 21:28:30 +0100 | [diff] [blame] | 438 | { |
Chris Wilson | 31dfbc9 | 2010-09-27 21:28:30 +0100 | [diff] [blame] | 439 | struct drm_vma_entry *pt, *temp; |
| 440 | |
| 441 | DRM_DEBUG("0x%08lx,0x%08lx\n", |
| 442 | vma->vm_start, vma->vm_end - vma->vm_start); |
| 443 | atomic_dec(&dev->vma_count); |
| 444 | |
| 445 | list_for_each_entry_safe(pt, temp, &dev->vmalist, head) { |
| 446 | if (pt->vma == vma) { |
| 447 | list_del(&pt->head); |
| 448 | kfree(pt); |
| 449 | break; |
| 450 | } |
| 451 | } |
| 452 | } |
| 453 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 454 | /** |
| 455 | * \c close method for all virtual memory types. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 456 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | * \param vma virtual memory area. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 458 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 459 | * Search the \p vma private data entry in drm_device::vmalist, unlink it, and |
| 460 | * free it. |
| 461 | */ |
Dave Airlie | c94f702 | 2005-07-07 21:03:38 +1000 | [diff] [blame] | 462 | static void drm_vm_close(struct vm_area_struct *vma) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | { |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 464 | struct drm_file *priv = vma->vm_file->private_data; |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 465 | struct drm_device *dev = priv->minor->dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 466 | |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 467 | mutex_lock(&dev->struct_mutex); |
Rob Clark | b06d66b | 2012-05-01 11:04:51 -0500 | [diff] [blame] | 468 | drm_vm_close_locked(dev, vma); |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 469 | mutex_unlock(&dev->struct_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 470 | } |
| 471 | |
| 472 | /** |
| 473 | * mmap DMA memory. |
| 474 | * |
Eric Anholt | 6c340ea | 2007-08-25 20:23:09 +1000 | [diff] [blame] | 475 | * \param file_priv DRM file private. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | * \param vma virtual memory area. |
| 477 | * \return zero on success or a negative number on failure. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 478 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 479 | * Sets the virtual memory area operations structure to vm_dma_ops, the file |
| 480 | * pointer, and calls vm_open(). |
| 481 | */ |
Dave Airlie | c94f702 | 2005-07-07 21:03:38 +1000 | [diff] [blame] | 482 | 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] | 483 | { |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 484 | struct drm_file *priv = filp->private_data; |
| 485 | struct drm_device *dev; |
Dave Airlie | cdd55a2 | 2007-07-11 16:32:08 +1000 | [diff] [blame] | 486 | struct drm_device_dma *dma; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 487 | unsigned long length = vma->vm_end - vma->vm_start; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 489 | dev = priv->minor->dev; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 490 | dma = dev->dma; |
Thomas Hellstrom | 1545085 | 2007-02-08 16:14:05 +1100 | [diff] [blame] | 491 | DRM_DEBUG("start = 0x%lx, end = 0x%lx, page offset = 0x%lx\n", |
| 492 | vma->vm_start, vma->vm_end, vma->vm_pgoff); |
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 | /* Length must match exact page count */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 495 | if (!dma || (length >> PAGE_SHIFT) != dma->page_count) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | return -EINVAL; |
| 497 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | |
George Sapountzis | 3417f33 | 2006-10-24 12:03:04 -0700 | [diff] [blame] | 499 | if (!capable(CAP_SYS_ADMIN) && |
| 500 | (dma->flags & _DRM_DMA_USE_PCI_RO)) { |
| 501 | vma->vm_flags &= ~(VM_WRITE | VM_MAYWRITE); |
| 502 | #if defined(__i386__) || defined(__x86_64__) |
| 503 | pgprot_val(vma->vm_page_prot) &= ~_PAGE_RW; |
| 504 | #else |
| 505 | /* Ye gads this is ugly. With more thought |
| 506 | we could move this up higher and use |
| 507 | `protection_map' instead. */ |
| 508 | vma->vm_page_prot = |
| 509 | __pgprot(pte_val |
| 510 | (pte_wrprotect |
| 511 | (__pte(pgprot_val(vma->vm_page_prot))))); |
| 512 | #endif |
| 513 | } |
| 514 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 515 | vma->vm_ops = &drm_vm_dma_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 516 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 517 | vma->vm_flags |= VM_RESERVED; /* Don't swap */ |
Nick Piggin | 2f98735 | 2008-02-02 03:08:53 +0100 | [diff] [blame] | 518 | vma->vm_flags |= VM_DONTEXPAND; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | |
Rob Clark | b06d66b | 2012-05-01 11:04:51 -0500 | [diff] [blame] | 520 | drm_vm_open_locked(dev, vma); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 521 | return 0; |
| 522 | } |
| 523 | |
Daniel Vetter | cbc60ca | 2010-08-23 22:53:28 +0200 | [diff] [blame] | 524 | static resource_size_t drm_core_get_reg_ofs(struct drm_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 525 | { |
| 526 | #ifdef __alpha__ |
Jay Estabrook | 82ba3fe | 2011-06-09 18:18:39 -0400 | [diff] [blame] | 527 | return dev->hose->dense_mem_base; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | #else |
| 529 | return 0; |
| 530 | #endif |
| 531 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 532 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 533 | /** |
| 534 | * mmap DMA memory. |
| 535 | * |
Eric Anholt | 6c340ea | 2007-08-25 20:23:09 +1000 | [diff] [blame] | 536 | * \param file_priv DRM file private. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | * \param vma virtual memory area. |
| 538 | * \return zero on success or a negative number on failure. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 539 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 540 | * If the virtual memory area has no offset associated with it then it's a DMA |
| 541 | * area, so calls mmap_dma(). Otherwise searches the map in drm_device::maplist, |
| 542 | * checks that the restricted flag is not set, sets the virtual memory operations |
| 543 | * according to the mapping type and remaps the pages. Finally sets the file |
| 544 | * pointer and calls vm_open(). |
| 545 | */ |
Jesse Barnes | a2c0a97 | 2008-11-05 10:31:53 -0800 | [diff] [blame] | 546 | int drm_mmap_locked(struct file *filp, struct vm_area_struct *vma) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | { |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 548 | struct drm_file *priv = filp->private_data; |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 549 | struct drm_device *dev = priv->minor->dev; |
Benjamin Herrenschmidt | f77d390 | 2009-02-02 16:55:46 +1100 | [diff] [blame] | 550 | struct drm_local_map *map = NULL; |
Benjamin Herrenschmidt | 41c2e75 | 2009-02-02 16:55:47 +1100 | [diff] [blame] | 551 | resource_size_t offset = 0; |
Dave Airlie | e0be428 | 2007-07-12 10:26:44 +1000 | [diff] [blame] | 552 | struct drm_hash_item *hash; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 553 | |
Thomas Hellstrom | 1545085 | 2007-02-08 16:14:05 +1100 | [diff] [blame] | 554 | DRM_DEBUG("start = 0x%lx, end = 0x%lx, page offset = 0x%lx\n", |
| 555 | vma->vm_start, vma->vm_end, vma->vm_pgoff); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 556 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 557 | if (!priv->authenticated) |
| 558 | return -EACCES; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | |
| 560 | /* We check for "dma". On Apple's UniNorth, it's valid to have |
| 561 | * the AGP mapped at physical address 0 |
| 562 | * --BenH. |
| 563 | */ |
Thomas Hellstrom | 1545085 | 2007-02-08 16:14:05 +1100 | [diff] [blame] | 564 | if (!vma->vm_pgoff |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 565 | #if __OS_HAS_AGP |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 566 | && (!dev->agp |
| 567 | || dev->agp->agp_info.device->vendor != PCI_VENDOR_ID_APPLE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | #endif |
| 569 | ) |
| 570 | return drm_mmap_dma(filp, vma); |
| 571 | |
Thomas Hellstrom | 1545085 | 2007-02-08 16:14:05 +1100 | [diff] [blame] | 572 | if (drm_ht_find_item(&dev->map_hash, vma->vm_pgoff, &hash)) { |
Thomas Hellstrom | 8d153f7 | 2006-08-07 22:36:47 +1000 | [diff] [blame] | 573 | DRM_ERROR("Could not find map\n"); |
| 574 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 575 | } |
| 576 | |
Dave Airlie | 5591051 | 2007-07-11 16:53:40 +1000 | [diff] [blame] | 577 | map = drm_hash_entry(hash, struct drm_map_list, hash)->map; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 578 | if (!map || ((map->flags & _DRM_RESTRICTED) && !capable(CAP_SYS_ADMIN))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 579 | return -EPERM; |
| 580 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 581 | /* Check for valid size. */ |
Dave Airlie | 54ba2f7 | 2007-02-10 12:07:47 +1100 | [diff] [blame] | 582 | if (map->size < vma->vm_end - vma->vm_start) |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 583 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 584 | |
| 585 | if (!capable(CAP_SYS_ADMIN) && (map->flags & _DRM_READ_ONLY)) { |
| 586 | vma->vm_flags &= ~(VM_WRITE | VM_MAYWRITE); |
| 587 | #if defined(__i386__) || defined(__x86_64__) |
| 588 | pgprot_val(vma->vm_page_prot) &= ~_PAGE_RW; |
| 589 | #else |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 590 | /* Ye gads this is ugly. With more thought |
| 591 | we could move this up higher and use |
| 592 | `protection_map' instead. */ |
| 593 | vma->vm_page_prot = |
| 594 | __pgprot(pte_val |
| 595 | (pte_wrprotect |
| 596 | (__pte(pgprot_val(vma->vm_page_prot))))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 597 | #endif |
| 598 | } |
| 599 | |
| 600 | switch (map->type) { |
Jordan Crouse | 4b7fb9b | 2010-05-27 13:40:26 -0600 | [diff] [blame] | 601 | #if !defined(__arm__) |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 602 | case _DRM_AGP: |
| 603 | if (drm_core_has_AGP(dev) && dev->agp->cant_use_aperture) { |
| 604 | /* |
| 605 | * On some platforms we can't talk to bus dma address from the CPU, so for |
| 606 | * 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] | 607 | * pages and mappings in fault() |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 608 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 609 | #if defined(__powerpc__) |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 610 | pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 611 | #endif |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 612 | vma->vm_ops = &drm_vm_ops; |
| 613 | break; |
| 614 | } |
| 615 | /* fall through to _DRM_FRAME_BUFFER... */ |
Jordan Crouse | 4b7fb9b | 2010-05-27 13:40:26 -0600 | [diff] [blame] | 616 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 617 | case _DRM_FRAME_BUFFER: |
| 618 | case _DRM_REGISTERS: |
Daniel Vetter | cbc60ca | 2010-08-23 22:53:28 +0200 | [diff] [blame] | 619 | offset = drm_core_get_reg_ofs(dev); |
Dave Airlie | 5cc7f9a | 2007-02-10 11:53:13 +1100 | [diff] [blame] | 620 | vma->vm_flags |= VM_IO; /* not in core dump */ |
| 621 | vma->vm_page_prot = drm_io_prot(map->type, vma); |
Jordan Crouse | 4b7fb9b | 2010-05-27 13:40:26 -0600 | [diff] [blame] | 622 | #if !defined(__arm__) |
Dave Airlie | 9e9c132 | 2007-03-24 17:57:54 +1100 | [diff] [blame] | 623 | if (io_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)) |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 627 | return -EAGAIN; |
Jordan Crouse | 4b7fb9b | 2010-05-27 13:40:26 -0600 | [diff] [blame] | 628 | #else |
| 629 | if (remap_pfn_range(vma, vma->vm_start, |
| 630 | (map->offset + offset) >> PAGE_SHIFT, |
| 631 | vma->vm_end - vma->vm_start, |
| 632 | vma->vm_page_prot)) |
| 633 | return -EAGAIN; |
| 634 | #endif |
| 635 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 636 | DRM_DEBUG(" Type = %d; start = 0x%lx, end = 0x%lx," |
Benjamin Herrenschmidt | 41c2e75 | 2009-02-02 16:55:47 +1100 | [diff] [blame] | 637 | " offset = 0x%llx\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 638 | map->type, |
Benjamin Herrenschmidt | 41c2e75 | 2009-02-02 16:55:47 +1100 | [diff] [blame] | 639 | vma->vm_start, vma->vm_end, (unsigned long long)(map->offset + offset)); |
Jordan Crouse | 4b7fb9b | 2010-05-27 13:40:26 -0600 | [diff] [blame] | 640 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 641 | vma->vm_ops = &drm_vm_ops; |
| 642 | break; |
Dave Airlie | 2d0f9ea | 2005-07-10 14:34:13 +1000 | [diff] [blame] | 643 | case _DRM_CONSISTENT: |
Hugh Dickins | 3831587 | 2007-03-24 17:55:16 +1100 | [diff] [blame] | 644 | /* Consistent memory is really like shared memory. But |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 645 | * it's allocated in a different way, so avoid fault */ |
Hugh Dickins | 3831587 | 2007-03-24 17:55:16 +1100 | [diff] [blame] | 646 | if (remap_pfn_range(vma, vma->vm_start, |
| 647 | page_to_pfn(virt_to_page(map->handle)), |
| 648 | vma->vm_end - vma->vm_start, vma->vm_page_prot)) |
| 649 | return -EAGAIN; |
Benjamin Herrenschmidt | 6876b3b | 2008-03-28 14:23:07 -0700 | [diff] [blame] | 650 | vma->vm_page_prot = drm_dma_prot(map->type, vma); |
Hugh Dickins | 3831587 | 2007-03-24 17:55:16 +1100 | [diff] [blame] | 651 | /* fall through to _DRM_SHM */ |
| 652 | case _DRM_SHM: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 653 | vma->vm_ops = &drm_vm_shm_ops; |
| 654 | vma->vm_private_data = (void *)map; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 655 | /* Don't let this area swap. Change when |
| 656 | DRM_KERNEL advisory is supported. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 657 | vma->vm_flags |= VM_RESERVED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 658 | break; |
| 659 | case _DRM_SCATTER_GATHER: |
| 660 | vma->vm_ops = &drm_vm_sg_ops; |
| 661 | vma->vm_private_data = (void *)map; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 662 | vma->vm_flags |= VM_RESERVED; |
Benjamin Herrenschmidt | 5ff6461 | 2008-04-20 10:26:25 +1000 | [diff] [blame] | 663 | vma->vm_page_prot = drm_dma_prot(map->type, vma); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 664 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | default: |
| 666 | return -EINVAL; /* This should never happen. */ |
| 667 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 668 | vma->vm_flags |= VM_RESERVED; /* Don't swap */ |
Nick Piggin | 2f98735 | 2008-02-02 03:08:53 +0100 | [diff] [blame] | 669 | vma->vm_flags |= VM_DONTEXPAND; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 670 | |
Rob Clark | b06d66b | 2012-05-01 11:04:51 -0500 | [diff] [blame] | 671 | drm_vm_open_locked(dev, vma); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 672 | return 0; |
| 673 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 674 | |
Thomas Hellstrom | d7d8aac | 2007-03-24 17:52:49 +1100 | [diff] [blame] | 675 | int drm_mmap(struct file *filp, struct vm_area_struct *vma) |
| 676 | { |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 677 | struct drm_file *priv = filp->private_data; |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 678 | struct drm_device *dev = priv->minor->dev; |
Thomas Hellstrom | d7d8aac | 2007-03-24 17:52:49 +1100 | [diff] [blame] | 679 | int ret; |
| 680 | |
Dave Airlie | 2c07a21 | 2012-02-20 14:18:07 +0000 | [diff] [blame] | 681 | if (drm_device_is_unplugged(dev)) |
| 682 | return -ENODEV; |
| 683 | |
Thomas Hellstrom | d7d8aac | 2007-03-24 17:52:49 +1100 | [diff] [blame] | 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); |