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> |
David Herrmann | 03decbe | 2014-08-29 12:12:29 +0200 | [diff] [blame] | 38 | #include <linux/seq_file.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | #if defined(__ia64__) |
| 40 | #include <linux/efi.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 41 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | #endif |
David Herrmann | 2791ee8 | 2014-08-29 12:12:33 +0200 | [diff] [blame] | 43 | #include <asm/pgtable.h> |
Ville Syrjälä | 43fc884 | 2015-03-13 14:51:25 +0200 | [diff] [blame] | 44 | #include "drm_internal.h" |
David Herrmann | cc5ea59 | 2014-08-29 12:12:32 +0200 | [diff] [blame] | 45 | #include "drm_legacy.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | |
David Herrmann | 03decbe | 2014-08-29 12:12:29 +0200 | [diff] [blame] | 47 | struct drm_vma_entry { |
| 48 | struct list_head head; |
| 49 | struct vm_area_struct *vma; |
| 50 | pid_t pid; |
| 51 | }; |
| 52 | |
Dave Airlie | c94f702 | 2005-07-07 21:03:38 +1000 | [diff] [blame] | 53 | static void drm_vm_open(struct vm_area_struct *vma); |
| 54 | static void drm_vm_close(struct vm_area_struct *vma); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | |
Andy Lutomirski | ff47eaf | 2013-05-13 23:58:42 +0000 | [diff] [blame] | 56 | static pgprot_t drm_io_prot(struct drm_local_map *map, |
| 57 | struct vm_area_struct *vma) |
Dave Airlie | 5cc7f9a | 2007-02-10 11:53:13 +1100 | [diff] [blame] | 58 | { |
| 59 | pgprot_t tmp = vm_get_page_prot(vma->vm_flags); |
| 60 | |
Benjamin Herrenschmidt | 6bd3110 | 2014-09-04 17:46:45 +1000 | [diff] [blame] | 61 | #if defined(__i386__) || defined(__x86_64__) || defined(__powerpc__) |
Andy Lutomirski | f435046 | 2013-05-13 23:58:43 +0000 | [diff] [blame] | 62 | if (map->type == _DRM_REGISTERS && !(map->flags & _DRM_WRITE_COMBINING)) |
| 63 | tmp = pgprot_noncached(tmp); |
| 64 | else |
| 65 | tmp = pgprot_writecombine(tmp); |
Benjamin Herrenschmidt | 6876b3b | 2008-03-28 14:23:07 -0700 | [diff] [blame] | 66 | #elif defined(__ia64__) |
Dave Airlie | 5cc7f9a | 2007-02-10 11:53:13 +1100 | [diff] [blame] | 67 | if (efi_range_is_wc(vma->vm_start, vma->vm_end - |
| 68 | vma->vm_start)) |
| 69 | tmp = pgprot_writecombine(tmp); |
| 70 | else |
| 71 | tmp = pgprot_noncached(tmp); |
Huacai Chen | 04cf55e | 2012-08-11 09:32:17 +0000 | [diff] [blame] | 72 | #elif defined(__sparc__) || defined(__arm__) || defined(__mips__) |
Benjamin Herrenschmidt | 6876b3b | 2008-03-28 14:23:07 -0700 | [diff] [blame] | 73 | tmp = pgprot_noncached(tmp); |
| 74 | #endif |
| 75 | return tmp; |
| 76 | } |
| 77 | |
| 78 | static pgprot_t drm_dma_prot(uint32_t map_type, struct vm_area_struct *vma) |
| 79 | { |
| 80 | pgprot_t tmp = vm_get_page_prot(vma->vm_flags); |
| 81 | |
| 82 | #if defined(__powerpc__) && defined(CONFIG_NOT_COHERENT_CACHE) |
Benjamin Herrenschmidt | 37035e7 | 2016-06-27 19:00:23 +1000 | [diff] [blame] | 83 | tmp = pgprot_noncached_wc(tmp); |
Dave Airlie | 5cc7f9a | 2007-02-10 11:53:13 +1100 | [diff] [blame] | 84 | #endif |
| 85 | return tmp; |
| 86 | } |
| 87 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | /** |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 89 | * \c fault method for AGP virtual memory. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | * |
| 91 | * \param vma virtual memory area. |
| 92 | * \param address access address. |
| 93 | * \return pointer to the page structure. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 94 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | * Find the right map and if it's AGP memory find the real physical page to |
| 96 | * map, get the page, increment the use count and return it. |
| 97 | */ |
Daniel Vetter | a7fb8a2 | 2015-09-09 16:45:52 +0200 | [diff] [blame] | 98 | #if IS_ENABLED(CONFIG_AGP) |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 99 | 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] | 100 | { |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 101 | struct drm_file *priv = vma->vm_file->private_data; |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 102 | struct drm_device *dev = priv->minor->dev; |
Benjamin Herrenschmidt | f77d390 | 2009-02-02 16:55:46 +1100 | [diff] [blame] | 103 | struct drm_local_map *map = NULL; |
Dave Airlie | 5591051 | 2007-07-11 16:53:40 +1000 | [diff] [blame] | 104 | struct drm_map_list *r_list; |
Dave Airlie | e0be428 | 2007-07-12 10:26:44 +1000 | [diff] [blame] | 105 | struct drm_hash_item *hash; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | |
| 107 | /* |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 108 | * Find the right map |
| 109 | */ |
Daniel Vetter | d990675 | 2013-12-11 11:34:35 +0100 | [diff] [blame] | 110 | if (!dev->agp) |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 111 | goto vm_fault_error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 113 | if (!dev->agp || !dev->agp->cant_use_aperture) |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 114 | goto vm_fault_error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | |
Thomas Hellstrom | 1545085 | 2007-02-08 16:14:05 +1100 | [diff] [blame] | 116 | if (drm_ht_find_item(&dev->map_hash, vma->vm_pgoff, &hash)) |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 117 | goto vm_fault_error; |
Thomas Hellstrom | 8d153f7 | 2006-08-07 22:36:47 +1000 | [diff] [blame] | 118 | |
Dave Airlie | 5591051 | 2007-07-11 16:53:40 +1000 | [diff] [blame] | 119 | r_list = drm_hash_entry(hash, struct drm_map_list, hash); |
Thomas Hellstrom | 8d153f7 | 2006-08-07 22:36:47 +1000 | [diff] [blame] | 120 | map = r_list->map; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | |
| 122 | if (map && map->type == _DRM_AGP) { |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 123 | /* |
| 124 | * Using vm_pgoff as a selector forces us to use this unusual |
| 125 | * addressing scheme. |
| 126 | */ |
Benjamin Herrenschmidt | 41c2e75 | 2009-02-02 16:55:47 +1100 | [diff] [blame] | 127 | resource_size_t offset = (unsigned long)vmf->virtual_address - |
| 128 | vma->vm_start; |
| 129 | resource_size_t baddr = map->offset + offset; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | struct drm_agp_mem *agpmem; |
| 131 | struct page *page; |
| 132 | |
| 133 | #ifdef __alpha__ |
| 134 | /* |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 135 | * Adjust to a bus-relative address |
| 136 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | baddr -= dev->hose->mem_space->start; |
| 138 | #endif |
| 139 | |
| 140 | /* |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 141 | * It's AGP memory - find the real physical page to map |
| 142 | */ |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 143 | list_for_each_entry(agpmem, &dev->agp->memory, head) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | if (agpmem->bound <= baddr && |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 145 | agpmem->bound + agpmem->pages * PAGE_SIZE > baddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | break; |
| 147 | } |
| 148 | |
Dan Carpenter | 161c481 | 2010-08-19 11:39:57 +0200 | [diff] [blame] | 149 | if (&agpmem->head == &dev->agp->memory) |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 150 | goto vm_fault_error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | |
| 152 | /* |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 153 | * Get the page, inc the use count, and return it |
| 154 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | offset = (baddr - agpmem->bound) >> PAGE_SHIFT; |
Dave Airlie | 07613ba | 2009-06-12 14:11:41 +1000 | [diff] [blame] | 156 | page = agpmem->memory->pages[offset]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | get_page(page); |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 158 | vmf->page = page; |
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 | DRM_DEBUG |
Benjamin Herrenschmidt | 41c2e75 | 2009-02-02 16:55:47 +1100 | [diff] [blame] | 161 | ("baddr = 0x%llx page = 0x%p, offset = 0x%llx, count=%d\n", |
| 162 | (unsigned long long)baddr, |
Dave Airlie | 07613ba | 2009-06-12 14:11:41 +1000 | [diff] [blame] | 163 | agpmem->memory->pages[offset], |
Benjamin Herrenschmidt | 41c2e75 | 2009-02-02 16:55:47 +1100 | [diff] [blame] | 164 | (unsigned long long)offset, |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 165 | page_count(page)); |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 166 | return 0; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 167 | } |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 168 | vm_fault_error: |
| 169 | return VM_FAULT_SIGBUS; /* Disallow mremap */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | } |
Daniel Vetter | a7fb8a2 | 2015-09-09 16:45:52 +0200 | [diff] [blame] | 171 | #else |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 172 | 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] | 173 | { |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 174 | return VM_FAULT_SIGBUS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | } |
Daniel Vetter | a7fb8a2 | 2015-09-09 16:45:52 +0200 | [diff] [blame] | 176 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | |
| 178 | /** |
| 179 | * \c nopage method for shared virtual memory. |
| 180 | * |
| 181 | * \param vma virtual memory area. |
| 182 | * \param address access address. |
| 183 | * \return pointer to the page structure. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 184 | * |
Michael Opdenacker | 59c5159 | 2007-05-09 08:57:56 +0200 | [diff] [blame] | 185 | * 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] | 186 | * return it. |
| 187 | */ |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 188 | 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] | 189 | { |
Benjamin Herrenschmidt | f77d390 | 2009-02-02 16:55:46 +1100 | [diff] [blame] | 190 | struct drm_local_map *map = vma->vm_private_data; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 191 | unsigned long offset; |
| 192 | unsigned long i; |
| 193 | struct page *page; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 195 | if (!map) |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 196 | return VM_FAULT_SIGBUS; /* Nothing allocated */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 198 | offset = (unsigned long)vmf->virtual_address - vma->vm_start; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | i = (unsigned long)map->handle + offset; |
Hugh Dickins | 3831587 | 2007-03-24 17:55:16 +1100 | [diff] [blame] | 200 | page = vmalloc_to_page((void *)i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | if (!page) |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 202 | return VM_FAULT_SIGBUS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | get_page(page); |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 204 | vmf->page = page; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 206 | DRM_DEBUG("shm_fault 0x%lx\n", offset); |
| 207 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | } |
| 209 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | /** |
| 211 | * \c close method for shared virtual memory. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 212 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | * \param vma virtual memory area. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 214 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | * Deletes map information if we are the last |
| 216 | * person to close a mapping and it's not in the global maplist. |
| 217 | */ |
Dave Airlie | c94f702 | 2005-07-07 21:03:38 +1000 | [diff] [blame] | 218 | static void drm_vm_shm_close(struct vm_area_struct *vma) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | { |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 220 | struct drm_file *priv = vma->vm_file->private_data; |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 221 | struct drm_device *dev = priv->minor->dev; |
Dave Airlie | 8fc2fdf | 2007-07-11 16:21:47 +1000 | [diff] [blame] | 222 | struct drm_vma_entry *pt, *temp; |
Benjamin Herrenschmidt | f77d390 | 2009-02-02 16:55:46 +1100 | [diff] [blame] | 223 | struct drm_local_map *map; |
Dave Airlie | 5591051 | 2007-07-11 16:53:40 +1000 | [diff] [blame] | 224 | struct drm_map_list *r_list; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | int found_maps = 0; |
| 226 | |
| 227 | DRM_DEBUG("0x%08lx,0x%08lx\n", |
| 228 | vma->vm_start, vma->vm_end - vma->vm_start); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | |
| 230 | map = vma->vm_private_data; |
| 231 | |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 232 | mutex_lock(&dev->struct_mutex); |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 233 | list_for_each_entry_safe(pt, temp, &dev->vmalist, head) { |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 234 | if (pt->vma->vm_private_data == map) |
| 235 | found_maps++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | if (pt->vma == vma) { |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 237 | list_del(&pt->head); |
Eric Anholt | 9a298b2 | 2009-03-24 12:23:04 -0700 | [diff] [blame] | 238 | kfree(pt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | } |
| 240 | } |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 241 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | /* We were the only map that was found */ |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 243 | if (found_maps == 1 && map->flags & _DRM_REMOVABLE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | /* Check to see if we are in the maplist, if we are not, then |
| 245 | * we delete this mappings information. |
| 246 | */ |
| 247 | found_maps = 0; |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 248 | list_for_each_entry(r_list, &dev->maplist, head) { |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 249 | if (r_list->map == map) |
| 250 | found_maps++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | } |
| 252 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 253 | if (!found_maps) { |
Dave Airlie | 9c8da5e | 2005-07-10 15:38:56 +1000 | [diff] [blame] | 254 | drm_dma_handle_t dmah; |
| 255 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | switch (map->type) { |
| 257 | case _DRM_REGISTERS: |
| 258 | case _DRM_FRAME_BUFFER: |
Daniel Vetter | 2818564 | 2013-08-08 15:41:27 +0200 | [diff] [blame] | 259 | arch_phys_wc_del(map->mtrr); |
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; |
Daniel Vetter | 1c96e84 | 2014-09-10 12:43:51 +0200 | [diff] [blame] | 272 | __drm_legacy_pci_free(dev, &dmah); |
Dave Airlie | 2d0f9ea | 2005-07-10 14:34:13 +1000 | [diff] [blame] | 273 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | } |
Eric Anholt | 9a298b2 | 2009-03-24 12:23:04 -0700 | [diff] [blame] | 275 | kfree(map); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | } |
| 277 | } |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 278 | mutex_unlock(&dev->struct_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | } |
| 280 | |
| 281 | /** |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 282 | * \c fault method for DMA virtual memory. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | * |
| 284 | * \param vma virtual memory area. |
| 285 | * \param address access address. |
| 286 | * \return pointer to the page structure. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 287 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | * Determine the page number from the page offset and get it from drm_device_dma::pagelist. |
| 289 | */ |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 290 | 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] | 291 | { |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 292 | struct drm_file *priv = vma->vm_file->private_data; |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 293 | struct drm_device *dev = priv->minor->dev; |
Dave Airlie | cdd55a2 | 2007-07-11 16:32:08 +1000 | [diff] [blame] | 294 | struct drm_device_dma *dma = dev->dma; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 295 | unsigned long offset; |
| 296 | unsigned long page_nr; |
| 297 | struct page *page; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 299 | if (!dma) |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 300 | return VM_FAULT_SIGBUS; /* Error */ |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 301 | if (!dma->pagelist) |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 302 | return VM_FAULT_SIGBUS; /* Nothing allocated */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 304 | offset = (unsigned long)vmf->virtual_address - vma->vm_start; /* vm_[pg]off[set] should be 0 */ |
| 305 | page_nr = offset >> PAGE_SHIFT; /* page_nr could just be vmf->pgoff */ |
Ben Hutchings | e1e7853 | 2013-10-27 21:52:39 +0000 | [diff] [blame] | 306 | page = virt_to_page((void *)dma->pagelist[page_nr]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | |
| 308 | get_page(page); |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 309 | vmf->page = page; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 311 | DRM_DEBUG("dma_fault 0x%lx (page %lu)\n", offset, page_nr); |
| 312 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | } |
| 314 | |
| 315 | /** |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 316 | * \c fault method for scatter-gather virtual memory. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 317 | * |
| 318 | * \param vma virtual memory area. |
| 319 | * \param address access address. |
| 320 | * \return pointer to the page structure. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 321 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | * Determine the map offset from the page offset and get it from drm_sg_mem::pagelist. |
| 323 | */ |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 324 | 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] | 325 | { |
Benjamin Herrenschmidt | f77d390 | 2009-02-02 16:55:46 +1100 | [diff] [blame] | 326 | struct drm_local_map *map = vma->vm_private_data; |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 327 | struct drm_file *priv = vma->vm_file->private_data; |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 328 | struct drm_device *dev = priv->minor->dev; |
Dave Airlie | 5591051 | 2007-07-11 16:53:40 +1000 | [diff] [blame] | 329 | struct drm_sg_mem *entry = dev->sg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | unsigned long offset; |
| 331 | unsigned long map_offset; |
| 332 | unsigned long page_offset; |
| 333 | struct page *page; |
| 334 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 335 | if (!entry) |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 336 | return VM_FAULT_SIGBUS; /* Error */ |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 337 | if (!entry->pagelist) |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 338 | return VM_FAULT_SIGBUS; /* Nothing allocated */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 340 | offset = (unsigned long)vmf->virtual_address - vma->vm_start; |
Dave Airlie | d1f2b55 | 2005-08-05 22:11:22 +1000 | [diff] [blame] | 341 | map_offset = map->offset - (unsigned long)dev->sg->virtual; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | page_offset = (offset >> PAGE_SHIFT) + (map_offset >> PAGE_SHIFT); |
| 343 | page = entry->pagelist[page_offset]; |
| 344 | get_page(page); |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 345 | vmf->page = page; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 347 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | } |
| 349 | |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 350 | 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] | 351 | { |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 352 | return drm_do_vm_fault(vma, vmf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 353 | } |
| 354 | |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 355 | 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] | 356 | { |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 357 | return drm_do_vm_shm_fault(vma, vmf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | } |
| 359 | |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 360 | 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] | 361 | { |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 362 | return drm_do_vm_dma_fault(vma, vmf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | } |
| 364 | |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 365 | 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] | 366 | { |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 367 | return drm_do_vm_sg_fault(vma, vmf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | } |
| 369 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 370 | /** AGP virtual memory operations */ |
Alexey Dobriyan | f0f37e2f | 2009-09-27 22:29:37 +0400 | [diff] [blame] | 371 | static const struct vm_operations_struct drm_vm_ops = { |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 372 | .fault = drm_vm_fault, |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 373 | .open = drm_vm_open, |
| 374 | .close = drm_vm_close, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | }; |
| 376 | |
| 377 | /** Shared virtual memory operations */ |
Alexey Dobriyan | f0f37e2f | 2009-09-27 22:29:37 +0400 | [diff] [blame] | 378 | static const struct vm_operations_struct drm_vm_shm_ops = { |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 379 | .fault = drm_vm_shm_fault, |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 380 | .open = drm_vm_open, |
| 381 | .close = drm_vm_shm_close, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | }; |
| 383 | |
| 384 | /** DMA virtual memory operations */ |
Alexey Dobriyan | f0f37e2f | 2009-09-27 22:29:37 +0400 | [diff] [blame] | 385 | static const struct vm_operations_struct drm_vm_dma_ops = { |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 386 | .fault = drm_vm_dma_fault, |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 387 | .open = drm_vm_open, |
| 388 | .close = drm_vm_close, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | }; |
| 390 | |
| 391 | /** Scatter-gather virtual memory operations */ |
Alexey Dobriyan | f0f37e2f | 2009-09-27 22:29:37 +0400 | [diff] [blame] | 392 | static const struct vm_operations_struct drm_vm_sg_ops = { |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 393 | .fault = drm_vm_sg_fault, |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 394 | .open = drm_vm_open, |
| 395 | .close = drm_vm_close, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 396 | }; |
| 397 | |
Daniel Vetter | f47dbdd | 2016-04-26 19:29:40 +0200 | [diff] [blame] | 398 | static void drm_vm_open_locked(struct drm_device *dev, |
| 399 | struct vm_area_struct *vma) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | { |
Dave Airlie | 8fc2fdf | 2007-07-11 16:21:47 +1000 | [diff] [blame] | 401 | struct drm_vma_entry *vma_entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | |
| 403 | DRM_DEBUG("0x%08lx,0x%08lx\n", |
| 404 | vma->vm_start, vma->vm_end - vma->vm_start); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | |
Eric Anholt | 9a298b2 | 2009-03-24 12:23:04 -0700 | [diff] [blame] | 406 | vma_entry = kmalloc(sizeof(*vma_entry), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | if (vma_entry) { |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 408 | vma_entry->vma = vma; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 409 | vma_entry->pid = current->pid; |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 410 | list_add(&vma_entry->head, &dev->vmalist); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | } |
| 412 | } |
| 413 | |
Thomas Hellstrom | d7d8aac | 2007-03-24 17:52:49 +1100 | [diff] [blame] | 414 | static void drm_vm_open(struct vm_area_struct *vma) |
| 415 | { |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 416 | struct drm_file *priv = vma->vm_file->private_data; |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 417 | struct drm_device *dev = priv->minor->dev; |
Thomas Hellstrom | d7d8aac | 2007-03-24 17:52:49 +1100 | [diff] [blame] | 418 | |
| 419 | mutex_lock(&dev->struct_mutex); |
Rob Clark | b06d66b | 2012-05-01 11:04:51 -0500 | [diff] [blame] | 420 | drm_vm_open_locked(dev, vma); |
Thomas Hellstrom | d7d8aac | 2007-03-24 17:52:49 +1100 | [diff] [blame] | 421 | mutex_unlock(&dev->struct_mutex); |
| 422 | } |
| 423 | |
Daniel Vetter | f47dbdd | 2016-04-26 19:29:40 +0200 | [diff] [blame] | 424 | static void drm_vm_close_locked(struct drm_device *dev, |
| 425 | struct vm_area_struct *vma) |
Chris Wilson | 31dfbc9 | 2010-09-27 21:28:30 +0100 | [diff] [blame] | 426 | { |
Chris Wilson | 31dfbc9 | 2010-09-27 21:28:30 +0100 | [diff] [blame] | 427 | struct drm_vma_entry *pt, *temp; |
| 428 | |
| 429 | DRM_DEBUG("0x%08lx,0x%08lx\n", |
| 430 | vma->vm_start, vma->vm_end - vma->vm_start); |
Chris Wilson | 31dfbc9 | 2010-09-27 21:28:30 +0100 | [diff] [blame] | 431 | |
| 432 | list_for_each_entry_safe(pt, temp, &dev->vmalist, head) { |
| 433 | if (pt->vma == vma) { |
| 434 | list_del(&pt->head); |
| 435 | kfree(pt); |
| 436 | break; |
| 437 | } |
| 438 | } |
| 439 | } |
| 440 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 441 | /** |
| 442 | * \c close method for all virtual memory types. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 443 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 444 | * \param vma virtual memory area. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 445 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | * Search the \p vma private data entry in drm_device::vmalist, unlink it, and |
| 447 | * free it. |
| 448 | */ |
Dave Airlie | c94f702 | 2005-07-07 21:03:38 +1000 | [diff] [blame] | 449 | static void drm_vm_close(struct vm_area_struct *vma) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | { |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 451 | struct drm_file *priv = vma->vm_file->private_data; |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 452 | struct drm_device *dev = priv->minor->dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 454 | mutex_lock(&dev->struct_mutex); |
Rob Clark | b06d66b | 2012-05-01 11:04:51 -0500 | [diff] [blame] | 455 | drm_vm_close_locked(dev, vma); |
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 | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 476 | dev = priv->minor->dev; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 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 | |
Konstantin Khlebnikov | 314e51b | 2012-10-08 16:29:02 -0700 | [diff] [blame] | 504 | vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | |
Rob Clark | b06d66b | 2012-05-01 11:04:51 -0500 | [diff] [blame] | 506 | drm_vm_open_locked(dev, vma); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 507 | return 0; |
| 508 | } |
| 509 | |
Daniel Vetter | cbc60ca | 2010-08-23 22:53:28 +0200 | [diff] [blame] | 510 | 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] | 511 | { |
| 512 | #ifdef __alpha__ |
Jay Estabrook | 82ba3fe | 2011-06-09 18:18:39 -0400 | [diff] [blame] | 513 | return dev->hose->dense_mem_base; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | #else |
| 515 | return 0; |
| 516 | #endif |
| 517 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 518 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | /** |
| 520 | * mmap DMA memory. |
| 521 | * |
Eric Anholt | 6c340ea | 2007-08-25 20:23:09 +1000 | [diff] [blame] | 522 | * \param file_priv DRM file private. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 523 | * \param vma virtual memory area. |
| 524 | * \return zero on success or a negative number on failure. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 525 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | * If the virtual memory area has no offset associated with it then it's a DMA |
| 527 | * area, so calls mmap_dma(). Otherwise searches the map in drm_device::maplist, |
| 528 | * checks that the restricted flag is not set, sets the virtual memory operations |
| 529 | * according to the mapping type and remaps the pages. Finally sets the file |
| 530 | * pointer and calls vm_open(). |
| 531 | */ |
Daniel Vetter | bfbf3c8 | 2014-09-23 15:46:49 +0200 | [diff] [blame] | 532 | 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] | 533 | { |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 534 | struct drm_file *priv = filp->private_data; |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 535 | struct drm_device *dev = priv->minor->dev; |
Benjamin Herrenschmidt | f77d390 | 2009-02-02 16:55:46 +1100 | [diff] [blame] | 536 | struct drm_local_map *map = NULL; |
Benjamin Herrenschmidt | 41c2e75 | 2009-02-02 16:55:47 +1100 | [diff] [blame] | 537 | resource_size_t offset = 0; |
Dave Airlie | e0be428 | 2007-07-12 10:26:44 +1000 | [diff] [blame] | 538 | struct drm_hash_item *hash; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 539 | |
Thomas Hellstrom | 1545085 | 2007-02-08 16:14:05 +1100 | [diff] [blame] | 540 | DRM_DEBUG("start = 0x%lx, end = 0x%lx, page offset = 0x%lx\n", |
| 541 | vma->vm_start, vma->vm_end, vma->vm_pgoff); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 543 | if (!priv->authenticated) |
| 544 | return -EACCES; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 545 | |
| 546 | /* We check for "dma". On Apple's UniNorth, it's valid to have |
| 547 | * the AGP mapped at physical address 0 |
| 548 | * --BenH. |
| 549 | */ |
Thomas Hellstrom | 1545085 | 2007-02-08 16:14:05 +1100 | [diff] [blame] | 550 | if (!vma->vm_pgoff |
Daniel Vetter | a7fb8a2 | 2015-09-09 16:45:52 +0200 | [diff] [blame] | 551 | #if IS_ENABLED(CONFIG_AGP) |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 552 | && (!dev->agp |
| 553 | || dev->agp->agp_info.device->vendor != PCI_VENDOR_ID_APPLE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | #endif |
| 555 | ) |
| 556 | return drm_mmap_dma(filp, vma); |
| 557 | |
Thomas Hellstrom | 1545085 | 2007-02-08 16:14:05 +1100 | [diff] [blame] | 558 | if (drm_ht_find_item(&dev->map_hash, vma->vm_pgoff, &hash)) { |
Thomas Hellstrom | 8d153f7 | 2006-08-07 22:36:47 +1000 | [diff] [blame] | 559 | DRM_ERROR("Could not find map\n"); |
| 560 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | } |
| 562 | |
Dave Airlie | 5591051 | 2007-07-11 16:53:40 +1000 | [diff] [blame] | 563 | map = drm_hash_entry(hash, struct drm_map_list, hash)->map; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 564 | if (!map || ((map->flags & _DRM_RESTRICTED) && !capable(CAP_SYS_ADMIN))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 565 | return -EPERM; |
| 566 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 567 | /* Check for valid size. */ |
Dave Airlie | 54ba2f7 | 2007-02-10 12:07:47 +1100 | [diff] [blame] | 568 | if (map->size < vma->vm_end - vma->vm_start) |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 569 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | |
| 571 | if (!capable(CAP_SYS_ADMIN) && (map->flags & _DRM_READ_ONLY)) { |
| 572 | vma->vm_flags &= ~(VM_WRITE | VM_MAYWRITE); |
| 573 | #if defined(__i386__) || defined(__x86_64__) |
| 574 | pgprot_val(vma->vm_page_prot) &= ~_PAGE_RW; |
| 575 | #else |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 576 | /* Ye gads this is ugly. With more thought |
| 577 | we could move this up higher and use |
| 578 | `protection_map' instead. */ |
| 579 | vma->vm_page_prot = |
| 580 | __pgprot(pte_val |
| 581 | (pte_wrprotect |
| 582 | (__pte(pgprot_val(vma->vm_page_prot))))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 583 | #endif |
| 584 | } |
| 585 | |
| 586 | switch (map->type) { |
Jordan Crouse | 4b7fb9b | 2010-05-27 13:40:26 -0600 | [diff] [blame] | 587 | #if !defined(__arm__) |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 588 | case _DRM_AGP: |
Daniel Vetter | d990675 | 2013-12-11 11:34:35 +0100 | [diff] [blame] | 589 | if (dev->agp && dev->agp->cant_use_aperture) { |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 590 | /* |
| 591 | * On some platforms we can't talk to bus dma address from the CPU, so for |
| 592 | * 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] | 593 | * pages and mappings in fault() |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 594 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 595 | #if defined(__powerpc__) |
Benjamin Herrenschmidt | 37035e7 | 2016-06-27 19:00:23 +1000 | [diff] [blame] | 596 | vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 597 | #endif |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 598 | vma->vm_ops = &drm_vm_ops; |
| 599 | break; |
| 600 | } |
| 601 | /* fall through to _DRM_FRAME_BUFFER... */ |
Jordan Crouse | 4b7fb9b | 2010-05-27 13:40:26 -0600 | [diff] [blame] | 602 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | case _DRM_FRAME_BUFFER: |
| 604 | case _DRM_REGISTERS: |
Daniel Vetter | cbc60ca | 2010-08-23 22:53:28 +0200 | [diff] [blame] | 605 | offset = drm_core_get_reg_ofs(dev); |
Andy Lutomirski | ff47eaf | 2013-05-13 23:58:42 +0000 | [diff] [blame] | 606 | vma->vm_page_prot = drm_io_prot(map, vma); |
Dave Airlie | 9e9c132 | 2007-03-24 17:57:54 +1100 | [diff] [blame] | 607 | if (io_remap_pfn_range(vma, vma->vm_start, |
| 608 | (map->offset + offset) >> PAGE_SHIFT, |
| 609 | vma->vm_end - vma->vm_start, |
| 610 | vma->vm_page_prot)) |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 611 | return -EAGAIN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 612 | DRM_DEBUG(" Type = %d; start = 0x%lx, end = 0x%lx," |
Benjamin Herrenschmidt | 41c2e75 | 2009-02-02 16:55:47 +1100 | [diff] [blame] | 613 | " offset = 0x%llx\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | map->type, |
Benjamin Herrenschmidt | 41c2e75 | 2009-02-02 16:55:47 +1100 | [diff] [blame] | 615 | vma->vm_start, vma->vm_end, (unsigned long long)(map->offset + offset)); |
Jordan Crouse | 4b7fb9b | 2010-05-27 13:40:26 -0600 | [diff] [blame] | 616 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 617 | vma->vm_ops = &drm_vm_ops; |
| 618 | break; |
Dave Airlie | 2d0f9ea | 2005-07-10 14:34:13 +1000 | [diff] [blame] | 619 | case _DRM_CONSISTENT: |
Hugh Dickins | 3831587 | 2007-03-24 17:55:16 +1100 | [diff] [blame] | 620 | /* Consistent memory is really like shared memory. But |
Nick Piggin | ca0b07d | 2008-02-07 16:20:50 +1000 | [diff] [blame] | 621 | * it's allocated in a different way, so avoid fault */ |
Hugh Dickins | 3831587 | 2007-03-24 17:55:16 +1100 | [diff] [blame] | 622 | if (remap_pfn_range(vma, vma->vm_start, |
| 623 | page_to_pfn(virt_to_page(map->handle)), |
| 624 | vma->vm_end - vma->vm_start, vma->vm_page_prot)) |
| 625 | return -EAGAIN; |
Benjamin Herrenschmidt | 6876b3b | 2008-03-28 14:23:07 -0700 | [diff] [blame] | 626 | vma->vm_page_prot = drm_dma_prot(map->type, vma); |
Hugh Dickins | 3831587 | 2007-03-24 17:55:16 +1100 | [diff] [blame] | 627 | /* fall through to _DRM_SHM */ |
| 628 | case _DRM_SHM: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 629 | vma->vm_ops = &drm_vm_shm_ops; |
| 630 | vma->vm_private_data = (void *)map; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 631 | break; |
| 632 | case _DRM_SCATTER_GATHER: |
| 633 | vma->vm_ops = &drm_vm_sg_ops; |
| 634 | vma->vm_private_data = (void *)map; |
Benjamin Herrenschmidt | 5ff6461 | 2008-04-20 10:26:25 +1000 | [diff] [blame] | 635 | vma->vm_page_prot = drm_dma_prot(map->type, vma); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 636 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 637 | default: |
| 638 | return -EINVAL; /* This should never happen. */ |
| 639 | } |
Konstantin Khlebnikov | 314e51b | 2012-10-08 16:29:02 -0700 | [diff] [blame] | 640 | vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 641 | |
Rob Clark | b06d66b | 2012-05-01 11:04:51 -0500 | [diff] [blame] | 642 | drm_vm_open_locked(dev, vma); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | return 0; |
| 644 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 645 | |
Daniel Vetter | bfbf3c8 | 2014-09-23 15:46:49 +0200 | [diff] [blame] | 646 | int drm_legacy_mmap(struct file *filp, struct vm_area_struct *vma) |
Thomas Hellstrom | d7d8aac | 2007-03-24 17:52:49 +1100 | [diff] [blame] | 647 | { |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 648 | struct drm_file *priv = filp->private_data; |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 649 | struct drm_device *dev = priv->minor->dev; |
Thomas Hellstrom | d7d8aac | 2007-03-24 17:52:49 +1100 | [diff] [blame] | 650 | int ret; |
| 651 | |
Dave Airlie | 2c07a21 | 2012-02-20 14:18:07 +0000 | [diff] [blame] | 652 | if (drm_device_is_unplugged(dev)) |
| 653 | return -ENODEV; |
| 654 | |
Thomas Hellstrom | d7d8aac | 2007-03-24 17:52:49 +1100 | [diff] [blame] | 655 | mutex_lock(&dev->struct_mutex); |
| 656 | ret = drm_mmap_locked(filp, vma); |
| 657 | mutex_unlock(&dev->struct_mutex); |
| 658 | |
| 659 | return ret; |
| 660 | } |
Daniel Vetter | bfbf3c8 | 2014-09-23 15:46:49 +0200 | [diff] [blame] | 661 | EXPORT_SYMBOL(drm_legacy_mmap); |
David Herrmann | 03decbe | 2014-08-29 12:12:29 +0200 | [diff] [blame] | 662 | |
| 663 | void drm_legacy_vma_flush(struct drm_device *dev) |
| 664 | { |
| 665 | struct drm_vma_entry *vma, *vma_temp; |
| 666 | |
| 667 | /* Clear vma list (only needed for legacy drivers) */ |
| 668 | list_for_each_entry_safe(vma, vma_temp, &dev->vmalist, head) { |
| 669 | list_del(&vma->head); |
| 670 | kfree(vma); |
| 671 | } |
| 672 | } |