Thomas Hellstrom | 3a1bd92 | 2006-08-07 21:30:28 +1000 | [diff] [blame] | 1 | /************************************************************************** |
| 2 | * |
| 3 | * Copyright 2006 Tungsten Graphics, Inc., Bismarck, ND., USA. |
| 4 | * All Rights Reserved. |
| 5 | * |
| 6 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 7 | * copy of this software and associated documentation files (the |
| 8 | * "Software"), to deal in the Software without restriction, including |
| 9 | * without limitation the rights to use, copy, modify, merge, publish, |
| 10 | * distribute, sub license, and/or sell copies of the Software, and to |
| 11 | * permit persons to whom the Software is furnished to do so, subject to |
| 12 | * the following conditions: |
| 13 | * |
| 14 | * The above copyright notice and this permission notice (including the |
| 15 | * next paragraph) shall be included in all copies or substantial portions |
| 16 | * of the Software. |
| 17 | * |
| 18 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 19 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 20 | * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL |
| 21 | * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, |
| 22 | * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR |
| 23 | * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE |
| 24 | * USE OR OTHER DEALINGS IN THE SOFTWARE. |
| 25 | * |
| 26 | * |
| 27 | **************************************************************************/ |
| 28 | |
| 29 | /* |
| 30 | * Generic simple memory manager implementation. Intended to be used as a base |
| 31 | * class implementation for more advanced memory managers. |
| 32 | * |
| 33 | * Note that the algorithm used is quite simple and there might be substantial |
| 34 | * performance gains if a smarter free list is implemented. Currently it is just an |
| 35 | * unordered stack of free regions. This could easily be improved if an RB-tree |
| 36 | * is used instead. At least if we expect heavy fragmentation. |
| 37 | * |
| 38 | * Aligned allocations can also see improvement. |
| 39 | * |
| 40 | * Authors: |
Jan Engelhardt | 96de0e2 | 2007-10-19 23:21:04 +0200 | [diff] [blame] | 41 | * Thomas Hellström <thomas-at-tungstengraphics-dot-com> |
Thomas Hellstrom | 3a1bd92 | 2006-08-07 21:30:28 +1000 | [diff] [blame] | 42 | */ |
| 43 | |
David Howells | 760285e | 2012-10-02 18:01:07 +0100 | [diff] [blame] | 44 | #include <drm/drmP.h> |
| 45 | #include <drm/drm_mm.h> |
Thomas Hellstrom | 1d58420 | 2007-01-08 22:25:47 +1100 | [diff] [blame] | 46 | #include <linux/slab.h> |
Dave Airlie | fa8a123 | 2009-08-26 13:13:37 +1000 | [diff] [blame] | 47 | #include <linux/seq_file.h> |
Paul Gortmaker | 2d1a8a4 | 2011-08-30 18:16:33 -0400 | [diff] [blame] | 48 | #include <linux/export.h> |
Thomas Hellstrom | 1d58420 | 2007-01-08 22:25:47 +1100 | [diff] [blame] | 49 | |
Jerome Glisse | 249d604 | 2009-04-08 17:11:16 +0200 | [diff] [blame] | 50 | #define MM_UNUSED_TARGET 4 |
| 51 | |
Jerome Glisse | 249d604 | 2009-04-08 17:11:16 +0200 | [diff] [blame] | 52 | static struct drm_mm_node *drm_mm_kmalloc(struct drm_mm *mm, int atomic) |
Thomas Hellstrom | 1d58420 | 2007-01-08 22:25:47 +1100 | [diff] [blame] | 53 | { |
Dave Airlie | 5591051 | 2007-07-11 16:53:40 +1000 | [diff] [blame] | 54 | struct drm_mm_node *child; |
Thomas Hellstrom | 1d58420 | 2007-01-08 22:25:47 +1100 | [diff] [blame] | 55 | |
Jerome Glisse | 249d604 | 2009-04-08 17:11:16 +0200 | [diff] [blame] | 56 | if (atomic) |
Daniel Vetter | 709ea97 | 2010-07-02 15:02:16 +0100 | [diff] [blame] | 57 | child = kzalloc(sizeof(*child), GFP_ATOMIC); |
Jerome Glisse | 249d604 | 2009-04-08 17:11:16 +0200 | [diff] [blame] | 58 | else |
Daniel Vetter | 709ea97 | 2010-07-02 15:02:16 +0100 | [diff] [blame] | 59 | child = kzalloc(sizeof(*child), GFP_KERNEL); |
Jerome Glisse | 249d604 | 2009-04-08 17:11:16 +0200 | [diff] [blame] | 60 | |
| 61 | if (unlikely(child == NULL)) { |
| 62 | spin_lock(&mm->unused_lock); |
| 63 | if (list_empty(&mm->unused_nodes)) |
| 64 | child = NULL; |
| 65 | else { |
| 66 | child = |
| 67 | list_entry(mm->unused_nodes.next, |
Daniel Vetter | ea7b1dd | 2011-02-18 17:59:12 +0100 | [diff] [blame] | 68 | struct drm_mm_node, node_list); |
| 69 | list_del(&child->node_list); |
Jerome Glisse | 249d604 | 2009-04-08 17:11:16 +0200 | [diff] [blame] | 70 | --mm->num_unused; |
| 71 | } |
| 72 | spin_unlock(&mm->unused_lock); |
| 73 | } |
| 74 | return child; |
| 75 | } |
| 76 | |
Jerome Glisse | a698cf3 | 2009-11-13 20:56:58 +0100 | [diff] [blame] | 77 | /* drm_mm_pre_get() - pre allocate drm_mm_node structure |
| 78 | * drm_mm: memory manager struct we are pre-allocating for |
| 79 | * |
| 80 | * Returns 0 on success or -ENOMEM if allocation fails. |
| 81 | */ |
Jerome Glisse | 249d604 | 2009-04-08 17:11:16 +0200 | [diff] [blame] | 82 | int drm_mm_pre_get(struct drm_mm *mm) |
| 83 | { |
| 84 | struct drm_mm_node *node; |
| 85 | |
| 86 | spin_lock(&mm->unused_lock); |
| 87 | while (mm->num_unused < MM_UNUSED_TARGET) { |
| 88 | spin_unlock(&mm->unused_lock); |
Daniel Vetter | 709ea97 | 2010-07-02 15:02:16 +0100 | [diff] [blame] | 89 | node = kzalloc(sizeof(*node), GFP_KERNEL); |
Jerome Glisse | 249d604 | 2009-04-08 17:11:16 +0200 | [diff] [blame] | 90 | spin_lock(&mm->unused_lock); |
| 91 | |
| 92 | if (unlikely(node == NULL)) { |
| 93 | int ret = (mm->num_unused < 2) ? -ENOMEM : 0; |
| 94 | spin_unlock(&mm->unused_lock); |
| 95 | return ret; |
| 96 | } |
| 97 | ++mm->num_unused; |
Daniel Vetter | ea7b1dd | 2011-02-18 17:59:12 +0100 | [diff] [blame] | 98 | list_add_tail(&node->node_list, &mm->unused_nodes); |
Jerome Glisse | 249d604 | 2009-04-08 17:11:16 +0200 | [diff] [blame] | 99 | } |
| 100 | spin_unlock(&mm->unused_lock); |
| 101 | return 0; |
| 102 | } |
| 103 | EXPORT_SYMBOL(drm_mm_pre_get); |
| 104 | |
Daniel Vetter | 9fc935d | 2011-02-18 17:59:13 +0100 | [diff] [blame] | 105 | static void drm_mm_insert_helper(struct drm_mm_node *hole_node, |
| 106 | struct drm_mm_node *node, |
Chris Wilson | 6b9d89b | 2012-07-10 11:15:23 +0100 | [diff] [blame] | 107 | unsigned long size, unsigned alignment, |
| 108 | unsigned long color) |
Thomas Hellstrom | 3a1bd92 | 2006-08-07 21:30:28 +1000 | [diff] [blame] | 109 | { |
Daniel Vetter | ea7b1dd | 2011-02-18 17:59:12 +0100 | [diff] [blame] | 110 | struct drm_mm *mm = hole_node->mm; |
Daniel Vetter | ea7b1dd | 2011-02-18 17:59:12 +0100 | [diff] [blame] | 111 | unsigned long hole_start = drm_mm_hole_node_start(hole_node); |
| 112 | unsigned long hole_end = drm_mm_hole_node_end(hole_node); |
Chris Wilson | 6b9d89b | 2012-07-10 11:15:23 +0100 | [diff] [blame] | 113 | unsigned long adj_start = hole_start; |
| 114 | unsigned long adj_end = hole_end; |
Daniel Vetter | ea7b1dd | 2011-02-18 17:59:12 +0100 | [diff] [blame] | 115 | |
Chris Wilson | 9e8944a | 2012-11-15 11:32:17 +0000 | [diff] [blame] | 116 | BUG_ON(node->allocated); |
Daniel Vetter | b0b7af1 | 2011-02-18 17:59:14 +0100 | [diff] [blame] | 117 | |
Chris Wilson | 6b9d89b | 2012-07-10 11:15:23 +0100 | [diff] [blame] | 118 | if (mm->color_adjust) |
| 119 | mm->color_adjust(hole_node, color, &adj_start, &adj_end); |
Thomas Hellstrom | 1d58420 | 2007-01-08 22:25:47 +1100 | [diff] [blame] | 120 | |
Chris Wilson | 6b9d89b | 2012-07-10 11:15:23 +0100 | [diff] [blame] | 121 | if (alignment) { |
| 122 | unsigned tmp = adj_start % alignment; |
| 123 | if (tmp) |
| 124 | adj_start += alignment - tmp; |
| 125 | } |
| 126 | |
| 127 | if (adj_start == hole_start) { |
Daniel Vetter | ea7b1dd | 2011-02-18 17:59:12 +0100 | [diff] [blame] | 128 | hole_node->hole_follows = 0; |
Chris Wilson | 6b9d89b | 2012-07-10 11:15:23 +0100 | [diff] [blame] | 129 | list_del(&hole_node->hole_stack); |
| 130 | } |
Thomas Hellstrom | 3a1bd92 | 2006-08-07 21:30:28 +1000 | [diff] [blame] | 131 | |
Chris Wilson | 6b9d89b | 2012-07-10 11:15:23 +0100 | [diff] [blame] | 132 | node->start = adj_start; |
Daniel Vetter | ea7b1dd | 2011-02-18 17:59:12 +0100 | [diff] [blame] | 133 | node->size = size; |
| 134 | node->mm = mm; |
Chris Wilson | 6b9d89b | 2012-07-10 11:15:23 +0100 | [diff] [blame] | 135 | node->color = color; |
Daniel Vetter | b0b7af1 | 2011-02-18 17:59:14 +0100 | [diff] [blame] | 136 | node->allocated = 1; |
Daniel Vetter | ea7b1dd | 2011-02-18 17:59:12 +0100 | [diff] [blame] | 137 | |
| 138 | INIT_LIST_HEAD(&node->hole_stack); |
| 139 | list_add(&node->node_list, &hole_node->node_list); |
| 140 | |
Chris Wilson | 6b9d89b | 2012-07-10 11:15:23 +0100 | [diff] [blame] | 141 | BUG_ON(node->start + node->size > adj_end); |
Daniel Vetter | ea7b1dd | 2011-02-18 17:59:12 +0100 | [diff] [blame] | 142 | |
Chris Wilson | 6b9d89b | 2012-07-10 11:15:23 +0100 | [diff] [blame] | 143 | node->hole_follows = 0; |
Chris Wilson | 9e8944a | 2012-11-15 11:32:17 +0000 | [diff] [blame] | 144 | if (__drm_mm_hole_node_start(node) < hole_end) { |
Daniel Vetter | ea7b1dd | 2011-02-18 17:59:12 +0100 | [diff] [blame] | 145 | list_add(&node->hole_stack, &mm->hole_stack); |
| 146 | node->hole_follows = 1; |
Thomas Hellstrom | 3a1bd92 | 2006-08-07 21:30:28 +1000 | [diff] [blame] | 147 | } |
Daniel Vetter | 9fc935d | 2011-02-18 17:59:13 +0100 | [diff] [blame] | 148 | } |
| 149 | |
Chris Wilson | 5973c7e | 2012-11-15 11:32:16 +0000 | [diff] [blame] | 150 | struct drm_mm_node *drm_mm_create_block(struct drm_mm *mm, |
| 151 | unsigned long start, |
| 152 | unsigned long size, |
| 153 | bool atomic) |
| 154 | { |
| 155 | struct drm_mm_node *hole, *node; |
| 156 | unsigned long end = start + size; |
Chris Wilson | 9e8944a | 2012-11-15 11:32:17 +0000 | [diff] [blame] | 157 | unsigned long hole_start; |
| 158 | unsigned long hole_end; |
Chris Wilson | 5973c7e | 2012-11-15 11:32:16 +0000 | [diff] [blame] | 159 | |
Chris Wilson | 9e8944a | 2012-11-15 11:32:17 +0000 | [diff] [blame] | 160 | drm_mm_for_each_hole(hole, mm, hole_start, hole_end) { |
Chris Wilson | 5973c7e | 2012-11-15 11:32:16 +0000 | [diff] [blame] | 161 | if (hole_start > start || hole_end < end) |
| 162 | continue; |
| 163 | |
| 164 | node = drm_mm_kmalloc(mm, atomic); |
| 165 | if (unlikely(node == NULL)) |
| 166 | return NULL; |
| 167 | |
| 168 | node->start = start; |
| 169 | node->size = size; |
| 170 | node->mm = mm; |
| 171 | node->allocated = 1; |
| 172 | |
| 173 | INIT_LIST_HEAD(&node->hole_stack); |
| 174 | list_add(&node->node_list, &hole->node_list); |
| 175 | |
| 176 | if (start == hole_start) { |
| 177 | hole->hole_follows = 0; |
| 178 | list_del_init(&hole->hole_stack); |
| 179 | } |
| 180 | |
| 181 | node->hole_follows = 0; |
| 182 | if (end != hole_end) { |
| 183 | list_add(&node->hole_stack, &mm->hole_stack); |
| 184 | node->hole_follows = 1; |
| 185 | } |
| 186 | |
| 187 | return node; |
| 188 | } |
| 189 | |
| 190 | WARN(1, "no hole found for block 0x%lx + 0x%lx\n", start, size); |
| 191 | return NULL; |
| 192 | } |
| 193 | EXPORT_SYMBOL(drm_mm_create_block); |
| 194 | |
Daniel Vetter | 9fc935d | 2011-02-18 17:59:13 +0100 | [diff] [blame] | 195 | struct drm_mm_node *drm_mm_get_block_generic(struct drm_mm_node *hole_node, |
| 196 | unsigned long size, |
| 197 | unsigned alignment, |
Chris Wilson | 6b9d89b | 2012-07-10 11:15:23 +0100 | [diff] [blame] | 198 | unsigned long color, |
Daniel Vetter | 9fc935d | 2011-02-18 17:59:13 +0100 | [diff] [blame] | 199 | int atomic) |
| 200 | { |
| 201 | struct drm_mm_node *node; |
| 202 | |
Daniel Vetter | 9fc935d | 2011-02-18 17:59:13 +0100 | [diff] [blame] | 203 | node = drm_mm_kmalloc(hole_node->mm, atomic); |
| 204 | if (unlikely(node == NULL)) |
| 205 | return NULL; |
| 206 | |
Chris Wilson | 6b9d89b | 2012-07-10 11:15:23 +0100 | [diff] [blame] | 207 | drm_mm_insert_helper(hole_node, node, size, alignment, color); |
Thomas Hellstrom | 1d58420 | 2007-01-08 22:25:47 +1100 | [diff] [blame] | 208 | |
Chris Wilson | e6c03c5 | 2009-05-22 14:14:22 +0100 | [diff] [blame] | 209 | return node; |
Thomas Hellstrom | 3a1bd92 | 2006-08-07 21:30:28 +1000 | [diff] [blame] | 210 | } |
Thomas Hellstrom | 89579f7 | 2009-06-17 12:29:56 +0200 | [diff] [blame] | 211 | EXPORT_SYMBOL(drm_mm_get_block_generic); |
Jerome Glisse | 249d604 | 2009-04-08 17:11:16 +0200 | [diff] [blame] | 212 | |
Daniel Vetter | b0b7af1 | 2011-02-18 17:59:14 +0100 | [diff] [blame] | 213 | /** |
| 214 | * Search for free space and insert a preallocated memory node. Returns |
| 215 | * -ENOSPC if no suitable free area is available. The preallocated memory node |
| 216 | * must be cleared. |
| 217 | */ |
Chris Wilson | b810345 | 2012-12-07 20:37:06 +0000 | [diff] [blame] | 218 | int drm_mm_insert_node_generic(struct drm_mm *mm, struct drm_mm_node *node, |
| 219 | unsigned long size, unsigned alignment, |
| 220 | unsigned long color) |
Daniel Vetter | b0b7af1 | 2011-02-18 17:59:14 +0100 | [diff] [blame] | 221 | { |
| 222 | struct drm_mm_node *hole_node; |
| 223 | |
Chris Wilson | b810345 | 2012-12-07 20:37:06 +0000 | [diff] [blame] | 224 | hole_node = drm_mm_search_free_generic(mm, size, alignment, |
| 225 | color, 0); |
Daniel Vetter | b0b7af1 | 2011-02-18 17:59:14 +0100 | [diff] [blame] | 226 | if (!hole_node) |
| 227 | return -ENOSPC; |
| 228 | |
Chris Wilson | b810345 | 2012-12-07 20:37:06 +0000 | [diff] [blame] | 229 | drm_mm_insert_helper(hole_node, node, size, alignment, color); |
Daniel Vetter | b0b7af1 | 2011-02-18 17:59:14 +0100 | [diff] [blame] | 230 | return 0; |
| 231 | } |
Chris Wilson | b810345 | 2012-12-07 20:37:06 +0000 | [diff] [blame] | 232 | EXPORT_SYMBOL(drm_mm_insert_node_generic); |
| 233 | |
| 234 | int drm_mm_insert_node(struct drm_mm *mm, struct drm_mm_node *node, |
| 235 | unsigned long size, unsigned alignment) |
| 236 | { |
| 237 | return drm_mm_insert_node_generic(mm, node, size, alignment, 0); |
| 238 | } |
Daniel Vetter | b0b7af1 | 2011-02-18 17:59:14 +0100 | [diff] [blame] | 239 | EXPORT_SYMBOL(drm_mm_insert_node); |
| 240 | |
Daniel Vetter | 9fc935d | 2011-02-18 17:59:13 +0100 | [diff] [blame] | 241 | static void drm_mm_insert_helper_range(struct drm_mm_node *hole_node, |
| 242 | struct drm_mm_node *node, |
| 243 | unsigned long size, unsigned alignment, |
Chris Wilson | 6b9d89b | 2012-07-10 11:15:23 +0100 | [diff] [blame] | 244 | unsigned long color, |
Daniel Vetter | 9fc935d | 2011-02-18 17:59:13 +0100 | [diff] [blame] | 245 | unsigned long start, unsigned long end) |
Jerome Glisse | a2e68e9 | 2009-12-07 15:52:56 +0100 | [diff] [blame] | 246 | { |
Daniel Vetter | ea7b1dd | 2011-02-18 17:59:12 +0100 | [diff] [blame] | 247 | struct drm_mm *mm = hole_node->mm; |
Daniel Vetter | ea7b1dd | 2011-02-18 17:59:12 +0100 | [diff] [blame] | 248 | unsigned long hole_start = drm_mm_hole_node_start(hole_node); |
| 249 | unsigned long hole_end = drm_mm_hole_node_end(hole_node); |
Chris Wilson | 6b9d89b | 2012-07-10 11:15:23 +0100 | [diff] [blame] | 250 | unsigned long adj_start = hole_start; |
| 251 | unsigned long adj_end = hole_end; |
Jerome Glisse | a2e68e9 | 2009-12-07 15:52:56 +0100 | [diff] [blame] | 252 | |
Daniel Vetter | b0b7af1 | 2011-02-18 17:59:14 +0100 | [diff] [blame] | 253 | BUG_ON(!hole_node->hole_follows || node->allocated); |
| 254 | |
Chris Wilson | 6b9d89b | 2012-07-10 11:15:23 +0100 | [diff] [blame] | 255 | if (mm->color_adjust) |
| 256 | mm->color_adjust(hole_node, color, &adj_start, &adj_end); |
Jerome Glisse | a2e68e9 | 2009-12-07 15:52:56 +0100 | [diff] [blame] | 257 | |
Chris Wilson | 6b9d89b | 2012-07-10 11:15:23 +0100 | [diff] [blame] | 258 | if (adj_start < start) |
| 259 | adj_start = start; |
Daniel Vetter | ea7b1dd | 2011-02-18 17:59:12 +0100 | [diff] [blame] | 260 | |
Chris Wilson | 6b9d89b | 2012-07-10 11:15:23 +0100 | [diff] [blame] | 261 | if (alignment) { |
| 262 | unsigned tmp = adj_start % alignment; |
| 263 | if (tmp) |
| 264 | adj_start += alignment - tmp; |
Jerome Glisse | a2e68e9 | 2009-12-07 15:52:56 +0100 | [diff] [blame] | 265 | } |
| 266 | |
Chris Wilson | 6b9d89b | 2012-07-10 11:15:23 +0100 | [diff] [blame] | 267 | if (adj_start == hole_start) { |
| 268 | hole_node->hole_follows = 0; |
| 269 | list_del(&hole_node->hole_stack); |
| 270 | } |
| 271 | |
| 272 | node->start = adj_start; |
Daniel Vetter | ea7b1dd | 2011-02-18 17:59:12 +0100 | [diff] [blame] | 273 | node->size = size; |
| 274 | node->mm = mm; |
Chris Wilson | 6b9d89b | 2012-07-10 11:15:23 +0100 | [diff] [blame] | 275 | node->color = color; |
Daniel Vetter | b0b7af1 | 2011-02-18 17:59:14 +0100 | [diff] [blame] | 276 | node->allocated = 1; |
Daniel Vetter | ea7b1dd | 2011-02-18 17:59:12 +0100 | [diff] [blame] | 277 | |
| 278 | INIT_LIST_HEAD(&node->hole_stack); |
| 279 | list_add(&node->node_list, &hole_node->node_list); |
| 280 | |
Chris Wilson | 6b9d89b | 2012-07-10 11:15:23 +0100 | [diff] [blame] | 281 | BUG_ON(node->start + node->size > adj_end); |
Daniel Vetter | ea7b1dd | 2011-02-18 17:59:12 +0100 | [diff] [blame] | 282 | BUG_ON(node->start + node->size > end); |
| 283 | |
Chris Wilson | 6b9d89b | 2012-07-10 11:15:23 +0100 | [diff] [blame] | 284 | node->hole_follows = 0; |
Chris Wilson | 9e8944a | 2012-11-15 11:32:17 +0000 | [diff] [blame] | 285 | if (__drm_mm_hole_node_start(node) < hole_end) { |
Daniel Vetter | ea7b1dd | 2011-02-18 17:59:12 +0100 | [diff] [blame] | 286 | list_add(&node->hole_stack, &mm->hole_stack); |
| 287 | node->hole_follows = 1; |
Jerome Glisse | a2e68e9 | 2009-12-07 15:52:56 +0100 | [diff] [blame] | 288 | } |
Daniel Vetter | 9fc935d | 2011-02-18 17:59:13 +0100 | [diff] [blame] | 289 | } |
| 290 | |
| 291 | struct drm_mm_node *drm_mm_get_block_range_generic(struct drm_mm_node *hole_node, |
| 292 | unsigned long size, |
| 293 | unsigned alignment, |
Chris Wilson | 6b9d89b | 2012-07-10 11:15:23 +0100 | [diff] [blame] | 294 | unsigned long color, |
Daniel Vetter | 9fc935d | 2011-02-18 17:59:13 +0100 | [diff] [blame] | 295 | unsigned long start, |
| 296 | unsigned long end, |
| 297 | int atomic) |
| 298 | { |
| 299 | struct drm_mm_node *node; |
| 300 | |
Daniel Vetter | 9fc935d | 2011-02-18 17:59:13 +0100 | [diff] [blame] | 301 | node = drm_mm_kmalloc(hole_node->mm, atomic); |
| 302 | if (unlikely(node == NULL)) |
| 303 | return NULL; |
| 304 | |
Chris Wilson | 6b9d89b | 2012-07-10 11:15:23 +0100 | [diff] [blame] | 305 | drm_mm_insert_helper_range(hole_node, node, size, alignment, color, |
Daniel Vetter | 9fc935d | 2011-02-18 17:59:13 +0100 | [diff] [blame] | 306 | start, end); |
Jerome Glisse | a2e68e9 | 2009-12-07 15:52:56 +0100 | [diff] [blame] | 307 | |
Jerome Glisse | a2e68e9 | 2009-12-07 15:52:56 +0100 | [diff] [blame] | 308 | return node; |
| 309 | } |
| 310 | EXPORT_SYMBOL(drm_mm_get_block_range_generic); |
| 311 | |
Daniel Vetter | b0b7af1 | 2011-02-18 17:59:14 +0100 | [diff] [blame] | 312 | /** |
| 313 | * Search for free space and insert a preallocated memory node. Returns |
| 314 | * -ENOSPC if no suitable free area is available. This is for range |
| 315 | * restricted allocations. The preallocated memory node must be cleared. |
Thomas Hellstrom | 3a1bd92 | 2006-08-07 21:30:28 +1000 | [diff] [blame] | 316 | */ |
Chris Wilson | b810345 | 2012-12-07 20:37:06 +0000 | [diff] [blame] | 317 | int drm_mm_insert_node_in_range_generic(struct drm_mm *mm, struct drm_mm_node *node, |
| 318 | unsigned long size, unsigned alignment, unsigned long color, |
| 319 | unsigned long start, unsigned long end) |
| 320 | { |
| 321 | struct drm_mm_node *hole_node; |
| 322 | |
| 323 | hole_node = drm_mm_search_free_in_range_generic(mm, |
| 324 | size, alignment, color, |
| 325 | start, end, 0); |
| 326 | if (!hole_node) |
| 327 | return -ENOSPC; |
| 328 | |
| 329 | drm_mm_insert_helper_range(hole_node, node, |
| 330 | size, alignment, color, |
| 331 | start, end); |
| 332 | return 0; |
| 333 | } |
| 334 | EXPORT_SYMBOL(drm_mm_insert_node_in_range_generic); |
| 335 | |
Daniel Vetter | b0b7af1 | 2011-02-18 17:59:14 +0100 | [diff] [blame] | 336 | int drm_mm_insert_node_in_range(struct drm_mm *mm, struct drm_mm_node *node, |
| 337 | unsigned long size, unsigned alignment, |
| 338 | unsigned long start, unsigned long end) |
Thomas Hellstrom | 3a1bd92 | 2006-08-07 21:30:28 +1000 | [diff] [blame] | 339 | { |
Chris Wilson | b810345 | 2012-12-07 20:37:06 +0000 | [diff] [blame] | 340 | return drm_mm_insert_node_in_range_generic(mm, node, size, alignment, 0, start, end); |
Daniel Vetter | b0b7af1 | 2011-02-18 17:59:14 +0100 | [diff] [blame] | 341 | } |
| 342 | EXPORT_SYMBOL(drm_mm_insert_node_in_range); |
| 343 | |
| 344 | /** |
| 345 | * Remove a memory node from the allocator. |
| 346 | */ |
| 347 | void drm_mm_remove_node(struct drm_mm_node *node) |
| 348 | { |
Daniel Vetter | ea7b1dd | 2011-02-18 17:59:12 +0100 | [diff] [blame] | 349 | struct drm_mm *mm = node->mm; |
| 350 | struct drm_mm_node *prev_node; |
Thomas Hellstrom | 3a1bd92 | 2006-08-07 21:30:28 +1000 | [diff] [blame] | 351 | |
Daniel Vetter | ea7b1dd | 2011-02-18 17:59:12 +0100 | [diff] [blame] | 352 | BUG_ON(node->scanned_block || node->scanned_prev_free |
| 353 | || node->scanned_next_free); |
Thomas Hellstrom | 3a1bd92 | 2006-08-07 21:30:28 +1000 | [diff] [blame] | 354 | |
Daniel Vetter | ea7b1dd | 2011-02-18 17:59:12 +0100 | [diff] [blame] | 355 | prev_node = |
| 356 | list_entry(node->node_list.prev, struct drm_mm_node, node_list); |
Daniel Vetter | 709ea97 | 2010-07-02 15:02:16 +0100 | [diff] [blame] | 357 | |
Daniel Vetter | ea7b1dd | 2011-02-18 17:59:12 +0100 | [diff] [blame] | 358 | if (node->hole_follows) { |
Chris Wilson | 9e8944a | 2012-11-15 11:32:17 +0000 | [diff] [blame] | 359 | BUG_ON(__drm_mm_hole_node_start(node) == |
| 360 | __drm_mm_hole_node_end(node)); |
Daniel Vetter | ea7b1dd | 2011-02-18 17:59:12 +0100 | [diff] [blame] | 361 | list_del(&node->hole_stack); |
| 362 | } else |
Chris Wilson | 9e8944a | 2012-11-15 11:32:17 +0000 | [diff] [blame] | 363 | BUG_ON(__drm_mm_hole_node_start(node) != |
| 364 | __drm_mm_hole_node_end(node)); |
| 365 | |
Daniel Vetter | ea7b1dd | 2011-02-18 17:59:12 +0100 | [diff] [blame] | 366 | |
| 367 | if (!prev_node->hole_follows) { |
| 368 | prev_node->hole_follows = 1; |
| 369 | list_add(&prev_node->hole_stack, &mm->hole_stack); |
| 370 | } else |
| 371 | list_move(&prev_node->hole_stack, &mm->hole_stack); |
| 372 | |
| 373 | list_del(&node->node_list); |
Daniel Vetter | b0b7af1 | 2011-02-18 17:59:14 +0100 | [diff] [blame] | 374 | node->allocated = 0; |
| 375 | } |
| 376 | EXPORT_SYMBOL(drm_mm_remove_node); |
| 377 | |
| 378 | /* |
| 379 | * Remove a memory node from the allocator and free the allocated struct |
| 380 | * drm_mm_node. Only to be used on a struct drm_mm_node obtained by one of the |
| 381 | * drm_mm_get_block functions. |
| 382 | */ |
| 383 | void drm_mm_put_block(struct drm_mm_node *node) |
| 384 | { |
| 385 | |
| 386 | struct drm_mm *mm = node->mm; |
| 387 | |
| 388 | drm_mm_remove_node(node); |
| 389 | |
Daniel Vetter | ea7b1dd | 2011-02-18 17:59:12 +0100 | [diff] [blame] | 390 | spin_lock(&mm->unused_lock); |
| 391 | if (mm->num_unused < MM_UNUSED_TARGET) { |
| 392 | list_add(&node->node_list, &mm->unused_nodes); |
| 393 | ++mm->num_unused; |
| 394 | } else |
| 395 | kfree(node); |
| 396 | spin_unlock(&mm->unused_lock); |
Thomas Hellstrom | 3a1bd92 | 2006-08-07 21:30:28 +1000 | [diff] [blame] | 397 | } |
Eric Anholt | 673a394 | 2008-07-30 12:06:12 -0700 | [diff] [blame] | 398 | EXPORT_SYMBOL(drm_mm_put_block); |
Thomas Hellstrom | 3a1bd92 | 2006-08-07 21:30:28 +1000 | [diff] [blame] | 399 | |
Daniel Vetter | 7521473 | 2010-08-26 21:44:17 +0200 | [diff] [blame] | 400 | static int check_free_hole(unsigned long start, unsigned long end, |
| 401 | unsigned long size, unsigned alignment) |
Daniel Vetter | 7a6b289 | 2010-07-02 15:02:15 +0100 | [diff] [blame] | 402 | { |
Daniel Vetter | 7521473 | 2010-08-26 21:44:17 +0200 | [diff] [blame] | 403 | if (end - start < size) |
Daniel Vetter | 7a6b289 | 2010-07-02 15:02:15 +0100 | [diff] [blame] | 404 | return 0; |
| 405 | |
| 406 | if (alignment) { |
Daniel Vetter | 7521473 | 2010-08-26 21:44:17 +0200 | [diff] [blame] | 407 | unsigned tmp = start % alignment; |
Daniel Vetter | 7a6b289 | 2010-07-02 15:02:15 +0100 | [diff] [blame] | 408 | if (tmp) |
Chris Wilson | 6b9d89b | 2012-07-10 11:15:23 +0100 | [diff] [blame] | 409 | start += alignment - tmp; |
Daniel Vetter | 7a6b289 | 2010-07-02 15:02:15 +0100 | [diff] [blame] | 410 | } |
| 411 | |
Chris Wilson | 6b9d89b | 2012-07-10 11:15:23 +0100 | [diff] [blame] | 412 | return end >= start + size; |
Daniel Vetter | 7a6b289 | 2010-07-02 15:02:15 +0100 | [diff] [blame] | 413 | } |
| 414 | |
Chris Wilson | 6b9d89b | 2012-07-10 11:15:23 +0100 | [diff] [blame] | 415 | struct drm_mm_node *drm_mm_search_free_generic(const struct drm_mm *mm, |
| 416 | unsigned long size, |
| 417 | unsigned alignment, |
| 418 | unsigned long color, |
| 419 | bool best_match) |
Thomas Hellstrom | 3a1bd92 | 2006-08-07 21:30:28 +1000 | [diff] [blame] | 420 | { |
Dave Airlie | 5591051 | 2007-07-11 16:53:40 +1000 | [diff] [blame] | 421 | struct drm_mm_node *entry; |
| 422 | struct drm_mm_node *best; |
Chris Wilson | 9e8944a | 2012-11-15 11:32:17 +0000 | [diff] [blame] | 423 | unsigned long adj_start; |
| 424 | unsigned long adj_end; |
Thomas Hellstrom | 3a1bd92 | 2006-08-07 21:30:28 +1000 | [diff] [blame] | 425 | unsigned long best_size; |
| 426 | |
Daniel Vetter | 709ea97 | 2010-07-02 15:02:16 +0100 | [diff] [blame] | 427 | BUG_ON(mm->scanned_blocks); |
| 428 | |
Thomas Hellstrom | 3a1bd92 | 2006-08-07 21:30:28 +1000 | [diff] [blame] | 429 | best = NULL; |
| 430 | best_size = ~0UL; |
| 431 | |
Chris Wilson | 9e8944a | 2012-11-15 11:32:17 +0000 | [diff] [blame] | 432 | drm_mm_for_each_hole(entry, mm, adj_start, adj_end) { |
Chris Wilson | 6b9d89b | 2012-07-10 11:15:23 +0100 | [diff] [blame] | 433 | if (mm->color_adjust) { |
| 434 | mm->color_adjust(entry, color, &adj_start, &adj_end); |
| 435 | if (adj_end <= adj_start) |
| 436 | continue; |
| 437 | } |
| 438 | |
Chris Wilson | 6b9d89b | 2012-07-10 11:15:23 +0100 | [diff] [blame] | 439 | if (!check_free_hole(adj_start, adj_end, size, alignment)) |
Thomas Hellstrom | 1d58420 | 2007-01-08 22:25:47 +1100 | [diff] [blame] | 440 | continue; |
| 441 | |
Daniel Vetter | 7a6b289 | 2010-07-02 15:02:15 +0100 | [diff] [blame] | 442 | if (!best_match) |
| 443 | return entry; |
Thomas Hellstrom | 1d58420 | 2007-01-08 22:25:47 +1100 | [diff] [blame] | 444 | |
Daniel Vetter | 7a6b289 | 2010-07-02 15:02:15 +0100 | [diff] [blame] | 445 | if (entry->size < best_size) { |
| 446 | best = entry; |
| 447 | best_size = entry->size; |
Thomas Hellstrom | 3a1bd92 | 2006-08-07 21:30:28 +1000 | [diff] [blame] | 448 | } |
| 449 | } |
| 450 | |
| 451 | return best; |
| 452 | } |
Chris Wilson | 6b9d89b | 2012-07-10 11:15:23 +0100 | [diff] [blame] | 453 | EXPORT_SYMBOL(drm_mm_search_free_generic); |
Thomas Hellstrom | 3a1bd92 | 2006-08-07 21:30:28 +1000 | [diff] [blame] | 454 | |
Chris Wilson | 6b9d89b | 2012-07-10 11:15:23 +0100 | [diff] [blame] | 455 | struct drm_mm_node *drm_mm_search_free_in_range_generic(const struct drm_mm *mm, |
| 456 | unsigned long size, |
| 457 | unsigned alignment, |
| 458 | unsigned long color, |
| 459 | unsigned long start, |
| 460 | unsigned long end, |
| 461 | bool best_match) |
Jerome Glisse | a2e68e9 | 2009-12-07 15:52:56 +0100 | [diff] [blame] | 462 | { |
Jerome Glisse | a2e68e9 | 2009-12-07 15:52:56 +0100 | [diff] [blame] | 463 | struct drm_mm_node *entry; |
| 464 | struct drm_mm_node *best; |
Chris Wilson | 9e8944a | 2012-11-15 11:32:17 +0000 | [diff] [blame] | 465 | unsigned long adj_start; |
| 466 | unsigned long adj_end; |
Jerome Glisse | a2e68e9 | 2009-12-07 15:52:56 +0100 | [diff] [blame] | 467 | unsigned long best_size; |
Jerome Glisse | a2e68e9 | 2009-12-07 15:52:56 +0100 | [diff] [blame] | 468 | |
Daniel Vetter | 709ea97 | 2010-07-02 15:02:16 +0100 | [diff] [blame] | 469 | BUG_ON(mm->scanned_blocks); |
| 470 | |
Jerome Glisse | a2e68e9 | 2009-12-07 15:52:56 +0100 | [diff] [blame] | 471 | best = NULL; |
| 472 | best_size = ~0UL; |
| 473 | |
Chris Wilson | 9e8944a | 2012-11-15 11:32:17 +0000 | [diff] [blame] | 474 | drm_mm_for_each_hole(entry, mm, adj_start, adj_end) { |
| 475 | if (adj_start < start) |
| 476 | adj_start = start; |
| 477 | if (adj_end > end) |
| 478 | adj_end = end; |
Chris Wilson | 6b9d89b | 2012-07-10 11:15:23 +0100 | [diff] [blame] | 479 | |
| 480 | if (mm->color_adjust) { |
| 481 | mm->color_adjust(entry, color, &adj_start, &adj_end); |
| 482 | if (adj_end <= adj_start) |
| 483 | continue; |
| 484 | } |
| 485 | |
Daniel Vetter | 7521473 | 2010-08-26 21:44:17 +0200 | [diff] [blame] | 486 | if (!check_free_hole(adj_start, adj_end, size, alignment)) |
Daniel Vetter | 7a6b289 | 2010-07-02 15:02:15 +0100 | [diff] [blame] | 487 | continue; |
Jerome Glisse | a2e68e9 | 2009-12-07 15:52:56 +0100 | [diff] [blame] | 488 | |
Daniel Vetter | 7a6b289 | 2010-07-02 15:02:15 +0100 | [diff] [blame] | 489 | if (!best_match) |
| 490 | return entry; |
Jerome Glisse | a2e68e9 | 2009-12-07 15:52:56 +0100 | [diff] [blame] | 491 | |
Daniel Vetter | 7a6b289 | 2010-07-02 15:02:15 +0100 | [diff] [blame] | 492 | if (entry->size < best_size) { |
| 493 | best = entry; |
| 494 | best_size = entry->size; |
Jerome Glisse | a2e68e9 | 2009-12-07 15:52:56 +0100 | [diff] [blame] | 495 | } |
| 496 | } |
| 497 | |
| 498 | return best; |
| 499 | } |
Chris Wilson | 6b9d89b | 2012-07-10 11:15:23 +0100 | [diff] [blame] | 500 | EXPORT_SYMBOL(drm_mm_search_free_in_range_generic); |
Jerome Glisse | a2e68e9 | 2009-12-07 15:52:56 +0100 | [diff] [blame] | 501 | |
Daniel Vetter | 709ea97 | 2010-07-02 15:02:16 +0100 | [diff] [blame] | 502 | /** |
Daniel Vetter | b0b7af1 | 2011-02-18 17:59:14 +0100 | [diff] [blame] | 503 | * Moves an allocation. To be used with embedded struct drm_mm_node. |
| 504 | */ |
| 505 | void drm_mm_replace_node(struct drm_mm_node *old, struct drm_mm_node *new) |
| 506 | { |
| 507 | list_replace(&old->node_list, &new->node_list); |
Daniel Vetter | 2bbd449 | 2011-05-06 23:47:53 +0200 | [diff] [blame] | 508 | list_replace(&old->hole_stack, &new->hole_stack); |
Daniel Vetter | b0b7af1 | 2011-02-18 17:59:14 +0100 | [diff] [blame] | 509 | new->hole_follows = old->hole_follows; |
| 510 | new->mm = old->mm; |
| 511 | new->start = old->start; |
| 512 | new->size = old->size; |
Chris Wilson | 6b9d89b | 2012-07-10 11:15:23 +0100 | [diff] [blame] | 513 | new->color = old->color; |
Daniel Vetter | b0b7af1 | 2011-02-18 17:59:14 +0100 | [diff] [blame] | 514 | |
| 515 | old->allocated = 0; |
| 516 | new->allocated = 1; |
| 517 | } |
| 518 | EXPORT_SYMBOL(drm_mm_replace_node); |
| 519 | |
| 520 | /** |
Daniel Vetter | 709ea97 | 2010-07-02 15:02:16 +0100 | [diff] [blame] | 521 | * Initializa lru scanning. |
| 522 | * |
| 523 | * This simply sets up the scanning routines with the parameters for the desired |
| 524 | * hole. |
| 525 | * |
| 526 | * Warning: As long as the scan list is non-empty, no other operations than |
| 527 | * adding/removing nodes to/from the scan list are allowed. |
| 528 | */ |
Chris Wilson | 6b9d89b | 2012-07-10 11:15:23 +0100 | [diff] [blame] | 529 | void drm_mm_init_scan(struct drm_mm *mm, |
| 530 | unsigned long size, |
| 531 | unsigned alignment, |
| 532 | unsigned long color) |
Daniel Vetter | 709ea97 | 2010-07-02 15:02:16 +0100 | [diff] [blame] | 533 | { |
Chris Wilson | 6b9d89b | 2012-07-10 11:15:23 +0100 | [diff] [blame] | 534 | mm->scan_color = color; |
Daniel Vetter | 709ea97 | 2010-07-02 15:02:16 +0100 | [diff] [blame] | 535 | mm->scan_alignment = alignment; |
| 536 | mm->scan_size = size; |
| 537 | mm->scanned_blocks = 0; |
| 538 | mm->scan_hit_start = 0; |
| 539 | mm->scan_hit_size = 0; |
Daniel Vetter | d935cc6 | 2010-09-16 15:13:11 +0200 | [diff] [blame] | 540 | mm->scan_check_range = 0; |
Daniel Vetter | ae0cec2 | 2011-02-18 17:59:15 +0100 | [diff] [blame] | 541 | mm->prev_scanned_node = NULL; |
Daniel Vetter | 709ea97 | 2010-07-02 15:02:16 +0100 | [diff] [blame] | 542 | } |
| 543 | EXPORT_SYMBOL(drm_mm_init_scan); |
| 544 | |
| 545 | /** |
Daniel Vetter | d935cc6 | 2010-09-16 15:13:11 +0200 | [diff] [blame] | 546 | * Initializa lru scanning. |
| 547 | * |
| 548 | * This simply sets up the scanning routines with the parameters for the desired |
| 549 | * hole. This version is for range-restricted scans. |
| 550 | * |
| 551 | * Warning: As long as the scan list is non-empty, no other operations than |
| 552 | * adding/removing nodes to/from the scan list are allowed. |
| 553 | */ |
Chris Wilson | 6b9d89b | 2012-07-10 11:15:23 +0100 | [diff] [blame] | 554 | void drm_mm_init_scan_with_range(struct drm_mm *mm, |
| 555 | unsigned long size, |
Daniel Vetter | d935cc6 | 2010-09-16 15:13:11 +0200 | [diff] [blame] | 556 | unsigned alignment, |
Chris Wilson | 6b9d89b | 2012-07-10 11:15:23 +0100 | [diff] [blame] | 557 | unsigned long color, |
Daniel Vetter | d935cc6 | 2010-09-16 15:13:11 +0200 | [diff] [blame] | 558 | unsigned long start, |
| 559 | unsigned long end) |
| 560 | { |
Chris Wilson | 6b9d89b | 2012-07-10 11:15:23 +0100 | [diff] [blame] | 561 | mm->scan_color = color; |
Daniel Vetter | d935cc6 | 2010-09-16 15:13:11 +0200 | [diff] [blame] | 562 | mm->scan_alignment = alignment; |
| 563 | mm->scan_size = size; |
| 564 | mm->scanned_blocks = 0; |
| 565 | mm->scan_hit_start = 0; |
| 566 | mm->scan_hit_size = 0; |
| 567 | mm->scan_start = start; |
| 568 | mm->scan_end = end; |
| 569 | mm->scan_check_range = 1; |
Daniel Vetter | ae0cec2 | 2011-02-18 17:59:15 +0100 | [diff] [blame] | 570 | mm->prev_scanned_node = NULL; |
Daniel Vetter | d935cc6 | 2010-09-16 15:13:11 +0200 | [diff] [blame] | 571 | } |
| 572 | EXPORT_SYMBOL(drm_mm_init_scan_with_range); |
| 573 | |
| 574 | /** |
Daniel Vetter | 709ea97 | 2010-07-02 15:02:16 +0100 | [diff] [blame] | 575 | * Add a node to the scan list that might be freed to make space for the desired |
| 576 | * hole. |
| 577 | * |
| 578 | * Returns non-zero, if a hole has been found, zero otherwise. |
| 579 | */ |
| 580 | int drm_mm_scan_add_block(struct drm_mm_node *node) |
| 581 | { |
| 582 | struct drm_mm *mm = node->mm; |
Daniel Vetter | ea7b1dd | 2011-02-18 17:59:12 +0100 | [diff] [blame] | 583 | struct drm_mm_node *prev_node; |
| 584 | unsigned long hole_start, hole_end; |
Daniel Vetter | d935cc6 | 2010-09-16 15:13:11 +0200 | [diff] [blame] | 585 | unsigned long adj_start; |
| 586 | unsigned long adj_end; |
Daniel Vetter | 709ea97 | 2010-07-02 15:02:16 +0100 | [diff] [blame] | 587 | |
| 588 | mm->scanned_blocks++; |
| 589 | |
Daniel Vetter | ea7b1dd | 2011-02-18 17:59:12 +0100 | [diff] [blame] | 590 | BUG_ON(node->scanned_block); |
Daniel Vetter | 709ea97 | 2010-07-02 15:02:16 +0100 | [diff] [blame] | 591 | node->scanned_block = 1; |
Daniel Vetter | 709ea97 | 2010-07-02 15:02:16 +0100 | [diff] [blame] | 592 | |
Daniel Vetter | ea7b1dd | 2011-02-18 17:59:12 +0100 | [diff] [blame] | 593 | prev_node = list_entry(node->node_list.prev, struct drm_mm_node, |
| 594 | node_list); |
Daniel Vetter | 709ea97 | 2010-07-02 15:02:16 +0100 | [diff] [blame] | 595 | |
Daniel Vetter | ea7b1dd | 2011-02-18 17:59:12 +0100 | [diff] [blame] | 596 | node->scanned_preceeds_hole = prev_node->hole_follows; |
| 597 | prev_node->hole_follows = 1; |
| 598 | list_del(&node->node_list); |
| 599 | node->node_list.prev = &prev_node->node_list; |
Daniel Vetter | ae0cec2 | 2011-02-18 17:59:15 +0100 | [diff] [blame] | 600 | node->node_list.next = &mm->prev_scanned_node->node_list; |
| 601 | mm->prev_scanned_node = node; |
Daniel Vetter | 709ea97 | 2010-07-02 15:02:16 +0100 | [diff] [blame] | 602 | |
Daniel Vetter | ea7b1dd | 2011-02-18 17:59:12 +0100 | [diff] [blame] | 603 | hole_start = drm_mm_hole_node_start(prev_node); |
| 604 | hole_end = drm_mm_hole_node_end(prev_node); |
Chris Wilson | 6b9d89b | 2012-07-10 11:15:23 +0100 | [diff] [blame] | 605 | |
| 606 | adj_start = hole_start; |
| 607 | adj_end = hole_end; |
| 608 | |
| 609 | if (mm->color_adjust) |
| 610 | mm->color_adjust(prev_node, mm->scan_color, &adj_start, &adj_end); |
| 611 | |
Daniel Vetter | d935cc6 | 2010-09-16 15:13:11 +0200 | [diff] [blame] | 612 | if (mm->scan_check_range) { |
Chris Wilson | 6b9d89b | 2012-07-10 11:15:23 +0100 | [diff] [blame] | 613 | if (adj_start < mm->scan_start) |
| 614 | adj_start = mm->scan_start; |
| 615 | if (adj_end > mm->scan_end) |
| 616 | adj_end = mm->scan_end; |
Daniel Vetter | d935cc6 | 2010-09-16 15:13:11 +0200 | [diff] [blame] | 617 | } |
| 618 | |
Chris Wilson | 6b9d89b | 2012-07-10 11:15:23 +0100 | [diff] [blame] | 619 | if (check_free_hole(adj_start, adj_end, |
Daniel Vetter | 7521473 | 2010-08-26 21:44:17 +0200 | [diff] [blame] | 620 | mm->scan_size, mm->scan_alignment)) { |
Daniel Vetter | ea7b1dd | 2011-02-18 17:59:12 +0100 | [diff] [blame] | 621 | mm->scan_hit_start = hole_start; |
| 622 | mm->scan_hit_size = hole_end; |
Daniel Vetter | 709ea97 | 2010-07-02 15:02:16 +0100 | [diff] [blame] | 623 | |
| 624 | return 1; |
| 625 | } |
| 626 | |
| 627 | return 0; |
| 628 | } |
| 629 | EXPORT_SYMBOL(drm_mm_scan_add_block); |
| 630 | |
| 631 | /** |
| 632 | * Remove a node from the scan list. |
| 633 | * |
| 634 | * Nodes _must_ be removed in the exact same order from the scan list as they |
| 635 | * have been added, otherwise the internal state of the memory manager will be |
| 636 | * corrupted. |
| 637 | * |
| 638 | * When the scan list is empty, the selected memory nodes can be freed. An |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 639 | * immediately following drm_mm_search_free with best_match = 0 will then return |
Daniel Vetter | 709ea97 | 2010-07-02 15:02:16 +0100 | [diff] [blame] | 640 | * the just freed block (because its at the top of the free_stack list). |
| 641 | * |
| 642 | * Returns one if this block should be evicted, zero otherwise. Will always |
| 643 | * return zero when no hole has been found. |
| 644 | */ |
| 645 | int drm_mm_scan_remove_block(struct drm_mm_node *node) |
| 646 | { |
| 647 | struct drm_mm *mm = node->mm; |
Daniel Vetter | ea7b1dd | 2011-02-18 17:59:12 +0100 | [diff] [blame] | 648 | struct drm_mm_node *prev_node; |
Daniel Vetter | 709ea97 | 2010-07-02 15:02:16 +0100 | [diff] [blame] | 649 | |
| 650 | mm->scanned_blocks--; |
| 651 | |
| 652 | BUG_ON(!node->scanned_block); |
| 653 | node->scanned_block = 0; |
Daniel Vetter | 709ea97 | 2010-07-02 15:02:16 +0100 | [diff] [blame] | 654 | |
Daniel Vetter | ea7b1dd | 2011-02-18 17:59:12 +0100 | [diff] [blame] | 655 | prev_node = list_entry(node->node_list.prev, struct drm_mm_node, |
| 656 | node_list); |
Daniel Vetter | 709ea97 | 2010-07-02 15:02:16 +0100 | [diff] [blame] | 657 | |
Daniel Vetter | ea7b1dd | 2011-02-18 17:59:12 +0100 | [diff] [blame] | 658 | prev_node->hole_follows = node->scanned_preceeds_hole; |
| 659 | INIT_LIST_HEAD(&node->node_list); |
| 660 | list_add(&node->node_list, &prev_node->node_list); |
Daniel Vetter | 709ea97 | 2010-07-02 15:02:16 +0100 | [diff] [blame] | 661 | |
| 662 | /* Only need to check for containement because start&size for the |
| 663 | * complete resulting free block (not just the desired part) is |
| 664 | * stored. */ |
| 665 | if (node->start >= mm->scan_hit_start && |
| 666 | node->start + node->size |
| 667 | <= mm->scan_hit_start + mm->scan_hit_size) { |
| 668 | return 1; |
| 669 | } |
| 670 | |
| 671 | return 0; |
| 672 | } |
| 673 | EXPORT_SYMBOL(drm_mm_scan_remove_block); |
| 674 | |
Dave Airlie | 5591051 | 2007-07-11 16:53:40 +1000 | [diff] [blame] | 675 | int drm_mm_clean(struct drm_mm * mm) |
Thomas Hellstrom | 1d58420 | 2007-01-08 22:25:47 +1100 | [diff] [blame] | 676 | { |
Daniel Vetter | ea7b1dd | 2011-02-18 17:59:12 +0100 | [diff] [blame] | 677 | struct list_head *head = &mm->head_node.node_list; |
Thomas Hellstrom | 1d58420 | 2007-01-08 22:25:47 +1100 | [diff] [blame] | 678 | |
| 679 | return (head->next->next == head); |
| 680 | } |
Jerome Glisse | 249d604 | 2009-04-08 17:11:16 +0200 | [diff] [blame] | 681 | EXPORT_SYMBOL(drm_mm_clean); |
Thomas Hellstrom | 1d58420 | 2007-01-08 22:25:47 +1100 | [diff] [blame] | 682 | |
Dave Airlie | 5591051 | 2007-07-11 16:53:40 +1000 | [diff] [blame] | 683 | int drm_mm_init(struct drm_mm * mm, unsigned long start, unsigned long size) |
Thomas Hellstrom | 3a1bd92 | 2006-08-07 21:30:28 +1000 | [diff] [blame] | 684 | { |
Daniel Vetter | ea7b1dd | 2011-02-18 17:59:12 +0100 | [diff] [blame] | 685 | INIT_LIST_HEAD(&mm->hole_stack); |
Jerome Glisse | 249d604 | 2009-04-08 17:11:16 +0200 | [diff] [blame] | 686 | INIT_LIST_HEAD(&mm->unused_nodes); |
| 687 | mm->num_unused = 0; |
Daniel Vetter | 709ea97 | 2010-07-02 15:02:16 +0100 | [diff] [blame] | 688 | mm->scanned_blocks = 0; |
Jerome Glisse | 249d604 | 2009-04-08 17:11:16 +0200 | [diff] [blame] | 689 | spin_lock_init(&mm->unused_lock); |
Thomas Hellstrom | 3a1bd92 | 2006-08-07 21:30:28 +1000 | [diff] [blame] | 690 | |
Daniel Vetter | ea7b1dd | 2011-02-18 17:59:12 +0100 | [diff] [blame] | 691 | /* Clever trick to avoid a special case in the free hole tracking. */ |
| 692 | INIT_LIST_HEAD(&mm->head_node.node_list); |
| 693 | INIT_LIST_HEAD(&mm->head_node.hole_stack); |
| 694 | mm->head_node.hole_follows = 1; |
| 695 | mm->head_node.scanned_block = 0; |
| 696 | mm->head_node.scanned_prev_free = 0; |
| 697 | mm->head_node.scanned_next_free = 0; |
| 698 | mm->head_node.mm = mm; |
| 699 | mm->head_node.start = start + size; |
| 700 | mm->head_node.size = start - mm->head_node.start; |
| 701 | list_add_tail(&mm->head_node.hole_stack, &mm->hole_stack); |
| 702 | |
Chris Wilson | 6b9d89b | 2012-07-10 11:15:23 +0100 | [diff] [blame] | 703 | mm->color_adjust = NULL; |
| 704 | |
Daniel Vetter | ea7b1dd | 2011-02-18 17:59:12 +0100 | [diff] [blame] | 705 | return 0; |
Thomas Hellstrom | 3a1bd92 | 2006-08-07 21:30:28 +1000 | [diff] [blame] | 706 | } |
Eric Anholt | 673a394 | 2008-07-30 12:06:12 -0700 | [diff] [blame] | 707 | EXPORT_SYMBOL(drm_mm_init); |
Thomas Hellstrom | 3a1bd92 | 2006-08-07 21:30:28 +1000 | [diff] [blame] | 708 | |
Dave Airlie | 5591051 | 2007-07-11 16:53:40 +1000 | [diff] [blame] | 709 | void drm_mm_takedown(struct drm_mm * mm) |
Thomas Hellstrom | 3a1bd92 | 2006-08-07 21:30:28 +1000 | [diff] [blame] | 710 | { |
Daniel Vetter | ea7b1dd | 2011-02-18 17:59:12 +0100 | [diff] [blame] | 711 | struct drm_mm_node *entry, *next; |
Thomas Hellstrom | 3a1bd92 | 2006-08-07 21:30:28 +1000 | [diff] [blame] | 712 | |
Daniel Vetter | ea7b1dd | 2011-02-18 17:59:12 +0100 | [diff] [blame] | 713 | if (!list_empty(&mm->head_node.node_list)) { |
Thomas Hellstrom | 3a1bd92 | 2006-08-07 21:30:28 +1000 | [diff] [blame] | 714 | DRM_ERROR("Memory manager not clean. Delaying takedown\n"); |
| 715 | return; |
| 716 | } |
| 717 | |
Jerome Glisse | 249d604 | 2009-04-08 17:11:16 +0200 | [diff] [blame] | 718 | spin_lock(&mm->unused_lock); |
Daniel Vetter | ea7b1dd | 2011-02-18 17:59:12 +0100 | [diff] [blame] | 719 | list_for_each_entry_safe(entry, next, &mm->unused_nodes, node_list) { |
| 720 | list_del(&entry->node_list); |
Jerome Glisse | 249d604 | 2009-04-08 17:11:16 +0200 | [diff] [blame] | 721 | kfree(entry); |
| 722 | --mm->num_unused; |
| 723 | } |
| 724 | spin_unlock(&mm->unused_lock); |
| 725 | |
| 726 | BUG_ON(mm->num_unused != 0); |
Thomas Hellstrom | 3a1bd92 | 2006-08-07 21:30:28 +1000 | [diff] [blame] | 727 | } |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 728 | EXPORT_SYMBOL(drm_mm_takedown); |
Dave Airlie | fa8a123 | 2009-08-26 13:13:37 +1000 | [diff] [blame] | 729 | |
Jerome Glisse | 99d7e48 | 2009-12-09 21:55:09 +0100 | [diff] [blame] | 730 | void drm_mm_debug_table(struct drm_mm *mm, const char *prefix) |
| 731 | { |
| 732 | struct drm_mm_node *entry; |
Daniel Vetter | ea7b1dd | 2011-02-18 17:59:12 +0100 | [diff] [blame] | 733 | unsigned long total_used = 0, total_free = 0, total = 0; |
| 734 | unsigned long hole_start, hole_end, hole_size; |
Jerome Glisse | 99d7e48 | 2009-12-09 21:55:09 +0100 | [diff] [blame] | 735 | |
Daniel Vetter | ea7b1dd | 2011-02-18 17:59:12 +0100 | [diff] [blame] | 736 | hole_start = drm_mm_hole_node_start(&mm->head_node); |
| 737 | hole_end = drm_mm_hole_node_end(&mm->head_node); |
| 738 | hole_size = hole_end - hole_start; |
| 739 | if (hole_size) |
| 740 | printk(KERN_DEBUG "%s 0x%08lx-0x%08lx: %8lu: free\n", |
| 741 | prefix, hole_start, hole_end, |
| 742 | hole_size); |
| 743 | total_free += hole_size; |
| 744 | |
| 745 | drm_mm_for_each_node(entry, mm) { |
| 746 | printk(KERN_DEBUG "%s 0x%08lx-0x%08lx: %8lu: used\n", |
Jerome Glisse | 99d7e48 | 2009-12-09 21:55:09 +0100 | [diff] [blame] | 747 | prefix, entry->start, entry->start + entry->size, |
Daniel Vetter | ea7b1dd | 2011-02-18 17:59:12 +0100 | [diff] [blame] | 748 | entry->size); |
| 749 | total_used += entry->size; |
| 750 | |
| 751 | if (entry->hole_follows) { |
| 752 | hole_start = drm_mm_hole_node_start(entry); |
| 753 | hole_end = drm_mm_hole_node_end(entry); |
| 754 | hole_size = hole_end - hole_start; |
| 755 | printk(KERN_DEBUG "%s 0x%08lx-0x%08lx: %8lu: free\n", |
| 756 | prefix, hole_start, hole_end, |
| 757 | hole_size); |
| 758 | total_free += hole_size; |
| 759 | } |
Jerome Glisse | 99d7e48 | 2009-12-09 21:55:09 +0100 | [diff] [blame] | 760 | } |
Daniel Vetter | ea7b1dd | 2011-02-18 17:59:12 +0100 | [diff] [blame] | 761 | total = total_free + total_used; |
| 762 | |
| 763 | printk(KERN_DEBUG "%s total: %lu, used %lu free %lu\n", prefix, total, |
Jerome Glisse | 99d7e48 | 2009-12-09 21:55:09 +0100 | [diff] [blame] | 764 | total_used, total_free); |
| 765 | } |
| 766 | EXPORT_SYMBOL(drm_mm_debug_table); |
| 767 | |
Dave Airlie | fa8a123 | 2009-08-26 13:13:37 +1000 | [diff] [blame] | 768 | #if defined(CONFIG_DEBUG_FS) |
| 769 | int drm_mm_dump_table(struct seq_file *m, struct drm_mm *mm) |
| 770 | { |
| 771 | struct drm_mm_node *entry; |
Daniel Vetter | ea7b1dd | 2011-02-18 17:59:12 +0100 | [diff] [blame] | 772 | unsigned long total_used = 0, total_free = 0, total = 0; |
| 773 | unsigned long hole_start, hole_end, hole_size; |
Dave Airlie | fa8a123 | 2009-08-26 13:13:37 +1000 | [diff] [blame] | 774 | |
Daniel Vetter | ea7b1dd | 2011-02-18 17:59:12 +0100 | [diff] [blame] | 775 | hole_start = drm_mm_hole_node_start(&mm->head_node); |
| 776 | hole_end = drm_mm_hole_node_end(&mm->head_node); |
| 777 | hole_size = hole_end - hole_start; |
| 778 | if (hole_size) |
| 779 | seq_printf(m, "0x%08lx-0x%08lx: 0x%08lx: free\n", |
| 780 | hole_start, hole_end, hole_size); |
| 781 | total_free += hole_size; |
| 782 | |
| 783 | drm_mm_for_each_node(entry, mm) { |
| 784 | seq_printf(m, "0x%08lx-0x%08lx: 0x%08lx: used\n", |
| 785 | entry->start, entry->start + entry->size, |
| 786 | entry->size); |
| 787 | total_used += entry->size; |
| 788 | if (entry->hole_follows) { |
Daniel Vetter | 2bbd449 | 2011-05-06 23:47:53 +0200 | [diff] [blame] | 789 | hole_start = drm_mm_hole_node_start(entry); |
| 790 | hole_end = drm_mm_hole_node_end(entry); |
Daniel Vetter | ea7b1dd | 2011-02-18 17:59:12 +0100 | [diff] [blame] | 791 | hole_size = hole_end - hole_start; |
| 792 | seq_printf(m, "0x%08lx-0x%08lx: 0x%08lx: free\n", |
| 793 | hole_start, hole_end, hole_size); |
| 794 | total_free += hole_size; |
| 795 | } |
Dave Airlie | fa8a123 | 2009-08-26 13:13:37 +1000 | [diff] [blame] | 796 | } |
Daniel Vetter | ea7b1dd | 2011-02-18 17:59:12 +0100 | [diff] [blame] | 797 | total = total_free + total_used; |
| 798 | |
| 799 | seq_printf(m, "total: %lu, used %lu free %lu\n", total, total_used, total_free); |
Dave Airlie | fa8a123 | 2009-08-26 13:13:37 +1000 | [diff] [blame] | 800 | return 0; |
| 801 | } |
| 802 | EXPORT_SYMBOL(drm_mm_dump_table); |
| 803 | #endif |