Ben Skeggs | d961db7 | 2010-08-05 10:48:18 +1000 | [diff] [blame] | 1 | /************************************************************************** |
| 2 | * |
Thomas Hellstrom | d7a67cb | 2010-10-29 10:46:45 +0200 | [diff] [blame] | 3 | * Copyright (c) 2007-2010 VMware, Inc., Palo Alto, CA., USA |
Ben Skeggs | d961db7 | 2010-08-05 10:48:18 +1000 | [diff] [blame] | 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 | * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com> |
| 29 | */ |
| 30 | |
| 31 | #include "ttm/ttm_module.h" |
| 32 | #include "ttm/ttm_bo_driver.h" |
| 33 | #include "ttm/ttm_placement.h" |
Thomas Hellstrom | d7a67cb | 2010-10-29 10:46:45 +0200 | [diff] [blame] | 34 | #include "drm_mm.h" |
Ben Skeggs | d961db7 | 2010-08-05 10:48:18 +1000 | [diff] [blame] | 35 | #include <linux/slab.h> |
Thomas Hellstrom | d7a67cb | 2010-10-29 10:46:45 +0200 | [diff] [blame] | 36 | #include <linux/spinlock.h> |
Ben Skeggs | d961db7 | 2010-08-05 10:48:18 +1000 | [diff] [blame] | 37 | #include <linux/module.h> |
| 38 | |
Thomas Hellstrom | d7a67cb | 2010-10-29 10:46:45 +0200 | [diff] [blame] | 39 | /** |
| 40 | * Currently we use a spinlock for the lock, but a mutex *may* be |
| 41 | * more appropriate to reduce scheduling latency if the range manager |
| 42 | * ends up with very fragmented allocation patterns. |
| 43 | */ |
| 44 | |
| 45 | struct ttm_range_manager { |
| 46 | struct drm_mm mm; |
| 47 | spinlock_t lock; |
| 48 | }; |
| 49 | |
Ben Skeggs | d961db7 | 2010-08-05 10:48:18 +1000 | [diff] [blame] | 50 | static int ttm_bo_man_get_node(struct ttm_mem_type_manager *man, |
| 51 | struct ttm_buffer_object *bo, |
| 52 | struct ttm_placement *placement, |
| 53 | struct ttm_mem_reg *mem) |
| 54 | { |
Thomas Hellstrom | d7a67cb | 2010-10-29 10:46:45 +0200 | [diff] [blame] | 55 | struct ttm_range_manager *rman = (struct ttm_range_manager *) man->priv; |
| 56 | struct drm_mm *mm = &rman->mm; |
Ben Skeggs | d961db7 | 2010-08-05 10:48:18 +1000 | [diff] [blame] | 57 | struct drm_mm_node *node = NULL; |
| 58 | unsigned long lpfn; |
| 59 | int ret; |
| 60 | |
| 61 | lpfn = placement->lpfn; |
| 62 | if (!lpfn) |
| 63 | lpfn = man->size; |
| 64 | do { |
| 65 | ret = drm_mm_pre_get(mm); |
| 66 | if (unlikely(ret)) |
| 67 | return ret; |
| 68 | |
Thomas Hellstrom | d7a67cb | 2010-10-29 10:46:45 +0200 | [diff] [blame] | 69 | spin_lock(&rman->lock); |
Ben Skeggs | d961db7 | 2010-08-05 10:48:18 +1000 | [diff] [blame] | 70 | node = drm_mm_search_free_in_range(mm, |
| 71 | mem->num_pages, mem->page_alignment, |
| 72 | placement->fpfn, lpfn, 1); |
| 73 | if (unlikely(node == NULL)) { |
Thomas Hellstrom | d7a67cb | 2010-10-29 10:46:45 +0200 | [diff] [blame] | 74 | spin_unlock(&rman->lock); |
Ben Skeggs | d961db7 | 2010-08-05 10:48:18 +1000 | [diff] [blame] | 75 | return 0; |
| 76 | } |
| 77 | node = drm_mm_get_block_atomic_range(node, mem->num_pages, |
Thomas Hellstrom | d7a67cb | 2010-10-29 10:46:45 +0200 | [diff] [blame] | 78 | mem->page_alignment, |
| 79 | placement->fpfn, |
| 80 | lpfn); |
| 81 | spin_unlock(&rman->lock); |
Ben Skeggs | d961db7 | 2010-08-05 10:48:18 +1000 | [diff] [blame] | 82 | } while (node == NULL); |
| 83 | |
| 84 | mem->mm_node = node; |
| 85 | mem->start = node->start; |
| 86 | return 0; |
| 87 | } |
| 88 | |
| 89 | static void ttm_bo_man_put_node(struct ttm_mem_type_manager *man, |
| 90 | struct ttm_mem_reg *mem) |
| 91 | { |
Thomas Hellstrom | d7a67cb | 2010-10-29 10:46:45 +0200 | [diff] [blame] | 92 | struct ttm_range_manager *rman = (struct ttm_range_manager *) man->priv; |
Ben Skeggs | d961db7 | 2010-08-05 10:48:18 +1000 | [diff] [blame] | 93 | |
| 94 | if (mem->mm_node) { |
Thomas Hellstrom | d7a67cb | 2010-10-29 10:46:45 +0200 | [diff] [blame] | 95 | spin_lock(&rman->lock); |
Ben Skeggs | d961db7 | 2010-08-05 10:48:18 +1000 | [diff] [blame] | 96 | drm_mm_put_block(mem->mm_node); |
Thomas Hellstrom | d7a67cb | 2010-10-29 10:46:45 +0200 | [diff] [blame] | 97 | spin_unlock(&rman->lock); |
Ben Skeggs | d961db7 | 2010-08-05 10:48:18 +1000 | [diff] [blame] | 98 | mem->mm_node = NULL; |
| 99 | } |
| 100 | } |
| 101 | |
| 102 | static int ttm_bo_man_init(struct ttm_mem_type_manager *man, |
| 103 | unsigned long p_size) |
| 104 | { |
Thomas Hellstrom | d7a67cb | 2010-10-29 10:46:45 +0200 | [diff] [blame] | 105 | struct ttm_range_manager *rman; |
Ben Skeggs | d961db7 | 2010-08-05 10:48:18 +1000 | [diff] [blame] | 106 | int ret; |
| 107 | |
Thomas Hellstrom | d7a67cb | 2010-10-29 10:46:45 +0200 | [diff] [blame] | 108 | rman = kzalloc(sizeof(*rman), GFP_KERNEL); |
| 109 | if (!rman) |
Ben Skeggs | d961db7 | 2010-08-05 10:48:18 +1000 | [diff] [blame] | 110 | return -ENOMEM; |
| 111 | |
Thomas Hellstrom | d7a67cb | 2010-10-29 10:46:45 +0200 | [diff] [blame] | 112 | ret = drm_mm_init(&rman->mm, 0, p_size); |
Ben Skeggs | d961db7 | 2010-08-05 10:48:18 +1000 | [diff] [blame] | 113 | if (ret) { |
Thomas Hellstrom | d7a67cb | 2010-10-29 10:46:45 +0200 | [diff] [blame] | 114 | kfree(rman); |
Ben Skeggs | d961db7 | 2010-08-05 10:48:18 +1000 | [diff] [blame] | 115 | return ret; |
| 116 | } |
| 117 | |
Thomas Hellstrom | d7a67cb | 2010-10-29 10:46:45 +0200 | [diff] [blame] | 118 | spin_lock_init(&rman->lock); |
| 119 | man->priv = rman; |
Ben Skeggs | d961db7 | 2010-08-05 10:48:18 +1000 | [diff] [blame] | 120 | return 0; |
| 121 | } |
| 122 | |
| 123 | static int ttm_bo_man_takedown(struct ttm_mem_type_manager *man) |
| 124 | { |
Thomas Hellstrom | d7a67cb | 2010-10-29 10:46:45 +0200 | [diff] [blame] | 125 | struct ttm_range_manager *rman = (struct ttm_range_manager *) man->priv; |
| 126 | struct drm_mm *mm = &rman->mm; |
Ben Skeggs | d961db7 | 2010-08-05 10:48:18 +1000 | [diff] [blame] | 127 | |
Thomas Hellstrom | d7a67cb | 2010-10-29 10:46:45 +0200 | [diff] [blame] | 128 | spin_lock(&rman->lock); |
Ben Skeggs | d961db7 | 2010-08-05 10:48:18 +1000 | [diff] [blame] | 129 | if (drm_mm_clean(mm)) { |
| 130 | drm_mm_takedown(mm); |
Thomas Hellstrom | d7a67cb | 2010-10-29 10:46:45 +0200 | [diff] [blame] | 131 | spin_unlock(&rman->lock); |
| 132 | kfree(rman); |
Ben Skeggs | d961db7 | 2010-08-05 10:48:18 +1000 | [diff] [blame] | 133 | man->priv = NULL; |
Thomas Hellstrom | d7a67cb | 2010-10-29 10:46:45 +0200 | [diff] [blame] | 134 | return 0; |
| 135 | } |
| 136 | spin_unlock(&rman->lock); |
| 137 | return -EBUSY; |
Ben Skeggs | d961db7 | 2010-08-05 10:48:18 +1000 | [diff] [blame] | 138 | } |
| 139 | |
| 140 | static void ttm_bo_man_debug(struct ttm_mem_type_manager *man, |
| 141 | const char *prefix) |
| 142 | { |
Thomas Hellstrom | d7a67cb | 2010-10-29 10:46:45 +0200 | [diff] [blame] | 143 | struct ttm_range_manager *rman = (struct ttm_range_manager *) man->priv; |
Ben Skeggs | d961db7 | 2010-08-05 10:48:18 +1000 | [diff] [blame] | 144 | |
Thomas Hellstrom | d7a67cb | 2010-10-29 10:46:45 +0200 | [diff] [blame] | 145 | spin_lock(&rman->lock); |
| 146 | drm_mm_debug_table(&rman->mm, prefix); |
| 147 | spin_unlock(&rman->lock); |
Ben Skeggs | d961db7 | 2010-08-05 10:48:18 +1000 | [diff] [blame] | 148 | } |
| 149 | |
| 150 | const struct ttm_mem_type_manager_func ttm_bo_manager_func = { |
| 151 | ttm_bo_man_init, |
| 152 | ttm_bo_man_takedown, |
| 153 | ttm_bo_man_get_node, |
| 154 | ttm_bo_man_put_node, |
Ben Skeggs | d961db7 | 2010-08-05 10:48:18 +1000 | [diff] [blame] | 155 | ttm_bo_man_debug |
| 156 | }; |
| 157 | EXPORT_SYMBOL(ttm_bo_manager_func); |