Alex Deucher | 0936139 | 2015-04-20 12:04:22 -0400 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2014 Advanced Micro Devices, Inc. |
| 3 | * |
| 4 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 5 | * copy of this software and associated documentation files (the "Software"), |
| 6 | * to deal in the Software without restriction, including without limitation |
| 7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| 8 | * and/or sell copies of the Software, and to permit persons to whom the |
| 9 | * Software is furnished to do so, subject to the following conditions: |
| 10 | * |
| 11 | * The above copyright notice and this permission notice shall be included in |
| 12 | * all copies or substantial portions of the Software. |
| 13 | * |
| 14 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 15 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 16 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 17 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| 18 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| 19 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| 20 | * OTHER DEALINGS IN THE SOFTWARE. |
| 21 | * |
| 22 | */ |
| 23 | |
| 24 | #include <stdlib.h> |
| 25 | #include <string.h> |
| 26 | #include "amdgpu.h" |
| 27 | #include "amdgpu_drm.h" |
| 28 | #include "amdgpu_internal.h" |
| 29 | #include "util_math.h" |
| 30 | |
| 31 | void amdgpu_vamgr_init(struct amdgpu_device *dev) |
| 32 | { |
| 33 | struct amdgpu_bo_va_mgr *vamgr = &dev->vamgr; |
| 34 | |
| 35 | vamgr->va_offset = dev->dev_info.virtual_address_offset; |
| 36 | vamgr->va_alignment = dev->dev_info.virtual_address_alignment; |
| 37 | |
| 38 | list_inithead(&vamgr->va_holes); |
| 39 | pthread_mutex_init(&vamgr->bo_va_mutex, NULL); |
| 40 | } |
| 41 | |
| 42 | uint64_t amdgpu_vamgr_find_va(struct amdgpu_bo_va_mgr *mgr, |
| 43 | uint64_t size, uint64_t alignment) |
| 44 | { |
| 45 | struct amdgpu_bo_va_hole *hole, *n; |
| 46 | uint64_t offset = 0, waste = 0; |
| 47 | |
| 48 | alignment = MAX2(alignment, mgr->va_alignment); |
| 49 | size = ALIGN(size, mgr->va_alignment); |
| 50 | |
| 51 | pthread_mutex_lock(&mgr->bo_va_mutex); |
| 52 | /* TODO: using more appropriate way to track the holes */ |
| 53 | /* first look for a hole */ |
| 54 | LIST_FOR_EACH_ENTRY_SAFE(hole, n, &mgr->va_holes, list) { |
| 55 | offset = hole->offset; |
| 56 | waste = offset % alignment; |
| 57 | waste = waste ? alignment - waste : 0; |
| 58 | offset += waste; |
| 59 | if (offset >= (hole->offset + hole->size)) { |
| 60 | continue; |
| 61 | } |
| 62 | if (!waste && hole->size == size) { |
| 63 | offset = hole->offset; |
| 64 | list_del(&hole->list); |
| 65 | free(hole); |
| 66 | pthread_mutex_unlock(&mgr->bo_va_mutex); |
| 67 | return offset; |
| 68 | } |
| 69 | if ((hole->size - waste) > size) { |
| 70 | if (waste) { |
| 71 | n = calloc(1, |
| 72 | sizeof(struct amdgpu_bo_va_hole)); |
| 73 | n->size = waste; |
| 74 | n->offset = hole->offset; |
| 75 | list_add(&n->list, &hole->list); |
| 76 | } |
| 77 | hole->size -= (size + waste); |
| 78 | hole->offset += size + waste; |
| 79 | pthread_mutex_unlock(&mgr->bo_va_mutex); |
| 80 | return offset; |
| 81 | } |
| 82 | if ((hole->size - waste) == size) { |
| 83 | hole->size = waste; |
| 84 | pthread_mutex_unlock(&mgr->bo_va_mutex); |
| 85 | return offset; |
| 86 | } |
| 87 | } |
| 88 | |
| 89 | offset = mgr->va_offset; |
| 90 | waste = offset % alignment; |
| 91 | waste = waste ? alignment - waste : 0; |
| 92 | if (waste) { |
| 93 | n = calloc(1, sizeof(struct amdgpu_bo_va_hole)); |
| 94 | n->size = waste; |
| 95 | n->offset = offset; |
| 96 | list_add(&n->list, &mgr->va_holes); |
| 97 | } |
| 98 | offset += waste; |
| 99 | mgr->va_offset += size + waste; |
| 100 | pthread_mutex_unlock(&mgr->bo_va_mutex); |
| 101 | return offset; |
| 102 | } |
| 103 | |
| 104 | void amdgpu_vamgr_free_va(struct amdgpu_bo_va_mgr *mgr, uint64_t va, |
| 105 | uint64_t size) |
| 106 | { |
| 107 | struct amdgpu_bo_va_hole *hole; |
| 108 | |
| 109 | size = ALIGN(size, mgr->va_alignment); |
| 110 | |
| 111 | pthread_mutex_lock(&mgr->bo_va_mutex); |
| 112 | if ((va + size) == mgr->va_offset) { |
| 113 | mgr->va_offset = va; |
| 114 | /* Delete uppermost hole if it reaches the new top */ |
| 115 | if (!LIST_IS_EMPTY(&mgr->va_holes)) { |
| 116 | hole = container_of(mgr->va_holes.next, hole, list); |
| 117 | if ((hole->offset + hole->size) == va) { |
| 118 | mgr->va_offset = hole->offset; |
| 119 | list_del(&hole->list); |
| 120 | free(hole); |
| 121 | } |
| 122 | } |
| 123 | } else { |
| 124 | struct amdgpu_bo_va_hole *next; |
| 125 | |
| 126 | hole = container_of(&mgr->va_holes, hole, list); |
| 127 | LIST_FOR_EACH_ENTRY(next, &mgr->va_holes, list) { |
| 128 | if (next->offset < va) |
| 129 | break; |
| 130 | hole = next; |
| 131 | } |
| 132 | |
| 133 | if (&hole->list != &mgr->va_holes) { |
| 134 | /* Grow upper hole if it's adjacent */ |
| 135 | if (hole->offset == (va + size)) { |
| 136 | hole->offset = va; |
| 137 | hole->size += size; |
| 138 | /* Merge lower hole if it's adjacent */ |
| 139 | if (next != hole |
| 140 | && &next->list != &mgr->va_holes |
| 141 | && (next->offset + next->size) == va) { |
| 142 | next->size += hole->size; |
| 143 | list_del(&hole->list); |
| 144 | free(hole); |
| 145 | } |
| 146 | goto out; |
| 147 | } |
| 148 | } |
| 149 | |
| 150 | /* Grow lower hole if it's adjacent */ |
| 151 | if (next != hole && &next->list != &mgr->va_holes && |
| 152 | (next->offset + next->size) == va) { |
| 153 | next->size += size; |
| 154 | goto out; |
| 155 | } |
| 156 | |
| 157 | /* FIXME on allocation failure we just lose virtual address space |
| 158 | * maybe print a warning |
| 159 | */ |
| 160 | next = calloc(1, sizeof(struct amdgpu_bo_va_hole)); |
| 161 | if (next) { |
| 162 | next->size = size; |
| 163 | next->offset = va; |
| 164 | list_add(&next->list, &hole->list); |
| 165 | } |
| 166 | } |
| 167 | out: |
| 168 | pthread_mutex_unlock(&mgr->bo_va_mutex); |
| 169 | } |