1 /* 2 * Copyright 2016 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 * Authors: Christian König 23 */ 24 25 #include <drm/ttm/ttm_range_manager.h> 26 27 #include "amdgpu.h" 28 29 struct amdgpu_gtt_node { 30 struct ttm_buffer_object *tbo; 31 struct ttm_range_mgr_node base; 32 }; 33 34 static inline struct amdgpu_gtt_mgr * 35 to_gtt_mgr(struct ttm_resource_manager *man) 36 { 37 return container_of(man, struct amdgpu_gtt_mgr, manager); 38 } 39 40 static inline struct amdgpu_gtt_node * 41 to_amdgpu_gtt_node(struct ttm_resource *res) 42 { 43 return container_of(res, struct amdgpu_gtt_node, base.base); 44 } 45 46 /** 47 * DOC: mem_info_gtt_total 48 * 49 * The amdgpu driver provides a sysfs API for reporting current total size of 50 * the GTT. 51 * The file mem_info_gtt_total is used for this, and returns the total size of 52 * the GTT block, in bytes 53 */ 54 static ssize_t amdgpu_mem_info_gtt_total_show(struct device *dev, 55 struct device_attribute *attr, 56 char *buf) 57 { 58 struct drm_device *ddev = dev_get_drvdata(dev); 59 struct amdgpu_device *adev = drm_to_adev(ddev); 60 struct ttm_resource_manager *man; 61 62 man = ttm_manager_type(&adev->mman.bdev, TTM_PL_TT); 63 return sysfs_emit(buf, "%llu\n", man->size); 64 } 65 66 /** 67 * DOC: mem_info_gtt_used 68 * 69 * The amdgpu driver provides a sysfs API for reporting current total amount of 70 * used GTT. 71 * The file mem_info_gtt_used is used for this, and returns the current used 72 * size of the GTT block, in bytes 73 */ 74 static ssize_t amdgpu_mem_info_gtt_used_show(struct device *dev, 75 struct device_attribute *attr, 76 char *buf) 77 { 78 struct drm_device *ddev = dev_get_drvdata(dev); 79 struct amdgpu_device *adev = drm_to_adev(ddev); 80 struct ttm_resource_manager *man = &adev->mman.gtt_mgr.manager; 81 82 return sysfs_emit(buf, "%llu\n", ttm_resource_manager_usage(man)); 83 } 84 85 static DEVICE_ATTR(mem_info_gtt_total, S_IRUGO, 86 amdgpu_mem_info_gtt_total_show, NULL); 87 static DEVICE_ATTR(mem_info_gtt_used, S_IRUGO, 88 amdgpu_mem_info_gtt_used_show, NULL); 89 90 static struct attribute *amdgpu_gtt_mgr_attributes[] = { 91 &dev_attr_mem_info_gtt_total.attr, 92 &dev_attr_mem_info_gtt_used.attr, 93 NULL 94 }; 95 96 const struct attribute_group amdgpu_gtt_mgr_attr_group = { 97 .attrs = amdgpu_gtt_mgr_attributes 98 }; 99 100 /** 101 * amdgpu_gtt_mgr_has_gart_addr - Check if mem has address space 102 * 103 * @res: the mem object to check 104 * 105 * Check if a mem object has already address space allocated. 106 */ 107 bool amdgpu_gtt_mgr_has_gart_addr(struct ttm_resource *res) 108 { 109 struct amdgpu_gtt_node *node = to_amdgpu_gtt_node(res); 110 111 return drm_mm_node_allocated(&node->base.mm_nodes[0]); 112 } 113 114 /** 115 * amdgpu_gtt_mgr_new - allocate a new node 116 * 117 * @man: TTM memory type manager 118 * @tbo: TTM BO we need this range for 119 * @place: placement flags and restrictions 120 * @res: the resulting mem object 121 * 122 * Dummy, allocate the node but no space for it yet. 123 */ 124 static int amdgpu_gtt_mgr_new(struct ttm_resource_manager *man, 125 struct ttm_buffer_object *tbo, 126 const struct ttm_place *place, 127 struct ttm_resource **res) 128 { 129 struct amdgpu_gtt_mgr *mgr = to_gtt_mgr(man); 130 uint32_t num_pages = PFN_UP(tbo->base.size); 131 struct amdgpu_gtt_node *node; 132 int r; 133 134 node = kzalloc(struct_size(node, base.mm_nodes, 1), GFP_KERNEL); 135 if (!node) 136 return -ENOMEM; 137 138 node->tbo = tbo; 139 ttm_resource_init(tbo, place, &node->base.base); 140 if (!(place->flags & TTM_PL_FLAG_TEMPORARY) && 141 ttm_resource_manager_usage(man) > man->size) { 142 r = -ENOSPC; 143 goto err_free; 144 } 145 146 if (place->lpfn) { 147 spin_lock(&mgr->lock); 148 r = drm_mm_insert_node_in_range(&mgr->mm, 149 &node->base.mm_nodes[0], 150 num_pages, tbo->page_alignment, 151 0, place->fpfn, place->lpfn, 152 DRM_MM_INSERT_BEST); 153 spin_unlock(&mgr->lock); 154 if (unlikely(r)) 155 goto err_free; 156 157 node->base.base.start = node->base.mm_nodes[0].start; 158 } else { 159 node->base.mm_nodes[0].start = 0; 160 node->base.mm_nodes[0].size = node->base.base.num_pages; 161 node->base.base.start = AMDGPU_BO_INVALID_OFFSET; 162 } 163 164 *res = &node->base.base; 165 return 0; 166 167 err_free: 168 ttm_resource_fini(man, &node->base.base); 169 kfree(node); 170 return r; 171 } 172 173 /** 174 * amdgpu_gtt_mgr_del - free ranges 175 * 176 * @man: TTM memory type manager 177 * @res: TTM memory object 178 * 179 * Free the allocated GTT again. 180 */ 181 static void amdgpu_gtt_mgr_del(struct ttm_resource_manager *man, 182 struct ttm_resource *res) 183 { 184 struct amdgpu_gtt_node *node = to_amdgpu_gtt_node(res); 185 struct amdgpu_gtt_mgr *mgr = to_gtt_mgr(man); 186 187 spin_lock(&mgr->lock); 188 if (drm_mm_node_allocated(&node->base.mm_nodes[0])) 189 drm_mm_remove_node(&node->base.mm_nodes[0]); 190 spin_unlock(&mgr->lock); 191 192 ttm_resource_fini(man, res); 193 kfree(node); 194 } 195 196 /** 197 * amdgpu_gtt_mgr_recover - re-init gart 198 * 199 * @mgr: amdgpu_gtt_mgr pointer 200 * 201 * Re-init the gart for each known BO in the GTT. 202 */ 203 void amdgpu_gtt_mgr_recover(struct amdgpu_gtt_mgr *mgr) 204 { 205 struct amdgpu_gtt_node *node; 206 struct drm_mm_node *mm_node; 207 struct amdgpu_device *adev; 208 209 adev = container_of(mgr, typeof(*adev), mman.gtt_mgr); 210 spin_lock(&mgr->lock); 211 drm_mm_for_each_node(mm_node, &mgr->mm) { 212 node = container_of(mm_node, typeof(*node), base.mm_nodes[0]); 213 amdgpu_ttm_recover_gart(node->tbo); 214 } 215 spin_unlock(&mgr->lock); 216 217 amdgpu_gart_invalidate_tlb(adev); 218 } 219 220 /** 221 * amdgpu_gtt_mgr_debug - dump VRAM table 222 * 223 * @man: TTM memory type manager 224 * @printer: DRM printer to use 225 * 226 * Dump the table content using printk. 227 */ 228 static void amdgpu_gtt_mgr_debug(struct ttm_resource_manager *man, 229 struct drm_printer *printer) 230 { 231 struct amdgpu_gtt_mgr *mgr = to_gtt_mgr(man); 232 233 spin_lock(&mgr->lock); 234 drm_mm_print(&mgr->mm, printer); 235 spin_unlock(&mgr->lock); 236 } 237 238 static const struct ttm_resource_manager_func amdgpu_gtt_mgr_func = { 239 .alloc = amdgpu_gtt_mgr_new, 240 .free = amdgpu_gtt_mgr_del, 241 .debug = amdgpu_gtt_mgr_debug 242 }; 243 244 /** 245 * amdgpu_gtt_mgr_init - init GTT manager and DRM MM 246 * 247 * @adev: amdgpu_device pointer 248 * @gtt_size: maximum size of GTT 249 * 250 * Allocate and initialize the GTT manager. 251 */ 252 int amdgpu_gtt_mgr_init(struct amdgpu_device *adev, uint64_t gtt_size) 253 { 254 struct amdgpu_gtt_mgr *mgr = &adev->mman.gtt_mgr; 255 struct ttm_resource_manager *man = &mgr->manager; 256 uint64_t start, size; 257 258 man->use_tt = true; 259 man->func = &amdgpu_gtt_mgr_func; 260 261 ttm_resource_manager_init(man, &adev->mman.bdev, gtt_size); 262 263 start = AMDGPU_GTT_MAX_TRANSFER_SIZE * AMDGPU_GTT_NUM_TRANSFER_WINDOWS; 264 size = (adev->gmc.gart_size >> PAGE_SHIFT) - start; 265 drm_mm_init(&mgr->mm, start, size); 266 spin_lock_init(&mgr->lock); 267 268 ttm_set_driver_manager(&adev->mman.bdev, TTM_PL_TT, &mgr->manager); 269 ttm_resource_manager_set_used(man, true); 270 return 0; 271 } 272 273 /** 274 * amdgpu_gtt_mgr_fini - free and destroy GTT manager 275 * 276 * @adev: amdgpu_device pointer 277 * 278 * Destroy and free the GTT manager, returns -EBUSY if ranges are still 279 * allocated inside it. 280 */ 281 void amdgpu_gtt_mgr_fini(struct amdgpu_device *adev) 282 { 283 struct amdgpu_gtt_mgr *mgr = &adev->mman.gtt_mgr; 284 struct ttm_resource_manager *man = &mgr->manager; 285 int ret; 286 287 ttm_resource_manager_set_used(man, false); 288 289 ret = ttm_resource_manager_evict_all(&adev->mman.bdev, man); 290 if (ret) 291 return; 292 293 spin_lock(&mgr->lock); 294 drm_mm_takedown(&mgr->mm); 295 spin_unlock(&mgr->lock); 296 297 ttm_resource_manager_cleanup(man); 298 ttm_set_driver_manager(&adev->mman.bdev, TTM_PL_TT, NULL); 299 } 300