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