2 * Copyright 2016 Advanced Micro Devices, Inc.
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:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
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.
22 * Authors: Christian König
27 static inline struct amdgpu_gtt_mgr *
28 to_gtt_mgr(struct ttm_resource_manager *man)
30 return container_of(man, struct amdgpu_gtt_mgr, manager);
33 struct amdgpu_gtt_node {
34 struct drm_mm_node node;
35 struct ttm_buffer_object *tbo;
39 * DOC: mem_info_gtt_total
41 * The amdgpu driver provides a sysfs API for reporting current total size of
43 * The file mem_info_gtt_total is used for this, and returns the total size of
44 * the GTT block, in bytes
46 static ssize_t amdgpu_mem_info_gtt_total_show(struct device *dev,
47 struct device_attribute *attr,
50 struct drm_device *ddev = dev_get_drvdata(dev);
51 struct amdgpu_device *adev = drm_to_adev(ddev);
52 struct ttm_resource_manager *man;
54 man = ttm_manager_type(&adev->mman.bdev, TTM_PL_TT);
55 return sysfs_emit(buf, "%llu\n", man->size * PAGE_SIZE);
59 * DOC: mem_info_gtt_used
61 * The amdgpu driver provides a sysfs API for reporting current total amount of
63 * The file mem_info_gtt_used is used for this, and returns the current used
64 * size of the GTT block, in bytes
66 static ssize_t amdgpu_mem_info_gtt_used_show(struct device *dev,
67 struct device_attribute *attr,
70 struct drm_device *ddev = dev_get_drvdata(dev);
71 struct amdgpu_device *adev = drm_to_adev(ddev);
72 struct ttm_resource_manager *man;
74 man = ttm_manager_type(&adev->mman.bdev, TTM_PL_TT);
75 return sysfs_emit(buf, "%llu\n", amdgpu_gtt_mgr_usage(man));
78 static DEVICE_ATTR(mem_info_gtt_total, S_IRUGO,
79 amdgpu_mem_info_gtt_total_show, NULL);
80 static DEVICE_ATTR(mem_info_gtt_used, S_IRUGO,
81 amdgpu_mem_info_gtt_used_show, NULL);
84 * amdgpu_gtt_mgr_has_gart_addr - Check if mem has address space
86 * @mem: the mem object to check
88 * Check if a mem object has already address space allocated.
90 bool amdgpu_gtt_mgr_has_gart_addr(struct ttm_resource *mem)
92 return mem->mm_node != NULL;
96 * amdgpu_gtt_mgr_new - allocate a new node
98 * @man: TTM memory type manager
99 * @tbo: TTM BO we need this range for
100 * @place: placement flags and restrictions
101 * @mem: the resulting mem object
103 * Dummy, allocate the node but no space for it yet.
105 static int amdgpu_gtt_mgr_new(struct ttm_resource_manager *man,
106 struct ttm_buffer_object *tbo,
107 const struct ttm_place *place,
108 struct ttm_resource *mem)
110 struct amdgpu_gtt_mgr *mgr = to_gtt_mgr(man);
111 struct amdgpu_gtt_node *node;
114 spin_lock(&mgr->lock);
115 if ((&tbo->mem == mem || tbo->mem.mem_type != TTM_PL_TT) &&
116 atomic64_read(&mgr->available) < mem->num_pages) {
117 spin_unlock(&mgr->lock);
120 atomic64_sub(mem->num_pages, &mgr->available);
121 spin_unlock(&mgr->lock);
125 mem->start = AMDGPU_BO_INVALID_OFFSET;
129 node = kzalloc(sizeof(*node), GFP_KERNEL);
137 spin_lock(&mgr->lock);
138 r = drm_mm_insert_node_in_range(&mgr->mm, &node->node, mem->num_pages,
139 mem->page_alignment, 0, place->fpfn,
140 place->lpfn, DRM_MM_INSERT_BEST);
141 spin_unlock(&mgr->lock);
147 mem->start = node->node.start;
155 atomic64_add(mem->num_pages, &mgr->available);
161 * amdgpu_gtt_mgr_del - free ranges
163 * @man: TTM memory type manager
164 * @mem: TTM memory object
166 * Free the allocated GTT again.
168 static void amdgpu_gtt_mgr_del(struct ttm_resource_manager *man,
169 struct ttm_resource *mem)
171 struct amdgpu_gtt_mgr *mgr = to_gtt_mgr(man);
172 struct amdgpu_gtt_node *node = mem->mm_node;
175 spin_lock(&mgr->lock);
176 drm_mm_remove_node(&node->node);
177 spin_unlock(&mgr->lock);
181 atomic64_add(mem->num_pages, &mgr->available);
185 * amdgpu_gtt_mgr_usage - return usage of GTT domain
187 * @man: TTM memory type manager
189 * Return how many bytes are used in the GTT domain
191 uint64_t amdgpu_gtt_mgr_usage(struct ttm_resource_manager *man)
193 struct amdgpu_gtt_mgr *mgr = to_gtt_mgr(man);
194 s64 result = man->size - atomic64_read(&mgr->available);
196 return (result > 0 ? result : 0) * PAGE_SIZE;
200 * amdgpu_gtt_mgr_recover - re-init gart
202 * @man: TTM memory type manager
204 * Re-init the gart for each known BO in the GTT.
206 int amdgpu_gtt_mgr_recover(struct ttm_resource_manager *man)
208 struct amdgpu_gtt_mgr *mgr = to_gtt_mgr(man);
209 struct amdgpu_gtt_node *node;
210 struct drm_mm_node *mm_node;
213 spin_lock(&mgr->lock);
214 drm_mm_for_each_node(mm_node, &mgr->mm) {
215 node = container_of(mm_node, struct amdgpu_gtt_node, node);
216 r = amdgpu_ttm_recover_gart(node->tbo);
220 spin_unlock(&mgr->lock);
226 * amdgpu_gtt_mgr_debug - dump VRAM table
228 * @man: TTM memory type manager
229 * @printer: DRM printer to use
231 * Dump the table content using printk.
233 static void amdgpu_gtt_mgr_debug(struct ttm_resource_manager *man,
234 struct drm_printer *printer)
236 struct amdgpu_gtt_mgr *mgr = to_gtt_mgr(man);
238 spin_lock(&mgr->lock);
239 drm_mm_print(&mgr->mm, printer);
240 spin_unlock(&mgr->lock);
242 drm_printf(printer, "man size:%llu pages, gtt available:%lld pages, usage:%lluMB\n",
243 man->size, (u64)atomic64_read(&mgr->available),
244 amdgpu_gtt_mgr_usage(man) >> 20);
247 static const struct ttm_resource_manager_func amdgpu_gtt_mgr_func = {
248 .alloc = amdgpu_gtt_mgr_new,
249 .free = amdgpu_gtt_mgr_del,
250 .debug = amdgpu_gtt_mgr_debug
254 * amdgpu_gtt_mgr_init - init GTT manager and DRM MM
256 * @adev: amdgpu_device pointer
257 * @gtt_size: maximum size of GTT
259 * Allocate and initialize the GTT manager.
261 int amdgpu_gtt_mgr_init(struct amdgpu_device *adev, uint64_t gtt_size)
263 struct amdgpu_gtt_mgr *mgr = &adev->mman.gtt_mgr;
264 struct ttm_resource_manager *man = &mgr->manager;
265 uint64_t start, size;
269 man->func = &amdgpu_gtt_mgr_func;
271 ttm_resource_manager_init(man, gtt_size >> PAGE_SHIFT);
273 start = AMDGPU_GTT_MAX_TRANSFER_SIZE * AMDGPU_GTT_NUM_TRANSFER_WINDOWS;
274 size = (adev->gmc.gart_size >> PAGE_SHIFT) - start;
275 drm_mm_init(&mgr->mm, start, size);
276 spin_lock_init(&mgr->lock);
277 atomic64_set(&mgr->available, gtt_size >> PAGE_SHIFT);
279 ret = device_create_file(adev->dev, &dev_attr_mem_info_gtt_total);
281 DRM_ERROR("Failed to create device file mem_info_gtt_total\n");
284 ret = device_create_file(adev->dev, &dev_attr_mem_info_gtt_used);
286 DRM_ERROR("Failed to create device file mem_info_gtt_used\n");
290 ttm_set_driver_manager(&adev->mman.bdev, TTM_PL_TT, &mgr->manager);
291 ttm_resource_manager_set_used(man, true);
296 * amdgpu_gtt_mgr_fini - free and destroy GTT manager
298 * @adev: amdgpu_device pointer
300 * Destroy and free the GTT manager, returns -EBUSY if ranges are still
301 * allocated inside it.
303 void amdgpu_gtt_mgr_fini(struct amdgpu_device *adev)
305 struct amdgpu_gtt_mgr *mgr = &adev->mman.gtt_mgr;
306 struct ttm_resource_manager *man = &mgr->manager;
309 ttm_resource_manager_set_used(man, false);
311 ret = ttm_resource_manager_evict_all(&adev->mman.bdev, man);
315 spin_lock(&mgr->lock);
316 drm_mm_takedown(&mgr->mm);
317 spin_unlock(&mgr->lock);
319 device_remove_file(adev->dev, &dev_attr_mem_info_gtt_total);
320 device_remove_file(adev->dev, &dev_attr_mem_info_gtt_used);
322 ttm_resource_manager_cleanup(man);
323 ttm_set_driver_manager(&adev->mman.bdev, TTM_PL_TT, NULL);