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);
83 static struct attribute *amdgpu_gtt_mgr_attributes[] = {
84 &dev_attr_mem_info_gtt_total.attr,
85 &dev_attr_mem_info_gtt_used.attr,
89 const struct attribute_group amdgpu_gtt_mgr_attr_group = {
90 .attrs = amdgpu_gtt_mgr_attributes
94 * amdgpu_gtt_mgr_has_gart_addr - Check if mem has address space
96 * @mem: the mem object to check
98 * Check if a mem object has already address space allocated.
100 bool amdgpu_gtt_mgr_has_gart_addr(struct ttm_resource *mem)
102 return mem->mm_node != NULL;
106 * amdgpu_gtt_mgr_new - allocate a new node
108 * @man: TTM memory type manager
109 * @tbo: TTM BO we need this range for
110 * @place: placement flags and restrictions
111 * @mem: the resulting mem object
113 * Dummy, allocate the node but no space for it yet.
115 static int amdgpu_gtt_mgr_new(struct ttm_resource_manager *man,
116 struct ttm_buffer_object *tbo,
117 const struct ttm_place *place,
118 struct ttm_resource *mem)
120 struct amdgpu_gtt_mgr *mgr = to_gtt_mgr(man);
121 struct amdgpu_gtt_node *node;
124 spin_lock(&mgr->lock);
125 if ((tbo->resource == mem || tbo->resource->mem_type != TTM_PL_TT) &&
126 atomic64_read(&mgr->available) < mem->num_pages) {
127 spin_unlock(&mgr->lock);
130 atomic64_sub(mem->num_pages, &mgr->available);
131 spin_unlock(&mgr->lock);
135 mem->start = AMDGPU_BO_INVALID_OFFSET;
139 node = kzalloc(sizeof(*node), GFP_KERNEL);
147 spin_lock(&mgr->lock);
148 r = drm_mm_insert_node_in_range(&mgr->mm, &node->node, mem->num_pages,
149 tbo->page_alignment, 0, place->fpfn,
150 place->lpfn, DRM_MM_INSERT_BEST);
151 spin_unlock(&mgr->lock);
157 mem->start = node->node.start;
165 atomic64_add(mem->num_pages, &mgr->available);
171 * amdgpu_gtt_mgr_del - free ranges
173 * @man: TTM memory type manager
174 * @mem: TTM memory object
176 * Free the allocated GTT again.
178 static void amdgpu_gtt_mgr_del(struct ttm_resource_manager *man,
179 struct ttm_resource *mem)
181 struct amdgpu_gtt_mgr *mgr = to_gtt_mgr(man);
182 struct amdgpu_gtt_node *node = mem->mm_node;
185 spin_lock(&mgr->lock);
186 drm_mm_remove_node(&node->node);
187 spin_unlock(&mgr->lock);
191 atomic64_add(mem->num_pages, &mgr->available);
195 * amdgpu_gtt_mgr_usage - return usage of GTT domain
197 * @man: TTM memory type manager
199 * Return how many bytes are used in the GTT domain
201 uint64_t amdgpu_gtt_mgr_usage(struct ttm_resource_manager *man)
203 struct amdgpu_gtt_mgr *mgr = to_gtt_mgr(man);
204 s64 result = man->size - atomic64_read(&mgr->available);
206 return (result > 0 ? result : 0) * PAGE_SIZE;
210 * amdgpu_gtt_mgr_recover - re-init gart
212 * @man: TTM memory type manager
214 * Re-init the gart for each known BO in the GTT.
216 int amdgpu_gtt_mgr_recover(struct ttm_resource_manager *man)
218 struct amdgpu_gtt_mgr *mgr = to_gtt_mgr(man);
219 struct amdgpu_gtt_node *node;
220 struct drm_mm_node *mm_node;
223 spin_lock(&mgr->lock);
224 drm_mm_for_each_node(mm_node, &mgr->mm) {
225 node = container_of(mm_node, struct amdgpu_gtt_node, node);
226 r = amdgpu_ttm_recover_gart(node->tbo);
230 spin_unlock(&mgr->lock);
236 * amdgpu_gtt_mgr_debug - dump VRAM table
238 * @man: TTM memory type manager
239 * @printer: DRM printer to use
241 * Dump the table content using printk.
243 static void amdgpu_gtt_mgr_debug(struct ttm_resource_manager *man,
244 struct drm_printer *printer)
246 struct amdgpu_gtt_mgr *mgr = to_gtt_mgr(man);
248 spin_lock(&mgr->lock);
249 drm_mm_print(&mgr->mm, printer);
250 spin_unlock(&mgr->lock);
252 drm_printf(printer, "man size:%llu pages, gtt available:%lld pages, usage:%lluMB\n",
253 man->size, (u64)atomic64_read(&mgr->available),
254 amdgpu_gtt_mgr_usage(man) >> 20);
257 static const struct ttm_resource_manager_func amdgpu_gtt_mgr_func = {
258 .alloc = amdgpu_gtt_mgr_new,
259 .free = amdgpu_gtt_mgr_del,
260 .debug = amdgpu_gtt_mgr_debug
264 * amdgpu_gtt_mgr_init - init GTT manager and DRM MM
266 * @adev: amdgpu_device pointer
267 * @gtt_size: maximum size of GTT
269 * Allocate and initialize the GTT manager.
271 int amdgpu_gtt_mgr_init(struct amdgpu_device *adev, uint64_t gtt_size)
273 struct amdgpu_gtt_mgr *mgr = &adev->mman.gtt_mgr;
274 struct ttm_resource_manager *man = &mgr->manager;
275 uint64_t start, size;
278 man->func = &amdgpu_gtt_mgr_func;
280 ttm_resource_manager_init(man, gtt_size >> PAGE_SHIFT);
282 start = AMDGPU_GTT_MAX_TRANSFER_SIZE * AMDGPU_GTT_NUM_TRANSFER_WINDOWS;
283 size = (adev->gmc.gart_size >> PAGE_SHIFT) - start;
284 drm_mm_init(&mgr->mm, start, size);
285 spin_lock_init(&mgr->lock);
286 atomic64_set(&mgr->available, gtt_size >> PAGE_SHIFT);
288 ttm_set_driver_manager(&adev->mman.bdev, TTM_PL_TT, &mgr->manager);
289 ttm_resource_manager_set_used(man, true);
294 * amdgpu_gtt_mgr_fini - free and destroy GTT manager
296 * @adev: amdgpu_device pointer
298 * Destroy and free the GTT manager, returns -EBUSY if ranges are still
299 * allocated inside it.
301 void amdgpu_gtt_mgr_fini(struct amdgpu_device *adev)
303 struct amdgpu_gtt_mgr *mgr = &adev->mman.gtt_mgr;
304 struct ttm_resource_manager *man = &mgr->manager;
307 ttm_resource_manager_set_used(man, false);
309 ret = ttm_resource_manager_evict_all(&adev->mman.bdev, man);
313 spin_lock(&mgr->lock);
314 drm_mm_takedown(&mgr->mm);
315 spin_unlock(&mgr->lock);
317 ttm_resource_manager_cleanup(man);
318 ttm_set_driver_manager(&adev->mman.bdev, TTM_PL_TT, NULL);