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
25 #include <drm/ttm/ttm_range_manager.h>
29 struct amdgpu_gtt_node {
30 struct ttm_buffer_object *tbo;
31 struct ttm_range_mgr_node base;
34 static inline struct amdgpu_gtt_mgr *
35 to_gtt_mgr(struct ttm_resource_manager *man)
37 return container_of(man, struct amdgpu_gtt_mgr, manager);
40 static inline struct amdgpu_gtt_node *
41 to_amdgpu_gtt_node(struct ttm_resource *res)
43 return container_of(res, struct amdgpu_gtt_node, base.base);
47 * DOC: mem_info_gtt_total
49 * The amdgpu driver provides a sysfs API for reporting current total size of
51 * The file mem_info_gtt_total is used for this, and returns the total size of
52 * the GTT block, in bytes
54 static ssize_t amdgpu_mem_info_gtt_total_show(struct device *dev,
55 struct device_attribute *attr,
58 struct drm_device *ddev = dev_get_drvdata(dev);
59 struct amdgpu_device *adev = drm_to_adev(ddev);
60 struct ttm_resource_manager *man;
62 man = ttm_manager_type(&adev->mman.bdev, TTM_PL_TT);
63 return sysfs_emit(buf, "%llu\n", man->size * PAGE_SIZE);
67 * DOC: mem_info_gtt_used
69 * The amdgpu driver provides a sysfs API for reporting current total amount of
71 * The file mem_info_gtt_used is used for this, and returns the current used
72 * size of the GTT block, in bytes
74 static ssize_t amdgpu_mem_info_gtt_used_show(struct device *dev,
75 struct device_attribute *attr,
78 struct drm_device *ddev = dev_get_drvdata(dev);
79 struct amdgpu_device *adev = drm_to_adev(ddev);
81 return sysfs_emit(buf, "%llu\n", amdgpu_gtt_mgr_usage(&adev->mman.gtt_mgr));
84 static DEVICE_ATTR(mem_info_gtt_total, S_IRUGO,
85 amdgpu_mem_info_gtt_total_show, NULL);
86 static DEVICE_ATTR(mem_info_gtt_used, S_IRUGO,
87 amdgpu_mem_info_gtt_used_show, NULL);
89 static struct attribute *amdgpu_gtt_mgr_attributes[] = {
90 &dev_attr_mem_info_gtt_total.attr,
91 &dev_attr_mem_info_gtt_used.attr,
95 const struct attribute_group amdgpu_gtt_mgr_attr_group = {
96 .attrs = amdgpu_gtt_mgr_attributes
100 * amdgpu_gtt_mgr_has_gart_addr - Check if mem has address space
102 * @res: the mem object to check
104 * Check if a mem object has already address space allocated.
106 bool amdgpu_gtt_mgr_has_gart_addr(struct ttm_resource *res)
108 struct amdgpu_gtt_node *node = to_amdgpu_gtt_node(res);
110 return drm_mm_node_allocated(&node->base.mm_nodes[0]);
114 * amdgpu_gtt_mgr_new - allocate a new node
116 * @man: TTM memory type manager
117 * @tbo: TTM BO we need this range for
118 * @place: placement flags and restrictions
119 * @res: the resulting mem object
121 * Dummy, allocate the node but no space for it yet.
123 static int amdgpu_gtt_mgr_new(struct ttm_resource_manager *man,
124 struct ttm_buffer_object *tbo,
125 const struct ttm_place *place,
126 struct ttm_resource **res)
128 struct amdgpu_gtt_mgr *mgr = to_gtt_mgr(man);
129 uint32_t num_pages = PFN_UP(tbo->base.size);
130 struct amdgpu_gtt_node *node;
133 if (!(place->flags & TTM_PL_FLAG_TEMPORARY) &&
134 atomic64_add_return(num_pages, &mgr->used) > man->size) {
135 atomic64_sub(num_pages, &mgr->used);
139 node = kzalloc(struct_size(node, base.mm_nodes, 1), GFP_KERNEL);
146 ttm_resource_init(tbo, place, &node->base.base);
149 spin_lock(&mgr->lock);
150 r = drm_mm_insert_node_in_range(&mgr->mm,
151 &node->base.mm_nodes[0],
152 num_pages, tbo->page_alignment,
153 0, place->fpfn, place->lpfn,
155 spin_unlock(&mgr->lock);
159 node->base.base.start = node->base.mm_nodes[0].start;
161 node->base.mm_nodes[0].start = 0;
162 node->base.mm_nodes[0].size = node->base.base.num_pages;
163 node->base.base.start = AMDGPU_BO_INVALID_OFFSET;
166 *res = &node->base.base;
170 ttm_resource_fini(man, &node->base.base);
174 if (!(place->flags & TTM_PL_FLAG_TEMPORARY))
175 atomic64_sub(num_pages, &mgr->used);
181 * amdgpu_gtt_mgr_del - free ranges
183 * @man: TTM memory type manager
184 * @res: TTM memory object
186 * Free the allocated GTT again.
188 static void amdgpu_gtt_mgr_del(struct ttm_resource_manager *man,
189 struct ttm_resource *res)
191 struct amdgpu_gtt_node *node = to_amdgpu_gtt_node(res);
192 struct amdgpu_gtt_mgr *mgr = to_gtt_mgr(man);
194 spin_lock(&mgr->lock);
195 if (drm_mm_node_allocated(&node->base.mm_nodes[0]))
196 drm_mm_remove_node(&node->base.mm_nodes[0]);
197 spin_unlock(&mgr->lock);
199 if (!(res->placement & TTM_PL_FLAG_TEMPORARY))
200 atomic64_sub(res->num_pages, &mgr->used);
202 ttm_resource_fini(man, res);
207 * amdgpu_gtt_mgr_usage - return usage of GTT domain
209 * @mgr: amdgpu_gtt_mgr pointer
211 * Return how many bytes are used in the GTT domain
213 uint64_t amdgpu_gtt_mgr_usage(struct amdgpu_gtt_mgr *mgr)
215 return atomic64_read(&mgr->used) * PAGE_SIZE;
219 * amdgpu_gtt_mgr_recover - re-init gart
221 * @mgr: amdgpu_gtt_mgr pointer
223 * Re-init the gart for each known BO in the GTT.
225 int amdgpu_gtt_mgr_recover(struct amdgpu_gtt_mgr *mgr)
227 struct amdgpu_gtt_node *node;
228 struct drm_mm_node *mm_node;
229 struct amdgpu_device *adev;
232 adev = container_of(mgr, typeof(*adev), mman.gtt_mgr);
233 spin_lock(&mgr->lock);
234 drm_mm_for_each_node(mm_node, &mgr->mm) {
235 node = container_of(mm_node, typeof(*node), base.mm_nodes[0]);
236 r = amdgpu_ttm_recover_gart(node->tbo);
240 spin_unlock(&mgr->lock);
242 amdgpu_gart_invalidate_tlb(adev);
248 * amdgpu_gtt_mgr_debug - dump VRAM table
250 * @man: TTM memory type manager
251 * @printer: DRM printer to use
253 * Dump the table content using printk.
255 static void amdgpu_gtt_mgr_debug(struct ttm_resource_manager *man,
256 struct drm_printer *printer)
258 struct amdgpu_gtt_mgr *mgr = to_gtt_mgr(man);
260 spin_lock(&mgr->lock);
261 drm_mm_print(&mgr->mm, printer);
262 spin_unlock(&mgr->lock);
264 drm_printf(printer, "man size:%llu pages, gtt used:%llu pages\n",
265 man->size, atomic64_read(&mgr->used));
268 static const struct ttm_resource_manager_func amdgpu_gtt_mgr_func = {
269 .alloc = amdgpu_gtt_mgr_new,
270 .free = amdgpu_gtt_mgr_del,
271 .debug = amdgpu_gtt_mgr_debug
275 * amdgpu_gtt_mgr_init - init GTT manager and DRM MM
277 * @adev: amdgpu_device pointer
278 * @gtt_size: maximum size of GTT
280 * Allocate and initialize the GTT manager.
282 int amdgpu_gtt_mgr_init(struct amdgpu_device *adev, uint64_t gtt_size)
284 struct amdgpu_gtt_mgr *mgr = &adev->mman.gtt_mgr;
285 struct ttm_resource_manager *man = &mgr->manager;
286 uint64_t start, size;
289 man->func = &amdgpu_gtt_mgr_func;
291 ttm_resource_manager_init(man, &adev->mman.bdev,
292 gtt_size >> PAGE_SHIFT);
294 start = AMDGPU_GTT_MAX_TRANSFER_SIZE * AMDGPU_GTT_NUM_TRANSFER_WINDOWS;
295 size = (adev->gmc.gart_size >> PAGE_SHIFT) - start;
296 drm_mm_init(&mgr->mm, start, size);
297 spin_lock_init(&mgr->lock);
298 atomic64_set(&mgr->used, 0);
300 ttm_set_driver_manager(&adev->mman.bdev, TTM_PL_TT, &mgr->manager);
301 ttm_resource_manager_set_used(man, true);
306 * amdgpu_gtt_mgr_fini - free and destroy GTT manager
308 * @adev: amdgpu_device pointer
310 * Destroy and free the GTT manager, returns -EBUSY if ranges are still
311 * allocated inside it.
313 void amdgpu_gtt_mgr_fini(struct amdgpu_device *adev)
315 struct amdgpu_gtt_mgr *mgr = &adev->mman.gtt_mgr;
316 struct ttm_resource_manager *man = &mgr->manager;
319 ttm_resource_manager_set_used(man, false);
321 ret = ttm_resource_manager_evict_all(&adev->mman.bdev, man);
325 spin_lock(&mgr->lock);
326 drm_mm_takedown(&mgr->mm);
327 spin_unlock(&mgr->lock);
329 ttm_resource_manager_cleanup(man);
330 ttm_set_driver_manager(&adev->mman.bdev, TTM_PL_TT, NULL);