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);
80 struct ttm_resource_manager *man;
82 man = ttm_manager_type(&adev->mman.bdev, TTM_PL_TT);
83 return sysfs_emit(buf, "%llu\n", amdgpu_gtt_mgr_usage(man));
86 static DEVICE_ATTR(mem_info_gtt_total, S_IRUGO,
87 amdgpu_mem_info_gtt_total_show, NULL);
88 static DEVICE_ATTR(mem_info_gtt_used, S_IRUGO,
89 amdgpu_mem_info_gtt_used_show, NULL);
91 static struct attribute *amdgpu_gtt_mgr_attributes[] = {
92 &dev_attr_mem_info_gtt_total.attr,
93 &dev_attr_mem_info_gtt_used.attr,
97 const struct attribute_group amdgpu_gtt_mgr_attr_group = {
98 .attrs = amdgpu_gtt_mgr_attributes
102 * amdgpu_gtt_mgr_has_gart_addr - Check if mem has address space
104 * @res: the mem object to check
106 * Check if a mem object has already address space allocated.
108 bool amdgpu_gtt_mgr_has_gart_addr(struct ttm_resource *res)
110 struct amdgpu_gtt_node *node = to_amdgpu_gtt_node(res);
112 return drm_mm_node_allocated(&node->base.mm_nodes[0]);
116 * amdgpu_gtt_mgr_new - allocate a new node
118 * @man: TTM memory type manager
119 * @tbo: TTM BO we need this range for
120 * @place: placement flags and restrictions
121 * @mem: the resulting mem object
123 * Dummy, allocate the node but no space for it yet.
125 static int amdgpu_gtt_mgr_new(struct ttm_resource_manager *man,
126 struct ttm_buffer_object *tbo,
127 const struct ttm_place *place,
128 struct ttm_resource **res)
130 struct amdgpu_gtt_mgr *mgr = to_gtt_mgr(man);
131 uint32_t num_pages = PFN_UP(tbo->base.size);
132 struct amdgpu_gtt_node *node;
135 spin_lock(&mgr->lock);
136 if (tbo->resource && tbo->resource->mem_type != TTM_PL_TT &&
137 atomic64_read(&mgr->available) < num_pages) {
138 spin_unlock(&mgr->lock);
141 atomic64_sub(num_pages, &mgr->available);
142 spin_unlock(&mgr->lock);
144 node = kzalloc(struct_size(node, base.mm_nodes, 1), GFP_KERNEL);
151 ttm_resource_init(tbo, place, &node->base.base);
154 spin_lock(&mgr->lock);
155 r = drm_mm_insert_node_in_range(&mgr->mm,
156 &node->base.mm_nodes[0],
157 num_pages, tbo->page_alignment,
158 0, place->fpfn, place->lpfn,
160 spin_unlock(&mgr->lock);
164 node->base.base.start = node->base.mm_nodes[0].start;
166 node->base.mm_nodes[0].start = 0;
167 node->base.mm_nodes[0].size = node->base.base.num_pages;
168 node->base.base.start = AMDGPU_BO_INVALID_OFFSET;
171 *res = &node->base.base;
178 atomic64_add(num_pages, &mgr->available);
184 * amdgpu_gtt_mgr_del - free ranges
186 * @man: TTM memory type manager
187 * @mem: TTM memory object
189 * Free the allocated GTT again.
191 static void amdgpu_gtt_mgr_del(struct ttm_resource_manager *man,
192 struct ttm_resource *res)
194 struct amdgpu_gtt_node *node = to_amdgpu_gtt_node(res);
195 struct amdgpu_gtt_mgr *mgr = to_gtt_mgr(man);
197 spin_lock(&mgr->lock);
198 if (drm_mm_node_allocated(&node->base.mm_nodes[0]))
199 drm_mm_remove_node(&node->base.mm_nodes[0]);
200 spin_unlock(&mgr->lock);
201 atomic64_add(res->num_pages, &mgr->available);
207 * amdgpu_gtt_mgr_usage - return usage of GTT domain
209 * @man: TTM memory type manager
211 * Return how many bytes are used in the GTT domain
213 uint64_t amdgpu_gtt_mgr_usage(struct ttm_resource_manager *man)
215 struct amdgpu_gtt_mgr *mgr = to_gtt_mgr(man);
216 s64 result = man->size - atomic64_read(&mgr->available);
218 return (result > 0 ? result : 0) * PAGE_SIZE;
222 * amdgpu_gtt_mgr_recover - re-init gart
224 * @man: TTM memory type manager
226 * Re-init the gart for each known BO in the GTT.
228 int amdgpu_gtt_mgr_recover(struct ttm_resource_manager *man)
230 struct amdgpu_gtt_mgr *mgr = to_gtt_mgr(man);
231 struct amdgpu_device *adev;
232 struct amdgpu_gtt_node *node;
233 struct drm_mm_node *mm_node;
236 adev = container_of(mgr, typeof(*adev), mman.gtt_mgr);
237 spin_lock(&mgr->lock);
238 drm_mm_for_each_node(mm_node, &mgr->mm) {
239 node = container_of(mm_node, typeof(*node), base.mm_nodes[0]);
240 r = amdgpu_ttm_recover_gart(node->tbo);
244 spin_unlock(&mgr->lock);
246 amdgpu_gart_invalidate_tlb(adev);
252 * amdgpu_gtt_mgr_debug - dump VRAM table
254 * @man: TTM memory type manager
255 * @printer: DRM printer to use
257 * Dump the table content using printk.
259 static void amdgpu_gtt_mgr_debug(struct ttm_resource_manager *man,
260 struct drm_printer *printer)
262 struct amdgpu_gtt_mgr *mgr = to_gtt_mgr(man);
264 spin_lock(&mgr->lock);
265 drm_mm_print(&mgr->mm, printer);
266 spin_unlock(&mgr->lock);
268 drm_printf(printer, "man size:%llu pages, gtt available:%lld pages, usage:%lluMB\n",
269 man->size, (u64)atomic64_read(&mgr->available),
270 amdgpu_gtt_mgr_usage(man) >> 20);
273 static const struct ttm_resource_manager_func amdgpu_gtt_mgr_func = {
274 .alloc = amdgpu_gtt_mgr_new,
275 .free = amdgpu_gtt_mgr_del,
276 .debug = amdgpu_gtt_mgr_debug
280 * amdgpu_gtt_mgr_init - init GTT manager and DRM MM
282 * @adev: amdgpu_device pointer
283 * @gtt_size: maximum size of GTT
285 * Allocate and initialize the GTT manager.
287 int amdgpu_gtt_mgr_init(struct amdgpu_device *adev, uint64_t gtt_size)
289 struct amdgpu_gtt_mgr *mgr = &adev->mman.gtt_mgr;
290 struct ttm_resource_manager *man = &mgr->manager;
291 uint64_t start, size;
294 man->func = &amdgpu_gtt_mgr_func;
296 ttm_resource_manager_init(man, gtt_size >> PAGE_SHIFT);
298 start = AMDGPU_GTT_MAX_TRANSFER_SIZE * AMDGPU_GTT_NUM_TRANSFER_WINDOWS;
299 size = (adev->gmc.gart_size >> PAGE_SHIFT) - start;
300 drm_mm_init(&mgr->mm, start, size);
301 spin_lock_init(&mgr->lock);
302 atomic64_set(&mgr->available, gtt_size >> PAGE_SHIFT);
304 ttm_set_driver_manager(&adev->mman.bdev, TTM_PL_TT, &mgr->manager);
305 ttm_resource_manager_set_used(man, true);
310 * amdgpu_gtt_mgr_fini - free and destroy GTT manager
312 * @adev: amdgpu_device pointer
314 * Destroy and free the GTT manager, returns -EBUSY if ranges are still
315 * allocated inside it.
317 void amdgpu_gtt_mgr_fini(struct amdgpu_device *adev)
319 struct amdgpu_gtt_mgr *mgr = &adev->mman.gtt_mgr;
320 struct ttm_resource_manager *man = &mgr->manager;
323 ttm_resource_manager_set_used(man, false);
325 ret = ttm_resource_manager_evict_all(&adev->mman.bdev, man);
329 spin_lock(&mgr->lock);
330 drm_mm_takedown(&mgr->mm);
331 spin_unlock(&mgr->lock);
333 ttm_resource_manager_cleanup(man);
334 ttm_set_driver_manager(&adev->mman.bdev, TTM_PL_TT, NULL);