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 struct amdgpu_gtt_mgr {
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, char *buf)
49 struct drm_device *ddev = dev_get_drvdata(dev);
50 struct amdgpu_device *adev = ddev->dev_private;
52 return snprintf(buf, PAGE_SIZE, "%llu\n",
53 (adev->mman.bdev.man[TTM_PL_TT].size) * PAGE_SIZE);
57 * DOC: mem_info_gtt_used
59 * The amdgpu driver provides a sysfs API for reporting current total amount of
61 * The file mem_info_gtt_used is used for this, and returns the current used
62 * size of the GTT block, in bytes
64 static ssize_t amdgpu_mem_info_gtt_used_show(struct device *dev,
65 struct device_attribute *attr, char *buf)
67 struct drm_device *ddev = dev_get_drvdata(dev);
68 struct amdgpu_device *adev = ddev->dev_private;
70 return snprintf(buf, PAGE_SIZE, "%llu\n",
71 amdgpu_gtt_mgr_usage(&adev->mman.bdev.man[TTM_PL_TT]));
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);
79 static const struct ttm_mem_type_manager_func amdgpu_gtt_mgr_func;
81 * amdgpu_gtt_mgr_init - init GTT manager and DRM MM
83 * @man: TTM memory type manager
84 * @p_size: maximum size of GTT
86 * Allocate and initialize the GTT manager.
88 int amdgpu_gtt_mgr_init(struct amdgpu_device *adev, uint64_t gtt_size)
90 struct ttm_mem_type_manager *man = &adev->mman.bdev.man[TTM_PL_TT];
91 struct amdgpu_gtt_mgr *mgr;
96 man->func = &amdgpu_gtt_mgr_func;
97 man->available_caching = TTM_PL_MASK_CACHING;
98 man->default_caching = TTM_PL_FLAG_CACHED;
100 ttm_mem_type_manager_init(&adev->mman.bdev, man, gtt_size >> PAGE_SHIFT);
102 mgr = kzalloc(sizeof(*mgr), GFP_KERNEL);
106 start = AMDGPU_GTT_MAX_TRANSFER_SIZE * AMDGPU_GTT_NUM_TRANSFER_WINDOWS;
107 size = (adev->gmc.gart_size >> PAGE_SHIFT) - start;
108 drm_mm_init(&mgr->mm, start, size);
109 spin_lock_init(&mgr->lock);
110 atomic64_set(&mgr->available, gtt_size >> PAGE_SHIFT);
113 ret = device_create_file(adev->dev, &dev_attr_mem_info_gtt_total);
115 DRM_ERROR("Failed to create device file mem_info_gtt_total\n");
118 ret = device_create_file(adev->dev, &dev_attr_mem_info_gtt_used);
120 DRM_ERROR("Failed to create device file mem_info_gtt_used\n");
124 ttm_mem_type_manager_set_used(man, true);
129 * amdgpu_gtt_mgr_fini - free and destroy GTT manager
131 * @man: TTM memory type manager
133 * Destroy and free the GTT manager, returns -EBUSY if ranges are still
134 * allocated inside it.
136 void amdgpu_gtt_mgr_fini(struct amdgpu_device *adev)
138 struct ttm_mem_type_manager *man = &adev->mman.bdev.man[TTM_PL_TT];
139 struct amdgpu_gtt_mgr *mgr = man->priv;
142 ttm_mem_type_manager_disable(man);
144 ret = ttm_mem_type_manager_force_list_clean(&adev->mman.bdev, man);
148 spin_lock(&mgr->lock);
149 drm_mm_takedown(&mgr->mm);
150 spin_unlock(&mgr->lock);
154 device_remove_file(adev->dev, &dev_attr_mem_info_gtt_total);
155 device_remove_file(adev->dev, &dev_attr_mem_info_gtt_used);
157 ttm_mem_type_manager_cleanup(man);
161 * amdgpu_gtt_mgr_has_gart_addr - Check if mem has address space
163 * @mem: the mem object to check
165 * Check if a mem object has already address space allocated.
167 bool amdgpu_gtt_mgr_has_gart_addr(struct ttm_mem_reg *mem)
169 return mem->mm_node != NULL;
173 * amdgpu_gtt_mgr_new - allocate a new node
175 * @man: TTM memory type manager
176 * @tbo: TTM BO we need this range for
177 * @place: placement flags and restrictions
178 * @mem: the resulting mem object
180 * Dummy, allocate the node but no space for it yet.
182 static int amdgpu_gtt_mgr_new(struct ttm_mem_type_manager *man,
183 struct ttm_buffer_object *tbo,
184 const struct ttm_place *place,
185 struct ttm_mem_reg *mem)
187 struct amdgpu_gtt_mgr *mgr = man->priv;
188 struct amdgpu_gtt_node *node;
191 spin_lock(&mgr->lock);
192 if ((&tbo->mem == mem || tbo->mem.mem_type != TTM_PL_TT) &&
193 atomic64_read(&mgr->available) < mem->num_pages) {
194 spin_unlock(&mgr->lock);
197 atomic64_sub(mem->num_pages, &mgr->available);
198 spin_unlock(&mgr->lock);
202 mem->start = AMDGPU_BO_INVALID_OFFSET;
206 node = kzalloc(sizeof(*node), GFP_KERNEL);
214 spin_lock(&mgr->lock);
215 r = drm_mm_insert_node_in_range(&mgr->mm, &node->node, mem->num_pages,
216 mem->page_alignment, 0, place->fpfn,
217 place->lpfn, DRM_MM_INSERT_BEST);
218 spin_unlock(&mgr->lock);
224 mem->start = node->node.start;
232 atomic64_add(mem->num_pages, &mgr->available);
238 * amdgpu_gtt_mgr_del - free ranges
240 * @man: TTM memory type manager
241 * @tbo: TTM BO we need this range for
242 * @place: placement flags and restrictions
243 * @mem: TTM memory object
245 * Free the allocated GTT again.
247 static void amdgpu_gtt_mgr_del(struct ttm_mem_type_manager *man,
248 struct ttm_mem_reg *mem)
250 struct amdgpu_gtt_mgr *mgr = man->priv;
251 struct amdgpu_gtt_node *node = mem->mm_node;
254 spin_lock(&mgr->lock);
255 drm_mm_remove_node(&node->node);
256 spin_unlock(&mgr->lock);
260 atomic64_add(mem->num_pages, &mgr->available);
264 * amdgpu_gtt_mgr_usage - return usage of GTT domain
266 * @man: TTM memory type manager
268 * Return how many bytes are used in the GTT domain
270 uint64_t amdgpu_gtt_mgr_usage(struct ttm_mem_type_manager *man)
272 struct amdgpu_gtt_mgr *mgr = man->priv;
273 s64 result = man->size - atomic64_read(&mgr->available);
275 return (result > 0 ? result : 0) * PAGE_SIZE;
278 int amdgpu_gtt_mgr_recover(struct ttm_mem_type_manager *man)
280 struct amdgpu_gtt_mgr *mgr = man->priv;
281 struct amdgpu_gtt_node *node;
282 struct drm_mm_node *mm_node;
285 spin_lock(&mgr->lock);
286 drm_mm_for_each_node(mm_node, &mgr->mm) {
287 node = container_of(mm_node, struct amdgpu_gtt_node, node);
288 r = amdgpu_ttm_recover_gart(node->tbo);
292 spin_unlock(&mgr->lock);
298 * amdgpu_gtt_mgr_debug - dump VRAM table
300 * @man: TTM memory type manager
301 * @printer: DRM printer to use
303 * Dump the table content using printk.
305 static void amdgpu_gtt_mgr_debug(struct ttm_mem_type_manager *man,
306 struct drm_printer *printer)
308 struct amdgpu_gtt_mgr *mgr = man->priv;
310 spin_lock(&mgr->lock);
311 drm_mm_print(&mgr->mm, printer);
312 spin_unlock(&mgr->lock);
314 drm_printf(printer, "man size:%llu pages, gtt available:%lld pages, usage:%lluMB\n",
315 man->size, (u64)atomic64_read(&mgr->available),
316 amdgpu_gtt_mgr_usage(man) >> 20);
319 static const struct ttm_mem_type_manager_func amdgpu_gtt_mgr_func = {
320 .get_node = amdgpu_gtt_mgr_new,
321 .put_node = amdgpu_gtt_mgr_del,
322 .debug = amdgpu_gtt_mgr_debug