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1/*
2 * Copyright 2016 Advanced Micro Devices, Inc.
3 *
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:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
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.
21 *
22 * Authors: Christian König
23 */
24
25#include "amdgpu.h"
26
27struct amdgpu_gtt_mgr {
28 struct drm_mm mm;
29 spinlock_t lock;
30 atomic64_t available;
31};
32
33struct amdgpu_gtt_node {
34 struct drm_mm_node node;
35 struct ttm_buffer_object *tbo;
36};
37
38/**
39 * DOC: mem_info_gtt_total
40 *
41 * The amdgpu driver provides a sysfs API for reporting current total size of
42 * the GTT.
43 * The file mem_info_gtt_total is used for this, and returns the total size of
44 * the GTT block, in bytes
45 */
46static ssize_t amdgpu_mem_info_gtt_total_show(struct device *dev,
47 struct device_attribute *attr, char *buf)
48{
49 struct drm_device *ddev = dev_get_drvdata(dev);
50 struct amdgpu_device *adev = ddev->dev_private;
51
52 return snprintf(buf, PAGE_SIZE, "%llu\n",
53 (adev->mman.bdev.man[TTM_PL_TT].size) * PAGE_SIZE);
54}
55
56/**
57 * DOC: mem_info_gtt_used
58 *
59 * The amdgpu driver provides a sysfs API for reporting current total amount of
60 * used GTT.
61 * The file mem_info_gtt_used is used for this, and returns the current used
62 * size of the GTT block, in bytes
63 */
64static ssize_t amdgpu_mem_info_gtt_used_show(struct device *dev,
65 struct device_attribute *attr, char *buf)
66{
67 struct drm_device *ddev = dev_get_drvdata(dev);
68 struct amdgpu_device *adev = ddev->dev_private;
69
70 return snprintf(buf, PAGE_SIZE, "%llu\n",
71 amdgpu_gtt_mgr_usage(&adev->mman.bdev.man[TTM_PL_TT]));
72}
73
74static DEVICE_ATTR(mem_info_gtt_total, S_IRUGO,
75 amdgpu_mem_info_gtt_total_show, NULL);
76static DEVICE_ATTR(mem_info_gtt_used, S_IRUGO,
77 amdgpu_mem_info_gtt_used_show, NULL);
78
79/**
80 * amdgpu_gtt_mgr_init - init GTT manager and DRM MM
81 *
82 * @man: TTM memory type manager
83 * @p_size: maximum size of GTT
84 *
85 * Allocate and initialize the GTT manager.
86 */
87static int amdgpu_gtt_mgr_init(struct ttm_mem_type_manager *man,
88 unsigned long p_size)
89{
90 struct amdgpu_device *adev = amdgpu_ttm_adev(man->bdev);
91 struct amdgpu_gtt_mgr *mgr;
92 uint64_t start, size;
93 int ret;
94
95 mgr = kzalloc(sizeof(*mgr), GFP_KERNEL);
96 if (!mgr)
97 return -ENOMEM;
98
99 start = AMDGPU_GTT_MAX_TRANSFER_SIZE * AMDGPU_GTT_NUM_TRANSFER_WINDOWS;
100 size = (adev->gmc.gart_size >> PAGE_SHIFT) - start;
101 drm_mm_init(&mgr->mm, start, size);
102 spin_lock_init(&mgr->lock);
103 atomic64_set(&mgr->available, p_size);
104 man->priv = mgr;
105
106 ret = device_create_file(adev->dev, &dev_attr_mem_info_gtt_total);
107 if (ret) {
108 DRM_ERROR("Failed to create device file mem_info_gtt_total\n");
109 return ret;
110 }
111 ret = device_create_file(adev->dev, &dev_attr_mem_info_gtt_used);
112 if (ret) {
113 DRM_ERROR("Failed to create device file mem_info_gtt_used\n");
114 return ret;
115 }
116
117 return 0;
118}
119
120/**
121 * amdgpu_gtt_mgr_fini - free and destroy GTT manager
122 *
123 * @man: TTM memory type manager
124 *
125 * Destroy and free the GTT manager, returns -EBUSY if ranges are still
126 * allocated inside it.
127 */
128static int amdgpu_gtt_mgr_fini(struct ttm_mem_type_manager *man)
129{
130 struct amdgpu_device *adev = amdgpu_ttm_adev(man->bdev);
131 struct amdgpu_gtt_mgr *mgr = man->priv;
132 spin_lock(&mgr->lock);
133 drm_mm_takedown(&mgr->mm);
134 spin_unlock(&mgr->lock);
135 kfree(mgr);
136 man->priv = NULL;
137
138 device_remove_file(adev->dev, &dev_attr_mem_info_gtt_total);
139 device_remove_file(adev->dev, &dev_attr_mem_info_gtt_used);
140
141 return 0;
142}
143
144/**
145 * amdgpu_gtt_mgr_has_gart_addr - Check if mem has address space
146 *
147 * @mem: the mem object to check
148 *
149 * Check if a mem object has already address space allocated.
150 */
151bool amdgpu_gtt_mgr_has_gart_addr(struct ttm_mem_reg *mem)
152{
153 return mem->mm_node != NULL;
154}
155
156/**
157 * amdgpu_gtt_mgr_new - allocate a new node
158 *
159 * @man: TTM memory type manager
160 * @tbo: TTM BO we need this range for
161 * @place: placement flags and restrictions
162 * @mem: the resulting mem object
163 *
164 * Dummy, allocate the node but no space for it yet.
165 */
166static int amdgpu_gtt_mgr_new(struct ttm_mem_type_manager *man,
167 struct ttm_buffer_object *tbo,
168 const struct ttm_place *place,
169 struct ttm_mem_reg *mem)
170{
171 struct amdgpu_gtt_mgr *mgr = man->priv;
172 struct amdgpu_gtt_node *node;
173 int r;
174
175 spin_lock(&mgr->lock);
176 if ((&tbo->mem == mem || tbo->mem.mem_type != TTM_PL_TT) &&
177 atomic64_read(&mgr->available) < mem->num_pages) {
178 spin_unlock(&mgr->lock);
179 return -ENOSPC;
180 }
181 atomic64_sub(mem->num_pages, &mgr->available);
182 spin_unlock(&mgr->lock);
183
184 if (!place->lpfn) {
185 mem->mm_node = NULL;
186 mem->start = AMDGPU_BO_INVALID_OFFSET;
187 return 0;
188 }
189
190 node = kzalloc(sizeof(*node), GFP_KERNEL);
191 if (!node) {
192 r = -ENOMEM;
193 goto err_out;
194 }
195
196 node->tbo = tbo;
197
198 spin_lock(&mgr->lock);
199 r = drm_mm_insert_node_in_range(&mgr->mm, &node->node, mem->num_pages,
200 mem->page_alignment, 0, place->fpfn,
201 place->lpfn, DRM_MM_INSERT_BEST);
202 spin_unlock(&mgr->lock);
203
204 if (unlikely(r))
205 goto err_free;
206
207 mem->mm_node = node;
208 mem->start = node->node.start;
209
210 return 0;
211
212err_free:
213 kfree(node);
214
215err_out:
216 atomic64_add(mem->num_pages, &mgr->available);
217
218 return r;
219}
220
221/**
222 * amdgpu_gtt_mgr_del - free ranges
223 *
224 * @man: TTM memory type manager
225 * @mem: TTM memory object
226 *
227 * Free the allocated GTT again.
228 */
229static void amdgpu_gtt_mgr_del(struct ttm_mem_type_manager *man,
230 struct ttm_mem_reg *mem)
231{
232 struct amdgpu_gtt_mgr *mgr = man->priv;
233 struct amdgpu_gtt_node *node = mem->mm_node;
234
235 if (node) {
236 spin_lock(&mgr->lock);
237 drm_mm_remove_node(&node->node);
238 spin_unlock(&mgr->lock);
239 kfree(node);
240 }
241
242 atomic64_add(mem->num_pages, &mgr->available);
243}
244
245/**
246 * amdgpu_gtt_mgr_usage - return usage of GTT domain
247 *
248 * @man: TTM memory type manager
249 *
250 * Return how many bytes are used in the GTT domain
251 */
252uint64_t amdgpu_gtt_mgr_usage(struct ttm_mem_type_manager *man)
253{
254 struct amdgpu_gtt_mgr *mgr = man->priv;
255 s64 result = man->size - atomic64_read(&mgr->available);
256
257 return (result > 0 ? result : 0) * PAGE_SIZE;
258}
259
260int amdgpu_gtt_mgr_recover(struct ttm_mem_type_manager *man)
261{
262 struct amdgpu_gtt_mgr *mgr = man->priv;
263 struct amdgpu_gtt_node *node;
264 struct drm_mm_node *mm_node;
265 int r = 0;
266
267 spin_lock(&mgr->lock);
268 drm_mm_for_each_node(mm_node, &mgr->mm) {
269 node = container_of(mm_node, struct amdgpu_gtt_node, node);
270 r = amdgpu_ttm_recover_gart(node->tbo);
271 if (r)
272 break;
273 }
274 spin_unlock(&mgr->lock);
275
276 return r;
277}
278
279/**
280 * amdgpu_gtt_mgr_debug - dump VRAM table
281 *
282 * @man: TTM memory type manager
283 * @printer: DRM printer to use
284 *
285 * Dump the table content using printk.
286 */
287static void amdgpu_gtt_mgr_debug(struct ttm_mem_type_manager *man,
288 struct drm_printer *printer)
289{
290 struct amdgpu_gtt_mgr *mgr = man->priv;
291
292 spin_lock(&mgr->lock);
293 drm_mm_print(&mgr->mm, printer);
294 spin_unlock(&mgr->lock);
295
296 drm_printf(printer, "man size:%llu pages, gtt available:%lld pages, usage:%lluMB\n",
297 man->size, (u64)atomic64_read(&mgr->available),
298 amdgpu_gtt_mgr_usage(man) >> 20);
299}
300
301const struct ttm_mem_type_manager_func amdgpu_gtt_mgr_func = {
302 .init = amdgpu_gtt_mgr_init,
303 .takedown = amdgpu_gtt_mgr_fini,
304 .get_node = amdgpu_gtt_mgr_new,
305 .put_node = amdgpu_gtt_mgr_del,
306 .debug = amdgpu_gtt_mgr_debug
307};
1/*
2 * Copyright 2016 Advanced Micro Devices, Inc.
3 *
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:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
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.
21 *
22 * Authors: Christian König
23 */
24
25#include <drm/ttm/ttm_range_manager.h>
26
27#include "amdgpu.h"
28
29struct amdgpu_gtt_node {
30 struct ttm_buffer_object *tbo;
31 struct ttm_range_mgr_node base;
32};
33
34static inline struct amdgpu_gtt_mgr *
35to_gtt_mgr(struct ttm_resource_manager *man)
36{
37 return container_of(man, struct amdgpu_gtt_mgr, manager);
38}
39
40static inline struct amdgpu_gtt_node *
41to_amdgpu_gtt_node(struct ttm_resource *res)
42{
43 return container_of(res, struct amdgpu_gtt_node, base.base);
44}
45
46/**
47 * DOC: mem_info_gtt_total
48 *
49 * The amdgpu driver provides a sysfs API for reporting current total size of
50 * the GTT.
51 * The file mem_info_gtt_total is used for this, and returns the total size of
52 * the GTT block, in bytes
53 */
54static ssize_t amdgpu_mem_info_gtt_total_show(struct device *dev,
55 struct device_attribute *attr,
56 char *buf)
57{
58 struct drm_device *ddev = dev_get_drvdata(dev);
59 struct amdgpu_device *adev = drm_to_adev(ddev);
60 struct ttm_resource_manager *man;
61
62 man = ttm_manager_type(&adev->mman.bdev, TTM_PL_TT);
63 return sysfs_emit(buf, "%llu\n", man->size * PAGE_SIZE);
64}
65
66/**
67 * DOC: mem_info_gtt_used
68 *
69 * The amdgpu driver provides a sysfs API for reporting current total amount of
70 * used GTT.
71 * The file mem_info_gtt_used is used for this, and returns the current used
72 * size of the GTT block, in bytes
73 */
74static ssize_t amdgpu_mem_info_gtt_used_show(struct device *dev,
75 struct device_attribute *attr,
76 char *buf)
77{
78 struct drm_device *ddev = dev_get_drvdata(dev);
79 struct amdgpu_device *adev = drm_to_adev(ddev);
80 struct ttm_resource_manager *man;
81
82 man = ttm_manager_type(&adev->mman.bdev, TTM_PL_TT);
83 return sysfs_emit(buf, "%llu\n", amdgpu_gtt_mgr_usage(man));
84}
85
86static DEVICE_ATTR(mem_info_gtt_total, S_IRUGO,
87 amdgpu_mem_info_gtt_total_show, NULL);
88static DEVICE_ATTR(mem_info_gtt_used, S_IRUGO,
89 amdgpu_mem_info_gtt_used_show, NULL);
90
91static struct attribute *amdgpu_gtt_mgr_attributes[] = {
92 &dev_attr_mem_info_gtt_total.attr,
93 &dev_attr_mem_info_gtt_used.attr,
94 NULL
95};
96
97const struct attribute_group amdgpu_gtt_mgr_attr_group = {
98 .attrs = amdgpu_gtt_mgr_attributes
99};
100
101/**
102 * amdgpu_gtt_mgr_has_gart_addr - Check if mem has address space
103 *
104 * @res: the mem object to check
105 *
106 * Check if a mem object has already address space allocated.
107 */
108bool amdgpu_gtt_mgr_has_gart_addr(struct ttm_resource *res)
109{
110 struct amdgpu_gtt_node *node = to_amdgpu_gtt_node(res);
111
112 return drm_mm_node_allocated(&node->base.mm_nodes[0]);
113}
114
115/**
116 * amdgpu_gtt_mgr_new - allocate a new node
117 *
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
122 *
123 * Dummy, allocate the node but no space for it yet.
124 */
125static 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)
129{
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;
133 int r;
134
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);
139 return -ENOSPC;
140 }
141 atomic64_sub(num_pages, &mgr->available);
142 spin_unlock(&mgr->lock);
143
144 node = kzalloc(struct_size(node, base.mm_nodes, 1), GFP_KERNEL);
145 if (!node) {
146 r = -ENOMEM;
147 goto err_out;
148 }
149
150 node->tbo = tbo;
151 ttm_resource_init(tbo, place, &node->base.base);
152
153 if (place->lpfn) {
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,
159 DRM_MM_INSERT_BEST);
160 spin_unlock(&mgr->lock);
161 if (unlikely(r))
162 goto err_free;
163
164 node->base.base.start = node->base.mm_nodes[0].start;
165 } else {
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;
169 }
170
171 *res = &node->base.base;
172 return 0;
173
174err_free:
175 kfree(node);
176
177err_out:
178 atomic64_add(num_pages, &mgr->available);
179
180 return r;
181}
182
183/**
184 * amdgpu_gtt_mgr_del - free ranges
185 *
186 * @man: TTM memory type manager
187 * @mem: TTM memory object
188 *
189 * Free the allocated GTT again.
190 */
191static void amdgpu_gtt_mgr_del(struct ttm_resource_manager *man,
192 struct ttm_resource *res)
193{
194 struct amdgpu_gtt_node *node = to_amdgpu_gtt_node(res);
195 struct amdgpu_gtt_mgr *mgr = to_gtt_mgr(man);
196
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);
202
203 kfree(node);
204}
205
206/**
207 * amdgpu_gtt_mgr_usage - return usage of GTT domain
208 *
209 * @man: TTM memory type manager
210 *
211 * Return how many bytes are used in the GTT domain
212 */
213uint64_t amdgpu_gtt_mgr_usage(struct ttm_resource_manager *man)
214{
215 struct amdgpu_gtt_mgr *mgr = to_gtt_mgr(man);
216 s64 result = man->size - atomic64_read(&mgr->available);
217
218 return (result > 0 ? result : 0) * PAGE_SIZE;
219}
220
221/**
222 * amdgpu_gtt_mgr_recover - re-init gart
223 *
224 * @man: TTM memory type manager
225 *
226 * Re-init the gart for each known BO in the GTT.
227 */
228int amdgpu_gtt_mgr_recover(struct ttm_resource_manager *man)
229{
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;
234 int r = 0;
235
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);
241 if (r)
242 break;
243 }
244 spin_unlock(&mgr->lock);
245
246 amdgpu_gart_invalidate_tlb(adev);
247
248 return r;
249}
250
251/**
252 * amdgpu_gtt_mgr_debug - dump VRAM table
253 *
254 * @man: TTM memory type manager
255 * @printer: DRM printer to use
256 *
257 * Dump the table content using printk.
258 */
259static void amdgpu_gtt_mgr_debug(struct ttm_resource_manager *man,
260 struct drm_printer *printer)
261{
262 struct amdgpu_gtt_mgr *mgr = to_gtt_mgr(man);
263
264 spin_lock(&mgr->lock);
265 drm_mm_print(&mgr->mm, printer);
266 spin_unlock(&mgr->lock);
267
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);
271}
272
273static 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
277};
278
279/**
280 * amdgpu_gtt_mgr_init - init GTT manager and DRM MM
281 *
282 * @adev: amdgpu_device pointer
283 * @gtt_size: maximum size of GTT
284 *
285 * Allocate and initialize the GTT manager.
286 */
287int amdgpu_gtt_mgr_init(struct amdgpu_device *adev, uint64_t gtt_size)
288{
289 struct amdgpu_gtt_mgr *mgr = &adev->mman.gtt_mgr;
290 struct ttm_resource_manager *man = &mgr->manager;
291 uint64_t start, size;
292
293 man->use_tt = true;
294 man->func = &amdgpu_gtt_mgr_func;
295
296 ttm_resource_manager_init(man, gtt_size >> PAGE_SHIFT);
297
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);
303
304 ttm_set_driver_manager(&adev->mman.bdev, TTM_PL_TT, &mgr->manager);
305 ttm_resource_manager_set_used(man, true);
306 return 0;
307}
308
309/**
310 * amdgpu_gtt_mgr_fini - free and destroy GTT manager
311 *
312 * @adev: amdgpu_device pointer
313 *
314 * Destroy and free the GTT manager, returns -EBUSY if ranges are still
315 * allocated inside it.
316 */
317void amdgpu_gtt_mgr_fini(struct amdgpu_device *adev)
318{
319 struct amdgpu_gtt_mgr *mgr = &adev->mman.gtt_mgr;
320 struct ttm_resource_manager *man = &mgr->manager;
321 int ret;
322
323 ttm_resource_manager_set_used(man, false);
324
325 ret = ttm_resource_manager_evict_all(&adev->mman.bdev, man);
326 if (ret)
327 return;
328
329 spin_lock(&mgr->lock);
330 drm_mm_takedown(&mgr->mm);
331 spin_unlock(&mgr->lock);
332
333 ttm_resource_manager_cleanup(man);
334 ttm_set_driver_manager(&adev->mman.bdev, TTM_PL_TT, NULL);
335}