Loading...
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/drmP.h>
26#include "amdgpu.h"
27
28struct amdgpu_vram_mgr {
29 struct drm_mm mm;
30 spinlock_t lock;
31 atomic64_t usage;
32 atomic64_t vis_usage;
33};
34
35/**
36 * amdgpu_vram_mgr_init - init VRAM manager and DRM MM
37 *
38 * @man: TTM memory type manager
39 * @p_size: maximum size of VRAM
40 *
41 * Allocate and initialize the VRAM manager.
42 */
43static int amdgpu_vram_mgr_init(struct ttm_mem_type_manager *man,
44 unsigned long p_size)
45{
46 struct amdgpu_vram_mgr *mgr;
47
48 mgr = kzalloc(sizeof(*mgr), GFP_KERNEL);
49 if (!mgr)
50 return -ENOMEM;
51
52 drm_mm_init(&mgr->mm, 0, p_size);
53 spin_lock_init(&mgr->lock);
54 man->priv = mgr;
55 return 0;
56}
57
58/**
59 * amdgpu_vram_mgr_fini - free and destroy VRAM manager
60 *
61 * @man: TTM memory type manager
62 *
63 * Destroy and free the VRAM manager, returns -EBUSY if ranges are still
64 * allocated inside it.
65 */
66static int amdgpu_vram_mgr_fini(struct ttm_mem_type_manager *man)
67{
68 struct amdgpu_vram_mgr *mgr = man->priv;
69
70 spin_lock(&mgr->lock);
71 drm_mm_takedown(&mgr->mm);
72 spin_unlock(&mgr->lock);
73 kfree(mgr);
74 man->priv = NULL;
75 return 0;
76}
77
78/**
79 * amdgpu_vram_mgr_vis_size - Calculate visible node size
80 *
81 * @adev: amdgpu device structure
82 * @node: MM node structure
83 *
84 * Calculate how many bytes of the MM node are inside visible VRAM
85 */
86static u64 amdgpu_vram_mgr_vis_size(struct amdgpu_device *adev,
87 struct drm_mm_node *node)
88{
89 uint64_t start = node->start << PAGE_SHIFT;
90 uint64_t end = (node->size + node->start) << PAGE_SHIFT;
91
92 if (start >= adev->gmc.visible_vram_size)
93 return 0;
94
95 return (end > adev->gmc.visible_vram_size ?
96 adev->gmc.visible_vram_size : end) - start;
97}
98
99/**
100 * amdgpu_vram_mgr_new - allocate new ranges
101 *
102 * @man: TTM memory type manager
103 * @tbo: TTM BO we need this range for
104 * @place: placement flags and restrictions
105 * @mem: the resulting mem object
106 *
107 * Allocate VRAM for the given BO.
108 */
109static int amdgpu_vram_mgr_new(struct ttm_mem_type_manager *man,
110 struct ttm_buffer_object *tbo,
111 const struct ttm_place *place,
112 struct ttm_mem_reg *mem)
113{
114 struct amdgpu_device *adev = amdgpu_ttm_adev(man->bdev);
115 struct amdgpu_vram_mgr *mgr = man->priv;
116 struct drm_mm *mm = &mgr->mm;
117 struct drm_mm_node *nodes;
118 enum drm_mm_insert_mode mode;
119 unsigned long lpfn, num_nodes, pages_per_node, pages_left;
120 uint64_t usage = 0, vis_usage = 0;
121 unsigned i;
122 int r;
123
124 lpfn = place->lpfn;
125 if (!lpfn)
126 lpfn = man->size;
127
128 if (place->flags & TTM_PL_FLAG_CONTIGUOUS ||
129 amdgpu_vram_page_split == -1) {
130 pages_per_node = ~0ul;
131 num_nodes = 1;
132 } else {
133 pages_per_node = max((uint32_t)amdgpu_vram_page_split,
134 mem->page_alignment);
135 num_nodes = DIV_ROUND_UP(mem->num_pages, pages_per_node);
136 }
137
138 nodes = kcalloc(num_nodes, sizeof(*nodes), GFP_KERNEL);
139 if (!nodes)
140 return -ENOMEM;
141
142 mode = DRM_MM_INSERT_BEST;
143 if (place->flags & TTM_PL_FLAG_TOPDOWN)
144 mode = DRM_MM_INSERT_HIGH;
145
146 mem->start = 0;
147 pages_left = mem->num_pages;
148
149 spin_lock(&mgr->lock);
150 for (i = 0; i < num_nodes; ++i) {
151 unsigned long pages = min(pages_left, pages_per_node);
152 uint32_t alignment = mem->page_alignment;
153 unsigned long start;
154
155 if (pages == pages_per_node)
156 alignment = pages_per_node;
157
158 r = drm_mm_insert_node_in_range(mm, &nodes[i],
159 pages, alignment, 0,
160 place->fpfn, lpfn,
161 mode);
162 if (unlikely(r))
163 goto error;
164
165 usage += nodes[i].size << PAGE_SHIFT;
166 vis_usage += amdgpu_vram_mgr_vis_size(adev, &nodes[i]);
167
168 /* Calculate a virtual BO start address to easily check if
169 * everything is CPU accessible.
170 */
171 start = nodes[i].start + nodes[i].size;
172 if (start > mem->num_pages)
173 start -= mem->num_pages;
174 else
175 start = 0;
176 mem->start = max(mem->start, start);
177 pages_left -= pages;
178 }
179 spin_unlock(&mgr->lock);
180
181 atomic64_add(usage, &mgr->usage);
182 atomic64_add(vis_usage, &mgr->vis_usage);
183
184 mem->mm_node = nodes;
185
186 return 0;
187
188error:
189 while (i--)
190 drm_mm_remove_node(&nodes[i]);
191 spin_unlock(&mgr->lock);
192
193 kfree(nodes);
194 return r == -ENOSPC ? 0 : r;
195}
196
197/**
198 * amdgpu_vram_mgr_del - free ranges
199 *
200 * @man: TTM memory type manager
201 * @tbo: TTM BO we need this range for
202 * @place: placement flags and restrictions
203 * @mem: TTM memory object
204 *
205 * Free the allocated VRAM again.
206 */
207static void amdgpu_vram_mgr_del(struct ttm_mem_type_manager *man,
208 struct ttm_mem_reg *mem)
209{
210 struct amdgpu_device *adev = amdgpu_ttm_adev(man->bdev);
211 struct amdgpu_vram_mgr *mgr = man->priv;
212 struct drm_mm_node *nodes = mem->mm_node;
213 uint64_t usage = 0, vis_usage = 0;
214 unsigned pages = mem->num_pages;
215
216 if (!mem->mm_node)
217 return;
218
219 spin_lock(&mgr->lock);
220 while (pages) {
221 pages -= nodes->size;
222 drm_mm_remove_node(nodes);
223 usage += nodes->size << PAGE_SHIFT;
224 vis_usage += amdgpu_vram_mgr_vis_size(adev, nodes);
225 ++nodes;
226 }
227 spin_unlock(&mgr->lock);
228
229 atomic64_sub(usage, &mgr->usage);
230 atomic64_sub(vis_usage, &mgr->vis_usage);
231
232 kfree(mem->mm_node);
233 mem->mm_node = NULL;
234}
235
236/**
237 * amdgpu_vram_mgr_usage - how many bytes are used in this domain
238 *
239 * @man: TTM memory type manager
240 *
241 * Returns how many bytes are used in this domain.
242 */
243uint64_t amdgpu_vram_mgr_usage(struct ttm_mem_type_manager *man)
244{
245 struct amdgpu_vram_mgr *mgr = man->priv;
246
247 return atomic64_read(&mgr->usage);
248}
249
250/**
251 * amdgpu_vram_mgr_vis_usage - how many bytes are used in the visible part
252 *
253 * @man: TTM memory type manager
254 *
255 * Returns how many bytes are used in the visible part of VRAM
256 */
257uint64_t amdgpu_vram_mgr_vis_usage(struct ttm_mem_type_manager *man)
258{
259 struct amdgpu_vram_mgr *mgr = man->priv;
260
261 return atomic64_read(&mgr->vis_usage);
262}
263
264/**
265 * amdgpu_vram_mgr_debug - dump VRAM table
266 *
267 * @man: TTM memory type manager
268 * @printer: DRM printer to use
269 *
270 * Dump the table content using printk.
271 */
272static void amdgpu_vram_mgr_debug(struct ttm_mem_type_manager *man,
273 struct drm_printer *printer)
274{
275 struct amdgpu_vram_mgr *mgr = man->priv;
276
277 spin_lock(&mgr->lock);
278 drm_mm_print(&mgr->mm, printer);
279 spin_unlock(&mgr->lock);
280
281 drm_printf(printer, "man size:%llu pages, ram usage:%lluMB, vis usage:%lluMB\n",
282 man->size, amdgpu_vram_mgr_usage(man) >> 20,
283 amdgpu_vram_mgr_vis_usage(man) >> 20);
284}
285
286const struct ttm_mem_type_manager_func amdgpu_vram_mgr_func = {
287 .init = amdgpu_vram_mgr_init,
288 .takedown = amdgpu_vram_mgr_fini,
289 .get_node = amdgpu_vram_mgr_new,
290 .put_node = amdgpu_vram_mgr_del,
291 .debug = amdgpu_vram_mgr_debug
292};
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_vram_mgr {
28 struct drm_mm mm;
29 spinlock_t lock;
30 atomic64_t usage;
31 atomic64_t vis_usage;
32};
33
34/**
35 * DOC: mem_info_vram_total
36 *
37 * The amdgpu driver provides a sysfs API for reporting current total VRAM
38 * available on the device
39 * The file mem_info_vram_total is used for this and returns the total
40 * amount of VRAM in bytes
41 */
42static ssize_t amdgpu_mem_info_vram_total_show(struct device *dev,
43 struct device_attribute *attr, char *buf)
44{
45 struct drm_device *ddev = dev_get_drvdata(dev);
46 struct amdgpu_device *adev = ddev->dev_private;
47
48 return snprintf(buf, PAGE_SIZE, "%llu\n", adev->gmc.real_vram_size);
49}
50
51/**
52 * DOC: mem_info_vis_vram_total
53 *
54 * The amdgpu driver provides a sysfs API for reporting current total
55 * visible VRAM available on the device
56 * The file mem_info_vis_vram_total is used for this and returns the total
57 * amount of visible VRAM in bytes
58 */
59static ssize_t amdgpu_mem_info_vis_vram_total_show(struct device *dev,
60 struct device_attribute *attr, char *buf)
61{
62 struct drm_device *ddev = dev_get_drvdata(dev);
63 struct amdgpu_device *adev = ddev->dev_private;
64
65 return snprintf(buf, PAGE_SIZE, "%llu\n", adev->gmc.visible_vram_size);
66}
67
68/**
69 * DOC: mem_info_vram_used
70 *
71 * The amdgpu driver provides a sysfs API for reporting current total VRAM
72 * available on the device
73 * The file mem_info_vram_used is used for this and returns the total
74 * amount of currently used VRAM in bytes
75 */
76static ssize_t amdgpu_mem_info_vram_used_show(struct device *dev,
77 struct device_attribute *attr, char *buf)
78{
79 struct drm_device *ddev = dev_get_drvdata(dev);
80 struct amdgpu_device *adev = ddev->dev_private;
81
82 return snprintf(buf, PAGE_SIZE, "%llu\n",
83 amdgpu_vram_mgr_usage(&adev->mman.bdev.man[TTM_PL_VRAM]));
84}
85
86/**
87 * DOC: mem_info_vis_vram_used
88 *
89 * The amdgpu driver provides a sysfs API for reporting current total of
90 * used visible VRAM
91 * The file mem_info_vis_vram_used is used for this and returns the total
92 * amount of currently used visible VRAM in bytes
93 */
94static ssize_t amdgpu_mem_info_vis_vram_used_show(struct device *dev,
95 struct device_attribute *attr, char *buf)
96{
97 struct drm_device *ddev = dev_get_drvdata(dev);
98 struct amdgpu_device *adev = ddev->dev_private;
99
100 return snprintf(buf, PAGE_SIZE, "%llu\n",
101 amdgpu_vram_mgr_vis_usage(&adev->mman.bdev.man[TTM_PL_VRAM]));
102}
103
104static DEVICE_ATTR(mem_info_vram_total, S_IRUGO,
105 amdgpu_mem_info_vram_total_show, NULL);
106static DEVICE_ATTR(mem_info_vis_vram_total, S_IRUGO,
107 amdgpu_mem_info_vis_vram_total_show,NULL);
108static DEVICE_ATTR(mem_info_vram_used, S_IRUGO,
109 amdgpu_mem_info_vram_used_show, NULL);
110static DEVICE_ATTR(mem_info_vis_vram_used, S_IRUGO,
111 amdgpu_mem_info_vis_vram_used_show, NULL);
112
113/**
114 * amdgpu_vram_mgr_init - init VRAM manager and DRM MM
115 *
116 * @man: TTM memory type manager
117 * @p_size: maximum size of VRAM
118 *
119 * Allocate and initialize the VRAM manager.
120 */
121static int amdgpu_vram_mgr_init(struct ttm_mem_type_manager *man,
122 unsigned long p_size)
123{
124 struct amdgpu_device *adev = amdgpu_ttm_adev(man->bdev);
125 struct amdgpu_vram_mgr *mgr;
126 int ret;
127
128 mgr = kzalloc(sizeof(*mgr), GFP_KERNEL);
129 if (!mgr)
130 return -ENOMEM;
131
132 drm_mm_init(&mgr->mm, 0, p_size);
133 spin_lock_init(&mgr->lock);
134 man->priv = mgr;
135
136 /* Add the two VRAM-related sysfs files */
137 ret = device_create_file(adev->dev, &dev_attr_mem_info_vram_total);
138 if (ret) {
139 DRM_ERROR("Failed to create device file mem_info_vram_total\n");
140 return ret;
141 }
142 ret = device_create_file(adev->dev, &dev_attr_mem_info_vis_vram_total);
143 if (ret) {
144 DRM_ERROR("Failed to create device file mem_info_vis_vram_total\n");
145 return ret;
146 }
147 ret = device_create_file(adev->dev, &dev_attr_mem_info_vram_used);
148 if (ret) {
149 DRM_ERROR("Failed to create device file mem_info_vram_used\n");
150 return ret;
151 }
152 ret = device_create_file(adev->dev, &dev_attr_mem_info_vis_vram_used);
153 if (ret) {
154 DRM_ERROR("Failed to create device file mem_info_vis_vram_used\n");
155 return ret;
156 }
157
158 return 0;
159}
160
161/**
162 * amdgpu_vram_mgr_fini - free and destroy VRAM manager
163 *
164 * @man: TTM memory type manager
165 *
166 * Destroy and free the VRAM manager, returns -EBUSY if ranges are still
167 * allocated inside it.
168 */
169static int amdgpu_vram_mgr_fini(struct ttm_mem_type_manager *man)
170{
171 struct amdgpu_device *adev = amdgpu_ttm_adev(man->bdev);
172 struct amdgpu_vram_mgr *mgr = man->priv;
173
174 spin_lock(&mgr->lock);
175 drm_mm_takedown(&mgr->mm);
176 spin_unlock(&mgr->lock);
177 kfree(mgr);
178 man->priv = NULL;
179 device_remove_file(adev->dev, &dev_attr_mem_info_vram_total);
180 device_remove_file(adev->dev, &dev_attr_mem_info_vis_vram_total);
181 device_remove_file(adev->dev, &dev_attr_mem_info_vram_used);
182 device_remove_file(adev->dev, &dev_attr_mem_info_vis_vram_used);
183 return 0;
184}
185
186/**
187 * amdgpu_vram_mgr_vis_size - Calculate visible node size
188 *
189 * @adev: amdgpu device structure
190 * @node: MM node structure
191 *
192 * Calculate how many bytes of the MM node are inside visible VRAM
193 */
194static u64 amdgpu_vram_mgr_vis_size(struct amdgpu_device *adev,
195 struct drm_mm_node *node)
196{
197 uint64_t start = node->start << PAGE_SHIFT;
198 uint64_t end = (node->size + node->start) << PAGE_SHIFT;
199
200 if (start >= adev->gmc.visible_vram_size)
201 return 0;
202
203 return (end > adev->gmc.visible_vram_size ?
204 adev->gmc.visible_vram_size : end) - start;
205}
206
207/**
208 * amdgpu_vram_mgr_bo_visible_size - CPU visible BO size
209 *
210 * @bo: &amdgpu_bo buffer object (must be in VRAM)
211 *
212 * Returns:
213 * How much of the given &amdgpu_bo buffer object lies in CPU visible VRAM.
214 */
215u64 amdgpu_vram_mgr_bo_visible_size(struct amdgpu_bo *bo)
216{
217 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
218 struct ttm_mem_reg *mem = &bo->tbo.mem;
219 struct drm_mm_node *nodes = mem->mm_node;
220 unsigned pages = mem->num_pages;
221 u64 usage;
222
223 if (amdgpu_gmc_vram_full_visible(&adev->gmc))
224 return amdgpu_bo_size(bo);
225
226 if (mem->start >= adev->gmc.visible_vram_size >> PAGE_SHIFT)
227 return 0;
228
229 for (usage = 0; nodes && pages; pages -= nodes->size, nodes++)
230 usage += amdgpu_vram_mgr_vis_size(adev, nodes);
231
232 return usage;
233}
234
235/**
236 * amdgpu_vram_mgr_virt_start - update virtual start address
237 *
238 * @mem: ttm_mem_reg to update
239 * @node: just allocated node
240 *
241 * Calculate a virtual BO start address to easily check if everything is CPU
242 * accessible.
243 */
244static void amdgpu_vram_mgr_virt_start(struct ttm_mem_reg *mem,
245 struct drm_mm_node *node)
246{
247 unsigned long start;
248
249 start = node->start + node->size;
250 if (start > mem->num_pages)
251 start -= mem->num_pages;
252 else
253 start = 0;
254 mem->start = max(mem->start, start);
255}
256
257/**
258 * amdgpu_vram_mgr_new - allocate new ranges
259 *
260 * @man: TTM memory type manager
261 * @tbo: TTM BO we need this range for
262 * @place: placement flags and restrictions
263 * @mem: the resulting mem object
264 *
265 * Allocate VRAM for the given BO.
266 */
267static int amdgpu_vram_mgr_new(struct ttm_mem_type_manager *man,
268 struct ttm_buffer_object *tbo,
269 const struct ttm_place *place,
270 struct ttm_mem_reg *mem)
271{
272 struct amdgpu_device *adev = amdgpu_ttm_adev(man->bdev);
273 struct amdgpu_vram_mgr *mgr = man->priv;
274 struct drm_mm *mm = &mgr->mm;
275 struct drm_mm_node *nodes;
276 enum drm_mm_insert_mode mode;
277 unsigned long lpfn, num_nodes, pages_per_node, pages_left;
278 uint64_t vis_usage = 0, mem_bytes;
279 unsigned i;
280 int r;
281
282 lpfn = place->lpfn;
283 if (!lpfn)
284 lpfn = man->size;
285
286 /* bail out quickly if there's likely not enough VRAM for this BO */
287 mem_bytes = (u64)mem->num_pages << PAGE_SHIFT;
288 if (atomic64_add_return(mem_bytes, &mgr->usage) > adev->gmc.mc_vram_size) {
289 atomic64_sub(mem_bytes, &mgr->usage);
290 mem->mm_node = NULL;
291 return 0;
292 }
293
294 if (place->flags & TTM_PL_FLAG_CONTIGUOUS) {
295 pages_per_node = ~0ul;
296 num_nodes = 1;
297 } else {
298#ifdef CONFIG_TRANSPARENT_HUGEPAGE
299 pages_per_node = HPAGE_PMD_NR;
300#else
301 /* default to 2MB */
302 pages_per_node = (2UL << (20UL - PAGE_SHIFT));
303#endif
304 pages_per_node = max((uint32_t)pages_per_node, mem->page_alignment);
305 num_nodes = DIV_ROUND_UP(mem->num_pages, pages_per_node);
306 }
307
308 nodes = kvmalloc_array((uint32_t)num_nodes, sizeof(*nodes),
309 GFP_KERNEL | __GFP_ZERO);
310 if (!nodes) {
311 atomic64_sub(mem_bytes, &mgr->usage);
312 return -ENOMEM;
313 }
314
315 mode = DRM_MM_INSERT_BEST;
316 if (place->flags & TTM_PL_FLAG_TOPDOWN)
317 mode = DRM_MM_INSERT_HIGH;
318
319 mem->start = 0;
320 pages_left = mem->num_pages;
321
322 spin_lock(&mgr->lock);
323 for (i = 0; pages_left >= pages_per_node; ++i) {
324 unsigned long pages = rounddown_pow_of_two(pages_left);
325
326 r = drm_mm_insert_node_in_range(mm, &nodes[i], pages,
327 pages_per_node, 0,
328 place->fpfn, lpfn,
329 mode);
330 if (unlikely(r))
331 break;
332
333 vis_usage += amdgpu_vram_mgr_vis_size(adev, &nodes[i]);
334 amdgpu_vram_mgr_virt_start(mem, &nodes[i]);
335 pages_left -= pages;
336 }
337
338 for (; pages_left; ++i) {
339 unsigned long pages = min(pages_left, pages_per_node);
340 uint32_t alignment = mem->page_alignment;
341
342 if (pages == pages_per_node)
343 alignment = pages_per_node;
344
345 r = drm_mm_insert_node_in_range(mm, &nodes[i],
346 pages, alignment, 0,
347 place->fpfn, lpfn,
348 mode);
349 if (unlikely(r))
350 goto error;
351
352 vis_usage += amdgpu_vram_mgr_vis_size(adev, &nodes[i]);
353 amdgpu_vram_mgr_virt_start(mem, &nodes[i]);
354 pages_left -= pages;
355 }
356 spin_unlock(&mgr->lock);
357
358 atomic64_add(vis_usage, &mgr->vis_usage);
359
360 mem->mm_node = nodes;
361
362 return 0;
363
364error:
365 while (i--)
366 drm_mm_remove_node(&nodes[i]);
367 spin_unlock(&mgr->lock);
368 atomic64_sub(mem->num_pages << PAGE_SHIFT, &mgr->usage);
369
370 kvfree(nodes);
371 return r == -ENOSPC ? 0 : r;
372}
373
374/**
375 * amdgpu_vram_mgr_del - free ranges
376 *
377 * @man: TTM memory type manager
378 * @tbo: TTM BO we need this range for
379 * @place: placement flags and restrictions
380 * @mem: TTM memory object
381 *
382 * Free the allocated VRAM again.
383 */
384static void amdgpu_vram_mgr_del(struct ttm_mem_type_manager *man,
385 struct ttm_mem_reg *mem)
386{
387 struct amdgpu_device *adev = amdgpu_ttm_adev(man->bdev);
388 struct amdgpu_vram_mgr *mgr = man->priv;
389 struct drm_mm_node *nodes = mem->mm_node;
390 uint64_t usage = 0, vis_usage = 0;
391 unsigned pages = mem->num_pages;
392
393 if (!mem->mm_node)
394 return;
395
396 spin_lock(&mgr->lock);
397 while (pages) {
398 pages -= nodes->size;
399 drm_mm_remove_node(nodes);
400 usage += nodes->size << PAGE_SHIFT;
401 vis_usage += amdgpu_vram_mgr_vis_size(adev, nodes);
402 ++nodes;
403 }
404 spin_unlock(&mgr->lock);
405
406 atomic64_sub(usage, &mgr->usage);
407 atomic64_sub(vis_usage, &mgr->vis_usage);
408
409 kvfree(mem->mm_node);
410 mem->mm_node = NULL;
411}
412
413/**
414 * amdgpu_vram_mgr_usage - how many bytes are used in this domain
415 *
416 * @man: TTM memory type manager
417 *
418 * Returns how many bytes are used in this domain.
419 */
420uint64_t amdgpu_vram_mgr_usage(struct ttm_mem_type_manager *man)
421{
422 struct amdgpu_vram_mgr *mgr = man->priv;
423
424 return atomic64_read(&mgr->usage);
425}
426
427/**
428 * amdgpu_vram_mgr_vis_usage - how many bytes are used in the visible part
429 *
430 * @man: TTM memory type manager
431 *
432 * Returns how many bytes are used in the visible part of VRAM
433 */
434uint64_t amdgpu_vram_mgr_vis_usage(struct ttm_mem_type_manager *man)
435{
436 struct amdgpu_vram_mgr *mgr = man->priv;
437
438 return atomic64_read(&mgr->vis_usage);
439}
440
441/**
442 * amdgpu_vram_mgr_debug - dump VRAM table
443 *
444 * @man: TTM memory type manager
445 * @printer: DRM printer to use
446 *
447 * Dump the table content using printk.
448 */
449static void amdgpu_vram_mgr_debug(struct ttm_mem_type_manager *man,
450 struct drm_printer *printer)
451{
452 struct amdgpu_vram_mgr *mgr = man->priv;
453
454 spin_lock(&mgr->lock);
455 drm_mm_print(&mgr->mm, printer);
456 spin_unlock(&mgr->lock);
457
458 drm_printf(printer, "man size:%llu pages, ram usage:%lluMB, vis usage:%lluMB\n",
459 man->size, amdgpu_vram_mgr_usage(man) >> 20,
460 amdgpu_vram_mgr_vis_usage(man) >> 20);
461}
462
463const struct ttm_mem_type_manager_func amdgpu_vram_mgr_func = {
464 .init = amdgpu_vram_mgr_init,
465 .takedown = amdgpu_vram_mgr_fini,
466 .get_node = amdgpu_vram_mgr_new,
467 .put_node = amdgpu_vram_mgr_del,
468 .debug = amdgpu_vram_mgr_debug
469};