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Diffstat (limited to 'drivers/gpu/drm/drm_sman.c')
-rw-r--r--drivers/gpu/drm/drm_sman.c353
1 files changed, 353 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_sman.c b/drivers/gpu/drm/drm_sman.c
new file mode 100644
index 000000000000..926f146390ce
--- /dev/null
+++ b/drivers/gpu/drm/drm_sman.c
@@ -0,0 +1,353 @@
1/**************************************************************************
2 *
3 * Copyright 2006 Tungsten Graphics, Inc., Bismarck., ND., USA.
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
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 NON-INFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
18 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
19 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
20 * USE OR OTHER DEALINGS IN THE SOFTWARE.
21 *
22 * The above copyright notice and this permission notice (including the
23 * next paragraph) shall be included in all copies or substantial portions
24 * of the Software.
25 *
26 *
27 **************************************************************************/
28/*
29 * Simple memory manager interface that keeps track on allocate regions on a
30 * per "owner" basis. All regions associated with an "owner" can be released
31 * with a simple call. Typically if the "owner" exists. The owner is any
32 * "unsigned long" identifier. Can typically be a pointer to a file private
33 * struct or a context identifier.
34 *
35 * Authors:
36 * Thomas Hellström <thomas-at-tungstengraphics-dot-com>
37 */
38
39#include "drm_sman.h"
40
41struct drm_owner_item {
42 struct drm_hash_item owner_hash;
43 struct list_head sman_list;
44 struct list_head mem_blocks;
45};
46
47void drm_sman_takedown(struct drm_sman * sman)
48{
49 drm_ht_remove(&sman->user_hash_tab);
50 drm_ht_remove(&sman->owner_hash_tab);
51 if (sman->mm)
52 drm_free(sman->mm, sman->num_managers * sizeof(*sman->mm),
53 DRM_MEM_MM);
54}
55
56EXPORT_SYMBOL(drm_sman_takedown);
57
58int
59drm_sman_init(struct drm_sman * sman, unsigned int num_managers,
60 unsigned int user_order, unsigned int owner_order)
61{
62 int ret = 0;
63
64 sman->mm = (struct drm_sman_mm *) drm_calloc(num_managers, sizeof(*sman->mm),
65 DRM_MEM_MM);
66 if (!sman->mm) {
67 ret = -ENOMEM;
68 goto out;
69 }
70 sman->num_managers = num_managers;
71 INIT_LIST_HEAD(&sman->owner_items);
72 ret = drm_ht_create(&sman->owner_hash_tab, owner_order);
73 if (ret)
74 goto out1;
75 ret = drm_ht_create(&sman->user_hash_tab, user_order);
76 if (!ret)
77 goto out;
78
79 drm_ht_remove(&sman->owner_hash_tab);
80out1:
81 drm_free(sman->mm, num_managers * sizeof(*sman->mm), DRM_MEM_MM);
82out:
83 return ret;
84}
85
86EXPORT_SYMBOL(drm_sman_init);
87
88static void *drm_sman_mm_allocate(void *private, unsigned long size,
89 unsigned alignment)
90{
91 struct drm_mm *mm = (struct drm_mm *) private;
92 struct drm_mm_node *tmp;
93
94 tmp = drm_mm_search_free(mm, size, alignment, 1);
95 if (!tmp) {
96 return NULL;
97 }
98 tmp = drm_mm_get_block(tmp, size, alignment);
99 return tmp;
100}
101
102static void drm_sman_mm_free(void *private, void *ref)
103{
104 struct drm_mm_node *node = (struct drm_mm_node *) ref;
105
106 drm_mm_put_block(node);
107}
108
109static void drm_sman_mm_destroy(void *private)
110{
111 struct drm_mm *mm = (struct drm_mm *) private;
112 drm_mm_takedown(mm);
113 drm_free(mm, sizeof(*mm), DRM_MEM_MM);
114}
115
116static unsigned long drm_sman_mm_offset(void *private, void *ref)
117{
118 struct drm_mm_node *node = (struct drm_mm_node *) ref;
119 return node->start;
120}
121
122int
123drm_sman_set_range(struct drm_sman * sman, unsigned int manager,
124 unsigned long start, unsigned long size)
125{
126 struct drm_sman_mm *sman_mm;
127 struct drm_mm *mm;
128 int ret;
129
130 BUG_ON(manager >= sman->num_managers);
131
132 sman_mm = &sman->mm[manager];
133 mm = drm_calloc(1, sizeof(*mm), DRM_MEM_MM);
134 if (!mm) {
135 return -ENOMEM;
136 }
137 sman_mm->private = mm;
138 ret = drm_mm_init(mm, start, size);
139
140 if (ret) {
141 drm_free(mm, sizeof(*mm), DRM_MEM_MM);
142 return ret;
143 }
144
145 sman_mm->allocate = drm_sman_mm_allocate;
146 sman_mm->free = drm_sman_mm_free;
147 sman_mm->destroy = drm_sman_mm_destroy;
148 sman_mm->offset = drm_sman_mm_offset;
149
150 return 0;
151}
152
153EXPORT_SYMBOL(drm_sman_set_range);
154
155int
156drm_sman_set_manager(struct drm_sman * sman, unsigned int manager,
157 struct drm_sman_mm * allocator)
158{
159 BUG_ON(manager >= sman->num_managers);
160 sman->mm[manager] = *allocator;
161
162 return 0;
163}
164EXPORT_SYMBOL(drm_sman_set_manager);
165
166static struct drm_owner_item *drm_sman_get_owner_item(struct drm_sman * sman,
167 unsigned long owner)
168{
169 int ret;
170 struct drm_hash_item *owner_hash_item;
171 struct drm_owner_item *owner_item;
172
173 ret = drm_ht_find_item(&sman->owner_hash_tab, owner, &owner_hash_item);
174 if (!ret) {
175 return drm_hash_entry(owner_hash_item, struct drm_owner_item,
176 owner_hash);
177 }
178
179 owner_item = drm_calloc(1, sizeof(*owner_item), DRM_MEM_MM);
180 if (!owner_item)
181 goto out;
182
183 INIT_LIST_HEAD(&owner_item->mem_blocks);
184 owner_item->owner_hash.key = owner;
185 if (drm_ht_insert_item(&sman->owner_hash_tab, &owner_item->owner_hash))
186 goto out1;
187
188 list_add_tail(&owner_item->sman_list, &sman->owner_items);
189 return owner_item;
190
191out1:
192 drm_free(owner_item, sizeof(*owner_item), DRM_MEM_MM);
193out:
194 return NULL;
195}
196
197struct drm_memblock_item *drm_sman_alloc(struct drm_sman *sman, unsigned int manager,
198 unsigned long size, unsigned alignment,
199 unsigned long owner)
200{
201 void *tmp;
202 struct drm_sman_mm *sman_mm;
203 struct drm_owner_item *owner_item;
204 struct drm_memblock_item *memblock;
205
206 BUG_ON(manager >= sman->num_managers);
207
208 sman_mm = &sman->mm[manager];
209 tmp = sman_mm->allocate(sman_mm->private, size, alignment);
210
211 if (!tmp) {
212 return NULL;
213 }
214
215 memblock = drm_calloc(1, sizeof(*memblock), DRM_MEM_MM);
216
217 if (!memblock)
218 goto out;
219
220 memblock->mm_info = tmp;
221 memblock->mm = sman_mm;
222 memblock->sman = sman;
223
224 if (drm_ht_just_insert_please
225 (&sman->user_hash_tab, &memblock->user_hash,
226 (unsigned long)memblock, 32, 0, 0))
227 goto out1;
228
229 owner_item = drm_sman_get_owner_item(sman, owner);
230 if (!owner_item)
231 goto out2;
232
233 list_add_tail(&memblock->owner_list, &owner_item->mem_blocks);
234
235 return memblock;
236
237out2:
238 drm_ht_remove_item(&sman->user_hash_tab, &memblock->user_hash);
239out1:
240 drm_free(memblock, sizeof(*memblock), DRM_MEM_MM);
241out:
242 sman_mm->free(sman_mm->private, tmp);
243
244 return NULL;
245}
246
247EXPORT_SYMBOL(drm_sman_alloc);
248
249static void drm_sman_free(struct drm_memblock_item *item)
250{
251 struct drm_sman *sman = item->sman;
252
253 list_del(&item->owner_list);
254 drm_ht_remove_item(&sman->user_hash_tab, &item->user_hash);
255 item->mm->free(item->mm->private, item->mm_info);
256 drm_free(item, sizeof(*item), DRM_MEM_MM);
257}
258
259int drm_sman_free_key(struct drm_sman *sman, unsigned int key)
260{
261 struct drm_hash_item *hash_item;
262 struct drm_memblock_item *memblock_item;
263
264 if (drm_ht_find_item(&sman->user_hash_tab, key, &hash_item))
265 return -EINVAL;
266
267 memblock_item = drm_hash_entry(hash_item, struct drm_memblock_item,
268 user_hash);
269 drm_sman_free(memblock_item);
270 return 0;
271}
272
273EXPORT_SYMBOL(drm_sman_free_key);
274
275static void drm_sman_remove_owner(struct drm_sman *sman,
276 struct drm_owner_item *owner_item)
277{
278 list_del(&owner_item->sman_list);
279 drm_ht_remove_item(&sman->owner_hash_tab, &owner_item->owner_hash);
280 drm_free(owner_item, sizeof(*owner_item), DRM_MEM_MM);
281}
282
283int drm_sman_owner_clean(struct drm_sman *sman, unsigned long owner)
284{
285
286 struct drm_hash_item *hash_item;
287 struct drm_owner_item *owner_item;
288
289 if (drm_ht_find_item(&sman->owner_hash_tab, owner, &hash_item)) {
290 return -1;
291 }
292
293 owner_item = drm_hash_entry(hash_item, struct drm_owner_item, owner_hash);
294 if (owner_item->mem_blocks.next == &owner_item->mem_blocks) {
295 drm_sman_remove_owner(sman, owner_item);
296 return -1;
297 }
298
299 return 0;
300}
301
302EXPORT_SYMBOL(drm_sman_owner_clean);
303
304static void drm_sman_do_owner_cleanup(struct drm_sman *sman,
305 struct drm_owner_item *owner_item)
306{
307 struct drm_memblock_item *entry, *next;
308
309 list_for_each_entry_safe(entry, next, &owner_item->mem_blocks,
310 owner_list) {
311 drm_sman_free(entry);
312 }
313 drm_sman_remove_owner(sman, owner_item);
314}
315
316void drm_sman_owner_cleanup(struct drm_sman *sman, unsigned long owner)
317{
318
319 struct drm_hash_item *hash_item;
320 struct drm_owner_item *owner_item;
321
322 if (drm_ht_find_item(&sman->owner_hash_tab, owner, &hash_item)) {
323
324 return;
325 }
326
327 owner_item = drm_hash_entry(hash_item, struct drm_owner_item, owner_hash);
328 drm_sman_do_owner_cleanup(sman, owner_item);
329}
330
331EXPORT_SYMBOL(drm_sman_owner_cleanup);
332
333void drm_sman_cleanup(struct drm_sman *sman)
334{
335 struct drm_owner_item *entry, *next;
336 unsigned int i;
337 struct drm_sman_mm *sman_mm;
338
339 list_for_each_entry_safe(entry, next, &sman->owner_items, sman_list) {
340 drm_sman_do_owner_cleanup(sman, entry);
341 }
342 if (sman->mm) {
343 for (i = 0; i < sman->num_managers; ++i) {
344 sman_mm = &sman->mm[i];
345 if (sman_mm->private) {
346 sman_mm->destroy(sman_mm->private);
347 sman_mm->private = NULL;
348 }
349 }
350 }
351}
352
353EXPORT_SYMBOL(drm_sman_cleanup);