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 #include <sys/cdefs.h>
30 __KERNEL_RCSID(0, "$NetBSD: drm_sman.c,v 1.1 2011/02/18 14:26:09 jmcneill Exp $");
31
32 /*
33 * Simple memory manager interface that keeps track on allocate regions on a
34 * per "owner" basis. All regions associated with an "owner" can be released
35 * with a simple call. Typically if the "owner" exists. The owner is any
36 * "unsigned long" identifier. Can typically be a pointer to a file private
37 * struct or a context identifier.
38 *
39 * Authors:
40 * Thomas Hellström <thomas-at-tungstengraphics-dot-com>
41 */
42
43 #include "drmP.h"
44 #include "drm_sman.h"
45
46 struct drm_owner_item {
47 struct drm_hash_item owner_hash;
48 struct list_head sman_list;
49 struct list_head mem_blocks;
50 };
51
drm_sman_takedown(struct drm_sman * sman)52 void drm_sman_takedown(struct drm_sman * sman)
53 {
54 drm_ht_remove(&sman->user_hash_tab);
55 drm_ht_remove(&sman->owner_hash_tab);
56 if (sman->mm)
57 drm_free(sman->mm, sman->num_managers * sizeof(*sman->mm),
58 DRM_MEM_MM);
59 }
60
61 int
drm_sman_init(struct drm_sman * sman,unsigned int num_managers,unsigned int user_order,unsigned int owner_order)62 drm_sman_init(struct drm_sman * sman, unsigned int num_managers,
63 unsigned int user_order, unsigned int owner_order)
64 {
65 int ret = 0;
66
67 sman->mm = (struct drm_sman_mm *) drm_calloc(num_managers,
68 sizeof(*sman->mm), DRM_MEM_MM);
69 if (!sman->mm) {
70 ret = -ENOMEM;
71 goto out;
72 }
73 sman->num_managers = num_managers;
74 INIT_LIST_HEAD(&sman->owner_items);
75 ret = drm_ht_create(&sman->owner_hash_tab, owner_order);
76 if (ret)
77 goto out1;
78 ret = drm_ht_create(&sman->user_hash_tab, user_order);
79 if (!ret)
80 goto out;
81
82 drm_ht_remove(&sman->owner_hash_tab);
83 out1:
84 drm_free(sman->mm, num_managers * sizeof(*sman->mm), DRM_MEM_MM);
85 out:
86 return ret;
87 }
88
drm_sman_mm_allocate(void * private,unsigned long size,unsigned alignment)89 static void *drm_sman_mm_allocate(void *private, unsigned long size,
90 unsigned alignment)
91 {
92 struct drm_mm *mm = (struct drm_mm *) private;
93 struct drm_mm_node *tmp;
94
95 tmp = drm_mm_search_free(mm, size, alignment, 1);
96 if (!tmp) {
97 return NULL;
98 }
99 /* This could be non-atomic, but we are called from a locked path */
100 tmp = drm_mm_get_block_atomic(tmp, size, alignment);
101 return tmp;
102 }
103
drm_sman_mm_free(void * private,void * ref)104 static void drm_sman_mm_free(void *private, void *ref)
105 {
106 struct drm_mm_node *node = (struct drm_mm_node *) ref;
107
108 drm_mm_put_block(node);
109 }
110
drm_sman_mm_destroy(void * private)111 static void drm_sman_mm_destroy(void *private)
112 {
113 struct drm_mm *mm = (struct drm_mm *) private;
114 drm_mm_takedown(mm);
115 drm_free(mm, sizeof(*mm), DRM_MEM_MM);
116 }
117
drm_sman_mm_offset(void * private,void * ref)118 static unsigned long drm_sman_mm_offset(void *private, void *ref)
119 {
120 struct drm_mm_node *node = (struct drm_mm_node *) ref;
121 return node->start;
122 }
123
124 int
drm_sman_set_range(struct drm_sman * sman,unsigned int manager,unsigned long start,unsigned long size)125 drm_sman_set_range(struct drm_sman * sman, unsigned int manager,
126 unsigned long start, unsigned long size)
127 {
128 struct drm_sman_mm *sman_mm;
129 struct drm_mm *mm;
130 int ret;
131
132 KASSERT(manager < sman->num_managers);
133
134 sman_mm = &sman->mm[manager];
135 mm = malloc(sizeof(*mm), DRM_MEM_MM, M_NOWAIT | M_ZERO);
136 if (!mm) {
137 return -ENOMEM;
138 }
139 sman_mm->private = mm;
140 ret = drm_mm_init(mm, start, size);
141
142 if (ret) {
143 drm_free(mm, sizeof(*mm), DRM_MEM_MM);
144 return ret;
145 }
146
147 sman_mm->allocate = drm_sman_mm_allocate;
148 sman_mm->freem = drm_sman_mm_free;
149 sman_mm->destroy = drm_sman_mm_destroy;
150 sman_mm->offset = drm_sman_mm_offset;
151
152 return 0;
153 }
154
155 int
drm_sman_set_manager(struct drm_sman * sman,unsigned int manager,struct drm_sman_mm * allocator)156 drm_sman_set_manager(struct drm_sman * sman, unsigned int manager,
157 struct drm_sman_mm * allocator)
158 {
159 KASSERT(manager < sman->num_managers);
160 sman->mm[manager] = *allocator;
161
162 return 0;
163 }
164
drm_sman_get_owner_item(struct drm_sman * sman,unsigned long owner)165 static struct drm_owner_item *drm_sman_get_owner_item(struct drm_sman * sman,
166 unsigned long owner)
167 {
168 int ret;
169 struct drm_hash_item *owner_hash_item;
170 struct drm_owner_item *owner_item;
171
172 ret = drm_ht_find_item(&sman->owner_hash_tab, owner, &owner_hash_item);
173 if (!ret) {
174 return drm_hash_entry(owner_hash_item, struct drm_owner_item,
175 owner_hash);
176 }
177
178 owner_item = malloc(sizeof(*owner_item), DRM_MEM_MM, M_NOWAIT | M_ZERO);
179 if (!owner_item)
180 goto out;
181
182 INIT_LIST_HEAD(&owner_item->mem_blocks);
183 owner_item->owner_hash.key = owner;
184 DRM_DEBUG("owner_item = %p, mem_blocks = %p\n", owner_item, &owner_item->mem_blocks);
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
191 out1:
192 drm_free(owner_item, sizeof(*owner_item), DRM_MEM_MM);
193 out:
194 return NULL;
195 }
196
drm_sman_alloc(struct drm_sman * sman,unsigned int manager,unsigned long size,unsigned alignment,unsigned long owner)197 struct 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 KASSERT(manager < sman->num_managers);
207
208 sman_mm = &sman->mm[manager];
209 tmp = sman_mm->allocate(sman_mm->private, size, alignment);
210 if (!tmp) {
211 return NULL;
212 }
213
214 memblock = malloc(sizeof(*memblock), DRM_MEM_MM, M_NOWAIT | M_ZERO);
215 DRM_DEBUG("allocated mem_block %p\n", memblock);
216 if (!memblock)
217 goto out;
218
219 memblock->mm_info = tmp;
220 memblock->mm = sman_mm;
221 memblock->sman = sman;
222 INIT_LIST_HEAD(&memblock->owner_list);
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 DRM_DEBUG("owner_item = %p, mem_blocks = %p\n", owner_item, &owner_item->mem_blocks);
234 DRM_DEBUG("owner_list.prev = %p, mem_blocks.prev = %p\n", memblock->owner_list.prev, owner_item->mem_blocks.prev);
235 DRM_DEBUG("owner_list.next = %p, mem_blocks.next = %p\n", memblock->owner_list.next, owner_item->mem_blocks.next);
236 list_add_tail(&memblock->owner_list, &owner_item->mem_blocks);
237
238 DRM_DEBUG("Complete\n");
239 return memblock;
240
241 out2:
242 drm_ht_remove_item(&sman->user_hash_tab, &memblock->user_hash);
243 out1:
244 drm_free(memblock, sizeof(*memblock), DRM_MEM_MM);
245 out:
246 sman_mm->freem(sman_mm->private, tmp);
247
248 return NULL;
249 }
250
drm_sman_free(struct drm_memblock_item * item)251 static void drm_sman_free(struct drm_memblock_item *item)
252 {
253 struct drm_sman *sman = item->sman;
254
255 list_del(&item->owner_list);
256 drm_ht_remove_item(&sman->user_hash_tab, &item->user_hash);
257 item->mm->freem(item->mm->private, item->mm_info);
258 drm_free(item, sizeof(*item), DRM_MEM_MM);
259 }
260
drm_sman_free_key(struct drm_sman * sman,unsigned int key)261 int drm_sman_free_key(struct drm_sman *sman, unsigned int key)
262 {
263 struct drm_hash_item *hash_item;
264 struct drm_memblock_item *memblock_item;
265
266 if (drm_ht_find_item(&sman->user_hash_tab, key, &hash_item))
267 return -EINVAL;
268
269 memblock_item = drm_hash_entry(hash_item, struct drm_memblock_item,
270 user_hash);
271 drm_sman_free(memblock_item);
272 return 0;
273 }
274
drm_sman_remove_owner(struct drm_sman * sman,struct drm_owner_item * owner_item)275 static 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
drm_sman_owner_clean(struct drm_sman * sman,unsigned long owner)283 int 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 DRM_DEBUG("cleaning owner_item %p\n", owner_item);
295 if (owner_item->mem_blocks.next == &owner_item->mem_blocks) {
296 drm_sman_remove_owner(sman, owner_item);
297 return -1;
298 }
299
300 return 0;
301 }
302
drm_sman_do_owner_cleanup(struct drm_sman * sman,struct drm_owner_item * owner_item)303 static void drm_sman_do_owner_cleanup(struct drm_sman *sman,
304 struct drm_owner_item *owner_item)
305 {
306 struct drm_memblock_item *entry, *next;
307
308 list_for_each_entry_safe(entry, next, &owner_item->mem_blocks,
309 owner_list) {
310 DRM_DEBUG("freeing mem_block %p\n", entry);
311 drm_sman_free(entry);
312 }
313 drm_sman_remove_owner(sman, owner_item);
314 }
315
drm_sman_owner_cleanup(struct drm_sman * sman,unsigned long owner)316 void 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
drm_sman_cleanup(struct drm_sman * sman)331 void drm_sman_cleanup(struct drm_sman *sman)
332 {
333 struct drm_owner_item *entry, *next;
334 unsigned int i;
335 struct drm_sman_mm *sman_mm;
336
337 DRM_DEBUG("sman = %p, owner_items = %p\n",
338 sman, &sman->owner_items);
339 list_for_each_entry_safe(entry, next, &sman->owner_items, sman_list) {
340 DRM_DEBUG("cleaning owner_item = %p\n", entry);
341 drm_sman_do_owner_cleanup(sman, entry);
342 }
343 if (sman->mm) {
344 for (i = 0; i < sman->num_managers; ++i) {
345 sman_mm = &sman->mm[i];
346 if (sman_mm->private) {
347 sman_mm->destroy(sman_mm->private);
348 sman_mm->private = NULL;
349 }
350 }
351 }
352 }
353