pb_bufmgr_mm.c revision 17158c2f00f5bee29ec8239367fd5498f22e4a91 
1/**************************************************************************
2 *
3 * Copyright 2006 Tungsten Graphics, Inc., Cedar Park, Texas.
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 above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 **************************************************************************/
27
28/**
29 * \file
30 * Buffer manager using the old texture memory manager.
31 *
32 * \author Jos� Fonseca <jrfonseca@tungstengraphics.com>
33 */
34
35
36#include "linked_list.h"
37
38#include "pipe/p_defines.h"
39#include "pipe/p_debug.h"
40#include "pipe/p_thread.h"
41#include "pipe/p_util.h"
42#include "util/u_mm.h"
43#include "pb_buffer.h"
44#include "pb_bufmgr.h"
45
46
47/**
48 * Convenience macro (type safe).
49 */
50#define SUPER(__derived) (&(__derived)->base)
51
52
53struct mm_pb_manager
54{
55   struct pb_manager base;
56
57   _glthread_Mutex mutex;
58
59   size_t size;
60   struct mem_block *heap;
61
62   size_t align2;
63
64   struct pb_buffer *buffer;
65   void *map;
66};
67
68
69static INLINE struct mm_pb_manager *
70mm_pb_manager(struct pb_manager *mgr)
71{
72   assert(mgr);
73   return (struct mm_pb_manager *)mgr;
74}
75
76
77struct mm_buffer
78{
79   struct pb_buffer base;
80
81   struct mm_pb_manager *mgr;
82
83   struct mem_block *block;
84};
85
86
87static INLINE struct mm_buffer *
88mm_buffer(struct pb_buffer *buf)
89{
90   assert(buf);
91   return (struct mm_buffer *)buf;
92}
93
94
95static void
96mm_buffer_destroy(struct pb_buffer *buf)
97{
98   struct mm_buffer *mm_buf = mm_buffer(buf);
99   struct mm_pb_manager *mm = mm_buf->mgr;
100
101   assert(buf->base.refcount == 0);
102
103   _glthread_LOCK_MUTEX(mm->mutex);
104   mmFreeMem(mm_buf->block);
105   FREE(buf);
106   _glthread_UNLOCK_MUTEX(mm->mutex);
107}
108
109
110static void *
111mm_buffer_map(struct pb_buffer *buf,
112              unsigned flags)
113{
114   struct mm_buffer *mm_buf = mm_buffer(buf);
115   struct mm_pb_manager *mm = mm_buf->mgr;
116
117   return (unsigned char *) mm->map + mm_buf->block->ofs;
118}
119
120
121static void
122mm_buffer_unmap(struct pb_buffer *buf)
123{
124   /* No-op */
125}
126
127
128static void
129mm_buffer_get_base_buffer(struct pb_buffer *buf,
130                          struct pb_buffer **base_buf,
131                          unsigned *offset)
132{
133   struct mm_buffer *mm_buf = mm_buffer(buf);
134   struct mm_pb_manager *mm = mm_buf->mgr;
135   pb_get_base_buffer(mm->buffer, base_buf, offset);
136   *offset += mm_buf->block->ofs;
137}
138
139
140static const struct pb_vtbl
141mm_buffer_vtbl = {
142      mm_buffer_destroy,
143      mm_buffer_map,
144      mm_buffer_unmap,
145      mm_buffer_get_base_buffer
146};
147
148
149static struct pb_buffer *
150mm_bufmgr_create_buffer(struct pb_manager *mgr,
151                        size_t size,
152                        const struct pb_desc *desc)
153{
154   struct mm_pb_manager *mm = mm_pb_manager(mgr);
155   struct mm_buffer *mm_buf;
156
157   /* We don't handle alignments larger then the one initially setup */
158   assert(desc->alignment % (1 << mm->align2) == 0);
159   if(desc->alignment % (1 << mm->align2))
160      return NULL;
161
162   _glthread_LOCK_MUTEX(mm->mutex);
163
164   mm_buf = CALLOC_STRUCT(mm_buffer);
165   if (!mm_buf) {
166      _glthread_UNLOCK_MUTEX(mm->mutex);
167      return NULL;
168   }
169
170   mm_buf->base.base.refcount = 1;
171   mm_buf->base.base.alignment = desc->alignment;
172   mm_buf->base.base.usage = desc->usage;
173   mm_buf->base.base.size = size;
174
175   mm_buf->base.vtbl = &mm_buffer_vtbl;
176
177   mm_buf->mgr = mm;
178
179   mm_buf->block = mmAllocMem(mm->heap, size, mm->align2, 0);
180   if(!mm_buf->block) {
181      debug_printf("warning: heap full\n");
182#if 0
183      mmDumpMemInfo(mm->heap);
184#endif
185
186      mm_buf->block = mmAllocMem(mm->heap, size, mm->align2, 0);
187      if(!mm_buf->block) {
188	 assert(0);
189         FREE(mm_buf);
190         _glthread_UNLOCK_MUTEX(mm->mutex);
191         return NULL;
192      }
193   }
194
195   /* Some sanity checks */
196   assert(0 <= mm_buf->block->ofs && mm_buf->block->ofs < mm->size);
197   assert(size <= mm_buf->block->size && mm_buf->block->ofs + mm_buf->block->size <= mm->size);
198
199   _glthread_UNLOCK_MUTEX(mm->mutex);
200   return SUPER(mm_buf);
201}
202
203
204static void
205mm_bufmgr_destroy(struct pb_manager *mgr)
206{
207   struct mm_pb_manager *mm = mm_pb_manager(mgr);
208
209   _glthread_LOCK_MUTEX(mm->mutex);
210
211   mmDestroy(mm->heap);
212
213   pb_unmap(mm->buffer);
214   pb_reference(&mm->buffer, NULL);
215
216   _glthread_UNLOCK_MUTEX(mm->mutex);
217
218   FREE(mgr);
219}
220
221
222struct pb_manager *
223mm_bufmgr_create_from_buffer(struct pb_buffer *buffer,
224                             size_t size, size_t align2)
225{
226   struct mm_pb_manager *mm;
227
228   if(!buffer)
229      return NULL;
230
231   mm = CALLOC_STRUCT(mm_pb_manager);
232   if (!mm)
233      return NULL;
234
235   mm->base.create_buffer = mm_bufmgr_create_buffer;
236   mm->base.destroy = mm_bufmgr_destroy;
237
238   mm->size = size;
239   mm->align2 = align2; /* 64-byte alignment */
240
241   _glthread_INIT_MUTEX(mm->mutex);
242
243   mm->buffer = buffer;
244
245   mm->map = pb_map(mm->buffer,
246		    PIPE_BUFFER_USAGE_CPU_READ |
247		    PIPE_BUFFER_USAGE_CPU_WRITE);
248   if(!mm->map)
249      goto failure;
250
251   mm->heap = mmInit(0, size);
252   if (!mm->heap)
253      goto failure;
254
255   return SUPER(mm);
256
257failure:
258if(mm->heap)
259   mmDestroy(mm->heap);
260   if(mm->map)
261      pb_unmap(mm->buffer);
262   if(mm)
263      FREE(mm);
264   return NULL;
265}
266
267
268struct pb_manager *
269mm_bufmgr_create(struct pb_manager *provider,
270                 size_t size, size_t align2)
271{
272   struct pb_buffer *buffer;
273   struct pb_manager *mgr;
274   struct pb_desc desc;
275
276   assert(provider);
277   assert(provider->create_buffer);
278
279   memset(&desc, 0, sizeof(desc));
280   desc.alignment = 1 << align2;
281
282   buffer = provider->create_buffer(provider, size, &desc);
283   if (!buffer)
284      return NULL;
285
286   mgr = mm_bufmgr_create_from_buffer(buffer, size, align2);
287   if (!mgr) {
288      pb_reference(&buffer, NULL);
289      return NULL;
290   }
291
292  return mgr;
293}
294