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 Jose Fonseca <jrfonseca@tungstengraphics.com>
33 */
34
35
36#include "pipe/p_defines.h"
37#include "util/u_debug.h"
38#include "os/os_thread.h"
39#include "util/u_memory.h"
40#include "util/u_double_list.h"
41#include "util/u_mm.h"
42#include "pb_buffer.h"
43#include "pb_bufmgr.h"
44
45
46/**
47 * Convenience macro (type safe).
48 */
49#define SUPER(__derived) (&(__derived)->base)
50
51
52struct mm_pb_manager
53{
54   struct pb_manager base;
55
56   pipe_mutex mutex;
57
58   pb_size size;
59   struct mem_block *heap;
60
61   pb_size align2;
62
63   struct pb_buffer *buffer;
64   void *map;
65};
66
67
68static INLINE struct mm_pb_manager *
69mm_pb_manager(struct pb_manager *mgr)
70{
71   assert(mgr);
72   return (struct mm_pb_manager *)mgr;
73}
74
75
76struct mm_buffer
77{
78   struct pb_buffer base;
79
80   struct mm_pb_manager *mgr;
81
82   struct mem_block *block;
83};
84
85
86static INLINE struct mm_buffer *
87mm_buffer(struct pb_buffer *buf)
88{
89   assert(buf);
90   return (struct mm_buffer *)buf;
91}
92
93
94static void
95mm_buffer_destroy(struct pb_buffer *buf)
96{
97   struct mm_buffer *mm_buf = mm_buffer(buf);
98   struct mm_pb_manager *mm = mm_buf->mgr;
99
100   assert(!pipe_is_referenced(&mm_buf->base.reference));
101
102   pipe_mutex_lock(mm->mutex);
103   u_mmFreeMem(mm_buf->block);
104   FREE(mm_buf);
105   pipe_mutex_unlock(mm->mutex);
106}
107
108
109static void *
110mm_buffer_map(struct pb_buffer *buf,
111              unsigned flags,
112              void *flush_ctx)
113{
114   struct mm_buffer *mm_buf = mm_buffer(buf);
115   struct mm_pb_manager *mm = mm_buf->mgr;
116
117   /* XXX: it will be necessary to remap here to propagate flush_ctx */
118
119   return (unsigned char *) mm->map + mm_buf->block->ofs;
120}
121
122
123static void
124mm_buffer_unmap(struct pb_buffer *buf)
125{
126   /* No-op */
127}
128
129
130static enum pipe_error
131mm_buffer_validate(struct pb_buffer *buf,
132                   struct pb_validate *vl,
133                   unsigned flags)
134{
135   struct mm_buffer *mm_buf = mm_buffer(buf);
136   struct mm_pb_manager *mm = mm_buf->mgr;
137   return pb_validate(mm->buffer, vl, flags);
138}
139
140
141static void
142mm_buffer_fence(struct pb_buffer *buf,
143                struct pipe_fence_handle *fence)
144{
145   struct mm_buffer *mm_buf = mm_buffer(buf);
146   struct mm_pb_manager *mm = mm_buf->mgr;
147   pb_fence(mm->buffer, fence);
148}
149
150
151static void
152mm_buffer_get_base_buffer(struct pb_buffer *buf,
153                          struct pb_buffer **base_buf,
154                          pb_size *offset)
155{
156   struct mm_buffer *mm_buf = mm_buffer(buf);
157   struct mm_pb_manager *mm = mm_buf->mgr;
158   pb_get_base_buffer(mm->buffer, base_buf, offset);
159   *offset += mm_buf->block->ofs;
160}
161
162
163static const struct pb_vtbl
164mm_buffer_vtbl = {
165      mm_buffer_destroy,
166      mm_buffer_map,
167      mm_buffer_unmap,
168      mm_buffer_validate,
169      mm_buffer_fence,
170      mm_buffer_get_base_buffer
171};
172
173
174static struct pb_buffer *
175mm_bufmgr_create_buffer(struct pb_manager *mgr,
176                        pb_size size,
177                        const struct pb_desc *desc)
178{
179   struct mm_pb_manager *mm = mm_pb_manager(mgr);
180   struct mm_buffer *mm_buf;
181
182   /* We don't handle alignments larger then the one initially setup */
183   assert(pb_check_alignment(desc->alignment, (pb_size)1 << mm->align2));
184   if(!pb_check_alignment(desc->alignment, (pb_size)1 << mm->align2))
185      return NULL;
186
187   pipe_mutex_lock(mm->mutex);
188
189   mm_buf = CALLOC_STRUCT(mm_buffer);
190   if (!mm_buf) {
191      pipe_mutex_unlock(mm->mutex);
192      return NULL;
193   }
194
195   pipe_reference_init(&mm_buf->base.reference, 1);
196   mm_buf->base.alignment = desc->alignment;
197   mm_buf->base.usage = desc->usage;
198   mm_buf->base.size = size;
199
200   mm_buf->base.vtbl = &mm_buffer_vtbl;
201
202   mm_buf->mgr = mm;
203
204   mm_buf->block = u_mmAllocMem(mm->heap, (int)size, (int)mm->align2, 0);
205   if(!mm_buf->block) {
206#if 0
207      debug_printf("warning: heap full\n");
208      mmDumpMemInfo(mm->heap);
209#endif
210      FREE(mm_buf);
211      pipe_mutex_unlock(mm->mutex);
212      return NULL;
213   }
214
215   /* Some sanity checks */
216   assert(0 <= (pb_size)mm_buf->block->ofs && (pb_size)mm_buf->block->ofs < mm->size);
217   assert(size <= (pb_size)mm_buf->block->size && (pb_size)mm_buf->block->ofs + (pb_size)mm_buf->block->size <= mm->size);
218
219   pipe_mutex_unlock(mm->mutex);
220   return SUPER(mm_buf);
221}
222
223
224static void
225mm_bufmgr_flush(struct pb_manager *mgr)
226{
227   /* No-op */
228}
229
230
231static void
232mm_bufmgr_destroy(struct pb_manager *mgr)
233{
234   struct mm_pb_manager *mm = mm_pb_manager(mgr);
235
236   pipe_mutex_lock(mm->mutex);
237
238   u_mmDestroy(mm->heap);
239
240   pb_unmap(mm->buffer);
241   pb_reference(&mm->buffer, NULL);
242
243   pipe_mutex_unlock(mm->mutex);
244
245   FREE(mgr);
246}
247
248
249struct pb_manager *
250mm_bufmgr_create_from_buffer(struct pb_buffer *buffer,
251                             pb_size size, pb_size align2)
252{
253   struct mm_pb_manager *mm;
254
255   if(!buffer)
256      return NULL;
257
258   mm = CALLOC_STRUCT(mm_pb_manager);
259   if (!mm)
260      return NULL;
261
262   mm->base.destroy = mm_bufmgr_destroy;
263   mm->base.create_buffer = mm_bufmgr_create_buffer;
264   mm->base.flush = mm_bufmgr_flush;
265
266   mm->size = size;
267   mm->align2 = align2; /* 64-byte alignment */
268
269   pipe_mutex_init(mm->mutex);
270
271   mm->buffer = buffer;
272
273   mm->map = pb_map(mm->buffer,
274		    PB_USAGE_CPU_READ |
275		    PB_USAGE_CPU_WRITE, NULL);
276   if(!mm->map)
277      goto failure;
278
279   mm->heap = u_mmInit(0, (int)size);
280   if (!mm->heap)
281      goto failure;
282
283   return SUPER(mm);
284
285failure:
286if(mm->heap)
287   u_mmDestroy(mm->heap);
288   if(mm->map)
289      pb_unmap(mm->buffer);
290   if(mm)
291      FREE(mm);
292   return NULL;
293}
294
295
296struct pb_manager *
297mm_bufmgr_create(struct pb_manager *provider,
298                 pb_size size, pb_size align2)
299{
300   struct pb_buffer *buffer;
301   struct pb_manager *mgr;
302   struct pb_desc desc;
303
304   if(!provider)
305      return NULL;
306
307   memset(&desc, 0, sizeof(desc));
308   desc.alignment = 1 << align2;
309
310   buffer = provider->create_buffer(provider, size, &desc);
311   if (!buffer)
312      return NULL;
313
314   mgr = mm_bufmgr_create_from_buffer(buffer, size, align2);
315   if (!mgr) {
316      pb_reference(&buffer, NULL);
317      return NULL;
318   }
319
320  return mgr;
321}
322