aboutsummaryrefslogtreecommitdiff
path: root/mesalib/src/gallium/auxiliary/util/u_upload_mgr.c
blob: e50db6d67feb4615feef2f644c82feef6d5860e5 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
/**************************************************************************
 * 
 * Copyright 2009 VMware, Inc.
 * All Rights Reserved.
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sub license, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 * 
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 * 
 **************************************************************************/

/* Helper utility for uploading user buffers & other data, and
 * coalescing small buffers into larger ones.
 */

#include "pipe/p_defines.h"
#include "util/u_inlines.h"
#include "pipe/p_context.h"
#include "util/u_memory.h"
#include "util/u_math.h"

#include "u_upload_mgr.h"


struct u_upload_mgr {
   struct pipe_context *pipe;

   unsigned default_size;  /* Minimum size of the upload buffer, in bytes. */
   unsigned alignment;     /* Alignment of each sub-allocation. */
   unsigned bind;          /* Bitmask of PIPE_BIND_* flags. */

   struct pipe_resource *buffer;   /* Upload buffer. */
   struct pipe_transfer *transfer; /* Transfer object for the upload buffer. */
   uint8_t *map;    /* Pointer to the mapped upload buffer. */
   unsigned size;   /* Actual size of the upload buffer. */
   unsigned offset; /* Aligned offset to the upload buffer, pointing
                     * at the first unused byte. */
};


struct u_upload_mgr *u_upload_create( struct pipe_context *pipe,
                                      unsigned default_size,
                                      unsigned alignment,
                                      unsigned bind )
{
   struct u_upload_mgr *upload = CALLOC_STRUCT( u_upload_mgr );
   if (!upload)
      return NULL;

   upload->pipe = pipe;
   upload->default_size = default_size;
   upload->alignment = alignment;
   upload->bind = bind;
   upload->buffer = NULL;

   return upload;
}

void u_upload_unmap( struct u_upload_mgr *upload )
{
   if (upload->transfer) {
      struct pipe_box *box = &upload->transfer->box;
      if (upload->offset > box->x) {

         pipe_buffer_flush_mapped_range(upload->pipe, upload->transfer,
                                        box->x, upload->offset - box->x);
      }
      pipe_transfer_unmap(upload->pipe, upload->transfer);
      pipe_transfer_destroy(upload->pipe, upload->transfer);
      upload->transfer = NULL;
      upload->map = NULL;
   }
}

/* Release old buffer.
 * 
 * This must usually be called prior to firing the command stream
 * which references the upload buffer, as many memory managers will
 * cause subsequent maps of a fired buffer to wait.
 *
 * Can improve this with a change to pipe_buffer_write to use the
 * DONT_WAIT bit, but for now, it's easiest just to grab a new buffer.
 */
void u_upload_flush( struct u_upload_mgr *upload )
{
   /* Unmap and unreference the upload buffer. */
   u_upload_unmap(upload);
   pipe_resource_reference( &upload->buffer, NULL );
   upload->size = 0;
}


void u_upload_destroy( struct u_upload_mgr *upload )
{
   u_upload_flush( upload );
   FREE( upload );
}


static enum pipe_error 
u_upload_alloc_buffer( struct u_upload_mgr *upload,
                       unsigned min_size )
{
   unsigned size;

   /* Release the old buffer, if present:
    */
   u_upload_flush( upload );

   /* Allocate a new one: 
    */
   size = align(MAX2(upload->default_size, min_size), 4096);

   upload->buffer = pipe_buffer_create( upload->pipe->screen,
                                        upload->bind,
                                        PIPE_USAGE_STREAM,
                                        size );
   if (upload->buffer == NULL) 
      goto fail;

   /* Map the new buffer. */
   upload->map = pipe_buffer_map_range(upload->pipe, upload->buffer,
                                       0, size,
                                       PIPE_TRANSFER_WRITE |
                                       PIPE_TRANSFER_FLUSH_EXPLICIT,
                                       &upload->transfer);
   
   upload->size = size;

   upload->offset = 0;
   return 0;

fail:
   if (upload->buffer)
      pipe_resource_reference( &upload->buffer, NULL );

   return PIPE_ERROR_OUT_OF_MEMORY;
}

enum pipe_error u_upload_alloc( struct u_upload_mgr *upload,
                                unsigned min_out_offset,
                                unsigned size,
                                unsigned *out_offset,
                                struct pipe_resource **outbuf,
                                boolean *flushed,
                                void **ptr )
{
   unsigned alloc_size = align( size, upload->alignment );
   unsigned alloc_offset = align(min_out_offset, upload->alignment);
   unsigned offset;

   /* Make sure we have enough space in the upload buffer
    * for the sub-allocation. */
   if (MAX2(upload->offset, alloc_offset) + alloc_size > upload->size) {
      enum pipe_error ret = u_upload_alloc_buffer(upload,
                                                  alloc_offset + alloc_size);
      if (ret)
         return ret;

      *flushed = TRUE;
   } else {
      *flushed = FALSE;
   }

   offset = MAX2(upload->offset, alloc_offset);

   if (!upload->map) {
      upload->map = pipe_buffer_map_range(upload->pipe, upload->buffer,
					  offset, upload->size - offset,
					  PIPE_TRANSFER_WRITE |
					  PIPE_TRANSFER_FLUSH_EXPLICIT |
					  PIPE_TRANSFER_UNSYNCHRONIZED,
					  &upload->transfer);
   }

   assert(offset < upload->buffer->width0);
   assert(offset + size <= upload->buffer->width0);
   assert(size);

   /* Emit the return values: */
   *ptr = upload->map + offset;
   pipe_resource_reference( outbuf, upload->buffer );
   *out_offset = offset;

   upload->offset = offset + alloc_size;
   return PIPE_OK;
}

enum pipe_error u_upload_data( struct u_upload_mgr *upload,
                               unsigned min_out_offset,
                               unsigned size,
                               const void *data,
                               unsigned *out_offset,
                               struct pipe_resource **outbuf,
                               boolean *flushed )
{
   uint8_t *ptr;
   enum pipe_error ret = u_upload_alloc(upload, min_out_offset, size,
                                        out_offset, outbuf, flushed,
                                        (void**)&ptr);
   if (ret)
      return ret;

   memcpy(ptr, data, size);
   return PIPE_OK;
}


/* As above, but upload the full contents of a buffer.  Useful for
 * uploading user buffers, avoids generating an explosion of GPU
 * buffers if you have an app that does lots of small vertex buffer
 * renders or DrawElements calls.
 */
enum pipe_error u_upload_buffer( struct u_upload_mgr *upload,
                                 unsigned min_out_offset,
                                 unsigned offset,
                                 unsigned size,
                                 struct pipe_resource *inbuf,
                                 unsigned *out_offset,
                                 struct pipe_resource **outbuf,
                                 boolean *flushed )
{
   enum pipe_error ret = PIPE_OK;
   struct pipe_transfer *transfer = NULL;
   const char *map = NULL;

   map = (const char *)pipe_buffer_map_range(upload->pipe,
                                             inbuf,
                                             offset, size,
                                             PIPE_TRANSFER_READ,
                                             &transfer);

   if (map == NULL) {
      ret = PIPE_ERROR_OUT_OF_MEMORY;
      goto done;
   }

   if (0)
      debug_printf("upload ptr %p ofs %d sz %d\n", map, offset, size);

   ret = u_upload_data( upload,
                        min_out_offset,
                        size,
                        map,
                        out_offset,
                        outbuf, flushed );

done:
   if (map)
      pipe_buffer_unmap( upload->pipe, transfer );

   return ret;
}