intel_batchbuffer.c revision 03b705cf 
1/**************************************************************************
2 *
3 * Copyright 2003 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#include <stdio.h>
29#include <stdlib.h>
30#include <unistd.h>
31#include <errno.h>
32#include <signal.h>
33#include <fcntl.h>
34#include <dirent.h>
35#include <string.h>
36#include <assert.h>
37
38#include <sys/ioctl.h>
39#include <X11/Xlibint.h>
40#include <fourcc.h>
41#include <X11/extensions/Xv.h>
42#include <X11/extensions/Xvlib.h>
43#include <X11/extensions/XvMC.h>
44#include <X11/extensions/XvMClib.h>
45
46#include "intel_xvmc_private.h"
47#include "intel_batchbuffer.h"
48#include "brw_defines.h"
49#include "brw_structs.h"
50#define MI_BATCH_BUFFER_END     (0xA << 23)
51#define BATCH_SIZE 8*1024	/* one bo is allocated each time, so the size can be small */
52
53static void i965_end_batch(void)
54{
55	unsigned int size = xvmc_driver->batch.ptr -
56	    xvmc_driver->batch.init_ptr;
57	if ((size & 4) == 0) {
58		*(unsigned int *)xvmc_driver->batch.ptr = 0;
59		xvmc_driver->batch.ptr += 4;
60	}
61	*(unsigned int *)xvmc_driver->batch.ptr = MI_BATCH_BUFFER_END;
62	xvmc_driver->batch.ptr += 4;
63}
64
65Bool intelInitBatchBuffer(void)
66{
67	if ((xvmc_driver->batch.buf =
68	     drm_intel_bo_alloc(xvmc_driver->bufmgr,
69				"batch buffer", BATCH_SIZE, 0x1000)) == NULL) {
70		fprintf(stderr, "unable to alloc batch buffer\n");
71		return False;
72	}
73
74	drm_intel_gem_bo_map_gtt(xvmc_driver->batch.buf);
75
76	xvmc_driver->batch.init_ptr = xvmc_driver->batch.buf->virtual;
77	xvmc_driver->batch.size = BATCH_SIZE;
78	xvmc_driver->batch.space = BATCH_SIZE;
79	xvmc_driver->batch.ptr = xvmc_driver->batch.init_ptr;
80	return True;
81}
82
83void intelFiniBatchBuffer(void)
84{
85	drm_intel_gem_bo_unmap_gtt(xvmc_driver->batch.buf);
86
87	drm_intel_bo_unreference(xvmc_driver->batch.buf);
88}
89
90void intelFlushBatch(Bool refill)
91{
92	i965_end_batch();
93
94	drm_intel_gem_bo_unmap_gtt(xvmc_driver->batch.buf);
95
96	drm_intel_bo_exec(xvmc_driver->batch.buf,
97			  xvmc_driver->batch.ptr - xvmc_driver->batch.init_ptr,
98			  0, 0, 0);
99
100	drm_intel_bo_unreference(xvmc_driver->batch.buf);
101	if ((xvmc_driver->batch.buf =
102	     drm_intel_bo_alloc(xvmc_driver->bufmgr,
103				"batch buffer", BATCH_SIZE, 0x1000)) == NULL) {
104		fprintf(stderr, "unable to alloc batch buffer\n");
105	}
106
107	drm_intel_gem_bo_map_gtt(xvmc_driver->batch.buf);
108
109	xvmc_driver->batch.init_ptr = xvmc_driver->batch.buf->virtual;
110	xvmc_driver->batch.size = BATCH_SIZE;
111	xvmc_driver->batch.space = BATCH_SIZE;
112	xvmc_driver->batch.ptr = xvmc_driver->batch.init_ptr;
113}
114
115void intelBatchbufferRequireSpace(int size)
116{
117	assert(xvmc_driver->batch.ptr - xvmc_driver->batch.init_ptr + size <
118	       xvmc_driver->batch.size - 8);
119	if (xvmc_driver->batch.ptr - xvmc_driver->batch.init_ptr + size
120	    >= xvmc_driver->batch.size - 8)
121		intelFlushBatch(1);
122}
123
124void intelBatchbufferData(const void *data, unsigned bytes, unsigned flags)
125{
126	intelBatchbufferRequireSpace(bytes);
127	memcpy(xvmc_driver->batch.ptr, data, bytes);
128	xvmc_driver->batch.ptr += bytes;
129	xvmc_driver->batch.space -= bytes;
130}
131
132void intel_batch_emit_reloc(dri_bo * bo, uint32_t read_domain,
133			    uint32_t write_domain, uint32_t delta,
134			    unsigned char *ptr)
135{
136	drm_intel_bo_emit_reloc(xvmc_driver->batch.buf,
137				ptr - xvmc_driver->batch.init_ptr, bo, delta,
138				read_domain, write_domain);
139}
140