1/*
2 * Copyright �� 2008 Intel Corporation
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21 * IN THE SOFTWARE.
22 *
23 * Authors:
24 *    Eric Anholt <eric@anholt.net>
25 *
26 */
27
28#include <stdlib.h>
29#include <stdio.h>
30#include <string.h>
31#include <assert.h>
32#include <fcntl.h>
33#include <inttypes.h>
34#include <errno.h>
35#include <sys/stat.h>
36#include "drm.h"
37#include "i915_drm.h"
38
39#define OBJECT_SIZE 16384
40
41int do_read(int fd, int handle, void *buf, int offset, int size)
42{
43	struct drm_i915_gem_pread read;
44
45	/* Ensure that we don't have any convenient data in buf in case
46	 * we fail.
47	 */
48	memset(buf, 0xd0, size);
49
50	memset(&read, 0, sizeof(read));
51	read.handle = handle;
52	read.data_ptr = (uintptr_t)buf;
53	read.size = size;
54	read.offset = offset;
55
56	return ioctl(fd, DRM_IOCTL_I915_GEM_PREAD, &read);
57}
58
59int do_write(int fd, int handle, void *buf, int offset, int size)
60{
61	struct drm_i915_gem_pwrite write;
62
63	memset(&write, 0, sizeof(write));
64	write.handle = handle;
65	write.data_ptr = (uintptr_t)buf;
66	write.size = size;
67	write.offset = offset;
68
69	return ioctl(fd, DRM_IOCTL_I915_GEM_PWRITE, &write);
70}
71
72int main(int argc, char **argv)
73{
74	int fd;
75	struct drm_i915_gem_create create;
76	uint8_t expected[OBJECT_SIZE];
77	uint8_t buf[OBJECT_SIZE];
78	int ret;
79	int handle;
80
81	fd = drm_open_matching("8086:*", 0);
82	if (fd < 0) {
83		fprintf(stderr, "failed to open intel drm device, skipping\n");
84		return 0;
85	}
86
87	memset(&create, 0, sizeof(create));
88	create.size = OBJECT_SIZE;
89	ret = ioctl(fd, DRM_IOCTL_I915_GEM_CREATE, &create);
90	assert(ret == 0);
91	handle = create.handle;
92
93	printf("Testing contents of newly created object.\n");
94	ret = do_read(fd, handle, buf, 0, OBJECT_SIZE);
95	assert(ret == 0);
96	memset(&expected, 0, sizeof(expected));
97	assert(memcmp(expected, buf, sizeof(expected)) == 0);
98
99	printf("Testing read beyond end of buffer.\n");
100	ret = do_read(fd, handle, buf, OBJECT_SIZE / 2, OBJECT_SIZE);
101	printf("%d %d\n", ret, errno);
102	assert(ret == -1 && errno == EINVAL);
103
104	printf("Testing full write of buffer\n");
105	memset(buf, 0, sizeof(buf));
106	memset(buf + 1024, 0x01, 1024);
107	memset(expected + 1024, 0x01, 1024);
108	ret = do_write(fd, handle, buf, 0, OBJECT_SIZE);
109	assert(ret == 0);
110	ret = do_read(fd, handle, buf, 0, OBJECT_SIZE);
111	assert(ret == 0);
112	assert(memcmp(buf, expected, sizeof(buf)) == 0);
113
114	printf("Testing partial write of buffer\n");
115	memset(buf + 4096, 0x02, 1024);
116	memset(expected + 4096, 0x02, 1024);
117	ret = do_write(fd, handle, buf + 4096, 4096, 1024);
118	assert(ret == 0);
119	ret = do_read(fd, handle, buf, 0, OBJECT_SIZE);
120	assert(ret == 0);
121	assert(memcmp(buf, expected, sizeof(buf)) == 0);
122
123	printf("Testing partial read of buffer\n");
124	ret = do_read(fd, handle, buf, 512, 1024);
125	assert(ret == 0);
126	assert(memcmp(buf, expected + 512, 1024) == 0);
127
128	printf("Testing read of bad buffer handle\n");
129	ret = do_read(fd, 1234, buf, 0, 1024);
130	assert(ret == -1 && errno == EBADF);
131
132	printf("Testing write of bad buffer handle\n");
133	ret = do_write(fd, 1234, buf, 0, 1024);
134	assert(ret == -1 && errno == EBADF);
135
136	close(fd);
137
138	return 0;
139}
140