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	struct drm_i915_gem_mmap mmap;
77	struct drm_gem_close unref;
78	uint8_t expected[OBJECT_SIZE];
79	uint8_t buf[OBJECT_SIZE];
80	uint8_t *addr;
81	int ret;
82	int handle;
83
84	fd = drm_open_matching("8086:*", 0);
85	if (fd < 0) {
86		fprintf(stderr, "failed to open intel drm device, skipping\n");
87		return 0;
88	}
89
90	memset(&mmap, 0, sizeof(mmap));
91	mmap.handle = 0x10101010;
92	mmap.offset = 0;
93	mmap.size = 4096;
94	printf("Testing mmaping of bad object.\n");
95	ret = ioctl(fd, DRM_IOCTL_I915_GEM_MMAP, &mmap);
96	assert(ret == -1 && errno == ENOENT);
97
98	memset(&create, 0, sizeof(create));
99	create.size = OBJECT_SIZE;
100	ret = ioctl(fd, DRM_IOCTL_I915_GEM_CREATE, &create);
101	assert(ret == 0);
102	handle = create.handle;
103
104	printf("Testing mmaping of newly created object.\n");
105	mmap.handle = handle;
106	mmap.offset = 0;
107	mmap.size = OBJECT_SIZE;
108	ret = ioctl(fd, DRM_IOCTL_I915_GEM_MMAP, &mmap);
109	assert(ret == 0);
110	addr = (uint8_t *)(uintptr_t)mmap.addr_ptr;
111
112	printf("Testing contents of newly created object.\n");
113	memset(expected, 0, sizeof(expected));
114	assert(memcmp(addr, expected, sizeof(expected)) == 0);
115
116	printf("Testing coherency of writes and mmap reads.\n");
117	memset(buf, 0, sizeof(buf));
118	memset(buf + 1024, 0x01, 1024);
119	memset(expected + 1024, 0x01, 1024);
120	ret = do_write(fd, handle, buf, 0, OBJECT_SIZE);
121	assert(ret == 0);
122	assert(memcmp(buf, addr, sizeof(buf)) == 0);
123
124	printf("Testing that mapping stays after close\n");
125	unref.handle = handle;
126	ret = ioctl(fd, DRM_IOCTL_GEM_CLOSE, &unref);
127	assert(ret == 0);
128	assert(memcmp(buf, addr, sizeof(buf)) == 0);
129
130	printf("Testing unmapping\n");
131	munmap(addr, OBJECT_SIZE);
132
133	close(fd);
134
135	return 0;
136}
137