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
do_read(int fd,int handle,void * buf,int offset,int size)41 int 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
do_write(int fd,int handle,void * buf,int offset,int size)59 int 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
main(int argc,char ** argv)72 int 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