summaryrefslogtreecommitdiff
path: root/tools/testing/selftests/sync/sync.c
blob: 7741c0518d18104c4f3cbb29d1c2604a014d3508 (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
/*
 *  sync / sw_sync abstraction
 *  Copyright 2015-2016 Collabora Ltd.
 *
 *  Based on the implementation from the Android Open Source Project,
 *
 *  Copyright 2012 Google, Inc
 *
 *  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, sublicense,
 *  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 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 NONINFRINGEMENT. IN NO EVENT SHALL
 *  THE AUTHORS OR COPYRIGHT HOLDERS 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.
 */

#include <fcntl.h>
#include <malloc.h>
#include <poll.h>
#include <stdint.h>
#include <string.h>
#include <unistd.h>

#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/types.h>

#include "sync.h"
#include "sw_sync.h"

#include <linux/sync_file.h>


/* SW_SYNC ioctls */
struct sw_sync_create_fence_data {
	__u32	value;
	char	name[32];
	__s32	fence;
};

#define SW_SYNC_IOC_MAGIC		'W'
#define SW_SYNC_IOC_CREATE_FENCE	_IOWR(SW_SYNC_IOC_MAGIC, 0,\
					      struct sw_sync_create_fence_data)
#define SW_SYNC_IOC_INC			_IOW(SW_SYNC_IOC_MAGIC, 1, __u32)


int sync_wait(int fd, int timeout)
{
	struct pollfd fds;

	fds.fd = fd;
	fds.events = POLLIN | POLLERR;

	return poll(&fds, 1, timeout);
}

int sync_merge(const char *name, int fd1, int fd2)
{
	struct sync_merge_data data = {};
	int err;

	data.fd2 = fd2;
	strncpy(data.name, name, sizeof(data.name) - 1);
	data.name[sizeof(data.name) - 1] = '\0';

	err = ioctl(fd1, SYNC_IOC_MERGE, &data);
	if (err < 0)
		return err;

	return data.fence;
}

static struct sync_file_info *sync_file_info(int fd)
{
	struct sync_file_info *info;
	struct sync_fence_info *fence_info;
	int err, num_fences;

	info = calloc(1, sizeof(*info));
	if (info == NULL)
		return NULL;

	err = ioctl(fd, SYNC_IOC_FILE_INFO, info);
	if (err < 0) {
		free(info);
		return NULL;
	}

	num_fences = info->num_fences;

	if (num_fences) {
		info->flags = 0;
		info->num_fences = num_fences;

		fence_info = calloc(num_fences, sizeof(*fence_info));
		if (!fence_info) {
			free(info);
			return NULL;
		}

		info->sync_fence_info = (uint64_t)(unsigned long)fence_info;

		err = ioctl(fd, SYNC_IOC_FILE_INFO, info);
		if (err < 0) {
			free(fence_info);
			free(info);
			return NULL;
		}
	}

	return info;
}

static void sync_file_info_free(struct sync_file_info *info)
{
	free((void *)(unsigned long)info->sync_fence_info);
	free(info);
}

int sync_fence_size(int fd)
{
	int count;
	struct sync_file_info *info = sync_file_info(fd);

	if (!info)
		return 0;

	count = info->num_fences;

	sync_file_info_free(info);

	return count;
}

int sync_fence_count_with_status(int fd, int status)
{
	unsigned int i, count = 0;
	struct sync_fence_info *fence_info = NULL;
	struct sync_file_info *info = sync_file_info(fd);

	if (!info)
		return -1;

	fence_info = (struct sync_fence_info *)(unsigned long)info->sync_fence_info;
	for (i = 0 ; i < info->num_fences ; i++) {
		if (fence_info[i].status == status)
			count++;
	}

	sync_file_info_free(info);

	return count;
}

int sw_sync_timeline_create(void)
{
	return open("/sys/kernel/debug/sync/sw_sync", O_RDWR);
}

int sw_sync_timeline_inc(int fd, unsigned int count)
{
	__u32 arg = count;

	return ioctl(fd, SW_SYNC_IOC_INC, &arg);
}

int sw_sync_timeline_is_valid(int fd)
{
	int status;

	if (fd == -1)
		return 0;

	status = fcntl(fd, F_GETFD, 0);
	return (status >= 0);
}

void sw_sync_timeline_destroy(int fd)
{
	if (sw_sync_timeline_is_valid(fd))
		close(fd);
}

int sw_sync_fence_create(int fd, const char *name, unsigned int value)
{
	struct sw_sync_create_fence_data data = {};
	int err;

	data.value = value;
	strncpy(data.name, name, sizeof(data.name) - 1);
	data.name[sizeof(data.name) - 1] = '\0';

	err = ioctl(fd, SW_SYNC_IOC_CREATE_FENCE, &data);
	if (err < 0)
		return err;

	return data.fence;
}

int sw_sync_fence_is_valid(int fd)
{
	/* Same code! */
	return sw_sync_timeline_is_valid(fd);
}

void sw_sync_fence_destroy(int fd)
{
	if (sw_sync_fence_is_valid(fd))
		close(fd);
}