1 /**************************************************************************
5 Copyright 2012 - 2016 Samsung Electronics co., Ltd. All Rights Reserved.
7 Contact: SooChan Lim <sc1.lim@samsung.com>,
8 Changyeon Lee <cyeon.lee@samsung.com>,
9 Boram Park <boram1288.park@samsung.com>,
10 Sangjin Lee <lsj119@samsung.com>
12 Permission is hereby granted, free of charge, to any person obtaining a
13 copy of this software and associated documentation files (the
14 "Software"), to deal in the Software without restriction, including
15 without limitation the rights to use, copy, modify, merge, publish,
16 distribute, sub license, and/or sell copies of the Software, and to
17 permit persons to whom the Software is furnished to do so, subject to
18 the following conditions:
20 The above copyright notice and this permission notice (including the
21 next paragraph) shall be included in all copies or substantial portions
24 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
25 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
27 IN NO EVENT SHALL PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR
28 ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
29 TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
30 SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
32 **************************************************************************/
36 #include "tbm_bufmgr_int.h"
41 #include <sys/ioctl.h>
42 #include <linux/types.h>
45 /* IOCTLs for timeline file object. */
46 #define TIMELINE_IOC_MAGIC 'W'
47 #define TIMELINE_IOC_CREATE_FENCE _IOWR(TIMELINE_IOC_MAGIC, 0, struct create_fence_data)
48 #define TIMELINE_IOC_INC _IOW(TIMELINE_IOC_MAGIC, 1, __u32)
50 /* IOCTLs for fence file object. */
51 #define FENCE_IOC_MAGIC '>'
52 #define FENCE_IOC_MERGE _IOWR(FENCE_IOC_MAGIC, 3, struct sync_merge_data)
54 #define FENCE_IOC_LEGACY_WAIT _IOW(FENCE_IOC_MAGIC, 0, __s32)
55 #define FENCE_IOC_LEGACY_MERGE _IOWR(FENCE_IOC_MAGIC, 1, struct sync_legacy_merge_data)
57 /* Path to the sync device legacy file. */
58 #define SYNC_DEVICE_PATH_LEGACY "/dev/sw_sync"
60 /* Path to the sync device file. */
61 #define SYNC_DEVICE_PATH "/sys/kernel/debug/sync/sw_sync"
63 /* Argument data structure for the timeline.create_fence ioctl. */
64 struct create_fence_data {
65 __u32 value; /* Pt value on the timeline for the fence (IN) */
66 char name[32]; /* Name of the fence object (IN) */
67 __s32 fence; /* File descriptor for the created fence (OUT) */
70 /* Argument data structure for the fence.merge ioctl. */
71 struct sync_merge_data {
72 char name[32]; /* Name of the new fence object (IN) */
73 __s32 fd2; /* fence to merged with the fence (IN) */
74 __s32 fence; /* File descriptor for the new fence (OUT) */
75 __u32 flags; /* merge_data flags (IN) */
76 __u32 pad; /* padding for 64-bit alignment, should always be zero */
79 /* Argument data structure for the legacy fence.merge ioctl. */
80 struct sync_legacy_merge_data {
81 __s32 fd2; /* fence to merged with the fence (IN) */
82 char name[32]; /* Name of the new fence object (IN) */
83 __s32 fence; /* File descriptor for the new fence (OUT) */
86 #define ERRNO_BUF_SIZE 256
92 /* calling strerror_r() might overwrite errno, so save it. */
94 char buf[ERRNO_BUF_SIZE];
96 if (strerror_r(errnum, buf, ERRNO_BUF_SIZE) == 0) {
97 TBM_ERR("errno : %d(%s)\n", errnum, buf);
100 TBM_ERR("errno : %d()\n", errnum);
106 _copy_string(char *dst, const char *src, size_t size)
111 if (src == NULL || size == 1) {
116 while (size-- != 1) {
117 if ((*dst++ = *src++) == '\0')
125 tbm_sync_timeline_create(void)
127 tbm_fd timeline = open(SYNC_DEVICE_PATH, O_RDWR | O_CLOEXEC);
130 timeline = open(SYNC_DEVICE_PATH_LEGACY, O_RDWR | O_CLOEXEC);
139 tbm_sync_timeline_inc(tbm_fd timeline, unsigned int count)
143 if (ioctl(timeline, TIMELINE_IOC_INC, &arg) == -1) {
152 tbm_sync_fence_create(tbm_fd timeline, const char *name, unsigned int value)
154 struct create_fence_data data = { .value = value };
156 _copy_string(data.name, name, 32);
158 if (ioctl(timeline, TIMELINE_IOC_CREATE_FENCE, &data) == -1) {
167 tbm_sync_fence_wait(tbm_fd fence, int timeout)
176 ret = poll(&fds, 1, timeout);
178 if (fds.revents & (POLLERR | POLLNVAL)) {
185 } else if (ret == 0) {
190 } while (ret == -1 && (errno == EINTR || errno == EAGAIN));
197 tbm_sync_fence_merge(const char *name, tbm_fd fence1, tbm_fd fence2)
199 struct sync_merge_data data = { .fd2 = fence2 };
202 _copy_string(data.name, name, 32);
204 ret = ioctl(fence1, FENCE_IOC_MERGE, &data);
205 if (ret < 0 && errno == ENOTTY) {
206 struct sync_legacy_merge_data legacy_data = {. fd2 = fence2 };
208 _copy_string(legacy_data.name, name, 32);
210 ret = ioctl(fence1, FENCE_IOC_LEGACY_MERGE, &legacy_data);
215 } else if (ret < 0) {