[PATCH i-g-t v10 17/21] lib/sw_sync: Add igt_require_sw_sync to enable skipping on no sw_sync support

Robert Foss
2016-12-07T02:53:06Z

Add igt_require_sw_sync to provide tests to skip if sw_sync support isn't
available on the host machine.

Signed-off-by: Robert Foss <robert.foss@collabora.com>
Reviewed-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
---
lib/sw_sync.c | 22 ++++++++++++++++++++++
lib/sw_sync.h | 1 +
2 files changed, 23 insertions(+)

diff --git a/lib/sw_sync.c b/lib/sw_sync.c
index a2168f78..d4ecc898 100644
--- a/lib/sw_sync.c
+++ b/lib/sw_sync.c
@@ -194,3 +194,25 @@ int sync_fence_count_status(int fd, int status)
igt_assert_f(count >= 0, "No fences with supplied status found");
return count;
}
+
+static bool kernel_has_sw_sync(void)
+{
+ bool err;
+
+ igt_ignore_warn(system("/sbin/modprobe -s r sw_sync"));
+
+ err = false;
+ if (access(DEVFS_SW_SYNC, R_OK | W_OK) < 0) {
+ char buf[128];
+
+ snprintf(buf, sizeof(buf), "%s/sw_sync", igt_debugfs_mount());
+ err = access(DEBUGFS_SW_SYNC, R_OK | W_OK) < 0;
+ }
+
+ return !err;
+}
+
+void igt_require_sw_sync(void)
+{
+ igt_require(kernel_has_sw_sync());
+}
diff --git a/lib/sw_sync.h b/lib/sw_sync.h
index cea5a603..82af3378 100644
--- a/lib/sw_sync.h
+++ b/lib/sw_sync.h
@@ -39,6 +39,7 @@ int sync_merge(int fd1, int fd2);
int sync_wait(int fence, int timeout);
int sync_fence_count(int fd);
int sync_fence_count_status(int fd, int status);
+void igt_require_sw_sync(void);

#endif