Re: [PATCH i-g-t v5 02/13] tests/sw_sync: Add sw_sync test

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On 2016-09-15 04:22 PM, Chris Wilson wrote:
On Thu, Sep 15, 2016 at 02:40:07PM -0400, robert.foss@xxxxxxxxxxxxx wrote:
From: Robert Foss <robert.foss@xxxxxxxxxxxxx>

Add initial tests for sw_sync.

Signed-off-by: Robert Foss <robert.foss@xxxxxxxxxxxxx>
Signed-off-by: Gustavo Padovan <gustavo.padovan@xxxxxxxxxxxxxxx>
Reviewed-by: Eric Engestrom <eric@xxxxxxxxxxxx>
---
 tests/Makefile.sources |  1 +
 tests/sw_sync.c        | 52 ++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 53 insertions(+)
 create mode 100644 tests/sw_sync.c

diff --git a/tests/Makefile.sources b/tests/Makefile.sources
index 72a58ad..0ba769f 100644
--- a/tests/Makefile.sources
+++ b/tests/Makefile.sources
@@ -125,6 +125,7 @@ TESTS_progs_M = \
 	prime_mmap_kms \
 	prime_self_import \
 	prime_vgem \
+	sw_sync \
 	template \
 	vgem_basic \
 	vgem_slow \
diff --git a/tests/sw_sync.c b/tests/sw_sync.c
new file mode 100644
index 0000000..47e2dfa
--- /dev/null
+++ b/tests/sw_sync.c
@@ -0,0 +1,52 @@
+/*
+ * Copyright 2012 Google, Inc
+ * Copyright © 2016 Collabora, Ltd.
+ *
+ * Based on the implementation from the Android Open Source Project
+ *
+ * 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 (including the next
+ * paragraph) 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.
+ *
+ * Authors:
+ *    Robert Foss <robert.foss@xxxxxxxxxxxxx>
+ */
+
+#include <stdint.h>
+#include <unistd.h>
+
+#include "sw_sync.h"
+#include "igt.h"
+#include "igt_aux.h"
+
+IGT_TEST_DESCRIPTION("Test SW Sync Framework");
+
+static void test_alloc_timeline(void)
+{
+	int timeline;
+
+	timeline = sw_sync_timeline_create();
+	close(timeline);
+}
+
+igt_main
+{

If I were to run this on a kernel without sw_sync support, it would
fail. We want it to skip instead!

in lib/sw_sync.c:

static bool kernel_has_sw_sync(void)
{
	bool err;

 	igt_ignore_warn(system("/sbin/modprobe -s r sw_sync"));

	err = false;
	if (access("/dev/sw_sync", R_OK | W_OK) < 0) {
		char buf[128];

		snprintf(buf, sizeof(buf), "%s/sw_sync", igt_debugfs_mount());
		err = access("/sys/kernel//sw_sync", R_OK | W_OK) < 0;
	}

	return !err;
}

void igt_require_sw_sync(void)
{
	igt_require(kernel_has_sw_sync());
	
}

then here:

igt_main
{

	igt_fixture {
		igt_require_sw_sync();
	}

+	igt_subtest("alloc_timeline")
+		test_alloc_timeline();
+}

}


This is a solid improvement, igt_debugfs_mount() does not however seem to be available on upstream/master. I've found your patch that includes it amongst other things, would you like me to extract it and include it into this series?

Rob.
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