igt/vc4_wait_seqno: Add a test for VC4's wait-for-seqno ioctl.

v2: Use do_ioctl_err().

Signed-off-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Daniel Stone <daniels@collabora.com>

tests/vc4_wait_seqno.c

@@ -0,0 +1,66 @@
+/*
+ * Copyright © 2016 Broadcom
+ *
+ * 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.
+ */
+
+#include "igt.h"
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <fcntl.h>
+#include <inttypes.h>
+#include <errno.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include "vc4_drm.h"
+
+igt_main
+{
+	int fd;
+
+	igt_fixture
+		fd = drm_open_driver(DRIVER_VC4);
+
+	/* A 64-bit seqno should never hit the maximum value over the
+	 * lifetime of the system.  (A submit per 1000 cycles at 1Ghz
+	 * would still take 584000 years).  As a result, we can wait
+	 * for it and be sure of a timeout.
+	 */
+	igt_subtest("bad-seqno-0ns") {
+		struct drm_vc4_wait_seqno arg = {
+			.seqno = ~0ull,
+			.timeout_ns = 0,
+		};
+		do_ioctl_err(fd, DRM_IOCTL_VC4_WAIT_SEQNO, &arg, ETIME);
+	}
+
+	igt_subtest("bad-seqno-1ns") {
+		struct drm_vc4_wait_seqno arg = {
+			.seqno = ~0ull,
+			.timeout_ns = 1,
+		};
+		do_ioctl_err(fd, DRM_IOCTL_VC4_WAIT_SEQNO, &arg, ETIME);
+	}
+
+	igt_fixture
+		close(fd);
+}