igt/vc4_dmabuf_poll: Add a test for polling to wait for dmabuf fences.

This successfully catches vc4's lack of dmabuf fencing.

Signed-off-by: Eric Anholt <eric@anholt.net>

1 files changed, 85 insertions, 0 deletions

diff --git a/tests/vc4_dmabuf_poll.c b/tests/vc4_dmabuf_poll.c
new file mode 100644
index 00000000..ac44d4cf
--- /dev/null
+++ b/tests/vc4_dmabuf_poll.c
@@ -0,0 +1,85 @@
+/*
+ * Copyright © 2017 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 "igt_vc4.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 <poll.h>
+#include "vc4_drm.h"
+
+static void
+poll_write_bo_test(int fd, int poll_flag)
+{
+	size_t size = 1024 * 1024 * 4;
+	uint32_t clearval = 0xaabbccdd;
+	/* Get a BO that's being rendered to. */
+	int handle = igt_vc4_get_cleared_bo(fd, size, clearval);
+	int dmabuf_fd = prime_handle_to_fd(fd, handle);
+	struct pollfd p = {
+		.fd = dmabuf_fd,
+		.events = POLLIN,
+	};
+	struct drm_vc4_wait_bo wait = {
+		.handle = handle,
+		.timeout_ns = 0,
+	};
+
+	/* Block for a couple of minutes waiting for rendering to complete. */
+	int poll_ret = poll(&p, 1, 120 * 1000);
+	igt_assert(poll_ret == 1);
+
+	/* Now that we've waited for idle, a nonblocking wait for the
+	 * BO should pass.
+	 */
+	do_ioctl(fd, DRM_IOCTL_VC4_WAIT_BO, &wait);
+
+	close(dmabuf_fd);
+	gem_close(fd, handle);
+}
+
+igt_main
+{
+	int fd;
+
+	igt_fixture
+		fd = drm_open_driver(DRIVER_VC4);
+
+	igt_subtest("poll-write-waits-until-write-done") {
+		poll_write_bo_test(fd, POLLOUT);
+	}
+
+	igt_subtest("poll-read-waits-until-write-done") {
+		poll_write_bo_test(fd, POLLIN);
+	}
+
+	igt_fixture
+		close(fd);
+}