[PATCH 12/66] tests/xe_eudebug: Exercise read_event ioctl

[Christoph Manszewski <christoph.manszewski@intel.com>]

From: Dominik Grzegorzek <dominik.grzegorzek@intel.com>

Introduce synchronous test, which validates eu debugger read_event
ioctl.

Signed-off-by: Dominik Grzegorzek <dominik.grzegorzek@intel.com>
Cc: Christoph Manszewski <christoph.manszewski@intel.com>
---
 tests/intel/xe_eudebug.c | 107 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 107 insertions(+)

diff --git a/tests/intel/xe_eudebug.c b/tests/intel/xe_eudebug.c
index d0dc38436..6bbad795c 100644
--- a/tests/intel/xe_eudebug.c
+++ b/tests/intel/xe_eudebug.c
@@ -2,6 +2,8 @@
 /*
  * Copyright © 2023 Intel Corporation
  */
+#include <poll.h>
+#include <sys/ioctl.h>
 
 #include "igt.h"
 #include "xe/xe_eudebug.h"
@@ -14,6 +16,45 @@ static void run_basic_client(struct xe_eudebug_client *c)
 	xe_eudebug_client_close_driver(c, fd);
 }
 
+static int read_event(int debugfd, struct drm_xe_eudebug_event *event)
+{
+	int ret;
+
+	ret = igt_ioctl(debugfd, DRM_XE_EUDEBUG_IOCTL_READ_EVENT, event);
+	if (ret < 0)
+		return -errno;
+
+	return ret;
+}
+
+static int __read_event(int debugfd, struct drm_xe_eudebug_event *event)
+{
+	int ret;
+
+	ret = ioctl(debugfd, DRM_XE_EUDEBUG_IOCTL_READ_EVENT, event);
+	if (ret < 0)
+		return -errno;
+
+	return ret;
+}
+
+static int poll_event(int fd, int timeout_ms)
+{
+	int ret;
+
+	struct pollfd p = {
+		.fd = fd,
+		.events = POLLIN,
+		.revents = 0,
+	};
+
+	ret = poll(&p, 1, timeout_ms);
+	if (ret == -1)
+		return -errno;
+
+	return ret == 1 && (p.revents & POLLIN);
+}
+
 static int __debug_connect(int fd, int *debugfd, struct drm_xe_eudebug_connect *param)
 {
 	int ret = 0;
@@ -104,6 +145,69 @@ static void test_close(int fd)
 	close(debug_fd1);
 }
 
+/**
+ * SUBTEST: basic-read-event
+ * Description:
+ *	Synchronously exercise eu debugger event polling and reading.
+ */
+#define MAX_EVENT_SIZE (32 * 1024)
+static void test_read_event(int fd)
+{
+	struct drm_xe_eudebug_event *event;
+	struct xe_eudebug_debugger *d;
+	struct xe_eudebug_client *c;
+
+	event = malloc(MAX_EVENT_SIZE);
+	igt_assert(event);
+	memset(event, 0, sizeof(*event));
+
+	c = xe_eudebug_client_create(fd, run_basic_client, 0, NULL);
+	d = xe_eudebug_debugger_create(fd, 0, NULL);
+
+	igt_assert_eq(xe_eudebug_debugger_attach(d, c), 0);
+	igt_assert_eq(poll_event(d->fd, 500), 0);
+
+	event->len = 1;
+	event->type = DRM_XE_EUDEBUG_EVENT_NONE;
+	igt_assert_eq(read_event(d->fd, event), -EINVAL);
+
+	event->len = MAX_EVENT_SIZE;
+	event->type = DRM_XE_EUDEBUG_EVENT_NONE;
+	igt_assert_eq(read_event(d->fd, event), -EINVAL);
+
+	xe_eudebug_client_start(c);
+
+	igt_assert_eq(poll_event(d->fd, 500), 1);
+	event->type = DRM_XE_EUDEBUG_EVENT_READ;
+	igt_assert_eq(read_event(d->fd, event), 0);
+
+	igt_assert_eq(poll_event(d->fd, 500), 1);
+	event->len = MAX_EVENT_SIZE;
+	event->flags = 0;
+	event->type = DRM_XE_EUDEBUG_EVENT_READ;
+	igt_assert_eq(read_event(d->fd, event), 0);
+
+	fcntl(d->fd, F_SETFL, fcntl(d->fd, F_GETFL) | O_NONBLOCK);
+	igt_assert(fcntl(d->fd, F_GETFL) & O_NONBLOCK);
+
+	igt_assert_eq(poll_event(d->fd, 500), 0);
+	event->len = MAX_EVENT_SIZE;
+	event->flags = 0;
+	event->type = DRM_XE_EUDEBUG_EVENT_READ;
+	igt_assert_eq(__read_event(d->fd, event), -EAGAIN);
+
+	xe_eudebug_client_wait_done(c);
+	xe_eudebug_client_stop(c);
+
+	igt_assert_eq(poll_event(d->fd, 500), 0);
+	igt_assert_eq(__read_event(d->fd, event), -EAGAIN);
+
+	xe_eudebug_debugger_destroy(d);
+	xe_eudebug_client_destroy(c);
+
+	free(event);
+}
+
 static void test_basic_sessions(int fd, unsigned int flags, int count)
 {
 	struct xe_eudebug_session **s;
@@ -140,6 +244,9 @@ igt_main
 	igt_subtest("basic-close")
 		test_close(fd);
 
+	igt_subtest("basic-read-event")
+		test_read_event(fd);
+
 	igt_subtest("basic-client")
 		test_basic_sessions(fd, 0, 1);
 
-- 
2.34.1