[igt-dev] [PATCH i-g-t 7/8] tests/sriov_basic: validate driver binding to VFs

[Lukasz Laguna <lukasz.laguna@intel.com>]

From: Katarzyna Dec <katarzyna.dec@intel.com>

Test enables VFs in range <1..totalvfs>, bind driver to all of them and
then unbind driver from all of them.

Signed-off-by: Katarzyna Dec <katarzyna.dec@intel.com>
Reviewed-by: Lukasz Laguna <lukasz.laguna@intel.com>
Signed-off-by: Lukasz Laguna <lukasz.laguna@intel.com>
Reviewed-by: Marcin Bernatowicz <marcin.bernatowicz@linux.intel.com>
---
 tests/sriov_basic.c | 51 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 51 insertions(+)

diff --git a/tests/sriov_basic.c b/tests/sriov_basic.c
index fc0914962..179731daf 100644
--- a/tests/sriov_basic.c
+++ b/tests/sriov_basic.c
@@ -61,6 +61,38 @@ static void probe_disable_vfs(int pf_fd, unsigned int num_vfs)
 	igt_assert(!err);
 }
 
+/**
+ * SUBTEST: enable-vfs-bind-all-unbind-all
+ * Description:
+ *   Verify VFs enabling, binding the driver and then unbinding it from all of them
+ */
+static void enable_vfs_bind_all_unbind_all(int pf_fd, unsigned int num_vfs)
+{
+	igt_debug("Using num_vfs=%u\n", num_vfs);
+
+	igt_require(igt_sriov_get_enabled_vfs(pf_fd) == 0);
+	igt_warn_on(!igt_sriov_disable_driver_autoprobe(pf_fd));
+	igt_skip_on(igt_sriov_is_driver_autoprobe_enabled(pf_fd));
+
+	igt_warn_on(!igt_sriov_enable_vfs(pf_fd, num_vfs));
+	igt_assert_eq(num_vfs, igt_sriov_get_enabled_vfs(pf_fd));
+	igt_warn_on(!igt_sriov_enable_driver_autoprobe(pf_fd));
+	igt_assert(igt_sriov_is_driver_autoprobe_enabled(pf_fd));
+
+	for (int i = 1; i <= num_vfs; i++) {
+		igt_assert(!igt_sriov_is_vf_drm_driver_probed(pf_fd, i));
+		igt_assert(igt_sriov_bind_vf_drm_driver(pf_fd, i));
+		igt_assert(igt_sriov_is_vf_drm_driver_probed(pf_fd, i));
+	}
+
+	for (int i = 1; i <= num_vfs; i++) {
+		igt_assert(igt_sriov_unbind_vf_drm_driver(pf_fd, i));
+		igt_assert(!igt_sriov_is_vf_drm_driver_probed(pf_fd, i));
+	}
+
+	igt_assert(igt_sriov_disable_vfs(pf_fd));
+}
+
 igt_main
 {
 	int pf_fd;
@@ -113,6 +145,25 @@ igt_main
 		}
 	}
 
+	igt_describe("Verify VFs enabling, binding the driver and then unbinding it from all of them");
+	igt_subtest_with_dynamic("enable-vfs-bind-all-unbind-all") {
+		for_each_num_vfs(pf_fd, num_vfs) {
+			igt_dynamic_f("numvfs-%u", num_vfs) {
+				enable_vfs_bind_all_unbind_all(pf_fd, num_vfs);
+			}
+		}
+		for_random_num_vfs(pf_fd, num_vfs) {
+			igt_dynamic_f("numvfs-random") {
+				enable_vfs_bind_all_unbind_all(pf_fd, num_vfs);
+			}
+		}
+		for_max_num_vfs(pf_fd, num_vfs) {
+			igt_dynamic_f("numvfs-all") {
+				enable_vfs_bind_all_unbind_all(pf_fd, num_vfs);
+			}
+		}
+	}
+
 	igt_fixture {
 		igt_sriov_disable_vfs(pf_fd);
 		/* abort to avoid execution of next tests with enabled VFs */
-- 
2.40.0