[PATCH v4 1/2] tests/intel/xe_vm: Test zero number of VM binds

[Matthew Brost <matthew.brost@intel.com>]

Verify the bind queue ordering works wrt out-sync signaling when zero
number of binds passed to VM bind IOCTL.

v2:
 - Fix build error
v3:
 - Adjust patch subject (Kamil)
 - Make xe_vm_bind_zero a static function in xe_vm.c (Kamil)

Signed-off-by: Matthew Brost <matthew.brost@intel.com>
---
 tests/intel/xe_vm.c | 76 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 76 insertions(+)

diff --git a/tests/intel/xe_vm.c b/tests/intel/xe_vm.c
index a4f6c7a0b4..2b050f32c8 100644
--- a/tests/intel/xe_vm.c
+++ b/tests/intel/xe_vm.c
@@ -728,6 +728,76 @@ test_bind_execqueues_independent(int fd, struct drm_xe_engine_class_instance *ec
 	xe_vm_destroy(fd, vm);
 }
 
+static void xe_vm_bind_zero(int fd, uint32_t vm, uint32_t exec_queue,
+			    struct drm_xe_sync *sync, uint32_t num_syncs)
+{
+	struct drm_xe_vm_bind bind = {
+		.vm_id = vm,
+		.num_syncs = num_syncs,
+		.syncs = (uintptr_t)sync,
+		.exec_queue_id = exec_queue,
+	};
+
+	igt_assert_eq(igt_ioctl(fd, DRM_IOCTL_XE_VM_BIND, &bind), 0);
+}
+
+/**
+ * SUBTEST: zero-binds
+ * Description: Test zero binds in IOCTL
+ * Functionality: bind engines
+ * Run type: BAT
+ */
+
+static void test_zero_binds(int fd, struct drm_xe_engine_class_instance *eci)
+{
+	uint32_t vm;
+	uint64_t addr = 0x1a0000;
+	struct drm_xe_sync sync[1] = {
+		{ .flags = DRM_XE_SYNC_TYPE_SYNCOBJ | DRM_XE_SYNC_FLAG_SIGNAL, },
+	};
+	size_t bo_size;
+	uint32_t bo = 0;
+	struct xe_cork cork;
+
+	vm = xe_vm_create(fd, 0, 0);
+	bo_size = ALIGN(xe_cs_prefetch_size(fd),
+			xe_get_default_alignment(fd));
+	bo = xe_bo_create(fd, vm, bo_size,
+			  vram_if_possible(fd, eci->gt_id),
+			  DRM_XE_GEM_CREATE_FLAG_NEEDS_VISIBLE_VRAM);
+
+	xe_cork_init(fd, eci, &cork);
+	xe_cork_wait_started(&cork);
+
+	/* Initial bind behind cork */
+	sync[0].handle = cork.syncobj;
+	sync[0].flags &= ~DRM_XE_SYNC_FLAG_SIGNAL;
+	xe_vm_bind_async(fd, vm, 0, bo, 0, addr, bo_size, sync, 1);
+
+	/* Bind /w num_binds == 0 */
+	sync[0].handle = syncobj_create(fd, 0);
+	sync[0].flags |= DRM_XE_SYNC_FLAG_SIGNAL;
+	xe_vm_bind_zero(fd, vm, 0, sync, 1);
+
+	/* Let jobs runs for a bit */
+	usleep(100000);
+
+	/* both binds are waiting */
+	igt_assert(!syncobj_wait(fd, &sync[0].handle, 1, 0, 0, NULL));
+
+	/* Release cork */
+	xe_cork_end(&cork);
+	xe_cork_wait_done(&cork);
+	xe_cork_fini(&cork);
+
+	/* both binds are done */
+	igt_assert(syncobj_wait(fd, &sync[0].handle, 1, INT64_MAX, 0, NULL));
+
+	syncobj_destroy(fd, sync[0].handle);
+	gem_close(fd, bo);
+	xe_vm_destroy(fd, vm);
+}
+
 #define BIND_ARRAY_BIND_EXEC_QUEUE_FLAG	(0x1 << 0)
 
 
@@ -1998,6 +2068,12 @@ igt_main
 		xe_for_each_engine(fd, hwe)
 			test_bind_execqueues_independent(fd, hwe, CONFLICT);
 
+	igt_subtest("zero-binds")
+		xe_for_each_engine(fd, hwe) {
+			test_zero_binds(fd, hwe);
+			break;
+		}
+
 	igt_subtest("bind-array-twice")
 		xe_for_each_engine(fd, hwe)
 			test_bind_array(fd, hwe, 2, 0);
-- 
2.34.1