[PATCH i-g-t v14 03/11] lib/xe: Add synchronous helpers for VM bind/unbind operations

[nishit.sharma@intel.com]

From: Nishit Sharma <nishit.sharma@intel.com>

Introduce synchronous wrappers for VM bind/unbind operations that handle
user fence allocation, waiting, and cleanup internally. This simplifies
test code by eliminating repetitive synchronization boilerplate.

Signed-off-by: Nishit Sharma <nishit.sharma@intel.com>
Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Pravalika Gurram <pravalika.gurram@intel.com>
---
 lib/xe/xe_ioctl.c | 39 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)

diff --git a/lib/xe/xe_ioctl.c b/lib/xe/xe_ioctl.c
index e3efe12ad..16aae05c9 100644
--- a/lib/xe/xe_ioctl.c
+++ b/lib/xe/xe_ioctl.c
@@ -774,3 +774,42 @@ void xe_vm_madvise(int fd, uint32_t vm, uint64_t addr, uint64_t range,
 	igt_assert_eq(__xe_vm_madvise(fd, vm, addr, range, ext, type, op_val, policy,
 				      instance), 0);
 }
+
+#define	BIND_SYNC_VAL	0x686868
+void xe_vm_bind_lr_sync(int fd, uint32_t vm, uint32_t bo, uint64_t offset,
+			uint64_t addr, uint64_t size, uint32_t flags)
+{
+	volatile uint64_t *sync_addr = malloc(sizeof(*sync_addr));
+	struct drm_xe_sync sync = {
+		.flags = DRM_XE_SYNC_FLAG_SIGNAL,
+		.type = DRM_XE_SYNC_TYPE_USER_FENCE,
+		.addr = to_user_pointer((uint64_t *)sync_addr),
+		.timeline_value = BIND_SYNC_VAL,
+	};
+
+	igt_assert(!!sync_addr);
+	xe_vm_bind_async_flags(fd, vm, 0, bo, 0, addr, size, &sync, 1, flags);
+	if (*sync_addr != BIND_SYNC_VAL)
+		xe_wait_ufence(fd, (uint64_t *)sync_addr, BIND_SYNC_VAL, 0, NSEC_PER_SEC * 10);
+	/* Only free if the wait succeeds */
+	free((void *)sync_addr);
+}
+
+void xe_vm_unbind_lr_sync(int fd, uint32_t vm, uint64_t offset,
+			  uint64_t addr, uint64_t size)
+{
+	volatile uint64_t *sync_addr = malloc(sizeof(*sync_addr));
+	struct drm_xe_sync sync = {
+		.flags = DRM_XE_SYNC_FLAG_SIGNAL,
+		.type = DRM_XE_SYNC_TYPE_USER_FENCE,
+		.addr = to_user_pointer((uint64_t *)sync_addr),
+		.timeline_value = BIND_SYNC_VAL,
+	};
+
+	igt_assert(!!sync_addr);
+	*sync_addr = 0;
+	xe_vm_unbind_async(fd, vm, 0, 0, addr, size, &sync, 1);
+	if (*sync_addr != BIND_SYNC_VAL)
+		xe_wait_ufence(fd, (uint64_t *)sync_addr, BIND_SYNC_VAL, 0, NSEC_PER_SEC * 10);
+	free((void *)sync_addr);
+}
-- 
2.48.1