[igt-dev] [PATCH i-g-t] lib/xe/xe_spin: Integrate igt_spin_new with Xe.

[sai.gowtham.ch at intel.com]

From: Sai Gowtham Ch <sai.gowtham.ch at intel.com>

Extending the spin_create implementation and allocator handle support in xe,
where it submits dummy work loads to engine. This Implementation is wrapped
around vm_bind and unbind as we are supposed to do it manually for xe.

Cc: Zbigniew Kempczyński <zbigniew.kempczynski at intel.com>
Signed-off-by: Sai Gowtham Ch <sai.gowtham.ch at intel.com>
---
 lib/xe/xe_spin.c | 39 +++++++++++++++++++++++++++++++++++++++
 lib/xe/xe_spin.h |  9 +++++++++
 2 files changed, 48 insertions(+)

diff --git a/lib/xe/xe_spin.c b/lib/xe/xe_spin.c
index 856d0ba2..e0629419 100644
--- a/lib/xe/xe_spin.c
+++ b/lib/xe/xe_spin.c
@@ -82,6 +82,45 @@ void xe_spin_end(struct xe_spin *spin)
 	spin->end = 0;
 }
 
+void xe_spin_new(int fd, struct xe_spin *spin, struct drm_xe_engine_class_instance *eci)
+{
+	size_t bo_size = xe_get_default_alignment(fd);
+	uint32_t syncobj;
+	uint64_t ahnd = spin->ahnd, addr;
+	struct drm_xe_sync sync = {
+		.flags = DRM_XE_SYNC_SYNCOBJ | DRM_XE_SYNC_SIGNAL,
+	};
+	struct drm_xe_exec exec = {
+		.num_batch_buffer = 1,
+		.num_syncs = 1,
+		.syncs = to_user_pointer(&sync),
+	};
+
+	spin->vm = xe_vm_create(fd, 0, 0);
+	spin->bo = xe_bo_create(fd, eci->gt_id, spin->vm, bo_size);
+	spin->engine = xe_engine_create(fd, spin->vm, eci, 0);
+	syncobj = syncobj_create(fd, 0);
+
+	if (ahnd)
+		addr = intel_allocator_alloc_with_strategy(ahnd, spin->bo, bo_size, 0, ALLOC_STRATEGY_LOW_TO_HIGH);
+
+	xe_vm_bind_sync(fd, spin->vm, spin->bo, 0, addr, bo_size);
+
+	xe_spin_init(spin, addr, true);
+	exec.engine_id = spin->engine;
+	exec.address = addr;
+	sync.handle = syncobj;
+
+	igt_assert_eq(igt_ioctl(fd, DRM_IOCTL_XE_EXEC, &exec), 0);
+
+}
+
+void xe_spin_free(struct xe_spin *spin)
+{
+	xe_engine_destroy(spin->fd, spin->engine);
+	xe_vm_destroy(spin->fd, spin->vm);
+	gem_close(spin->fd, spin->bo);
+}
 void xe_cork_init(int fd, struct drm_xe_engine_class_instance *hwe,
 		  struct xe_cork *cork)
 {
diff --git a/lib/xe/xe_spin.h b/lib/xe/xe_spin.h
index 73f9a026..12116445 100644
--- a/lib/xe/xe_spin.h
+++ b/lib/xe/xe_spin.h
@@ -17,15 +17,24 @@
 /* Mapped GPU object */
 struct xe_spin {
 	uint32_t batch[16];
+	int fd;
 	uint64_t pad;
 	uint32_t start;
 	uint32_t end;
+	uint64_t ahnd;
+	uint32_t engine;
+	uint32_t vm;
+	uint32_t bo;
+
 };
 
 void xe_spin_init(struct xe_spin *spin, uint64_t addr, bool preempt);
 bool xe_spin_started(struct xe_spin *spin);
 void xe_spin_wait_started(struct xe_spin *spin);
 void xe_spin_end(struct xe_spin *spin);
+void xe_spin_new(int fd, struct xe_spin *spin,
+		struct drm_xe_engine_class_instance *hwe);
+void xe_spin_free(struct xe_spin *spin);
 
 struct xe_cork {
 	struct xe_spin *spin;
-- 
2.39.1