drm/radeon: sync PT updates as shared v2

Only invalidating PTEs needs to be executed synchronized to using the PT.

v2: fix sync to uses

Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/radeon/radeon_vm.c

@@ -820,7 +820,7 @@ static void radeon_vm_update_ptes(struct radeon_device *rdev,
 		unsigned nptes;
 		uint64_t pte;
 
-		radeon_sync_resv(rdev, &ib->sync, pt->tbo.resv, false);
+		radeon_sync_resv(rdev, &ib->sync, pt->tbo.resv, true);
 
 		if ((addr & ~mask) == (end & ~mask))
 			nptes = end - addr;
@@ -980,6 +980,13 @@ int radeon_vm_bo_update(struct radeon_device *rdev,
 		return r;
 	ib.length_dw = 0;
 
+	if (!(bo_va->flags & RADEON_VM_PAGE_VALID)) {
+		unsigned i;
+
+		for (i = 0; i < RADEON_NUM_RINGS; ++i)
+			radeon_sync_fence(&ib.sync, vm->ids[i].last_id_use);
+	}
+
 	radeon_vm_update_ptes(rdev, vm, &ib, bo_va->it.start,
 			      bo_va->it.last + 1, addr,
 			      radeon_vm_page_flags(bo_va->flags));