+static void sbp2util_notify_fetch_agent(struct scsi_id_instance_data *scsi_id,
+ u64 offset, quadlet_t *data, size_t len)
+{
+ /*
+ * There is a small window after a bus reset within which the node
+ * entry's generation is current but the reconnect wasn't completed.
+ */
+ if (atomic_read(&scsi_id->unfinished_reset))
+ return;
+
+ if (hpsb_node_write(scsi_id->ne,
+ scsi_id->sbp2_command_block_agent_addr + offset,
+ data, len))
+ SBP2_ERR("sbp2util_notify_fetch_agent failed.");
+ /*
+ * Now accept new SCSI commands, unless a bus reset happended during
+ * hpsb_node_write.
+ */
+ if (!atomic_read(&scsi_id->unfinished_reset))
+ scsi_unblock_requests(scsi_id->scsi_host);
+}
+
+static void sbp2util_write_orb_pointer(void *p)
+{
+ quadlet_t data[2];
+
+ data[0] = ORB_SET_NODE_ID(
+ ((struct scsi_id_instance_data *)p)->hi->host->node_id);
+ data[1] = ((struct scsi_id_instance_data *)p)->last_orb_dma;
+ sbp2util_cpu_to_be32_buffer(data, 8);
+ sbp2util_notify_fetch_agent(p, SBP2_ORB_POINTER_OFFSET, data, 8);
+}
+
+static void sbp2util_write_doorbell(void *p)
+{
+ sbp2util_notify_fetch_agent(p, SBP2_DOORBELL_OFFSET, NULL, 4);
+}
+