+
+/**
+ * cio_tm_start_key - perform start function
+ * @sch: subchannel on which to perform the start function
+ * @tcw: transport-command word to be started
+ * @lpm: mask of paths to use
+ * @key: storage key to use for storage access
+ *
+ * Start the tcw on the given subchannel. Return zero on success, non-zero
+ * otherwise.
+ */
+int cio_tm_start_key(struct subchannel *sch, struct tcw *tcw, u8 lpm, u8 key)
+{
+ int cc;
+ union orb *orb = &to_io_private(sch)->orb;
+
+ memset(orb, 0, sizeof(union orb));
+ orb->tm.intparm = (u32) (addr_t) sch;
+ orb->tm.key = key >> 4;
+ orb->tm.b = 1;
+ orb->tm.lpm = lpm ? lpm : sch->lpm;
+ orb->tm.tcw = (u32) (addr_t) tcw;
+ cc = ssch(sch->schid, orb);
+ switch (cc) {
+ case 0:
+ return 0;
+ case 1:
+ case 2:
+ return -EBUSY;
+ default:
+ return cio_start_handle_notoper(sch, lpm);
+ }
+}
+
+/**
+ * cio_tm_intrg - perform interrogate function
+ * @sch - subchannel on which to perform the interrogate function
+ *
+ * If the specified subchannel is running in transport-mode, perform the
+ * interrogate function. Return zero on success, non-zero otherwie.
+ */
+int cio_tm_intrg(struct subchannel *sch)
+{
+ int cc;
+
+ if (!to_io_private(sch)->orb.tm.b)
+ return -EINVAL;
+ cc = xsch(sch->schid);
+ switch (cc) {
+ case 0:
+ case 2:
+ return 0;
+ case 1:
+ return -EBUSY;
+ default:
+ return -ENODEV;
+ }
+}