IB/rdmavt: Add an ibport data structure to rdmavt

Converge the ibport data structures of qib and hfi1 into a common ib
port structure. Also provides a place to keep track of these ports
in case rdmavt needs it. Along with this goes an attach and detach
function for drivers to use to notify rdmavt of the ports.

Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Harish Chegondi <harish.chegondi@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

drivers/infiniband/sw/rdmavt/vt.c

@@ -300,6 +300,19 @@ int rvt_register_device(struct rvt_dev_info *rdi)
 	spin_lock_init(&rdi->n_pds_lock);
 	rdi->n_pds_allocated = 0;
 
+	if (rdi->dparms.nports) {
+		rdi->ports = kcalloc(rdi->dparms.nports,
+				     sizeof(struct rvt_ibport **),
+				     GFP_KERNEL);
+		if (!rdi->ports) {
+			rvt_pr_err(rdi, "Could not allocate port mem.\n");
+			ret = -ENOMEM;
+			goto bail_mr;
+		}
+	} else {
+		rvt_pr_warn(rdi, "Driver says it has no ports.\n");
+	}
+
 	/* We are now good to announce we exist */
 	ret =  ib_register_device(&rdi->ibdev, rdi->driver_f.port_callback);
 	if (ret) {
@@ -327,3 +340,14 @@ void rvt_unregister_device(struct rvt_dev_info *rdi)
 	rvt_mr_exit(rdi);
 }
 EXPORT_SYMBOL(rvt_unregister_device);
+
+/*
+ * Keep track of a list of ports. No need to have a detach port.
+ * They persist until the driver goes away.
+ */
+void rvt_attach_port(struct rvt_dev_info *rdi, struct rvt_ibport *port,
+		     int portnum)
+{
+	rdi->ports[portnum] = port;
+}
+EXPORT_SYMBOL(rvt_attach_port);