isci: advertise linkrate

Inform libsas of the linkrate of direct attached links.
Reported-by: Haavard Skinnemoen <hskinnemoen@gmail.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

drivers/scsi/isci/core/scic_phy.h

@@ -72,6 +72,9 @@
 struct scic_sds_phy;
 struct scic_sds_port;
 
+
+enum sas_linkrate sci_phy_linkrate(struct scic_sds_phy *sci_phy);
+
 /**
  * struct scic_phy_properties - This structure defines the properties common to
  *    all phys that can be retrieved.

drivers/scsi/isci/core/scic_sds_phy.c

@@ -73,6 +73,11 @@
 /* Maximum arbitration wait time in micro-seconds */
 #define SCIC_SDS_PHY_MAX_ARBITRATION_WAIT_TIME  (700)
 
+enum sas_linkrate sci_phy_linkrate(struct scic_sds_phy *sci_phy)
+{
+	return sci_phy->max_negotiated_speed;
+}
+
 /*
  * *****************************************************************************
  * * SCIC SDS PHY Internal Methods

drivers/scsi/isci/port.c

@@ -263,6 +263,8 @@ void isci_port_link_up(
 		success = false;
 	}
 
+	isci_phy->sas_phy.phy->negotiated_linkrate = sci_phy_linkrate(phy);
+
 	spin_unlock_irqrestore(&isci_phy->sas_phy.frame_rcvd_lock, flags);
 
 	/* Notify libsas that we have an address frame, if indeed