scsi: smartpqi: Add phy ID support for the physical drives

Display topology using PHY numbers. PHY (both local and remote) numbers
corresponding to physical drives are read from
BMIC_IDENTIFY_PHYSICAL_DEVICE.

Link: https://lore.kernel.org/r/161549383947.25025.16977895345376485056.stgit@brunhilda
Reviewed-by: Scott Benesh <scott.benesh@microchip.com>
Reviewed-by: Mike McGowen <mike.mcgowen@microchip.com>
Reviewed-by: Scott Teel <scott.teel@microchip.com>
Reviewed-by: Kevin Barnett <kevin.barnett@microchip.com>
Reviewed-by: Martin Wilck <mwilck@suse.com>
Signed-off-by: Murthy Bhat <Murthy.Bhat@microchip.com>
Signed-off-by: Don Brace <don.brace@microchip.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Author: Murthy Bhat

drivers/scsi/smartpqi/smartpqi.h

@@ -1089,6 +1089,7 @@ struct pqi_scsi_dev {
 	u8	phy_connected_dev_type;
 	u8	box[8];
 	u16	phys_connector[8];
+	u8	phy_id;
 	bool	raid_bypass_configured;	/* RAID bypass configured */
 	bool	raid_bypass_enabled;	/* RAID bypass enabled */
 	u32	next_bypass_group;

drivers/scsi/smartpqi/smartpqi_init.c

@@ -1434,6 +1434,8 @@ static void pqi_get_volume_status(struct pqi_ctrl_info *ctrl_info,
 	device->volume_offline = volume_offline;
 }
 
+#define PQI_DEVICE_PHY_MAP_SUPPORTED	0x10
+
 static int pqi_get_physical_device_info(struct pqi_ctrl_info *ctrl_info,
 	struct pqi_scsi_dev *device,
 	struct bmic_identify_physical_device *id_phys)
@@ -1473,6 +1475,13 @@ static int pqi_get_physical_device_info(struct pqi_ctrl_info *ctrl_info,
 	memcpy(&device->page_83_identifier, &id_phys->page_83_identifier,
 		sizeof(device->page_83_identifier));
 
+	if ((id_phys->even_more_flags & PQI_DEVICE_PHY_MAP_SUPPORTED) &&
+		id_phys->phy_count)
+		device->phy_id =
+			id_phys->phy_to_phy_map[device->active_path_index];
+	else
+		device->phy_id = 0xFF;
+
 	return 0;
 }
 
@@ -1839,6 +1848,7 @@ static void pqi_scsi_update_device(struct pqi_scsi_dev *existing_device,
 	existing_device->aio_handle = new_device->aio_handle;
 	existing_device->volume_status = new_device->volume_status;
 	existing_device->active_path_index = new_device->active_path_index;
+	existing_device->phy_id = new_device->phy_id;
 	existing_device->path_map = new_device->path_map;
 	existing_device->bay = new_device->bay;
 	existing_device->box_index = new_device->box_index;

drivers/scsi/smartpqi/smartpqi_sas_transport.c

@@ -92,6 +92,7 @@ static int pqi_sas_port_add_rphy(struct pqi_sas_port *pqi_sas_port,
 
 	identify = &rphy->identify;
 	identify->sas_address = pqi_sas_port->sas_address;
+	identify->phy_identifier = pqi_sas_port->device->phy_id;
 
 	if (pqi_sas_port->device &&
 		pqi_sas_port->device->is_expander_smp_device) {