In versions of VMware ESXi prior to 5.5, it was possible to find out the exact model of an HBA and the exact firmware and driver versions by checking the /proc/scsi/qla2xxx/ folder (for QLogic) and /proc/scsi/lpfc820/ folder (for Emulex).
Starting with ESXi 5.5, you do not see native drivers in the /proc nodes.
To view native driver information, run the command:
The output is very similar:
For more information see the following VMware KB: