I used this command sequence on RHEL 4 with Emulex HBAs.

First need to see if the cards were detected. A quick grep shows that the are

dmesg | grep -i fib
Emulex LightPulse Fibre Channel SCSI driver 8.0.16.34
scsi0 : HP FC2242SR 4Gb PCI-e DC  Fibre Channel Adapter on PCI bus 13 device 00 irq 185 port 0
scsi1 : HP FC2242SR 4Gb PCI-e DC  Fibre Channel Adapter on PCI bus 13 device 01 irq 193 port 1
scsi2 : HP FC2242SR 4Gb PCI-e DC  Fibre Channel Adapter on PCI bus 17 device 00 irq 193 port 0
scsi3 : HP FC2242SR 4Gb PCI-e DC  Fibre Channel Adapter on PCI bus 17 device 01 irq 169 port 1

lsmod
this shows that the module is loaded
scsi_mod              145041  6 lpfc,scsi_transport_fc,libata,cciss,usb_storage,sd_mod

Here are the WWNs of the cards.

cd /sys/class/scsi_host
cat */port_name
0x10000000c951148e
0x10000000c951148f
0x10000000c9537434
0x10000000c9537435

For Qlogic cards your path is different. Use /sys/class/fc_host for the path

cd /sys/class/fc_host
cat host3/port_name
cat host4/port_name