Some AIX stuffGSC is a generic passthrough driver for AIX.
The original version has been written by Matthew Jacob and is available here.
This version supports AIX 4.3.3 and AIX 5.1L (32 and 64 bits kernels). If you are using an older version of AIX ( < 4.3.3 ), use the original GSC.
I don't have access to an AIX machine anymore, so I can't help you if it doesn't work.
The driver's licence is the GNU GPL v2.
Note: I have been contracted to update the driver to support AIX 6 and 7 and fiber channel adapters. You can get the source and a binary at Gresham Enterprise Storage