RFC Resend SCSI target for IBM Power5 LPAR

The dog ate my homework. No, that's not it, the mailer ate my patches. In any case, since most of the mailing list mailers ate my (>100K) patches, here's the same thing broken up.

his device driver provides the SCSI target side of the "virtual SCSI" on IBM Power5 systems. The initiator side has been in mainline for a while now (drivers/scsi/ibmvscsi/ibmvscsi.c.) Targets already exist for AIX and OS/400.

One of the biggest discussions, I expect, will be whether much of this belongs in user-land. We have had considerable debates on that subject, and ended up with it all in the kernel. Unlike some other targets (e.g. iSCSI) that sit on top of nice TCP/IP stacks, this one interacts at a pretty low level with the firmware. There weren't any good user-land splits that seemed to make sense (and looking at the history of the NFS server also influenced the discussion.)

This is currently just an RFC...if my boxers survive the flamage I'll submit it for inclusion.

As an additional note, Cristoph already pointed me to Mike Christie and Tomonori Fujita who are doing some similar work

Thanks

Dave B