Marvell SATA controller (MV 88SX6081) problem in running
 

We have Marvell Serial ATA controller (MV 88SX6081) and also Marvell - 88SX50xx and

88SX60X1 software driver. We are using this on Linux kernel 2.4.20.
1. We have a driver which is directly interfaced to scsi mid layer.(This is SCSI target emulator driver).To which we are
sending scsi cdb,s.Our driver is working fine with the SCSI disks.
But when we used marvell driver and SATA disk and passed INQUIRY CDB system hangs.
We are able to see sata disk as a scsi device and also able to work on it.
But it is failing when we use our driver which is interfaced to the mid layer of linux scsi subsystem.
So can you tell us what is the reason?

2.We have also observed that when we insert the driver module it takes quite long time
before it exposes the disks as scsi devices.It undergoes lot of retries.(we have traced the scsi mid layer)

3.We have seen from documents that there is one layer that converts scsi commands to ATA.This i think is LIbATA layer.I also tried to find email-id of Jeff Garzik but i couldn't get it.I would like to know the layer at which libata is available?