Re: Acard ATP8620 2SATA / 1 IDE driver - AHCI.C Nov082007

[Mark Lord <liml@rtr.ca>]

Jeff Garzik wrote:
> On Thu, Nov 08, 2007 at 02:52:26PM -0500, Mark Lord wrote:
>> Jeff Garzik wrote:
>>> ..
>>> 2) This chip includes target mode support.  Very nice, well done!
>>> I hope that standard AHCI eventually supports this nice feature!
>> ..
>>
>> Speaking of which.  Do we have a strategy as to how to implement/support
>> the target side of target mode on controllers which can do it?
>>
>> The Marvell chips also have a target mode feature, and I'd like to add
>> support for it soon-ish, but it's now clear how you would like it plumbed
>> into libata.
>>
>> It's almost like a separate driver/subsystem, except that would be very 
>> silly.
> 
> I'm letting the SCSI folks do the heavy lifting, implementing SCSI
> target mode -- an effort already quite well along.
> 
> We should be able to piggyback off of that work.
..

MMmm..  I wonder what the most common use case is for target mode?

Everybody I've dealt with thus far uses it as a high-speed local comms interface,
which would suggest that it might be done as a network interface (ethernet emulation).

But that would confusingly go across driver subsystems,
despite that this is how it actually is used.