Re: sata AHCI controller over non-PCI bus

[Sergei Shtylyov <sshtylyov@ru.mvista.com>]

Hello, I wrote:

>>             I would like to post support for OMAPL138 SATA controller 
>> that is AHCI 1.1 compliant.  OMAPL138 is an ARM926 based platform.
>>
>> Current "ahci.c" assumes that AHCI is getting supported over PCI by 
>> default, whereas the SATA AHCI controller on OMAPL138 is connected to 
>> a non-PCI bus.  Since I am in the process of posting the support I 
>> would like to get the  opinion from the community on how to proceed 
>> on this front.
>
>   Well, you're not the first with this problem, Marvell already had it.

   Er, not Marvell... Synopsis. :-<

>> 2.       Re-organize the ahci.c to abstract the AHCI functionalities 
>> from PCI, non-PCI bus dependencies.
>>
>> Currently we have implemented Option 1 in our internal tree to 
>> support SATA on OMAPL138 platform and it works well.  Ideally I would 
>> want to proceed with Option 2 but would like get feedback from the 
>> community before proceeding in this direction.
>
>   See 
> http://git.kernel.org/?p=linux/kernel/git/jgarzik/libata-dev.git;a=shortlog;h=libahci 
> for Jeff Garzik's work on separating AHCI support from PCI.

   Well, no, it doesn't separate PCI code yet (and the task for this 
patchset was different). Yet it was a step in that direction... I 
suggest that you somehow coordinate with Sagar Borikar, see his initial 
patch here:

http://marc.info/?l=linux-ide&m=123807608819226

MBR, Sergei