RE: LSI Logic's Ultra320 320-4X RAID adapter

[Ju, Seokmann]

On Saturday, April 30, 2005 9:02 PM, Kallol wrote:
> The memory space PCI register access can not be used.
I'm not sure what this means. Can you please add more details on it?

> Question #1: Does 320-4X support IO Space device register access?
No, the controller does not support IO mapped I/O.

> Question #2: Do we have a linux driver for it that supports 
> IO ports also?
Yes, to support LSI MegaRAID controllers (typically old controllers), driver
on the 2.4 kernel supports I/O mapped I/O.

Thank you.

Seokmann
LSI Logic Corporation.

> -----Original Message-----
> From: kallol@xxxxxxxxxxxxxx [mailto:kallol@xxxxxxxxxxxxxx] 
> Sent: Saturday, April 30, 2005 9:02 PM
> To: linux-scsi@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx
> Subject: LSI Logic's Ultra320 320-4X RAID adapter
> 
> 
> 
> Hello,
>       We have been evaluting different IO adapters for a 
> storage system vendor.
> 
> LSI logic's 320-4X RAID controller seems to be a good choice.
> 
> There is an issue with the system on which we are measuring 
> performance.
> The memory space PCI register access can not be used.
> 
> Question #1: Does 320-4X support IO Space device register access?
> Question #2: Do we have a linux driver for it that supports 
> IO ports also?
> 
> The megaraid linux driver seems to check the BAR0, if it is 
> memory bar then mem
> space is used otherwise IO space.
> 
> May be the adapter supporting memory space also support IO 
> space access.
> 
> 
> Thanks,
> Kallol
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