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 > - > : send the line "unsubscribe > linux-scsi" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > - : send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
