The system's PCI bridge is broken, MEM Mapped IO does not work. Only we can use IO mapped IO to access PCI devices(inb, outb) those are behind the bridge. I am looking for a LSI mega raid adapter (SCSI, SATA or SAS) that supports IO mapped IO and has a linux driver for it. On Mon, 2005-05-02 at 05:56, Ju, Seokmann wrote: > 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-kernel" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ - : 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
