Announce: updated "iswraid" (ICH5R/ICH6R ataraid sub-driver) for 2.4.25

Hello,

Attached to this email is a gzipped patch for the next revision of the Intel Software RAID driver "iswraid" (which is an ataraid subdriver) for the 2.4.x series kernels. The patch is taken against kernel 2.4.25 with Jeff Garzik's 2.4.25-libata1.patch already applied. (This driver is useless without libata.) My apologies about the size and the binary nature of this attachment.

Also attached is a very small patch that enables (partial?) Intel's ICH6R chipset's SATA support in the ata_piix driver. I am sure that Jeff can enable this properly (or perhaps already has), but for those who find the chipset unidentified, this may be a quick fix. ICH6R is then usable in both the IDE and RAID modes.

The driver is intended to be used with Intel's ICH5R/ICH6R chipsets. Configuration of RAID volumes is done from the Option ROM. This "iswraid" driver differs from the other ataraid sub-drivers in that it operates on SCSI block devices rather than the ATA/IDE ones. The "ata_piix" driver (part of libata1) presents the SATA disks connected to ICH5R/ICH6R chipsets as SCSI disks. The "iswraid" driver is considered experimental, use at your own risk.

Thanks to Boji Kannanthanam for answering my questions and to Jeff Garzik for providing a great low level driver to utilize.

Please feel free to send me any feedback and/or comments.

Thanks,

Martins Krikis

diff -Naur linux-2.4.25-libata1/drivers/scsi/ata_piix.c linux-2.4.25-libata1-ich6r/drivers/scsi/ata_piix.c
@@ -45,6 +45,7 @@
 	ich5_pata		= 0,
 	ich5_sata		= 1,
 	piix4_pata		= 2,
+	ich6_sata               = 3,
 };
 
 static int piix_init_one (struct pci_dev *pdev,

@@ -71,6 +72,7 @@
 	{ 0x8086, 0x24df, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich5_sata },
 	{ 0x8086, 0x25a3, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich5_sata },
 	{ 0x8086, 0x25b0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich5_sata },
+	{ 0x8086, 0x2652, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6_sata },	
 
 	{ }	/* terminate list */
 };

@@ -175,6 +177,17 @@
 		.udma_mask	= ATA_UDMA_MASK_40C, /* FIXME: cbl det */
 		.port_ops	= &piix_pata_ops,
 	},
+
+	/* ich6_sata */
+	{
+		.sht		= &piix_sht,
+		.host_flags	= ATA_FLAG_SATA | PIIX_FLAG_COMBINED |
+				  ATA_FLAG_SRST | ATA_FLAG_SLAVE_POSS |
+		                  ATA_FLAG_NO_LEGACY,
+		.pio_mask	= 0x03,	/* pio3-4 */
+		.udma_mask	= 0x7f,	/* udma0-6 ; FIXME */
+		.port_ops	= &piix_sata_ops,
+	},
 };
 
 static struct pci_bits piix_enable_bits[] = {

Sorry, that should have been
Martins Krikis
Storage Components Division (SCD)
Intel Massachusetts

It really is an Intel provided driver and I did not update it on my own time. My mailing address personal for the obvious spam-related reasons.

__________________________________
Do you Yahoo!?
Yahoo! Mail SpamGuard - Read only the mail you want.
http://antispam.yahoo.com/tools

Version 0.1.4 of the Intel Sofware RAID driver (iswraid) is now available for the 2.4 series kernels at
http://prdownloads.sourceforge.net/iswraid/2.4.26-libata-iswraid.patch.gz?download

It is an ataraid "subdriver" but uses the SCSI subsystem to find the RAID member disks. It depends on the libata library, particularly the ata_piix driver that enables the Serial ATA capabilities in ICH5/ICH6 chipsets. The libata patch by Jeff Garzik should be applied before applying this patch. There is more information and some ICH6R related patches at the project's home page at http://iswraid.sourceforge.net/.

The changes WRT version 0.1.3 are as follows:
* a fix for CONFIG_HIGHMEM systems;
* reasonable handling of missing disks;
* when RAID1 goes degraded, the I/O succeeds;
* new mode that does not fail degraded RAID1 ever;
* metadata updates started from the scheduler's queue;
* slab caches instead of kmalloc-s;
* small /proc filesystem tweaks;
* serial number extraction fixed;
* unused disks properly freed;
* added documentation file;
* major style changes and more comments about implementation choices.

If you have any questions or comments, please CC me directly because I no longer read this list.

Martins Krikis
Storage Components Division (SCD)
Intel Massachusetts

__________________________________
Do you Yahoo!?
Yahoo! Mail - Helps protect you from nasty viruses.
http://promotions.yahoo.com/new_mail