From: Bhavana Nagendra <bnagendr@redhat.com>
Date: Fri, 29 Feb 2008 11:03:34 -0500
Subject: [sata] SB700/SB800 64bit DMA support
Message-id: 20080229154955.4251.28543.sendpatchset@allegro.boston.redhat.com
O-Subject: [RHEL5.2 PATCH] AMD SB700/SB800 SATA support 64bit DMA
Bugzilla: 434741

Resolves BZ 434741

SB700 SATA controller can support 64 bit DMA, and this patch adds the
necessary support.  Without this patch customers would only be able
to benefit from 4GB system memory even if there is more than 4GB
physical memory in the system with SB700.

This patch has been accepted by kernel.org, the git commit is:

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-
2.6.git;a=commit;h=e39fc8c9fd0bb6f4018186801e4a53a5eccaaf70

4G/6G memory boot     ----------------------   PASS
AHCI/Native IDE/Combine Mode --------   PASS
Hdd performance test     --------------------   PASS
Bonnie++ on hdd   -----------------------------  PASS
Burnintest for 5h   ------------------------------   PASS

Acked-by: Jeff Garzik <jgarzik@redhat.com>
Acked-by: Prarit Bhargava <prarit@redhat.com>

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index 6c8fa83..f11bdbf 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -85,6 +85,7 @@ enum {
 	board_ahci_ign_iferr	= 2,
 	board_ahci_sb600	= 3,
 	board_ahci_mv		= 4,
+	board_ahci_sb700	= 5,
 
 	/* global controller registers */
 	HOST_CAP		= 0x00, /* host capabilities */
@@ -442,6 +443,16 @@ static const struct ata_port_info ahci_port_info[] = {
 		.udma_mask	= ATA_UDMA6,
 		.port_ops	= &ahci_ops,
 	},
+	/* board_ahci_sb700 */
+	{
+		AHCI_HFLAGS	(AHCI_HFLAG_IGN_SERR_INTERNAL |
+				 AHCI_HFLAG_NO_PMP),
+		.flags		= AHCI_FLAG_COMMON,
+		.link_flags	= AHCI_LFLAG_COMMON,
+		.pio_mask	= 0x1f, /* pio0-4 */
+		.udma_mask	= ATA_UDMA6,
+		.port_ops	= &ahci_ops,
+	},
 };
 
 static const struct pci_device_id ahci_pci_tbl[] = {
@@ -484,12 +495,12 @@ static const struct pci_device_id ahci_pci_tbl[] = {
 
 	/* ATI */
 	{ PCI_VDEVICE(ATI, 0x4380), board_ahci_sb600 }, /* ATI SB600 */
-	{ PCI_VDEVICE(ATI, 0x4390), board_ahci_sb600 }, /* ATI SB700/800 */
-	{ PCI_VDEVICE(ATI, 0x4391), board_ahci_sb600 }, /* ATI SB700/800 */
-	{ PCI_VDEVICE(ATI, 0x4392), board_ahci_sb600 }, /* ATI SB700/800 */
-	{ PCI_VDEVICE(ATI, 0x4393), board_ahci_sb600 }, /* ATI SB700/800 */
-	{ PCI_VDEVICE(ATI, 0x4394), board_ahci_sb600 }, /* ATI SB700/800 */
-	{ PCI_VDEVICE(ATI, 0x4395), board_ahci_sb600 }, /* ATI SB700/800 */
+	{ PCI_VDEVICE(ATI, 0x4390), board_ahci_sb700 }, /* ATI SB700/800 */
+	{ PCI_VDEVICE(ATI, 0x4391), board_ahci_sb700 }, /* ATI SB700/800 */
+	{ PCI_VDEVICE(ATI, 0x4392), board_ahci_sb700 }, /* ATI SB700/800 */
+	{ PCI_VDEVICE(ATI, 0x4393), board_ahci_sb700 }, /* ATI SB700/800 */
+	{ PCI_VDEVICE(ATI, 0x4394), board_ahci_sb700 }, /* ATI SB700/800 */
+	{ PCI_VDEVICE(ATI, 0x4395), board_ahci_sb700 }, /* ATI SB700/800 */
 
 	/* VIA */
 	{ PCI_VDEVICE(VIA, 0x3349), board_ahci_vt8251 }, /* VIA VT8251 */