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ahci: Enable SB600 64bit DMA on MSI K9A2 Platinum v2

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Like the Asus M2A-VM, MSI's K9A2 Platinum (MS-7376) can also support 64bit
DMA. It is a new enough board that all the BIOS releases work correctly with
64bit DMA enabled.

Signed-off-by: Mark Nelson <mdnelson8@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Mark Nelson 2009-11-03 20:06:48 +11:00 committed by Jeff Garzik
parent 964fe080d9
commit e65cc194f7
1 changed files with 35 additions and 5 deletions
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40
drivers/ata/ahci.c
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@ -2718,6 +2718,30 @@ static bool ahci_sb600_enable_64bit(struct pci_dev *pdev)
},
.driver_data = "20071026", /* yyyymmdd */
},
/*
* All BIOS versions for the MSI K9A2 Platinum (MS-7376)
* support 64bit DMA.
*
* BIOS versions earlier than 1.5 had the Manufacturer DMI
* fields as "MICRO-STAR INTERANTIONAL CO.,LTD".
* This spelling mistake was fixed in BIOS version 1.5, so
* 1.5 and later have the Manufacturer as
* "MICRO-STAR INTERNATIONAL CO.,LTD".
* So try to match on DMI_BOARD_VENDOR of "MICRO-STAR INTER".
*
* BIOS versions earlier than 1.9 had a Board Product Name
* DMI field of "MS-7376". This was changed to be
* "K9A2 Platinum (MS-7376)" in version 1.9, but we can still
* match on DMI_BOARD_NAME of "MS-7376".
*/
{
.ident = "MSI K9A2 Platinum",
.matches = {
DMI_MATCH(DMI_BOARD_VENDOR,
"MICRO-STAR INTER"),
DMI_MATCH(DMI_BOARD_NAME, "MS-7376"),
},
},
{ }
};
const struct dmi_system_id *match;
@ -2729,18 +2753,24 @@ static bool ahci_sb600_enable_64bit(struct pci_dev *pdev)
!match)
return false;
if (!match->driver_data)
goto enable_64bit;
dmi_get_date(DMI_BIOS_DATE, &year, &month, &date);
snprintf(buf, sizeof(buf), "%04d%02d%02d", year, month, date);
if (strcmp(buf, match->driver_data) >= 0) {
dev_printk(KERN_WARNING, &pdev->dev, "%s: enabling 64bit DMA\n",
match->ident);
return true;
} else {
if (strcmp(buf, match->driver_data) >= 0)
goto enable_64bit;
else {
dev_printk(KERN_WARNING, &pdev->dev, "%s: BIOS too old, "
"forcing 32bit DMA, update BIOS\n", match->ident);
return false;
}
enable_64bit:
dev_printk(KERN_WARNING, &pdev->dev, "%s: enabling 64bit DMA\n",
match->ident);
return true;
}
static bool ahci_broken_system_poweroff(struct pci_dev *pdev)