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Commit e65cc194 authored by Mark Nelson's avatar Mark Nelson Committed by Jeff Garzik
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ahci: Enable SB600 64bit DMA on MSI K9A2 Platinum v2 



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: default avatarMark Nelson <mdnelson8@gmail.com>
Signed-off-by: default avatarJeff Garzik <jgarzik@redhat.com>
parent 964fe080

drivers/ata/ahci.c

+35 −5
Original line number Diff line number Diff line
@@ -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)