Commit 03d783bf authored by Tejun Heo's avatar Tejun Heo Committed by Jeff Garzik
Browse files

ahci: make ahci_asus_m2a_vm_32bit_only() quirk more generic 



It turns out ASUS M2A-VM isn't the only one with the 32bit DMA
problem.  Make ahci_asus_m2a_vm_32bit_only() more generic using the
new dmi_get_date() and rename it to ahci_sb600_32bit_only().  Cut off
date is now pointed to by dmi_system_id->driver_data in "yyyymmdd"
format and it's now also allowed to be omitted.

Signed-off-by: default avatarTejun Heo <tj@kernel.org>
Cc: Sandor Bodo-Merle <sbodomerle@gmail.com>
Cc: Shane Huang <shane.huang@amd.com>
Signed-off-by: default avatarJeff Garzik <jgarzik@redhat.com>
parent 3e5cd1f2

drivers/ata/ahci.c

+29 −24
Original line number Diff line number Diff line
@@ -2647,14 +2647,18 @@ static void ahci_p5wdh_workaround(struct ata_host *host) 
}



/*

 * SB600 ahci controller on ASUS M2A-VM can't do 64bit DMA with older

 * BIOS.  The oldest version known to be broken is 0901 and working is

 * 1501 which was released on 2007-10-26.  Force 32bit DMA on anything

 * older than 1501.  Please read bko#9412 for more info.

 * SB600 ahci controller on certain boards can't do 64bit DMA with

 * older BIOS.

 */

static bool ahci_asus_m2a_vm_32bit_only(struct pci_dev *pdev)

static bool ahci_sb600_32bit_only(struct pci_dev *pdev)

{

	static const struct dmi_system_id sysids[] = {

		/*

		 * The oldest version known to be broken is 0901 and

		 * working is 1501 which was released on 2007-10-26.

		 * Force 32bit DMA on anything older than 1501.

		 * Please read bko#9412 for more info.

		 */

		{

			.ident = "ASUS M2A-VM",

			.matches = {
@@ -2662,31 +2666,32 @@ static bool ahci_asus_m2a_vm_32bit_only(struct pci_dev *pdev) 
					  "ASUSTeK Computer INC."),

				DMI_MATCH(DMI_BOARD_NAME, "M2A-VM"),

			},

			.driver_data = "20071026",	/* yyyymmdd */

		},

		{ }

	};

	const char *cutoff_mmdd = "10/26";

	const char *date;

	int year;

	const struct dmi_system_id *match;



	match = dmi_first_match(sysids);

	if (pdev->bus->number != 0 || pdev->devfn != PCI_DEVFN(0x12, 0) ||

	    !dmi_check_system(sysids))

	    !match)

		return false;



	/*

	 * Argh.... both version and date are free form strings.

	 * Let's hope they're using the same date format across

	 * different versions.

	 */

	date = dmi_get_system_info(DMI_BIOS_DATE);

	dmi_get_date(DMI_BIOS_DATE, &year, NULL, NULL);

	if (date && strlen(date) >= 10 && date[2] == '/' && date[5] == '/' &&

	    (year > 2007 ||

	     (year == 2007 && strncmp(date, cutoff_mmdd, 5) >= 0)))

	if (match->driver_data) {

		int year, month, date;

		char buf[9];



		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)

			return false;



	dev_printk(KERN_WARNING, &pdev->dev, "ASUS M2A-VM: BIOS too old, "

		   "forcing 32bit DMA, update BIOS\n");

		dev_printk(KERN_WARNING, &pdev->dev, "%s: BIOS too old, "

			   "forcing 32bit DMA, update BIOS\n", match->ident);

	} else

		dev_printk(KERN_WARNING, &pdev->dev, "%s: this board can't "

			   "do 64bit DMA, forcing 32bit\n", match->ident);



	return true;

}
@@ -2901,8 +2906,8 @@ static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) 
	if (board_id == board_ahci_sb700 && pdev->revision >= 0x40)

		hpriv->flags &= ~AHCI_HFLAG_IGN_SERR_INTERNAL;



	/* apply ASUS M2A_VM quirk */

	if (ahci_asus_m2a_vm_32bit_only(pdev))

	/* apply sb600 32bit only quirk */

	if (ahci_sb600_32bit_only(pdev))

		hpriv->flags |= AHCI_HFLAG_32BIT_ONLY;



	if (!(hpriv->flags & AHCI_HFLAG_NO_MSI))

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