diff options
| -rw-r--r-- | drivers/ata/ahci.c | 60 |
1 files changed, 20 insertions, 40 deletions
diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c index acd1162712b..c95015986c9 100644 --- a/drivers/ata/ahci.c +++ b/drivers/ata/ahci.c @@ -447,7 +447,8 @@ static const struct ata_port_info ahci_port_info[] = { [board_ahci_sb600] = { AHCI_HFLAGS (AHCI_HFLAG_IGN_SERR_INTERNAL | - AHCI_HFLAG_NO_MSI | AHCI_HFLAG_SECT255), + AHCI_HFLAG_NO_MSI | AHCI_HFLAG_SECT255 | + AHCI_HFLAG_32BIT_ONLY), .flags = AHCI_FLAG_COMMON, .pio_mask = ATA_PIO4, .udma_mask = ATA_UDMA6, @@ -2650,17 +2651,15 @@ static void ahci_p5wdh_workaround(struct ata_host *host) } } -/* - * SB600 ahci controller on certain boards can't do 64bit DMA with - * older BIOS. - */ -static bool ahci_sb600_32bit_only(struct pci_dev *pdev) +/* only some SB600 ahci controllers can do 64bit DMA */ +static bool ahci_sb600_enable_64bit(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. + * Enable 64bit DMA on 1501 and anything newer. + * * Please read bko#9412 for more info. */ { @@ -2672,48 +2671,29 @@ static bool ahci_sb600_32bit_only(struct pci_dev *pdev) }, .driver_data = "20071026", /* yyyymmdd */ }, - /* - * It's yet unknown whether more recent BIOS fixes the - * problem. Blacklist the whole board for the time - * being. Please read the following thread for more - * info. - * - * http://thread.gmane.org/gmane.linux.ide/42326 - */ - { - .ident = "Gigabyte GA-MA69VM-S2", - .matches = { - DMI_MATCH(DMI_BOARD_VENDOR, - "Gigabyte Technology Co., Ltd."), - DMI_MATCH(DMI_BOARD_NAME, "GA-MA69VM-S2"), - }, - }, { } }; const struct dmi_system_id *match; + int year, month, date; + char buf[9]; match = dmi_first_match(sysids); if (pdev->bus->number != 0 || pdev->devfn != PCI_DEVFN(0x12, 0) || !match) return false; - 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; + 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 { 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; + return false; + } } static bool ahci_broken_system_poweroff(struct pci_dev *pdev) @@ -2926,9 +2906,9 @@ 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 sb600 32bit only quirk */ - if (ahci_sb600_32bit_only(pdev)) - hpriv->flags |= AHCI_HFLAG_32BIT_ONLY; + /* only some SB600s can do 64bit DMA */ + if (ahci_sb600_enable_64bit(pdev)) + hpriv->flags &= ~AHCI_HFLAG_32BIT_ONLY; if ((hpriv->flags & AHCI_HFLAG_NO_MSI) || pci_enable_msi(pdev)) pci_intx(pdev, 1); |