Merge branch 'topic/usb-audio' into for-linus

[pandora-kernel.git] / drivers / ata / ahci.c

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index 15a2303..fe3eba5 100644 (file)
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -219,6 +219,8 @@ enum {
        AHCI_HFLAG_SECT255              = (1 << 8), /* max 255 sectors */
        AHCI_HFLAG_YES_NCQ              = (1 << 9), /* force NCQ cap on */
        AHCI_HFLAG_NO_SUSPEND           = (1 << 10), /* don't suspend */
+       AHCI_HFLAG_SRST_TOUT_IS_OFFLINE = (1 << 11), /* treat SRST timeout as
+                                                       link offline */
 
        /* ap->flags bits */
 
@@ -513,11 +515,16 @@ static const struct pci_device_id ahci_pci_tbl[] = {
        { PCI_VDEVICE(INTEL, 0x502a), board_ahci }, /* Tolapai */
        { PCI_VDEVICE(INTEL, 0x502b), board_ahci }, /* Tolapai */
        { PCI_VDEVICE(INTEL, 0x3a05), board_ahci }, /* ICH10 */
+       { PCI_VDEVICE(INTEL, 0x3a22), board_ahci }, /* ICH10 */
        { PCI_VDEVICE(INTEL, 0x3a25), board_ahci }, /* ICH10 */
+       { PCI_VDEVICE(INTEL, 0x3b22), board_ahci }, /* PCH AHCI */
+       { PCI_VDEVICE(INTEL, 0x3b23), board_ahci }, /* PCH AHCI */
        { PCI_VDEVICE(INTEL, 0x3b24), board_ahci }, /* PCH RAID */
        { PCI_VDEVICE(INTEL, 0x3b25), board_ahci }, /* PCH RAID */
+       { PCI_VDEVICE(INTEL, 0x3b29), board_ahci }, /* PCH AHCI */
        { PCI_VDEVICE(INTEL, 0x3b2b), board_ahci }, /* PCH RAID */
        { PCI_VDEVICE(INTEL, 0x3b2c), board_ahci }, /* PCH RAID */
+       { PCI_VDEVICE(INTEL, 0x3b2f), board_ahci }, /* PCH AHCI */
 
        /* JMicron 360/1/3/5/6, match class to avoid IDE function */
        { PCI_VENDOR_ID_JMICRON, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
@@ -1658,6 +1665,7 @@ static int ahci_do_softreset(struct ata_link *link, unsigned int *class,
                             int (*check_ready)(struct ata_link *link))
 {
        struct ata_port *ap = link->ap;
+       struct ahci_host_priv *hpriv = ap->host->private_data;
        const char *reason = NULL;
        unsigned long now, msecs;
        struct ata_taskfile tf;
@@ -1696,12 +1704,21 @@ static int ahci_do_softreset(struct ata_link *link, unsigned int *class,
 
        /* wait for link to become ready */
        rc = ata_wait_after_reset(link, deadline, check_ready);
-       /* link occupied, -ENODEV too is an error */
-       if (rc) {
+       if (rc == -EBUSY && hpriv->flags & AHCI_HFLAG_SRST_TOUT_IS_OFFLINE) {
+               /*
+                * Workaround for cases where link online status can't
+                * be trusted.  Treat device readiness timeout as link
+                * offline.
+                */
+               ata_link_printk(link, KERN_INFO,
+                               "device not ready, treating as offline\n");
+               *class = ATA_DEV_NONE;
+       } else if (rc) {
+               /* link occupied, -ENODEV too is an error */
                reason = "device not ready";
                goto fail;
-       }
-       *class = ahci_dev_classify(ap);
+       } else
+               *class = ahci_dev_classify(ap);
 
        DPRINTK("EXIT, class=%u\n", *class);
        return 0;
@@ -1768,7 +1785,8 @@ static int ahci_sb600_softreset(struct ata_link *link, unsigned int *class,
                irq_sts = readl(port_mmio + PORT_IRQ_STAT);
                if (irq_sts & PORT_IRQ_BAD_PMP) {
                        ata_link_printk(link, KERN_WARNING,
-                                       "failed due to HW bug, retry pmp=0\n");
+                                       "applying SB600 PMP SRST workaround "
+                                       "and retrying\n");
                        rc = ahci_do_softreset(link, class, 0, deadline,
                                               ahci_check_ready);
                }
@@ -2721,6 +2739,56 @@ static bool ahci_broken_suspend(struct pci_dev *pdev)
        return !ver || strcmp(ver, dmi->driver_data) < 0;
 }
 
+static bool ahci_broken_online(struct pci_dev *pdev)
+{
+#define ENCODE_BUSDEVFN(bus, slot, func)                       \
+       (void *)(unsigned long)(((bus) << 8) | PCI_DEVFN((slot), (func)))
+       static const struct dmi_system_id sysids[] = {
+               /*
+                * There are several gigabyte boards which use
+                * SIMG5723s configured as hardware RAID.  Certain
+                * 5723 firmware revisions shipped there keep the link
+                * online but fail to answer properly to SRST or
+                * IDENTIFY when no device is attached downstream
+                * causing libata to retry quite a few times leading
+                * to excessive detection delay.
+                *
+                * As these firmwares respond to the second reset try
+                * with invalid device signature, considering unknown
+                * sig as offline works around the problem acceptably.
+                */
+               {
+                       .ident = "EP45-DQ6",
+                       .matches = {
+                               DMI_MATCH(DMI_BOARD_VENDOR,
+                                         "Gigabyte Technology Co., Ltd."),
+                               DMI_MATCH(DMI_BOARD_NAME, "EP45-DQ6"),
+                       },
+                       .driver_data = ENCODE_BUSDEVFN(0x0a, 0x00, 0),
+               },
+               {
+                       .ident = "EP45-DS5",
+                       .matches = {
+                               DMI_MATCH(DMI_BOARD_VENDOR,
+                                         "Gigabyte Technology Co., Ltd."),
+                               DMI_MATCH(DMI_BOARD_NAME, "EP45-DS5"),
+                       },
+                       .driver_data = ENCODE_BUSDEVFN(0x03, 0x00, 0),
+               },
+               { }     /* terminate list */
+       };
+#undef ENCODE_BUSDEVFN
+       const struct dmi_system_id *dmi = dmi_first_match(sysids);
+       unsigned int val;
+
+       if (!dmi)
+               return false;
+
+       val = (unsigned long)dmi->driver_data;
+
+       return pdev->bus->number == (val >> 8) && pdev->devfn == (val & 0xff);
+}
+
 static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 {
        static int printed_version;
@@ -2836,6 +2904,12 @@ static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
                           "BIOS update required for suspend/resume\n");
        }
 
+       if (ahci_broken_online(pdev)) {
+               hpriv->flags |= AHCI_HFLAG_SRST_TOUT_IS_OFFLINE;
+               dev_info(&pdev->dev,
+                        "online status unreliable, applying workaround\n");
+       }
+
        /* CAP.NP sometimes indicate the index of the last enabled
         * port, at other times, that of the last possible port, so
         * determining the maximum port number requires looking at