Signed-off-by: Andy Currid <[EMAIL PROTECTED]> Signed-off-by: Peer Chen <[EMAIL PROTECTED]>
--- --- linux-2.6.24-rc7/drivers/pci/quirks.c.orig 2008-01-09 16:37:36.000000000 -0500 +++ linux-2.6.24-rc7/drivers/pci/quirks.c 2008-01-10 15:03:09.000000000 -0500 @@ -1705,6 +1705,70 @@ static void __devinit quirk_nvidia_ck804 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_CK804_PCIE, quirk_nvidia_ck804_msi_ht_cap); +/* + * Force enable MSI mapping capability on HT bridges */ +static inline void ht_enable_msi_mapping(struct pci_dev *dev) +{ + int pos, ttl = 48; + + pos = pci_find_ht_capability(dev, HT_CAPTYPE_MSI_MAPPING); + while (pos && ttl--) { + u8 flags; + + if (pci_read_config_byte(dev, pos + HT_MSI_FLAGS, &flags) == 0) { + printk(KERN_INFO "PCI: Enabling HT MSI Mapping on %s\n", + dev->dev.bus_id); + + pci_write_config_byte(dev, pos + HT_MSI_FLAGS, + flags | HT_MSI_FLAGS_ENABLE); + } + pos = pci_find_next_ht_capability(dev, pos, + HT_CAPTYPE_MSI_MAPPING); + } +} + +static void __devinit nv_msi_ht_cap_quirk(struct pci_dev *dev) { + + struct pci_dev *host_bridge; + int pos, ttl = 48; + + /* HT MSI mapping should be disabled on devices that are below + * a non-Hypertransport host bridge. Locate the host bridge... + */ + + if ((host_bridge = pci_get_bus_and_slot(0, PCI_DEVFN(0,0))) == NULL) { + printk(KERN_WARNING + "PCI: nv_msi_ht_cap_quirk didn't locate host bridge\n"); + return; + } + + if ((pos = pci_find_ht_capability(host_bridge, HT_CAPTYPE_SLAVE)) != 0) { + /* Host bridge is to HT */ + ht_enable_msi_mapping(dev); + return; + } + + /* Host bridge is not to HT, disable HT MSI mapping on this device */ + + pos = pci_find_ht_capability(dev, HT_CAPTYPE_MSI_MAPPING); + while (pos && ttl--) { + u8 flags; + + if (pci_read_config_byte(dev, pos + HT_MSI_FLAGS, &flags) == 0) { + printk(KERN_INFO "PCI: Quirk disabling HT MSI mapping on %s\n", + pci_name(dev)); + + pci_write_config_byte(dev, pos + HT_MSI_FLAGS, + flags & ~HT_MSI_FLAGS_ENABLE); + } + pos = pci_find_next_ht_capability(dev, pos, + HT_CAPTYPE_MSI_MAPPING); + } +} + +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NVIDIA, PCI_ANY_ID, + nv_msi_ht_cap_quirk); + static void __devinit quirk_msi_intx_disable_bug(struct pci_dev *dev) { dev->dev_flags |= PCI_DEV_FLAGS_MSI_INTX_DISABLE_BUG; - -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/