Messages in this thread Patch in this message | | | Subject | [PATCH] Intel Alder IOAPIC fix | From | James Bottomley <> | Date | 11 Jan 2004 21:55:16 -0500 |
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The intel alder motherboard really dislikes the way the current kernel reassigns all PCI resources. It exports 6 memory bars from its Extended Express System Support Controller, but if the system touches any of them, it disables the secondary IO-APIC.
The system is bootable if you disable all IO-APICs apart from the primary, but it does become a bit crowded in interrupt space. The patch fixes the problem by adding a quirk to clear the first six memory bars.
James
# This is a BitKeeper generated patch for the following project: # Project Name: Linux kernel tree # This patch format is intended for GNU patch command version 2.5 or higher. # This patch includes the following deltas: # ChangeSet 1.1530 -> 1.1531 # drivers/pci/quirks.c 1.38 -> 1.39 # include/linux/pci_ids.h 1.130 -> 1.131 # # The following is the BitKeeper ChangeSet Log # -------------------------------------------- # 04/01/11 root@claymoor.il.steeleye.com 1.1531 # Fix intel alder boot failure # # The alder has an intel Extended Express System Support Controller # which presents apparently spurious BARs. When the pci resource # code tries to reassign these BARs, the second IO-APIC gets disabled # (with disastrous consequences). # # The patch adds a quirk to clear these BARs. # -------------------------------------------- # diff -Nru a/drivers/pci/quirks.c b/drivers/pci/quirks.c --- a/drivers/pci/quirks.c Sun Jan 11 20:51:06 2004 +++ b/drivers/pci/quirks.c Sun Jan 11 20:51:06 2004 @@ -786,6 +786,28 @@ sis_96x_compatible = 1; } +#ifdef CONFIG_X86_IO_APIC +static void __init quirk_alder_ioapic(struct pci_dev *pdev) +{ + struct resource *res; + int i; + + if ((pdev->class >> 8) != 0xff00) + return; + + res = &pdev->resource[0]; + /* The first six bars must be cleared otherwise the IO-APIC + * will throw a wobbly when the pci resource allocation tries + * to reassign them */ + for(i=0; i < 6; i++) { + res[i].start = 0; + res[i].end = 0; + res[i].flags = 0; + } + +} +#endif + #ifdef CONFIG_SCSI_SATA static void __init quirk_intel_ide_combined(struct pci_dev *pdev) { @@ -910,6 +932,7 @@ { PCI_FIXUP_FINAL, PCI_VENDOR_ID_SI, PCI_ANY_ID, quirk_ioapic_rmw }, { PCI_FIXUP_FINAL, PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_8131_APIC, quirk_amd_8131_ioapic }, + { PCI_FIXUP_HEADER, PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_EESSC, quirk_alder_ioapic }, #endif { PCI_FIXUP_HEADER, PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C586_3, quirk_via_acpi }, { PCI_FIXUP_HEADER, PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686_4, quirk_via_acpi }, diff -Nru a/include/linux/pci_ids.h b/include/linux/pci_ids.h --- a/include/linux/pci_ids.h Sun Jan 11 20:51:06 2004 +++ b/include/linux/pci_ids.h Sun Jan 11 20:51:06 2004 @@ -1901,6 +1901,7 @@ #define PCI_DEVICE_ID_GENROCO_HFP832 0x0003 #define PCI_VENDOR_ID_INTEL 0x8086 +#define PCI_DEVICE_ID_INTEL_EESSC 0x0008 #define PCI_DEVICE_ID_INTEL_21145 0x0039 #define PCI_DEVICE_ID_INTEL_82375 0x0482 #define PCI_DEVICE_ID_INTEL_82424 0x0483 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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