On Fri, Sep 4, 2009 at 9:55 AM, Stefan Assmann<sassmann@xxxxxxxxxx> wrote:
> On some machines with Intel X58 or Intel 55x0 chipset the Intel QuickPath
> Interconnect Routing and Protocol Layer Registers or not exposed to PCI config
> space. Access to these is necessary to disable boot interrupts in the QPI
> Protocol Interrupt Control Register.
> DEVHIDE1 provides a method to (un)hide the PCI config space of devices inside
> the IOH and is altered to guarantee that PCI config space is accessible.
> See Intel document #320838-003, sections 17.6.5.10 and 17.11.2.21.
>
> Signed-off-by: Stefan Assmann <sassmann@xxxxxxxxxx>
> ---
> drivers/pci/quirks.c | 24 ++++++++++++++++++++++++
> include/linux/pci_ids.h | 1 +
> 2 files changed, 25 insertions(+)
>
> --- a/drivers/pci/quirks.c
> +++ b/drivers/pci/quirks.c
> @@ -1612,6 +1612,30 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_IN
> DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB_10, quirk_disable_intel_boot_interrupt);
>
> /*
> + * Show Intel QuickPath Interconnect Routing and Protocol Layer Registers
> + * in PCI config space (ensures access to QPIPINTRC).
> + * See Intel document #320838-003, sections 17.6.5.10 and 17.11.2.21.
> + */
> +#define INTEL_X58_55x0_DEVHIDE1_REG 0xf2
> +#define INTEL_X58_55x0_HIDE_DEV17_FUN0 (1<<12)
> +#define INTEL_X58_55x0_HIDE_DEV17_FUN1 (1<<13)
> +
> +static void quirk_show_intel_qpi_conf_register(struct pci_dev *dev)
> +{
> + u16 pci_config_word;
> +
> + pci_read_config_word(dev, INTEL_X58_55x0_DEVHIDE1_REG, &pci_config_word);
> + pci_config_word &= ~(INTEL_X58_55x0_HIDE_DEV17_FUN0 |
> + INTEL_X58_55x0_HIDE_DEV17_FUN1);
> + pci_write_config_word(dev, INTEL_X58_55x0_DEVHIDE1_REG, pci_config_word);
> +
> + /* need to rescan the bus for changes to take effect */
> + pci_rescan_bus(dev->bus);
better to check if those bits are set already...
can you move the quirk to EARLY to avoid rescan bus?
YH
> +}
> +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG9, quirk_show_intel_qpi_conf_register);
> +DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG9, quirk_show_intel_qpi_conf_register);
> +
> +/*
> * disable boot interrupts on HT-1000
> */
> #define BC_HT1000_FEATURE_REG 0x64
> --- a/include/linux/pci_ids.h
> +++ b/include/linux/pci_ids.h
> @@ -2508,6 +2508,7 @@
> #define PCI_DEVICE_ID_INTEL_IOAT_TBG5 0x342a
> #define PCI_DEVICE_ID_INTEL_IOAT_TBG6 0x342b
> #define PCI_DEVICE_ID_INTEL_IOAT_TBG7 0x342c
> +#define PCI_DEVICE_ID_INTEL_IOAT_TBG9 0x342e
> #define PCI_DEVICE_ID_INTEL_IOAT_TBG0 0x3430
> #define PCI_DEVICE_ID_INTEL_IOAT_TBG1 0x3431
> #define PCI_DEVICE_ID_INTEL_IOAT_TBG2 0x3432
> --
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