On Thu, 3 Mar 2016 15:53:20 +0100
Jacek Lawrynowicz <jacek.lawrynow...@intel.com> wrote:
> MIC x200 NTB forwards PCIe traffic using multiple alien RID. They have to
> be added as aliases to the DMA device in order to allow buffer access
> when IOMMU is enabled.
>
> Signed-off-by: Jacek Lawrynowicz <jacek.lawrynow...@intel.com>
> Acked-by: David Woodhouse <david.woodho...@intel.com>
> ---
Reviewed-by: Alex Williamson <alex.william...@redhat.com>
> Updated quirk comment with requirement that aliases have to be matching
> values programmed in the EEPROM. The LUT table on x200 is static so there
> is no need to program it from the driver.
>
> drivers/pci/quirks.c | 14 ++++++++++++++
> 1 file changed, 14 insertions(+)
>
> diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
> index 51927a5..e66f09d 100644
> --- a/drivers/pci/quirks.c
> +++ b/drivers/pci/quirks.c
> @@ -3696,6 +3696,20 @@ DECLARE_PCI_FIXUP_HEADER(0x1283, 0x8892,
> quirk_use_pcie_bridge_dma_alias);
> DECLARE_PCI_FIXUP_HEADER(0x8086, 0x244e, quirk_use_pcie_bridge_dma_alias);
>
> /*
> + * MIC x200 NTB forwards PCIe traffic using multiple alien RIDs. They have to
> + * be added as aliases to the DMA device in order to allow buffer access
> + * when IOMMU is enabled. Following devfns have to match RIT-LUT table
> + * programmed in the EEPROM.
> + */
> +static void quirk_mic_x200_dma_alias(struct pci_dev *pdev)
> +{
> + pci_add_dma_alias(pdev, PCI_DEVFN(0x10, 0x0));
> + pci_add_dma_alias(pdev, PCI_DEVFN(0x11, 0x0));
> + pci_add_dma_alias(pdev, PCI_DEVFN(0x12, 0x3));
> +}
> +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2264,
> quirk_mic_x200_dma_alias);
> +
> +/*
> * Intersil/Techwell TW686[4589]-based video capture cards have an empty
> (zero)
> * class code. Fix it.
> */
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