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.lawrynowicz@xxxxxxxxx>
Acked-By: David Woodhouse <David.Woodhouse@xxxxxxxxx>
---
drivers/pci/quirks.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 83c3da1..350eac3 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -3702,6 +3702,19 @@ 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 RID. They have to
+ * be added as aliases to the DMA device in order to allow buffer access
+ * when IOMMU is enabled.
+ */
+static void quirk_mic_x200_dma_alias(struct pci_dev *pdev)
+{
+ pci_enable_dma_alias(pdev, PCI_DEVFN(0x10, 0x0));
+ pci_enable_dma_alias(pdev, PCI_DEVFN(0x11, 0x0));
+ pci_enable_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.
*/
--
2.1.4
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