>From 2c4c6ae7e915290f8b432f0fca9c77b03bc63609 Mon Sep 17 00:00:00 2001 From: Jacek Lawrynowicz Date: Thu, 3 Mar 2016 15:53:20 +0100 Subject: [PATCH] PCI: Add DMA alias quirk for mic_x200_dma The MIC x200 NTB forwards DMA transactions upstream using multiple alien RIDs. These RIDs have to be added as aliases to the DMA device to allow buffer access when the IOMMU is enabled. Signed-off-by: Jacek Lawrynowicz Signed-off-by: Bjorn Helgaas Reviewed-by: Alex Williamson Acked-by: David Woodhouse --- drivers/pci/quirks.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index 7559e40..8889ac4 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -3725,6 +3725,21 @@ 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, 0x2260, quirk_mic_x200_dma_alias); +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. */ -- 1.8.3.1