diff mbox

[v4,5/6] pci: Add DMA alias quirk for mic_x200_dma

Message ID 20160224194423.7585.46582.stgit@bhelgaas-glaptop2.roam.corp.google.com
State Superseded
Headers show

Commit Message

Bjorn Helgaas Feb. 24, 2016, 7:44 p.m. UTC 
From: Jacek Lawrynowicz <jacek.lawrynowicz@intel.com>

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@intel.com>
Acked-by: David Woodhouse <David.Woodhouse@intel.com>
---
 drivers/pci/quirks.c |   13 +++++++++++++
 1 file changed, 13 insertions(+)


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diff mbox

Patch

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index cf023ea..ac23a30 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -3696,6 +3696,19 @@  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_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.
  */