HiSilicon KunPeng920 and KunPeng930 have devices appear as PCI but are actually on the AMBA bus. These fake PCI devices can not support tlp and have to enable SMMU stall mode to use the SVA feature.
Add a quirk to set dma-can-stall property and enable tlp for these devices. Signed-off-by: Zhangfei Gao <[email protected]> Signed-off-by: Jean-Philippe Brucker <[email protected]> Signed-off-by: Zhou Wang <[email protected]> --- Property dma-can-stall depends on patchset https://lore.kernel.org/linux-iommu/[email protected]/ drivers/pci/quirks.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index 653660e..a27f327 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -1825,6 +1825,31 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7525_MCH, quir DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_HUAWEI, 0x1610, PCI_CLASS_BRIDGE_PCI, 8, quirk_pcie_mch); +static void quirk_huawei_pcie_sva(struct pci_dev *pdev) +{ + struct property_entry properties[] = { + PROPERTY_ENTRY_BOOL("dma-can-stall"), + {}, + }; + + if ((pdev->revision != 0x21) && (pdev->revision != 0x30)) + return; + + pdev->eetlp_prefix_path = 1; + + /* Device-tree can set the stall property */ + if (!pdev->dev.of_node && + device_add_properties(&pdev->dev, properties)) + pci_warn(pdev, "could not add stall property"); +} + +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_HUAWEI, 0xa250, quirk_huawei_pcie_sva); +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_HUAWEI, 0xa251, quirk_huawei_pcie_sva); +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_HUAWEI, 0xa255, quirk_huawei_pcie_sva); +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_HUAWEI, 0xa256, quirk_huawei_pcie_sva); +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_HUAWEI, 0xa258, quirk_huawei_pcie_sva); +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_HUAWEI, 0xa259, quirk_huawei_pcie_sva); + /* * It's possible for the MSI to get corrupted if SHPC and ACPI are used * together on certain PXH-based systems. -- 2.7.4
