Commit 716406d9 authored by Zhangfei Gao's avatar Zhangfei Gao Committed by Zheng Zengkai
Browse files

PCI: Set dma-can-stall for HiSilicon chips 

driver inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I472UK?from=project-issue



----------------------------------------------------------------------

HiSilicon KunPeng920 and KunPeng930 have devices appear as PCI but are
actually on the AMBA bus. These fake PCI devices can support SVA via
SMMU stall feature, by setting dma-can-stall for ACPI platforms.

Signed-off-by: default avatarZhangfei Gao <zhangfei.gao@linaro.org>
Signed-off-by: default avatarJean-Philippe Brucker <jean-philippe@linaro.org>
Signed-off-by: default avatarZhou Wang <wangzhou1@hisilicon.com>
Reviewed-by: default avatarHao Fang <fanghao11@huawei.com>
Reviewed-by: default avatarMingqiang Ling <lingmingqiang@huawei.com>
Signed-off-by: default avatarZheng Zengkai <zhengzengkai@huawei.com>
parent f949fb3e

drivers/pci/quirks.c

+13 −0
Original line number Diff line number Diff line
@@ -1827,10 +1827,23 @@ DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_HUAWEI, 0x1610, PCI_CLASS_BRIDGE_PCI 


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->pasid_no_tlp = 1;



	/*

	 * Set the dma-can-stall property on ACPI platforms. Device tree

	 * can set it directly.

	 */

	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);