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    Subject[PATCH 4.19 066/109] PCI: Add ACS quirk for Broadcom BCM57414 NIC
    Date
    From: Sriharsha Basavapatna <sriharsha.basavapatna@broadcom.com>

    commit db2f77e2bd99dbd2fb23ddde58f0fae392fe3338 upstream.

    The Broadcom BCM57414 NIC may be a multi-function device. While it does
    not advertise an ACS capability, peer-to-peer transactions are not possible
    between the individual functions, so it is safe to treat them as fully
    isolated.

    Add an ACS quirk for this device so the functions can be in independent
    IOMMU groups and attached individually to userspace applications using
    VFIO.

    [bhelgaas: commit log]
    Link: https://lore.kernel.org/r/1621645997-16251-1-git-send-email-michael.chan@broadcom.com
    Signed-off-by: Sriharsha Basavapatna <sriharsha.basavapatna@broadcom.com>
    Signed-off-by: Michael Chan <michael.chan@broadcom.com>
    Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
    Cc: stable@vger.kernel.org
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    ---
    drivers/pci/quirks.c | 2 ++
    1 file changed, 2 insertions(+)

    diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
    index 285b361831ec..c5141b0542d1 100644
    --- a/drivers/pci/quirks.c
    +++ b/drivers/pci/quirks.c
    @@ -4711,6 +4711,8 @@ static const struct pci_dev_acs_enabled {
    { PCI_VENDOR_ID_AMPERE, 0xE00A, pci_quirk_xgene_acs },
    { PCI_VENDOR_ID_AMPERE, 0xE00B, pci_quirk_xgene_acs },
    { PCI_VENDOR_ID_AMPERE, 0xE00C, pci_quirk_xgene_acs },
    + /* Broadcom multi-function device */
    + { PCI_VENDOR_ID_BROADCOM, 0x16D7, pci_quirk_mf_endpoint_acs },
    { PCI_VENDOR_ID_BROADCOM, 0xD714, pci_quirk_brcm_acs },
    { 0 }
    };
    --
    2.30.2
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