PCI: Add ACS quirk for Broadcom BCM57414 NIC

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>

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index de7d65971d7f0d8ca4cc4c451e90422827522523..3602e967e96a1c994705bd4870977e5976025d6a 100644 (file)
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -4684,6 +4684,8 @@ 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 }
 };