PCI: Add ACS quirk for Broadcom BCM57414 NIC

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

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 877ce61..22b2bb1 100644 (file)
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -4840,6 +4840,8 @@ 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 },
        /* Amazon Annapurna Labs */
        { PCI_VENDOR_ID_AMAZON_ANNAPURNA_LABS, 0x0031, pci_quirk_al_acs },