PCI: Add ACS quirk for Broadcom BCM5750x NICs

[ Upstream commit afd306a65cedb9589564bdb23a0c368abc4215fd ]

The Broadcom BCM5750x NICs may be multi-function devices.  They do not
advertise 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 these devices so the functions can be in independent
IOMMU groups and attached individually to userspace applications using
VFIO.

Link: https://lore.kernel.org/r/1654796507-28610-1-git-send-email-michael.chan@broadcom.com
Signed-off-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 1be2894ada70c29ea2028ea2a1f5af13a0241186..fb2e52fd01b3979ea63fcbd502ee1ed6b8e3ac82 100644 (file)
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -4897,6 +4897,9 @@ static const struct pci_dev_acs_enabled {
        { 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, 0x1750, pci_quirk_mf_endpoint_acs },
+       { PCI_VENDOR_ID_BROADCOM, 0x1751, pci_quirk_mf_endpoint_acs },
+       { PCI_VENDOR_ID_BROADCOM, 0x1752, 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 },