Commit afd306a6 authored by Pavan Chebbi's avatar Pavan Chebbi Committed by Bjorn Helgaas
Browse files

PCI: Add ACS quirk for Broadcom BCM5750x NICs 

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: default avatarPavan Chebbi <pavan.chebbi@broadcom.com>
Signed-off-by: default avatarMichael Chan <michael.chan@broadcom.com>
Signed-off-by: default avatarBjorn Helgaas <bhelgaas@google.com>
parent f2906aa8

drivers/pci/quirks.c

+3 −0
Original line number Diff line number Diff line
@@ -4924,6 +4924,9 @@ 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 },