linux-kernel - [PATCH] pci: Add ACS quirk for Broadcom BCM5760X NIC

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Date: Fri, 10 May 2024 13:42:28 -0700
From: Ajit Khaparde <ajit.khaparde@...adcom.com>
To: bhelgaas@...gle.com,
	linux-pci@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org
Cc: andrew.gospodarek@...adcom.com,
	michael.chan@...adcom.com,
	kuba@...nel.org,
	davem@...emloft.net,
	Andy Gospodarek <gospo@...adcom.com>
Subject: [PATCH] pci: Add ACS quirk for Broadcom BCM5760X NIC

The Broadcom BCM5760X 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 ok 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.

Signed-off-by: Ajit Khaparde <ajit.khaparde@...adcom.com>
Reviewed-by: Andy Gospodarek <gospo@...adcom.com>
---
 drivers/pci/quirks.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index eff7f5df08e2..3d8aa3f709e2 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -5099,6 +5099,10 @@ static const struct pci_dev_acs_enabled {
 	{ 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, 0x1760, pci_quirk_mf_endpoint_acs },
+	{ PCI_VENDOR_ID_BROADCOM, 0x1761, pci_quirk_mf_endpoint_acs },
+	{ PCI_VENDOR_ID_BROADCOM, 0x1762, pci_quirk_mf_endpoint_acs },
+	{ PCI_VENDOR_ID_BROADCOM, 0x1763, 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 },
-- 
2.39.2 (Apple Git-143)


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