The Wangxun 1G/10G NICs may be multi-function devices. They do
not advertise ACS capability.
Add an ACS quirk for these devices so the functions can be in
independent IOMMU groups.
Signed-off-by: Mengyuan Lou <mengyuanlou@xxxxxxxxxxxxx>
---
drivers/pci/quirks.c | 20 ++++++++++++++++++++
include/linux/pci_ids.h | 2 ++
2 files changed, 22 insertions(+)
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 285acc4aaccc..9daa4a07c67d 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -4835,6 +4835,24 @@ static int pci_quirk_brcm_acs(struct pci_dev *dev, u16 acs_flags)
PCI_ACS_SV | PCI_ACS_RR | PCI_ACS_CR | PCI_ACS_UF);
}
+/*
+ * Wangxun 10G/1G nics have no ACS capability.
+ * But the implementation could block peer-to-peer transactions between them
+ * and provide ACS-like functionality.
+ */
+static int pci_quirk_wangxun_nic_acs(struct pci_dev *dev, u16 acs_flags)
+{
+ switch (dev->device) {
+ case 0x0100 ... 0x010F:
+ case 0x1001:
+ case 0x2001:
+ return pci_acs_ctrl_enabled(acs_flags,
+ PCI_ACS_SV | PCI_ACS_RR | PCI_ACS_CR | PCI_ACS_UF);
+ }
+
+ return false;
+}
+
static const struct pci_dev_acs_enabled {
u16 vendor;
u16 device;
@@ -4980,6 +4998,8 @@ static const struct pci_dev_acs_enabled {
{ PCI_VENDOR_ID_NXP, 0x8d9b, pci_quirk_nxp_rp_acs },
/* Zhaoxin Root/Downstream Ports */
{ PCI_VENDOR_ID_ZHAOXIN, PCI_ANY_ID, pci_quirk_zhaoxin_pcie_ports_acs },
+ /* Wangxun nics */
+ { PCI_VENDOR_ID_WANGXUN, PCI_ANY_ID, pci_quirk_wangxun_nic_acs },
{ 0 }
};
diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h
index b362d90eb9b0..bc8f484cdcf3 100644
--- a/include/linux/pci_ids.h
+++ b/include/linux/pci_ids.h
@@ -3012,6 +3012,8 @@
#define PCI_DEVICE_ID_INTEL_VMD_9A0B 0x9a0b
#define PCI_DEVICE_ID_INTEL_S21152BB 0xb152
+#define PCI_VENDOR_ID_WANGXUN 0x8088
+
#define PCI_VENDOR_ID_SCALEMP 0x8686
#define PCI_DEVICE_ID_SCALEMP_VSMP_CTL 0x1010
--
2.39.1
