diff options
| author | Mengyuan Lou <mengyuanlou@net-swift.com> | 2023-02-07 11:24:19 +0100 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2023-02-14 01:05:59 +0100 |
| commit | a2b9b123ccac913e9f9b80337d687a2fe786a634 (patch) | |
| tree | 63b687d62d8698792cf5787a230056e6ae1e714b /drivers/pci | |
| parent | PCI: Avoid FLR for AMD FCH AHCI adapters (diff) | |
| download | linux-a2b9b123ccac913e9f9b80337d687a2fe786a634.tar.xz linux-a2b9b123ccac913e9f9b80337d687a2fe786a634.zip | |
PCI: Add ACS quirk for Wangxun NICs
Wangxun has verified there is no peer-to-peer between functions for the
below selection of SFxxx, RP1000 and RP2000 NICS. They may be
multi-function devices, but the hardware does not advertise ACS capability.
Add an ACS quirk for these devices so the functions can be in independent
IOMMU groups.
Link: https://lore.kernel.org/r/20230207102419.44326-1-mengyuanlou@net-swift.com
Signed-off-by: Mengyuan Lou <mengyuanlou@net-swift.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/quirks.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index 20ac67d59034..494fa46f5767 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -4835,6 +4835,26 @@ 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, and on multi-function + * devices, peer-to-peer transactions are not be used between the functions. + * So add an ACS quirk for below devices to isolate functions. + * SFxxx 1G NICs(em). + * RP1000/RP2000 10G NICs(sp). + */ +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 +5000,8 @@ 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 } }; |