diff options
| author | Mengyuan Lou <mengyuanlou@net-swift.com> | 2024-11-15 05:46:04 +0300 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2024-11-16 02:30:15 +0300 |
| commit | aa46a3736afcb7b0793766d22479b8b99fc1b322 (patch) | |
| tree | df72f8042df89168c54bb3e8e5965a7ce5a0f0a6 /drivers/pci/quirks.c | |
| parent | 9852d85ec9d492ebef56dc5f229416c925758edc (diff) | |
| download | linux-aa46a3736afcb7b0793766d22479b8b99fc1b322.tar.xz | |
PCI: Add ACS quirk for Wangxun FF5xxx NICs
Wangxun FF5xxx NICs are similar to SFxxx, RP1000 and RP2000 NICs. They may
be multi-function devices, but they do not advertise an ACS capability.
But the hardware does isolate FF5xxx functions as though it had an ACS
capability and PCI_ACS_RR and PCI_ACS_CR were set in the ACS Control
register, i.e., all peer-to-peer traffic is directed upstream instead of
being routed internally.
Add ACS quirk for FF5xxx NICs in pci_quirk_wangxun_nic_acs() so the
functions can be in independent IOMMU groups.
Link: https://lore.kernel.org/r/E16053DB2B80E9A5+20241115024604.30493-1-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/quirks.c')
| -rw-r--r-- | drivers/pci/quirks.c | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index dccb60c1d9cc..8103bc24a54e 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -4996,18 +4996,21 @@ static int pci_quirk_brcm_acs(struct pci_dev *dev, u16 acs_flags) } /* - * 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. + * Wangxun 40G/25G/10G/1G NICs have no ACS capability, but on + * multi-function devices, the hardware isolates the functions by + * directing all peer-to-peer traffic upstream as though PCI_ACS_RR and + * PCI_ACS_CR were set. * SFxxx 1G NICs(em). * RP1000/RP2000 10G NICs(sp). + * FF5xxx 40G/25G/10G NICs(aml). */ static int pci_quirk_wangxun_nic_acs(struct pci_dev *dev, u16 acs_flags) { switch (dev->device) { - case 0x0100 ... 0x010F: - case 0x1001: - case 0x2001: + case 0x0100 ... 0x010F: /* EM */ + case 0x1001: case 0x2001: /* SP */ + case 0x5010: case 0x5025: case 0x5040: /* AML */ + case 0x5110: case 0x5125: case 0x5140: /* AML */ return pci_acs_ctrl_enabled(acs_flags, PCI_ACS_SV | PCI_ACS_RR | PCI_ACS_CR | PCI_ACS_UF); } |