| Message ID | 1444409849-5685-3-git-send-email-Liviu.Dudau@arm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Delegated to: | Bjorn Helgaas |
| Headers | show |
On Friday 09 October 2015 17:57:26 Liviu Dudau wrote: > +/* > + * The PLDA's XpressRICH3 doesn't describe itself as a bridge. This is required > + * for correct/normal enumeration. > + */ > +static void xr3pci_quirk_class(struct pci_dev *pdev) > +{ > + pdev->class = PCI_CLASS_BRIDGE_PCI << 8; > +} > +DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_PLDA, PCI_DEVICE_ID_XR3PCI, xr3pci_quirk_class); > Are you sure that this device ID is only used for the host bridge, not for related devices in endpoint mode? While we don't support PCIe endpoint drivers at the moment, it might happen at some point and then things break when someone tries to plug a machine with this ID into a Linux host. Arnd -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Fri, Oct 09, 2015 at 08:32:07PM +0200, Arnd Bergmann wrote: > On Friday 09 October 2015 17:57:26 Liviu Dudau wrote: > > +/* > > + * The PLDA's XpressRICH3 doesn't describe itself as a bridge. This is required > > + * for correct/normal enumeration. > > + */ > > +static void xr3pci_quirk_class(struct pci_dev *pdev) > > +{ > > + pdev->class = PCI_CLASS_BRIDGE_PCI << 8; > > +} > > +DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_PLDA, PCI_DEVICE_ID_XR3PCI, xr3pci_quirk_class); > > > > Are you sure that this device ID is only used for the host bridge, not > for related devices in endpoint mode? I would hope so. The device ID has been assigned to ARM's implementation by PLDA, it would be logical not to be reused for anyone else's. > > While we don't support PCIe endpoint drivers at the moment, it might > happen at some point and then things break when someone tries to > plug a machine with this ID into a Linux host. I'm asking for confirmation inside ARM that the IDs are uniquely allocated to Juno and will come back when I'll get confirmation. Best regards, Liviu > > Arnd >
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index b03373f..ae24bb4 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -4149,3 +4149,13 @@ static void quirk_intel_qat_vf_cap(struct pci_dev *pdev) } } DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x443, quirk_intel_qat_vf_cap); + +/* + * The PLDA's XpressRICH3 doesn't describe itself as a bridge. This is required + * for correct/normal enumeration. + */ +static void xr3pci_quirk_class(struct pci_dev *pdev) +{ + pdev->class = PCI_CLASS_BRIDGE_PCI << 8; +} +DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_PLDA, PCI_DEVICE_ID_XR3PCI, xr3pci_quirk_class);
The XpressRICH3 host bridge at power up has an unassigned class on some of ARM Ltd boards, add a quirk to correct that. Signed-off-by: Liviu Dudau <Liviu.Dudau@arm.com> --- drivers/pci/quirks.c | 10 ++++++++++ 1 file changed, 10 insertions(+)