On Sat, Nov 20, 2021 at 03:17:02PM -0800, David E. Box wrote: > Add #defines for accessing Vendor ID, Revision, Length, and ID offsets > in the Designated Vendor Specific Extended Capability (DVSEC). Defined > in PCIe r5.0, sec 7.9.6. > > Signed-off-by: David E. Box <david.e.box@xxxxxxxxxxxxxxx> > Acked-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx> > Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx> > --- > include/uapi/linux/pci_regs.h | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/include/uapi/linux/pci_regs.h b/include/uapi/linux/pci_regs.h > index ff6ccbc6efe9..318f3f1f9e92 100644 > --- a/include/uapi/linux/pci_regs.h > +++ b/include/uapi/linux/pci_regs.h > @@ -1086,7 +1086,11 @@ > > /* Designated Vendor-Specific (DVSEC, PCI_EXT_CAP_ID_DVSEC) */ > #define PCI_DVSEC_HEADER1 0x4 /* Designated Vendor-Specific Header1 */ > +#define PCI_DVSEC_HEADER1_VID(x) ((x) & 0xffff) > +#define PCI_DVSEC_HEADER1_REV(x) (((x) >> 16) & 0xf) > +#define PCI_DVSEC_HEADER1_LEN(x) (((x) >> 20) & 0xfff) > #define PCI_DVSEC_HEADER2 0x8 /* Designated Vendor-Specific Header2 */ > +#define PCI_DVSEC_HEADER2_ID(x) ((x) & 0xffff) Why does userspace need to have these defines? What userspace tool is going to use these? thanks, greg k-h
