linux-kernel - Re: [PATCH V3 1/3] PCI: Add defines for Designated Vendor-Specific Capability

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Message-ID: <20200716150706.GA628795@bjorn-Precision-5520>
Date:   Thu, 16 Jul 2020 10:07:06 -0500
From:   Bjorn Helgaas <helgaas@...nel.org>
To:     Randy Dunlap <rdunlap@...radead.org>
Cc:     "David E. Box" <david.e.box@...ux.intel.com>, lee.jones@...aro.org,
        dvhart@...radead.org, andy@...radead.org, bhelgaas@...gle.com,
        alexander.h.duyck@...ux.intel.com, linux-kernel@...r.kernel.org,
        platform-driver-x86@...r.kernel.org, linux-pci@...r.kernel.org
Subject: Re: [PATCH V3 1/3] PCI: Add defines for Designated Vendor-Specific
 Capability

On Wed, Jul 15, 2020 at 07:55:11PM -0700, Randy Dunlap wrote:
> On 7/13/20 11:23 PM, David E. Box wrote:
> > Add PCIe DVSEC extended capability ID and defines for the header offsets.
> > Defined in PCIe r5.0, sec 7.9.6.
> > 
> > Signed-off-by: David E. Box <david.e.box@...ux.intel.com>
> > Acked-by: Bjorn Helgaas <bhelgaas@...gle.com>
> > ---
> >  include/uapi/linux/pci_regs.h | 5 +++++
> >  1 file changed, 5 insertions(+)
> > 
> > diff --git a/include/uapi/linux/pci_regs.h b/include/uapi/linux/pci_regs.h
> > index f9701410d3b5..09daa9f07b6b 100644
> > --- a/include/uapi/linux/pci_regs.h
> > +++ b/include/uapi/linux/pci_regs.h
> > @@ -720,6 +720,7 @@
> > +#define PCI_EXT_CAP_ID_DVSEC	0x23	/* Designated Vendor-Specific */
> > @@ -1062,6 +1063,10 @@
> > +/* Designated Vendor-Specific (DVSEC, PCI_EXT_CAP_ID_DVSEC) */
> > +#define PCI_DVSEC_HEADER1		0x4 /* Vendor-Specific Header1 */
> > +#define PCI_DVSEC_HEADER2		0x8 /* Vendor-Specific Header2 */
> 
> Just a little comment: It would make more sense to me to
> s/DVSEC/DVSPEC/g.

Yeah, that is confusing, but "DVSEC" is the term used in the spec.  I
think it stands for "Designated Vendor-Specific Extended Capability".