[PATCH] doc: update documentation for ICE DCB and PFC features

[Bruce Richardson]

On Mon, Nov 03, 2025 at 03:50:59PM +0000, Medvedkin, Vladimir wrote:
> Hi Bruce, thanks for reviewing, will send v2 addressing your comments
> 
> On 11/3/2025 3:10 PM, Bruce Richardson wrote:
> > On Mon, Nov 03, 2025 at 03:02:37PM +0000, Vladimir Medvedkin wrote:
> > > Add DCB and PFC documentation. Update feature matrix
> > > and release notes.
> > > 
> > > Signed-off-by: Vladimir Medvedkin <vladimir.medvedkin at intel.com>
> > > ---
> > >   doc/guides/nics/features/ice.ini       |  1 +
> > >   doc/guides/nics/ice.rst                | 74 ++++++++++++++++++++++++++
> > >   doc/guides/rel_notes/release_25_11.rst |  4 ++
> > >   3 files changed, 79 insertions(+)
> > > 
> > I should have noticed that this was all missing from the original patchset
> > and flagged it before merge! Sorry.
> > 
> > Anyway, thanks for doing this now - better late than never, as the saying
> > goes! Review comments inline below.
> > 
> > Thanks,
> > /Bruce
> > 
> <snip>
> > > +
> > > +PFC operates in VLAN-based mode and requires DCB to be configured first.
> > > +
> > So this means you need to call APIs in a specific order?
> 
> Yes, first we need to enable DCB with rte_eth_dev_configure(), then PFC can
> be configured on each individual TC. Generally speaking, PFC is a part of
> DCB standard so it should be obvious to configure DCB first.
> 

I wouldn't assume its obvious. Maybe have a combined C-code example in the
docs for configuring both.

/Bruce