[OpenWrt-Devel] [PATCH 2/5] lantiq/xrx200-net: fix PCE_MAPx handling

Martin Schiller mschiller at tdt.de
Mon Feb 22 07:17:58 EST 2016

On 02/20/2016 at 10:59 AM, Felix Fietkau wrote:
> On 2016-02-18 14:13, Martin Schiller wrote:
> > Remove unnecessary MPMAP (PCE_MAP1) initialization and make
> > and UUCMAP (PCE_MAP3) configurable from user space.
> >
> > Signed-off-by: Martin Schiller <mschiller at tdt.de>
> This looks a lot like a low level implementation detail that should not
> be exposed to the configuration. Please provide an explanation of how
> exactly these port map registers works, so we can figure out a way to
> set it dynamically from within the driver.
> - Felix

MPMAP is the map of ports to which incoming frames shall be sent for

There are a lot of other registers where you can configure which kind of
frames shall be monitored. So adding ports to the MPMAP without further
configuration doesn't make sense, and so the MPMAP initialization should
be removed.

DMCPMAP is the map of ports to which incoming unknown multicast and
broadcast frames shall be sent.

UUCMAP ist he map of ports to which incoming unknown unicast frames
shall be sent.

 I introduced this configure options, because they were helpful to figure
out the behaivor of this mappings while I was "fighting" with the LAN/WAN port
separation, but there is actually no really strong need to have access to this
registers from userspace.

So my thought was that it won't hurt or break anything else when I add the
opportunity to change this register values from userspace.

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