Hi Vivien
On Wed, Nov 23, 2016 at 10:59:13AM -0500, Vivien Didelot wrote:
> Hi Stefan,
>
> Stefan Eichenberger <stefan.eichenber...@netmodule.com> writes:
>
> >> Now, the different families are not 100% compatible with each
> >> other. We never had access to a 6097, so it has not been tested
> >> recently, and we have probably broken it... My guess would be,
> >> anywhere mv88e6xxx_6095_family(chip) is used, there also needs to be
> >> an mv88e6xxx_6097_family(chip). But i could be wrong.
> >
> > I think I probably found the problem. For EDSA type switches the bit
> > PORT_CONTROL_FORWARD_UNKNOWN_MC is set on the cpu port but not for DSA
> > type switches. Broadcast addresses are threaded as multicast addresses,
> > so unknown frames will never leave the switch.
>
> The Port Control Register (0x04) is one of these registers which changes
> almost completely among chip models.
>
> Are you able to give us the layout of the port register 0x04 on your
> 88E6097? I don't have access to its datasheet.
Yes sure, the layout of the Port Control Register for the 88E6097 is the same
as for the 88E6352:
15:14: SA Filtering: 00 -> SA filtering disabled
01 -> Drop on lock
10 -> Drop on Unlock
11 -> Drop to CPU
13:12: Egress Mode: 00 -> default unmodified mode
01 -> default to transmit all frames untagged
10 -> default to transmit all frames tagged
11 -> reserved for future use
11: Header: Ingress&Egress header mode (PORT_CONTROL_HEADER)
10: IGMP Snoop: IGMP/MLD Snooping (PORT_CONTROL_IGMP_MLD_SNOOP)
9:8 Frame Mode: 00 -> Normal Network
01 -> DSA (FRAME_MODE_DSA)
10 -> Provider (FRAME_MODE_PROVIDER)
11 -> Ether Type DSA (FRAME_ETHER_TYPE_DSA)
7: VLAN Tunnel: VLAN Tunnel (VLAN_TUNNEL)
6: TagIfBoth: Use tag info for QPri
5:4: InitialPri: 00 -> Use Port defaults for FPri and QPri
01 -> Use Tag Priority
10 -> Use IP Priority
11 -> Use Tag & IP Priority
3:2: Egress Floods:00 -> Do not egress any frame with unknown DA
01 -> Do not egress any frame with an unknown mc DA
10 -> Do not egress any frame with an unknown DA
11 -> Egress all frames with an unknown DA
Broadcasts are threaded as multicast if FloodBC in
global2 register is not set.
1:0: PortState: 00 -> Disabled
01 -> Blocking/Listening
10 -> Learning
11 -> Forwarding
I hope this helps, feel free to ask for more infos.
>
> For instance on 88E6185 bit 3 is reserved, on 88E6352 and 88E6390 bit
> 3:2 are "Egress Floods" and 0x2 means "Do not egress any frame with an
> unknown unicast DA".
>
> > Do you know if there is a reason why this bit isn't set for DSA type
> > switches too? The patch would be extremely simple and it seems to work
> > perfectly with this bit set on the CPU port.
>
> All these family checks for bit masking are quite messy and ideally need
> proper abstraction...
>
> Can you give us the chunk of patch you are refering to?
I will send the patch in a few minutes.
Regards,
Stefan
