xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

net: dsa: sja1105: implement the port MTU callbacks

Browse Source 
On this switch, the frame length enforcements are performed by the
ingress policers. There are 2 types of those: regular L2 (also called
best-effort) and Virtual Link policers (an ARINC664/AFDX concept for
defining L2 streams with certain QoS abilities). To avoid future
confusion, I prefer to call the reset reason "Best-effort policers",
even though the VL policers are not yet supported.

We also need to change the setup of the initial static config, such that
DSA calls to .change_mtu (which are expensive) become no-ops and don't
reset the switch 5 times.

A driver-level decision is to unconditionally allow single VLAN-tagged
traffic on all ports. The CPU port must accept an additional VLAN header
for the DSA tag, which is again a driver-level decision.

The policers actually count bytes not only from the SDU, but also from
the Ethernet header and FCS, so those need to be accounted for as well.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vladimir Oltean
2020-03-27 21:55:45 +02:00
committed by David S. Miller
parent 6ae5834b98
commit c279c7261a
2 changed files with 47 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/net/dsa/sja1105/sja1105.h
View File

@@ -126,6 +126,7 @@ enum sja1105_reset_reason {
SJA1105_RX_HWTSTAMPING,
SJA1105_AGEING_TIME,
SJA1105_SCHEDULING,
SJA1105_BEST_EFFORT_POLICING,
};
int sja1105_static_config_reload(struct sja1105_private *priv,