The 08/13/2019 10:52, Yangbo Lu wrote:
> All the PTP messages over Ethernet have etype 0x88f7 on them.
> Use etype as the key to trap PTP messages.
>
> Signed-off-by: Yangbo Lu <yangbo...@nxp.com>
> ---
> Changes for v2:
> - Added this patch.
> ---
> drivers/net/ethernet/mscc/ocelot.c | 28 ++++++++++++++++++++++++++++
> 1 file changed, 28 insertions(+)
>
> diff --git a/drivers/net/ethernet/mscc/ocelot.c
> b/drivers/net/ethernet/mscc/ocelot.c
> index 6932e61..40f4e0d 100644
> --- a/drivers/net/ethernet/mscc/ocelot.c
> +++ b/drivers/net/ethernet/mscc/ocelot.c
> @@ -1681,6 +1681,33 @@ int ocelot_probe_port(struct ocelot *ocelot, u8 port,
> }
> EXPORT_SYMBOL(ocelot_probe_port);
>
> +static int ocelot_ace_add_ptp_rule(struct ocelot *ocelot)
> +{
> + struct ocelot_ace_rule *rule;
> +
> + rule = kzalloc(sizeof(*rule), GFP_KERNEL);
> + if (!rule)
> + return -ENOMEM;
> +
> + /* Entry for PTP over Ethernet (etype 0x88f7)
> + * Action: trap to CPU port
> + */
> + rule->ocelot = ocelot;
> + rule->prio = 1;
> + rule->type = OCELOT_ACE_TYPE_ETYPE;
> + /* Available on all ingress port except CPU port */
> + rule->ingress_port = ~BIT(ocelot->num_phys_ports);
> + rule->dmac_mc = OCELOT_VCAP_BIT_1;
> + rule->frame.etype.etype.value[0] = 0x88;
> + rule->frame.etype.etype.value[1] = 0xf7;
> + rule->frame.etype.etype.mask[0] = 0xff;
> + rule->frame.etype.etype.mask[1] = 0xff;
> + rule->action = OCELOT_ACL_ACTION_TRAP;
> +
> + ocelot_ace_rule_offload_add(rule);
> + return 0;
> +}
> +
> int ocelot_init(struct ocelot *ocelot)
> {
> u32 port;
> @@ -1708,6 +1735,7 @@ int ocelot_init(struct ocelot *ocelot)
> ocelot_mact_init(ocelot);
> ocelot_vlan_init(ocelot);
> ocelot_ace_init(ocelot);
> + ocelot_ace_add_ptp_rule(ocelot);
>
> for (port = 0; port < ocelot->num_phys_ports; port++) {
> /* Clear all counters (5 groups) */
This seems really wrong to me, and much too hard-coded...
What if I want to forward the PTP frames to be forwarded like a normal non-aware
PTP switch?
What if do not want this on all ports?
If you do not have an application behind this implementing a boundary or
transparent clock, then you are breaking PTP on the network.
/Allan
