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From 67ca04147efac6cac3f7490c61c817a84daada57 Mon Sep 17 00:00:00 2001
From: Yangbo Lu <yangbo.lu@nxp.com>
Date: Thu, 28 Nov 2019 14:42:44 +0800
Subject: [PATCH] LF-368 net: mscc: ocelot: add VCAP IS2 rule to trap PTP
Ethernet frames
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.lu@nxp.com>
---
drivers/net/ethernet/mscc/ocelot.c | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)
--- a/drivers/net/ethernet/mscc/ocelot.c
+++ b/drivers/net/ethernet/mscc/ocelot.c
@@ -2340,6 +2340,20 @@ void ocelot_set_cpu_port(struct ocelot *
}
EXPORT_SYMBOL(ocelot_set_cpu_port);
+/* Entry for PTP over Ethernet (etype 0x88f7)
+ * Action: trap to CPU port
+ */
+static struct ocelot_ace_rule ptp_rule = {
+ .prio = 1,
+ .type = OCELOT_ACE_TYPE_ETYPE,
+ .dmac_mc = OCELOT_VCAP_BIT_1,
+ .action = OCELOT_ACL_ACTION_TRAP,
+ .frame.etype.etype.value[0] = 0x88,
+ .frame.etype.etype.value[1] = 0xf7,
+ .frame.etype.etype.mask[0] = 0xff,
+ .frame.etype.etype.mask[1] = 0xff,
+};
+
int ocelot_init(struct ocelot *ocelot)
{
char queue_name[32];
@@ -2477,6 +2491,13 @@ int ocelot_init(struct ocelot *ocelot)
"Timestamp initialization failed\n");
return ret;
}
+
+ /* Available on all ingress port except CPU port */
+ ptp_rule.ocelot = ocelot;
+ ptp_rule.ingress_port_mask =
+ GENMASK(ocelot->num_phys_ports - 1, 0);
+ ptp_rule.ingress_port_mask &= ~BIT(ocelot->cpu);
+ ocelot_ace_rule_offload_add(&ptp_rule);
}
return 0;
@@ -2491,6 +2512,8 @@ void ocelot_deinit(struct ocelot *ocelot
cancel_delayed_work(&ocelot->stats_work);
destroy_workqueue(ocelot->stats_queue);
mutex_destroy(&ocelot->stats_lock);
+ if (ocelot->ptp)
+ ocelot_ace_rule_offload_del(&ptp_rule);
ocelot_ace_deinit();
if (ocelot->ptp_clock)
ptp_clock_unregister(ocelot->ptp_clock);
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