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authorYangbo Lu <yangbo.lu@nxp.com>2019-11-20 11:23:18 +0300
committerDavid S. Miller <davem@davemloft.net>2019-11-22 01:39:02 +0300
commitc0bcf537667cf88bbcbb377d01d2b79c45265741 (patch)
tree067419f4e20b69564b1ad6241da392a77793742f /net/dsa
parent5df66c48bc4e4019f92a8c62d0b74a97d102ba8d (diff)
downloadlinux-c0bcf537667cf88bbcbb377d01d2b79c45265741.tar.xz
net: dsa: ocelot: add hardware timestamping support for Felix
This patch is to reuse ocelot functions as possible to enable PTP clock and to support hardware timestamping on Felix. On TX path, timestamping works on packet which requires timestamp. The injection header will be configured accordingly, and skb clone requires timestamp will be added into a list. The TX timestamp is final handled in threaded interrupt handler when PTP timestamp FIFO is ready. On RX path, timestamping is always working. The RX timestamp could be got from extraction header. Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/dsa')
-rw-r--r--net/dsa/tag_ocelot.c14
1 files changed, 13 insertions, 1 deletions
diff --git a/net/dsa/tag_ocelot.c b/net/dsa/tag_ocelot.c
index 078d4790669d..8e3e7283d430 100644
--- a/net/dsa/tag_ocelot.c
+++ b/net/dsa/tag_ocelot.c
@@ -137,9 +137,11 @@ static struct sk_buff *ocelot_xmit(struct sk_buff *skb,
struct net_device *netdev)
{
struct dsa_port *dp = dsa_slave_to_port(netdev);
- u64 bypass, dest, src, qos_class;
+ u64 bypass, dest, src, qos_class, rew_op;
struct dsa_switch *ds = dp->ds;
int port = dp->index;
+ struct ocelot *ocelot = ds->priv;
+ struct ocelot_port *ocelot_port = ocelot->ports[port];
u8 *injection;
if (unlikely(skb_cow_head(skb, OCELOT_TAG_LEN) < 0)) {
@@ -161,6 +163,16 @@ static struct sk_buff *ocelot_xmit(struct sk_buff *skb,
packing(injection, &src, 46, 43, OCELOT_TAG_LEN, PACK, 0);
packing(injection, &qos_class, 19, 17, OCELOT_TAG_LEN, PACK, 0);
+ if (ocelot->ptp && (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP)) {
+ rew_op = ocelot_port->ptp_cmd;
+ if (ocelot_port->ptp_cmd == IFH_REW_OP_TWO_STEP_PTP) {
+ rew_op |= (ocelot_port->ts_id % 4) << 3;
+ ocelot_port->ts_id++;
+ }
+
+ packing(injection, &rew_op, 125, 117, OCELOT_TAG_LEN, PACK, 0);
+ }
+
return skb;
}