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authorVladimir Oltean <olteanv@gmail.com>2019-06-08 15:04:42 +0300
committerDavid S. Miller <davem@davemloft.net>2019-06-09 01:20:40 +0300
commitf3097be21bf17ae8785eea009cbc424f16611d9a (patch)
treee21fd387d3a4914c2bf7b0322aaedb0d5172b23c /include/linux/dsa/sja1105.h
parent08fde09a0d1fd1391bdf828de3607c00193e6528 (diff)
downloadlinux-f3097be21bf17ae8785eea009cbc424f16611d9a.tar.xz
net: dsa: sja1105: Add a state machine for RX timestamping
Meta frame reception relies on the hardware keeping its promise that it will send no other traffic towards the CPU port between a link-local frame and a meta frame. Otherwise there is no other way to associate the meta frame with the link-local frame it's holding a timestamp of. The receive function is made stateful, and buffers a timestampable frame until its meta frame arrives, then merges the two, drops the meta and releases the link-local frame up the stack. Signed-off-by: Vladimir Oltean <olteanv@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/dsa/sja1105.h')
-rw-r--r--include/linux/dsa/sja1105.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/dsa/sja1105.h b/include/linux/dsa/sja1105.h
index 2c4fce4eaf0d..79435cfc20eb 100644
--- a/include/linux/dsa/sja1105.h
+++ b/include/linux/dsa/sja1105.h
@@ -45,6 +45,13 @@ struct sja1105_tagger_data {
bool hwts_rx_en;
};
+struct sja1105_skb_cb {
+ u32 meta_tstamp;
+};
+
+#define SJA1105_SKB_CB(skb) \
+ ((struct sja1105_skb_cb *)DSA_SKB_CB_PRIV(skb))
+
struct sja1105_port {
struct sja1105_tagger_data *data;
struct dsa_port *dp;