PEAK-System's CAN FD interfaces based on an IP core provide a timestamp for
each CAN and STATUS message received. This patch transfers these received
timestamps (clocked in microseconds) to hardware timestamps (clocked in
nanoseconds) in the corresponding skbs raised to the network layer.
Signed-off-by: Stephane Grosjean <s.grosjean@xxxxxxxxxxxxxxx>
---
drivers/net/can/peak_canfd/peak_canfd.c | 15 +++++++++++++--
1 file changed, 13 insertions(+), 2 deletions(-)
diff --git a/drivers/net/can/peak_canfd/peak_canfd.c b/drivers/net/can/peak_canfd/peak_canfd.c
index 6b0c6a99fc8d..f0b276ed64e4 100644
--- a/drivers/net/can/peak_canfd/peak_canfd.c
+++ b/drivers/net/can/peak_canfd/peak_canfd.c
@@ -232,6 +232,17 @@ static int pucan_setup_rx_barrier(struct peak_canfd_priv *priv)
return pucan_write_cmd(priv);
}
+static int pucan_netif_rx(struct sk_buff *skb, __le32 ts_low, __le32 ts_high)
+{
+ struct skb_shared_hwtstamps *hwts = skb_hwtstamps(skb);
+ u64 ts_us = ((u64)(le32_to_cpu(ts_high)) << 32) + le32_to_cpu(ts_low);
+
+ /* IP core timestamps are µs. */
+ hwts->hwtstamp = ns_to_ktime(ts_us * NSEC_PER_USEC);
+
+ return netif_rx(skb);
+}
+
/* handle the reception of one CAN frame */
static int pucan_handle_can_rx(struct peak_canfd_priv *priv,
struct pucan_rx_msg *msg)
@@ -299,7 +310,7 @@ static int pucan_handle_can_rx(struct peak_canfd_priv *priv,
stats->rx_bytes += cf->len;
stats->rx_packets++;
- netif_rx(skb);
+ pucan_netif_rx(skb, msg->ts_low, msg->ts_high);
return 0;
}
@@ -393,7 +404,7 @@ static int pucan_handle_status(struct peak_canfd_priv *priv,
stats->rx_packets++;
stats->rx_bytes += cf->can_dlc;
- netif_rx(skb);
+ pucan_netif_rx(skb, msg->ts_low, msg->ts_high);
return 0;
}
--
2.20.1
