@@ -2066,6 +2066,27 @@ extern void dev_kfree_skb_any(struct sk_buff *skb);
#define HAVE_NETIF_RX 1
extern int netif_rx(struct sk_buff *skb);
extern int netif_rx_ni(struct sk_buff *skb);
+
+/**
+ * netif_rx_defer() - post buffer to the network code
+ * @skb: buffer to post
+ *
+ * This function receives a packet from a device driver and queues it
+ * for the upper (protocol) levels to process. All non-NAPI Ethernet
+ * MAC drivers should use this instead of netif_rx() since this method
+ * allows hardware timestamping to occur within the PHY.
+ *
+ * return values:
+ * NET_RX_SUCCESS (no congestion)
+ * NET_RX_DROP (packet was dropped)
+ */
+static inline int netif_rx_defer(struct sk_buff *skb)
+{
+ if (skb_defer_rx_timestamp(skb))
+ return NET_RX_SUCCESS;
+ return netif_rx(skb);
+}
+
#define HAVE_NETIF_RECEIVE_SKB 1
extern int netif_receive_skb(struct sk_buff *skb);
extern gro_result_t dev_gro_receive(struct napi_struct *napi,
This commit adds a variation on netif_rx() designed to allow non-NAPI Ethernet MAC drivers to support hardware time stamping in PHY devices. Adapting a given driver requires two small changes, namely replacing netif_rx() with netif_rx_defer() and adding a call to skb_tx_timestamp() in the transmission path. Signed-off-by: Richard Cochran <richard.cochran@omicron.at> --- include/linux/netdevice.h | 21 +++++++++++++++++++++ 1 files changed, 21 insertions(+), 0 deletions(-)