sunvnet: add stats to track ldom to ldom packets and bytes

In this driver, there is a "port" created for the connection to each of
the other ldoms; a netdev queue is mapped to each port, and they are
collected under a single netdev.  The generic netdev statistics show
us all the traffic in and out of our network device, but don't show
individual queue/port stats.  This patch breaks out the traffic counts
for the individual ports and gives us a little view into the state of
those connections.

Orabug: 25190537

Signed-off-by: Shannon Nelson <shannon.nelson@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 15 insertions, 0 deletions

diff --git a/drivers/net/ethernet/sun/sunvnet_common.h b/drivers/net/ethernet/sun/sunvnet_common.h
index b21ef4704bd1..c0fac03cb87a 100644
--- a/drivers/net/ethernet/sun/sunvnet_common.h
+++ b/drivers/net/ethernet/sun/sunvnet_common.h
@@ -35,6 +35,19 @@ struct vnet_tx_entry {
 
 struct vnet;
 
+struct vnet_port_stats {
+	/* keep them all the same size */
+	u32 rx_bytes;
+	u32 tx_bytes;
+	u32 rx_packets;
+	u32 tx_packets;
+	u32 event_up;
+	u32 event_reset;
+	u32 q_placeholder;
+};
+
+#define NUM_VNET_PORT_STATS  (sizeof(struct vnet_port_stats) / sizeof(u32))
+
 /* Structure to describe a vnet-port or vsw-port in the MD.
  * If the vsw bit is set, this structure represents a vswitch
  * port, and the net_device can be found from ->dev. If the
@@ -44,6 +57,8 @@ struct vnet;
 struct vnet_port {
 	struct vio_driver_state	vio;
 
+	struct vnet_port_stats stats;
+
 	struct hlist_node	hash;
 	u8			raddr[ETH_ALEN];
 	unsigned		switch_port:1;