ibmveth: Add ethtool driver stats hooks

Add ethtool hooks to ibmveth to retrieve driver statistics.

Signed-off-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 51 insertions, 0 deletions

diff --git a/drivers/net/ibmveth.c b/drivers/net/ibmveth.c
index 9bf0f92d3a50..40cb00e37df6 100644
--- a/drivers/net/ibmveth.c
+++ b/drivers/net/ibmveth.c
@@ -113,6 +113,28 @@ MODULE_DESCRIPTION("IBM i/pSeries Virtual Ethernet Driver");
 MODULE_LICENSE("GPL");
 MODULE_VERSION(ibmveth_driver_version);
 
+struct ibmveth_stat {
+        char name[ETH_GSTRING_LEN];
+        int offset;
+};
+
+#define IBMVETH_STAT_OFF(stat) offsetof(struct ibmveth_adapter, stat)
+#define IBMVETH_GET_STAT(a, off) *((u64 *)(((unsigned long)(a)) + off))
+
+struct ibmveth_stat ibmveth_stats[] = {
+        { "replenish_task_cycles", IBMVETH_STAT_OFF(replenish_task_cycles) },
+        { "replenish_no_mem", IBMVETH_STAT_OFF(replenish_no_mem) },
+        { "replenish_add_buff_failure", IBMVETH_STAT_OFF(replenish_add_buff_failure) },
+        { "replenish_add_buff_success", IBMVETH_STAT_OFF(replenish_add_buff_success) },
+        { "rx_invalid_buffer", IBMVETH_STAT_OFF(rx_invalid_buffer) },
+        { "rx_no_buffer", IBMVETH_STAT_OFF(rx_no_buffer) },
+        { "tx_multidesc_send", IBMVETH_STAT_OFF(tx_multidesc_send) },
+        { "tx_linearized", IBMVETH_STAT_OFF(tx_linearized) },
+        { "tx_linearize_failed", IBMVETH_STAT_OFF(tx_linearize_failed) },
+        { "tx_map_failed", IBMVETH_STAT_OFF(tx_map_failed) },
+        { "tx_send_failed", IBMVETH_STAT_OFF(tx_send_failed) },
+};
+
 /* simple methods of getting data from the current rxq entry */
 static inline int ibmveth_rxq_pending_buffer(struct ibmveth_adapter *adapter)
 {
@@ -769,6 +791,32 @@ static u32 ibmveth_get_rx_csum(struct net_device *dev)
         return adapter->rx_csum;
 }
 
+static void ibmveth_get_strings(struct net_device *dev, u32 stringset, u8 *data)
+{
+        int i;
+
+        if (stringset != ETH_SS_STATS)
+                return;
+
+        for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++, data += ETH_GSTRING_LEN)
+                memcpy(data, ibmveth_stats[i].name, ETH_GSTRING_LEN);
+}
+
+static int ibmveth_get_stats_count(struct net_device *dev)
+{
+        return ARRAY_SIZE(ibmveth_stats);
+}
+
+static void ibmveth_get_ethtool_stats(struct net_device *dev,
+                                      struct ethtool_stats *stats, u64 *data)
+{
+        int i;
+        struct ibmveth_adapter *adapter = dev->priv;
+
+        for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++)
+                data[i] = IBMVETH_GET_STAT(adapter, ibmveth_stats[i].offset);
+}
+
 static const struct ethtool_ops netdev_ethtool_ops = {
         .get_drvinfo            = netdev_get_drvinfo,
         .get_settings           = netdev_get_settings,
@@ -780,6 +828,9 @@ static const struct ethtool_ops netdev_ethtool_ops = {
         .set_rx_csum            = ibmveth_set_rx_csum,
         .get_tso                        = ethtool_op_get_tso,
         .get_ufo                        = ethtool_op_get_ufo,
+        .get_strings            = ibmveth_get_strings,
+        .get_stats_count                = ibmveth_get_stats_count,
+        .get_ethtool_stats      = ibmveth_get_ethtool_stats,
 };
 
 static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)