[PATCH 4/4] ibmveth: Add ethtool driver stats hooks

[Brian King]

Add ethtool hooks to ibmveth to retrieve driver statistics.

Signed-off-by: Brian King <brking at linux.vnet.ibm.com>
---

 linux-2.6-bjking1/drivers/net/ibmveth.c |   53 +++++++++++++++++++++++++++++++-
 1 file changed, 52 insertions(+), 1 deletion(-)

diff -puN drivers/net/ibmveth.c~ibmveth_ethtool_driver_stats drivers/net/ibmveth.c
--- linux-2.6/drivers/net/ibmveth.c~ibmveth_ethtool_driver_stats	2007-07-12 09:39:23.000000000 -0500
+++ linux-2.6-bjking1/drivers/net/ibmveth.c	2007-07-12 09:39:23.000000000 -0500
@@ -115,6 +115,28 @@ MODULE_VERSION(ibmveth_driver_version);
 module_param_named(csum_offload, ibmveth_csum_offload, uint, 0);
 MODULE_PARM_DESC(csum_offload, "Checksum offload (0/1). Default: 1");
 
+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)
 {
@@ -756,6 +778,32 @@ static u32 ibmveth_get_rx_csum(struct ne
 	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,
@@ -766,7 +814,10 @@ static const struct ethtool_ops netdev_e
 	.get_rx_csum		= ibmveth_get_rx_csum,
 	.set_rx_csum		= ibmveth_set_rx_csum,
 	.get_tso			= ethtool_op_get_tso,
-	.get_ufo			= ethtool_op_get_ufo
+	.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)
diff -puN drivers/net/ibmveth.h~ibmveth_ethtool_driver_stats drivers/net/ibmveth.h
_