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Subject[PATCH net-next v3 7/9] forcedeth: new ethtool stat counter for TX timeouts
Date
This change publishes a new ethtool stats: tx_timeout that counts the
number of times the tx_timeout callback was triggered.



Signed-off-by: David Decotigny <david.decotigny@google.com>
---
drivers/net/ethernet/nvidia/forcedeth.c | 6 ++++++
1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/drivers/net/ethernet/nvidia/forcedeth.c b/drivers/net/ethernet/nvidia/forcedeth.c
index 84e8d17..dd24035 100644
--- a/drivers/net/ethernet/nvidia/forcedeth.c
+++ b/drivers/net/ethernet/nvidia/forcedeth.c
@@ -633,6 +633,7 @@ static const struct nv_ethtool_str nv_estats_str[] = {
{ "rx_packets" },
{ "rx_errors_total" },
{ "tx_errors_total" },
+ { "tx_timeout" },

/* version 2 stats */
{ "tx_deferral" },
@@ -673,6 +674,7 @@ struct nv_ethtool_stats {
u64 rx_packets; /* should be ifconfig->rx_packets */
u64 rx_errors_total;
u64 tx_errors_total;
+ u64 tx_timeout;

/* version 2 stats */
u64 tx_deferral;
@@ -852,6 +854,7 @@ struct fe_priv {
struct nv_driver_stat stat_tx_packets; /* not always available in HW */
struct nv_driver_stat stat_tx_bytes;
struct nv_driver_stat stat_tx_dropped;
+ atomic_t stat_tx_timeout; /* TX timeouts since last nv_update_stats */

/* msi/msi-x fields */
u32 msi_flags;
@@ -1746,6 +1749,7 @@ static void nv_update_stats(struct net_device *dev)
NV_DRIVER_STAT_UPDATE_TOTAL(&np->stat_tx_packets);
NV_DRIVER_STAT_UPDATE_TOTAL(&np->stat_tx_bytes);
NV_DRIVER_STAT_UPDATE_TOTAL(&np->stat_tx_dropped);
+ np->estats.tx_timeout += atomic_xchg(&np->stat_tx_timeout, 0);
}

/*
@@ -2639,6 +2643,8 @@ static void nv_tx_timeout(struct net_device *dev)
}
}

+ atomic_inc(&np->stat_tx_timeout);
+
spin_lock_irq(&np->lock);

/* 1) stop tx engine */
--
1.7.3.1


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