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Subject[PATCH net-next v6 8/9] forcedeth: account for dropped RX frames
Date
This adds code to update the stats counter for dropped RX frames.



Signed-off-by: David Decotigny <david.decotigny@google.com>
---
drivers/net/ethernet/nvidia/forcedeth.c | 14 ++++++++++++--
1 files changed, 12 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/nvidia/forcedeth.c b/drivers/net/ethernet/nvidia/forcedeth.c
index 427c9c1..9bf993d 100644
--- a/drivers/net/ethernet/nvidia/forcedeth.c
+++ b/drivers/net/ethernet/nvidia/forcedeth.c
@@ -815,6 +815,7 @@ struct fe_priv {
u64 stat_rx_packets;
u64 stat_rx_bytes; /* not always available in HW */
u64 stat_rx_missed_errors;
+ u64 stat_rx_dropped;

/* media detection workaround.
* Locking: Within irq hander or disable_irq+spin_lock(&np->lock);
@@ -1758,6 +1759,7 @@ nv_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *storage)
syncp_start = u64_stats_fetch_begin(&np->swstats_rx_syncp);
storage->rx_packets = np->stat_rx_packets;
storage->rx_bytes = np->stat_rx_bytes;
+ storage->rx_dropped = np->stat_rx_dropped;
storage->rx_missed_errors = np->stat_rx_missed_errors;
} while (u64_stats_fetch_retry(&np->swstats_rx_syncp, syncp_start));

@@ -1828,8 +1830,12 @@ static int nv_alloc_rx(struct net_device *dev)
np->put_rx.orig = np->first_rx.orig;
if (unlikely(np->put_rx_ctx++ == np->last_rx_ctx))
np->put_rx_ctx = np->first_rx_ctx;
- } else
+ } else {
+ u64_stats_update_begin(&np->swstats_rx_syncp);
+ np->stat_rx_dropped++;
+ u64_stats_update_end(&np->swstats_rx_syncp);
return 1;
+ }
}
return 0;
}
@@ -1860,8 +1866,12 @@ static int nv_alloc_rx_optimized(struct net_device *dev)
np->put_rx.ex = np->first_rx.ex;
if (unlikely(np->put_rx_ctx++ == np->last_rx_ctx))
np->put_rx_ctx = np->first_rx_ctx;
- } else
+ } else {
+ u64_stats_update_begin(&np->swstats_rx_syncp);
+ np->stat_rx_dropped++;
+ u64_stats_update_end(&np->swstats_rx_syncp);
return 1;
+ }
}
return 0;
}
--
1.7.3.1


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