Patchwork [net-next,v6,8/9] forcedeth: account for dropped RX frames

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Submitter david decotigny
Date Nov. 16, 2011, 10:15 p.m.
Message ID <5bbe62a35ef59180b02d8dd0086641a04b17d38a.1321481064.git.david.decotigny@google.com>
Download mbox | patch
Permalink /patch/126051/
State Accepted
Delegated to: David Miller
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Comments

david decotigny - Nov. 16, 2011, 10:15 p.m.
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(-)

Patch

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;
 }