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authorCorinna Vinschen <vinschen@redhat.com>2015-08-27 17:11:48 +0200
committerDavid S. Miller <davem@davemloft.net>2015-08-28 13:22:50 -0700
commitd7d2d89d4b0afa8f4c2b169475a0c6e43553c146 (patch)
tree7d717b2a63eee5d3e371e469f0854e91d99291c2 /drivers/net/ethernet/realtek/r8169.c
parent0d36938bb82a7775c21ce0a7429f08ba13d025b6 (diff)
downloadlinux-linaro-stable-d7d2d89d4b0afa8f4c2b169475a0c6e43553c146.tar.gz
r8169: Add software counter for multicast packages
The multicast hardware counter on 8168/8111 chips is only 32 bit while the statistics in struct rtnl_link_stats64 are 64 bit. Given that statistics are requested on an irregular basis, an overflow of the hardware counter can go unnoticed. To count even very large numbers of multicast packets reliably, add a software counter and remove previously applied code to fill the multicast field requested by @rtl8169_get_stats64 with the values read from the rx_multicast hardware counter. Signed-off-by: Corinna Vinschen <vinschen@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/realtek/r8169.c')
-rw-r--r--drivers/net/ethernet/realtek/r8169.c9
1 files changed, 4 insertions, 5 deletions
diff --git a/drivers/net/ethernet/realtek/r8169.c b/drivers/net/ethernet/realtek/r8169.c
index d6d39df5b3dc..24dcbe62412a 100644
--- a/drivers/net/ethernet/realtek/r8169.c
+++ b/drivers/net/ethernet/realtek/r8169.c
@@ -754,7 +754,6 @@ struct rtl8169_tc_offsets {
bool inited;
__le64 tx_errors;
__le32 tx_multi_collision;
- __le32 rx_multicast;
__le16 tx_aborted;
};
@@ -2326,7 +2325,6 @@ static bool rtl8169_init_counter_offsets(struct net_device *dev)
tp->tc_offset.tx_errors = tp->counters.tx_errors;
tp->tc_offset.tx_multi_collision = tp->counters.tx_multi_collision;
- tp->tc_offset.rx_multicast = tp->counters.rx_multicast;
tp->tc_offset.tx_aborted = tp->counters.tx_aborted;
tp->tc_offset.inited = true;
@@ -7480,6 +7478,9 @@ process_pkt:
tp->rx_stats.packets++;
tp->rx_stats.bytes += pkt_size;
u64_stats_update_end(&tp->rx_stats.syncp);
+
+ if (skb->pkt_type == PACKET_MULTICAST)
+ dev->stats.multicast++;
}
release_descriptor:
desc->opts2 = 0;
@@ -7790,7 +7791,6 @@ rtl8169_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
stats->rx_bytes = tp->rx_stats.bytes;
} while (u64_stats_fetch_retry_irq(&tp->rx_stats.syncp, start));
-
do {
start = u64_stats_fetch_begin_irq(&tp->tx_stats.syncp);
stats->tx_packets = tp->tx_stats.packets;
@@ -7804,6 +7804,7 @@ rtl8169_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
stats->rx_crc_errors = dev->stats.rx_crc_errors;
stats->rx_fifo_errors = dev->stats.rx_fifo_errors;
stats->rx_missed_errors = dev->stats.rx_missed_errors;
+ stats->multicast = dev->stats.multicast;
/*
* Fetch additonal counter values missing in stats collected by driver
@@ -7819,8 +7820,6 @@ rtl8169_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
le64_to_cpu(tp->tc_offset.tx_errors);
stats->collisions = le32_to_cpu(tp->counters.tx_multi_collision) -
le32_to_cpu(tp->tc_offset.tx_multi_collision);
- stats->multicast = le32_to_cpu(tp->counters.rx_multicast) -
- le32_to_cpu(tp->tc_offset.rx_multicast);
stats->tx_aborted_errors = le16_to_cpu(tp->counters.tx_aborted) -
le16_to_cpu(tp->tc_offset.tx_aborted);