From d68e2d3bd229721ad3ea0f6bec7d3407cf8bf1f9 Mon Sep 17 00:00:00 2001 From: Chris Metcalf Date: Thu, 25 Jul 2013 12:41:15 -0400 Subject: [PATCH] tile: handle 64-bit statistics in tilepro network driver Signed-off-by: Chris Metcalf Signed-off-by: David S. Miller --- drivers/net/ethernet/tile/tilepro.c | 77 ++++++++++++++++++++--------- 1 file changed, 54 insertions(+), 23 deletions(-) diff --git a/drivers/net/ethernet/tile/tilepro.c b/drivers/net/ethernet/tile/tilepro.c index 36435499814b..f66ac2000c00 100644 --- a/drivers/net/ethernet/tile/tilepro.c +++ b/drivers/net/ethernet/tile/tilepro.c @@ -31,6 +31,7 @@ #include #include #include +#include #include #include @@ -156,10 +157,13 @@ struct tile_netio_queue { * Statistics counters for a specific cpu and device. */ struct tile_net_stats_t { - u32 rx_packets; - u32 rx_bytes; - u32 tx_packets; - u32 tx_bytes; + struct u64_stats_sync syncp; + u64 rx_packets; /* total packets received */ + u64 tx_packets; /* total packets transmitted */ + u64 rx_bytes; /* total bytes received */ + u64 tx_bytes; /* total bytes transmitted */ + u64 rx_errors; /* packets truncated or marked bad by hw */ + u64 rx_dropped; /* packets not for us or intf not up */ }; @@ -218,8 +222,6 @@ struct tile_net_priv { int network_cpus_count; /* Credits per network cpu. */ int network_cpus_credits; - /* Network stats. */ - struct net_device_stats stats; /* For NetIO bringup retries. */ struct delayed_work retry_work; /* Quick access to per cpu data. */ @@ -847,6 +849,8 @@ static bool tile_net_poll_aux(struct tile_net_cpu *info, int index) } } + u64_stats_update_begin(&stats->syncp); + if (filter) { /* ISSUE: Update "drop" statistics? */ @@ -881,6 +885,8 @@ static bool tile_net_poll_aux(struct tile_net_cpu *info, int index) stats->rx_bytes += len; } + u64_stats_update_end(&stats->syncp); + /* ISSUE: It would be nice to defer this until the packet has */ /* actually been processed. */ tile_net_return_credit(info); @@ -1907,8 +1913,10 @@ busy: kfree_skb(olds[i]); /* Update stats. */ + u64_stats_update_begin(&stats->syncp); stats->tx_packets += num_segs; stats->tx_bytes += (num_segs * sh_len) + d_len; + u64_stats_update_end(&stats->syncp); /* Make sure the egress timer is scheduled. */ tile_net_schedule_egress_timer(info); @@ -2089,8 +2097,10 @@ busy: kfree_skb(olds[i]); /* HACK: Track "expanded" size for short packets (e.g. 42 < 60). */ + u64_stats_update_begin(&stats->syncp); stats->tx_packets++; stats->tx_bytes += ((len >= ETH_ZLEN) ? len : ETH_ZLEN); + u64_stats_update_end(&stats->syncp); /* Make sure the egress timer is scheduled. */ tile_net_schedule_egress_timer(info); @@ -2127,30 +2137,51 @@ static int tile_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) * * Returns the address of the device statistics structure. */ -static struct net_device_stats *tile_net_get_stats(struct net_device *dev) +static struct rtnl_link_stats64 *tile_net_get_stats64(struct net_device *dev, + struct rtnl_link_stats64 *stats) { struct tile_net_priv *priv = netdev_priv(dev); - u32 rx_packets = 0; - u32 tx_packets = 0; - u32 rx_bytes = 0; - u32 tx_bytes = 0; + u64 rx_packets = 0, tx_packets = 0; + u64 rx_bytes = 0, tx_bytes = 0; + u64 rx_errors = 0, rx_dropped = 0; int i; for_each_online_cpu(i) { - if (priv->cpu[i]) { - rx_packets += priv->cpu[i]->stats.rx_packets; - rx_bytes += priv->cpu[i]->stats.rx_bytes; - tx_packets += priv->cpu[i]->stats.tx_packets; - tx_bytes += priv->cpu[i]->stats.tx_bytes; - } + struct tile_net_stats_t *cpu_stats; + u64 trx_packets, ttx_packets, trx_bytes, ttx_bytes; + u64 trx_errors, trx_dropped; + unsigned int start; + + if (priv->cpu[i] == NULL) + continue; + cpu_stats = &priv->cpu[i]->stats; + + do { + start = u64_stats_fetch_begin_bh(&cpu_stats->syncp); + trx_packets = cpu_stats->rx_packets; + ttx_packets = cpu_stats->tx_packets; + trx_bytes = cpu_stats->rx_bytes; + ttx_bytes = cpu_stats->tx_bytes; + trx_errors = cpu_stats->rx_errors; + trx_dropped = cpu_stats->rx_dropped; + } while (u64_stats_fetch_retry_bh(&cpu_stats->syncp, start)); + + rx_packets += trx_packets; + tx_packets += ttx_packets; + rx_bytes += trx_bytes; + tx_bytes += ttx_bytes; + rx_errors += trx_errors; + rx_dropped += trx_dropped; } - priv->stats.rx_packets = rx_packets; - priv->stats.rx_bytes = rx_bytes; - priv->stats.tx_packets = tx_packets; - priv->stats.tx_bytes = tx_bytes; + stats->rx_packets = rx_packets; + stats->tx_packets = tx_packets; + stats->rx_bytes = rx_bytes; + stats->tx_bytes = tx_bytes; + stats->rx_errors = rx_errors; + stats->rx_dropped = rx_dropped; - return &priv->stats; + return stats; } @@ -2287,7 +2318,7 @@ static const struct net_device_ops tile_net_ops = { .ndo_stop = tile_net_stop, .ndo_start_xmit = tile_net_tx, .ndo_do_ioctl = tile_net_ioctl, - .ndo_get_stats = tile_net_get_stats, + .ndo_get_stats64 = tile_net_get_stats64, .ndo_change_mtu = tile_net_change_mtu, .ndo_tx_timeout = tile_net_tx_timeout, .ndo_set_mac_address = tile_net_set_mac_address, -- 2.20.1