[PATCH net-next] 8139too: Add 64bit statistics

Junchang Wang
2012-03-05T11:32:26Z

Switch to use ndo_get_stats64 to get 64bit statistics.
Two sync entries are used (one for Rx and one for Tx).

Signed-off-by: Junchang Wang <junchangwang@gmail.com>
---
drivers/net/ethernet/realtek/8139too.c | 61 +++++++++++++++++++++++++++----
1 files changed, 53 insertions(+), 8 deletions(-)

diff --git a/drivers/net/ethernet/realtek/8139too.c b/drivers/net/ethernet/realtek/8139too.c
index abd6aca..a00d76b 100644
--- a/drivers/net/ethernet/realtek/8139too.c
+++ b/drivers/net/ethernet/realtek/8139too.c
@@ -565,6 +565,12 @@ struct rtl_extra_stats {
unsigned long rx_lost_in_ring;
};

+struct rtl8139_stats {
+ u64 packets;
+ u64 bytes;
+ struct u64_stats_sync syncp;
+};
+
struct rtl8139_private {
void __iomem *mmio_addr;
int drv_flags;
@@ -575,11 +581,13 @@ struct rtl8139_private {

unsigned char *rx_ring;
unsigned int cur_rx; /* RX buf index of next pkt */
+ struct rtl8139_stats rx_stats;
dma_addr_t rx_ring_dma;

unsigned int tx_flag;
unsigned long cur_tx;
unsigned long dirty_tx;
+ struct rtl8139_stats tx_stats;
unsigned char *tx_buf[NUM_TX_DESC]; /* Tx bounce buffers */
unsigned char *tx_bufs; /* Tx bounce buffer region. */
dma_addr_t tx_bufs_dma;
@@ -641,7 +649,9 @@ static int rtl8139_poll(struct napi_struct *napi, int budget);
static irqreturn_t rtl8139_interrupt (int irq, void *dev_instance);
static int rtl8139_close (struct net_device *dev);
static int netdev_ioctl (struct net_device *dev, struct ifreq *rq, int cmd);
-static struct net_device_stats *rtl8139_get_stats (struct net_device *dev);
+static struct rtnl_link_stats64 *rtl8139_get_stats64(struct net_device *dev,
+ struct rtnl_link_stats64
+ *stats);
static void rtl8139_set_rx_mode (struct net_device *dev);
static void __set_rx_mode (struct net_device *dev);
static void rtl8139_hw_start (struct net_device *dev);
@@ -937,7 +947,7 @@ static int rtl8139_set_features(struct net_device *dev, netdev_features_t featur
static const struct net_device_ops rtl8139_netdev_ops = {
.ndo_open = rtl8139_open,
.ndo_stop = rtl8139_close,
- .ndo_get_stats = rtl8139_get_stats,
+ .ndo_get_stats64 = rtl8139_get_stats64,
.ndo_change_mtu = eth_change_mtu,
.ndo_validate_addr = eth_validate_addr,
.ndo_set_mac_address = rtl8139_set_mac_address,
@@ -1807,8 +1817,10 @@ static void rtl8139_tx_interrupt (struct net_device *dev,
dev->stats.tx_fifo_errors++;
}
dev->stats.collisions += (txstatus >> 24) & 15;
- dev->stats.tx_bytes += txstatus & 0x7ff;
- dev->stats.tx_packets++;
+ u64_stats_update_begin(&tp->tx_stats.syncp);
+ tp->tx_stats.packets++;
+ tp->tx_stats.bytes += txstatus & 0x7ff;
+ u64_stats_update_end(&tp->tx_stats.syncp);
}

dirty_tx++;
@@ -2050,8 +2062,10 @@ keep_pkt:

skb->protocol = eth_type_trans (skb, dev);

- dev->stats.rx_bytes += pkt_size;
- dev->stats.rx_packets++;
+ u64_stats_update_begin(&tp->rx_stats.syncp);
+ tp->rx_stats.packets++;
+ tp->rx_stats.bytes += pkt_size;
+ u64_stats_update_end(&tp->rx_stats.syncp);

netif_receive_skb (skb);
} else {
@@ -2515,11 +2529,13 @@ static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
}

-static struct net_device_stats *rtl8139_get_stats (struct net_device *dev)
+static struct rtnl_link_stats64 *
+rtl8139_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
{
struct rtl8139_private *tp = netdev_priv(dev);
void __iomem *ioaddr = tp->mmio_addr;
unsigned long flags;
+ unsigned int start;

if (netif_running(dev)) {
spin_lock_irqsave (&tp->lock, flags);
@@ -2528,7 +2544,36 @@ static struct net_device_stats *rtl8139_get_stats (struct net_device *dev)
spin_unlock_irqrestore (&tp->lock, flags);
}

- return &dev->stats;
+ do {
+ start = u64_stats_fetch_begin_bh(&tp->rx_stats.syncp);
+ stats->rx_packets = tp->rx_stats.packets;
+ stats->rx_bytes = tp->rx_stats.bytes;
+ } while (u64_stats_fetch_retry_bh(&tp->rx_stats.syncp, start));
+
+ do {
+ start = u64_stats_fetch_begin_bh(&tp->tx_stats.syncp);
+ stats->tx_packets = tp->tx_stats.packets;
+ stats->tx_bytes = tp->tx_stats.bytes;
+ } while (u64_stats_fetch_retry_bh(&tp->tx_stats.syncp, start));
+
+ stats->rx_errors = dev->stats.rx_errors;
+ stats->tx_errors = dev->stats.tx_errors;
+ stats->rx_dropped = dev->stats.rx_dropped;
+ stats->tx_dropped = dev->stats.tx_dropped;
+ stats->collisions = dev->stats.collisions;
+
+ stats->rx_length_errors = dev->stats.rx_length_errors;
+ stats->rx_crc_errors = dev->stats.rx_crc_errors;
+ stats->rx_frame_errors = dev->stats.rx_frame_errors;
+ stats->rx_fifo_errors = dev->stats.rx_fifo_errors;
+ stats->rx_missed_errors = dev->stats.rx_missed_errors;
+
+ stats->tx_aborted_errors = dev->stats.tx_aborted_errors;
+ stats->tx_carrier_errors = dev->stats.tx_carrier_errors;
+ stats->tx_fifo_errors = dev->stats.tx_fifo_errors;
+ stats->tx_window_errors = dev->stats.tx_window_errors;
+
+ return stats;
}

/* Set or clear the multicast filter for this adaptor.
--

--Junchang