diff options
| author | Jisheng Zhang <jszhang@kernel.org> | 2023-06-14 19:20:35 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2023-06-16 08:56:46 +0300 |
| commit | 18da174d865a87d47d2f33f5b0a322efcf067728 (patch) | |
| tree | 5427fa9b26c8f89e11c014afa35371019353d06d /drivers/net/ethernet/litex | |
| parent | 7deb0c3c24c474e0b79ea03f965b91c9cb1ba08f (diff) | |
| download | linux-18da174d865a87d47d2f33f5b0a322efcf067728.tar.xz | |
net: ethernet: litex: add support for 64 bit stats
Implement 64 bit per cpu stats to fix the overflow of netdev->stats
on 32 bit platforms. To simplify the code, we use net core
pcpu_sw_netstats infrastructure. One small drawback is some memory
overhead because litex uses just one queue, but we allocate the
counters per cpu.
Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Acked-by: Gabriel Somlo <gsomlo@gmail.com>
Link: https://lore.kernel.org/r/20230614162035.300-1-jszhang@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers/net/ethernet/litex')
| -rw-r--r-- | drivers/net/ethernet/litex/litex_liteeth.c | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/drivers/net/ethernet/litex/litex_liteeth.c b/drivers/net/ethernet/litex/litex_liteeth.c index 35f24e0f0934..ffa96059079c 100644 --- a/drivers/net/ethernet/litex/litex_liteeth.c +++ b/drivers/net/ethernet/litex/litex_liteeth.c @@ -78,8 +78,7 @@ static int liteeth_rx(struct net_device *netdev) memcpy_fromio(data, priv->rx_base + rx_slot * priv->slot_size, len); skb->protocol = eth_type_trans(skb, netdev); - netdev->stats.rx_packets++; - netdev->stats.rx_bytes += len; + dev_sw_netstats_rx_add(netdev, len); return netif_rx(skb); @@ -185,8 +184,7 @@ static netdev_tx_t liteeth_start_xmit(struct sk_buff *skb, litex_write16(priv->base + LITEETH_READER_LENGTH, skb->len); litex_write8(priv->base + LITEETH_READER_START, 1); - netdev->stats.tx_bytes += skb->len; - netdev->stats.tx_packets++; + dev_sw_netstats_tx_add(netdev, 1, skb->len); priv->tx_slot = (priv->tx_slot + 1) % priv->num_tx_slots; dev_kfree_skb_any(skb); @@ -194,9 +192,17 @@ static netdev_tx_t liteeth_start_xmit(struct sk_buff *skb, return NETDEV_TX_OK; } +static void +liteeth_get_stats64(struct net_device *netdev, struct rtnl_link_stats64 *stats) +{ + netdev_stats_to_stats64(stats, &netdev->stats); + dev_fetch_sw_netstats(stats, netdev->tstats); +} + static const struct net_device_ops liteeth_netdev_ops = { .ndo_open = liteeth_open, .ndo_stop = liteeth_stop, + .ndo_get_stats64 = liteeth_get_stats64, .ndo_start_xmit = liteeth_start_xmit, }; @@ -242,6 +248,11 @@ static int liteeth_probe(struct platform_device *pdev) priv->netdev = netdev; priv->dev = &pdev->dev; + netdev->tstats = devm_netdev_alloc_pcpu_stats(&pdev->dev, + struct pcpu_sw_netstats); + if (!netdev->tstats) + return -ENOMEM; + irq = platform_get_irq(pdev, 0); if (irq < 0) return irq; |