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| author | Florian Fainelli <f.fainelli@gmail.com> | 2014-11-19 19:29:56 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-11-21 20:46:12 +0100 |
| commit | 44c8bc3ce39f4cbeb7bf13162666fb6d0aad864d (patch) | |
| tree | 1006ed319d9ebbb67df5f611989d99a63b767d45 | |
| parent | net: systemport: log RX buffer allocation and RX/TX DMA failures (diff) | |
| download | linux-44c8bc3ce39f4cbeb7bf13162666fb6d0aad864d.tar.xz linux-44c8bc3ce39f4cbeb7bf13162666fb6d0aad864d.zip | |
net: bcmgenet: log RX buffer allocation and RX/TX dma failures
To help troubleshoot heavy memory pressure conditions, add a bunch of
statistics counter to log RX buffer allocation and RX/TX DMA mapping
failures. These are reported like any other counters through the ethtool
stats interface.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/ethernet/broadcom/genet/bcmgenet.c | 10 | ||||
| -rw-r--r-- | drivers/net/ethernet/broadcom/genet/bcmgenet.h | 3 |
2 files changed, 12 insertions, 1 deletions
diff --git a/drivers/net/ethernet/broadcom/genet/bcmgenet.c b/drivers/net/ethernet/broadcom/genet/bcmgenet.c index da1a2500c91c..fcbf1255ae5a 100644 --- a/drivers/net/ethernet/broadcom/genet/bcmgenet.c +++ b/drivers/net/ethernet/broadcom/genet/bcmgenet.c @@ -613,6 +613,9 @@ static const struct bcmgenet_stats bcmgenet_gstrings_stats[] = { UMAC_RBUF_OVFL_CNT), STAT_GENET_MISC("rbuf_err_cnt", mib.rbuf_err_cnt, UMAC_RBUF_ERR_CNT), STAT_GENET_MISC("mdf_err_cnt", mib.mdf_err_cnt, UMAC_MDF_ERR_CNT), + STAT_GENET_MIB_RX("alloc_rx_buff_failed", mib.alloc_rx_buff_failed), + STAT_GENET_MIB_RX("rx_dma_failed", mib.rx_dma_failed), + STAT_GENET_MIB_TX("tx_dma_failed", mib.tx_dma_failed), }; #define BCMGENET_STATS_LEN ARRAY_SIZE(bcmgenet_gstrings_stats) @@ -989,6 +992,7 @@ static int bcmgenet_xmit_single(struct net_device *dev, mapping = dma_map_single(kdev, skb->data, skb_len, DMA_TO_DEVICE); ret = dma_mapping_error(kdev, mapping); if (ret) { + priv->mib.tx_dma_failed++; netif_err(priv, tx_err, dev, "Tx DMA map failed\n"); dev_kfree_skb(skb); return ret; @@ -1035,6 +1039,7 @@ static int bcmgenet_xmit_frag(struct net_device *dev, skb_frag_size(frag), DMA_TO_DEVICE); ret = dma_mapping_error(kdev, mapping); if (ret) { + priv->mib.tx_dma_failed++; netif_err(priv, tx_err, dev, "%s: Tx DMA map failed\n", __func__); return ret; @@ -1231,6 +1236,7 @@ static int bcmgenet_rx_refill(struct bcmgenet_priv *priv, struct enet_cb *cb) priv->rx_buf_len, DMA_FROM_DEVICE); ret = dma_mapping_error(kdev, mapping); if (ret) { + priv->mib.rx_dma_failed++; bcmgenet_free_cb(cb); netif_err(priv, rx_err, priv->dev, "%s DMA map failed\n", __func__); @@ -1397,8 +1403,10 @@ static unsigned int bcmgenet_desc_rx(struct bcmgenet_priv *priv, /* refill RX path on the current control block */ refill: err = bcmgenet_rx_refill(priv, cb); - if (err) + if (err) { + priv->mib.alloc_rx_buff_failed++; netif_err(priv, rx_err, dev, "Rx refill failed\n"); + } rxpktprocessed++; priv->rx_read_ptr++; diff --git a/drivers/net/ethernet/broadcom/genet/bcmgenet.h b/drivers/net/ethernet/broadcom/genet/bcmgenet.h index 31b2da5f9b82..c4ca7282a601 100644 --- a/drivers/net/ethernet/broadcom/genet/bcmgenet.h +++ b/drivers/net/ethernet/broadcom/genet/bcmgenet.h @@ -143,6 +143,9 @@ struct bcmgenet_mib_counters { u32 rbuf_ovflow_cnt; u32 rbuf_err_cnt; u32 mdf_err_cnt; + u32 alloc_rx_buff_failed; + u32 rx_dma_failed; + u32 tx_dma_failed; }; #define UMAC_HD_BKP_CTRL 0x004 |