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net: bcmgenet: Add software counters to track reallocations

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When inserting the TSB, keep track of how many times we had to do
it and if there was a failure in doing so, this helps profile the
driver for possibly incorrect headroom settings.

Signed-off-by: Doug Berger <opendmb@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Doug Berger 2019-12-17 16:51:15 -08:00 committed by David S. Miller
parent e3fa85883d
commit f1af17c0b7
2 changed files with 8 additions and 0 deletions
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6
drivers/net/ethernet/broadcom/genet/bcmgenet.c
View file

@ -861,6 +861,9 @@ static const struct bcmgenet_stats bcmgenet_gstrings_stats[] = {
STAT_GENET_SOFT_MIB("alloc_rx_buff_failed", mib.alloc_rx_buff_failed),
STAT_GENET_SOFT_MIB("rx_dma_failed", mib.rx_dma_failed),
STAT_GENET_SOFT_MIB("tx_dma_failed", mib.tx_dma_failed),
STAT_GENET_SOFT_MIB("tx_realloc_tsb", mib.tx_realloc_tsb),
STAT_GENET_SOFT_MIB("tx_realloc_tsb_failed",
mib.tx_realloc_tsb_failed),
/* Per TX queues */
STAT_GENET_Q(0),
STAT_GENET_Q(1),
@ -1487,6 +1490,7 @@ static void bcmgenet_tx_reclaim_all(struct net_device *dev)
static struct sk_buff *bcmgenet_put_tx_csum(struct net_device *dev,
struct sk_buff *skb)
{
struct bcmgenet_priv *priv = netdev_priv(dev);
struct status_64 *status = NULL;
struct sk_buff *new_skb;
u16 offset;
@ -1501,11 +1505,13 @@ static struct sk_buff *bcmgenet_put_tx_csum(struct net_device *dev,
new_skb = skb_realloc_headroom(skb, sizeof(*status));
if (!new_skb) {
dev_kfree_skb_any(skb);
priv->mib.tx_realloc_tsb_failed++;
dev->stats.tx_dropped++;
return NULL;
}
dev_consume_skb_any(skb);
skb = new_skb;
priv->mib.tx_realloc_tsb++;
}
skb_push(skb, sizeof(*status));

2
drivers/net/ethernet/broadcom/genet/bcmgenet.h
View file

@ -144,6 +144,8 @@ struct bcmgenet_mib_counters {
u32 alloc_rx_buff_failed;
u32 rx_dma_failed;
u32 tx_dma_failed;
u32 tx_realloc_tsb;
u32 tx_realloc_tsb_failed;
};
#define UMAC_HD_BKP_CTRL 0x004