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s390/qeth: gather more detailed RX dropped/error statistics 

Where available, use the fine-grained counters in rtnl_link_stats64 to
indicate different RX error causes. For drop reasons, use driver-private
ethtool counters.

In particular this patch allows us to keep track of driver-side drops due
to unknown/unsupported HW descriptor format.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Julian Wiedmann 2019-11-14 11:19:14 +01:00 committed by David S. Miller
parent 24df31f8d5
commit 845ef9047b
5 changed files with 20 additions and 8 deletions
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7
drivers/s390/net/qeth_core.h
View File

@ -477,12 +477,15 @@ struct qeth_card_stats {
u64 rx_sg_frags;
u64 rx_sg_alloc_page;
u64 rx_dropped_nomem;
u64 rx_dropped_notsupp;
/* rtnl_link_stats64 */
u64 rx_packets;
u64 rx_bytes;
u64 rx_errors;
u64 rx_dropped;
u64 rx_multicast;
u64 rx_length_errors;
u64 rx_fifo_errors;
};
struct qeth_out_q_stats {

17
drivers/s390/net/qeth_core_main.c
View File

@ -3093,7 +3093,7 @@ static int qeth_check_qdio_errors(struct qeth_card *card,
buf->element[14].sflags);
QETH_CARD_TEXT_(card, 2, " qerr=%X", qdio_error);
if ((buf->element[15].sflags) == 0x12) {
QETH_CARD_STAT_INC(card, rx_dropped);
QETH_CARD_STAT_INC(card, rx_fifo_errors);
return 0;
} else
return 1;
@ -4346,7 +4346,7 @@ static int qeth_mdio_read(struct net_device *dev, int phy_id, int regnum)
case MII_NWAYTEST: /* N-way auto-neg test register */
break;
case MII_RERRCOUNTER: /* rx error counter */
rc = card->stats.rx_errors;
rc = card->stats.rx_length_errors + card->stats.rx_fifo_errors;
break;
case MII_SREVISION: /* silicon revision */
break;
@ -5092,6 +5092,7 @@ struct sk_buff *qeth_core_get_next_skb(struct qeth_card *card,
headroom = sizeof(struct qeth_hdr);
break;
default:
QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
break;
}
@ -5134,7 +5135,7 @@ struct sk_buff *qeth_core_get_next_skb(struct qeth_card *card,
QETH_CARD_TEXT(card, 4, "unexeob");
QETH_CARD_HEX(card, 2, buffer, sizeof(void *));
dev_kfree_skb_any(skb);
QETH_CARD_STAT_INC(card, rx_errors);
QETH_CARD_STAT_INC(card, rx_length_errors);
return NULL;
}
element++;
@ -5156,7 +5157,7 @@ struct sk_buff *qeth_core_get_next_skb(struct qeth_card *card,
if (net_ratelimit()) {
QETH_CARD_TEXT(card, 2, "noskbmem");
}
QETH_CARD_STAT_INC(card, rx_dropped);
QETH_CARD_STAT_INC(card, rx_dropped_nomem);
return NULL;
}
EXPORT_SYMBOL_GPL(qeth_core_get_next_skb);
@ -6236,9 +6237,13 @@ void qeth_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
stats->rx_packets = card->stats.rx_packets;
stats->rx_bytes = card->stats.rx_bytes;
stats->rx_errors = card->stats.rx_errors;
stats->rx_dropped = card->stats.rx_dropped;
stats->rx_errors = card->stats.rx_length_errors +
card->stats.rx_fifo_errors;
stats->rx_dropped = card->stats.rx_dropped_nomem +
card->stats.rx_dropped_notsupp;
stats->multicast = card->stats.rx_multicast;
stats->rx_length_errors = card->stats.rx_length_errors;
stats->rx_fifo_errors = card->stats.rx_fifo_errors;
for (i = 0; i < card->qdio.no_out_queues; i++) {
queue = card->qdio.out_qs[i];

2
drivers/s390/net/qeth_ethtool.c
View File

@ -49,6 +49,8 @@ static const struct qeth_stats card_stats[] = {
QETH_CARD_STAT("rx0 SG skbs", rx_sg_skbs),
QETH_CARD_STAT("rx0 SG page frags", rx_sg_frags),
QETH_CARD_STAT("rx0 SG page allocs", rx_sg_alloc_page),
QETH_CARD_STAT("rx0 dropped, no memory", rx_dropped_nomem),
QETH_CARD_STAT("rx0 dropped, bad format", rx_dropped_notsupp),
};
#define TXQ_STATS_LEN ARRAY_SIZE(txq_stats)

1
drivers/s390/net/qeth_l2_main.c
View File

@ -336,6 +336,7 @@ static int qeth_l2_process_inbound_buffer(struct qeth_card *card,
dev_kfree_skb_any(skb);
QETH_CARD_TEXT(card, 3, "inbunkno");
QETH_DBF_HEX(CTRL, 3, hdr, sizeof(*hdr));
QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
continue;
}
work_done++;

1
drivers/s390/net/qeth_l3_main.c
View File

@ -1391,6 +1391,7 @@ static int qeth_l3_process_inbound_buffer(struct qeth_card *card,
dev_kfree_skb_any(skb);
QETH_CARD_TEXT(card, 3, "inbunkno");
QETH_DBF_HEX(CTRL, 3, hdr, sizeof(*hdr));
QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
continue;
}
work_done++;