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Date: Thu, 14 Nov 2019 11:19:14 +0100
From: Julian Wiedmann <jwi@...ux.ibm.com>
To: David Miller <davem@...emloft.net>
Cc: <netdev@...r.kernel.org>, <linux-s390@...r.kernel.org>,
Heiko Carstens <heiko.carstens@...ibm.com>,
Stefan Raspl <raspl@...ux.ibm.com>,
Ursula Braun <ubraun@...ux.ibm.com>,
Julian Wiedmann <jwi@...ux.ibm.com>
Subject: [PATCH net-next 01/11] 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@...ux.ibm.com>
---
drivers/s390/net/qeth_core.h | 7 +++++--
drivers/s390/net/qeth_core_main.c | 17 +++++++++++------
drivers/s390/net/qeth_ethtool.c | 2 ++
drivers/s390/net/qeth_l2_main.c | 1 +
drivers/s390/net/qeth_l3_main.c | 1 +
5 files changed, 20 insertions(+), 8 deletions(-)
diff --git a/drivers/s390/net/qeth_core.h b/drivers/s390/net/qeth_core.h
index d08154502b15..14edc892f7c1 100644
--- a/drivers/s390/net/qeth_core.h
+++ b/drivers/s390/net/qeth_core.h
@@ -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 {
diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c
index 9e8bd8e08146..4e113f359be9 100644
--- a/drivers/s390/net/qeth_core_main.c
+++ b/drivers/s390/net/qeth_core_main.c
@@ -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];
diff --git a/drivers/s390/net/qeth_ethtool.c b/drivers/s390/net/qeth_ethtool.c
index 096698df3886..f7485c6dea25 100644
--- a/drivers/s390/net/qeth_ethtool.c
+++ b/drivers/s390/net/qeth_ethtool.c
@@ -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)
diff --git a/drivers/s390/net/qeth_l2_main.c b/drivers/s390/net/qeth_l2_main.c
index 8f3093d24b12..1e85956f95c6 100644
--- a/drivers/s390/net/qeth_l2_main.c
+++ b/drivers/s390/net/qeth_l2_main.c
@@ -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++;
diff --git a/drivers/s390/net/qeth_l3_main.c b/drivers/s390/net/qeth_l3_main.c
index 70d4586dc779..72c61faae3f9 100644
--- a/drivers/s390/net/qeth_l3_main.c
+++ b/drivers/s390/net/qeth_l3_main.c
@@ -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++;
--
2.17.1
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