ionic: add Rx dropped packet counter

Add a counter for packets dropped by the driver, typically
for bad size or a receive error seen by the device.

Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/pensando/ionic/ionic_lif.h b/drivers/net/ethernet/pensando/ionic/ionic_lif.h
index a55fd1f..9c5a7dd 100644 (file)
--- a/drivers/net/ethernet/pensando/ionic/ionic_lif.h
+++ b/drivers/net/ethernet/pensando/ionic/ionic_lif.h
@@ -37,6 +37,7 @@ struct ionic_rx_stats {
        u64 csum_complete;
        u64 csum_error;
        u64 buffers_posted;
+       u64 dropped;
 };
 
 #define IONIC_QCQ_F_INITED             BIT(0)

diff --git a/drivers/net/ethernet/pensando/ionic/ionic_stats.c b/drivers/net/ethernet/pensando/ionic/ionic_stats.c
index 03916b6..a1e9796 100644 (file)
--- a/drivers/net/ethernet/pensando/ionic/ionic_stats.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_stats.c
@@ -39,6 +39,7 @@ static const struct ionic_stat_desc ionic_rx_stats_desc[] = {
        IONIC_RX_STAT_DESC(csum_none),
        IONIC_RX_STAT_DESC(csum_complete),
        IONIC_RX_STAT_DESC(csum_error),
+       IONIC_RX_STAT_DESC(dropped),
 };
 
 static const struct ionic_stat_desc ionic_txq_stats_desc[] = {

diff --git a/drivers/net/ethernet/pensando/ionic/ionic_txrx.c b/drivers/net/ethernet/pensando/ionic/ionic_txrx.c
index 97e7994..a009bbe 100644 (file)
--- a/drivers/net/ethernet/pensando/ionic/ionic_txrx.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_txrx.c
@@ -152,12 +152,16 @@ static void ionic_rx_clean(struct ionic_queue *q, struct ionic_desc_info *desc_i
        stats = q_to_rx_stats(q);
        netdev = q->lif->netdev;
 
-       if (comp->status)
+       if (comp->status) {
+               stats->dropped++;
                return;
+       }
 
        /* no packet processing while resetting */
-       if (unlikely(test_bit(IONIC_LIF_QUEUE_RESET, q->lif->state)))
+       if (unlikely(test_bit(IONIC_LIF_QUEUE_RESET, q->lif->state))) {
+               stats->dropped++;
                return;
+       }
 
        stats->pkts++;
        stats->bytes += le16_to_cpu(comp->len);
@@ -167,8 +171,10 @@ static void ionic_rx_clean(struct ionic_queue *q, struct ionic_desc_info *desc_i
        else
                skb = ionic_rx_frags(q, desc_info, cq_info);
 
-       if (unlikely(!skb))
+       if (unlikely(!skb)) {
+               stats->dropped++;
                return;
+       }
 
        skb_record_rx_queue(skb, q->index);