NIU: Implement discard counters, info/debug statements.

Discard packet counter debug statements that can be turned on
at runtime by users to assist debugging of the driver code.

Signed-off-by: Jesper Dangaard Brouer <hawk@comx.dk>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/net/niu.c b/drivers/net/niu.c
index 7b6cdd07c85f..671721c8ca65 100644
--- a/drivers/net/niu.c
+++ b/drivers/net/niu.c
@@ -3558,6 +3558,9 @@ static inline void niu_sync_rx_discard_stats(struct niu *np,
                 if (unlikely(misc & RXMISC_OFLOW))
                         dev_err(np->device, "rx-%d: Counter overflow "
                                 "RXMISC discard\n", rx_channel);
+
+                niudbg(RX_ERR, "%s-rx-%d: MISC drop=%u over=%u\n",
+                       np->dev->name, rx_channel, misc, misc-limit);
         }
 
         /* WRED (Weighted Random Early Discard) by hardware */
@@ -3569,6 +3572,9 @@ static inline void niu_sync_rx_discard_stats(struct niu *np,
                 if (unlikely(wred & RED_DIS_CNT_OFLOW))
                         dev_err(np->device, "rx-%d: Counter overflow "
                                 "WRED discard\n", rx_channel);
+
+                niudbg(RX_ERR, "%s-rx-%d: WRED drop=%u over=%u\n",
+                       np->dev->name, rx_channel, wred, wred-limit);
         }
 }