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authorPaulius Zaleckas <paulius.zaleckas@gmail.com>2012-01-23 01:16:35 +0000
committerDavid S. Miller <davem@davemloft.net>2012-01-23 14:00:58 -0500
commit302476c99863fe6d08eed6145e37322892ab7f55 (patch)
treee9f7beae3c13644fdb233c7d34b2bc9bf88e4366 /drivers/net/ethernet
parent44151acb9f13563e40d40d14c3e5c11ce21b59e1 (diff)
downloadlinux-linaro-stable-302476c99863fe6d08eed6145e37322892ab7f55.tar.gz
mv643xx_eth: Add Rx Discard and Rx Overrun statistics
These statistics helped me a lot while searching who is losing packets in my setup. I added these stats to MIB group since they are very similar, but just in other registers. I have tested this patch on 88F6281 SoC. Signed-off-by: Paulius Zaleckas <paulius.zaleckas@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet')
-rw-r--r--drivers/net/ethernet/marvell/mv643xx_eth.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/net/ethernet/marvell/mv643xx_eth.c b/drivers/net/ethernet/marvell/mv643xx_eth.c
index 9c049d2cb97d..9edecfa1f0f4 100644
--- a/drivers/net/ethernet/marvell/mv643xx_eth.c
+++ b/drivers/net/ethernet/marvell/mv643xx_eth.c
@@ -136,6 +136,8 @@ static char mv643xx_eth_driver_version[] = "1.4";
#define INT_MASK 0x0068
#define INT_MASK_EXT 0x006c
#define TX_FIFO_URGENT_THRESHOLD 0x0074
+#define RX_DISCARD_FRAME_CNT 0x0084
+#define RX_OVERRUN_FRAME_CNT 0x0088
#define TXQ_FIX_PRIO_CONF_MOVED 0x00dc
#define TX_BW_RATE_MOVED 0x00e0
#define TX_BW_MTU_MOVED 0x00e8
@@ -334,6 +336,9 @@ struct mib_counters {
u32 bad_crc_event;
u32 collision;
u32 late_collision;
+ /* Non MIB hardware counters */
+ u32 rx_discard;
+ u32 rx_overrun;
};
struct lro_counters {
@@ -1225,6 +1230,10 @@ static void mib_counters_clear(struct mv643xx_eth_private *mp)
for (i = 0; i < 0x80; i += 4)
mib_read(mp, i);
+
+ /* Clear non MIB hw counters also */
+ rdlp(mp, RX_DISCARD_FRAME_CNT);
+ rdlp(mp, RX_OVERRUN_FRAME_CNT);
}
static void mib_counters_update(struct mv643xx_eth_private *mp)
@@ -1262,6 +1271,9 @@ static void mib_counters_update(struct mv643xx_eth_private *mp)
p->bad_crc_event += mib_read(mp, 0x74);
p->collision += mib_read(mp, 0x78);
p->late_collision += mib_read(mp, 0x7c);
+ /* Non MIB hardware counters */
+ p->rx_discard += rdlp(mp, RX_DISCARD_FRAME_CNT);
+ p->rx_overrun += rdlp(mp, RX_OVERRUN_FRAME_CNT);
spin_unlock_bh(&mp->mib_counters_lock);
mod_timer(&mp->mib_counters_timer, jiffies + 30 * HZ);
@@ -1413,6 +1425,8 @@ static const struct mv643xx_eth_stats mv643xx_eth_stats[] = {
MIBSTAT(bad_crc_event),
MIBSTAT(collision),
MIBSTAT(late_collision),
+ MIBSTAT(rx_discard),
+ MIBSTAT(rx_overrun),
LROSTAT(lro_aggregated),
LROSTAT(lro_flushed),
LROSTAT(lro_no_desc),