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Commit 302476c9 authored by Paulius Zaleckas's avatar Paulius Zaleckas Committed by David S. Miller
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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: default avatarPaulius Zaleckas <paulius.zaleckas@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 44151acb

drivers/net/ethernet/marvell/mv643xx_eth.c

+14 −0
Original line number Diff line number Diff line
@@ -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),