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tg3: Save stats across chip resets

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Tg3 has a place to store stats, but doesn't really use it.  This patch
modifies the driver so that stats are saved across chip resets and gets
cleared across close / open calls.

Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Reviewed-by: Michael Chan <mchan@broadcom.com>
Reviewed-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Matt Carlson 2011-12-08 14:40:14 +00:00 committed by David S. Miller
parent 0e6c9da35e
commit 92feeabf3f
1 changed files with 17 additions and 9 deletions
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26
drivers/net/ethernet/broadcom/tg3.c
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@ -7588,8 +7588,6 @@ static int tg3_abort_hw(struct tg3 *tp, int silent)
if (tnapi->hw_status)
memset(tnapi->hw_status, 0, TG3_HW_STATUS_SIZE);
}
if (tp->hw_stats)
memset(tp->hw_stats, 0, sizeof(struct tg3_hw_stats));
return err;
}
@ -7905,6 +7903,11 @@ static int tg3_chip_reset(struct tg3 *tp)
return 0;
}
static struct rtnl_link_stats64 *tg3_get_stats64(struct net_device *,
struct rtnl_link_stats64 *);
static struct tg3_ethtool_stats *tg3_get_estats(struct tg3 *,
struct tg3_ethtool_stats *);
/* tp->lock is held. */
static int tg3_halt(struct tg3 *tp, int kind, int silent)
{
@ -7922,6 +7925,15 @@ static int tg3_halt(struct tg3 *tp, int kind, int silent)
tg3_write_sig_legacy(tp, kind);
tg3_write_sig_post_reset(tp, kind);
if (tp->hw_stats) {
/* Save the stats across chip resets... */
tg3_get_stats64(tp->dev, &tp->net_stats_prev),
tg3_get_estats(tp, &tp->estats_prev);
/* And make sure the next sample is new data */
memset(tp->hw_stats, 0, sizeof(struct tg3_hw_stats));
}
if (err)
return err;
@ -9768,11 +9780,6 @@ err_out1:
return err;
}
static struct rtnl_link_stats64 *tg3_get_stats64(struct net_device *,
struct rtnl_link_stats64 *);
static struct tg3_ethtool_stats *tg3_get_estats(struct tg3 *,
struct tg3_ethtool_stats *);
static int tg3_close(struct net_device *dev)
{
int i;
@ -9804,8 +9811,9 @@ static int tg3_close(struct net_device *dev)
tg3_ints_fini(tp);
tg3_get_stats64(tp->dev, &tp->net_stats_prev);
tg3_get_estats(tp, &tp->estats_prev);
/* Clear stats across close / open calls */
memset(&tp->net_stats_prev, 0, sizeof(tp->net_stats_prev));
memset(&tp->estats_prev, 0, sizeof(tp->estats_prev));
tg3_napi_fini(tp);