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Message-ID: <alpine.LFD.2.03.1407141534440.19512@solarflare.com>
Date: Tue, 15 Jul 2014 11:58:12 +0100
From: Edward Cree <ecree@...arflare.com>
To: <netdev@...r.kernel.org>
CC: Dave Miller <davem@...emloft.net>,
<linux-net-drivers@...arflare.com>
Subject: [PATCH net-next] sfc: add extra RX drop counters for nodesc_trunc
and noskb_drop
Added a counter rx_noskb_drop for failure to allocate an skb.
Summed the per-channel rx_nodesc_trunc counters earlier so that they can
be included in rx_dropped.
Signed-off-by: Edward Cree <ecree@...arflare.com>
---
Tested that new stats appear in ethtool -S.
However, because of the way the GENERIC_STATs are defined, they appear
at the top of the output. Does the order of stats matter?
---
drivers/net/ethernet/sfc/ef10.c | 14 +++++++++++---
drivers/net/ethernet/sfc/efx.c | 11 +++++++++++
drivers/net/ethernet/sfc/efx.h | 3 +++
drivers/net/ethernet/sfc/ethtool.c | 1 -
drivers/net/ethernet/sfc/falcon.c | 9 ++++++++-
drivers/net/ethernet/sfc/net_driver.h | 2 ++
drivers/net/ethernet/sfc/nic.h | 13 ++++++++++---
drivers/net/ethernet/sfc/rx.c | 4 +++-
drivers/net/ethernet/sfc/siena.c | 9 ++++++++-
9 files changed, 56 insertions(+), 10 deletions(-)
diff --git a/drivers/net/ethernet/sfc/ef10.c b/drivers/net/ethernet/sfc/ef10.c
index b5ed30a..002d4cd 100644
--- a/drivers/net/ethernet/sfc/ef10.c
+++ b/drivers/net/ethernet/sfc/ef10.c
@@ -755,6 +755,8 @@ static int efx_ef10_reset(struct efx_nic *efx, enum reset_type reset_type)
{ NULL, 64, 8 * MC_CMD_MAC_ ## mcdi_name }
#define EF10_OTHER_STAT(ext_name) \
[EF10_STAT_ ## ext_name] = { #ext_name, 0, 0 }
+#define GENERIC_SW_STAT(ext_name) \
+ [GENERIC_STAT_ ## ext_name] = { #ext_name, 0, 0 }
static const struct efx_hw_stat_desc efx_ef10_stat_desc[EF10_STAT_COUNT] = {
EF10_DMA_STAT(tx_bytes, TX_BYTES),
@@ -798,6 +800,8 @@ static const struct efx_hw_stat_desc efx_ef10_stat_desc[EF10_STAT_COUNT] = {
EF10_DMA_STAT(rx_align_error, RX_ALIGN_ERROR_PKTS),
EF10_DMA_STAT(rx_length_error, RX_LENGTH_ERROR_PKTS),
EF10_DMA_STAT(rx_nodesc_drops, RX_NODESC_DROPS),
+ GENERIC_SW_STAT(rx_nodesc_trunc),
+ GENERIC_SW_STAT(rx_noskb_drops),
EF10_DMA_STAT(rx_pm_trunc_bb_overflow, PM_TRUNC_BB_OVERFLOW),
EF10_DMA_STAT(rx_pm_discard_bb_overflow, PM_DISCARD_BB_OVERFLOW),
EF10_DMA_STAT(rx_pm_trunc_vfifo_full, PM_TRUNC_VFIFO_FULL),
@@ -841,7 +845,9 @@ static const struct efx_hw_stat_desc efx_ef10_stat_desc[EF10_STAT_COUNT] = {
(1ULL << EF10_STAT_rx_gtjumbo) | \
(1ULL << EF10_STAT_rx_bad_gtjumbo) | \
(1ULL << EF10_STAT_rx_overflow) | \
- (1ULL << EF10_STAT_rx_nodesc_drops))
+ (1ULL << EF10_STAT_rx_nodesc_drops) | \
+ (1ULL << GENERIC_STAT_rx_nodesc_trunc) | \
+ (1ULL << GENERIC_STAT_rx_noskb_drops))
/* These statistics are only provided by the 10G MAC. For a 10G/40G
* switchable port we do not expose these because they might not
@@ -951,7 +957,7 @@ static int efx_ef10_try_update_nic_stats(struct efx_nic *efx)
stats[EF10_STAT_rx_bytes_minus_good_bytes];
efx_update_diff_stat(&stats[EF10_STAT_rx_bad_bytes],
stats[EF10_STAT_rx_bytes_minus_good_bytes]);
-
+ efx_update_sw_stats(efx, stats);
return 0;
}
@@ -990,7 +996,9 @@ static size_t efx_ef10_update_stats(struct efx_nic *efx, u64 *full_stats,
core_stats->tx_packets = stats[EF10_STAT_tx_packets];
core_stats->rx_bytes = stats[EF10_STAT_rx_bytes];
core_stats->tx_bytes = stats[EF10_STAT_tx_bytes];
- core_stats->rx_dropped = stats[EF10_STAT_rx_nodesc_drops];
+ core_stats->rx_dropped = stats[EF10_STAT_rx_nodesc_drops] +
+ stats[GENERIC_STAT_rx_nodesc_trunc] +
+ stats[GENERIC_STAT_rx_noskb_drops];
core_stats->multicast = stats[EF10_STAT_rx_multicast];
core_stats->rx_length_errors =
stats[EF10_STAT_rx_gtjumbo] +
diff --git a/drivers/net/ethernet/sfc/efx.c b/drivers/net/ethernet/sfc/efx.c
index 1e27404..2c7cdfc 100644
--- a/drivers/net/ethernet/sfc/efx.c
+++ b/drivers/net/ethernet/sfc/efx.c
@@ -2722,6 +2722,17 @@ static void efx_fini_struct(struct efx_nic *efx)
}
}
+void efx_update_sw_stats(struct efx_nic *efx, u64 *stats)
+{
+ u64 n_rx_nodesc_trunc = 0;
+ struct efx_channel *channel;
+
+ efx_for_each_channel(channel, efx)
+ n_rx_nodesc_trunc += channel->n_rx_nodesc_trunc;
+ stats[GENERIC_STAT_rx_nodesc_trunc] = n_rx_nodesc_trunc;
+ stats[GENERIC_STAT_rx_noskb_drops] = atomic_read(&efx->n_rx_noskb_drops);
+}
+
/**************************************************************************
*
* PCI interface
diff --git a/drivers/net/ethernet/sfc/efx.h b/drivers/net/ethernet/sfc/efx.h
index 9903258..b41601e 100644
--- a/drivers/net/ethernet/sfc/efx.h
+++ b/drivers/net/ethernet/sfc/efx.h
@@ -199,6 +199,9 @@ void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs,
int efx_port_dummy_op_int(struct efx_nic *efx);
void efx_port_dummy_op_void(struct efx_nic *efx);
+/* Update the generic software stats in the passed stats array */
+void efx_update_sw_stats(struct efx_nic *efx, u64 *stats);
+
/* MTD */
#ifdef CONFIG_SFC_MTD
int efx_mtd_add(struct efx_nic *efx, struct efx_mtd_partition *parts,
diff --git a/drivers/net/ethernet/sfc/ethtool.c b/drivers/net/ethernet/sfc/ethtool.c
index 74739c4..03fe4e7 100644
--- a/drivers/net/ethernet/sfc/ethtool.c
+++ b/drivers/net/ethernet/sfc/ethtool.c
@@ -77,7 +77,6 @@ static const struct efx_sw_stat_desc efx_sw_stat_desc[] = {
EFX_ETHTOOL_UINT_CHANNEL_STAT(rx_tcp_udp_chksum_err),
EFX_ETHTOOL_UINT_CHANNEL_STAT(rx_mcast_mismatch),
EFX_ETHTOOL_UINT_CHANNEL_STAT(rx_frm_trunc),
- EFX_ETHTOOL_UINT_CHANNEL_STAT(rx_nodesc_trunc),
EFX_ETHTOOL_UINT_CHANNEL_STAT(rx_merge_events),
EFX_ETHTOOL_UINT_CHANNEL_STAT(rx_merge_packets),
};
diff --git a/drivers/net/ethernet/sfc/falcon.c b/drivers/net/ethernet/sfc/falcon.c
index fae25a4..1570375 100644
--- a/drivers/net/ethernet/sfc/falcon.c
+++ b/drivers/net/ethernet/sfc/falcon.c
@@ -142,6 +142,8 @@
hw_name ## _ ## offset }
#define FALCON_OTHER_STAT(ext_name) \
[FALCON_STAT_ ## ext_name] = { #ext_name, 0, 0 }
+#define GENERIC_SW_STAT(ext_name) \
+ [GENERIC_STAT_ ## ext_name] = { #ext_name, 0, 0 }
static const struct efx_hw_stat_desc falcon_stat_desc[FALCON_STAT_COUNT] = {
FALCON_DMA_STAT(tx_bytes, XgTxOctets),
@@ -191,6 +193,8 @@ static const struct efx_hw_stat_desc falcon_stat_desc[FALCON_STAT_COUNT] = {
FALCON_DMA_STAT(rx_length_error, XgRxLengthError),
FALCON_DMA_STAT(rx_internal_error, XgRxInternalMACError),
FALCON_OTHER_STAT(rx_nodesc_drop_cnt),
+ GENERIC_SW_STAT(rx_nodesc_trunc),
+ GENERIC_SW_STAT(rx_noskb_drops),
};
static const unsigned long falcon_stat_mask[] = {
[0 ... BITS_TO_LONGS(FALCON_STAT_COUNT) - 1] = ~0UL,
@@ -2574,6 +2578,7 @@ static size_t falcon_update_nic_stats(struct efx_nic *efx, u64 *full_stats,
stats[FALCON_STAT_rx_bytes] -
stats[FALCON_STAT_rx_good_bytes] -
stats[FALCON_STAT_rx_control] * 64);
+ efx_update_sw_stats(efx, stats);
}
if (full_stats)
@@ -2584,7 +2589,9 @@ static size_t falcon_update_nic_stats(struct efx_nic *efx, u64 *full_stats,
core_stats->tx_packets = stats[FALCON_STAT_tx_packets];
core_stats->rx_bytes = stats[FALCON_STAT_rx_bytes];
core_stats->tx_bytes = stats[FALCON_STAT_tx_bytes];
- core_stats->rx_dropped = stats[FALCON_STAT_rx_nodesc_drop_cnt];
+ core_stats->rx_dropped = stats[FALCON_STAT_rx_nodesc_drop_cnt] +
+ stats[GENERIC_STAT_rx_nodesc_trunc] +
+ stats[GENERIC_STAT_rx_noskb_drops];
core_stats->multicast = stats[FALCON_STAT_rx_multicast];
core_stats->rx_length_errors =
stats[FALCON_STAT_rx_gtjumbo] +
diff --git a/drivers/net/ethernet/sfc/net_driver.h b/drivers/net/ethernet/sfc/net_driver.h
index 5bdae8e..8a02d45 100644
--- a/drivers/net/ethernet/sfc/net_driver.h
+++ b/drivers/net/ethernet/sfc/net_driver.h
@@ -777,6 +777,7 @@ struct vfdi_status;
* interrupt has occurred.
* @stats_lock: Statistics update lock. Must be held when calling
* efx_nic_type::{update,start,stop}_stats.
+ * @n_rx_noskb_drops: Count of RX packets dropped due to failure to allocate an skb
*
* This is stored in the private area of the &struct net_device.
*/
@@ -930,6 +931,7 @@ struct efx_nic {
spinlock_t biu_lock;
int last_irq_cpu;
spinlock_t stats_lock;
+ atomic_t n_rx_noskb_drops;
};
static inline int efx_dev_registered(struct efx_nic *efx)
diff --git a/drivers/net/ethernet/sfc/nic.h b/drivers/net/ethernet/sfc/nic.h
index d3ad8ed..60f8514 100644
--- a/drivers/net/ethernet/sfc/nic.h
+++ b/drivers/net/ethernet/sfc/nic.h
@@ -135,6 +135,13 @@ enum {
/* Size and alignment of buffer table entries (same) */
#define EFX_BUF_SIZE EFX_PAGE_SIZE
+/* NIC-generic software stats */
+enum {
+ GENERIC_STAT_rx_noskb_drops,
+ GENERIC_STAT_rx_nodesc_trunc,
+ GENERIC_STAT_COUNT
+};
+
/**
* struct falcon_board_type - board operations and type information
* @id: Board type id, as found in NVRAM
@@ -205,7 +212,7 @@ static inline bool falcon_spi_present(const struct falcon_spi_device *spi)
}
enum {
- FALCON_STAT_tx_bytes,
+ FALCON_STAT_tx_bytes = GENERIC_STAT_COUNT,
FALCON_STAT_tx_packets,
FALCON_STAT_tx_pause,
FALCON_STAT_tx_control,
@@ -290,7 +297,7 @@ static inline struct falcon_board *falcon_board(struct efx_nic *efx)
}
enum {
- SIENA_STAT_tx_bytes,
+ SIENA_STAT_tx_bytes = GENERIC_STAT_COUNT,
SIENA_STAT_tx_good_bytes,
SIENA_STAT_tx_bad_bytes,
SIENA_STAT_tx_packets,
@@ -361,7 +368,7 @@ struct siena_nic_data {
};
enum {
- EF10_STAT_tx_bytes,
+ EF10_STAT_tx_bytes = GENERIC_STAT_COUNT,
EF10_STAT_tx_packets,
EF10_STAT_tx_pause,
EF10_STAT_tx_control,
diff --git a/drivers/net/ethernet/sfc/rx.c b/drivers/net/ethernet/sfc/rx.c
index 48588dd..bf537a2 100644
--- a/drivers/net/ethernet/sfc/rx.c
+++ b/drivers/net/ethernet/sfc/rx.c
@@ -480,8 +480,10 @@ static struct sk_buff *efx_rx_mk_skb(struct efx_channel *channel,
skb = netdev_alloc_skb(efx->net_dev,
efx->rx_ip_align + efx->rx_prefix_size +
hdr_len);
- if (unlikely(skb == NULL))
+ if (unlikely(skb == NULL)) {
+ atomic_inc(&efx->n_rx_noskb_drops);
return NULL;
+ }
EFX_BUG_ON_PARANOID(rx_buf->len < hdr_len);
diff --git a/drivers/net/ethernet/sfc/siena.c b/drivers/net/ethernet/sfc/siena.c
index 50ffefe..ae69685 100644
--- a/drivers/net/ethernet/sfc/siena.c
+++ b/drivers/net/ethernet/sfc/siena.c
@@ -424,6 +424,8 @@ static void siena_remove_nic(struct efx_nic *efx)
{ #ext_name, 64, 8 * MC_CMD_MAC_ ## mcdi_name }
#define SIENA_OTHER_STAT(ext_name) \
[SIENA_STAT_ ## ext_name] = { #ext_name, 0, 0 }
+#define GENERIC_SW_STAT(ext_name) \
+ [GENERIC_STAT_ ## ext_name] = { #ext_name, 0, 0 }
static const struct efx_hw_stat_desc siena_stat_desc[SIENA_STAT_COUNT] = {
SIENA_DMA_STAT(tx_bytes, TX_BYTES),
@@ -483,6 +485,8 @@ static const struct efx_hw_stat_desc siena_stat_desc[SIENA_STAT_COUNT] = {
SIENA_DMA_STAT(rx_length_error, RX_LENGTH_ERROR_PKTS),
SIENA_DMA_STAT(rx_internal_error, RX_INTERNAL_ERROR_PKTS),
SIENA_DMA_STAT(rx_nodesc_drop_cnt, RX_NODESC_DROPS),
+ GENERIC_SW_STAT(rx_nodesc_trunc),
+ GENERIC_SW_STAT(rx_noskb_drops),
};
static const unsigned long siena_stat_mask[] = {
[0 ... BITS_TO_LONGS(SIENA_STAT_COUNT) - 1] = ~0UL,
@@ -528,6 +532,7 @@ static int siena_try_update_nic_stats(struct efx_nic *efx)
efx_update_diff_stat(&stats[SIENA_STAT_rx_good_bytes],
stats[SIENA_STAT_rx_bytes] -
stats[SIENA_STAT_rx_bad_bytes]);
+ efx_update_sw_stats(efx, stats);
return 0;
}
@@ -554,7 +559,9 @@ static size_t siena_update_nic_stats(struct efx_nic *efx, u64 *full_stats,
core_stats->tx_packets = stats[SIENA_STAT_tx_packets];
core_stats->rx_bytes = stats[SIENA_STAT_rx_bytes];
core_stats->tx_bytes = stats[SIENA_STAT_tx_bytes];
- core_stats->rx_dropped = stats[SIENA_STAT_rx_nodesc_drop_cnt];
+ core_stats->rx_dropped = stats[SIENA_STAT_rx_nodesc_drop_cnt] +
+ stats[GENERIC_STAT_rx_nodesc_trunc] +
+ stats[GENERIC_STAT_rx_noskb_drops];
core_stats->multicast = stats[SIENA_STAT_rx_multicast];
core_stats->collisions = stats[SIENA_STAT_tx_collision];
core_stats->rx_length_errors =
--
1.7.11.7
--
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