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net/mlx4_en: Add ethtool statistics for XDP cases 

XDP statistics are reported in ethtool, in total and per ring,
as follows:
- xdp_drop: the number of packets dropped by xdp.
- xdp_tx: the number of packets forwarded by xdp.
- xdp_tx_full: the number of times an xdp forward failed
	due to a full tx xdp ring.

In addition, all packets that are dropped/forwarded by XDP
are no longer accounted in rx_packets/rx_bytes of the ring,
so that they count traffic that is passed to the stack.

Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tariq Toukan 2016-11-02 17:12:25 +02:00 committed by David S. Miller
parent 67f8b1dcb9
commit 15fca2c8eb
7 changed files with 60 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

25
drivers/net/ethernet/mellanox/mlx4/en_ethtool.c
View File

@ -195,6 +195,10 @@ static const char main_strings[][ETH_GSTRING_LEN] = {
"tx_prio_7_packets", "tx_prio_7_bytes",
"tx_novlan_packets", "tx_novlan_bytes",
/* xdp statistics */
"rx_xdp_drop",
"rx_xdp_tx",
"rx_xdp_tx_full",
};
static const char mlx4_en_test_names[][ETH_GSTRING_LEN]= {
@ -340,7 +344,7 @@ static int mlx4_en_get_sset_count(struct net_device *dev, int sset)
case ETH_SS_STATS:
return bitmap_iterator_count(&it) +
(priv->tx_ring_num[TX] * 2) +
(priv->rx_ring_num * 3);
(priv->rx_ring_num * (3 + NUM_XDP_STATS));
case ETH_SS_TEST:
return MLX4_EN_NUM_SELF_TEST - !(priv->mdev->dev->caps.flags
& MLX4_DEV_CAP_FLAG_UC_LOOPBACK) * 2;
@ -400,6 +404,10 @@ static void mlx4_en_get_ethtool_stats(struct net_device *dev,
if (bitmap_iterator_test(&it))
data[index++] = ((unsigned long *)&priv->pkstats)[i];
for (i = 0; i < NUM_XDP_STATS; i++, bitmap_iterator_inc(&it))
if (bitmap_iterator_test(&it))
data[index++] = ((unsigned long *)&priv->xdp_stats)[i];
for (i = 0; i < priv->tx_ring_num[TX]; i++) {
data[index++] = priv->tx_ring[TX][i]->packets;
data[index++] = priv->tx_ring[TX][i]->bytes;
@ -408,6 +416,9 @@ static void mlx4_en_get_ethtool_stats(struct net_device *dev,
data[index++] = priv->rx_ring[i]->packets;
data[index++] = priv->rx_ring[i]->bytes;
data[index++] = priv->rx_ring[i]->dropped;
data[index++] = priv->rx_ring[i]->xdp_drop;
data[index++] = priv->rx_ring[i]->xdp_tx;
data[index++] = priv->rx_ring[i]->xdp_tx_full;
}
spin_unlock_bh(&priv->stats_lock);
@ -470,6 +481,12 @@ static void mlx4_en_get_strings(struct net_device *dev,
strcpy(data + (index++) * ETH_GSTRING_LEN,
main_strings[strings]);
for (i = 0; i < NUM_XDP_STATS; i++, strings++,
bitmap_iterator_inc(&it))
if (bitmap_iterator_test(&it))
strcpy(data + (index++) * ETH_GSTRING_LEN,
main_strings[strings]);
for (i = 0; i < priv->tx_ring_num[TX]; i++) {
sprintf(data + (index++) * ETH_GSTRING_LEN,
"tx%d_packets", i);
@ -483,6 +500,12 @@ static void mlx4_en_get_strings(struct net_device *dev,
"rx%d_bytes", i);
sprintf(data + (index++) * ETH_GSTRING_LEN,
"rx%d_dropped", i);
sprintf(data + (index++) * ETH_GSTRING_LEN,
"rx%d_xdp_drop", i);
sprintf(data + (index++) * ETH_GSTRING_LEN,
"rx%d_xdp_tx", i);
sprintf(data + (index++) * ETH_GSTRING_LEN,
"rx%d_xdp_tx_full", i);
}
break;
case ETH_SS_PRIV_FLAGS:

4
drivers/net/ethernet/mellanox/mlx4/en_netdev.c
View File

@ -3125,6 +3125,10 @@ void mlx4_en_set_stats_bitmap(struct mlx4_dev *dev,
if (!mlx4_is_slave(dev))
bitmap_set(stats_bitmap->bitmap, last_i, NUM_PKT_STATS);
last_i += NUM_PKT_STATS;
bitmap_set(stats_bitmap->bitmap, last_i, NUM_XDP_STATS);
last_i += NUM_XDP_STATS;
}
int mlx4_en_init_netdev(struct mlx4_en_dev *mdev, int port,

6
drivers/net/ethernet/mellanox/mlx4/en_port.c
View File

@ -179,6 +179,9 @@ int mlx4_en_DUMP_ETH_STATS(struct mlx4_en_dev *mdev, u8 port, u8 reset)
priv->port_stats.rx_chksum_good = 0;
priv->port_stats.rx_chksum_none = 0;
priv->port_stats.rx_chksum_complete = 0;
priv->xdp_stats.rx_xdp_drop = 0;
priv->xdp_stats.rx_xdp_tx = 0;
priv->xdp_stats.rx_xdp_tx_full = 0;
for (i = 0; i < priv->rx_ring_num; i++) {
stats->rx_packets += priv->rx_ring[i]->packets;
stats->rx_bytes += priv->rx_ring[i]->bytes;
@ -186,6 +189,9 @@ int mlx4_en_DUMP_ETH_STATS(struct mlx4_en_dev *mdev, u8 port, u8 reset)
priv->port_stats.rx_chksum_good += priv->rx_ring[i]->csum_ok;
priv->port_stats.rx_chksum_none += priv->rx_ring[i]->csum_none;
priv->port_stats.rx_chksum_complete += priv->rx_ring[i]->csum_complete;
priv->xdp_stats.rx_xdp_drop += priv->rx_ring[i]->xdp_drop;
priv->xdp_stats.rx_xdp_tx += priv->rx_ring[i]->xdp_tx;
priv->xdp_stats.rx_xdp_tx_full += priv->rx_ring[i]->xdp_tx_full;
}
stats->tx_packets = 0;
stats->tx_bytes = 0;

12
drivers/net/ethernet/mellanox/mlx4/en_rx.c
View File

@ -875,8 +875,6 @@ int mlx4_en_process_rx_cq(struct net_device *dev, struct mlx4_en_cq *cq, int bud
*/
length = be32_to_cpu(cqe->byte_cnt);
length -= ring->fcs_del;
ring->bytes += length;
ring->packets++;
l2_tunnel = (dev->hw_enc_features & NETIF_F_RXCSUM) &&
(cqe->vlan_my_qpn & cpu_to_be32(MLX4_CQE_L2_TUNNEL));
@ -902,22 +900,26 @@ int mlx4_en_process_rx_cq(struct net_device *dev, struct mlx4_en_cq *cq, int bud
case XDP_PASS:
break;
case XDP_TX:
if (likely(!mlx4_en_xmit_frame(frags, dev,
if (likely(!mlx4_en_xmit_frame(ring, frags, dev,
length, cq->ring,
&doorbell_pending)))
goto consumed;
goto xdp_drop; /* Drop on xmit failure */
goto xdp_drop_no_cnt; /* Drop on xmit failure */
default:
bpf_warn_invalid_xdp_action(act);
case XDP_ABORTED:
case XDP_DROP:
xdp_drop:
ring->xdp_drop++;
xdp_drop_no_cnt:
if (likely(mlx4_en_rx_recycle(ring, frags)))
goto consumed;
goto next;
}
}
ring->bytes += length;
ring->packets++;
if (likely(dev->features & NETIF_F_RXCSUM)) {
if (cqe->status & cpu_to_be16(MLX4_CQE_STATUS_TCP |
MLX4_CQE_STATUS_UDP)) {

8
drivers/net/ethernet/mellanox/mlx4/en_tx.c
View File

@ -1079,7 +1079,8 @@ netdev_tx_t mlx4_en_xmit(struct sk_buff *skb, struct net_device *dev)
return NETDEV_TX_OK;
}
netdev_tx_t mlx4_en_xmit_frame(struct mlx4_en_rx_alloc *frame,
netdev_tx_t mlx4_en_xmit_frame(struct mlx4_en_rx_ring *rx_ring,
struct mlx4_en_rx_alloc *frame,
struct net_device *dev, unsigned int length,
int tx_ind, int *doorbell_pending)
{
@ -1154,8 +1155,7 @@ netdev_tx_t mlx4_en_xmit_frame(struct mlx4_en_rx_alloc *frame,
((ring->prod & ring->size) ?
cpu_to_be32(MLX4_EN_BIT_DESC_OWN) : 0);
ring->packets++;
ring->bytes += tx_info->nr_bytes;
rx_ring->xdp_tx++;
AVG_PERF_COUNTER(priv->pstats.tx_pktsz_avg, length);
ring->prod += nr_txbb;
@ -1179,7 +1179,7 @@ netdev_tx_t mlx4_en_xmit_frame(struct mlx4_en_rx_alloc *frame,
return NETDEV_TX_OK;
tx_drop_count:
ring->tx_dropped++;
rx_ring->xdp_tx_full++;
tx_drop:
return NETDEV_TX_BUSY;
}

7
drivers/net/ethernet/mellanox/mlx4/mlx4_en.h
View File

@ -350,6 +350,9 @@ struct mlx4_en_rx_ring {
unsigned long csum_ok;
unsigned long csum_none;
unsigned long csum_complete;
unsigned long xdp_drop;
unsigned long xdp_tx;
unsigned long xdp_tx_full;
unsigned long dropped;
int hwtstamp_rx_filter;
cpumask_var_t affinity_mask;
@ -599,6 +602,7 @@ struct mlx4_en_priv {
struct mlx4_en_flow_stats_rx rx_flowstats;
struct mlx4_en_flow_stats_tx tx_flowstats;
struct mlx4_en_port_stats port_stats;
struct mlx4_en_xdp_stats xdp_stats;
struct mlx4_en_stats_bitmap stats_bitmap;
struct list_head mc_list;
struct list_head curr_list;
@ -687,7 +691,8 @@ void mlx4_en_tx_irq(struct mlx4_cq *mcq);
u16 mlx4_en_select_queue(struct net_device *dev, struct sk_buff *skb,
void *accel_priv, select_queue_fallback_t fallback);
netdev_tx_t mlx4_en_xmit(struct sk_buff *skb, struct net_device *dev);
netdev_tx_t mlx4_en_xmit_frame(struct mlx4_en_rx_alloc *frame,
netdev_tx_t mlx4_en_xmit_frame(struct mlx4_en_rx_ring *rx_ring,
struct mlx4_en_rx_alloc *frame,
struct net_device *dev, unsigned int length,
int tx_ind, int *doorbell_pending);
void mlx4_en_xmit_doorbell(struct mlx4_en_tx_ring *ring);

10
drivers/net/ethernet/mellanox/mlx4/mlx4_stats.h
View File

@ -55,6 +55,13 @@ struct mlx4_en_perf_stats {
#define NUM_PERF_COUNTERS 6
};
struct mlx4_en_xdp_stats {
unsigned long rx_xdp_drop;
unsigned long rx_xdp_tx;
unsigned long rx_xdp_tx_full;
#define NUM_XDP_STATS 3
};
#define NUM_MAIN_STATS 21
#define MLX4_NUM_PRIORITIES 8
@ -107,7 +114,8 @@ enum {
};
#define NUM_ALL_STATS (NUM_MAIN_STATS + NUM_PORT_STATS + NUM_PKT_STATS + \
NUM_FLOW_STATS + NUM_PERF_STATS + NUM_PF_STATS)
NUM_FLOW_STATS + NUM_PERF_STATS + NUM_PF_STATS + \
NUM_XDP_STATS)
#define MLX4_FIND_NETDEV_STAT(n) (offsetof(struct net_device_stats, n) / \
sizeof(((struct net_device_stats *)0)->n))