diff options
author | Iyappan Subramanian <isubramanian@apm.com> | 2016-05-13 23:53:00 (GMT) |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2016-05-14 01:12:06 (GMT) |
commit | 3bb502f83080ad28abdd7404f29aa2fc743b28b5 (patch) | |
tree | c779ca4ce0daff518722ee0b0d96210d6c54855c | |
parent | 1b090a4839f6c74af2dc42872c9e9dc9d7c60a99 (diff) | |
download | linux-3bb502f83080ad28abdd7404f29aa2fc743b28b5.tar.xz |
drivers: net: xgene: fix statistics counters race condition
This patch fixes the race condition on updating the statistics
counters by moving the counters to the ring structure.
Signed-off-by: Iyappan Subramanian <isubramanian@apm.com>
Tested-by: Toan Le <toanle@apm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r-- | drivers/net/ethernet/apm/xgene/xgene_enet_hw.c | 19 | ||||
-rw-r--r-- | drivers/net/ethernet/apm/xgene/xgene_enet_hw.h | 2 | ||||
-rw-r--r-- | drivers/net/ethernet/apm/xgene/xgene_enet_main.c | 41 | ||||
-rw-r--r-- | drivers/net/ethernet/apm/xgene/xgene_enet_main.h | 10 |
4 files changed, 53 insertions, 19 deletions
diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_hw.c b/drivers/net/ethernet/apm/xgene/xgene_enet_hw.c index 39e081a..513d2a6 100644 --- a/drivers/net/ethernet/apm/xgene/xgene_enet_hw.c +++ b/drivers/net/ethernet/apm/xgene/xgene_enet_hw.c @@ -219,27 +219,30 @@ void xgene_enet_parse_error(struct xgene_enet_desc_ring *ring, struct xgene_enet_pdata *pdata, enum xgene_enet_err_code status) { - struct rtnl_link_stats64 *stats = &pdata->stats; - switch (status) { case INGRESS_CRC: - stats->rx_crc_errors++; + ring->rx_crc_errors++; + ring->rx_dropped++; break; case INGRESS_CHECKSUM: case INGRESS_CHECKSUM_COMPUTE: - stats->rx_errors++; + ring->rx_errors++; + ring->rx_dropped++; break; case INGRESS_TRUNC_FRAME: - stats->rx_frame_errors++; + ring->rx_frame_errors++; + ring->rx_dropped++; break; case INGRESS_PKT_LEN: - stats->rx_length_errors++; + ring->rx_length_errors++; + ring->rx_dropped++; break; case INGRESS_PKT_UNDER: - stats->rx_frame_errors++; + ring->rx_frame_errors++; + ring->rx_dropped++; break; case INGRESS_FIFO_OVERRUN: - stats->rx_fifo_errors++; + ring->rx_fifo_errors++; break; default: break; diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_hw.h b/drivers/net/ethernet/apm/xgene/xgene_enet_hw.h index ba7da98..ecfeffe 100644 --- a/drivers/net/ethernet/apm/xgene/xgene_enet_hw.h +++ b/drivers/net/ethernet/apm/xgene/xgene_enet_hw.h @@ -201,6 +201,8 @@ enum xgene_enet_rm { #define USERINFO_LEN 32 #define FPQNUM_POS 32 #define FPQNUM_LEN 12 +#define ELERR_POS 46 +#define ELERR_LEN 2 #define NV_POS 50 #define NV_LEN 1 #define LL_POS 51 diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_main.c b/drivers/net/ethernet/apm/xgene/xgene_enet_main.c index 179277a..fd20088 100644 --- a/drivers/net/ethernet/apm/xgene/xgene_enet_main.c +++ b/drivers/net/ethernet/apm/xgene/xgene_enet_main.c @@ -443,8 +443,8 @@ static netdev_tx_t xgene_enet_start_xmit(struct sk_buff *skb, skb_tx_timestamp(skb); - pdata->stats.tx_packets++; - pdata->stats.tx_bytes += skb->len; + tx_ring->tx_packets++; + tx_ring->tx_bytes += skb->len; pdata->ring_ops->wr_cmd(tx_ring, count); return NETDEV_TX_OK; @@ -483,12 +483,12 @@ static int xgene_enet_rx_frame(struct xgene_enet_desc_ring *rx_ring, skb = buf_pool->rx_skb[skb_index]; /* checking for error */ - status = GET_VAL(LERR, le64_to_cpu(raw_desc->m0)); + status = (GET_VAL(ELERR, le64_to_cpu(raw_desc->m0)) << LERR_LEN) || + GET_VAL(LERR, le64_to_cpu(raw_desc->m0)); if (unlikely(status > 2)) { dev_kfree_skb_any(skb); xgene_enet_parse_error(rx_ring, netdev_priv(rx_ring->ndev), status); - pdata->stats.rx_dropped++; ret = -EIO; goto out; } @@ -506,8 +506,8 @@ static int xgene_enet_rx_frame(struct xgene_enet_desc_ring *rx_ring, xgene_enet_skip_csum(skb); } - pdata->stats.rx_packets++; - pdata->stats.rx_bytes += datalen; + rx_ring->rx_packets++; + rx_ring->rx_bytes += datalen; napi_gro_receive(&rx_ring->napi, skb); out: if (--rx_ring->nbufpool == 0) { @@ -1114,12 +1114,31 @@ static struct rtnl_link_stats64 *xgene_enet_get_stats64( { struct xgene_enet_pdata *pdata = netdev_priv(ndev); struct rtnl_link_stats64 *stats = &pdata->stats; + struct xgene_enet_desc_ring *ring; + int i; + + memset(stats, 0, sizeof(struct rtnl_link_stats64)); + for (i = 0; i < pdata->txq_cnt; i++) { + ring = pdata->tx_ring[i]; + if (ring) { + stats->tx_packets += ring->tx_packets; + stats->tx_bytes += ring->tx_bytes; + } + } - stats->rx_errors += stats->rx_length_errors + - stats->rx_crc_errors + - stats->rx_frame_errors + - stats->rx_fifo_errors; - memcpy(storage, &pdata->stats, sizeof(struct rtnl_link_stats64)); + for (i = 0; i < pdata->rxq_cnt; i++) { + ring = pdata->rx_ring[i]; + if (ring) { + stats->rx_packets += ring->rx_packets; + stats->rx_bytes += ring->rx_bytes; + stats->rx_errors += ring->rx_length_errors + + ring->rx_crc_errors + + ring->rx_frame_errors + + ring->rx_fifo_errors; + stats->rx_dropped += ring->rx_dropped; + } + } + memcpy(storage, stats, sizeof(struct rtnl_link_stats64)); return storage; } diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_main.h b/drivers/net/ethernet/apm/xgene/xgene_enet_main.h index ab16388..9d9cf44 100644 --- a/drivers/net/ethernet/apm/xgene/xgene_enet_main.h +++ b/drivers/net/ethernet/apm/xgene/xgene_enet_main.h @@ -121,6 +121,16 @@ struct xgene_enet_desc_ring { struct xgene_enet_raw_desc16 *raw_desc16; }; __le64 *exp_bufs; + u64 tx_packets; + u64 tx_bytes; + u64 rx_packets; + u64 rx_bytes; + u64 rx_dropped; + u64 rx_errors; + u64 rx_length_errors; + u64 rx_crc_errors; + u64 rx_frame_errors; + u64 rx_fifo_errors; }; struct xgene_mac_ops { |