From 78034f5fdd622520eb843301cf35ce6c626543a7 Mon Sep 17 00:00:00 2001 From: Eugenia Emantayev Date: Wed, 13 Dec 2017 18:12:09 +0200 Subject: [PATCH 1/3] net/mlx4_en: Fix selftest for small MTUs Set the minimal MTU threshold for running loopback selftest. MTU should be big enough to include packet payload, NET_IP_ALIGN, Ethernet headers and preamble length. Fixes: e7c1c2c46201 ("mlx4_en: Added self diagnostics test implementation") Signed-off-by: Eugenia Emantayev Signed-off-by: Tariq Toukan Signed-off-by: David S. Miller --- drivers/net/ethernet/mellanox/mlx4/en_selftest.c | 2 +- drivers/net/ethernet/mellanox/mlx4/mlx4_en.h | 3 +++ 2 files changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/mellanox/mlx4/en_selftest.c b/drivers/net/ethernet/mellanox/mlx4/en_selftest.c index 88699b1819461..946d9db7c8c20 100644 --- a/drivers/net/ethernet/mellanox/mlx4/en_selftest.c +++ b/drivers/net/ethernet/mellanox/mlx4/en_selftest.c @@ -185,7 +185,7 @@ void mlx4_en_ex_selftest(struct net_device *dev, u32 *flags, u64 *buf) if (priv->mdev->dev->caps.flags & MLX4_DEV_CAP_FLAG_UC_LOOPBACK) { buf[3] = mlx4_en_test_registers(priv); - if (priv->port_up) + if (priv->port_up && dev->mtu >= MLX4_SELFTEST_LB_MIN_MTU) buf[4] = mlx4_en_test_loopback(priv); } diff --git a/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h b/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h index 1856e279a7e0a..2b72677eccd48 100644 --- a/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h +++ b/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h @@ -153,6 +153,9 @@ #define SMALL_PACKET_SIZE (256 - NET_IP_ALIGN) #define HEADER_COPY_SIZE (128 - NET_IP_ALIGN) #define MLX4_LOOPBACK_TEST_PAYLOAD (HEADER_COPY_SIZE - ETH_HLEN) +#define PREAMBLE_LEN 8 +#define MLX4_SELFTEST_LB_MIN_MTU (MLX4_LOOPBACK_TEST_PAYLOAD + NET_IP_ALIGN + \ + ETH_HLEN + PREAMBLE_LEN) #define MLX4_EN_MIN_MTU 46 /* VLAN_HLEN is added twice,to support skb vlan tagged with multiple From 0bb9fc4f5429ac970181c073aa32e521e20f7b73 Mon Sep 17 00:00:00 2001 From: Eran Ben Elisha Date: Wed, 13 Dec 2017 18:12:10 +0200 Subject: [PATCH 2/3] net/mlx4_core: Fix wrong calculation of free counters The field res_free indicates the total number of counters which are available for allocation (reserved and unreserved). Fixed a bug where the reserved counters were subtracted from res_free before any allocation was performed. Before this fix, free counters which were not reserved could not be allocated. Fixes: 9de92c60beaa ("net/mlx4_core: Adjust counter grant policy in the resource tracker") Signed-off-by: Eran Ben Elisha Reviewed-by: Jack Morgenstein Signed-off-by: Tariq Toukan Signed-off-by: David S. Miller --- drivers/net/ethernet/mellanox/mlx4/resource_tracker.c | 1 - 1 file changed, 1 deletion(-) diff --git a/drivers/net/ethernet/mellanox/mlx4/resource_tracker.c b/drivers/net/ethernet/mellanox/mlx4/resource_tracker.c index 04304dd894c6c..606a0e0beeae6 100644 --- a/drivers/net/ethernet/mellanox/mlx4/resource_tracker.c +++ b/drivers/net/ethernet/mellanox/mlx4/resource_tracker.c @@ -611,7 +611,6 @@ int mlx4_init_resource_tracker(struct mlx4_dev *dev) MLX4_MAX_PORTS; else res_alloc->guaranteed[t] = 0; - res_alloc->res_free -= res_alloc->guaranteed[t]; break; default: break; From 5a1647c391ba543a77a400dddf89053ec5c2b7a4 Mon Sep 17 00:00:00 2001 From: Eran Ben Elisha Date: Wed, 13 Dec 2017 18:12:11 +0200 Subject: [PATCH 3/3] net/mlx4_en: Fill all counters under one call of stats lock Before this patch, the stats_lock was acquired twice. In between the locks Driver sent command to gather some more statistics (per priority and counter statistics). If the stats lock was acquired by get statistics NDO in between we would have report out of sync counters. Fix this by collecting all stats from Firmware in advance and then fill the Software structs under one lock. Fixes: 0b131561a7d6 ("net/mlx4_en: Add Flow control statistics display via ethtool") Signed-off-by: Eran Ben Elisha Signed-off-by: Tariq Toukan Signed-off-by: David S. Miller --- drivers/net/ethernet/mellanox/mlx4/en_port.c | 57 +++++++++++--------- 1 file changed, 31 insertions(+), 26 deletions(-) diff --git a/drivers/net/ethernet/mellanox/mlx4/en_port.c b/drivers/net/ethernet/mellanox/mlx4/en_port.c index e0eb695318e64..1fa4849a6f560 100644 --- a/drivers/net/ethernet/mellanox/mlx4/en_port.c +++ b/drivers/net/ethernet/mellanox/mlx4/en_port.c @@ -188,7 +188,7 @@ int mlx4_en_DUMP_ETH_STATS(struct mlx4_en_dev *mdev, u8 port, u8 reset) struct net_device *dev = mdev->pndev[port]; struct mlx4_en_priv *priv = netdev_priv(dev); struct net_device_stats *stats = &dev->stats; - struct mlx4_cmd_mailbox *mailbox; + struct mlx4_cmd_mailbox *mailbox, *mailbox_priority; u64 in_mod = reset << 8 | port; int err; int i, counter_index; @@ -198,6 +198,13 @@ int mlx4_en_DUMP_ETH_STATS(struct mlx4_en_dev *mdev, u8 port, u8 reset) mailbox = mlx4_alloc_cmd_mailbox(mdev->dev); if (IS_ERR(mailbox)) return PTR_ERR(mailbox); + + mailbox_priority = mlx4_alloc_cmd_mailbox(mdev->dev); + if (IS_ERR(mailbox_priority)) { + mlx4_free_cmd_mailbox(mdev->dev, mailbox); + return PTR_ERR(mailbox_priority); + } + err = mlx4_cmd_box(mdev->dev, 0, mailbox->dma, in_mod, 0, MLX4_CMD_DUMP_ETH_STATS, MLX4_CMD_TIME_CLASS_B, MLX4_CMD_NATIVE); @@ -206,6 +213,28 @@ int mlx4_en_DUMP_ETH_STATS(struct mlx4_en_dev *mdev, u8 port, u8 reset) mlx4_en_stats = mailbox->buf; + memset(&tmp_counter_stats, 0, sizeof(tmp_counter_stats)); + counter_index = mlx4_get_default_counter_index(mdev->dev, port); + err = mlx4_get_counter_stats(mdev->dev, counter_index, + &tmp_counter_stats, reset); + + /* 0xffs indicates invalid value */ + memset(mailbox_priority->buf, 0xff, + sizeof(*flowstats) * MLX4_NUM_PRIORITIES); + + if (mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_FLOWSTATS_EN) { + memset(mailbox_priority->buf, 0, + sizeof(*flowstats) * MLX4_NUM_PRIORITIES); + err = mlx4_cmd_box(mdev->dev, 0, mailbox_priority->dma, + in_mod | MLX4_DUMP_ETH_STATS_FLOW_CONTROL, + 0, MLX4_CMD_DUMP_ETH_STATS, + MLX4_CMD_TIME_CLASS_B, MLX4_CMD_NATIVE); + if (err) + goto out; + } + + flowstats = mailbox_priority->buf; + spin_lock_bh(&priv->stats_lock); mlx4_en_fold_software_stats(dev); @@ -345,31 +374,6 @@ int mlx4_en_DUMP_ETH_STATS(struct mlx4_en_dev *mdev, u8 port, u8 reset) priv->pkstats.tx_prio[8][0] = be64_to_cpu(mlx4_en_stats->TTOT_novlan); priv->pkstats.tx_prio[8][1] = be64_to_cpu(mlx4_en_stats->TOCT_novlan); - spin_unlock_bh(&priv->stats_lock); - - memset(&tmp_counter_stats, 0, sizeof(tmp_counter_stats)); - counter_index = mlx4_get_default_counter_index(mdev->dev, port); - err = mlx4_get_counter_stats(mdev->dev, counter_index, - &tmp_counter_stats, reset); - - /* 0xffs indicates invalid value */ - memset(mailbox->buf, 0xff, sizeof(*flowstats) * MLX4_NUM_PRIORITIES); - - if (mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_FLOWSTATS_EN) { - memset(mailbox->buf, 0, - sizeof(*flowstats) * MLX4_NUM_PRIORITIES); - err = mlx4_cmd_box(mdev->dev, 0, mailbox->dma, - in_mod | MLX4_DUMP_ETH_STATS_FLOW_CONTROL, - 0, MLX4_CMD_DUMP_ETH_STATS, - MLX4_CMD_TIME_CLASS_B, MLX4_CMD_NATIVE); - if (err) - goto out; - } - - flowstats = mailbox->buf; - - spin_lock_bh(&priv->stats_lock); - if (tmp_counter_stats.counter_mode == 0) { priv->pf_stats.rx_bytes = be64_to_cpu(tmp_counter_stats.rx_bytes); priv->pf_stats.tx_bytes = be64_to_cpu(tmp_counter_stats.tx_bytes); @@ -410,6 +414,7 @@ int mlx4_en_DUMP_ETH_STATS(struct mlx4_en_dev *mdev, u8 port, u8 reset) out: mlx4_free_cmd_mailbox(mdev->dev, mailbox); + mlx4_free_cmd_mailbox(mdev->dev, mailbox_priority); return err; }