From mboxrd@z Thu Jan 1 00:00:00 1970 From: Or Gerlitz Subject: [PATCH net 2/2] net/mlx4_en: Fix HW timestamp init issue upon system startup Date: Thu, 17 Dec 2015 15:35:38 +0200 Message-ID: <1450359338-32220-3-git-send-email-ogerlitz@mellanox.com> References: <1450359338-32220-1-git-send-email-ogerlitz@mellanox.com> Cc: netdev@vger.kernel.org, Eugenia Emantayev , Marina Varshaver , Eran Ben Elisha , Or Gerlitz To: "David S. Miller" Return-path: Received: from [193.47.165.129] ([193.47.165.129]:36160 "EHLO mellanox.co.il" rhost-flags-FAIL-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1753462AbbLQNgG (ORCPT ); Thu, 17 Dec 2015 08:36:06 -0500 In-Reply-To: <1450359338-32220-1-git-send-email-ogerlitz@mellanox.com> Sender: netdev-owner@vger.kernel.org List-ID: From: Eugenia Emantayev mlx4_en_init_timestamp was called before creation of netdev and port init, thus used uninitialized values. Specifically - NIC frequency was incorrect causing wrong calculations and later wrong HW timestamps. Fixes: 1ec4864b1017 ('net/mlx4_en: Fixed crash when port type is changed') Signed-off-by: Eugenia Emantayev Signed-off-by: Marina Varshaver Signed-off-by: Eran Ben Elisha Signed-off-by: Or Gerlitz --- drivers/net/ethernet/mellanox/mlx4/en_clock.c | 7 +++++++ drivers/net/ethernet/mellanox/mlx4/en_main.c | 7 ------- drivers/net/ethernet/mellanox/mlx4/en_netdev.c | 7 +++++++ 3 files changed, 14 insertions(+), 7 deletions(-) diff --git a/drivers/net/ethernet/mellanox/mlx4/en_clock.c b/drivers/net/ethernet/mellanox/mlx4/en_clock.c index 8a083d7..038f9ce 100644 --- a/drivers/net/ethernet/mellanox/mlx4/en_clock.c +++ b/drivers/net/ethernet/mellanox/mlx4/en_clock.c @@ -242,6 +242,13 @@ void mlx4_en_init_timestamp(struct mlx4_en_dev *mdev) unsigned long flags; u64 ns, zero = 0; + /* mlx4_en_init_timestamp is called for each netdev. + * mdev->ptp_clock is common for all ports, skip initialization if + * was done for other port. + */ + if (mdev->ptp_clock) + return; + rwlock_init(&mdev->clock_lock); memset(&mdev->cycles, 0, sizeof(mdev->cycles)); diff --git a/drivers/net/ethernet/mellanox/mlx4/en_main.c b/drivers/net/ethernet/mellanox/mlx4/en_main.c index 005f910..e0ec280 100644 --- a/drivers/net/ethernet/mellanox/mlx4/en_main.c +++ b/drivers/net/ethernet/mellanox/mlx4/en_main.c @@ -232,9 +232,6 @@ static void mlx4_en_remove(struct mlx4_dev *dev, void *endev_ptr) if (mdev->pndev[i]) mlx4_en_destroy_netdev(mdev->pndev[i]); - if (mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_TS) - mlx4_en_remove_timestamp(mdev); - flush_workqueue(mdev->workqueue); destroy_workqueue(mdev->workqueue); (void) mlx4_mr_free(dev, &mdev->mr); @@ -320,10 +317,6 @@ static void *mlx4_en_add(struct mlx4_dev *dev) mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) mdev->port_cnt++; - /* Initialize time stamp mechanism */ - if (mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_TS) - mlx4_en_init_timestamp(mdev); - /* Set default number of RX rings*/ mlx4_en_set_num_rx_rings(mdev); diff --git a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c index 4eef316..7869f97 100644 --- a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c +++ b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c @@ -2072,6 +2072,9 @@ void mlx4_en_destroy_netdev(struct net_device *dev) /* flush any pending task for this netdev */ flush_workqueue(mdev->workqueue); + if (mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_TS) + mlx4_en_remove_timestamp(mdev); + /* Detach the netdev so tasks would not attempt to access it */ mutex_lock(&mdev->state_lock); mdev->pndev[priv->port] = NULL; @@ -3058,6 +3061,10 @@ int mlx4_en_init_netdev(struct mlx4_en_dev *mdev, int port, } queue_delayed_work(mdev->workqueue, &priv->stats_task, STATS_DELAY); + /* Initialize time stamp mechanism */ + if (mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_TS) + mlx4_en_init_timestamp(mdev); + queue_delayed_work(mdev->workqueue, &priv->service_task, SERVICE_TASK_DELAY); -- 2.3.7