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161 lines
5.4 KiB
161 lines
5.4 KiB
From 0cf024ed12b5e44253c1498cb3265d2874a0c324 Mon Sep 17 00:00:00 2001
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From: Alaa Hleihel <ahleihel@redhat.com>
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Date: Tue, 12 May 2020 10:54:48 -0400
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Subject: [PATCH 176/312] [netdrv] net/mlx5e: Change inline mode correctly when
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changing trust state
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Message-id: <20200512105530.4207-83-ahleihel@redhat.com>
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Patchwork-id: 306954
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Patchwork-instance: patchwork
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O-Subject: [RHEL8.3 BZ 1789382 082/124] net/mlx5e: Change inline mode correctly when changing trust state
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Bugzilla: 1789382
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RH-Acked-by: Tony Camuso <tcamuso@redhat.com>
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RH-Acked-by: Kamal Heib <kheib@redhat.com>
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RH-Acked-by: Jarod Wilson <jarod@redhat.com>
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Bugzilla: http://bugzilla.redhat.com/1789382
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Upstream: v5.7-rc1
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commit 6e0504c69811ae9df7e7e1284950befbe3e6f496
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Author: Maxim Mikityanskiy <maximmi@mellanox.com>
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Date: Thu Nov 14 13:06:16 2019 +0200
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net/mlx5e: Change inline mode correctly when changing trust state
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The current steps that are performed when the trust state changes, if
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the channels are active:
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1. The trust state is changed in hardware.
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2. The new inline mode is calculated.
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3. If the new inline mode is different, the channels are recreated using
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the new inline mode.
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This approach has some issues:
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1. There is a time gap between changing trust state in hardware and
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starting sending enough inline headers (the latter happens after
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recreation of channels). It leads to failed transmissions and error
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CQEs.
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2. If the new channels fail to open, we'll be left with the old ones,
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but the hardware will be configured for the new trust state, so the
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interval when we can see TX errors never ends.
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This patch fixes the issues above by moving the trust state change into
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the preactivate hook that runs during the recreation of the channels
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when no channels are active, so it eliminates the gap of partially
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applied configuration. If the inline mode doesn't change with the change
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of the trust state, the channels won't be recreated, just like before
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this patch.
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Signed-off-by: Maxim Mikityanskiy <maximmi@mellanox.com>
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Reviewed-by: Tariq Toukan <tariqt@mellanox.com>
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Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
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Signed-off-by: Alaa Hleihel <ahleihel@redhat.com>
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Signed-off-by: Frantisek Hrbata <fhrbata@redhat.com>
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---
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drivers/net/ethernet/mellanox/mlx5/core/en_dcbnl.c | 55 +++++++++++++---------
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1 file changed, 33 insertions(+), 22 deletions(-)
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diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_dcbnl.c b/drivers/net/ethernet/mellanox/mlx5/core/en_dcbnl.c
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index 1375f6483a13..47874d34156b 100644
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--- a/drivers/net/ethernet/mellanox/mlx5/core/en_dcbnl.c
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+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_dcbnl.c
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@@ -1098,49 +1098,59 @@ void mlx5e_dcbnl_delete_app(struct mlx5e_priv *priv)
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mlx5e_dcbnl_dscp_app(priv, DELETE);
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}
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-static void mlx5e_trust_update_tx_min_inline_mode(struct mlx5e_priv *priv,
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- struct mlx5e_params *params)
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+static void mlx5e_params_calc_trust_tx_min_inline_mode(struct mlx5_core_dev *mdev,
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+ struct mlx5e_params *params,
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+ u8 trust_state)
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{
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- mlx5_query_min_inline(priv->mdev, ¶ms->tx_min_inline_mode);
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- if (priv->dcbx_dp.trust_state == MLX5_QPTS_TRUST_DSCP &&
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+ mlx5_query_min_inline(mdev, ¶ms->tx_min_inline_mode);
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+ if (trust_state == MLX5_QPTS_TRUST_DSCP &&
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params->tx_min_inline_mode == MLX5_INLINE_MODE_L2)
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params->tx_min_inline_mode = MLX5_INLINE_MODE_IP;
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}
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-static void mlx5e_trust_update_sq_inline_mode(struct mlx5e_priv *priv)
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+static int mlx5e_update_trust_state_hw(struct mlx5e_priv *priv, void *context)
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+{
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+ u8 *trust_state = context;
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+ int err;
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+
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+ err = mlx5_set_trust_state(priv->mdev, *trust_state);
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+ if (err)
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+ return err;
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+ priv->dcbx_dp.trust_state = *trust_state;
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+
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+ return 0;
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+}
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+
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+static int mlx5e_set_trust_state(struct mlx5e_priv *priv, u8 trust_state)
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{
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struct mlx5e_channels new_channels = {};
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+ bool reset_channels = true;
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+ int err = 0;
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mutex_lock(&priv->state_lock);
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new_channels.params = priv->channels.params;
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- mlx5e_trust_update_tx_min_inline_mode(priv, &new_channels.params);
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+ mlx5e_params_calc_trust_tx_min_inline_mode(priv->mdev, &new_channels.params,
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+ trust_state);
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if (!test_bit(MLX5E_STATE_OPENED, &priv->state)) {
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priv->channels.params = new_channels.params;
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- goto out;
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+ reset_channels = false;
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}
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/* Skip if tx_min_inline is the same */
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if (new_channels.params.tx_min_inline_mode ==
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priv->channels.params.tx_min_inline_mode)
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- goto out;
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+ reset_channels = false;
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- mlx5e_safe_switch_channels(priv, &new_channels, NULL, NULL);
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+ if (reset_channels)
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+ err = mlx5e_safe_switch_channels(priv, &new_channels,
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+ mlx5e_update_trust_state_hw,
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+ &trust_state);
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+ else
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+ err = mlx5e_update_trust_state_hw(priv, &trust_state);
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-out:
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mutex_unlock(&priv->state_lock);
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-}
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-
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-static int mlx5e_set_trust_state(struct mlx5e_priv *priv, u8 trust_state)
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-{
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- int err;
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-
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- err = mlx5_set_trust_state(priv->mdev, trust_state);
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- if (err)
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- return err;
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- priv->dcbx_dp.trust_state = trust_state;
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- mlx5e_trust_update_sq_inline_mode(priv);
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return err;
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}
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@@ -1171,7 +1181,8 @@ static int mlx5e_trust_initialize(struct mlx5e_priv *priv)
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if (err)
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return err;
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- mlx5e_trust_update_tx_min_inline_mode(priv, &priv->channels.params);
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+ mlx5e_params_calc_trust_tx_min_inline_mode(priv->mdev, &priv->channels.params,
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+ priv->dcbx_dp.trust_state);
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err = mlx5_query_dscp2prio(priv->mdev, priv->dcbx_dp.dscp2prio);
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if (err)
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--
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2.13.6
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