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Date: Mon, 18 Sep 2023 18:29:54 -0400
From: "Nabil S. Alramli" <dev@...ramli.com>
To: netdev@...r.kernel.org, saeedm@...dia.com, saeed@...nel.org,
kuba@...nel.org, davem@...emloft.net, tariqt@...dia.com,
linux-kernel@...r.kernel.org, leon@...nel.org
Cc: jdamato@...tly.com, sbhogavilli@...tly.com, nalramli@...tly.com,
"Nabil S. Alramli" <dev@...ramli.com>
Subject: [net-next RFC v2 3/4] mlx5: Implement mlx5e_ethtool_{get,set}_per_queue_coalesce() to support per-queue operations
Implment two new methods, mlx5e_ethtool_get_per_queue_coalesce() and
mlx5e_ethtool_set_per_queue_coalesce() and update global coalescing
request handlers to call into them for an extra level of indirection to
allow support for per-queue operations.
Signed-off-by: Nabil S. Alramli <dev@...ramli.com>
---
.../ethernet/mellanox/mlx5/core/en_ethtool.c | 152 +++++++++++++-----
1 file changed, 112 insertions(+), 40 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c b/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
index 13e5838ff1ee..daa0aa833a42 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
@@ -513,33 +513,55 @@ static int mlx5e_set_channels(struct net_device *dev,
return mlx5e_ethtool_set_channels(priv, ch);
}
-int mlx5e_ethtool_get_coalesce(struct mlx5e_priv *priv,
+static int mlx5e_ethtool_get_per_queue_coalesce(struct mlx5e_priv *priv,
+ int queue,
struct ethtool_coalesce *coal,
struct kernel_ethtool_coalesce *kernel_coal)
{
struct dim_cq_moder *rx_moder, *tx_moder;
+ struct mlx5e_params *params;
if (!MLX5_CAP_GEN(priv->mdev, cq_moderation))
return -EOPNOTSUPP;
- rx_moder = &priv->channels.params.rx_cq_moderation;
+ if (queue != -1 && queue >= priv->channels.num) {
+ netdev_err(priv->netdev, "%s: Invalid queue ID [%d]",
+ __func__, queue);
+ return -EINVAL;
+ }
+
+ if (queue == -1)
+ params = &priv->channels.params;
+ else
+ params = &priv->channels.c[queue]->params;
+
+ rx_moder = ¶ms->rx_cq_moderation;
coal->rx_coalesce_usecs = rx_moder->usec;
coal->rx_max_coalesced_frames = rx_moder->pkts;
- coal->use_adaptive_rx_coalesce = priv->channels.params.rx_dim_enabled;
+ coal->use_adaptive_rx_coalesce = params->rx_dim_enabled;
- tx_moder = &priv->channels.params.tx_cq_moderation;
+ tx_moder = ¶ms->tx_cq_moderation;
coal->tx_coalesce_usecs = tx_moder->usec;
coal->tx_max_coalesced_frames = tx_moder->pkts;
- coal->use_adaptive_tx_coalesce = priv->channels.params.tx_dim_enabled;
+ coal->use_adaptive_tx_coalesce = params->tx_dim_enabled;
- kernel_coal->use_cqe_mode_rx =
- MLX5E_GET_PFLAG(&priv->channels.params, MLX5E_PFLAG_RX_CQE_BASED_MODER);
- kernel_coal->use_cqe_mode_tx =
- MLX5E_GET_PFLAG(&priv->channels.params, MLX5E_PFLAG_TX_CQE_BASED_MODER);
+ if (kernel_coal) {
+ kernel_coal->use_cqe_mode_rx =
+ MLX5E_GET_PFLAG(&priv->channels.params, MLX5E_PFLAG_RX_CQE_BASED_MODER);
+ kernel_coal->use_cqe_mode_tx =
+ MLX5E_GET_PFLAG(&priv->channels.params, MLX5E_PFLAG_TX_CQE_BASED_MODER);
+ }
return 0;
}
+int mlx5e_ethtool_get_coalesce(struct mlx5e_priv *priv,
+ struct ethtool_coalesce *coal,
+ struct kernel_ethtool_coalesce *kernel_coal)
+{
+ return mlx5e_ethtool_get_per_queue_coalesce(priv, -1, coal, kernel_coal);
+}
+
static int mlx5e_get_coalesce(struct net_device *netdev,
struct ethtool_coalesce *coal,
struct kernel_ethtool_coalesce *kernel_coal,
@@ -554,32 +576,55 @@ static int mlx5e_get_coalesce(struct net_device *netdev,
#define MLX5E_MAX_COAL_FRAMES MLX5_MAX_CQ_COUNT
static void
-mlx5e_set_priv_channels_tx_coalesce(struct mlx5e_priv *priv, struct ethtool_coalesce *coal)
+mlx5e_set_priv_channels_tx_coalesce(struct mlx5e_priv *priv,
+ int queue,
+ struct ethtool_coalesce *coal)
{
struct mlx5_core_dev *mdev = priv->mdev;
int tc;
int i;
- for (i = 0; i < priv->channels.num; ++i) {
- struct mlx5e_channel *c = priv->channels.c[i];
+ if (queue == -1) {
+ for (i = 0; i < priv->channels.num; ++i) {
+ struct mlx5e_channel *c = priv->channels.c[i];
+
+ for (tc = 0; tc < c->num_tc; tc++) {
+ mlx5_core_modify_cq_moderation(mdev,
+ &c->sq[tc].cq.mcq,
+ coal->tx_coalesce_usecs,
+ coal->tx_max_coalesced_frames);
+ }
+ }
+ } else {
+ struct mlx5e_channel *c = priv->channels.c[queue];
for (tc = 0; tc < c->num_tc; tc++) {
mlx5_core_modify_cq_moderation(mdev,
- &c->sq[tc].cq.mcq,
- coal->tx_coalesce_usecs,
- coal->tx_max_coalesced_frames);
+ &c->sq[tc].cq.mcq,
+ coal->tx_coalesce_usecs,
+ coal->tx_max_coalesced_frames);
}
}
}
static void
-mlx5e_set_priv_channels_rx_coalesce(struct mlx5e_priv *priv, struct ethtool_coalesce *coal)
+mlx5e_set_priv_channels_rx_coalesce(struct mlx5e_priv *priv,
+ int queue,
+ struct ethtool_coalesce *coal)
{
struct mlx5_core_dev *mdev = priv->mdev;
int i;
- for (i = 0; i < priv->channels.num; ++i) {
- struct mlx5e_channel *c = priv->channels.c[i];
+ if (queue == -1) {
+ for (i = 0; i < priv->channels.num; ++i) {
+ struct mlx5e_channel *c = priv->channels.c[i];
+
+ mlx5_core_modify_cq_moderation(mdev, &c->rq.cq.mcq,
+ coal->rx_coalesce_usecs,
+ coal->rx_max_coalesced_frames);
+ }
+ } else {
+ struct mlx5e_channel *c = priv->channels.c[queue];
mlx5_core_modify_cq_moderation(mdev, &c->rq.cq.mcq,
coal->rx_coalesce_usecs,
@@ -596,15 +641,17 @@ static int cqe_mode_to_period_mode(bool val)
return val ? MLX5_CQ_PERIOD_MODE_START_FROM_CQE : MLX5_CQ_PERIOD_MODE_START_FROM_EQE;
}
-int mlx5e_ethtool_set_coalesce(struct mlx5e_priv *priv,
+static int mlx5e_ethtool_set_per_queue_coalesce(struct mlx5e_priv *priv,
+ int queue,
struct ethtool_coalesce *coal,
struct kernel_ethtool_coalesce *kernel_coal,
struct netlink_ext_ack *extack)
{
struct dim_cq_moder *rx_moder, *tx_moder;
struct mlx5_core_dev *mdev = priv->mdev;
- struct mlx5e_params new_params;
- bool reset_rx, reset_tx;
+ bool reset_rx = false, reset_tx = false;
+ struct mlx5e_params new_params = {0};
+ struct mlx5e_params *old_params;
bool reset = true;
u8 cq_period_mode;
int err = 0;
@@ -626,14 +673,29 @@ int mlx5e_ethtool_set_coalesce(struct mlx5e_priv *priv,
return -ERANGE;
}
- if ((kernel_coal->use_cqe_mode_rx || kernel_coal->use_cqe_mode_tx) &&
- !MLX5_CAP_GEN(priv->mdev, cq_period_start_from_cqe)) {
- NL_SET_ERR_MSG_MOD(extack, "cqe_mode_rx/tx is not supported on this device");
- return -EOPNOTSUPP;
+ if (kernel_coal) {
+ if ((kernel_coal->use_cqe_mode_rx || kernel_coal->use_cqe_mode_tx) &&
+ !MLX5_CAP_GEN(priv->mdev, cq_period_start_from_cqe)) {
+ NL_SET_ERR_MSG_MOD(extack,
+ "cqe_mode_rx/tx is not supported on this device");
+ return -EOPNOTSUPP;
+ }
+ }
+
+ if (queue != -1 && queue >= priv->channels.num) {
+ netdev_err(priv->netdev, "%s: Invalid queue ID [%d]",
+ __func__, queue);
+ return -EINVAL;
}
mutex_lock(&priv->state_lock);
- new_params = priv->channels.params;
+
+ if (queue == -1)
+ old_params = &priv->channels.params;
+ else
+ old_params = &priv->channels.c[queue]->params;
+
+ new_params = *old_params;
rx_moder = &new_params.rx_cq_moderation;
rx_moder->usec = coal->rx_coalesce_usecs;
@@ -645,19 +707,21 @@ int mlx5e_ethtool_set_coalesce(struct mlx5e_priv *priv,
tx_moder->pkts = coal->tx_max_coalesced_frames;
new_params.tx_dim_enabled = !!coal->use_adaptive_tx_coalesce;
- reset_rx = !!coal->use_adaptive_rx_coalesce != priv->channels.params.rx_dim_enabled;
- reset_tx = !!coal->use_adaptive_tx_coalesce != priv->channels.params.tx_dim_enabled;
+ reset_rx = !!coal->use_adaptive_rx_coalesce != old_params->rx_dim_enabled;
+ reset_tx = !!coal->use_adaptive_tx_coalesce != old_params->tx_dim_enabled;
- cq_period_mode = cqe_mode_to_period_mode(kernel_coal->use_cqe_mode_rx);
- if (cq_period_mode != rx_moder->cq_period_mode) {
- mlx5e_set_rx_cq_mode_params(&new_params, cq_period_mode);
- reset_rx = true;
- }
+ if (kernel_coal) {
+ cq_period_mode = cqe_mode_to_period_mode(kernel_coal->use_cqe_mode_rx);
+ if (cq_period_mode != rx_moder->cq_period_mode) {
+ mlx5e_set_rx_cq_mode_params(&new_params, cq_period_mode);
+ reset_rx = true;
+ }
- cq_period_mode = cqe_mode_to_period_mode(kernel_coal->use_cqe_mode_tx);
- if (cq_period_mode != tx_moder->cq_period_mode) {
- mlx5e_set_tx_cq_mode_params(&new_params, cq_period_mode);
- reset_tx = true;
+ cq_period_mode = cqe_mode_to_period_mode(kernel_coal->use_cqe_mode_tx);
+ if (cq_period_mode != tx_moder->cq_period_mode) {
+ mlx5e_set_tx_cq_mode_params(&new_params, cq_period_mode);
+ reset_tx = true;
+ }
}
if (reset_rx) {
@@ -678,18 +742,26 @@ int mlx5e_ethtool_set_coalesce(struct mlx5e_priv *priv,
*/
if (!reset_rx && !reset_tx && test_bit(MLX5E_STATE_OPENED, &priv->state)) {
if (!coal->use_adaptive_rx_coalesce)
- mlx5e_set_priv_channels_rx_coalesce(priv, coal);
+ mlx5e_set_priv_channels_rx_coalesce(priv, queue, coal);
if (!coal->use_adaptive_tx_coalesce)
- mlx5e_set_priv_channels_tx_coalesce(priv, coal);
+ mlx5e_set_priv_channels_tx_coalesce(priv, queue, coal);
reset = false;
}
- err = mlx5e_safe_switch_params(priv, &new_params, NULL, NULL, reset, -1);
+ err = mlx5e_safe_switch_params(priv, &new_params, NULL, NULL, reset, queue);
mutex_unlock(&priv->state_lock);
return err;
}
+int mlx5e_ethtool_set_coalesce(struct mlx5e_priv *priv,
+ struct ethtool_coalesce *coal,
+ struct kernel_ethtool_coalesce *kernel_coal,
+ struct netlink_ext_ack *extack)
+{
+ return mlx5e_ethtool_set_per_queue_coalesce(priv, -1, coal, kernel_coal, extack);
+}
+
static int mlx5e_set_coalesce(struct net_device *netdev,
struct ethtool_coalesce *coal,
struct kernel_ethtool_coalesce *kernel_coal,
--
2.35.1
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