Commit b4e029da authored by Kamal Heib's avatar Kamal Heib Committed by Saeed Mahameed

net/mlx5e: Reduce memory consumption on kdump kernel

Reduce memory consumption on kdump kernel by decreasing the number of
channels to 1 and the size of RQs and SQs to the minimal values.
Signed-off-by: default avatarKamal Heib <kamalh@mellanox.com>
Signed-off-by: default avatarSaeed Mahameed <saeedm@mellanox.com>
parent 78984898
......@@ -101,6 +101,7 @@
#define MLX5E_LOG_INDIR_RQT_SIZE 0x7
#define MLX5E_INDIR_RQT_SIZE BIT(MLX5E_LOG_INDIR_RQT_SIZE)
#define MLX5E_MIN_NUM_CHANNELS 0x1
#define MLX5E_MAX_NUM_CHANNELS (MLX5E_INDIR_RQT_SIZE >> 1)
#define MLX5E_MAX_NUM_SQS (MLX5E_MAX_NUM_CHANNELS * MLX5E_MAX_NUM_TC)
#define MLX5E_TX_CQ_POLL_BUDGET 128
......@@ -847,12 +848,6 @@ static inline u32 mlx5e_get_wqe_mtt_offset(struct mlx5e_rq *rq, u16 wqe_ix)
return wqe_ix * ALIGN(MLX5_MPWRQ_PAGES_PER_WQE, 8);
}
static inline int mlx5e_get_max_num_channels(struct mlx5_core_dev *mdev)
{
return min_t(int, mdev->priv.eq_table.num_comp_vectors,
MLX5E_MAX_NUM_CHANNELS);
}
extern const struct ethtool_ops mlx5e_ethtool_ops;
#ifdef CONFIG_MLX5_CORE_EN_DCB
extern const struct dcbnl_rtnl_ops mlx5e_dcbnl_ops;
......
......@@ -552,7 +552,7 @@ static void mlx5e_get_channels(struct net_device *dev,
{
struct mlx5e_priv *priv = netdev_priv(dev);
ch->max_combined = mlx5e_get_max_num_channels(priv->mdev);
ch->max_combined = priv->profile->max_nch(priv->mdev);
ch->combined_count = priv->params.num_channels;
}
......@@ -560,7 +560,7 @@ static int mlx5e_set_channels(struct net_device *dev,
struct ethtool_channels *ch)
{
struct mlx5e_priv *priv = netdev_priv(dev);
int ncv = mlx5e_get_max_num_channels(priv->mdev);
int ncv = priv->profile->max_nch(priv->mdev);
unsigned int count = ch->combined_count;
bool arfs_enabled;
bool was_opened;
......
......@@ -31,6 +31,7 @@
*/
#include <net/tc_act/tc_gact.h>
#include <linux/crash_dump.h>
#include <net/pkt_cls.h>
#include <linux/mlx5/fs.h>
#include <net/vxlan.h>
......@@ -83,7 +84,9 @@ static void mlx5e_set_rq_type_params(struct mlx5e_priv *priv, u8 rq_type)
priv->params.rq_wq_type = rq_type;
switch (priv->params.rq_wq_type) {
case MLX5_WQ_TYPE_LINKED_LIST_STRIDING_RQ:
priv->params.log_rq_size = MLX5E_PARAMS_DEFAULT_LOG_RQ_SIZE_MPW;
priv->params.log_rq_size = is_kdump_kernel() ?
MLX5E_PARAMS_MINIMUM_LOG_RQ_SIZE_MPW :
MLX5E_PARAMS_DEFAULT_LOG_RQ_SIZE_MPW;
priv->params.mpwqe_log_stride_sz =
MLX5E_GET_PFLAG(priv, MLX5E_PFLAG_RX_CQE_COMPRESS) ?
MLX5_MPWRQ_LOG_STRIDE_SIZE_CQE_COMPRESS :
......@@ -92,7 +95,9 @@ static void mlx5e_set_rq_type_params(struct mlx5e_priv *priv, u8 rq_type)
priv->params.mpwqe_log_stride_sz;
break;
default: /* MLX5_WQ_TYPE_LINKED_LIST */
priv->params.log_rq_size = MLX5E_PARAMS_DEFAULT_LOG_RQ_SIZE;
priv->params.log_rq_size = is_kdump_kernel() ?
MLX5E_PARAMS_MINIMUM_LOG_RQ_SIZE :
MLX5E_PARAMS_DEFAULT_LOG_RQ_SIZE;
}
priv->params.min_rx_wqes = mlx5_min_rx_wqes(priv->params.rq_wq_type,
BIT(priv->params.log_rq_size));
......@@ -1508,6 +1513,14 @@ static int mlx5e_set_tx_maxrate(struct net_device *dev, int index, u32 rate)
return err;
}
static inline int mlx5e_get_max_num_channels(struct mlx5_core_dev *mdev)
{
return is_kdump_kernel() ?
MLX5E_MIN_NUM_CHANNELS :
min_t(int, mdev->priv.eq_table.num_comp_vectors,
MLX5E_MAX_NUM_CHANNELS);
}
static int mlx5e_open_channel(struct mlx5e_priv *priv, int ix,
struct mlx5e_channel_param *cparam,
struct mlx5e_channel **cp)
......@@ -3491,7 +3504,9 @@ static void mlx5e_build_nic_netdev_priv(struct mlx5_core_dev *mdev,
priv->params.lro_timeout =
mlx5e_choose_lro_timeout(mdev, MLX5E_DEFAULT_LRO_TIMEOUT);
priv->params.log_sq_size = MLX5E_PARAMS_DEFAULT_LOG_SQ_SIZE;
priv->params.log_sq_size = is_kdump_kernel() ?
MLX5E_PARAMS_MINIMUM_LOG_SQ_SIZE :
MLX5E_PARAMS_DEFAULT_LOG_SQ_SIZE;
/* set CQE compression */
priv->params.rx_cqe_compress_def = false;
......
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