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net/mlx5: Introduce physical port PFC access functions

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Add access functions to set and query a physical port PFC
(Priority Flow Control) parameters.

Signed-off-by: Achiad Shochat <achiad@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Achiad Shochat 2016-02-22 18:17:24 +02:00 committed by David S. Miller
parent ada68c31ba
commit ad909eb064
2 changed files with 45 additions and 0 deletions
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41
drivers/net/ethernet/mellanox/mlx5/core/port.c
View File

@ -364,3 +364,44 @@ int mlx5_query_port_pause(struct mlx5_core_dev *dev,
return 0;
}
EXPORT_SYMBOL_GPL(mlx5_query_port_pause);
int mlx5_set_port_pfc(struct mlx5_core_dev *dev, u8 pfc_en_tx, u8 pfc_en_rx)
{
u32 in[MLX5_ST_SZ_DW(pfcc_reg)];
u32 out[MLX5_ST_SZ_DW(pfcc_reg)];
memset(in, 0, sizeof(in));
MLX5_SET(pfcc_reg, in, local_port, 1);
MLX5_SET(pfcc_reg, in, pfctx, pfc_en_tx);
MLX5_SET(pfcc_reg, in, pfcrx, pfc_en_rx);
MLX5_SET_TO_ONES(pfcc_reg, in, prio_mask_tx);
MLX5_SET_TO_ONES(pfcc_reg, in, prio_mask_rx);
return mlx5_core_access_reg(dev, in, sizeof(in), out,
sizeof(out), MLX5_REG_PFCC, 0, 1);
}
EXPORT_SYMBOL_GPL(mlx5_set_port_pfc);
int mlx5_query_port_pfc(struct mlx5_core_dev *dev, u8 *pfc_en_tx, u8 *pfc_en_rx)
{
u32 in[MLX5_ST_SZ_DW(pfcc_reg)];
u32 out[MLX5_ST_SZ_DW(pfcc_reg)];
int err;
memset(in, 0, sizeof(in));
MLX5_SET(pfcc_reg, in, local_port, 1);
err = mlx5_core_access_reg(dev, in, sizeof(in), out,
sizeof(out), MLX5_REG_PFCC, 0, 0);
if (err)
return err;
if (pfc_en_tx)
*pfc_en_tx = MLX5_GET(pfcc_reg, out, pfctx);
if (pfc_en_rx)
*pfc_en_rx = MLX5_GET(pfcc_reg, out, pfcrx);
return 0;
}
EXPORT_SYMBOL_GPL(mlx5_query_port_pfc);

4
include/linux/mlx5/port.h
View File

@ -66,4 +66,8 @@ int mlx5_set_port_pause(struct mlx5_core_dev *dev, u32 rx_pause, u32 tx_pause);
int mlx5_query_port_pause(struct mlx5_core_dev *dev,
u32 *rx_pause, u32 *tx_pause);
int mlx5_set_port_pfc(struct mlx5_core_dev *dev, u8 pfc_en_tx, u8 pfc_en_rx);
int mlx5_query_port_pfc(struct mlx5_core_dev *dev, u8 *pfc_en_tx,
u8 *pfc_en_rx);
#endif /* __MLX5_PORT_H__ */