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net/mlx5_core: Set/Query port MTU commands 

Introduce set/Query low level functions to access MTU in hardware. To be
used by the netdev.

Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Amir Vadai <amirv@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Saeed Mahameed 2015-05-28 22:28:45 +03:00 committed by David S. Miller
parent 90b3e38d04
commit e725440e75
2 changed files with 57 additions and 0 deletions
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53
drivers/net/ethernet/mellanox/mlx5/core/port.c
View File

@ -211,3 +211,56 @@ int mlx5_query_port_status(struct mlx5_core_dev *dev, u8 *status)
*status = MLX5_GET(paos_reg, out, oper_status);
return err;
}
static int mlx5_query_port_mtu(struct mlx5_core_dev *dev,
int *admin_mtu, int *max_mtu, int *oper_mtu)
{
u32 in[MLX5_ST_SZ_DW(pmtu_reg)];
u32 out[MLX5_ST_SZ_DW(pmtu_reg)];
int err;
memset(in, 0, sizeof(in));
MLX5_SET(pmtu_reg, in, local_port, 1);
err = mlx5_core_access_reg(dev, in, sizeof(in), out,
sizeof(out), MLX5_REG_PMTU, 0, 0);
if (err)
return err;
if (max_mtu)
*max_mtu = MLX5_GET(pmtu_reg, out, max_mtu);
if (oper_mtu)
*oper_mtu = MLX5_GET(pmtu_reg, out, oper_mtu);
if (admin_mtu)
*admin_mtu = MLX5_GET(pmtu_reg, out, admin_mtu);
return 0;
}
int mlx5_set_port_mtu(struct mlx5_core_dev *dev, int mtu)
{
u32 in[MLX5_ST_SZ_DW(pmtu_reg)];
u32 out[MLX5_ST_SZ_DW(pmtu_reg)];
memset(in, 0, sizeof(in));
MLX5_SET(pmtu_reg, in, admin_mtu, mtu);
MLX5_SET(pmtu_reg, in, local_port, 1);
return mlx5_core_access_reg(dev, in, sizeof(in), out, sizeof(out),
MLX5_REG_PMTU, 0, 1);
}
EXPORT_SYMBOL_GPL(mlx5_set_port_mtu);
int mlx5_query_port_max_mtu(struct mlx5_core_dev *dev, int *max_mtu)
{
return mlx5_query_port_mtu(dev, NULL, max_mtu, NULL);
}
EXPORT_SYMBOL_GPL(mlx5_query_port_max_mtu);
int mlx5_query_port_oper_mtu(struct mlx5_core_dev *dev, int *oper_mtu)
{
return mlx5_query_port_mtu(dev, NULL, NULL, oper_mtu);
}
EXPORT_SYMBOL_GPL(mlx5_query_port_oper_mtu);

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

@ -710,6 +710,10 @@ int mlx5_set_port_status(struct mlx5_core_dev *dev,
enum mlx5_port_status status);
int mlx5_query_port_status(struct mlx5_core_dev *dev, u8 *status);
int mlx5_set_port_mtu(struct mlx5_core_dev *dev, int mtu);
int mlx5_query_port_max_mtu(struct mlx5_core_dev *dev, int *max_mtu);
int mlx5_query_port_oper_mtu(struct mlx5_core_dev *dev, int *oper_mtu);
int mlx5_debug_eq_add(struct mlx5_core_dev *dev, struct mlx5_eq *eq);
void mlx5_debug_eq_remove(struct mlx5_core_dev *dev, struct mlx5_eq *eq);
int mlx5_core_eq_query(struct mlx5_core_dev *dev, struct mlx5_eq *eq,