[PATCH net-next V5 08/11] net/mlx5_core: Set/Query port MTU commands
From: Amir Vadai <hidden>
Date: 2015-05-28 19:29:40
Subsystem:
mellanox mlx5 ib driver, mellanox mlx5 core vpi driver, networking drivers, the rest · Maintainers:
Leon Romanovsky, Saeed Mahameed, Tariq Toukan, Mark Bloch, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
From: Saeed Mahameed <redacted> Introduce set/Query low level functions to access MTU in hardware. To be used by the netdev. Signed-off-by: Saeed Mahameed <redacted> Signed-off-by: Amir Vadai <redacted> --- drivers/net/ethernet/mellanox/mlx5/core/port.c | 53 ++++++++++++++++++++++++++ include/linux/mlx5/driver.h | 4 ++ 2 files changed, 57 insertions(+)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/port.c b/drivers/net/ethernet/mellanox/mlx5/core/port.c
index 742a6fb..7d3d0f9 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/port.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/port.c@@ -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);
diff --git a/include/linux/mlx5/driver.h b/include/linux/mlx5/driver.h
index 6438444..5173847 100644
--- a/include/linux/mlx5/driver.h
+++ b/include/linux/mlx5/driver.h@@ -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,
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1.9.3