net/mlx5e: IPoIB, Add support for get_link_ksettings in ethtool

Add support for "ethtool DEVNAME" over ipoib ports,
Display standard port information for IPoIB netdevices using ethtool
For example:
$ ethtool ib2
> Settings for ib2:
        Supported ports: [ ]
        Supported link modes:   Not reported
        Supported pause frame use: No
        Supports auto-negotiation: No
        Advertised link modes:  Not reported
        Advertised pause frame use: No
        Advertised auto-negotiation: No
        Speed: 100000Mb/s
        Duplex: Full
        Port: Other
        PHYAD: 0
        Transceiver: internal
        Auto-negotiation: off
        Link detected: yes

Signed-off-by: Shalom Lagziel <shaloml@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/ipoib/ethtool.c b/drivers/net/ethernet/mellanox/mlx5/core/ipoib/ethtool.c
index b080fabfe8deebed76e22447aadda80fcd943e51..dd49a59854e5f8ec2364ae50d9f7e3111fa3287e 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/ipoib/ethtool.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/ipoib/ethtool.c
@@ -131,17 +131,123 @@ static int mlx5i_flash_device(struct net_device *netdev,
        return mlx5e_ethtool_flash_device(priv, flash);
 }
 
+enum mlx5_ptys_width {
+       MLX5_PTYS_WIDTH_1X      = 1 << 0,
+       MLX5_PTYS_WIDTH_2X      = 1 << 1,
+       MLX5_PTYS_WIDTH_4X      = 1 << 2,
+       MLX5_PTYS_WIDTH_8X      = 1 << 3,
+       MLX5_PTYS_WIDTH_12X     = 1 << 4,
+};
+
+static inline int mlx5_ptys_width_enum_to_int(enum mlx5_ptys_width width)
+{
+       switch (width) {
+       case MLX5_PTYS_WIDTH_1X:  return  1;
+       case MLX5_PTYS_WIDTH_2X:  return  2;
+       case MLX5_PTYS_WIDTH_4X:  return  4;
+       case MLX5_PTYS_WIDTH_8X:  return  8;
+       case MLX5_PTYS_WIDTH_12X: return 12;
+       default:                  return -1;
+       }
+}
+
+enum mlx5_ptys_rate {
+       MLX5_PTYS_RATE_SDR      = 1 << 0,
+       MLX5_PTYS_RATE_DDR      = 1 << 1,
+       MLX5_PTYS_RATE_QDR      = 1 << 2,
+       MLX5_PTYS_RATE_FDR10    = 1 << 3,
+       MLX5_PTYS_RATE_FDR      = 1 << 4,
+       MLX5_PTYS_RATE_EDR      = 1 << 5,
+       MLX5_PTYS_RATE_HDR      = 1 << 6,
+};
+
+static inline int mlx5_ptys_rate_enum_to_int(enum mlx5_ptys_rate rate)
+{
+       switch (rate) {
+       case MLX5_PTYS_RATE_SDR:   return 2500;
+       case MLX5_PTYS_RATE_DDR:   return 5000;
+       case MLX5_PTYS_RATE_QDR:
+       case MLX5_PTYS_RATE_FDR10: return 10000;
+       case MLX5_PTYS_RATE_FDR:   return 14000;
+       case MLX5_PTYS_RATE_EDR:   return 25000;
+       case MLX5_PTYS_RATE_HDR:   return 50000;
+       default:                   return -1;
+       }
+}
+
+static int mlx5i_get_port_settings(struct net_device *netdev,
+                                  u16 *ib_link_width_oper, u16 *ib_proto_oper)
+{
+       struct mlx5e_priv *priv    = mlx5i_epriv(netdev);
+       struct mlx5_core_dev *mdev = priv->mdev;
+       u32 out[MLX5_ST_SZ_DW(ptys_reg)] = {0};
+       int ret;
+
+       ret = mlx5_query_port_ptys(mdev, out, sizeof(out), MLX5_PTYS_IB, 1);
+       if (ret)
+               return ret;
+
+       *ib_link_width_oper = MLX5_GET(ptys_reg, out, ib_link_width_oper);
+       *ib_proto_oper      = MLX5_GET(ptys_reg, out, ib_proto_oper);
+
+       return 0;
+}
+
+static int mlx5i_get_speed_settings(u16 ib_link_width_oper, u16 ib_proto_oper)
+{
+       int rate, width;
+
+       rate = mlx5_ptys_rate_enum_to_int(ib_proto_oper);
+       if (rate < 0)
+               return -EINVAL;
+       width = mlx5_ptys_width_enum_to_int(ib_link_width_oper);
+       if (width < 0)
+               return -EINVAL;
+
+       return rate * width;
+}
+
+static int mlx5i_get_link_ksettings(struct net_device *netdev,
+                                   struct ethtool_link_ksettings *link_ksettings)
+{
+       u16 ib_link_width_oper;
+       u16 ib_proto_oper;
+       int speed, ret;
+
+       ret = mlx5i_get_port_settings(netdev, &ib_link_width_oper, &ib_proto_oper);
+       if (ret)
+               return ret;
+
+       ethtool_link_ksettings_zero_link_mode(link_ksettings, supported);
+       ethtool_link_ksettings_zero_link_mode(link_ksettings, advertising);
+
+       speed = mlx5i_get_speed_settings(ib_link_width_oper, ib_proto_oper);
+       if (speed < 0)
+               return -EINVAL;
+
+       link_ksettings->base.duplex = DUPLEX_FULL;
+       link_ksettings->base.port = PORT_OTHER;
+
+       link_ksettings->base.autoneg = AUTONEG_DISABLE;
+
+       link_ksettings->base.speed = speed;
+
+       return 0;
+}
+
 const struct ethtool_ops mlx5i_ethtool_ops = {
-       .get_drvinfo       = mlx5i_get_drvinfo,
-       .get_strings       = mlx5i_get_strings,
-       .get_sset_count    = mlx5i_get_sset_count,
-       .get_ethtool_stats = mlx5i_get_ethtool_stats,
-       .get_ringparam     = mlx5i_get_ringparam,
-       .set_ringparam     = mlx5i_set_ringparam,
-       .flash_device      = mlx5i_flash_device,
-       .get_channels      = mlx5i_get_channels,
-       .set_channels      = mlx5i_set_channels,
-       .get_coalesce      = mlx5i_get_coalesce,
-       .set_coalesce      = mlx5i_set_coalesce,
-       .get_ts_info       = mlx5i_get_ts_info,
+       .get_drvinfo        = mlx5i_get_drvinfo,
+       .get_strings        = mlx5i_get_strings,
+       .get_sset_count     = mlx5i_get_sset_count,
+       .get_ethtool_stats  = mlx5i_get_ethtool_stats,
+       .get_ringparam      = mlx5i_get_ringparam,
+       .set_ringparam      = mlx5i_set_ringparam,
+       .flash_device       = mlx5i_flash_device,
+       .get_channels       = mlx5i_get_channels,
+       .set_channels       = mlx5i_set_channels,
+       .get_coalesce       = mlx5i_get_coalesce,
+       .set_coalesce       = mlx5i_set_coalesce,
+       .get_ts_info        = mlx5i_get_ts_info,
+       .get_link_ksettings = mlx5i_get_link_ksettings,
+       .get_link           = ethtool_op_get_link,
 };