From cc7cf5175807daa9cb51f6e0eb034f60ced6b251 Mon Sep 17 00:00:00 2001 From: Ido Schimmel Date: Wed, 6 Apr 2016 17:10:11 +0200 Subject: [PATCH] mlxsw: spectrum: Allow setting maximum rate for a TC Allow a user to set maximum rate for a particular TC using DCB ops. Signed-off-by: Ido Schimmel Signed-off-by: Jiri Pirko Signed-off-by: David S. Miller --- drivers/net/ethernet/mellanox/mlxsw/spectrum.c | 6 +- drivers/net/ethernet/mellanox/mlxsw/spectrum.h | 4 ++ drivers/net/ethernet/mellanox/mlxsw/spectrum_dcb.c | 70 ++++++++++++++++++++++ 3 files changed, 77 insertions(+), 3 deletions(-) diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c index 1498e6a..5f4d44e 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c @@ -1513,9 +1513,9 @@ int mlxsw_sp_port_ets_set(struct mlxsw_sp_port *mlxsw_sp_port, return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(qeec), qeec_pl); } -static int mlxsw_sp_port_ets_maxrate_set(struct mlxsw_sp_port *mlxsw_sp_port, - enum mlxsw_reg_qeec_hr hr, u8 index, - u8 next_index, u32 maxrate) +int mlxsw_sp_port_ets_maxrate_set(struct mlxsw_sp_port *mlxsw_sp_port, + enum mlxsw_reg_qeec_hr hr, u8 index, + u8 next_index, u32 maxrate) { struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp; char qeec_pl[MLXSW_REG_QEEC_LEN]; diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.h b/drivers/net/ethernet/mellanox/mlxsw/spectrum.h index ef02081..9e1e4fe 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.h +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.h @@ -173,6 +173,7 @@ struct mlxsw_sp_port { } vport; struct { struct ieee_ets *ets; + struct ieee_maxrate *maxrate; } dcb; /* 802.1Q bridge VLANs */ unsigned long *active_vlans; @@ -280,6 +281,9 @@ int mlxsw_sp_port_prio_tc_set(struct mlxsw_sp_port *mlxsw_sp_port, u8 switch_prio, u8 tclass); int __mlxsw_sp_port_headroom_set(struct mlxsw_sp_port *mlxsw_sp_port, int mtu, u8 *prio_tc); +int mlxsw_sp_port_ets_maxrate_set(struct mlxsw_sp_port *mlxsw_sp_port, + enum mlxsw_reg_qeec_hr hr, u8 index, + u8 next_index, u32 maxrate); #ifdef CONFIG_MLXSW_SPECTRUM_DCB diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_dcb.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_dcb.c index aa5b73a..257e2d4 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_dcb.c +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_dcb.c @@ -250,9 +250,51 @@ static int mlxsw_sp_dcbnl_ieee_setets(struct net_device *dev, return 0; } +static int mlxsw_sp_dcbnl_ieee_getmaxrate(struct net_device *dev, + struct ieee_maxrate *maxrate) +{ + struct mlxsw_sp_port *mlxsw_sp_port = netdev_priv(dev); + + memcpy(maxrate, mlxsw_sp_port->dcb.maxrate, sizeof(*maxrate)); + + return 0; +} + +static int mlxsw_sp_dcbnl_ieee_setmaxrate(struct net_device *dev, + struct ieee_maxrate *maxrate) +{ + struct mlxsw_sp_port *mlxsw_sp_port = netdev_priv(dev); + struct ieee_maxrate *my_maxrate = mlxsw_sp_port->dcb.maxrate; + int err, i; + + for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) { + err = mlxsw_sp_port_ets_maxrate_set(mlxsw_sp_port, + MLXSW_REG_QEEC_HIERARCY_SUBGROUP, + i, 0, + maxrate->tc_maxrate[i]); + if (err) { + netdev_err(dev, "Failed to set maxrate for TC %d\n", i); + goto err_port_ets_maxrate_set; + } + } + + memcpy(mlxsw_sp_port->dcb.maxrate, maxrate, sizeof(*maxrate)); + + return 0; + +err_port_ets_maxrate_set: + for (i--; i >= 0; i--) + mlxsw_sp_port_ets_maxrate_set(mlxsw_sp_port, + MLXSW_REG_QEEC_HIERARCY_SUBGROUP, + i, 0, my_maxrate->tc_maxrate[i]); + return err; +} + static const struct dcbnl_rtnl_ops mlxsw_sp_dcbnl_ops = { .ieee_getets = mlxsw_sp_dcbnl_ieee_getets, .ieee_setets = mlxsw_sp_dcbnl_ieee_setets, + .ieee_getmaxrate = mlxsw_sp_dcbnl_ieee_getmaxrate, + .ieee_setmaxrate = mlxsw_sp_dcbnl_ieee_setmaxrate, .getdcbx = mlxsw_sp_dcbnl_getdcbx, .setdcbx = mlxsw_sp_dcbnl_setdcbx, @@ -275,6 +317,26 @@ static void mlxsw_sp_port_ets_fini(struct mlxsw_sp_port *mlxsw_sp_port) kfree(mlxsw_sp_port->dcb.ets); } +static int mlxsw_sp_port_maxrate_init(struct mlxsw_sp_port *mlxsw_sp_port) +{ + int i; + + mlxsw_sp_port->dcb.maxrate = kmalloc(sizeof(*mlxsw_sp_port->dcb.maxrate), + GFP_KERNEL); + if (!mlxsw_sp_port->dcb.maxrate) + return -ENOMEM; + + for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) + mlxsw_sp_port->dcb.maxrate->tc_maxrate[i] = MLXSW_REG_QEEC_MAS_DIS; + + return 0; +} + +static void mlxsw_sp_port_maxrate_fini(struct mlxsw_sp_port *mlxsw_sp_port) +{ + kfree(mlxsw_sp_port->dcb.maxrate); +} + int mlxsw_sp_port_dcb_init(struct mlxsw_sp_port *mlxsw_sp_port) { int err; @@ -282,13 +344,21 @@ int mlxsw_sp_port_dcb_init(struct mlxsw_sp_port *mlxsw_sp_port) err = mlxsw_sp_port_ets_init(mlxsw_sp_port); if (err) return err; + err = mlxsw_sp_port_maxrate_init(mlxsw_sp_port); + if (err) + goto err_port_maxrate_init; mlxsw_sp_port->dev->dcbnl_ops = &mlxsw_sp_dcbnl_ops; return 0; + +err_port_maxrate_init: + mlxsw_sp_port_ets_fini(mlxsw_sp_port); + return err; } void mlxsw_sp_port_dcb_fini(struct mlxsw_sp_port *mlxsw_sp_port) { + mlxsw_sp_port_maxrate_fini(mlxsw_sp_port); mlxsw_sp_port_ets_fini(mlxsw_sp_port); } -- 2.7.4