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net/mlx5e: Implement DCBNL IEEE max rate
Add support for DCBNL IEEE get/set max rate. Signed-off-by: Tariq Toukan <tariqt@mellanox.com> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -35,6 +35,9 @@
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#define MLX5E_MAX_PRIORITY 8
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#define MLX5E_100MB (100000)
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#define MLX5E_1GB (1000000)
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static int mlx5e_dcbnl_ieee_getets(struct net_device *netdev,
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struct ieee_ets *ets)
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{
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@ -219,9 +222,79 @@ static u8 mlx5e_dcbnl_setdcbx(struct net_device *dev, u8 mode)
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return 0;
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}
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static int mlx5e_dcbnl_ieee_getmaxrate(struct net_device *netdev,
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struct ieee_maxrate *maxrate)
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{
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struct mlx5e_priv *priv = netdev_priv(netdev);
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struct mlx5_core_dev *mdev = priv->mdev;
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u8 max_bw_value[IEEE_8021QAZ_MAX_TCS];
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u8 max_bw_unit[IEEE_8021QAZ_MAX_TCS];
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int err;
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int i;
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err = mlx5_query_port_ets_rate_limit(mdev, max_bw_value, max_bw_unit);
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if (err)
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return err;
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memset(maxrate->tc_maxrate, 0, sizeof(maxrate->tc_maxrate));
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for (i = 0; i <= mlx5_max_tc(mdev); i++) {
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switch (max_bw_unit[i]) {
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case MLX5_100_MBPS_UNIT:
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maxrate->tc_maxrate[i] = max_bw_value[i] * MLX5E_100MB;
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break;
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case MLX5_GBPS_UNIT:
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maxrate->tc_maxrate[i] = max_bw_value[i] * MLX5E_1GB;
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break;
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case MLX5_BW_NO_LIMIT:
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break;
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default:
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WARN(true, "non-supported BW unit");
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break;
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}
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}
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return 0;
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}
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static int mlx5e_dcbnl_ieee_setmaxrate(struct net_device *netdev,
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struct ieee_maxrate *maxrate)
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{
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struct mlx5e_priv *priv = netdev_priv(netdev);
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struct mlx5_core_dev *mdev = priv->mdev;
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u8 max_bw_value[IEEE_8021QAZ_MAX_TCS];
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u8 max_bw_unit[IEEE_8021QAZ_MAX_TCS];
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__u64 upper_limit_mbps = roundup(255 * MLX5E_100MB, MLX5E_1GB);
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int i;
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memset(max_bw_value, 0, sizeof(max_bw_value));
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memset(max_bw_unit, 0, sizeof(max_bw_unit));
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for (i = 0; i <= mlx5_max_tc(mdev); i++) {
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if (!maxrate->tc_maxrate[i]) {
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max_bw_unit[i] = MLX5_BW_NO_LIMIT;
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continue;
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}
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if (maxrate->tc_maxrate[i] < upper_limit_mbps) {
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max_bw_value[i] = div_u64(maxrate->tc_maxrate[i],
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MLX5E_100MB);
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max_bw_value[i] = max_bw_value[i] ? max_bw_value[i] : 1;
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max_bw_unit[i] = MLX5_100_MBPS_UNIT;
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} else {
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max_bw_value[i] = div_u64(maxrate->tc_maxrate[i],
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MLX5E_1GB);
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max_bw_unit[i] = MLX5_GBPS_UNIT;
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}
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}
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return mlx5_modify_port_ets_rate_limit(mdev, max_bw_value, max_bw_unit);
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}
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const struct dcbnl_rtnl_ops mlx5e_dcbnl_ops = {
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.ieee_getets = mlx5e_dcbnl_ieee_getets,
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.ieee_setets = mlx5e_dcbnl_ieee_setets,
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.ieee_getmaxrate = mlx5e_dcbnl_ieee_getmaxrate,
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.ieee_setmaxrate = mlx5e_dcbnl_ieee_setmaxrate,
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.ieee_getpfc = mlx5e_dcbnl_ieee_getpfc,
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.ieee_setpfc = mlx5e_dcbnl_ieee_setpfc,
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.getdcbx = mlx5e_dcbnl_getdcbx,
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@ -450,6 +450,19 @@ static int mlx5_set_port_qetcr_reg(struct mlx5_core_dev *mdev, u32 *in,
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MLX5_REG_QETCR, 0, 1);
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}
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static int mlx5_query_port_qetcr_reg(struct mlx5_core_dev *mdev, u32 *out,
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int outlen)
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{
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u32 in[MLX5_ST_SZ_DW(qtct_reg)];
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if (!MLX5_CAP_GEN(mdev, ets))
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return -ENOTSUPP;
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memset(in, 0, sizeof(in));
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return mlx5_core_access_reg(mdev, in, sizeof(in), out, outlen,
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MLX5_REG_QETCR, 0, 0);
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}
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int mlx5_set_port_tc_group(struct mlx5_core_dev *mdev, u8 *tc_group)
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{
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u32 in[MLX5_ST_SZ_DW(qetc_reg)];
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@ -481,3 +494,55 @@ int mlx5_set_port_tc_bw_alloc(struct mlx5_core_dev *mdev, u8 *tc_bw)
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return mlx5_set_port_qetcr_reg(mdev, in, sizeof(in));
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}
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EXPORT_SYMBOL_GPL(mlx5_set_port_tc_bw_alloc);
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int mlx5_modify_port_ets_rate_limit(struct mlx5_core_dev *mdev,
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u8 *max_bw_value,
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u8 *max_bw_units)
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{
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u32 in[MLX5_ST_SZ_DW(qetc_reg)];
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void *ets_tcn_conf;
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int i;
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memset(in, 0, sizeof(in));
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MLX5_SET(qetc_reg, in, port_number, 1);
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for (i = 0; i <= mlx5_max_tc(mdev); i++) {
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ets_tcn_conf = MLX5_ADDR_OF(qetc_reg, in, tc_configuration[i]);
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MLX5_SET(ets_tcn_config_reg, ets_tcn_conf, r, 1);
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MLX5_SET(ets_tcn_config_reg, ets_tcn_conf, max_bw_units,
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max_bw_units[i]);
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MLX5_SET(ets_tcn_config_reg, ets_tcn_conf, max_bw_value,
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max_bw_value[i]);
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}
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return mlx5_set_port_qetcr_reg(mdev, in, sizeof(in));
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}
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EXPORT_SYMBOL_GPL(mlx5_modify_port_ets_rate_limit);
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int mlx5_query_port_ets_rate_limit(struct mlx5_core_dev *mdev,
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u8 *max_bw_value,
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u8 *max_bw_units)
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{
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u32 out[MLX5_ST_SZ_DW(qetc_reg)];
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void *ets_tcn_conf;
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int err;
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int i;
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err = mlx5_query_port_qetcr_reg(mdev, out, sizeof(out));
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if (err)
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return err;
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for (i = 0; i <= mlx5_max_tc(mdev); i++) {
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ets_tcn_conf = MLX5_ADDR_OF(qetc_reg, out, tc_configuration[i]);
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max_bw_value[i] = MLX5_GET(ets_tcn_config_reg, ets_tcn_conf,
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max_bw_value);
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max_bw_units[i] = MLX5_GET(ets_tcn_config_reg, ets_tcn_conf,
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max_bw_units);
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}
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return 0;
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}
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EXPORT_SYMBOL_GPL(mlx5_query_port_ets_rate_limit);
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@ -350,6 +350,12 @@ enum {
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MLX5_SET_PORT_PKEY_TABLE = 20,
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};
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enum {
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MLX5_BW_NO_LIMIT = 0,
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MLX5_100_MBPS_UNIT = 3,
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MLX5_GBPS_UNIT = 4,
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};
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enum {
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MLX5_MAX_PAGE_SHIFT = 31
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};
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@ -75,5 +75,11 @@ int mlx5_max_tc(struct mlx5_core_dev *mdev);
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int mlx5_set_port_prio_tc(struct mlx5_core_dev *mdev, u8 *prio_tc);
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int mlx5_set_port_tc_group(struct mlx5_core_dev *mdev, u8 *tc_group);
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int mlx5_set_port_tc_bw_alloc(struct mlx5_core_dev *mdev, u8 *tc_bw);
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int mlx5_modify_port_ets_rate_limit(struct mlx5_core_dev *mdev,
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u8 *max_bw_value,
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u8 *max_bw_unit);
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int mlx5_query_port_ets_rate_limit(struct mlx5_core_dev *mdev,
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u8 *max_bw_value,
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u8 *max_bw_unit);
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#endif /* __MLX5_PORT_H__ */
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