/* * Copyright (c) 2016, Mellanox Technologies. All rights reserved. * * This software is available to you under a choice of one of two * licenses. You may choose to be licensed under the terms of the GNU * General Public License (GPL) Version 2, available from the file * COPYING in the main directory of this source tree, or the * OpenIB.org BSD license below: * * Redistribution and use in source and binary forms, with or * without modification, are permitted provided that the following * conditions are met: * * - Redistributions of source code must retain the above * copyright notice, this list of conditions and the following * disclaimer. * * - Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials * provided with the distribution. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #include #include #include "en.h" #define MLX5E_MAX_PRIORITY 8 #define MLX5E_100MB (100000) #define MLX5E_1GB (1000000) static int mlx5e_dcbnl_ieee_getets(struct net_device *netdev, struct ieee_ets *ets) { struct mlx5e_priv *priv = netdev_priv(netdev); if (!MLX5_CAP_GEN(priv->mdev, ets)) return -ENOTSUPP; memcpy(ets, &priv->params.ets, sizeof(*ets)); return 0; } enum { MLX5E_VENDOR_TC_GROUP_NUM = 7, MLX5E_ETS_TC_GROUP_NUM = 0, }; static void mlx5e_build_tc_group(struct ieee_ets *ets, u8 *tc_group, int max_tc) { bool any_tc_mapped_to_ets = false; int strict_group; int i; for (i = 0; i <= max_tc; i++) if (ets->tc_tsa[i] == IEEE_8021QAZ_TSA_ETS) any_tc_mapped_to_ets = true; strict_group = any_tc_mapped_to_ets ? 1 : 0; for (i = 0; i <= max_tc; i++) { switch (ets->tc_tsa[i]) { case IEEE_8021QAZ_TSA_VENDOR: tc_group[i] = MLX5E_VENDOR_TC_GROUP_NUM; break; case IEEE_8021QAZ_TSA_STRICT: tc_group[i] = strict_group++; break; case IEEE_8021QAZ_TSA_ETS: tc_group[i] = MLX5E_ETS_TC_GROUP_NUM; break; } } } static void mlx5e_build_tc_tx_bw(struct ieee_ets *ets, u8 *tc_tx_bw, u8 *tc_group, int max_tc) { int i; for (i = 0; i <= max_tc; i++) { switch (ets->tc_tsa[i]) { case IEEE_8021QAZ_TSA_VENDOR: tc_tx_bw[i] = MLX5E_MAX_BW_ALLOC; break; case IEEE_8021QAZ_TSA_STRICT: tc_tx_bw[i] = MLX5E_MAX_BW_ALLOC; break; case IEEE_8021QAZ_TSA_ETS: tc_tx_bw[i] = ets->tc_tx_bw[i]; break; } } } int mlx5e_dcbnl_ieee_setets_core(struct mlx5e_priv *priv, struct ieee_ets *ets) { struct mlx5_core_dev *mdev = priv->mdev; u8 tc_tx_bw[IEEE_8021QAZ_MAX_TCS]; u8 tc_group[IEEE_8021QAZ_MAX_TCS]; int max_tc = mlx5_max_tc(mdev); int err; if (!MLX5_CAP_GEN(mdev, ets)) return -ENOTSUPP; mlx5e_build_tc_group(ets, tc_group, max_tc); mlx5e_build_tc_tx_bw(ets, tc_tx_bw, tc_group, max_tc); err = mlx5_set_port_prio_tc(mdev, ets->prio_tc); if (err) return err; err = mlx5_set_port_tc_group(mdev, tc_group); if (err) return err; return mlx5_set_port_tc_bw_alloc(mdev, tc_tx_bw); } static int mlx5e_dbcnl_validate_ets(struct net_device *netdev, struct ieee_ets *ets) { int bw_sum = 0; int i; /* Validate Priority */ for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) { if (ets->prio_tc[i] >= MLX5E_MAX_PRIORITY) { netdev_err(netdev, "Failed to validate ETS: priority value greater than max(%d)\n", MLX5E_MAX_PRIORITY); return -EINVAL; } } /* Validate Bandwidth Sum */ for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) { if (ets->tc_tsa[i] == IEEE_8021QAZ_TSA_ETS) { if (!ets->tc_tx_bw[i]) { netdev_err(netdev, "Failed to validate ETS: BW 0 is illegal\n"); return -EINVAL; } bw_sum += ets->tc_tx_bw[i]; } } if (bw_sum != 0 && bw_sum != 100) { netdev_err(netdev, "Failed to validate ETS: BW sum is illegal\n"); return -EINVAL; } return 0; } static int mlx5e_dcbnl_ieee_setets(struct net_device *netdev, struct ieee_ets *ets) { struct mlx5e_priv *priv = netdev_priv(netdev); int err; err = mlx5e_dbcnl_validate_ets(netdev, ets); if (err) return err; err = mlx5e_dcbnl_ieee_setets_core(priv, ets); if (err) return err; memcpy(&priv->params.ets, ets, sizeof(*ets)); priv->params.ets.ets_cap = mlx5_max_tc(priv->mdev) + 1; return 0; } static int mlx5e_dcbnl_ieee_getpfc(struct net_device *dev, struct ieee_pfc *pfc) { struct mlx5e_priv *priv = netdev_priv(dev); struct mlx5_core_dev *mdev = priv->mdev; struct mlx5e_pport_stats *pstats = &priv->stats.pport; int i; pfc->pfc_cap = mlx5_max_tc(mdev) + 1; for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) { pfc->requests[i] = PPORT_PER_PRIO_GET(pstats, i, tx_pause); pfc->indications[i] = PPORT_PER_PRIO_GET(pstats, i, rx_pause); } return mlx5_query_port_pfc(mdev, &pfc->pfc_en, NULL); } static int mlx5e_dcbnl_ieee_setpfc(struct net_device *dev, struct ieee_pfc *pfc) { struct mlx5e_priv *priv = netdev_priv(dev); struct mlx5_core_dev *mdev = priv->mdev; u8 curr_pfc_en; int ret; mlx5_query_port_pfc(mdev, &curr_pfc_en, NULL); if (pfc->pfc_en == curr_pfc_en) return 0; ret = mlx5_set_port_pfc(mdev, pfc->pfc_en, pfc->pfc_en); mlx5_toggle_port_link(mdev); return ret; } static u8 mlx5e_dcbnl_getdcbx(struct net_device *dev) { return DCB_CAP_DCBX_HOST | DCB_CAP_DCBX_VER_IEEE; } static u8 mlx5e_dcbnl_setdcbx(struct net_device *dev, u8 mode) { if ((mode & DCB_CAP_DCBX_LLD_MANAGED) || (mode & DCB_CAP_DCBX_VER_CEE) || !(mode & DCB_CAP_DCBX_VER_IEEE) || !(mode & DCB_CAP_DCBX_HOST)) return 1; return 0; } static int mlx5e_dcbnl_ieee_getmaxrate(struct net_device *netdev, struct ieee_maxrate *maxrate) { struct mlx5e_priv *priv = netdev_priv(netdev); struct mlx5_core_dev *mdev = priv->mdev; u8 max_bw_value[IEEE_8021QAZ_MAX_TCS]; u8 max_bw_unit[IEEE_8021QAZ_MAX_TCS]; int err; int i; err = mlx5_query_port_ets_rate_limit(mdev, max_bw_value, max_bw_unit); if (err) return err; memset(maxrate->tc_maxrate, 0, sizeof(maxrate->tc_maxrate)); for (i = 0; i <= mlx5_max_tc(mdev); i++) { switch (max_bw_unit[i]) { case MLX5_100_MBPS_UNIT: maxrate->tc_maxrate[i] = max_bw_value[i] * MLX5E_100MB; break; case MLX5_GBPS_UNIT: maxrate->tc_maxrate[i] = max_bw_value[i] * MLX5E_1GB; break; case MLX5_BW_NO_LIMIT: break; default: WARN(true, "non-supported BW unit"); break; } } return 0; } static int mlx5e_dcbnl_ieee_setmaxrate(struct net_device *netdev, struct ieee_maxrate *maxrate) { struct mlx5e_priv *priv = netdev_priv(netdev); struct mlx5_core_dev *mdev = priv->mdev; u8 max_bw_value[IEEE_8021QAZ_MAX_TCS]; u8 max_bw_unit[IEEE_8021QAZ_MAX_TCS]; __u64 upper_limit_mbps = roundup(255 * MLX5E_100MB, MLX5E_1GB); int i; memset(max_bw_value, 0, sizeof(max_bw_value)); memset(max_bw_unit, 0, sizeof(max_bw_unit)); for (i = 0; i <= mlx5_max_tc(mdev); i++) { if (!maxrate->tc_maxrate[i]) { max_bw_unit[i] = MLX5_BW_NO_LIMIT; continue; } if (maxrate->tc_maxrate[i] < upper_limit_mbps) { max_bw_value[i] = div_u64(maxrate->tc_maxrate[i], MLX5E_100MB); max_bw_value[i] = max_bw_value[i] ? max_bw_value[i] : 1; max_bw_unit[i] = MLX5_100_MBPS_UNIT; } else { max_bw_value[i] = div_u64(maxrate->tc_maxrate[i], MLX5E_1GB); max_bw_unit[i] = MLX5_GBPS_UNIT; } } return mlx5_modify_port_ets_rate_limit(mdev, max_bw_value, max_bw_unit); } const struct dcbnl_rtnl_ops mlx5e_dcbnl_ops = { .ieee_getets = mlx5e_dcbnl_ieee_getets, .ieee_setets = mlx5e_dcbnl_ieee_setets, .ieee_getmaxrate = mlx5e_dcbnl_ieee_getmaxrate, .ieee_setmaxrate = mlx5e_dcbnl_ieee_setmaxrate, .ieee_getpfc = mlx5e_dcbnl_ieee_getpfc, .ieee_setpfc = mlx5e_dcbnl_ieee_setpfc, .getdcbx = mlx5e_dcbnl_getdcbx, .setdcbx = mlx5e_dcbnl_setdcbx, };