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1/*2 * AMD 10Gb Ethernet driver3 *4 * This file is available to you under your choice of the following two5 * licenses:6 *7 * License 1: GPLv28 *9 * Copyright (c) 2014-2016 Advanced Micro Devices, Inc.10 *11 * This file is free software; you may copy, redistribute and/or modify12 * it under the terms of the GNU General Public License as published by13 * the Free Software Foundation, either version 2 of the License, or (at14 * your option) any later version.15 *16 * This file is distributed in the hope that it will be useful, but17 * WITHOUT ANY WARRANTY; without even the implied warranty of18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU19 * General Public License for more details.20 *21 * You should have received a copy of the GNU General Public License22 * along with this program. If not, see <http://www.gnu.org/licenses/>.23 *24 * This file incorporates work covered by the following copyright and25 * permission notice:26 * The Synopsys DWC ETHER XGMAC Software Driver and documentation27 * (hereinafter "Software") is an unsupported proprietary work of Synopsys,28 * Inc. unless otherwise expressly agreed to in writing between Synopsys29 * and you.30 *31 * The Software IS NOT an item of Licensed Software or Licensed Product32 * under any End User Software License Agreement or Agreement for Licensed33 * Product with Synopsys or any supplement thereto. Permission is hereby34 * granted, free of charge, to any person obtaining a copy of this software35 * annotated with this license and the Software, to deal in the Software36 * without restriction, including without limitation the rights to use,37 * copy, modify, merge, publish, distribute, sublicense, and/or sell copies38 * of the Software, and to permit persons to whom the Software is furnished39 * to do so, subject to the following conditions:40 *41 * The above copyright notice and this permission notice shall be included42 * in all copies or substantial portions of the Software.43 *44 * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS"45 * BASIS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED46 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A47 * PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS48 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR49 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF50 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS51 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN52 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)53 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF54 * THE POSSIBILITY OF SUCH DAMAGE.55 *56 *57 * License 2: Modified BSD58 *59 * Copyright (c) 2014-2016 Advanced Micro Devices, Inc.60 * All rights reserved.61 *62 * Redistribution and use in source and binary forms, with or without63 * modification, are permitted provided that the following conditions are met:64 * * Redistributions of source code must retain the above copyright65 * notice, this list of conditions and the following disclaimer.66 * * Redistributions in binary form must reproduce the above copyright67 * notice, this list of conditions and the following disclaimer in the68 * documentation and/or other materials provided with the distribution.69 * * Neither the name of Advanced Micro Devices, Inc. nor the70 * names of its contributors may be used to endorse or promote products71 * derived from this software without specific prior written permission.72 *73 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"74 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE75 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE76 * ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY77 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES78 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;79 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND80 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT81 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF82 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.83 *84 * This file incorporates work covered by the following copyright and85 * permission notice:86 * The Synopsys DWC ETHER XGMAC Software Driver and documentation87 * (hereinafter "Software") is an unsupported proprietary work of Synopsys,88 * Inc. unless otherwise expressly agreed to in writing between Synopsys89 * and you.90 *91 * The Software IS NOT an item of Licensed Software or Licensed Product92 * under any End User Software License Agreement or Agreement for Licensed93 * Product with Synopsys or any supplement thereto. Permission is hereby94 * granted, free of charge, to any person obtaining a copy of this software95 * annotated with this license and the Software, to deal in the Software96 * without restriction, including without limitation the rights to use,97 * copy, modify, merge, publish, distribute, sublicense, and/or sell copies98 * of the Software, and to permit persons to whom the Software is furnished99 * to do so, subject to the following conditions:100 *101 * The above copyright notice and this permission notice shall be included102 * in all copies or substantial portions of the Software.103 *104 * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS"105 * BASIS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED106 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A107 * PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS108 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR109 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF110 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS111 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN112 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)113 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF114 * THE POSSIBILITY OF SUCH DAMAGE.115 */116 117#include <linux/netdevice.h>118#include <net/dcbnl.h>119 120#include "xgbe.h"121#include "xgbe-common.h"122 123static int xgbe_dcb_ieee_getets(struct net_device *netdev,124 struct ieee_ets *ets)125{126 struct xgbe_prv_data *pdata = netdev_priv(netdev);127 128 /* Set number of supported traffic classes */129 ets->ets_cap = pdata->hw_feat.tc_cnt;130 131 if (pdata->ets) {132 ets->cbs = pdata->ets->cbs;133 memcpy(ets->tc_tx_bw, pdata->ets->tc_tx_bw,134 sizeof(ets->tc_tx_bw));135 memcpy(ets->tc_tsa, pdata->ets->tc_tsa,136 sizeof(ets->tc_tsa));137 memcpy(ets->prio_tc, pdata->ets->prio_tc,138 sizeof(ets->prio_tc));139 }140 141 return 0;142}143 144static int xgbe_dcb_ieee_setets(struct net_device *netdev,145 struct ieee_ets *ets)146{147 struct xgbe_prv_data *pdata = netdev_priv(netdev);148 unsigned int i, tc_ets, tc_ets_weight;149 u8 max_tc = 0;150 151 tc_ets = 0;152 tc_ets_weight = 0;153 for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) {154 netif_dbg(pdata, drv, netdev,155 "TC%u: tx_bw=%hhu, rx_bw=%hhu, tsa=%hhu\n", i,156 ets->tc_tx_bw[i], ets->tc_rx_bw[i],157 ets->tc_tsa[i]);158 netif_dbg(pdata, drv, netdev, "PRIO%u: TC=%hhu\n", i,159 ets->prio_tc[i]);160 161 max_tc = max_t(u8, max_tc, ets->prio_tc[i]);162 if ((ets->tc_tx_bw[i] || ets->tc_tsa[i]))163 max_tc = max_t(u8, max_tc, i);164 165 switch (ets->tc_tsa[i]) {166 case IEEE_8021QAZ_TSA_STRICT:167 break;168 case IEEE_8021QAZ_TSA_ETS:169 tc_ets = 1;170 tc_ets_weight += ets->tc_tx_bw[i];171 break;172 default:173 netif_err(pdata, drv, netdev,174 "unsupported TSA algorithm (%hhu)\n",175 ets->tc_tsa[i]);176 return -EINVAL;177 }178 }179 180 /* Check maximum traffic class requested */181 if (max_tc >= pdata->hw_feat.tc_cnt) {182 netif_err(pdata, drv, netdev,183 "exceeded number of supported traffic classes\n");184 return -EINVAL;185 }186 187 /* Weights must add up to 100% */188 if (tc_ets && (tc_ets_weight != 100)) {189 netif_err(pdata, drv, netdev,190 "sum of ETS algorithm weights is not 100 (%u)\n",191 tc_ets_weight);192 return -EINVAL;193 }194 195 if (!pdata->ets) {196 pdata->ets = devm_kzalloc(pdata->dev, sizeof(*pdata->ets),197 GFP_KERNEL);198 if (!pdata->ets)199 return -ENOMEM;200 }201 202 pdata->num_tcs = max_tc + 1;203 memcpy(pdata->ets, ets, sizeof(*pdata->ets));204 205 pdata->hw_if.config_dcb_tc(pdata);206 207 return 0;208}209 210static int xgbe_dcb_ieee_getpfc(struct net_device *netdev,211 struct ieee_pfc *pfc)212{213 struct xgbe_prv_data *pdata = netdev_priv(netdev);214 215 /* Set number of supported PFC traffic classes */216 pfc->pfc_cap = pdata->hw_feat.tc_cnt;217 218 if (pdata->pfc) {219 pfc->pfc_en = pdata->pfc->pfc_en;220 pfc->mbc = pdata->pfc->mbc;221 pfc->delay = pdata->pfc->delay;222 }223 224 return 0;225}226 227static int xgbe_dcb_ieee_setpfc(struct net_device *netdev,228 struct ieee_pfc *pfc)229{230 struct xgbe_prv_data *pdata = netdev_priv(netdev);231 232 netif_dbg(pdata, drv, netdev,233 "cap=%d, en=%#x, mbc=%d, delay=%d\n",234 pfc->pfc_cap, pfc->pfc_en, pfc->mbc, pfc->delay);235 236 /* Check PFC for supported number of traffic classes */237 if (pfc->pfc_en & ~((1 << pdata->hw_feat.tc_cnt) - 1)) {238 netif_err(pdata, drv, netdev,239 "PFC requested for unsupported traffic class\n");240 return -EINVAL;241 }242 243 if (!pdata->pfc) {244 pdata->pfc = devm_kzalloc(pdata->dev, sizeof(*pdata->pfc),245 GFP_KERNEL);246 if (!pdata->pfc)247 return -ENOMEM;248 }249 250 memcpy(pdata->pfc, pfc, sizeof(*pdata->pfc));251 252 pdata->hw_if.config_dcb_pfc(pdata);253 254 return 0;255}256 257static u8 xgbe_dcb_getdcbx(struct net_device *netdev)258{259 return DCB_CAP_DCBX_HOST | DCB_CAP_DCBX_VER_IEEE;260}261 262static u8 xgbe_dcb_setdcbx(struct net_device *netdev, u8 dcbx)263{264 struct xgbe_prv_data *pdata = netdev_priv(netdev);265 u8 support = xgbe_dcb_getdcbx(netdev);266 267 netif_dbg(pdata, drv, netdev, "DCBX=%#hhx\n", dcbx);268 269 if (dcbx & ~support)270 return 1;271 272 if ((dcbx & support) != support)273 return 1;274 275 return 0;276}277 278static const struct dcbnl_rtnl_ops xgbe_dcbnl_ops = {279 /* IEEE 802.1Qaz std */280 .ieee_getets = xgbe_dcb_ieee_getets,281 .ieee_setets = xgbe_dcb_ieee_setets,282 .ieee_getpfc = xgbe_dcb_ieee_getpfc,283 .ieee_setpfc = xgbe_dcb_ieee_setpfc,284 285 /* DCBX configuration */286 .getdcbx = xgbe_dcb_getdcbx,287 .setdcbx = xgbe_dcb_setdcbx,288};289 290const struct dcbnl_rtnl_ops *xgbe_get_dcbnl_ops(void)291{292 return &xgbe_dcbnl_ops;293}294