1/* 2 * AMD 10Gb Ethernet driver 3 * 4 * This file is available to you under your choice of the following two 5 * licenses: 6 * 7 * License 1: GPLv2 8 * 9 * Copyright (c) 2014-2016 Advanced Micro Devices, Inc. 10 * 11 * This file is free software; you may copy, redistribute and/or modify 12 * it under the terms of the GNU General Public License as published by 13 * the Free Software Foundation, either version 2 of the License, or (at 14 * your option) any later version. 15 * 16 * This file is distributed in the hope that it will be useful, but 17 * WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 19 * General Public License for more details. 20 * 21 * You should have received a copy of the GNU General Public License 22 * along with this program. If not, see <http://www.gnu.org/licenses/>. 23 * 24 * This file incorporates work covered by the following copyright and 25 * permission notice: 26 * The Synopsys DWC ETHER XGMAC Software Driver and documentation 27 * (hereinafter "Software") is an unsupported proprietary work of Synopsys, 28 * Inc. unless otherwise expressly agreed to in writing between Synopsys 29 * and you. 30 * 31 * The Software IS NOT an item of Licensed Software or Licensed Product 32 * under any End User Software License Agreement or Agreement for Licensed 33 * Product with Synopsys or any supplement thereto. Permission is hereby 34 * granted, free of charge, to any person obtaining a copy of this software 35 * annotated with this license and the Software, to deal in the Software 36 * without restriction, including without limitation the rights to use, 37 * copy, modify, merge, publish, distribute, sublicense, and/or sell copies 38 * of the Software, and to permit persons to whom the Software is furnished 39 * to do so, subject to the following conditions: 40 * 41 * The above copyright notice and this permission notice shall be included 42 * 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 LIMITED 46 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 47 * PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS 48 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 49 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 50 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 51 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 52 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 53 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 54 * THE POSSIBILITY OF SUCH DAMAGE. 55 * 56 * 57 * License 2: Modified BSD 58 * 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 without 63 * modification, are permitted provided that the following conditions are met: 64 * * Redistributions of source code must retain the above copyright 65 * notice, this list of conditions and the following disclaimer. 66 * * Redistributions in binary form must reproduce the above copyright 67 * notice, this list of conditions and the following disclaimer in the 68 * documentation and/or other materials provided with the distribution. 69 * * Neither the name of Advanced Micro Devices, Inc. nor the 70 * names of its contributors may be used to endorse or promote products 71 * 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, THE 75 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 76 * ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY 77 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 78 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 79 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 80 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 81 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 82 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 83 * 84 * This file incorporates work covered by the following copyright and 85 * permission notice: 86 * The Synopsys DWC ETHER XGMAC Software Driver and documentation 87 * (hereinafter "Software") is an unsupported proprietary work of Synopsys, 88 * Inc. unless otherwise expressly agreed to in writing between Synopsys 89 * and you. 90 * 91 * The Software IS NOT an item of Licensed Software or Licensed Product 92 * under any End User Software License Agreement or Agreement for Licensed 93 * Product with Synopsys or any supplement thereto. Permission is hereby 94 * granted, free of charge, to any person obtaining a copy of this software 95 * annotated with this license and the Software, to deal in the Software 96 * without restriction, including without limitation the rights to use, 97 * copy, modify, merge, publish, distribute, sublicense, and/or sell copies 98 * of the Software, and to permit persons to whom the Software is furnished 99 * to do so, subject to the following conditions: 100 * 101 * The above copyright notice and this permission notice shall be included 102 * 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 LIMITED 106 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 107 * PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS 108 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 109 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 110 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 111 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 112 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 113 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 114 * 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