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 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 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" 122 123 static 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 } 143 144 static 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; 149 150 tc_ets = 0; 151 tc_ets_weight = 0; 152 for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) { 153 netif_dbg(pdata, drv, netdev, 154 "TC%u: tx_bw=%hhu, rx_bw=%hhu, tsa=%hhu\n", i, 155 ets->tc_tx_bw[i], ets->tc_rx_bw[i], 156 ets->tc_tsa[i]); 157 netif_dbg(pdata, drv, netdev, "PRIO%u: TC=%hhu\n", i, 158 ets->prio_tc[i]); 159 160 if ((ets->tc_tx_bw[i] || ets->tc_tsa[i]) && 161 (i >= pdata->hw_feat.tc_cnt)) 162 return -EINVAL; 163 164 if (ets->prio_tc[i] >= pdata->hw_feat.tc_cnt) 165 return -EINVAL; 166 167 switch (ets->tc_tsa[i]) { 168 case IEEE_8021QAZ_TSA_STRICT: 169 break; 170 case IEEE_8021QAZ_TSA_ETS: 171 tc_ets = 1; 172 tc_ets_weight += ets->tc_tx_bw[i]; 173 break; 174 175 default: 176 return -EINVAL; 177 } 178 } 179 180 /* Weights must add up to 100% */ 181 if (tc_ets && (tc_ets_weight != 100)) 182 return -EINVAL; 183 184 if (!pdata->ets) { 185 pdata->ets = devm_kzalloc(pdata->dev, sizeof(*pdata->ets), 186 GFP_KERNEL); 187 if (!pdata->ets) 188 return -ENOMEM; 189 } 190 191 memcpy(pdata->ets, ets, sizeof(*pdata->ets)); 192 193 pdata->hw_if.config_dcb_tc(pdata); 194 195 return 0; 196 } 197 198 static int xgbe_dcb_ieee_getpfc(struct net_device *netdev, 199 struct ieee_pfc *pfc) 200 { 201 struct xgbe_prv_data *pdata = netdev_priv(netdev); 202 203 /* Set number of supported PFC traffic classes */ 204 pfc->pfc_cap = pdata->hw_feat.tc_cnt; 205 206 if (pdata->pfc) { 207 pfc->pfc_en = pdata->pfc->pfc_en; 208 pfc->mbc = pdata->pfc->mbc; 209 pfc->delay = pdata->pfc->delay; 210 } 211 212 return 0; 213 } 214 215 static int xgbe_dcb_ieee_setpfc(struct net_device *netdev, 216 struct ieee_pfc *pfc) 217 { 218 struct xgbe_prv_data *pdata = netdev_priv(netdev); 219 220 netif_dbg(pdata, drv, netdev, 221 "cap=%hhu, en=%#hhx, mbc=%hhu, delay=%hhu\n", 222 pfc->pfc_cap, pfc->pfc_en, pfc->mbc, pfc->delay); 223 224 if (!pdata->pfc) { 225 pdata->pfc = devm_kzalloc(pdata->dev, sizeof(*pdata->pfc), 226 GFP_KERNEL); 227 if (!pdata->pfc) 228 return -ENOMEM; 229 } 230 231 memcpy(pdata->pfc, pfc, sizeof(*pdata->pfc)); 232 233 pdata->hw_if.config_dcb_pfc(pdata); 234 235 return 0; 236 } 237 238 static u8 xgbe_dcb_getdcbx(struct net_device *netdev) 239 { 240 return DCB_CAP_DCBX_HOST | DCB_CAP_DCBX_VER_IEEE; 241 } 242 243 static u8 xgbe_dcb_setdcbx(struct net_device *netdev, u8 dcbx) 244 { 245 struct xgbe_prv_data *pdata = netdev_priv(netdev); 246 u8 support = xgbe_dcb_getdcbx(netdev); 247 248 netif_dbg(pdata, drv, netdev, "DCBX=%#hhx\n", dcbx); 249 250 if (dcbx & ~support) 251 return 1; 252 253 if ((dcbx & support) != support) 254 return 1; 255 256 return 0; 257 } 258 259 static const struct dcbnl_rtnl_ops xgbe_dcbnl_ops = { 260 /* IEEE 802.1Qaz std */ 261 .ieee_getets = xgbe_dcb_ieee_getets, 262 .ieee_setets = xgbe_dcb_ieee_setets, 263 .ieee_getpfc = xgbe_dcb_ieee_getpfc, 264 .ieee_setpfc = xgbe_dcb_ieee_setpfc, 265 266 /* DCBX configuration */ 267 .getdcbx = xgbe_dcb_getdcbx, 268 .setdcbx = xgbe_dcb_setdcbx, 269 }; 270 271 const struct dcbnl_rtnl_ops *xgbe_get_dcbnl_ops(void) 272 { 273 return &xgbe_dcbnl_ops; 274 } 275