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
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 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
210 static 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
227 static 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=%hhu, en=%#hhx, mbc=%hhu, delay=%hhu\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
257 static u8 xgbe_dcb_getdcbx(struct net_device *netdev)
258 {
259 return DCB_CAP_DCBX_HOST | DCB_CAP_DCBX_VER_IEEE;
260 }
261
262 static 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
278 static 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
290 const struct dcbnl_rtnl_ops *xgbe_get_dcbnl_ops(void)
291 {
292 return &xgbe_dcbnl_ops;
293 }