294 lines
10 KiB
C
294 lines
10 KiB
C
/*
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* AMD 10Gb Ethernet driver
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*
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* This file is available to you under your choice of the following two
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* licenses:
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*
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* License 1: GPLv2
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*
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* Copyright (c) 2014-2016 Advanced Micro Devices, Inc.
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*
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* This file is free software; you may copy, redistribute and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or (at
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* your option) any later version.
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*
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* This file is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* This file incorporates work covered by the following copyright and
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* permission notice:
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* The Synopsys DWC ETHER XGMAC Software Driver and documentation
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* (hereinafter "Software") is an unsupported proprietary work of Synopsys,
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* Inc. unless otherwise expressly agreed to in writing between Synopsys
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* and you.
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*
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* The Software IS NOT an item of Licensed Software or Licensed Product
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* under any End User Software License Agreement or Agreement for Licensed
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* Product with Synopsys or any supplement thereto. Permission is hereby
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* granted, free of charge, to any person obtaining a copy of this software
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* annotated with this license and the Software, to deal in the Software
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* without restriction, including without limitation the rights to use,
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* copy, modify, merge, publish, distribute, sublicense, and/or sell copies
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* of the Software, and to permit persons to whom the Software is furnished
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* to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS"
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* BASIS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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* PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*
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*
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* License 2: Modified BSD
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*
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* Copyright (c) 2014-2016 Advanced Micro Devices, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of Advanced Micro Devices, Inc. nor the
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* names of its contributors may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* This file incorporates work covered by the following copyright and
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* permission notice:
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* The Synopsys DWC ETHER XGMAC Software Driver and documentation
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* (hereinafter "Software") is an unsupported proprietary work of Synopsys,
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* Inc. unless otherwise expressly agreed to in writing between Synopsys
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* and you.
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*
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* The Software IS NOT an item of Licensed Software or Licensed Product
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* under any End User Software License Agreement or Agreement for Licensed
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* Product with Synopsys or any supplement thereto. Permission is hereby
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* granted, free of charge, to any person obtaining a copy of this software
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* annotated with this license and the Software, to deal in the Software
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* without restriction, including without limitation the rights to use,
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* copy, modify, merge, publish, distribute, sublicense, and/or sell copies
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* of the Software, and to permit persons to whom the Software is furnished
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* to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS"
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* BASIS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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* PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <linux/netdevice.h>
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#include <net/dcbnl.h>
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#include "xgbe.h"
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#include "xgbe-common.h"
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static int xgbe_dcb_ieee_getets(struct net_device *netdev,
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struct ieee_ets *ets)
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{
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struct xgbe_prv_data *pdata = netdev_priv(netdev);
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/* Set number of supported traffic classes */
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ets->ets_cap = pdata->hw_feat.tc_cnt;
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if (pdata->ets) {
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ets->cbs = pdata->ets->cbs;
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memcpy(ets->tc_tx_bw, pdata->ets->tc_tx_bw,
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sizeof(ets->tc_tx_bw));
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memcpy(ets->tc_tsa, pdata->ets->tc_tsa,
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sizeof(ets->tc_tsa));
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memcpy(ets->prio_tc, pdata->ets->prio_tc,
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sizeof(ets->prio_tc));
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}
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return 0;
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}
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static int xgbe_dcb_ieee_setets(struct net_device *netdev,
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struct ieee_ets *ets)
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{
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struct xgbe_prv_data *pdata = netdev_priv(netdev);
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unsigned int i, tc_ets, tc_ets_weight;
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u8 max_tc = 0;
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tc_ets = 0;
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tc_ets_weight = 0;
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for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) {
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netif_dbg(pdata, drv, netdev,
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"TC%u: tx_bw=%hhu, rx_bw=%hhu, tsa=%hhu\n", i,
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ets->tc_tx_bw[i], ets->tc_rx_bw[i],
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ets->tc_tsa[i]);
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netif_dbg(pdata, drv, netdev, "PRIO%u: TC=%hhu\n", i,
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ets->prio_tc[i]);
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max_tc = max_t(u8, max_tc, ets->prio_tc[i]);
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if ((ets->tc_tx_bw[i] || ets->tc_tsa[i]))
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max_tc = max_t(u8, max_tc, i);
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switch (ets->tc_tsa[i]) {
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case IEEE_8021QAZ_TSA_STRICT:
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break;
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case IEEE_8021QAZ_TSA_ETS:
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tc_ets = 1;
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tc_ets_weight += ets->tc_tx_bw[i];
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break;
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default:
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netif_err(pdata, drv, netdev,
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"unsupported TSA algorithm (%hhu)\n",
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ets->tc_tsa[i]);
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return -EINVAL;
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}
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}
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/* Check maximum traffic class requested */
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if (max_tc >= pdata->hw_feat.tc_cnt) {
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netif_err(pdata, drv, netdev,
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"exceeded number of supported traffic classes\n");
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return -EINVAL;
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}
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/* Weights must add up to 100% */
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if (tc_ets && (tc_ets_weight != 100)) {
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netif_err(pdata, drv, netdev,
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"sum of ETS algorithm weights is not 100 (%u)\n",
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tc_ets_weight);
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return -EINVAL;
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}
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if (!pdata->ets) {
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pdata->ets = devm_kzalloc(pdata->dev, sizeof(*pdata->ets),
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GFP_KERNEL);
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if (!pdata->ets)
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return -ENOMEM;
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}
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pdata->num_tcs = max_tc + 1;
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memcpy(pdata->ets, ets, sizeof(*pdata->ets));
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pdata->hw_if.config_dcb_tc(pdata);
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return 0;
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}
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static int xgbe_dcb_ieee_getpfc(struct net_device *netdev,
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struct ieee_pfc *pfc)
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{
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struct xgbe_prv_data *pdata = netdev_priv(netdev);
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/* Set number of supported PFC traffic classes */
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pfc->pfc_cap = pdata->hw_feat.tc_cnt;
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if (pdata->pfc) {
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pfc->pfc_en = pdata->pfc->pfc_en;
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pfc->mbc = pdata->pfc->mbc;
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pfc->delay = pdata->pfc->delay;
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}
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return 0;
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}
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static int xgbe_dcb_ieee_setpfc(struct net_device *netdev,
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struct ieee_pfc *pfc)
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{
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struct xgbe_prv_data *pdata = netdev_priv(netdev);
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netif_dbg(pdata, drv, netdev,
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"cap=%hhu, en=%#hhx, mbc=%hhu, delay=%hhu\n",
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pfc->pfc_cap, pfc->pfc_en, pfc->mbc, pfc->delay);
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/* Check PFC for supported number of traffic classes */
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if (pfc->pfc_en & ~((1 << pdata->hw_feat.tc_cnt) - 1)) {
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netif_err(pdata, drv, netdev,
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"PFC requested for unsupported traffic class\n");
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return -EINVAL;
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}
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if (!pdata->pfc) {
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pdata->pfc = devm_kzalloc(pdata->dev, sizeof(*pdata->pfc),
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GFP_KERNEL);
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if (!pdata->pfc)
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return -ENOMEM;
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}
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memcpy(pdata->pfc, pfc, sizeof(*pdata->pfc));
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pdata->hw_if.config_dcb_pfc(pdata);
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return 0;
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}
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static u8 xgbe_dcb_getdcbx(struct net_device *netdev)
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{
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return DCB_CAP_DCBX_HOST | DCB_CAP_DCBX_VER_IEEE;
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}
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static u8 xgbe_dcb_setdcbx(struct net_device *netdev, u8 dcbx)
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{
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struct xgbe_prv_data *pdata = netdev_priv(netdev);
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u8 support = xgbe_dcb_getdcbx(netdev);
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netif_dbg(pdata, drv, netdev, "DCBX=%#hhx\n", dcbx);
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if (dcbx & ~support)
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return 1;
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if ((dcbx & support) != support)
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return 1;
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return 0;
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}
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static const struct dcbnl_rtnl_ops xgbe_dcbnl_ops = {
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/* IEEE 802.1Qaz std */
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.ieee_getets = xgbe_dcb_ieee_getets,
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.ieee_setets = xgbe_dcb_ieee_setets,
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.ieee_getpfc = xgbe_dcb_ieee_getpfc,
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.ieee_setpfc = xgbe_dcb_ieee_setpfc,
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/* DCBX configuration */
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.getdcbx = xgbe_dcb_getdcbx,
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.setdcbx = xgbe_dcb_setdcbx,
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};
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const struct dcbnl_rtnl_ops *xgbe_get_dcbnl_ops(void)
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{
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return &xgbe_dcbnl_ops;
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}
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