FreeBSD/Linux Kernel Cross Reference
sys/dev/axgbe/xgbe-dcb.c

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

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