/*
* 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 <linux/netdevice.h>
#include <net/dcbnl.h>
#include "xgbe.h"
#include "xgbe-common.h"
static int xgbe_dcb_ieee_getets(struct net_device *netdev,
struct ieee_ets *ets)
{
struct xgbe_prv_data *pdata = netdev_priv(netdev);
/* 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 net_device *netdev,
struct ieee_ets *ets)
{
struct xgbe_prv_data *pdata = netdev_priv(netdev);
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++) {
netif_dbg(pdata, drv, netdev,
"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]);
netif_dbg(pdata, drv, netdev, "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:
netif_err(pdata, drv, netdev,
"unsupported TSA algorithm (%hhu)\n",
ets->tc_tsa[i]);
return -EINVAL;
}
}
/* Check maximum traffic class requested */
if (max_tc >= pdata->hw_feat.tc_cnt) {
netif_err(pdata, drv, netdev,
"exceeded number of supported traffic classes\n");
return -EINVAL;
}
/* Weights must add up to 100% */
if (tc_ets && (tc_ets_weight != 100)) {
netif_err(pdata, drv, netdev,
"sum of ETS algorithm weights is not 100 (%u)\n",
tc_ets_weight);
return -EINVAL;
}
if (!pdata->ets) {
pdata->ets = devm_kzalloc(pdata->dev, sizeof(*pdata->ets),
GFP_KERNEL);
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 net_device *netdev,
struct ieee_pfc *pfc)
{
struct xgbe_prv_data *pdata = netdev_priv(netdev);
/* 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 net_device *netdev,
struct ieee_pfc *pfc)
{
struct xgbe_prv_data *pdata = netdev_priv(netdev);
netif_dbg(pdata, drv, netdev,
"cap=%hhu, en=%#hhx, mbc=%hhu, delay=%hhu\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)) {
netif_err(pdata, drv, netdev,
"PFC requested for unsupported traffic class\n");
return -EINVAL;
}
if (!pdata->pfc) {
pdata->pfc = devm_kzalloc(pdata->dev, sizeof(*pdata->pfc),
GFP_KERNEL);
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 net_device *netdev)
{
return DCB_CAP_DCBX_HOST | DCB_CAP_DCBX_VER_IEEE;
}
static u8 xgbe_dcb_setdcbx(struct net_device *netdev, u8 dcbx)
{
struct xgbe_prv_data *pdata = netdev_priv(netdev);
u8 support = xgbe_dcb_getdcbx(netdev);
netif_dbg(pdata, drv, netdev, "DCBX=%#hhx\n", dcbx);
if (dcbx & ~support)
return 1;
if ((dcbx & support) != support)
return 1;
return 0;
}
static const struct dcbnl_rtnl_ops xgbe_dcbnl_ops = {
/* IEEE 802.1Qaz std */
.ieee_getets = xgbe_dcb_ieee_getets,
.ieee_setets = xgbe_dcb_ieee_setets,
.ieee_getpfc = xgbe_dcb_ieee_getpfc,
.ieee_setpfc = xgbe_dcb_ieee_setpfc,
/* DCBX configuration */
.getdcbx = xgbe_dcb_getdcbx,
.setdcbx = xgbe_dcb_setdcbx,
};
const struct dcbnl_rtnl_ops *xgbe_get_dcbnl_ops(void)
{
return &xgbe_dcbnl_ops;
}