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This patch adds support for traffic classes as well as support for Data Center Bridging interfaces related to traffic classes and priority flow control. Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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Lendacky, Thomas
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Jul 31, 2014
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,270 @@ | ||
| /* | ||
| * AMD 10Gb Ethernet driver | ||
| * | ||
| * This file is available to you under your choice of the following two | ||
| * licenses: | ||
| * | ||
| * License 1: GPLv2 | ||
| * | ||
| * Copyright (c) 2014 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 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; | ||
|
|
||
| tc_ets = 0; | ||
| tc_ets_weight = 0; | ||
| for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) { | ||
| DBGPR(" 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]); | ||
| DBGPR(" PRIO%u: TC=%hhu\n", i, ets->prio_tc[i]); | ||
|
|
||
| if ((ets->tc_tx_bw[i] || ets->tc_tsa[i]) && | ||
| (i >= pdata->hw_feat.tc_cnt)) | ||
| return -EINVAL; | ||
|
|
||
| if (ets->prio_tc[i] >= pdata->hw_feat.tc_cnt) | ||
| return -EINVAL; | ||
|
|
||
| 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: | ||
| return -EINVAL; | ||
| } | ||
| } | ||
|
|
||
| /* Weights must add up to 100% */ | ||
| if (tc_ets && (tc_ets_weight != 100)) | ||
| return -EINVAL; | ||
|
|
||
| if (!pdata->ets) { | ||
| pdata->ets = devm_kzalloc(pdata->dev, sizeof(*pdata->ets), | ||
| GFP_KERNEL); | ||
| if (!pdata->ets) | ||
| return -ENOMEM; | ||
| } | ||
|
|
||
| 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); | ||
|
|
||
| DBGPR(" cap=%hhu, en=%hhx, mbc=%hhu, delay=%hhu\n", | ||
| pfc->pfc_cap, pfc->pfc_en, pfc->mbc, pfc->delay); | ||
|
|
||
| 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) | ||
| { | ||
| u8 support = xgbe_dcb_getdcbx(netdev); | ||
|
|
||
| DBGPR(" 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; | ||
| } |
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