491 строка
15 KiB
C
491 строка
15 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 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 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/module.h>
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#include <linux/device.h>
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#include <linux/platform_device.h>
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#include <linux/spinlock.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/io.h>
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#include <linux/of.h>
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#include <linux/of_net.h>
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#include <linux/clk.h>
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#include "xgbe.h"
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#include "xgbe-common.h"
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MODULE_AUTHOR("Tom Lendacky <thomas.lendacky@amd.com>");
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MODULE_LICENSE("Dual BSD/GPL");
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MODULE_VERSION(XGBE_DRV_VERSION);
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MODULE_DESCRIPTION(XGBE_DRV_DESC);
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static void xgbe_default_config(struct xgbe_prv_data *pdata)
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{
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DBGPR("-->xgbe_default_config\n");
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pdata->pblx8 = DMA_PBL_X8_ENABLE;
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pdata->tx_sf_mode = MTL_TSF_ENABLE;
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pdata->tx_threshold = MTL_TX_THRESHOLD_64;
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pdata->tx_pbl = DMA_PBL_16;
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pdata->tx_osp_mode = DMA_OSP_ENABLE;
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pdata->rx_sf_mode = MTL_RSF_DISABLE;
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pdata->rx_threshold = MTL_RX_THRESHOLD_64;
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pdata->rx_pbl = DMA_PBL_16;
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pdata->pause_autoneg = 1;
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pdata->tx_pause = 1;
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pdata->rx_pause = 1;
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pdata->power_down = 0;
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pdata->default_autoneg = AUTONEG_ENABLE;
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pdata->default_speed = SPEED_10000;
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DBGPR("<--xgbe_default_config\n");
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}
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static void xgbe_init_all_fptrs(struct xgbe_prv_data *pdata)
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{
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xgbe_init_function_ptrs_dev(&pdata->hw_if);
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xgbe_init_function_ptrs_desc(&pdata->desc_if);
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}
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static int xgbe_probe(struct platform_device *pdev)
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{
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struct xgbe_prv_data *pdata;
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struct xgbe_hw_if *hw_if;
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struct xgbe_desc_if *desc_if;
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struct net_device *netdev;
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struct device *dev = &pdev->dev;
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struct resource *res;
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const u8 *mac_addr;
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int ret;
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DBGPR("--> xgbe_probe\n");
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netdev = alloc_etherdev_mq(sizeof(struct xgbe_prv_data),
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XGBE_MAX_DMA_CHANNELS);
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if (!netdev) {
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dev_err(dev, "alloc_etherdev failed\n");
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ret = -ENOMEM;
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goto err_alloc;
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}
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SET_NETDEV_DEV(netdev, dev);
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pdata = netdev_priv(netdev);
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pdata->netdev = netdev;
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pdata->pdev = pdev;
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pdata->dev = dev;
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platform_set_drvdata(pdev, netdev);
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spin_lock_init(&pdata->lock);
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mutex_init(&pdata->xpcs_mutex);
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spin_lock_init(&pdata->tstamp_lock);
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/* Set and validate the number of descriptors for a ring */
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BUILD_BUG_ON_NOT_POWER_OF_2(XGBE_TX_DESC_CNT);
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pdata->tx_desc_count = XGBE_TX_DESC_CNT;
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if (pdata->tx_desc_count & (pdata->tx_desc_count - 1)) {
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dev_err(dev, "tx descriptor count (%d) is not valid\n",
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pdata->tx_desc_count);
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ret = -EINVAL;
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goto err_io;
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}
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BUILD_BUG_ON_NOT_POWER_OF_2(XGBE_RX_DESC_CNT);
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pdata->rx_desc_count = XGBE_RX_DESC_CNT;
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if (pdata->rx_desc_count & (pdata->rx_desc_count - 1)) {
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dev_err(dev, "rx descriptor count (%d) is not valid\n",
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pdata->rx_desc_count);
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ret = -EINVAL;
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goto err_io;
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}
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/* Obtain the system clock setting */
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pdata->sysclk = devm_clk_get(dev, XGBE_DMA_CLOCK);
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if (IS_ERR(pdata->sysclk)) {
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dev_err(dev, "dma devm_clk_get failed\n");
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ret = PTR_ERR(pdata->sysclk);
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goto err_io;
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}
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/* Obtain the PTP clock setting */
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pdata->ptpclk = devm_clk_get(dev, XGBE_PTP_CLOCK);
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if (IS_ERR(pdata->ptpclk)) {
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dev_err(dev, "ptp devm_clk_get failed\n");
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ret = PTR_ERR(pdata->ptpclk);
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goto err_io;
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}
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/* Obtain the mmio areas for the device */
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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pdata->xgmac_regs = devm_ioremap_resource(dev, res);
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if (IS_ERR(pdata->xgmac_regs)) {
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dev_err(dev, "xgmac ioremap failed\n");
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ret = PTR_ERR(pdata->xgmac_regs);
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goto err_io;
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}
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DBGPR(" xgmac_regs = %p\n", pdata->xgmac_regs);
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res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
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pdata->xpcs_regs = devm_ioremap_resource(dev, res);
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if (IS_ERR(pdata->xpcs_regs)) {
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dev_err(dev, "xpcs ioremap failed\n");
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ret = PTR_ERR(pdata->xpcs_regs);
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goto err_io;
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}
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DBGPR(" xpcs_regs = %p\n", pdata->xpcs_regs);
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/* Set the DMA mask */
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if (!dev->dma_mask)
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dev->dma_mask = &dev->coherent_dma_mask;
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ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(40));
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if (ret) {
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dev_err(dev, "dma_set_mask_and_coherent failed\n");
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goto err_io;
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}
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if (of_property_read_bool(dev->of_node, "dma-coherent")) {
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pdata->axdomain = XGBE_DMA_OS_AXDOMAIN;
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pdata->arcache = XGBE_DMA_OS_ARCACHE;
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pdata->awcache = XGBE_DMA_OS_AWCACHE;
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} else {
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pdata->axdomain = XGBE_DMA_SYS_AXDOMAIN;
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pdata->arcache = XGBE_DMA_SYS_ARCACHE;
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pdata->awcache = XGBE_DMA_SYS_AWCACHE;
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}
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ret = platform_get_irq(pdev, 0);
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if (ret < 0) {
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dev_err(dev, "platform_get_irq failed\n");
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goto err_io;
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}
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netdev->irq = ret;
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netdev->base_addr = (unsigned long)pdata->xgmac_regs;
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/* Set all the function pointers */
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xgbe_init_all_fptrs(pdata);
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hw_if = &pdata->hw_if;
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desc_if = &pdata->desc_if;
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/* Issue software reset to device */
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hw_if->exit(pdata);
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/* Populate the hardware features */
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xgbe_get_all_hw_features(pdata);
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/* Retrieve the MAC address */
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mac_addr = of_get_mac_address(dev->of_node);
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if (!mac_addr) {
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dev_err(dev, "invalid mac address for this device\n");
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ret = -EINVAL;
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goto err_io;
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}
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memcpy(netdev->dev_addr, mac_addr, netdev->addr_len);
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/* Retrieve the PHY mode - it must be "xgmii" */
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pdata->phy_mode = of_get_phy_mode(dev->of_node);
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if (pdata->phy_mode != PHY_INTERFACE_MODE_XGMII) {
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dev_err(dev, "invalid phy-mode specified for this device\n");
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ret = -EINVAL;
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goto err_io;
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}
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/* Set default configuration data */
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xgbe_default_config(pdata);
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/* Calculate the number of Tx and Rx rings to be created
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* -Tx (DMA) Channels map 1-to-1 to Tx Queues so set
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* the number of Tx queues to the number of Tx channels
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* enabled
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* -Rx (DMA) Channels do not map 1-to-1 so use the actual
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* number of Rx queues
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*/
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pdata->tx_ring_count = min_t(unsigned int, num_online_cpus(),
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pdata->hw_feat.tx_ch_cnt);
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pdata->tx_q_count = pdata->tx_ring_count;
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ret = netif_set_real_num_tx_queues(netdev, pdata->tx_ring_count);
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if (ret) {
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dev_err(dev, "error setting real tx queue count\n");
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goto err_io;
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}
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pdata->rx_ring_count = min_t(unsigned int,
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netif_get_num_default_rss_queues(),
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pdata->hw_feat.rx_ch_cnt);
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pdata->rx_q_count = pdata->hw_feat.rx_q_cnt;
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ret = netif_set_real_num_rx_queues(netdev, pdata->rx_ring_count);
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if (ret) {
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dev_err(dev, "error setting real rx queue count\n");
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goto err_io;
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}
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/* Prepare to regsiter with MDIO */
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pdata->mii_bus_id = kasprintf(GFP_KERNEL, "%s", pdev->name);
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if (!pdata->mii_bus_id) {
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dev_err(dev, "failed to allocate mii bus id\n");
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ret = -ENOMEM;
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goto err_io;
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}
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ret = xgbe_mdio_register(pdata);
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if (ret)
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goto err_bus_id;
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/* Set device operations */
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netdev->netdev_ops = xgbe_get_netdev_ops();
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netdev->ethtool_ops = xgbe_get_ethtool_ops();
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#ifdef CONFIG_AMD_XGBE_DCB
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netdev->dcbnl_ops = xgbe_get_dcbnl_ops();
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#endif
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/* Set device features */
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netdev->hw_features = NETIF_F_SG |
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NETIF_F_IP_CSUM |
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NETIF_F_IPV6_CSUM |
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NETIF_F_RXCSUM |
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NETIF_F_TSO |
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NETIF_F_TSO6 |
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NETIF_F_GRO |
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NETIF_F_HW_VLAN_CTAG_RX |
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NETIF_F_HW_VLAN_CTAG_TX |
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NETIF_F_HW_VLAN_CTAG_FILTER;
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netdev->vlan_features |= NETIF_F_SG |
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NETIF_F_IP_CSUM |
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NETIF_F_IPV6_CSUM |
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NETIF_F_TSO |
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NETIF_F_TSO6;
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netdev->features |= netdev->hw_features;
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pdata->netdev_features = netdev->features;
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netdev->priv_flags |= IFF_UNICAST_FLT;
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xgbe_init_rx_coalesce(pdata);
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xgbe_init_tx_coalesce(pdata);
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netif_carrier_off(netdev);
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ret = register_netdev(netdev);
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if (ret) {
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dev_err(dev, "net device registration failed\n");
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goto err_reg_netdev;
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}
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xgbe_ptp_register(pdata);
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xgbe_debugfs_init(pdata);
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netdev_notice(netdev, "net device enabled\n");
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DBGPR("<-- xgbe_probe\n");
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return 0;
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err_reg_netdev:
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xgbe_mdio_unregister(pdata);
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err_bus_id:
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kfree(pdata->mii_bus_id);
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err_io:
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free_netdev(netdev);
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err_alloc:
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dev_notice(dev, "net device not enabled\n");
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return ret;
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}
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static int xgbe_remove(struct platform_device *pdev)
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{
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struct net_device *netdev = platform_get_drvdata(pdev);
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struct xgbe_prv_data *pdata = netdev_priv(netdev);
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DBGPR("-->xgbe_remove\n");
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xgbe_debugfs_exit(pdata);
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xgbe_ptp_unregister(pdata);
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unregister_netdev(netdev);
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xgbe_mdio_unregister(pdata);
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kfree(pdata->mii_bus_id);
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free_netdev(netdev);
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DBGPR("<--xgbe_remove\n");
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return 0;
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}
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#ifdef CONFIG_PM
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static int xgbe_suspend(struct device *dev)
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{
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struct net_device *netdev = dev_get_drvdata(dev);
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int ret;
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DBGPR("-->xgbe_suspend\n");
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if (!netif_running(netdev)) {
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DBGPR("<--xgbe_dev_suspend\n");
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return -EINVAL;
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}
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ret = xgbe_powerdown(netdev, XGMAC_DRIVER_CONTEXT);
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DBGPR("<--xgbe_suspend\n");
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return ret;
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}
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static int xgbe_resume(struct device *dev)
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{
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struct net_device *netdev = dev_get_drvdata(dev);
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int ret;
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DBGPR("-->xgbe_resume\n");
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if (!netif_running(netdev)) {
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DBGPR("<--xgbe_dev_resume\n");
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return -EINVAL;
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}
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ret = xgbe_powerup(netdev, XGMAC_DRIVER_CONTEXT);
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DBGPR("<--xgbe_resume\n");
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|
return ret;
|
|
}
|
|
#endif /* CONFIG_PM */
|
|
|
|
static const struct of_device_id xgbe_of_match[] = {
|
|
{ .compatible = "amd,xgbe-seattle-v1a", },
|
|
{},
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(of, xgbe_of_match);
|
|
static SIMPLE_DEV_PM_OPS(xgbe_pm_ops, xgbe_suspend, xgbe_resume);
|
|
|
|
static struct platform_driver xgbe_driver = {
|
|
.driver = {
|
|
.name = "amd-xgbe",
|
|
.of_match_table = xgbe_of_match,
|
|
.pm = &xgbe_pm_ops,
|
|
},
|
|
.probe = xgbe_probe,
|
|
.remove = xgbe_remove,
|
|
};
|
|
|
|
module_platform_driver(xgbe_driver);
|