678 lines
19 KiB
C
678 lines
19 KiB
C
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/*
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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 "xgbe.h"
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#include "xgbe-common.h"
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static void xgbe_unmap_rdata(struct xgbe_prv_data *, struct xgbe_ring_data *);
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static void xgbe_free_ring(struct xgbe_prv_data *pdata,
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struct xgbe_ring *ring)
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{
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struct xgbe_ring_data *rdata;
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unsigned int i;
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if (!ring)
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return;
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if (ring->rdata) {
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for (i = 0; i < ring->rdesc_count; i++) {
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rdata = XGBE_GET_DESC_DATA(ring, i);
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xgbe_unmap_rdata(pdata, rdata);
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}
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kfree(ring->rdata);
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ring->rdata = NULL;
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}
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if (ring->rx_hdr_pa.pages) {
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dma_unmap_page(pdata->dev, ring->rx_hdr_pa.pages_dma,
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ring->rx_hdr_pa.pages_len, DMA_FROM_DEVICE);
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put_page(ring->rx_hdr_pa.pages);
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ring->rx_hdr_pa.pages = NULL;
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ring->rx_hdr_pa.pages_len = 0;
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ring->rx_hdr_pa.pages_offset = 0;
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ring->rx_hdr_pa.pages_dma = 0;
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}
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if (ring->rx_buf_pa.pages) {
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dma_unmap_page(pdata->dev, ring->rx_buf_pa.pages_dma,
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ring->rx_buf_pa.pages_len, DMA_FROM_DEVICE);
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put_page(ring->rx_buf_pa.pages);
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ring->rx_buf_pa.pages = NULL;
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ring->rx_buf_pa.pages_len = 0;
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ring->rx_buf_pa.pages_offset = 0;
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ring->rx_buf_pa.pages_dma = 0;
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}
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if (ring->rdesc) {
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dma_free_coherent(pdata->dev,
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(sizeof(struct xgbe_ring_desc) *
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ring->rdesc_count),
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ring->rdesc, ring->rdesc_dma);
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ring->rdesc = NULL;
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}
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}
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static void xgbe_free_ring_resources(struct xgbe_prv_data *pdata)
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{
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struct xgbe_channel *channel;
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unsigned int i;
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DBGPR("-->xgbe_free_ring_resources\n");
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for (i = 0; i < pdata->channel_count; i++) {
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channel = pdata->channel[i];
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xgbe_free_ring(pdata, channel->tx_ring);
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xgbe_free_ring(pdata, channel->rx_ring);
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}
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DBGPR("<--xgbe_free_ring_resources\n");
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}
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static void *xgbe_alloc_node(size_t size, int node)
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{
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void *mem;
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mem = kzalloc_node(size, GFP_KERNEL, node);
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if (!mem)
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mem = kzalloc(size, GFP_KERNEL);
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return mem;
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}
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static void *xgbe_dma_alloc_node(struct device *dev, size_t size,
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dma_addr_t *dma, int node)
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{
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void *mem;
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int cur_node = dev_to_node(dev);
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set_dev_node(dev, node);
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mem = dma_alloc_coherent(dev, size, dma, GFP_KERNEL);
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set_dev_node(dev, cur_node);
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if (!mem)
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mem = dma_alloc_coherent(dev, size, dma, GFP_KERNEL);
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return mem;
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}
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static int xgbe_init_ring(struct xgbe_prv_data *pdata,
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struct xgbe_ring *ring, unsigned int rdesc_count)
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{
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size_t size;
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if (!ring)
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return 0;
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/* Descriptors */
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size = rdesc_count * sizeof(struct xgbe_ring_desc);
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ring->rdesc_count = rdesc_count;
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ring->rdesc = xgbe_dma_alloc_node(pdata->dev, size, &ring->rdesc_dma,
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ring->node);
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if (!ring->rdesc)
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return -ENOMEM;
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/* Descriptor information */
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size = rdesc_count * sizeof(struct xgbe_ring_data);
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ring->rdata = xgbe_alloc_node(size, ring->node);
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if (!ring->rdata)
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return -ENOMEM;
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netif_dbg(pdata, drv, pdata->netdev,
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"rdesc=%p, rdesc_dma=%pad, rdata=%p, node=%d\n",
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ring->rdesc, &ring->rdesc_dma, ring->rdata, ring->node);
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return 0;
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}
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static int xgbe_alloc_ring_resources(struct xgbe_prv_data *pdata)
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{
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struct xgbe_channel *channel;
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unsigned int i;
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int ret;
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for (i = 0; i < pdata->channel_count; i++) {
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channel = pdata->channel[i];
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netif_dbg(pdata, drv, pdata->netdev, "%s - Tx ring:\n",
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channel->name);
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ret = xgbe_init_ring(pdata, channel->tx_ring,
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pdata->tx_desc_count);
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if (ret) {
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netdev_alert(pdata->netdev,
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"error initializing Tx ring\n");
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goto err_ring;
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}
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netif_dbg(pdata, drv, pdata->netdev, "%s - Rx ring:\n",
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channel->name);
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ret = xgbe_init_ring(pdata, channel->rx_ring,
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pdata->rx_desc_count);
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if (ret) {
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netdev_alert(pdata->netdev,
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"error initializing Rx ring\n");
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goto err_ring;
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}
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}
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return 0;
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err_ring:
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xgbe_free_ring_resources(pdata);
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return ret;
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}
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static int xgbe_alloc_pages(struct xgbe_prv_data *pdata,
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struct xgbe_page_alloc *pa, int alloc_order,
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int node)
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{
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struct page *pages = NULL;
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dma_addr_t pages_dma;
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gfp_t gfp;
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int order, ret;
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again:
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order = alloc_order;
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/* Try to obtain pages, decreasing order if necessary */
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gfp = GFP_ATOMIC | __GFP_COMP | __GFP_NOWARN;
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while (order >= 0) {
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pages = alloc_pages_node(node, gfp, order);
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if (pages)
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break;
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order--;
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}
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/* If we couldn't get local pages, try getting from anywhere */
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if (!pages && (node != NUMA_NO_NODE)) {
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node = NUMA_NO_NODE;
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goto again;
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}
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if (!pages)
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return -ENOMEM;
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/* Map the pages */
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pages_dma = dma_map_page(pdata->dev, pages, 0,
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PAGE_SIZE << order, DMA_FROM_DEVICE);
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ret = dma_mapping_error(pdata->dev, pages_dma);
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if (ret) {
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put_page(pages);
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return ret;
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}
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pa->pages = pages;
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pa->pages_len = PAGE_SIZE << order;
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pa->pages_offset = 0;
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pa->pages_dma = pages_dma;
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return 0;
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}
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static void xgbe_set_buffer_data(struct xgbe_buffer_data *bd,
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struct xgbe_page_alloc *pa,
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unsigned int len)
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{
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get_page(pa->pages);
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bd->pa = *pa;
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bd->dma_base = pa->pages_dma;
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bd->dma_off = pa->pages_offset;
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bd->dma_len = len;
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pa->pages_offset += len;
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if ((pa->pages_offset + len) > pa->pages_len) {
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/* This data descriptor is responsible for unmapping page(s) */
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bd->pa_unmap = *pa;
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/* Get a new allocation next time */
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pa->pages = NULL;
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pa->pages_len = 0;
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pa->pages_offset = 0;
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pa->pages_dma = 0;
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}
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}
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static int xgbe_map_rx_buffer(struct xgbe_prv_data *pdata,
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struct xgbe_ring *ring,
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struct xgbe_ring_data *rdata)
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{
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int ret;
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if (!ring->rx_hdr_pa.pages) {
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|
|
ret = xgbe_alloc_pages(pdata, &ring->rx_hdr_pa, 0, ring->node);
|
||
|
|
if (ret)
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!ring->rx_buf_pa.pages) {
|
||
|
|
ret = xgbe_alloc_pages(pdata, &ring->rx_buf_pa,
|
||
|
|
PAGE_ALLOC_COSTLY_ORDER, ring->node);
|
||
|
|
if (ret)
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Set up the header page info */
|
||
|
|
xgbe_set_buffer_data(&rdata->rx.hdr, &ring->rx_hdr_pa,
|
||
|
|
XGBE_SKB_ALLOC_SIZE);
|
||
|
|
|
||
|
|
/* Set up the buffer page info */
|
||
|
|
xgbe_set_buffer_data(&rdata->rx.buf, &ring->rx_buf_pa,
|
||
|
|
pdata->rx_buf_size);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void xgbe_wrapper_tx_descriptor_init(struct xgbe_prv_data *pdata)
|
||
|
|
{
|
||
|
|
struct xgbe_hw_if *hw_if = &pdata->hw_if;
|
||
|
|
struct xgbe_channel *channel;
|
||
|
|
struct xgbe_ring *ring;
|
||
|
|
struct xgbe_ring_data *rdata;
|
||
|
|
struct xgbe_ring_desc *rdesc;
|
||
|
|
dma_addr_t rdesc_dma;
|
||
|
|
unsigned int i, j;
|
||
|
|
|
||
|
|
DBGPR("-->xgbe_wrapper_tx_descriptor_init\n");
|
||
|
|
|
||
|
|
for (i = 0; i < pdata->channel_count; i++) {
|
||
|
|
channel = pdata->channel[i];
|
||
|
|
ring = channel->tx_ring;
|
||
|
|
if (!ring)
|
||
|
|
break;
|
||
|
|
|
||
|
|
rdesc = ring->rdesc;
|
||
|
|
rdesc_dma = ring->rdesc_dma;
|
||
|
|
|
||
|
|
for (j = 0; j < ring->rdesc_count; j++) {
|
||
|
|
rdata = XGBE_GET_DESC_DATA(ring, j);
|
||
|
|
|
||
|
|
rdata->rdesc = rdesc;
|
||
|
|
rdata->rdesc_dma = rdesc_dma;
|
||
|
|
|
||
|
|
rdesc++;
|
||
|
|
rdesc_dma += sizeof(struct xgbe_ring_desc);
|
||
|
|
}
|
||
|
|
|
||
|
|
ring->cur = 0;
|
||
|
|
ring->dirty = 0;
|
||
|
|
memset(&ring->tx, 0, sizeof(ring->tx));
|
||
|
|
|
||
|
|
hw_if->tx_desc_init(channel);
|
||
|
|
}
|
||
|
|
|
||
|
|
DBGPR("<--xgbe_wrapper_tx_descriptor_init\n");
|
||
|
|
}
|
||
|
|
|
||
|
|
static void xgbe_wrapper_rx_descriptor_init(struct xgbe_prv_data *pdata)
|
||
|
|
{
|
||
|
|
struct xgbe_hw_if *hw_if = &pdata->hw_if;
|
||
|
|
struct xgbe_channel *channel;
|
||
|
|
struct xgbe_ring *ring;
|
||
|
|
struct xgbe_ring_desc *rdesc;
|
||
|
|
struct xgbe_ring_data *rdata;
|
||
|
|
dma_addr_t rdesc_dma;
|
||
|
|
unsigned int i, j;
|
||
|
|
|
||
|
|
DBGPR("-->xgbe_wrapper_rx_descriptor_init\n");
|
||
|
|
|
||
|
|
for (i = 0; i < pdata->channel_count; i++) {
|
||
|
|
channel = pdata->channel[i];
|
||
|
|
ring = channel->rx_ring;
|
||
|
|
if (!ring)
|
||
|
|
break;
|
||
|
|
|
||
|
|
rdesc = ring->rdesc;
|
||
|
|
rdesc_dma = ring->rdesc_dma;
|
||
|
|
|
||
|
|
for (j = 0; j < ring->rdesc_count; j++) {
|
||
|
|
rdata = XGBE_GET_DESC_DATA(ring, j);
|
||
|
|
|
||
|
|
rdata->rdesc = rdesc;
|
||
|
|
rdata->rdesc_dma = rdesc_dma;
|
||
|
|
|
||
|
|
if (xgbe_map_rx_buffer(pdata, ring, rdata))
|
||
|
|
break;
|
||
|
|
|
||
|
|
rdesc++;
|
||
|
|
rdesc_dma += sizeof(struct xgbe_ring_desc);
|
||
|
|
}
|
||
|
|
|
||
|
|
ring->cur = 0;
|
||
|
|
ring->dirty = 0;
|
||
|
|
|
||
|
|
hw_if->rx_desc_init(channel);
|
||
|
|
}
|
||
|
|
|
||
|
|
DBGPR("<--xgbe_wrapper_rx_descriptor_init\n");
|
||
|
|
}
|
||
|
|
|
||
|
|
static void xgbe_unmap_rdata(struct xgbe_prv_data *pdata,
|
||
|
|
struct xgbe_ring_data *rdata)
|
||
|
|
{
|
||
|
|
if (rdata->skb_dma) {
|
||
|
|
if (rdata->mapped_as_page) {
|
||
|
|
dma_unmap_page(pdata->dev, rdata->skb_dma,
|
||
|
|
rdata->skb_dma_len, DMA_TO_DEVICE);
|
||
|
|
} else {
|
||
|
|
dma_unmap_single(pdata->dev, rdata->skb_dma,
|
||
|
|
rdata->skb_dma_len, DMA_TO_DEVICE);
|
||
|
|
}
|
||
|
|
rdata->skb_dma = 0;
|
||
|
|
rdata->skb_dma_len = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (rdata->skb) {
|
||
|
|
dev_kfree_skb_any(rdata->skb);
|
||
|
|
rdata->skb = NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (rdata->rx.hdr.pa.pages)
|
||
|
|
put_page(rdata->rx.hdr.pa.pages);
|
||
|
|
|
||
|
|
if (rdata->rx.hdr.pa_unmap.pages) {
|
||
|
|
dma_unmap_page(pdata->dev, rdata->rx.hdr.pa_unmap.pages_dma,
|
||
|
|
rdata->rx.hdr.pa_unmap.pages_len,
|
||
|
|
DMA_FROM_DEVICE);
|
||
|
|
put_page(rdata->rx.hdr.pa_unmap.pages);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (rdata->rx.buf.pa.pages)
|
||
|
|
put_page(rdata->rx.buf.pa.pages);
|
||
|
|
|
||
|
|
if (rdata->rx.buf.pa_unmap.pages) {
|
||
|
|
dma_unmap_page(pdata->dev, rdata->rx.buf.pa_unmap.pages_dma,
|
||
|
|
rdata->rx.buf.pa_unmap.pages_len,
|
||
|
|
DMA_FROM_DEVICE);
|
||
|
|
put_page(rdata->rx.buf.pa_unmap.pages);
|
||
|
|
}
|
||
|
|
|
||
|
|
memset(&rdata->tx, 0, sizeof(rdata->tx));
|
||
|
|
memset(&rdata->rx, 0, sizeof(rdata->rx));
|
||
|
|
|
||
|
|
rdata->mapped_as_page = 0;
|
||
|
|
|
||
|
|
if (rdata->state_saved) {
|
||
|
|
rdata->state_saved = 0;
|
||
|
|
rdata->state.skb = NULL;
|
||
|
|
rdata->state.len = 0;
|
||
|
|
rdata->state.error = 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static int xgbe_map_tx_skb(struct xgbe_channel *channel, struct sk_buff *skb)
|
||
|
|
{
|
||
|
|
struct xgbe_prv_data *pdata = channel->pdata;
|
||
|
|
struct xgbe_ring *ring = channel->tx_ring;
|
||
|
|
struct xgbe_ring_data *rdata;
|
||
|
|
struct xgbe_packet_data *packet;
|
||
|
|
struct skb_frag_struct *frag;
|
||
|
|
dma_addr_t skb_dma;
|
||
|
|
unsigned int start_index, cur_index;
|
||
|
|
unsigned int offset, tso, vlan, datalen, len;
|
||
|
|
unsigned int i;
|
||
|
|
|
||
|
|
DBGPR("-->xgbe_map_tx_skb: cur = %d\n", ring->cur);
|
||
|
|
|
||
|
|
offset = 0;
|
||
|
|
start_index = ring->cur;
|
||
|
|
cur_index = ring->cur;
|
||
|
|
|
||
|
|
packet = &ring->packet_data;
|
||
|
|
packet->rdesc_count = 0;
|
||
|
|
packet->length = 0;
|
||
|
|
|
||
|
|
tso = XGMAC_GET_BITS(packet->attributes, TX_PACKET_ATTRIBUTES,
|
||
|
|
TSO_ENABLE);
|
||
|
|
vlan = XGMAC_GET_BITS(packet->attributes, TX_PACKET_ATTRIBUTES,
|
||
|
|
VLAN_CTAG);
|
||
|
|
|
||
|
|
/* Save space for a context descriptor if needed */
|
||
|
|
if ((tso && (packet->mss != ring->tx.cur_mss)) ||
|
||
|
|
(vlan && (packet->vlan_ctag != ring->tx.cur_vlan_ctag)))
|
||
|
|
cur_index++;
|
||
|
|
rdata = XGBE_GET_DESC_DATA(ring, cur_index);
|
||
|
|
|
||
|
|
if (tso) {
|
||
|
|
/* Map the TSO header */
|
||
|
|
skb_dma = dma_map_single(pdata->dev, skb->data,
|
||
|
|
packet->header_len, DMA_TO_DEVICE);
|
||
|
|
if (dma_mapping_error(pdata->dev, skb_dma)) {
|
||
|
|
netdev_alert(pdata->netdev, "dma_map_single failed\n");
|
||
|
|
goto err_out;
|
||
|
|
}
|
||
|
|
rdata->skb_dma = skb_dma;
|
||
|
|
rdata->skb_dma_len = packet->header_len;
|
||
|
|
netif_dbg(pdata, tx_queued, pdata->netdev,
|
||
|
|
"skb header: index=%u, dma=%pad, len=%u\n",
|
||
|
|
cur_index, &skb_dma, packet->header_len);
|
||
|
|
|
||
|
|
offset = packet->header_len;
|
||
|
|
|
||
|
|
packet->length += packet->header_len;
|
||
|
|
|
||
|
|
cur_index++;
|
||
|
|
rdata = XGBE_GET_DESC_DATA(ring, cur_index);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Map the (remainder of the) packet */
|
||
|
|
for (datalen = skb_headlen(skb) - offset; datalen; ) {
|
||
|
|
len = min_t(unsigned int, datalen, XGBE_TX_MAX_BUF_SIZE);
|
||
|
|
|
||
|
|
skb_dma = dma_map_single(pdata->dev, skb->data + offset, len,
|
||
|
|
DMA_TO_DEVICE);
|
||
|
|
if (dma_mapping_error(pdata->dev, skb_dma)) {
|
||
|
|
netdev_alert(pdata->netdev, "dma_map_single failed\n");
|
||
|
|
goto err_out;
|
||
|
|
}
|
||
|
|
rdata->skb_dma = skb_dma;
|
||
|
|
rdata->skb_dma_len = len;
|
||
|
|
netif_dbg(pdata, tx_queued, pdata->netdev,
|
||
|
|
"skb data: index=%u, dma=%pad, len=%u\n",
|
||
|
|
cur_index, &skb_dma, len);
|
||
|
|
|
||
|
|
datalen -= len;
|
||
|
|
offset += len;
|
||
|
|
|
||
|
|
packet->length += len;
|
||
|
|
|
||
|
|
cur_index++;
|
||
|
|
rdata = XGBE_GET_DESC_DATA(ring, cur_index);
|
||
|
|
}
|
||
|
|
|
||
|
|
for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
|
||
|
|
netif_dbg(pdata, tx_queued, pdata->netdev,
|
||
|
|
"mapping frag %u\n", i);
|
||
|
|
|
||
|
|
frag = &skb_shinfo(skb)->frags[i];
|
||
|
|
offset = 0;
|
||
|
|
|
||
|
|
for (datalen = skb_frag_size(frag); datalen; ) {
|
||
|
|
len = min_t(unsigned int, datalen,
|
||
|
|
XGBE_TX_MAX_BUF_SIZE);
|
||
|
|
|
||
|
|
skb_dma = skb_frag_dma_map(pdata->dev, frag, offset,
|
||
|
|
len, DMA_TO_DEVICE);
|
||
|
|
if (dma_mapping_error(pdata->dev, skb_dma)) {
|
||
|
|
netdev_alert(pdata->netdev,
|
||
|
|
"skb_frag_dma_map failed\n");
|
||
|
|
goto err_out;
|
||
|
|
}
|
||
|
|
rdata->skb_dma = skb_dma;
|
||
|
|
rdata->skb_dma_len = len;
|
||
|
|
rdata->mapped_as_page = 1;
|
||
|
|
netif_dbg(pdata, tx_queued, pdata->netdev,
|
||
|
|
"skb frag: index=%u, dma=%pad, len=%u\n",
|
||
|
|
cur_index, &skb_dma, len);
|
||
|
|
|
||
|
|
datalen -= len;
|
||
|
|
offset += len;
|
||
|
|
|
||
|
|
packet->length += len;
|
||
|
|
|
||
|
|
cur_index++;
|
||
|
|
rdata = XGBE_GET_DESC_DATA(ring, cur_index);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Save the skb address in the last entry. We always have some data
|
||
|
|
* that has been mapped so rdata is always advanced past the last
|
||
|
|
* piece of mapped data - use the entry pointed to by cur_index - 1.
|
||
|
|
*/
|
||
|
|
rdata = XGBE_GET_DESC_DATA(ring, cur_index - 1);
|
||
|
|
rdata->skb = skb;
|
||
|
|
|
||
|
|
/* Save the number of descriptor entries used */
|
||
|
|
packet->rdesc_count = cur_index - start_index;
|
||
|
|
|
||
|
|
DBGPR("<--xgbe_map_tx_skb: count=%u\n", packet->rdesc_count);
|
||
|
|
|
||
|
|
return packet->rdesc_count;
|
||
|
|
|
||
|
|
err_out:
|
||
|
|
while (start_index < cur_index) {
|
||
|
|
rdata = XGBE_GET_DESC_DATA(ring, start_index++);
|
||
|
|
xgbe_unmap_rdata(pdata, rdata);
|
||
|
|
}
|
||
|
|
|
||
|
|
DBGPR("<--xgbe_map_tx_skb: count=0\n");
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
void xgbe_init_function_ptrs_desc(struct xgbe_desc_if *desc_if)
|
||
|
|
{
|
||
|
|
DBGPR("-->xgbe_init_function_ptrs_desc\n");
|
||
|
|
|
||
|
|
desc_if->alloc_ring_resources = xgbe_alloc_ring_resources;
|
||
|
|
desc_if->free_ring_resources = xgbe_free_ring_resources;
|
||
|
|
desc_if->map_tx_skb = xgbe_map_tx_skb;
|
||
|
|
desc_if->map_rx_buffer = xgbe_map_rx_buffer;
|
||
|
|
desc_if->unmap_rdata = xgbe_unmap_rdata;
|
||
|
|
desc_if->wrapper_tx_desc_init = xgbe_wrapper_tx_descriptor_init;
|
||
|
|
desc_if->wrapper_rx_desc_init = xgbe_wrapper_rx_descriptor_init;
|
||
|
|
|
||
|
|
DBGPR("<--xgbe_init_function_ptrs_desc\n");
|
||
|
|
}
|