364e08f2bb
This is a Linux-specific virtual PMD driver backed by an AF_PACKET socket. This implementation uses mmap'ed ring buffers to limit copying and user/kernel transitions. The PACKET_FANOUT_HASH behavior of AF_PACKET is used for frame reception. In the current implementation, Tx and Rx queues are always paired, and therefore are always equal in number -- changing this would be a Simple Matter Of Programming. Interfaces of this type are created with a command line option like "--vdev=eth_af_packet0,iface=...". There are a number of options available as arguments: - Interface is chosen by "iface" (required) - Number of queue pairs set by "qpairs" (optional, default: 1) - AF_PACKET MMAP block size set by "blocksz" (optional, default: 4096) - AF_PACKET MMAP frame size set by "framesz" (optional, default: 2048) - AF_PACKET MMAP frame count set by "framecnt" (optional, default: 512) Signed-off-by: John W. Linville <linville@tuxdriver.com> [Thomas: disable because of incompatibility with some kernels]
54 lines
2.0 KiB
C
54 lines
2.0 KiB
C
/*-
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* BSD LICENSE
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*
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* Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
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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
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* are met:
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*
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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
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* 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
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* 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
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _RTE_ETH_AF_PACKET_H_
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#define _RTE_ETH_AF_PACKET_H_
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define RTE_PMD_AF_PACKET_MAX_RINGS 16
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/**
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* For use by the EAL only. Called as part of EAL init to set up any dummy NICs
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* configured on command line.
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*/
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int rte_pmd_af_packet_devinit(const char *name, const char *params);
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#ifdef __cplusplus
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}
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#endif
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#endif
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