2007-09-12 23:17:43 +02:00
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/*
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* Copyright (C) 2007 Michael Brown <mbrown@fensystems.co.uk>.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or any later version.
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*
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* This program 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, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <stdint.h>
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#include <stdio.h>
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#include <string.h>
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#include <byteswap.h>
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#include <errno.h>
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#include <assert.h>
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#include <gpxe/if_arp.h>
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#include <gpxe/netdevice.h>
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#include <gpxe/iobuf.h>
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#include <gpxe/infiniband.h>
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/** @file
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*
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* Infiniband protocol
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*
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*/
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/** Infiniband broadcast MAC address */
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static uint8_t ib_broadcast[IB_ALEN] = { 0xff, };
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/**
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* Transmit Infiniband packet
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*
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* @v iobuf I/O buffer
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* @v netdev Network device
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* @v net_protocol Network-layer protocol
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* @v ll_dest Link-layer destination address
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*
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* Prepends the Infiniband link-layer header and transmits the packet.
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*/
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static int ib_tx ( struct io_buffer *iobuf, struct net_device *netdev,
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struct net_protocol *net_protocol, const void *ll_dest ) {
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struct ibhdr *ibhdr = iob_push ( iobuf, sizeof ( *ibhdr ) );
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/* Build Infiniband header */
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ibhdr->proto = net_protocol->net_proto;
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ibhdr->reserved = 0;
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2007-09-14 12:10:25 +02:00
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( void ) ll_dest;
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2007-09-12 23:17:43 +02:00
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/* Hand off to network device */
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return netdev_tx ( netdev, iobuf );
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}
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/**
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* Process received Infiniband packet
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*
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* @v iobuf I/O buffer
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* @v netdev Network device
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*
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* Strips off the Infiniband link-layer header and passes up to the
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* network-layer protocol.
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*/
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static int ib_rx ( struct io_buffer *iobuf, struct net_device *netdev ) {
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struct ibhdr *ibhdr = iobuf->data;
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/* Sanity check */
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if ( iob_len ( iobuf ) < sizeof ( *ibhdr ) ) {
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DBG ( "Infiniband packet too short (%d bytes)\n",
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iob_len ( iobuf ) );
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free_iob ( iobuf );
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return -EINVAL;
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}
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/* Strip off Infiniband header */
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iob_pull ( iobuf, sizeof ( *ibhdr ) );
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/* Hand off to network-layer protocol */
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2007-09-14 12:10:25 +02:00
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return net_rx ( iobuf, netdev, ibhdr->proto, NULL );
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2007-09-12 23:17:43 +02:00
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}
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/**
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* Transcribe Infiniband address
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*
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* @v ll_addr Link-layer address
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* @ret string Link-layer address in human-readable format
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*/
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const char * ib_ntoa ( const void *ll_addr ) {
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static char buf[61];
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const uint8_t *ib_addr = ll_addr;
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unsigned int i;
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char *p = buf;
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for ( i = 0 ; i < IB_ALEN ; i++ ) {
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p += sprintf ( p, ":%02x", ib_addr[i] );
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}
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return ( buf + 1 );
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}
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/** Infiniband protocol */
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struct ll_protocol infiniband_protocol __ll_protocol = {
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.name = "Infiniband",
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.ll_proto = htons ( ARPHRD_INFINIBAND ),
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.ll_addr_len = IB_ALEN,
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.ll_header_len = IB_HLEN,
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.ll_broadcast = ib_broadcast,
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.tx = ib_tx,
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.rx = ib_rx,
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.ntoa = ib_ntoa,
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};
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