linux/net/tipc/ib_media.c
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   1/*
   2 * net/tipc/ib_media.c: Infiniband bearer support for TIPC
   3 *
   4 * Copyright (c) 2013 Patrick McHardy <kaber@trash.net>
   5 *
   6 * Based on eth_media.c, which carries the following copyright notice:
   7 *
   8 * Copyright (c) 2001-2007, Ericsson AB
   9 * Copyright (c) 2005-2008, 2011, Wind River Systems
  10 * All rights reserved.
  11 *
  12 * Redistribution and use in source and binary forms, with or without
  13 * modification, are permitted provided that the following conditions are met:
  14 *
  15 * 1. Redistributions of source code must retain the above copyright
  16 *    notice, this list of conditions and the following disclaimer.
  17 * 2. Redistributions in binary form must reproduce the above copyright
  18 *    notice, this list of conditions and the following disclaimer in the
  19 *    documentation and/or other materials provided with the distribution.
  20 * 3. Neither the names of the copyright holders nor the names of its
  21 *    contributors may be used to endorse or promote products derived from
  22 *    this software without specific prior written permission.
  23 *
  24 * Alternatively, this software may be distributed under the terms of the
  25 * GNU General Public License ("GPL") version 2 as published by the Free
  26 * Software Foundation.
  27 *
  28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  29 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  31 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  32 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  33 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  34 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  35 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  36 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  37 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  38 * POSSIBILITY OF SUCH DAMAGE.
  39 */
  40
  41#include <linux/if_infiniband.h>
  42#include "core.h"
  43#include "bearer.h"
  44
  45#define TIPC_MAX_IB_LINK_WIN 500
  46
  47/* convert InfiniBand address (media address format) media address to string */
  48static int tipc_ib_addr2str(struct tipc_media_addr *a, char *str_buf,
  49                            int str_size)
  50{
  51        if (str_size < 60)      /* 60 = 19 * strlen("xx:") + strlen("xx\0") */
  52                return 1;
  53
  54        sprintf(str_buf, "%20phC", a->value);
  55
  56        return 0;
  57}
  58
  59/* Convert from media address format to discovery message addr format */
  60static int tipc_ib_addr2msg(char *msg, struct tipc_media_addr *addr)
  61{
  62        memset(msg, 0, TIPC_MEDIA_INFO_SIZE);
  63        memcpy(msg, addr->value, INFINIBAND_ALEN);
  64        return 0;
  65}
  66
  67/* Convert raw InfiniBand address format to media addr format */
  68static int tipc_ib_raw2addr(struct tipc_bearer *b,
  69                            struct tipc_media_addr *addr,
  70                            char *msg)
  71{
  72        memset(addr, 0, sizeof(*addr));
  73        memcpy(addr->value, msg, INFINIBAND_ALEN);
  74        addr->media_id = TIPC_MEDIA_TYPE_IB;
  75        addr->broadcast = !memcmp(msg, b->bcast_addr.value,
  76                                  INFINIBAND_ALEN);
  77        return 0;
  78}
  79
  80/* Convert discovery msg addr format to InfiniBand media addr format */
  81static int tipc_ib_msg2addr(struct tipc_bearer *b,
  82                            struct tipc_media_addr *addr,
  83                            char *msg)
  84{
  85        return tipc_ib_raw2addr(b, addr, msg);
  86}
  87
  88/* InfiniBand media registration info */
  89struct tipc_media ib_media_info = {
  90        .send_msg       = tipc_l2_send_msg,
  91        .enable_media   = tipc_enable_l2_media,
  92        .disable_media  = tipc_disable_l2_media,
  93        .addr2str       = tipc_ib_addr2str,
  94        .addr2msg       = tipc_ib_addr2msg,
  95        .msg2addr       = tipc_ib_msg2addr,
  96        .raw2addr       = tipc_ib_raw2addr,
  97        .priority       = TIPC_DEF_LINK_PRI,
  98        .tolerance      = TIPC_DEF_LINK_TOL,
  99        .min_win        = TIPC_DEF_LINK_WIN,
 100        .max_win        = TIPC_MAX_IB_LINK_WIN,
 101        .type_id        = TIPC_MEDIA_TYPE_IB,
 102        .hwaddr_len     = INFINIBAND_ALEN,
 103        .name           = "ib"
 104};
 105