net/tipc/ib_media.c

   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 /* convert InfiniBand address (media address format) media address to string */
  46 static int tipc_ib_addr2str(struct tipc_media_addr *a, char *str_buf,
  47                             int str_size)
  48 {
  49         if (str_size < 60)      /* 60 = 19 * strlen("xx:") + strlen("xx\0") */
  50                 return 1;
  51
  52         sprintf(str_buf, "%20phC", a->value);
  53
  54         return 0;
  55 }
  56
  57 /* Convert from media address format to discovery message addr format */
  58 static int tipc_ib_addr2msg(char *msg, struct tipc_media_addr *addr)
  59 {
  60         memset(msg, 0, TIPC_MEDIA_ADDR_SIZE);
  61         memcpy(msg, addr->value, INFINIBAND_ALEN);
  62         return 0;
  63 }
  64
  65 /* Convert raw InfiniBand address format to media addr format */
  66 static int tipc_ib_raw2addr(struct tipc_bearer *b,
  67                             struct tipc_media_addr *addr,
  68                             char *msg)
  69 {
  70         memset(addr, 0, sizeof(*addr));
  71         memcpy(addr->value, msg, INFINIBAND_ALEN);
  72         addr->media_id = TIPC_MEDIA_TYPE_IB;
  73         addr->broadcast = !memcmp(msg, b->bcast_addr.value,
  74                                   INFINIBAND_ALEN);
  75         return 0;
  76 }
  77
  78 /* Convert discovery msg addr format to InfiniBand media addr format */
  79 static int tipc_ib_msg2addr(struct tipc_bearer *b,
  80                             struct tipc_media_addr *addr,
  81                             char *msg)
  82 {
  83         return tipc_ib_raw2addr(b, addr, msg);
  84 }
  85
  86 /* InfiniBand media registration info */
  87 struct tipc_media ib_media_info = {
  88         .send_msg       = tipc_l2_send_msg,
  89         .enable_media   = tipc_enable_l2_media,
  90         .disable_media  = tipc_disable_l2_media,
  91         .addr2str       = tipc_ib_addr2str,
  92         .addr2msg       = tipc_ib_addr2msg,
  93         .msg2addr       = tipc_ib_msg2addr,
  94         .raw2addr       = tipc_ib_raw2addr,
  95         .priority       = TIPC_DEF_LINK_PRI,
  96         .tolerance      = TIPC_DEF_LINK_TOL,
  97         .window         = TIPC_DEF_LINK_WIN,
  98         .type_id        = TIPC_MEDIA_TYPE_IB,
  99         .hwaddr_len     = INFINIBAND_ALEN,
 100         .name           = "ib"
 101 };