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 #define TIPC_MAX_IB_LINK_WIN 500
  46
  47 /* convert InfiniBand address (media address format) media address to string */
  48 static 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 */
  60 static 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 */
  68 static 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 */
  81 static 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 */
  89 struct 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 };