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			    const 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