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 */
tipc_ib_addr2str(struct tipc_media_addr * a,char * str_buf,int str_size)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 */
tipc_ib_addr2msg(char * msg,struct tipc_media_addr * addr)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 */
tipc_ib_raw2addr(struct tipc_bearer * b,struct tipc_media_addr * addr,const char * msg)68 static 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 */
tipc_ib_msg2addr(struct tipc_bearer * b,struct tipc_media_addr * addr,char * msg)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 };
105