1 /*
2 * Copyright (C) 2008 Michael Brown <mbrown@fensystems.co.uk>.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License as
6 * published by the Free Software Foundation; either version 2 of the
7 * License, or any later version.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
17 */
18
19 FILE_LICENCE ( GPL2_OR_LATER );
20
21 #include <stdint.h>
22 #include <stdlib.h>
23 #include <string.h>
24 #include <errno.h>
25 #include <unistd.h>
26 #include <byteswap.h>
27 #include <gpxe/infiniband.h>
28 #include <gpxe/ib_smc.h>
29
30 /**
31 * @file
32 *
33 * Infiniband Subnet Management Client
34 *
35 */
36
37 /**
38 * Get port information
39 *
40 * @v ibdev Infiniband device
41 * @v local_mad Method for issuing local MADs
42 * @v mad Management datagram to fill in
43 * @ret rc Return status code
44 */
ib_smc_get_port_info(struct ib_device * ibdev,ib_local_mad_t local_mad,union ib_mad * mad)45 static int ib_smc_get_port_info ( struct ib_device *ibdev,
46 ib_local_mad_t local_mad,
47 union ib_mad *mad ) {
48 int rc;
49
50 /* Construct MAD */
51 memset ( mad, 0, sizeof ( *mad ) );
52 mad->hdr.base_version = IB_MGMT_BASE_VERSION;
53 mad->hdr.mgmt_class = IB_MGMT_CLASS_SUBN_LID_ROUTED;
54 mad->hdr.class_version = 1;
55 mad->hdr.method = IB_MGMT_METHOD_GET;
56 mad->hdr.attr_id = htons ( IB_SMP_ATTR_PORT_INFO );
57 mad->hdr.attr_mod = htonl ( ibdev->port );
58
59 if ( ( rc = local_mad ( ibdev, mad ) ) != 0 ) {
60 DBGC ( ibdev, "IBDEV %p could not get port info: %s\n",
61 ibdev, strerror ( rc ) );
62 return rc;
63 }
64 return 0;
65 }
66
67 /**
68 * Get GUID information
69 *
70 * @v ibdev Infiniband device
71 * @v local_mad Method for issuing local MADs
72 * @v mad Management datagram to fill in
73 * @ret rc Return status code
74 */
ib_smc_get_guid_info(struct ib_device * ibdev,ib_local_mad_t local_mad,union ib_mad * mad)75 static int ib_smc_get_guid_info ( struct ib_device *ibdev,
76 ib_local_mad_t local_mad,
77 union ib_mad *mad ) {
78 int rc;
79
80 /* Construct MAD */
81 memset ( mad, 0, sizeof ( *mad ) );
82 mad->hdr.base_version = IB_MGMT_BASE_VERSION;
83 mad->hdr.mgmt_class = IB_MGMT_CLASS_SUBN_LID_ROUTED;
84 mad->hdr.class_version = 1;
85 mad->hdr.method = IB_MGMT_METHOD_GET;
86 mad->hdr.attr_id = htons ( IB_SMP_ATTR_GUID_INFO );
87
88 if ( ( rc = local_mad ( ibdev, mad ) ) != 0 ) {
89 DBGC ( ibdev, "IBDEV %p could not get GUID info: %s\n",
90 ibdev, strerror ( rc ) );
91 return rc;
92 }
93 return 0;
94 }
95
96 /**
97 * Get partition key table
98 *
99 * @v ibdev Infiniband device
100 * @v local_mad Method for issuing local MADs
101 * @v mad Management datagram to fill in
102 * @ret rc Return status code
103 */
ib_smc_get_pkey_table(struct ib_device * ibdev,ib_local_mad_t local_mad,union ib_mad * mad)104 static int ib_smc_get_pkey_table ( struct ib_device *ibdev,
105 ib_local_mad_t local_mad,
106 union ib_mad *mad ) {
107 int rc;
108
109 /* Construct MAD */
110 memset ( mad, 0, sizeof ( *mad ) );
111 mad->hdr.base_version = IB_MGMT_BASE_VERSION;
112 mad->hdr.mgmt_class = IB_MGMT_CLASS_SUBN_LID_ROUTED;
113 mad->hdr.class_version = 1;
114 mad->hdr.method = IB_MGMT_METHOD_GET;
115 mad->hdr.attr_id = htons ( IB_SMP_ATTR_PKEY_TABLE );
116
117 if ( ( rc = local_mad ( ibdev, mad ) ) != 0 ) {
118 DBGC ( ibdev, "IBDEV %p could not get pkey table: %s\n",
119 ibdev, strerror ( rc ) );
120 return rc;
121 }
122 return 0;
123 }
124
125 /**
126 * Get MAD parameters
127 *
128 * @v ibdev Infiniband device
129 * @v local_mad Method for issuing local MADs
130 * @ret rc Return status code
131 */
ib_smc_update(struct ib_device * ibdev,ib_local_mad_t local_mad)132 int ib_smc_update ( struct ib_device *ibdev, ib_local_mad_t local_mad ) {
133 union ib_mad mad;
134 struct ib_port_info *port_info = &mad.smp.smp_data.port_info;
135 struct ib_guid_info *guid_info = &mad.smp.smp_data.guid_info;
136 struct ib_pkey_table *pkey_table = &mad.smp.smp_data.pkey_table;
137 int rc;
138
139 /* Port info gives us the link state, the first half of the
140 * port GID and the SM LID.
141 */
142 if ( ( rc = ib_smc_get_port_info ( ibdev, local_mad, &mad ) ) != 0 )
143 return rc;
144 memcpy ( &ibdev->gid.u.half[0], port_info->gid_prefix,
145 sizeof ( ibdev->gid.u.half[0] ) );
146 ibdev->lid = ntohs ( port_info->lid );
147 ibdev->sm_lid = ntohs ( port_info->mastersm_lid );
148 ibdev->link_width_enabled = port_info->link_width_enabled;
149 ibdev->link_width_supported = port_info->link_width_supported;
150 ibdev->link_width_active = port_info->link_width_active;
151 ibdev->link_speed_supported =
152 ( port_info->link_speed_supported__port_state >> 4 );
153 ibdev->port_state =
154 ( port_info->link_speed_supported__port_state & 0xf );
155 ibdev->link_speed_active =
156 ( port_info->link_speed_active__link_speed_enabled >> 4 );
157 ibdev->link_speed_enabled =
158 ( port_info->link_speed_active__link_speed_enabled & 0xf );
159 ibdev->sm_sl = ( port_info->neighbour_mtu__mastersm_sl & 0xf );
160
161 /* GUID info gives us the second half of the port GID */
162 if ( ( rc = ib_smc_get_guid_info ( ibdev, local_mad, &mad ) ) != 0 )
163 return rc;
164 memcpy ( &ibdev->gid.u.half[1], guid_info->guid[0],
165 sizeof ( ibdev->gid.u.half[1] ) );
166
167 /* Get partition key */
168 if ( ( rc = ib_smc_get_pkey_table ( ibdev, local_mad, &mad ) ) != 0 )
169 return rc;
170 ibdev->pkey = ntohs ( pkey_table->pkey[0] );
171
172 DBGC ( ibdev, "IBDEV %p port GID is %08x:%08x:%08x:%08x\n", ibdev,
173 htonl ( ibdev->gid.u.dwords[0] ),
174 htonl ( ibdev->gid.u.dwords[1] ),
175 htonl ( ibdev->gid.u.dwords[2] ),
176 htonl ( ibdev->gid.u.dwords[3] ) );
177
178 return 0;
179 }
180