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1.1 root 1: /*
2: * Copyright (C) 2008 Michael Brown <[email protected]>.
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 <ipxe/infiniband.h>
28: #include <ipxe/ib_smc.h>
29:
30: /**
31: * @file
32: *
33: * Infiniband Subnet Management Client
34: *
35: */
36:
37: /**
38: * Issue local MAD
39: *
40: * @v ibdev Infiniband device
41: * @v attr_id Attribute ID, in network byte order
42: * @v attr_mod Attribute modifier, in network byte order
43: * @v local_mad Method for issuing local MADs
44: * @v mad Management datagram to fill in
45: * @ret rc Return status code
46: */
47: static int ib_smc_mad ( struct ib_device *ibdev, uint16_t attr_id,
48: uint32_t attr_mod, ib_local_mad_t local_mad,
49: union ib_mad *mad ) {
50: int rc;
51:
52: /* Construct MAD */
53: memset ( mad, 0, sizeof ( *mad ) );
54: mad->hdr.base_version = IB_MGMT_BASE_VERSION;
55: mad->hdr.mgmt_class = IB_MGMT_CLASS_SUBN_LID_ROUTED;
56: mad->hdr.class_version = 1;
57: mad->hdr.method = IB_MGMT_METHOD_GET;
58: mad->hdr.attr_id = attr_id;
59: mad->hdr.attr_mod = attr_mod;
60:
61: /* Issue MAD */
62: if ( ( rc = local_mad ( ibdev, mad ) ) != 0 )
63: return rc;
64:
65: return 0;
66: }
67:
68: /**
69: * Get node information
70: *
71: * @v ibdev Infiniband device
72: * @v local_mad Method for issuing local MADs
73: * @v mad Management datagram to fill in
74: * @ret rc Return status code
75: */
76: static int ib_smc_get_node_info ( struct ib_device *ibdev,
77: ib_local_mad_t local_mad,
78: union ib_mad *mad ) {
79: int rc;
80:
81: /* Issue MAD */
82: if ( ( rc = ib_smc_mad ( ibdev, htons ( IB_SMP_ATTR_NODE_INFO ), 0,
83: local_mad, mad ) ) != 0 ) {
84: DBGC ( ibdev, "IBDEV %p could not get node info: %s\n",
85: ibdev, strerror ( rc ) );
86: return rc;
87: }
88: return 0;
89: }
90:
91: /**
92: * Get port information
93: *
94: * @v ibdev Infiniband device
95: * @v local_mad Method for issuing local MADs
96: * @v mad Management datagram to fill in
97: * @ret rc Return status code
98: */
99: static int ib_smc_get_port_info ( struct ib_device *ibdev,
100: ib_local_mad_t local_mad,
101: union ib_mad *mad ) {
102: int rc;
103:
104: /* Issue MAD */
105: if ( ( rc = ib_smc_mad ( ibdev, htons ( IB_SMP_ATTR_PORT_INFO ),
106: htonl ( ibdev->port ), local_mad, mad )) !=0){
107: DBGC ( ibdev, "IBDEV %p could not get port info: %s\n",
108: ibdev, strerror ( rc ) );
109: return rc;
110: }
111: return 0;
112: }
113:
114: /**
115: * Get GUID information
116: *
117: * @v ibdev Infiniband device
118: * @v local_mad Method for issuing local MADs
119: * @v mad Management datagram to fill in
120: * @ret rc Return status code
121: */
122: static int ib_smc_get_guid_info ( struct ib_device *ibdev,
123: ib_local_mad_t local_mad,
124: union ib_mad *mad ) {
125: int rc;
126:
127: /* Issue MAD */
128: if ( ( rc = ib_smc_mad ( ibdev, htons ( IB_SMP_ATTR_GUID_INFO ), 0,
129: local_mad, mad ) ) != 0 ) {
130: DBGC ( ibdev, "IBDEV %p could not get GUID info: %s\n",
131: ibdev, strerror ( rc ) );
132: return rc;
133: }
134: return 0;
135: }
136:
137: /**
138: * Get partition key table
139: *
140: * @v ibdev Infiniband device
141: * @v local_mad Method for issuing local MADs
142: * @v mad Management datagram to fill in
143: * @ret rc Return status code
144: */
145: static int ib_smc_get_pkey_table ( struct ib_device *ibdev,
146: ib_local_mad_t local_mad,
147: union ib_mad *mad ) {
148: int rc;
149:
150: /* Issue MAD */
151: if ( ( rc = ib_smc_mad ( ibdev, htons ( IB_SMP_ATTR_PKEY_TABLE ), 0,
152: local_mad, mad ) ) != 0 ) {
153: DBGC ( ibdev, "IBDEV %p could not get pkey table: %s\n",
154: ibdev, strerror ( rc ) );
155: return rc;
156: }
157: return 0;
158: }
159:
160: /**
161: * Get Infiniband parameters using SMC
162: *
163: * @v ibdev Infiniband device
164: * @v local_mad Method for issuing local MADs
165: * @ret rc Return status code
166: */
167: static int ib_smc_get ( struct ib_device *ibdev, ib_local_mad_t local_mad ) {
168: union ib_mad mad;
169: struct ib_node_info *node_info = &mad.smp.smp_data.node_info;
170: struct ib_port_info *port_info = &mad.smp.smp_data.port_info;
171: struct ib_guid_info *guid_info = &mad.smp.smp_data.guid_info;
172: struct ib_pkey_table *pkey_table = &mad.smp.smp_data.pkey_table;
173: int rc;
174:
175: /* Node info gives us the node GUID */
176: if ( ( rc = ib_smc_get_node_info ( ibdev, local_mad, &mad ) ) != 0 )
177: return rc;
178: memcpy ( &ibdev->node_guid, &node_info->node_guid,
179: sizeof ( ibdev->node_guid ) );
180:
181: /* Port info gives us the link state, the first half of the
182: * port GID and the SM LID.
183: */
184: if ( ( rc = ib_smc_get_port_info ( ibdev, local_mad, &mad ) ) != 0 )
185: return rc;
186: memcpy ( &ibdev->gid.s.prefix, port_info->gid_prefix,
187: sizeof ( ibdev->gid.s.prefix ) );
188: ibdev->lid = ntohs ( port_info->lid );
189: ibdev->sm_lid = ntohs ( port_info->mastersm_lid );
190: ibdev->link_width_enabled = port_info->link_width_enabled;
191: ibdev->link_width_supported = port_info->link_width_supported;
192: ibdev->link_width_active = port_info->link_width_active;
193: ibdev->link_speed_supported =
194: ( port_info->link_speed_supported__port_state >> 4 );
195: ibdev->port_state =
196: ( port_info->link_speed_supported__port_state & 0xf );
197: ibdev->link_speed_active =
198: ( port_info->link_speed_active__link_speed_enabled >> 4 );
199: ibdev->link_speed_enabled =
200: ( port_info->link_speed_active__link_speed_enabled & 0xf );
201: ibdev->sm_sl = ( port_info->neighbour_mtu__mastersm_sl & 0xf );
202:
203: /* GUID info gives us the second half of the port GID */
204: if ( ( rc = ib_smc_get_guid_info ( ibdev, local_mad, &mad ) ) != 0 )
205: return rc;
206: memcpy ( &ibdev->gid.s.guid, guid_info->guid[0],
207: sizeof ( ibdev->gid.s.guid ) );
208:
209: /* Get partition key */
210: if ( ( rc = ib_smc_get_pkey_table ( ibdev, local_mad, &mad ) ) != 0 )
211: return rc;
212: ibdev->pkey = ntohs ( pkey_table->pkey[0] );
213:
214: DBGC ( ibdev, "IBDEV %p port GID is " IB_GID_FMT "\n",
215: ibdev, IB_GID_ARGS ( &ibdev->gid ) );
216:
217: return 0;
218: }
219:
220: /**
221: * Initialise Infiniband parameters using SMC
222: *
223: * @v ibdev Infiniband device
224: * @v local_mad Method for issuing local MADs
225: * @ret rc Return status code
226: */
227: int ib_smc_init ( struct ib_device *ibdev, ib_local_mad_t local_mad ) {
228: int rc;
229:
230: /* Get MAD parameters */
231: if ( ( rc = ib_smc_get ( ibdev, local_mad ) ) != 0 )
232: return rc;
233:
234: return 0;
235: }
236:
237: /**
238: * Update Infiniband parameters using SMC
239: *
240: * @v ibdev Infiniband device
241: * @v local_mad Method for issuing local MADs
242: * @ret rc Return status code
243: */
244: int ib_smc_update ( struct ib_device *ibdev, ib_local_mad_t local_mad ) {
245: int rc;
246:
247: /* Get MAD parameters */
248: if ( ( rc = ib_smc_get ( ibdev, local_mad ) ) != 0 )
249: return rc;
250:
251: /* Notify Infiniband core of potential link state change */
252: ib_link_state_changed ( ibdev );
253:
254: return 0;
255: }
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