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1.1 root 1: /*
2: * Copyright (C) 2007 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 <string.h>
23: #include <byteswap.h>
24: #include <errno.h>
25: #include <ipxe/list.h>
26: #include <ipxe/infiniband.h>
27: #include <ipxe/ib_mi.h>
28: #include <ipxe/ib_mcast.h>
29:
30: /** @file
31: *
32: * Infiniband multicast groups
33: *
34: */
35:
36: /**
37: * Generate multicast membership MAD
38: *
39: * @v ibdev Infiniband device
40: * @v gid Multicast GID
41: * @v join Join (rather than leave) group
42: * @v mad MAD to fill in
43: */
44: static void ib_mcast_mad ( struct ib_device *ibdev, union ib_gid *gid,
45: int join, union ib_mad *mad ) {
46: struct ib_mad_sa *sa = &mad->sa;
47:
48: /* Construct multicast membership record request */
49: memset ( sa, 0, sizeof ( *sa ) );
50: sa->mad_hdr.mgmt_class = IB_MGMT_CLASS_SUBN_ADM;
51: sa->mad_hdr.class_version = IB_SA_CLASS_VERSION;
52: sa->mad_hdr.method =
53: ( join ? IB_MGMT_METHOD_SET : IB_MGMT_METHOD_DELETE );
54: sa->mad_hdr.attr_id = htons ( IB_SA_ATTR_MC_MEMBER_REC );
55: sa->sa_hdr.comp_mask[1] =
56: htonl ( IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
57: IB_SA_MCMEMBER_REC_JOIN_STATE );
58: sa->sa_data.mc_member_record.scope__join_state = 1;
59: memcpy ( &sa->sa_data.mc_member_record.mgid, gid,
60: sizeof ( sa->sa_data.mc_member_record.mgid ) );
61: memcpy ( &sa->sa_data.mc_member_record.port_gid, &ibdev->gid,
62: sizeof ( sa->sa_data.mc_member_record.port_gid ) );
63: }
64:
65: /**
66: * Handle multicast membership record join response
67: *
68: * @v ibdev Infiniband device
69: * @v mi Management interface
70: * @v madx Management transaction
71: * @v rc Status code
72: * @v mad Received MAD (or NULL on error)
73: * @v av Source address vector (or NULL on error)
74: */
75: static void ib_mcast_complete ( struct ib_device *ibdev,
76: struct ib_mad_interface *mi __unused,
77: struct ib_mad_transaction *madx,
78: int rc, union ib_mad *mad,
79: struct ib_address_vector *av __unused ) {
80: struct ib_mc_membership *membership = ib_madx_get_ownerdata ( madx );
81: struct ib_queue_pair *qp = membership->qp;
82: union ib_gid *gid = &membership->gid;
83: struct ib_mc_member_record *mc_member_record =
84: &mad->sa.sa_data.mc_member_record;
85: int joined;
86: unsigned long qkey;
87:
88: /* Report failures */
89: if ( ( rc == 0 ) && ( mad->hdr.status != htons ( IB_MGMT_STATUS_OK ) ))
90: rc = -ENOTCONN;
91: if ( rc != 0 ) {
92: DBGC ( ibdev, "IBDEV %p QPN %lx join failed: %s\n",
93: ibdev, qp->qpn, strerror ( rc ) );
94: goto out;
95: }
96:
97: /* Extract values from MAD */
98: joined = ( mad->hdr.method == IB_MGMT_METHOD_GET_RESP );
99: qkey = ntohl ( mc_member_record->qkey );
100: DBGC ( ibdev, "IBDEV %p QPN %lx %s " IB_GID_FMT " qkey %lx\n",
101: ibdev, qp->qpn, ( joined ? "joined" : "left" ),
102: IB_GID_ARGS ( gid ), qkey );
103:
104: /* Set queue key */
105: qp->qkey = qkey;
106: if ( ( rc = ib_modify_qp ( ibdev, qp ) ) != 0 ) {
107: DBGC ( ibdev, "IBDEV %p QPN %lx could not modify qkey: %s\n",
108: ibdev, qp->qpn, strerror ( rc ) );
109: goto out;
110: }
111:
112: out:
113: /* Destroy the completed transaction */
114: ib_destroy_madx ( ibdev, mi, madx );
115: membership->madx = NULL;
116:
117: /* Hand off to upper completion handler */
118: membership->complete ( ibdev, qp, membership, rc, mad );
119: }
120:
121: /** Multicast membership management transaction completion operations */
122: static struct ib_mad_transaction_operations ib_mcast_op = {
123: .complete = ib_mcast_complete,
124: };
125:
126: /**
127: * Join multicast group
128: *
129: * @v ibdev Infiniband device
130: * @v qp Queue pair
131: * @v membership Multicast group membership
132: * @v gid Multicast GID to join
133: * @v joined Join completion handler
134: * @ret rc Return status code
135: */
136: int ib_mcast_join ( struct ib_device *ibdev, struct ib_queue_pair *qp,
137: struct ib_mc_membership *membership, union ib_gid *gid,
138: void ( * complete ) ( struct ib_device *ibdev,
139: struct ib_queue_pair *qp,
140: struct ib_mc_membership *membership,
141: int rc, union ib_mad *mad ) ) {
142: union ib_mad mad;
143: int rc;
144:
145: DBGC ( ibdev, "IBDEV %p QPN %lx joining " IB_GID_FMT "\n",
146: ibdev, qp->qpn, IB_GID_ARGS ( gid ) );
147:
148: /* Initialise structure */
149: membership->qp = qp;
150: memcpy ( &membership->gid, gid, sizeof ( membership->gid ) );
151: membership->complete = complete;
152:
153: /* Attach queue pair to multicast GID */
154: if ( ( rc = ib_mcast_attach ( ibdev, qp, gid ) ) != 0 ) {
155: DBGC ( ibdev, "IBDEV %p QPN %lx could not attach: %s\n",
156: ibdev, qp->qpn, strerror ( rc ) );
157: goto err_mcast_attach;
158: }
159:
160: /* Initiate multicast membership join */
161: ib_mcast_mad ( ibdev, gid, 1, &mad );
162: membership->madx = ib_create_madx ( ibdev, ibdev->gsi, &mad, NULL,
163: &ib_mcast_op );
164: if ( ! membership->madx ) {
165: DBGC ( ibdev, "IBDEV %p QPN %lx could not create join "
166: "transaction\n", ibdev, qp->qpn );
167: rc = -ENOMEM;
168: goto err_create_madx;
169: }
170: ib_madx_set_ownerdata ( membership->madx, membership );
171:
172: return 0;
173:
174: ib_destroy_madx ( ibdev, ibdev->gsi, membership->madx );
175: err_create_madx:
176: ib_mcast_detach ( ibdev, qp, gid );
177: err_mcast_attach:
178: return rc;
179: }
180:
181: /**
182: * Leave multicast group
183: *
184: * @v ibdev Infiniband device
185: * @v qp Queue pair
186: * @v membership Multicast group membership
187: */
188: void ib_mcast_leave ( struct ib_device *ibdev, struct ib_queue_pair *qp,
189: struct ib_mc_membership *membership ) {
190: union ib_gid *gid = &membership->gid;
191: union ib_mad mad;
192: int rc;
193:
194: DBGC ( ibdev, "IBDEV %p QPN %lx leaving " IB_GID_FMT "\n",
195: ibdev, qp->qpn, IB_GID_ARGS ( gid ) );
196:
197: /* Detach from multicast GID */
198: ib_mcast_detach ( ibdev, qp, &membership->gid );
199:
200: /* Cancel multicast membership join, if applicable */
201: if ( membership->madx ) {
202: ib_destroy_madx ( ibdev, ibdev->gsi, membership->madx );
203: membership->madx = NULL;
204: }
205:
206: /* Send a single group leave MAD */
207: ib_mcast_mad ( ibdev, &membership->gid, 0, &mad );
208: if ( ( rc = ib_mi_send ( ibdev, ibdev->gsi, &mad, NULL ) ) != 0 ) {
209: DBGC ( ibdev, "IBDEV %p QPN %lx could not send leave request: "
210: "%s\n", ibdev, qp->qpn, strerror ( rc ) );
211: }
212: }
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