1/*
2 * Copyright (c) 2004-2009 Voltaire Inc.  All rights reserved.
3 *
4 * This software is available to you under a choice of one of two
5 * licenses.  You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
9 *
10 *     Redistribution and use in source and binary forms, with or
11 *     without modification, are permitted provided that the following
12 *     conditions are met:
13 *
14 *      - Redistributions of source code must retain the above
15 *        copyright notice, this list of conditions and the following
16 *        disclaimer.
17 *
18 *      - Redistributions in binary form must reproduce the above
19 *        copyright notice, this list of conditions and the following
20 *        disclaimer in the documentation and/or other materials
21 *        provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 *
32 */
33
34#if HAVE_CONFIG_H
35#  include <config.h>
36#endif				/* HAVE_CONFIG_H */
37
38#include <stdio.h>
39#include <stdlib.h>
40#include <string.h>
41#include <errno.h>
42
43#include <infiniband/umad.h>
44#include <infiniband/mad.h>
45
46#include "mad_internal.h"
47
48#undef DEBUG
49#define DEBUG	if (ibdebug)	IBWARN
50
51int mad_send(ib_rpc_t * rpc, ib_portid_t * dport, ib_rmpp_hdr_t * rmpp,
52	     void *data)
53{
54	return mad_send_via(rpc, dport, rmpp, data, ibmp);
55}
56
57int mad_send_via(ib_rpc_t * rpc, ib_portid_t * dport, ib_rmpp_hdr_t * rmpp,
58		 void *data, struct ibmad_port *srcport)
59{
60	uint8_t pktbuf[1024];
61	void *umad = pktbuf;
62
63	memset(pktbuf, 0, umad_size() + IB_MAD_SIZE);
64
65	DEBUG("rmpp %p data %p", rmpp, data);
66
67	if (mad_build_pkt(umad, rpc, dport, rmpp, data) < 0)
68		return -1;
69
70	if (ibdebug) {
71		IBWARN("data offs %d sz %d", rpc->dataoffs, rpc->datasz);
72		xdump(stderr, "mad send data\n",
73		      (char *)umad_get_mad(umad) + rpc->dataoffs, rpc->datasz);
74	}
75
76	if (umad_send(srcport->port_id, srcport->class_agents[rpc->mgtclass & 0xff],
77		      umad, IB_MAD_SIZE, mad_get_timeout(srcport, rpc->timeout),
78		      0) < 0) {
79		IBWARN("send failed; %s", strerror(errno));
80		return -1;
81	}
82
83	return 0;
84}
85
86int mad_respond(void *umad, ib_portid_t * portid, uint32_t rstatus)
87{
88	return mad_respond_via(umad, portid, rstatus, ibmp);
89}
90
91int mad_respond_via(void *umad, ib_portid_t * portid, uint32_t rstatus,
92		    struct ibmad_port *srcport)
93{
94	uint8_t *mad = umad_get_mad(umad);
95	ib_mad_addr_t *mad_addr;
96	ib_rpc_t rpc = { 0 };
97	ib_portid_t rport;
98	int is_smi;
99
100	if (!portid) {
101		if (!(mad_addr = umad_get_mad_addr(umad))) {
102			errno = EINVAL;
103			return -1;
104		}
105
106		memset(&rport, 0, sizeof(rport));
107
108		rport.lid = ntohs(mad_addr->lid);
109		rport.qp = ntohl(mad_addr->qpn);
110		rport.qkey = ntohl(mad_addr->qkey);
111		rport.sl = mad_addr->sl;
112
113		if (mad_addr->grh_present) {
114			rport.grh_present = 1;
115			memcpy(&rport.gid, &mad_addr->gid, sizeof(rport.gid));
116		}
117
118		portid = &rport;
119	}
120
121	DEBUG("dest %s", portid2str(portid));
122
123	rpc.mgtclass = mad_get_field(mad, 0, IB_MAD_MGMTCLASS_F);
124
125	rpc.method = mad_get_field(mad, 0, IB_MAD_METHOD_F);
126	if (rpc.method == IB_MAD_METHOD_SET)
127		rpc.method = IB_MAD_METHOD_GET;
128	if (rpc.method != IB_MAD_METHOD_SEND)
129		rpc.method |= IB_MAD_RESPONSE;
130
131	rpc.attr.id = mad_get_field(mad, 0, IB_MAD_ATTRID_F);
132	rpc.attr.mod = mad_get_field(mad, 0, IB_MAD_ATTRMOD_F);
133	if (rpc.mgtclass == IB_SA_CLASS)
134		rpc.recsz = mad_get_field(mad, 0, IB_SA_ATTROFFS_F);
135	if (mad_is_vendor_range2(rpc.mgtclass))
136		rpc.oui = mad_get_field(mad, 0, IB_VEND2_OUI_F);
137
138	rpc.trid = mad_get_field64(mad, 0, IB_MAD_TRID_F);
139	rpc.rstatus = rstatus;
140
141	/* cleared by default: timeout, datasz, dataoffs, mkey, mask */
142
143	is_smi = rpc.mgtclass == IB_SMI_CLASS ||
144	    rpc.mgtclass == IB_SMI_DIRECT_CLASS;
145
146	if (is_smi)
147		portid->qp = 0;
148	else if (!portid->qp)
149		portid->qp = 1;
150
151	if (!portid->qkey && portid->qp == 1)
152		portid->qkey = IB_DEFAULT_QP1_QKEY;
153
154	DEBUG
155	    ("qp 0x%x class 0x%x method %d attr 0x%x mod 0x%x datasz %d off %d qkey %x",
156	     portid->qp, rpc.mgtclass, rpc.method, rpc.attr.id, rpc.attr.mod,
157	     rpc.datasz, rpc.dataoffs, portid->qkey);
158
159	if (mad_build_pkt(umad, &rpc, portid, 0, 0) < 0)
160		return -1;
161
162	if (ibdebug > 1)
163		xdump(stderr, "mad respond pkt\n", mad, IB_MAD_SIZE);
164
165	if (umad_send
166	    (srcport->port_id, srcport->class_agents[rpc.mgtclass], umad,
167	     IB_MAD_SIZE, mad_get_timeout(srcport, rpc.timeout), 0) < 0) {
168		DEBUG("send failed; %s", strerror(errno));
169		return -1;
170	}
171
172	return 0;
173}
174
175void *mad_receive(void *umad, int timeout)
176{
177	return mad_receive_via(umad, timeout, ibmp);
178}
179
180void *mad_receive_via(void *umad, int timeout, struct ibmad_port *srcport)
181{
182	void *mad = umad ? umad : umad_alloc(1, umad_size() + IB_MAD_SIZE);
183	int agent;
184	int length = IB_MAD_SIZE;
185
186	if ((agent = umad_recv(srcport->port_id, mad, &length,
187			       mad_get_timeout(srcport, timeout))) < 0) {
188		if (!umad)
189			umad_free(mad);
190		DEBUG("recv failed: %s", strerror(errno));
191		return 0;
192	}
193
194	return mad;
195}
196
197void *mad_alloc(void)
198{
199	return umad_alloc(1, umad_size() + IB_MAD_SIZE);
200}
201
202void mad_free(void *umad)
203{
204	umad_free(umad);
205}
206