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 <string.h>
39
40#include <infiniband/mad.h>
41
42#undef DEBUG
43#define DEBUG 	if (ibdebug)	IBWARN
44
45static inline int response_expected(int method)
46{
47	return method == IB_MAD_METHOD_GET ||
48	    method == IB_MAD_METHOD_SET || method == IB_MAD_METHOD_TRAP;
49}
50
51uint8_t *bm_call_via(void *data, ib_portid_t * portid, ib_bm_call_t * call,
52		     struct ibmad_port * srcport)
53{
54	ib_rpc_t rpc = { 0 };
55	int resp_expected;
56	struct {
57		uint64_t bkey;
58		uint8_t reserved[32];
59		uint8_t data[IB_BM_DATA_SZ];
60	} bm_data;
61
62	DEBUG("route %s data %p", portid2str(portid), data);
63	if (portid->lid <= 0) {
64		IBWARN("only lid routes are supported");
65		return NULL;
66	}
67
68	resp_expected = response_expected(call->method);
69
70	rpc.mgtclass = IB_BOARD_MGMT_CLASS;
71
72	rpc.method = call->method;
73	rpc.attr.id = call->attrid;
74	rpc.attr.mod = call->mod;
75	rpc.timeout = resp_expected ? call->timeout : 0;
76	// send data and bkey
77	rpc.datasz = IB_BM_BKEY_AND_DATA_SZ;
78	rpc.dataoffs = IB_BM_BKEY_OFFS;
79
80	// copy data to a buffer which also includes the bkey
81	bm_data.bkey = htonll(call->bkey);
82	memset(bm_data.reserved, 0, sizeof(bm_data.reserved));
83	memcpy(bm_data.data, data, IB_BM_DATA_SZ);
84
85	DEBUG
86	    ("method 0x%x attr 0x%x mod 0x%x datasz %d off %d res_ex %d bkey 0x%08x%08x",
87	     rpc.method, rpc.attr.id, rpc.attr.mod, rpc.datasz, rpc.dataoffs,
88	     resp_expected, (int)(call->bkey >> 32), (int)call->bkey);
89
90	portid->qp = 1;
91	if (!portid->qkey)
92		portid->qkey = IB_DEFAULT_QP1_QKEY;
93
94	if (resp_expected) {
95		/* FIXME: no RMPP for now */
96		if (mad_rpc(srcport, &rpc, portid, &bm_data, &bm_data))
97			goto return_ok;
98		return NULL;
99	}
100
101	if (mad_send_via(&rpc, portid, 0, &bm_data, srcport) < 0)
102		return NULL;
103
104return_ok:
105	memcpy(data, bm_data.data, IB_BM_DATA_SZ);
106	return data;
107}
108