1/*
2 * Copyright (c) 2004 Mellanox Technologies Ltd.  All rights reserved.
3 * Copyright (c) 2004 Infinicon Corporation.  All rights reserved.
4 * Copyright (c) 2004 Intel Corporation.  All rights reserved.
5 * Copyright (c) 2004 Topspin Corporation.  All rights reserved.
6 * Copyright (c) 2004-2007 Voltaire Corporation.  All rights reserved.
7 *
8 * This software is available to you under a choice of one of two
9 * licenses.  You may choose to be licensed under the terms of the GNU
10 * General Public License (GPL) Version 2, available from the file
11 * COPYING in the main directory of this source tree, or the
12 * OpenIB.org BSD license below:
13 *
14 *     Redistribution and use in source and binary forms, with or
15 *     without modification, are permitted provided that the following
16 *     conditions are met:
17 *
18 *      - Redistributions of source code must retain the above
19 *        copyright notice, this list of conditions and the following
20 *        disclaimer.
21 *
22 *      - Redistributions in binary form must reproduce the above
23 *        copyright notice, this list of conditions and the following
24 *        disclaimer in the documentation and/or other materials
25 *        provided with the distribution.
26 *
27 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
28 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
29 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
30 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
31 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
32 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
33 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
34 * SOFTWARE.
35 *
36 * $FreeBSD: stable/11/sys/ofed/drivers/infiniband/core/smi.h 331772 2018-03-30 18:17:33Z hselasky $
37 */
38
39#ifndef __SMI_H_
40#define __SMI_H_
41
42#include <rdma/ib_smi.h>
43
44enum smi_action {
45	IB_SMI_DISCARD,
46	IB_SMI_HANDLE
47};
48
49enum smi_forward_action {
50	IB_SMI_LOCAL,	/* SMP should be completed up the stack */
51	IB_SMI_SEND,	/* received DR SMP should be forwarded to the send queue */
52	IB_SMI_FORWARD	/* SMP should be forwarded (for switches only) */
53};
54
55enum smi_action smi_handle_dr_smp_recv(struct ib_smp *smp, bool is_switch,
56				       int port_num, int phys_port_cnt);
57int smi_get_fwd_port(struct ib_smp *smp);
58extern enum smi_forward_action smi_check_forward_dr_smp(struct ib_smp *smp);
59extern enum smi_action smi_handle_dr_smp_send(struct ib_smp *smp,
60					      bool is_switch, int port_num);
61
62/*
63 * Return IB_SMI_HANDLE if the SMP should be handled by the local SMA/SM
64 * via process_mad
65 */
66static inline enum smi_action smi_check_local_smp(struct ib_smp *smp,
67						  struct ib_device *device)
68{
69	/* C14-9:3 -- We're at the end of the DR segment of path */
70	/* C14-9:4 -- Hop Pointer = Hop Count + 1 -> give to SMA/SM */
71	return ((device->process_mad &&
72		!ib_get_smp_direction(smp) &&
73		(smp->hop_ptr == smp->hop_cnt + 1)) ?
74		IB_SMI_HANDLE : IB_SMI_DISCARD);
75}
76
77/*
78 * Return IB_SMI_HANDLE if the SMP should be handled by the local SMA/SM
79 * via process_mad
80 */
81static inline enum smi_action smi_check_local_returning_smp(struct ib_smp *smp,
82						   struct ib_device *device)
83{
84	/* C14-13:3 -- We're at the end of the DR segment of path */
85	/* C14-13:4 -- Hop Pointer == 0 -> give to SM */
86	return ((device->process_mad &&
87		ib_get_smp_direction(smp) &&
88		!smp->hop_ptr) ? IB_SMI_HANDLE : IB_SMI_DISCARD);
89}
90
91#endif	/* __SMI_H_ */
92