1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause OR GPL-2.0
3 *
4 * Copyright (c) 2004 Mellanox Technologies Ltd. All rights reserved.
5 * Copyright (c) 2004 Infinicon Corporation. All rights reserved.
6 * Copyright (c) 2004 Intel Corporation. All rights reserved.
7 * Copyright (c) 2004 Topspin Corporation. All rights reserved.
8 * Copyright (c) 2004-2007 Voltaire Corporation. All rights reserved.
9 *
10 * This software is available to you under a choice of one of two
11 * licenses. You may choose to be licensed under the terms of the GNU
12 * General Public License (GPL) Version 2, available from the file
13 * COPYING in the main directory of this source tree, or the
14 * OpenIB.org BSD license below:
15 *
16 * Redistribution and use in source and binary forms, with or
17 * without modification, are permitted provided that the following
18 * conditions are met:
19 *
20 * - Redistributions of source code must retain the above
21 * copyright notice, this list of conditions and the following
22 * disclaimer.
23 *
24 * - Redistributions in binary form must reproduce the above
25 * copyright notice, this list of conditions and the following
26 * disclaimer in the documentation and/or other materials
27 * provided with the distribution.
28 *
29 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
30 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
31 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
32 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
33 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
34 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
35 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
36 * SOFTWARE.
37 */
38
39 #ifndef __SMI_H_
40 #define __SMI_H_
41
42 #include <rdma/ib_smi.h>
43
44 enum smi_action {
45 IB_SMI_DISCARD,
46 IB_SMI_HANDLE
47 };
48
49 enum 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
55 enum smi_action smi_handle_dr_smp_recv(struct ib_smp *smp, bool is_switch,
56 int port_num, int phys_port_cnt);
57 int smi_get_fwd_port(struct ib_smp *smp);
58 extern enum smi_forward_action smi_check_forward_dr_smp(struct ib_smp *smp);
59 extern 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 */
smi_check_local_smp(struct ib_smp * smp,struct ib_device * device)66 static 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 */
smi_check_local_returning_smp(struct ib_smp * smp,struct ib_device * device)81 static 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