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 */
37
38 #ifndef __SMI_H_
39 #define __SMI_H_
40
41 #include <rdma/ib_smi.h>
42
43 enum smi_action {
44 IB_SMI_DISCARD,
45 IB_SMI_HANDLE
46 };
47
48 enum smi_forward_action {
49 IB_SMI_LOCAL, /* SMP should be completed up the stack */
50 IB_SMI_SEND, /* received DR SMP should be forwarded to the send queue */
51 IB_SMI_FORWARD /* SMP should be forwarded (for switches only) */
52 };
53
54 enum smi_action smi_handle_dr_smp_recv(struct ib_smp *smp, bool is_switch,
55 int port_num, int phys_port_cnt);
56 int smi_get_fwd_port(struct ib_smp *smp);
57 extern enum smi_forward_action smi_check_forward_dr_smp(struct ib_smp *smp);
58 extern enum smi_action smi_handle_dr_smp_send(struct ib_smp *smp,
59 bool is_switch, int port_num);
60
61 /*
62 * Return IB_SMI_HANDLE if the SMP should be handled by the local SMA/SM
63 * via process_mad
64 */
65 static inline enum smi_action smi_check_local_smp(struct ib_smp *smp,
66 struct ib_device *device)
67 {
68 /* C14-9:3 -- We're at the end of the DR segment of path */
69 /* C14-9:4 -- Hop Pointer = Hop Count + 1 -> give to SMA/SM */
70 return ((device->ops.process_mad &&
71 !ib_get_smp_direction(smp) &&
72 (smp->hop_ptr == smp->hop_cnt + 1)) ?
73 IB_SMI_HANDLE : IB_SMI_DISCARD);
74 }
75
76 /*
77 * Return IB_SMI_HANDLE if the SMP should be handled by the local SMA/SM
78 * via process_mad
79 */
80 static inline enum smi_action smi_check_local_returning_smp(struct ib_smp *smp,
81 struct ib_device *device)
82 {
83 /* C14-13:3 -- We're at the end of the DR segment of path */
84 /* C14-13:4 -- Hop Pointer == 0 -> give to SM */
85 return ((device->ops.process_mad &&
86 ib_get_smp_direction(smp) &&
87 !smp->hop_ptr) ? IB_SMI_HANDLE : IB_SMI_DISCARD);
88 }
89
90 #endif /* __SMI_H_ */