1 #ifndef _HFI1_FAULT_H
2 #define _HFI1_FAULT_H
3 /*
4 * Copyright(c) 2018 Intel Corporation.
5 *
6 * This file is provided under a dual BSD/GPLv2 license. When using or
7 * redistributing this file, you may do so under either license.
8 *
9 * GPL LICENSE SUMMARY
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of version 2 of the GNU General Public License as
13 * published by the Free Software Foundation.
14 *
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * BSD LICENSE
21 *
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
24 * are met:
25 *
26 * - Redistributions of source code must retain the above copyright
27 * notice, this list of conditions and the following disclaimer.
28 * - Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in
30 * the documentation and/or other materials provided with the
31 * distribution.
32 * - Neither the name of Intel Corporation nor the names of its
33 * contributors may be used to endorse or promote products derived
34 * from this software without specific prior written permission.
35 *
36 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
37 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
38 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
39 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
40 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
41 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
42 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
43 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
44 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
45 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
46 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
47 *
48 */
49 #include <linux/fault-inject.h>
50 #include <linux/dcache.h>
51 #include <linux/bitops.h>
52 #include <linux/kernel.h>
53 #include <rdma/rdma_vt.h>
54
55 #include "hfi.h"
56
57 struct hfi1_ibdev;
58
59 #if defined(CONFIG_FAULT_INJECTION) && defined(CONFIG_FAULT_INJECTION_DEBUG_FS)
60 struct fault {
61 struct fault_attr attr;
62 struct dentry *dir;
63 u64 n_rxfaults[(1U << BITS_PER_BYTE)];
64 u64 n_txfaults[(1U << BITS_PER_BYTE)];
65 u64 fault_skip;
66 u64 skip;
67 u64 fault_skip_usec;
68 unsigned long skip_usec;
69 unsigned long opcodes[(1U << BITS_PER_BYTE) / BITS_PER_LONG];
70 bool enable;
71 bool suppress_err;
72 bool opcode;
73 u8 direction;
74 };
75
76 int hfi1_fault_init_debugfs(struct hfi1_ibdev *ibd);
77 bool hfi1_dbg_should_fault_tx(struct rvt_qp *qp, u32 opcode);
78 bool hfi1_dbg_should_fault_rx(struct hfi1_packet *packet);
79 bool hfi1_dbg_fault_suppress_err(struct hfi1_ibdev *ibd);
80 void hfi1_fault_exit_debugfs(struct hfi1_ibdev *ibd);
81
82 #else
83
84 static inline int hfi1_fault_init_debugfs(struct hfi1_ibdev *ibd)
85 {
86 return 0;
87 }
88
89 static inline bool hfi1_dbg_should_fault_rx(struct hfi1_packet *packet)
90 {
91 return false;
92 }
93
94 static inline bool hfi1_dbg_should_fault_tx(struct rvt_qp *qp,
95 u32 opcode)
96 {
97 return false;
98 }
99
100 static inline bool hfi1_dbg_fault_suppress_err(struct hfi1_ibdev *ibd)
101 {
102 return false;
103 }
104
105 static inline void hfi1_fault_exit_debugfs(struct hfi1_ibdev *ibd)
106 {
107 }
108 #endif
109 #endif /* _HFI1_FAULT_H */