drivers/infiniband/hw/hfi1/fault.h

   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 */