drivers/infiniband/hw/hfi1/trace_dbg.h

   1 /*
   2 * Copyright(c) 2015, 2016 Intel Corporation.
   3 *
   4 * This file is provided under a dual BSD/GPLv2 license.  When using or
   5 * redistributing this file, you may do so under either license.
   6 *
   7 * GPL LICENSE SUMMARY
   8 *
   9 * This program is free software; you can redistribute it and/or modify
  10 * it under the terms of version 2 of the GNU General Public License as
  11 * published by the Free Software Foundation.
  12 *
  13 * This program is distributed in the hope that it will be useful, but
  14 * WITHOUT ANY WARRANTY; without even the implied warranty of
  15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16 * General Public License for more details.
  17 *
  18 * BSD LICENSE
  19 *
  20 * Redistribution and use in source and binary forms, with or without
  21 * modification, are permitted provided that the following conditions
  22 * are met:
  23 *
  24 *  - Redistributions of source code must retain the above copyright
  25 *    notice, this list of conditions and the following disclaimer.
  26 *  - Redistributions in binary form must reproduce the above copyright
  27 *    notice, this list of conditions and the following disclaimer in
  28 *    the documentation and/or other materials provided with the
  29 *    distribution.
  30 *  - Neither the name of Intel Corporation nor the names of its
  31 *    contributors may be used to endorse or promote products derived
  32 *    from this software without specific prior written permission.
  33 *
  34 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  35 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  36 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  37 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  38 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  39 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  40 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  41 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  42 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  43 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  44 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  45 *
  46 */
  47 #if !defined(__HFI1_TRACE_EXTRA_H) || defined(TRACE_HEADER_MULTI_READ)
  48 #define __HFI1_TRACE_EXTRA_H
  49
  50 #include <linux/tracepoint.h>
  51 #include <linux/trace_seq.h>
  52
  53 #include "hfi.h"
  54
  55 /*
  56  * Note:
  57  * This produces a REALLY ugly trace in the console output when the string is
  58  * too long.
  59  */
  60
  61 #undef TRACE_SYSTEM
  62 #define TRACE_SYSTEM hfi1_dbg
  63
  64 #define MAX_MSG_LEN 512
  65
  66 DECLARE_EVENT_CLASS(hfi1_trace_template,
  67                     TP_PROTO(const char *function, struct va_format *vaf),
  68                     TP_ARGS(function, vaf),
  69                     TP_STRUCT__entry(__string(function, function)
  70                                      __dynamic_array(char, msg, MAX_MSG_LEN)
  71                                      ),
  72                     TP_fast_assign(__assign_str(function, function);
  73                                    WARN_ON_ONCE(vsnprintf
  74                                                 (__get_dynamic_array(msg),
  75                                                  MAX_MSG_LEN, vaf->fmt,
  76                                                  *vaf->va) >=
  77                                                 MAX_MSG_LEN);
  78                                    ),
  79                     TP_printk("(%s) %s",
  80                               __get_str(function),
  81                               __get_str(msg))
  82 );
  83
  84 /*
  85  * It may be nice to macroize the __hfi1_trace but the va_* stuff requires an
  86  * actual function to work and can not be in a macro.
  87  */
  88 #define __hfi1_trace_def(lvl) \
  89 void __hfi1_trace_##lvl(const char *funct, char *fmt, ...);             \
  90                                                                         \
  91 DEFINE_EVENT(hfi1_trace_template, hfi1_ ##lvl,                          \
  92         TP_PROTO(const char *function, struct va_format *vaf),          \
  93         TP_ARGS(function, vaf))
  94
  95 #define __hfi1_trace_fn(lvl) \
  96 void __hfi1_trace_##lvl(const char *func, char *fmt, ...)               \
  97 {                                                                       \
  98         struct va_format vaf = {                                        \
  99                 .fmt = fmt,                                             \
 100         };                                                              \
 101         va_list args;                                                   \
 102                                                                         \
 103         va_start(args, fmt);                                            \
 104         vaf.va = &args;                                                 \
 105         trace_hfi1_ ##lvl(func, &vaf);                                  \
 106         va_end(args);                                                   \
 107         return;                                                         \
 108 }
 109
 110 /*
 111  * To create a new trace level simply define it below and as a __hfi1_trace_fn
 112  * in trace.c. This will create all the hooks for calling
 113  * hfi1_cdbg(LVL, fmt, ...); as well as take care of all
 114  * the debugfs stuff.
 115  */
 116 __hfi1_trace_def(PKT);
 117 __hfi1_trace_def(PROC);
 118 __hfi1_trace_def(SDMA);
 119 __hfi1_trace_def(LINKVERB);
 120 __hfi1_trace_def(DEBUG);
 121 __hfi1_trace_def(SNOOP);
 122 __hfi1_trace_def(CNTR);
 123 __hfi1_trace_def(PIO);
 124 __hfi1_trace_def(DC8051);
 125 __hfi1_trace_def(FIRMWARE);
 126 __hfi1_trace_def(RCVCTRL);
 127 __hfi1_trace_def(TID);
 128 __hfi1_trace_def(MMU);
 129 __hfi1_trace_def(IOCTL);
 130
 131 #define hfi1_cdbg(which, fmt, ...) \
 132         __hfi1_trace_##which(__func__, fmt, ##__VA_ARGS__)
 133
 134 #define hfi1_dbg(fmt, ...) \
 135         hfi1_cdbg(DEBUG, fmt, ##__VA_ARGS__)
 136
 137 /*
 138  * Define HFI1_EARLY_DBG at compile time or here to enable early trace
 139  * messages. Do not check in an enablement for this.
 140  */
 141
 142 #ifdef HFI1_EARLY_DBG
 143 #define hfi1_dbg_early(fmt, ...) \
 144         trace_printk(fmt, ##__VA_ARGS__)
 145 #else
 146 #define hfi1_dbg_early(fmt, ...)
 147 #endif
 148
 149 #endif /* __HFI1_TRACE_EXTRA_H */
 150
 151 #undef TRACE_INCLUDE_PATH
 152 #undef TRACE_INCLUDE_FILE
 153 #define TRACE_INCLUDE_PATH .
 154 #define TRACE_INCLUDE_FILE trace_dbg
 155 #include <trace/define_trace.h>