arch/powerpc/perf/req-gen/perf.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef LINUX_POWERPC_PERF_REQ_GEN_PERF_H_
   3 #define LINUX_POWERPC_PERF_REQ_GEN_PERF_H_
   4
   5 #include <linux/perf_event.h>
   6
   7 #ifndef REQUEST_FILE
   8 #error "REQUEST_FILE must be defined before including"
   9 #endif
  10
  11 #ifndef NAME_LOWER
  12 #error "NAME_LOWER must be defined before including"
  13 #endif
  14
  15 #ifndef NAME_UPPER
  16 #error "NAME_UPPER must be defined before including"
  17 #endif
  18
  19 #define BE_TYPE_b1 __u8
  20 #define BE_TYPE_b2 __be16
  21 #define BE_TYPE_b4 __be32
  22 #define BE_TYPE_b8 __be64
  23
  24 #define BYTES_TO_BE_TYPE(bytes) \
  25                 BE_TYPE_b##bytes
  26
  27 #define CAT2_(a, b) a ## b
  28 #define CAT2(a, b) CAT2_(a, b)
  29 #define CAT3_(a, b, c) a ## b ## c
  30 #define CAT3(a, b, c) CAT3_(a, b, c)
  31
  32 /*
  33  * enumerate the request values as
  34  * <NAME_UPPER>_<request name> = <request value>
  35  */
  36 #define REQUEST_VALUE__(name_upper, r_name) name_upper ## _ ## r_name
  37 #define REQUEST_VALUE_(name_upper, r_name) REQUEST_VALUE__(name_upper, r_name)
  38 #define REQUEST_VALUE(r_name) REQUEST_VALUE_(NAME_UPPER, r_name)
  39
  40 #include "_clear.h"
  41 #define REQUEST_(r_name, r_value, r_idx_1, r_fields) \
  42         REQUEST_VALUE(r_name) = r_value,
  43 enum CAT2(NAME_LOWER, _requests) {
  44 #include REQUEST_FILE
  45 };
  46
  47 /*
  48  * For each request:
  49  * struct <NAME_LOWER>_<request name> {
  50  *      r_fields
  51  * };
  52  */
  53 #include "_clear.h"
  54 #define STRUCT_NAME__(name_lower, r_name) name_lower ## _ ## r_name
  55 #define STRUCT_NAME_(name_lower, r_name) STRUCT_NAME__(name_lower, r_name)
  56 #define STRUCT_NAME(r_name) STRUCT_NAME_(NAME_LOWER, r_name)
  57 #define REQUEST_(r_name, r_value, r_idx_1, r_fields)    \
  58 struct STRUCT_NAME(r_name) {                            \
  59         r_fields                                        \
  60 };
  61 #define __field_(r_name, r_value, r_idx_1, f_offset, f_bytes, f_name) \
  62         BYTES_TO_BE_TYPE(f_bytes) f_name;
  63 #define __count_(r_name, r_value, r_idx_1, f_offset, f_bytes, f_name) \
  64         __field_(r_name, r_value, r_idx_1, f_offset, f_bytes, f_name)
  65 #define __array_(r_name, r_value, r_idx_1, a_offset, a_bytes, a_name) \
  66         __u8 a_name[a_bytes];
  67
  68 #include REQUEST_FILE
  69
  70 /*
  71  * Generate a check of the field offsets
  72  * <NAME_LOWER>_assert_offsets_correct()
  73  */
  74 #include "_clear.h"
  75 #define REQUEST_(r_name, r_value, index, r_fields)                      \
  76 r_fields
  77 #define __field_(r_name, r_value, r_idx_1, f_offset, f_size, f_name) \
  78         BUILD_BUG_ON(offsetof(struct STRUCT_NAME(r_name), f_name) != f_offset);
  79 #define __count_(r_name, r_value, r_idx_1, c_offset, c_size, c_name) \
  80         __field_(r_name, r_value, r_idx_1, c_offset, c_size, c_name)
  81 #define __array_(r_name, r_value, r_idx_1, a_offset, a_size, a_name) \
  82         __field_(r_name, r_value, r_idx_1, a_offset, a_size, a_name)
  83
  84 static inline void CAT2(NAME_LOWER, _assert_offsets_correct)(void)
  85 {
  86 #include REQUEST_FILE
  87 }
  88
  89 /*
  90  * Generate event attributes:
  91  * PMU_EVENT_ATTR_STRING(<request name>_<field name>,
  92  *      <NAME_LOWER>_event_attr_<request name>_<field name>,
  93  *              "request=<request value>"
  94  *              "starting_index=<starting index type>"
  95  *              "counter_info_version=CURRENT_COUNTER_INFO_VERSION"
  96  *              "length=<f_size>"
  97  *              "offset=<f_offset>")
  98  *
  99  *      TODO: counter_info_version may need to vary, we should interperate the
 100  *      value to some extent
 101  */
 102 #define EVENT_ATTR_NAME__(name, r_name, c_name) \
 103         name ## _event_attr_ ## r_name ## _ ## c_name
 104 #define EVENT_ATTR_NAME_(name, r_name, c_name) \
 105         EVENT_ATTR_NAME__(name, r_name, c_name)
 106 #define EVENT_ATTR_NAME(r_name, c_name) \
 107         EVENT_ATTR_NAME_(NAME_LOWER, r_name, c_name)
 108
 109 #include "_clear.h"
 110 #define __field_(r_name, r_value, r_idx_1, f_offset, f_size, f_name)
 111 #define __array_(r_name, r_value, r_idx_1, a_offset, a_size, a_name)
 112 #define __count_(r_name, r_value, r_idx_1, c_offset, c_size, c_name)    \
 113 PMU_EVENT_ATTR_STRING(                                                  \
 114                 CAT3(r_name, _, c_name),                                \
 115                 EVENT_ATTR_NAME(r_name, c_name),                        \
 116                 "request=" __stringify(r_value) ","                     \
 117                 r_idx_1 ","                                             \
 118                 "counter_info_version="                                 \
 119                         __stringify(COUNTER_INFO_VERSION_CURRENT) ","   \
 120                 "length=" #c_size ","                                   \
 121                 "offset=" #c_offset)
 122 #define REQUEST_(r_name, r_value, r_idx_1, r_fields)                    \
 123         r_fields
 124
 125 #include REQUEST_FILE
 126
 127 /*
 128  * Define event attribute array
 129  * static struct attribute *hv_gpci_event_attrs[] = {
 130  *      &<NAME_LOWER>_event_attr_<request name>_<field name>.attr,
 131  * };
 132  */
 133 #include "_clear.h"
 134 #define __field_(r_name, r_value, r_idx_1, f_offset, f_size, f_name)
 135 #define __count_(r_name, r_value, r_idx_1, c_offset, c_size, c_name)    \
 136         &EVENT_ATTR_NAME(r_name, c_name).attr.attr,
 137 #define __array_(r_name, r_value, r_idx_1, a_offset, a_size, a_name)
 138 #define REQUEST_(r_name, r_value, r_idx_1, r_fields)                    \
 139         r_fields
 140
 141 static __maybe_unused struct attribute *hv_gpci_event_attrs[] = {
 142 #include REQUEST_FILE
 143         NULL
 144 };
 145
 146 /* cleanup */
 147 #include "_clear.h"
 148 #undef EVENT_ATTR_NAME
 149 #undef EVENT_ATTR_NAME_
 150 #undef BIT_NAME
 151 #undef BIT_NAME_
 152 #undef STRUCT_NAME
 153 #undef REQUEST_VALUE
 154 #undef REQUEST_VALUE_
 155
 156 #endif