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

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