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 #include <linux/stringify.h>
7
8 #ifndef REQUEST_FILE
9 #error "REQUEST_FILE must be defined before including"
10 #endif
11
12 #ifndef NAME_LOWER
13 #error "NAME_LOWER must be defined before including"
14 #endif
15
16 #ifndef NAME_UPPER
17 #error "NAME_UPPER must be defined before including"
18 #endif
19
20 #define BE_TYPE_b1 __u8
21 #define BE_TYPE_b2 __be16
22 #define BE_TYPE_b4 __be32
23 #define BE_TYPE_b8 __be64
24
25 #define BYTES_TO_BE_TYPE(bytes) \
26 BE_TYPE_b##bytes
27
28 #define CAT2_(a, b) a ## b
29 #define CAT2(a, b) CAT2_(a, b)
30 #define CAT3_(a, b, c) a ## b ## c
31 #define CAT3(a, b, c) CAT3_(a, b, c)
32
33 /*
34 * enumerate the request values as
35 * <NAME_UPPER>_<request name> = <request value>
36 */
37 #define REQUEST_VALUE__(name_upper, r_name) name_upper ## _ ## r_name
38 #define REQUEST_VALUE_(name_upper, r_name) REQUEST_VALUE__(name_upper, r_name)
39 #define REQUEST_VALUE(r_name) REQUEST_VALUE_(NAME_UPPER, r_name)
40
41 #include "_clear.h"
42 #define REQUEST_(r_name, r_value, r_idx_1, r_fields) \
43 REQUEST_VALUE(r_name) = r_value,
CAT2(NAME_LOWER,_requests)44 enum CAT2(NAME_LOWER, _requests) {
45 #include REQUEST_FILE
46 };
47
48 /*
49 * For each request:
50 * struct <NAME_LOWER>_<request name> {
51 * r_fields
52 * };
53 */
54 #include "_clear.h"
55 #define STRUCT_NAME__(name_lower, r_name) name_lower ## _ ## r_name
56 #define STRUCT_NAME_(name_lower, r_name) STRUCT_NAME__(name_lower, r_name)
57 #define STRUCT_NAME(r_name) STRUCT_NAME_(NAME_LOWER, r_name)
58 #define REQUEST_(r_name, r_value, r_idx_1, r_fields) \
59 struct STRUCT_NAME(r_name) { \
60 r_fields \
61 };
62 #define __field_(r_name, r_value, r_idx_1, f_offset, f_bytes, f_name) \
63 BYTES_TO_BE_TYPE(f_bytes) f_name;
64 #define __count_(r_name, r_value, r_idx_1, f_offset, f_bytes, f_name) \
65 __field_(r_name, r_value, r_idx_1, f_offset, f_bytes, f_name)
66 #define __array_(r_name, r_value, r_idx_1, a_offset, a_bytes, a_name) \
67 __u8 a_name[a_bytes];
68
69 #include REQUEST_FILE
70
71 /*
72 * Generate a check of the field offsets
73 * <NAME_LOWER>_assert_offsets_correct()
74 */
75 #include "_clear.h"
76 #define REQUEST_(r_name, r_value, index, r_fields) \
77 r_fields
78 #define __field_(r_name, r_value, r_idx_1, f_offset, f_size, f_name) \
79 BUILD_BUG_ON(offsetof(struct STRUCT_NAME(r_name), f_name) != f_offset);
80 #define __count_(r_name, r_value, r_idx_1, c_offset, c_size, c_name) \
81 __field_(r_name, r_value, r_idx_1, c_offset, c_size, c_name)
82 #define __array_(r_name, r_value, r_idx_1, a_offset, a_size, a_name) \
83 __field_(r_name, r_value, r_idx_1, a_offset, a_size, a_name)
84
CAT2(NAME_LOWER,_assert_offsets_correct)85 static inline void CAT2(NAME_LOWER, _assert_offsets_correct)(void)
86 {
87 #include REQUEST_FILE
88 }
89
90 /*
91 * Generate event attributes:
92 * PMU_EVENT_ATTR_STRING(<request name>_<field name>,
93 * <NAME_LOWER>_event_attr_<request name>_<field name>,
94 * "request=<request value>"
95 * "starting_index=<starting index type>"
96 * "counter_info_version=CURRENT_COUNTER_INFO_VERSION"
97 * "length=<f_size>"
98 * "offset=<f_offset>")
99 *
100 * TODO: counter_info_version may need to vary, we should interperate the
101 * value to some extent
102 */
103 #define EVENT_ATTR_NAME__(name, r_name, c_name) \
104 name ## _event_attr_ ## r_name ## _ ## c_name
105 #define EVENT_ATTR_NAME_(name, r_name, c_name) \
106 EVENT_ATTR_NAME__(name, r_name, c_name)
107 #define EVENT_ATTR_NAME(r_name, c_name) \
108 EVENT_ATTR_NAME_(NAME_LOWER, r_name, c_name)
109
110 #include "_clear.h"
111 #define __field_(r_name, r_value, r_idx_1, f_offset, f_size, f_name)
112 #define __array_(r_name, r_value, r_idx_1, a_offset, a_size, a_name)
113 #define __count_(r_name, r_value, r_idx_1, c_offset, c_size, c_name) \
114 PMU_EVENT_ATTR_STRING( \
115 CAT3(r_name, _, c_name), \
116 EVENT_ATTR_NAME(r_name, c_name), \
117 "request=" __stringify(r_value) "," \
118 r_idx_1 "," \
119 "counter_info_version=" \
120 __stringify(COUNTER_INFO_VERSION_CURRENT) "," \
121 "length=" #c_size "," \
122 "offset=" #c_offset)
123 #define REQUEST_(r_name, r_value, r_idx_1, r_fields) \
124 r_fields
125
126 #include REQUEST_FILE
127
128 /*
129 * Define event attribute array
130 * static struct attribute *hv_gpci_event_attrs[] = {
131 * &<NAME_LOWER>_event_attr_<request name>_<field name>.attr,
132 * };
133 */
134 #include "_clear.h"
135 #define __field_(r_name, r_value, r_idx_1, f_offset, f_size, f_name)
136 #define __count_(r_name, r_value, r_idx_1, c_offset, c_size, c_name) \
137 &EVENT_ATTR_NAME(r_name, c_name).attr.attr,
138 #define __array_(r_name, r_value, r_idx_1, a_offset, a_size, a_name)
139 #define REQUEST_(r_name, r_value, r_idx_1, r_fields) \
140 r_fields
141
142 /* Generate event list for platforms with counter_info_version 0x6 or below */
143 static __maybe_unused struct attribute *hv_gpci_event_attrs_v6[] = {
144 #include REQUEST_FILE
145 NULL
146 };
147
148 /*
149 * Based on getPerfCountInfo v1.018 documentation, some of the hv-gpci
150 * events were deprecated for platform firmware that supports
151 * counter_info_version 0x8 or above.
152 * Those deprecated events are still part of platform firmware that
153 * support counter_info_version 0x6 and below. As per the getPerfCountInfo
154 * v1.018 documentation there is no counter_info_version 0x7.
155 * Undefining macro ENABLE_EVENTS_COUNTERINFO_V6, to disable the addition of
156 * deprecated events in "hv_gpci_event_attrs" attribute group, for platforms
157 * that supports counter_info_version 0x8 or above.
158 */
159 #undef ENABLE_EVENTS_COUNTERINFO_V6
160
161 /* Generate event list for platforms with counter_info_version 0x8 or above*/
162 static __maybe_unused struct attribute *hv_gpci_event_attrs[] = {
163 #include REQUEST_FILE
164 NULL
165 };
166
167 /* cleanup */
168 #include "_clear.h"
169 #undef EVENT_ATTR_NAME
170 #undef EVENT_ATTR_NAME_
171 #undef BIT_NAME
172 #undef BIT_NAME_
173 #undef STRUCT_NAME
174 #undef REQUEST_VALUE
175 #undef REQUEST_VALUE_
176
177 #endif
178