| 1 | /* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only) |
| 2 | * |
| 3 | * counter/counter-types.h |
| 4 | * |
| 5 | * LTTng Counters Types |
| 6 | * |
| 7 | * Copyright (C) 2020 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 8 | */ |
| 9 | |
| 10 | #ifndef _LTTNG_COUNTER_TYPES_H |
| 11 | #define _LTTNG_COUNTER_TYPES_H |
| 12 | |
| 13 | #include <linux/types.h> |
| 14 | #include <linux/percpu.h> |
| 15 | #include <counter/config.h> |
| 16 | |
| 17 | struct lib_counter_dimension { |
| 18 | /* |
| 19 | * Max. number of indexable elements. |
| 20 | */ |
| 21 | size_t max_nr_elem; |
| 22 | /* |
| 23 | * The stride for a dimension is the multiplication factor which |
| 24 | * should be applied to its index to take into account other |
| 25 | * dimensions nested inside. |
| 26 | */ |
| 27 | size_t stride; |
| 28 | }; |
| 29 | |
| 30 | struct lib_counter_layout { |
| 31 | void *counters; |
| 32 | unsigned long *underflow_bitmap; |
| 33 | unsigned long *overflow_bitmap; |
| 34 | }; |
| 35 | |
| 36 | enum lib_counter_arithmetic { |
| 37 | LIB_COUNTER_ARITHMETIC_MODULAR, |
| 38 | LIB_COUNTER_ARITHMETIC_SATURATE, |
| 39 | }; |
| 40 | |
| 41 | struct lib_counter { |
| 42 | size_t nr_dimensions; |
| 43 | int64_t allocated_elem; |
| 44 | struct lib_counter_dimension *dimensions; |
| 45 | enum lib_counter_arithmetic arithmetic; |
| 46 | union { |
| 47 | struct { |
| 48 | int32_t max, min; |
| 49 | } limits_32_bit; |
| 50 | struct { |
| 51 | int64_t max, min; |
| 52 | } limits_64_bit; |
| 53 | } saturation; |
| 54 | union { |
| 55 | int8_t s8; |
| 56 | int16_t s16; |
| 57 | int32_t s32; |
| 58 | int64_t s64; |
| 59 | } global_sum_step; /* 0 if unused */ |
| 60 | struct lib_counter_config config; |
| 61 | |
| 62 | struct lib_counter_layout global_counters; |
| 63 | struct lib_counter_layout __percpu *percpu_counters; |
| 64 | }; |
| 65 | |
| 66 | #endif /* _LTTNG_COUNTER_TYPES_H */ |