1*4882a593Smuzhiyun /* SPDX-License-Identifier: LGPL-2.1 */ 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * Copyright (C) 2012 Red Hat Inc, Steven Rostedt <srostedt@redhat.com> 4*4882a593Smuzhiyun * 5*4882a593Smuzhiyun */ 6*4882a593Smuzhiyun #ifndef _KBUFFER_H 7*4882a593Smuzhiyun #define _KBUFFER_H 8*4882a593Smuzhiyun 9*4882a593Smuzhiyun #ifndef TS_SHIFT 10*4882a593Smuzhiyun #define TS_SHIFT 27 11*4882a593Smuzhiyun #endif 12*4882a593Smuzhiyun 13*4882a593Smuzhiyun enum kbuffer_endian { 14*4882a593Smuzhiyun KBUFFER_ENDIAN_BIG, 15*4882a593Smuzhiyun KBUFFER_ENDIAN_LITTLE, 16*4882a593Smuzhiyun }; 17*4882a593Smuzhiyun 18*4882a593Smuzhiyun enum kbuffer_long_size { 19*4882a593Smuzhiyun KBUFFER_LSIZE_4, 20*4882a593Smuzhiyun KBUFFER_LSIZE_8, 21*4882a593Smuzhiyun }; 22*4882a593Smuzhiyun 23*4882a593Smuzhiyun enum { 24*4882a593Smuzhiyun KBUFFER_TYPE_PADDING = 29, 25*4882a593Smuzhiyun KBUFFER_TYPE_TIME_EXTEND = 30, 26*4882a593Smuzhiyun KBUFFER_TYPE_TIME_STAMP = 31, 27*4882a593Smuzhiyun }; 28*4882a593Smuzhiyun 29*4882a593Smuzhiyun struct kbuffer; 30*4882a593Smuzhiyun 31*4882a593Smuzhiyun struct kbuffer *kbuffer_alloc(enum kbuffer_long_size size, enum kbuffer_endian endian); 32*4882a593Smuzhiyun void kbuffer_free(struct kbuffer *kbuf); 33*4882a593Smuzhiyun int kbuffer_load_subbuffer(struct kbuffer *kbuf, void *subbuffer); 34*4882a593Smuzhiyun void *kbuffer_read_event(struct kbuffer *kbuf, unsigned long long *ts); 35*4882a593Smuzhiyun void *kbuffer_next_event(struct kbuffer *kbuf, unsigned long long *ts); 36*4882a593Smuzhiyun unsigned long long kbuffer_timestamp(struct kbuffer *kbuf); 37*4882a593Smuzhiyun unsigned long long kbuffer_subbuf_timestamp(struct kbuffer *kbuf, void *subbuf); 38*4882a593Smuzhiyun unsigned int kbuffer_ptr_delta(struct kbuffer *kbuf, void *ptr); 39*4882a593Smuzhiyun 40*4882a593Smuzhiyun void *kbuffer_translate_data(int swap, void *data, unsigned int *size); 41*4882a593Smuzhiyun 42*4882a593Smuzhiyun void *kbuffer_read_at_offset(struct kbuffer *kbuf, int offset, unsigned long long *ts); 43*4882a593Smuzhiyun 44*4882a593Smuzhiyun int kbuffer_curr_index(struct kbuffer *kbuf); 45*4882a593Smuzhiyun 46*4882a593Smuzhiyun int kbuffer_curr_offset(struct kbuffer *kbuf); 47*4882a593Smuzhiyun int kbuffer_curr_size(struct kbuffer *kbuf); 48*4882a593Smuzhiyun int kbuffer_event_size(struct kbuffer *kbuf); 49*4882a593Smuzhiyun int kbuffer_missed_events(struct kbuffer *kbuf); 50*4882a593Smuzhiyun int kbuffer_subbuffer_size(struct kbuffer *kbuf); 51*4882a593Smuzhiyun 52*4882a593Smuzhiyun void kbuffer_set_old_format(struct kbuffer *kbuf); 53*4882a593Smuzhiyun int kbuffer_start_of_data(struct kbuffer *kbuf); 54*4882a593Smuzhiyun 55*4882a593Smuzhiyun /* Debugging */ 56*4882a593Smuzhiyun 57*4882a593Smuzhiyun struct kbuffer_raw_info { 58*4882a593Smuzhiyun int type; 59*4882a593Smuzhiyun int length; 60*4882a593Smuzhiyun unsigned long long delta; 61*4882a593Smuzhiyun void *next; 62*4882a593Smuzhiyun }; 63*4882a593Smuzhiyun 64*4882a593Smuzhiyun /* Read raw data */ 65*4882a593Smuzhiyun struct kbuffer_raw_info *kbuffer_raw_get(struct kbuffer *kbuf, void *subbuf, 66*4882a593Smuzhiyun struct kbuffer_raw_info *info); 67*4882a593Smuzhiyun 68*4882a593Smuzhiyun #endif /* _K_BUFFER_H */ 69