1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0-or-later */ 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * Copyright (C) 2014 Sergey Senozhatsky. 4*4882a593Smuzhiyun */ 5*4882a593Smuzhiyun 6*4882a593Smuzhiyun #ifndef _ZCOMP_H_ 7*4882a593Smuzhiyun #define _ZCOMP_H_ 8*4882a593Smuzhiyun #include <linux/local_lock.h> 9*4882a593Smuzhiyun 10*4882a593Smuzhiyun struct zcomp_strm { 11*4882a593Smuzhiyun /* The members ->buffer and ->tfm are protected by ->lock. */ 12*4882a593Smuzhiyun local_lock_t lock; 13*4882a593Smuzhiyun /* compression/decompression buffer */ 14*4882a593Smuzhiyun void *buffer; 15*4882a593Smuzhiyun struct crypto_comp *tfm; 16*4882a593Smuzhiyun }; 17*4882a593Smuzhiyun 18*4882a593Smuzhiyun /* dynamic per-device compression frontend */ 19*4882a593Smuzhiyun struct zcomp { 20*4882a593Smuzhiyun struct zcomp_strm __percpu *stream; 21*4882a593Smuzhiyun const char *name; 22*4882a593Smuzhiyun struct hlist_node node; 23*4882a593Smuzhiyun }; 24*4882a593Smuzhiyun 25*4882a593Smuzhiyun int zcomp_cpu_up_prepare(unsigned int cpu, struct hlist_node *node); 26*4882a593Smuzhiyun int zcomp_cpu_dead(unsigned int cpu, struct hlist_node *node); 27*4882a593Smuzhiyun ssize_t zcomp_available_show(const char *comp, char *buf); 28*4882a593Smuzhiyun bool zcomp_available_algorithm(const char *comp); 29*4882a593Smuzhiyun 30*4882a593Smuzhiyun struct zcomp *zcomp_create(const char *comp); 31*4882a593Smuzhiyun void zcomp_destroy(struct zcomp *comp); 32*4882a593Smuzhiyun 33*4882a593Smuzhiyun struct zcomp_strm *zcomp_stream_get(struct zcomp *comp); 34*4882a593Smuzhiyun void zcomp_stream_put(struct zcomp *comp); 35*4882a593Smuzhiyun 36*4882a593Smuzhiyun int zcomp_compress(struct zcomp_strm *zstrm, 37*4882a593Smuzhiyun const void *src, unsigned int *dst_len); 38*4882a593Smuzhiyun 39*4882a593Smuzhiyun int zcomp_decompress(struct zcomp_strm *zstrm, 40*4882a593Smuzhiyun const void *src, unsigned int src_len, void *dst); 41*4882a593Smuzhiyun 42*4882a593Smuzhiyun bool zcomp_set_max_streams(struct zcomp *comp, int num_strm); 43*4882a593Smuzhiyun #endif /* _ZCOMP_H_ */ 44