18c2ecf20Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0-or-later */ 28c2ecf20Sopenharmony_ci/* 38c2ecf20Sopenharmony_ci * Copyright (C) 2014 Sergey Senozhatsky. 48c2ecf20Sopenharmony_ci */ 58c2ecf20Sopenharmony_ci 68c2ecf20Sopenharmony_ci#ifndef _ZCOMP_H_ 78c2ecf20Sopenharmony_ci#define _ZCOMP_H_ 88c2ecf20Sopenharmony_ci#include <linux/local_lock.h> 98c2ecf20Sopenharmony_ci 108c2ecf20Sopenharmony_cistruct zcomp_strm { 118c2ecf20Sopenharmony_ci /* The members ->buffer and ->tfm are protected by ->lock. */ 128c2ecf20Sopenharmony_ci local_lock_t lock; 138c2ecf20Sopenharmony_ci /* compression/decompression buffer */ 148c2ecf20Sopenharmony_ci void *buffer; 158c2ecf20Sopenharmony_ci struct crypto_comp *tfm; 168c2ecf20Sopenharmony_ci}; 178c2ecf20Sopenharmony_ci 188c2ecf20Sopenharmony_ci/* dynamic per-device compression frontend */ 198c2ecf20Sopenharmony_cistruct zcomp { 208c2ecf20Sopenharmony_ci struct zcomp_strm __percpu *stream; 218c2ecf20Sopenharmony_ci const char *name; 228c2ecf20Sopenharmony_ci struct hlist_node node; 238c2ecf20Sopenharmony_ci}; 248c2ecf20Sopenharmony_ci 258c2ecf20Sopenharmony_ciint zcomp_cpu_up_prepare(unsigned int cpu, struct hlist_node *node); 268c2ecf20Sopenharmony_ciint zcomp_cpu_dead(unsigned int cpu, struct hlist_node *node); 278c2ecf20Sopenharmony_cissize_t zcomp_available_show(const char *comp, char *buf); 288c2ecf20Sopenharmony_cibool zcomp_available_algorithm(const char *comp); 298c2ecf20Sopenharmony_ci 308c2ecf20Sopenharmony_cistruct zcomp *zcomp_create(const char *comp); 318c2ecf20Sopenharmony_civoid zcomp_destroy(struct zcomp *comp); 328c2ecf20Sopenharmony_ci 338c2ecf20Sopenharmony_cistruct zcomp_strm *zcomp_stream_get(struct zcomp *comp); 348c2ecf20Sopenharmony_civoid zcomp_stream_put(struct zcomp *comp); 358c2ecf20Sopenharmony_ci 368c2ecf20Sopenharmony_ciint zcomp_compress(struct zcomp_strm *zstrm, 378c2ecf20Sopenharmony_ci const void *src, unsigned int *dst_len); 388c2ecf20Sopenharmony_ci 398c2ecf20Sopenharmony_ciint zcomp_decompress(struct zcomp_strm *zstrm, 408c2ecf20Sopenharmony_ci const void *src, unsigned int src_len, void *dst); 418c2ecf20Sopenharmony_ci 428c2ecf20Sopenharmony_cibool zcomp_set_max_streams(struct zcomp *comp, int num_strm); 438c2ecf20Sopenharmony_ci#endif /* _ZCOMP_H_ */ 44