mirror of
https://git.proxmox.com/git/mirror_zfs.git
synced 2024-12-25 18:59:33 +03:00
155 lines
4.6 KiB
C
155 lines
4.6 KiB
C
/*
|
|
* CDDL HEADER START
|
|
*
|
|
* The contents of this file are subject to the terms of the
|
|
* Common Development and Distribution License (the "License").
|
|
* You may not use this file except in compliance with the License.
|
|
*
|
|
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
|
|
* or http://www.opensolaris.org/os/licensing.
|
|
* See the License for the specific language governing permissions
|
|
* and limitations under the License.
|
|
*
|
|
* When distributing Covered Code, include this CDDL HEADER in each
|
|
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
|
|
* If applicable, add the following below this CDDL HEADER, with the
|
|
* fields enclosed by brackets "[]" replaced with your own identifying
|
|
* information: Portions Copyright [yyyy] [name of copyright owner]
|
|
*
|
|
* CDDL HEADER END
|
|
*/
|
|
/*
|
|
* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
|
|
* Use is subject to license terms.
|
|
*/
|
|
/*
|
|
* Copyright 2013 Saso Kiselkov. All rights reserved.
|
|
*/
|
|
|
|
#ifndef _ZFS_FLETCHER_H
|
|
#define _ZFS_FLETCHER_H
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/spa_checksum.h>
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/*
|
|
* fletcher checksum functions
|
|
*
|
|
* Note: Fletcher checksum methods expect buffer size to be 4B aligned. This
|
|
* limitation stems from the algorithm design. Performing incremental checksum
|
|
* without said alignment would yield different results. Therefore, the code
|
|
* includes assertions for the size alignment.
|
|
* For compatibility, it is required that some code paths calculate checksum of
|
|
* non-aligned buffer sizes. For this purpose, `fletcher_4_native_varsize()`
|
|
* checksum method is added. This method will ignore last (size % 4) bytes of
|
|
* the data buffer.
|
|
*/
|
|
void fletcher_init(zio_cksum_t *);
|
|
void fletcher_2_native(const void *, uint64_t, const void *, zio_cksum_t *);
|
|
void fletcher_2_byteswap(const void *, uint64_t, const void *, zio_cksum_t *);
|
|
void fletcher_4_native(const void *, uint64_t, const void *, zio_cksum_t *);
|
|
int fletcher_2_incremental_native(void *, size_t, void *);
|
|
int fletcher_2_incremental_byteswap(void *, size_t, void *);
|
|
void fletcher_4_native_varsize(const void *, uint64_t, zio_cksum_t *);
|
|
void fletcher_4_byteswap(const void *, uint64_t, const void *, zio_cksum_t *);
|
|
int fletcher_4_incremental_native(void *, size_t, void *);
|
|
int fletcher_4_incremental_byteswap(void *, size_t, void *);
|
|
int fletcher_4_impl_set(const char *selector);
|
|
void fletcher_4_init(void);
|
|
void fletcher_4_fini(void);
|
|
|
|
|
|
|
|
/* Internal fletcher ctx */
|
|
|
|
typedef struct zfs_fletcher_superscalar {
|
|
uint64_t v[4];
|
|
} zfs_fletcher_superscalar_t;
|
|
|
|
typedef struct zfs_fletcher_sse {
|
|
uint64_t v[2] __attribute__((aligned(16)));
|
|
} zfs_fletcher_sse_t;
|
|
|
|
typedef struct zfs_fletcher_avx {
|
|
uint64_t v[4] __attribute__((aligned(32)));
|
|
} zfs_fletcher_avx_t;
|
|
|
|
typedef struct zfs_fletcher_avx512 {
|
|
uint64_t v[8] __attribute__((aligned(64)));
|
|
} zfs_fletcher_avx512_t;
|
|
|
|
typedef struct zfs_fletcher_aarch64_neon {
|
|
uint64_t v[2] __attribute__((aligned(16)));
|
|
} zfs_fletcher_aarch64_neon_t;
|
|
|
|
|
|
typedef union fletcher_4_ctx {
|
|
zio_cksum_t scalar;
|
|
zfs_fletcher_superscalar_t superscalar[4];
|
|
|
|
#if defined(HAVE_SSE2) || (defined(HAVE_SSE2) && defined(HAVE_SSSE3))
|
|
zfs_fletcher_sse_t sse[4];
|
|
#endif
|
|
#if defined(HAVE_AVX) && defined(HAVE_AVX2)
|
|
zfs_fletcher_avx_t avx[4];
|
|
#endif
|
|
#if defined(__x86_64) && defined(HAVE_AVX512F)
|
|
zfs_fletcher_avx512_t avx512[4];
|
|
#endif
|
|
#if defined(__aarch64__)
|
|
zfs_fletcher_aarch64_neon_t aarch64_neon[4];
|
|
#endif
|
|
} fletcher_4_ctx_t;
|
|
|
|
/*
|
|
* fletcher checksum struct
|
|
*/
|
|
typedef void (*fletcher_4_init_f)(fletcher_4_ctx_t *);
|
|
typedef void (*fletcher_4_fini_f)(fletcher_4_ctx_t *, zio_cksum_t *);
|
|
typedef void (*fletcher_4_compute_f)(fletcher_4_ctx_t *,
|
|
const void *, uint64_t);
|
|
|
|
typedef struct fletcher_4_func {
|
|
fletcher_4_init_f init_native;
|
|
fletcher_4_fini_f fini_native;
|
|
fletcher_4_compute_f compute_native;
|
|
fletcher_4_init_f init_byteswap;
|
|
fletcher_4_fini_f fini_byteswap;
|
|
fletcher_4_compute_f compute_byteswap;
|
|
boolean_t (*valid)(void);
|
|
const char *name;
|
|
} fletcher_4_ops_t;
|
|
|
|
extern const fletcher_4_ops_t fletcher_4_superscalar_ops;
|
|
extern const fletcher_4_ops_t fletcher_4_superscalar4_ops;
|
|
|
|
#if defined(HAVE_SSE2)
|
|
extern const fletcher_4_ops_t fletcher_4_sse2_ops;
|
|
#endif
|
|
|
|
#if defined(HAVE_SSE2) && defined(HAVE_SSSE3)
|
|
extern const fletcher_4_ops_t fletcher_4_ssse3_ops;
|
|
#endif
|
|
|
|
#if defined(HAVE_AVX) && defined(HAVE_AVX2)
|
|
extern const fletcher_4_ops_t fletcher_4_avx2_ops;
|
|
#endif
|
|
|
|
#if defined(__x86_64) && defined(HAVE_AVX512F)
|
|
extern const fletcher_4_ops_t fletcher_4_avx512f_ops;
|
|
#endif
|
|
|
|
#if defined(__aarch64__)
|
|
extern const fletcher_4_ops_t fletcher_4_aarch64_neon_ops;
|
|
#endif
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* _ZFS_FLETCHER_H */
|