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/**********************************************************************
Copyright(c) 2011-2015 Intel Corporation All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the
distribution.
* Neither the name of Intel Corporation nor the names of its
contributors may be used to endorse or promote products derived
from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
**********************************************************************/
#ifndef _RAID_H_
#define _RAID_H_
/**
* @file raid.h
* @brief Interface to RAID functions - XOR and P+Q calculation.
*
* This file defines the interface to optimized XOR calculation (RAID5) or P+Q
* dual parity (RAID6). Operations are carried out on an array of pointers to
* sources and output arrays.
*/
#ifdef __cplusplus
extern "C" {
#endif
/* Multi-binary functions */
/**
* @brief Generate XOR parity vector from N sources, runs appropriate version.
*
* This function determines what instruction sets are enabled and
* selects the appropriate version at runtime.
*
* @param vects Number of source+dest vectors in array.
* @param len Length of each vector in bytes.
* @param array Array of pointers to source and dest. For XOR the dest is
* the last pointer. ie array[vects-1]. Src and dest
* pointers must be aligned to 32B.
*
* @returns 0 pass, other fail
*/
int xor_gen(int vects, int len, void **array);
/**
* @brief Checks that array has XOR parity sum of 0 across all vectors, runs appropriate version.
*
* This function determines what instruction sets are enabled and
* selects the appropriate version at runtime.
*
* @param vects Number of vectors in array.
* @param len Length of each vector in bytes.
* @param array Array of pointers to vectors. Src and dest pointers
* must be aligned to 16B.
*
* @returns 0 pass, other fail
*/
int xor_check(int vects, int len, void **array);
/**
* @brief Generate P+Q parity vectors from N sources, runs appropriate version.
*
* This function determines what instruction sets are enabled and
* selects the appropriate version at runtime.
*
* @param vects Number of source+dest vectors in array.
* @param len Length of each vector in bytes. Must be 32B aligned.
* @param array Array of pointers to source and dest. For P+Q the dest
* is the last two pointers. ie array[vects-2],
* array[vects-1]. P and Q parity vectors are
* written to these last two pointers. Src and dest
* pointers must be aligned to 32B.
*
* @returns 0 pass, other fail
*/
int pq_gen(int vects, int len, void **array);
/**
* @brief Checks that array of N sources, P and Q are consistent across all vectors, runs appropriate version.
*
* This function determines what instruction sets are enabled and
* selects the appropriate version at runtime.
*
* @param vects Number of vectors in array including P&Q.
* @param len Length of each vector in bytes. Must be 16B aligned.
* @param array Array of pointers to source and P, Q. P and Q parity
* are assumed to be the last two pointers in the array.
* All pointers must be aligned to 16B.
*
* @returns 0 pass, other fail
*/
int pq_check(int vects, int len, void **array);
/* Arch specific versions */
// x86 only
#if defined(__i386__) || defined(__x86_64__)
/**
* @brief Generate XOR parity vector from N sources.
* @requires SSE4.1
*
* @param vects Number of source+dest vectors in array.
* @param len Length of each vector in bytes.
* @param array Array of pointers to source and dest. For XOR the dest is
* the last pointer. ie array[vects-1]. Src and dest pointers
* must be aligned to 16B.
*
* @returns 0 pass, other fail
*/
int xor_gen_sse(int vects, int len, void **array);
/**
* @brief Generate XOR parity vector from N sources.
* @requires AVX
*
* @param vects Number of source+dest vectors in array.
* @param len Length of each vector in bytes.
* @param array Array of pointers to source and dest. For XOR the dest is
* the last pointer. ie array[vects-1]. Src and dest pointers
* must be aligned to 32B.
*
* @returns 0 pass, other fail
*/
int xor_gen_avx(int vects, int len, void **array);
/**
* @brief Checks that array has XOR parity sum of 0 across all vectors.
* @requires SSE4.1
*
* @param vects Number of vectors in array.
* @param len Length of each vector in bytes.
* @param array Array of pointers to vectors. Src and dest pointers
* must be aligned to 16B.
*
* @returns 0 pass, other fail
*/
int xor_check_sse(int vects, int len, void **array);
/**
* @brief Generate P+Q parity vectors from N sources.
* @requires SSE4.1
*
* @param vects Number of source+dest vectors in array.
* @param len Length of each vector in bytes. Must be 16B aligned.
* @param array Array of pointers to source and dest. For P+Q the dest
* is the last two pointers. ie array[vects-2],
* array[vects-1]. P and Q parity vectors are
* written to these last two pointers. Src and dest
* pointers must be aligned to 16B.
*
* @returns 0 pass, other fail
*/
int pq_gen_sse(int vects, int len, void **array);
/**
* @brief Generate P+Q parity vectors from N sources.
* @requires AVX
*
* @param vects Number of source+dest vectors in array.
* @param len Length of each vector in bytes. Must be 16B aligned.
* @param array Array of pointers to source and dest. For P+Q the dest
* is the last two pointers. ie array[vects-2],
* array[vects-1]. P and Q parity vectors are
* written to these last two pointers. Src and dest
* pointers must be aligned to 16B.
*
* @returns 0 pass, other fail
*/
int pq_gen_avx(int vects, int len, void **array);
/**
* @brief Generate P+Q parity vectors from N sources.
* @requires AVX2
*
* @param vects Number of source+dest vectors in array.
* @param len Length of each vector in bytes. Must be 32B aligned.
* @param array Array of pointers to source and dest. For P+Q the dest
* is the last two pointers. ie array[vects-2],
* array[vects-1]. P and Q parity vectors are
* written to these last two pointers. Src and dest
* pointers must be aligned to 32B.
*
* @returns 0 pass, other fail
*/
int pq_gen_avx2(int vects, int len, void **array);
/**
* @brief Checks that array of N sources, P and Q are consistent across all vectors.
* @requires SSE4.1
*
* @param vects Number of vectors in array including P&Q.
* @param len Length of each vector in bytes. Must be 16B aligned.
* @param array Array of pointers to source and P, Q. P and Q parity
are assumed to be the last two pointers in the array.
All pointers must be aligned to 16B.
* @returns 0 pass, other fail
*/
int pq_check_sse(int vects, int len, void **array);
#endif
/**
* @brief Generate P+Q parity vectors from N sources, runs baseline version.
* @param vects Number of source+dest vectors in array.
* @param len Length of each vector in bytes. Must be 16B aligned.
* @param array Array of pointers to source and dest. For P+Q the dest
* is the last two pointers. ie array[vects-2],
* array[vects-1]. P and Q parity vectors are
* written to these last two pointers. Src and dest pointers
* must be aligned to 16B.
*
* @returns 0 pass, other fail
*/
int pq_gen_base(int vects, int len, void **array);
/**
* @brief Generate XOR parity vector from N sources, runs baseline version.
* @param vects Number of source+dest vectors in array.
* @param len Length of each vector in bytes.
* @param array Array of pointers to source and dest. For XOR the dest is
* the last pointer. ie array[vects-1]. Src and dest pointers
* must be aligned to 32B.
*
* @returns 0 pass, other fail
*/
int xor_gen_base(int vects, int len, void **array);
/**
* @brief Checks that array has XOR parity sum of 0 across all vectors, runs baseline version.
*
* @param vects Number of vectors in array.
* @param len Length of each vector in bytes.
* @param array Array of pointers to vectors. Src and dest pointers
* must be aligned to 16B.
*
* @returns 0 pass, other fail
*/
int xor_check_base(int vects, int len, void **array);
/**
* @brief Checks that array of N sources, P and Q are consistent across all vectors, runs baseline version.
*
* @param vects Number of vectors in array including P&Q.
* @param len Length of each vector in bytes. Must be 16B aligned.
* @param array Array of pointers to source and P, Q. P and Q parity
* are assumed to be the last two pointers in the array.
* All pointers must be aligned to 16B.
*
* @returns 0 pass, other fail
*/
int pq_check_base(int vects, int len, void **array);
#ifdef __cplusplus
}
#endif
#endif //_RAID_H_
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