Edit File: pq.h
/* -*- linux-c -*- ------------------------------------------------------- * * * Copyright 2003 H. Peter Anvin - All Rights Reserved * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, Inc., 53 Temple Place Ste 330, * Boston MA 02111-1307, USA; either version 2 of the License, or * (at your option) any later version; incorporated herein by reference. * * ----------------------------------------------------------------------- */ #ifndef LINUX_RAID_RAID6_H #define LINUX_RAID_RAID6_H #ifdef __KERNEL__ /* Set to 1 to use kernel-wide empty_zero_page */ #define RAID6_USE_EMPTY_ZERO_PAGE 0 #include <linux/blkdev.h> /* We need a pre-zeroed page... if we don't want to use the kernel-provided one define it here */ #if RAID6_USE_EMPTY_ZERO_PAGE # define raid6_empty_zero_page empty_zero_page #else extern const char raid6_empty_zero_page[PAGE_SIZE]; #endif #else /* ! __KERNEL__ */ /* Used for testing in user space */ #include <errno.h> #include <inttypes.h> #include <limits.h> #include <stddef.h> #include <sys/mman.h> #include <sys/types.h> /* Not standard, but glibc defines it */ #define BITS_PER_LONG __WORDSIZE typedef uint8_t u8; typedef uint16_t u16; typedef uint32_t u32; typedef uint64_t u64; #ifndef PAGE_SIZE # define PAGE_SIZE 4096 #endif extern const char raid6_empty_zero_page[PAGE_SIZE]; #define __init #define __exit #define __attribute_const__ __attribute__((const)) #define noinline __attribute__((noinline)) #define preempt_enable() #define preempt_disable() #define cpu_has_feature(x) 1 #define enable_kernel_altivec() #define disable_kernel_altivec() #define EXPORT_SYMBOL(sym) #define EXPORT_SYMBOL_GPL(sym) #define MODULE_LICENSE(licence) #define MODULE_DESCRIPTION(desc) #define subsys_initcall(x) #define module_exit(x) #endif /* __KERNEL__ */ /* Routine choices */ struct raid6_calls { void (*gen_syndrome)(int, size_t, void **); void (*xor_syndrome)(int, int, int, size_t, void **); int (*valid)(void); /* Returns 1 if this routine set is usable */ const char *name; /* Name of this routine set */ int prefer; /* Has special performance attribute */ }; /* Selected algorithm */ extern struct raid6_calls raid6_call; /* Various routine sets */ extern const struct raid6_calls raid6_intx1; extern const struct raid6_calls raid6_intx2; extern const struct raid6_calls raid6_intx4; extern const struct raid6_calls raid6_intx8; extern const struct raid6_calls raid6_intx16; extern const struct raid6_calls raid6_intx32; extern const struct raid6_calls raid6_mmxx1; extern const struct raid6_calls raid6_mmxx2; extern const struct raid6_calls raid6_sse1x1; extern const struct raid6_calls raid6_sse1x2; extern const struct raid6_calls raid6_sse2x1; extern const struct raid6_calls raid6_sse2x2; extern const struct raid6_calls raid6_sse2x4; extern const struct raid6_calls raid6_altivec1; extern const struct raid6_calls raid6_altivec2; extern const struct raid6_calls raid6_altivec4; extern const struct raid6_calls raid6_altivec8; extern const struct raid6_calls raid6_avx2x1; extern const struct raid6_calls raid6_avx2x2; extern const struct raid6_calls raid6_avx2x4; extern const struct raid6_calls raid6_avx512x1; extern const struct raid6_calls raid6_avx512x2; extern const struct raid6_calls raid6_avx512x4; struct raid6_recov_calls { void (*data2)(int, size_t, int, int, void **); void (*datap)(int, size_t, int, void **); int (*valid)(void); const char *name; int priority; }; extern const struct raid6_recov_calls raid6_recov_intx1; extern const struct raid6_recov_calls raid6_recov_ssse3; extern const struct raid6_recov_calls raid6_recov_avx2; extern const struct raid6_recov_calls raid6_recov_avx512; extern const struct raid6_calls raid6_neonx1; extern const struct raid6_calls raid6_neonx2; extern const struct raid6_calls raid6_neonx4; extern const struct raid6_calls raid6_neonx8; /* Algorithm list */ extern const struct raid6_calls * const raid6_algos[]; extern const struct raid6_recov_calls *const raid6_recov_algos[]; int raid6_select_algo(void); /* Return values from chk_syndrome */ #define RAID6_OK 0 #define RAID6_P_BAD 1 #define RAID6_Q_BAD 2 #define RAID6_PQ_BAD 3 /* Galois field tables */ extern const u8 raid6_gfmul[256][256] __attribute__((aligned(256))); extern const u8 raid6_vgfmul[256][32] __attribute__((aligned(256))); extern const u8 raid6_gfexp[256] __attribute__((aligned(256))); extern const u8 raid6_gfinv[256] __attribute__((aligned(256))); extern const u8 raid6_gfexi[256] __attribute__((aligned(256))); /* Recovery routines */ extern void (*raid6_2data_recov)(int disks, size_t bytes, int faila, int failb, void **ptrs); extern void (*raid6_datap_recov)(int disks, size_t bytes, int faila, void **ptrs); void raid6_dual_recov(int disks, size_t bytes, int faila, int failb, void **ptrs); /* Some definitions to allow code to be compiled for testing in userspace */ #ifndef __KERNEL__ # define jiffies raid6_jiffies() # define printk printf # define GFP_KERNEL 0 # define __get_free_pages(x, y) ((unsigned long)mmap(NULL, PAGE_SIZE << (y), \ PROT_READ|PROT_WRITE, \ MAP_PRIVATE|MAP_ANONYMOUS,\ 0, 0)) # define free_pages(x, y) munmap((void *)(x), PAGE_SIZE << (y)) static inline void cpu_relax(void) { /* Nothing */ } #undef HZ #define HZ 1000 static inline uint32_t raid6_jiffies(void) { struct timeval tv; gettimeofday(&tv, NULL); return tv.tv_sec*1000 + tv.tv_usec/1000; } #endif /* ! __KERNEL__ */ #endif /* LINUX_RAID_RAID6_H */