1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* -*- linux-c -*- ------------------------------------------------------- * 3 * 4 * Copyright 2003 H. Peter Anvin - All Rights Reserved 5 * 6 * ----------------------------------------------------------------------- */ 7 8 #ifndef LINUX_RAID_RAID6_H 9 #define LINUX_RAID_RAID6_H 10 11 #ifdef __KERNEL__ 12 13 #include <linux/blkdev.h> 14 15 extern const char raid6_empty_zero_page[PAGE_SIZE]; 16 17 #else /* ! __KERNEL__ */ 18 /* Used for testing in user space */ 19 20 #include <errno.h> 21 #include <inttypes.h> 22 #include <stddef.h> 23 #include <string.h> 24 #include <sys/mman.h> 25 #include <sys/time.h> 26 #include <sys/types.h> 27 28 /* Not standard, but glibc defines it */ 29 #define BITS_PER_LONG __WORDSIZE 30 31 typedef uint8_t u8; 32 typedef uint16_t u16; 33 typedef uint32_t u32; 34 typedef uint64_t u64; 35 36 #ifndef PAGE_SIZE 37 # define PAGE_SIZE 4096 38 #endif 39 #ifndef PAGE_SHIFT 40 # define PAGE_SHIFT 12 41 #endif 42 extern const char raid6_empty_zero_page[PAGE_SIZE]; 43 44 #define __init 45 #define __exit 46 #ifndef __attribute_const__ 47 # define __attribute_const__ __attribute__((const)) 48 #endif 49 #define noinline __attribute__((noinline)) 50 51 #define preempt_enable() 52 #define preempt_disable() 53 #define cpu_has_feature(x) 1 54 #define enable_kernel_altivec() 55 #define disable_kernel_altivec() 56 57 #undef EXPORT_SYMBOL 58 #define EXPORT_SYMBOL(sym) 59 #undef EXPORT_SYMBOL_GPL 60 #define EXPORT_SYMBOL_GPL(sym) 61 #define MODULE_LICENSE(licence) 62 #define MODULE_DESCRIPTION(desc) 63 #define subsys_initcall(x) 64 #define module_exit(x) 65 66 #define IS_ENABLED(x) (x) 67 #define CONFIG_RAID6_PQ_BENCHMARK 1 68 #endif /* __KERNEL__ */ 69 70 /* Routine choices */ 71 struct raid6_calls { 72 void (*gen_syndrome)(int, size_t, void **); 73 void (*xor_syndrome)(int, int, int, size_t, void **); 74 int (*valid)(void); /* Returns 1 if this routine set is usable */ 75 const char *name; /* Name of this routine set */ 76 int priority; /* Relative priority ranking if non-zero */ 77 }; 78 79 /* Selected algorithm */ 80 extern struct raid6_calls raid6_call; 81 82 /* Various routine sets */ 83 extern const struct raid6_calls raid6_intx1; 84 extern const struct raid6_calls raid6_intx2; 85 extern const struct raid6_calls raid6_intx4; 86 extern const struct raid6_calls raid6_intx8; 87 extern const struct raid6_calls raid6_mmxx1; 88 extern const struct raid6_calls raid6_mmxx2; 89 extern const struct raid6_calls raid6_sse1x1; 90 extern const struct raid6_calls raid6_sse1x2; 91 extern const struct raid6_calls raid6_sse2x1; 92 extern const struct raid6_calls raid6_sse2x2; 93 extern const struct raid6_calls raid6_sse2x4; 94 extern const struct raid6_calls raid6_altivec1; 95 extern const struct raid6_calls raid6_altivec2; 96 extern const struct raid6_calls raid6_altivec4; 97 extern const struct raid6_calls raid6_altivec8; 98 extern const struct raid6_calls raid6_avx2x1; 99 extern const struct raid6_calls raid6_avx2x2; 100 extern const struct raid6_calls raid6_avx2x4; 101 extern const struct raid6_calls raid6_avx512x1; 102 extern const struct raid6_calls raid6_avx512x2; 103 extern const struct raid6_calls raid6_avx512x4; 104 extern const struct raid6_calls raid6_s390vx8; 105 extern const struct raid6_calls raid6_vpermxor1; 106 extern const struct raid6_calls raid6_vpermxor2; 107 extern const struct raid6_calls raid6_vpermxor4; 108 extern const struct raid6_calls raid6_vpermxor8; 109 extern const struct raid6_calls raid6_lsx; 110 extern const struct raid6_calls raid6_lasx; 111 112 struct raid6_recov_calls { 113 void (*data2)(int, size_t, int, int, void **); 114 void (*datap)(int, size_t, int, void **); 115 int (*valid)(void); 116 const char *name; 117 int priority; 118 }; 119 120 extern const struct raid6_recov_calls raid6_recov_intx1; 121 extern const struct raid6_recov_calls raid6_recov_ssse3; 122 extern const struct raid6_recov_calls raid6_recov_avx2; 123 extern const struct raid6_recov_calls raid6_recov_avx512; 124 extern const struct raid6_recov_calls raid6_recov_s390xc; 125 extern const struct raid6_recov_calls raid6_recov_neon; 126 extern const struct raid6_recov_calls raid6_recov_lsx; 127 extern const struct raid6_recov_calls raid6_recov_lasx; 128 129 extern const struct raid6_calls raid6_neonx1; 130 extern const struct raid6_calls raid6_neonx2; 131 extern const struct raid6_calls raid6_neonx4; 132 extern const struct raid6_calls raid6_neonx8; 133 134 /* Algorithm list */ 135 extern const struct raid6_calls * const raid6_algos[]; 136 extern const struct raid6_recov_calls *const raid6_recov_algos[]; 137 int raid6_select_algo(void); 138 139 /* Return values from chk_syndrome */ 140 #define RAID6_OK 0 141 #define RAID6_P_BAD 1 142 #define RAID6_Q_BAD 2 143 #define RAID6_PQ_BAD 3 144 145 /* Galois field tables */ 146 extern const u8 raid6_gfmul[256][256] __attribute__((aligned(256))); 147 extern const u8 raid6_vgfmul[256][32] __attribute__((aligned(256))); 148 extern const u8 raid6_gfexp[256] __attribute__((aligned(256))); 149 extern const u8 raid6_gflog[256] __attribute__((aligned(256))); 150 extern const u8 raid6_gfinv[256] __attribute__((aligned(256))); 151 extern const u8 raid6_gfexi[256] __attribute__((aligned(256))); 152 153 /* Recovery routines */ 154 extern void (*raid6_2data_recov)(int disks, size_t bytes, int faila, int failb, 155 void **ptrs); 156 extern void (*raid6_datap_recov)(int disks, size_t bytes, int faila, 157 void **ptrs); 158 void raid6_dual_recov(int disks, size_t bytes, int faila, int failb, 159 void **ptrs); 160 161 /* Some definitions to allow code to be compiled for testing in userspace */ 162 #ifndef __KERNEL__ 163 164 # define jiffies raid6_jiffies() 165 # define printk printf 166 # define pr_err(format, ...) fprintf(stderr, format, ## __VA_ARGS__) 167 # define pr_info(format, ...) fprintf(stdout, format, ## __VA_ARGS__) 168 # define GFP_KERNEL 0 169 # define __get_free_pages(x, y) ((unsigned long)mmap(NULL, PAGE_SIZE << (y), \ 170 PROT_READ|PROT_WRITE, \ 171 MAP_PRIVATE|MAP_ANONYMOUS,\ 172 0, 0)) 173 # define free_pages(x, y) munmap((void *)(x), PAGE_SIZE << (y)) 174 175 static inline void cpu_relax(void) 176 { 177 /* Nothing */ 178 } 179 180 #undef HZ 181 #define HZ 1000 182 static inline uint32_t raid6_jiffies(void) 183 { 184 struct timeval tv; 185 gettimeofday(&tv, NULL); 186 return tv.tv_sec*1000 + tv.tv_usec/1000; 187 } 188 189 #endif /* ! __KERNEL__ */ 190 191 #endif /* LINUX_RAID_RAID6_H */ 192