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 | |