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8#ifndef LINUX_RAID_RAID6_H
9#define LINUX_RAID_RAID6_H
10
11#ifdef __KERNEL__
12
13
14#define RAID6_USE_EMPTY_ZERO_PAGE 0
15#include <linux/blkdev.h>
16
17
18
19#if RAID6_USE_EMPTY_ZERO_PAGE
20# define raid6_empty_zero_page empty_zero_page
21#else
22extern const char raid6_empty_zero_page[PAGE_SIZE];
23#endif
24
25#else
26
27
28#include <errno.h>
29#include <inttypes.h>
30#include <stddef.h>
31#include <string.h>
32#include <sys/mman.h>
33#include <sys/time.h>
34#include <sys/types.h>
35
36
37#define BITS_PER_LONG __WORDSIZE
38
39typedef uint8_t u8;
40typedef uint16_t u16;
41typedef uint32_t u32;
42typedef uint64_t u64;
43
44#ifndef PAGE_SIZE
45# define PAGE_SIZE 4096
46#endif
47#ifndef PAGE_SHIFT
48# define PAGE_SHIFT 12
49#endif
50extern const char raid6_empty_zero_page[PAGE_SIZE];
51
52#define __init
53#define __exit
54#ifndef __attribute_const__
55# define __attribute_const__ __attribute__((const))
56#endif
57#define noinline __attribute__((noinline))
58
59#define preempt_enable()
60#define preempt_disable()
61#define cpu_has_feature(x) 1
62#define enable_kernel_altivec()
63#define disable_kernel_altivec()
64
65#undef EXPORT_SYMBOL
66#define EXPORT_SYMBOL(sym)
67#undef EXPORT_SYMBOL_GPL
68#define EXPORT_SYMBOL_GPL(sym)
69#define MODULE_LICENSE(licence)
70#define MODULE_DESCRIPTION(desc)
71#define subsys_initcall(x)
72#define module_exit(x)
73
74#define IS_ENABLED(x) (x)
75#define CONFIG_RAID6_PQ_BENCHMARK 1
76#endif
77
78
79struct raid6_calls {
80 void (*gen_syndrome)(int, size_t, void **);
81 void (*xor_syndrome)(int, int, int, size_t, void **);
82 int (*valid)(void);
83 const char *name;
84 int prefer;
85};
86
87
88extern struct raid6_calls raid6_call;
89
90
91extern const struct raid6_calls raid6_intx1;
92extern const struct raid6_calls raid6_intx2;
93extern const struct raid6_calls raid6_intx4;
94extern const struct raid6_calls raid6_intx8;
95extern const struct raid6_calls raid6_intx16;
96extern const struct raid6_calls raid6_intx32;
97extern const struct raid6_calls raid6_mmxx1;
98extern const struct raid6_calls raid6_mmxx2;
99extern const struct raid6_calls raid6_sse1x1;
100extern const struct raid6_calls raid6_sse1x2;
101extern const struct raid6_calls raid6_sse2x1;
102extern const struct raid6_calls raid6_sse2x2;
103extern const struct raid6_calls raid6_sse2x4;
104extern const struct raid6_calls raid6_altivec1;
105extern const struct raid6_calls raid6_altivec2;
106extern const struct raid6_calls raid6_altivec4;
107extern const struct raid6_calls raid6_altivec8;
108extern const struct raid6_calls raid6_avx2x1;
109extern const struct raid6_calls raid6_avx2x2;
110extern const struct raid6_calls raid6_avx2x4;
111extern const struct raid6_calls raid6_avx512x1;
112extern const struct raid6_calls raid6_avx512x2;
113extern const struct raid6_calls raid6_avx512x4;
114extern const struct raid6_calls raid6_s390vx8;
115extern const struct raid6_calls raid6_vpermxor1;
116extern const struct raid6_calls raid6_vpermxor2;
117extern const struct raid6_calls raid6_vpermxor4;
118extern const struct raid6_calls raid6_vpermxor8;
119
120struct raid6_recov_calls {
121 void (*data2)(int, size_t, int, int, void **);
122 void (*datap)(int, size_t, int, void **);
123 int (*valid)(void);
124 const char *name;
125 int priority;
126};
127
128extern const struct raid6_recov_calls raid6_recov_intx1;
129extern const struct raid6_recov_calls raid6_recov_ssse3;
130extern const struct raid6_recov_calls raid6_recov_avx2;
131extern const struct raid6_recov_calls raid6_recov_avx512;
132extern const struct raid6_recov_calls raid6_recov_s390xc;
133extern const struct raid6_recov_calls raid6_recov_neon;
134
135extern const struct raid6_calls raid6_neonx1;
136extern const struct raid6_calls raid6_neonx2;
137extern const struct raid6_calls raid6_neonx4;
138extern const struct raid6_calls raid6_neonx8;
139
140
141extern const struct raid6_calls * const raid6_algos[];
142extern const struct raid6_recov_calls *const raid6_recov_algos[];
143int raid6_select_algo(void);
144
145
146#define RAID6_OK 0
147#define RAID6_P_BAD 1
148#define RAID6_Q_BAD 2
149#define RAID6_PQ_BAD 3
150
151
152extern const u8 raid6_gfmul[256][256] __attribute__((aligned(256)));
153extern const u8 raid6_vgfmul[256][32] __attribute__((aligned(256)));
154extern const u8 raid6_gfexp[256] __attribute__((aligned(256)));
155extern const u8 raid6_gflog[256] __attribute__((aligned(256)));
156extern const u8 raid6_gfinv[256] __attribute__((aligned(256)));
157extern const u8 raid6_gfexi[256] __attribute__((aligned(256)));
158
159
160extern void (*raid6_2data_recov)(int disks, size_t bytes, int faila, int failb,
161 void **ptrs);
162extern void (*raid6_datap_recov)(int disks, size_t bytes, int faila,
163 void **ptrs);
164void raid6_dual_recov(int disks, size_t bytes, int faila, int failb,
165 void **ptrs);
166
167
168#ifndef __KERNEL__
169
170# define jiffies raid6_jiffies()
171# define printk printf
172# define pr_err(format, ...) fprintf(stderr, format, ## __VA_ARGS__)
173# define pr_info(format, ...) fprintf(stdout, format, ## __VA_ARGS__)
174# define GFP_KERNEL 0
175# define __get_free_pages(x, y) ((unsigned long)mmap(NULL, PAGE_SIZE << (y), \
176 PROT_READ|PROT_WRITE, \
177 MAP_PRIVATE|MAP_ANONYMOUS,\
178 0, 0))
179# define free_pages(x, y) munmap((void *)(x), PAGE_SIZE << (y))
180
181static inline void cpu_relax(void)
182{
183
184}
185
186#undef HZ
187#define HZ 1000
188static inline uint32_t raid6_jiffies(void)
189{
190 struct timeval tv;
191 gettimeofday(&tv, NULL);
192 return tv.tv_sec*1000 + tv.tv_usec/1000;
193}
194
195#endif
196
197#endif
198