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Merge tag 'i2c-for-6.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa...
[linux-2.6-block.git] / include / linux / raid / pq.h
CommitLineData
dd165a65 1/* SPDX-License-Identifier: GPL-2.0-or-later */
1da177e4
LT		 2/* -*- linux-c -*- ------------------------------------------------------- *
3 *
4 * Copyright 2003 H. Peter Anvin - All Rights Reserved
5 *
1da177e4
LT		 6 * ----------------------------------------------------------------------- */
7
8#ifndef LINUX_RAID_RAID6_H
9#define LINUX_RAID_RAID6_H
10
11#ifdef __KERNEL__
12
bff61975 13#include <linux/blkdev.h>
1da177e4 14
1da177e4 15extern const char raid6_empty_zero_page[PAGE_SIZE];
1da177e4
LT		 16
17#else /* ! __KERNEL__ */
18/* Used for testing in user space */
19
20#include <errno.h>
21#include <inttypes.h>
1da177e4 22#include <stddef.h>
f591df3c 23#include <string.h>
1da177e4 24#include <sys/mman.h>
e731f3e2 25#include <sys/time.h>
1da177e4
LT		 26#include <sys/types.h>
27
28/* Not standard, but glibc defines it */
29#define BITS_PER_LONG __WORDSIZE
30
31typedef uint8_t u8;
32typedef uint16_t u16;
33typedef uint32_t u32;
34typedef uint64_t u64;
35
36#ifndef PAGE_SIZE
37# define PAGE_SIZE 4096
38#endif
f591df3c
ZL		 39#ifndef PAGE_SHIFT
40# define PAGE_SHIFT 12
41#endif
1da177e4
LT		 42extern const char raid6_empty_zero_page[PAGE_SIZE];
43
44#define __init
45#define __exit
58af3110
DV		 46#ifndef __attribute_const__
47# define __attribute_const__ __attribute__((const))
48#endif
d7e70ba4 49#define noinline __attribute__((noinline))
1da177e4
LT		 50
51#define preempt_enable()
52#define preempt_disable()
d7e70ba4
PA		 53#define cpu_has_feature(x) 1
54#define enable_kernel_altivec()
55#define disable_kernel_altivec()
1da177e4 56
5e5ac01c 57#undef EXPORT_SYMBOL
f701d589 58#define EXPORT_SYMBOL(sym)
5e5ac01c 59#undef EXPORT_SYMBOL_GPL
d5302fe4 60#define EXPORT_SYMBOL_GPL(sym)
f701d589 61#define MODULE_LICENSE(licence)
d5302fe4 62#define MODULE_DESCRIPTION(desc)
f701d589
DW		 63#define subsys_initcall(x)
64#define module_exit(x)
be85f93a
DV		 65
66#define IS_ENABLED(x) (x)
67#define CONFIG_RAID6_PQ_BENCHMARK 1
1da177e4
LT		 68#endif /* __KERNEL__ */
69
70/* Routine choices */
71struct raid6_calls {
72 void (*gen_syndrome)(int, size_t, void **);
fe5cbc6e 73 void (*xor_syndrome)(int, int, int, size_t, void **);
1da177e4
LT		 74 int (*valid)(void); /* Returns 1 if this routine set is usable */
75 const char *name; /* Name of this routine set */
36dacddb 76 int priority; /* Relative priority ranking if non-zero */
1da177e4
LT		 77};
78
79/* Selected algorithm */
80extern struct raid6_calls raid6_call;
81
7820f9e1
N		 82/* Various routine sets */
83extern const struct raid6_calls raid6_intx1;
84extern const struct raid6_calls raid6_intx2;
85extern const struct raid6_calls raid6_intx4;
86extern const struct raid6_calls raid6_intx8;
7820f9e1
N		 87extern const struct raid6_calls raid6_mmxx1;
88extern const struct raid6_calls raid6_mmxx2;
89extern const struct raid6_calls raid6_sse1x1;
90extern const struct raid6_calls raid6_sse1x2;
91extern const struct raid6_calls raid6_sse2x1;
92extern const struct raid6_calls raid6_sse2x2;
93extern const struct raid6_calls raid6_sse2x4;
94extern const struct raid6_calls raid6_altivec1;
95extern const struct raid6_calls raid6_altivec2;
96extern const struct raid6_calls raid6_altivec4;
97extern const struct raid6_calls raid6_altivec8;
2c935842
YL		 98extern const struct raid6_calls raid6_avx2x1;
99extern const struct raid6_calls raid6_avx2x2;
100extern const struct raid6_calls raid6_avx2x4;
e0a491c1
GK		 101extern const struct raid6_calls raid6_avx512x1;
102extern const struct raid6_calls raid6_avx512x2;
103extern const struct raid6_calls raid6_avx512x4;
474fd6e8 104extern const struct raid6_calls raid6_s390vx8;
751ba79c
MB		 105extern const struct raid6_calls raid6_vpermxor1;
106extern const struct raid6_calls raid6_vpermxor2;
107extern const struct raid6_calls raid6_vpermxor4;
108extern const struct raid6_calls raid6_vpermxor8;
8f3f06df
WX		 109extern const struct raid6_calls raid6_lsx;
110extern const struct raid6_calls raid6_lasx;
7820f9e1 111
048a8b8c
JK		 112struct 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
120extern const struct raid6_recov_calls raid6_recov_intx1;
121extern const struct raid6_recov_calls raid6_recov_ssse3;
7056741f 122extern const struct raid6_recov_calls raid6_recov_avx2;
13c520b2 123extern const struct raid6_recov_calls raid6_recov_avx512;
f5b55fa1 124extern const struct raid6_recov_calls raid6_recov_s390xc;
6ec4e251 125extern const struct raid6_recov_calls raid6_recov_neon;
f2091321
WX		 126extern const struct raid6_recov_calls raid6_recov_lsx;
127extern const struct raid6_recov_calls raid6_recov_lasx;
048a8b8c 128
7d11965d
AB		 129extern const struct raid6_calls raid6_neonx1;
130extern const struct raid6_calls raid6_neonx2;
131extern const struct raid6_calls raid6_neonx4;
132extern const struct raid6_calls raid6_neonx8;
133
1da177e4
LT		 134/* Algorithm list */
135extern const struct raid6_calls * const raid6_algos[];
048a8b8c 136extern const struct raid6_recov_calls *const raid6_recov_algos[];
1da177e4
LT		 137int 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 */
146extern const u8 raid6_gfmul[256][256] __attribute__((aligned(256)));
048a8b8c 147extern const u8 raid6_vgfmul[256][32] __attribute__((aligned(256)));
1da177e4 148extern const u8 raid6_gfexp[256] __attribute__((aligned(256)));
b5dceda1 149extern const u8 raid6_gflog[256] __attribute__((aligned(256)));
1da177e4
LT		 150extern const u8 raid6_gfinv[256] __attribute__((aligned(256)));
151extern const u8 raid6_gfexi[256] __attribute__((aligned(256)));
152
153/* Recovery routines */
048a8b8c 154extern void (*raid6_2data_recov)(int disks, size_t bytes, int faila, int failb,
f701d589 155 void **ptrs);
048a8b8c
JK		 156extern void (*raid6_datap_recov)(int disks, size_t bytes, int faila,
157 void **ptrs);
f701d589
DW		 158void raid6_dual_recov(int disks, size_t bytes, int faila, int failb,
159 void **ptrs);
1da177e4
LT		 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
6a84f572
GK		 166# define pr_err(format, ...) fprintf(stderr, format, ## __VA_ARGS__)
167# define pr_info(format, ...) fprintf(stdout, format, ## __VA_ARGS__)
1da177e4 168# define GFP_KERNEL 0
f701d589
DW		 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))
38059ec2 173# define free_pages(x, y) munmap((void *)(x), PAGE_SIZE << (y))
1da177e4
LT		 174
175static inline void cpu_relax(void)
176{
177 /* Nothing */
178}
179
180#undef HZ
181#define HZ 1000
182static 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 */
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