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review.trustedfirmware.org / hafnium / third_party / linux.git / 0e64123141f3854e695eb4924d82b52856691466 / . / include / linux / raid / pq.h
blob: e0ddb47f44020fd5498d60057fe89c51761b00cc [file] [log] [blame]
David Brazdil0f672f62019-12-10 10:32:29 +0000[diff] [blame]1/* SPDX-License-Identifier: GPL-2.0-or-later */
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame]2/* -*- linux-c -*- ------------------------------------------------------- *
3 *
4 * Copyright 2003 H. Peter Anvin - All Rights Reserved
5 *
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame]6 * ----------------------------------------------------------------------- */
7
8#ifndef LINUX_RAID_RAID6_H
9#define LINUX_RAID_RAID6_H
10
11#ifdef __KERNEL__
12
13/* Set to 1 to use kernel-wide empty_zero_page */
14#define RAID6_USE_EMPTY_ZERO_PAGE 0
15#include <linux/blkdev.h>
16
17/* We need a pre-zeroed page... if we don't want to use the kernel-provided
18 one define it here */
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 /* ! __KERNEL__ */
26/* Used for testing in user space */
27
28#include <errno.h>
29#include <inttypes.h>
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame]30#include <stddef.h>
31#include <sys/mman.h>
David Brazdil0f672f62019-12-10 10:32:29 +0000[diff] [blame]32#include <sys/time.h>
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame]33#include <sys/types.h>
34
35/* Not standard, but glibc defines it */
36#define BITS_PER_LONG __WORDSIZE
37
38typedef uint8_t u8;
39typedef uint16_t u16;
40typedef uint32_t u32;
41typedef uint64_t u64;
42
43#ifndef PAGE_SIZE
44# define PAGE_SIZE 4096
45#endif
46extern const char raid6_empty_zero_page[PAGE_SIZE];
47
48#define __init
49#define __exit
David Brazdil0f672f62019-12-10 10:32:29 +0000[diff] [blame]50#ifndef __attribute_const__
51# define __attribute_const__ __attribute__((const))
52#endif
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame]53#define noinline __attribute__((noinline))
54
55#define preempt_enable()
56#define preempt_disable()
57#define cpu_has_feature(x) 1
58#define enable_kernel_altivec()
59#define disable_kernel_altivec()
60
Olivier Deprez0e641232021-09-23 10:07:05 +0200[diff] [blame^]61#undef EXPORT_SYMBOL
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame]62#define EXPORT_SYMBOL(sym)
Olivier Deprez0e641232021-09-23 10:07:05 +0200[diff] [blame^]63#undef EXPORT_SYMBOL_GPL
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame]64#define EXPORT_SYMBOL_GPL(sym)
65#define MODULE_LICENSE(licence)
66#define MODULE_DESCRIPTION(desc)
67#define subsys_initcall(x)
68#define module_exit(x)
David Brazdil0f672f62019-12-10 10:32:29 +0000[diff] [blame]69
70#define IS_ENABLED(x) (x)
71#define CONFIG_RAID6_PQ_BENCHMARK 1
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame]72#endif /* __KERNEL__ */
73
74/* Routine choices */
75struct raid6_calls {
76 void (*gen_syndrome)(int, size_t, void **);
77 void (*xor_syndrome)(int, int, int, size_t, void **);
78 int (*valid)(void); /* Returns 1 if this routine set is usable */
79 const char *name; /* Name of this routine set */
80 int prefer; /* Has special performance attribute */
81};
82
83/* Selected algorithm */
84extern struct raid6_calls raid6_call;
85
86/* Various routine sets */
87extern const struct raid6_calls raid6_intx1;
88extern const struct raid6_calls raid6_intx2;
89extern const struct raid6_calls raid6_intx4;
90extern const struct raid6_calls raid6_intx8;
91extern const struct raid6_calls raid6_intx16;
92extern const struct raid6_calls raid6_intx32;
93extern const struct raid6_calls raid6_mmxx1;
94extern const struct raid6_calls raid6_mmxx2;
95extern const struct raid6_calls raid6_sse1x1;
96extern const struct raid6_calls raid6_sse1x2;
97extern const struct raid6_calls raid6_sse2x1;
98extern const struct raid6_calls raid6_sse2x2;
99extern const struct raid6_calls raid6_sse2x4;
100extern const struct raid6_calls raid6_altivec1;
101extern const struct raid6_calls raid6_altivec2;
102extern const struct raid6_calls raid6_altivec4;
103extern const struct raid6_calls raid6_altivec8;
104extern const struct raid6_calls raid6_avx2x1;
105extern const struct raid6_calls raid6_avx2x2;
106extern const struct raid6_calls raid6_avx2x4;
107extern const struct raid6_calls raid6_avx512x1;
108extern const struct raid6_calls raid6_avx512x2;
109extern const struct raid6_calls raid6_avx512x4;
110extern const struct raid6_calls raid6_s390vx8;
111extern const struct raid6_calls raid6_vpermxor1;
112extern const struct raid6_calls raid6_vpermxor2;
113extern const struct raid6_calls raid6_vpermxor4;
114extern const struct raid6_calls raid6_vpermxor8;
115
116struct raid6_recov_calls {
117 void (*data2)(int, size_t, int, int, void **);
118 void (*datap)(int, size_t, int, void **);
119 int (*valid)(void);
120 const char *name;
121 int priority;
122};
123
124extern const struct raid6_recov_calls raid6_recov_intx1;
125extern const struct raid6_recov_calls raid6_recov_ssse3;
126extern const struct raid6_recov_calls raid6_recov_avx2;
127extern const struct raid6_recov_calls raid6_recov_avx512;
128extern const struct raid6_recov_calls raid6_recov_s390xc;
129extern const struct raid6_recov_calls raid6_recov_neon;
130
131extern const struct raid6_calls raid6_neonx1;
132extern const struct raid6_calls raid6_neonx2;
133extern const struct raid6_calls raid6_neonx4;
134extern const struct raid6_calls raid6_neonx8;
135
136/* Algorithm list */
137extern const struct raid6_calls * const raid6_algos[];
138extern const struct raid6_recov_calls *const raid6_recov_algos[];
139int raid6_select_algo(void);
140
141/* Return values from chk_syndrome */
142#define RAID6_OK 0
143#define RAID6_P_BAD 1
144#define RAID6_Q_BAD 2
145#define RAID6_PQ_BAD 3
146
147/* Galois field tables */
148extern const u8 raid6_gfmul[256][256] __attribute__((aligned(256)));
149extern const u8 raid6_vgfmul[256][32] __attribute__((aligned(256)));
150extern const u8 raid6_gfexp[256] __attribute__((aligned(256)));
151extern const u8 raid6_gflog[256] __attribute__((aligned(256)));
152extern const u8 raid6_gfinv[256] __attribute__((aligned(256)));
153extern const u8 raid6_gfexi[256] __attribute__((aligned(256)));
154
155/* Recovery routines */
156extern void (*raid6_2data_recov)(int disks, size_t bytes, int faila, int failb,
157 void **ptrs);
158extern void (*raid6_datap_recov)(int disks, size_t bytes, int faila,
159 void **ptrs);
160void raid6_dual_recov(int disks, size_t bytes, int faila, int failb,
161 void **ptrs);
162
163/* Some definitions to allow code to be compiled for testing in userspace */
164#ifndef __KERNEL__
165
166# define jiffies raid6_jiffies()
167# define printk printf
168# define pr_err(format, ...) fprintf(stderr, format, ## __VA_ARGS__)
169# define pr_info(format, ...) fprintf(stdout, format, ## __VA_ARGS__)
170# define GFP_KERNEL 0
171# define __get_free_pages(x, y) ((unsigned long)mmap(NULL, PAGE_SIZE << (y), \
172 PROT_READ|PROT_WRITE, \
173 MAP_PRIVATE|MAP_ANONYMOUS,\
174 0, 0))
175# define free_pages(x, y) munmap((void *)(x), PAGE_SIZE << (y))
176
177static inline void cpu_relax(void)
178{
179 /* Nothing */
180}
181
182#undef HZ
183#define HZ 1000
184static inline uint32_t raid6_jiffies(void)
185{
186 struct timeval tv;
187 gettimeofday(&tv, NULL);
188 return tv.tv_sec*1000 + tv.tv_usec/1000;
189}
190
191#endif /* ! __KERNEL__ */
192
193#endif /* LINUX_RAID_RAID6_H */