1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * Copyright 2024 Institute of Software, CAS.
4 *
5 * raid6/rvv.h
6 *
7 * Definitions for RISC-V RAID-6 code
8 */
9
10#ifdef __KERNEL__
11#include <asm/vector.h>
12#else
13#define kernel_vector_begin()
14#define kernel_vector_end()
15#include <sys/auxv.h>
16#include <asm/hwcap.h>
17#define has_vector() (getauxval(AT_HWCAP) & COMPAT_HWCAP_ISA_V)
18#endif
19
20#include <linux/raid/pq.h>
21
22static int rvv_has_vector(void)
23{
24 return has_vector();
25}
26
27#define RAID6_RVV_WRAPPER(_n) \
28 static void raid6_rvv ## _n ## _gen_syndrome(int disks, \
29 size_t bytes, void **ptrs) \
30 { \
31 void raid6_rvv ## _n ## _gen_syndrome_real(int d, \
32 unsigned long b, void **p); \
33 kernel_vector_begin(); \
34 raid6_rvv ## _n ## _gen_syndrome_real(disks, \
35 (unsigned long)bytes, ptrs); \
36 kernel_vector_end(); \
37 } \
38 static void raid6_rvv ## _n ## _xor_syndrome(int disks, \
39 int start, int stop, \
40 size_t bytes, void **ptrs) \
41 { \
42 void raid6_rvv ## _n ## _xor_syndrome_real(int d, \
43 int s1, int s2, \
44 unsigned long b, void **p); \
45 kernel_vector_begin(); \
46 raid6_rvv ## _n ## _xor_syndrome_real(disks, \
47 start, stop, (unsigned long)bytes, ptrs); \
48 kernel_vector_end(); \
49 } \
50 struct raid6_calls const raid6_rvvx ## _n = { \
51 raid6_rvv ## _n ## _gen_syndrome, \
52 raid6_rvv ## _n ## _xor_syndrome, \
53 rvv_has_vector, \
54 "rvvx" #_n, \
55 0 \
56 }
57

source code of linux/lib/raid6/rvv.h