mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2025-08-05 16:54:27 +00:00
6093faaf95
The assembly is originally based on the ARM NEON and int.uc, but uses RISC-V vector instructions to implement the RAID6 syndrome and recovery calculations. The functions are tested on QEMU running with the option "-icount shift=0": raid6: rvvx1 gen() 1008 MB/s raid6: rvvx2 gen() 1395 MB/s raid6: rvvx4 gen() 1584 MB/s raid6: rvvx8 gen() 1694 MB/s raid6: int64x8 gen() 113 MB/s raid6: int64x4 gen() 116 MB/s raid6: int64x2 gen() 272 MB/s raid6: int64x1 gen() 229 MB/s raid6: using algorithm rvvx8 gen() 1694 MB/s raid6: .... xor() 1000 MB/s, rmw enabled raid6: using rvv recovery algorithm [Charlie: - Fixup vector options] Signed-off-by: Charlie Jenkins <charlie@rivosinc.com> Signed-off-by: Chunyan Zhang <zhangchunyan@iscas.ac.cn> Reviewed-by: Charlie Jenkins <charlie@rivosinc.com> Tested-by: Charlie Jenkins <charlie@rivosinc.com> Link: https://lore.kernel.org/r/20250305083707.74218-1-zhangchunyan@iscas.ac.cn Signed-off-by: Alexandre Ghiti <alexghiti@rivosinc.com> Signed-off-by: Palmer Dabbelt <palmer@dabbelt.com>
39 lines
1.1 KiB
C
39 lines
1.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
/*
|
|
* Copyright 2024 Institute of Software, CAS.
|
|
*
|
|
* raid6/rvv.h
|
|
*
|
|
* Definitions for RISC-V RAID-6 code
|
|
*/
|
|
|
|
#define RAID6_RVV_WRAPPER(_n) \
|
|
static void raid6_rvv ## _n ## _gen_syndrome(int disks, \
|
|
size_t bytes, void **ptrs) \
|
|
{ \
|
|
void raid6_rvv ## _n ## _gen_syndrome_real(int d, \
|
|
unsigned long b, void **p); \
|
|
kernel_vector_begin(); \
|
|
raid6_rvv ## _n ## _gen_syndrome_real(disks, \
|
|
(unsigned long)bytes, ptrs); \
|
|
kernel_vector_end(); \
|
|
} \
|
|
static void raid6_rvv ## _n ## _xor_syndrome(int disks, \
|
|
int start, int stop, \
|
|
size_t bytes, void **ptrs) \
|
|
{ \
|
|
void raid6_rvv ## _n ## _xor_syndrome_real(int d, \
|
|
int s1, int s2, \
|
|
unsigned long b, void **p); \
|
|
kernel_vector_begin(); \
|
|
raid6_rvv ## _n ## _xor_syndrome_real(disks, \
|
|
start, stop, (unsigned long)bytes, ptrs); \
|
|
kernel_vector_end(); \
|
|
} \
|
|
struct raid6_calls const raid6_rvvx ## _n = { \
|
|
raid6_rvv ## _n ## _gen_syndrome, \
|
|
raid6_rvv ## _n ## _xor_syndrome, \
|
|
rvv_has_vector, \
|
|
"rvvx" #_n, \
|
|
0 \
|
|
}
|