181 lines
4.3 KiB
C
181 lines
4.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
#ifndef _ASM_X86_XOR_AVX_H
|
|
#define _ASM_X86_XOR_AVX_H
|
|
|
|
/*
|
|
* Optimized RAID-5 checksumming functions for AVX
|
|
*
|
|
* Copyright (C) 2012 Intel Corporation
|
|
* Author: Jim Kukunas <james.t.kukunas@linux.intel.com>
|
|
*
|
|
* Based on Ingo Molnar and Zach Brown's respective MMX and SSE routines
|
|
*/
|
|
|
|
#ifdef CONFIG_AS_AVX
|
|
|
|
#include <linux/compiler.h>
|
|
#include <asm/fpu/api.h>
|
|
|
|
#define BLOCK4(i) \
|
|
BLOCK(32 * i, 0) \
|
|
BLOCK(32 * (i + 1), 1) \
|
|
BLOCK(32 * (i + 2), 2) \
|
|
BLOCK(32 * (i + 3), 3)
|
|
|
|
#define BLOCK16() \
|
|
BLOCK4(0) \
|
|
BLOCK4(4) \
|
|
BLOCK4(8) \
|
|
BLOCK4(12)
|
|
|
|
static void xor_avx_2(unsigned long bytes, unsigned long *p0, unsigned long *p1)
|
|
{
|
|
unsigned long lines = bytes >> 9;
|
|
|
|
kernel_fpu_begin();
|
|
|
|
while (lines--) {
|
|
#undef BLOCK
|
|
#define BLOCK(i, reg) \
|
|
do { \
|
|
asm volatile("vmovdqa %0, %%ymm" #reg : : "m" (p1[i / sizeof(*p1)])); \
|
|
asm volatile("vxorps %0, %%ymm" #reg ", %%ymm" #reg : : \
|
|
"m" (p0[i / sizeof(*p0)])); \
|
|
asm volatile("vmovdqa %%ymm" #reg ", %0" : \
|
|
"=m" (p0[i / sizeof(*p0)])); \
|
|
} while (0);
|
|
|
|
BLOCK16()
|
|
|
|
p0 = (unsigned long *)((uintptr_t)p0 + 512);
|
|
p1 = (unsigned long *)((uintptr_t)p1 + 512);
|
|
}
|
|
|
|
kernel_fpu_end();
|
|
}
|
|
|
|
static void xor_avx_3(unsigned long bytes, unsigned long *p0, unsigned long *p1,
|
|
unsigned long *p2)
|
|
{
|
|
unsigned long lines = bytes >> 9;
|
|
|
|
kernel_fpu_begin();
|
|
|
|
while (lines--) {
|
|
#undef BLOCK
|
|
#define BLOCK(i, reg) \
|
|
do { \
|
|
asm volatile("vmovdqa %0, %%ymm" #reg : : "m" (p2[i / sizeof(*p2)])); \
|
|
asm volatile("vxorps %0, %%ymm" #reg ", %%ymm" #reg : : \
|
|
"m" (p1[i / sizeof(*p1)])); \
|
|
asm volatile("vxorps %0, %%ymm" #reg ", %%ymm" #reg : : \
|
|
"m" (p0[i / sizeof(*p0)])); \
|
|
asm volatile("vmovdqa %%ymm" #reg ", %0" : \
|
|
"=m" (p0[i / sizeof(*p0)])); \
|
|
} while (0);
|
|
|
|
BLOCK16()
|
|
|
|
p0 = (unsigned long *)((uintptr_t)p0 + 512);
|
|
p1 = (unsigned long *)((uintptr_t)p1 + 512);
|
|
p2 = (unsigned long *)((uintptr_t)p2 + 512);
|
|
}
|
|
|
|
kernel_fpu_end();
|
|
}
|
|
|
|
static void xor_avx_4(unsigned long bytes, unsigned long *p0, unsigned long *p1,
|
|
unsigned long *p2, unsigned long *p3)
|
|
{
|
|
unsigned long lines = bytes >> 9;
|
|
|
|
kernel_fpu_begin();
|
|
|
|
while (lines--) {
|
|
#undef BLOCK
|
|
#define BLOCK(i, reg) \
|
|
do { \
|
|
asm volatile("vmovdqa %0, %%ymm" #reg : : "m" (p3[i / sizeof(*p3)])); \
|
|
asm volatile("vxorps %0, %%ymm" #reg ", %%ymm" #reg : : \
|
|
"m" (p2[i / sizeof(*p2)])); \
|
|
asm volatile("vxorps %0, %%ymm" #reg ", %%ymm" #reg : : \
|
|
"m" (p1[i / sizeof(*p1)])); \
|
|
asm volatile("vxorps %0, %%ymm" #reg ", %%ymm" #reg : : \
|
|
"m" (p0[i / sizeof(*p0)])); \
|
|
asm volatile("vmovdqa %%ymm" #reg ", %0" : \
|
|
"=m" (p0[i / sizeof(*p0)])); \
|
|
} while (0);
|
|
|
|
BLOCK16();
|
|
|
|
p0 = (unsigned long *)((uintptr_t)p0 + 512);
|
|
p1 = (unsigned long *)((uintptr_t)p1 + 512);
|
|
p2 = (unsigned long *)((uintptr_t)p2 + 512);
|
|
p3 = (unsigned long *)((uintptr_t)p3 + 512);
|
|
}
|
|
|
|
kernel_fpu_end();
|
|
}
|
|
|
|
static void xor_avx_5(unsigned long bytes, unsigned long *p0, unsigned long *p1,
|
|
unsigned long *p2, unsigned long *p3, unsigned long *p4)
|
|
{
|
|
unsigned long lines = bytes >> 9;
|
|
|
|
kernel_fpu_begin();
|
|
|
|
while (lines--) {
|
|
#undef BLOCK
|
|
#define BLOCK(i, reg) \
|
|
do { \
|
|
asm volatile("vmovdqa %0, %%ymm" #reg : : "m" (p4[i / sizeof(*p4)])); \
|
|
asm volatile("vxorps %0, %%ymm" #reg ", %%ymm" #reg : : \
|
|
"m" (p3[i / sizeof(*p3)])); \
|
|
asm volatile("vxorps %0, %%ymm" #reg ", %%ymm" #reg : : \
|
|
"m" (p2[i / sizeof(*p2)])); \
|
|
asm volatile("vxorps %0, %%ymm" #reg ", %%ymm" #reg : : \
|
|
"m" (p1[i / sizeof(*p1)])); \
|
|
asm volatile("vxorps %0, %%ymm" #reg ", %%ymm" #reg : : \
|
|
"m" (p0[i / sizeof(*p0)])); \
|
|
asm volatile("vmovdqa %%ymm" #reg ", %0" : \
|
|
"=m" (p0[i / sizeof(*p0)])); \
|
|
} while (0);
|
|
|
|
BLOCK16()
|
|
|
|
p0 = (unsigned long *)((uintptr_t)p0 + 512);
|
|
p1 = (unsigned long *)((uintptr_t)p1 + 512);
|
|
p2 = (unsigned long *)((uintptr_t)p2 + 512);
|
|
p3 = (unsigned long *)((uintptr_t)p3 + 512);
|
|
p4 = (unsigned long *)((uintptr_t)p4 + 512);
|
|
}
|
|
|
|
kernel_fpu_end();
|
|
}
|
|
|
|
static struct xor_block_template xor_block_avx = {
|
|
.name = "avx",
|
|
.do_2 = xor_avx_2,
|
|
.do_3 = xor_avx_3,
|
|
.do_4 = xor_avx_4,
|
|
.do_5 = xor_avx_5,
|
|
};
|
|
|
|
#define AVX_XOR_SPEED \
|
|
do { \
|
|
if (boot_cpu_has(X86_FEATURE_AVX) && boot_cpu_has(X86_FEATURE_OSXSAVE)) \
|
|
xor_speed(&xor_block_avx); \
|
|
} while (0)
|
|
|
|
#define AVX_SELECT(FASTEST) \
|
|
(boot_cpu_has(X86_FEATURE_AVX) && boot_cpu_has(X86_FEATURE_OSXSAVE) ? &xor_block_avx : FASTEST)
|
|
|
|
#else
|
|
|
|
#define AVX_XOR_SPEED {}
|
|
|
|
#define AVX_SELECT(FASTEST) (FASTEST)
|
|
|
|
#endif
|
|
#endif
|