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recov_avx512.c
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recov_avx512.c
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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2016 Intel Corporation
*
* Author: Gayatri Kammela <[email protected]>
* Author: Megha Dey <[email protected]>
*/
#ifdef CONFIG_AS_AVX512
#include <linux/raid/pq.h>
#include "x86.h"
static int raid6_has_avx512(void)
{
return boot_cpu_has(X86_FEATURE_AVX2) &&
boot_cpu_has(X86_FEATURE_AVX) &&
boot_cpu_has(X86_FEATURE_AVX512F) &&
boot_cpu_has(X86_FEATURE_AVX512BW) &&
boot_cpu_has(X86_FEATURE_AVX512VL) &&
boot_cpu_has(X86_FEATURE_AVX512DQ);
}
static void raid6_2data_recov_avx512(int disks, size_t bytes, int faila,
int failb, void **ptrs)
{
u8 *p, *q, *dp, *dq;
const u8 *pbmul; /* P multiplier table for B data */
const u8 *qmul; /* Q multiplier table (for both) */
const u8 x0f = 0x0f;
p = (u8 *)ptrs[disks-2];
q = (u8 *)ptrs[disks-1];
/*
* Compute syndrome with zero for the missing data pages
* Use the dead data pages as temporary storage for
* delta p and delta q
*/
dp = (u8 *)ptrs[faila];
ptrs[faila] = (void *)raid6_empty_zero_page;
ptrs[disks-2] = dp;
dq = (u8 *)ptrs[failb];
ptrs[failb] = (void *)raid6_empty_zero_page;
ptrs[disks-1] = dq;
raid6_call.gen_syndrome(disks, bytes, ptrs);
/* Restore pointer table */
ptrs[faila] = dp;
ptrs[failb] = dq;
ptrs[disks-2] = p;
ptrs[disks-1] = q;
/* Now, pick the proper data tables */
pbmul = raid6_vgfmul[raid6_gfexi[failb-faila]];
qmul = raid6_vgfmul[raid6_gfinv[raid6_gfexp[faila] ^
raid6_gfexp[failb]]];
kernel_fpu_begin();
/* zmm0 = x0f[16] */
asm volatile("vpbroadcastb %0, %%zmm7" : : "m" (x0f));
while (bytes) {
#ifdef CONFIG_X86_64
asm volatile("vmovdqa64 %0, %%zmm1\n\t"
"vmovdqa64 %1, %%zmm9\n\t"
"vmovdqa64 %2, %%zmm0\n\t"
"vmovdqa64 %3, %%zmm8\n\t"
"vpxorq %4, %%zmm1, %%zmm1\n\t"
"vpxorq %5, %%zmm9, %%zmm9\n\t"
"vpxorq %6, %%zmm0, %%zmm0\n\t"
"vpxorq %7, %%zmm8, %%zmm8"
:
: "m" (q[0]), "m" (q[64]), "m" (p[0]),
"m" (p[64]), "m" (dq[0]), "m" (dq[64]),
"m" (dp[0]), "m" (dp[64]));
/*
* 1 = dq[0] ^ q[0]
* 9 = dq[64] ^ q[64]
* 0 = dp[0] ^ p[0]
* 8 = dp[64] ^ p[64]
*/
asm volatile("vbroadcasti64x2 %0, %%zmm4\n\t"
"vbroadcasti64x2 %1, %%zmm5"
:
: "m" (qmul[0]), "m" (qmul[16]));
asm volatile("vpsraw $4, %%zmm1, %%zmm3\n\t"
"vpsraw $4, %%zmm9, %%zmm12\n\t"
"vpandq %%zmm7, %%zmm1, %%zmm1\n\t"
"vpandq %%zmm7, %%zmm9, %%zmm9\n\t"
"vpandq %%zmm7, %%zmm3, %%zmm3\n\t"
"vpandq %%zmm7, %%zmm12, %%zmm12\n\t"
"vpshufb %%zmm9, %%zmm4, %%zmm14\n\t"
"vpshufb %%zmm1, %%zmm4, %%zmm4\n\t"
"vpshufb %%zmm12, %%zmm5, %%zmm15\n\t"
"vpshufb %%zmm3, %%zmm5, %%zmm5\n\t"
"vpxorq %%zmm14, %%zmm15, %%zmm15\n\t"
"vpxorq %%zmm4, %%zmm5, %%zmm5"
:
: );
/*
* 5 = qx[0]
* 15 = qx[64]
*/
asm volatile("vbroadcasti64x2 %0, %%zmm4\n\t"
"vbroadcasti64x2 %1, %%zmm1\n\t"
"vpsraw $4, %%zmm0, %%zmm2\n\t"
"vpsraw $4, %%zmm8, %%zmm6\n\t"
"vpandq %%zmm7, %%zmm0, %%zmm3\n\t"
"vpandq %%zmm7, %%zmm8, %%zmm14\n\t"
"vpandq %%zmm7, %%zmm2, %%zmm2\n\t"
"vpandq %%zmm7, %%zmm6, %%zmm6\n\t"
"vpshufb %%zmm14, %%zmm4, %%zmm12\n\t"
"vpshufb %%zmm3, %%zmm4, %%zmm4\n\t"
"vpshufb %%zmm6, %%zmm1, %%zmm13\n\t"
"vpshufb %%zmm2, %%zmm1, %%zmm1\n\t"
"vpxorq %%zmm4, %%zmm1, %%zmm1\n\t"
"vpxorq %%zmm12, %%zmm13, %%zmm13"
:
: "m" (pbmul[0]), "m" (pbmul[16]));
/*
* 1 = pbmul[px[0]]
* 13 = pbmul[px[64]]
*/
asm volatile("vpxorq %%zmm5, %%zmm1, %%zmm1\n\t"
"vpxorq %%zmm15, %%zmm13, %%zmm13"
:
: );
/*
* 1 = db = DQ
* 13 = db[64] = DQ[64]
*/
asm volatile("vmovdqa64 %%zmm1, %0\n\t"
"vmovdqa64 %%zmm13,%1\n\t"
"vpxorq %%zmm1, %%zmm0, %%zmm0\n\t"
"vpxorq %%zmm13, %%zmm8, %%zmm8"
:
: "m" (dq[0]), "m" (dq[64]));
asm volatile("vmovdqa64 %%zmm0, %0\n\t"
"vmovdqa64 %%zmm8, %1"
:
: "m" (dp[0]), "m" (dp[64]));
bytes -= 128;
p += 128;
q += 128;
dp += 128;
dq += 128;
#else
asm volatile("vmovdqa64 %0, %%zmm1\n\t"
"vmovdqa64 %1, %%zmm0\n\t"
"vpxorq %2, %%zmm1, %%zmm1\n\t"
"vpxorq %3, %%zmm0, %%zmm0"
:
: "m" (*q), "m" (*p), "m"(*dq), "m" (*dp));
/* 1 = dq ^ q; 0 = dp ^ p */
asm volatile("vbroadcasti64x2 %0, %%zmm4\n\t"
"vbroadcasti64x2 %1, %%zmm5"
:
: "m" (qmul[0]), "m" (qmul[16]));
/*
* 1 = dq ^ q
* 3 = dq ^ p >> 4
*/
asm volatile("vpsraw $4, %%zmm1, %%zmm3\n\t"
"vpandq %%zmm7, %%zmm1, %%zmm1\n\t"
"vpandq %%zmm7, %%zmm3, %%zmm3\n\t"
"vpshufb %%zmm1, %%zmm4, %%zmm4\n\t"
"vpshufb %%zmm3, %%zmm5, %%zmm5\n\t"
"vpxorq %%zmm4, %%zmm5, %%zmm5"
:
: );
/* 5 = qx */
asm volatile("vbroadcasti64x2 %0, %%zmm4\n\t"
"vbroadcasti64x2 %1, %%zmm1"
:
: "m" (pbmul[0]), "m" (pbmul[16]));
asm volatile("vpsraw $4, %%zmm0, %%zmm2\n\t"
"vpandq %%zmm7, %%zmm0, %%zmm3\n\t"
"vpandq %%zmm7, %%zmm2, %%zmm2\n\t"
"vpshufb %%zmm3, %%zmm4, %%zmm4\n\t"
"vpshufb %%zmm2, %%zmm1, %%zmm1\n\t"
"vpxorq %%zmm4, %%zmm1, %%zmm1"
:
: );
/* 1 = pbmul[px] */
asm volatile("vpxorq %%zmm5, %%zmm1, %%zmm1\n\t"
/* 1 = db = DQ */
"vmovdqa64 %%zmm1, %0\n\t"
:
: "m" (dq[0]));
asm volatile("vpxorq %%zmm1, %%zmm0, %%zmm0\n\t"
"vmovdqa64 %%zmm0, %0"
:
: "m" (dp[0]));
bytes -= 64;
p += 64;
q += 64;
dp += 64;
dq += 64;
#endif
}
kernel_fpu_end();
}
static void raid6_datap_recov_avx512(int disks, size_t bytes, int faila,
void **ptrs)
{
u8 *p, *q, *dq;
const u8 *qmul; /* Q multiplier table */
const u8 x0f = 0x0f;
p = (u8 *)ptrs[disks-2];
q = (u8 *)ptrs[disks-1];
/*
* Compute syndrome with zero for the missing data page
* Use the dead data page as temporary storage for delta q
*/
dq = (u8 *)ptrs[faila];
ptrs[faila] = (void *)raid6_empty_zero_page;
ptrs[disks-1] = dq;
raid6_call.gen_syndrome(disks, bytes, ptrs);
/* Restore pointer table */
ptrs[faila] = dq;
ptrs[disks-1] = q;
/* Now, pick the proper data tables */
qmul = raid6_vgfmul[raid6_gfinv[raid6_gfexp[faila]]];
kernel_fpu_begin();
asm volatile("vpbroadcastb %0, %%zmm7" : : "m" (x0f));
while (bytes) {
#ifdef CONFIG_X86_64
asm volatile("vmovdqa64 %0, %%zmm3\n\t"
"vmovdqa64 %1, %%zmm8\n\t"
"vpxorq %2, %%zmm3, %%zmm3\n\t"
"vpxorq %3, %%zmm8, %%zmm8"
:
: "m" (dq[0]), "m" (dq[64]), "m" (q[0]),
"m" (q[64]));
/*
* 3 = q[0] ^ dq[0]
* 8 = q[64] ^ dq[64]
*/
asm volatile("vbroadcasti64x2 %0, %%zmm0\n\t"
"vmovapd %%zmm0, %%zmm13\n\t"
"vbroadcasti64x2 %1, %%zmm1\n\t"
"vmovapd %%zmm1, %%zmm14"
:
: "m" (qmul[0]), "m" (qmul[16]));
asm volatile("vpsraw $4, %%zmm3, %%zmm6\n\t"
"vpsraw $4, %%zmm8, %%zmm12\n\t"
"vpandq %%zmm7, %%zmm3, %%zmm3\n\t"
"vpandq %%zmm7, %%zmm8, %%zmm8\n\t"
"vpandq %%zmm7, %%zmm6, %%zmm6\n\t"
"vpandq %%zmm7, %%zmm12, %%zmm12\n\t"
"vpshufb %%zmm3, %%zmm0, %%zmm0\n\t"
"vpshufb %%zmm8, %%zmm13, %%zmm13\n\t"
"vpshufb %%zmm6, %%zmm1, %%zmm1\n\t"
"vpshufb %%zmm12, %%zmm14, %%zmm14\n\t"
"vpxorq %%zmm0, %%zmm1, %%zmm1\n\t"
"vpxorq %%zmm13, %%zmm14, %%zmm14"
:
: );
/*
* 1 = qmul[q[0] ^ dq[0]]
* 14 = qmul[q[64] ^ dq[64]]
*/
asm volatile("vmovdqa64 %0, %%zmm2\n\t"
"vmovdqa64 %1, %%zmm12\n\t"
"vpxorq %%zmm1, %%zmm2, %%zmm2\n\t"
"vpxorq %%zmm14, %%zmm12, %%zmm12"
:
: "m" (p[0]), "m" (p[64]));
/*
* 2 = p[0] ^ qmul[q[0] ^ dq[0]]
* 12 = p[64] ^ qmul[q[64] ^ dq[64]]
*/
asm volatile("vmovdqa64 %%zmm1, %0\n\t"
"vmovdqa64 %%zmm14, %1\n\t"
"vmovdqa64 %%zmm2, %2\n\t"
"vmovdqa64 %%zmm12,%3"
:
: "m" (dq[0]), "m" (dq[64]), "m" (p[0]),
"m" (p[64]));
bytes -= 128;
p += 128;
q += 128;
dq += 128;
#else
asm volatile("vmovdqa64 %0, %%zmm3\n\t"
"vpxorq %1, %%zmm3, %%zmm3"
:
: "m" (dq[0]), "m" (q[0]));
/* 3 = q ^ dq */
asm volatile("vbroadcasti64x2 %0, %%zmm0\n\t"
"vbroadcasti64x2 %1, %%zmm1"
:
: "m" (qmul[0]), "m" (qmul[16]));
asm volatile("vpsraw $4, %%zmm3, %%zmm6\n\t"
"vpandq %%zmm7, %%zmm3, %%zmm3\n\t"
"vpandq %%zmm7, %%zmm6, %%zmm6\n\t"
"vpshufb %%zmm3, %%zmm0, %%zmm0\n\t"
"vpshufb %%zmm6, %%zmm1, %%zmm1\n\t"
"vpxorq %%zmm0, %%zmm1, %%zmm1"
:
: );
/* 1 = qmul[q ^ dq] */
asm volatile("vmovdqa64 %0, %%zmm2\n\t"
"vpxorq %%zmm1, %%zmm2, %%zmm2"
:
: "m" (p[0]));
/* 2 = p ^ qmul[q ^ dq] */
asm volatile("vmovdqa64 %%zmm1, %0\n\t"
"vmovdqa64 %%zmm2, %1"
:
: "m" (dq[0]), "m" (p[0]));
bytes -= 64;
p += 64;
q += 64;
dq += 64;
#endif
}
kernel_fpu_end();
}
const struct raid6_recov_calls raid6_recov_avx512 = {
.data2 = raid6_2data_recov_avx512,
.datap = raid6_datap_recov_avx512,
.valid = raid6_has_avx512,
#ifdef CONFIG_X86_64
.name = "avx512x2",
#else
.name = "avx512x1",
#endif
.priority = 3,
};
#else
#warning "your version of binutils lacks AVX512 support"
#endif