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Release 4.16 lib/raid6/recov_avx2.c

Directory: lib/raid6
/*
 * Copyright (C) 2012 Intel Corporation
 * Author: Jim Kukunas <james.t.kukunas@linux.intel.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; version 2
 * of the License.
 */

#ifdef CONFIG_AS_AVX2

#include <linux/raid/pq.h>
#include "x86.h"


static int raid6_has_avx2(void) { return boot_cpu_has(X86_FEATURE_AVX2) && boot_cpu_has(X86_FEATURE_AVX); }

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PersonTokensPropCommitsCommitProp
Jim Kukunas19100.00%1100.00%
Total19100.00%1100.00%


static void raid6_2data_recov_avx2(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(); /* ymm0 = x0f[16] */ asm volatile("vpbroadcastb %0, %%ymm7" : : "m" (x0f)); while (bytes) { #ifdef CONFIG_X86_64 asm volatile("vmovdqa %0, %%ymm1" : : "m" (q[0])); asm volatile("vmovdqa %0, %%ymm9" : : "m" (q[32])); asm volatile("vmovdqa %0, %%ymm0" : : "m" (p[0])); asm volatile("vmovdqa %0, %%ymm8" : : "m" (p[32])); asm volatile("vpxor %0, %%ymm1, %%ymm1" : : "m" (dq[0])); asm volatile("vpxor %0, %%ymm9, %%ymm9" : : "m" (dq[32])); asm volatile("vpxor %0, %%ymm0, %%ymm0" : : "m" (dp[0])); asm volatile("vpxor %0, %%ymm8, %%ymm8" : : "m" (dp[32])); /* * 1 = dq[0] ^ q[0] * 9 = dq[32] ^ q[32] * 0 = dp[0] ^ p[0] * 8 = dp[32] ^ p[32] */ asm volatile("vbroadcasti128 %0, %%ymm4" : : "m" (qmul[0])); asm volatile("vbroadcasti128 %0, %%ymm5" : : "m" (qmul[16])); asm volatile("vpsraw $4, %ymm1, %ymm3"); asm volatile("vpsraw $4, %ymm9, %ymm12"); asm volatile("vpand %ymm7, %ymm1, %ymm1"); asm volatile("vpand %ymm7, %ymm9, %ymm9"); asm volatile("vpand %ymm7, %ymm3, %ymm3"); asm volatile("vpand %ymm7, %ymm12, %ymm12"); asm volatile("vpshufb %ymm9, %ymm4, %ymm14"); asm volatile("vpshufb %ymm1, %ymm4, %ymm4"); asm volatile("vpshufb %ymm12, %ymm5, %ymm15"); asm volatile("vpshufb %ymm3, %ymm5, %ymm5"); asm volatile("vpxor %ymm14, %ymm15, %ymm15"); asm volatile("vpxor %ymm4, %ymm5, %ymm5"); /* * 5 = qx[0] * 15 = qx[32] */ asm volatile("vbroadcasti128 %0, %%ymm4" : : "m" (pbmul[0])); asm volatile("vbroadcasti128 %0, %%ymm1" : : "m" (pbmul[16])); asm volatile("vpsraw $4, %ymm0, %ymm2"); asm volatile("vpsraw $4, %ymm8, %ymm6"); asm volatile("vpand %ymm7, %ymm0, %ymm3"); asm volatile("vpand %ymm7, %ymm8, %ymm14"); asm volatile("vpand %ymm7, %ymm2, %ymm2"); asm volatile("vpand %ymm7, %ymm6, %ymm6"); asm volatile("vpshufb %ymm14, %ymm4, %ymm12"); asm volatile("vpshufb %ymm3, %ymm4, %ymm4"); asm volatile("vpshufb %ymm6, %ymm1, %ymm13"); asm volatile("vpshufb %ymm2, %ymm1, %ymm1"); asm volatile("vpxor %ymm4, %ymm1, %ymm1"); asm volatile("vpxor %ymm12, %ymm13, %ymm13"); /* * 1 = pbmul[px[0]] * 13 = pbmul[px[32]] */ asm volatile("vpxor %ymm5, %ymm1, %ymm1"); asm volatile("vpxor %ymm15, %ymm13, %ymm13"); /* * 1 = db = DQ * 13 = db[32] = DQ[32] */ asm volatile("vmovdqa %%ymm1, %0" : "=m" (dq[0])); asm volatile("vmovdqa %%ymm13,%0" : "=m" (dq[32])); asm volatile("vpxor %ymm1, %ymm0, %ymm0"); asm volatile("vpxor %ymm13, %ymm8, %ymm8"); asm volatile("vmovdqa %%ymm0, %0" : "=m" (dp[0])); asm volatile("vmovdqa %%ymm8, %0" : "=m" (dp[32])); bytes -= 64; p += 64; q += 64; dp += 64; dq += 64; #else asm volatile("vmovdqa %0, %%ymm1" : : "m" (*q)); asm volatile("vmovdqa %0, %%ymm0" : : "m" (*p)); asm volatile("vpxor %0, %%ymm1, %%ymm1" : : "m" (*dq)); asm volatile("vpxor %0, %%ymm0, %%ymm0" : : "m" (*dp)); /* 1 = dq ^ q; 0 = dp ^ p */ asm volatile("vbroadcasti128 %0, %%ymm4" : : "m" (qmul[0])); asm volatile("vbroadcasti128 %0, %%ymm5" : : "m" (qmul[16])); /* * 1 = dq ^ q * 3 = dq ^ p >> 4 */ asm volatile("vpsraw $4, %ymm1, %ymm3"); asm volatile("vpand %ymm7, %ymm1, %ymm1"); asm volatile("vpand %ymm7, %ymm3, %ymm3"); asm volatile("vpshufb %ymm1, %ymm4, %ymm4"); asm volatile("vpshufb %ymm3, %ymm5, %ymm5"); asm volatile("vpxor %ymm4, %ymm5, %ymm5"); /* 5 = qx */ asm volatile("vbroadcasti128 %0, %%ymm4" : : "m" (pbmul[0])); asm volatile("vbroadcasti128 %0, %%ymm1" : : "m" (pbmul[16])); asm volatile("vpsraw $4, %ymm0, %ymm2"); asm volatile("vpand %ymm7, %ymm0, %ymm3"); asm volatile("vpand %ymm7, %ymm2, %ymm2"); asm volatile("vpshufb %ymm3, %ymm4, %ymm4"); asm volatile("vpshufb %ymm2, %ymm1, %ymm1"); asm volatile("vpxor %ymm4, %ymm1, %ymm1"); /* 1 = pbmul[px] */ asm volatile("vpxor %ymm5, %ymm1, %ymm1"); /* 1 = db = DQ */ asm volatile("vmovdqa %%ymm1, %0" : "=m" (dq[0])); asm volatile("vpxor %ymm1, %ymm0, %ymm0"); asm volatile("vmovdqa %%ymm0, %0" : "=m" (dp[0])); bytes -= 32; p += 32; q += 32; dp += 32; dq += 32; #endif } kernel_fpu_end(); }

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PersonTokensPropCommitsCommitProp
Jim Kukunas494100.00%1100.00%
Total494100.00%1100.00%


static void raid6_datap_recov_avx2(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, %%ymm7" : : "m" (x0f)); while (bytes) { #ifdef CONFIG_X86_64 asm volatile("vmovdqa %0, %%ymm3" : : "m" (dq[0])); asm volatile("vmovdqa %0, %%ymm8" : : "m" (dq[32])); asm volatile("vpxor %0, %%ymm3, %%ymm3" : : "m" (q[0])); asm volatile("vpxor %0, %%ymm8, %%ymm8" : : "m" (q[32])); /* * 3 = q[0] ^ dq[0] * 8 = q[32] ^ dq[32] */ asm volatile("vbroadcasti128 %0, %%ymm0" : : "m" (qmul[0])); asm volatile("vmovapd %ymm0, %ymm13"); asm volatile("vbroadcasti128 %0, %%ymm1" : : "m" (qmul[16])); asm volatile("vmovapd %ymm1, %ymm14"); asm volatile("vpsraw $4, %ymm3, %ymm6"); asm volatile("vpsraw $4, %ymm8, %ymm12"); asm volatile("vpand %ymm7, %ymm3, %ymm3"); asm volatile("vpand %ymm7, %ymm8, %ymm8"); asm volatile("vpand %ymm7, %ymm6, %ymm6"); asm volatile("vpand %ymm7, %ymm12, %ymm12"); asm volatile("vpshufb %ymm3, %ymm0, %ymm0"); asm volatile("vpshufb %ymm8, %ymm13, %ymm13"); asm volatile("vpshufb %ymm6, %ymm1, %ymm1"); asm volatile("vpshufb %ymm12, %ymm14, %ymm14"); asm volatile("vpxor %ymm0, %ymm1, %ymm1"); asm volatile("vpxor %ymm13, %ymm14, %ymm14"); /* * 1 = qmul[q[0] ^ dq[0]] * 14 = qmul[q[32] ^ dq[32]] */ asm volatile("vmovdqa %0, %%ymm2" : : "m" (p[0])); asm volatile("vmovdqa %0, %%ymm12" : : "m" (p[32])); asm volatile("vpxor %ymm1, %ymm2, %ymm2"); asm volatile("vpxor %ymm14, %ymm12, %ymm12"); /* * 2 = p[0] ^ qmul[q[0] ^ dq[0]] * 12 = p[32] ^ qmul[q[32] ^ dq[32]] */ asm volatile("vmovdqa %%ymm1, %0" : "=m" (dq[0])); asm volatile("vmovdqa %%ymm14, %0" : "=m" (dq[32])); asm volatile("vmovdqa %%ymm2, %0" : "=m" (p[0])); asm volatile("vmovdqa %%ymm12,%0" : "=m" (p[32])); bytes -= 64; p += 64; q += 64; dq += 64; #else asm volatile("vmovdqa %0, %%ymm3" : : "m" (dq[0])); asm volatile("vpxor %0, %%ymm3, %%ymm3" : : "m" (q[0])); /* 3 = q ^ dq */ asm volatile("vbroadcasti128 %0, %%ymm0" : : "m" (qmul[0])); asm volatile("vbroadcasti128 %0, %%ymm1" : : "m" (qmul[16])); asm volatile("vpsraw $4, %ymm3, %ymm6"); asm volatile("vpand %ymm7, %ymm3, %ymm3"); asm volatile("vpand %ymm7, %ymm6, %ymm6"); asm volatile("vpshufb %ymm3, %ymm0, %ymm0"); asm volatile("vpshufb %ymm6, %ymm1, %ymm1"); asm volatile("vpxor %ymm0, %ymm1, %ymm1"); /* 1 = qmul[q ^ dq] */ asm volatile("vmovdqa %0, %%ymm2" : : "m" (p[0])); asm volatile("vpxor %ymm1, %ymm2, %ymm2"); /* 2 = p ^ qmul[q ^ dq] */ asm volatile("vmovdqa %%ymm1, %0" : "=m" (dq[0])); asm volatile("vmovdqa %%ymm2, %0" : "=m" (p[0])); bytes -= 32; p += 32; q += 32; dq += 32; #endif } kernel_fpu_end(); }

Contributors

PersonTokensPropCommitsCommitProp
Jim Kukunas328100.00%1100.00%
Total328100.00%1100.00%

const struct raid6_recov_calls raid6_recov_avx2 = { .data2 = raid6_2data_recov_avx2, .datap = raid6_datap_recov_avx2, .valid = raid6_has_avx2, #ifdef CONFIG_X86_64 .name = "avx2x2", #else .name = "avx2x1", #endif .priority = 2, }; #else #warning "your version of binutils lacks AVX2 support" #endif

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Jim Kukunas90099.78%150.00%
Jan Beulich20.22%150.00%
Total902100.00%2100.00%
Directory: lib/raid6
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