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313 lines
8.8 KiB
313 lines
8.8 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Copyright (C) 2012 Intel Corporation |
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* Author: Jim Kukunas <[email protected]> |
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*/ |
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#include <linux/raid/pq.h> |
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#include "x86.h" |
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static int raid6_has_avx2(void) |
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{ |
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return boot_cpu_has(X86_FEATURE_AVX2) && |
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boot_cpu_has(X86_FEATURE_AVX); |
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} |
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static void raid6_2data_recov_avx2(int disks, size_t bytes, int faila, |
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int failb, void **ptrs) |
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{ |
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u8 *p, *q, *dp, *dq; |
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const u8 *pbmul; /* P multiplier table for B data */ |
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const u8 *qmul; /* Q multiplier table (for both) */ |
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const u8 x0f = 0x0f; |
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p = (u8 *)ptrs[disks-2]; |
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q = (u8 *)ptrs[disks-1]; |
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/* Compute syndrome with zero for the missing data pages |
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Use the dead data pages as temporary storage for |
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delta p and delta q */ |
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dp = (u8 *)ptrs[faila]; |
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ptrs[faila] = (void *)raid6_empty_zero_page; |
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ptrs[disks-2] = dp; |
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dq = (u8 *)ptrs[failb]; |
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ptrs[failb] = (void *)raid6_empty_zero_page; |
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ptrs[disks-1] = dq; |
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raid6_call.gen_syndrome(disks, bytes, ptrs); |
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/* Restore pointer table */ |
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ptrs[faila] = dp; |
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ptrs[failb] = dq; |
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ptrs[disks-2] = p; |
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ptrs[disks-1] = q; |
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/* Now, pick the proper data tables */ |
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pbmul = raid6_vgfmul[raid6_gfexi[failb-faila]]; |
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qmul = raid6_vgfmul[raid6_gfinv[raid6_gfexp[faila] ^ |
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raid6_gfexp[failb]]]; |
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kernel_fpu_begin(); |
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/* ymm0 = x0f[16] */ |
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asm volatile("vpbroadcastb %0, %%ymm7" : : "m" (x0f)); |
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while (bytes) { |
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#ifdef CONFIG_X86_64 |
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asm volatile("vmovdqa %0, %%ymm1" : : "m" (q[0])); |
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asm volatile("vmovdqa %0, %%ymm9" : : "m" (q[32])); |
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asm volatile("vmovdqa %0, %%ymm0" : : "m" (p[0])); |
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asm volatile("vmovdqa %0, %%ymm8" : : "m" (p[32])); |
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asm volatile("vpxor %0, %%ymm1, %%ymm1" : : "m" (dq[0])); |
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asm volatile("vpxor %0, %%ymm9, %%ymm9" : : "m" (dq[32])); |
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asm volatile("vpxor %0, %%ymm0, %%ymm0" : : "m" (dp[0])); |
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asm volatile("vpxor %0, %%ymm8, %%ymm8" : : "m" (dp[32])); |
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/* |
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* 1 = dq[0] ^ q[0] |
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* 9 = dq[32] ^ q[32] |
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* 0 = dp[0] ^ p[0] |
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* 8 = dp[32] ^ p[32] |
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*/ |
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asm volatile("vbroadcasti128 %0, %%ymm4" : : "m" (qmul[0])); |
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asm volatile("vbroadcasti128 %0, %%ymm5" : : "m" (qmul[16])); |
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asm volatile("vpsraw $4, %ymm1, %ymm3"); |
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asm volatile("vpsraw $4, %ymm9, %ymm12"); |
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asm volatile("vpand %ymm7, %ymm1, %ymm1"); |
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asm volatile("vpand %ymm7, %ymm9, %ymm9"); |
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asm volatile("vpand %ymm7, %ymm3, %ymm3"); |
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asm volatile("vpand %ymm7, %ymm12, %ymm12"); |
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asm volatile("vpshufb %ymm9, %ymm4, %ymm14"); |
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asm volatile("vpshufb %ymm1, %ymm4, %ymm4"); |
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asm volatile("vpshufb %ymm12, %ymm5, %ymm15"); |
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asm volatile("vpshufb %ymm3, %ymm5, %ymm5"); |
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asm volatile("vpxor %ymm14, %ymm15, %ymm15"); |
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asm volatile("vpxor %ymm4, %ymm5, %ymm5"); |
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/* |
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* 5 = qx[0] |
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* 15 = qx[32] |
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*/ |
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asm volatile("vbroadcasti128 %0, %%ymm4" : : "m" (pbmul[0])); |
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asm volatile("vbroadcasti128 %0, %%ymm1" : : "m" (pbmul[16])); |
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asm volatile("vpsraw $4, %ymm0, %ymm2"); |
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asm volatile("vpsraw $4, %ymm8, %ymm6"); |
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asm volatile("vpand %ymm7, %ymm0, %ymm3"); |
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asm volatile("vpand %ymm7, %ymm8, %ymm14"); |
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asm volatile("vpand %ymm7, %ymm2, %ymm2"); |
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asm volatile("vpand %ymm7, %ymm6, %ymm6"); |
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asm volatile("vpshufb %ymm14, %ymm4, %ymm12"); |
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asm volatile("vpshufb %ymm3, %ymm4, %ymm4"); |
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asm volatile("vpshufb %ymm6, %ymm1, %ymm13"); |
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asm volatile("vpshufb %ymm2, %ymm1, %ymm1"); |
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asm volatile("vpxor %ymm4, %ymm1, %ymm1"); |
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asm volatile("vpxor %ymm12, %ymm13, %ymm13"); |
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/* |
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* 1 = pbmul[px[0]] |
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* 13 = pbmul[px[32]] |
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*/ |
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asm volatile("vpxor %ymm5, %ymm1, %ymm1"); |
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asm volatile("vpxor %ymm15, %ymm13, %ymm13"); |
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/* |
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* 1 = db = DQ |
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* 13 = db[32] = DQ[32] |
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*/ |
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asm volatile("vmovdqa %%ymm1, %0" : "=m" (dq[0])); |
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asm volatile("vmovdqa %%ymm13,%0" : "=m" (dq[32])); |
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asm volatile("vpxor %ymm1, %ymm0, %ymm0"); |
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asm volatile("vpxor %ymm13, %ymm8, %ymm8"); |
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asm volatile("vmovdqa %%ymm0, %0" : "=m" (dp[0])); |
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asm volatile("vmovdqa %%ymm8, %0" : "=m" (dp[32])); |
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bytes -= 64; |
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p += 64; |
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q += 64; |
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dp += 64; |
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dq += 64; |
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#else |
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asm volatile("vmovdqa %0, %%ymm1" : : "m" (*q)); |
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asm volatile("vmovdqa %0, %%ymm0" : : "m" (*p)); |
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asm volatile("vpxor %0, %%ymm1, %%ymm1" : : "m" (*dq)); |
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asm volatile("vpxor %0, %%ymm0, %%ymm0" : : "m" (*dp)); |
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/* 1 = dq ^ q; 0 = dp ^ p */ |
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asm volatile("vbroadcasti128 %0, %%ymm4" : : "m" (qmul[0])); |
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asm volatile("vbroadcasti128 %0, %%ymm5" : : "m" (qmul[16])); |
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/* |
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* 1 = dq ^ q |
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* 3 = dq ^ p >> 4 |
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*/ |
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asm volatile("vpsraw $4, %ymm1, %ymm3"); |
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asm volatile("vpand %ymm7, %ymm1, %ymm1"); |
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asm volatile("vpand %ymm7, %ymm3, %ymm3"); |
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asm volatile("vpshufb %ymm1, %ymm4, %ymm4"); |
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asm volatile("vpshufb %ymm3, %ymm5, %ymm5"); |
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asm volatile("vpxor %ymm4, %ymm5, %ymm5"); |
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/* 5 = qx */ |
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asm volatile("vbroadcasti128 %0, %%ymm4" : : "m" (pbmul[0])); |
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asm volatile("vbroadcasti128 %0, %%ymm1" : : "m" (pbmul[16])); |
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asm volatile("vpsraw $4, %ymm0, %ymm2"); |
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asm volatile("vpand %ymm7, %ymm0, %ymm3"); |
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asm volatile("vpand %ymm7, %ymm2, %ymm2"); |
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asm volatile("vpshufb %ymm3, %ymm4, %ymm4"); |
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asm volatile("vpshufb %ymm2, %ymm1, %ymm1"); |
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asm volatile("vpxor %ymm4, %ymm1, %ymm1"); |
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/* 1 = pbmul[px] */ |
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asm volatile("vpxor %ymm5, %ymm1, %ymm1"); |
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/* 1 = db = DQ */ |
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asm volatile("vmovdqa %%ymm1, %0" : "=m" (dq[0])); |
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asm volatile("vpxor %ymm1, %ymm0, %ymm0"); |
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asm volatile("vmovdqa %%ymm0, %0" : "=m" (dp[0])); |
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bytes -= 32; |
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p += 32; |
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q += 32; |
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dp += 32; |
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dq += 32; |
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#endif |
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} |
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kernel_fpu_end(); |
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} |
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static void raid6_datap_recov_avx2(int disks, size_t bytes, int faila, |
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void **ptrs) |
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{ |
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u8 *p, *q, *dq; |
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const u8 *qmul; /* Q multiplier table */ |
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const u8 x0f = 0x0f; |
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p = (u8 *)ptrs[disks-2]; |
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q = (u8 *)ptrs[disks-1]; |
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/* Compute syndrome with zero for the missing data page |
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Use the dead data page as temporary storage for delta q */ |
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dq = (u8 *)ptrs[faila]; |
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ptrs[faila] = (void *)raid6_empty_zero_page; |
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ptrs[disks-1] = dq; |
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raid6_call.gen_syndrome(disks, bytes, ptrs); |
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/* Restore pointer table */ |
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ptrs[faila] = dq; |
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ptrs[disks-1] = q; |
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/* Now, pick the proper data tables */ |
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qmul = raid6_vgfmul[raid6_gfinv[raid6_gfexp[faila]]]; |
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kernel_fpu_begin(); |
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asm volatile("vpbroadcastb %0, %%ymm7" : : "m" (x0f)); |
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while (bytes) { |
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#ifdef CONFIG_X86_64 |
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asm volatile("vmovdqa %0, %%ymm3" : : "m" (dq[0])); |
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asm volatile("vmovdqa %0, %%ymm8" : : "m" (dq[32])); |
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asm volatile("vpxor %0, %%ymm3, %%ymm3" : : "m" (q[0])); |
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asm volatile("vpxor %0, %%ymm8, %%ymm8" : : "m" (q[32])); |
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/* |
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* 3 = q[0] ^ dq[0] |
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* 8 = q[32] ^ dq[32] |
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*/ |
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asm volatile("vbroadcasti128 %0, %%ymm0" : : "m" (qmul[0])); |
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asm volatile("vmovapd %ymm0, %ymm13"); |
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asm volatile("vbroadcasti128 %0, %%ymm1" : : "m" (qmul[16])); |
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asm volatile("vmovapd %ymm1, %ymm14"); |
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asm volatile("vpsraw $4, %ymm3, %ymm6"); |
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asm volatile("vpsraw $4, %ymm8, %ymm12"); |
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asm volatile("vpand %ymm7, %ymm3, %ymm3"); |
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asm volatile("vpand %ymm7, %ymm8, %ymm8"); |
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asm volatile("vpand %ymm7, %ymm6, %ymm6"); |
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asm volatile("vpand %ymm7, %ymm12, %ymm12"); |
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asm volatile("vpshufb %ymm3, %ymm0, %ymm0"); |
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asm volatile("vpshufb %ymm8, %ymm13, %ymm13"); |
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asm volatile("vpshufb %ymm6, %ymm1, %ymm1"); |
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asm volatile("vpshufb %ymm12, %ymm14, %ymm14"); |
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asm volatile("vpxor %ymm0, %ymm1, %ymm1"); |
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asm volatile("vpxor %ymm13, %ymm14, %ymm14"); |
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/* |
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* 1 = qmul[q[0] ^ dq[0]] |
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* 14 = qmul[q[32] ^ dq[32]] |
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*/ |
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asm volatile("vmovdqa %0, %%ymm2" : : "m" (p[0])); |
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asm volatile("vmovdqa %0, %%ymm12" : : "m" (p[32])); |
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asm volatile("vpxor %ymm1, %ymm2, %ymm2"); |
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asm volatile("vpxor %ymm14, %ymm12, %ymm12"); |
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/* |
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* 2 = p[0] ^ qmul[q[0] ^ dq[0]] |
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* 12 = p[32] ^ qmul[q[32] ^ dq[32]] |
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*/ |
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asm volatile("vmovdqa %%ymm1, %0" : "=m" (dq[0])); |
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asm volatile("vmovdqa %%ymm14, %0" : "=m" (dq[32])); |
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asm volatile("vmovdqa %%ymm2, %0" : "=m" (p[0])); |
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asm volatile("vmovdqa %%ymm12,%0" : "=m" (p[32])); |
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bytes -= 64; |
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p += 64; |
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q += 64; |
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dq += 64; |
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#else |
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asm volatile("vmovdqa %0, %%ymm3" : : "m" (dq[0])); |
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asm volatile("vpxor %0, %%ymm3, %%ymm3" : : "m" (q[0])); |
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/* 3 = q ^ dq */ |
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asm volatile("vbroadcasti128 %0, %%ymm0" : : "m" (qmul[0])); |
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asm volatile("vbroadcasti128 %0, %%ymm1" : : "m" (qmul[16])); |
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asm volatile("vpsraw $4, %ymm3, %ymm6"); |
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asm volatile("vpand %ymm7, %ymm3, %ymm3"); |
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asm volatile("vpand %ymm7, %ymm6, %ymm6"); |
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asm volatile("vpshufb %ymm3, %ymm0, %ymm0"); |
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asm volatile("vpshufb %ymm6, %ymm1, %ymm1"); |
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asm volatile("vpxor %ymm0, %ymm1, %ymm1"); |
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/* 1 = qmul[q ^ dq] */ |
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asm volatile("vmovdqa %0, %%ymm2" : : "m" (p[0])); |
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asm volatile("vpxor %ymm1, %ymm2, %ymm2"); |
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/* 2 = p ^ qmul[q ^ dq] */ |
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asm volatile("vmovdqa %%ymm1, %0" : "=m" (dq[0])); |
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asm volatile("vmovdqa %%ymm2, %0" : "=m" (p[0])); |
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bytes -= 32; |
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p += 32; |
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q += 32; |
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dq += 32; |
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#endif |
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} |
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kernel_fpu_end(); |
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} |
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const struct raid6_recov_calls raid6_recov_avx2 = { |
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.data2 = raid6_2data_recov_avx2, |
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.datap = raid6_datap_recov_avx2, |
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.valid = raid6_has_avx2, |
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#ifdef CONFIG_X86_64 |
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.name = "avx2x2", |
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#else |
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.name = "avx2x1", |
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#endif |
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.priority = 2, |
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};
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