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328 lines
9.0 KiB
328 lines
9.0 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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*/ |
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#include <linux/raid/pq.h> |
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#include "x86.h" |
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static int raid6_has_ssse3(void) |
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{ |
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return boot_cpu_has(X86_FEATURE_XMM) && |
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boot_cpu_has(X86_FEATURE_XMM2) && |
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boot_cpu_has(X86_FEATURE_SSSE3); |
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} |
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static void raid6_2data_recov_ssse3(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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static const u8 __aligned(16) x0f[16] = { |
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0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, |
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0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 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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asm volatile("movdqa %0,%%xmm7" : : "m" (x0f[0])); |
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#ifdef CONFIG_X86_64 |
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asm volatile("movdqa %0,%%xmm6" : : "m" (qmul[0])); |
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asm volatile("movdqa %0,%%xmm14" : : "m" (pbmul[0])); |
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asm volatile("movdqa %0,%%xmm15" : : "m" (pbmul[16])); |
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#endif |
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/* Now do it... */ |
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while (bytes) { |
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#ifdef CONFIG_X86_64 |
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/* xmm6, xmm14, xmm15 */ |
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asm volatile("movdqa %0,%%xmm1" : : "m" (q[0])); |
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asm volatile("movdqa %0,%%xmm9" : : "m" (q[16])); |
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asm volatile("movdqa %0,%%xmm0" : : "m" (p[0])); |
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asm volatile("movdqa %0,%%xmm8" : : "m" (p[16])); |
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asm volatile("pxor %0,%%xmm1" : : "m" (dq[0])); |
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asm volatile("pxor %0,%%xmm9" : : "m" (dq[16])); |
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asm volatile("pxor %0,%%xmm0" : : "m" (dp[0])); |
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asm volatile("pxor %0,%%xmm8" : : "m" (dp[16])); |
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/* xmm0/8 = px */ |
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asm volatile("movdqa %xmm6,%xmm4"); |
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asm volatile("movdqa %0,%%xmm5" : : "m" (qmul[16])); |
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asm volatile("movdqa %xmm6,%xmm12"); |
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asm volatile("movdqa %xmm5,%xmm13"); |
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asm volatile("movdqa %xmm1,%xmm3"); |
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asm volatile("movdqa %xmm9,%xmm11"); |
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asm volatile("movdqa %xmm0,%xmm2"); /* xmm2/10 = px */ |
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asm volatile("movdqa %xmm8,%xmm10"); |
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asm volatile("psraw $4,%xmm1"); |
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asm volatile("psraw $4,%xmm9"); |
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asm volatile("pand %xmm7,%xmm3"); |
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asm volatile("pand %xmm7,%xmm11"); |
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asm volatile("pand %xmm7,%xmm1"); |
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asm volatile("pand %xmm7,%xmm9"); |
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asm volatile("pshufb %xmm3,%xmm4"); |
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asm volatile("pshufb %xmm11,%xmm12"); |
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asm volatile("pshufb %xmm1,%xmm5"); |
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asm volatile("pshufb %xmm9,%xmm13"); |
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asm volatile("pxor %xmm4,%xmm5"); |
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asm volatile("pxor %xmm12,%xmm13"); |
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/* xmm5/13 = qx */ |
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asm volatile("movdqa %xmm14,%xmm4"); |
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asm volatile("movdqa %xmm15,%xmm1"); |
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asm volatile("movdqa %xmm14,%xmm12"); |
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asm volatile("movdqa %xmm15,%xmm9"); |
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asm volatile("movdqa %xmm2,%xmm3"); |
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asm volatile("movdqa %xmm10,%xmm11"); |
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asm volatile("psraw $4,%xmm2"); |
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asm volatile("psraw $4,%xmm10"); |
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asm volatile("pand %xmm7,%xmm3"); |
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asm volatile("pand %xmm7,%xmm11"); |
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asm volatile("pand %xmm7,%xmm2"); |
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asm volatile("pand %xmm7,%xmm10"); |
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asm volatile("pshufb %xmm3,%xmm4"); |
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asm volatile("pshufb %xmm11,%xmm12"); |
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asm volatile("pshufb %xmm2,%xmm1"); |
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asm volatile("pshufb %xmm10,%xmm9"); |
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asm volatile("pxor %xmm4,%xmm1"); |
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asm volatile("pxor %xmm12,%xmm9"); |
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/* xmm1/9 = pbmul[px] */ |
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asm volatile("pxor %xmm5,%xmm1"); |
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asm volatile("pxor %xmm13,%xmm9"); |
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/* xmm1/9 = db = DQ */ |
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asm volatile("movdqa %%xmm1,%0" : "=m" (dq[0])); |
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asm volatile("movdqa %%xmm9,%0" : "=m" (dq[16])); |
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asm volatile("pxor %xmm1,%xmm0"); |
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asm volatile("pxor %xmm9,%xmm8"); |
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asm volatile("movdqa %%xmm0,%0" : "=m" (dp[0])); |
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asm volatile("movdqa %%xmm8,%0" : "=m" (dp[16])); |
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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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#else |
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asm volatile("movdqa %0,%%xmm1" : : "m" (*q)); |
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asm volatile("movdqa %0,%%xmm0" : : "m" (*p)); |
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asm volatile("pxor %0,%%xmm1" : : "m" (*dq)); |
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asm volatile("pxor %0,%%xmm0" : : "m" (*dp)); |
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/* 1 = dq ^ q |
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* 0 = dp ^ p |
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*/ |
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asm volatile("movdqa %0,%%xmm4" : : "m" (qmul[0])); |
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asm volatile("movdqa %0,%%xmm5" : : "m" (qmul[16])); |
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asm volatile("movdqa %xmm1,%xmm3"); |
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asm volatile("psraw $4,%xmm1"); |
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asm volatile("pand %xmm7,%xmm3"); |
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asm volatile("pand %xmm7,%xmm1"); |
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asm volatile("pshufb %xmm3,%xmm4"); |
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asm volatile("pshufb %xmm1,%xmm5"); |
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asm volatile("pxor %xmm4,%xmm5"); |
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asm volatile("movdqa %xmm0,%xmm2"); /* xmm2 = px */ |
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/* xmm5 = qx */ |
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asm volatile("movdqa %0,%%xmm4" : : "m" (pbmul[0])); |
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asm volatile("movdqa %0,%%xmm1" : : "m" (pbmul[16])); |
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asm volatile("movdqa %xmm2,%xmm3"); |
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asm volatile("psraw $4,%xmm2"); |
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asm volatile("pand %xmm7,%xmm3"); |
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asm volatile("pand %xmm7,%xmm2"); |
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asm volatile("pshufb %xmm3,%xmm4"); |
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asm volatile("pshufb %xmm2,%xmm1"); |
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asm volatile("pxor %xmm4,%xmm1"); |
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/* xmm1 = pbmul[px] */ |
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asm volatile("pxor %xmm5,%xmm1"); |
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/* xmm1 = db = DQ */ |
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asm volatile("movdqa %%xmm1,%0" : "=m" (*dq)); |
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asm volatile("pxor %xmm1,%xmm0"); |
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asm volatile("movdqa %%xmm0,%0" : "=m" (*dp)); |
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bytes -= 16; |
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p += 16; |
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q += 16; |
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dp += 16; |
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dq += 16; |
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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_ssse3(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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static const u8 __aligned(16) x0f[16] = { |
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0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, |
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0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 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("movdqa %0, %%xmm7" : : "m" (x0f[0])); |
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while (bytes) { |
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#ifdef CONFIG_X86_64 |
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asm volatile("movdqa %0, %%xmm3" : : "m" (dq[0])); |
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asm volatile("movdqa %0, %%xmm4" : : "m" (dq[16])); |
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asm volatile("pxor %0, %%xmm3" : : "m" (q[0])); |
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asm volatile("movdqa %0, %%xmm0" : : "m" (qmul[0])); |
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/* xmm3 = q[0] ^ dq[0] */ |
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asm volatile("pxor %0, %%xmm4" : : "m" (q[16])); |
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asm volatile("movdqa %0, %%xmm1" : : "m" (qmul[16])); |
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/* xmm4 = q[16] ^ dq[16] */ |
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asm volatile("movdqa %xmm3, %xmm6"); |
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asm volatile("movdqa %xmm4, %xmm8"); |
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/* xmm4 = xmm8 = q[16] ^ dq[16] */ |
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asm volatile("psraw $4, %xmm3"); |
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asm volatile("pand %xmm7, %xmm6"); |
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asm volatile("pand %xmm7, %xmm3"); |
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asm volatile("pshufb %xmm6, %xmm0"); |
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asm volatile("pshufb %xmm3, %xmm1"); |
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asm volatile("movdqa %0, %%xmm10" : : "m" (qmul[0])); |
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asm volatile("pxor %xmm0, %xmm1"); |
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asm volatile("movdqa %0, %%xmm11" : : "m" (qmul[16])); |
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/* xmm1 = qmul[q[0] ^ dq[0]] */ |
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asm volatile("psraw $4, %xmm4"); |
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asm volatile("pand %xmm7, %xmm8"); |
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asm volatile("pand %xmm7, %xmm4"); |
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asm volatile("pshufb %xmm8, %xmm10"); |
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asm volatile("pshufb %xmm4, %xmm11"); |
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asm volatile("movdqa %0, %%xmm2" : : "m" (p[0])); |
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asm volatile("pxor %xmm10, %xmm11"); |
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asm volatile("movdqa %0, %%xmm12" : : "m" (p[16])); |
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/* xmm11 = qmul[q[16] ^ dq[16]] */ |
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asm volatile("pxor %xmm1, %xmm2"); |
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/* xmm2 = p[0] ^ qmul[q[0] ^ dq[0]] */ |
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asm volatile("pxor %xmm11, %xmm12"); |
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/* xmm12 = p[16] ^ qmul[q[16] ^ dq[16]] */ |
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asm volatile("movdqa %%xmm1, %0" : "=m" (dq[0])); |
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asm volatile("movdqa %%xmm11, %0" : "=m" (dq[16])); |
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asm volatile("movdqa %%xmm2, %0" : "=m" (p[0])); |
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asm volatile("movdqa %%xmm12, %0" : "=m" (p[16])); |
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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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#else |
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asm volatile("movdqa %0, %%xmm3" : : "m" (dq[0])); |
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asm volatile("movdqa %0, %%xmm0" : : "m" (qmul[0])); |
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asm volatile("pxor %0, %%xmm3" : : "m" (q[0])); |
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asm volatile("movdqa %0, %%xmm1" : : "m" (qmul[16])); |
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/* xmm3 = *q ^ *dq */ |
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asm volatile("movdqa %xmm3, %xmm6"); |
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asm volatile("movdqa %0, %%xmm2" : : "m" (p[0])); |
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asm volatile("psraw $4, %xmm3"); |
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asm volatile("pand %xmm7, %xmm6"); |
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asm volatile("pand %xmm7, %xmm3"); |
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asm volatile("pshufb %xmm6, %xmm0"); |
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asm volatile("pshufb %xmm3, %xmm1"); |
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asm volatile("pxor %xmm0, %xmm1"); |
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/* xmm1 = qmul[*q ^ *dq */ |
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asm volatile("pxor %xmm1, %xmm2"); |
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/* xmm2 = *p ^ qmul[*q ^ *dq] */ |
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asm volatile("movdqa %%xmm1, %0" : "=m" (dq[0])); |
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asm volatile("movdqa %%xmm2, %0" : "=m" (p[0])); |
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bytes -= 16; |
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p += 16; |
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q += 16; |
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dq += 16; |
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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_ssse3 = { |
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.data2 = raid6_2data_recov_ssse3, |
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.datap = raid6_datap_recov_ssse3, |
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.valid = raid6_has_ssse3, |
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#ifdef CONFIG_X86_64 |
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.name = "ssse3x2", |
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#else |
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.name = "ssse3x1", |
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#endif |
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.priority = 1, |
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};
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