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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Copyright (C) 2012 Intel Corporation4 * Author: Jim Kukunas <james.t.kukunas@linux.intel.com>5 */6 7#include <linux/raid/pq.h>8#include "x86.h"9 10static int raid6_has_avx2(void)11{12 return boot_cpu_has(X86_FEATURE_AVX2) &&13 boot_cpu_has(X86_FEATURE_AVX);14}15 16static void raid6_2data_recov_avx2(int disks, size_t bytes, int faila,17 int failb, void **ptrs)18{19 u8 *p, *q, *dp, *dq;20 const u8 *pbmul; /* P multiplier table for B data */21 const u8 *qmul; /* Q multiplier table (for both) */22 const u8 x0f = 0x0f;23 24 p = (u8 *)ptrs[disks-2];25 q = (u8 *)ptrs[disks-1];26 27 /* Compute syndrome with zero for the missing data pages28 Use the dead data pages as temporary storage for29 delta p and delta q */30 dp = (u8 *)ptrs[faila];31 ptrs[faila] = (void *)raid6_empty_zero_page;32 ptrs[disks-2] = dp;33 dq = (u8 *)ptrs[failb];34 ptrs[failb] = (void *)raid6_empty_zero_page;35 ptrs[disks-1] = dq;36 37 raid6_call.gen_syndrome(disks, bytes, ptrs);38 39 /* Restore pointer table */40 ptrs[faila] = dp;41 ptrs[failb] = dq;42 ptrs[disks-2] = p;43 ptrs[disks-1] = q;44 45 /* Now, pick the proper data tables */46 pbmul = raid6_vgfmul[raid6_gfexi[failb-faila]];47 qmul = raid6_vgfmul[raid6_gfinv[raid6_gfexp[faila] ^48 raid6_gfexp[failb]]];49 50 kernel_fpu_begin();51 52 /* ymm0 = x0f[16] */53 asm volatile("vpbroadcastb %0, %%ymm7" : : "m" (x0f));54 55 while (bytes) {56#ifdef CONFIG_X86_6457 asm volatile("vmovdqa %0, %%ymm1" : : "m" (q[0]));58 asm volatile("vmovdqa %0, %%ymm9" : : "m" (q[32]));59 asm volatile("vmovdqa %0, %%ymm0" : : "m" (p[0]));60 asm volatile("vmovdqa %0, %%ymm8" : : "m" (p[32]));61 asm volatile("vpxor %0, %%ymm1, %%ymm1" : : "m" (dq[0]));62 asm volatile("vpxor %0, %%ymm9, %%ymm9" : : "m" (dq[32]));63 asm volatile("vpxor %0, %%ymm0, %%ymm0" : : "m" (dp[0]));64 asm volatile("vpxor %0, %%ymm8, %%ymm8" : : "m" (dp[32]));65 66 /*67 * 1 = dq[0] ^ q[0]68 * 9 = dq[32] ^ q[32]69 * 0 = dp[0] ^ p[0]70 * 8 = dp[32] ^ p[32]71 */72 73 asm volatile("vbroadcasti128 %0, %%ymm4" : : "m" (qmul[0]));74 asm volatile("vbroadcasti128 %0, %%ymm5" : : "m" (qmul[16]));75 76 asm volatile("vpsraw $4, %ymm1, %ymm3");77 asm volatile("vpsraw $4, %ymm9, %ymm12");78 asm volatile("vpand %ymm7, %ymm1, %ymm1");79 asm volatile("vpand %ymm7, %ymm9, %ymm9");80 asm volatile("vpand %ymm7, %ymm3, %ymm3");81 asm volatile("vpand %ymm7, %ymm12, %ymm12");82 asm volatile("vpshufb %ymm9, %ymm4, %ymm14");83 asm volatile("vpshufb %ymm1, %ymm4, %ymm4");84 asm volatile("vpshufb %ymm12, %ymm5, %ymm15");85 asm volatile("vpshufb %ymm3, %ymm5, %ymm5");86 asm volatile("vpxor %ymm14, %ymm15, %ymm15");87 asm volatile("vpxor %ymm4, %ymm5, %ymm5");88 89 /*90 * 5 = qx[0]91 * 15 = qx[32]92 */93 94 asm volatile("vbroadcasti128 %0, %%ymm4" : : "m" (pbmul[0]));95 asm volatile("vbroadcasti128 %0, %%ymm1" : : "m" (pbmul[16]));96 asm volatile("vpsraw $4, %ymm0, %ymm2");97 asm volatile("vpsraw $4, %ymm8, %ymm6");98 asm volatile("vpand %ymm7, %ymm0, %ymm3");99 asm volatile("vpand %ymm7, %ymm8, %ymm14");100 asm volatile("vpand %ymm7, %ymm2, %ymm2");101 asm volatile("vpand %ymm7, %ymm6, %ymm6");102 asm volatile("vpshufb %ymm14, %ymm4, %ymm12");103 asm volatile("vpshufb %ymm3, %ymm4, %ymm4");104 asm volatile("vpshufb %ymm6, %ymm1, %ymm13");105 asm volatile("vpshufb %ymm2, %ymm1, %ymm1");106 asm volatile("vpxor %ymm4, %ymm1, %ymm1");107 asm volatile("vpxor %ymm12, %ymm13, %ymm13");108 109 /*110 * 1 = pbmul[px[0]]111 * 13 = pbmul[px[32]]112 */113 asm volatile("vpxor %ymm5, %ymm1, %ymm1");114 asm volatile("vpxor %ymm15, %ymm13, %ymm13");115 116 /*117 * 1 = db = DQ118 * 13 = db[32] = DQ[32]119 */120 asm volatile("vmovdqa %%ymm1, %0" : "=m" (dq[0]));121 asm volatile("vmovdqa %%ymm13,%0" : "=m" (dq[32]));122 asm volatile("vpxor %ymm1, %ymm0, %ymm0");123 asm volatile("vpxor %ymm13, %ymm8, %ymm8");124 125 asm volatile("vmovdqa %%ymm0, %0" : "=m" (dp[0]));126 asm volatile("vmovdqa %%ymm8, %0" : "=m" (dp[32]));127 128 bytes -= 64;129 p += 64;130 q += 64;131 dp += 64;132 dq += 64;133#else134 asm volatile("vmovdqa %0, %%ymm1" : : "m" (*q));135 asm volatile("vmovdqa %0, %%ymm0" : : "m" (*p));136 asm volatile("vpxor %0, %%ymm1, %%ymm1" : : "m" (*dq));137 asm volatile("vpxor %0, %%ymm0, %%ymm0" : : "m" (*dp));138 139 /* 1 = dq ^ q; 0 = dp ^ p */140 141 asm volatile("vbroadcasti128 %0, %%ymm4" : : "m" (qmul[0]));142 asm volatile("vbroadcasti128 %0, %%ymm5" : : "m" (qmul[16]));143 144 /*145 * 1 = dq ^ q146 * 3 = dq ^ p >> 4147 */148 asm volatile("vpsraw $4, %ymm1, %ymm3");149 asm volatile("vpand %ymm7, %ymm1, %ymm1");150 asm volatile("vpand %ymm7, %ymm3, %ymm3");151 asm volatile("vpshufb %ymm1, %ymm4, %ymm4");152 asm volatile("vpshufb %ymm3, %ymm5, %ymm5");153 asm volatile("vpxor %ymm4, %ymm5, %ymm5");154 155 /* 5 = qx */156 157 asm volatile("vbroadcasti128 %0, %%ymm4" : : "m" (pbmul[0]));158 asm volatile("vbroadcasti128 %0, %%ymm1" : : "m" (pbmul[16]));159 160 asm volatile("vpsraw $4, %ymm0, %ymm2");161 asm volatile("vpand %ymm7, %ymm0, %ymm3");162 asm volatile("vpand %ymm7, %ymm2, %ymm2");163 asm volatile("vpshufb %ymm3, %ymm4, %ymm4");164 asm volatile("vpshufb %ymm2, %ymm1, %ymm1");165 asm volatile("vpxor %ymm4, %ymm1, %ymm1");166 167 /* 1 = pbmul[px] */168 asm volatile("vpxor %ymm5, %ymm1, %ymm1");169 /* 1 = db = DQ */170 asm volatile("vmovdqa %%ymm1, %0" : "=m" (dq[0]));171 172 asm volatile("vpxor %ymm1, %ymm0, %ymm0");173 asm volatile("vmovdqa %%ymm0, %0" : "=m" (dp[0]));174 175 bytes -= 32;176 p += 32;177 q += 32;178 dp += 32;179 dq += 32;180#endif181 }182 183 kernel_fpu_end();184}185 186static void raid6_datap_recov_avx2(int disks, size_t bytes, int faila,187 void **ptrs)188{189 u8 *p, *q, *dq;190 const u8 *qmul; /* Q multiplier table */191 const u8 x0f = 0x0f;192 193 p = (u8 *)ptrs[disks-2];194 q = (u8 *)ptrs[disks-1];195 196 /* Compute syndrome with zero for the missing data page197 Use the dead data page as temporary storage for delta q */198 dq = (u8 *)ptrs[faila];199 ptrs[faila] = (void *)raid6_empty_zero_page;200 ptrs[disks-1] = dq;201 202 raid6_call.gen_syndrome(disks, bytes, ptrs);203 204 /* Restore pointer table */205 ptrs[faila] = dq;206 ptrs[disks-1] = q;207 208 /* Now, pick the proper data tables */209 qmul = raid6_vgfmul[raid6_gfinv[raid6_gfexp[faila]]];210 211 kernel_fpu_begin();212 213 asm volatile("vpbroadcastb %0, %%ymm7" : : "m" (x0f));214 215 while (bytes) {216#ifdef CONFIG_X86_64217 asm volatile("vmovdqa %0, %%ymm3" : : "m" (dq[0]));218 asm volatile("vmovdqa %0, %%ymm8" : : "m" (dq[32]));219 asm volatile("vpxor %0, %%ymm3, %%ymm3" : : "m" (q[0]));220 asm volatile("vpxor %0, %%ymm8, %%ymm8" : : "m" (q[32]));221 222 /*223 * 3 = q[0] ^ dq[0]224 * 8 = q[32] ^ dq[32]225 */226 asm volatile("vbroadcasti128 %0, %%ymm0" : : "m" (qmul[0]));227 asm volatile("vmovapd %ymm0, %ymm13");228 asm volatile("vbroadcasti128 %0, %%ymm1" : : "m" (qmul[16]));229 asm volatile("vmovapd %ymm1, %ymm14");230 231 asm volatile("vpsraw $4, %ymm3, %ymm6");232 asm volatile("vpsraw $4, %ymm8, %ymm12");233 asm volatile("vpand %ymm7, %ymm3, %ymm3");234 asm volatile("vpand %ymm7, %ymm8, %ymm8");235 asm volatile("vpand %ymm7, %ymm6, %ymm6");236 asm volatile("vpand %ymm7, %ymm12, %ymm12");237 asm volatile("vpshufb %ymm3, %ymm0, %ymm0");238 asm volatile("vpshufb %ymm8, %ymm13, %ymm13");239 asm volatile("vpshufb %ymm6, %ymm1, %ymm1");240 asm volatile("vpshufb %ymm12, %ymm14, %ymm14");241 asm volatile("vpxor %ymm0, %ymm1, %ymm1");242 asm volatile("vpxor %ymm13, %ymm14, %ymm14");243 244 /*245 * 1 = qmul[q[0] ^ dq[0]]246 * 14 = qmul[q[32] ^ dq[32]]247 */248 asm volatile("vmovdqa %0, %%ymm2" : : "m" (p[0]));249 asm volatile("vmovdqa %0, %%ymm12" : : "m" (p[32]));250 asm volatile("vpxor %ymm1, %ymm2, %ymm2");251 asm volatile("vpxor %ymm14, %ymm12, %ymm12");252 253 /*254 * 2 = p[0] ^ qmul[q[0] ^ dq[0]]255 * 12 = p[32] ^ qmul[q[32] ^ dq[32]]256 */257 258 asm volatile("vmovdqa %%ymm1, %0" : "=m" (dq[0]));259 asm volatile("vmovdqa %%ymm14, %0" : "=m" (dq[32]));260 asm volatile("vmovdqa %%ymm2, %0" : "=m" (p[0]));261 asm volatile("vmovdqa %%ymm12,%0" : "=m" (p[32]));262 263 bytes -= 64;264 p += 64;265 q += 64;266 dq += 64;267#else268 asm volatile("vmovdqa %0, %%ymm3" : : "m" (dq[0]));269 asm volatile("vpxor %0, %%ymm3, %%ymm3" : : "m" (q[0]));270 271 /* 3 = q ^ dq */272 273 asm volatile("vbroadcasti128 %0, %%ymm0" : : "m" (qmul[0]));274 asm volatile("vbroadcasti128 %0, %%ymm1" : : "m" (qmul[16]));275 276 asm volatile("vpsraw $4, %ymm3, %ymm6");277 asm volatile("vpand %ymm7, %ymm3, %ymm3");278 asm volatile("vpand %ymm7, %ymm6, %ymm6");279 asm volatile("vpshufb %ymm3, %ymm0, %ymm0");280 asm volatile("vpshufb %ymm6, %ymm1, %ymm1");281 asm volatile("vpxor %ymm0, %ymm1, %ymm1");282 283 /* 1 = qmul[q ^ dq] */284 285 asm volatile("vmovdqa %0, %%ymm2" : : "m" (p[0]));286 asm volatile("vpxor %ymm1, %ymm2, %ymm2");287 288 /* 2 = p ^ qmul[q ^ dq] */289 290 asm volatile("vmovdqa %%ymm1, %0" : "=m" (dq[0]));291 asm volatile("vmovdqa %%ymm2, %0" : "=m" (p[0]));292 293 bytes -= 32;294 p += 32;295 q += 32;296 dq += 32;297#endif298 }299 300 kernel_fpu_end();301}302 303const struct raid6_recov_calls raid6_recov_avx2 = {304 .data2 = raid6_2data_recov_avx2,305 .datap = raid6_datap_recov_avx2,306 .valid = raid6_has_avx2,307#ifdef CONFIG_X86_64308 .name = "avx2x2",309#else310 .name = "avx2x1",311#endif312 .priority = 2,313};314