--- /dev/null
+/*
+ * Copyright (C) 2016 Intel Corporation
+ *
+ * Author: Gayatri Kammela <gayatri.kammela@intel.com>
+ * Author: Megha Dey <megha.dey@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_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
projects / karo-tx-linux.git / commitdiff