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-rw-r--r--lib/raid6/recov_avx2.c313
1 files changed, 313 insertions, 0 deletions
diff --git a/lib/raid6/recov_avx2.c b/lib/raid6/recov_avx2.c
new file mode 100644
index 000000000..4e8095403
--- /dev/null
+++ b/lib/raid6/recov_avx2.c
@@ -0,0 +1,313 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2012 Intel Corporation
+ * Author: Jim Kukunas <james.t.kukunas@linux.intel.com>
+ */
+
+#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);
+}
+
+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();
+}
+
+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();
+}
+
+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,
+};
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-14 17:36:09 +0000