3 files changed, 238 insertions, 0 deletions
diff --git a/include/linux/raid/detect.h b/include/linux/raid/detect.h
new file mode 100644
index 000000000..1f029a71c
--- /dev/null
+++ b/include/linux/raid/detect.h
@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+void md_autodetect_dev(dev_t dev);
+
+#ifdef CONFIG_BLK_DEV_MD
+void md_run_setup(void);
+#else
+static inline void md_run_setup(void)
+{
+}
+#endif
diff --git a/include/linux/raid/pq.h b/include/linux/raid/pq.h
new file mode 100644
index 000000000..d6e5a1feb
--- /dev/null
+++ b/include/linux/raid/pq.h
@@ -0,0 +1,197 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/* -*- linux-c -*- ------------------------------------------------------- *
+ *
+ *   Copyright 2003 H. Peter Anvin - All Rights Reserved
+ *
+ * ----------------------------------------------------------------------- */
+
+#ifndef LINUX_RAID_RAID6_H
+#define LINUX_RAID_RAID6_H
+
+#ifdef __KERNEL__
+
+/* Set to 1 to use kernel-wide empty_zero_page */
+#define RAID6_USE_EMPTY_ZERO_PAGE 0
+#include <linux/blkdev.h>
+
+/* We need a pre-zeroed page... if we don't want to use the kernel-provided
+   one define it here */
+#if RAID6_USE_EMPTY_ZERO_PAGE
+# define raid6_empty_zero_page empty_zero_page
+#else
+extern const char raid6_empty_zero_page[PAGE_SIZE];
+#endif
+
+#else /* ! __KERNEL__ */
+/* Used for testing in user space */
+
+#include <errno.h>
+#include <inttypes.h>
+#include <stddef.h>
+#include <string.h>
+#include <sys/mman.h>
+#include <sys/time.h>
+#include <sys/types.h>
+
+/* Not standard, but glibc defines it */
+#define BITS_PER_LONG __WORDSIZE
+
+typedef uint8_t  u8;
+typedef uint16_t u16;
+typedef uint32_t u32;
+typedef uint64_t u64;
+
+#ifndef PAGE_SIZE
+# define PAGE_SIZE 4096
+#endif
+#ifndef PAGE_SHIFT
+# define PAGE_SHIFT 12
+#endif
+extern const char raid6_empty_zero_page[PAGE_SIZE];
+
+#define __init
+#define __exit
+#ifndef __attribute_const__
+# define __attribute_const__ __attribute__((const))
+#endif
+#define noinline __attribute__((noinline))
+
+#define preempt_enable()
+#define preempt_disable()
+#define cpu_has_feature(x) 1
+#define enable_kernel_altivec()
+#define disable_kernel_altivec()
+
+#undef	EXPORT_SYMBOL
+#define EXPORT_SYMBOL(sym)
+#undef	EXPORT_SYMBOL_GPL
+#define EXPORT_SYMBOL_GPL(sym)
+#define MODULE_LICENSE(licence)
+#define MODULE_DESCRIPTION(desc)
+#define subsys_initcall(x)
+#define module_exit(x)
+
+#define IS_ENABLED(x) (x)
+#define CONFIG_RAID6_PQ_BENCHMARK 1
+#endif /* __KERNEL__ */
+
+/* Routine choices */
+struct raid6_calls {
+	void (*gen_syndrome)(int, size_t, void **);
+	void (*xor_syndrome)(int, int, int, size_t, void **);
+	int  (*valid)(void);	/* Returns 1 if this routine set is usable */
+	const char *name;	/* Name of this routine set */
+	int priority;		/* Relative priority ranking if non-zero */
+};
+
+/* Selected algorithm */
+extern struct raid6_calls raid6_call;
+
+/* Various routine sets */
+extern const struct raid6_calls raid6_intx1;
+extern const struct raid6_calls raid6_intx2;
+extern const struct raid6_calls raid6_intx4;
+extern const struct raid6_calls raid6_intx8;
+extern const struct raid6_calls raid6_intx16;
+extern const struct raid6_calls raid6_intx32;
+extern const struct raid6_calls raid6_mmxx1;
+extern const struct raid6_calls raid6_mmxx2;
+extern const struct raid6_calls raid6_sse1x1;
+extern const struct raid6_calls raid6_sse1x2;
+extern const struct raid6_calls raid6_sse2x1;
+extern const struct raid6_calls raid6_sse2x2;
+extern const struct raid6_calls raid6_sse2x4;
+extern const struct raid6_calls raid6_altivec1;
+extern const struct raid6_calls raid6_altivec2;
+extern const struct raid6_calls raid6_altivec4;
+extern const struct raid6_calls raid6_altivec8;
+extern const struct raid6_calls raid6_avx2x1;
+extern const struct raid6_calls raid6_avx2x2;
+extern const struct raid6_calls raid6_avx2x4;
+extern const struct raid6_calls raid6_avx512x1;
+extern const struct raid6_calls raid6_avx512x2;
+extern const struct raid6_calls raid6_avx512x4;
+extern const struct raid6_calls raid6_s390vx8;
+extern const struct raid6_calls raid6_vpermxor1;
+extern const struct raid6_calls raid6_vpermxor2;
+extern const struct raid6_calls raid6_vpermxor4;
+extern const struct raid6_calls raid6_vpermxor8;
+
+struct raid6_recov_calls {
+	void (*data2)(int, size_t, int, int, void **);
+	void (*datap)(int, size_t, int, void **);
+	int  (*valid)(void);
+	const char *name;
+	int priority;
+};
+
+extern const struct raid6_recov_calls raid6_recov_intx1;
+extern const struct raid6_recov_calls raid6_recov_ssse3;
+extern const struct raid6_recov_calls raid6_recov_avx2;
+extern const struct raid6_recov_calls raid6_recov_avx512;
+extern const struct raid6_recov_calls raid6_recov_s390xc;
+extern const struct raid6_recov_calls raid6_recov_neon;
+
+extern const struct raid6_calls raid6_neonx1;
+extern const struct raid6_calls raid6_neonx2;
+extern const struct raid6_calls raid6_neonx4;
+extern const struct raid6_calls raid6_neonx8;
+
+/* Algorithm list */
+extern const struct raid6_calls * const raid6_algos[];
+extern const struct raid6_recov_calls *const raid6_recov_algos[];
+int raid6_select_algo(void);
+
+/* Return values from chk_syndrome */
+#define RAID6_OK	0
+#define RAID6_P_BAD	1
+#define RAID6_Q_BAD	2
+#define RAID6_PQ_BAD	3
+
+/* Galois field tables */
+extern const u8 raid6_gfmul[256][256] __attribute__((aligned(256)));
+extern const u8 raid6_vgfmul[256][32] __attribute__((aligned(256)));
+extern const u8 raid6_gfexp[256]      __attribute__((aligned(256)));
+extern const u8 raid6_gflog[256]      __attribute__((aligned(256)));
+extern const u8 raid6_gfinv[256]      __attribute__((aligned(256)));
+extern const u8 raid6_gfexi[256]      __attribute__((aligned(256)));
+
+/* Recovery routines */
+extern void (*raid6_2data_recov)(int disks, size_t bytes, int faila, int failb,
+		       void **ptrs);
+extern void (*raid6_datap_recov)(int disks, size_t bytes, int faila,
+			void **ptrs);
+void raid6_dual_recov(int disks, size_t bytes, int faila, int failb,
+		      void **ptrs);
+
+/* Some definitions to allow code to be compiled for testing in userspace */
+#ifndef __KERNEL__
+
+# define jiffies	raid6_jiffies()
+# define printk 	printf
+# define pr_err(format, ...) fprintf(stderr, format, ## __VA_ARGS__)
+# define pr_info(format, ...) fprintf(stdout, format, ## __VA_ARGS__)
+# define GFP_KERNEL	0
+# define __get_free_pages(x, y)	((unsigned long)mmap(NULL, PAGE_SIZE << (y), \
+						     PROT_READ|PROT_WRITE,   \
+						     MAP_PRIVATE|MAP_ANONYMOUS,\
+						     0, 0))
+# define free_pages(x, y)	munmap((void *)(x), PAGE_SIZE << (y))
+
+static inline void cpu_relax(void)
+{
+	/* Nothing */
+}
+
+#undef  HZ
+#define HZ 1000
+static inline uint32_t raid6_jiffies(void)
+{
+	struct timeval tv;
+	gettimeofday(&tv, NULL);
+	return tv.tv_sec*1000 + tv.tv_usec/1000;
+}
+
+#endif /* ! __KERNEL__ */
+
+#endif /* LINUX_RAID_RAID6_H */
diff --git a/include/linux/raid/xor.h b/include/linux/raid/xor.h
new file mode 100644
index 000000000..51b811b62
--- /dev/null
+++ b/include/linux/raid/xor.h
@@ -0,0 +1,30 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _XOR_H
+#define _XOR_H
+
+#define MAX_XOR_BLOCKS 4
+
+extern void xor_blocks(unsigned int count, unsigned int bytes,
+	void *dest, void **srcs);
+
+struct xor_block_template {
+        struct xor_block_template *next;
+        const char *name;
+        int speed;
+	void (*do_2)(unsigned long, unsigned long * __restrict,
+		     const unsigned long * __restrict);
+	void (*do_3)(unsigned long, unsigned long * __restrict,
+		     const unsigned long * __restrict,
+		     const unsigned long * __restrict);
+	void (*do_4)(unsigned long, unsigned long * __restrict,
+		     const unsigned long * __restrict,
+		     const unsigned long * __restrict,
+		     const unsigned long * __restrict);
+	void (*do_5)(unsigned long, unsigned long * __restrict,
+		     const unsigned long * __restrict,
+		     const unsigned long * __restrict,
+		     const unsigned long * __restrict,
+		     const unsigned long * __restrict);
+};
+
+#endif