LLCFLAGS="-g -Wall -fPIC -D_GNU_SOURCE"
AC_SUBST(LLCFLAGS)
+CCASFLAGS="-Wall -fPIC -D_GNU_SOURCE"
+AC_SUBST(CCASFLAGS)
+
# everyone builds against lnet and lustre
EXTRA_KCFLAGS="$EXTRA_KCFLAGS -g -I$PWD/$LIBCFS_INCLUDE_DIR -I$PWD/lnet/include -I$PWD/lustre/include"
AC_SUBST(EXTRA_KCFLAGS)
AM_CONDITIONAL(CRAY_XT3, test x$enable_cray_xt3 = "xyes")
AM_CONDITIONAL(SUNOS, test x$lb_target_os = "xSunOS")
AM_CONDITIONAL(USES_DPKG, test x$uses_dpkg = "xyes")
+AM_CONDITIONAL(ARCH_x86, test x$target_cpu != "xpowerpc")
# this lets lustre cancel libsysio, per-branch or if liblustre is
# disabled
AC_PROG_CC
+AM_PROG_AS
+
LB_CONFIGURE
EXTRA_DIST := curproc.h libcfs_private.h libcfs.h list.h lltrace.h \
user-lock.h user-prim.h user-time.h user-mem.h \
- user-tcpip.h user-bitops.h bitmap.h \
+ user-tcpip.h user-bitops.h bitmap.h user-crypto.h \
libcfs_prim.h libcfs_time.h libcfs_hash.h libcfs_cpu.h \
libcfs_debug.h libcfsutil.h libcfs_ioctl.h \
libcfs_pack.h libcfs_unpack.h libcfs_string.h \
*/
int cfs_crypto_adler32_register(void);
void cfs_crypto_adler32_unregister(void);
+
+/**
+ * Functions for start/stop shash crc32 pclmulqdq
+ */
+int cfs_crypto_crc32_pclmul_register(void);
+void cfs_crypto_crc32_pclmul_unregister(void);
--- /dev/null
+/* GPL HEADER START
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; If not, see http://www.gnu.org/licenses
+ *
+ * Please visit http://www.xyratex.com/contact if you need additional
+ * information or have any questions.
+ *
+ * GPL HEADER END
+ */
+
+/*
+ * Copyright 2012 Xyratex Technology Limited
+ *
+ */
+
+unsigned int crc32_pclmul_le_16(unsigned char const *buffer, size_t len,
+ unsigned int crc32) __attribute__((regparm(3)));
+
+unsigned int crc32_pclmul_le(unsigned int crc, unsigned char const *p,
+ size_t len);
+
+int crc32_pclmul_init(void);
libcfs-linux-objs += linux-crypto.o linux-crypto-crc32.o
libcfs-linux-objs += linux-crypto-adler.o
+libcfs-pclmul-obj :=
+
+ifeq ($(ARCH),x86)
+libcfs-linux-objs += linux-crypto-crc32pclmul.o
+libcfs-pclmul-obj += crc32-pclmul_asm.o
+endif
+ifeq ($(ARCH),i386)
+libcfs-linux-objs += linux-crypto-crc32pclmul.o
+libcfs-pclmul-obj += crc32-pclmul_asm.o
+endif
+ifeq ($(ARCH),x86_64)
+libcfs-linux-objs += linux-crypto-crc32pclmul.o
+libcfs-pclmul-obj += crc32-pclmul_asm.o
+endif
+
default: all
ifeq (@linux25@,no)
libcfs-all-objs := debug.o fail.o nidstrings.o lwt.o module.o tracefile.o \
watchdog.o libcfs_string.o hash.o kernel_user_comm.o \
prng.o workitem.o upcall_cache.o libcfs_cpu.o \
- libcfs_mem.o libcfs_lock.o
+ libcfs_mem.o libcfs_lock.o $(libcfs-pclmul-obj)
libcfs-objs := $(libcfs-linux-objs) $(libcfs-all-objs)
workitem.c fail.c libcfs_cpu.c libcfs_mem.c libcfs_lock.c \
posix/rbtree.c user-crypto.c posix/posix-crc32.c \
posix/posix-adler.c
+
+if ARCH_x86
+libcfs_a_SOURCES += user-crc32pclmul.c crc32-pclmul_asm.S
+endif
+
libcfs_a_CPPFLAGS = $(LLCPPFLAGS)
libcfs_a_CFLAGS = $(LLCFLAGS)
endif
--- /dev/null
+/* GPL HEADER START
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; If not, see http://www.gnu.org/licenses
+ *
+ * Please visit http://www.xyratex.com/contact if you need additional
+ * information or have any questions.
+ *
+ * GPL HEADER END
+ */
+
+/*
+ * Copyright 2012 Xyratex Technology Limited
+ *
+ * Using hardware provided PCLMULQDQ instruction to accelerate the CRC32
+ * calculation.
+ * CRC32 polynomial:0x04c11db7(BE)/0xEDB88320(LE)
+ * PCLMULQDQ is a new instruction in Intel SSE4.2, the reference can be found
+ * at:
+ * http://www.intel.com/products/processor/manuals/
+ * Intel(R) 64 and IA-32 Architectures Software Developer's Manual
+ * Volume 2B: Instruction Set Reference, N-Z
+ *
+ * Authors: Gregory Prestas <Gregory_Prestas@us.xyratex.com>
+ * Alexander Boyko <Alexander_Boyko@xyratex.com>
+ */
+
+/* gcc 4.1.2 does not support pclmulqdq instruction
+ * Use macro defenition from linux kernel 2.6.38 */
+
+#define REG_NUM_INVALID 100
+ .macro XMM_NUM opd xmm
+ \opd = REG_NUM_INVALID
+ .ifc \xmm,%xmm0
+ \opd = 0
+ .endif
+ .ifc \xmm,%xmm1
+ \opd = 1
+ .endif
+ .ifc \xmm,%xmm2
+ \opd = 2
+ .endif
+ .ifc \xmm,%xmm3
+ \opd = 3
+ .endif
+ .ifc \xmm,%xmm4
+ \opd = 4
+ .endif
+ .ifc \xmm,%xmm5
+ \opd = 5
+ .endif
+ .ifc \xmm,%xmm6
+ \opd = 6
+ .endif
+ .ifc \xmm,%xmm7
+ \opd = 7
+ .endif
+ .ifc \xmm,%xmm8
+ \opd = 8
+ .endif
+ .ifc \xmm,%xmm9
+ \opd = 9
+ .endif
+ .ifc \xmm,%xmm10
+ \opd = 10
+ .endif
+ .ifc \xmm,%xmm11
+ \opd = 11
+ .endif
+ .ifc \xmm,%xmm12
+ \opd = 12
+ .endif
+ .ifc \xmm,%xmm13
+ \opd = 13
+ .endif
+ .ifc \xmm,%xmm14
+ \opd = 14
+ .endif
+ .ifc \xmm,%xmm15
+ \opd = 15
+ .endif
+ .endm
+
+ .macro PFX_OPD_SIZE
+ .byte 0x66
+ .endm
+
+ .macro PFX_REX opd1 opd2 W=0
+ .if ((\opd1 | \opd2) & 8) || \W
+ .byte 0x40 | ((\opd1 & 8) >> 3) | ((\opd2 & 8) >> 1) | (\W << 3)
+ .endif
+ .endm
+
+ .macro MODRM mod opd1 opd2
+ .byte \mod | (\opd1 & 7) | ((\opd2 & 7) << 3)
+ .endm
+
+ .macro PCLMULQDQ imm8 xmm1 xmm2
+ XMM_NUM clmul_opd1 \xmm1
+ XMM_NUM clmul_opd2 \xmm2
+ PFX_OPD_SIZE
+ PFX_REX clmul_opd1 clmul_opd2
+ .byte 0x0f, 0x3a, 0x44
+ MODRM 0xc0 clmul_opd1 clmul_opd2
+ .byte \imm8
+ .endm
+
+
+.align 16
+/*
+ * [x4*128+32 mod P(x) << 32)]' << 1 = 0x154442bd4
+ * #define CONSTANT_R1 0x154442bd4LL
+ *
+ * [(x4*128-32 mod P(x) << 32)]' << 1 = 0x1c6e41596
+ * #define CONSTANT_R2 0x1c6e41596LL
+ */
+.Lconstant_R2R1:
+ .octa 0x00000001c6e415960000000154442bd4
+/*
+ * [(x128+32 mod P(x) << 32)]' << 1 = 0x1751997d0
+ * #define CONSTANT_R3 0x1751997d0LL
+ *
+ * [(x128-32 mod P(x) << 32)]' << 1 = 0x0ccaa009e
+ * #define CONSTANT_R4 0x0ccaa009eLL
+ */
+.Lconstant_R4R3:
+ .octa 0x00000000ccaa009e00000001751997d0
+/*
+ * [(x64 mod P(x) << 32)]' << 1 = 0x163cd6124
+ * #define CONSTANT_R5 0x163cd6124LL
+ */
+.Lconstant_R5:
+ .octa 0x00000000000000000000000163cd6124
+.Lconstant_mask32:
+ .octa 0x000000000000000000000000FFFFFFFF
+/*
+ * #define CRCPOLY_TRUE_LE_FULL 0x1DB710641LL
+ *
+ * Barrett Reduction constant (u64`) = u` = (x**64 / P(x))` = 0x1F7011641LL
+ * #define CONSTANT_RU 0x1F7011641LL
+ */
+.Lconstant_RUpoly:
+ .octa 0x00000001F701164100000001DB710641
+
+#define CONSTANT %xmm0
+
+#ifdef __x86_64__
+#define BUF %rdi
+#define LEN %rsi
+#define CRC %edx
+#else
+#warning Using 32bit code support
+#define BUF %eax
+#define LEN %edx
+#define CRC %ecx
+#endif
+
+
+
+.text
+/**
+ * Calculate crc32
+ * BUF - buffer (16 bytes aligned)
+ * LEN - sizeof buffer (16 bytes aligned), LEN should be grater than 63
+ * CRC - initial crc32
+ * return %eax crc32
+ * uint crc32_pclmul_le_16(unsigned char const *buffer,
+ * size_t len, uint crc32)
+ */
+.globl crc32_pclmul_le_16
+.align 4, 0x90
+crc32_pclmul_le_16:/* buffer and buffer size are 16 bytes aligned */
+ movdqa (BUF), %xmm1
+ movdqa 0x10(BUF), %xmm2
+ movdqa 0x20(BUF), %xmm3
+ movdqa 0x30(BUF), %xmm4
+ movd CRC, CONSTANT
+ pxor CONSTANT, %xmm1
+ sub $0x40, LEN
+ add $0x40, BUF
+#ifndef __x86_64__
+ /* This is for position independed code(-fPIC) support for 32bit */
+ call delta
+delta:
+ pop %ecx
+#endif
+ cmp $0x40, LEN
+ jb less_64
+
+#ifdef __x86_64__
+ movdqa .Lconstant_R2R1(%rip), CONSTANT
+#else
+ movdqa .Lconstant_R2R1 - delta(%ecx), CONSTANT
+#endif
+
+loop_64:/* 64 bytes Full cache line folding */
+ prefetchnta 0x40(BUF)
+ movdqa %xmm1, %xmm5
+ movdqa %xmm2, %xmm6
+ movdqa %xmm3, %xmm7
+#ifdef __x86_64__
+ movdqa %xmm4, %xmm8
+#endif
+ PCLMULQDQ 00, CONSTANT, %xmm1
+ PCLMULQDQ 00, CONSTANT, %xmm2
+ PCLMULQDQ 00, CONSTANT, %xmm3
+#ifdef __x86_64__
+ PCLMULQDQ 00, CONSTANT, %xmm4
+#endif
+ PCLMULQDQ 0x11, CONSTANT, %xmm5
+ PCLMULQDQ 0x11, CONSTANT, %xmm6
+ PCLMULQDQ 0x11, CONSTANT, %xmm7
+#ifdef __x86_64__
+ PCLMULQDQ 0x11, CONSTANT, %xmm8
+#endif
+ pxor %xmm5, %xmm1
+ pxor %xmm6, %xmm2
+ pxor %xmm7, %xmm3
+#ifdef __x86_64__
+ pxor %xmm8, %xmm4
+#else
+ /* xmm8 unsupported for x32 */
+ movdqa %xmm4, %xmm5
+ PCLMULQDQ 00, CONSTANT, %xmm4
+ PCLMULQDQ 0x11, CONSTANT, %xmm5
+ pxor %xmm5, %xmm4
+#endif
+
+ pxor (BUF), %xmm1
+ pxor 0x10(BUF), %xmm2
+ pxor 0x20(BUF), %xmm3
+ pxor 0x30(BUF), %xmm4
+
+ sub $0x40, LEN
+ add $0x40, BUF
+ cmp $0x40, LEN
+ jge loop_64
+less_64:/* Folding cache line into 128bit */
+#ifdef __x86_64__
+ movdqa .Lconstant_R4R3(%rip), CONSTANT
+#else
+ movdqa .Lconstant_R4R3 - delta(%ecx), CONSTANT
+#endif
+ prefetchnta (BUF)
+
+ movdqa %xmm1, %xmm5
+ PCLMULQDQ 0x00, CONSTANT, %xmm1
+ PCLMULQDQ 0x11, CONSTANT, %xmm5
+ pxor %xmm5, %xmm1
+ pxor %xmm2, %xmm1
+
+ movdqa %xmm1, %xmm5
+ PCLMULQDQ 0x00, CONSTANT, %xmm1
+ PCLMULQDQ 0x11, CONSTANT, %xmm5
+ pxor %xmm5, %xmm1
+ pxor %xmm3, %xmm1
+
+ movdqa %xmm1, %xmm5
+ PCLMULQDQ 0x00, CONSTANT, %xmm1
+ PCLMULQDQ 0x11, CONSTANT, %xmm5
+ pxor %xmm5, %xmm1
+ pxor %xmm4, %xmm1
+
+ cmp $0x10, LEN
+ jb fold_64
+loop_16:/* Folding rest buffer into 128bit */
+ movdqa %xmm1, %xmm5
+ PCLMULQDQ 0x00, CONSTANT, %xmm1
+ PCLMULQDQ 0x11, CONSTANT, %xmm5
+ pxor %xmm5, %xmm1
+ pxor (BUF), %xmm1
+ sub $0x10, LEN
+ add $0x10, BUF
+ cmp $0x10, LEN
+ jge loop_16
+
+fold_64:
+ /* perform the last 64 bit fold, also adds 32 zeroes
+ * to the input stream */
+ PCLMULQDQ 0x01, %xmm1, CONSTANT /* R4 * xmm1.low */
+ psrldq $0x08, %xmm1
+ pxor CONSTANT, %xmm1
+
+ /* final 32-bit fold */
+ movdqa %xmm1, %xmm2
+#ifdef __x86_64__
+ movdqa .Lconstant_R5(%rip), CONSTANT
+ movdqa .Lconstant_mask32(%rip), %xmm3
+#else
+ movdqa .Lconstant_R5 - delta(%ecx), CONSTANT
+ movdqa .Lconstant_mask32 - delta(%ecx), %xmm3
+#endif
+ psrldq $0x04, %xmm2
+ pand %xmm3, %xmm1
+ PCLMULQDQ 0x00, CONSTANT, %xmm1
+ pxor %xmm2, %xmm1
+
+ /* Finish up with the bit-reversed barrett reduction 64 ==> 32 bits */
+#ifdef __x86_64__
+ movdqa .Lconstant_RUpoly(%rip), CONSTANT
+#else
+ movdqa .Lconstant_RUpoly - delta(%ecx), CONSTANT
+#endif
+ movdqa %xmm1, %xmm2
+ pand %xmm3, %xmm1
+ PCLMULQDQ 0x10, CONSTANT, %xmm1
+ pand %xmm3, %xmm1
+ PCLMULQDQ 0x00, CONSTANT, %xmm1
+ pxor %xmm2, %xmm1
+ pextrd $0x01, %xmm1, %eax
+
+ ret
EXTRA_DIST := linux-debug.c linux-lwt.c linux-prim.c linux-tracefile.c \
linux-fs.c linux-mem.c linux-proc.c linux-utils.c linux-lock.c \
linux-module.c linux-sync.c linux-curproc.c linux-tcpip.c \
- linux-cpu.c linux-crypto.c linux-crypto-crc32.c linux-crypto-adler.c
+ linux-cpu.c linux-crypto.c linux-crypto-crc32.c linux-crypto-adler.c \
+ linux-crypto-crc32pclmul.c
--- /dev/null
+/* GPL HEADER START
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; If not, see http://www.gnu.org/licenses
+ *
+ * Please visit http://www.xyratex.com/contact if you need additional
+ * information or have any questions.
+ *
+ * GPL HEADER END
+ */
+
+/*
+ * Copyright 2012 Xyratex Technology Limited
+ *
+ * Wrappers for kernel crypto shash api to pclmulqdq crc32 imlementation.
+ *
+ * Author: Alexander Boyko <Alexander_Boyko@xyratex.com>
+ */
+#include <linux/crc32.h>
+#ifdef HAVE_STRUCT_SHASH_ALG
+#include <crypto/internal/hash.h>
+#else
+#include <linux/crypto.h>
+#endif
+#include <linux/crc32.h>
+#include <asm/cpufeature.h>
+#include <asm/i387.h>
+#include <libcfs/libcfs.h>
+
+#define CHKSUM_BLOCK_SIZE 1
+#define CHKSUM_DIGEST_SIZE 4
+
+#define PCLMUL_MIN_LEN 64L /* minimum size of buffer
+ * for crc32_pclmul_le_16 */
+#define SCALE_F 16L /* size of xmm register */
+#define SCALE_F_MASK (SCALE_F - 1)
+
+u32 crc32_pclmul_le_16(unsigned char const *buffer, size_t len, u32 crc32);
+
+static u32 __attribute__((pure))
+ crc32_pclmul_le(u32 crc, unsigned char const *p, size_t len)
+{
+ unsigned int iquotient;
+ unsigned int iremainder;
+ unsigned int prealign;
+
+ if (len < PCLMUL_MIN_LEN + SCALE_F_MASK)
+ return crc32_le(crc, p, len);
+
+ if ((long)p & SCALE_F_MASK) {
+ /* align p to 16 byte */
+ prealign = SCALE_F - ((long)p & SCALE_F_MASK);
+
+ crc = crc32_le(crc, p, prealign);
+ len -= prealign;
+ p = (unsigned char *)(((unsigned long)p + SCALE_F_MASK) &
+ ~SCALE_F_MASK);
+ }
+ iquotient = len & (~SCALE_F_MASK);
+ iremainder = len & SCALE_F_MASK;
+
+ kernel_fpu_begin();
+ crc = crc32_pclmul_le_16(p, iquotient, crc);
+ kernel_fpu_end();
+
+ if (iremainder)
+ crc = crc32_le(crc, p + iquotient, iremainder);
+
+ return crc;
+}
+
+static int crc32_pclmul_cra_init(struct crypto_tfm *tfm)
+{
+ u32 *key = crypto_tfm_ctx(tfm);
+
+ *key = 0;
+
+ return 0;
+}
+
+#ifdef HAVE_STRUCT_SHASH_ALG
+/*
+ * Setting the seed allows arbitrary accumulators and flexible XOR policy
+ * If your algorithm starts with ~0, then XOR with ~0 before you set
+ * the seed.
+ */
+static int crc32_pclmul_setkey(struct crypto_shash *hash, const u8 *key,
+ unsigned int keylen)
+{
+ u32 *mctx = crypto_shash_ctx(hash);
+
+ if (keylen != sizeof(u32)) {
+ crypto_shash_set_flags(hash, CRYPTO_TFM_RES_BAD_KEY_LEN);
+ return -EINVAL;
+ }
+ *mctx = le32_to_cpup((__le32 *)key);
+ return 0;
+}
+
+static int crc32_pclmul_init(struct shash_desc *desc)
+{
+ u32 *mctx = crypto_shash_ctx(desc->tfm);
+ u32 *crcp = shash_desc_ctx(desc);
+
+ *crcp = *mctx;
+
+ return 0;
+}
+
+static int crc32_pclmul_update(struct shash_desc *desc, const u8 *data,
+ unsigned int len)
+{
+ u32 *crcp = shash_desc_ctx(desc);
+
+ *crcp = crc32_pclmul_le(*crcp, data, len);
+ return 0;
+}
+
+/* No final XOR 0xFFFFFFFF, like crc32_le */
+static int __crc32_pclmul_finup(u32 *crcp, const u8 *data, unsigned int len,
+ u8 *out)
+{
+ *(__le32 *)out = cpu_to_le32(crc32_pclmul_le(*crcp, data, len));
+ return 0;
+}
+
+static int crc32_pclmul_finup(struct shash_desc *desc, const u8 *data,
+ unsigned int len, u8 *out)
+{
+ return __crc32_pclmul_finup(shash_desc_ctx(desc), data, len, out);
+}
+
+static int crc32_pclmul_final(struct shash_desc *desc, u8 *out)
+{
+ u32 *crcp = shash_desc_ctx(desc);
+
+ *(__le32 *)out = cpu_to_le32p(crcp);
+ return 0;
+}
+
+static int crc32_pclmul_digest(struct shash_desc *desc, const u8 *data,
+ unsigned int len, u8 *out)
+{
+ return __crc32_pclmul_finup(crypto_shash_ctx(desc->tfm), data, len,
+ out);
+}
+
+static struct shash_alg alg = {
+ .setkey = crc32_pclmul_setkey,
+ .init = crc32_pclmul_init,
+ .update = crc32_pclmul_update,
+ .final = crc32_pclmul_final,
+ .finup = crc32_pclmul_finup,
+ .digest = crc32_pclmul_digest,
+ .descsize = sizeof(u32),
+ .digestsize = CHKSUM_DIGEST_SIZE,
+ .base = {
+ .cra_name = "crc32",
+ .cra_driver_name = "crc32-pclmul",
+ .cra_priority = 200,
+ .cra_blocksize = CHKSUM_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(u32),
+ .cra_module = THIS_MODULE,
+ .cra_init = crc32_pclmul_cra_init,
+ }
+};
+#else /* HAVE_STRUCT_SHASH_ALG */
+#ifdef HAVE_DIGEST_SETKEY_FLAGS
+static int crc32_digest_setkey(struct crypto_tfm *tfm, const u8 *key,
+ unsigned int keylen, unsigned int *flags)
+#else
+static int crc32_digest_setkey(struct crypto_tfm *tfm, const u8 *key,
+ unsigned int keylen)
+#endif
+{
+ u32 *mctx = crypto_tfm_ctx(tfm);
+
+ if (keylen != sizeof(u32)) {
+ tfm->crt_flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
+ return -EINVAL;
+ }
+ *mctx = le32_to_cpup((__le32 *)key);
+ return 0;
+}
+
+static void crc32_digest_init(struct crypto_tfm *tfm)
+{
+ u32 *mctx = crypto_tfm_ctx(tfm);
+
+ *mctx = 0;
+}
+
+static void crc32_digest_update(struct crypto_tfm *tfm, const u8 *data,
+ unsigned int len)
+{
+ u32 *crcp = crypto_tfm_ctx(tfm);
+
+ *crcp = crc32_pclmul_le(*crcp, data, len);
+}
+
+static void crc32_digest_final(struct crypto_tfm *tfm, u8 *out)
+{
+ u32 *crcp = crypto_tfm_ctx(tfm);
+
+ *(__le32 *)out = cpu_to_le32p(crcp);
+}
+
+static struct crypto_alg alg = {
+ .cra_name = "crc32",
+ .cra_flags = CRYPTO_ALG_TYPE_DIGEST,
+ .cra_driver_name = "crc32-pclmul",
+ .cra_priority = 200,
+ .cra_blocksize = CHKSUM_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(u32),
+ .cra_module = THIS_MODULE,
+ .cra_init = crc32_pclmul_cra_init,
+ .cra_list = LIST_HEAD_INIT(alg.cra_list),
+ .cra_u = {
+ .digest = {
+ .dia_digestsize = CHKSUM_DIGEST_SIZE,
+ .dia_setkey = crc32_digest_setkey,
+ .dia_init = crc32_digest_init,
+ .dia_update = crc32_digest_update,
+ .dia_final = crc32_digest_final
+ }
+ }
+};
+#endif /* HAVE_STRUCT_SHASH_ALG */
+
+#ifndef X86_FEATURE_PCLMULQDQ
+#define X86_FEATURE_PCLMULQDQ (4 * 32 + 1) /* PCLMULQDQ instruction */
+#endif
+
+int cfs_crypto_crc32_pclmul_register(void)
+{
+
+ if (!boot_cpu_has(X86_FEATURE_PCLMULQDQ)) {
+ CDEBUG(D_INFO, "PCLMULQDQ-NI instructions are not "
+ "detected.\n");
+ return -ENODEV;
+ }
+#ifdef HAVE_STRUCT_SHASH_ALG
+ return crypto_register_shash(&alg);
+#else
+ return crypto_register_alg(&alg);
+#endif
+}
+
+void cfs_crypto_crc32_pclmul_unregister(void)
+{
+#ifdef HAVE_STRUCT_SHASH_ALG
+ crypto_unregister_shash(&alg);
+#else
+ crypto_unregister_alg(&alg);
+#endif
+}
static int crc32, adler32;
+#ifdef CONFIG_X86
+static int crc32pclmul;
+#endif
+
int cfs_crypto_register(void)
{
crc32 = cfs_crypto_crc32_register();
adler32 = cfs_crypto_adler32_register();
+#ifdef CONFIG_X86
+ crc32pclmul = cfs_crypto_crc32_pclmul_register();
+#endif
+
/* check all algorithms and do perfermance test */
cfs_crypto_test_hashes();
return 0;
cfs_crypto_crc32_unregister();
if (adler32 == 0)
cfs_crypto_adler32_unregister();
+
+#ifdef CONFIG_X86
+ if (crc32pclmul == 0)
+ cfs_crypto_crc32_pclmul_unregister();
+#endif
+
return;
}
--- /dev/null
+/* GPL HEADER START
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; If not, see http://www.gnu.org/licenses
+ *
+ * Please visit http://www.xyratex.com/contact if you need additional
+ * information or have any questions.
+ *
+ * GPL HEADER END
+ */
+
+/*
+ * Copyright 2012 Xyratex Technology Limited
+ *
+ */
+
+#include <libcfs/libcfs.h>
+#include <libcfs/posix/posix-crypto.h>
+#include <libcfs/user-crypto.h>
+
+#define CHKSUM_BLOCK_SIZE 1
+#define CHKSUM_DIGEST_SIZE 4
+
+#define PCLMUL_MIN_LEN 64L /* minimum size of buffer
+ * for crc32_pclmul_le_16 */
+#define SCALE_F 16L /* size of xmm register */
+#define SCALE_F_MASK (SCALE_F - 1)
+
+unsigned int crc32_pclmul_le(unsigned int crc, unsigned char const *p,
+ size_t len)
+{
+ unsigned int iquotient;
+ unsigned int iremainder;
+ unsigned int prealign;
+
+ if (len < PCLMUL_MIN_LEN + SCALE_F_MASK)
+ return crc32_le(crc, p, len);
+
+ if ((long)p & SCALE_F_MASK) {
+ /* align p to 16 byte */
+ prealign = SCALE_F - ((long)p & SCALE_F_MASK);
+
+ crc = crc32_le(crc, p, prealign);
+ len -= prealign;
+ p = (unsigned char *)(((unsigned long)p + SCALE_F_MASK) &
+ ~SCALE_F_MASK);
+ }
+ iquotient = len & (~SCALE_F_MASK);
+ iremainder = len & SCALE_F_MASK;
+
+ crc = crc32_pclmul_le_16(p, iquotient, crc);
+
+ if (iremainder)
+ crc = crc32_le(crc, p + iquotient, iremainder);
+
+ return crc;
+}
+#ifndef bit_PCLMUL
+#define bit_PCLMUL (1 << 1)
+#endif
+
+int crc32_pclmul_init(void)
+{
+ unsigned int eax, ebx, ecx, edx, level;
+
+ eax = ebx = ecx = edx = 0;
+ level = 1;
+ /* get cpuid */
+ __asm__ ("xchg{l}\t{%%}ebx, %1\n\t" \
+ "cpuid\n\t" \
+ "xchg{l}\t{%%}ebx, %1\n\t" \
+ : "=a" (eax), "=r" (ebx), "=c" (ecx), "=d" (edx) \
+ : "0" (level));
+
+ if (ecx & bit_PCLMUL)
+ return 1;
+
+ return -1;
+}
#include <libcfs/libcfs.h>
#include <libcfs/posix/posix-crypto.h>
+#include <libcfs/user-crypto.h>
static int cfs_crypto_hash_speeds[CFS_HASH_ALG_MAX];
return 0;
}
+#if (defined i386) || (defined __amd64__)
+static int crc32_pclmul_wrapper(void *ctx, const unsigned char *p,
+ unsigned int len)
+{
+ unsigned int cksum = *(unsigned int *)ctx;
+
+ cksum = crc32_pclmul_le(cksum, p, len);
+
+ *(unsigned int *)ctx = cksum;
+ return 0;
+}
+#endif
+
static int start_generic(void *ctx, unsigned char *key,
- unsigned int key_len)
+ unsigned int key_len)
{
const struct cfs_crypto_hash_type *type;
struct hash_desc *hd = container_of(ctx, struct hash_desc,
}
static int final_generic(void *ctx, unsigned char *hash,
- unsigned int hash_len)
+ unsigned int hash_len)
{
const struct cfs_crypto_hash_type *type;
struct hash_desc *hd = container_of(ctx, struct hash_desc,
.update = adler_wrapper,
.start = start_generic,
.final = final_generic,
- .fini = NULL} };
+ .fini = NULL},
+#if (defined i386) || (defined __amd64__)
+ {.ha_id = CFS_HASH_ALG_CRC32,
+ .ha_ctx_size = sizeof(unsigned int),
+ .ha_priority = 100,
+ .init = crc32_pclmul_init,
+ .update = crc32_pclmul_wrapper,
+ .start = start_generic,
+ .final = final_generic,
+ .fini = NULL},
+#endif
+ };
/**
* Go through hashes to find the hash with max priority
git://git.whamcloud.com / fs / lustre-release.git / commitdiff