[PATCH] s390: in-kernel crypto rename

Replace all references to z990 by s390 in the in-kernel crypto files in
arch/s390/crypto.  The code is not specific to a particular machine (z990) but
to the s390 platform.  Big diff, does nothing..

Signed-off-by: Jan Glauber <jan.glauber@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 383 insertions, 0 deletions

diff --git a/arch/s390/crypto/crypt_s390.h b/arch/s390/crypto/crypt_s390.h
new file mode 100644
index 0000000..4d24f66
--- /dev/null
+++ b/arch/s390/crypto/crypt_s390.h
@@ -0,0 +1,383 @@
+/*
+ * Cryptographic API.
+ *
+ * Support for s390 cryptographic instructions.
+ *
+ *   Copyright (C) 2003 IBM Deutschland GmbH, IBM Corporation
+ *   Author(s): Thomas Spatzier (tspat@de.ibm.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; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ */
+#ifndef _CRYPTO_ARCH_S390_CRYPT_S390_H
+#define _CRYPTO_ARCH_S390_CRYPT_S390_H
+
+#include <asm/errno.h>
+
+#define CRYPT_S390_OP_MASK 0xFF00
+#define CRYPT_S390_FUNC_MASK 0x00FF
+
+/* s930 cryptographic operations */
+enum crypt_s390_operations {
+	CRYPT_S390_KM   = 0x0100,
+	CRYPT_S390_KMC  = 0x0200,
+	CRYPT_S390_KIMD = 0x0300,
+	CRYPT_S390_KLMD = 0x0400,
+	CRYPT_S390_KMAC = 0x0500
+};
+
+/* function codes for KM (CIPHER MESSAGE) instruction
+ * 0x80 is the decipher modifier bit
+ */
+enum crypt_s390_km_func {
+	KM_QUERY            = CRYPT_S390_KM | 0,
+	KM_DEA_ENCRYPT      = CRYPT_S390_KM | 1,
+	KM_DEA_DECRYPT      = CRYPT_S390_KM | 1 | 0x80,
+	KM_TDEA_128_ENCRYPT = CRYPT_S390_KM | 2,
+	KM_TDEA_128_DECRYPT = CRYPT_S390_KM | 2 | 0x80,
+	KM_TDEA_192_ENCRYPT = CRYPT_S390_KM | 3,
+	KM_TDEA_192_DECRYPT = CRYPT_S390_KM | 3 | 0x80,
+};
+
+/* function codes for KMC (CIPHER MESSAGE WITH CHAINING)
+ * instruction
+ */
+enum crypt_s390_kmc_func {
+	KMC_QUERY            = CRYPT_S390_KMC | 0,
+	KMC_DEA_ENCRYPT      = CRYPT_S390_KMC | 1,
+	KMC_DEA_DECRYPT      = CRYPT_S390_KMC | 1 | 0x80,
+	KMC_TDEA_128_ENCRYPT = CRYPT_S390_KMC | 2,
+	KMC_TDEA_128_DECRYPT = CRYPT_S390_KMC | 2 | 0x80,
+	KMC_TDEA_192_ENCRYPT = CRYPT_S390_KMC | 3,
+	KMC_TDEA_192_DECRYPT = CRYPT_S390_KMC | 3 | 0x80,
+};
+
+/* function codes for KIMD (COMPUTE INTERMEDIATE MESSAGE DIGEST)
+ * instruction
+ */
+enum crypt_s390_kimd_func {
+	KIMD_QUERY   = CRYPT_S390_KIMD | 0,
+	KIMD_SHA_1   = CRYPT_S390_KIMD | 1,
+};
+
+/* function codes for KLMD (COMPUTE LAST MESSAGE DIGEST)
+ * instruction
+ */
+enum crypt_s390_klmd_func {
+	KLMD_QUERY   = CRYPT_S390_KLMD | 0,
+	KLMD_SHA_1   = CRYPT_S390_KLMD | 1,
+};
+
+/* function codes for KMAC (COMPUTE MESSAGE AUTHENTICATION CODE)
+ * instruction
+ */
+enum crypt_s390_kmac_func {
+	KMAC_QUERY    = CRYPT_S390_KMAC | 0,
+	KMAC_DEA      = CRYPT_S390_KMAC | 1,
+	KMAC_TDEA_128 = CRYPT_S390_KMAC | 2,
+	KMAC_TDEA_192 = CRYPT_S390_KMAC | 3
+};
+
+/* status word for s390 crypto instructions' QUERY functions */
+struct crypt_s390_query_status {
+	u64 high;
+	u64 low;
+};
+
+/*
+ * Standard fixup and ex_table sections for crypt_s390 inline functions.
+ * label 0: the s390 crypto operation
+ * label 1: just after 1 to catch illegal operation exception
+ *          (unsupported model)
+ * label 6: the return point after fixup
+ * label 7: set error value if exception _in_ crypto operation
+ * label 8: set error value if illegal operation exception
+ * [ret] is the variable to receive the error code
+ * [ERR] is the error code value
+ */
+#ifndef __s390x__
+#define __crypt_s390_fixup \
+	".section .fixup,\"ax\" \n"	\
+	"7:	lhi	%0,%h[e1] \n"	\
+	"	bras	1,9f \n"	\
+	"	.long	6b \n"		\
+	"8:	lhi	%0,%h[e2] \n"	\
+	"	bras	1,9f \n"	\
+	"	.long	6b \n"		\
+	"9:	l	1,0(1) \n"	\
+	"	br	1 \n"		\
+	".previous \n"			\
+	".section __ex_table,\"a\" \n"	\
+	"	.align	4 \n"		\
+	"	.long	0b,7b \n"	\
+	"	.long	1b,8b \n"	\
+	".previous"
+#else /* __s390x__ */
+#define __crypt_s390_fixup \
+	".section .fixup,\"ax\" \n"	\
+	"7:	lhi	%0,%h[e1] \n"	\
+	"	jg	6b \n"		\
+	"8:	lhi	%0,%h[e2] \n"	\
+	"	jg	6b \n"		\
+	".previous\n"			\
+	".section __ex_table,\"a\" \n"	\
+	"	.align	8 \n"		\
+	"	.quad	0b,7b \n"	\
+	"	.quad	1b,8b \n"	\
+	".previous"
+#endif /* __s390x__ */
+
+/*
+ * Standard code for setting the result of s390 crypto instructions.
+ * %0: the register which will receive the result
+ * [result]: the register containing the result (e.g. second operand length
+ * to compute number of processed bytes].
+ */
+#ifndef __s390x__
+#define __crypt_s390_set_result \
+	"	lr	%0,%[result] \n"
+#else /* __s390x__ */
+#define __crypt_s390_set_result \
+	"	lgr	%0,%[result] \n"
+#endif
+
+/*
+ * Executes the KM (CIPHER MESSAGE) operation of the CPU.
+ * @param func: the function code passed to KM; see crypt_s390_km_func
+ * @param param: address of parameter block; see POP for details on each func
+ * @param dest: address of destination memory area
+ * @param src: address of source memory area
+ * @param src_len: length of src operand in bytes
+ * @returns < zero for failure, 0 for the query func, number of processed bytes
+ * 	for encryption/decryption funcs
+ */
+static inline int
+crypt_s390_km(long func, void* param, u8* dest, const u8* src, long src_len)
+{
+	register long __func asm("0") = func & CRYPT_S390_FUNC_MASK;
+	register void* __param asm("1") = param;
+	register u8* __dest asm("4") = dest;
+	register const u8* __src asm("2") = src;
+	register long __src_len asm("3") = src_len;
+	int ret;
+
+	ret = 0;
+	__asm__ __volatile__ (
+		"0:	.insn	rre,0xB92E0000,%1,%2 \n" /* KM opcode */
+		"1:	brc	1,0b \n" /* handle partial completion */
+		__crypt_s390_set_result
+		"6:	\n"
+		__crypt_s390_fixup
+		: "+d" (ret), "+a" (__dest), "+a" (__src),
+		  [result] "+d" (__src_len)
+		: [e1] "K" (-EFAULT), [e2] "K" (-ENOSYS), "d" (__func),
+		  "a" (__param)
+		: "cc", "memory"
+	);
+	if (ret >= 0 && func & CRYPT_S390_FUNC_MASK){
+		ret = src_len - ret;
+	}
+	return ret;
+}
+
+/*
+ * Executes the KMC (CIPHER MESSAGE WITH CHAINING) operation of the CPU.
+ * @param func: the function code passed to KM; see crypt_s390_kmc_func
+ * @param param: address of parameter block; see POP for details on each func
+ * @param dest: address of destination memory area
+ * @param src: address of source memory area
+ * @param src_len: length of src operand in bytes
+ * @returns < zero for failure, 0 for the query func, number of processed bytes
+ * 	for encryption/decryption funcs
+ */
+static inline int
+crypt_s390_kmc(long func, void* param, u8* dest, const u8* src, long src_len)
+{
+	register long __func asm("0") = func & CRYPT_S390_FUNC_MASK;
+	register void* __param asm("1") = param;
+	register u8* __dest asm("4") = dest;
+	register const u8* __src asm("2") = src;
+	register long __src_len asm("3") = src_len;
+	int ret;
+
+	ret = 0;
+	__asm__ __volatile__ (
+		"0:	.insn	rre,0xB92F0000,%1,%2 \n" /* KMC opcode */
+		"1:	brc	1,0b \n" /* handle partial completion */
+		__crypt_s390_set_result
+		"6:	\n"
+		__crypt_s390_fixup
+		: "+d" (ret), "+a" (__dest), "+a" (__src),
+		  [result] "+d" (__src_len)
+		: [e1] "K" (-EFAULT), [e2] "K" (-ENOSYS), "d" (__func),
+		  "a" (__param)
+		: "cc", "memory"
+	);
+	if (ret >= 0 && func & CRYPT_S390_FUNC_MASK){
+		ret = src_len - ret;
+	}
+	return ret;
+}
+
+/*
+ * Executes the KIMD (COMPUTE INTERMEDIATE MESSAGE DIGEST) operation
+ * of the CPU.
+ * @param func: the function code passed to KM; see crypt_s390_kimd_func
+ * @param param: address of parameter block; see POP for details on each func
+ * @param src: address of source memory area
+ * @param src_len: length of src operand in bytes
+ * @returns < zero for failure, 0 for the query func, number of processed bytes
+ * 	for digest funcs
+ */
+static inline int
+crypt_s390_kimd(long func, void* param, const u8* src, long src_len)
+{
+	register long __func asm("0") = func & CRYPT_S390_FUNC_MASK;
+	register void* __param asm("1") = param;
+	register const u8* __src asm("2") = src;
+	register long __src_len asm("3") = src_len;
+	int ret;
+
+	ret = 0;
+	__asm__ __volatile__ (
+		"0:	.insn	rre,0xB93E0000,%1,%1 \n" /* KIMD opcode */
+		"1:	brc	1,0b \n" /* handle partical completion */
+		__crypt_s390_set_result
+		"6:	\n"
+		__crypt_s390_fixup
+		: "+d" (ret), "+a" (__src), [result] "+d" (__src_len)
+		: [e1] "K" (-EFAULT), [e2] "K" (-ENOSYS), "d" (__func),
+		  "a" (__param)
+		: "cc", "memory"
+	);
+	if (ret >= 0 && (func & CRYPT_S390_FUNC_MASK)){
+		ret = src_len - ret;
+	}
+	return ret;
+}
+
+/*
+ * Executes the KLMD (COMPUTE LAST MESSAGE DIGEST) operation of the CPU.
+ * @param func: the function code passed to KM; see crypt_s390_klmd_func
+ * @param param: address of parameter block; see POP for details on each func
+ * @param src: address of source memory area
+ * @param src_len: length of src operand in bytes
+ * @returns < zero for failure, 0 for the query func, number of processed bytes
+ * 	for digest funcs
+ */
+static inline int
+crypt_s390_klmd(long func, void* param, const u8* src, long src_len)
+{
+	register long __func asm("0") = func & CRYPT_S390_FUNC_MASK;
+	register void* __param asm("1") = param;
+	register const u8* __src asm("2") = src;
+	register long __src_len asm("3") = src_len;
+	int ret;
+
+	ret = 0;
+	__asm__ __volatile__ (
+		"0:	.insn	rre,0xB93F0000,%1,%1 \n" /* KLMD opcode */
+		"1:	brc	1,0b \n" /* handle partical completion */
+		__crypt_s390_set_result
+		"6:	\n"
+		__crypt_s390_fixup
+		: "+d" (ret), "+a" (__src), [result] "+d" (__src_len)
+		: [e1] "K" (-EFAULT), [e2] "K" (-ENOSYS), "d" (__func),
+		  "a" (__param)
+		: "cc", "memory"
+	);
+	if (ret >= 0 && func & CRYPT_S390_FUNC_MASK){
+		ret = src_len - ret;
+	}
+	return ret;
+}
+
+/*
+ * Executes the KMAC (COMPUTE MESSAGE AUTHENTICATION CODE) operation
+ * of the CPU.
+ * @param func: the function code passed to KM; see crypt_s390_klmd_func
+ * @param param: address of parameter block; see POP for details on each func
+ * @param src: address of source memory area
+ * @param src_len: length of src operand in bytes
+ * @returns < zero for failure, 0 for the query func, number of processed bytes
+ * 	for digest funcs
+ */
+static inline int
+crypt_s390_kmac(long func, void* param, const u8* src, long src_len)
+{
+	register long __func asm("0") = func & CRYPT_S390_FUNC_MASK;
+	register void* __param asm("1") = param;
+	register const u8* __src asm("2") = src;
+	register long __src_len asm("3") = src_len;
+	int ret;
+
+	ret = 0;
+	__asm__ __volatile__ (
+		"0:	.insn	rre,0xB91E0000,%5,%5 \n" /* KMAC opcode */
+		"1:	brc	1,0b \n" /* handle partical completion */
+		__crypt_s390_set_result
+		"6:	\n"
+		__crypt_s390_fixup
+		: "+d" (ret), "+a" (__src), [result] "+d" (__src_len)
+		: [e1] "K" (-EFAULT), [e2] "K" (-ENOSYS), "d" (__func),
+		  "a" (__param)
+		: "cc", "memory"
+	);
+	if (ret >= 0 && func & CRYPT_S390_FUNC_MASK){
+		ret = src_len - ret;
+	}
+	return ret;
+}
+
+/**
+ * Tests if a specific crypto function is implemented on the machine.
+ * @param func:	the function code of the specific function; 0 if op in general
+ * @return	1 if func available; 0 if func or op in general not available
+ */
+static inline int
+crypt_s390_func_available(int func)
+{
+	int ret;
+
+	struct crypt_s390_query_status status = {
+		.high = 0,
+		.low = 0
+	};
+	switch (func & CRYPT_S390_OP_MASK){
+		case CRYPT_S390_KM:
+			ret = crypt_s390_km(KM_QUERY, &status, NULL, NULL, 0);
+			break;
+		case CRYPT_S390_KMC:
+			ret = crypt_s390_kmc(KMC_QUERY, &status, NULL, NULL, 0);
+			break;
+		case CRYPT_S390_KIMD:
+			ret = crypt_s390_kimd(KIMD_QUERY, &status, NULL, 0);
+			break;
+		case CRYPT_S390_KLMD:
+			ret = crypt_s390_klmd(KLMD_QUERY, &status, NULL, 0);
+			break;
+		case CRYPT_S390_KMAC:
+			ret = crypt_s390_kmac(KMAC_QUERY, &status, NULL, 0);
+			break;
+		default:
+			ret = 0;
+			return ret;
+	}
+	if (ret >= 0){
+		func &= CRYPT_S390_FUNC_MASK;
+		func &= 0x7f; //mask modifier bit
+		if (func < 64){
+			ret = (status.high >> (64 - func - 1)) & 0x1;
+		} else {
+			ret = (status.low >> (128 - func - 1)) & 0x1;
+		}
+	} else {
+		ret = 0;
+	}
+	return ret;
+}
+
+#endif // _CRYPTO_ARCH_S390_CRYPT_S390_H