[linux-2.6-block.git] / arch / s390 / crypto / crypt_s390.h

/*
 * Cryptographic API.
 *
 * Support for s390 cryptographic instructions.
 *
 *   Copyright IBM Corp. 2003,2007
 *   Author(s): Thomas Spatzier
 *		Jan Glauber (jan.glauber@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

#define CRYPT_S390_PRIORITY 300
#define CRYPT_S390_COMPOSITE_PRIORITY 400

#define CRYPT_S390_MSA	0x1
#define CRYPT_S390_MSA3	0x2
#define CRYPT_S390_MSA4	0x4

/* s390 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,
	CRYPT_S390_KMCTR = 0x0600
};

/*
 * function codes for KM (CIPHER MESSAGE) instruction
 * 0x80 is the decipher modifier bit
 */
enum crypt_s390_km_func {
	KM_QUERY	    = CRYPT_S390_KM | 0x0,
	KM_DEA_ENCRYPT      = CRYPT_S390_KM | 0x1,
	KM_DEA_DECRYPT      = CRYPT_S390_KM | 0x1 | 0x80,
	KM_TDEA_128_ENCRYPT = CRYPT_S390_KM | 0x2,
	KM_TDEA_128_DECRYPT = CRYPT_S390_KM | 0x2 | 0x80,
	KM_TDEA_192_ENCRYPT = CRYPT_S390_KM | 0x3,
	KM_TDEA_192_DECRYPT = CRYPT_S390_KM | 0x3 | 0x80,
	KM_AES_128_ENCRYPT  = CRYPT_S390_KM | 0x12,
	KM_AES_128_DECRYPT  = CRYPT_S390_KM | 0x12 | 0x80,
	KM_AES_192_ENCRYPT  = CRYPT_S390_KM | 0x13,
	KM_AES_192_DECRYPT  = CRYPT_S390_KM | 0x13 | 0x80,
	KM_AES_256_ENCRYPT  = CRYPT_S390_KM | 0x14,
	KM_AES_256_DECRYPT  = CRYPT_S390_KM | 0x14 | 0x80,
	KM_XTS_128_ENCRYPT  = CRYPT_S390_KM | 0x32,
	KM_XTS_128_DECRYPT  = CRYPT_S390_KM | 0x32 | 0x80,
	KM_XTS_256_ENCRYPT  = CRYPT_S390_KM | 0x34,
	KM_XTS_256_DECRYPT  = CRYPT_S390_KM | 0x34 | 0x80,
};

/*
 * function codes for KMC (CIPHER MESSAGE WITH CHAINING)
 * instruction
 */
enum crypt_s390_kmc_func {
	KMC_QUERY            = CRYPT_S390_KMC | 0x0,
	KMC_DEA_ENCRYPT      = CRYPT_S390_KMC | 0x1,
	KMC_DEA_DECRYPT      = CRYPT_S390_KMC | 0x1 | 0x80,
	KMC_TDEA_128_ENCRYPT = CRYPT_S390_KMC | 0x2,
	KMC_TDEA_128_DECRYPT = CRYPT_S390_KMC | 0x2 | 0x80,
	KMC_TDEA_192_ENCRYPT = CRYPT_S390_KMC | 0x3,
	KMC_TDEA_192_DECRYPT = CRYPT_S390_KMC | 0x3 | 0x80,
	KMC_AES_128_ENCRYPT  = CRYPT_S390_KMC | 0x12,
	KMC_AES_128_DECRYPT  = CRYPT_S390_KMC | 0x12 | 0x80,
	KMC_AES_192_ENCRYPT  = CRYPT_S390_KMC | 0x13,
	KMC_AES_192_DECRYPT  = CRYPT_S390_KMC | 0x13 | 0x80,
	KMC_AES_256_ENCRYPT  = CRYPT_S390_KMC | 0x14,
	KMC_AES_256_DECRYPT  = CRYPT_S390_KMC | 0x14 | 0x80,
	KMC_PRNG	     = CRYPT_S390_KMC | 0x43,
};

/*
 * function codes for KMCTR (CIPHER MESSAGE WITH COUNTER)
 * instruction
 */
enum crypt_s390_kmctr_func {
	KMCTR_QUERY            = CRYPT_S390_KMCTR | 0x0,
	KMCTR_DEA_ENCRYPT      = CRYPT_S390_KMCTR | 0x1,
	KMCTR_DEA_DECRYPT      = CRYPT_S390_KMCTR | 0x1 | 0x80,
	KMCTR_TDEA_128_ENCRYPT = CRYPT_S390_KMCTR | 0x2,
	KMCTR_TDEA_128_DECRYPT = CRYPT_S390_KMCTR | 0x2 | 0x80,
	KMCTR_TDEA_192_ENCRYPT = CRYPT_S390_KMCTR | 0x3,
	KMCTR_TDEA_192_DECRYPT = CRYPT_S390_KMCTR | 0x3 | 0x80,
	KMCTR_AES_128_ENCRYPT  = CRYPT_S390_KMCTR | 0x12,
	KMCTR_AES_128_DECRYPT  = CRYPT_S390_KMCTR | 0x12 | 0x80,
	KMCTR_AES_192_ENCRYPT  = CRYPT_S390_KMCTR | 0x13,
	KMCTR_AES_192_DECRYPT  = CRYPT_S390_KMCTR | 0x13 | 0x80,
	KMCTR_AES_256_ENCRYPT  = CRYPT_S390_KMCTR | 0x14,
	KMCTR_AES_256_DECRYPT  = CRYPT_S390_KMCTR | 0x14 | 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,
	KIMD_SHA_256 = CRYPT_S390_KIMD | 2,
	KIMD_SHA_512 = CRYPT_S390_KIMD | 3,
	KIMD_GHASH   = CRYPT_S390_KIMD | 65,
};

/*
 * 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,
	KLMD_SHA_256 = CRYPT_S390_KLMD | 2,
	KLMD_SHA_512 = CRYPT_S390_KLMD | 3,
};

/*
 * 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
};

/**
 * crypt_s390_km:
 * @func: the function code passed to KM; see crypt_s390_km_func
 * @param: address of parameter block; see POP for details on each func
 * @dest: address of destination memory area
 * @src: address of source memory area
 * @src_len: length of src operand in bytes
 *
 * Executes the KM (CIPHER MESSAGE) operation of the CPU.
 *
 * Returns -1 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 const u8 *__src asm("2") = src;
	register long __src_len asm("3") = src_len;
	register u8 *__dest asm("4") = dest;
	int ret;

	asm volatile(
		"0:	.insn	rre,0xb92e0000,%3,%1 \n" /* KM opcode */
		"1:	brc	1,0b \n" /* handle partial completion */
		"	la	%0,0\n"
		"2:\n"
		EX_TABLE(0b,2b) EX_TABLE(1b,2b)
		: "=d" (ret), "+a" (__src), "+d" (__src_len), "+a" (__dest)
		: "d" (__func), "a" (__param), "0" (-1) : "cc", "memory");
	if (ret < 0)
		return ret;
	return (func & CRYPT_S390_FUNC_MASK) ? src_len - __src_len : __src_len;
}

/**
 * crypt_s390_kmc:
 * @func: the function code passed to KM; see crypt_s390_kmc_func
 * @param: address of parameter block; see POP for details on each func
 * @dest: address of destination memory area
 * @src: address of source memory area
 * @src_len: length of src operand in bytes
 *
 * Executes the KMC (CIPHER MESSAGE WITH CHAINING) operation of the CPU.
 *
 * Returns -1 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 const u8 *__src asm("2") = src;
	register long __src_len asm("3") = src_len;
	register u8 *__dest asm("4") = dest;
	int ret;

	asm volatile(
		"0:	.insn	rre,0xb92f0000,%3,%1 \n" /* KMC opcode */
		"1:	brc	1,0b \n" /* handle partial completion */
		"	la	%0,0\n"
		"2:\n"
		EX_TABLE(0b,2b) EX_TABLE(1b,2b)
		: "=d" (ret), "+a" (__src), "+d" (__src_len), "+a" (__dest)
		: "d" (__func), "a" (__param), "0" (-1) : "cc", "memory");
	if (ret < 0)
		return ret;
	return (func & CRYPT_S390_FUNC_MASK) ? src_len - __src_len : __src_len;
}

/**
 * crypt_s390_kimd:
 * @func: the function code passed to KM; see crypt_s390_kimd_func
 * @param: address of parameter block; see POP for details on each func
 * @src: address of source memory area
 * @src_len: length of src operand in bytes
 *
 * Executes the KIMD (COMPUTE INTERMEDIATE MESSAGE DIGEST) operation
 * of the CPU.
 *
 * Returns -1 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;

	asm volatile(
		"0:	.insn	rre,0xb93e0000,%1,%1 \n" /* KIMD opcode */
		"1:	brc	1,0b \n" /* handle partial completion */
		"	la	%0,0\n"
		"2:\n"
		EX_TABLE(0b,2b) EX_TABLE(1b,2b)
		: "=d" (ret), "+a" (__src), "+d" (__src_len)
		: "d" (__func), "a" (__param), "0" (-1) : "cc", "memory");
	if (ret < 0)
		return ret;
	return (func & CRYPT_S390_FUNC_MASK) ? src_len - __src_len : __src_len;
}

/**
 * crypt_s390_klmd:
 * @func: the function code passed to KM; see crypt_s390_klmd_func
 * @param: address of parameter block; see POP for details on each func
 * @src: address of source memory area
 * @src_len: length of src operand in bytes
 *
 * Executes the KLMD (COMPUTE LAST MESSAGE DIGEST) operation of the CPU.
 *
 * Returns -1 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;

	asm volatile(
		"0:	.insn	rre,0xb93f0000,%1,%1 \n" /* KLMD opcode */
		"1:	brc	1,0b \n" /* handle partial completion */
		"	la	%0,0\n"
		"2:\n"
		EX_TABLE(0b,2b) EX_TABLE(1b,2b)
		: "=d" (ret), "+a" (__src), "+d" (__src_len)
		: "d" (__func), "a" (__param), "0" (-1) : "cc", "memory");
	if (ret < 0)
		return ret;
	return (func & CRYPT_S390_FUNC_MASK) ? src_len - __src_len : __src_len;
}

/**
 * crypt_s390_kmac:
 * @func: the function code passed to KM; see crypt_s390_klmd_func
 * @param: address of parameter block; see POP for details on each func
 * @src: address of source memory area
 * @src_len: length of src operand in bytes
 *
 * Executes the KMAC (COMPUTE MESSAGE AUTHENTICATION CODE) operation
 * of the CPU.
 *
 * Returns -1 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;

	asm volatile(
		"0:	.insn	rre,0xb91e0000,%1,%1 \n" /* KLAC opcode */
		"1:	brc	1,0b \n" /* handle partial completion */
		"	la	%0,0\n"
		"2:\n"
		EX_TABLE(0b,2b) EX_TABLE(1b,2b)
		: "=d" (ret), "+a" (__src), "+d" (__src_len)
		: "d" (__func), "a" (__param), "0" (-1) : "cc", "memory");
	if (ret < 0)
		return ret;
	return (func & CRYPT_S390_FUNC_MASK) ? src_len - __src_len : __src_len;
}

/**
 * crypt_s390_kmctr:
 * @func: the function code passed to KMCTR; see crypt_s390_kmctr_func
 * @param: address of parameter block; see POP for details on each func
 * @dest: address of destination memory area
 * @src: address of source memory area
 * @src_len: length of src operand in bytes
 * @counter: address of counter value
 *
 * Executes the KMCTR (CIPHER MESSAGE WITH COUNTER) operation of the CPU.
 *
 * Returns -1 for failure, 0 for the query func, number of processed
 * bytes for encryption/decryption funcs
 */
static inline int crypt_s390_kmctr(long func, void *param, u8 *dest,
				 const u8 *src, long src_len, u8 *counter)
{
	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;
	register u8 *__dest asm("4") = dest;
	register u8 *__ctr asm("6") = counter;
	int ret = -1;

	asm volatile(
		"0:	.insn	rrf,0xb92d0000,%3,%1,%4,0 \n" /* KMCTR opcode */
		"1:	brc	1,0b \n" /* handle partial completion */
		"	la	%0,0\n"
		"2:\n"
		EX_TABLE(0b,2b) EX_TABLE(1b,2b)
		: "+d" (ret), "+a" (__src), "+d" (__src_len), "+a" (__dest),
		  "+a" (__ctr)
		: "d" (__func), "a" (__param) : "cc", "memory");
	if (ret < 0)
		return ret;
	return (func & CRYPT_S390_FUNC_MASK) ? src_len - __src_len : __src_len;
}

/**
 * crypt_s390_func_available:
 * @func: the function code of the specific function; 0 if op in general
 *
 * Tests if a specific crypto function is implemented on the machine.
 *
 * Returns 1 if func available; 0 if func or op in general not available
 */
static inline int crypt_s390_func_available(int func,
					    unsigned int facility_mask)
{
	unsigned char status[16];
	int ret;

	if (facility_mask & CRYPT_S390_MSA && !test_facility(17))
		return 0;

	if (facility_mask & CRYPT_S390_MSA3 &&
	    (!test_facility(2) || !test_facility(76)))
		return 0;
	if (facility_mask & CRYPT_S390_MSA4 &&
	    (!test_facility(2) || !test_facility(77)))
		return 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;
	case CRYPT_S390_KMCTR:
		ret = crypt_s390_kmctr(KMCTR_QUERY, &status, NULL, NULL, 0,
				       NULL);
		break;
	default:
		return 0;
	}
	if (ret < 0)
		return 0;
	func &= CRYPT_S390_FUNC_MASK;
	func &= 0x7f;		/* mask modifier bit */
	return (status[func >> 3] & (0x80 >> (func & 7))) != 0;
}

/**
 * crypt_s390_pcc:
 * @func: the function code passed to KM; see crypt_s390_km_func
 * @param: address of parameter block; see POP for details on each func
 *
 * Executes the PCC (PERFORM CRYPTOGRAPHIC COMPUTATION) operation of the CPU.
 *
 * Returns -1 for failure, 0 for success.
 */
static inline int crypt_s390_pcc(long func, void *param)
{
	register long __func asm("0") = func & 0x7f; /* encrypt or decrypt */
	register void *__param asm("1") = param;
	int ret = -1;

	asm volatile(
		"0:	.insn	rre,0xb92c0000,0,0 \n" /* PCC opcode */
		"1:	brc	1,0b \n" /* handle partial completion */
		"	la	%0,0\n"
		"2:\n"
		EX_TABLE(0b,2b) EX_TABLE(1b,2b)
		: "+d" (ret)
		: "d" (__func), "a" (__param) : "cc", "memory");
	return ret;
}


#endif	/* _CRYPTO_ARCH_S390_CRYPT_S390_H */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Cryptographic API.
	3	*
c1e26e1e	4	* Support for s390 cryptographic instructions.
1da177e4	5	*
86aa9fc2 JG	6	* Copyright IBM Corp. 2003,2007
	7	* Author(s): Thomas Spatzier
	8	* Jan Glauber (jan.glauber@de.ibm.com)
1da177e4 LT	9	*
	10	* This program is free software; you can redistribute it and/or modify it
	11	* under the terms of the GNU General Public License as published by the Free
	12	* Software Foundation; either version 2 of the License, or (at your option)
	13	* any later version.
	14	*
	15	*/
c1e26e1e JG	16	#ifndef _CRYPTO_ARCH_S390_CRYPT_S390_H
c1e26e1e JG	17	#define _CRYPTO_ARCH_S390_CRYPT_S390_H
1da177e4 LT	18
	19	#include <asm/errno.h>
	20
c1e26e1e JG	21	#define CRYPT_S390_OP_MASK 0xFF00
c1e26e1e JG	22	#define CRYPT_S390_FUNC_MASK 0x00FF
1da177e4	23
65b75c36	24	#define CRYPT_S390_PRIORITY 300
a9e62fad	25	#define CRYPT_S390_COMPOSITE_PRIORITY 400
65b75c36	26
1822bc90 JG	27	#define CRYPT_S390_MSA 0x1
	28	#define CRYPT_S390_MSA3 0x2
	29	#define CRYPT_S390_MSA4 0x4
	30
bccdbdc9	31	/* s390 cryptographic operations */
c1e26e1e JG	32	enum crypt_s390_operations {
	33	CRYPT_S390_KM = 0x0100,
	34	CRYPT_S390_KMC = 0x0200,
	35	CRYPT_S390_KIMD = 0x0300,
	36	CRYPT_S390_KLMD = 0x0400,
0200f3ec GS	37	CRYPT_S390_KMAC = 0x0500,
0200f3ec GS	38	CRYPT_S390_KMCTR = 0x0600
1da177e4 LT	39	};
1da177e4 LT	40
86aa9fc2 JG	41	/*
86aa9fc2 JG	42	* function codes for KM (CIPHER MESSAGE) instruction
c1e26e1e JG	43	* 0x80 is the decipher modifier bit
	44	*/
	45	enum crypt_s390_km_func {
bf754ae8 JG	46	KM_QUERY = CRYPT_S390_KM \| 0x0,
	47	KM_DEA_ENCRYPT = CRYPT_S390_KM \| 0x1,
	48	KM_DEA_DECRYPT = CRYPT_S390_KM \| 0x1 \| 0x80,
	49	KM_TDEA_128_ENCRYPT = CRYPT_S390_KM \| 0x2,
	50	KM_TDEA_128_DECRYPT = CRYPT_S390_KM \| 0x2 \| 0x80,
	51	KM_TDEA_192_ENCRYPT = CRYPT_S390_KM \| 0x3,
	52	KM_TDEA_192_DECRYPT = CRYPT_S390_KM \| 0x3 \| 0x80,
	53	KM_AES_128_ENCRYPT = CRYPT_S390_KM \| 0x12,
	54	KM_AES_128_DECRYPT = CRYPT_S390_KM \| 0x12 \| 0x80,
	55	KM_AES_192_ENCRYPT = CRYPT_S390_KM \| 0x13,
	56	KM_AES_192_DECRYPT = CRYPT_S390_KM \| 0x13 \| 0x80,
	57	KM_AES_256_ENCRYPT = CRYPT_S390_KM \| 0x14,
	58	KM_AES_256_DECRYPT = CRYPT_S390_KM \| 0x14 \| 0x80,
99d97222 GS	59	KM_XTS_128_ENCRYPT = CRYPT_S390_KM \| 0x32,
	60	KM_XTS_128_DECRYPT = CRYPT_S390_KM \| 0x32 \| 0x80,
	61	KM_XTS_256_ENCRYPT = CRYPT_S390_KM \| 0x34,
	62	KM_XTS_256_DECRYPT = CRYPT_S390_KM \| 0x34 \| 0x80,
1da177e4 LT	63	};
1da177e4 LT	64
86aa9fc2 JG	65	/*
86aa9fc2 JG	66	* function codes for KMC (CIPHER MESSAGE WITH CHAINING)
c1e26e1e JG	67	* instruction
	68	*/
	69	enum crypt_s390_kmc_func {
bf754ae8 JG	70	KMC_QUERY = CRYPT_S390_KMC \| 0x0,
	71	KMC_DEA_ENCRYPT = CRYPT_S390_KMC \| 0x1,
	72	KMC_DEA_DECRYPT = CRYPT_S390_KMC \| 0x1 \| 0x80,
	73	KMC_TDEA_128_ENCRYPT = CRYPT_S390_KMC \| 0x2,
	74	KMC_TDEA_128_DECRYPT = CRYPT_S390_KMC \| 0x2 \| 0x80,
	75	KMC_TDEA_192_ENCRYPT = CRYPT_S390_KMC \| 0x3,
	76	KMC_TDEA_192_DECRYPT = CRYPT_S390_KMC \| 0x3 \| 0x80,
	77	KMC_AES_128_ENCRYPT = CRYPT_S390_KMC \| 0x12,
	78	KMC_AES_128_DECRYPT = CRYPT_S390_KMC \| 0x12 \| 0x80,
	79	KMC_AES_192_ENCRYPT = CRYPT_S390_KMC \| 0x13,
	80	KMC_AES_192_DECRYPT = CRYPT_S390_KMC \| 0x13 \| 0x80,
	81	KMC_AES_256_ENCRYPT = CRYPT_S390_KMC \| 0x14,
	82	KMC_AES_256_DECRYPT = CRYPT_S390_KMC \| 0x14 \| 0x80,
1b278294	83	KMC_PRNG = CRYPT_S390_KMC \| 0x43,
1da177e4 LT	84	};
1da177e4 LT	85
0200f3ec GS	86	/*
	87	* function codes for KMCTR (CIPHER MESSAGE WITH COUNTER)
	88	* instruction
	89	*/
	90	enum crypt_s390_kmctr_func {
	91	KMCTR_QUERY = CRYPT_S390_KMCTR \| 0x0,
	92	KMCTR_DEA_ENCRYPT = CRYPT_S390_KMCTR \| 0x1,
	93	KMCTR_DEA_DECRYPT = CRYPT_S390_KMCTR \| 0x1 \| 0x80,
	94	KMCTR_TDEA_128_ENCRYPT = CRYPT_S390_KMCTR \| 0x2,
	95	KMCTR_TDEA_128_DECRYPT = CRYPT_S390_KMCTR \| 0x2 \| 0x80,
	96	KMCTR_TDEA_192_ENCRYPT = CRYPT_S390_KMCTR \| 0x3,
	97	KMCTR_TDEA_192_DECRYPT = CRYPT_S390_KMCTR \| 0x3 \| 0x80,
	98	KMCTR_AES_128_ENCRYPT = CRYPT_S390_KMCTR \| 0x12,
	99	KMCTR_AES_128_DECRYPT = CRYPT_S390_KMCTR \| 0x12 \| 0x80,
	100	KMCTR_AES_192_ENCRYPT = CRYPT_S390_KMCTR \| 0x13,
	101	KMCTR_AES_192_DECRYPT = CRYPT_S390_KMCTR \| 0x13 \| 0x80,
	102	KMCTR_AES_256_ENCRYPT = CRYPT_S390_KMCTR \| 0x14,
	103	KMCTR_AES_256_DECRYPT = CRYPT_S390_KMCTR \| 0x14 \| 0x80,
	104	};
	105
86aa9fc2 JG	106	/*
86aa9fc2 JG	107	* function codes for KIMD (COMPUTE INTERMEDIATE MESSAGE DIGEST)
c1e26e1e JG	108	* instruction
	109	*/
	110	enum crypt_s390_kimd_func {
	111	KIMD_QUERY = CRYPT_S390_KIMD \| 0,
	112	KIMD_SHA_1 = CRYPT_S390_KIMD \| 1,
0a497c17	113	KIMD_SHA_256 = CRYPT_S390_KIMD \| 2,
291dc7c0	114	KIMD_SHA_512 = CRYPT_S390_KIMD \| 3,
df1309ce	115	KIMD_GHASH = CRYPT_S390_KIMD \| 65,
1da177e4 LT	116	};
1da177e4 LT	117
86aa9fc2 JG	118	/*
86aa9fc2 JG	119	* function codes for KLMD (COMPUTE LAST MESSAGE DIGEST)
c1e26e1e JG	120	* instruction
	121	*/
	122	enum crypt_s390_klmd_func {
	123	KLMD_QUERY = CRYPT_S390_KLMD \| 0,
	124	KLMD_SHA_1 = CRYPT_S390_KLMD \| 1,
0a497c17	125	KLMD_SHA_256 = CRYPT_S390_KLMD \| 2,
291dc7c0	126	KLMD_SHA_512 = CRYPT_S390_KLMD \| 3,
1da177e4 LT	127	};
1da177e4 LT	128
86aa9fc2 JG	129	/*
86aa9fc2 JG	130	* function codes for KMAC (COMPUTE MESSAGE AUTHENTICATION CODE)
c1e26e1e JG	131	* instruction
	132	*/
	133	enum crypt_s390_kmac_func {
	134	KMAC_QUERY = CRYPT_S390_KMAC \| 0,
	135	KMAC_DEA = CRYPT_S390_KMAC \| 1,
	136	KMAC_TDEA_128 = CRYPT_S390_KMAC \| 2,
	137	KMAC_TDEA_192 = CRYPT_S390_KMAC \| 3
1da177e4 LT	138	};
1da177e4 LT	139
86aa9fc2 JG	140	/**
	141	* crypt_s390_km:
	142	* @func: the function code passed to KM; see crypt_s390_km_func
	143	* @param: address of parameter block; see POP for details on each func
	144	* @dest: address of destination memory area
	145	* @src: address of source memory area
	146	* @src_len: length of src operand in bytes
	147	*
c1e26e1e	148	* Executes the KM (CIPHER MESSAGE) operation of the CPU.
86aa9fc2 JG	149	*
	150	* Returns -1 for failure, 0 for the query func, number of processed
	151	* bytes for encryption/decryption funcs
1da177e4	152	*/
86aa9fc2 JG	153	static inline int crypt_s390_km(long func, void *param,
86aa9fc2 JG	154	u8 dest, const u8 src, long src_len)
1da177e4	155	{
c1e26e1e	156	register long __func asm("0") = func & CRYPT_S390_FUNC_MASK;
86aa9fc2 JG	157	register void *__param asm("1") = param;
86aa9fc2 JG	158	register const u8 *__src asm("2") = src;
1da177e4	159	register long __src_len asm("3") = src_len;
86aa9fc2	160	register u8 *__dest asm("4") = dest;
1da177e4 LT	161	int ret;
1da177e4 LT	162
94c12cc7 MS	163	asm volatile(
94c12cc7 MS	164	"0: .insn rre,0xb92e0000,%3,%1 \n" /* KM opcode */
c1e26e1e	165	"1: brc 1,0b \n" /* handle partial completion */
86aa9fc2 JG	166	" la %0,0\n"
	167	"2:\n"
	168	EX_TABLE(0b,2b) EX_TABLE(1b,2b)
94c12cc7	169	: "=d" (ret), "+a" (__src), "+d" (__src_len), "+a" (__dest)
86aa9fc2	170	: "d" (__func), "a" (__param), "0" (-1) : "cc", "memory");
94c12cc7 MS	171	if (ret < 0)
	172	return ret;
	173	return (func & CRYPT_S390_FUNC_MASK) ? src_len - __src_len : __src_len;
1da177e4 LT	174	}
1da177e4 LT	175
86aa9fc2 JG	176	/**
	177	* crypt_s390_kmc:
	178	* @func: the function code passed to KM; see crypt_s390_kmc_func
	179	* @param: address of parameter block; see POP for details on each func
	180	* @dest: address of destination memory area
	181	* @src: address of source memory area
	182	* @src_len: length of src operand in bytes
	183	*
c1e26e1e	184	* Executes the KMC (CIPHER MESSAGE WITH CHAINING) operation of the CPU.
86aa9fc2 JG	185	*
	186	* Returns -1 for failure, 0 for the query func, number of processed
	187	* bytes for encryption/decryption funcs
1da177e4	188	*/
86aa9fc2 JG	189	static inline int crypt_s390_kmc(long func, void *param,
86aa9fc2 JG	190	u8 dest, const u8 src, long src_len)
1da177e4	191	{
c1e26e1e	192	register long __func asm("0") = func & CRYPT_S390_FUNC_MASK;
86aa9fc2 JG	193	register void *__param asm("1") = param;
86aa9fc2 JG	194	register const u8 *__src asm("2") = src;
1da177e4	195	register long __src_len asm("3") = src_len;
86aa9fc2	196	register u8 *__dest asm("4") = dest;
1da177e4 LT	197	int ret;
1da177e4 LT	198
94c12cc7 MS	199	asm volatile(
94c12cc7 MS	200	"0: .insn rre,0xb92f0000,%3,%1 \n" /* KMC opcode */
c1e26e1e	201	"1: brc 1,0b \n" /* handle partial completion */
86aa9fc2 JG	202	" la %0,0\n"
	203	"2:\n"
	204	EX_TABLE(0b,2b) EX_TABLE(1b,2b)
94c12cc7	205	: "=d" (ret), "+a" (__src), "+d" (__src_len), "+a" (__dest)
86aa9fc2	206	: "d" (__func), "a" (__param), "0" (-1) : "cc", "memory");
94c12cc7 MS	207	if (ret < 0)
	208	return ret;
	209	return (func & CRYPT_S390_FUNC_MASK) ? src_len - __src_len : __src_len;
1da177e4 LT	210	}
1da177e4 LT	211
86aa9fc2 JG	212	/**
	213	* crypt_s390_kimd:
	214	* @func: the function code passed to KM; see crypt_s390_kimd_func
	215	* @param: address of parameter block; see POP for details on each func
	216	* @src: address of source memory area
	217	* @src_len: length of src operand in bytes
	218	*
1da177e4	219	* Executes the KIMD (COMPUTE INTERMEDIATE MESSAGE DIGEST) operation
c1e26e1e	220	* of the CPU.
86aa9fc2 JG	221	*
	222	* Returns -1 for failure, 0 for the query func, number of processed
	223	* bytes for digest funcs
1da177e4	224	*/
86aa9fc2 JG	225	static inline int crypt_s390_kimd(long func, void *param,
86aa9fc2 JG	226	const u8 *src, long src_len)
1da177e4	227	{
c1e26e1e	228	register long __func asm("0") = func & CRYPT_S390_FUNC_MASK;
86aa9fc2 JG	229	register void *__param asm("1") = param;
86aa9fc2 JG	230	register const u8 *__src asm("2") = src;
1da177e4 LT	231	register long __src_len asm("3") = src_len;
	232	int ret;
	233
94c12cc7 MS	234	asm volatile(
	235	"0: .insn rre,0xb93e0000,%1,%1 \n" /* KIMD opcode */
	236	"1: brc 1,0b \n" /* handle partial completion */
86aa9fc2 JG	237	" la %0,0\n"
	238	"2:\n"
	239	EX_TABLE(0b,2b) EX_TABLE(1b,2b)
94c12cc7	240	: "=d" (ret), "+a" (__src), "+d" (__src_len)
86aa9fc2	241	: "d" (__func), "a" (__param), "0" (-1) : "cc", "memory");
94c12cc7 MS	242	if (ret < 0)
	243	return ret;
	244	return (func & CRYPT_S390_FUNC_MASK) ? src_len - __src_len : __src_len;
1da177e4 LT	245	}
1da177e4 LT	246
86aa9fc2 JG	247	/**
	248	* crypt_s390_klmd:
	249	* @func: the function code passed to KM; see crypt_s390_klmd_func
	250	* @param: address of parameter block; see POP for details on each func
	251	* @src: address of source memory area
	252	* @src_len: length of src operand in bytes
	253	*
c1e26e1e	254	* Executes the KLMD (COMPUTE LAST MESSAGE DIGEST) operation of the CPU.
86aa9fc2 JG	255	*
	256	* Returns -1 for failure, 0 for the query func, number of processed
	257	* bytes for digest funcs
1da177e4	258	*/
86aa9fc2 JG	259	static inline int crypt_s390_klmd(long func, void *param,
86aa9fc2 JG	260	const u8 *src, long src_len)
1da177e4	261	{
c1e26e1e	262	register long __func asm("0") = func & CRYPT_S390_FUNC_MASK;
86aa9fc2 JG	263	register void *__param asm("1") = param;
86aa9fc2 JG	264	register const u8 *__src asm("2") = src;
1da177e4 LT	265	register long __src_len asm("3") = src_len;
	266	int ret;
	267
94c12cc7 MS	268	asm volatile(
	269	"0: .insn rre,0xb93f0000,%1,%1 \n" /* KLMD opcode */
	270	"1: brc 1,0b \n" /* handle partial completion */
86aa9fc2 JG	271	" la %0,0\n"
	272	"2:\n"
	273	EX_TABLE(0b,2b) EX_TABLE(1b,2b)
94c12cc7	274	: "=d" (ret), "+a" (__src), "+d" (__src_len)
86aa9fc2	275	: "d" (__func), "a" (__param), "0" (-1) : "cc", "memory");
94c12cc7 MS	276	if (ret < 0)
	277	return ret;
	278	return (func & CRYPT_S390_FUNC_MASK) ? src_len - __src_len : __src_len;
1da177e4 LT	279	}
1da177e4 LT	280
86aa9fc2 JG	281	/**
	282	* crypt_s390_kmac:
	283	* @func: the function code passed to KM; see crypt_s390_klmd_func
	284	* @param: address of parameter block; see POP for details on each func
	285	* @src: address of source memory area
	286	* @src_len: length of src operand in bytes
	287	*
1da177e4	288	* Executes the KMAC (COMPUTE MESSAGE AUTHENTICATION CODE) operation
c1e26e1e	289	* of the CPU.
86aa9fc2 JG	290	*
	291	* Returns -1 for failure, 0 for the query func, number of processed
	292	* bytes for digest funcs
1da177e4	293	*/
86aa9fc2 JG	294	static inline int crypt_s390_kmac(long func, void *param,
86aa9fc2 JG	295	const u8 *src, long src_len)
1da177e4	296	{
c1e26e1e	297	register long __func asm("0") = func & CRYPT_S390_FUNC_MASK;
86aa9fc2 JG	298	register void *__param asm("1") = param;
86aa9fc2 JG	299	register const u8 *__src asm("2") = src;
1da177e4 LT	300	register long __src_len asm("3") = src_len;
	301	int ret;
	302
94c12cc7 MS	303	asm volatile(
	304	"0: .insn rre,0xb91e0000,%1,%1 \n" /* KLAC opcode */
	305	"1: brc 1,0b \n" /* handle partial completion */
86aa9fc2 JG	306	" la %0,0\n"
	307	"2:\n"
	308	EX_TABLE(0b,2b) EX_TABLE(1b,2b)
94c12cc7	309	: "=d" (ret), "+a" (__src), "+d" (__src_len)
86aa9fc2	310	: "d" (__func), "a" (__param), "0" (-1) : "cc", "memory");
94c12cc7 MS	311	if (ret < 0)
	312	return ret;
	313	return (func & CRYPT_S390_FUNC_MASK) ? src_len - __src_len : __src_len;
1da177e4 LT	314	}
1da177e4 LT	315
0200f3ec GS	316	/**
	317	* crypt_s390_kmctr:
	318	* @func: the function code passed to KMCTR; see crypt_s390_kmctr_func
	319	* @param: address of parameter block; see POP for details on each func
	320	* @dest: address of destination memory area
	321	* @src: address of source memory area
	322	* @src_len: length of src operand in bytes
	323	* @counter: address of counter value
	324	*
	325	* Executes the KMCTR (CIPHER MESSAGE WITH COUNTER) operation of the CPU.
	326	*
	327	* Returns -1 for failure, 0 for the query func, number of processed
	328	* bytes for encryption/decryption funcs
	329	*/
	330	static inline int crypt_s390_kmctr(long func, void param, u8 dest,
	331	const u8 src, long src_len, u8 counter)
	332	{
	333	register long __func asm("0") = func & CRYPT_S390_FUNC_MASK;
	334	register void *__param asm("1") = param;
	335	register const u8 *__src asm("2") = src;
	336	register long __src_len asm("3") = src_len;
	337	register u8 *__dest asm("4") = dest;
	338	register u8 *__ctr asm("6") = counter;
	339	int ret = -1;
	340
	341	asm volatile(
	342	"0: .insn rrf,0xb92d0000,%3,%1,%4,0 \n" /* KMCTR opcode */
	343	"1: brc 1,0b \n" /* handle partial completion */
	344	" la %0,0\n"
	345	"2:\n"
	346	EX_TABLE(0b,2b) EX_TABLE(1b,2b)
	347	: "+d" (ret), "+a" (__src), "+d" (__src_len), "+a" (__dest),
	348	"+a" (__ctr)
	349	: "d" (__func), "a" (__param) : "cc", "memory");
	350	if (ret < 0)
	351	return ret;
	352	return (func & CRYPT_S390_FUNC_MASK) ? src_len - __src_len : __src_len;
	353	}
	354
1da177e4	355	/**
86aa9fc2 JG	356	* crypt_s390_func_available:
	357	* @func: the function code of the specific function; 0 if op in general
	358	*
c1e26e1e	359	* Tests if a specific crypto function is implemented on the machine.
86aa9fc2 JG	360	*
86aa9fc2 JG	361	* Returns 1 if func available; 0 if func or op in general not available
1da177e4	362	*/
1822bc90 JG	363	static inline int crypt_s390_func_available(int func,
1822bc90 JG	364	unsigned int facility_mask)
1da177e4	365	{
86aa9fc2	366	unsigned char status[16];
1da177e4 LT	367	int ret;
1da177e4 LT	368
1822bc90 JG	369	if (facility_mask & CRYPT_S390_MSA && !test_facility(17))
1822bc90 JG	370	return 0;
6ed54387 JG	371
	372	if (facility_mask & CRYPT_S390_MSA3 &&
	373	(!test_facility(2) \|\| !test_facility(76)))
1822bc90	374	return 0;
6ed54387 JG	375	if (facility_mask & CRYPT_S390_MSA4 &&
6ed54387 JG	376	(!test_facility(2) \|\| !test_facility(77)))
a72f0dbf JG	377	return 0;
a72f0dbf JG	378
86aa9fc2 JG	379	switch (func & CRYPT_S390_OP_MASK) {
	380	case CRYPT_S390_KM:
	381	ret = crypt_s390_km(KM_QUERY, &status, NULL, NULL, 0);
	382	break;
	383	case CRYPT_S390_KMC:
	384	ret = crypt_s390_kmc(KMC_QUERY, &status, NULL, NULL, 0);
	385	break;
	386	case CRYPT_S390_KIMD:
	387	ret = crypt_s390_kimd(KIMD_QUERY, &status, NULL, 0);
	388	break;
	389	case CRYPT_S390_KLMD:
	390	ret = crypt_s390_klmd(KLMD_QUERY, &status, NULL, 0);
	391	break;
	392	case CRYPT_S390_KMAC:
	393	ret = crypt_s390_kmac(KMAC_QUERY, &status, NULL, 0);
	394	break;
0200f3ec GS	395	case CRYPT_S390_KMCTR:
	396	ret = crypt_s390_kmctr(KMCTR_QUERY, &status, NULL, NULL, 0,
	397	NULL);
	398	break;
86aa9fc2 JG	399	default:
86aa9fc2 JG	400	return 0;
1da177e4	401	}
86aa9fc2 JG	402	if (ret < 0)
	403	return 0;
	404	func &= CRYPT_S390_FUNC_MASK;
	405	func &= 0x7f; /* mask modifier bit */
	406	return (status[func >> 3] & (0x80 >> (func & 7))) != 0;
1da177e4 LT	407	}
1da177e4 LT	408
99d97222 GS	409	/**
	410	* crypt_s390_pcc:
	411	* @func: the function code passed to KM; see crypt_s390_km_func
	412	* @param: address of parameter block; see POP for details on each func
	413	*
	414	* Executes the PCC (PERFORM CRYPTOGRAPHIC COMPUTATION) operation of the CPU.
	415	*
	416	* Returns -1 for failure, 0 for success.
	417	*/
	418	static inline int crypt_s390_pcc(long func, void *param)
	419	{
	420	register long __func asm("0") = func & 0x7f; /* encrypt or decrypt */
	421	register void *__param asm("1") = param;
	422	int ret = -1;
	423
	424	asm volatile(
	425	"0: .insn rre,0xb92c0000,0,0 \n" /* PCC opcode */
	426	"1: brc 1,0b \n" /* handle partial completion */
	427	" la %0,0\n"
	428	"2:\n"
	429	EX_TABLE(0b,2b) EX_TABLE(1b,2b)
	430	: "+d" (ret)
	431	: "d" (__func), "a" (__param) : "cc", "memory");
	432	return ret;
	433	}
	434
	435
86aa9fc2	436	#endif /* _CRYPTO_ARCH_S390_CRYPT_S390_H */