s390/crypto: cleanup and move the header with the cpacf definitions

The CPACF instructions are going be used in KVM as well, move the
defines and the inline functions from arch/s390/crypt/crypt_s390.h
to arch/s390/include/asm. Rename the header to cpacf.h and replace
the crypt_s390_xxx names with cpacf_xxx.

While we are at it, cleanup the header as well. The encoding for
the CPACF operations is odd, there is an enum for each of the CPACF
instructions with the hardware function code in the lower 8 bits of
each entry and a software defined number for the CPACF instruction
in the upper 8 bits. Remove the superfluous software number and
replace the enums with simple defines.

The crypt_s390_func_available() function tests for the presence
of a specific CPACF operations. The new name of the function is
cpacf_query and it works slightly different than before. It gets
passed an opcode of an CPACF instruction and a function code for
this instruction. The facility_mask parameter is gone, the opcode
is used to find the correct MSA facility bit to check if the CPACF
instruction itself is available. If it is the query function of the
given instruction is used to test if the requested CPACF operation
is present.

Acked-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 34 insertions, 38 deletions

diff --git a/arch/s390/crypto/des_s390.c b/arch/s390/crypto/des_s390.c
index fba1c10a2dd0..697e71a75fc2 100644
--- a/arch/s390/crypto/des_s390.c
+++ b/arch/s390/crypto/des_s390.c
@@ -20,8 +20,7 @@
 #include <linux/crypto.h>
 #include <crypto/algapi.h>
 #include <crypto/des.h>
-
-#include "crypt_s390.h"
+#include <asm/cpacf.h>
 
 #define DES3_KEY_SIZE	(3 * DES_KEY_SIZE)
 
@@ -54,20 +53,20 @@ static void des_encrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
 {
 	struct s390_des_ctx *ctx = crypto_tfm_ctx(tfm);
 
-	crypt_s390_km(KM_DEA_ENCRYPT, ctx->key, out, in, DES_BLOCK_SIZE);
+	cpacf_km(CPACF_KM_DEA_ENC, ctx->key, out, in, DES_BLOCK_SIZE);
 }
 
 static void des_decrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
 {
 	struct s390_des_ctx *ctx = crypto_tfm_ctx(tfm);
 
-	crypt_s390_km(KM_DEA_DECRYPT, ctx->key, out, in, DES_BLOCK_SIZE);
+	cpacf_km(CPACF_KM_DEA_DEC, ctx->key, out, in, DES_BLOCK_SIZE);
 }
 
 static struct crypto_alg des_alg = {
 	.cra_name		=	"des",
 	.cra_driver_name	=	"des-s390",
-	.cra_priority		=	CRYPT_S390_PRIORITY,
+	.cra_priority		=	300,
 	.cra_flags		=	CRYPTO_ALG_TYPE_CIPHER,
 	.cra_blocksize		=	DES_BLOCK_SIZE,
 	.cra_ctxsize		=	sizeof(struct s390_des_ctx),
@@ -95,7 +94,7 @@ static int ecb_desall_crypt(struct blkcipher_desc *desc, long func,
 		u8 *out = walk->dst.virt.addr;
 		u8 *in = walk->src.virt.addr;
 
-		ret = crypt_s390_km(func, key, out, in, n);
+		ret = cpacf_km(func, key, out, in, n);
 		if (ret < 0 || ret != n)
 			return -EIO;
 
@@ -128,7 +127,7 @@ static int cbc_desall_crypt(struct blkcipher_desc *desc, long func,
 		u8 *out = walk->dst.virt.addr;
 		u8 *in = walk->src.virt.addr;
 
-		ret = crypt_s390_kmc(func, &param, out, in, n);
+		ret = cpacf_kmc(func, &param, out, in, n);
 		if (ret < 0 || ret != n)
 			return -EIO;
 
@@ -149,7 +148,7 @@ static int ecb_des_encrypt(struct blkcipher_desc *desc,
 	struct blkcipher_walk walk;
 
 	blkcipher_walk_init(&walk, dst, src, nbytes);
-	return ecb_desall_crypt(desc, KM_DEA_ENCRYPT, ctx->key, &walk);
+	return ecb_desall_crypt(desc, CPACF_KM_DEA_ENC, ctx->key, &walk);
 }
 
 static int ecb_des_decrypt(struct blkcipher_desc *desc,
@@ -160,13 +159,13 @@ static int ecb_des_decrypt(struct blkcipher_desc *desc,
 	struct blkcipher_walk walk;
 
 	blkcipher_walk_init(&walk, dst, src, nbytes);
-	return ecb_desall_crypt(desc, KM_DEA_DECRYPT, ctx->key, &walk);
+	return ecb_desall_crypt(desc, CPACF_KM_DEA_DEC, ctx->key, &walk);
 }
 
 static struct crypto_alg ecb_des_alg = {
 	.cra_name		=	"ecb(des)",
 	.cra_driver_name	=	"ecb-des-s390",
-	.cra_priority		=	CRYPT_S390_COMPOSITE_PRIORITY,
+	.cra_priority		=	400,	/* combo: des + ecb */
 	.cra_flags		=	CRYPTO_ALG_TYPE_BLKCIPHER,
 	.cra_blocksize		=	DES_BLOCK_SIZE,
 	.cra_ctxsize		=	sizeof(struct s390_des_ctx),
@@ -190,7 +189,7 @@ static int cbc_des_encrypt(struct blkcipher_desc *desc,
 	struct blkcipher_walk walk;
 
 	blkcipher_walk_init(&walk, dst, src, nbytes);
-	return cbc_desall_crypt(desc, KMC_DEA_ENCRYPT, &walk);
+	return cbc_desall_crypt(desc, CPACF_KMC_DEA_ENC, &walk);
 }
 
 static int cbc_des_decrypt(struct blkcipher_desc *desc,
@@ -200,13 +199,13 @@ static int cbc_des_decrypt(struct blkcipher_desc *desc,
 	struct blkcipher_walk walk;
 
 	blkcipher_walk_init(&walk, dst, src, nbytes);
-	return cbc_desall_crypt(desc, KMC_DEA_DECRYPT, &walk);
+	return cbc_desall_crypt(desc, CPACF_KMC_DEA_DEC, &walk);
 }
 
 static struct crypto_alg cbc_des_alg = {
 	.cra_name		=	"cbc(des)",
 	.cra_driver_name	=	"cbc-des-s390",
-	.cra_priority		=	CRYPT_S390_COMPOSITE_PRIORITY,
+	.cra_priority		=	400,	/* combo: des + cbc */
 	.cra_flags		=	CRYPTO_ALG_TYPE_BLKCIPHER,
 	.cra_blocksize		=	DES_BLOCK_SIZE,
 	.cra_ctxsize		=	sizeof(struct s390_des_ctx),
@@ -258,20 +257,20 @@ static void des3_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
 {
 	struct s390_des_ctx *ctx = crypto_tfm_ctx(tfm);
 
-	crypt_s390_km(KM_TDEA_192_ENCRYPT, ctx->key, dst, src, DES_BLOCK_SIZE);
+	cpacf_km(CPACF_KM_TDEA_192_ENC, ctx->key, dst, src, DES_BLOCK_SIZE);
 }
 
 static void des3_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
 {
 	struct s390_des_ctx *ctx = crypto_tfm_ctx(tfm);
 
-	crypt_s390_km(KM_TDEA_192_DECRYPT, ctx->key, dst, src, DES_BLOCK_SIZE);
+	cpacf_km(CPACF_KM_TDEA_192_DEC, ctx->key, dst, src, DES_BLOCK_SIZE);
 }
 
 static struct crypto_alg des3_alg = {
 	.cra_name		=	"des3_ede",
 	.cra_driver_name	=	"des3_ede-s390",
-	.cra_priority		=	CRYPT_S390_PRIORITY,
+	.cra_priority		=	300,
 	.cra_flags		=	CRYPTO_ALG_TYPE_CIPHER,
 	.cra_blocksize		=	DES_BLOCK_SIZE,
 	.cra_ctxsize		=	sizeof(struct s390_des_ctx),
@@ -295,7 +294,7 @@ static int ecb_des3_encrypt(struct blkcipher_desc *desc,
 	struct blkcipher_walk walk;
 
 	blkcipher_walk_init(&walk, dst, src, nbytes);
-	return ecb_desall_crypt(desc, KM_TDEA_192_ENCRYPT, ctx->key, &walk);
+	return ecb_desall_crypt(desc, CPACF_KM_TDEA_192_ENC, ctx->key, &walk);
 }
 
 static int ecb_des3_decrypt(struct blkcipher_desc *desc,
@@ -306,13 +305,13 @@ static int ecb_des3_decrypt(struct blkcipher_desc *desc,
 	struct blkcipher_walk walk;
 
 	blkcipher_walk_init(&walk, dst, src, nbytes);
-	return ecb_desall_crypt(desc, KM_TDEA_192_DECRYPT, ctx->key, &walk);
+	return ecb_desall_crypt(desc, CPACF_KM_TDEA_192_DEC, ctx->key, &walk);
 }
 
 static struct crypto_alg ecb_des3_alg = {
 	.cra_name		=	"ecb(des3_ede)",
 	.cra_driver_name	=	"ecb-des3_ede-s390",
-	.cra_priority		=	CRYPT_S390_COMPOSITE_PRIORITY,
+	.cra_priority		=	400,	/* combo: des3 + ecb */
 	.cra_flags		=	CRYPTO_ALG_TYPE_BLKCIPHER,
 	.cra_blocksize		=	DES_BLOCK_SIZE,
 	.cra_ctxsize		=	sizeof(struct s390_des_ctx),
@@ -336,7 +335,7 @@ static int cbc_des3_encrypt(struct blkcipher_desc *desc,
 	struct blkcipher_walk walk;
 
 	blkcipher_walk_init(&walk, dst, src, nbytes);
-	return cbc_desall_crypt(desc, KMC_TDEA_192_ENCRYPT, &walk);
+	return cbc_desall_crypt(desc, CPACF_KMC_TDEA_192_ENC, &walk);
 }
 
 static int cbc_des3_decrypt(struct blkcipher_desc *desc,
@@ -346,13 +345,13 @@ static int cbc_des3_decrypt(struct blkcipher_desc *desc,
 	struct blkcipher_walk walk;
 
 	blkcipher_walk_init(&walk, dst, src, nbytes);
-	return cbc_desall_crypt(desc, KMC_TDEA_192_DECRYPT, &walk);
+	return cbc_desall_crypt(desc, CPACF_KMC_TDEA_192_DEC, &walk);
 }
 
 static struct crypto_alg cbc_des3_alg = {
 	.cra_name		=	"cbc(des3_ede)",
 	.cra_driver_name	=	"cbc-des3_ede-s390",
-	.cra_priority		=	CRYPT_S390_COMPOSITE_PRIORITY,
+	.cra_priority		=	400,	/* combo: des3 + cbc */
 	.cra_flags		=	CRYPTO_ALG_TYPE_BLKCIPHER,
 	.cra_blocksize		=	DES_BLOCK_SIZE,
 	.cra_ctxsize		=	sizeof(struct s390_des_ctx),
@@ -407,8 +406,7 @@ static int ctr_desall_crypt(struct blkcipher_desc *desc, long func,
 				n = __ctrblk_init(ctrptr, nbytes);
 			else
 				n = DES_BLOCK_SIZE;
-			ret = crypt_s390_kmctr(func, ctx->key, out, in,
-					       n, ctrptr);
+			ret = cpacf_kmctr(func, ctx->key, out, in, n, ctrptr);
 			if (ret < 0 || ret != n) {
 				if (ctrptr == ctrblk)
 					spin_unlock(&ctrblk_lock);
@@ -438,8 +436,8 @@ static int ctr_desall_crypt(struct blkcipher_desc *desc, long func,
 	if (nbytes) {
 		out = walk->dst.virt.addr;
 		in = walk->src.virt.addr;
-		ret = crypt_s390_kmctr(func, ctx->key, buf, in,
-				       DES_BLOCK_SIZE, ctrbuf);
+		ret = cpacf_kmctr(func, ctx->key, buf, in,
+				  DES_BLOCK_SIZE, ctrbuf);
 		if (ret < 0 || ret != DES_BLOCK_SIZE)
 			return -EIO;
 		memcpy(out, buf, nbytes);
@@ -458,7 +456,7 @@ static int ctr_des_encrypt(struct blkcipher_desc *desc,
 	struct blkcipher_walk walk;
 
 	blkcipher_walk_init(&walk, dst, src, nbytes);
-	return ctr_desall_crypt(desc, KMCTR_DEA_ENCRYPT, ctx, &walk);
+	return ctr_desall_crypt(desc, CPACF_KMCTR_DEA_ENC, ctx, &walk);
 }
 
 static int ctr_des_decrypt(struct blkcipher_desc *desc,
@@ -469,13 +467,13 @@ static int ctr_des_decrypt(struct blkcipher_desc *desc,
 	struct blkcipher_walk walk;
 
 	blkcipher_walk_init(&walk, dst, src, nbytes);
-	return ctr_desall_crypt(desc, KMCTR_DEA_DECRYPT, ctx, &walk);
+	return ctr_desall_crypt(desc, CPACF_KMCTR_DEA_DEC, ctx, &walk);
 }
 
 static struct crypto_alg ctr_des_alg = {
 	.cra_name		=	"ctr(des)",
 	.cra_driver_name	=	"ctr-des-s390",
-	.cra_priority		=	CRYPT_S390_COMPOSITE_PRIORITY,
+	.cra_priority		=	400,	/* combo: des + ctr */
 	.cra_flags		=	CRYPTO_ALG_TYPE_BLKCIPHER,
 	.cra_blocksize		=	1,
 	.cra_ctxsize		=	sizeof(struct s390_des_ctx),
@@ -501,7 +499,7 @@ static int ctr_des3_encrypt(struct blkcipher_desc *desc,
 	struct blkcipher_walk walk;
 
 	blkcipher_walk_init(&walk, dst, src, nbytes);
-	return ctr_desall_crypt(desc, KMCTR_TDEA_192_ENCRYPT, ctx, &walk);
+	return ctr_desall_crypt(desc, CPACF_KMCTR_TDEA_192_ENC, ctx, &walk);
 }
 
 static int ctr_des3_decrypt(struct blkcipher_desc *desc,
@@ -512,13 +510,13 @@ static int ctr_des3_decrypt(struct blkcipher_desc *desc,
 	struct blkcipher_walk walk;
 
 	blkcipher_walk_init(&walk, dst, src, nbytes);
-	return ctr_desall_crypt(desc, KMCTR_TDEA_192_DECRYPT, ctx, &walk);
+	return ctr_desall_crypt(desc, CPACF_KMCTR_TDEA_192_DEC, ctx, &walk);
 }
 
 static struct crypto_alg ctr_des3_alg = {
 	.cra_name		=	"ctr(des3_ede)",
 	.cra_driver_name	=	"ctr-des3_ede-s390",
-	.cra_priority		=	CRYPT_S390_COMPOSITE_PRIORITY,
+	.cra_priority		=	400,	/* combo: des3 + ede */
 	.cra_flags		=	CRYPTO_ALG_TYPE_BLKCIPHER,
 	.cra_blocksize		=	1,
 	.cra_ctxsize		=	sizeof(struct s390_des_ctx),
@@ -540,8 +538,8 @@ static int __init des_s390_init(void)
 {
 	int ret;
 
-	if (!crypt_s390_func_available(KM_DEA_ENCRYPT, CRYPT_S390_MSA) ||
-	    !crypt_s390_func_available(KM_TDEA_192_ENCRYPT, CRYPT_S390_MSA))
+	if (!cpacf_query(CPACF_KM, CPACF_KM_DEA_ENC) ||
+	    !cpacf_query(CPACF_KM, CPACF_KM_TDEA_192_ENC))
 		return -EOPNOTSUPP;
 
 	ret = crypto_register_alg(&des_alg);
@@ -563,10 +561,8 @@ static int __init des_s390_init(void)
 	if (ret)
 		goto cbc_des3_err;
 
-	if (crypt_s390_func_available(KMCTR_DEA_ENCRYPT,
-			CRYPT_S390_MSA | CRYPT_S390_MSA4) &&
-	    crypt_s390_func_available(KMCTR_TDEA_192_ENCRYPT,
-			CRYPT_S390_MSA | CRYPT_S390_MSA4)) {
+	if (cpacf_query(CPACF_KMCTR, CPACF_KMCTR_DEA_ENC) &&
+	    cpacf_query(CPACF_KMCTR, CPACF_KMCTR_TDEA_192_ENC)) {
 		ret = crypto_register_alg(&ctr_des_alg);
 		if (ret)
 			goto ctr_des_err;