[CRYPTO] sha512: Hardware acceleration for s390

Exploit the System z10 hardware acceleration for SHA512.

Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 71 insertions, 0 deletions

diff --git a/arch/s390/crypto/sha512_s390.c b/arch/s390/crypto/sha512_s390.c
new file mode 100644
index 0000000..4d651bb
--- /dev/null
+++ b/arch/s390/crypto/sha512_s390.c
@@ -0,0 +1,71 @@
+/*
+ * Cryptographic API.
+ *
+ * s390 implementation of the SHA512 Secure Hash Algorithm.
+ *
+ * Copyright IBM Corp. 2007
+ * Author(s): Jan Glauber (jang@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.
+ *
+ */
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/crypto.h>
+
+#include "sha.h"
+#include "crypt_s390.h"
+
+static void sha512_init(struct crypto_tfm *tfm)
+{
+	struct s390_sha_ctx *ctx = crypto_tfm_ctx(tfm);
+
+	*(__u64 *)&ctx->state[0] = 0x6a09e667f3bcc908ULL;
+	*(__u64 *)&ctx->state[2] = 0xbb67ae8584caa73bULL;
+	*(__u64 *)&ctx->state[4] = 0x3c6ef372fe94f82bULL;
+	*(__u64 *)&ctx->state[6] = 0xa54ff53a5f1d36f1ULL;
+	*(__u64 *)&ctx->state[8] = 0x510e527fade682d1ULL;
+	*(__u64 *)&ctx->state[10] = 0x9b05688c2b3e6c1fULL;
+	*(__u64 *)&ctx->state[12] = 0x1f83d9abfb41bd6bULL;
+	*(__u64 *)&ctx->state[14] = 0x5be0cd19137e2179ULL;
+	ctx->count = 0;
+	ctx->func = KIMD_SHA_512;
+}
+
+static struct crypto_alg alg = {
+	.cra_name	=	"sha512",
+	.cra_driver_name =	"sha512-s390",
+	.cra_priority	=	CRYPT_S390_PRIORITY,
+	.cra_flags	=	CRYPTO_ALG_TYPE_DIGEST,
+	.cra_blocksize	=	SHA512_BLOCK_SIZE,
+	.cra_ctxsize	=	sizeof(struct s390_sha_ctx),
+	.cra_module	=	THIS_MODULE,
+	.cra_list	=	LIST_HEAD_INIT(alg.cra_list),
+	.cra_u		=	{ .digest = {
+	.dia_digestsize	=	SHA512_DIGEST_SIZE,
+	.dia_init	=	sha512_init,
+	.dia_update	=	s390_sha_update,
+	.dia_final	=	s390_sha_final } }
+};
+
+static int __init init(void)
+{
+	if (!crypt_s390_func_available(KIMD_SHA_512))
+		return -EOPNOTSUPP;
+	return crypto_register_alg(&alg);
+}
+
+static void __exit fini(void)
+{
+	crypto_unregister_alg(&alg);
+}
+
+module_init(init);
+module_exit(fini);
+
+MODULE_ALIAS("sha512");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("SHA512 Secure Hash Algorithm");